Electric capturing device for belt conveyor
The electric gripper, which uses a combination of electronic triggering and guiding components, solves the problems of slow response and high maintenance of existing belt conveyor grippers, and achieves fast, stable and repeatable clamping function, thereby improving the safety and reliability of belt conveyors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XUZHOU TANGRONG MASCH TECH CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-04-17
AI Technical Summary
Existing mechanical capture devices for belt conveyors have slow response speeds and cannot be reused, while electric capture devices have complex structures and are prone to damaging the conveyor belt, resulting in insufficient safety and reliability.
The electric gripper, which is triggered by electronic control, uses a speed sensor to monitor changes in the rotational speed of the idler roller and combines it with an electric cylinder drive to achieve rapid clamping. It is equipped with a guide assembly and a correction roller to ensure stable clamping. The design is reusable and reduces maintenance costs.
It achieves rapid response, stable clamping, and reusability, improving the safety and reliability of belt conveyors and reducing equipment damage and maintenance costs.
Smart Images
Figure CN224132061U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of belt breakage catcher technology, specifically an electric catcher for belt conveyors. Background Technology
[0002] Belt conveyors are widely used for material transport in industries such as mining, ports, and power. However, during operation, the conveyor belt may break, slip, or experience sudden load changes, leading to uncontrolled slippage and equipment damage or even safety accidents. Traditional mechanical grippers mostly use purely mechanical triggering, resulting in slow response times and non-reusability. Existing electric grippers have complex structures, high maintenance costs, and are prone to conveyor belt damage due to uneven force during clamping. Therefore, there is an urgent need for a fast-responding, stable, and reusable electric gripping device. Utility Model Content
[0003] In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide an electric catcher for belt conveyors to improve the safety and reliability of belt conveyors.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] An electric grabber for a belt conveyor includes a base, an idler roller, and two grabbing units. A guide rail is fixedly mounted on the base, a slider is mounted on the guide rail, and a bearing seat is fixedly mounted on the slider. The idler roller's shaft is rotatably mounted in the bearing seat. The two grabbing units are symmetrically arranged on both sides of the idler roller. Each grabbing unit includes an upper clamping plate and a lower clamping plate. The upper clamping plate is fixed to the base. The lower clamping plates are parallel and spaced below the upper clamping plate. A guide assembly is mounted on the base, and the lower clamping plates are mounted on the guide assembly. The guide assembly is driven by the movement of the slider, which in turn drives the lower clamping plates to move closer to the upper clamping plate. The device also includes a drive unit. The drive unit includes a control box, an electric cylinder, a push block, and two transmission assemblies. The control box and the electric cylinder are fixed to the base, and the push block is fixed to the piston rod of the electric cylinder. The two transmission assemblies... The components are symmetrically arranged on both sides of the push block; the transmission assembly includes a transmission plate, a guide shaft, a spring, an L-shaped plate, and a speed sensor; a vertical shaft is fixedly installed in the middle of the transmission plate, and the vertical shaft is rotatably mounted on the base; a push groove is provided on the push block, and one end of the transmission plate is movably placed in the push groove; the L-shaped plate is fixed on the slider; the other end of the transmission plate abuts against the L-shaped plate; a guide hole is provided on the L-shaped plate to accommodate the guide shaft, and the guide shaft is slidably installed through the guide hole, with its end fixedly connected to the base; the axis of the guide shaft is parallel to the length direction of the guide rail; the spring is sleeved on the guide shaft, with one end abutting against the base and the other end abutting against the L-shaped plate; the speed sensor is fixed on the L-shaped plate and is used to monitor the speed change of the idler roller shaft; the electric cylinder and the speed sensor are electrically connected to the control box respectively.
[0006] Preferably, a traction rod is fixedly installed on the L-shaped plate; an elbow is fixedly installed on the end of the traction rod away from the L-shaped plate; and an anti-collision pad is fixedly installed on the elbow.
[0007] Preferably, the guiding assembly includes a bracket, guide rollers, a guide plate, a limiting roller, a vertical plate, and a push plate; the bracket is fixed to the base; the limiting rollers and guide rollers are rotatably mounted on the bracket; multiple guide rollers are configured; the axes of the multiple guide rollers are arranged parallel and spaced apart in the same plane, and the distance between the axes of the multiple guide rollers and the base in the vertical plane gradually increases; the multiple guide rollers are arranged obliquely on the bracket; the limiting rollers are placed above the guide rollers, and their axes are parallel to the axes of the guide rollers; the guide plate is placed between the guide rollers and the limiting rollers, with its lower end face rolling in contact with the guide rollers and its upper end face rolling in contact with the limiting rollers; the vertical plate is vertically fixed to the upper part of the guide plate; the lower clamping plate is fixed to the top of the vertical plate; the push plate is fixed to one side of the vertical plate; the lower part of the push plate is provided with a guide groove adapted to the rotating shaft of the idler roller, the opening of the guide groove is facing the base, and the rotating shaft of the idler roller is movably placed in the guide groove.
[0008] Preferably, the guide assembly further includes a positioning roller; the positioning roller is rotatably disposed on the top of the bracket; the positioning roller makes rolling contact with the side of the upright plate.
[0009] Preferably, a correction roller is rotatably mounted on the base.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0011] Rapid response and precise triggering: By monitoring the change in idler speed in real time through a speed sensor and combining it with an electric cylinder drive, the clamping action can be triggered quickly the moment the conveyor belt breaks, with a response time shorter than that of a mechanical structure.
[0012] Stable clamping and damage prevention design: Multiple guide rollers and limit rollers in the guide assembly ensure that the lower clamp moves upward in parallel, avoiding the conveyor belt from being skewed and pinched; anti-collision pads and spring buffer design reduce impact and extend equipment life.
[0013] Reusable and automatically reset: The electric cylinder and transmission plate work together to lock and release the slider. It can be reused after being manually reset by the traction rod, reducing maintenance costs.
[0014] Anti-deviation and smooth operation: The dual function of the correction roller and positioning roller prevents the conveyor belt from deviating, and the rolling contact design of the vertical plate further reduces shaking and improves overall stability. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;
[0017] Figure 3 This is a schematic diagram of the structure of the bracket in this utility model;
[0018] Figure 4 This is a schematic diagram of the guide plate in this utility model;
[0019] Figure 5 This is a schematic diagram of the drive unit in this utility model.
[0020] in:
[0021] 1. Base; 2. Lower clamping plate; 3. Upper clamping plate; 4. Idler roller; 5. Drive unit; 6. Push plate; 7. Guide rail; 8. Slider; 9. Guide groove; 10. Rotary shaft; 11. Guide assembly; 12. Bracket; 13. Guide roller; 14. Positioning roller; 15. Limiting roller; 16. Vertical plate; 17. Guide plate; 18. Electric cylinder; 19. Anti-collision pad; 20. Elbow; 21. Spring; 22. Speed sensor; 23. Guide shaft; 24. L-shaped plate; 25. Traction rod; 26. Transmission plate; 27. Vertical shaft; 28. Push block. Detailed Implementation
[0022] The present invention will be further described below with reference to the accompanying drawings.
[0023] like Figures 1 to 5As shown, an electric grabber for a belt conveyor includes a base 1, an idler roller 4, and two grabbing units. A guide rail 7 is fixedly mounted on the base 1, a slider 8 is mounted on the guide rail 7, and a bearing seat is fixedly mounted on the slider 8. The shaft 10 of the idler roller 4 is rotatably mounted in the bearing seat. The guide rail 7 is arranged parallel to the conveyor belt of the belt conveyor. The idler roller 4 is used to support the bottom of the upper section of the conveyor belt. The two grabbing units are symmetrically arranged on both sides of the idler roller 4. Each grabbing unit includes an upper clamping plate 3 and a lower clamping plate 2. The edge of the conveyor belt of the belt conveyor is located between the upper clamping plate 3 and the lower clamping plate 2. The area between plates 2; the upper clamping plate 3 is fixed on the base 1; the lower clamping plates 2 are arranged parallel to each other below the upper clamping plate 3, and when the belt conveyor is working normally, the conveyor belt does not contact the upper clamping plate 3 or the lower clamping plate 2; a guide assembly 11 is installed on the base 1, and the lower clamping plate 2 is installed on the guide assembly 11; the guide assembly 11 is connected to the slider 8; the movement of the slider 8 drives the guide assembly 11, thereby driving the lower clamping plate 2 to move closer to the upper clamping plate 3; it also includes a drive unit 5; the drive unit 5 includes a control box, an electric cylinder 18, a push block 28 and two transmission assemblies; control The control box is connected to a power source; the control box and electric cylinder 18 are fixed on the base 1, and the push block 28 is fixed on the piston rod of the electric cylinder 18; two transmission components are symmetrically arranged on both sides of the push block 28; the transmission components include a transmission plate 26, a guide shaft 23, a spring 21, an L-shaped plate 24, and a speed sensor 22; a vertical shaft 27 is fixedly arranged in the middle of the transmission plate 26, and the vertical shaft 27 is rotatably arranged on the base 1; a push groove is provided on the push block 28, and one end of the transmission plate 26 is movably placed in the push groove; the L-shaped plate 24 is fixed on the slider 8; the other end of the transmission plate 26... The guide shaft 23 is slidably connected to the L-shaped plate 24 at one end; the L-shaped plate 24 is provided with a guide hole for accommodating the guide shaft 23, and the guide shaft 23 is slidably connected through the guide hole. The end of the guide shaft 23 is fixedly connected to the base 1; the axis of the guide shaft 23 is parallel to the length direction of the guide rail 7; the spring 21 is sleeved on the guide shaft 23, with one end abutting against the base 1 and the other end abutting against the L-shaped plate 24; the speed sensor 22 is fixed on the L-shaped plate 24 and is used to monitor the speed change of the rotating shaft 10 of the idler roller 4; the electric cylinder 18 and the speed sensor 22 are electrically connected to the control box respectively.When the belt conveyor is working normally, the push block 28 on the electric cylinder 18 remains relatively stationary with the base 1, and the spring 21 is in a compressed state. At this time, the transmission plate 26 is limited by the push block 28 and cannot move. One end of the transmission plate 26 presses against one side of the L-shaped plate 24, preventing the L-shaped plate 24 from sliding on the guide shaft 23. When the conveyor belt of the belt conveyor breaks, the speed sensor 22 detects an abnormal change in the rotation speed of the idler roller 4. The control box controls the piston rod of the electric cylinder 18 to move, causing the transmission plate 26 to deflect and disengage from the L-shaped plate 24. The spring 21 pushes the L-shaped plate 24 to move along the guide shaft 23. The L-shaped plate 24 drives the slider 8 to move on the guide rail 7. The slider 8 drives the rotating shaft 10 of the idler roller 4 to move along the guide rail 7, thereby driving the guide assembly 11 to move the lower clamping plate 2 towards the upper clamping plate 3, clamping the conveyor belt between the upper clamping plate 3 and the lower clamping plate 2.
[0024] In this embodiment, a traction rod 25 is fixedly installed on the L-shaped plate 24; an elbow 20 is fixedly installed on the end of the traction rod 25 away from the L-shaped plate 24; an anti-collision pad 19 is fixedly installed on the elbow 20. The anti-collision pad 19 is used to reduce the impact force between the elbow 20 and the base 1, and extend the service life of the equipment. By pulling the elbow 20, the L-shaped plate 24 is returned to its original position. After the electric cylinder 18 is reset, the slider 8 is fixed again through the transmission plate 26, realizing reuse.
[0025] In this embodiment, the guide assembly 11 is a conventional design, including a bracket 12, guide rollers 13, guide plate 17, limiting rollers 15, upright plate 16, and push plate 6; the bracket 12 is fixed on the base 1; the limiting rollers 15 and guide rollers 13 are rotatably mounted on the bracket 12; multiple guide rollers 13 are configured; the axes of the multiple guide rollers 13 are arranged parallel and spaced apart in the same plane, the distance between the axes of the multiple guide rollers 13 and the base 1 in the vertical plane gradually increases, and the multiple guide rollers 13 are arranged obliquely on the bracket 12; the limiting rollers 15 are placed on the guide plate 16. Above the guide roller 13, the axis is parallel to the axis of the guide roller 13; the guide plate 17 is placed between the guide roller 13 and the limiting roller 15, with its lower end face rolling in contact with the guide roller 13 and its upper end face rolling in contact with the limiting roller 15; the upright plate 16 is vertically fixed to the upper part of the guide plate 17; the lower clamping plate 2 is fixed to the top of the upright plate 16; the push plate 6 is fixed to one side of the upright plate 16; the lower part of the push plate 6 is provided with a guide groove 9 that matches the rotating shaft 10 of the idler roller 4, the opening of the guide groove 9 is set towards the base 1, and the rotating shaft 10 of the idler roller 4 is movably placed in the guide groove 9. When the guide plate 17 moves on the bracket 12, the lower clamping plate 2 moves closer to or away from the upper clamping plate 3 in a state parallel to the upper clamping plate 3.
[0026] In this embodiment, the guide assembly 11 further includes a positioning roller 14; the positioning roller 14 is rotatably disposed on the top of the bracket 12; the positioning roller 14 makes rolling contact with the side of the upright plate 16; the positioning roller 14 is used to reduce the shaking of the upright plate 16 and make the equipment run more smoothly.
[0027] In this embodiment, a guide roller 4 is rotatably mounted on the base 1 to prevent the conveyor belt from running off-track.
[0028] Working principle of electric capture device for belt conveyor
[0029] 1. During normal operation (untriggered state)
[0030] Conveyor belt support: The idler roller 4 rotates normally under the support of the bearing seat, and the conveyor belt of the belt conveyor runs freely between the upper clamping plate 3 and the lower clamping plate 2 without contacting the clamping plates.
[0031] Locking mechanism: The push block 28 of the electric cylinder 18 presses against the L-shaped plate 24 through the transmission plate 26, keeping the slider 8 and the guide assembly 11 in a fixed position, the spring 21 is in a compressed state, and the lower clamping plate 2 and the upper clamping plate 3 maintain a safe distance.
[0032] Speed monitoring: Speed sensor 22 monitors the rotational speed of idler roller 4 in real time to ensure the normal operation of the belt conveyor.
[0033] 2. Triggering state when the conveyor belt breaks or malfunctions.
[0034] Anomaly detection: When the conveyor belt breaks or slips, the rotational speed of idler roller 4 changes abruptly. Speed sensor 22 detects the abnormal signal and sends it to the control box.
[0035] Electric cylinder 18 action: The control box starts electric cylinder 18, the piston rod drives push block 28 to move, causing transmission plate 26 to deflect and release the lock on L-shaped plate 24.
[0036] Spring 21 releases: The compressed spring 21 pushes the L-shaped plate 24 to slide along the guide shaft 23, causing the slider 8 to move along the guide rail 7.
[0037] Clamping action: The movement of slider 8 causes the lower clamping plate 2 to move upward in parallel through the guide assembly 11 (guide roller 13, guide plate 17, push plate 6, etc.), which cooperates with the upper clamping plate 3 to clamp the conveyor belt and prevent it from continuing to slide down.
[0038] 3. Reset process (manual intervention)
[0039] Manual reset: The operator pulls the elbow 20 on the traction rod 25 to return the L-shaped plate 24 to its original position along the guide shaft 23, and the spring 21 is recompressed.
[0040] Electric cylinder 18 resets: The piston rod of electric cylinder 18 retracts, push block 28 resets, transmission plate 26 presses against L-shaped plate 24 again, slider 8 locks again, and the equipment returns to standby state.
[0041] 4. Auxiliary functions (anti-deviation and cushioning)
[0042] Correction function: The correction roller 4 on the base 1 prevents the conveyor belt from running off-track and ensures that the catcher is aligned with the edge of the conveyor belt.
[0043] Buffer protection: Anti-collision pad 19 absorbs the impact during reset, reduces equipment wear, and extends service life.
[0044] This electric capture device achieves fast, stable, and repeatable conveyor belt capture through the coordinated action of electronic triggering, spring 21 drive, and mechanical guidance, effectively improving the safety and reliability of the belt conveyor.
Claims
1. An electric grabber for a belt conveyor, comprising a base (1), a roller (4), and two grabber units; a guide rail (7) is fixedly mounted on the base (1), a slider (8) is mounted on the guide rail (7), a bearing seat is fixedly mounted on the slider (8), and the shaft (10) of the roller (4) is rotatably mounted in the bearing seat; the two grabber units are symmetrically arranged on both sides of the roller (4), and each grabber unit includes an upper clamping plate (3) and a lower clamping plate (2); the upper clamping plate (3) is fixed on the base (1); the lower clamping plates (2) are arranged parallel to each other below the upper clamping plate (3); a guide assembly (11) is mounted on the base (1), and the lower clamping plate (2) is mounted on the guide assembly (11); the guide assembly (11) is connected to the slider (8) in a transmission manner; the movement of the slider (8) drives the guide assembly (11), thereby causing the lower clamping plate (2) to move closer to the upper clamping plate (3), characterized in that, It also includes a drive unit (5); the drive unit (5) includes a control box, an electric cylinder (18), a push block (28) and two transmission components; the control box and the electric cylinder (18) are fixed on the base (1), and the push block (28) is fixed on the piston rod of the electric cylinder (18); the two transmission components are symmetrically arranged on both sides of the push block (28); the transmission components include a transmission plate (26), a guide shaft (23), a spring (21), an L-shaped plate (24) and a speed sensor (22); a vertical shaft (27) is fixedly arranged in the middle of the transmission plate (26), and the vertical shaft (27) is rotatably arranged on the base (1); a push groove is provided on the push block (28), and one end of the transmission plate (26) is movably placed in the push groove; the L-shaped plate (24) is fixedly arranged on the base (1) and the guide shaft (18) is rotatably arranged on the base (1); a push groove is provided on the push block (28), and one end of the transmission plate (26) is movably placed in the push groove; the L-shaped plate (24) is fixedly arranged on the base (1) and the guide shaft (23) is rotatably arranged on the base (1); the control box and the electric cylinder (18) are fixedly arranged on the base (1), and the guide shaft (23) is rotatably arranged on the base (1); the guide shaft (24) is rotatably ... The transmission plate (26) is fixed on the slider (8); the other end of the transmission plate (26) abuts against the L-shaped plate (24); the L-shaped plate (24) is provided with a guide hole for accommodating the guide shaft (23), the guide shaft (23) is slidably through the guide hole, and the end of the guide shaft (23) is fixedly connected to the base (1); the axis of the guide shaft (23) is parallel to the length direction of the guide rail (7); the spring (21) is sleeved on the guide shaft (23), one end abuts against the base (1), and the other end abuts against the L-shaped plate (24); the speed sensor (22) is fixed on the L-shaped plate (24) and is used to monitor the speed change of the rotating shaft (10) of the idler roller (4); the electric cylinder (18) and the speed sensor (22) are electrically connected to the control box respectively.
2. The electric snatcher for a belt conveyor according to claim 1, wherein A traction rod (25) is fixedly installed on the L-shaped plate (24); an elbow (20) is fixedly installed on one end of the traction rod (25) away from the L-shaped plate (24); and an anti-collision pad (19) is fixedly installed on the elbow (20).
3. The electric snatcher for a belt conveyor according to claim 1, wherein The guiding assembly (11) includes a bracket (12), guide rollers (13), guide plate (17), limiting rollers (15), upright plate (16), and push plate (6); the bracket (12) is fixed on the base (1); the limiting rollers (15) and guide rollers (13) are rotatably mounted on the bracket (12); multiple guide rollers (13) are configured; the axes of the multiple guide rollers (13) are arranged in parallel intervals in the same plane, the distance between the axes of the multiple guide rollers (13) and the base (1) in the vertical plane gradually increases, and the multiple guide rollers (13) are arranged obliquely on the bracket (12); the limiting rollers (15) are placed above the guide rollers (13). The axis is parallel to the axis of the guide roller (13); the guide plate (17) is placed between the guide roller (13) and the limiting roller (15), the lower end face is in rolling contact with the guide roller (13), and the upper end face is in rolling contact with the limiting roller (15); the upright plate (16) is vertically fixed on the upper part of the guide plate (17); the lower clamping plate (2) is fixed on the top of the upright plate (16); the push plate (6) is fixed on one side of the upright plate (16); the lower part of the push plate (6) is provided with a guide groove (9) that is adapted to the rotating shaft (10) of the idler roller (4), the opening of the guide groove (9) is set towards the base (1), and the rotating shaft (10) of the idler roller (4) is movably placed in the guide groove (9).
4. The electric snatcher for a belt conveyor according to claim 3, wherein The guide assembly (11) also includes a positioning roller (14); the positioning roller (14) is rotatably disposed on the top of the bracket (12); the positioning roller (14) makes rolling contact with the side of the upright plate (16).
5. The electric snatcher for a belt conveyor according to claim 1, wherein The base (1) is rotatably mounted with a correction roller (4).