Embedded ground subsidence monitoring equipment

Abstract

The invention relates to the technical field of settlement monitoring, in particular to embedded type ground settlement monitoring equipment which comprises a settlement pipe, a magnetic ring and a displacement sensor, four sliding grooves are formed in the outer wall of the settlement pipe at equal intervals, sliding blocks are slidably connected to the inner sides of the four sliding grooves, the magnetic ring is slidably connected to the outer wall of the settlement pipe, and the sliding blocks are fixedly connected to the inner side of the magnetic ring. Through the arrangement of the conical block, the insertion rod, the limiting mechanism, the removing mechanism and other structures, in the monitoring equipment installation process, after the periphery of a sedimentation pipe is backfilled, the insertion rod on the magnetic ring is automatically extruded out and inserted into surrounding backfilled soil, then the limiting rod is pushed out of a sliding groove through the removing mechanism, and the magnetic ring can be installed conveniently. And the sliding positions of the limiting rod and the inserting rod are limited, so that the downward sliding limitation of the magnetic ring is relieved, the displacement sensor moves to the side of the magnetic ring, the magnetic ring is quickly mounted, the difficulty in positioning and fixing in the mounting process of the magnetic ring is avoided, and the mounting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of subsidence monitoring, and in particular to embedded ground subsidence monitoring equipment. Background Art

[0002] Ground subsidence, also known as ground subsidence or land subsidence, is a local downward movement (or engineering geological phenomenon) in which the surface elevation of the earth's crust is lowered due to the consolidation and compression of loose underground strata under the influence of human engineering and economic activities. It is currently a major engineering geological problem in major cities around the world. It generally manifests itself in two forms: regional subsidence and local subsidence. It can cause buildings to tilt and destroy the stability of the foundation. In coastal cities, it will cause seawater backflow, which has a great impact on production and life.

[0003] The prior art discloses a layered settlement monitoring device and its construction process with publication number CN114838703B. The settlement magnetic ring and the monitoring end are linked contactlessly through magnetic force. During settlement monitoring, there is no need to open a hole in the settlement pipe and then use a connecting piece to achieve the linkage between the settlement magnetic ring and the monitoring end. This can effectively ensure the sealing of the settlement pipe, and thus the monitoring hole does not leak liquid into the interior of the settlement pipe, effectively ensuring the service life of the electronic components in the settlement pipe, and the pipe can be buried for a long time for monitoring in soil and rock layers.

[0004] During the installation of the above-mentioned stratified settlement meter, the fixing method of the magnetic ring is relatively cumbersome. The magnetic ring usually needs to be fixed to the settlement tube by tape or other temporary fixing devices. After the borehole is backfilled, these temporary fixing devices may not be able to effectively adapt to the characteristics of the soil layer, resulting in the magnetic ring being not firmly fixed. During the backfilling process, the magnetic ring is susceptible to impact and vibration, which may cause its position to shift, affecting the measurement accuracy.

[0005] Therefore, an embedded ground subsidence monitoring device is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose an embedded ground subsidence monitoring device.

[0007] The technical scheme adopted by the present application is as follows: a buried ground subsidence monitoring device, comprising a subsidence pipe, a magnetic ring and a displacement sensor, four sliding grooves are equidistantly formed on the outer wall of the subsidence pipe, four sliding blocks are slidably connected to the inner sides of the sliding grooves, the magnetic ring is slidably connected to the outer wall of the subsidence pipe, and the sliding blocks are fixedly connected to the inner side of the magnetic ring, four circular grooves are equidistantly formed on the outer wall of the magnetic ring, and the four circular grooves pass through the outer wall of the sliding block at the side ends, four insertion rods are slidably connected to the inner sides of the circular grooves, the top end of the insertion rod on one side is inclined, a rectangular slot is formed at the top end of the circular groove, a rectangular plate is fixedly connected to the outer wall of the insertion rod at the top end, an upper spring is fixedly connected between the inner side of the rectangular slot and the side wall of the rectangular plate, a sliding plate is longitudinally slidably connected to the inner side of the subsidence pipe, a sliding cylinder is fixedly connected to the bottom end of the sliding plate, a connecting cylinder is fixedly connected to the bottom end of the sliding cylinder, a conical block is fixedly connected to the bottom end of the connecting cylinder, a limiting mechanism for limiting the sliding position of the magnetic ring is arranged below the magnetic ring, and a releasing mechanism for releasing the limitation is arranged on the connecting cylinder.

[0008] In the above technical scheme, further, the rectangular plates are slidably connected to the inner sides of the rectangular slots, the insertion rods on the other side are provided in the form of spikes, a screw rod is threadedly connected to the top end of the subsidence pipe, and the bottom end of the screw rod is rotatably connected to the top end of the sliding plate.

[0009] In the above technical scheme, further, the limiting mechanism comprises four limiting rods, the limiting rods are inserted into the sliding grooves, side rods are fixedly connected to the bottom end of the magnetic ring on the side of the limiting rods, a top slot is formed at the top end of the side rod, the top slot passes through the inner side of the circular groove above, a locking frame is slidably connected to the inner side of the top slot, a locking block is fixedly connected to the top end of the locking frame, a locking slot is formed at the bottom end of the insertion rod, the bottom end of the locking frame is provided in the form of a smooth arc surface, an extrusion block is fixedly connected to the side wall of the limiting rod, the top end of the extrusion block is inclined, the extrusion block is slidably connected to the inner side of the top slot, a fixed plate is fixedly connected to the inner side of the locking frame on the inner side of the top slot, and a limiting spring is fixedly connected between the bottom end of the fixed plate and the inner bottom end of the locking frame.

[0010] In the above technical scheme, further, a groove is formed in the side wall of the extrusion block, a right-angle block with an inclined surface is slidably connected to the inner side of the groove, a pair of positioning springs are fixedly connected between the inner side of the groove and the side wall of the right-angle block, and a positioning slot is formed in the side wall of the side rod on the side of the right-angle block.

[0011] In the above technical scheme, further, a pair of guide rods are fixedly connected to the side wall of the limiting rod, the guide rods pass through the inner side wall of the side rod, a limiting plate is fixedly connected to the side of the guide rod passing through the outer wall of the side rod, and a pair of lower springs are fixedly connected between the outer wall of the side rod and the side wall of the limiting rod.

[0012] In the above technical scheme, further, the release mechanism comprises an electric telescopic cylinder, the electric telescopic cylinder is fixedly connected to the inner wall of the connecting barrel through a support, four straight grooves are equidistantly formed in the outer wall of the connecting barrel, release rods are arranged in the inner sides of the four straight grooves, the release rods are rotatably connected to the inner sides of the straight grooves through pivots at two-thirds of the release rods, torsion springs are arranged between the rotating portions of the release rods and the straight grooves, top plates are fixedly connected to the top ends of the release rods, pull ropes are fixedly connected to the bottom ends of the top plates, and the output end of the electric telescopic cylinder is fixedly connected to a bottom plate.

[0013] In the above technical scheme, further, a circular plate is fixedly connected to the inner wall of the connecting barrel below the straight grooves, a cross-shaped groove is formed in the circular plate, four guide rollers are rotatably connected to the inner side of the cross-shaped groove, and the other ends of the pull ropes are fixedly connected to the bottom end of the bottom plate through the guide rollers.

[0014] In the above technical scheme, further, the displacement sensor is slidably connected to the outer wall of the sliding barrel, the displacement sensor and the magnetic ring are attracted to each other through magnetic force after being connected, and the displacement sensor is electrically connected to an external monitoring unit through a wire.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1. The present application can automatically extrude the insertion rod on the magnetic ring and insert it into the surrounding backfill soil after the surrounding backfill of the settlement pipe is completed, then the release mechanism pushes the limiting rod out of the sliding groove and limits the sliding position of the limiting rod and the insertion rod, thereby releasing the downward sliding limitation of the magnetic ring, moving the displacement sensor to the side of the magnetic ring, realizing the rapid installation of the magnetic ring, avoiding the positioning and fixing difficulties in the installation process of the magnetic ring, and improving the installation efficiency.

[0016] 2. The design that the limiting rod is inserted into the sliding groove can shield the sliding groove when backfilling the soil around the settlement pipe, thereby avoiding the soil falling into the sliding groove during the backfilling process, affecting the normal sliding of the subsequent magnetic ring, and affecting the measurement accuracy of the magnetic ring, making the subsequent magnetic ring slide more smoothly, and reducing the problem of inaccurate measurement data caused by the jamming of the magnetic ring. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front perspective structural schematic view of the monitoring device of the present application; Figure 2 It is a front perspective structural schematic view of the settlement pipe of the present application; Figure 3 It is a front perspective structural schematic view of the settlement pipe of the present application; Figure 4 It is an enlarged structural schematic view of part A of the present application; Figure 3 application; Figure 5 The appended Figure 3 A schematic diagram of the partially enlarged structure at point B in the middle; Figure 6 This is a schematic diagram of the overall appearance of the slide plate and the conical block of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the magnetic ring of the present invention from a top view; Figure 8 This is a schematic diagram of the overall appearance of the electric telescopic cylinder, the circular plate and one of the release rods of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the partial appearance of the insertion rod, side rod and limit rod separated according to the present invention.

[0018] In the figure: 1. sedimentation tube; 2. magnetic ring; 3. displacement sensor; 4. slide; 5. slider; 6. plug rod; 7. slide plate; 8. slide tube; 9. connecting tube; 10. rectangular plate; 11. upper spring; 12. screw; 13. limit rod; 14. side rod; 15. top groove; 16. locking frame; 17. locking block; 18. locking groove; 19. extrusion block; 20. groove; 21. right-angle block; 22. positioning spring; 23. positioning groove; 24. guide rod; 25. limit plate; 26. lower spring; 27. fixed plate; 28. limit spring; 29. ​​electric telescopic cylinder; 30. bracket; 31. straight groove; 32. release rod; 33. top plate; 34. round plate; 35. guide roller; 36. pull rope; 37. bottom plate; 38. conical block. DETAILED DESCRIPTION In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] During actual use, it was found that during the installation process of the existing stratified settlement meter, the fixing method of the magnetic ring 2 is relatively cumbersome. The magnetic ring 2 usually needs to be fixed to the settlement tube 1 by tape or other temporary fixing devices. After the borehole is backfilled, these temporary fixing devices may not be able to effectively adapt to the characteristics of the soil layer, resulting in the magnetic ring 2 being not firmly fixed. During the backfilling process, the magnetic ring 2 is susceptible to impact and vibration, which may cause its position to shift, affecting the measurement accuracy. In order to solve the above problems, the following structure is specially invented.

[0021] like Figures 1-9The buried ground settlement monitoring equipment shown includes a settlement tube 1, a magnetic ring 2 and a displacement sensor 3. The outer wall of the settlement tube 1 is provided with four chute grooves 4 at equal intervals. The inner sides of the four chute grooves 4 are all slidably connected with sliders 5. The magnetic ring 2 is slidably connected to the outer wall of the settlement tube 1, and the slider 5 is fixedly connected to the inner side of the magnetic ring 2. The outer wall of the magnetic ring 2 is provided with four circular grooves at equal intervals, and the side ends of the four circular grooves pass through the outer wall of the slider 5. The inner sides of the circular grooves are all slidably connected with plug rods 6, and the plug rods 6 are tilted at the top end close to one side. A rectangular groove is provided at the top of each circular groove. A rectangular plate 10 is fixedly connected to the top of the outer wall of the insertion rod 6. An upper spring 11 is fixedly connected between the inner side of the rectangular groove and the side wall of the rectangular plate 10. A slide plate 7 is longitudinally slidably connected to the inner side of the sedimentation tube 1. The bottom end of the slide plate 7 is fixedly connected to a slide cylinder 8. The bottom end of the slide cylinder 8 is fixedly connected to a connecting cylinder 9. The bottom end of the connecting cylinder 9 is fixedly connected to a conical block 38. A limiting mechanism for limiting the sliding position of the magnetic ring 2 is provided below the magnetic ring 2, and a release mechanism for releasing the limit is provided on the connecting cylinder 9. The rectangular plates 10 are all slidably connected to the inner side of the rectangular groove, and the side away from the insertion rod 6 is set to a spike shape, which is convenient for the insertion rod 6 to be quickly inserted into the backfill soil, realizing a quick connection between the magnetic ring 2 and the backfill soil. The top of the sedimentation tube 1 is threadedly connected with a screw rod 12, and the bottom end of the screw rod 12 is rotatably connected to the top of the slide plate 7. A polygonal block can be set on the screw rod 12 to facilitate connection with the sleeve of the electric gun. When installing the settlement monitoring equipment, first drill a hole at the settlement monitoring point, put the settlement tube 1 into the hole, and then backfill the soil around the settlement tube 1 in the hole (it should be noted that the backfilling process should not affect the normal sliding of the magnetic ring 2). Then, an electric gun with a sleeve can be used to drive the polygonal block on the screw 12 to rotate, thereby driving the screw 12 to rotate. Since the screw 12 is threadedly connected to the settlement tube 1, it will drive the screw 12 to move downward in a spiral, thereby pushing the slide 7 to move downward. At the same time, the sliding cylinder 8, the connecting cylinder 9 and the conical block 38 are driven to move downward, and then the inclined surface of the conical block 38 will squeeze the inclined surface of the side close to the insertion rod 6, and then squeeze the insertion rod 6 to slide to the side away from it, and at the same time drive the rectangular plate 10 to slide in the rectangular groove and compress the upper spring 11, so that the spiked end of the insertion rod 6 is inserted into the surrounding backfill soil, and then the conical block 38 slides out from the side close to the insertion rod 6, and the connecting cylinder 9 moves to the side of the insertion rod 6, maintaining the squeezing of the insertion rod 6, thereby achieving rapid fixation of the magnetic ring 2 and the surrounding backfill soil.

[0022] To sum up, through the design of the above structure, the magnetic ring 2 can be fixed on the sedimentation tube 1 during the installation of the monitoring equipment. Then, after the backfill around the sedimentation tube 1 is completed, the insertion rod 6 on the magnetic ring 2 can be automatically squeezed out and inserted into the surrounding backfill soil, thereby realizing a quick connection between the magnetic ring 2 and the surrounding backfill soil.

[0023] On the basis of the above embodiment, it was found during use that if the sliding position of the magnetic ring 2 is not restricted during the installation process, it will not only affect the rapid fixation of the magnetic ring 2, but also affect the subsequent monitoring accuracy. In order to solve the above problem, the above structure was further improved.

[0024] The limiting mechanism includes a limiting rod 13, which is provided with four limiting rods 13. The four limiting rods 13 are all inserted into the inner side of the slide groove 4. The bottom end of the magnetic ring 2 is fixedly connected to the side rod 14 relative to the position next to the limiting rod 13. The top of the side rod 14 is provided with a top groove 15, and the top of the top groove 15 passes through the inner side of the circular groove. The inner side of the top groove 15 is slidably connected with a locking frame 16, and the top of the locking frame 16 is fixedly connected with a locking block 17. The bottom end of the outer wall of the insertion rod 6 is provided with a locking groove 18, and the bottom end of the locking frame 16 is set to a smooth arc surface. The side wall of the limiting rod 13 is fixedly connected with an extrusion block 19, the top of the extrusion block 19 is inclined, and the extrusion block 19 is slidably connected to the inner side of the top groove 15. The inner side of the top groove 15 is fixedly connected with a fixing plate 27 relative to the inner position of the locking frame 16. The bottom end of the fixing plate 27 is fixedly connected to the bottom end of the inner bottom end of the locking frame 16. A groove 20 is provided on the side wall of the extrusion block 19, and a right-angle block 21 with an inclined surface is slidably connected to the inner side of the groove 20. A pair of positioning springs 22 are fixedly connected between the inner side of the groove 20 and the side wall of the right-angle block 21. A positioning groove 23 is provided on the side wall of the side rod 14 relative to the position next to the right-angle block 21. The setting of the right-angle block 21 can not only play a positioning role in the sliding of the limit rod 13, but also when the monitoring equipment is removed from the monitoring point, the right-angle block 21 can be installed and slid into the groove 20, which can quickly release the sliding restriction of the limit rod 13, so that the limit rod 13 is moved into the slide groove 4, thereby limiting the sliding position of the magnetic ring 2; A pair of guide rods 24 are fixedly connected to the side walls of the limit rod 13, and the guide rods 24 pass through and are slidably connected to the inner side walls of the side rods 14. The guide rods 24 pass through one side of the outer wall of the side rods 14 and are fixedly connected to the limit plates 25. The limit plates 25 can limit the sliding positions of the guide rods 24 and the limit rods 13, thereby improving the stability of the equipment during operation. A pair of lower springs 26 are fixedly connected between the outer walls of the side rods 14 and the side walls of the limit rods 13. The release mechanism includes an electric telescopic cylinder 29, which is fixedly connected to the inner wall of the connecting tube 9 through a bracket 30. Four straight grooves 31 are equidistantly provided on the outer wall of the connecting tube 9. It should be noted that the width of the straight grooves 31 is smaller than the width of the insertion rod 6. When the straight grooves 31 are moved to the side of the insertion rod 6, it will not affect the squeezing effect on the insertion rod 6. A release rod 32 is provided on the inner side of each of the four straight grooves 31. Two-thirds of the release rod 32 is rotatably connected to the inner side of the straight groove 31 through a rotating shaft. The rotating part of the release rod 32 is connected to the straight groove 31 by a torsion spring. The top end of the release rod 32 is fixedly connected to a top plate 33, and the bottom end of the top plate 33 is fixedly connected to a pull rope 36. The output end of the electric telescopic cylinder 29 is fixedly connected to a bottom plate 37. The inner wall of the connecting cylinder 9 is fixedly connected with a circular plate 34 below the straight slot 31, a cross slot is formed through the circular plate 34, four guide rollers 35 are rotatably connected to the inner side of the cross slot, and the other ends of the pull ropes 36 are fixedly connected to the bottom end of the bottom plate 37 through the guide rollers 35. The displacement sensor 3 is slidably connected to the outer wall of the sliding cylinder 8, and the displacement sensor 3 and the magnetic ring 2 are attracted to each other by magnetic force after being connected. During the installation of the monitoring device, when the magnetic ring 2 is fixed in the backfill soil, the locking groove 18 on the insertion rod 6 moves above the locking block 17 at this time, and then the electric gun can be continuously driven to rotate the screw rod 12, thereby driving the sliding plate 7, the sliding cylinder 8 and the connecting cylinder 9 to continue to move downward, and then when the straight slot 31 moves beside the limiting rod 13, the electric gun can be controlled to stop running, and then the electric telescopic cylinder 29 is controlled to drive the bottom plate 37 to move upward, thereby driving the plurality of pull ropes 36 to move upward, so that the pull ropes 36 pull the top plate 33 to drive the release rod 32 to flip downward around the hinge, thereby making the bottom end of the release rod 32 flip upward and gradually compressing the torsion spring between the release rod 32 and the straight slot 31, and then the bottom end of the release rod 32 gradually extrudes the limiting rod 13 to move beside the side rod 14, while driving the guide rod 24 to slide on the side rod 14, while compressing the lower spring 26, thereby pushing the limiting rod 13 out of the sliding groove 4 and releasing the downward sliding restriction of the magnetic ring 2. During the process, the movement of the limiting rod 13 will drive the extrusion block 19 to move, at this time the inclined surface on the extrusion block 19 will gradually extrude the circular arc surface at the bottom end of the locking frame 16, so that the locking frame 16 slides upward, while gradually compressing the limiting spring 28 in the locking frame 16, thereby driving the locking block 17 on the locking frame 16 to move upward and insert into the corresponding locking groove 18, thereby realizing the position limitation of the insertion rod 6, and at the same time, when the extrusion block 19 slides into the top groove 15, the side wall of the top groove 15 will extrude the inclined surface of the right angle block 21, thereby extruding the right angle block 21 into the groove 20 and compressing the positioning spring 22, and then when the extrusion block 19 extrudes the locking block 17 into the locking groove 18, the right angle block 21 moves beside the positioning groove 23, thereby releasing the extrusion of the right angle block 21, and then the right angle block 21 is pushed out of the groove 20 under the elastic force of the positioning spring 22, thereby making the plane of the side wall of the right angle block 21 clamped beside the positioning groove 23, realizing the position limitation of the extrusion block 19 and the limiting rod 13; Finally, the displacement sensor 3 on the connecting cylinder 9 moves beside the magnetic ring 2, and the displacement sensor 3 and the magnetic ring 2 are attracted to each other, while releasing the sliding restriction of the magnetic ring 2, so that the magnetic ring 2 can slide along the settlement pipe 1, and when the soil body settles, the magnetic ring 2 sinks with the soil body, and the displacement sensor 3 follows the magnetic ring 2 to slide downward on the sliding cylinder 8, and then transmits the downward movement data to the monitoring unit to calculate the settlement amount.

[0025] To sum up, through the design of the above structure, after the magnetic ring 2 is connected to the backfill soil, the limit rod 13 can be pushed out of the slide groove 4 through the release mechanism, and the sliding position of the limit rod 13 and the insertion rod 6 can be limited, thereby releasing the downward sliding restriction of the magnetic ring 2, allowing the displacement sensor 3 to move to the side of the magnetic ring 2, realizing the rapid installation of the magnetic ring 2, avoiding the positioning and fixing difficulties during the installation of the magnetic ring 2, and improving the installation efficiency. At the same time, when backfilling the soil around the sedimentation tube 1, the limit rod 13 plays a shielding role on the slide groove 4, thereby avoiding the soil falling into the slide groove 4 during the backfilling process, and then affecting the normal sliding of the subsequent magnetic ring 2, thereby affecting the measurement accuracy of the magnetic ring 2, making the subsequent sliding of the magnetic ring 2 smoother, and reducing the problem of inaccurate measurement data caused by the sticking of the magnetic ring 2.

[0026] The basic principles, main features and advantages of the present invention are shown and described above.

[0027] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An embedded ground subsidence monitoring device, comprising a subsidence tube (1), a magnetic ring (2) and a displacement sensor (3), characterized in that: The outer wall of the sedimentation tube (1) is provided with four chute grooves (4) at equal intervals, and the inner sides of the four chute grooves (4) are all slidably connected with a slider (5), the magnetic ring (2) is slidably connected to the outer wall of the sedimentation tube (1), and the slider (5) is fixedly connected to the inner side of the magnetic ring (2), the outer wall of the magnetic ring (2) is provided with four circular grooves at equal intervals, and the side ends of the four circular grooves pass through the outer wall of the slider (5), and the inner sides of the circular grooves are all slidably connected with an insertion rod (6), and the top ends of the insertion rods (6) are all inclined on one side, and the top ends of the circular grooves are provided with rectangular grooves, and the insertion rods ( 6) A rectangular plate (10) is fixedly connected to the top of the outer wall, an upper spring (11) is fixedly connected between the inner side of the rectangular groove and the side wall of the rectangular plate (10), a slide plate (7) is longitudinally slidably connected to the inner side of the sedimentation tube (1), a slide cylinder (8) is fixedly connected to the bottom end of the slide cylinder (7), a connecting cylinder (9) is fixedly connected to the bottom end of the connecting cylinder (9), a conical block (38) is fixedly connected to the bottom end of the connecting cylinder (9), a limiting mechanism for limiting the sliding position of the magnetic ring (2) is provided below the magnetic ring (2), and a releasing mechanism for releasing the limit is provided on the connecting cylinder (9).

2. The embedded ground subsidence monitoring device according to claim 1, characterized in that: The rectangular plates (10) are all slidably connected to the inner side of the rectangular groove, the side of the insertion rod (6) away from the other side is configured as a spike, the top end of the sedimentation tube (1) is threadedly connected to a screw rod (12), and the bottom end of the screw rod (12) is rotatably connected to the top end of the slide plate (7).

3. The embedded ground subsidence monitoring device according to claim 1, characterized in that: The limiting mechanism includes a limiting rod (13), four limiting rods (13) are provided, and the four limiting rods (13) are all inserted into the inner side of the slide groove (4). The bottom end of the magnetic ring (2) is fixedly connected to a side rod (14) at a position next to the limiting rod (13). The top end of the side rod (14) is provided with a top groove (15), and the top of the top groove (15) is provided through the inner side of the circular groove. The inner side of the top groove (15) is slidably connected to a locking frame (16), and the top end of the locking frame (16) is fixedly connected to a locking block (17). The bottom end of the outer wall of the rod (6) is provided with a locking groove (18), the bottom end of the locking frame (16) is set as a smooth arc surface, the side wall of the limiting rod (13) is fixedly connected with an extrusion block (19), the top end of the extrusion block (19) is set at an angle, and the extrusion block (19) is slidably connected to the inner side of the top groove (15), the inner side of the top groove (15) is fixedly connected with a fixing plate (27) relative to the inner side of the locking frame (16), and a limiting spring (28) is fixedly connected between the bottom end of the fixing plate (27) and the inner bottom end of the locking frame (16).

4. The embedded ground subsidence monitoring device according to claim 3, characterized in that: The side wall of the extrusion block (19) is provided with a groove (20), the inner side of the groove (20) is slidably connected to a right-angle block (21) with an inclined surface, a pair of positioning springs (22) are fixedly connected between the inner side of the groove (20) and the side wall of the right-angle block (21), and the side wall of the side rod (14) is provided with a positioning groove (23) at a position next to the right-angle block (21).

5. The embedded ground subsidence monitoring device according to claim 3, characterized in that: A pair of guide rods (24) are fixedly connected to the side wall of the limit rod (13), and the guide rods (24) are slidably connected to the inner side wall of the side rod (14). The guide rods (24) pass through one side of the outer wall of the side rod (14) and are fixedly connected to the limit plate (25). A pair of lower springs (26) are fixedly connected between the outer wall of the side rod (14) and the side wall of the limit rod (13).

6. The embedded ground subsidence monitoring device according to claim 1, characterized in that: The release mechanism comprises an electric telescopic cylinder (29), the electric telescopic cylinder (29) being fixedly connected to the inner wall of the connecting cylinder (9) via a bracket (30), the outer wall of the connecting cylinder (9) being provided with four straight grooves (31) at equal intervals, the inner sides of the four straight grooves (31) being provided with a release rod (32), two-thirds of the release rod (32) being rotatably connected to the inner sides of the straight grooves (31) via a rotating shaft, the rotating portion of the release rod (32) being connected to the straight grooves (31) via a torsion spring, the top end of the release rod (32) being fixedly connected to a top plate (33), the bottom end of the top plate (33) being fixedly connected to a pull rope (36), and the output end of the electric telescopic cylinder (29) being fixedly connected to a bottom plate (37).

7. The embedded ground subsidence monitoring device according to claim 6, characterized in that: A circular plate (34) is fixedly connected to the inner wall of the connecting cylinder (9) at a position below the straight groove (31). A cross groove is formed through the circular plate (34). Four guide rollers (35) are rotatably connected to the inner side of the cross groove. The other ends of the pull ropes (36) pass through the bottom of the guide rollers (35) and are fixedly connected to the bottom end of the bottom plate (37).

8. The embedded ground subsidence monitoring device according to claim 1, characterized in that: The displacement sensor (3) is slidably connected to the outer wall of the slide cylinder (8), and after the displacement sensor (3) and the magnetic ring (2) are connected, they are attracted to each other by magnetic force. The displacement sensor (3) is electrically connected to the external monitoring unit via a wire.

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