Rainwater inspection well for treating mixed rainwater and sewage

Abstract

The utility model belongs to the technical field of municipal drainage, and particularly relates to a rainwater inspection well for treating mixed rainwater and sewage, which comprises an inspection well, a rainwater pipe and a sewage pipe are communicated in the inspection well, the rainwater pipe is higher than the sewage pipe, the top of water in the inspection well is arranged to be a water surface, and the sewage pipe is arranged in the inspection well. A vertical ladder stand is fixedly installed on the inner wall of the inspection well, a valve is arranged at the communication position of the sewage pipe and the inspection well, a floating ball valve is arranged between the water surface and the bottom of the vertical ladder stand and between the water surface and the valve, and the floating ball valve and the valve are installed. The inspection well is simple in structure and convenient to install, initial rainwater and later rainwater with certain pollution can be respectively discharged into the sewage pipe and the rainwater pipe through the arrangement of the floating ball valve, the problems of low sewage interception concentration of the sewage pipe, poor water quality of the rainwater pipe, unsmooth drainage and the like caused by mixed connection of the rainwater and the sewage can be effectively solved, and therefore the inspection well is convenient to use and high in practicability. And the use effect is good.

Description

Technical Field

[0001] This utility model relates to the field of municipal drainage technology, specifically a rainwater inspection well for treating the mixing of rainwater and sewage. Background Technology

[0002] Currently, although urban living environments and municipal infrastructure are relatively mature, the protection of urban water environments still faces many challenges. Studies indicate that while cities in the middle and lower reaches of the Yangtze River have made significant progress in sewage network coverage and treatment, with coverage and treatment rates both exceeding 90%, these cities still suffer from recurring river pollution problems during rainy days. One key issue is the mixed inflow of rainwater and sewage into drainage systems. This not only reduces the effective transport capacity of sewage networks but also results in sewage treatment plants receiving lower sewage concentrations, larger treatment volumes, and extremely low treatment efficiency.

[0003] In some cases, rainwater pipes are mistakenly connected to sewage pipe networks, leading to a surge in influent to sewage treatment plants during rainy days, and potentially causing overflows and excessive discharges during heavy rains. According to relevant research, the average proportion of combined rainwater and sewage connections in the drainage networks of cities in the middle and lower reaches of the Yangtze River is approximately 26%, while in some areas this proportion can reach as high as 70%. Designing a rainwater inspection well that can effectively separate rainwater and sewage to address this issue has become a pressing technical challenge. Therefore, this paper proposes a rainwater inspection well for handling combined rainwater and sewage connections. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and solve the problems that existing rainwater inspection wells cannot effectively separate rainwater and sewage, thus making it difficult to reduce the mixing of rainwater and sewage in urban drainage, reduce the treatment pressure of sewage treatment plants, and make sewage discharge more environmentally friendly, this utility model proposes a rainwater inspection well for treating the mixing of rainwater and sewage.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a rainwater inspection well for treating the mixing of rainwater and sewage, as described in this utility model, including an inspection well;

[0006] The inspection well is connected to a rainwater pipe and a sewage pipe. The rainwater pipe is installed at a higher height than the sewage pipe. The top of the water inside the inspection well is set as the water surface.

[0007] A vertical ladder is fixedly installed on the inner wall of the inspection well. A valve is provided at the connection between the sewage pipe and the inspection well. A float valve is installed between the water surface and the valve.

[0008] Preferably, the float valve includes a hinge point fixedly installed inside the inspection well, the hinge point being rotatably connected to the inspection well, a float ball being disposed on the water surface, a first flexible connector being fixedly installed between the float ball and the hinge point, and a second flexible connector being fixedly installed between the hinge point and the valve. The length ratio of the first flexible connector and the second flexible connector on both sides of the hinge point changes with the movement of the float ball and the valve.

[0009] Preferably, the valve includes a limiting slide rail located at the connection between the sewage pipe and the inspection well, a door leaf is slidably connected inside the limiting slide rail, a valve connecting lug is fixedly connected to one side of the door leaf, and the valve connecting lug is rotatably connected to one end of the second flexible connector.

[0010] Preferably, the door leaf moves downward along the limiting slide rail under its own weight, and the door leaf moves upward along the limiting slide rail under the pulling force of the float through the second flexible connector and the hinge point.

[0011] Preferably, the float weighs more than the valve, and the float always floats on the water surface inside the inspection well.

[0012] Preferably, the hinge point is positioned at a height lower than that of the rainwater pipe and higher than that of the sewage pipe.

[0013] Preferably, the manhole is provided with a flip-top cover that can be opened and closed by flipping.

[0014] The advantages of this utility model are:

[0015] This utility model has a simple structure and is easy to install. With the addition of a float valve, it can discharge the initial rainwater and the later rainwater, which have certain pollutants, into the sewage pipe and the rainwater pipe respectively. This can effectively solve the problems caused by the mixing of rainwater and sewage, such as low sewage interception concentration in the sewage pipe, poor water quality in the rainwater pipe, and poor drainage. As a result, the inspection well is convenient to use and has a good effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the inspection well when the water level is low, as shown in Example 1.

[0018] Figure 2 This is a schematic diagram of the valve structure of the inspection well in Example 1;

[0019] Figure 3 This is a schematic diagram of the structure when the water level in the inspection well is high, as shown in Example 1.

[0020] In the diagram: 1. Inspection well; 2. Tilting manhole cover; 3. Rainwater pipe; 4. Sewage pipe; 5. Vertical ladder; 6. Float valve; 61. Float; 62. First flexible connector; 63. Second flexible connector; 64. Hinge point; 65. Valve connecting lug; 7. Valve; 71. Limiting slide rail; 72. Door leaf; 8. Water surface. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figure 1-3 As shown, a rainwater inspection well for treating the mixing of rainwater and sewage includes an inspection well 1;

[0024] The inspection well 1 is connected to a rainwater pipe 3 and a sewage pipe 4. The rainwater pipe 3 is installed at a higher height than the sewage pipe 4. The top of the water inside the inspection well 1 is set as a water surface 8.

[0025] A vertical ladder 5 is fixedly installed on the inner wall of the inspection well 1. A valve 7 is provided at the connection between the sewage pipe 4 and the inspection well 1. A float valve 6 is installed between the water surface 8 and the valve 7. During operation, when the rainfall is heavy, the rainwater flow in the inspection well 1 is large and the water level in the well is high. Then the water surface 8 rises and drives the float valve 6 to work. At this time, the valve 7 sinks down and closes, thus closing the sewage pipe 4, so that rainwater will not enter the sewage pipe 4. The rainwater accumulated in the inspection well 1 will be discharged through the rainwater pipe 3. At this time, the rainwater will not mix with the sewage, reducing the pressure on sewage treatment and improving the quality and efficiency of sewage treatment. When the rainfall decreases and the rainwater accumulation in the inspection well 1 decreases, the water surface 8 will begin to drop below the height of the rainwater pipe 3. The float valve 6 will work again, causing the valve 7 to rise again, opening the sewage pipe 4 and restoring the normal working mode of municipal drainage. At the same time, a vertical ladder 5 is provided inside the rainwater inspection well 1 to facilitate maintenance personnel to enter the rainwater inspection well 1 for cleaning and maintenance.

[0026] The float valve 6 includes a hinge point 64 fixedly installed inside the inspection well 1. The hinge point 64 is rotatably connected to the inspection well 1. A float 61 is provided on the water surface 8. A first flexible connector 62 is fixedly installed between the float 61 and the hinge point 64. A second flexible connector 63 is fixedly installed between the hinge point 64 and the valve 7. The length ratio of the first flexible connector 62 and the second flexible connector 63 on both sides of the hinge point 64 changes with the movement of the float 61 and the valve 7. During operation, the movement of the float 61 drives the first flexible connector 62 and the second flexible connector 63 to rotate through the hinge point 64. The rotation of the second flexible connector 63, combined with its own extension and retraction, drives the valve 7 to open and close. At the same time, the first flexible connector 62 and the second flexible connector 63 can extend and retract when subjected to external force to adapt to the needs during the rotation process.

[0027] The valve 7 includes a limiting slide rail 71 located at the connection between the sewage pipe 4 and the inspection well 1. A door leaf 72 is slidably connected inside the limiting slide rail 71. A valve connecting ear 65 is fixedly connected to one side of the door leaf 72. The valve connecting ear 65 is rotatably connected to one end of the second flexible connector 63. During operation, the door leaf 72 can slide up and down inside the limiting slide rail 71 through the action of the second flexible connector 63 to open or close the sewage pipe 4.

[0028] The door leaf 72 moves downward along the limiting slide rail 71 under its own weight. The door leaf 72 moves upward along the limiting slide rail 71 under the pulling force of the float ball 61 through the second flexible connector 63 and the hinge point 64. During operation, the door leaf 72 can move downward along the slide rail 71 under its own weight until it reaches the limit position of the slide rail 71. At this time, the door leaf 72 achieves a larger blocking area on the opening of the sewage pipe 4, which realizes the closure of the sewage pipe 4 by the valve 7.

[0029] The float 61 is heavier than the valve 7, and it always floats on the water surface 8 inside the inspection well 1. During operation, since the float 61 is heavier than the valve leaf 72 of the valve 7, the second flexible connector 63 becomes shorter and the float 61 gradually moves downward. An upward pulling force is generated on the second flexible connector 63. This upward pulling force drives the valve leaf 72 to slide upward along the slide rail 71, which reduces the area of ​​the valve leaf 72 blocking the opening of the sewage pipe 4, thus enabling the valve 7 to open the sewage pipe 4. At the same time, the float 61 always floats on the water surface 8 inside the inspection well 1, which facilitates the water to provide buoyancy to the float 61.

[0030] The hinge point 64 is set at a height lower than that of the rainwater pipe 3 and higher than that of the sewage pipe 4; this facilitates the operation of the float valve 6 during operation.

[0031] Example 2

[0032] Please see Figure 1 As shown in the first embodiment, as another implementation of this utility model, the manhole of the inspection well 1 is provided with a flip-top manhole cover 2 that can be opened and closed by flipping. During operation, flipping the manhole cover 2 facilitates the opening and closing of the inspection well 1, and the inspection well 1 is normally in a closed state, and can be opened when maintenance is required.

[0033] Working principle: When the water level 8 rises, buoyancy lifts the float 61 upwards. At this time, the straight distance between the float 61 and the hinge point 64 gradually decreases. According to the lever principle, the hinge point 64 is regarded as a fulcrum, the first flexible connector 62 is the first lever arm, and the second flexible connector 63 is the second lever arm. As the straight distance between the float 61 and the hinge point 64 gradually decreases, the first lever arm gradually decreases. The force on the first flexible connector 62 is only the weight of the float 61, the buoyancy of the float 61, and the tension of the second flexible connector 63. The weight of the float 61 and the buoyancy of the float 61 remain unchanged. The first lever arm decreases, so the first torque on the first flexible connector 62 also decreases, and the reverse tension acting on the second flexible connector 63 also decreases. At this time, the door leaf 72 can move downwards along the slide rail 71 under its own weight until it reaches the limit of the slide rail 71. At this time, the door leaf 72 achieves a larger blocking area for the sewage pipe 4 opening, thus achieving the closure of the sewage pipe 4 by the valve 7.

[0034] When the water level 8 drops, the float 61 floating on the water level 8 moves downward. The first flexible connector 62 connected to the float 61 is subjected to a downward pulling force. Under the action of the pulling force, the first flexible connector 62 becomes longer and the second flexible connector 63 becomes shorter. Since the weight of the float 61 is greater than that of the valve leaf 72 of the valve 7, the second flexible connector 63 becomes shorter and the float 61 also gradually moves downward. An upward pulling force is generated on the second flexible connector 63. This upward pulling force drives the valve leaf 72 to slide upward along the slide rail 71, so that the area of ​​the valve leaf 72 blocking the opening of the sewage pipe 4 becomes smaller, which means that the valve 7 opens the sewage pipe 4.

[0035] When rainfall is low, the flow of rainwater in inspection well 1 is small, the water level in the well is low, and the float ball 61 is in a low position. At this time, valve 7 is raised to open sewage pipe 4. Only a small amount of rainwater enters sewage pipe 4 and mixes with sewage, which will not have a significant burden or impact on sewage treatment.

[0036] When there is heavy rainfall, the flow of rainwater in inspection well 1 is large, the water level in the well is high, and the float ball 61 is in a high position. At this time, the valve 7 sinks down and closes to close the sewage pipe 4, so that rainwater will not enter the sewage pipe 4. The rainwater accumulated in inspection well 1 will be discharged through rainwater pipe 3. At this time, the rainwater will not mix with the sewage, reducing the pressure of sewage treatment and improving the quality and efficiency of sewage treatment.

[0037] As the rain subsides and the water level in manhole 1 decreases, the water level 8 begins to drop below the height of the rainwater pipe 3. The float ball 61 then pulls the first flexible connector 62 and the second flexible connector 63 again, causing the valve 7 to rise again, opening the sewage pipe 4 and restoring the normal working mode of municipal drainage.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A rainwater inspection well for treating the mixing of rainwater and sewage, comprising an inspection well (1); Its features are: The inspection well (1) is connected to a rainwater pipe (3) and a sewage pipe (4). The rainwater pipe (3) is installed at a higher height than the sewage pipe (4). The top of the water inside the inspection well (1) is set as the water surface (8). A vertical ladder (5) is fixedly installed on the inner wall of the inspection well (1). A valve (7) is provided at the connection between the sewage pipe (4) and the inspection well (1). A float valve (6) is provided between the water surface (8) and the valve (7). The float valve (6) is installed with the valve (7).

2. A rainwater inspection well for treating mixed rainwater and sewage as described in claim 1, characterized in that: The float valve (6) includes a hinge point (64) fixedly installed inside the inspection well (1), the hinge point (64) being rotatably connected to the inspection well (1), a float (61) being provided on the water surface (8), a first flexible connector (62) being fixedly installed between the float (61) and the hinge point (64), and a second flexible connector (63) being fixedly installed between the hinge point (64) and the valve (7). The length ratio of the first flexible connector (62) and the second flexible connector (63) on both sides of the hinge point (64) changes with the movement of the float (61) and the valve (7).

3. A rainwater inspection well for treating mixed rainwater and sewage as described in claim 2, characterized in that: The valve (7) includes a limiting slide rail (71) opened at the connection between the sewage pipe (4) and the inspection well (1). A door leaf (72) is slidably connected inside the limiting slide rail (71). A valve connecting ear (65) is fixedly connected to one side of the door leaf (72). The valve connecting ear (65) is rotatably connected to one end of the second flexible connector (63).

4. A rainwater inspection well for treating mixed rainwater and sewage as described in claim 3, characterized in that: The door leaf (72) moves downward along the limiting slide rail (71) under its own weight, and the door leaf (72) moves upward along the limiting slide rail (71) under the pulling force of the float (61) through the second flexible connector (63) and the hinge point (64).

5. A rainwater inspection well for treating mixed rainwater and sewage as described in claim 4, characterized in that: The weight of the float (61) is greater than that of the valve (7), and the float (61) always floats on the water surface (8) inside the inspection well (1).

6. A rainwater inspection well for treating mixed rainwater and sewage as described in claim 5, characterized in that: The hinge point (64) is set at a height lower than that of the rainwater pipe (3) and higher than that of the sewage pipe (4).

7. A rainwater inspection well for treating mixed rainwater and sewage as described in claim 6, characterized in that: The inspection well (1) is equipped with a flip-top cover (2) that can be opened and closed by flipping.

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