A roadbed settlement detection device convenient to operate and high in protection

Abstract

The application discloses a kind of roadbed settlement detection devices of easy operation and high protection, it includes protection box, movable guide rail, lifting mechanism and dustproof mechanism, the cavity of accommodating detector is equipped in the protection box, lifting hole is equipped in the lower bottom surface of protection box, the horizontal installation rod of detector is equipped in the protection box, the horizontal installation rod can be telescopic up and down along lifting hole;Movable guide rail is located at the left and right ends of protection box, the protection box can repeatedly move along the lengthways direction of movable guide rail;Lifting mechanism is located in protection box, and the detector is received or extended on lifting hole by cooperating with horizontal installation rod control;Dustproof mechanism is located at lifting hole, and the opening and closing of lifting hole is controlled to prevent dust;The application can facilitate detection operation, and at the same time, detector can be protected.

Description

Technical Field

[0001] This invention relates to a roadbed settlement detection device that is easy to operate and highly protective, belonging to the field of roadbed settlement detection tools. Background Technology

[0002] Roadbed settlement is the phenomenon of road foundation sinking due to external forces or its own gravity. It is caused by factors such as insufficient roadbed compaction, weak roadbed foundation, low compaction material quality, geological changes, and abundant groundwater. Roadbed settlement can have a certain impact on road safety or subsequent construction, so it is often necessary to monitor the roadbed settlement.

[0003] Existing roadbed settlement detection devices typically select a specific road section for fixed-point testing. During the roadbed settlement detection process, the detection devices are usually quite complex to operate, and the complicated operation affects the detection effect and efficiency. At the same time, existing devices lack protective devices for the detectors, and during transportation or non-working hours, collisions, dust, or contamination often occur, which can affect the precision detectors and seriously affect the measurement results.

[0004] In other words, there is a need for a roadbed settlement detection device that is easy to operate and can protect the detector. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a roadbed settlement detection device that is easy to operate and highly protected, which can facilitate detection operations and protect the detector, thus overcoming the shortcomings of the prior art.

[0006] The objective of this invention is achieved through the following technical solution: The invention discloses a roadbed settlement detection device that is easy to operate and highly protective. It includes: a protective box with a cavity for accommodating a detector; a lifting hole on the bottom surface of the protective box; a horizontal mounting rod for the detector inside the protective box, which can extend and retract along the lifting hole; a movable guide rail located at the left and right ends of the protective box, allowing the protective box to move repeatedly along the longitudinal direction of the guide rail; a lifting mechanism located inside the protective box, which, in conjunction with the horizontal mounting rod, controls the detector to retract or extend above or below the lifting hole; and a dustproof mechanism located at the lifting hole, which controls the opening and closing of the lifting hole to prevent dust accumulation.

[0007] As described above, a vertical connecting plate is provided on the horizontal mounting rod, and slide rails are provided on both sides of the bottom of the protective box. The slide rails are located on the left and right sides of the lifting hole. Hinged seats that can slide along the slide rails are symmetrically provided on the left and right sides. A lifting plate is hinged to the hinged seat, and a lifting block is provided between the free ends of the left and right lifting plates. The lifting mechanism includes: A balance adjustment component is located at the upper end of the connecting plate to adjust the lifting and lowering process of the connecting plate to keep it vertical; A lifting assembly is located inside the protective box and is in close contact with the hinge seat. The lifting assembly controls the hinge seat to move towards or away from the center of the protective box to lift or lower the lifting block.

[0008] The aforementioned balance adjustment assembly includes a fixed column horizontally fixed to the connecting plate, with downward-opening sliding grooves at both ends of the fixed column, and fixed rods fixed at both ends of the protective box, with the free ends of the fixed rods sliding within the sliding grooves; a counterweight is provided on the fixed column.

[0009] The aforementioned lifting assembly includes sliding rods disposed at the left and right ends of the protective box. Through holes for the sliding rods are provided at the left and right ends of the protective box. The inner end of the sliding rod is located at the bottom of the protective box and can extend and retract into the protective box.

[0010] Both sides of the aforementioned lifting hole end are provided with stops, and a guide rod is provided between the stops. The dustproof mechanism includes: A dustproof plate, which is sleeved on the guide rod, slides on the bottom of the protective box, and is located on both sides of the lifting hole; An automatic opening and closing assembly is located on both sides of the protective box. The automatic opening and closing assembly automatically closes or opens the dustproof plate after the detector rises along the lifting hole or before it falls.

[0011] The aforementioned automatic opening and closing assembly includes: a trigger closing component, which includes a trigger plate fixed to the outer end of a slide rod, a "V"-shaped pressure groove on the side of the trigger plate facing the dustproof plate, and protrusions that cooperate with the pressure groove at both ends of the dustproof plate. The slide rod extends inward and retracts the detector into the protective box. The pressure groove presses the protrusions on the left and right dustproof plates into the pressure groove to close the two dustproof plates. A separation and reset component includes a reset spring on a guide rod between the dustproof plates, and a storage groove for the reset spring on the opposite side of the dustproof plates.

[0012] The aforementioned movable guide rail includes: a telescopic part, which extends or retracts the movable guide rail to lengthen or shorten its length; the telescopic part includes a central tube with casters at the bottom and telescopic tubes sleeved at both ends; a support assembly located at both ends of the movable guide rail for supporting its lifting and lowering, so that the movable guide rail is moved away from or placed on the ground; the support assembly includes vertical through holes at both ends of the telescopic part, vertically movable support rods within the vertical through holes, a fixed plate at the upper end of the support rods, a limiting block for the fixed plate at the upper end of the telescopic part, a notch at the edge of the fixed plate for the limiting block to pass through vertically, and a compression spring between the fixed plate and the upper surface of the telescopic part.

[0013] The central tube is provided with a magnetic plate in the middle, and the connection end between the telescopic tube and the central tube is provided with an iron fixing plate.

[0014] The outer end of the aforementioned support rod is connected to a connecting rod, and a sleeve plate that cooperates with the telescopic part is provided on the connecting rod. A limiting plate is provided on the inner wall of the sleeve plate. Track grooves are provided on both the middle tube and the telescopic tube. Traveling wheels that cooperate with the track grooves are provided on the limiting plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the cooperation of a protective box, a lifting mechanism, and a dustproof mechanism, can store the detector inside the protective box when transporting or when the equipment is idle, thereby protecting the detector from collisions, dust, or contamination. Simultaneously, it facilitates operation during testing. Specifically, when the device is needed to detect settlement on a section of the roadbed, it is transported to the designated location. Then, the sliding rods on both sides are manually pulled outward from the protective box, and the length of the pull-out is adjusted according to the width of the road surface. At this time, the lifting plate is pressed down by the weight of the balance adjustment component, which allows the detector to extend out of the lifting hole. At the same time, the trigger plate moves outward and gradually separates from the protrusion. The two dustproof plates can be pushed outward by the return spring to open the lifting hole, thereby preventing the detector from colliding with the dustproof plate. Then, the end of the telescopic tube is manually lifted, and the fixed plate is pressed down, so that the notch passes through the limiting block and moves to its bottom. Then, the fixed plate is rotated so that the notch moves away from the limiting block. At this time, the bottom of the support rod contacts the ground, and the caster separates from the ground. The device can then be supported on the roadbed by the four support rods, improving the stability of the device. At this time, the construction personnel can manually move the protective box, thereby moving the detector to detect the settlement of the roadbed.

[0016] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the invention will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a structural diagram of the roadbed settlement detection device.

[0018] Figure 2 This is a cross-sectional view of the lifting component of the roadbed settlement detection device.

[0019] Figure 3 This is a cross-sectional view of the balancing components of the roadbed settlement detection device.

[0020] Figure 4 This is a structural diagram of the protective components of a roadbed settlement detection device.

[0021] Figure 5 Another perspective view of the protective components of the roadbed settlement detection device.

[0022] Figure 6 This is a cross-sectional view of the middle section of the roadbed settlement detection device.

[0023] Figure 7 This is a cross-sectional view of the traveling component of the roadbed settlement detection device.

[0024] Figure 8 This is a structural diagram of the expansion joint of a roadbed settlement detection device.

[0025] Figure 9 Another perspective view of the fixing components of the roadbed settlement detection device.

[0026] The components include: 1. Protective box; 2. Detector; 3. Lifting hole; 4. Connecting plate; 5. Slide rail; 6. Hinge seat; 7. Lifting plate; 8. Lifting block; 9. Balance adjustment assembly; 9-1. Fixed column; 9-2. Slide groove; 9-3. Fixed rod; 9-4. Counterweight block; 10. Slide rod; 11. Stop block; 12. Guide rod; 13. Dustproof plate; 14. Trigger plate; 15. Pressure groove; 16. Protrusion; 17. Return spring; 18. Central tube; 19. Universal wheel; 20. Telescopic tube; 21. Support rod; 22. Fixed plate; 23. Limiting block; 24. Notch; 25. Compression spring; 26. Magnetic plate; 27. Fixed plate; 28. Connecting rod; 29. ​​Sleeve plate; 30. Limiting plate; 31. Track groove; 32. Traveling wheel. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0028] Example 1 like Figures 1-5 As shown, the invention discloses a roadbed settlement detection device that is easy to operate and highly protective. It mainly consists of a protective box 1, a movable guide rail, a lifting mechanism, and a dustproof mechanism. Specifically: The protective box 1 has a cavity to accommodate the detector 2. A lifting hole 3 is located on the bottom surface of the protective box 1. A horizontal mounting rod for the detector 2 is located inside the protective box 1, and the horizontal mounting rod can extend and retract along the lifting hole 3. The protective box 1 is rectangular, and its top is fixed with a cover by bolts or other means. Multiple detectors 2 are arranged in a rectangular pattern within the lifting hole 3. The working principle of detecting roadbed settlement is existing technology and will not be elaborated upon here. Furthermore, the movable guide rails are located at the left and right ends of the protective box 1, and the protective box 1 can move repeatedly along the longitudinal direction of the movable guide rails. Furthermore, the lifting mechanism is located inside the protective box 1, and works in conjunction with the horizontal mounting rod to control the detector 2 to retract or extend above or below the lifting hole 3; Furthermore, a dustproof mechanism is located at the lifting hole 3, controlling the opening and closing of the lifting hole 3 to prevent dust. The dustproof mechanism is used to seal the lifting hole 3 to prevent excessive dust and other foreign objects from entering the protective box 1 during transportation and storage, thus avoiding inconvenience to the use of the detector 2.

[0029] A vertical connecting plate 4 is provided on the horizontal mounting rod. Slide rails 5 are provided on both sides of the inner bottom of the protective box 1. The slide rails 5 are located on the left and right sides of the lifting hole 3. Hinged seats 6, which can slide along the slide rails 5, are symmetrically provided on the left and right sides. Lifting plates 7 are hinged to the hinged seats 6. Lifting blocks 8 are provided between the free ends of the left and right lifting plates 7. The lifting mechanism includes: Furthermore, the balance adjustment component 9 is located on the upper end of the connecting plate 4 to adjust the verticality of the connecting plate 4 during its lifting and lowering process; the balance adjustment component 9 is used to balance the detector 2, preventing the detector 2 from shaking excessively when the road surface is uneven or when moving slowly, thus affecting the accuracy of the detection. The balance adjustment assembly 9 includes a fixed column 9-1 horizontally fixed on the connecting plate 4, and downward-opening sliding grooves 9-2 at both ends of the fixed column 9-1. Fixed rods 9-3 are fixed at both ends of the protective box 1, and the free ends of the fixed rods 9-3 slide in the sliding grooves 9-2. A counterweight 9-4 is provided on the fixed column 9-1.

[0030] Specifically, the fixing rod 9-3 is used to support the fixing column 9-1. The ends of the two fixing rods 9-3 on both sides are located in the sliding groove 9-2, allowing the fixing column 9-1 and the detector 2 to rotate during use. Under the pressure of the counterweight 9-4, the detector 2 is kept perpendicular to the ground, preventing the detector 2 from shifting when used on roadbed surfaces with height differences, thus avoiding affecting the accuracy of the detector 2's detection results. The ends of the fixing rods 9-3 and the inner wall of the sliding groove 9-2 are made of high-friction material. The friction between the two can prevent the detector 2 from shaking during use and when construction personnel move the device, thus avoiding affecting the accuracy of the detection results.

[0031] Furthermore, four hinge seats 6 are provided, symmetrically located on both sides of the bottom wall inside the protective box 1. The lifting plate 7 is used to lift the detector 2 and the balance adjustment component 9 upwards, so that the detector 2 is located inside the protective box 1 and protected by the protective box 1. The lifting block 8 is divided into two parts: one part is rectangular and fixed on both sides of the connecting plate 4, and the other part is fixed at the bottom of the rectangular part. Both sides of the lifting plate 7 are rounded. The ends of the lifting plate 7 are also chamfered. So when the lifting plate 7 lifts the balance adjustment component 9 upwards, even if the detector 2 and the balance adjustment component 9 are initially tilted, they will be centered first and then lifted upwards. At the same time, two guide plates are fixed on the top wall inside the protective box 1. The two sides of the counterweight 9-4 are chamfered. When the counterweight 9-4 moves upwards, it can be centered by the two guide plates to prevent the end of the fixing rod 9-3 from not being in the slide groove 9-2 when the detector 2 is downwards due to bumps or other conditions during transportation, which would cause great inconvenience to subsequent operations.

[0032] Furthermore, the lifting assembly is located inside the protective box 1 and is in close contact with the hinge seat 6. The lifting assembly controls the hinge seat 6 to move towards or away from the center of the protective box 1 to achieve the lifting or lowering of the lifting block 8. The lifting assembly is used to lift the detector 2 and the balance adjustment assembly 9, so that the detector 2 is retracted into the protective box 1 to avoid damage to the detector 2 caused by foreign object impact during transportation. The lifting assembly includes slide rods 10 set at the left and right ends of the protective box 1. The slide rods 10 have through holes at the left and right ends of the protective box 1. The inner end of the slide rod 10 is located at the bottom of the protective box 1 and can extend and retract inwards from the protective box 1.

[0033] The sliding rod 10 is rectangular, and four sliding rods 10 are provided on each side of the protective box 1. The four sliding rods 10 on each side are fixed by an I-shaped fixing frame. The end of the sliding rod 10 located inside the protective box 1 is fixed with a protrusion to prevent the sliding rod 10 from detaching from the protective box 1. It has the function of left and right extension and retraction. There are also pads and other materials between the sliding rod 10 and the protective box 1 to improve the friction between the two, so that the placement position of the device can be adjusted according to the width of the roadbed, and large shaking or displacement can be avoided when moving the protective box 1. The fixing frame is made of iron material, and magnets are fixed on both sides of the protective box 1. When stored, the sliding rods 10 on both sides slide inward, so that the fixing frame is attracted and fixed by the magnets, thus preventing the sliding rods 10 from accidentally sliding during transportation and movement.

[0034] The positions of the two sliding rods 10 at the bottom of each side correspond to the hinge seat 6. When the construction personnel push the sliding rods 10 inward to store them, the sliding rods 10 can push the hinge seat 6 inward to move, and drive the lifting plate 7 to lift the detector 2 and the balance adjustment component 9 upward for storage. When the sliding rods 10 move away from the hinge seat 6, the weight of the balance adjustment component 9 will press the lifting plate 7 downward, so that the detector 2 can extend out from the lifting hole 3.

[0035] Both sides of the lifting hole 3 are provided with stop blocks 11, and guide rods 12 are provided between the stop blocks 11. The dustproof mechanism includes a dustproof plate 13, which is sleeved on the guide rod 12, slides on the bottom of the protective box 1, and is located on both sides of the lifting hole 3. Furthermore, the automatic opening and closing components are located on both sides of the protective box 1. The automatic opening and closing components automatically close or open the dustproof plate 13 after the detector 2 rises along the lifting hole 3 or before it falls.

[0036] Specifically, the automatic opening and closing assembly includes a separation and reset component. The trigger closing component includes a trigger plate 14 fixed to the outer end of the slide rod 10. A "V"-shaped pressure groove 15 is provided on the side of the trigger plate 14 facing the dustproof plate 13. Protrusions 16 that cooperate with the pressure groove 15 are provided at both ends of the dustproof plate 13. The slide rod 10 extends inward and retracts the detector 2 into the protective box 1. The pressure groove 15 presses the protrusions 16 on the left and right dustproof plates 13 into the pressure groove 15 to close the left and right dustproof plates 13. The separation and reset component includes a reset spring 17 provided on the guide rod 12 between the dustproof plates 13. A storage groove for the reset spring 17 is provided on the opposite side of the dustproof plate 13.

[0037] Two dustproof plates 13 are symmetrically arranged. When the two are closed, they can block the lifting hole 3, thus preventing dust and other impurities from entering the protective box 1 during storage and transportation, which would have a significant impact on the detector 2. The protrusions 16 are arranged on both sides of the bottom of the dustproof plates 13. The protrusions 16 at the bottom of the two dustproof plates 13 are symmetrically positioned. When the slide rod 10 moves into the protective box 1, the trigger plate 14 moves with it and slowly makes the protrusions 16 slide in the V-shaped pressure groove 15, thereby squeezing the two dustproof plates 13 inward and blocking the lifting hole 3. At this time, the detector 2 has entered the protective box 1, preventing it from colliding with the dustproof plates 13.

[0038] Meanwhile, four stops 11 are provided, with two symmetrically arranged on the outer side of each dustproof plate 13. Together with the guide rod 12, they serve to guide and limit the movement, preventing the dustproof plate 13 from shifting. The reset spring 17 is located on the surface of the guide rod 12, which applies an outward pushing force to the two dustproof plates 13. When the trigger plate 14 moves outward and gradually separates from the protrusion 16, the reset spring 17 can push the two dustproof plates 13 outward, opening the lifting hole 3.

[0039] Example 2 like Figures 6-9 As shown, this embodiment is an improvement on embodiment 1, further defining the structure of the movable guide rail. The movable guide rail includes a telescopic section and a support assembly. The telescopic part extends or retracts the movable guide rail to lengthen or shorten the movable guide rail; the telescopic part includes a central tube 18, with universal wheels 19 at the bottom of the central tube 18, and telescopic tubes 20 sleeved at both ends of the central tube 18; the central tube 18 is rectangular with a hollow center, and the telescopic tubes 20 are symmetrically distributed on both sides of the central tube 18, which can slide and retract inside the central tube 18, thereby improving the detection range of the detector 2 on the roadbed.

[0040] The support assembly is used to fix the device when detecting roadbed settlement, so that the casters 19 are separated from the ground, thereby making the device more stable. The casters 19 make it more convenient to move the device to a designated location and to store and transport it.

[0041] Specifically, the support components are located at both ends of the movable guide rail and are used to support the lifting and lowering of the movable guide rail so that the movable guide rail is away from or placed on the ground. The support components include vertical through holes at both ends of the telescopic part, a vertically movable support rod 21 in the vertical through hole, a fixed plate 22 at the upper end of the support rod 21, a limiting block 23 of the fixed plate 22 at the upper end of the telescopic part, a notch 24 at the edge of the fixed plate 22 for the limiting block 23 to pass through vertically, and a compression spring 25 between the fixed plate 22 and the upper end face of the telescopic part.

[0042] The bottom end of the support rod 21 is tapered, and a notch 24 is provided on one side of the fixing plate 22. The limiting block 23 is L-shaped. When the support rod 21 moves upward and needs to move away from the ground, the notch 24 is exposed from the limiting block 23, and the fixing plate 22 moves above the limiting block 23. A compression spring 25 is fixed between the support rod 21 and the telescopic tube 20, which applies an upward thrust to the support rod 21, so that in the initial state, the bottom end of the support rod 21 is away from the ground. When the device needs to be supported by the support rod 21, the end of the telescopic tube 20 is manually lifted, and then the fixing plate 22 is pressed down, so that the notch 24 passes through the limiting block 23 and moves to its bottom. Then the fixing plate 22 is rotated so that the notch 24 moves away from the limiting block 23. At this time, the bottom end of the support rod 21 contacts the ground, and the universal wheel 19 separates from the ground. The device can then be supported on the roadbed by the four support rods 21, which improves the stability of the device.

[0043] A magnetic plate 26 is provided in the middle of the central tube 18, and an iron fixing plate 27 is provided at the connection end between the telescopic tube 20 and the central tube 18. The telescopic tube 20 slides inside the central tube 18. The end of the telescopic tube 20 is chamfered and extends to the outside of the central tube 18. The magnetic plate 26 is located in the middle of the inner wall of the central tube 18. When both telescopic tubes 20 move into the central tube 18, the magnetic plate 26 will attract the fixing plate 27 to fix the two telescopic tubes 20 and prevent them from accidentally sliding out of the central tube 18 during transportation.

[0044] The outer end of the support rod 21 is connected to a connecting rod 28. A sleeve plate 29, which mates with the telescopic part, is provided on the connecting rod 28. A limiting plate 30 is provided on the inner wall of the sleeve plate 29. Track grooves 31 are provided on both the central tube 18 and the telescopic tube 20. A traveling wheel 32, which mates with the track grooves 31, is provided on the limiting plate 30. A pin is fixed to the top of the sleeve plate 29 by a connecting rope. A insertion hole is opened in the middle of the top of the central tube 18. When storage is required, the pin is manually inserted into the insertion hole to avoid slippage during transportation. Plate 29 can swing freely; the limiting plate 30 is rectangular and is distributed on one side of the inner wall and the inner top wall of the sleeve plate 29. The track groove 31 is correspondingly opened on the top and one side of the middle tube 18 and the telescopic tube 20. The two parts of the middle tube 18 are fixed by magnetic plates to make it more stable. The setting of the traveling wheel 32 can improve the flexibility of the construction personnel when moving the device to carry out roadbed settlement detection, and avoid the movement efficiency being affected by the large friction when it moves to the track groove 31 on the telescopic tube 20.

[0045] When using this device to detect settlement on a section of the roadbed, transport the device to the designated location, then manually pull the sliding rods 10 on both sides from inside the protective box 1 to the outside, adjusting the length of the pull-out according to the width of the road surface. At this time, the weight of the balance adjustment component 9 presses the lifting plate 7 downward, allowing the detector 2 to extend from the lifting hole 3. Simultaneously, the trigger plate 14 moves outward and gradually separates from the protrusion 16. The return spring 17 pushes the two dustproof plates 13 outward, opening the lifting hole 3 and thus preventing the detection from being interrupted. Device 2 collides with dustproof plate 13, then manually lift the end of telescopic tube 20, and then press the fixed plate 22 down so that the notch 24 passes through the limiting block 23 and moves to its bottom. Then rotate the fixed plate 22 so that the notch 24 moves away from the limiting block 23. At this time, the bottom end of the support rod 21 contacts the ground, and the universal wheel 19 separates from the ground. The device can then be supported on the roadbed by the four support rods 21, which improves the stability of the device. At this time, the construction personnel can manually move the protective box 1, thereby moving the detector 2 to detect the roadbed settlement.

[0046] After the test is completed, rotate the support rod 21 so that the notch 24 is exposed from the limiting block 23. The fixed plate 22 moves above the limiting block 23 and pushes the support rod 21 upward through the compression spring 25 so that the caster wheel 19 contacts the ground. Then, push the sliding rods 10 on both sides into the protective box 1. The sliding rods 10 can push the hinge seat 6 to move inward and drive the lifting plate 7 to lift the detector 2 and the balance adjustment component 9 upward for storage. The trigger plate 14 moves with it and slowly makes the protrusion 16 slide in the V-shaped pressure groove 15, thereby squeezing the two dustproof plates 13 inward and blocking the lifting hole 3. At this time, the detector 2 has entered the protective box 1 to avoid collision with the dustproof plate 13.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the confidentiality of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present invention and based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A roadbed settlement detection device that is easy to operate and provides high protection, characterized in that, It includes: A protective box (1) is provided inside the protective box (1) to accommodate the detector (2). A lifting hole (3) is provided on the bottom surface of the protective box (1). A horizontal mounting rod of the detector (2) is provided inside the protective box (1). The horizontal mounting rod can extend and retract up and down along the lifting hole (3). The movable guide rail is located at the left and right ends of the protective box (1), and the protective box (1) can move repeatedly along the longitudinal direction of the movable guide rail; The lifting mechanism is located inside the protective box (1) and works in conjunction with the horizontal mounting rod to control the detector (2) to retract or extend above the lifting hole (3); A dustproof mechanism is located at the lifting hole (3) and controls the opening and closing of the lifting hole (3) to prevent dust. A vertical connecting plate (4) is provided on the horizontal mounting rod, and slide rails (5) are provided on both sides of the bottom of the protective box (1). The slide rails (5) are located on the left and right sides of the lifting hole (3). Hinges (6) that can slide along the slide rails (5) are symmetrically provided on the left and right sides. A lifting plate (7) is hinged on the hinges (6). A lifting block (8) is provided between the free ends of the left and right lifting plates (7). The lifting mechanism includes: Balance adjustment component (9), which is located at the upper end of the connecting plate (4) to adjust the connecting plate (4) to keep it vertical during the lifting and lowering process; A lifting assembly is located inside the protective box (1) and is in close contact with the hinge seat (6). The lifting assembly controls the hinge seat (6) to move toward or away from the center of the protective box (1) to achieve the lifting or lowering of the lifting block (8). The lifting assembly includes sliding rods (10) set at the left and right ends of the protective box (1). The sliding rods (10) have through holes at the left and right ends of the protective box (1). The inner end of the sliding rods (10) is located at the bottom of the protective box (1) and can extend and retract into the protective box (1). Both sides of the lifting hole (3) are provided with stop blocks (11), and a guide rod (12) is provided between the stop blocks (11). The dustproof mechanism includes: Dustproof plate (13), the dustproof plate (13) is sleeved on the guide rod (12), slides on the bottom of the protective box (1), and is located on both sides of the lifting hole (3); Automatic opening and closing components are located on both sides of the protective box (1). The automatic opening and closing components automatically close or open the dustproof plate (13) after the detector (2) rises along the lifting hole (3) or before it falls. The automatic opening and closing component includes: The trigger closure component includes a trigger plate (14) fixed to the outer end of the slide rod (10). A "V"-shaped pressure groove (15) is provided on the side of the trigger plate (14) facing the dustproof plate (13). Protrusions (16) that cooperate with the pressure groove (15) are provided at both ends of the dustproof plate (13). The slide rod (10) extends inward and retracts the detector (2) into the protective box (1). The pressure groove (15) presses the protrusions (16) on the left and right dustproof plates (13) into the pressure groove (15) to close the two dustproof plates (13). The separation reset component includes a reset spring (17) provided on the guide rod (12) between the dustproof plates (13), and a storage groove for the reset spring (17) is provided on the opposite side of the dustproof plates (13).

2. The easy-to-operate and highly protective roadbed settlement detection device according to claim 1, characterized in that, The balance adjustment component (9) includes a fixed column (9-1) horizontally fixed on the connecting plate (4), and downward-opening sliding grooves (9-2) at both ends of the fixed column (9-1). Fixed rods (9-3) are fixed at both ends of the protective box (1), and the free ends of the fixed rods (9-3) slide in the sliding grooves (9-2). A counterweight (9-4) is provided on the fixed column (9-1).

3. The easy-to-operate and highly protective roadbed settlement detection device according to claim 1, characterized in that, The movable guide rail includes: The telescopic part extends or retracts the movable guide rail to lengthen or shorten the length of the movable guide rail; the telescopic part includes a central tube (18), a caster wheel (19) is provided at the bottom of the central tube (18), and telescopic tubes (20) are sleeved at both ends of the central tube (18); A support assembly is located at both ends of a movable guide rail and is used to support the lifting and lowering of the movable guide rail so that the movable guide rail is away from or placed on the ground. The support assembly includes vertical through holes at both ends of the telescopic part, a vertically movable support rod (21) is provided in the vertical through hole, a fixed plate (22) is provided at the upper end of the support rod (21), a limiting block (23) of the fixed plate (22) is provided at the upper end of the telescopic part, a notch (24) is provided on the edge of the fixed plate (22) for the limiting block (23) to pass through vertically, and a compression spring (25) is provided between the fixed plate (22) and the upper end face of the telescopic part.

4. The easy-to-operate and highly protective roadbed settlement detection device according to claim 3, characterized in that, A magnetic plate (26) is provided in the middle of the central tube (18), and an iron fixing plate (27) is provided at the connection end between the telescopic tube (20) and the central tube (18).

5. The easy-to-operate and highly protective roadbed settlement detection device according to claim 3, characterized in that, The outer end of the support rod (21) is connected to a connecting rod (28). A sleeve plate (29) that cooperates with the telescopic part is provided on the connecting rod (28). A limiting plate (30) is provided on the inner wall of the sleeve plate (29). Track grooves (31) are provided on both the middle tube (18) and the telescopic tube (20). A traveling wheel (32) that cooperates with the track groove (31) is provided on the limiting plate (30).

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