Stepless lifting inspection well cover

Abstract

The present application belongs to the municipal technical field, and relates to a stepless lifting inspection well lid, which comprises a well seat and a cap, the outer wall of the well seat is provided with well seat outer threads, the inner wall of the cap is provided with cap inner threads, the cap inner threads can be threadedly connected with the well seat outer threads, and a movable cover plate of an inspection hole is arranged on the cap; a plurality of positioning pin piece insertion holes are arranged on the upper bottom edge of the cap, the well seat outer threads are configured as multi-section intermittent threads, the positioning pin piece insertion holes are consistent with the intermittent number of the threads of the outer wall of the well seat, the positioning pin piece insertion holes are overlapped with the circumference of the well seat outer threads in the vertical direction, and the distance from the positioning pin piece insertion holes to the center of the cap is equal to the distance from the center of the well seat to the well seat outer threads. The inspection well lid can economically and safely solve the technical problem of stepless lifting of the elevation of the well lid during road construction, long-term use of the road, secondary paving of the road and the like, and can realize safe locking of the stepless lifting of the cap through the positioning pin pieces.

Description

Technical Field

[0001] This invention belongs to the field of municipal technology and relates to a manhole cover that can be raised and lowered steplessly. Background Technology

[0002] With urban development, underground pipelines such as sewage pipes, stormwater pipes, and power lines have become an important part of urban infrastructure. A large number of inspection wells are installed along these pipelines, distributed across various underlying surfaces such as lawns, plazas, and roads. However, as urban construction and renovation become more frequent, the type and elevation of the underlying surface also change often, while the elevation of the various underground pipelines and inspection wells remains largely unchanged. This results in uneven elevations between the inspection wells and the underlying surface, creating a bumpy and uneven landscape.

[0003] Taking urban sewage pipe inspection wells as an example, due to construction and maintenance needs, pipes are often laid under roads, while inspection wells are often placed on the surface of open urban roads. For newly built roads, the construction of inspection wells precedes the road surface paving. When there is an error between the construction elevation of the inspection well cover and the design elevation, it is often forcibly leveled with the paving layer and the inspection well cover, but this will affect the original road drainage design. For roads that have been in use for a long time, since the inspection wells are constructed with brick masonry foundations while the road surface is constructed with multiple layers of compaction, the settlement coefficients of the inspection well cover and the road surface are different. After long-term compaction, a height difference will appear, and the road surface is often lower than the inspection well cover. For secondary paved roads, due to the updating and reinforcement of urban road paving materials, there are always slight adjustments to the road surface elevation. However, traditional inspection well covers on the road are often rigidly connected to the lower inspection well wall and do not have the function of raising or lowering. The secondary paved road surface and the original inspection well cover are inconsistent in elevation. Since the cost of modifying inspection wells is high, the slope is generally laid along the edge of the original inspection well cover, thus creating the "pain of inspection well covers" that road users deeply resent. This problem seriously troubles infrastructure construction workers and the general public. There is an urgent need for a continuously adjustable manhole cover to solve the technical problem of low-cost elevation adjustment of traditional manhole covers during road construction, long-term road use, and secondary road paving. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a continuously adjustable manhole cover. This manhole cover can economically and safely solve the technical problem of needing to raise and lower the elevation of the manhole cover during road construction, long-term road use, and secondary road paving, and can achieve the safe locking of the continuously adjustable cap through positioning pins.

[0005] According to the technical solution of the present invention: a stepless lifting manhole cover, characterized in that: it includes a manhole base and a cap, the outer wall of the manhole base is provided with an external thread, the inner wall of the cap is provided with an internal thread, the internal thread of the cap can be threadedly connected with the external thread of the manhole base, and a movable inspection port cover is provided on the cap.

[0006] The top edge of the cap is provided with several positioning pin insertion holes. The external thread of the well seat is constructed as a multi-segment discontinuous thread. The number of thread discontinuities in the positioning pin insertion holes and the outer wall of the well seat are the same. The positioning pin insertion holes overlap with the circumference of the external thread of the well seat in the vertical direction. The distance from the positioning pin insertion hole to the center of the cap is equal to the distance from the center of the well seat to the external thread of the well seat.

[0007] When the cap is rotated to any position, the locating pin can be inserted into the outer surface of the well seat's external thread along one of the locating pin holes to lock the cap.

[0008] As a further improvement of the present invention, the external thread of the well seat is configured as four discontinuous threads evenly distributed along the outer wall of the well seat, each discontinuous thread being 1 / 8 of the circumference of the outer wall of the well seat, and equidistantly and axially symmetrically distributed.

[0009] The positioning pin insertion hole is provided with four holes, and the length of each positioning pin insertion hole is 1 / 16 of the circumference of the cap. Each positioning pin insertion hole is arranged along the circumferential direction of the edge of the cap, and the four positioning pin insertion holes are arranged sequentially at the first, sixth, eleventh and sixteenth segments of the 16-division circumference.

[0010] As a further improvement of the present invention, the top surface of the cap is provided with a stepped countersunk hole, and the edge overlap of the inspection port movable cover plate is supported on the stepped countersunk hole.

[0011] As a further improvement of the present invention, the top two ends of the positioning pin are clamped with pin lifting buckles.

[0012] As a further improvement of the present invention, the pin buckle is a C-shaped steel wire component.

[0013] As a further improvement of the present invention, the lower end of the outer wall of the well base is constructed with an integrally connected flange.

[0014] As a further improvement of the present invention, the cap is a thin-walled cylinder.

[0015] As a further improvement of the present invention, the internal thread of the cap is a multi-turn thread.

[0016] As a further improvement of the present invention, the internal thread of the cap begins at the bottom end of the inner wall of the cap.

[0017] The technical advantages of this invention are as follows: This invention provides a continuously adjustable manhole cover. It features external threads on the base and internal threads on the cap. The continuous lifting and lowering of the cap is achieved by the relative movement of the internal and external threads when the cap is rotated. This adapts to the need for leveling the surrounding surface of the manhole cover at different elevations, solving the persistent problem of uneven manhole covers affecting traffic experience in scenarios such as road surfaces. Furthermore, the multi-turn internal thread on the cap and the multi-turn intermittent external thread on the base allow for maximum lifting and lowering of the manhole cover by fully utilizing its height. This invention also uses locating pins to lock the cap's rotation, preventing relative sliding and rotation between the cap and the base, ensuring safety and stability during use. The design of the non-axially aligned locating pin insertion holes on the cap, combined with the intermittently aligned threads on the base, ensures that the locating pins can be inserted into any position when the cap is rotated. This ingenious design economically solves the technical challenge of locking continuously rotating caps. This manhole cover has a simple structure, is easy to construct, and is simple to install. The use of continuously adjustable manhole covers can solve the technical problem of adjusting the elevation of manhole covers at a low cost during road construction, long-term road use, and secondary road paving. With continuously adjustable manhole covers, the foundation of the manhole covers does not need to be adjusted with road maintenance and renovation throughout the entire road lifecycle. This significantly reduces the cost, technical difficulty, and construction cycle of road maintenance and renovation, improves road surface smoothness, enhances traffic experience and urban appearance, and achieves numerous beneficial effects, making it highly valuable for widespread application. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the manhole cover of the present invention.

[0019] Figure 2 This is a top view of the manhole cover.

[0020] Figure 3 yes Figure 2 Cross-sectional view of manhole cover AA.

[0021] Figure 4 yes Figure 2 BB cross-sectional view of the manhole cover cap.

[0022] Figure 5 This is a top view of the manhole cover's base.

[0023] Figure 6 This is a front view of the locating pin of the manhole cover.

[0024] Figure 7 This is a side view of the locating pin of the manhole cover.

[0025] Figure 8This is a top view of the locating pin of the manhole cover. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1-8 The components include a well base 1, a well base external thread 11, a thread interruption 12, a cap 2, a positioning pin insertion hole 21, an inspection port movable cover 22, a cap internal thread 23, a positioning pin 3, and a positioning pin lifting buckle 31.

[0028] like Figure 1-8 As shown, the present invention is a stepless lifting manhole cover, including a manhole base 1 and a cap 2. The outer wall of the manhole base 1 is provided with an external thread 11, and the inner wall of the cap 2 is provided with an internal thread 23. The internal thread 23 of the cap can be threadedly connected with the external thread 11 of the manhole base. An inspection port movable cover plate 22 is provided on the cap 2.

[0029] The top edge of the cap 2 is provided with several positioning pin insertion holes 21. The external thread 11 of the well seat is constructed as a multi-segment discontinuous thread. The number of positioning pin insertion holes 21 is the same as the number of thread breaks 12 on the outer wall of the well seat 1. The positioning pin insertion holes 21 overlap with the circumference of the external thread 11 of the well seat in the vertical direction. The distance from the positioning pin insertion hole 21 to the center of the cap 2 is equal to the distance from the center of the well seat 1 to the external thread 11 of the well seat.

[0030] When the cap 2 is rotated to any position, the positioning pin 3 can be inserted into the outer surface of the well seat external thread 11 along one of the positioning pin insertion holes 21 to lock the cap 2.

[0031] The outer wall of the well base 1 is provided with four sections of intermittent threads. Each section of intermittent threads is 1 / 8 of the circumference of the outer wall of the well base 1 and is equidistantly and symmetrically distributed to ensure that it can stably and evenly support the load transmitted by the cap 2 during use.

[0032] Four positioning pin insertion holes 21 are provided, each with a length of 1 / 16 of the circumference of the cap 2. Each positioning pin insertion hole 21 is arranged along the circumferential direction of the edge of the cap 2. Furthermore, the positioning pin insertion holes 21 are sequentially located at the first, sixth, eleventh, and sixteenth segments of the 16 equal divisions of the cap 2's circumference. This ensures that when the cap 2 is rotated to any position, the positioning pin 3 can be inserted into a position without the external thread 11 of the well seat, thereby locking the cap 2 and ensuring the safe use of the well cover 2.

[0033] The top surface of the cap 2 is provided with a stepped countersunk hole, and the edge overlap of the inspection port movable cover 22 is supported on the stepped countersunk hole.

[0034] The positioning pin 3 has an overall arc shape. The top two ends of the positioning pin 3 are clamped with pin lifting buckles 31, which are C-shaped steel wire parts, so that the positioning pin 3 can be easily pulled out when necessary.

[0035] The lower part of the outer wall of well seat 1 has an integrally connected flange.

[0036] like Figure 3 , 4 As shown, the cap 2 is a thin-walled cylinder, and the internal thread 23 of the cap is a multi-turn thread to ensure that the cap 2 can fully engage with the intermittent external thread 11 of the well seat when rotated to any position, thus ensuring the stability and safety of the cap 2; the internal thread 23 of the cap starts from the bottom of the inner wall of the cap 2 to ensure that the height of the cap 2 is fully utilized as the lifting height.

[0037] Taking a manhole installed on a road as an example, during road construction, the manhole base 1 can be installed on the upper part of the underground manhole wall. The lower edge of the cap 2 is rotated to half the height of the external thread 11 of the manhole base, and a positioning pin 3 is inserted one by one into the positioning pin insertion hole 21 on the cap 2 until a positioning pin insertion hole 21 can be fully inserted into the positioning pin 3. Due to the combination of the non-axially aligned positioning pin insertion hole 21 design on the cap 2 and the axially aligned intermittent external thread 11 of the manhole base 1, the cap 2 can be rotated to any position where the positioning pin 3 can be inserted into the intermittent position of the external thread 11 of the manhole base. After the positioning pin 3 is inserted, the cap 2 is locked and cannot rotate relative to the manhole base 1. At this time, the upper surface of the manhole cover 2 is leveled with the designed elevation of the road surface, which can achieve the flatness of the manhole cover and the newly built road surface without any movement. After long-term use, road surfaces will settle due to continuous rolling. However, since manhole foundations are generally more robust, the settlement will be smaller. The manhole cover will then protrude from the road surface. At this time, the positioning pin 3 can be pulled out by lifting the positioning pin 31, thus canceling the rotation lock of the manhole cover 2. Since the lower edge of the manhole cover 2 is locked at the middle position of the height of the external thread 11 of the manhole seat when the road is newly built, the cap 2 has room for adjustment after the lock is canceled. By rotating the cap 2, the upper surface can be lowered to level the manhole cover with the road surface and achieve a flat road surface. After leveling, the positioning pin 3 can be inserted into the positioning pin hole 21 to lock the rotation of the cap 2, preventing rotation during repeated rolling and ensuring safety in later use. When roads are re-paved after long-term use, the pavement is often thickened to reinforce it. However, manhole pits in the road are generally not rebuilt. If the manhole cover is not slightly raised, the re-paved road surface will be higher than the manhole cover, and the manhole pits on the leveled road surface will reappear. In this case, simply pull the positioning pin 3 on the manhole cover cap 2 out of the positioning pin insertion hole 21 by pulling the positioning pin lifting buckle 31. The cap rotation lock will be canceled again. Simply rotate the cap 2 again to level the cap 2 with the re-paved road surface. After leveling, insert the positioning pin 3 into the positioning pin insertion hole 21 to lock the rotation of the cap 2, preventing rotation during repeated rolling and ensuring safety and stability in later use. By adopting continuously adjustable manhole covers, the foundations of the manhole covers do not need to be adjusted with road maintenance and renovation throughout the entire road lifecycle. This can greatly reduce the cost of road maintenance and renovation, reduce the technical difficulty of road maintenance and renovation, shorten the construction cycle of road maintenance and renovation, improve road surface smoothness, improve road traffic experience and urban appearance, and achieve many beneficial effects.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuously adjustable manhole cover, characterized in that: It includes a well seat (1) and a cap (2). The outer wall of the well seat (1) is provided with an external well seat thread (11), and the inner wall of the cap (2) is provided with an internal cap thread (23). The internal cap thread (23) can be threadedly connected with the external well seat thread (11). An inspection port movable cover plate (22) is provided on the cap (2). The top edge of the cap (2) is provided with several positioning pin insertion holes (21). The external thread (11) of the well seat is constructed as a multi-segment discontinuous thread. The number of positioning pin insertion holes (21) and the number of thread breaks (12) on the outer wall of the well seat (1) are the same. The positioning pin insertion holes (21) overlap with the circumference of the external thread (11) of the well seat in the vertical direction. The distance from the positioning pin insertion hole (21) to the center of the cap (2) is equal to the distance from the center of the well seat (1) to the external thread (11) of the well seat. When the cap (2) is rotated to any position, the positioning pin (3) can be inserted into the outer surface of the well seat external thread (11) along one of the positioning pin insertion holes (21) to lock the cap (2). The external thread (11) of the well seat is set as four discontinuous threads evenly distributed along the outer wall of the well seat (1). Each discontinuous thread is 1 / 8 of the circumference of the outer wall of the well seat (1) and is equidistantly axially symmetrically distributed. The positioning pin insertion hole (21) is provided in four parts. The length of each positioning pin insertion hole (21) is 1 / 16 of the circumference of the cap (2). Each positioning pin insertion hole (21) is arranged along the circumferential direction of the edge of the cap (2), and the four positioning pin insertion holes (21) are arranged in sequence at the first, sixth, eleventh and sixteenth segments of the 16-equal circumference. The top two ends of the positioning pin (3) are clamped with pin lifting buckles (31).

2. The continuously adjustable manhole cover as described in claim 1, characterized in that: The top surface of the cap (2) is provided with a stepped countersunk hole, and the edge overlap of the inspection port movable cover plate (22) is supported on the stepped countersunk hole.

3. The continuously adjustable manhole cover as described in claim 1, characterized in that: The pin buckle (31) is a C-shaped steel wire piece.

4. The continuously adjustable manhole cover as described in claim 1, characterized in that: The lower end of the outer wall of the well base (1) is constructed with an integrally connected flange.

5. The continuously adjustable manhole cover as described in claim 1, characterized in that: The cap (2) is a thin-walled cylindrical shape.

6. The continuously adjustable manhole cover as described in claim 1, characterized in that: The cap's internal thread (23) is a multi-turn thread.

7. The continuously adjustable manhole cover as described in claim 1, characterized in that: The inner thread (23) of the cap begins at the bottom of the inner wall of the cap (2).

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