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Selection and installation of sliding switch of belt conveyor Installation method and matters needing attention
Selection and installation of sliding switch of belt conveyor Installation method and matters needing attention:
The relation between the diameter of the conveying drum of the belt conveyor and the belt layer of the conveyor belt, the matching of the driving drum, the groove Angle of the reversing drum and the drum should be selected reasonably according to the design regulations of the conveyor.
The feed direction shall be in the running direction of the conveyor belt. In order to reduce the impact of falling materials on the conveyor belt, chute should be used to reduce the falling distance of materials.
The receiving part of the conveyor belt should shorten the spacing between idler wheels and use buffer rolls as leakage materials.
The belt conforms to a soft and moderate baffle to prevent the baffle from being too hard and scratching the belt surface of the conveyor belt.

Selection principles and precautions:
Select the appropriate installation method according to the product type; Non-contact sliding switches should be installed away from strong electromagnetic interference and covered with a metal cover.
The slip alarm value should be set after the actual measurement; The speed parameters of each belt conveyor are usually different, and the actual belt running speed is also affected by the installation method and structure of the conveyor, so each conveyor must be set up one by one. The action alarm value of the sliding switch of the machine.
Some products can automatically avoid low speed when the conveyor starts: the conveyor will power the slide switch at the same time the conveyor starts. After the slide switch is energized, after a period of time, it will begin to detect belt speed normally. Try to display real speed and remote display. A product that transmits speed signals.
By installing two protective devices, steer switch and slide switch, belt conveyors can effectively reduce the possibility of conveyor failure, reduce downtime, and better protect transportation equipment and personnel. The products corresponding to the measuring range should be selected according to the actual moving speed of the belt conveyor being measured; Usually, when the conveyor is in normal operation, the speed of the belt running line is about 2.5-4m /s, and the speed of the drum is about 50-300rpm. At the same time, in addition to comparing the rotation speed of the drum and the speed of the conveyor belt, and comparing the sliding switch type, choose the product that can automatically avoid the low speed when the conveyor belt starts. Because the slip alarm of the coal conveyor belt is actually a low speed alarm, therefore, the slip alarm should be shielded during the start of the conveyor. A delay detection method for belt startup can be used (i.e., the delay is delayed for some time after the start of startup, and the working power of the skid switch is turned on after the belt conveyor reaches the belt. Normal speed), but more cumbersome to implement.
What are the factors affecting the service life of the steel wire rope conveyor belt
With the continuous development and progress of our conveyor belt industry, the putting into use of steel wire rope conveyor belt has brought great convenience for the development of coal, port, mining and other industries. The specifications of steel wire rope conveyor belt are different, and the service life is also different. There are many factors affecting the service life of conveyor belt in real life. Today, I will introduce what are the factors that affect the service life of the steel wire rope conveyor belt:
1. In the process of use, temperature and environment will affect the service life of wire rope core conveyor belt
2. The dip Angle of the steel wire rope core conveyor belt depends on the running speed
3. The conveyor belt runs under overload for a long working time
4. Use with unsuitable conveying machinery
5. Incorrect manual operation habits
6. The conveyor belt cannot be maintained regularly
7. Storage of wire rope conveyor belt in an incorrect way
Large dip Angle belt conveyor selection basis
Big dip belt conveyor and ordinary conveyor is different point is the use of inclined transport, it is suitable for the quality of 500 ~ 2500kg/m3, lumpiness is about 100 ~ 250mm material, used in metallurgy, chemical industry, coal, electric power and other industries, so big dip belt conveyor selection need to know what factors? Here is a detailed analysis:
Large dip Angle belt conveyor selection requirements
1. Determine the specifications of the conveyor belt and the power of the motor;
2, choose the belt conveyor needs zero, parts;
3. Produce drawings.
Large dip Angle belt conveyor selection basis
1, according to the conveying material and unloading method to determine the transport line of large dip Angle belt conveyor. Such as according to the location of the material point and unloading point, you can determine the horizontal conveyor belt distance, dip Angle and lifting height.
2, according to the terrain of the conveying line and the relationship between the adjacent equipment. Determine whether the conveyor conveyor line is set up curve section, or whether the intermediate need to set transfer point.
3, according to the nature of conveying materials and working environment, can determine the speed, bandwidth.
4, according to the production requirements of the conveyor, can determine the specifications of the conveyor.
The above is the large dip Angle belt conveyor selection requirements and basis, hope to help you.
What are the reasons for the cracking of rubber conveyor belt joint
There are usually three kinds of rubber conveyor belt joint. The rubber conveyor belt is a mechanical joint, a cold rubber joint and a hot vulcanized joint. The strength of conveyor belt joint is lower than the strength of its own belt body. When the conveyor belt uses mechanical joint, the joint strength can only reach 40-50% of the strength of the belt body. When cold adhesive is selected for the conveyor belt, the joint strength can reach 60-70%. When hot vulcanized joints, the joint strength of the conveyor belt can reach 80-90%.
The strength of the conveyor belt joint is relatively low. If the bonding method is not accurate, the strength of the conveyor belt joint will be lower. If the cutter and conveyor belt grinding damage the next layer of canvas, grinding too much, the lap length is not good, the number of steps is not good, the rubber function of the joint is not good or has already self-sulfur failure, steel wire rope grinding too much, steel wire rope rust, etc., the strength of the joint will be greatly reduced, when in use, it is easy to show the scene of conveyor belt joint disconnection and cracking. If the conveyor belt does not choose sealing glue, or the direction of the joint is wrong, the joint (surface glue part) will also show the cracking scene.
Avoid cracking from the source, add cracking inspection equipment, check the results in the shortest time, send an alarm and stop. Belt tear is formed by a variety of factors, can not completely avoid the cracking of the conveyor belt, tear prevention equipment and inspection equipment is mainly torn inspection equipment, usually located in the blanking point, composed of sensors and controllers, sensors installed under the conveyor belt or chute, controller installed in the machine side or indoor.
Application of deviation switch on belt conveyor
In the use of belt conveyor, the running state of the off-deviation switch is directly related to the life of equipment and personnel in the production process. Therefore, it is of great practical significance to make the protective device of belt conveyor play its protective role stably and reliably in production operation. It is a common problem that the belt conveyor is easy to run off and slip in operation, which is easy to lead to the failure of the conveyor belt. The following mini-series explains the selection and installation of deviation switches.
Belt conveyor deviation switch is a protective device, used to detect the degree of belt deviation in the running process of the belt conveyor and send an alarm, also used to trigger emergency stop automatically when the belt serious deviation. The deviation switch is fixed on the bracket on both sides of the belt conveyor at a certain interval, and the roller part of the deviation switch is deflected after being squeezed by the edge of the deviation conveyor belt. When the roller deflects to a certain Angle, the switch contact is triggered. It can detect different degrees of belt deviation and provide more information for the control system. Preferred products with action memory and action state indication on the switch body. Because the belt conveyor is in the dynamic running state, with this function can be convenient to determine the specific location of the belt deviation, analyze the causes of the belt deviation, convenient equipment debugging and maintenance. The mounting bracket of the deviation switch shall be constructed to adjust the position of the deviation switch horizontally along the belt. This is to adjust the permissible deviation range in a small range according to the actual situation on site.
Common method of rubber conveyor belt installation
Whether it is a new conveyor, or a rubber conveyor belt, or an old conveyor belt, it needs to be installed on the conveyor to be used, so how to install the conveyor belt on the conveyor? And how to replace the old conveyor belt? The following is a brief introduction to you
Precautions for rubber conveyor belt installation:
First, pay attention to the working rubber surface and non-working rubber surface of the conveyor belt, and the working rubber surface faces outward. (The working face is the thicker side of the adhesive)
2. When attaching the new conveyor belt to the old conveyor belt, pay attention to the new and old conveyor belt to be parallel to prevent the conveyor belt from running off.
3. Arrange personnel to guard the conveyor belt by sections to prevent rubbing and scratching, especially when the belt passes through the roller and the feeding port.
Ring conveyor belt installation method: ring conveyor belt is already done joint conveyor belt, this conveyor belt installation or replacement, are more troublesome, now less used. The specific method is to install the lower belt roller first, then spread the belt to the conveyor, install the driving roller, then install the support roller, and finally install the reversing roller. This is more suitable for the first installation of the conveyor.
Lifting above the conveyor replacement method: This method is to lift the conveyor belt to the conveyor above, using the conveyor electric roller rotation, the belt is installed on the conveyor, this method is more labor-saving, and whether the new conveyor belt installation, or the old conveyor belt replacement can be.
Replacement method of conveyor belt at the tail of the machine: lift the conveyor belt to be replaced to the end of the conveyor belt, attach the new belt to the old belt, and wear the new belt to the conveyor with the rotation drive of the belt. This method is also suitable for new and old belt replacement. The method of replacing the conveyor belt under the counterweight is to replace the conveyor belt under the counterweight iron of the conveyor, connect the old and new belts together, and use the roller to rotate the belt. This method is less labor, is the most commonly used method, but the disadvantage of the new belt joint is more laborious.
How to properly install the conveyor belt of the belt conveyor
Whether replacing the belt conveyor conveyor belt or reinstalling the conveyor belt on a new transmission device, it is recommended to follow the following steps:
1. Turn off the power supply of the belt conveyor, remove the protective cover, loosen the assembly bolt of the motor, move the motor, so that the conveyor belt is relaxed enough and can be removed without prying open. Do not pry down the conveyor belt for kW.
2. Take down the old conveyor belt and check whether there is abnormal wear. Excessive wear may mean that there are problems in the design and maintenance of the transmission device.
3. Select appropriate conveyor belt replacement.
4. Clean the conveyor belt and pulley, should be stained with a little non-volatile liquid wipe, soak in detergent or use detergent to scrub the conveyor belt is not available, in order to remove oil and dirt, sandpaper wipe or scrape with sharp objects, obviously is not desirable. Conveyor belts must be kept dry before installation and use.
5. Check whether the belt conveyor pulley has abnormal wear and whether it is linear symmetry. Linear symmetry of the belt pulley is very important for the operation of the conveyor belt transmission device.
6. Check the rest of the transmission components of the belt conveyor, such as the symmetry, durability and lubrication of the bearing and shaft sleeve.
7. Install a new conveyor belt on the belt pulley of the belt conveyor. Do not pry or exert too much force.
8. Tighten the center distance of the transmission device of the belt conveyor until the tension measuring instrument detects that the tension of the conveyor belt is appropriate. Then turn the driving wheel several times by hand to remeasure the tension.
9. Tighten the assembly bolts of the motor to correct the torque. Since any change in the center distance of the rotating device during operation will lead to poor performance of the conveyor belt, it is necessary to ensure that all parts of the rotating device are tightened.
10. Although the belt conveyor belt no longer needs to adjust the tension, we still suggest starting the device and observing the performance of the conveyor belt to check whether there is abnormal vibration and listen carefully to whether there is abnormal noise. It is best to turn off the machine and check the condition of the bearing and motor.
How to adjust the tightness of conveyor belt
First, the conveyor belt tightness is not appropriate harm
(1) When it is too loose, the friction between the belt and the driving roller is not enough, which will cause the lack of sufficient friction between the belt and the driving roller, and the belt will slip. Under normal circumstances, it will lead to poor delivery, and serious skidding will produce a lot of heat, resulting in local belt temperature is too high and damaged.
(2) When it is too tight, it will cause excessive stretching of the belt, shorten the service life of the belt, increase the stress of the main, driven and tensioning rollers, affect the life of the bearing, and even lead to the fracture of various rollers.
Two, conveying belt tightness adjustment method
(1) The axis of the driving roller and the driven roller must be perpendicular to the running direction of the conveyor belt.
(2) Due to the need of positioning, the driving roller is generally fixed in the appropriate position, usually adjust the distance of the driven roller.
(3) Adjust the tension adjusting bolts on both sides of the driven roll synchronously, and properly tighten the belt to ensure that the driven roller line is perpendicular to the running direction of the belt.
Several correct installation methods of conveyor belt
1. Flat upturning method: Before the conveyor frame is installed, place the lower conveyor belt along the installation center line on the bottom plate. After the frame is installed, the lower flat roller lifts the conveyor belt and installs it on the idler base. Then assemble the trough idler on the frame, put the upper conveyor belt along the side of the conveyor belt installation, starting from one end, the conveyor belt section by section up, placed on the idler, it is faster and less labor than translation up.
2. Hanging method: Hang the whole roll of conveyor belt above the conveyor track, manually pull out the conveyor belt and put it on the flat idlers in the lower return section. After the installation of the lower conveyor belt, assemble the upper groove idlers in the frame. In the same way, the upper conveyor belt is placed on the groove idler.
3. High setting method of rolling simple: Support the conveyor belt drum in the appropriate position, use a small winch to wrap steel wire rope to pull one end of the conveyor belt, and place it along the whole conveyor path.
4. Comprehensive method: Place the lower conveyor belt with the flat upturning method, and then install the upper roller, lift the whole roll of conveyor belt above or below the conveyor road, and use a small winch to pull one end of the conveyor belt and place it along the whole conveyor road.
The above are several conveyor belt installation methods, but in the installation of conveyor belt, according to the installation environment to determine which method to use for installation, so that the installation will be more convenient.
Application of steel buckle on rubber conveyor belt
Rubber conveyor belt buckle is also called belt buckle, there are many kinds of steel buckle, common light conveyor belt buckle needle buckle, Wolf mouth, bow buckle, zipper buckle. What equipment is the steel buckle mainly used in? Which industries use hair buckle more? With these problems, let's take a detailed look at the use of steel buckle and matters needing attention.
First of all, steel buckle is mainly used in the transmission environment of inconvenient rubber conveyor belt replacement, difficult to disassemble and install equipment, short downtime, difficult installation of emergency conveyor belt repair, and short construction period. Therefore, the use of steel buckle greatly enriches the use of the conveyor belt scene and improves the production efficiency of the conveyor equipment. As long as there is a conveying place, there is no special requirement for the conveyor belt joint can be connected with steel buckle.
Bands that use steel buckles rarely have extra thin and extra thick bands, and most bands that use steel buckles are around 2-6mm thick. Steel buckle because of its convenient replacement, easy to modify, in many cases can be processed on site. In summary, there are two characteristics of the use of steel buckle industry. First, the conveyor belt is often replaced, and even the length needs to be adjusted. Second: the conveyor modification is difficult, need to do equipment maintenance in a short time.
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Selection and installation of sliding switch of belt conveyor Installation method and matters needing attention

Selection and installation of sliding switch of belt conveyor Installation method and matters needing attention

Jan 31, 2023

01-312023

Selection and installation of sliding switch of belt conveyor Installation method and matters needing attention:
The relation between the diameter of the conveying drum of the belt conveyor and the belt layer of the conveyor belt, the matching of the driving drum, the groove Angle of the reversing drum and the drum should be selected reasonably according to the design regulations of the conveyor.
The feed direction shall be in the running direction of the conveyor belt. In order to reduce the impact of falling materials on the conveyor belt, chute should be used to reduce the falling distance of materials.
The receiving part of the conveyor belt should shorten the spacing between idler wheels and use buffer rolls as leakage materials.
The belt conforms to a soft and moderate baffle to prevent the baffle from being too hard and scratching the belt surface of the conveyor belt.

Selection principles and precautions:
Select the appropriate installation method according to the product type; Non-contact sliding switches should be installed away from strong electromagnetic interference and covered with a metal cover.
The slip alarm value should be set after the actual measurement; The speed parameters of each belt conveyor are usually different, and the actual belt running speed is also affected by the installation method and structure of the conveyor, so each conveyor must be set up one by one. The action alarm value of the sliding switch of the machine.
Some products can automatically avoid low speed when the conveyor starts: the conveyor will power the slide switch at the same time the conveyor starts. After the slide switch is energized, after a period of time, it will begin to detect belt speed normally. Try to display real speed and remote display. A product that transmits speed signals.
By installing two protective devices, steer switch and slide switch, belt conveyors can effectively reduce the possibility of conveyor failure, reduce downtime, and better protect transportation equipment and personnel. The products corresponding to the measuring range should be selected according to the actual moving speed of the belt conveyor being measured; Usually, when the conveyor is in normal operation, the speed of the belt running line is about 2.5-4m /s, and the speed of the drum is about 50-300rpm. At the same time, in addition to comparing the rotation speed of the drum and the speed of the conveyor belt, and comparing the sliding switch type, choose the product that can automatically avoid the low speed when the conveyor belt starts. Because the slip alarm of the coal conveyor belt is actually a low speed alarm, therefore, the slip alarm should be shielded during the start of the conveyor. A delay detection method for belt startup can be used (i.e., the delay is delayed for some time after the start of startup, and the working power of the skid switch is turned on after the belt conveyor reaches the belt. Normal speed), but more cumbersome to implement.
Large dip Angle belt conveyor selection basis

Large dip Angle belt conveyor selection basis

Jan 31, 2023

01-312023

Big dip belt conveyor and ordinary conveyor is different point is the use of inclined transport, it is suitable for the quality of 500 ~ 2500kg/m3, lumpiness is about 100 ~ 250mm material, used in metallurgy, chemical industry, coal, electric power and other industries, so big dip belt conveyor selection need to know what factors? Here is a detailed analysis:
Large dip Angle belt conveyor selection requirements
1. Determine the specifications of the conveyor belt and the power of the motor;
2, choose the belt conveyor needs zero, parts;
3. Produce drawings.
Large dip Angle belt conveyor selection basis
1, according to the conveying material and unloading method to determine the transport line of large dip Angle belt conveyor. Such as according to the location of the material point and unloading point, you can determine the horizontal conveyor belt distance, dip Angle and lifting height.
2, according to the terrain of the conveying line and the relationship between the adjacent equipment. Determine whether the conveyor conveyor line is set up curve section, or whether the intermediate need to set transfer point.
3, according to the nature of conveying materials and working environment, can determine the speed, bandwidth.
4, according to the production requirements of the conveyor, can determine the specifications of the conveyor.
The above is the large dip Angle belt conveyor selection requirements and basis, hope to help you.
Application of deviation switch on belt conveyor

Application of deviation switch on belt conveyor

Jan 30, 2023

01-302023

In the use of belt conveyor, the running state of the off-deviation switch is directly related to the life of equipment and personnel in the production process. Therefore, it is of great practical significance to make the protective device of belt conveyor play its protective role stably and reliably in production operation. It is a common problem that the belt conveyor is easy to run off and slip in operation, which is easy to lead to the failure of the conveyor belt. The following mini-series explains the selection and installation of deviation switches.
Belt conveyor deviation switch is a protective device, used to detect the degree of belt deviation in the running process of the belt conveyor and send an alarm, also used to trigger emergency stop automatically when the belt serious deviation. The deviation switch is fixed on the bracket on both sides of the belt conveyor at a certain interval, and the roller part of the deviation switch is deflected after being squeezed by the edge of the deviation conveyor belt. When the roller deflects to a certain Angle, the switch contact is triggered. It can detect different degrees of belt deviation and provide more information for the control system. Preferred products with action memory and action state indication on the switch body. Because the belt conveyor is in the dynamic running state, with this function can be convenient to determine the specific location of the belt deviation, analyze the causes of the belt deviation, convenient equipment debugging and maintenance. The mounting bracket of the deviation switch shall be constructed to adjust the position of the deviation switch horizontally along the belt. This is to adjust the permissible deviation range in a small range according to the actual situation on site.
How to properly install the conveyor belt of the belt conveyor

How to properly install the conveyor belt of the belt conveyor

Jan 30, 2023

01-302023

Whether replacing the belt conveyor conveyor belt or reinstalling the conveyor belt on a new transmission device, it is recommended to follow the following steps:
1. Turn off the power supply of the belt conveyor, remove the protective cover, loosen the assembly bolt of the motor, move the motor, so that the conveyor belt is relaxed enough and can be removed without prying open. Do not pry down the conveyor belt for kW.
2. Take down the old conveyor belt and check whether there is abnormal wear. Excessive wear may mean that there are problems in the design and maintenance of the transmission device.
3. Select appropriate conveyor belt replacement.
4. Clean the conveyor belt and pulley, should be stained with a little non-volatile liquid wipe, soak in detergent or use detergent to scrub the conveyor belt is not available, in order to remove oil and dirt, sandpaper wipe or scrape with sharp objects, obviously is not desirable. Conveyor belts must be kept dry before installation and use.
5. Check whether the belt conveyor pulley has abnormal wear and whether it is linear symmetry. Linear symmetry of the belt pulley is very important for the operation of the conveyor belt transmission device.
6. Check the rest of the transmission components of the belt conveyor, such as the symmetry, durability and lubrication of the bearing and shaft sleeve.
7. Install a new conveyor belt on the belt pulley of the belt conveyor. Do not pry or exert too much force.
8. Tighten the center distance of the transmission device of the belt conveyor until the tension measuring instrument detects that the tension of the conveyor belt is appropriate. Then turn the driving wheel several times by hand to remeasure the tension.
9. Tighten the assembly bolts of the motor to correct the torque. Since any change in the center distance of the rotating device during operation will lead to poor performance of the conveyor belt, it is necessary to ensure that all parts of the rotating device are tightened.
10. Although the belt conveyor belt no longer needs to adjust the tension, we still suggest starting the device and observing the performance of the conveyor belt to check whether there is abnormal vibration and listen carefully to whether there is abnormal noise. It is best to turn off the machine and check the condition of the bearing and motor.
Application of steel buckle on rubber conveyor belt

Application of steel buckle on rubber conveyor belt

Jan 29, 2023

01-292023

Rubber conveyor belt buckle is also called belt buckle, there are many kinds of steel buckle, common light conveyor belt buckle needle buckle, Wolf mouth, bow buckle, zipper buckle. What equipment is the steel buckle mainly used in? Which industries use hair buckle more? With these problems, let's take a detailed look at the use of steel buckle and matters needing attention.
First of all, steel buckle is mainly used in the transmission environment of inconvenient rubber conveyor belt replacement, difficult to disassemble and install equipment, short downtime, difficult installation of emergency conveyor belt repair, and short construction period. Therefore, the use of steel buckle greatly enriches the use of the conveyor belt scene and improves the production efficiency of the conveyor equipment. As long as there is a conveying place, there is no special requirement for the conveyor belt joint can be connected with steel buckle.
Bands that use steel buckles rarely have extra thin and extra thick bands, and most bands that use steel buckles are around 2-6mm thick. Steel buckle because of its convenient replacement, easy to modify, in many cases can be processed on site. In summary, there are two characteristics of the use of steel buckle industry. First, the conveyor belt is often replaced, and even the length needs to be adjusted. Second: the conveyor modification is difficult, need to do equipment maintenance in a short time.
Operation method of hot vulcanization joint for wire rope core heat resistant conveyor belt

Operation method of hot vulcanization joint for wire rope core heat resistant conveyor belt

Jan 29, 2023

01-292023

The product is suitable for metallurgy, cement, chemical industry under high temperature environment transportation. Mainly used for conveying sintered ore, coke and cement clinker and other high temperature solid materials.
1. First calculate the length of the tape, set the tensioning device in the smallest position, and then the tape begins to peel off the head. Joint Angle 16.7 degrees, 45 degrees with a knife to the wire position. Remove the edge glue from both sides to expose the wire. From the corner to cover the glue, the width of about 300mm.
2. Cut the knife at the stripping line with a knife at an Angle of 30-45 degrees to the wire rope below the groove.
3. Peel off the adhesive layer along the cut end with a hand saw and knife.
4. After part of the cover glue is peeled off, use the fixture to hold the peeled end part and speed up the stripping with the traction hook.
5. During the stripping process, do not drop water, oil and other dirt on the stripped wire rope.
6. When stripping the rope, if the original core glue is not well adhered to the wire rope, the joint should be completely stripped of the bad core glue.
7. Use the beater to polish the groove, and polish the 30mm belt surface near the groove, pay attention not to burn.
8. Cutting glue: cutting covering glue and adhesive core glue according to size requirements.
9. Film composite: the core glue and the surface of the covering glue are cleaned with glue, and the two cleaned surfaces are relatively composite after drying.
10 the joint vulcanizing machine four base beam equal distance put flat, placed width to be equal to or less than the width of the water pressure plate, the bottom beam end according to the vulcanizing machine 70 degrees Angle mutually placed.
11. Place the water pressure plate on the beam, then place the heat shield on the water pressure plate, then place the heating plate on the heat shield, and finally place the upper light plate on the heating plate.
12. If more than one curing machine is used for curing, 200×0.8 copper or iron sheet should be placed at the joint of the heating plate.
13. According to the center line and center point drawn in advance, straighten the two belt ends and put them flat to be fixed.
14. Swing from the center to both sides, insert the wire rope into the lap joint with each other, fill the lap joint and butt end with vulcanized core glue, and fix the wire rope head firmly. The wire rope must be arranged neatly and straight to avoid incorrect lap joint.
15. In each bonding process, it is necessary to roll or other ways to fully press firmly.
16. Trim the raw glue of the joint according to the size of the original tape.
17. The wire rope with both edges must be fully bonded.
18. Stick top glue on both sides of the wire rope. If there is transverse reinforcement, lay 1 mm thick adhesive core glue (glue) on the core glue after laying transverse reinforcement, and finally cover the glue, the thickness is not lower than the original thickness of the conveyor belt.
19. Check whether the surface of the joint is flat before vulcanization, and choose the die strip correctly to the thickness and width of the core (the die strip is 1-2 mm thinner than the thickness of the strip).
20. Check the position of the joint on the vulcanization plate. Each longitudinal side of the heating plate should be at least 150 mm longer than the connecting part, and each lateral side should be at least 50 mm wider than the conveyor belt.
21. Place a light plate on the tape to be vulcanized, then a heating plate, and finally a heat shield.
22 vulcanization pressure is 1.5-2.0mpa, can give 0.5MPa pressure at the beginning, with the heating plate temperature rise, the pressure also gradually rise, the temperature is 50℃, the pressure is 0.5MPa; When the temperature is 80℃, the pressure is 0.75 MPa, and the temperature is 100℃. The rated pressure of 1.5MPa is given. When it rises to 145℃, the timing constant temperature is started. During the constant temperature process, the pressure must be kept above 1.5MPa. After the sulfuration time is reached, the cold die should be pressed below 70℃ before the water pressure can be removed to open the vulcanizing machine and the tape can be taken out.
23. Test of concentricity: after the belt is connected, the center of two conveyor belts should be in the same straight line.
Common cause analysis of cold adhesive joint failure of conveyor belt

Common cause analysis of cold adhesive joint failure of conveyor belt

Jan 19, 2023

01-192023

Cold adhesive conveyor belt bonding joint failure common reasons analysis: cold vulcanized conveyor belt bonding is one of the best joint methods in the normal temperature environment, but because the impact of the environment is relatively large, the technical requirements are relatively high, the conveyor belt bonding novice often bonding failure, the following analysis of the causes of failure, only to correct the error, it may be better to do the conveyor belt joint.
First, the conveyor belt bonding is not strong, the joint lap is always separated.
1, the joint step distribution is not reasonable, sometimes the joint is too thick cause joint failure.
2. The joint length is too short, the joint strength cannot reach or the belt bonding direction is wrong.
3. The surface of the conveyor belt is not polished properly. The surface of the belt is not roughened to expose the body, or the woven fabric layer is damaged by grinding. Also use appropriate cleaning agent cleaning decontamination, air until fully dry. The lap surface shall be a dry and coarse-intact braided fabric body.
4. The lap joint is not handled properly, and the inclined table of the adhesive tape joint is not completely fitted, resulting in warping phenomenon.
5, the glue is not uniform. The edge seam is inadequately glued. Apply a short and hard brush on the fully dry adhesive surface three times in one direction evenly brush the adhesive, the adhesive layer should be even and not too thick.
6, after the glue is not fully dry to dry (that is, after volatilization of the solvent, to not adhere to the back of the fingers and have a sense of adhesion), resulting in the film inside the solvent is not fully volatilized, affecting the quality of bonding. In general, three times of gel is recommended.
7. After gluing, the joint surface is not protected, so that the adhesive film is polluted and loses activity, resulting in insufficient bonding strength. After bonding, repeated hammering and pressure were not carried out on the joint side seam.
8. The standing curing time is not enough. After the adhesion of the conveyor belt at room temperature static curing 2~4 hours, you can run. If conditions allow to extend the curing time, the optimal curing strength is achieved after 24 hours. Generally, the lower the temperature, the longer the standing curing time.
Ii. Cause analysis of bubbling of conveyor belt joint
1. The production of conveyor belt joints is unreasonable or the alignment of the lap surface is incorrect, resulting in air left between the adhesive films. After the two lap joints are made, they should be overlapped together, and their dimensional precision should be checked. There should be no gap between the steps, and the two step lap joints should be quasi-fit.
2, the thickness of the glue is not uniform, the thin glue layer is dry first, the thick solvent is not volatilized, and the initial adhesive strength is not formed, resulting in virtual adhesive.
3, after the adhesion of air hammering uneven, should be from the middle to the four sides of intensive hammering 2-3 times, exhaust the air between the lap surface.
Through the above analysis, I believe that my friends must find the cause of the failure of conveyor belt bonding, and correct it quickly in the future belt bonding work.
Large dip Angle conveyor installation, test run and commissioning

Large dip Angle conveyor installation, test run and commissioning

Jan 19, 2023

01-192023

(1) Installation
1, before installation should be familiar with the conveyor drawings, according to the acceptance rules of the acceptance of the components of the whole machine.
2. Familiar with the implementation of technical requirements related to installation in the Code for Construction and Acceptance of Mechanical Equipment Installation Engineering.
3. Installation sequence:
Generally, it is: draw the center line -- install the frame (head frame -- tail frame -- support leg -- middle frame), install the roller -- install the wave guard belt -- install the electric roller -- install the reversing roller -- install the pressure belt wheel -- install the roller set -- install the tensioning device -- install the funnel, guard, guide groove, etc.
4. Installation precautions:
(1) All rollers and idlers should be flexible after installation without stuck phenomenon.
(2) The center line of the conveyor frame should coincide with the longitudinal center line of the conveyor, allowing a deviation of less than 3mm, and ensure that the straightness within any 25m length is 5mm.
(3) The parallelism between the drum axis and the horizontal plane is 1/1000 of the length of the drum axis.
(4) The perpendicularity of the roller axis to the center line of the conveyor frame is 2/1000 of the length of the roller axis. The symmetry of the roller and roller center line to the center line of the conveyor frame is 3.0mm.
5. After the cleaner is installed, the contact length between the scraper and the conveyor belt on the axis of the roller shall not be less than 85%.
(II) Test run:
1, before the formal put into use, should carry out 2 hours no-load and 8 hours load test run, before the test run in addition to the general check whether the installation of the conveyor meets the installation technical requirements, still need to check:
(1) Add lubricating oil in the electric roller according to the regulations
(2) Whether the installation direction of the reverse check is consistent with the reverse check direction.
(3) Installation of cleaner, electric drum group, reversing drum group, etc.
(4) Electrical signal and control device layout and wiring correctness.
(5) Point the driving drum and observe whether the direction of rotation of the drum is correct.
2. The following work should be carried out during the test run:
(1), check the conveyor running parts should have no obvious noise.
(2) Each bearing has no abnormal temperature rise.
(3) Check the rotation and fastening of each roller and supporting roller.
(4) The cleaning effect of the cleaner.
(5) tightness of conveyor belt.
(6) All electrical equipment buttons should be sensitive and reliable.
(III) Adjustment:
(1) When the conveyor belt at the head goes off, adjust the electric roller at the head. The direction is shown as follows. After the adjustment, weld the positioning block at the bearing seat.
(2) Deviation of conveyor belt at the tail: adjust the tail to the drum or spiral tensioning device, and weld the positioning block at the bearing seat after adjusting its direction as shown in the following figure.
(3) In the central conveyor belt deviation:
Adjust the upper idlers (for the upper branch) and the lower idlers (for the lower branch), and their adjustment directions are shown as follows. If adjusting one set of idlers is still insufficient to correct, several sets of idlers can be adjusted continuously, but the skew of each set should not be too large.
(4) The surface of the drum is bonded with materials, so that the drum becomes a conical surface, which will cause the tape to deviate to one side, causing the tape to run off. Therefore, it is necessary to check the cleaner and manual cleaning frequently.
(5) Once the belt is loaded, it will run off. This situation is generally due to the fact that the blanking point of the material is not in the middle of the belt. The blanking point position should be adjusted.
(6) When the height of both sides of the frame is not the same, the belt is not level. When running, the belt moves to the lower side, resulting in deviation. At this time, the frame must be rewelded or the idler set must be padded with gaskets.
(7) When the belt is unloaded, the empty car will run off, and the material can be corrected. This phenomenon is generally caused by too much initial tension, and the appropriate adjustment can be made.
(8) Adjust the pretension of the conveyor belt, so that when the conveyor belt starts and runs with full load, there will be no skid between the conveyor belt and electric roller.
Advantages and disadvantages of large dip Angle conveyor driving system

Advantages and disadvantages of large dip Angle conveyor driving system

Jan 18, 2023

01-182023

The electric drive technology of large dip Angle belt conveyor has experienced the development process from AC to DC and then to AC. Due to the advantages and disadvantages of DC drag and AC drag, and by the transmission capacity and investment capital and other aspects of the influence of various factors, so in the modern mine conveying equipment, the use of DC drag and AC drag of the large Angle belt machine are used.
For the large dip Angle belt conveyor, in the transport of minerals or materials, equipment, personnel, because the steel wire rope in the drum non-stop winding and loose rope, and the change of the large dip Angle belt conveyor load, the change of moment of inertia is more obvious.
The disadvantages of large dip Angle belt conveyor are:
1, must have a special frequency conversion power supply;
2, in the constant torque speed regulation, the overload multiple of the low-speed motor is reduced;
3. High harmonics have an impact on the power grid, which needs to be mitigated by compensating measures such as filters. Screening equipment
This kind of drag system of large dip Angle belt conveyor has the following advantages:
1, the conveying capacity is almost unrestricted, the maximum can reach l0000kw, the conveying speed can reach more than 20m/s, the conveying height is more than 1200m, the drum diameter up to 6.5m, which is difficult to reach the DC system;
2, no commutator and carbon brush this weak link, to ensure the reliable operation of the motor and reduce the operation consumption;
3, high power factor, up to 0.9 1, greatly saving energy;
4, the dynamic quality is good (and DC system is the same), the system can be in the four quadrants smooth transition and stepless speed regulation;
5. Due to good mechanical characteristics, the starting torque is large.
6, synchronous machine price and non-ferrous metal consumption is lower than DC machine;
7, wide speed range. Therefore, most experts believe that the variable frequency synchronous machine drive speed regulation system is the inevitable development direction of large dip Angle belt conveyor.
Safety operation and maintenance of belt conveyor with large dip Angle fender

Safety operation and maintenance of belt conveyor with large dip Angle fender

Jan 18, 2023

01-182023

Whether the belt conveyor can run normally for a long time is directly related to whether it can be operated correctly and safely and whether it can be maintained regularly.
(I) Safe operation:
(1) The blanking height should be reduced as far as possible and the impact of materials on the conveyor belt should be reduced so as not to damage the conveyor belt.
(2) The factors causing deviation must be eliminated in time.
(3) Adhere to the maintenance system to avoid man-machine accidents.
(4) No-load start or stop, strictly follow the order of operation rules.
(5) Make equipment use and maintenance records, and make shift handover work well.
(II) Maintenance:
1. Maintenance Contents:
(1) Check whether the joint of the belt has any abnormal conditions, such as cuts, cracks and other damage caused by other reasons.
(2) Whether there is wear on the upper and lower rubber of the belt, and whether the guard belt is worn.
(3) Check whether the rubber scraping board of the cleaning device is seriously worn and cannot be in close contact with the belt. If so, the rubber scraping board should be adjusted or replaced.
(4) Keep the rotation of each roller flexible, replace the roller that does not turn or is damaged,
(5) Prevent the tape from running off and keep the tape running on the center line.
2. Regular maintenance
(1) Oil all kinds of bearings regularly
(2) Re-tighten all anchor bolts and beam connecting bolts.
(3) Repair or replace other worn parts or components.
(4) Repair or replace the tape.
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