Drainage well lid for sponge city

Abstract

The invention relates to the field of well lids, in particular to a drainage well lid for a sponge city, which comprises a well lid body and a bottom cover arranged below the well lid body, the well lid body is provided with first drainage holes which are symmetrically distributed. At least one second drainage hole is formed in the well lid body, a third drainage hole is formed in the bottom of the bottom cover, the area of the third drainage hole is smaller than the total area of all the first drainage holes, the first drainage holes are located above the bottom cover, and at least two spring telescopic rods are connected between the well lid body and the bottom cover. At least one blocking structure is arranged outside the bottom cover, and the second drainage hole is located beside the upper portion of the bottom cover; the second drainage hole is formed in the side position above the bottom cover, large-flow drainage of the second drainage hole cannot impact the bottom cover, the problem that the spring telescopic rod is in an overload stretching state is avoided, and therefore the service life of the spring telescopic rod is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of manhole covers, and in particular to a drainage manhole cover for sponge cities. Background Art

[0002] The construction of sponge cities can reduce surface runoff, alleviate urban waterlogging, replenish groundwater, and repair the urban ecological environment. Therefore, the construction of sponge cities is of great significance to the future development of cities. The construction products of sponge cities include manhole covers for sponge cities.

[0003] For example, Chinese patent CN116356884A discloses a manhole cover with a rapid drainage function for municipal construction. The flow difference between the water leakage hole of the protective cover and the through hole of the rotating blade causes water to accumulate in the bottom shell. The weight of the accumulated water in the bottom shell drags the telescopic frame and the fixing member downward, causing the accumulated water to flow downward from the center of the protective cover, thereby increasing the drainage speed of the protective cover. However, the manhole cover has the following defects: 1. The added large-flow drainage channel is set above the bottom shell, resulting in a large flow of drainage that continuously impacts the bottom shell, causing the telescopic rod connecting the bottom shell and the protective cover to be continuously in an overloaded and stretched state, affecting the service life of the spring inside the telescopic rod.

[0004] 2. Under normal drainage conditions, small flow of drainage will also cause the telescopic rod to frequently extend and retract, causing the spring inside the telescopic rod to easily fatigue. Summary of the Invention

[0005] In order to overcome the shortcoming that the service life of parts is not considered when adding a drainage adjustment structure to the existing manhole cover, the present invention provides a sponge city drainage manhole cover.

[0006] Technical solution: A drainage manhole cover for sponge cities, comprising a manhole cover body and a bottom cover arranged below the manhole cover body; the manhole cover body is provided with symmetrically distributed drainage holes 1; the manhole cover body is provided with at least one drainage hole 2, and the bottom of the bottom cover is provided with drainage hole 3, the area of ​​the drainage hole 3 is smaller than the total area of ​​all the drainage holes 1, the lower side surface of the manhole cover body is initially in contact with the upper side surface of the bottom cover, the drainage hole 1 is located above the bottom cover, at least two spring telescopic rods are connected between the manhole cover body and the bottom cover, and at least one blocking structure is provided on the outside of the bottom cover, the blocking structure is used to block the drainage hole 2, and the drainage hole 2 is located on the side above the bottom cover; when the bottom cover is triggered to move downward, the blocking structure is driven to move downward synchronously, so that the drainage hole 2 is opened, and the water falling from the drainage hole 2 will not impact the bottom cover.

[0007] More preferably, the spring telescopic rod consists of a fixed rod, a lifting rod and a spring bead, the fixed rod and the lifting rod are connected by a spring, the spring bead is installed on the side wall of the lifting rod, and the side wall of the fixed rod is provided with a hole. When the spring bead is located in the hole of the fixed rod, the lifting rod is restricted.

[0008] More preferably, the drainage hole three is opened at the bottom of the side wall of the bottom cover.

[0009] More preferably, the blocking structure consists of a connecting rod and a blocking rod, the connecting rod is mounted on the side wall of the bottom cover, the blocking rod is mounted on the connecting rod, and the blocking rod is used to block the second drainage hole.

[0010] More preferably, the connecting rod is an elastic telescopic rod, the fixed end of the connecting rod is connected to the bottom cover, the telescopic end of the connecting rod is connected to the blocking rod, the blocking rod has a limiting structure, and a top rod is installed on the blocking rod adjacent to the drainage hole three, the top rod is opposite to the drainage hole three, and the diameter of the top rod is smaller than the diameter of the drainage hole three. When the blocking rod blocks the drainage hole two, the connecting rod is in a stretched state under the action of the limiting structure of the blocking rod. When the blocking rod leaves the drainage hole two, the limiting structure of the blocking rod loses its effect, and the connecting rod retracts, allowing the top rod to move with the blocking rod and be inserted into the drainage hole three.

[0011] More preferably, the end of the push rod facing the drainage hole 3 is in a pointed cone shape.

[0012] More preferably, the side of the drainage hole 2 close to the bottom cover is slope 1, the top of the blocking rod is composed of a plane and slope 2, and the slope 2 is the limiting structure of the blocking rod. When the blocking rod moves downward, the slope 2 of the blocking rod moves along the slope 1, allowing the connecting rod to gradually retract.

[0013] More preferably, after the connecting rod is retracted, the blocking rod contacts the edge of the bottom cover.

[0014] More preferably, the main body of the blocking rod is cylindrical.

[0015] More preferably, the bottom end of the blocking rod is in a pointed cone shape.

[0016] Compared with the prior art, the present invention has the following advantages: the present invention arranges the second drainage hole at a side position above the bottom cover, so that the large flow drainage of the second drainage hole will not impact the bottom cover, avoiding the problem of the spring telescopic rod being in an overloaded and stretched state, thereby extending the service life of the spring telescopic rod.

[0017] The present invention provides a spring bead so that the spring telescopic rod will change from a locked state to a freely telescopic state only when the weight of the accumulated water in the bottom cover reaches a specified threshold, thereby preventing the spring telescopic rod from being frequently telescoped and extended even when a small flow of water is drained in a normal drainage state, which may cause the spring inside the spring telescopic rod to be easily fatigued. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the sponge city drainage manhole cover of the present invention; Figure 2 Shown is a schematic diagram of the internal three-dimensional structure of the bottom cover of the present invention; Figure 3 Shown is a schematic diagram of the separation of the manhole cover body and the blocking rod of the present invention.

[0019] Among them, the above-mentioned drawings include the following figure marks: 1-manhole cover body, 11-drainage hole one, 12-drainage hole two, 13-slope one, 2-bottom cover, 21-drainage hole three, 3-spring telescopic rod, 31-spring bead, 4-connecting rod, 5-sealing rod, 51-plane, 52-slope two, 6-top rod. DETAILED DESCRIPTION

[0020] Although the present invention may be described with respect to a specific application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those skilled in the art will recognize that terms such as "above," "below," "upwardly," "downwardly," and the like are used to describe the drawings and are not intended to limit the scope of the present invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and are not intended to limit the scope of the present invention in any way.

[0021] Example 1: A sponge city drainage manhole cover, such as Figure 1-Figure 3 As shown, it includes a manhole cover body 1 and a bottom cover 2; the manhole cover body 1 is provided with symmetrically distributed drainage holes 11; the manhole cover body 1 is provided with at least one drainage hole 2 12, the diameter of the drainage hole 2 12 is larger than the diameter of the drainage hole 11, a bottom cover 2 is provided below the manhole cover body 1, a drainage hole 3 21 is provided at the bottom of the bottom cover 2, the area of ​​the drainage hole 3 21 is smaller than the total area of ​​all the drainage holes 11, the lower side surface of the manhole cover body 1 is initially in contact with the upper side surface of the bottom cover 2, the drainage hole 11 is located above the bottom cover 2, at least two spring telescopic rods 3 are connected between the manhole cover body 1 and the bottom cover 2, at least one blocking structure is provided on the outside of the bottom cover 2, and the drainage hole 2 12 is located on the side above the bottom cover 2.

[0022] The spring telescopic rod 3 consists of a fixed rod, a lifting rod and a spring bead 31. The fixed rod and the lifting rod are connected by a spring. The spring bead 31 is installed on the side wall of the lifting rod. The side wall of the fixed rod is provided with a hole. The telescopic principle of the spring bead 31 is consistent with the telescopic buckle principle of the umbrella handle.

[0023] The drainage hole 3 21 is opened at the bottom of the side wall of the bottom cover 2 .

[0024] In this embodiment, during normal drainage, the accumulated water above the manhole cover body 1 flows into the bottom cover 2 through the drainage hole 1 11 , and then is discharged downward from the drainage hole 3 21 of the bottom cover 2 .

[0025] When there is too much water accumulated above the manhole cover body 1, since the area of ​​the drainage hole three 21 is smaller than the total area of ​​all the drainage holes one 11, the drainage speed of the drainage hole three 21 is slower than the drainage speed of the drainage hole one 11, and the water accumulated in the bottom cover 2 gradually increases until the weight of the water accumulated in the bottom cover 2 reaches a specified threshold, forcing the spring ball 31 to contract, and the spring telescopic rod 3 to change from a locked state to a freely retractable state, and the spring telescopic rod 3 to stretch as the water accumulated in the bottom cover 2 increases, so that the bottom cover 2 moves downward, the bottom cover 2 is out of contact with the manhole cover body 1, the accumulated water in the bottom cover 2 will overflow, and the bottom cover 2 drives the blocking structure to move downward synchronously, so that the initially blocked drainage hole two 12 is opened to increase the drainage volume, and the drainage hole two 12 is set at a side position above the bottom cover 2, so that the large flow drainage of the drainage hole two 12 will not impact the bottom cover 2, avoiding the problem of the spring telescopic rod 3 being in an overloaded and stretched state, thereby extending the service life of the spring telescopic rod 3.

[0026] Furthermore, by providing the spring bead 31, the spring telescopic rod 3 will change from a locked state to a freely telescopic state only when the weight of the accumulated water in the bottom cover 2 reaches a specified threshold, thereby preventing the spring telescopic rod 3 from frequently telescoping and extending due to small-flow drainage in the normal drainage state, which would cause the spring inside the spring telescopic rod 3 to easily fatigue.

[0027] During subsequent resetting, the spring telescopic rod 3 retracts, allowing the spring ball 31 to pop out of the hole of the fixing rod of the spring telescopic rod 3 again, so that the spring telescopic rod 3 is locked again.

[0028] Furthermore, considering that if the drainage hole 3 21 is directly opened on the bottom wall of the bottom cover 2, impurities in the water flow will be deposited in the bottom cover 2 and will block the drainage hole 3 21, the drainage hole 3 21 is opened on the bottom of the side wall of the bottom cover 2 so that the impurities in the water flow will not easily be deposited in the bottom cover 2 and will block the drainage hole 3 21.

[0029] It should be noted that the number of the second drainage holes 12 and the blocking structures can be increased or decreased as needed. For example, in areas where severe water accumulation may occur, the number of the second drainage holes 12 and the blocking structures can be increased.

[0030] Example 2: Based on Example 1, Figure 1-Figure 3 As shown, the blocking structure is composed of a connecting rod 4 and a blocking rod 5 . The connecting rod 4 is installed on the side wall of the bottom cover 2 , and the blocking rod 5 is installed on the connecting rod 4 .

[0031] The connecting rod 4 is an elastic telescopic rod, the fixed end of the connecting rod 4 is connected to the bottom cover 2, and the telescopic end of the connecting rod 4 is connected to the blocking rod 5. The blocking rod 5 has a limiting structure, and a top rod 6 is installed on the blocking rod 5 adjacent to the drainage hole three 21. The top rod 6 is opposite to the drainage hole three 21, and the diameter of the top rod 6 is smaller than the diameter of the drainage hole three 21.

[0032] One end of the push rod 6 facing the drainage hole 3 21 is in a pointed cone shape, which improves the effect of removing blockage at the drainage hole 3 21 .

[0033] The side of the second drainage hole 12 close to the bottom cover 2 is a first slope 13 , and the top of the blocking rod 5 is composed of a plane 51 and a second slope 52 , and the second slope 52 is a limiting structure of the blocking rod 5 .

[0034] In this embodiment, when there is too much water accumulated above the manhole cover body 1, the water accumulated in the bottom cover 2 cannot be discharged in time and gradually increases. The bottom cover 2 will move downward, thereby driving the connecting rod 4 and the blocking rod 5 to move downward synchronously, allowing the blocking rod 5 to leave the drainage hole 2 12, thereby canceling the blockage of the drainage hole 2 12.

[0035] When the drain hole 3 21 is blocked, the accumulated water in the bottom cover 2 cannot be discharged and gradually accumulates, which will also cause the bottom cover 2 to move downward. Therefore, the structure of the inclined surface 13 and the inclined surface 2 52 is added. When the blocking rod 5 follows the bottom cover 2 to move downward, the inclined surface 2 52 of the blocking rod 5 moves along the inclined surface 13, allowing the connecting rod 4 as an elastic telescopic rod to gradually retract, so that the blocking rod 5 gradually moves toward the bottom cover 2, allowing the top rod 6 to follow the blocking rod 5 to move and insert into the drain hole 3 21, thereby clearing the drain hole 3 21. In this way, when the drain hole 3 21 is blocked, the movement of the blocking rod 5 and the top rod 6 can automatically clear the drain hole 3 21, avoiding the problem that the drain hole 2 12 is accidentally opened when there is not too much water above the manhole cover body 1, so that the present invention can achieve the effect of self-inspection and self-maintenance, and the overall electronic device is not used to achieve the effect of automatic triggering.

[0036] When the blocking rod 5 moves upward and resets, the second inclined surface 52 of the blocking rod 5 moves along the first inclined surface 13, so that the connecting rod 4 as an elastic telescopic rod is gradually stretched, and the blocking rod 5 blocks the second drainage hole 12 again.

[0037] Example 3: Based on Example 2, Figure 1-Figure 3 As shown, after the connecting rod 4 has been retracted, the blocking rod 5 is in contact with the edge of the bottom cover 2 .

[0038] The main body of the blocking rod 5 is cylindrical to reduce the resistance of the water flowing downward and ensure the rapid fall of the water.

[0039] The bottom end of the blocking rod 5 is in a pointed cone shape, so that the water flowing downward along the blocking rod 5 can quickly converge and fall.

[0040] In this embodiment, in the process of the blocking rod 5 following the downward movement of the bottom cover 2, under the retraction action of the connecting rod 4, the blocking rod 5 gradually moves toward the side close to the bottom cover 2. When the connecting rod 4 completes the retraction, the blocking rod 5 contacts the edge of the bottom cover 2. Since there is too much water accumulated above the manhole cover body 1, the accumulated water in the bottom cover 2 cannot be discharged from the drainage hole 3 21 in time, and can only overflow from the edge of the bottom cover 2. However, the surface tension of the accumulated water in the bottom cover 2 may hinder the rapid overflow of the water. At this time, the blocking rod 5 contacts the edge of the bottom cover 2, so that the blocking rod 5 acts as a drainage rod at the edge of the bottom cover 2, thereby concentrating the water flow, reducing the hindrance of surface tension, and more effectively diverting water downward, thereby accelerating the discharge of water accumulated at the bottom cover 2.

[0041] The above embodiments are provided to persons familiar with the art for implementing or using the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A drainage manhole cover for sponge city, comprising a manhole cover body (1) and a bottom cover (2) arranged below the manhole cover body (1); the manhole cover body (1) is provided with symmetrically distributed drainage holes (11); the manhole cover body (1) is provided with at least one drainage hole (12); the bottom of the bottom cover (2) is provided with a drainage hole (21); the area of ​​the drainage hole (21) is smaller than the total area of ​​all the drainage holes (11); the lower side surface of the manhole cover body (1) is initially in contact with the upper side surface of the bottom cover (2); the drainage hole (11) is located above the bottom cover (2); at least two spring telescopic rods (3) are connected between the manhole cover body (1) and the bottom cover (2); and the manhole cover body (1) and the bottom cover (2) are characterized in that: At least one blocking structure is provided on the outside of the bottom cover (2), and the blocking structure is used to block the second drainage hole (12), and the second drainage hole (12) is located on the side above the bottom cover (2); when the bottom cover (2) is triggered to move downward, the blocking structure is driven to move downward synchronously, so that the second drainage hole (12) is opened, and the water flow falling from the second drainage hole (12) will not impact the bottom cover (2).

2. A sponge city drainage manhole cover according to claim 1, characterized in that: The spring telescopic rod (3) is composed of a fixed rod, a lifting rod and a spring bead (31). The fixed rod and the lifting rod are connected by a spring. The spring bead (31) is installed on the side wall of the lifting rod. The side wall of the fixed rod is provided with a hole. When the spring bead (31) is located in the hole of the fixed rod, the lifting rod is restricted.

3. A sponge city drainage manhole cover according to claim 1, characterized in that: The third drainage hole (21) is opened at the bottom of the side wall of the bottom cover (2).

4. A sponge city drainage manhole cover according to claim 3, characterized in that: The blocking structure is composed of a connecting rod (4) and a blocking rod (5); the connecting rod (4) is mounted on the side wall of the bottom cover (2); the blocking rod (5) is mounted on the connecting rod (4); the blocking rod (5) is used to block the second drainage hole (12).

5. A sponge city drainage manhole cover according to claim 4, characterized in that: The connecting rod (4) is an elastic telescopic rod, the fixed end of the connecting rod (4) is connected to the bottom cover (2), and the telescopic end of the connecting rod (4) is connected to the blocking rod (5). The blocking rod (5) has a limiting structure. A top rod (6) is installed on the blocking rod (5) adjacent to the drainage hole three (21). The top rod (6) is opposite to the drainage hole three (21), and the diameter of the top rod (6) is smaller than the diameter of the drainage hole three (21). When the blocking rod (5) blocks the drainage hole two (12), the connecting rod (4) is in a stretched state under the action of the limiting structure of the blocking rod (5). When the blocking rod (5) leaves the drainage hole two (12), the limiting structure of the blocking rod (5) loses its effect, and the connecting rod (4) retracts, allowing the top rod (6) to move with the blocking rod (5) and be inserted into the drainage hole three (21).

6. A sponge city drainage manhole cover according to claim 5, characterized in that: One end of the push rod (6) facing the third drainage hole (21) is in a pointed cone shape.

7. A sponge city drainage manhole cover according to claim 5, characterized in that: The side of the second drainage hole (12) close to the bottom cover (2) is a sloped surface (13). The top of the blocking rod (5) is composed of a plane (51) and a second sloped surface (52). The second sloped surface (52) is a limiting structure of the blocking rod (5). When the blocking rod (5) moves downward, the second sloped surface (52) of the blocking rod (5) moves along the first sloped surface (13), allowing the connecting rod (4) to gradually retract.

8. A sponge city drainage manhole cover according to claim 7, characterized in that: After the connecting rod (4) has been retracted, the blocking rod (5) contacts the edge of the bottom cover (2).

9. A sponge city drainage manhole cover according to claim 8, characterized in that: The main body of the blocking rod (5) is cylindrical.

10. A sponge city drainage manhole cover according to claim 8, characterized in that: The bottom end of the blocking rod (5) is in a pointed cone shape.

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