Rubber belt replacement method for coal mine rubber belt conveyor

Abstract

The invention provides a method for replacing a rubber belt of a coal mine rubber belt conveyor, which relates to the technical field of coal mine mechanical equipment maintenance, and comprises the following steps of: S1, spreading a new rubber belt at a preset position beside the rubber belt conveyor, and fixing a connecting end of the new rubber belt and an old rubber belt; s2, the new rubber belt is dragged to rotate around the conveyor along the conveying track through the old rubber belt operation power, and the new rubber belt is unfolded; s3, the head and the tail of the new rubber belt are connected, and a closed-loop conveying belt is formed; s4, the old adhesive tape is pulled forwards through the new adhesive tape, and the old adhesive tape is recycled in cooperation with a traction device; through the orderly process design of placing the old tape and the new tape and recycling the old tape from the new tape, manual intervention and invalid operation in the adhesive tape replacement process are greatly reduced, the adhesive tape replacement time is remarkably shortened, the replacement efficiency is improved, the influence of adhesive tape replacement operation on the coal mine production progress is effectively reduced, and the coal mine production efficiency is improved. And the continuity of coal mine production is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine mechanical equipment maintenance, in particular to a method for replacing a belt of a coal mine belt conveyor. Background Art

[0002] In coal mining operations, belt conveyors are key equipment for coal transportation. Due to long-term operation under heavy loads and complex working conditions, belts are subject to frequent wear and aging problems and need to be replaced regularly. At present, most methods of replacing the belt of coal mine belt conveyors have the disadvantages of low efficiency, high cost, and great safety hazards. Some traditional methods rely on a large number of manual segmented disassembly and assembly of the belt, which not only consumes a lot of manpower and material resources, but also the replacement process is time-consuming, seriously affecting the normal production progress of the coal mine; some use equipment-assisted replacement technology, which lacks systematic planning in the belt release and recovery links, resulting in difficulty in connecting the old and new belts, cumbersome replacement procedures, and easy to cause safety accidents such as belt breakage and equipment failure during operation. Therefore, the present invention proposes a method for replacing the belt of a coal mine belt conveyor to solve the problems existing in the prior art. Summary of the Invention

[0003] In response to the above problems, the present invention proposes a method for replacing the belt of a coal mine belt conveyor. The method for replacing the belt of a coal mine belt conveyor is designed with an orderly process of releasing the old belt with a new belt and recycling the old belt with a new belt. This greatly reduces the manual intervention and invalid operations in the belt replacement process, significantly shortens the belt replacement time, improves the replacement efficiency, effectively reduces the impact of the belt replacement operation on the coal mine production progress, and ensures the continuity of coal mine production.

[0004] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a method for replacing a belt of a coal mine belt conveyor, comprising the following steps: S1: Place the new tape at a preset position next to the belt conveyor and fix the connection between the new tape and the old tape; S2: The new belt is pulled by the running power of the old belt and rotates along the conveyor track around the conveyor to complete the unwinding of the new belt; S3: Connect the ends of the new belt to form a closed-loop conveyor belt; S4: Use the new tape to pull the old tape forward, and cooperate with the traction device to recycle the old tape.

[0005] A further improvement is that: S1 includes the following steps: Place the new tape in a suitable position next to the belt conveyor in advance to ensure that there are no problems with the new tape; Remove the tape head from the unfolded new tape and use a splint to firmly secure the new tape head to the old tape.

[0006] Further improvements are: the tensile strength of the splint is not less than 1.5 times the maximum tensile force of the tape during operation, and the connecting surface is provided with anti-slip grooves or an adhesion-enhancing coating.

[0007] A further improvement is that: said S2 comprises the following steps: Adjust the running speed of the belt conveyor to the slow gear and start the belt conveyor; The running power of the old belt is used to drive the new belt, so that the new belt rotates around the belt conveyor along the running track of the belt conveyor for one circle.

[0008] Further improvements include: during the operation of the belt conveyor, real-time monitoring of the running status of the belt, observing whether the connection between the new and old belts is loose, and observing whether the belt is deviating. When it is detected that the tension fluctuation exceeds the threshold or the lateral offset is ≥5% of the bandwidth, the belt conveyor is immediately stopped and adjusted.

[0009] A further improvement is that: S3 includes the following steps: When the new belt rotates around the belt conveyor for one circle, stop the belt conveyor; Connect the ends of the new belt together, using either vulcanization or mechanical joints.

[0010] Further improvements are: when vulcanization connection is adopted, the heating temperature is controlled at 145℃-160℃, the pressurization pressure is 0.8-1.8MPa, and the vulcanization time is 3.0 times the thickness of the belt to ensure that the connection parts are fully vulcanized to form a firm and sealed connection; when mechanical joints are adopted, at least two-level stepped meshing structures are used, and the meshing surfaces are embedded with high-strength fiber reinforcement layers, so that the end-to-end connection of the new belt can meet the requirements of normal operation of the belt conveyor.

[0011] A further improvement is that: said S4 includes the following steps: Cut off the old belt at the appropriate position, take out the old belt head and connect it to the traction device; Adjust the belt conveyor to slow speed again, start the belt conveyor, and start the traction device at the same time. Use the new belt to drive the old belt, and the traction device will gradually recycle the old belt. After all old belts have been recycled, the belt conveyor and traction device are stopped and the relevant connections are removed.

[0012] Further improvements include: synchronously recovering the old tape at a speed of 0.5-1.5m / s through a traction device, dynamically adjusting the traction force within the range of 30%-70% of the tape's tensile strength, and forming a closed-loop control with the belt conveyor's operating speed.

[0013] A further improvement is that the traction device is a winch or a hydraulic hoist, and the connection piece between the traction device and the old tape is an anti-tripping type clamp, which includes a self-locking wedge structure and a tension sensor.

[0014] The beneficial effects of the present invention are: 1. The present invention greatly reduces manual intervention and invalid operations in the tape replacement process through the orderly process design of putting new tape on old tape and recycling old tape on new tape, significantly shortens the tape replacement time, improves the replacement efficiency, effectively reduces the impact of the tape replacement operation on the coal mine production progress, and ensures the continuity of coal mine production.

[0015] 2. The present invention reduces the high-intensity and high-risk operation links of direct manual participation in tape replacement. At the same time, through real-time monitoring of the tape operation status and precise control of equipment operating parameters, it can timely discover and deal with potential safety hazards, reduce the probability of safety accidents, and effectively ensure the personal safety of workers and the safe and stable operation of equipment.

[0016] 3. The present invention reduces labor costs and equipment downtime costs, and in the process of connecting and recycling the old and new belts, through reasonable operation and equipment utilization, it reduces material losses such as belt damage, thereby effectively reducing the overall cost of replacing the coal mine belt conveyor belt and improving the economic benefits of coal mine production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Flowchart of the present invention. DETAILED DESCRIPTION

[0018] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0019] Example 1 according to Figure 1 As shown, this embodiment proposes a method for replacing a belt of a coal mine belt conveyor, comprising the following steps: Preliminary preparation and connection between the old and new belts Lay out the new tape in a suitable location next to the conveyor in advance to ensure it is free of entanglement, damage, or other issues. Remove the tape head from the laid-out new tape and securely fasten the new tape head to the old tape using a splint. The splint must be strong enough to withstand the tension of the tape during operation, ensuring a secure connection between the new and old tapes to prevent them from falling off during subsequent operation.

[0020] Operation of putting old tape on new tape Set the belt conveyor to slow speed and start the conveyor. Use the power of the old belt to drive the new belt, causing it to rotate along the conveyor's track and around the conveyor for one full revolution. During this process, professional personnel will monitor the belt's operation in real time, focusing on loose connections between the old and new belts and any belt deviation. If any anomalies are detected, the conveyor will be stopped immediately and adjustments will be made to ensure the new belt can smoothly and completely complete its rotation around the conveyor, completing the unwinding operation.

[0021] New belt end to end connection After the new belt has completed one rotation around the conveyor, stop the conveyor and connect the ends of the new belt. Depending on your needs, you can choose between vulcanization or mechanical splicing. If vulcanization is used, the connection points must be heated and pressurized in strict accordance with the vulcanization process to ensure sufficient vulcanization and a secure, airtight connection. If mechanical splicing is used, ensure the splice components are accurately installed and securely fastened to ensure the new belt has sufficient strength and stability after connection, meeting the requirements for normal operation of the conveyor.

[0022] New belt, old belt, recycling old belt Disconnect the old belt at the appropriate location, remove the old belt head and reliably connect it to the winch. Slow down the belt conveyor again, start the conveyor and the winch simultaneously. Use the new belt to drive the old belt, and gradually recycle the old belt at a stable and coordinated speed through the traction of the winch. During the recycling process, pay close attention to the winch tension and the belt conveyor speed, adjusting them according to actual conditions to avoid problems such as excessive tension causing belt breakage, or insufficient tension and uncoordinated speed causing recycling problems. Continue until all the old belts are recycled. Finally, stop the conveyor and winch, and remove the relevant connecting devices.

[0023] Example 2 according to Figure 1 As shown, this embodiment proposes a method for replacing a belt of a coal mine belt conveyor, comprising the following steps: Taking the belt replacement operation of the belt conveyor model DTL120 / 120 / 2×1000 as an example, the new belt model is: ST / S3500N / mm.

[0024] Before replacing the belt, lay out new, standard-fitting belt in a flat, spacious area next to the conveyor lane. Carefully inspect the new belt for scratches, cracks, and other surface defects. Remove the new belt's head and secure it to the old belt using a high-strength metal clamp. Ensure the clamp bolts are tightened for a tight connection. To limit the new belt's left-right movement and ensure smooth operation, fabricate a belt unwinding bracket using belt rollers.

[0025] Set the belt conveyor's control switch to slow mode and start the conveyor (note that the tail tensioner must be adjusted before each start to ensure smooth belt operation). The old belt will begin to slowly rotate, pulling the new belt around the conveyor. Four personnel will monitor the conveyor's operation from the nose, middle, tail, and leading positions. They will communicate via intercom every five minutes to provide feedback on the belt's status. Stop the conveyor when the new belt completes one full rotation.

[0026] The new belt is connected by vulcanization. First, the joint is polished to remove surface impurities. After the joint is completed, a suitable location is selected for the vulcanization platform. The joint is then placed on the platform and coated with a special vulcanizing adhesive. The core and cover rubber is then covered with vulcanizing adhesive. The upper vulcanizing plate is then applied. Vulcanization is performed at the set temperature (145°C), pressure (1.5MPa), and time (3.0 times the belt thickness in minutes). After vulcanization is complete, the belt is allowed to cool naturally to room temperature (below 70°C). The vulcanization quality of the joint is then inspected to ensure a secure connection.

[0027] Disconnect the old belt 10 meters away from the machine head, take out the old belt head and connect it to the electric winch installed near the machine head. Adjust the belt conveyor to slow speed again, start the belt conveyor and electric winch, and recycle the old belt at a speed of 0.5m / s. When recycling the old belt, you can also use the belt roller to process the belt-taking rack to ensure the smooth operation of the old belt. During the recycling process, adjust the pulling force of the electric winch in real time according to the operation of the belt to ensure the smooth recycling of the old belt. When all the old belts are recycled, stop the belt conveyor and electric winch, remove the splints and connecting ropes, restore the various safety equipment and facilities of the belt conveyor, and conduct a final inspection and debugging of the newly replaced belt to ensure the normal operation of the belt conveyor.

[0028] With innovative operating procedures and scientific control methods, efficient, safe and low-cost replacement of tapes is achieved, which has high practical value and broad prospects for promotion and application.

[0029] The method for replacing the belt of a coal mine belt conveyor is designed to release the old belt with the new belt and recycle the old belt with the new belt in an orderly process, which greatly reduces the manual intervention and invalid operation in the belt replacement process, significantly shortens the belt replacement time, improves the replacement efficiency, effectively reduces the impact of the belt replacement operation on the coal mine production progress, and ensures the continuity of coal mine production. In addition, the present invention reduces the high-intensity and high-risk operation links of manual direct participation in belt replacement. At the same time, through real-time monitoring of the belt operation status and precise control of equipment operating parameters, it can timely discover and deal with potential safety hazards, reduce the probability of safety accidents, and effectively ensure the personal safety of staff and the safe and stable operation of equipment. In addition, the present invention reduces labor costs and equipment downtime costs, and in the process of connecting and recycling the old and new belts, through reasonable operation and equipment utilization, reduces material losses such as belt damage, thereby effectively reducing the overall cost of replacing the coal mine belt conveyor belt and improving the economic benefits of coal mine production.

[0030] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for replacing a belt of a coal mine belt conveyor, characterized in that: The following steps are involved: S1: Place the new tape at a preset position next to the belt conveyor and fix the connection between the new tape and the old tape; S2: The new belt is pulled by the running power of the old belt and rotates along the conveyor track around the conveyor to complete the unwinding of the new belt; S3: Connect the ends of the new belt to form a closed-loop conveyor belt; S4: Use the new tape to pull the old tape forward, and cooperate with the traction device to recycle the old tape.

2. A method for replacing a belt of a coal mine belt conveyor according to claim 1, characterized in that: Said S1 comprises the following steps: Place the new tape in a suitable position next to the belt conveyor in advance to ensure that there are no problems with the new tape; Remove the tape head from the unfolded new tape and use a splint to firmly secure the new tape head to the old tape.

3. A method for replacing a belt of a coal mine belt conveyor according to claim 2, characterized in that: The tensile strength of the splint shall not be less than 1.5 times the maximum tensile force of the tape during operation, and the connecting surface shall be provided with anti-slip grooves or adhesion-enhancing coating.

4. A method for replacing a belt of a coal mine belt conveyor according to claim 1, characterized in that: The S2 comprises the following steps: Adjust the running speed of the belt conveyor to the slow gear and start the belt conveyor; The running power of the old belt is used to drive the new belt, so that the new belt rotates around the belt conveyor along the running track of the belt conveyor for one circle.

5. A method for replacing a belt of a coal mine belt conveyor according to claim 4, characterized in that: During the operation of the belt conveyor, monitor the running status of the belt in real time, observe whether the connection between the new and old belts is loose, and observe whether the belt is deviating. When it is detected that the tension fluctuation exceeds the threshold or the lateral offset is ≥5% of the bandwidth, stop the belt conveyor immediately and make adjustments.

6. A method for replacing a belt of a coal mine belt conveyor according to claim 1, characterized in that: The S3 includes the following steps: When the new belt rotates around the belt conveyor for one circle, stop the belt conveyor; Connect the ends of the new belt together, using either vulcanization or mechanical joints.

7. A method for replacing a belt of a coal mine belt conveyor according to claim 6, characterized in that: When vulcanization connection is adopted, the heating temperature should be controlled at 145℃-160℃, the pressurization pressure should be 0.8-1.8MPa, and the vulcanization time should be 3.0 times of the belt thickness to ensure that the connection parts are fully vulcanized to form a firm and sealed connection; when mechanical joints are adopted, at least two-level stepped meshing structures should be used, and the meshing surfaces should be embedded with high-strength fiber reinforcement layers to ensure that the end-to-end connection of the new belt can meet the requirements for normal operation of the belt conveyor.

8. The method for replacing a belt of a coal mine belt conveyor according to claim 1, wherein: The S4 comprises the following steps: Cut off the old belt at the appropriate position, take out the old belt head and connect it to the traction device; Adjust the belt conveyor to slow speed again, start the belt conveyor, and start the traction device at the same time. Use the new belt to drive the old belt, and the traction device will gradually recycle the old belt. After all old belts have been recycled, the belt conveyor and traction device are stopped and the relevant connections are removed.

9. A method for replacing a belt of a coal mine belt conveyor according to claim 8, characterized in that: The old tape is synchronously recovered through the traction device at a speed of 0.5-1.5m / s. The dynamic adjustment range of the traction force is 30%-70% of the tensile strength of the tape, and a closed-loop control is formed with the running speed of the belt conveyor.

10. A method for replacing a belt of a coal mine belt conveyor according to claim 9, characterized in that: The traction device is a winch or a hydraulic hoist, and the connection piece between the winch and the old tape is an anti-tripping type clamp, which includes a self-locking wedge structure and a tension sensor.

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