Mine perpendicularity detection device

Abstract

The utility model relates to a mine perpendicularity detection device, which relates to the field of mine survey, and comprises a base, a dial, a pointer mechanism, an indexing mechanism and a zero setting mechanism, the dial is fixedly arranged in the middle of the base, the pointer mechanism is arranged on the surface of the dial, the indexing mechanism is in transmission connection with the pointer mechanism through a gear set, and the zero setting mechanism is arranged on the dial. The zero setting mechanism is in transmission connection with the dial, and the pointer mechanism can rotate on the surface of the dial. According to the utility model, the perpendicularity of a mine is detected by using gravity, the dial is subjected to zero adjustment by using the zero setting mechanism, and the deflection angle of the pointer mechanism is amplified on the indexing mechanism by using the gear set, so that the reading is more accurate.

Description

Technical Field

[0001] The utility model relates to the field of mine measurement, in particular to a mine verticality detection device. Background Art

[0002] Mine verticality detection is an important part of ensuring mine safety and production efficiency. Through mine verticality detection, deformation, deflection and other problems of the shaft or tank road can be discovered in time, thereby avoiding safety accidents caused by structural instability. Using traditional level rulers for measurement cannot measure the inclination angle of the mine, and cannot perform accurate measurement work.

[0003] At present, a Chinese utility model patent application with publication number CN221037409U and publication date May 28, 2024 proposes a mine verticality detection device, including a mounting block, a slider symmetrically slidably connected to the inside of the mounting block, a positioning rod rotatably connected between the two sets of sliders, a protractor fixedly connected to the end of the mounting block, and the protractor can measure the rotation angle of the positioning rod. The mounting block is set on a movable ball, a counterweight cone and a plumb rod are set below the movable ball, and a limiting screw is set on the side of the movable ball.

[0004] During use, under the action of the gravity of the counterweight cone, the movable ball can be pulled by the plumb rod to move inside the ball groove, the plumb rod is automatically adjusted to a vertical state, the limit screw is rotated to tighten the movable ball to achieve the limitation of the movable ball, and finally the mounting block is fixed on the movable ball to keep the mounting block in a horizontal state, and then the positioning rod is placed against the wall of the measured mine, and the verticality of the mine can be detected by reading on the protractor.

[0005] Regarding the above-mentioned related technologies, the protractor is fixed on the mounting block during use. Once the protractor tilts during installation or is bumped during use, causing the protractor to become skewed, the protractor itself will not be able to serve as a reference, resulting in large measurement errors when measuring the verticality of the mine. Utility Model Content

[0006] In order to solve the problem that when a verticality detection device is used, a reference scale of the device itself may deviate, the utility model provides a mine verticality detection device.

[0007] The utility model provides a mine verticality detection device, which adopts the following technical solutions:

[0008] A mine verticality detection device includes a base, a scale plate, a pointer mechanism and a zeroing mechanism, wherein a positioning column is provided on the base, and the positioning column is arranged in the middle position of the base; a first positioning hole is provided in the middle position of the scale plate, and the first positioning hole is sleeved on the positioning column, and the scale plate is also provided with scale lines and tooth grooves, and the scale lines and the tooth grooves are arranged on opposite sides of the scale plate; the zeroing mechanism includes a zeroing knob, a transmission rod and a bevel gear, the transmission rod is rotatably mounted on the base, one end of the transmission rod is connected to the zeroing knob, and the other end of the transmission rod is connected to the bevel gear, and the bevel gear is transmission-connected to the tooth groove on the scale plate; the pointer mechanism is rotatably mounted on the positioning column, the pointer mechanism is mounted on the surface of the scale plate, and the pointer mechanism is eccentrically arranged.

[0009] By adopting this technical solution, a positioning column is set on the base and an adjustable dial is installed on the positioning column. A zero adjustment mechanism connected to the dial is also installed on the base. When in use, the bevel gear can be rotated by turning the zero adjustment knob. The bevel gear and the tooth groove on the dial are matched to adjust the angle of the dial. The eccentric setting of the pointer mechanism can make the center of gravity of the pointer mechanism deviate to one end, so that the pointer mechanism can naturally point in the vertical downward direction. During adjustment, the zero scale line of the dial can be adjusted in the vertical downward direction according to the pointer mechanism pointing in the vertical downward direction, completing the zero adjustment of the dial. In this way, after the verticality detection device has been used for a period of time, the dial can be readjusted when the dial is pointing inaccurately, thereby ensuring the accuracy of the verticality detection device.

[0010] Optionally, a dividing mechanism is also installed on the positioning column, and the dividing mechanism includes a gear set, a dividing plate and a dividing pointer. The dividing plate is fixed to the end of the positioning column, and the dividing pointer is movably installed on the surface of the dividing plate. The gear set transmits the dividing pointer and the pointer mechanism.

[0011] By adopting this technical solution, when measuring the wall deviation of a mine, if the pointer mechanism points to a scale line on the dial but does not directly point to the scale line, the position of the pointer mechanism pointing to the scale line cannot be accurately read. At this time, the position of the pointer mechanism between the scale lines can be amplified by rotating the dividing pointer, and the mine deviation reading can be read more accurately, making the measurement result more accurate.

[0012] Optionally, the gear set includes a fixed gear, a moving gear and a speed gear, the fixed gear is fixed on the positioning column, the speed gear is movably installed on the pointer mechanism, the fixed gear is movably installed in the dividing plate, the fixed gear, the moving gear and the speed gear are transmission-connected, and the moving gear and the dividing pointer are fixedly connected.

[0013] By adopting this technical solution, a gear set is used to connect the pointer mechanism and the indexing pointer. The speed gear can amplify the rotation angle of the pointer mechanism. For every degree of deviation of the pointer mechanism on the scale plate, the indexing pointer rotates one circle on the scale plate. The scale plate is then evenly divided into 10 large areas, and the ten large areas are then evenly divided into 10 small areas. The angle of deviation of the mine can be accurately read to 0.01 degrees. The use of a gear set to amplify the rotation angle has a simple structure and is not easy to damage.

[0014] Optionally, the pointer mechanism includes a mounting portion and a pointer portion, a second positioning hole is provided in the middle position of the mounting portion, a movable bearing is also installed in the second positioning hole, the outer ring of the movable bearing is fixedly installed in the second positioning hole, the inner ring of the movable bearing is fixedly installed on the positioning column, the pointer mechanism is installed on the surface of the dial, and the center of gravity of the pointer mechanism is on the central axis of the pointer portion.

[0015] By adopting this technical solution, a movable bearing is installed between the pointer mechanism and the positioning column, which can make the pointer mechanism rotate more sensitively. By arranging the pointer part on one side of the mounting part, the center of gravity of the pointer mechanism can be biased toward the pointer part design, so that the central axis of the pointer and the center of gravity of the pointer mechanism coincide.

[0016] Optionally, a protective shell is further installed on the base, and the protective shell is fixedly installed on an end face where the positioning column is provided, and the protective shell is made of a transparent material.

[0017] By adopting this technical solution, a protective shell is used to protect the various structures installed on the base, which can prevent dust, sand and other debris from entering the various structures installed on the base, ensuring the overall precise operation of the device. At the same time, the use of transparent material to make the protective shell allows the user to clearly see the status of the dial and pointer through the protective shell, which will not affect the user's normal zeroing or reading.

[0018] Optionally, a limiting hole is further provided on the protective shell, and an elastic button is installed inside the limiting hole. The elastic button includes a connecting rod, a spring, a button and an extrusion block. The connecting rod passes through the limiting hole, and the button is connected to the end of the connecting rod away from the base. The extrusion block is installed at the end of the connecting rod close to the base, and both ends of the spring are respectively connected to the protective shell and the button.

[0019] This technical solution employs an elastic button mounted on the protective housing. When pressed, the button, via a connecting rod, forces an extrusion element to press against the upper surface of the pointer, securing the pointer in its current position. When the elastic button is released, the spring springs back into place, returning the extrusion element to its original position. This allows users to measure the inclination by pressing the elastic button and then bringing the device to their eye for a reading. The extrusion element, pressing against the pointer, holds it in place. Even if the device is removed during a reading, the pointer's position remains unchanged, making it more convenient for users to read the device.

[0020] Optionally, a sliding groove is further provided on the base, and the sliding groove is provided on a side surface perpendicular to the mounting surface of the positioning column. A wall-adhering portion is also slidably mounted on the sliding groove, and the wall-adhering portion is parallel to the zero scale line on the dial.

[0021] By adopting this technical solution, a movable and replaceable wall-adhering part is provided on the base. After the wall-adhering part has been used for a period of time, the wall-adhering part can be slid out from the base and replaced. This prevents the wall-adhering part from being worn out and becoming non-parallel to the zero scale line on the dial, resulting in excessive deflection angle of the pointer mechanism when measuring the verticality of the mine, causing reading errors. Setting the wall-adhering part as a replaceable structure can effectively improve the measurement accuracy and service life of the verticality detection device.

[0022] Optionally, a window is further provided on the pointer portion, the position of the window corresponds to the position of the scale line on the dial, and a convex lens is further provided on the window of the pointer portion.

[0023] By adopting this technical solution, when reading, you can quickly locate the scale pointed by the current pointer through the window and read the number on the window. At the same time, the convex lens installed on the window can act as a magnifying glass, making the reading on the dial clearer and reducing the error of human reading.

[0024] Optionally, two blocking parts are further provided on the base, the two blocking parts are provided below the positioning column, the two blocking parts are symmetrically provided on the inner side of the wall-adhering part, and the blocking parts are made of flexible material.

[0025] By adopting this technical solution, two blocking parts for limiting the swing of the pointer are provided on the base. The blocking parts can prevent the pointer from colliding or rubbing with the wall protection shell during the swinging process, thereby protecting the pointer.

[0026] In summary, the present invention has at least one of the following beneficial technical effects:

[0027] When in use, the dial can be adjusted by turning the zero adjustment knob. When adjusting, the dial can be adjusted according to the pointer mechanism pointing to the vertical downward direction, so that the zero scale line of the dial is in the vertical downward direction, and the zero adjustment of the dial is completed. The dial can be readjusted when the direction of the dial is inaccurate to ensure the accuracy of the verticality detection device.

[0028] By setting a graduation mechanism to amplify the deflection angle of the pointer mechanism on the scale line, the degree of mine deviation can be read more accurately, making the measurement result more accurate.

[0029] An elastic button is installed on the protective shell to fix the position of the pointer mechanism, making it convenient for the user to bring the detection device to his or her eyes for reading when the verticality measurement of the mine is completed.

[0030] By setting a window on the pointer mechanism, when reading, you can quickly locate the scale currently pointed by the pointer through the window and read the scale on the window. At the same time, the convex lens installed on the window can act as a magnifying glass, making the reading on the dial clearer and reducing the error of human reading. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0032] Figure 2 This is an exploded schematic diagram of the structure of an embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of the installation position of the dial and pointer mechanism of the embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the dial and zero adjustment mechanism of the embodiment of the utility model;

[0035] Figure 5 This is a schematic diagram of the pointer mechanism of an embodiment of the utility model;

[0036] Figure 6 It is a schematic diagram of an elastic button according to an embodiment of the present utility model.

[0037] Explanation of the accompanying drawings: 1. Base; 101. Sliding groove; 102. Positioning column; 103. Wall-mounted portion; 104. Blocking portion; 2. Dial; 201. First positioning hole; 202. Tooth groove; 3. Pointer mechanism; 301. Mounting portion; 302. Pointer portion; 303. Second positioning hole; 304. Window; 4. Indexing mechanism; 401. Gear set; 4011. Fixed gear; 4012. Moving gear; 4013. Speed-changing gear; 402. Dial; 403. Indexing pointer; 5. Protective shell; 501. Limiting hole; 6. Zero adjustment mechanism; 601. Zero adjustment knob; 602. Transmission rod; 603. Bevel gear; 7. Elastic button; 701. Button; 702. Spring; 703. Connecting rod; 704. Extrusion block; 8. Movable bearing DETAILED DESCRIPTION

[0038] The following combination Figures 1 to 6 The utility model is described in further detail.

[0039] The present utility model discloses a mine verticality detection device. Figures 1 to 2 A mine verticality detection device mainly includes a base 1, a dial 2, a pointer mechanism 3, a dividing mechanism 4 and a zeroing mechanism 6. The dial 2 is fixedly installed in the middle position of the base 1, the pointer mechanism 3 is installed on the surface of the dial 2, the dividing mechanism 4 is fixedly installed on the base 1, and the zeroing mechanism 6 is arranged on an end surface of the base 1 that is perpendicular to the dial 2, wherein the pointer mechanism 3 can rotate on the surface of the dial 2, the dividing mechanism 4 and the pointer mechanism 3 are transmission-connected, and the zeroing mechanism 6 is coordinated with the dial 2.

[0040] Reference Figures 1 to 2 The base 1 is a rectangular parallelepiped structure, equipped with a sliding groove 101, a positioning post 102, and a blocking portion 104. A circular groove is provided in the middle of the base 1. The positioning post 102 is perpendicular to the positioning groove and fixedly installed in the center of the positioning groove. The sliding groove 101 is a square groove opened on the side of the base 1. There are two sliding grooves 101, each set on the end surface of the base 1 perpendicular to the positioning groove. The blocking portion 104 is a cylindrical column made of PET material and is glued to one side of the positioning groove. The positioning groove and positioning post 102 can play a certain limiting role during the subsequent installation of the dial 2 and pointer mechanism 3, better fixing the dial 2 and pointer mechanism 3 in their current position.

[0041] Reference Figures 1 to 2The wall-adhering portion 103 is a planar structure slidably mounted in the sliding groove 101 on the base 1. A square protrusion is provided on one end face of the wall-adhering portion 103, which is used to be slidably mounted in the sliding groove 101 on the base 1. After the wall-adhering portion 103 is mounted on the base 1, the side away from the base 1 is parallel to the zero scale line of the dial 2. By setting the wall-adhering portion 103 as a structure that can be detachably mounted on the base 1, the old wall-adhering portion 103 can be removed and replaced with a new wall-adhering portion 103 after the wall-adhering portion 103 is worn out after being used for a period of time, so as to prevent the wall-adhering portion 103 from being non-parallel to the zero scale line on the dial 2 after being worn, resulting in a large error in the reading due to the wall-adhering portion 103 not being parallel to the zero scale line when measuring the verticality of the mine wall.

[0042] Reference Figures 1 to 3 The pointer mechanism 3 includes a mounting portion 301, a pointer portion 302 and a window 304. The mounting portion 301 is a circular structure in the middle position of the pointer mechanism 3. A second positioning hole 303 is provided in the middle position of the mounting portion 301. A movable bearing 8 is installed in the second positioning hole 303. The outer ring of the movable bearing 8 is fixed inside the second positioning hole 303. The inner ring of the movable bearing 8 is installed on the positioning column 102. The pointer portion 302 is arranged on one side of the circular structure. The window 304 is arranged on the pointer portion 302. The window 304 is a rectangular frame that passes through the pointer portion 302. The position of the window 304 corresponds to the position of the scale line on the dial 2. A magnifying glass is also installed on the window 304. By setting the pointer mechanism 3 as the mounting portion 301 and the pointer portion 302, the center of the pointer mechanism 3 can be set on the pointer portion 302, so that the pointer mechanism 3 can naturally point to the vertical downward direction under the action of gravity. A window 304 is set on the pointer portion 302, and a magnifying glass is installed on the window 304, so that the user can quickly locate the scale currently pointed by the pointer portion 302 through the window 304 to read the reading. The magnifying glass can make the reading clearer and reduce the error generated when reading.

[0043] Reference Figures 1 to 3The indexing mechanism 4 includes a gear set 401, a dividing plate 402 and a dividing pointer 403. The dividing plate 402 is fixedly arranged at the end of the positioning column 102 through a clamping structure. The dividing pointer 403 is movably mounted on the dividing plate 402. The gear set 401 includes a fixed gear 4011, a movable gear 4012 and a speed change gear 4013. The fixed gear 4011 is fixed on the positioning column 102. The speed change gear 4013 is movably mounted on the pointer mechanism 3, and the speed change gear 40 The smaller gear on the indexing plate 4013 meshes with the fixed gear 4011 on the positioning column 102, and the moving gear 4012 is movably installed inside the indexing plate 402. The moving gear 4012 meshes with the larger gear on the speed change gear 4013. The indexing pointer 403 is fixed to the moving gear 4012 through a clamping structure. The indexing pointer 403 and the moving gear 4012 are coaxially arranged. When the pointer mechanism 3 rotates, the smaller gear on the speed change gear 4013 meshes with the fixed gear 4011, and the guide The speed change gear 4013 rotates with the rotation of the pointer mechanism 3. The larger gear on the speed change gear 4013 meshes with the moving gear 4012 in the indexing disk 402, which drives the moving gear 4012 to rotate. The moving gear 4012 and the indexing pointer 403 are fixed coaxially, and the indexing pointer 403 rotates with the moving gear 4012. Since the indexing pointer 403 meshes with the larger gear on the speed change pointer and the smaller gear on the speed change gear 4013 meshes with the fixed gear 4011, the rotation amplitude of the indexing pointer 403 will be greater than the rotation amplitude of the pointer mechanism 3, thereby amplifying the rotation angle of the pointer mechanism 3, so that for every degree of rotation of the pointer mechanism 3 on the scale plate 2, the indexing pointer 403 rotates one circle on the indexing disk 402, and then the indexing disk 402 is evenly divided into 10 large areas, and then the ten large areas are evenly divided into 10 small areas. The angle of deviation of the mine wall can be accurately determined to 0.01 degrees when reading.

[0044] Reference Figures 1 to 3 The base 1 is also provided with a protective shell 5, which is mounted on one end face of the base 1 where the dial 2 is mounted. The protective shell 5 is made of a transparent material and has a limit hole 501 vertically above the pointer. An elastic button 7 is mounted in the limit hole 501. The transparent protective shell 5 provides protection without affecting the user's reading.

[0045] Reference Figures 1 to 3The elastic button 7 includes a button 701, a spring 702, a connecting rod 703, and an extrusion block 704. The button 701 is disposed outside the protective housing 5. One end of the connecting rod 703 is connected to the button 701, and the connecting rod 703 passes through the limiting hole 501. The extrusion block 704 is threadedly mounted on the other end of the connecting rod 703. The spring 702 is disposed between the button 701 and the protective housing 5. The elastic button 7 can fix the pointer in its current position via the extrusion block 704, making it easier for the user to bring the verticality detection device to their eyes for reading, making it more convenient to use.

[0046] Reference Figures 1 to 4 The zero adjustment mechanism 6 includes a zero adjustment knob 601, a transmission rod 602, and a gear. The zero adjustment knob 601 is disposed on an end surface of the base 1 perpendicular to the wall-mounted portion 103 and the end surface on which the scale plate 2 is disposed. The base 1 also includes a through hole connecting the zero adjustment knob 601 to the positioning slot. The transmission rod 602 is movably mounted in the through hole. One end of the transmission rod 602 is threadedly connected to the zero adjustment knob 601, and the gear is connected to the other end of the transmission rod 602. The provision of the zero adjustment mechanism 6 simplifies scale calibration, allowing users to quickly calibrate the scale plate 2 before use.

[0047] Reference Figures 1 to 6 A first positioning hole 201 and a tooth groove 202 are provided on the dial 2. The dial 2 is a cylindrical structure, and the diameter of the dial 2 is the same as the diameter of the positioning groove. The thickness of the dial 2 is the same as the depth of the positioning groove. The first positioning hole 201 is set at the center of the dial 2. The diameter of the first positioning hole 201 is the same as the diameter of the positioning column 102. Scale lines are evenly arranged on one end face of the dial 2, and the middle position of the scale lines is the zero scale line. The tooth grooves 202 are evenly arranged on one end face of the dial 2 away from the scale lines. The position of the tooth grooves 202 is coordinated with the bevel gear 603 of the zero adjustment mechanism 6.

[0048] The specific implementation principle of this embodiment is as follows: before use, the transmission rod 602 of the zero adjustment mechanism 6 is installed in the through hole provided on the base 1, and the gear and the zero adjustment knob 601 are connected to the two ends of the transmission rod 602. Then, the dial 2 is installed on the positioning groove, and the end surface of the dial 2 provided with the tooth groove 202 is installed inward. The pointer mechanism 3 is installed above the dial 2. Each gear of the gear set 401 is meshed, and the indexing plate 402 is installed and fixed. The indexing pointer 403 is installed on the surface of the indexing plate 402. Finally, the elastic button 7 is installed on the protective shell 5 and the protective shell 5 is fixed above the base 1. Before use First, place the verticality detection device vertically, turn the zero adjustment knob 601 to make the zero scale line of the dial 2 point to the same direction as the pointer part 302 to complete zero adjustment. When in use, place the wall-adhering part 103 close to the wall of the mine, press the elastic button 7 to lock the pointer mechanism 3 in the current position, and bring the verticality detection device to your eyes to read through the window 304. When reading, if the pointer part 302 and the dividing pointer 403 both point to the zero scale line, it proves that the mine wall is vertical. Otherwise, the scale pointed by the pointer part 302 on the dial 2 plus the scale pointed by the dividing pointer 403 on the dividing disk 402 is the angle between the mine wall and the vertical direction.

[0049] In summary, the present embodiment detects the verticality of the mine by using gravity. When in use, the zero scale line of the dial 2 can be adjusted according to the pointer mechanism 3 pointing to the vertical downward direction to complete the zeroing of the dial 2. In this way, the dial 2 can be readjusted to zero when the direction of the dial 2 is inaccurate, thereby ensuring the accuracy of the verticality detection device; by setting the dividing plate 402 and the dividing pointer 403, the reading of the pointer mechanism 3 on the dial 2 is amplified, and the reading of the deviation of the mine wall is read more accurately, making the measurement result more accurate; by setting a window 304 and a magnifying glass on the pointer part 302, when in use, the scale pointed by the current pointer part 302 can be quickly located through the window 304, and the reading can be amplified by the magnifying glass, which is more convenient for reading; by setting the elastic button 7, the position of the pointer mechanism 3 is fixed, which is convenient for the user to hold the verticality detection device in front of his eyes for reading during measurement.

[0050] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mine verticality detection device, characterized by: It comprises a base (1), a dial (2), a pointer mechanism (3) and a zero adjustment mechanism (6), A positioning column (102) is provided on the base (1), and the positioning column (102) is arranged in the middle position of the base (1); A first positioning hole (201) is provided in the middle of the scale plate (2), and the first positioning hole (201) is sleeved on the positioning column (102). The scale plate (2) is also provided with scale lines and tooth grooves (202), and the scale lines and tooth grooves (202) are provided on opposite sides of the scale plate (2); The zero adjustment mechanism (6) comprises a zero adjustment knob (601), a transmission rod (602) and a bevel gear (603); the transmission rod (602) is rotatably mounted on the base (1); one end of the transmission rod (602) is connected to the zero adjustment knob (601); the other end of the transmission rod (602) is connected to the bevel gear (603); and the bevel gear (603) is transmission-connected to the tooth groove (202) on the scale plate (2); The pointer mechanism (3) is rotatably mounted on the positioning column (102), the pointer mechanism (3) is mounted on the surface of the scale plate (2), and the pointer mechanism (3) is eccentrically arranged.

2. A mine verticality detection device according to claim 1, characterized in that: The positioning column (102) is also provided with an indexing mechanism (4), the indexing mechanism (4) comprising a gear set (401), a dividing plate (402) and a dividing pointer (403), the dividing plate (402) being fixed to the end of the positioning column (102), the dividing pointer (403) being movably mounted on the surface of the dividing plate (402), and the gear set (401) connecting the dividing pointer (403) and the pointer mechanism (3) in a transmission manner.

3. A mine verticality detection device according to claim 2, characterized in that: The gear set (401) comprises a fixed gear (4011), a movable gear (4012) and a speed gear (4013); the fixed gear (4011) is fixed on the positioning column (102); the speed gear (4013) is movably mounted on the pointer mechanism (3); the fixed gear (4011) is movably mounted in the indexing plate (402); the fixed gear (4011), the movable gear (4012) and the speed gear (4013) are in transmission connection; the movable gear (4012) and the indexing pointer (403) are fixedly connected.

4. A mine verticality detection device according to any one of claims 1 to 3, characterized in that: The pointer mechanism (3) comprises a mounting portion (301) and a pointer portion (302); a second positioning hole (303) is provided in the middle of the mounting portion (301); a movable bearing (8) is further installed in the second positioning hole (303); an outer ring of the movable bearing (8) is fixedly installed in the second positioning hole (303); an inner ring of the movable bearing (8) is fixedly installed on the positioning column (102); the pointer mechanism (3) is installed on the surface of the scale plate (2); and the center of gravity of the pointer mechanism (3) is on the central axis of the pointer portion (302).

5. A mine verticality detection device according to any one of claims 1 to 3, characterized in that: A protective shell (5) is also installed on the base (1). The protective shell (5) is fixedly installed on an end face provided with the positioning column (102). The protective shell (5) is made of a transparent material.

6. A mine verticality detection device according to claim 5, characterized in that: The protective shell (5) is further provided with a limiting hole (501), an elastic button (7) is installed inside the limiting hole (501), and the elastic button (7) comprises a connecting rod (703), a spring (702), a button (701) and an extrusion block (704), the connecting rod (703) passes through the limiting hole (501), the button (701) is connected to an end of the connecting rod (703) away from the base (1), the extrusion block (704) is installed at an end of the connecting rod (703) close to the base (1), and the two ends of the spring (702) are respectively connected to the protective shell (5) and the button (701).

7. A mine verticality detection device according to any one of claims 1 to 3, characterized in that: The base (1) is further provided with a sliding groove (101), which is provided on a side surface perpendicular to the mounting surface of the positioning column (102). A wall-adhering portion (103) is also slidably mounted in the sliding groove (101), and the wall-adhering portion (103) is parallel to the zero scale line on the scale plate (2).

8. The mine verticality detection device according to claim 4, characterized in that: The pointer portion (302) is further provided with a viewing window (304), the position of the viewing window (304) corresponding to the position of the scale line on the scale plate (2), and a convex lens is further provided on the viewing window (304) of the pointer portion (302).

9. The mine verticality detection device according to claim 7, characterized in that: The base (1) is further provided with two blocking portions (104), the two blocking portions (104) being arranged below the positioning column (102), and the two blocking portions (104) being symmetrically arranged inside the wall-adhering portion (103), and the blocking portions (104) being made of a flexible material.

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