Anti-sedimentation buried detection device

Abstract

An anti-sedimentation buried detection device comprises a buried protective cylinder, a buried upper cover, a buried inner cover and a detector, an anti-sedimentation circular ring is fixedly arranged on the outer circumference of the buried protective cylinder in the circumferential direction, the detector is fixedly embedded in the buried protective cylinder, the upper end of the detector is located on the upper portion in the buried protective cylinder, and the lower end of the detector is located on the lower portion in the buried protective cylinder. The buried inner cover is arranged in the buried protective cylinder and covers and presses the top of the detector, and the buried upper cover is installed at the upper end in the buried protective cylinder in a threaded mode and covers and presses the top of the buried inner cover. The pavement anti-settling device has an anti-settling function, can be effectively integrated with the pavement, and is high in mounting stability, high in pressure bearing capacity, simple in structure, convenient to maintain in the later period and high in corrosion resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of underground detectors, and specifically, to a ground-embedded detection device with anti-settlement function. Background Art

[0002] As an important part of the smart city, urban lifeline underground detectors have been constantly innovated in recent years. To protect the detectors, it has become increasingly common to install the detectors in underground cylinders. Some underground detectors need to be installed on motor vehicle roads, which requires that the underground cylinder should have good pressure-bearing capacity. However, the existing underground cylinders do not have the anti-settlement function. Especially for roads with complex passing vehicles, the existing underground cylinders cannot be effectively integrated with the road surface, resulting in poor installation stability, poor pressure-bearing capacity, and difficult subsequent maintenance.

[0003] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide a ground-embedded detection device with anti-settlement function. The utility model has the anti-settlement function, can be effectively integrated with the road surface, has strong installation stability, strong pressure-bearing capacity, simple structure, convenient subsequent maintenance, and strong corrosion resistance.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a ground-embedded detection device with anti-settlement function, including a ground-embedded protection cylinder, a ground-embedded upper cover, a ground-embedded inner cover, and a detector. An anti-settlement ring is fixedly arranged on the outer circumference of the ground-embedded protection cylinder along the circumferential direction. The detector is fixedly embedded in the ground-embedded protection cylinder, and the upper end of the detector is located in the upper part inside the ground-embedded protection cylinder. The ground-embedded inner cover is arranged inside the ground-embedded protection cylinder and covers and presses on the top of the detector. The ground-embedded upper cover is threadedly installed at the upper end inside the ground-embedded protection cylinder and covers and presses on the top of the ground-embedded inner cover.

[0006] Based on the above, the ground-embedded protection cylinder includes a plastic cylinder body and a metal cylinder body. The plastic cylinder body is coaxially and penetratingly embedded in the metal cylinder body. The upper end of the plastic cylinder body is located in the upper part inside the metal cylinder body. There is a first limit structure between the outer circumference of the plastic cylinder body and the inner circumference of the metal cylinder body to limit the position of the plastic cylinder body. The detector is coaxially embedded in the plastic cylinder body. There is a second limit structure between the outer circumference of the detector and the inner circumference of the plastic cylinder body to limit the position of the detector. The upper end of the detector leaks out of the upper end of the plastic cylinder body and is located inside the metal cylinder body. The ground-embedded inner cover is buckled on the upper end of the plastic cylinder body and covers and presses on the top of the detector. The ground-embedded upper cover is threadedly connected to the upper end inside the metal cylinder body and covers and presses on the top of the ground-embedded inner cover. The anti-settlement ring is integrally formed and sleeved and fixedly connected to the outer circumference of the lower end of the metal cylinder body.

[0007] Based on the above, a dust-proof net is further installed at the bottom of the plastic cylinder body.

[0008] Based on the above, a limiting ring is integrally formed on the inner circumference of the lower end of the metal barrel body. The plastic barrel body is a multi-stage stepped barrel body, and the diameters of the various barrel bodies of the plastic barrel body gradually decrease from top to bottom. Calculated from top to bottom, the outer diameter of the first-stage barrel body of the plastic barrel body is greater than the inner diameter of the limiting ring and less than or equal to the inner diameter of the metal barrel body. The outer diameter of the second-stage barrel body of the plastic barrel body is less than or equal to the inner diameter of the limiting ring. A first-stage outer step is formed between the outer circle of the lower end of the first-stage barrel body of the plastic barrel body and the outer circle of the upper end of the second-stage barrel body. The plastic barrel body is inserted through the metal barrel body from top to bottom coaxially. The second-stage and lower barrel bodies of the plastic barrel body pass through the limiting ring coaxially downward. The first-stage outer step is correspondingly clamped on the limiting ring. The first-stage outer step and the limiting ring constitute the first limiting structure. The first-stage barrel body of the plastic barrel body is placed inside the metal barrel body and its height is less than the height of the metal barrel body. A first-stage inner step is formed between the inner circle of the lower end of the first-stage barrel body of the plastic barrel body and the inner circle of the upper end of the second-stage barrel body. The outer diameter of the detector is less than the inner diameter of the second-stage barrel body of the plastic barrel body. An outer sleeve with an open lower end is integrally formed on the outer circumference of the upper end of the detector. The outer diameter of the outer sleeve is greater than the inner diameter of the second-stage barrel body of the plastic barrel body and less than the inner diameter of the first-stage barrel body of the plastic barrel body. The detector is inserted through the first-stage barrel body and the second-stage barrel body of the plastic barrel body coaxially from top to bottom. The lower end of the outer sleeve is correspondingly clamped on the first-stage inner step. The outer sleeve and the first-stage inner step constitute the second limiting structure.

[0009] Based on the above, an internal thread is provided on the inner circumference of the upper end of the metal barrel body, and an external thread matching the internal thread is provided on the outer circumference of the upper end of the buried upper cover. The buried upper cover is connected to the upper end inside the metal barrel body through the thread fit of the external thread and the internal thread. The top of the buried upper cover is flush with the upper end of the metal barrel body.

[0010] Based on the above, a plurality of barrel body reinforcing ribs arranged in a circumferential array are welded between the lower side part of the outer circumference of the metal barrel body and the anti-settlement ring. The barrel body reinforcing ribs are arc-transition rib plates.

[0011] Based on the above, a plurality of arc-shaped bolt through holes arranged in a circumferential array are also opened on the anti-settlement ring along the circumferential direction.

[0012] Based on the above, the dust-proof net is a net barrel structure with an open upper end. The inner diameter of the dust-proof net is greater than the outer diameter of the last-stage barrel body of the plastic barrel body. The outer diameter of the dust-proof net is less than or equal to the outer edge diameter of the last-stage outer step of the plastic barrel body. The axial dimension of the dust-proof net is greater than or equal to the axial dimension of the last-stage barrel body of the plastic barrel body. The dust-proof net is coaxially sleeved on the last-stage barrel body of the plastic barrel body. The upper end of the dust-proof net is in pressing contact with the last-stage outer step of the plastic barrel body. The outer circumference of the upper end of the dust-proof net is fixedly connected to the outer circumference of the upper end of the last-stage barrel body of the plastic barrel body through a plurality of fastening bolts arranged in a circumferential array;

[0013] The inner circle of the limiting ring is provided with a number of bolt passing notches that are arranged in a circumferential array and correspond to each fastening bolt one by one.

[0014] Based on the above, a signal passing window is provided in the middle of the top cover of the buried upper cover, and a number of disassembly notches are provided on the top surface of the top cover of the buried upper cover.

[0015] Based on the above, a weight reduction notch is provided on the bottom surface of the lower end of the metal barrel body.

[0016] The utility model has substantial features and progress compared with the prior art. Specifically, an anti-settlement ring is fixedly arranged along the circumferential direction on the outer circumference of the buried protection barrel of the utility model. The anti-settlement ring can increase the effective contact between the buried protection barrel and the bottom of the ground, thereby effectively enhancing the contact reliability between the barrel body of the buried protection barrel and the ground, enabling the buried protection barrel to be stably fixed on the ground with strong installation stability. Moreover, the buried protection barrel can be effectively integrated with the road surface, reducing the exposed area of the road surface and improving the pressure-bearing capacity of the equipment. During later maintenance, by opening the buried upper cover, the detector can be quickly taken out, and the maintenance is convenient.

[0017] The buried protection barrel of the utility model is mainly composed of a plastic barrel body and a metal barrel body. The plastic barrel body is coaxially and penetratingly embedded in the metal barrel body, and the detector is coaxially embedded in the plastic barrel body. The plastic barrel body improves the economy of the product and has strong corrosion resistance. The metal barrel body can effectively protect the plastic barrel body and improve the pressure-bearing capacity of the equipment. The anti-settlement ring is integrally formed and sleeved and fixedly connected to the outer circumference of the lower end of the metal barrel body. A number of circumferentially arrayed barrel body reinforcing ribs are welded between the lower side part of the outer circumference of the metal barrel body and the anti-settlement ring. On the one hand, it can enhance the structural strength of the metal barrel body, and on the other hand, after hardening and backfilling, it can effectively prevent the metal barrel body from rotating.

[0018] A dust-proof net is also installed at the bottom of the plastic barrel body of the utility model, which not only ensures the air permeability of the detection device but also avoids sediment from entering the inside of the plastic barrel body, ensuring the cleanliness inside the plastic barrel body. Description of the Drawings

[0019] Figure 1 is the structural explosion diagram of the utility model.

[0020] Figure 2 is the installation schematic diagram of the utility model.

[0021] Figure 3 is the cross-sectional view of the utility model.

[0022] Figure 4 is the top view of the utility model.

[0023] Figure 5 is the axonometric view of the metal barrel body of the utility model.

[0024] Figure 6 It is the top view of the metal barrel body of the present utility model.

[0025] Figure 7 It is the bottom view of the metal barrel body of the present utility model

[0026] In the figure: 1. buried upper cover; 2. buried inner cover; 3. detector; 4. anti-settlement ring; 5. plastic barrel body; 6. metal barrel body; 7. dust-proof net; 8. limit ring; 9. outer sleeve; 10. internal thread; 11. external thread; 12. barrel body reinforcing rib; 13. arc-shaped bolt through-hole; 14. fastening bolt; 15. bolt passing notch; 16. signal passing window; 17. disassembly notch; 18. weight reduction notch; 19. hardened backfill; 20. hardened road surface; 21. earth; 22. first hole. Specific embodiments

[0027] The technical solution of the present utility model will be further described in detail below through specific embodiments.

[0028] Embodiment 1

[0029] As Figures 1 to 7 shown, a buried detection device for preventing settlement includes a buried protection barrel, a buried upper cover 1, a buried inner cover 2 and a detector 3. An anti-settlement ring 4 is fixedly arranged along the circumferential direction on the outer circumference of the buried protection barrel. The detector 3 is fixedly embedded in the buried protection barrel, and the upper end of the detector 3 is located in the upper part inside the buried protection barrel. The buried inner cover 2 is arranged inside the buried protection barrel and covers and presses on the top of the detector 3. The buried upper cover 1 is threadedly installed at the upper end inside the buried protection barrel and covers and presses on the top of the buried inner cover 2. The anti-settlement ring 4 can effectively increase the contact area between the buried protection barrel and the earth, ensure that the barrel body of the buried protection barrel can be stably fixed on the earth, and has strong installation stability. Moreover, the buried protection barrel can be effectively integrated with the road surface, reduce the exposed area of the road surface, and improve the pressure-bearing capacity of the equipment.

[0030] The buried protection cylinder includes a plastic cylinder body 5 and a metal cylinder body 6. The plastic cylinder body 5 is coaxially and penetratingly installed inside the metal cylinder body 6. The upper end of the plastic cylinder body 5 is located in the upper inner part of the metal cylinder body 6. There is a first limiting structure between the outer circumference of the plastic cylinder body 5 and the inner circumference of the metal cylinder body 6 to limit the position of the plastic cylinder body 5. The detector 3 is coaxially installed inside the plastic cylinder body 5. There is a second limiting structure between the outer circumference of the detector 3 and the inner circumference of the plastic cylinder body 5 to limit the position of the detector 3. The upper end of the detector 3 protrudes from the upper end of the plastic cylinder body 5 and is located inside the metal cylinder body 6. The buried inner cover 2 is buckled on the upper end of the plastic cylinder body 5 and covers and presses on the top of the detector 3. The buried upper cover 1 is threadedly connected to the upper inner end of the metal cylinder body 6 and covers and presses on the top of the buried inner cover 2. The anti-settlement ring 4 is integrally formed and sleeved and fixedly connected to the outer circumference of the lower end of the metal cylinder body 6. The plastic cylinder body 5 improves the economy of the product and has strong corrosion resistance. The metal cylinder body 6 can improve the pressure-bearing capacity of the equipment and protect the plastic cylinder body 5.

[0031] A dust-proof net 7 is also installed at the bottom of the plastic cylinder body 5. The dust-proof net 7 not only ensures the air permeability of the detection device but also prevents sediment from entering the inside of the plastic cylinder body 5, ensuring the cleanliness inside the plastic cylinder body 5.

[0032] A limiting ring 8 is integrally formed on the inner circumference of the lower end of the metal cylinder body 6. The plastic cylinder body 5 is a three-stage stepped cylinder. The diameters of the various stages of the plastic cylinder body 5 gradually decrease from top to bottom. Counting from top to bottom, the outer diameter of the first-stage cylinder of the plastic cylinder body 5 is greater than the inner diameter of the limiting ring 8 and less than or equal to the inner diameter of the metal cylinder body 6. The outer diameter of the second-stage cylinder of the plastic cylinder body 5 is less than or equal to the inner diameter of the limiting ring 8. A first-stage outer step is formed between the lower outer circle of the first-stage cylinder and the upper outer circle of the second-stage cylinder of the plastic cylinder body 5. The plastic cylinder body 5 penetrates and is inserted into the metal cylinder body 6 from top to bottom. The second-stage and lower parts of the plastic cylinder body 5 coaxially pass through the limiting ring 8 downward. The first-stage outer step is correspondingly clamped on the limiting ring 8. The first-stage outer step and the limiting ring 8 constitute the first limiting structure. The first-stage cylinder of the plastic cylinder body 5 is placed inside the metal cylinder body 6 and its height is less than the height of the metal cylinder body 6. A first-stage inner step is formed between the lower inner circle of the first-stage cylinder and the upper inner circle of the second-stage cylinder of the plastic cylinder body 5. The outer diameter of the detector 3 is less than the inner diameter of the second-stage cylinder of the plastic cylinder body 5. An outer sleeve 9 with an open lower end is integrally formed on the outer circumference of the upper end of the detector 3. The outer diameter of the outer sleeve 9 is greater than the inner diameter of the second-stage cylinder of the plastic cylinder body 5 and less than the inner diameter of the first-stage cylinder of the plastic cylinder body 5. The detector 3 is coaxially inserted into the first-stage cylinder and the second-stage cylinder of the plastic cylinder body 5 from top to bottom. The lower end of the outer sleeve 9 is correspondingly clamped on the first-stage inner step. The outer sleeve 9 and the first-stage inner step constitute the second limiting structure.

[0033] The inner circumference of the upper end of the metal cylinder body 6 is provided with an internal thread 10, and the outer circumference of the upper end of the buried upper cover 1 is provided with an external thread 11 that matches the internal thread 10. The buried upper cover 1 is connected to the upper end inside the metal cylinder body 6 through the thread fit of the external thread 11 and the internal thread 10, and the top of the buried upper cover 1 is flush with the upper end of the metal cylinder body 6. The buried upper cover 1 can prevent the internal thread 10 and the external thread 11 from being damaged by a motor vehicle.

[0034] The installation process of this detection device is as follows:

[0035] (1) Use a water drill to drill a first hole 22 on the ground with a diameter slightly larger than the maximum diameter of the plastic cylinder body 5. The diameter of the first hole 22 is smaller than the diameter of the anti-settlement ring 4, and the depth of the first hole 22 is greater than the distance between the buried upper cover 1 and the bottom of the dust-proof net 7;

[0036] (2) Then use a water drill to ream the upper part of the first hole 22 to drill a second hole with a diameter larger than the diameter of the anti-settlement ring 4. The depth of the second hole is equal to the height of the metal cylinder body 6. The first hole 22 and the second hole form a stepped hole with a larger upper part and a smaller lower part;

[0037] (3) Place this detection device directly into the first hole 22 and the second hole. The second-stage and lower parts of the plastic cylinder body 5 are placed in the first hole 22, the anti-settlement ring 4 is placed on the stepped surface formed by the first hole 22 and the second hole, and the metal cylinder body 6 is placed in the second hole;

[0038] (4) Backfill the second hole with road surface hardening and ensure that the top surface of the buried upper cover 1 is flush with the road surface.

[0039] When the detector 3 needs to be repaired and maintained, remove the buried upper cover 1 and take out the buried inner cover 2, then the detector 3 can be taken out, which is convenient and fast.

[0040] The metal cylinder body 6 is made of stainless steel or aluminum alloy.

[0041] Embodiment 2

[0042] Different from Embodiment 1, as Figure 2 、 Figure 5 and Figure 6 shown, several circumferentially arranged cylinder body strengthening ribs 12 are welded between the lower side part of the outer circumference of the metal cylinder body 6 and the anti-settlement ring 4. The cylinder body strengthening ribs 12 are arc-transition rib plates. On the one hand, the cylinder body strengthening ribs 12 can enhance the structural strength of the metal cylinder body 6. On the other hand, after hardening and backfilling, it can effectively prevent the metal cylinder body 6 from rotating. And because the cylinder body strengthening ribs 12 are arc-transition rib plates, stress concentration is avoided, and the service life of the metal cylinder body 6 is effectively increased.

[0043] Embodiment 3

[0044] Different from the first embodiment, as Figure 4 , Figure 5 , Figure 6 and Figure 7 shown, a plurality of arc-shaped bolt through-holes 13 arranged in a circumferential array are further formed in the anti-settlement ring 4 along the circumferential direction. The arc-shaped bolt through-holes 13 can be used to install anchor bolts to fix the anti-settlement ring 4, and then fix the metal barrel body 6 to the ground. If the anchor bolts are not installed, when backfilling and hardening, the arc-shaped bolt through-holes 13 are grouted to also reinforce the metal barrel body 6.

[0045] Embodiment Four

[0046] Different from the first embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 shown, the dust-proof net 7 is a net barrel structure with an open upper end. The inner diameter of the dust-proof net 7 is greater than the outer diameter of the last-stage barrel of the plastic barrel body 5, the outer diameter of the dust-proof net 7 is less than or equal to the outer edge diameter of the last-stage outer step of the plastic barrel body 5, the axial dimension of the dust-proof net 7 is greater than or equal to the axial dimension of the last-stage barrel of the plastic barrel body 5, the dust-proof net 7 is coaxially sleeved on the last-stage barrel of the plastic barrel body 5, the upper end of the dust-proof net 7 is in pressing contact with the last-stage outer step of the plastic barrel body 5, and the outer circumference of the upper end of the dust-proof net 7 is fixedly connected to the outer circumference of the upper end of the last-stage barrel of the plastic barrel body 5 through a plurality of fastening bolts 14 arranged in a circumferential array;

[0047] A plurality of bolt through slots 15 arranged in a circumferential array and corresponding to the fastening bolts 14 one by one are formed in the inner circle of the limit ring 8. When the plastic barrel body 5 installed with the dust-proof net 7 is assembled with the metal barrel body 6, the bolt heads of the fastening bolts 14 respectively pass through the bolt through slots 15, which not only improves the contact stability between the metal barrel body 6 and the plastic barrel body 5, but also ensures that the plastic barrel body 5 installed with the dust-proof net 7 can be smoothly installed into the metal barrel body 6.

[0048] The dust-proof net 7 of this embodiment is made of metal material, such as stainless steel or aluminum alloy. In other embodiments, the dust-proof net 7 can also be made of plastic material.

[0049] Embodiment Five

[0050] Different from the first embodiment, as Figure 1 , Figure 3 , Figure 4 and Figure 7As shown in the figure, a signal passing window 16 is provided in the middle of the top cover of the buried upper cover 1, and a number of disassembly notches 17 are provided on the top surface of the top cover of the buried upper cover 1. The disassembly notches 17 facilitate the disassembly of the buried upper cover 1. A number of pairs of disassembly notches 17 are provided in pairs, and each pair of disassembly notches 17 is arranged in a circumferential array.

[0051] A weight reduction notch 18 is provided on the bottom surface of the lower end of the metal cylinder body 6, which can reduce the weight of the metal cylinder body 6. Two weight reduction notches 18 are symmetrically arranged at the center, and the weight reduction notches 18 are arranged in an arc groove along the circumferential direction.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. An underground detection device for preventing settlement, characterized in that: It includes a buried protection cylinder, a buried upper cover, a buried inner cover and a detector. An anti-settlement ring is fixedly arranged along the circumferential direction on the outer circumference of the buried protection cylinder. The detector is fixedly embedded in the buried protection cylinder, and the upper end of the detector is in the upper part inside the buried protection cylinder. The buried inner cover is arranged inside the buried protection cylinder and covers and presses on the top of the detector. The buried upper cover is threadedly installed at the upper end inside the buried protection cylinder and covers and presses on the top of the buried inner cover.

2. The anti-settlement buried detection device according to claim 1, characterized in that: The buried protection cylinder includes a plastic cylinder body and a metal cylinder body. The plastic cylinder body is coaxially and penetratingly embedded in the metal cylinder body. The upper end of the plastic cylinder body is in the upper inner part of the metal cylinder body. There is a first limit structure between the outer circumference of the plastic cylinder body and the inner circumference of the metal cylinder body to limit the position of the plastic cylinder body. The detector is coaxially embedded in the plastic cylinder body. There is a second limit structure between the outer circumference of the detector and the inner circumference of the plastic cylinder body to limit the position of the detector. The upper end of the detector leaks out of the upper end of the plastic cylinder body and is located inside the metal cylinder body. The buried inner cover is buckled on the upper end of the plastic cylinder body and covers and presses on the top of the detector. The buried upper cover is threadedly connected to the upper end inside the metal cylinder body and covers and presses on the top of the buried inner cover. The anti-settlement ring is integrally formed, sleeved, fixedly connected to the outer circumference of the lower end of the metal cylinder body.

3. The anti-settlement buried detection device according to claim 2, characterized in that: A dust-proof net is also installed at the bottom of the plastic cylinder body.

4. The anti-settlement buried detection device according to claim 3, characterized in that: A limit ring is integrally formed on the inner circumference of the lower end of the metal cylinder body. The plastic cylinder body is a multi-stage stepped cylinder body, and the diameters of the various cylinder bodies of the plastic cylinder body gradually decrease from top to bottom. Counting from top to bottom, the outer diameter of the first-stage cylinder body of the plastic cylinder body is greater than the inner diameter of the limit ring and less than or equal to the inner diameter of the metal cylinder body. The outer diameter of the second-stage cylinder body of the plastic cylinder body is less than or equal to the inner diameter of the limit ring. A first-stage outer step is formed between the outer circle of the lower end of the first-stage cylinder body and the outer circle of the upper end of the second-stage cylinder body of the plastic cylinder body. The plastic cylinder body penetrates and is inserted into the metal cylinder body from top to bottom. The second-stage and the following parts of the cylinder body of the plastic cylinder body coaxially pass through the limit ring downward. The first-stage outer step is correspondingly clamped on the limit ring. The first-stage outer step and the limit ring constitute the first limit structure. The first-stage cylinder body of the plastic cylinder body is placed inside the metal cylinder body and its height is less than the height of the metal cylinder body. A first-stage inner step is formed between the inner circle of the lower end of the first-stage cylinder body and the inner circle of the upper end of the second-stage cylinder body of the plastic cylinder body. The outer diameter of the detector is less than the inner diameter of the second-stage cylinder body of the plastic cylinder body. An outer sleeve with an open lower end is integrally formed on the outer circumference of the upper end part of the detector. The outer diameter of the outer sleeve is greater than the inner diameter of the second-stage cylinder body of the plastic cylinder body and less than the inner diameter of the first-stage cylinder body of the plastic cylinder body. The detector is coaxially inserted into the first-stage cylinder body and the second-stage cylinder body of the plastic cylinder body from top to bottom. The lower end of the outer sleeve is correspondingly clamped on the first-stage inner step. The outer sleeve and the first-stage inner step constitute the second limit structure.

5. The anti-settlement buried detection device according to claim 2, wherein: Internal threads are provided on the inner circumference of the upper end part of the metal cylinder body. External threads matching the internal threads are provided on the outer circumference of the upper end part of the buried upper cover. The buried upper cover is connected to the upper end inside the metal cylinder body through the threaded fit of the external threads and the internal threads. The top of the buried upper cover is flush with the upper end of the metal cylinder body.

6. The anti-settlement buried detection device according to claim 2, wherein: A plurality of circumferentially arrayed cylinder body reinforcing ribs are welded between the lower side part of the outer circumference of the metal cylinder body and the anti-settlement ring. The cylinder body reinforcing ribs are arc-transition rib plates.

7. The anti-settlement buried detection device according to claim 1 or 2, characterized in that: A plurality of arc-shaped bolt through holes arranged in a circumferential array are also provided along the circumferential direction of the anti-settlement ring.

8. The anti-settlement buried detection device according to claim 4, wherein: The dust-proof net is a net barrel structure with an open upper end. The inner diameter of the dust-proof net is larger than the outer diameter of the last-stage barrel of the plastic barrel body. The outer diameter of the dust-proof net is less than or equal to the outer edge diameter of the last-stage outer step of the plastic barrel body. The axial dimension of the dust-proof net is greater than or equal to the axial dimension of the last-stage barrel of the plastic barrel body. The dust-proof net is coaxially sleeved on the last-stage barrel of the plastic barrel body. The upper end of the dust-proof net is in pressing contact with the last-stage outer step of the plastic barrel body. The outer circumference of the upper end portion of the dust-proof net is fixedly connected to the outer circumference of the upper end portion of the last-stage barrel of the plastic barrel body through a plurality of fastening bolts arranged in a circumferential array. A plurality of bolt passing notches arranged in a circumferential array and corresponding to each fastening bolt one by one are provided in the inner circle of the limit ring.

9. The anti-settlement buried detection device according to claim 1 or 2, characterized in that: A signal passing window is provided in the middle of the top cover of the buried upper cover, and a plurality of disassembly notches are provided on the top surface of the top cover of the buried upper cover.

10. The anti-settlement buried detection device according to claim 2, characterized in that: A weight reduction notch is provided on the bottom surface of the lower end of the metal barrel body.

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