A pull test device for mine belt speed protection sensor

Abstract

The application discloses a kind of lifting test devices of mine belt speed protection sensor, including left support and right support fixedly installed on the longitudinal beam of belt conveyor belt rack, rotating support part is respectively arranged on left support and right support;Horizontal bar is arranged between left support and right support, both ends of horizontal bar are rotatably connected with corresponding rotating support part, so that horizontal bar can rotate around its own axis;One end of horizontal bar is fixedly connected with handle, for driving horizontal bar to rotate;The upper end of flexible connecting piece is connected with the middle part of horizontal bar, the lower end of flexible connecting piece is connected with roller lifting frame, and the roller lifting frame is arranged on the roller frame of roller type anti-slip protection sensor;The present application overcomes the defects that the long handle tool is inconvenient to operate and has safety hazards when prying the roller in the prior art, and has the characteristics of simple structure, low cost, convenient operation and safety and reliability.

Description

Technical Field

[0001] This invention belongs to the technical field of safety protection devices for mining belt conveyors, specifically relating to a lifting test device for a mining belt speed protection sensor. Background Technology

[0002] Belt conveyors must be equipped with anti-slip (speed) protection devices, and regular operational tests are required to verify the reliability of these devices. Currently, roller-type anti-slip protection sensors are widely used in mines. The rollers are in close contact with the conveyor belt surface and rotate with the belt. During routine testing, the rollers must be disengaged from the conveyor belt so that the sensor detects a zero-speed signal, thereby verifying whether the protection function is normal.

[0003] Current testing methods often involve using long-handled tools (such as pry bars or extended wrenches) to pry the rollers off the conveyor belt from below or the side. This method is inconvenient, inefficient (requires two people and takes a long time per test), and poses safety hazards such as injury to personnel or damage to the conveyor belt due to tool slippage. Furthermore, the prying angle is difficult to control, making it impossible to achieve a stable and continuous detachment, resulting in unreliable test results. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting test device for a mine belt speed protection sensor, so as to overcome the defects of the prior art, which is inconvenient to operate and poses safety hazards when using long-handled tools to pry the roller.

[0005] The present invention adopts the following technical solution: A lifting test device for a mining belt speed protection sensor includes a left support and a right support fixedly installed on the longitudinal beam of the belt conveyor frame, and a rotating support is provided on the left support and the right support respectively. A crossbar is provided between the left and right supports, and the two ends of the crossbar are rotatably connected to the corresponding rotating support parts, so that the crossbar can rotate around its own axis. A handle is fixedly connected to one end of the crossbar for driving the crossbar to rotate; The middle part of the crossbar is connected to the upper end of the flexible connector, and the lower end of the flexible connector is connected to the roller lifting frame. The roller lifting frame is set on the roller frame of the roller-type anti-slip protection sensor.

[0006] The beneficial effects of this invention are as follows: By setting a rotatable crossbar and a flexible connector, this invention transforms the traditional pry-type operation into a rotary lifting operation. Because the crossbar is rotated by a handle and wrapped around the flexible connector, the operator can stay away from the dangerous areas of the rollers and conveyor belt. Only one person is needed to smoothly and effortlessly lift the rollers and keep them in the detached position, thereby solving the problems of inconvenient operation, low efficiency, and safety hazards in the prior art, and realizing safe, efficient and reliable test operation. Attached Figure Description

[0007] Figure 1 This is a schematic diagram illustrating the working state of the present invention; Figure 2 This is a structural schematic diagram from a first perspective of the present invention; Figure 3 This is a structural schematic diagram from a second perspective of the present invention; Figure 4 This is a side view of the invention in its working state; Among them, 1. left support, 2. right support, 3. crossbar, 4. handle, 5. flexible connector, 6. roller lifting frame, 7. roller anti-slip protection sensor, 8. roller frame, 9. left bearing seat, 10. right bearing seat, 11. left rolling bearing, 12. right rolling bearing, 13. left limit stop, 14. right limit stop, 15. cable groove, 16. first side arm, 17. second side arm, 18. cross arm, 19. inner clamping plate, 20. outer clamping plate, 21. bolt, 22. belt frame longitudinal beam, 23. idler roller frame. Detailed Implementation

[0008] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. In this invention, "path" refers to the direction in which the invention is situated. Figure 1 Description of the state's progression.

[0009] In one embodiment, such as Figure 1 and Figure 4 As shown, a lifting test device for a mining belt speed protection sensor includes a left support 1 and a right support 2 fixedly installed on the longitudinal beam 22 of the belt conveyor frame. Rotary support parts are respectively provided on the left support 1 and the right support 2. A crossbar 3 is provided between the left support 1 and the right support 2. The two ends of the crossbar 3 are rotatably connected to the corresponding rotating support parts, so that the crossbar 3 can rotate around its own axis. A handle 4 is fixedly connected to one end of the crossbar 3 for driving the crossbar 3 to rotate. The middle part of the crossbar 3 is connected to the upper end of the flexible connector 5, and the lower end of the flexible connector 5 is connected to the roller lifting frame 6. The roller lifting frame 6 is set on the roller frame 8 of the roller-type anti-slip protection sensor 7.

[0010] Operators only need to turn handle 4 to smoothly lift the roller through flexible connector 5 without the need for long-handled tools, thus avoiding the risk of slippage and injury. Moreover, a single test can be completed independently by one person, significantly improving efficiency.

[0011] It should be noted that the roller frame 8 is mounted on the idler frame 23 via a hinge. Specifically, one side of the roller frame 8 is hinged to the idler frame 23, allowing the roller frame 8, along with the roller-type anti-slip protection sensor 7 mounted thereon, to rotate upwards around the hinge axis. Therefore, when the flexible connector 5 pulls the roller lifting frame 6 upwards, the roller frame 8 can smoothly rotate around the hinge, thereby lifting the roller-type anti-slip protection sensor 7 and detaching it from the conveyor belt surface. This hinge connection structure ensures that the roller-type anti-slip protection sensor 7 can be reliably lifted and can automatically reset by gravity after the test.

[0012] Specifically, such as Figure 2 As shown, the rotating support includes a left bearing seat 9 and a right bearing seat 10 fixedly mounted on the left bracket 1 and the right bracket 2, and a left rolling bearing 11 and a right rolling bearing 12 respectively installed in the left bearing seat 9 and the right bearing seat 10; the two ends of the crossbar 3 are fixedly connected to the inner rings of the left rolling bearing 11 and the right rolling bearing 12 respectively.

[0013] Using rolling bearings for support can significantly reduce rotational friction, making operation easier and extending the service life of the device.

[0014] As a further preferred option, both the left rolling bearing 11 and the right rolling bearing 12 are deep groove ball bearings with sealing rings (such as 6202-2RS), which can effectively prevent coal dust from entering the bearing interior in the coal mine, extend the bearing service life, and achieve maintenance-free operation.

[0015] In another embodiment, such as Figure 3 As shown, the middle part of the crossbar 3 is provided with a left limiting plate 13 and a right limiting plate 14. The left limiting plate 13 and the right limiting plate 14 are arranged at intervals along the axial direction of the crossbar, and a wire receiving groove 15 is formed between them. The upper end of the flexible connector 5 is fixed to the crossbar 3 in the wire receiving groove 15.

[0016] The outer diameters of the left limit stop plate 13 and the right limit stop plate 14 are larger than the diameter of the crossbar 3, and the axial distance between them is 30mm to 80mm.

[0017] This structure effectively prevents the flexible connector 5 from slipping to the sides or winding randomly during the winding process, ensuring the consistency of each lifting stroke and improving the stability and reliability of the operation.

[0018] The left limit stop plate 13 and the right limit stop plate 14 can be annular shoulders machined integrally with the crossbar 3, or they can be annular washers welded and fixed to the crossbar 3, or they can be detachable retaining rings fixed by set screws, to adapt to different processing conditions.

[0019] Specifically, such as Figure 2As shown, the roller lifting frame 6 includes a first side arm 16, a second side arm 17 and a cross arm 18. One end of the first side arm 16 and the second side arm 17 are respectively connected to the roller frame 8 on both sides of the roller anti-slip protection sensor 7. The cross arm 18 is connected to the other end of the first side arm 16 and the second side arm 17. The lower end of the flexible connector 5 is bound to the cross arm 18.

[0020] This structure evenly transmits the lifting force of the flexible connector 5 to both sides of the roller, preventing the roller from tilting and getting stuck, ensuring that the roller rises vertically and maintains a horizontal posture, thereby stably detaching from the surface of the conveyor belt.

[0021] As a further improvement, the roller lifting frame 6 can be a one-piece molded U-shaped steel bar, or it can be welded from three sections of flat steel.

[0022] In another embodiment, the flexible connector 5 is galvanized iron wire or steel wire rope with a diameter of 1.5mm to 3mm. Galvanized iron wire is readily available and inexpensive, making it suitable for in-house production in coal mines; steel wire rope has better flexibility and corrosion resistance, and a longer service life.

[0023] Specifically, such as Figure 2 As shown, the left support 1 and the right support 2 each include an inner clamping plate 19 and an outer clamping plate 20, which are clamped to both sides of the belt conveyor longitudinal beam 22 by bolts 21. This clamping structure requires no hot welding, is easy to install, can be adapted to different models of belt conveyors, and can be reused after disassembly.

[0024] In another embodiment, handle 4 is an L-shaped rocker or a straight handle.

[0025] Specifically, to improve operational comfort, the gripping end of handle 4 can be equipped with an anti-slip rubber sleeve to increase friction and prevent hand slippage. After passing through the central through hole of the bearing seat on the corresponding side, handle 4 is fixedly connected to the end of crossbar 3 (such as by welding, threaded connection or key connection). The diameter of the central through hole of the bearing seat is larger than the outer diameter of handle 4, and there is a rotation gap of about 2mm between the two to ensure that the handle does not interfere with the bearing seat.

[0026] Furthermore, a flexible binding element is connected to the handle 4. The flexible binding element is used to bind and fix the handle 4 to the belt frame longitudinal beam 22 or the idler frame 23 after it is rotated into position, so as to maintain the lifting state of the roller-type anti-slip protection sensor 7. The flexible binding element is iron wire or steel wire rope.

[0027] After the roller is lifted by rotating handle 5, the operator can temporarily fix the handle with a flexible strap, eliminating the need to hold the handle continuously and preventing the roller from falling back unexpectedly, thus improving the safety and convenience of the test process.

[0028] In another embodiment, the left limiting plate 13 and the right limiting plate 14 are fixed to the crossbar 3 by welding, and the axial distance between them is 50mm; the flexible connector 5 is made of galvanized iron wire with a diameter of 2mm; the roller lifting frame 6 is made of round steel with a diameter of 6mm bent into a U shape, and the ends of the first side arm 16 and the second side arm 17 are connected to the shaft end of the roller frame 8 by pins; the left rolling bearing 11 and the right rolling bearing 12 are deep groove ball bearings 6202-2RS with sealing rings.

[0029] In another embodiment, the left bracket 1 and the right bracket 2 are directly fixed to the longitudinal beam 22 of the belt conveyor using U-bolts. This method is suitable for situations where clamps cannot be installed on some belt conveyors, and the installation is equally simple.

[0030] In summary, the lifting test device for the speed protection sensor of the mining belt of the present invention has a simple structure, low cost, convenient operation, and safety and reliability. It can be widely used in the daily speed protection test of various belt conveyors in coal mines and has high industrial practical value and promising prospects for promotion and application.

Claims

1. A lifting test device for a mine conveyor belt speed protection sensor, characterized in that, It includes a left support (1) and a right support (2) fixedly installed on the longitudinal beam (22) of the belt conveyor frame, and the left support (1) and the right support (2) are respectively provided with rotating support parts; A crossbar (3) is provided between the left support (1) and the right support (2). The two ends of the crossbar (3) are rotatably connected to the corresponding rotating support, so that the crossbar (3) can rotate around its own axis. One end of the crossbar (3) is fixedly connected to a handle (4) for driving the crossbar (3) to rotate; The middle part of the crossbar (3) is connected to the upper end of the flexible connector (5), and the lower end of the flexible connector (5) is connected to the roller lifting frame (6). The roller lifting frame (6) is set on the roller frame (8) of the roller anti-slip protection sensor (7).

2. The lifting test device for a mine belt speed protection sensor according to claim 1, characterized in that, The rotating support includes a left bearing seat (9) and a right bearing seat (10) fixedly mounted on the left bracket (1) and the right bracket (2), and a left rolling bearing (11) and a right rolling bearing (12) respectively installed in the left bearing seat (9) and the right bearing seat (10); the two ends of the crossbar (3) are fixedly connected to the inner rings of the left rolling bearing (11) and the right rolling bearing (12) respectively.

3. The lifting test device for a mine belt speed protection sensor according to claim 1, characterized in that, The middle part of the crossbar (3) is provided with a left limiting plate (13) and a right limiting plate (14). The left limiting plate (13) and the right limiting plate (14) are arranged at intervals along the axial direction of the crossbar, and a groove (15) is formed between them. The upper end of the flexible connector (5) is fixed on the crossbar (3) in the groove (15).

4. The lifting test device for a mine belt speed protection sensor according to claim 1, characterized in that, The roller lifting frame (6) includes a first side arm (16), a second side arm (17) and a cross arm (18). One end of the first side arm (16) and the second side arm (17) are respectively connected to the roller frame (8) on both sides of the roller anti-slip protection sensor (7). The cross arm (18) is connected to the other end of the first side arm (16) and the second side arm (17). The lower end of the flexible connector (5) is bound to the cross arm (18).

5. The lifting test device for a mine belt speed protection sensor according to claim 1, characterized in that, The flexible connector (5) is a galvanized iron wire or a steel wire rope.

6. The lifting test device for a mine belt speed protection sensor according to claim 1, characterized in that, The left support (1) and the right support (2) include an inner clamping plate (19) and an outer clamping plate (20), respectively. The inner clamping plate (19) and the outer clamping plate (20) are clamped to both sides of the belt frame longitudinal beam (22) by bolts (21).

7. The lifting test device for a mine belt speed protection sensor according to claim 1, characterized in that, The handle (4) is an L-shaped rocker or a straight handle.

8. The lifting test device for a mine belt speed protection sensor according to claim 1, characterized in that, The handle (4) is connected to a flexible binding member, which is used to bind and fix the handle (4) to the belt frame longitudinal beam (22) or the roller frame (23) after the handle (4) is rotated into place, so as to maintain the lifting state of the roller-type anti-slip protection sensor (7).

9. The lifting test device for a mine belt speed protection sensor according to claim 8, characterized in that, The flexible binding element is iron wire or steel wire rope.

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