Foundation pit deformation laser detection device

Abstract

The invention discloses a foundation pit deformation laser detection device in the technical field of foundation pit deformation detection, and the device comprises a base, the upper end of the base is provided with a plurality of horizontal detection mechanisms, the upper end of the base is fixedly connected with a supporting pipe, the supporting pipe is internally and movably connected with a supporting rod, and the upper end of the supporting rod is movably connected with a first connecting seat. The inner side of the first connecting seat is movably connected with a second connecting seat, and the inner side of the second connecting seat is movably connected with a third connecting seat; when the folding protective cloth is unfolded, the laser displacement detector can be protected, when the folding protective cloth is folded, the laser displacement detector can detect the deformation displacement amount of the foundation pit, and meanwhile, through the arrangement of the cleaning mechanism, the folding protective cloth can be unfolded to clean a detection opening of the laser displacement detector; and when the folding protective cloth is folded, waste liquid collection and humidification treatment can be conducted on the cleaning mechanism through the humidification and liquid absorption mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of foundation pit deformation, and particularly relates to a foundation pit deformation laser detection device. BACKGROUND

[0002] As a patent with the announcement number CN212482399U discloses a device for measuring foundation pit deformation displacement, which comprises a base, a support pipe is welded on the base, a support rod is slidably connected in the support pipe, a box body is connected on the upper end of the support rod through bolts and nuts, a laser ranging sensor and a wireless signal transmission module are connected on the box body, an alarm module and a support module are connected in the box body through bolts and nuts, a support frame is connected in the box body through bolts and nuts, and a sliding rod is slidably connected on the support frame.

[0003] The above patent realizes the detection of foundation pit deformation through the laser detection sensor and the sliding rod, but the above scheme has the following disadvantages: when construction is carried out near the foundation pit and a large amount of dust generated adheres to the measuring port of the laser measuring instrument, the dust will affect the measurement accuracy of the laser measuring instrument, and when stones or other sundries in the external environment splash into the measuring port of the laser measuring instrument due to external environment and other reasons, the measuring port will also be damaged, therefore, we propose a foundation pit deformation laser detection device. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a foundation pit deformation laser detection device to solve the problems in the background art.

[0005] The purpose of the present application is achieved by a foundation pit deformation laser detection device, which comprises a base, a plurality of horizontal detection mechanisms are arranged on the upper end of the base, a support pipe is fixedly connected to the upper end of the base, a support rod is movably connected in the support pipe, a first connecting seat is movably connected to the upper end of the support rod, a second connecting seat is movably connected to the inner side of the first connecting seat, a third connecting seat is movably connected to the inner side of the second connecting seat, a placing rack is fixedly connected to the upper end of the third connecting seat, a plurality of laser displacement detectors are fixedly installed in the placing rack, a plurality of guide rods are fixedly connected to the upper end of the third connecting seat, a first connecting ring is arranged on the upper side of the third connecting seat, and the plurality of guide rods are movably connected in the first connecting ring. The upper ends of several guide rods are fixedly connected to a second connecting ring. A folded protective cloth is fixedly connected between the first connecting ring and the second connecting ring. The second connecting ring is connected to a material changing mechanism. Several cleaning mechanisms are installed at the lower end of the material changing mechanism. A U-shaped positioning block is fixedly connected to the inner side of the first connecting ring. An installation mechanism is provided on the inner side of the U-shaped positioning block. The cleaning mechanisms are installed through the installation mechanism. Two traction mechanisms are provided at the upper end of the second connecting ring. The traction end of the traction mechanism is connected to the first connecting ring. The first connecting ring is moved up and down through the two traction mechanisms. The upper end of the placement rack is equipped with a humidification and liquid absorption mechanism, which squeezes and absorbs liquid from the cleaning mechanism and then humidifies the cleaning mechanism after liquid absorption.

[0006] Preferably, two first through slots are formed on the outer side of the support tube, and a limiting screw is screwed into the support rod. The two ends of the limiting screw extend into the external environment through the first through slots. A first motor is fixedly connected to the upper end of the support rod, and the output end of the first motor is fixedly connected to a first connecting seat. A second motor is fixedly connected to the outer side of the first connecting seat, and the output end of the second motor is fixedly connected to a second connecting seat. A third motor is fixedly connected to the outer side of the second connecting seat, and the output end of the third motor is fixedly connected to a third connecting seat.

[0007] Preferably, the material changing mechanism includes a third connecting ring, which is movably installed inside the second connecting ring via a screw. A connecting plate is movably connected to the inner side of the third connecting ring. Several first electromagnetic plates and positioning blocks are fixedly installed at the lower end of the connecting plate. A mounting plate is fixedly connected to the upper end of the third connecting ring. A connecting motor is fixedly connected to the upper end of the mounting plate. The output end of the connecting motor is fixedly connected to the connecting plate.

[0008] Preferably, the cleaning mechanism includes a T-shaped block, with a positioning magnetic sheet fixedly connected to the upper end of the T-shaped block, and two cleaning cotton blocks fixedly connected to one side of the T-shaped block, wherein the T-shaped block has a connecting groove at the position of the cleaning cotton block on the lower side.

[0009] Preferably, the installation mechanism includes a second electromagnetic plate, which is fixedly connected to the output end of the first telescopic cylinder, and the first telescopic cylinder is fixedly connected inside the U-shaped positioning block.

[0010] Preferably, the traction mechanism includes a drive motor, which is fixedly connected to the upper end of the second connecting ring. A take-up reel is fixedly connected to the output end of the drive motor, and a traction rope is wound inside the take-up reel. The lower end of the traction rope passes through the second connecting ring and is fixedly connected to the upper end of the first connecting ring.

[0011] Preferably, the humidifying and liquid-absorbing mechanism includes a vertical plate, which is fixedly installed on the upper end of the placement frame. A connecting box is provided on one side of the vertical plate, and one side of the connecting box is open. Two limiting rods are fixedly connected to the side of the connecting box near the vertical plate. The limiting rods are movably connected inside the vertical plate. A second telescopic cylinder is fixedly connected to one side of the vertical plate, and the output end of the second telescopic cylinder is fixedly connected to the connecting box.

[0012] Preferably, two liquid storage tanks are fixedly connected to the upper end of the placement rack, and a circulation pump is fixedly installed on the upper end of the liquid storage tank. One end of the circulation pump is connected to the liquid storage tank, and the other end is connected to a telescopic hose. The end of the telescopic hose away from the circulation pump is fixedly connected to a solenoid valve. The solenoid valve is fixedly connected to the outside of the connecting box and is connected to the inside of the connecting box.

[0013] Preferably, the horizontal detection mechanism includes a mounting box with a transparent upper end. The mounting box is movably connected to a second through slot, which is located at the upper end of the base. The mounting box contains a ball bearing, and laser detectors are provided on both sides of the ball bearing. The laser detectors are fixedly connected to the inside of the mounting box. One side of the mounting box is fixedly connected to one end of a rotating rod, which is movably connected to the base. Two fastening screws are provided on one side of the mounting box and are screwed into the base.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the traction mechanism drives the first connecting ring to move up and down, so that the folded protective cloth can be unfolded and folded accordingly. When the folded protective cloth is unfolded, it can protect the laser displacement detector. When the folded protective cloth is folded, the laser displacement detector can detect the deformation displacement of the foundation pit. At the same time, through the setting of the cleaning mechanism, the folded protective cloth can clean the detection port of the laser displacement detector when unfolded. When the folded protective cloth is folded, the humidification and liquid absorption mechanism can collect and humidify the waste liquid of the cleaning mechanism, preventing dust from adhering to the measurement port of the laser measuring instrument and affecting the measurement accuracy of the laser measuring instrument. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the unfolded folded protective fabric of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the folded protective fabric of the present invention in cross-sectional view.

[0019] Figure 4 This is a three-dimensional structural diagram showing the positional relationship between the second connection and the connecting plate of the present invention.

[0020] Figure 5 For the present invention Figure 3 A schematic diagram of the three-dimensional structure at point A in the middle.

[0021] Figure 6 This is a three-dimensional structural diagram showing the connection between the liquid storage tank and the placement rack of the present invention.

[0022] Figure 7 This is a three-dimensional cross-sectional view of the connecting box location of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram illustrating the connection relationship between the connecting plate and the T-block of the present invention.

[0024] Figure 9 This is a three-dimensional structural diagram illustrating the connection between the mounting box and the ball bearings in this invention.

[0025] Figure 10 This is a schematic diagram of the three-dimensional structure of the support rod of the present invention.

[0026] Figure 11 This is a three-dimensional structural diagram illustrating the positional relationship between the cleaning cotton block and the T-shaped block of the present invention.

[0027] Figure 12 This is a three-dimensional structural diagram illustrating the positional relationship between the positioning magnetic sheet and the T-shaped block in this invention.

[0028] In the diagram: 1. Base; 2. Support tube; 3. First through slot; 4. Limiting screw; 5. Second through slot; 6. Rotary rod; 7. Fastening screw; 8. Connecting slot; 9. First connecting seat; 10. Third connecting seat; 11. First connecting ring; 12. Guide rod; 13. Folded protective cloth; 14. Second connecting ring; 15. Mounting box; 16. Ball bearing; 17. Laser detector; 18. Support rod; 19. U-shaped positioning block; 20. Second motor; 21. Second connecting seat; 22. Third motor; 23. Laser displacement detector; 24. Transmission motor; 25. Connecting plate; 26. Take-up reel; 27. T-block; 28. Positioning magnetic plate; 29. ​​Mounting plate; 30. Cleaning cotton block; 31. First motor; 32. First electromagnetic plate; 33. Positioning block; 34. Third connecting ring; 35. Traction rope; 36. Connecting motor; 37. Liquid storage tank; 38. Placement rack; 39. Circulation pump; 40. Telescopic hose; 41. Limiting rod; 42. Vertical plate; 43. Connecting box; 44. Solenoid valve; 45. First telescopic cylinder; 46. Second electromagnetic plate; 47. Second telescopic cylinder. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1-12 As shown, the present invention provides a technical solution: Example 1: A laser detection device for foundation pit deformation includes a base 1, with several horizontal detection mechanisms on the upper end of the base 1. A support pipe 2 is fixedly connected to the upper end of the base 1, and a support rod 18 is movably connected inside the support pipe 2. A first connecting seat 9 is movably connected to the upper end of the support rod 18, a second connecting seat 21 is movably connected to the inner side of the first connecting seat 9, and a third connecting seat 10 is movably connected to the inner side of the second connecting seat 21. A placement frame 38 is fixedly connected to the upper end of the third connecting seat 10, and several laser displacement detectors 23 are fixedly installed inside the placement frame 38. The laser displacement detectors 23 enable multiple detections of deformation displacement within the foundation pit. Furthermore, the multiple laser displacement detectors 23 arranged from top to bottom allow for the detection of deformation displacement over a large area of ​​the foundation pit. Several guide rods 12 are fixedly connected to the upper end of the third connecting seat 10, and a first connecting ring 11 is provided on the upper side of the third connecting seat 10. The multiple guide rods 12 are movably connected inside the first connecting ring 11. Several guide rods 12 are fixedly connected to the upper ends of the second connecting ring 14. The second connecting ring 14 is equipped with a control processor. The control processor can select the appropriate size and model during use and control the start, stop, counting and timing functions of related components. A folded protective cloth 13 is fixedly connected between the first connecting ring 11 and the second connecting ring 14. The folded protective cloth 13 is unfolded by moving the first connecting ring 11 downwards. The unfolded folded protective cloth 13 protects the laser displacement detector 23. The second connecting ring 14 is connected to the material changing mechanism. Several cleaning mechanisms are installed at the lower end of the material changing mechanism. A U-shaped positioning block 19 is fixedly connected to the inner side of the first connecting ring 11. The U-shaped positioning block 19 has an installation mechanism on its inner side, which is used to install the cleaning mechanism. The upper end of the second connecting ring 14 has two traction mechanisms, the traction end of which is connected to the first connecting ring 11. The two traction mechanisms drive the first connecting ring 11 to move up and down. The upper end of the placement rack 38 has a humidification and liquid absorption mechanism, which squeezes and absorbs liquid from the cleaning mechanism and humidifies the cleaning mechanism after liquid absorption.

[0031] Example 2: Based on Example 1, in order to automatically replace the cleaning cotton pad 30 after multiple uses, two first through slots 3 are opened on the outside of the support tube 2. A limiting screw 4 is screwed into the support rod 18. The two ends of the limiting screw 4 extend into the external environment through the first through slots 3. Loosening the limiting screw 4 allows the support rod 18 to move along the support tube 2. When the first connecting seat 9 moves to a suitable height, the limiting screw 4 is tightened to prevent the support rod 18 from moving. A first motor 31 is fixedly connected to the upper end of the support rod 18. The output end of the first motor 31 is fixedly connected to the first connecting seat 9. The outside of the first connecting seat 9 is fixed. A second motor 20 is connected, and the output end of the second motor 20 is fixedly connected to the second connecting seat 21. A third motor 22 is fixedly connected to the outside of the second connecting seat 21, and the output end of the third motor 22 is fixedly connected to the third connecting seat 10. The second connecting seat 21 can be moved by the second motor 20 and the third connecting seat 10 can be moved by the third motor 22 to make several laser displacement detectors 23 horizontal or at a certain angle. At the same time, the first connecting seat 9 can be rotated by the first motor 31, so that the laser displacement detectors 23 can detect the deformation displacement of multiple foundation pit points. The material changing mechanism includes a third connecting ring 34, which is movably mounted inside the second connecting ring 14 via a screw. A connecting plate 25 is movably connected to the inner side of the third connecting ring 34. Several first electromagnetic plates 32 and a positioning block 33 are fixedly mounted on the lower end of the connecting plate 25. A mounting plate 29 is fixedly connected to the upper end of the third connecting ring 34, and a connecting motor 36 is fixedly connected to the upper end of the mounting plate 29. The output end of the connecting motor 36 is fixedly connected to the connecting plate 25. When the control processor detects that the first connecting ring 11 has moved up and down a certain number of times, the connecting motor 36 will start and drive the connecting plate 25 to rotate. At the same time, the second electromagnetic plate 46 located inside the U-shaped positioning block 19 will close, and the corresponding first electromagnetic plate 32 will start to position the upper end of the T-shaped block 27. The magnetic plate 28 attracts the T-shaped block 27 inside the U-shaped positioning block 19 when the connecting plate 25 rotates. When the new T-shaped block 27 enters the U-shaped positioning block 19, the second electromagnetic plate 46 will restart, and the corresponding first electromagnetic plate 32 will close, completing the replacement of the cleaning cotton block 30. The cleaning mechanism includes a T-shaped block 27. The contact position between the T-shaped block 27 and the second electromagnetic plate 46 should be a metal setting that can attract. The upper end of the T-shaped block 27 is fixedly connected to the magnetic plate 28. Two cleaning cotton blocks 30 are fixedly connected to one side of the T-shaped block 27. The T-shaped block 27 has a connecting groove 8 at the position of the lower cleaning cotton block 30. The upper cleaning cotton block 30 is a dry cotton block, and the lower cleaning cotton block 30 is a wet cotton block. The mounting mechanism includes a second electromagnetic plate 46, which is fixedly connected to the output end of the first telescopic cylinder 45. The first telescopic cylinder 45 is fixedly connected inside the U-shaped positioning block 19. After the T-shaped block 27 comes into contact with the second electromagnetic plate 46, a certain distance will be generated between one side of it and the U-shaped positioning block 19, so that the first telescopic cylinder 45 can drive the T-shaped block 27 to move a certain distance after starting. The traction mechanism includes a drive motor 24, which is fixedly connected to the upper end of the second connecting ring 14. The output end of the drive motor 24 is fixedly connected to a take-up reel 26, and a traction rope 35 is wound inside the take-up reel 26. The lower end of the traction rope 35 passes through the second connecting ring 14 and is fixedly connected to the upper end of the first connecting ring 11. The wet liquid absorption mechanism includes a vertical plate 42, which is fixedly installed on the upper end of the placement frame 38. A connecting box 43 is provided on one side of the vertical plate 42. One side of the connecting box 43 is open. Two limiting rods 41 are fixedly connected to the side of the connecting box 43 near the vertical plate 42. The limiting rods 41 are movably connected inside the vertical plate 42. A second telescopic cylinder 47 is fixedly connected to one side of the vertical plate 42. The output end of the second telescopic cylinder 47 is fixedly connected to the connecting box 43.

[0032] Two liquid storage tanks 37 are fixedly connected to the upper end of the placement rack 38. In use, one tank 37 can be used to store clean water, while the other tank 37 is used to store dirty water. A circulation pump 39 is fixedly installed on the upper end of each tank 37. One end of the circulation pump 39 is connected to the tank 37, and the other end is connected to a telescopic hose 40. The end of the telescopic hose 40 away from the circulation pump 39 is fixedly connected to a solenoid valve 44. The solenoid valve 44 is fixedly connected to the outside of the connecting box 43 and communicates with the inside of the connecting box 43. The leveling mechanism includes a mounting box 15, the upper part of which is transparent. The mounting box 15 is movably connected to a second through groove 5, which is located on the upper part of a base 1. A ball bearing 16 is installed inside the mounting box 15, and laser detectors 17 are mounted on both sides of the ball bearing 16. The laser detectors 17 are fixedly connected to the inside of the mounting box 15. One side of the mounting box 15 is fixedly connected to one end of a rotating rod 6, which is movably connected to the base 1. Two fastening screws 7 are located on one side of the mounting box 15 and are screwed into the base 1. When the installation position is uneven, the mounting box 15 can be moved by turning the fastening screws 7. The mounting box 15 can be leveled by rotating the rotating rod 6. After adjustment, the fastening screws 7 are tightened again to contact the mounting box 15, thus fixing the mounting box 15 in its fixed position. Simultaneously, when the ball bearing 16 located in the mounting box 15 is adjusted to the middle position of the mounting box 15, if the device after installation has a large deviation due to external environmental factors, the laser detectors 17 in several mounting boxes 15 can detect the deviation distance of the ball bearing 16. The control processor controls the second motor 20 or the third motor 22 to start according to the deviation distance detected by the laser detector 17, and drives the second connecting seat 21 or the third connecting seat 10 to move and rotate a certain distance to prevent a large deviation between the pit position detected by the laser displacement detector 23 in the first detection and the pit position detected in the second detection. The motors used in this device, such as the second motor 20, the third motor 22, and the first motor 31, can all be servo motors of appropriate size and model.

[0033] Working principle: When in use, the base 1 is installed on the ground with bolts. During the installation process, the level of the base 1 is observed through the ball bearings 16 located in several mounting boxes 15. After the base 1 is installed, the height of the first connecting seat 9 can be adjusted according to the required pit location. Specifically, after loosening the limit screw 4, the support rod 18 can move along the support tube 2. When the first connecting seat 9 moves to the appropriate height, the limit screw 4 is tightened so that the support rod 18 cannot move. The positioning magnetic pieces 28 on the upper end of several T-blocks 27 are connected to the corresponding first electromagnetic plates 32. During the connection process, the side of the T-block 27 with the cleaning cotton block 30 is attached to the positioning block 33. The third connecting ring 34 is installed to the inside of the second connecting ring 14 by a screw. The connecting motor 36 is turned on to drive the connecting plate 25 connected to its output end to rotate. The rotating connecting plate 25 rotates one side of the T-shaped block 27 into the U-shaped positioning block 19. The connecting motor 36 stops rotating. At this time, the second electromagnetic plate 46 starts to attract the T-shaped block 27 to the position where it contacts, so that one T-shaped block 27 is installed in the U-shaped positioning block 19. At the same time, the first electromagnetic plate 32 located on the upper side of the U-shaped positioning block 19 will release the attraction of the T-shaped block 27. The required foundation pit locations can be moved by the second motor 20 driving the second connecting seat 21, and the third motor 22 driving the third connecting seat 10 to move, so that several laser displacement detectors 23 are in a horizontal state or at a certain angle. At the same time, the first motor 31 drives the first connecting seat 9 to rotate, so that the laser displacement detectors 23 can detect the deformation displacement of multiple foundation pit locations. The drive motor 24 drives the take-up reel 26 to rotate, causing the take-up reel 26 to stop winding the traction rope 35. At this time, under the gravity of the first connecting ring 11, the first connecting ring 11 will drive the folded protective cloth 13 to unfold. The unfolded folded protective cloth 13 protects several laser displacement detectors 23. When the set time is reached, when the laser displacement detectors 23 need to detect the deformation displacement of the pit points, the drive motor 24 will drive the take-up reel 26 to wind the traction rope 35. Through the synchronous winding of the two take-up reels 26, the first connecting ring 11 moves upward and the folded protective cloth 13 is folded back into the folded state. At this time, several laser displacement detectors 23 can measure and detect the deformation displacement of the pit points. Simultaneously, after the first connecting ring 11 moves upward, the second telescopic cylinder 47 will start and drive the connecting box 43 to move. When one side of the connecting box 43 enters the connecting groove 8, the cleaning cotton block 30 on the lower side will be squeezed as the connecting box 43 continues to move, causing the water inside the cleaning cotton block 30 to be squeezed out. Since one side of the connecting box 43 is engaged in the connecting groove 8, the connecting box 43 is in a sealed state. The solenoid valve 44 located on one side of the connecting box 43 will start, so that the circulation pump 39 on one side can draw the water from the connecting box 43 into the telescopic hose 40. The water is then drawn out by the telescopic hose 40. The water is drawn into the storage tank 37 on one side for storage. After the extraction is completed, the solenoid valve 44 and the circulation pump 39 will be closed. At the same time, the circulation pump 39 and the solenoid valve 44 on the other side will be activated, so that the water in the storage tank 37 on the other side will be drawn into the connecting box 43. After a certain amount of water is extracted, the solenoid valve 44 and the circulation pump 39 on that side will be closed at the same time. The second telescopic cylinder 47 will drive the connecting box 43 to move slowly outward. At this time, the water in the connecting box 43 will be absorbed by the cleaning cotton block 30 on the lower side. When the connecting box 43 returns to the initial position, the second telescopic cylinder 47 will be closed. After the laser displacement detector 23 completes its detection, the drive motor 24 will start again, causing the first connecting ring 11 to move downwards. As the first connecting ring 11 moves, it will drive the T-block 27 to move as well. At this time, the damp cleaning cotton swab 30 on the lower side will first wipe the laser detection position of the laser displacement detector 23, and then the dry cleaning cotton swab 30 on the upper side will wipe the laser detection position of the laser displacement detector 23 again, thus cleaning the laser detection position of the laser displacement detector 23. When the first connecting ring 11 moves upwards again, the first telescopic cylinder 45 will drive the second electromagnetic plate 46 to move. The second electromagnetic plate 46 will drive the T-block 27 to move, preventing the cleaning cotton swab 30 from contacting the laser detection position of the laser displacement detector 23 again when the first connecting ring 11 moves upwards.

[0034] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A laser detection device for foundation pit deformation, comprising a base, characterized in that: The upper end of the base is provided with several horizontal detection mechanisms. A support tube is fixedly connected to the upper end of the base. A support rod is movably connected inside the support tube. A first connecting seat is movably connected to the upper end of the support rod. A second connecting seat is movably connected to the inner side of the first connecting seat. A third connecting seat is movably connected to the inner side of the second connecting seat. A placement frame is fixedly connected to the upper end of the third connecting seat. Several laser displacement detectors are fixedly installed inside the placement frame. Several guide rods are fixedly connected to the upper end of the third connecting seat. A first connecting ring is provided on the upper side of the third connecting seat. Several guide rods are movably connected inside the first connecting ring. The upper ends of several guide rods are fixedly connected to a second connecting ring. A folded protective cloth is fixedly connected between the first connecting ring and the second connecting ring. The second connecting ring is connected to a material changing mechanism. Several cleaning mechanisms are installed at the lower end of the material changing mechanism. A U-shaped positioning block is fixedly connected to the inner side of the first connecting ring. An installation mechanism is provided on the inner side of the U-shaped positioning block. The cleaning mechanisms are installed through the installation mechanism. Two traction mechanisms are provided at the upper end of the second connecting ring. The traction end of the traction mechanism is connected to the first connecting ring. The first connecting ring is moved up and down through the two traction mechanisms. The upper end of the placement rack is equipped with a humidification and liquid absorption mechanism, which squeezes and absorbs liquid from the cleaning mechanism and then humidifies the cleaning mechanism after liquid absorption.

2. The laser detection device for foundation pit deformation according to claim 1, characterized in that: Two first through slots are opened on the outside of the support tube. A limiting screw is screwed into the support rod. Both ends of the limiting screw extend into the external environment through the first through slots. A first motor is fixedly connected to the upper end of the support rod. The output end of the first motor is fixedly connected to the first connecting seat. A second motor is fixedly connected to the outside of the first connecting seat. The output end of the second motor is fixedly connected to the second connecting seat. A third motor is fixedly connected to the outside of the second connecting seat. The output end of the third motor is fixedly connected to the third connecting seat.

3. The laser detection device for foundation pit deformation according to claim 1, characterized in that: The material changing mechanism includes a third connecting ring, which is movably installed inside the second connecting ring via a screw. A connecting plate is movably connected to the inner side of the third connecting ring. Several first electromagnetic plates and positioning blocks are fixedly installed at the lower end of the connecting plate. An mounting plate is fixedly connected to the upper end of the third connecting ring. A connecting motor is fixedly connected to the upper end of the mounting plate. The output end of the connecting motor is fixedly connected to the connecting plate.

4. The laser detection device for foundation pit deformation according to claim 3, characterized in that: The cleaning mechanism includes a T-shaped block, with a positioning magnetic sheet fixedly connected to the upper end of the T-shaped block, and two cleaning cotton pads fixedly connected to one side of the T-shaped block. The T-shaped block has a connecting groove at the position of the cleaning cotton pad on the lower side.

5. The laser detection device for foundation pit deformation according to claim 1, characterized in that: The installation mechanism includes a second electromagnetic plate, which is fixedly connected to the output end of the first telescopic cylinder, and the first telescopic cylinder is fixedly connected inside the U-shaped positioning block.

6. The laser detection device for foundation pit deformation according to claim 1, characterized in that: The traction mechanism includes a drive motor, which is fixedly connected to the upper end of the second connecting ring. A take-up reel is fixedly connected to the output end of the drive motor. A traction rope is wound inside the take-up reel. The lower end of the traction rope passes through the second connecting ring and is fixedly connected to the upper end of the first connecting ring.

7. The laser detection device for foundation pit deformation according to claim 1, characterized in that: The humidification and liquid absorption mechanism includes a vertical plate, which is fixedly installed on the upper end of the placement frame. A connecting box is provided on one side of the vertical plate, and one side of the connecting box is open. Two limiting rods are fixedly connected to the side of the connecting box near the vertical plate. The limiting rods are movably connected inside the vertical plate. A second telescopic cylinder is fixedly connected to one side of the vertical plate, and the output end of the second telescopic cylinder is fixedly connected to the connecting box.

8. The laser detection device for foundation pit deformation according to claim 7, characterized in that: Two liquid storage tanks are fixedly connected to the upper end of the placement rack. A circulation pump is fixedly installed on the upper end of the liquid storage tank. One end of the circulation pump is connected to the liquid storage tank, and the other end is connected to a telescopic hose. The end of the telescopic hose away from the circulation pump is fixedly connected to a solenoid valve. The solenoid valve is fixedly connected to the outside of the connecting box and is connected to the inside of the connecting box.

9. The laser detection device for foundation pit deformation according to claim 1, characterized in that: The horizontal detection mechanism includes a mounting box with a transparent upper end. The mounting box is movably connected to a second through slot, which is located at the upper end of the base. The mounting box contains ball bearings, and laser detectors are located on both sides of the ball bearings. The laser detectors are fixedly connected to the inside of the mounting box. One side of the mounting box is fixedly connected to one end of a rotating rod, which is movably connected to the base. Two fastening screws are located on one side of the mounting box and are screwed into the base.

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