Anti-backflow inspection well cover

Abstract

The utility model relates to an anti-backflow inspection well cover. The technical problem to be solved by the utility model is to provide the anti-backflow inspection well cover. According to the technical scheme, the inspection well cover comprises an inspection well cover base assembly and a face cover assembly, the inspection well cover base assembly comprises an inspection well cover base, an anti-backflow baffle and a pre-tightening spring, the inspection well cover base comprises a base main bearing part, and a base main surrounding edge is arranged on the front face of the base main bearing part; a base upper blocking edge is arranged on the inner wall of the base main surrounding edge, a base main drainage hole is formed in the center of the base main bearing part, and a base lower surrounding edge is arranged on the back face of the base main bearing part. The manhole cover has the advantages that the backflow prevention baffle can move up and down along with pressure change, dynamic opening and closing of the drainage hole of the manhole cover are achieved, the problems of sewage backflow and manhole cover displacement of the manhole cover in rainstorm or flood are effectively prevented, and flood prevention capacity, drainage efficiency and maintenance convenience are improved.

Description

Technical Field

[0001] This utility model relates to a manhole cover that prevents backflow. Background Technology

[0002] Manhole covers are facilities that cover the openings of underground pipeline inspection wells to protect the entrances of underground pipelines (such as sewers, electricity, communications, and gas), facilitating maintenance, cleaning, and troubleshooting by workers. Existing manhole covers are prone to backflow of sewage during extreme weather events such as heavy rain and floods, leading to cover displacement and even traffic disruption. Improvements and optimizations are needed to address this issue. Utility Model Content

[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a manhole cover that prevents backflow.

[0004] The technical solution adopted by this utility model of anti-backflow manhole cover is as follows: It includes a manhole cover base assembly and a face cover assembly. The manhole cover base assembly comprises a manhole cover base, an anti-backflow baffle, and a pre-tensioning spring. The manhole cover base includes a main support portion, a main perimeter on the front of the main support portion, an upper baffle on the inner wall of the main perimeter for limiting the position when the face cover assembly is closed, a main drainage hole at the center of the main support portion, a lower perimeter on the back of the main support portion, and spring support seats spaced around the main drainage hole at intervals on the bottom of the lower perimeter. The anti-backflow baffle includes a baffle body and a spring support provided on the manhole cover base. The baffle body has a baffle limiting edge that is connected to the main drainage hole of the base. The baffle limiting edge is provided with baffle water passage holes that communicate with the main drainage hole of the base at intervals around the arc. The lower edge of the base has a square structure, and the baffle body has a circular structure. A manhole cover drainage gap is formed between the lower edge of the base and the baffle body, which communicates with the baffle water passage holes. One end of the pre-tensioning spring abuts against the bottom of the baffle body and the other end abuts against the spring support seat. The anti-backflow baffle can move up and down between the main support part of the base and the spring support seat through the pre-tensioning spring.

[0005] The spring support seat has an internal cavity, and the top of the spring support seat has a positioning hole that communicates with the internal cavity and is used for positioning the pre-tension spring. The pre-tension spring is placed inside the spring support seat and its upper end passes through the positioning hole and abuts against the bottom of the baffle body.

[0006] The side of the spring support seat is provided with a spring inlet that communicates with the internal cavity of the support seat and facilitates the installation of the pre-tightening spring.

[0007] The number of spring support seats and preload springs is at least three.

[0008] The face cover assembly includes a face cover body and a face cover flipping drive block. A base flipping docking part is formed on the main periphery of the base. A base flipping limiting port is provided in the base flipping docking part. The face cover flipping drive block is rotatably set in the base flipping limiting port by bolts.

[0009] The advantages of this utility model of anti-backflow manhole cover are: the anti-backflow baffle can move up and down with the pressure changes, realizing the dynamic opening and closing of the manhole cover drainage hole, effectively preventing sewage backflow and manhole cover displacement during rainstorms or floods, and improving flood control capacity, drainage efficiency and maintenance convenience. Attached Figure Description

[0010] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0011] Figure 1 This is a schematic diagram of the structure of the anti-backflow manhole cover of this utility model;

[0012] Figure 2 This is a structural schematic diagram of the manhole cover base assembly of this utility model;

[0013] Figure 3 This is an exploded view of the manhole cover base assembly of this utility model;

[0014] Figure 4 This is a front structural diagram of the manhole cover base of this utility model;

[0015] Figure 5 This is a schematic diagram of the back structure of the manhole cover base of this utility model;

[0016] Figure 6 This is a schematic diagram of the anti-backflow baffle of this utility model;

[0017] Figure 7 This is a structural schematic diagram of the faceplate assembly of this utility model. Detailed Implementation

[0018] like Figure 1-7As shown, the anti-backflow manhole cover of this utility model includes a manhole cover base assembly 1 and a face cover assembly 2. The manhole cover base assembly 1 includes a manhole cover base 4, an anti-backflow baffle 5, and a pre-tensioning spring 6. The manhole cover base 4 includes a base main support part 7. The front of the base main support part 7 is provided with a base main perimeter 8. The inner wall of the base main perimeter 8 is provided with a base upper baffle 10 for limiting the position when the face cover assembly 2 is closed. The center of the base main support part 7 is provided with a base main drainage hole 11. The back of the base main support part 7 is provided with a base lower perimeter 12. The bottom of the base lower perimeter 12 is provided with spring support seats 13 spaced around the base main drainage hole 11. The anti-backflow baffle 5 includes a baffle body 16 and a baffle limiting perimeter 17 provided on the baffle body 16 and connected to the base main drainage hole 11. The baffle limits the... The lower perimeter 17 of the base is provided with baffle water passage holes 18 at intervals around the arc, which communicate with the main drainage hole 11 of the base. The lower perimeter 12 of the base has a square structure, and the baffle body 16 has a circular structure. A manhole cover drainage gap 14 communicating with the baffle water passage holes 18 is formed between the lower perimeter 12 of the base and the baffle body 16. One end of the pre-tension spring 6 abuts against the bottom of the baffle body 16 and the other end abuts against the spring support seat 13. The anti-backflow baffle 5 can move up and down between the main support part 7 of the base and the spring support seat 13 through the pre-tension spring 6. The anti-backflow baffle 5 can move up and down with the pressure change, realizing the dynamic opening and closing of the main drainage hole 11 of the base. This effectively prevents the manhole cover from backflowing sewage and shifting during rainstorms or floods, and improves flood control capacity, drainage efficiency and maintenance convenience.

[0019] The spring support 13 has an internal cavity 20. The top of the spring support 13 has a support positioning hole 21 that communicates with the internal cavity 20 and is used for positioning the pre-tension spring 6. The pre-tension spring 6 is placed inside the spring support 13 and its upper end passes through the support positioning hole 21 and abuts against the bottom of the baffle body 16. The spring positioning structure prevents displacement, distributes force evenly, and extends the spring life.

[0020] The side of the spring support 13 is provided with a spring inlet 22 that communicates with the inner cavity 20 of the support and facilitates the installation of the pre-tightening spring 6, supporting quick replacement of damaged springs and reducing maintenance costs.

[0021] The number of the spring support 13 and the pre-tension spring 6 is at least 3, so that the anti-backflow baffle 5 is subjected to balanced force and moves smoothly and reliably without tilting.

[0022] The face cover assembly 2 includes a face cover body 24 and a face cover flipping drive block 25. A base flipping docking part 26 is formed on the main periphery 8 of the base. A base flipping limiting port 27 is provided in the base flipping docking part 26. The face cover flipping drive block 25 is rotatably set in the base flipping limiting port 27 by bolts to avoid the face cover from accidentally falling off due to backflow and other problems, and to improve the connection firmness.

[0023] Under normal operating conditions, the anti-backflow baffle 5 is placed on the pre-tensioned spring 6. Under the action of external water pressure, the anti-backflow baffle 5 moves downward, forming a gap between the anti-backflow baffle 5 and the main support part 7 of the base. Water flows into the manhole cover through the upper end face of the main support part 7 of the base, the main drainage hole 11 of the base, the water passage hole 18 of the baffle limiting edge 17, and the drainage gap 14 of the manhole cover. When there are factors such as heavy rain or floods, the water inside the manhole cover becomes too much, resulting in increased internal pressure. Under the action of internal water pressure, the anti-backflow baffle 5 moves upward, so that the baffle body 16 is tightly attached to the lower end face of the main support part 7 of the base, and water cannot flow out of the manhole cover from the inside, thus realizing the backflow of the manhole cover.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.

Claims

1. A manhole cover for preventing backflow, comprising a manhole cover base assembly (1) and a face cover assembly (2), characterized in that: The manhole cover base assembly (1) includes a manhole cover base (4), an anti-backflow baffle (5), and a pre-tensioning spring (6). The manhole cover base (4) includes a base main support part (7). The front of the base main support part (7) is provided with a base main perimeter (8). The inner wall of the base main perimeter (8) is provided with a base upper baffle (10) for limiting the position when the cover assembly (2) is covered. The center of the base main support part (7) is provided with a base main drainage hole (11). The back of the base main support part (7) is provided with a base lower perimeter (12). The bottom of the base lower perimeter (12) is provided with spring support seats (13) spaced around the base main drainage hole (11). The anti-backflow baffle (5) includes a baffle body (16) and a spring support seat (6) provided on the baffle body (16) and connected to the manhole cover base. The base has a baffle limiting edge (17) that is connected to the main drainage hole (11) of the base. The baffle limiting edge (17) is provided with baffle water passage holes (18) that communicate with the main drainage hole (11) of the base around an arc. The lower edge (12) of the base is square and the baffle body (16) is circular. A manhole cover drainage gap (14) that communicates with the baffle water passage holes (18) is formed between the lower edge (12) of the base and the baffle body (16). One end of the pre-tightening spring (6) abuts against the bottom of the baffle body (16) and the other end abuts against the spring support seat (13). The anti-backflow baffle (5) can move up and down between the main support part (7) of the base and the spring support seat (13) through the pre-tightening spring (6).

2. The anti-backflow manhole cover according to claim 1, characterized in that: The spring support (13) has a support cavity (20) inside. The top of the spring support (13) has a support positioning hole (21) that communicates with the support cavity (20) and is used for positioning the pre-tension spring (6). The pre-tension spring (6) is placed inside the spring support (13) and its upper end passes through the support positioning hole (21) and abuts against the bottom of the baffle body (16).

3. The anti-backflow manhole cover according to claim 2, characterized in that: The side of the spring support (13) is provided with a spring inlet (22) that communicates with the inner cavity (20) of the support and facilitates the installation of the pre-tightening spring (6).

4. The anti-backflow manhole cover according to claim 1, characterized in that: The number of the spring support (13) and the preload spring (6) is at least three.

5. The anti-backflow manhole cover according to claim 1, characterized in that: The face cover assembly (2) includes a face cover body (24) and a face cover flipping drive block (25). A base flipping docking part (26) is formed on the main perimeter (8) of the base. A base flipping limiting port (27) is provided in the base flipping docking part (26). The face cover flipping drive block (25) is flipped in the base flipping limiting port (27) by bolts.

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