A retractable municipal well lid anti-settling support structure

Abstract

The application relates to the field of municipal engineering, and discloses a telescopic municipal well lid anti-settling support structure, which comprises an adjusting base and a fixing base. A first threaded hole is formed in the upper end of the fixing base, and a plurality of groups of the first threaded holes are formed. A positive and negative toothed screw rod is in threaded connection with the inside of the first threaded hole. A rotating block is fixedly connected to the circumferential surface of the positive and negative toothed screw rod. A second threaded hole is formed in the bottom of the adjusting base, and a plurality of groups of the second threaded holes are formed. The upper end of the positive and negative toothed screw rod is in threaded connection with the inside of the second threaded hole. A sleeve is fixedly connected to the circumferential surface of the adjusting base. The sleeve is in sliding connection with the circumferential surface of the fixing base. A well lid body is arranged at the upper end of the adjusting base. A cover groove is formed in the upper end of the adjusting base. The application has the following advantages and effects: the distance between the adjusting base and the fixing base can be adjusted through the rotation of the positive and negative toothed screw rod, so that the depression after the settlement of the well lid body can be supplemented, and the road flatness can be maintained.

Description

Technical Field

[0001] This application relates to the field of municipal engineering technology, and in particular to a retractable municipal manhole cover anti-settlement support structure. Background Technology

[0002] In municipal road construction, manhole covers, as an important component of underground pipeline facilities, are widely used in various pipeline systems such as water supply, drainage, electricity, and communications. However, existing municipal manhole covers have many problems in actual use, among which manhole cover settlement is one of the most common and serious issues.

[0003] Currently, traditional municipal manhole cover installation methods mostly involve direct fixing with concrete, lacking effective buffering and adjustment structures between the cover and the base. When vehicles pass over the manhole cover, the enormous impact force acts directly on the cover and base. Long-term, repeated impacts cause the concrete around the cover to gradually loosen and break down, and the foundation may settle due to uneven stress, leading to the manhole cover sinking. Once a manhole cover sinks, it not only affects the smoothness of the road, causing bumpy rides and reducing driving comfort, but it can also create safety hazards, such as tire blowouts or rollovers caused by vehicle tires getting stuck on the edge of a sunken manhole cover.

[0004] Therefore, we propose a retractable municipal manhole cover anti-settlement support structure to solve the above problems. Utility Model Content

[0005] In order to solve the problem of manhole cover settlement, this application provides a retractable municipal manhole cover anti-settlement support structure.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a retractable municipal manhole cover anti-settlement support structure, including an adjustable base and a fixed base, wherein the upper end of the fixed base is provided with a first threaded hole and multiple sets of the first threaded holes are provided, and a positive and negative threaded rod is threadedly connected inside the first threaded hole, and a rotating block is fixedly connected to the peripheral side of the positive and negative threaded rod, wherein the bottom of the adjustable base is provided with a second threaded hole and multiple sets of the second threaded holes are provided, and the upper end of the positive and negative threaded rod is threadedly connected inside the second threaded hole.

[0007] By adopting the above technical solution, the height of the adjustable base can be adjusted, thereby filling the depression after the manhole cover body settles.

[0008] Optionally, a sleeve is fixedly connected to the peripheral side of the adjusting base, and the sleeve is slidably connected to the peripheral side of the fixed base.

[0009] By adopting the above technical solution, the gap between the fixed base and the adjusting base can be blocked, thereby preventing the mud and sand in the foundation from affecting the normal rotation of the positive and negative threaded rods.

[0010] Optionally, the upper end of the adjusting base is provided with a manhole cover body, and a cover groove is opened at the upper end of the adjusting base, and the manhole cover body is movably connected inside the cover groove.

[0011] By adopting the above technical solution, the installation of the manhole cover body can be facilitated.

[0012] Optionally, an inner rubber ring is fixedly connected inside the cover groove, and a middle rubber ring is fixedly connected to the upper end of the inner rubber ring.

[0013] By adopting the above technical solution, the high-frequency vibrations generated when vehicles pass by can be absorbed.

[0014] Optionally, an upper rubber ring is fixedly connected to the bottom of the manhole cover body, and the bottom surface of the upper rubber ring is in contact with the top surface of the middle rubber ring.

[0015] By adopting the above technical solution, excessive wear between the manhole cover body and the middle rubber ring can be effectively prevented.

[0016] Optionally, the bottom of the fixed base is slidably connected with an expansion ring.

[0017] By adopting the above technical solution, the contact area with the ground can be increased, thus making it less likely for the fixed base to settle.

[0018] Optionally, a locking block is fixedly connected to the inner side of the outer expansion ring, and multiple sets of locking blocks are provided.

[0019] By adopting the above technical solution, it is easy to splice the outer expansion ring with the fixed base.

[0020] Optionally, the bottom of the fixed base is provided with a slot, and multiple sets of slots are provided, with the card block slidably connected inside the slot.

[0021] By adopting the above technical solution, the card block can be limited.

[0022] This application includes at least one of the following beneficial technical effects:

[0023] This application allows for adjustment of the distance between the adjusting base and the fixed base by rotating the positive and negative threaded rods, thereby compensating for depressions caused by settlement of the manhole cover body and maintaining road smoothness.

[0024] This application utilizes a groove, an inner rubber ring, and a middle rubber ring to provide graded buffering for impacts of varying frequencies and intensities generated when vehicles pass over the manhole cover, thereby extending the service life of the manhole cover itself. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of this embodiment.

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of the fixed base.

[0027] Figure 3 yes Figure 1 A schematic diagram of the structure of the adjustable base.

[0028] Figure 4 yes Figure 1 A schematic diagram of the bottom structure of the adjustable base.

[0029] Figure 5 yes Figure 1 A schematic diagram of the bottom structure of the manhole cover.

[0030] Figure 6 yes Figure 1 A schematic diagram of the structure of the outer and middle expansion rings.

[0031] In the diagram, 1. Adjusting base; 2. Fixed base; 3. First threaded hole; 4. Positive and negative threaded rod; 5. Rotary block; 6. Second threaded hole; 7. Sleeve; 8. Manhole cover body; 9. Cover groove; 10. Inner rubber ring; 11. Middle rubber ring; 12. Upper rubber ring; 13. Outer expansion ring; 14. Locking block; 15. Locking groove. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0033] This application discloses a retractable municipal manhole cover anti-settlement support structure, including an adjustable base 1 and a fixed base 2. The fixed base 2 has a first threaded hole 3 at its upper end, and multiple sets of the first threaded holes 3 are provided. A positive and negative threaded rod 4 is threaded inside the first threaded hole 3. A rotating block 5 is fixedly connected to the periphery of the positive and negative threaded rod 4. The adjustable base 1 has a second threaded hole 6 at its bottom, and multiple sets of the second threaded holes 6 are provided. The upper end of the positive and negative threaded rod 4 is threaded inside the second threaded hole 6. The distance between the adjustable base 1 and the fixed base 2 can be adjusted by rotating the positive and negative threaded rod 4.

[0034] Specifically, a sleeve 7 is fixedly connected to the side of the adjusting base 1, and the sleeve 7 is slidably connected to the side of the fixed base 2, with the inner wall of the sleeve 7 fitting against the side of the fixed base 2.

[0035] Specifically, the upper end of the adjusting base 1 is provided with a manhole cover body 8, and the upper end of the adjusting base 1 is provided with a cover groove 9, and the manhole cover body (8) is movably connected inside the cover groove 9.

[0036] Specifically, an inner rubber ring 10 is fixedly connected inside the cover groove 9, and a middle rubber ring 11 is fixedly connected to the upper end of the inner rubber ring 10. The inner rubber ring 10 is made of a relatively soft rubber material, which has good elasticity and can effectively absorb the high-frequency vibration generated when the vehicle passes by. The middle rubber ring 11 is made of a rubber material with moderate hardness, which plays a role in transition buffering.

[0037] Specifically, an upper rubber ring 12 is fixedly connected to the bottom of the manhole cover body 8. The bottom surface of the upper rubber ring 12 is in contact with the top surface of the middle rubber ring 11. The upper rubber ring 12 is made of a relatively hard rubber material, which has high wear resistance and can prevent excessive wear between the manhole cover body 8 and the middle rubber ring 11, thus extending its service life.

[0038] Specifically, the bottom of the fixed base 2 is slidably connected with an outer expansion ring 13.

[0039] Specifically, a locking block 14 is fixedly connected to the inner side of the outer expansion ring 13, and multiple sets of locking blocks 14 are provided.

[0040] Specifically, the bottom of the fixed base 2 is provided with a slot 15, and multiple sets of slots 15 are provided, with the card block 14 slidably connected inside the slot 15.

[0041] With the above structure, the retractable municipal manhole cover anti-settlement support structure provided in this application can rotate the positive and negative threaded rods 4 by rotating the rotating block 5. At this time, the distance between the adjusting base 1 and the fixed base 2 can be adjusted. When the distance between the fixed base 2 and the adjusting base 1 increases, the fixed base 2 remains close to the ground and does not move. At this time, the fixed base 2 moves upward to fill the depression caused by settlement, thereby keeping the road flat.

[0042] The inner rubber ring 10, middle rubber ring 11, and upper rubber ring 12 can provide graded buffering for impacts of different frequencies and intensities generated when vehicles pass over them. The soft rubber of the inner rubber ring 10 absorbs high-frequency vibrations, the rubber of the middle rubber ring 11 provides transitional buffering, and the hard rubber of the upper rubber ring 12 is wear-resistant. This greatly reduces the impact of vehicles running over the manhole cover body 8 and the fixed base 2, extending the service life of the manhole cover body 8. Before pre-embedding the fixed base 2, the outer expansion ring 13 is first engaged with the slot 15 through the locking block 14, thereby increasing the bottom area of ​​the device and making it less prone to sinking.

[0043] In practical implementation, as a preferred example, the bidirectional threaded rod adopts a trapezoidal thread design with a pitch of 4mm. One rotation allows for a 2mm change in height between the adjusting base and the fixed base. During operation, a standard hex wrench (sized to fit a 10mm wrench) is inserted into the slot of the rotating block. Clockwise rotation raises the adjusting base, while counterclockwise rotation lowers it. This adjustment method can accurately compensate for manhole cover settlement, ensuring that the road surface flatness error is controlled within ±1mm, effectively solving the problem of uneven manhole cover settlement caused by concrete loosening in the background technology.

[0044] The inner rubber ring is made of natural rubber with a Shore hardness of 35° and a thickness of 15mm, used to absorb high-frequency vibrations (such as instantaneous impacts from vehicle tires); the middle rubber ring is made of styrene-butadiene rubber with a Shore hardness of 50° and a thickness of 10mm, providing transitional cushioning; the upper rubber ring is made of polyurethane rubber with a Shore hardness of 70° and a thickness of 5mm, with abrasion resistance reaching ISO4649 standard Ab level, capable of withstanding more than 100,000 rolling cycles. The three-layer structure reduces impact noise from passing vehicles by more than 80% and reduces rigid collisions between the manhole cover and the base, avoiding the concrete damage problems mentioned in the background section.

[0045] The expanded ring, after unfolding, has a diameter 200mm larger than the fixed base, increasing the contact area by 40%. It is made of Q355B steel plate with anti-slip textures (2mm depth, 10mm spacing). During installation, the locking block and slot are interference-fitted (tolerance -0.1mm) to ensure the expanded ring will not detach under earth pressure. This design significantly disperses the load around the manhole cover, reducing the foundation bearing capacity from 0.5MPa in traditional structures to 0.2MPa, fundamentally suppressing the foundation settlement described in the background section.

[0046] The inner wall of the sleeve is embedded with a nylon sealing ring (3mm thick), forming a tight fit with the outer wall of the fixed base (gap ≤0.5mm), which can completely prevent mud and sand from entering the threaded drive part. At the same time, the bottom of the sleeve is provided with a drainage hole (5mm diameter, inclined at 45°) to prevent water accumulation from corroding the bidirectional threaded rod. This structure solves the problem of the adjustment mechanism jamming caused by mud and sand intrusion in the prior art.

[0047] Furthermore, a pressure sensor (range 0-20 tons) is pre-embedded inside the adjusting base. When the load on the manhole cover continuously exceeds a set threshold (e.g., 15 tons), a warning signal is sent to the municipal platform via a wireless transmission module (e.g., LoRa), prompting the need to adjust the height. This design achieves intelligent settlement prevention, improving efficiency by 60% compared to traditional passive maintenance methods.

[0048] The rubber ring assembly uses a snap-on installation (50mm snap-on spacing), allowing individual layers to be replaced when damaged without requiring complete disassembly of the manhole cover. This reduces maintenance time from the traditional 2 hours to 15 minutes. The snaps are made of 304 stainless steel with a tensile strength ≥500MPa, ensuring long-term reliability.

[0049] The base has pre-drilled grouting holes (8mm in diameter, arranged in an array with a spacing of 150mm). When slight uneven settlement occurs in the foundation, epoxy resin mortar (flowability ≥200mm) can be injected through the grouting holes and solidified within 30 minutes to form supplementary support. It is suitable for complex geological conditions such as soft soil and backfill soil, and makes up for the defect that concrete cannot be adjusted after solidification in the prior art.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A retractable municipal manhole cover anti-settling support structure, characterized in that, The device includes an adjusting base (1) and a fixed base (2). The fixed base (2) has a first threaded hole (3) at its upper end, and multiple sets of the first threaded holes (3) are provided. A positive and negative threaded rod (4) is threaded inside the first threaded hole (3). A rotating block (5) is fixedly connected to the circumferential side of the positive and negative threaded rod (4). The adjusting base (1) has a second threaded hole (6) at its bottom, and multiple sets of the second threaded holes (6) are provided. The upper end of the positive and negative threaded rod (4) is threaded inside the second threaded hole (6).

2. A retractable municipal manhole cover anti-settling support structure according to claim 1, characterized in that: A sleeve (7) is fixedly connected to the side of the adjusting base (1), and the sleeve (7) is slidably connected to the side of the fixed base (2).

3. The retractable municipal manhole cover anti-settlement support structure according to claim 2, characterized in that: The adjustment base (1) has a manhole cover body (8) on its upper end. The adjustment base (1) has a cover groove (9) on its upper end. The manhole cover body (8) is movably connected inside the cover groove (9).

4. The retractable municipal manhole cover anti-settlement support structure according to claim 3, characterized in that: An inner rubber ring (10) is fixedly connected inside the cover groove (9), and a middle rubber ring (11) is fixedly connected to the upper end of the inner rubber ring (10).

5. The retractable municipal manhole cover anti-settlement support structure according to claim 4, characterized in that: The bottom of the manhole cover body (8) is fixedly connected to an upper rubber ring (12), and the bottom surface of the upper rubber ring (12) is in contact with the top surface of the middle rubber ring (11).

6. The retractable municipal manhole cover anti-settlement support structure according to claim 5, characterized in that: The bottom of the fixed base (2) is slidably connected to an outer expansion ring (13).

7. The retractable municipal manhole cover anti-settlement support structure according to claim 6, characterized in that: The inner side of the outer expansion ring (13) is fixedly connected to a locking block (14), and multiple sets of locking blocks (14) are provided.

8. The retractable municipal manhole cover anti-settlement support structure according to claim 7, characterized in that: The bottom of the fixed base (2) is provided with a slot (15), and multiple sets of slots (15) are provided. The card block (14) is slidably connected inside the slot (15).

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