Automatic lowering traction device of array displacement meter

Abstract

An automatic lowering traction device of an array type displacement meter comprises an inclinometer pre-buried underground, the array type displacement meter and a traction device, a plurality of clamping grooves are evenly formed in the inner wall of the inclinometer, the traction device comprises a traction cylinder, a positioning guide wheel, a traction wheel and a driving device, a plurality of first mounting grooves are formed in the outer wall of the traction cylinder, and a plurality of second mounting grooves are formed in the outer wall of the traction cylinder. The positioning guide wheels are arranged in the first mounting grooves through first mounting devices, a plurality of second mounting grooves are formed in the outer wall of the traction cylinder, the traction wheels are arranged in the second mounting grooves through second mounting devices, and a driving cavity is formed in the position, between every two second mounting grooves, in the traction cylinder; the driving device is arranged in the driving cavity to drive the traction wheel to rotate, and the array type displacement meter is fixed to the top of the traction cylinder through a bolt. According to the utility model, the array type displacement meter can be automatically lowered, the working difficulty and intensity of installation personnel are reduced, and the possibility that the array type displacement meter is damaged in the lowering process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lowering devices for array-type displacement meters, in particular to an automatic lowering and traction device for an array-type displacement meter. Background Art

[0002] As an efficient measurement tool, array displacement meters play an important role in various deformation monitoring tasks. They are widely used in fields ranging from geological safety monitoring to transportation facility monitoring, as well as water conservancy dams, construction, and aerospace, and can provide accurate data support. However, in actual applications, the installation and recovery of array displacement meters are generally done manually. Since array displacement meters have many sections, when they are lowered, as the length at the bottom increases, the weight will also increase. It is necessary to keep the subsequent sensors tightened to prevent them from falling into the inclinometer hole. Since the situation inside the hole cannot be observed, there may be a jamming situation, resulting in installation failure.

[0003] Chinese patent document CN220437380U discloses an installation and recovery device for an array displacement meter, comprising an inclinometer tube and an array displacement meter. The installation and recovery device comprises a compressed air bag, a fixed block, an air pipe, and an air pump, wherein the compressed air bag is placed at the bottom of the inclinometer tube, the diameter of the fixed block is smaller than the inner diameter of the inclinometer tube, the fixed block is pressed on top of the compressed air bag, and the fixed block is provided with an air pipe through hole and a mounting hole along the height direction. The array displacement meter is fixed on the mounting hole, and the inflation hole of the compressed air bag is connected to the air pump. The array displacement meter is recovered by the rebound of the air bag, ensuring that the thrust for recovering the array displacement meter is always along the axis of the inclinometer tube, thus solving the problem that the array displacement meter is difficult to recover when the inclinometer tube is slightly bent. However, the above device only provides a recovery device for the array displacement meter, so the present utility model proposes an automatic lowering and traction device for an array displacement meter that can automatically lower and recover the array displacement meter. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic lowering and traction device for an array displacement meter, which can automatically lower and recover the array displacement meter, reduce the difficulty and intensity of the work of the installer, and reduce the possibility of damage to the array displacement meter during the lowering project.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A traction device for automatically lowering an array displacement meter comprises an inclinometer tube pre-buried underground, an array displacement meter and a traction device, wherein the inner wall of the inclinometer tube is evenly provided with a plurality of slots, and the traction device comprises a traction cylinder, a positioning guide wheel, a traction wheel and a driving device, a first mounting hole is provided on the top of the traction cylinder, a plurality of first mounting slots are provided on the outer wall of the traction cylinder, the positioning guide wheel is arranged in the first mounting slot via a first mounting device, a plurality of second mounting slots are provided on the outer wall of the traction cylinder, the traction wheel is arranged in the second mounting slot via a second mounting device, a driving cavity is provided in the traction cylinder between the two second mounting slots, the driving device is arranged in the driving cavity to drive the traction wheel to rotate, and the array displacement meter is fixed to the top of the traction cylinder by bolts.

[0007] As a preferred technical solution, the slot vertically penetrates the inner wall of the inclinometer tube.

[0008] As an optimal technical solution, a detachable lifting ring is provided at the bottom of the traction cylinder, and a spare lifting ring and a spare through hole are provided at the top of the traction cylinder.

[0009] As a preferred technical solution, the first mounting grooves are divided into two groups, and the two groups of first mounting grooves are arranged up and down on the traction cylinder, and each group of first mounting grooves includes two symmetrically arranged first mounting grooves. The second mounting grooves are divided into two groups, and the two groups of second mounting grooves are arranged up and down on the traction cylinder, and each group of second mounting grooves includes two symmetrically arranged second mounting grooves, and the angle between the first mounting groove and the adjacent second mounting groove is 90°.

[0010] As a preferred technical solution, the first mounting device includes a first rotating shaft, a first mounting block and several first springs, sliding grooves are provided on both sides of the first mounting groove, the first rotating shaft is fixedly connected to the positioning guide wheel, the first mounting block can be slidably set in the sliding groove, one end of the first spring is fixedly connected to the side of the first mounting block away from the outer wall of the traction cylinder, the other end of the first spring is fixedly connected to the side wall of the sliding groove away from the outer wall of the traction cylinder, and the two ends of the first rotating shaft are rotatably connected to the first mounting block through bearings.

[0011] As a preferred technical solution, the second mounting device includes a second rotating shaft, a second mounting block and a plurality of second springs, and sliding grooves are provided on both sides of the second mounting groove. The second tail rotating shaft is fixedly connected to the traction wheel, and the second mounting block can be slidably set in the sliding groove. One end of the second spring is fixedly connected to the side of the second mounting block away from the outer wall of the traction cylinder, and the other end of the second spring is fixedly connected to the side wall of the sliding groove away from the outer wall of the traction cylinder. The two ends of the second rotating shaft are rotatably connected to the second mounting block through bearings.

[0012] As an optimal technical solution, the driving device includes two first sprockets, a chain, a driving shaft, two second sprockets, a motor and a driven shaft. The two first sprockets are sleeved on the same side of the second rotating shafts of the two symmetrically arranged traction wheels. The motor is fixedly arranged in the driving cavity. One end of the driving shaft is fixedly connected to the output end of the motor, and the other end of the driving shaft is rotatably connected to the side wall of the driving cavity. Both ends of the driven shaft are connected to the side wall of the driving cavity through a third mounting device. The two second sprockets are sleeved on the driving shaft and the driven shaft, and the chain is sleeved on the outside of the two first sprockets and the two second sprockets. The chain is engaged with the two first sprockets and the two second sprockets at the same time.

[0013] As a preferred technical solution, the third mounting device includes a vertical groove, a third spring and a slider. The vertical groove is arranged on the side walls of the driving cavity at both ends of the driven shaft. The slider can be slidably arranged in the vertical groove. The two ends of the driven shaft are rotatably connected to the slider through bearings. One end of the third spring is fixedly connected to the bottom of the slider, and the other end of the third spring is fixedly connected to the bottom of the vertical groove.

[0014] As a preferred technical solution, a second mounting hole is provided on the top of the array displacement meter.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, a motor is used to drive the traction wheel to control the up and down movement of the traction device in the inclinometer casing. The installer does not need to pull the subsequent array displacement meter all the time, which reduces the requirements for the installer's physical strength and experience and is easy to operate.

[0017] 2. In the present invention, the positioning guide wheel can be inserted into the slot of the inclinometer tube to confirm the lowering direction, thereby preventing the array displacement meter from moving or rotating during the lowering process, thereby preventing the internal sensor from being damaged.

[0018] 3. In the present invention, multiple sets of springs are provided, so that the traction wheel and the positioning guide wheel can be extended and retracted relative to the outer wall of the traction tube, so that the traction device can adapt to inclinometer tubes of different diameters. Under the action of the springs, the traction wheel and the positioning guide wheel can always be in close contact with the inner wall of the inclinometer tube, preventing the traction device from falling suddenly.

[0019] 4. In the present invention, the traction device can be set at the bottom of the array displacement meter. When the inclination hole is long, the traction device can be added and set in the middle of the array displacement meter to ensure that the array displacement meter is lowered smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the use of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the utility model;

[0023] Figure 3 This is a cross-sectional view of the utility model;

[0024] Figure 4 This is a top view of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the inclinometer tube of the utility model;

[0026] The reference numerals are as follows:

[0027] 1-traction cylinder, 2-lifting ring, 3-first mounting hole, 4-spare lifting ring, 5-spare through hole, 6-positioning guide wheel, 7-first mounting groove, 8-first rotating shaft, 9-first mounting block, 10-first spring, 11-traction wheel, 12-second mounting groove, 13-second rotating shaft, 14-second mounting block, 15-second spring, 16-first sprocket, 17-chain, 18-driving shaft, 19-second sprocket, 20-motor, 21-driven shaft, 22-drive chamber, 23-vertical groove, 24-third spring, 25-array displacement meter, 26-second mounting hole, 27-inclinometer tube, 28-slot. DETAILED DESCRIPTION

[0028] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but rather merely represents selected embodiments of the present application. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without making any creative effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0030] In the description of this application, it should be noted that if the terms "center", "upper", "lower", "inner", "outer" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, if the terms "set", "install", and "connect" appear, they should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Example

[0032] like Figure 1-5 As shown, an automatic lowering traction device for an array displacement meter 25 includes an inclinometer tube 27 pre-buried underground, an array displacement meter 25 and a traction device. A plurality of slots 28 are evenly provided on the inner wall of the inclinometer tube 27. The traction device includes a traction cylinder 1, a positioning guide wheel 6, a traction wheel 11 and a driving device. A first mounting hole 3 is provided on the top of the traction cylinder 1, a plurality of first mounting grooves 7 are provided on the outer wall of the traction cylinder 1, the positioning guide wheel 6 is arranged in the first mounting groove 7 through the first mounting device, a plurality of second mounting grooves 12 are provided on the outer wall of the traction cylinder 1, the traction wheel 11 is arranged in the second mounting groove 12 through the second mounting device, a driving cavity 22 is provided in the traction cylinder 1 between the two second mounting grooves 12, the driving device is arranged in the driving cavity 22 to drive the traction wheel 11 to rotate, and the array displacement meter 25 is fixed to the top of the traction cylinder 1 by bolts.

[0033] It is worth noting that the inclinometer tube 27 is pre-buried underground where measurements are to be taken, and works in conjunction with the array displacement meter 25 to achieve high-precision measurements. A traction device is provided to assist in lowering the array displacement meter 25. Specifically, the first mounting hole 3 facilitates connection with the array displacement meter 25. The positioning guide wheel 6 can be inserted into the slot 28 of the inclinometer tube 27 to determine the position of the array displacement meter 25 for automatic lowering. The first mounting device ensures that the positioning guide wheel 6 rolls within the slot 28. The positioning guide wheel 6 can also extend and retract relative to the first mounting slot 7, ensuring that the positioning guide wheel 6 always adheres to the sidewall of the slot 28. The second mounting device ensures that the traction wheel 11 always adheres to the wall of the inclinometer tube 27. Simultaneously, the driving device drives the traction wheel 11 to rotate, thereby controlling the traction device's ascent and descent relative to the inclinometer tube 27.

[0034] In particular, the first mounting hole 3 can also be used for leading the power supply cable of the driving device into the array displacement meter 25 and connecting with the power supply cable of the array displacement meter 25 to share the power supply.

[0035] In some feasible embodiments, the slot 28 vertically penetrates the inner wall of the inclinometer casing 27 .

[0036] In some feasible embodiments, a detachable lifting ring 2 is provided at the bottom of the traction drum 1, and a spare lifting ring 42 is provided at the top of the traction drum 1. The lifting ring 2 at the bottom can be hung on an osmotic pressure sensor for measuring seepage water or static pressure, and the spare lifting ring 42 is used to fix a safety rope when the traction device is lowered and traction is performed.

[0037] In some feasible embodiments, a second mounting hole 26 is provided on the top of the array displacement meter 25 to facilitate connection with the traction device, and the power supply cable inside the array displacement meter 25 can be led out through the second mounting hole 26.

[0038] It should be noted that when the array displacement meter 25 has a large number of unit segments, in order to ensure the smooth lowering of the array displacement meter 25 and reduce the workload of the installers, a traction device will be installed in the middle position of the multi-section array displacement meter 25. At this time, the bottom lifting ring 2 can be removed, and the bottom of the traction tube 1 can be aligned with the second mounting hole 26 at the top of the array displacement meter 25, and fixed with bolts.

[0039] In some feasible embodiments, a spare through hole 5 is provided on the top of the traction cylinder 1. When the traction device is used independently to pre-clear the inclinometer casing 27, the spare through hole 5 is used to lead out the power supply cable of the drive device in the traction device.

[0040] In some feasible embodiments, the first mounting grooves 7 are divided into two groups, and the two groups of first mounting grooves 7 are arranged up and down on the traction cylinder 1, and each group of first mounting grooves 7 includes two symmetrically arranged first mounting grooves 7. The second mounting grooves 12 are divided into two groups, and the two groups of second mounting grooves 12 are arranged up and down on the traction cylinder 1, and each group of second mounting grooves 12 includes two symmetrically arranged second mounting grooves 12, and the angle between the first mounting groove 7 and the adjacent second mounting groove 12 is 90°.

[0041] In some feasible embodiments, the first mounting device includes a first rotating shaft 8, a first mounting block 9, and a plurality of first springs 10. Slide grooves are defined on both sides of the first mounting slot 7. The first rotating shaft 8 is fixedly connected to the positioning guide wheel 6. The first mounting block 9 is slidably disposed within the slide grooves. One end of the first spring 10 is fixedly connected to the side of the first mounting block 9 away from the outer wall of the traction cylinder 1. The other end of the first spring 10 is fixedly connected to the side wall of the slide groove away from the outer wall of the traction cylinder 1. Both ends of the first rotating shaft 8 are rotatably connected to the first mounting block 9 via bearings. When the positioning guide wheel 6 rolls up and down within the slot 28 of the inclinometer tube 27, the first springs 10 act to enable the positioning guide wheel 6 to adapt to different diameters of the inclinometer tube 27, ensuring that the positioning guide wheel 6 always closely adheres to the side wall of the slot 28.

[0042] In some feasible embodiments, the second mounting device includes a second rotating shaft 13, a second mounting block 14, and a plurality of second springs 15. Slide grooves are defined on both sides of the second mounting slot 12. The tail rotating shaft is fixedly connected to the traction wheel 11. The second mounting block 14 is slidably disposed within the slide grooves. One end of the second spring 15 is fixedly connected to the side of the second mounting block 14 away from the outer wall of the traction cylinder 1. The other end of the second spring 15 is fixedly connected to the side of the slide groove away from the outer wall of the traction cylinder 1. Both ends of the second rotating shaft 13 are rotatably connected to the second mounting block 14 via bearings. When the traction wheel 11 rolls up and down along the inner wall of the inclinometer casing 27 under the drive device, the second springs 15 ensure that the traction wheel 11 always adheres closely to the inner wall of the inclinometer casing 27.

[0043] In particular, the width of the traction wheel 11 is greater than the width of the slot 28 in the inclinometer tube 27, which prevents the traction wheel 11 from being stuck in the slot 28, resulting in excessive friction on both sides of the traction wheel 11 and affecting the ascent and descent of the traction device.

[0044] In some feasible embodiments, the driving device includes two first sprockets 16, a chain 17, a driving shaft 18, two second sprockets 19, a motor 20 and a driven shaft 21. The two first sprockets 16 are sleeved on the same side of the second rotating shaft 13 of the two symmetrically arranged traction wheels 11, the motor 20 is fixedly arranged in the driving cavity 22, one end of the driving shaft 18 is fixedly connected to the output end of the motor 20, and the other end of the driving shaft 18 is rotatably connected to the side wall of the driving cavity 22. Both ends of the driven shaft 21 are connected to the side wall of the driving cavity 22 through a third mounting device, the two second sprockets 19 are sleeved on the driving shaft 18 and the driven shaft 21, the chain 17 is sleeved on the outside of the two first sprockets 16 and the two second sprockets 19, and the chain 17 is engaged with the two first sprockets 16 and the two second sprockets 19 at the same time. The motor 20 drives the driving shaft 18 to rotate, and the second sprocket 19 on the driving shaft 18 rotates accordingly. The second sprocket 19 drives the chain 17 to move, and then drives the two first sprockets 16 to rotate, thereby driving the two traction wheels 11 to rotate.

[0045] Since the traction wheel 11 can be extended and retracted relative to the second mounting slot 12, and the driven shaft 21 can be moved up and down by the third mounting device, when the traction wheel 11 is extended and retracted, the driven shaft 21 can also be moved up and down at the same time, ensuring that the chain 17 is always taut, driving the two first sprockets 16 to rotate.

[0046] In some feasible embodiments, the third mounting device includes a vertical slot 23, a third spring 24, and a slider. The vertical slots 23 are provided on the sidewalls of the drive cavity 22 at both ends of the driven shaft 21. The slider is slidably disposed within the vertical slot 23. The driven shaft 21 is rotatably connected to the slider at both ends via bearings. One end of the third spring 24 is fixedly connected to the bottom of the slider, and the other end of the third spring 24 is fixedly connected to the bottom of the vertical slot 23. When the traction wheel 11 retracts inward relative to the second mounting slot 12, the chain 17 is relaxed. At this time, the driven shaft 21 moves downward under the action of the third spring 24, tightening the chain 17.

[0047] It should be noted that the elastic potential energy of the third spring 24 is less than that of the second spring 15, and the third spring 24 is a tension spring. When subjected to tension, it generates a reverse tension in an attempt to restore the traction wheel 11. When the traction wheel 11 is forced to retract inward, the chain 17 relaxes, and the tension exerted by the chain 17 on the third spring 24 decreases, causing the third spring 24 to partially retract, driving the driven shaft 21 downward until the chain 17 is tightened again. Because the elastic potential energy of the third spring 24 is less than that of the second spring 15, the tension generated by the third spring 24 is less than the thrust generated by the second spring 15. Therefore, the third spring 24 cannot use its own tension to drive the chain 17 downward, and will not affect the movement of the traction wheel 11.

[0048] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. So far, the various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here. The scope of the present disclosure is defined by the appended claims.

Claims

1. An automatic lowering traction device for an array displacement meter, comprising an inclinometer tube (27) pre-buried underground, an array displacement meter (25) and a traction device, wherein a plurality of slots (28) are evenly formed on the inner wall of the inclinometer tube (27), and characterized in that: The traction device comprises a traction cylinder (1), a positioning guide wheel (6), a traction wheel (11) and a driving device. A first mounting hole (3) is provided on the top of the traction cylinder (1), a plurality of first mounting grooves (7) are provided on the outer wall of the traction cylinder (1), the positioning guide wheel (6) is arranged in the first mounting groove (7) through the first mounting device, a plurality of second mounting grooves (12) are provided on the outer wall of the traction cylinder (1), the traction wheel (11) is arranged in the second mounting groove (12) through the second mounting device, a driving cavity (22) is provided between the two second mounting grooves (12) in the traction cylinder (1), the driving device is arranged in the driving cavity (22) to drive the traction wheel (11) to rotate, and the array displacement meter (25) is fixed to the top of the traction cylinder (1) by bolts.

2. The automatic lowering and traction device for an array displacement meter (25) according to claim 1, characterized in that: The clamping groove (28) vertically penetrates the inner wall of the inclinometer tube (27).

3. The automatic lowering and traction device for an array displacement meter (25) according to claim 1 is characterized in that: The bottom of the traction cylinder (1) is detachably provided with a lifting ring (2), and the top of the traction cylinder (1) is provided with a spare lifting ring (4) (2) and a spare through hole (5).

4. The automatic lowering and traction device for an array displacement meter (25) according to claim 1, characterized in that: The first mounting grooves (7) are divided into two groups, the two groups of first mounting grooves (7) are arranged on the traction cylinder (1) from top to bottom, each group of first mounting grooves (7) includes two symmetrically arranged first mounting grooves (7), the second mounting grooves (12) are divided into two groups, the two groups of second mounting grooves (12) are arranged on the traction cylinder (1) from top to bottom, each group of second mounting grooves (12) includes two symmetrically arranged second mounting grooves (12), and the angle between the first mounting groove (7) and the adjacent second mounting groove (12) is 90°.

5. The automatic lowering and traction device for an array displacement meter (25) according to claim 1 is characterized in that: The first mounting device comprises a first rotating shaft (8), a first mounting block (9) and a plurality of first springs (10). Slide grooves are provided on both sides of the first mounting groove (7). The first rotating shaft (8) is fixedly connected to the positioning guide wheel (6). The first mounting block (9) can be slidably arranged in the slide groove. One end of the first spring (10) is fixedly connected to the side of the first mounting block (9) away from the outer wall of the traction cylinder (1). The other end of the first spring (10) is fixedly connected to the side wall of the slide groove away from the outer wall of the traction cylinder (1). The two ends of the first rotating shaft (8) are rotatably connected to the first mounting block (9) through bearings.

6. The automatic lowering and traction device for an array displacement meter (25) according to claim 1, characterized in that: The second mounting device comprises a second rotating shaft (13), a second mounting block (14) and a plurality of second springs (15). Slide grooves are provided on both sides of the second mounting groove (12). The second rotating shaft is fixedly connected to the traction wheel (11). The second mounting block (14) is slidably arranged in the slide groove. One end of the second spring (15) is fixedly connected to a side of the second mounting block (14) away from the outer wall of the traction cylinder (1). The other end of the second spring (15) is fixedly connected to the side wall of the slide groove away from the outer wall of the traction cylinder (1). Both ends of the second rotating shaft (13) are rotatably connected to the second mounting block (14) through bearings.

7. The automatic lowering and traction device for an array displacement meter (25) according to claim 1, characterized in that: The driving device comprises two first sprockets (16), a chain (17), a driving shaft (18), two second sprockets (19), a motor (20) and a driven shaft (21). The two first sprockets (16) are sleeved on the same side of the second rotating shafts (13) of the two symmetrically arranged traction wheels (11). The motor (20) is fixedly arranged in a driving cavity (22). One end of the driving shaft (18) is fixedly connected to the output end of the motor (20). The other end of the driving shaft (18) is rotatably connected to the side wall of the driving cavity (22). Both ends of the driven shaft (21) are connected to the side wall of the driving cavity (22) through a third mounting device. The two second sprockets (19) are sleeved on the driving shaft (18) and the driven shaft (21). The chain (17) is sleeved on the outside of the two first sprockets (16) and the two second sprockets (19). The chain (17) is simultaneously engaged with the two first sprockets (16) and the two second sprockets (19).

8. The automatic lowering and traction device for an array displacement meter (25) according to claim 7, characterized in that: The third mounting device includes a vertical groove (23), a third spring (24) and a slider. The vertical groove (23) is arranged on the side walls of the driving cavity (22) at both ends of the driven shaft (21). The slider is slidably arranged in the vertical groove (23). Both ends of the driven shaft (21) are rotatably connected to the slider through bearings. One end of the third spring (24) is fixedly connected to the bottom of the slider, and the other end of the third spring (24) is fixedly connected to the bottom of the vertical groove (23).

9. The automatic lowering and traction device for an array displacement meter (25) according to claim 1, characterized in that: A second mounting hole (26) is provided on the top of the array displacement meter (25).

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