A crack width measuring device for mines

Abstract

The invention discloses a crack width measuring device for mines, and relates to the technical field of measuring devices, comprising a detector, wherein a display screen is arranged on the top of the detector, an installation slot is arranged inside the detector, and a detection device, a protective device and an auxiliary device are arranged on the front side of the detector; a plug is inserted into the detector to complete docking, and electric wires are bundled by rotating a round rod. Because visibility in a mine is low, the risk of tripping or electric shock caused by scattered electric wires can be reduced by arranging and placing the electric wires, thereby reducing potential safety hazards. When external force causes the electric wires to be pulled, the sliding electric wires are clamped by the electric wires in cooperation with a wire pressing rod, a fixing rod, a No. 1 spring, a cylinder, a slider one, a slider two, a moving block and a clamping plate, so that the wires can be prevented from being broken or the connection damaged due to pulling, thereby reducing electrical faults. When detecting, the measured area is measured by moving a handheld electric push rod in cooperation with a fixing block and a probe assembly.

Description

Technical Field

[0001] The invention relates to the technical field of measuring devices, in particular to a crack width measuring device for mines. Background Art

[0002] During mining, crack monitoring and measurement are crucial to ensuring the safety and stability of mines. Mine cracks may affect the structural stability of mines and increase the risk of collapse and accidents. Accurately measuring crack width can help assess the stability of mines and take necessary safety measures.

[0003] Patent announcement number CN213984999U relates to the technical field of measuring devices. The patent discloses an intelligent crack width measuring device for tunnel detection, including a main unit, a display screen is arranged in the middle of the main unit, a speaker hole is arranged at the bottom of the display screen, a first fixed block is arranged on one side of the main unit, a card slot is opened inside the first fixed block, a first plug is arranged in the middle of the first fixed block, and mounting slots are arranged at both ends of the first plug; the intelligent crack width measuring device for tunnel detection, by arranging a card slot and a card block, the card slot and the card block cooperate to clamp the plug and will not loosen, after the measurement is completed, the button is pressed to retract the card block into the sleeve and the plug can be pulled out; by arranging a connecting rod, when measuring the crack width at a high place, the connecting rod is threadedly connected to the hand-held handle to increase the measuring range of the device, and the connecting rod can also be threadedly connected to the connecting rod according to actual use needs to measure at a high place, thereby further improving the scope of application of the device.

[0004] In the above patent, the plug is clamped and will not loosen, but the current measuring equipment has the following problems: when an external force pulls the wire, the insulation layer of the wire may be pulled and damaged, resulting in insulation failure, and may also cause the conductor in the wire to break or deform, affecting the normal transmission of current and even causing the circuit to be completely interrupted. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a crack width measuring device for use in mines, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a crack width measuring device for mining, comprising a detector, a display screen is arranged on the top of the detector, a mounting groove is arranged inside the detector, and a detection device, a protective device and an auxiliary device are arranged on the front side of the detector; wherein the detection device comprises a plug, an electric wire, a round rod, a cylinder, a wire pressing rod, a fixed rod, a No. 1 spring, a cylinder, a slider 1, a slider 2, a moving block, a clamping plate, an electric push rod, a fixed block and a probe assembly, the plug is slidably installed inside the detector, the electric wire is arranged on the surface of the plug, the round rod is rotatably installed on the front side of the detector, the cylinder is fixedly installed on the surface of the detector, the wire pressing rod is rotatably installed on the inner wall of the cylinder, one side of the fixed rod is fixedly installed on the inner wall of the cylinder, and the other side of the fixed rod is fixedly penetrated through the inner and outer walls of the wire pressing rod, the No. 1 spring is arranged between the cylinder and the wire pressing rod, the cylinder is fixedly installed on the inner wall of the cylinder, and the slider 1 is slidably installed on the inner wall of the cylinder, The slider 2 is slidably mounted on the inner wall of the cylinder, the moving block is slidably mounted on the inner wall of the cylinder, the clamping plate is fixedly mounted on the bottom of the moving block, the electric push rod is electrically connected to the detector through an electric wire, the electric push rod is connected to the detector through a plug, the electric wire is orderly wound through the round rod, the sliding wire is clamped by the sliding of the wire with the pressing rod, the fixed rod, the No. 1 spring, the cylinder, the slider 1, the slider 2, the moving block and the clamping plate, the fixed block is fixedly mounted on the output end of the electric push rod, the probe assembly is arranged on the top of the fixed block, the probe assembly includes a camera module, a lighting module and an infrared module, when performing detection, the measured area is measured by moving the handheld electric push rod to cooperate with the fixed block and the probe assembly, and the measuring height is adjusted by the electric push rod, infrared radiation is emitted by the infrared module and the reflected signal is received, the existence and width of the crack are inferred by analyzing the change of the reflected signal, the measured area is illuminated by the lighting lamp, and the real-time picture is transmitted to the display screen by the camera.

[0007] According to the above technical solution, a No. 2 spring is arranged between the slider 1 and the cylinder, a No. 3 spring is arranged between the slider 2 and the cylinder, a No. 4 spring is arranged between the moving block and the cylinder, an anti-sliding block is arranged at the bottom of the clamping plate, the probe assembly is electrically connected to the display screen, the interior of the cylinder is set to vacuum, the slider 1 moves along the inner wall of the cylinder, the slider 2 is moved by the setting of the vacuum inside the cylinder, and the outer wall of the plug is provided with a docking groove.

[0008] According to the above technical solution, the protective device includes an insert block, a U-shaped block and a No. 5 spring. The insert block is slidably installed on the inner wall of the installation groove, the U-shaped block is slidably installed on the inner wall of the installation groove, and the No. 5 spring is arranged between the insert block and the U-shaped block. By inserting the plug into the docking port of the detector, the plug is fixed by the insert block, the No. 5 spring and the docking groove.

[0009] According to the above technical solution, the protective device also includes a T-shaped block and a latch, one side of the T-shaped block is arranged on the inner wall of the installation groove, and the other side of the T-shaped block is fixedly installed on the inner wall of the U-shaped block. The latch slides through the inner and outer walls of the detector, and the plug can be removed by pressing the latch, T-shaped block, U-shaped block, No. 5 spring, plug block and docking groove.

[0010] According to the above technical solution, the protective device also includes a fixed cylinder, a sliding rod, a No. 6 spring and a universal wheel. The fixed cylinder is fixedly penetrated through the inner and outer walls of the fixed block, the sliding rod slides through the inner and outer walls of the fixed cylinder, the universal wheel is arranged on the top of the sliding rod, and the No. 6 spring is arranged between the universal wheel and the fixed cylinder. Hydraulic oil is arranged inside the fixed cylinder, and preliminary buffering is performed by the No. 6 spring. The movement of the piston block will compress the hydraulic oil in the fixed cylinder, and the hydraulic oil will flow into the top of the piston block through the slot. When the sliding rod is reset, the return speed of the hydraulic oil is slowed down due to the small slot, that is, the reset speed of the piston block is slowed down. The slower the speed of the piston block, the slower the reset speed of the No. 6 spring.

[0011] According to the above technical solution, the protective device also includes a piston block and a fixing button. The piston block is fixedly installed on the outer wall of the sliding rod, and the fixing button is fixedly installed on the bottom of the sliding rod. A slot is opened on the surface of the piston block. The slower the speed of the piston block, the slower the reset speed of the No. 6 spring.

[0012] According to the above technical solution, the auxiliary device includes a fixed plate, a limit rod, a baffle and a slide plate. The fixed plate is fixedly installed on the output end of the electric push rod, the limit rod is fixedly installed on the circumferential surface of the fixed plate, the baffle is rotatably installed on the inner wall of the fixed plate, and the slide plate is slidably installed on the inner wall of the baffle. The baffle is rotated downward by contacting the baffle through the movement of the fixing button. The rotation distance of the baffle is limited by the limit rod. When measuring high cracks, the operator who is looking directly at the measured location can be protected by the open baffle.

[0013] According to the above technical solution, the auxiliary device also includes a knocking block, a trigger rod, a connecting rod and a No. 7 spring. The knocking block is slidably installed on the inner wall of the baffle, the trigger rod is fixedly installed on the inner wall of the skateboard, one side of the connecting rod is fixedly installed on the bottom of the skateboard, and the other side of the connecting rod slides through the inner and outer walls of the baffle. The No. 7 spring is arranged between the baffle and the skateboard. When encountering deeper and wider cracks, it contacts the skateboard through the outer wall of the skateboard, so that the skateboard can be telescopically adjusted to cracks of different widths. The movement of the skateboard drives the trigger rod to move and at the same time drives the connecting rod to move, and at the same time compresses the No. 7 spring. When the trigger rod contacts the knocking block, the knocking block rotates toward the baffle and knocks the baffle.

[0014] The present invention provides a crack width measuring device for use in mines. It has the following beneficial effects:

[0015] (1) The invention, through the setting of the detection device, inserts the plug into the detector to complete the docking, and the wires are bundled by rotating the round rod. Because the visibility in the mine is low, the wires can be arranged and placed to reduce the risk of tripping or electric shock caused by the scattered wires, thereby reducing potential safety hazards. The wires are output through the cylinder. When the external force causes the wires to be pulled, the sliding wires are clamped by the wires sliding in conjunction with the wire pressing rod, the fixed rod, the No. 1 spring, the cylinder, the slider 1, the slider 2, the moving block and the clamping plate, which can avoid the wire breakage or damage to the connection caused by pulling, thereby reducing the risk of electrical failure or power outage. When detecting, the handheld electric push rod is moved to cooperate with the fixed block and the probe assembly to measure the measured area, and the measuring height is adjusted by the electric push rod. The infrared module emits infrared radiation and receives the reflected signal. The existence and width of the crack are inferred by analyzing the changes in the reflected signal. The measured area is illuminated by the lighting lamp, and the real-time image is transmitted to the display screen by the camera.

[0016] (2) The invention, through the provision of a protective device, inserts the plug into the docking port of the detector, fixes the plug by means of an insert block, a No. 5 spring and a docking slot, and prevents the plug from being loosened by accidental contact with an external force. A loose plug may cause unstable signal transmission. Ensuring that the plug is stable can ensure the integrity and accuracy of the signal. The plug can be removed by pressing the latch, the T-shaped block, the U-shaped block, the No. 5 spring, the insert block and the docking slot. The movement of the fixing block drives the movement of the protective device. When the detection device is detecting, the detection position of the detection device is supported by the contact between the universal wheel and the inner wall of the mine. When encountering an uneven surface in the mine, the universal wheel cooperates with the slide rod, the piston block, the No. 6 spring, the hydraulic oil and the slot to slow down the reset speed of the No. 6 spring, which can effectively reduce the vibration and impact generated during mobile measurement, thereby protecting the parts inside the probe assembly from damage caused by vibration.

[0017] (3) The invention, through the setting of auxiliary devices, moves the fixing button to contact the baffle so that the baffle rotates downward, and the rotation distance of the baffle is limited by the limit rod. When measuring high cracks, the open baffle can protect the operator who is looking directly at the measured area to prevent dust or gravel generated during the movement from falling and causing harm to the operator. When encountering deeper and wider cracks, the outer wall of the slide board contacts it, so that the slide board can be extended and adjusted to cracks of different widths. The slide board moves to cooperate with the trigger rod, connecting rod, No. 7 spring and knocking block to knock the baffle. By knocking the baffle, the dust that falls on the surface of the baffle or the connection between the slide board and the baffle is shaken off, preventing the dust from causing wear between the various components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the positional relationship between the wire and the cylinder of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the cylinder of the present invention;

[0021] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement of part A;

[0022] Figure 5 It is a schematic diagram of the structure of the protective device of the present invention;

[0023] Figure 6 It is a schematic diagram of the position relationship between the plug of the present invention and the internal structure of the detector;

[0024] Figure 7 This is a schematic diagram of the positional relationship between the slide bar and the cylinder of the present invention;

[0025] Figure 8 It is a schematic diagram of the internal structure of the baffle of the present invention.

[0026] In the figure: 1. detector; 2. display screen; 10. plug; 11. wire; 12. round rod; 13. cylinder; 14. wire pressing rod; 15. fixed rod; 16. spring No. 1; 17. cylinder; 18. slider No. 1; 19. slider No. 2; 110. moving block; 111. clamping plate; 112. electric push rod; 113. fixed block; 114. probe assembly; 20. plug block; 21. U-shaped block; 22. spring No. 5; 23. T-shaped block; 24. latch; 25. fixed cylinder; 26. slide rod; 27. spring No. 6; 28. universal wheel; 29. ​​piston block; 210. fixed button; 30. fixed plate; 31. limit rod; 32. baffle; 33. knocking block; 34. slide plate; 35. trigger rod; 36. connecting rod; 37. spring No. 7. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 5One embodiment of the present invention is: a crack width measuring device for mining, comprising a detector 1, a display screen 2 is arranged on the top of the detector 1, a mounting slot is arranged inside the detector 1, a detection device is arranged on the front side of the detector 1, and the detection device comprises a plug 10, a wire 11, a round rod 12, a cylinder 13, a wire pressing rod 14, a fixing rod 15, a first spring 16, a cylinder 17, a slider 18, a slider 2 19, a moving block 110, a clamping plate 111, an electric push rod 112, a fixing block 113 and a probe assembly 114, a plug 10 is slidably mounted inside the detector 1, the wire 11 is arranged on the surface of the plug 10, the round rod 12 is rotatably mounted on the front side of the detector 1, and the wire 11 is orderly wound by the round rod 12 to reduce signal interference, avoid winding and knotting, improve the durability of the wire 11, and make the wiring neater, convenient for maintenance and management, the cylinder 13 is fixedly mounted on the surface of the detector 1, the wire pressing rod 14 is rotatably mounted on the inner wall of the cylinder 13, one side of the fixed rod 15 is fixedly mounted on the inner wall of the cylinder 13, and the other side of the fixed rod 15 is fixedly penetrated inside and outside the wire pressing rod 14 The first spring 16 is arranged between the cylinder 13 and the wire pressing rod 14, and the wire pressing rod 14 is reset by the first spring 16. The cylinder 17 is fixedly installed on the inner wall of the cylinder 13. The slider 18 is slidably installed on the inner wall of the cylinder 17. The slider 2 19 is slidably installed on the inner wall of the cylinder 17. The moving block 110 is slidably installed on the inner wall of the cylinder 13. The clamping plate 111 is fixedly installed on the bottom of the moving block 110. The electric push rod 112 is electrically connected to the detector 1 through the wire 11. The fixed block 113 is fixedly installed on the input of the electric push rod 112. At the output end, when the wire 11 is pulled strongly, the internal wire may break or the insulation layer may be damaged. Anti-pulling measures can reduce this physical damage to ensure the long-term stability and reliability of the wire 11. The probe assembly 114 is arranged on the top of the fixed block 113. The probe assembly 114 includes a camera module, a lighting module and an infrared module. The detection is performed through the probe assembly 114, and the picture captured by the camera module is displayed in real time on the display screen 2. The lighting module is used for fill light, and the infrared module is used to measure the crack width.

[0029] A No. 2 spring is arranged between the slider 18 and the cylinder 17, and the No. 2 spring is used to reset the slider 18. A No. 3 spring is arranged between the slider 2 19 and the cylinder 17, and the No. 3 spring is used to reset the slider 2. A No. 4 spring is arranged between the moving block 110 and the cylinder 13, and the No. 4 spring is used to reset the moving block 110. An anti-sliding block is arranged at the bottom of the clamping plate 111 to prevent the wire 11 from sliding. The probe assembly 114 is electrically connected to the display screen 2. The interior of the cylinder 17 is set to be vacuum, and the outer wall of the plug 10 is provided with a docking groove.

[0030] When the present embodiment is working, the electric push rod 112 is connected to the detector 1 through the plug 10, and the wire 11 is wound in order through the round rod 12, which can reduce signal interference, avoid winding and knotting, improve the durability of the wire 11, and make the wiring neater, convenient for maintenance and management. The wire 11 is output through the cylinder 13 and contacts with the wire pressing rod 14. When the pulling force on the wire 11 is too large, the wire 11 drives the wire pressing rod 14 to rotate, and the rotation of the wire pressing rod 14 will compress the No. 1 spring 16. At this time, the wire pressing rod 14 will clamp the wire 11. The rotation of the wire pressing rod 14 will contact with the slider 18, so that the slider 18 moves along the inner wall of the cylinder 17. The setting of the vacuum inside the cylinder 17 makes the slider 2 19 move. The movement of the slider 2 19 will contact the inclined surface of the moving block 110, so that the moving block 110 moves downward, and the moving block 110 moves downward to drive the clamping When the plate 111 moves, the clamping plate 111 will clamp the wire 11 and prevent the wire 11 from sliding through the anti-sliding block. At this time, the wire 11 cannot be dragged to the greatest extent. When the wire 11 is pulled strongly, the internal wire may be broken or the insulation layer may be damaged. The anti-pulling measures can reduce such physical damage to ensure the long-term stability and reliability of the wire 11. The wire 11 is rolled up by rotating the round rod 12 to restore the anti-pulling measures. The distance is adjusted by aligning the fixed end of the handheld electric push rod 112 with the measured position. The output end of the electric push rod 112 moves to drive the fixed block 113 to move. The fixed block 113 moves to drive the probe assembly 114 to move. The probe assembly 114 is used for detection, and the picture captured by the camera module is displayed on the display screen 2 in real time. The lighting module is used for fill light, and the crack width is measured by the infrared module.

[0031] See also Figure 1-Figure 8 On the basis of the above embodiment, in another embodiment of the present invention, a protective device and an auxiliary device are provided on the front side of the detector 1, and the protective device includes an insert block 20, a U-shaped block 21 and a No. 5 spring 22. The insert block 20 is slidably installed on the inner wall of the mounting groove, the U-shaped block 21 is slidably installed on the inner wall of the mounting groove, and the No. 5 spring 22 is arranged between the insert block 20 and the U-shaped block 21. The insert block 20 is reset by the arranged No. 5 spring 22, so that the plug 10 is fixed to prevent the plug 10 from being loosened by accidental contact with external force.

[0032] The protective device also includes a T-shaped block 23 and a latch 24. One side of the T-shaped block 23 is arranged on the inner wall of the installation groove, and the other side of the T-shaped block 23 is fixedly installed on the inner wall of the U-shaped block 21. The latch 24 slides through the inner and outer walls of the detector 1 so that the plug 10 can be taken out.

[0033] The protective device also includes a fixed cylinder 25, a sliding rod 26, a No. 6 spring 27 and a universal wheel 28. The fixed cylinder 25 is fixedly passed through the inner and outer walls of the fixed block 113, the sliding rod 26 slides through the inner and outer walls of the fixed cylinder 25, the universal wheel 28 is arranged on the top of the sliding rod 26, and the No. 6 spring 27 is arranged between the universal wheel 28 and the fixed cylinder 25. The movement of the universal wheel 28 is buffered by the No. 6 spring 27. Hydraulic oil is arranged inside the fixed cylinder 25, which can effectively reduce vibration and impact generated during mobile measurement, thereby protecting the parts inside the probe assembly 114 from damage caused by vibration.

[0034] The protective device also includes a piston block 29 and a fixing button 210. The piston block 29 is fixedly installed on the outer wall of the slide rod 26, and the fixing button 210 is fixedly installed on the bottom of the slide rod 26. A slot is opened on the surface of the piston block 29. The movement of the slide rod 26 drives the piston block 29 to move and also drives the fixing button 210 to move.

[0035] The auxiliary device includes a fixed plate 30, a limit rod 31, a baffle 32 and a slide plate 34. The fixed plate 30 is fixedly installed on the output end of the electric push rod 112, the limit rod 31 is fixedly installed on the circumferential surface of the fixed plate 30, the baffle 32 is rotatably installed on the inner wall of the fixed plate 30, and the slide plate 34 is slidably installed on the inner wall of the baffle 32. When measuring high cracks, the open baffle 32 can be used to protect the operator who is looking directly at the measured location to prevent dust or gravel generated during movement from falling and causing harm to the operator.

[0036] The auxiliary device also includes a knocking block 33, a trigger rod 35, a connecting rod 36 and a No. 7 spring 37. The knocking block 33 is slidably mounted on the inner wall of the baffle 32, the trigger rod 35 is fixedly mounted on the inner wall of the slide plate 34, one side of the connecting rod 36 is fixedly mounted on the bottom of the slide plate 34, and the other side of the connecting rod 36 slides through the inner and outer walls of the baffle 32. The No. 7 spring 37 is arranged between the baffle 32 and the slide plate 34. The slide plate 34 is reset by the arranged No. 7 spring 37. The knocking block 33 knocks the baffle 32 so that dust falling on the surface of the baffle 32 or the connection between the slide plate 34 and the baffle 32 is shaken off to prevent the dust from causing wear between the various components.

[0037] When the present embodiment is working, the plug 10 is inserted into the docking port of the detector 1. At this time, the outer wall of the plug 10 will contact the inclined surface of the plug block 20, causing the plug block 20 to move to the left. The movement of the plug block 20 will compress the No. 5 spring 22. When the docking slot and the plug block 20 are at the same level, the No. 5 spring 22 is released and drives the plug block 20 to insert into the docking slot. At this time, the plug 10 is fixed to prevent the plug 10 from being loosened by accidental external force. A loose plug 10 may cause unstable signal transmission. Ensuring the stability of the plug 10 can ensure the integrity and accuracy of the signal. By pressing the latch 24 to make it contact with the inclined surface of the T-shaped block 23, the T-shaped block 23 moves to the left. The movement of the T-shaped block 23 drives the U-shaped block 21 to move. The movement of the U-shaped block 21 will stretch the No. 5 spring 22. When the No. 5 spring 22 is stretched to a certain extent, it will drive the plug block 20 to move, causing the plug block 20 to be out of the docking slot. Only then can the plug 10 be taken out. The movement of the fixed block 113 drives the protective device to move. When the detection device is detecting, the universal wheel 28 contacts the inner wall of the mine cave so that the detection position of the detection device is supported. When encountering an uneven surface in the mine cave, the universal wheel 28 drives the slide bar 26 to move. The movement of the slide bar 26 drives the piston block 29 to move and compresses the No. 6 spring 27. At the same time, it also drives the fixed button 210 to move. The No. 6 spring 27 performs preliminary buffering. The movement of the piston block 29 compresses the hydraulic oil in the fixed cylinder 25. The hydraulic oil flows into the top of the piston block 29 through the slot. When the slide bar 26 is reset, the small slot slows down the reflux speed of the hydraulic oil, that is, the reset speed of the piston block 29 is slowed down. The slower the speed of the piston block 29, the slower the reset speed of the No. 6 spring 27. The vibration and impact generated during mobile measurement can be effectively reduced, thereby protecting the parts inside the probe assembly 114 from being damaged by vibration.

[0038] The movement of the fixing button 210 contacts the baffle 32 so that the baffle 32 rotates downward, and the rotation distance of the baffle 32 is limited by the limit rod 31. When measuring high cracks, the open baffle 32 can protect the operator who is looking directly at the measured location to prevent dust or gravel generated during the movement from falling and causing harm to the operator. When encountering deeper and wider cracks, the outer wall of the slide plate 34 contacts it, so that the slide plate 34 can be telescopically adjusted to cracks of different widths. The movement of the slide plate 34 drives the trigger rod 35 to move and drives the connecting rod 36 to move, while compressing the No. 7 spring 37. When the trigger rod 35 contacts the knocking block 33, the knocking block 33 rotates toward the baffle 32 and knocks the baffle 32. By knocking the baffle 32, dust that falls on the surface of the baffle 32 or at the connection between the slide plate 34 and the baffle 32 is shaken off, preventing the dust from causing wear between the various components.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crack width measuring device for use in mining, comprising a detector (1), characterized in that: The top of the detector (1) is provided with a display screen (2), the interior of the detector (1) is provided with a mounting slot, and the front side of the detector (1) is provided with a detection device, a protective device and an auxiliary device; The detection device comprises a plug (10), an electric wire (11), a round rod (12), a cylinder (13), a wire pressing rod (14), a fixed rod (15), a No. 1 spring (16), a cylinder (17), a slider 1 (18), a slider 2 (19), a moving block (110), a clamping plate (111), an electric push rod (112), a fixed block (113) and a probe assembly (114); the plug (10) is slidably mounted inside the detector (1); the electric wire (11) is arranged on the surface of the plug (10); the round rod (12) is rotatably mounted on the front side of the detector (1); the cylinder (13) is fixedly mounted on the surface of the detector (1); the wire pressing rod (14) is rotatably mounted on the inner wall of the cylinder (13); one side of the fixed rod (15) is fixedly mounted on the inner wall of the cylinder (13); the other side of the fixed rod (15) is fixedly mounted on the inner wall of the cylinder (13); One side is fixedly connected to the inner and outer walls of the wire pressing rod (14); the first spring (16) is arranged between the cylinder (13) and the wire pressing rod (14); the cylinder (17) is fixedly installed on the inner wall of the cylinder (13); the first slider (18) is slidably installed on the inner wall of the cylinder (17); the second slider (19) is slidably installed on the inner wall of the cylinder (17); the moving block (110) is slidably installed on the inner wall of the cylinder (13); the clamping plate (111) is fixedly installed on the bottom of the moving block (110); the electric push rod (112) is electrically connected to the detector (1) through the wire (11); the fixed block (113) is fixedly installed on the output end of the electric push rod (112); the probe assembly (114) is arranged on the top of the fixed block (113); and the probe assembly (114) includes a camera module, a lighting module and an infrared module.

2. A crack width measuring device for mining according to claim 1, characterized in that: A No. 2 spring is arranged between the slider 1 (18) and the cylinder (17), a No. 3 spring is arranged between the slider 2 (19) and the cylinder (17), a No. 4 spring is arranged between the moving block (110) and the cylinder (13), an anti-sliding block is arranged at the bottom of the clamping plate (111), the probe assembly (114) is electrically connected to the display screen (2), the interior of the cylinder (17) is arranged to be vacuum, and the outer wall of the plug (10) is provided with a docking groove.

3. A crack width measuring device for mining according to claim 2, characterized in that: The protective device comprises an insert block (20), a U-shaped block (21) and a No. 5 spring (22); the insert block (20) is slidably mounted on the inner wall of the mounting groove; the U-shaped block (21) is slidably mounted on the inner wall of the mounting groove; and the No. 5 spring (22) is arranged between the insert block (20) and the U-shaped block (21).

4. A crack width measuring device for mining according to claim 3, characterized in that: The protective device further comprises a T-shaped block (23) and a latch (24), one side of the T-shaped block (23) being arranged on the inner wall of the mounting groove, the other side of the T-shaped block (23) being fixedly mounted on the inner wall of the U-shaped block (21), and the latch (24) slidingly penetrating the inner and outer walls of the detector (1).

5. A crack width measuring device for mining according to claim 4, characterized in that: The protective device further comprises a fixed cylinder (25), a sliding rod (26), a No. 6 spring (27) and a universal wheel (28); the fixed cylinder (25) is fixedly passed through the inner and outer walls of the fixed block (113); the sliding rod (26) is slidably passed through the inner and outer walls of the fixed cylinder (25); the universal wheel (28) is arranged on the top of the sliding rod (26); the No. 6 spring (27) is arranged between the universal wheel (28) and the fixed cylinder (25); and hydraulic oil is arranged inside the fixed cylinder (25).

6. A crack width measuring device for mining according to claim 5, characterized in that: The protective device further comprises a piston block (29) and a fixing button (210), wherein the piston block (29) is fixedly mounted on the outer wall of the slide rod (26), the fixing button (210) is fixedly mounted on the bottom of the slide rod (26), and a slot is formed on the surface of the piston block (29).

7. A crack width measuring device for mining according to claim 6, characterized in that: The auxiliary device comprises a fixed plate (30), a limiting rod (31), a baffle (32) and a slide plate (34); the fixed plate (30) is fixedly mounted on the output end of the electric push rod (112); the limiting rod (31) is fixedly mounted on the circumferential surface of the fixed plate (30); the baffle (32) is rotatably mounted on the inner wall of the fixed plate (30); and the slide plate (34) is slidably mounted on the inner wall of the baffle (32).

8. A crack width measuring device for mining according to claim 7, characterized in that: The auxiliary device further comprises a knocking block (33), a trigger rod (35), a connecting rod (36) and a No. 7 spring (37); the knocking block (33) is slidably mounted on the inner wall of the baffle (32); the trigger rod (35) is fixedly mounted on the inner wall of the slide plate (34); one side of the connecting rod (36) is fixedly mounted on the bottom of the slide plate (34); the other side of the connecting rod (36) slides through the inner and outer walls of the baffle (32); and the No. 7 spring (37) is arranged between the baffle (32) and the slide plate (34).

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