Tester for safety detection of mine transportation equipment
By designing an automatic opening and closing protective shell and a buffer protection auxiliary device, the problem of easy damage to Hall sensors in the detection of mining transportation equipment was solved, thereby improving the detection accuracy and the service life of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-04-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the current safety inspection of mining transportation equipment, the protective shell of the gaussmeter detection head is not promptly reassembled after being removed, which makes the probe part easily damaged and affects the accuracy of the inspection.
A safety testing instrument for mining transportation equipment has been designed, comprising a gaussmeter body, connecting wires, a rod, and a Hall sensor. Through the gripping shell, protective components, and storage device of the auxiliary device, the protective shell can be automatically opened and closed and buffered to prevent damage to the Hall sensor.
Effectively protects Hall sensors from damage caused by failure to install protective housings in a timely manner, improves detection accuracy, reduces the problem of tangled connecting wires, and extends the service life of equipment.
Smart Images
Figure CN121805913A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of equipment safety testing technology, specifically to a testing instrument for safety testing of mining transportation equipment. Background Technology
[0002] Mining transportation equipment is a core hub in the mining production chain, undertaking the efficient transfer of ore, waste, and materials, and is widely adaptable to complex operating scenarios such as underground tunnels and open-pit mines. Equipment types include electric locomotives, railcars, belt conveyors, scraper conveyors, and trackless rubber-tired vehicles, which can be flexibly selected according to mine terrain, transportation distance, and material characteristics. In the safety performance testing of industrial equipment such as electric locomotives, when testing key components such as the built-in permanent magnet motor for indicators such as magnetic field parameters and magnetic performance consistency, a gaussmeter is one of the core testing instruments. It is used to accurately obtain relevant data on the magnetic field strength of the permanent magnet motor, providing quantitative evidence for safety testing results.
[0003] The gaussmeter is a high-precision magnetic field measuring instrument based on the Hall effect principle. It is widely used in fields such as electronic manufacturing, industrial inspection, and scientific research experiments. Its core component adopts a high-sensitivity Hall sensor, coupled with a precise signal processing circuit, which can quickly capture DC, AC and pulse magnetic field signals. The measurement range covers several gauss to tens of thousands of gauss, with a resolution of 0.1 gauss, meeting the magnetic field quantification needs in different scenarios.
[0004] In the current process of using gaussmeter testing instruments to conduct safety inspections on mining transportation equipment, the protective shell on the gaussmeter head must be removed before the inspection can begin. However, if the protective shell is not reassembled onto the head in a timely manner after the inspection, the probe is easily damaged by external forces such as squeezing or bumping, which can lead to a decrease in the accuracy of subsequent safety inspections and cause inaccurate testing.
[0005] Therefore, we propose a testing instrument for safety inspection of mining transportation equipment. Summary of the Invention
[0006] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a testing instrument for safety inspection of mining transportation equipment. It solves the problem that existing technologies require the protective shell to be removed before starting the inspection operation; and that if the protective shell is not reassembled onto the testing head in a timely manner after the inspection, the probe part is easily damaged by external forces such as squeezing and bumping, which leads to a decrease in the accuracy of subsequent safety inspections and causes inaccurate testing.
[0007] (II) Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solution: a tester for safety testing of mining transportation equipment, comprising a gaussmeter body, a connecting wire plugged into the interface of the gaussmeter body, a rod installed at the other end of the connecting wire, a Hall sensor installed on the rod, and an auxiliary device provided on the rod; The auxiliary device includes a gripping sleeve that is fitted onto the rod body. A connecting wire passes through the gripping sleeve. A protective component is provided between the rod body and the gripping sleeve to buffer and protect the rod body and the Hall sensor. Two sets of unfolding components are provided on the surface of the rod body. Each set of unfolding components is provided with a protective shell. The unfolding components are used to control the unfolding and closing of the protective shell. When closed, the protective shell and the gripping sleeve form a protective space. A pressing component is also provided on the inner wall of the gripping sleeve. The pressing component is used to control the synchronous movement of the two sets of unfolding components. A storage device is provided on the side of the gripping sleeve away from the protective shell for winding and storing the connecting wire. Through the above components, the protective shell and the gripping sleeve form a closed protective space, which can protect the Hall sensor and the rod. During detection, simply push the pressing component in the opposite direction along the radial direction of the gripping sleeve. The pressing component can drive the two sets of unfolding components to operate synchronously, causing the protective shell to open and exposing the Hall sensor for detection. When the pressure on the pressing component is released, the installation component drives the unfolding assembly and the protective shell to reset, thus protecting the Hall sensor in time.
[0008] Preferably, the unfolding assembly includes two connecting rods rotatably connected to the surface of the gripping sleeve. The two connecting rods symmetrically arranged with the protective shell are rotatably connected to the protective shell. A main shaft is rotatably connected to the inner wall of the gripping sleeve, and two connecting rods are fixedly connected to the main shaft. The two connecting rods are rotatably connected to the protective shell respectively. Through the above components, during use, when the pressing assembly is triggered, the two main shafts can be controlled to rotate synchronously. The main shaft drives the two connecting rods to rotate, and the connecting rods drive the protective shell to move. At the same time, the connecting rods rotate synchronously, thereby opening the two protective shells and moving them backward to expose the Hall sensor for detection.
[0009] Preferably, the pressing assembly includes a squeezing part disposed on the gripping sleeve shell, which moves radially along the gripping sleeve shell. A squeezing member is slidably connected to the inner wall of the gripping sleeve shell, and the squeezing member moves axially along the gripping sleeve shell. A return spring is fixedly connected to the side of the squeezing member corresponding to the inner wall of the gripping sleeve shell. Two racks are fixedly connected to the surface of the squeezing member, and a gear is fixedly connected to the surface of the main shaft. The racks mesh with the gear. Through the above components, when pressing is controlled, the squeezing part is pushed radially along the gripping sleeve shell, and the squeezing part pushes the squeezing member to move axially along the gripping sleeve shell. At this time, the racks and gears can drive the main shaft to rotate to achieve opening. When the squeezing part loses its squeezing of the squeezing member, the return spring can drive the squeezing member and racks to return to their original positions, and the unfolding assembly can drive the protective shell to close.
[0010] Preferably, the extrusion section includes two guide rods fixed in the inner wall of the gripping sleeve. Extrusion blocks are slidably connected to the surfaces of the two guide rods. Two through holes are provided on the surface of the gripping sleeve for the extrusion blocks to pass through. Pressing plates are fixedly connected to the upper surfaces of the two extrusion blocks. Through the above components, the pressing plates can be pushed, and the pressing plates drive the two extrusion blocks to move in the guide rods and move radially along the gripping sleeve. The extrusion blocks can push the extruded part to move, thereby realizing the control operation.
[0011] Preferably, a second reset spring is sleeved on the surface of the guide rod. The two ends of the second reset spring are fixedly connected to the inner wall of the squeezing block and the gripping sleeve, respectively. Through the above components, when the squeezing block is pressed during use, the second reset spring is deformed by force. When the squeezing block is no longer pressed, the second reset spring can quickly drive the squeezing block and the pressing plate to reset.
[0012] Preferably, an elastic sleeve is fixedly connected to the surface of the pressing plate, and the other end of the elastic sleeve is fixedly connected to the surface of the gripping sleeve shell. The elastic sleeve is made of rubber. Through the above components, the elastic sleeve, together with the pressing plate and the gripping sleeve shell, can achieve a sealing operation.
[0013] Preferably, the extrusion member includes a movable ring slidably connected to the inner wall of the gripping sleeve. Two rollers for contacting the extrusion block are rotatably connected on the side of the movable ring away from the rack. Through the above components, when the extrusion block contacts the extrusion member, it contacts the rollers in the extrusion member and then pushes the movable ring to move.
[0014] Preferably, the protective component includes two inner rings fixed to the rod body, and two outer rings fixedly connected to the inner wall of the gripping sleeve. Multiple sets of buffer springs with equal spacing are provided between the outer rings and the inner rings. Through the above components, when the rod body and the Hall sensor come into contact with a hard object, the multiple buffer springs can effectively buffer the impact and reduce the damage to the rod body and the Hall sensor.
[0015] Preferably, the storage device includes two arc-shaped blocks fixed to the surface of the gripping housing, forming a wire-holding space between the two arc-shaped blocks. A threaded groove is formed on the surface of each arc-shaped block, and a threaded ring is threadedly connected to the threaded groove. A rotating pressure ring is rotatably connected to the surface of the threaded ring. The wire-holding space allows the rotating pressure ring to be inserted. Using these components, during storage, the connecting wire can be wound around the two arc-shaped blocks, then inserted into the wire-holding space. After connecting the threaded ring to the threaded groove on the surface of the arc-shaped block, the rotating pressure ring is inserted into the wire-holding space to hold the connecting wire in place, thus completing the storage operation.
[0016] Preferably, a gasket is fixedly connected to the surface of the rotating pressure ring. Through the above-mentioned components, the gasket can improve and reduce damage to the connecting wire.
[0017] In summary, the technical effects and advantages of this invention are as follows: 1. In this invention, when not in use, the protective shell and the gripping sleeve form a closed protective space, which can protect the Hall sensor and the rod. During testing, simply push the pressing component in the opposite direction along the radial direction of the gripping sleeve. The pressing component can drive the two sets of unfolding components to operate synchronously, causing the protective shell to open and exposing the Hall sensor for testing. When the pressure on the pressing component is released, the installation component drives the unfolding assembly and the protective shell to reset, thus protecting the Hall sensor in time. This solves the problem of traditional equipment not installing the protective sleeve in time, causing the Hall sensor and other parts to be exposed and easily damaged by external forces such as squeezing and bumping.
[0018] 2. In this invention, by setting up a protective component, multiple sets of buffer springs are provided between the inner ring on the rod and the outer ring inside the gripping sleeve. These springs work together to absorb the impact force through the elastic deformation of the multiple sets of buffer springs when the rod or Hall sensor accidentally hits a hard object, thereby reducing the risk of component deformation and sensor malfunction caused by direct hard collision.
[0019] 3. In this invention, by setting up a storage device, the connecting wire can be wound around the arc-shaped block, and then the connecting wire can be inserted into the wire-clamping space between the two arc-shaped blocks. The threaded ring, together with the rotating pressure ring and the washer, can firmly fix the stored connecting wire in the wire-clamping space, thus completing the storage and reducing the tangling and knotting problems caused by the scattered placement of connecting wires in traditional testers. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of a testing instrument for safety testing of mining transportation equipment according to the present invention; Figure 2 This is a cross-sectional schematic diagram of an auxiliary device for a safety testing instrument for mining transportation equipment according to the present invention; Figure 3This is a cross-sectional view of the auxiliary device of the testing instrument for safety testing of mining transportation equipment according to the present invention. Figure 4 This is a partial structural schematic diagram of a testing instrument for safety testing of mining transportation equipment according to the present invention; Figure 5 This invention relates to a testing instrument for safety inspection of mining transportation equipment. Figure 4 Schematic diagram of the structure at point A in the middle; Figure 6 This is a partial structural schematic diagram of a testing instrument for safety testing of mining transportation equipment according to the present invention; Figure 7 This is a schematic diagram of the unfolded component structure of a testing instrument for safety testing of mining transportation equipment according to the present invention; Figure 8 This is a schematic diagram of the protective component structure of a tester for safety testing of mining transportation equipment according to the present invention.
[0021] In the diagram: 1. Gaussmeter body; 2. Connecting wire; 3. Rod; 4. Auxiliary device; 41. Grip sleeve; 42. Protective component; 421. Inner ring; 422. Outer ring; 423. Buffer spring; 43. Protective shell; 44. Connecting rod one; 45. Connecting rod two; 46. Main shaft; 47. Gear; 48. Rack; 49. Extrusion part; 491. Moving ring; 492. Roller; 410. Return spring one; 411. Pressing plate; 412. Elastic sleeve; 413. Extrusion block; 414. Guide rod; 415. Return spring two; 5. Storage device; 51. Arc block; 52. Threaded ring; 53. Rotating pressure ring; 54. Gasket; 55. Threaded groove; 6. Hall sensor. Detailed Implementation
[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] refer to Figure 1 - Figure 8 The tester shown is for safety testing of mining transportation equipment. It includes a gaussmeter body 1, a connecting line 2 connected to the interface of the gaussmeter body 1, a rod 3 installed at the other end of the connecting line 2, a Hall sensor 6 installed on the rod 3, and an auxiliary device 4 provided on the rod 3.
[0024] The auxiliary device 4 includes a gripping sleeve 41, which is fitted onto the rod 3. The connecting wire 2 passes through the gripping sleeve 41. A protective component 42 is provided between the rod 3 and the gripping sleeve 41 to buffer and protect the rod 3 and the Hall sensor 6. Two sets of unfolding components are provided on the surface of the rod 3. Each set of unfolding components is provided with a protective shell 43. The unfolding components are used to control the unfolding and closing of the protective shell 43. When closed, it forms a protective space with the gripping sleeve 41. A pressing component is also provided on the inner wall of the gripping sleeve 41 to control the synchronous movement of the two sets of unfolding components. A storage device 5 is provided on the side of the gripping sleeve 41 away from the protective shell 43 to wind and store the connecting wire 2.
[0025] In this implementation scheme: When not in use, the protective shell 43 and the gripping sleeve 41 form a closed protective space, which can protect the Hall sensor 6 and the rod 3. During testing, simply push the pressing component in the opposite direction along the radial direction of the gripping sleeve 41. The pressing component can drive the two sets of unfolding components to operate synchronously, causing the protective shell 43 to open and expose the Hall sensor 6 for testing. When the pressure on the pressing component is released, the installation component drives the unfolding assembly and the protective shell 43 to reset, thus protecting the Hall sensor 6 in time. This solves the problem of traditional equipment not installing the protective sleeve in time, causing the Hall sensor 6 and other parts to be exposed and easily damaged by external forces such as squeezing and bumping.
[0026] The unfolding assembly includes two connecting rods 44 that are rotatably connected to the surface of the gripping sleeve 41. The two connecting rods 44 are symmetrically arranged with the protective shell 43. The two connecting rods 44 are rotatably connected to the protective shell 43. A main shaft 46 is rotatably connected to the inner wall of the gripping sleeve 41. Two connecting rods 45 are fixedly connected to the main shaft 46. The two connecting rods 45 are rotatably connected to the protective shell 43 respectively.
[0027] In this implementation scheme: During use, when the pressing component is triggered, the two main shafts 46 can be controlled to rotate synchronously. The main shafts 46 drive the two connecting rods 45 to rotate, and the connecting rods 45 drive the protective shell 43 to move. At the same time, the connecting rod 44 rotates synchronously, thereby opening the two protective shells 43 and moving them to the rear to expose the Hall sensor 6 for detection.
[0028] The pressing assembly includes a pressing part disposed on the gripping sleeve 41, which moves radially along the gripping sleeve. A pressing element 49 is slidably connected to the inner wall of the gripping sleeve 41. The pressing element 49 moves axially along the gripping sleeve 41. A return spring 410 is fixedly connected to the side of the pressing element 49 corresponding to the inner wall of the gripping sleeve 41. Two racks 48 are fixedly connected to the surface of the pressing element 49. A gear 47 is fixedly connected to the surface of the main shaft 46. The racks 48 and gear 47 mesh with each other. The pressing element 49 includes a moving ring 491 slidably connected to the inner wall of the gripping sleeve 41. The moving ring 491 is located at... Two rollers 492 are rotatably connected to one side of the rack 48 for contacting the extrusion block 413. The extrusion part includes two guide rods 414 fixed in the inner wall of the gripping sleeve 41. The extrusion block 413 is slidably connected to the surface of the two guide rods 414. Two through holes for the extrusion block 413 to pass through are opened on the surface of the gripping sleeve 411. Pressing plates 411 are fixedly connected to the upper surface of the two extrusion blocks 413. A second return spring 415 is sleeved on the surface of the guide rods 414. The two ends of the second return spring 415 are fixedly connected to the extrusion block 413 and the inner wall of the gripping sleeve 41, respectively.
[0029] In this embodiment: When pressing is performed, the squeezing part is pushed in the radial direction of the gripping sleeve 41. The pressing plate 411 drives the two squeezing blocks 413 to move in the guide rod 414. Moving radially along the gripping sleeve 41, the squeezing blocks 413 can push the squeezing member 49 to move and contact the roller 492 in the squeezing member 49. The squeezing member 49 moves axially along the gripping sleeve 41. At this time, the rack 48 and the gear 47 can drive the main shaft 46 to rotate to achieve opening. When the squeezing part loses its squeezing of the squeezing member 49 and the pressing plate 411, the second return spring 415 can quickly drive the squeezing block 413 and the pressing plate 411 to reset. The first return spring 410 can drive the squeezing member 49 and the rack 48 to reset. The unfolding assembly can drive the protective shell 43 to close.
[0030] Among them, an elastic sleeve 412 is fixedly connected to the surface of the pressing plate 411, and the other end of the elastic sleeve 412 is fixedly connected to the surface of the gripping sleeve 41. The elastic sleeve 412 is made of rubber. The elastic sleeve 412, together with the pressing plate 411 and the gripping sleeve 41, can achieve a sealing operation.
[0031] The protective component 42 includes two inner rings 421 fixed on the rod body 3, and two outer rings 422 fixedly connected to the inner wall of the gripping sleeve 41. Multiple sets of buffer springs 423 with equal spacing are provided between the outer rings 422 and the inner rings 421.
[0032] In this implementation scheme: when the rod 3 and the Hall sensor 6 come into contact with a hard object, multiple buffer springs 423 can effectively buffer the impact and reduce the possibility of damage to the rod 3 and the Hall sensor 6.
[0033] The storage device 5 includes two arc-shaped blocks 51 fixed on the surface of the gripping sleeve 41, forming a wire-locking space between the two arc-shaped blocks 51. The surface of the arc-shaped blocks 51 is provided with a threaded groove 55, and a threaded ring 52 is threadedly connected to the threaded groove 55. A rotating pressure ring 53 is rotatably connected to the surface of the threaded ring 52. The wire-locking space is for the rotating pressure ring 53 to be inserted. A gasket 54 is fixedly connected to the surface of the rotating pressure ring 53.
[0034] In this implementation scheme: When storing, the connecting wire 2 can be wrapped around the two arc-shaped blocks 51, and then the connecting wire 2 can be inserted into the wire-holding space. After connecting the threaded ring 52 to the threaded groove 55 on the surface of the arc-shaped block, the pressure ring 53 is rotated into the wire-holding space and the gasket 54 is used to press down the connecting wire 2. The gasket 54 can improve and reduce damage to the connecting wire 2, and the storage operation can be completed.
[0035] Working principle of the invention: During use, when the Hall sensor 6 needs to be tested, the user only needs to push the pressing plate 411 radially along the gripping sleeve 41. The pressing plate can drive the two extrusion blocks 413 to move in the guide rod 414. The second return spring 415 is stressed. At this time, the extrusion block 413 contacts the roller 492 in the extrusion part 49 and pushes the roller 492 and the moving ring 491 to move along the axial direction of the gripping sleeve 41. The moving ring 491 drives the two racks 48 to move synchronously. The first return spring 410 is stressed and deformed. The racks 48 and the gear 47 can synchronously drive the two main shafts 46 to rotate. When the main shafts 46 rotate, the main shafts 46 drive the two connecting rods 45 to rotate. The connecting rods 45 drive the protective shell 43 to move. Simultaneously, the connecting rod 44 rotates synchronously, thereby opening the two protective shells 43 and moving them backward to expose the Hall sensor 6 for detection. When not in use, the user releases the pressing plate 411, and the reset spring 415 drives the pressing plate 411 and the squeezing block 413 to reset. At the same time, the reset spring 410 drives the moving ring 491 and the rack 48 to reset. The rack 48, in conjunction with the gear 47, drives the main shaft 46 to rotate in the opposite direction, and in conjunction with the connecting rod 44 and the connecting rod 45, drives the two protective sleeves to merge together, forming a protective space with the gripping shell 41, providing timely shielding and protection. This solves the problem of traditional equipment not installing protective sleeves in time, causing the Hall sensor 6 and other parts to be exposed and easily damaged by external forces such as squeezing and bumping. When using rod 3 and Hall sensor 6 for detection, when rod 3 or Hall sensor 6 hits an object, multiple buffer springs 423 are formed between inner ring 421 and outer ring 422, which can achieve buffer protection and reduce the problem of damage caused by direct hard collision; When the connecting wire 2 needs to be stored after being removed from the gaussmeter body 1, simply wrap the connecting wire 2 around the two arc-shaped blocks 51, and then insert the connecting wire 2 into the wire-holding space between the two arc-shaped blocks 51. After connecting the threaded ring 52 to the threaded groove 55 on the surface of the arc-shaped block 51, rotate the pressure ring 53 into the wire-holding space and use the gasket 54 to press down the connecting wire 2. The gasket 54 can improve and reduce damage to the connecting wire 2, thus completing the storage operation and reducing the tangling and knotting problems caused by the scattered placement of connecting wires in traditional testers.
[0036] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.
[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A testing instrument for safety inspection of mining transportation equipment, comprising a gaussmeter body (1), characterized in that: A connecting wire (2) is plugged into the interface of the gaussmeter body (1), and a rod (3) is installed at the other end of the connecting wire (2). A Hall sensor (6) is installed on the rod (3), and an auxiliary device (4) is provided on the rod (3). The auxiliary device (4) includes a gripping sleeve (41), which is fitted onto the rod (3). A connecting line (2) passes through the gripping sleeve (41). A protective component (42) is provided between the rod (3) and the gripping sleeve (41) to buffer and protect the rod (3) and the Hall sensor (6). Two sets of unfolding components are provided on the surface of the rod (3). Each set of unfolding components is provided with a protective shell (43). The unfolding components are used to control the unfolding and closing of the protective shell (43). After closing, it forms a protective space with the gripping sleeve (41). A pressing component is also provided on the inner wall of the gripping sleeve (41). The pressing component is used to control the synchronous movement of the two sets of unfolding components. The gripping sleeve (41) has a storage device (5) on the side away from the protective shell (43) for winding and storing the connecting line (2).
2. The testing instrument for safety testing of mining transportation equipment according to claim 1, characterized in that: The unfolding assembly includes two connecting rods (44) rotatably connected to the surface of the gripping sleeve (41). The two connecting rods (44) are symmetrically arranged with the protective shell (43). The two connecting rods (44) are rotatably connected to the protective shell (43). A main shaft (46) is rotatably connected to the inner wall of the gripping sleeve (41). Two connecting rods (45) are fixedly connected to the main shaft (46). The two connecting rods (45) are rotatably connected to the protective shell (43) respectively.
3. The testing instrument for safety testing of mining transportation equipment according to claim 2, characterized in that: The pressing assembly includes a pressing part disposed on the gripping sleeve (41) and moves radially along the gripping sleeve. A pressing element (49) is slidably connected to the inner wall of the gripping sleeve (41). The pressing element (49) moves axially along the gripping sleeve (41). A return spring (410) is fixedly connected to the side of the pressing element (49) corresponding to the inner wall of the gripping sleeve (41). Two racks (48) are fixedly connected to the surface of the pressing element (49). A gear (47) is fixedly connected to the surface of the main shaft (46). The racks (48) and the gears (47) are meshed together.
4. The testing instrument for safety testing of mining transportation equipment according to claim 3, characterized in that: The extrusion part includes two guide rods (414) fixed in the inner wall of the gripping sleeve (41). Extrusion blocks (413) are slidably connected to the surfaces of the two guide rods (414). Two through holes are opened on the surface of the gripping sleeve (41) for the extrusion blocks (413) to pass through. Pressing plates (411) are fixedly connected to the upper surfaces of the two extrusion blocks (413).
5. A testing instrument for safety inspection of mining transportation equipment according to claim 4, characterized in that: The guide rod (414) is fitted with a second reset spring (415), and the two ends of the second reset spring (415) are fixedly connected to the inner wall of the squeezing block (413) and the gripping sleeve (41), respectively.
6. The testing instrument for safety testing of mining transportation equipment according to claim 4, characterized in that: An elastic sleeve (412) is fixedly connected to the surface of the pressing plate (411), and the other end of the elastic sleeve (412) is fixedly connected to the surface of the gripping sleeve (41). The elastic sleeve (412) is made of rubber.
7. A testing instrument for safety testing of mining transportation equipment according to claim 3, characterized in that: The extrusion member (49) includes a movable ring (491) that is slidably connected to the inner wall of the gripping sleeve (41), and two rollers (492) for contacting the extrusion block (413) are rotatably connected to the side of the movable ring (491) away from the rack (48).
8. A testing instrument for safety inspection of mining transportation equipment according to claim 1, characterized in that: The protective component (42) includes two inner rings (421) fixed on the rod (3), and two outer rings (422) are fixedly connected to the inner wall of the gripping sleeve (41). Multiple sets of buffer springs (423) are provided between the outer rings (422) and the inner rings (421) at equal intervals.
9. A testing instrument for safety testing of mining transportation equipment according to claim 1, characterized in that: The storage device (5) includes two arc-shaped blocks (51) fixed on the surface of the gripping housing (41), forming a wire-locking space between the two arc-shaped blocks (51). The surface of the arc-shaped blocks (51) is provided with a threaded groove (55), and a threaded ring (52) is threadedly connected to the threaded groove (55). A rotating pressure ring (53) is rotatably connected to the surface of the threaded ring (52), and the wire-locking space is for the rotating pressure ring (53) to be inserted.
10. A testing instrument for safety testing of mining transportation equipment according to claim 9, characterized in that: A gasket (54) is fixedly connected to the surface of the rotating pressure ring (53).