Manhole cover

Abstract

The utility model provides a sewer well lid which comprises a well base, an inner supporting frame is inwards arranged on the edge of the lower end of the well base, a supporting cover is movably arranged in the well base, a vertical frame is downwards arranged on the edge of the supporting cover, and a plurality of strip-shaped staggered holes which are distributed at equal intervals are formed in the supporting cover in a penetrating mode. A hollow sinking drainage shell is movably arranged below the supporting cover in the well seat, an upper supporting frame is outwards arranged on the edge of the upper end of the sinking drainage shell, and an elastic piece is arranged at the lower end of the upper supporting frame; a first-level drainage strip is arranged at the position, at each strip-shaped dislocation hole, of the upper end of the sinking drainage shell, each first-level drainage strip is downwards provided with a water leakage hole, a second-level drainage strip hole is formed in the position, between every two first-level drainage strips, of the sinking drainage shell, a strip-shaped drainage hole is formed in the lower end of the sinking drainage shell, and a plurality of overflow openings are formed in the side wall of the sinking drainage shell. The drainage capacity can be adjusted in a self-adaptive mode according to the rainfall, the enough drainage capacity is ensured, and meanwhile garbage on the road surface can be effectively prevented from entering.

Description

Technical Field

[0001] The utility model belongs to the technical field of road drainage equipment and relates to a manhole cover. Background Art

[0002] With the accelerated development of urbanization, the importance of urban infrastructure construction has become increasingly prominent. Among the many infrastructures, the drainage system under municipal roads is a key component to ensure the safe operation of the city, and its importance cannot be ignored. Manhole covers, as important components connecting surface and underground drainage pipes, play a vital role in the urban drainage system. They not only need to have sufficient strength and stability to withstand the pressure of passing vehicles and pedestrians, but also ensure good drainage performance to prevent urban waterlogging caused by rainwater accumulation. Traditional manhole covers are mostly made of metal materials such as cast iron or steel, which have high compressive strength and corrosion resistance.

[0003] Existing manhole cover designs typically feature a certain number and size of drainage holes at the top to ensure that surface water can flow smoothly into the underground drainage system. However, this design has a significant drawback: to ensure sufficient drainage capacity, the drainage holes are often designed to be large. While this effectively prevents rainwater from accumulating, it inevitably allows a large amount of road debris to enter the sewer through these larger drainage holes. Over time, this debris not only clogs the sewer, making it more difficult to clean, but also places an additional burden on the city's sewage treatment system, affecting the city's environmental sanitation and the quality of life of residents. Utility Model Content

[0004] The purpose of the utility model is to provide a manhole cover that can automatically adjust the drainage capacity according to the rainfall, and can effectively prevent road garbage from entering while ensuring sufficient drainage capacity.

[0005] In order to solve the above technical problems, the utility model provides a manhole cover, including a manhole seat, an inner support frame is provided inwardly at the edge of the lower end of the manhole seat, a support cover is movably provided in the manhole seat, and a vertical frame is provided downwardly at the edge of the support cover that matches the inner wall of the manhole seat. After installation, the support cover is flush with the upper surface of the manhole seat, and a plurality of strip-shaped staggered holes distributed at equal intervals are provided through the support cover. A hollow sinking drainage shell is movably provided in the manhole seat below the support cover, and the side walls of the sinking drainage shell are in contact with and slidably connected to the inner wall of the inner support frame. An upper support frame is provided outwardly at the edge of the upper end of the sinking drainage shell and is located below the support cover, and an elastic member is provided at the lower end of the upper support frame that can prop it up to contact the support cover.

[0006] The upper end of the sinking drainage shell is provided with a first-level drainage strip at each strip-shaped offset hole, and each first-level drainage strip is downwardly provided with a leakage hole connected to the sinking drainage shell. The sinking drainage shell is provided with a second-level drainage strip hole connected to the interior thereof between every two first-level drainage strips. When not affected by external force, each second-level drainage strip hole is blocked by the support cover. The lower end of the sinking drainage shell is provided with a strip-shaped drainage hole connected to the interior thereof, and the side wall of the sinking drainage shell is provided with multiple overflow ports connected to the interior thereof. When the water in the sinking drainage shell is discharged from the overflow port, the sinking drainage shell compresses the elastic part to open the second-level drainage strip hole.

[0007] By adopting the above technical solution, when the rainfall is light, the first-level drainage strip is located in the strip-shaped offset hole, blocking the second-level drainage strip hole. After the rainwater flows from the road surface to the support cover, it flows into the sunken drainage shell through the leakage hole on the first-level drainage strip and is discharged into the sewer through the strip-shaped drainage hole.

[0008] When the rainfall increases, the water inflow of the leakage hole is greater than the drainage volume of the strip drainage hole, and the water at the bottom of the sinking drainage shell gradually increases, gradually increasing the downward pressure on the support spring until the support spring is compressed to cause the sinking drainage shell to move downward and leak out of the secondary drainage strip hole. Rainwater flows into the sinking drainage shell from the leakage hole and the secondary drainage strip hole at the same time, and is discharged into the sewer from the strip drainage hole and the overflow outlet.

[0009] The present invention is further configured such that a lower support frame is provided inwardly at the lower end of the vertical frame and is in contact with the inner support frame, and the elastic member is provided between the upper support frame and the lower support frame.

[0010] The utility model is further configured such that both the vertical frame and the lower support frame are U-shaped.

[0011] The utility model is further configured such that the elastic member is a support spring.

[0012] The present invention is further configured such that an outer support frame is provided outwardly at the edge of the lower end of the well seat.

[0013] The present invention is further configured such that at least two cover-lifting holes arranged opposite to each other are provided through the edge of the support cover, and at least two insertion holes corresponding to the cover-lifting holes are provided through the upper support frame.

[0014] The present invention is further configured such that each first-level drainage strip protrudes upward and is flush with the upper surface of the support cover.

[0015] The utility model is further configured such that the lower cross-section of the sinking drainage shell is V-shaped.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model utilizes a sinking drainage shell that can adaptively sink. When the rainfall is small, the sinking drainage shell does not sink to block the secondary drainage strip holes, and only uses the leakage holes to drain water, which can not only play a sufficient drainage role, but also prevent road garbage from entering. When the rainfall is heavy, the water volume in the sinking drainage shell increases, causing it to sink and open the secondary drainage strip holes, so that the leakage holes and the secondary drainage strip holes drain water at the same time to meet the demand for large drainage volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is an exploded view of the utility model;

[0019] Figure 3 yes Figure 2 A magnified view of middle A;

[0020] Figure 4 Used to show the strip drain hole at the bottom of the sunken drainage shell.

[0021] Among them, 1. Well seat; 2. Outer support frame; 3. Inner support frame; 4. Support cover; 5. Vertical frame; 6. Lower support frame; 7. Strip-shaped offset hole; 8. Sinking drainage shell; 9. Upper support frame; 10. Support spring; 11. Lifting hole; 12. Plug hole; 13. First-level drainage strip; 14. Leakage hole; 15. Second-level drainage strip hole; 16. Strip-shaped drain hole; 17. Overflow port. DETAILED DESCRIPTION

[0022] The following is a detailed description of the manhole cover proposed by the present invention, with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention. Identical or similar reference numerals in the drawings represent identical or similar components.

[0023] Example, see Figure 1-4 A manhole cover includes a rectangular manhole seat 1, an outer support frame 2 is provided outwardly at the edge of the lower end of the manhole seat 1, an inner support frame 3 is provided inwardly at the edge of the lower end of the manhole seat 1, a support cover 4 is movably provided in the manhole seat 1, and a vertical frame 5 is provided downwardly at the edge of the support cover 4 to cooperate with the inner wall of the manhole seat 1, and a lower support frame 6 is provided inwardly at the lower end of the vertical frame 5 to cooperate with the inner support frame 3. Both the vertical frame 5 and the lower support frame 6 are U-shaped for easy installation. After installation, the support cover 4 is flush with the upper surface of the manhole seat 1, and a plurality of strip-shaped staggered holes 7 distributed at equal intervals are opened through the support cover 4.

[0024] The hollow sunken drainage shell 8 is movably arranged in the well seat 1 below the supporting cover 4, the lower section of the sunken drainage shell 8 is V-shaped, the side wall of the sunken drainage shell 8 is in contact with and slidably connected to the inner wall of the inner supporting frame 3, the edge of the upper end of the sunken drainage shell 8 is outwardly provided with a ring of upper supporting frames 9 below the supporting cover 4, a plurality of supporting springs 10 are arranged between the upper supporting frames 9 and the lower supporting frames 6 as elastic members, the supporting springs 10 can be upwardly supported to be in contact with the supporting cover 4. Two oppositely arranged cover lifting holes 11 are formed through the edge of the supporting cover 4, two insertion holes 12 corresponding to the cover lifting holes 11 are formed through the upper supporting frames 9, the cover lifting holes 11 and the insertion holes 12 are at least two, a knocking rod is inserted into the two cover lifting holes 11 and the insertion holes 12, the supporting cover 4 is taken out from the well seat 1 together with the sunken drainage shell 8.

[0025] The upper end of the sunken drainage shell 8 is upwardly protruded at each of the strip-shaped staggered holes 7 to form a first-level drainage strip 13 flush with the upper surface of the supporting cover 4, each of the first-level drainage strips 13 is downwardly provided with a water leakage hole 14 in communication with the sunken drainage shell 8, the water leakage hole 14 has a small diameter, which can ensure sufficient drainage when the rainfall is small and prevent road garbage from entering, the sunken drainage shell 8 is provided with a second-level drainage strip hole 15 between each two first-level drainage strips 13, which is internally communicated, each of the second-level drainage strip holes 15 is blocked by the supporting cover 4 when not subjected to external force, the lower end of the sunken drainage shell 8 is provided with a strip-shaped downcomer hole 16 in communication with the inside thereof, the front and rear side walls of the sunken drainage shell 8 are provided with a water overflow port 17 in communication with the inside thereof, when the water in the sunken drainage shell 8 is discharged from the water overflow port 17, the sunken drainage shell 8 compresses the elastic member to open the second-level drainage strip hole 15.

[0026] Working principle: when the rainfall is small, the first-level drainage strips 13 are located in the strip-shaped staggered holes 7 to block the second-level drainage strip holes 15, after the rainwater flows from the road surface to the supporting cover 4, the rainwater flows into the sunken drainage shell 8 through the water leakage holes 14 on the first-level drainage strips 13 and is discharged into the sewer through the strip-shaped downcomer hole 16;

[0027] When the rainfall increases, the water inflow of the water leakage hole 14 is greater than the water discharge of the strip-shaped downcomer hole 16, the water at the bottom of the sunken drainage shell 8 gradually increases, gradually increasing the downward pressure on the supporting spring 10, until the supporting spring 10 is compressed to move the sunken drainage shell 8 downward to leak out of the second-level drainage strip hole 15, the rainwater flows into the sunken drainage shell 8 from the water leakage hole 14 and the second-level drainage strip hole 15, and is discharged into the sewer from the strip-shaped downcomer hole 16 and the water overflow port 17.

[0028] It should be noted that the embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other.

[0029] The above description is only the description of the preferred embodiment of the utility model, and does not limit the utility model in any way, and any change and modification of the utility model made by the ordinary skilled in the art according to the above disclosure are within the protection scope of the claims.

Claims

1. A manhole cover, comprising a manhole seat (1), wherein an inner support frame (3) is provided inwardly at the edge of the lower end of the manhole seat (1), characterized in that: A support cover (4) is movably provided in the well seat (1), and a vertical frame (5) is provided downwardly on the edge of the support cover (4) and matches the inner wall of the well seat (1). After installation, the support cover (4) is flush with the upper surface of the well seat (1), and a plurality of strip-shaped dislocation holes (7) distributed at equal intervals are provided through the support cover (4). A hollow sinking drainage shell (8) is movably provided below the support cover (4) in the well seat (1), and the side wall of the sinking drainage shell (8) contacts and is slidably connected to the inner wall of the inner support frame (3). An upper support frame (9) located below the support cover (4) is provided outwardly on the edge of the upper end of the sinking drainage shell (8), and the lower end of the upper support frame (9) is provided with an elastic member capable of propping it up to contact the support cover (4); The upper end of the sinking drainage shell (8) is provided with a first-level drainage strip (13) at each strip-shaped offset hole (7), and each first-level drainage strip (13) is provided with a leakage hole (14) connected to the sinking drainage shell (8) downwardly. The sinking drainage shell (8) is provided with a second-level drainage strip hole (15) connected to the interior thereof between every two first-level drainage strips (13). When not subjected to external force, each second-level drainage strip hole (15) is blocked by the support cover (4). The lower end of the sinking drainage shell (8) is provided with a strip-shaped drainage hole (16) connected to the interior thereof. The side wall of the sinking drainage shell (8) is provided with a plurality of overflow ports (17) connected to the interior thereof. When water in the sinking drainage shell (8) is discharged from the overflow port (17), the sinking drainage shell (8) compresses the elastic member to open the second-level drainage strip hole (15).

2. A manhole cover according to claim 1, characterized in that: A lower support frame (6) is provided inwardly at the lower end of the vertical frame (5) and is in contact with the inner support frame (3). The elastic member is provided between the upper support frame (9) and the lower support frame (6).

3. A manhole cover according to claim 2, characterized in that: The vertical frame (5) and the lower support frame (6) are both U-shaped.

4. A manhole cover according to claim 1, characterized in that: The elastic member is a supporting spring (10).

5. A manhole cover according to claim 1, characterized in that: An outer support frame (2) is provided outwardly at the edge of the lower end of the well seat (1).

6. A manhole cover according to claim 1, characterized in that: At least two cover-lifting holes (11) arranged opposite to each other are provided through the edge of the support cover (4), and at least two insertion holes (12) corresponding to the cover-lifting holes (11) are provided through the upper support frame (9).

7. A manhole cover according to claim 1, characterized in that: Each level of drainage strip (13) protrudes upwards and is flush with the upper surface of the support cover (4).

8. The manhole cover according to claim 1, characterized in that: The lower cross-section of the sinking drainage shell (8) is V-shaped.

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