Hydraulically-driven self-adaptive anti-slip belt clamping device and method

Abstract

The invention belongs to the technical field of belt replacement of belt conveyors, and particularly relates to a hydraulically-driven self-adaptive anti-slip belt clamping device and method.A conveying belt of the device moves on a first set of carrier rollers and a second set of carrier rollers, and a clamping device is located between the first set of carrier rollers and the second set of carrier rollers and fixed to the ground; the front end of the clamping device is connected with a friction wheel through a supporting frame, the friction wheel makes contact with the conveying belt, and an explosion-proof high-precision photoelectric encoder is fixedly connected to the friction wheel and used for detecting the running speed of the conveying belt. The fixed clamping unit on the upper portion of the clamping device is located above the conveying belt, the movable clamping unit on the lower portion of the clamping device is driven by the hydraulic driving device and used for being matched with the fixed clamping unit to clamp the conveying belt, and the hydraulic driving device is connected with a wheel shaft of the friction wheel. Automatic detection and clamping control over the conveying belt in the belt replacing process are achieved, and the safety and the automation level of belt replacing operation are effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of belt replacement technology for belt conveyors, specifically relating to a hydraulically driven adaptive anti-slip belt clamping device and method. Background Technology

[0002] In the maintenance of belt conveyors, the regular replacement of the conveyor belt is a crucial link in ensuring the continuous and safe operation of the system. However, during the belt replacement process, the connection between the old and new belts, the release and rebuilding of tension, and the disengagement of the drive rollers often lead to an unstable stress state for the conveyor belt, making it prone to "slippage." This unexpected movement can not only damage the conveyor belt itself and surrounding equipment, but also poses a serious threat to the personal safety of on-site operators, becoming a prominent problem affecting the safety and efficiency of belt replacement operations. Existing belt replacement devices mostly focus on clamping or traction functions, lacking real-time monitoring and rapid response capabilities for the conveyor belt's operating status, making it difficult to effectively predict and suppress slippage, and failing to meet the higher requirements of modern mining production for operational safety, efficiency, and mechanization. To address this situation, this invention aims to provide an integrated anti-slippage solution with detection and automatic control functions. By monitoring the conveyor belt speed in real time and intervening with instantaneous clamping, it fundamentally eliminates the safety risks caused by slippage during belt replacement. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a hydraulically driven adaptive anti-slip belt clamping device and method for real-time monitoring and automatic anti-slip control of the conveyor belt running speed during the belt changing process of a belt conveyor. The device can effectively identify and suppress abnormal slippage of the conveyor belt, and improve the safety, continuity and mechanization of the belt changing operation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a hydraulically driven adaptive anti-slip belt clamping device, comprising: a first set of idlers, a second set of idlers, a hydraulic drive device, a clamping device, and a conveyor belt; the first set of idlers and the second set of idlers are fixed on both sides of the ground, the conveyor belt moves on the first set of idlers and the second set of idlers, the clamping device is located in the middle of the first set of idlers and the second set of idlers and is fixed on the ground, the front end of the clamping device is connected to a friction wheel through a support frame, the friction wheel contacts the conveyor belt, and an explosion-proof high-precision photoelectric encoder is fixedly connected to the friction wheel for detecting the running speed of the conveyor belt; the fixed clamping unit at the upper part of the clamping device is located above the conveyor belt, and the movable clamping unit at the lower part of the clamping device is driven by the hydraulic drive device for cooperating with the fixed clamping unit to clamp the conveyor belt, the hydraulic drive device being connected to the wheel axle of the friction wheel.

[0005] The clamping device includes a fixed clamping unit, a movable clamping unit, and a support frame. The support frame is fixed to the ground, and the fixed clamping unit and the movable clamping unit are located inside the support frame. The fixed clamping unit is fixedly connected to the upper part of the support frame, and the movable clamping unit is slidably connected to the lower part of the support frame.

[0006] A tension spring is provided in the middle of the support frame, and the tension spring is connected to the support frame.

[0007] The hydraulic drive device includes an oil tank, a hydraulic pump, a solenoid directional valve, an unloading valve, a check valve, a first hydraulic cylinder, and a second hydraulic cylinder. The first and second hydraulic cylinders are connected to both sides of the movable clamping unit. The oil tank is fixed to the top of the support frame. The oil tank is connected to the hydraulic pump fixed to the friction wheel through pipeline I. The hydraulic pump is connected to the first and second hydraulic cylinders through pipeline II. The oil tank is connected to the first and second hydraulic cylinders through pipeline III. The oil tank is connected to the first and second hydraulic cylinders through pipeline IV. Solenoid directional valves are installed on pipelines II and III. A check valve is also installed on pipeline II, located above the solenoid directional valve. An unloading valve is installed on pipeline IV.

[0008] A hydraulically driven adaptive anti-slip belt clamping method includes the following steps: The speed of the conveyor belt is detected in real time by an explosion-proof high-precision photoelectric encoder on the friction wheel. When the conveyor belt speed is detected to be lower than the set threshold, the solenoid directional valve is in the left position, the first and second hydraulic cylinders are in a low-position stationary state and do not clamp the conveyor belt. The solenoid directional valve switches to the right position, and the high-pressure oil pumped by the hydraulic pump returns to the oil tank through pipeline III. When the conveyor belt speed is detected to exceed the set threshold, the solenoid directional valve switches to the left position, the check valve opens, and the unloading valve is in the left-position closed state. The high-pressure oil output by the hydraulic pump enters the first and second hydraulic cylinders through pipeline II, pushing the moving clamping unit to move upward and cooperate with the fixed clamping unit to clamp the conveyor belt. When the conveyor belt speed drops to zero, the solenoid directional valve resets to the right position, the check valve closes the oil circuit, and the clamping state is maintained. After the fault is cleared, the unloading valve switches to the right position, and the hydraulic oil flows back to the oil tank through pipeline IV under the weight of the moving clamping unit, and the system resets.

[0009] The beneficial effects of this invention are as follows: This invention monitors the conveyor belt speed in real time using a friction wheel and an explosion-proof high-precision photoelectric encoder; it also includes a hydraulic drive device and a clamping device. When an abnormal increase in conveyor belt speed is detected, the system automatically triggers the hydraulic drive clamping device to clamp the conveyor belt and prevent slippage; after the fault is cleared, the system automatically unloads and resets. This invention achieves automatic detection and clamping control of the conveyor belt during belt changing, effectively improving the safety and automation level of belt changing operations. Attached Figure Description

[0010] Figure 1This is a three-dimensional structural diagram of a hydraulically driven adaptive anti-slip belt clamping device according to the present invention; Figure 2 This is a top view of a hydraulically driven adaptive anti-slip belt clamping device according to the present invention; Figure 3 This is a side view of a hydraulically driven adaptive anti-slip belt clamping device according to the present invention; Figure 4 This is a partial schematic diagram of a hydraulically driven adaptive anti-slip belt clamping device according to the present invention; Figure 5 This is a schematic diagram of the clamping device of a hydraulically driven adaptive anti-slip belt clamping device according to the present invention; Figure 6 This is a schematic diagram of the friction wheel connection of a hydraulically driven adaptive anti-slip belt clamping device according to the present invention; Figure 7 This is a structural diagram of the hydraulic system of a hydraulically driven adaptive anti-slip belt clamping device according to the present invention; Explanation of reference numerals in the attached figures 1. First set of idlers; 2. Friction wheel; 3. Hydraulic drive device; 301. Oil tank; 302. Hydraulic pump; 303. Check valve; 304. Solenoid directional valve; 305. Unloading valve; 306. Valve block; 307. First hydraulic cylinder; 308. Second hydraulic cylinder; 309. Pipeline I; 310. Pipeline II; 311. Pipeline III; 312. Pipeline IV; 4. Clamping device; 401. Support frame; 402. Fixed clamping unit; 403. Moving clamping unit; 5. Conveyor belt; 6. Ground; 7. Second set of idlers; 8. Support frame; 9. Tension spring; 10. Explosion-proof high-precision photoelectric encoder. Detailed Implementation

[0011] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0012] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "rear," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing these embodiments and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0013] Please see Figures 1 to 7As shown, a hydraulically driven adaptive anti-slip belt clamping device includes: a first set of idlers 1, a second set of idlers 7, a hydraulic drive device 3, a clamping device 4, and a conveyor belt 5; the first set of idlers 1 and the second set of idlers 7 are fixed on both sides of the ground 6, and the conveyor belt 5 moves on the first set of idlers 1 and the second set of idlers 7; the clamping device 4 is located in the middle of the first set of idlers 1 and the second set of idlers 7 and is fixed on the ground 6; the front end of the clamping device 4 is connected to a friction wheel 2 through a support frame 8; the friction wheel 2 contacts the conveyor belt 5; a tension spring 9 is provided in the middle of the support frame 8 and is connected to the clamping device 4; an explosion-proof high-precision photoelectric encoder 10 is fixedly connected to the left side of the friction wheel 2 for detecting the running speed of the conveyor belt 5; the fixed clamping unit 402 at the upper part of the clamping device 4 is located above the conveyor belt 5; the movable clamping unit 403 at the lower part of the clamping device 4 is driven by the hydraulic drive device 3 and is used to cooperate with the fixed clamping unit 402 to clamp the conveyor belt 5; the hydraulic drive device 3 is connected to the wheel axle of the friction wheel 2.

[0014] In this embodiment, the first set of idlers 1 is fixedly connected to the left side of the ground 6, and the second set of idlers 7 is fixedly connected to the right side of the ground 6, so as to realize the stable operation of the conveyor belt 5. The friction wheel 2 is movably installed in the middle below the support frame 8, which converts the linear motion of the conveyor belt 5 into rotational motion and provides a power source for the hydraulic pump 302 of the hydraulic drive device 3. The tension spring 9 is used to tighten the support frame 8 so that the friction wheel 2 fits against the conveyor belt 5.

[0015] In this embodiment, the explosion-proof high-precision photoelectric encoder 10 on the friction wheel 2 is used to detect the running speed of the conveyor belt 5. According to the information of the explosion-proof high-precision photoelectric encoder 10, the hydraulic drive device 3 moves to control the moving clamping unit 403 to move upward and cooperate with the fixed clamping unit 402 to clamp the conveyor belt 5, thereby realizing the clamping and stopping of the conveyor belt 5.

[0016] The clamping device 4 includes a fixed clamping unit 402, a movable clamping unit 403, and a support frame 401. The support frame 401 is fixed on the ground 6. The fixed clamping unit 402 and the movable clamping unit 403 are located inside the support frame 401. The fixed clamping unit 402 is fixedly connected to the upper part of the support frame 401, and the movable clamping unit 403 is slidably connected to the lower part of the support frame 401. The tension spring 9 is connected to the support frame 401.

[0017] In this embodiment, the support frame 401 is fixedly connected to the ground by anchor screws, serving to support the fixed clamping unit 402, the movable clamping unit 403, and connect other components.

[0018] The hydraulic drive device 3 includes an oil tank 301, a hydraulic pump 302, a solenoid directional valve 304, an unloading valve 305, a check valve 303, a first hydraulic cylinder 307, and a second hydraulic cylinder 308. The first hydraulic cylinder 307 and the second hydraulic cylinder 308 are connected to both sides of the movable clamping unit 403. The oil tank 301 is fixed to the top of the support frame 401. The oil tank 301 is connected to the hydraulic pump 302, which is fixed to the friction wheel 2, through pipe I 309. The hydraulic pump 302 is connected to pipe II 31. 0 is connected to the first hydraulic cylinder 307 and the second hydraulic cylinder 308 respectively; the oil tank 301 is connected to the first hydraulic cylinder 307 and the second hydraulic cylinder 308 respectively through pipeline Ⅲ 311; the oil tank is connected to the first hydraulic cylinder and the second hydraulic cylinder respectively through pipeline Ⅳ 312; the pipeline Ⅱ 310 and the pipeline Ⅲ 311 are equipped with electromagnetic directional valves 304; the pipeline Ⅱ 310 is also equipped with a check valve 303, which is located above the electromagnetic directional valve 304; the pipeline Ⅳ 312 is equipped with an unloading valve 305.

[0019] In this embodiment, the electromagnetic directional valve 304, the check valve 303, and the unloading valve 305 are fixed above, to the left, and below the valve block 306, respectively. The valve block 306 is fixedly connected to the upper right side of the support frame 401, serving to integrate the hydraulic system and save space. The electromagnetic directional valve 304 controls the opening and closing and direction of the hydraulic oil circuit according to the detected conveyor belt speed signal. The unloading valve 305 is used to release the pressure in the hydraulic circuit after troubleshooting, so that the moving clamping unit 403 can be reset. The check valve 303 is used to prevent hydraulic oil backflow and maintain the pressure in the hydraulic cylinder. The oil tank 301 serves to supply oil to the hydraulic system. The hydraulic pump 302 is located to the right of the friction wheel and serves to provide power to the hydraulic system. The first hydraulic cylinder 307 is fixedly connected to the lower left side of the support frame 401 and to the left side of the moving clamping unit 403, and is the component responsible for performing the final action in the hydraulic circuit. The second hydraulic cylinder 308 is fixedly connected to the lower right side of the support frame 401 and to the right side of the moving clamping unit 403, and is the component responsible for performing the final action in the hydraulic circuit.

[0020] A hydraulically driven adaptive anti-slip belt clamping method includes the following steps: During belt changing, the conveyor belt moves on the first set of idlers 1 and the second set of idlers 7. The support frame 8 is tightened by the tension spring 9, thereby driving the friction wheel 2 to press against the conveyor belt 5. The conveyor belt 5 drives the friction wheel 2 to rotate, which in turn drives the hydraulic pump 302 to pump oil. The explosion-proof high-precision photoelectric encoder 10 attached to the friction wheel 2 detects whether the speed of the conveyor belt 5 is higher than 5 m / min. When the speed of the conveyor belt 5 is lower than 5 m / min, the electromagnetic reversing valve 304 is in a state of... When the conveyor belt 5 is in the right-hand closed position, the first hydraulic cylinder 307 and the second hydraulic cylinder 308 are in a low-position stationary state, not clamping the conveyor belt 5. The solenoid directional valve 304 switches to the right position, and the high-pressure oil pumped by the hydraulic pump 302 returns to the oil tank 301 through pipeline III 311. When the speed of the conveyor belt 5 is detected to be higher than 5 m / min, the solenoid directional valve 304 is in the left-hand open position, the check valve 303 is open, and the unloading valve 305 is in the left-hand closed position. At this time, the friction wheel 2 drives the hydraulic... Pump 302 pumps high-pressure oil through pipeline II 310 to the first hydraulic cylinder 307 and the second hydraulic cylinder 308, causing the first hydraulic cylinder 307 and the second hydraulic cylinder 308 to start working. This drives the moving clamping unit 403 to move upward, eventually cooperating with the fixed clamping unit 402 to clamp the conveyor belt 5. When the speed of the conveyor belt 5 is detected to be 0 m / min, the electromagnetic reversing valve 304 returns to the right position, and the one-way valve 303 closes the oil circuit to prevent high-pressure oil backflow. The first hydraulic cylinder 307 and the second hydraulic cylinder 308 then... The hydraulic circuit of the second hydraulic cylinder 308 is in a pressure-holding state, the clamping process stops, and the problem of belt slippage is investigated. After the problem of belt slippage is solved, the unloading valve 305 enters the right-hand open state, so that the high-pressure oil returns to the oil tank 301 through the pipeline IV 312 under the action of gravity of the moving clamping unit 403. This causes the first hydraulic cylinder 307 and the second hydraulic cylinder 308 to begin to descend. After the conveyor belt 5 is completely released, the unloading valve 305 is switched back to the left-hand closed state, the system is reset, and the conveyor belt 5 begins to move normally.

[0021] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the present invention should be covered within the scope of protection of the present invention.

Claims

1. A hydraulic drive self-adaptive anti-runaway belt clamping device, characterized in that, The utility model relates to a kind of high-speed conveying device, including: First group of rollers, second group of rollers, hydraulic drive device, clamping device, conveying belt; The first group of rollers, second group of rollers are fixed on the ground on both sides, and the conveying belt moves on the first group of rollers, second group of rollers, and the clamping device is located in the middle of the first group of rollers, second group of rollers and is fixed on the ground, the front end of the clamping device is connected with friction wheel through support frame, the friction wheel is in contact with the conveying belt, and the high-precision photoelectric encoder of explosion-proof type is fixedly connected on the friction wheel, for detecting the running speed of the conveying belt;The fixed clamping unit on the upper part of the clamping device is located above the conveying belt, and the movable clamping unit on the lower part of the clamping device is driven by the hydraulic drive device, for clamping the conveying belt with the fixed clamping unit, and the hydraulic drive device is connected with the axle of the friction wheel.

2. A hydraulic drive self-adaptive anti-runoff belt clamping device according to claim 1, characterized in that, The clamping device includes a fixed clamping unit, a movable clamping unit, and a support frame. The support frame is fixed on the ground. The fixed clamping unit and the movable clamping unit are located within the support frame. The fixed clamping unit is fixedly connected to the upper part of the support frame. The movable clamping unit is slidingly connected to the lower part of the support frame.

3. A hydraulic drive self-adaptive anti-runoff belt clamping device according to claim 2, characterized in that, A tension spring is provided in the middle of the support frame and connected to the support frame.

4. A hydraulic drive self-adaptive anti-runoff belt clamping device according to claim 1, characterized in that, The hydraulic drive device includes an oil tank, a hydraulic pump, an electromagnetic reversing valve, an unloading valve, a one-way valve, a first hydraulic cylinder, and a second hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder are connected to the two sides of the movable clamping unit. The oil tank is fixed on the top of the support frame. The oil tank is connected to the hydraulic pump fixed on the friction wheel through pipeline I. The hydraulic pump is connected to the first hydraulic cylinder and the second hydraulic cylinder through pipeline II. The oil tank is connected to the first hydraulic cylinder and the second hydraulic cylinder through pipeline III. The oil tank is connected to the first hydraulic cylinder and the second hydraulic cylinder through pipeline IV. The electromagnetic reversing valve is provided on pipeline II and pipeline III. The one-way valve is also provided on pipeline II, above the electromagnetic reversing valve. The unloading valve is provided on pipeline IV.

5. A hydraulic drive self-adapting anti-runout tape clamping method based on the hydraulic drive self-adapting anti-runout tape clamping device of any one of claims 1 to 4, characterized in that, The following steps are included: The speed of the conveying belt is detected in real time by the high-precision photoelectric encoder on the friction wheel. When the speed of the conveying belt is detected to be lower than the set threshold, the electromagnetic reversing valve is in the left position, the first hydraulic cylinder and the second hydraulic cylinder are in the low position and static state, and the conveying belt is not clamped. The electromagnetic reversing valve is switched to the right position, and the high-pressure oil pumped by the hydraulic pump returns to the oil tank through pipeline III. When the speed of the conveying belt is detected to exceed the set threshold, the electromagnetic reversing valve is switched to the left position, the one-way valve is opened, and the unloading valve is in the left closed state. The high-pressure oil output by the hydraulic pump enters the first hydraulic cylinder and the second hydraulic cylinder through pipeline II, pushing the movable clamping unit to move upward and clamping the conveying belt with the fixed clamping unit. When the speed of the conveying belt drops to zero, the electromagnetic reversing valve is reset to the right position, the one-way valve is locked, and the clamping state is maintained. After troubleshooting, the unloading valve is switched to the right position, and the hydraulic oil flows back to the oil tank through pipeline IV under the action of the weight of the movable clamping unit, and the system is reset.

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