Automatic control device for non-point source pollution

Abstract

The utility model relates to rain and pollution shunt technology field, and disclose a kind of non-point source pollution automatic control device, the inside of the sewage interception bin is provided with the automatic control device consisting of sewage interception bucket, movable gate, steel wire rope, fixed pulley and limiting device, the movable gate is slidably installed in the inside of limiting device, the steel wire rope is wound on fixed pulley, one end of the steel wire rope is movably connected with the two sides of movable gate, the other end of the steel wire rope is fixedly installed with the inner bottom wall of sewage interception bucket. According to the water body non-point source pollution concentration and runoff of entering device in rainfall process, the automatic switching of outlet and device reset are realized, and effective interception of sewage through rainwater outlet of street shop can also be achieved, to avoid non-point source pollution water source and street shop sewage directly into river, improve the control of non-point source pollution water body and rainwater sewage interception shunt, realize the control target of sewage interception shunt according to rainfall period.

Description

Technical Field

[0001] This utility model relates to the field of rainwater and sewage separation and drainage technology, specifically an automatic control device for non-point source pollution. Background Technology

[0002] During production, daily life, and business operations, a large amount of pollutants accumulate on the surface of the activity area, such as particulate dust, domestic waste, oil pollution, nitrogen, phosphorus, and toxic substances. Under the scouring action of rainwater at the beginning of the rainy season, these pollutants flow into the stormwater drainage network and eventually into rivers and lakes, causing water pollution. Traditional stormwater systems have failed to effectively address the problem of non-point source pollution discharge during surface rainwater collection. With increasing environmental awareness, the continuous advancement of rainwater and sewage separation, and the deepening exploration of non-point source pollution control, the most frequently mentioned solution is currently the installation of intelligent interception wells at the upstream of rainwater inlets. However, intelligent interception wells are large in size, occupy a large area, and their placement is constrained by urban land use, buildings, and underground pipe networks. Furthermore, they have long construction periods, high construction and maintenance costs, and large mixed flow rates after confluence, resulting in poor non-point source pollution separation control and less than ideal non-point source pollution control effects. Based on the characteristic that the concentration of non-point source pollutants gradually decreases with rainfall, the rational design of an automatic non-point source pollution separation control device is crucial for non-point source pollution control. Utility Model Content

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides an automatic control device for non-point source pollution. It can be installed in rainwater inlets or rainwater inspection wells as needed, diverting non-point source polluted water with high pollution concentrations to the sewage system. As rainfall runoff increases and the amount of water entering the device increases, it automatically closes the sewage discharge outlet, diverting the better-quality rainwater in the middle and later stages to the rainwater system, thus achieving automatic diversion control and solving the problems mentioned above.

[0004] (II) Technical Solution To solve the above problems, this utility model provides the following technical solution: an automatic control device for non-point source pollution, including an outer shell, with an inner partition wall fixedly installed inside the outer shell, dividing the interior of the outer shell into a sewage interception chamber and a rainwater chamber. The sewage interception chamber is equipped with an automatic control device consisting of a sewage interception hopper, a movable gate, a steel wire rope, a fixed pulley, and a limiting device. The sewage interception hopper is slidably mounted on the inner wall of the sewage interception chamber, and the movable gate is slidably mounted inside the limiting device. The steel wire rope is wound around the fixed pulley, with one end of the steel wire rope movably connected to both sides of the movable gate, and the other end of the steel wire rope fixedly installed to the inner bottom wall of the sewage interception hopper.

[0005] Preferably, the limiting device consists of two U-shaped frames that are connected to each other vertically. The fixed pulley and the limiting device are both fixedly installed on the inner wall of the intercepting chamber. The sewage outlet corresponding to the movable gate is embedded in the rear wall of the intercepting chamber.

[0006] Preferably, the top of the outer shell is movably fitted with a dirt trap, the top side wall of the rainwater chamber is movably fitted with a movable maintenance cover via a hinge, and a rainwater outlet is provided at the bottom of the inner wall of the rainwater chamber.

[0007] Preferably, the outer wall of the inner partition wall is fixedly installed with a siphon overflow pipe by clamps, the bottom of the inner partition wall is provided with a pressure relief hole, and the top of the inner partition wall is provided with a rainwater inlet.

[0008] Preferably, the horizontal position of the left end through hole of the siphon overflow pipe is higher than the horizontal position of the right end through hole.

[0009] (III) Beneficial Effects Compared with the prior art, the present invention provides an automatic control device for non-point source pollution, which has the following beneficial effects: This automatic non-point source pollution control device works as follows: In the initial stage of rainfall, water with high non-point source pollution concentration and low flow rate enters the device and flows into the intercepting chamber. At this time, the weight of the movable gate is greater than the sum of the weight of the intercepting hopper and its accumulated water, and the sewage is discharged into the municipal sewage system through the sewage outlet. In the middle and later stages of rainfall, water with lower pollution concentration and higher flow rate enters the device. Due to insufficient discharge from the sewage outlet, the water level in the intercepting chamber rises. At this time, the weight of the movable gate is less than the sum of the weight of the intercepting hopper and its accumulated water, causing the intercepting hopper to descend under gravity. This, along with a steel cable and fixed pulley, drives the movable gate to rise, closing the sewage outlet. Water then flows into the rainwater chamber through the rainwater inlet and is discharged into the municipal rainwater system through the rainwater outlet. After rainfall stops, no water enters the device. Rainwater in the rainwater chamber is drained through the rainwater outlet, and the accumulated water in the intercepting chamber is discharged into the rainwater chamber through an overflow siphon. When the combined weight of the intercepting hopper and the water inside is less than the weight of the movable gate, the movable gate descends to its original position, and the remaining water continues to be emptied through the overflow siphon, restoring all device structures to their original positions. This process automatically switches the outlet and resets the device based on the concentration and flow rate of non-point source pollution entering the device during rainfall. Simultaneously, it effectively intercepts sewage discharged indiscriminately by street-side shops through storm drains, preventing non-point source pollution and direct sewage discharge from street-side shops into rivers. This improves the control of non-point source pollution and stormwater interception and separation, achieving the goal of phased interception and separation control based on rainfall periods. Attached Figure Description

[0010] Figure 1 A schematic diagram showing the working status of an automatic control device for non-point source pollution during the initial stage of rainfall. Figure 2 A schematic diagram showing the working status of the automatic control device for non-point source pollution during the middle and late stages of rainfall; Figure 3 This diagram illustrates how accumulated water in the intercepting sewer is discharged through an overflow siphon after rainfall. Figure 4 This diagram shows the device resetting to its original state after the accumulated water in the sewage interception chamber has been drained.

[0011] In the diagram: 1. Outer shell; 2. Inner partition wall; 3. Rainwater outlet; 4. Sewage outlet; 5. Sewage interceptor hopper; 6. Movable gate; 7. Wire rope; 8. Fixed pulley; 9. Limiting device; 10. Movable inspection cover; 11. Movable hinge; 12. Rainwater inlet; 13. Clamp; 14. Siphon overflow pipe; 15. Pressure relief hole; 16. Sewage interceptor basket. Detailed Implementation

[0012] 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.

[0013] Please see Figure 1-4 An automatic control device for non-point source pollution includes an outer shell 1. An inner partition wall 2 is fixedly installed inside the outer shell 1, dividing the interior of the outer shell 1 into a sewage interception chamber and a rainwater chamber. The sewage interception chamber is equipped with an automatic control device consisting of a sewage interception hopper 5, a movable gate 6, a steel wire rope 7, a fixed pulley 8, and a limit device 9. In another embodiment, a real-time water quality monitoring device is installed inside the sewage interception chamber, and an electromagnetic valve is used instead of the movable gate 6, steel wire rope 7, fixed pulley 8, and sewage interception hopper 5 to form the automatic control device. The electromagnetic valve is equipped to automatically open and close based on the water quality monitoring results.

[0014] Please see Figure 1-4 The intercepting hopper 5 is slidably installed on the inner wall of the intercepting chamber and is located below the movable gate 6. The movable gate 6 is slidably installed inside the limiting device 9. The wire rope 7 is wound on the fixed pulley 8. One end of the wire rope 7 is movably connected to both sides of the movable gate 6, and the other end of the wire rope 7 is fixedly installed to the inner bottom wall of the intercepting hopper 5.

[0015] Please see Figure 1-4The limiting device 9 consists of two U-shaped frames that are connected vertically to each other, used to limit the movement range of the movable gate 6. Both the fixed pulley 8 and the limiting device 9 are fixedly installed on the inner wall of the intercepting chamber. The fixed pulley 8 is located above the sewage outlet 4, and its installation height is adjustable. A sewage outlet 4 corresponding to the movable gate 6 is embedded in the rear wall of the intercepting chamber; non-point source polluted water enters the municipal sewage system through the sewage outlet 4.

[0016] Please see Figure 1-4 The top of the outer casing 1 is equipped with a movable intercepting basket 16, which is used to initially intercept large particulate pollutants such as domestic waste, leaves, and gravel to prevent the outlet from being blocked. The top side wall of the rainwater chamber is movably installed with a movable maintenance cover 10 via a movable hinge 11. The other end of the movable maintenance cover 10 is placed above the inner partition wall 2, and the two are not connected. The movable maintenance cover 10 can be opened upwards to facilitate the cleaning and maintenance of the rainwater chamber. A rainwater outlet 3 is provided at the bottom of the inner wall of the rainwater chamber, through which rainwater is discharged into the municipal rainwater system.

[0017] Please see Figure 1-4 The outer wall of the inner partition wall 2 is fixedly installed with a siphon overflow pipe 14 by clamps 13. The horizontal position of the left end through hole of the siphon overflow pipe 14 is higher than the horizontal position of the right end through hole. The siphon overflow pipe 14 connects the sewage interception chamber and the rainwater chamber. A pressure relief hole 15 is opened at the bottom of the inner partition wall 2 to balance the pressure in the cavity below the sewage interception hopper 5. A rainwater inlet 12 is opened at the top of the inner partition wall 2. The size and height of the rainwater inlet 12 can be adjusted according to the rainwater runoff calculation.

[0018] Working principle: such as Figure 1 As shown, in the early stage of rainfall, water bodies with high concentrations of non-point source pollution and small flow rates enter the device and flow into the interception chamber. The sewage level in the interception hopper 5 is lower than the rainwater inlet 12. At this time, the weight of the movable gate 6 is greater than the sum of the weight of the interception hopper 5 and the water inside it. The sewage is discharged into the municipal sewage system through the sewage outlet 4.

[0019] like Figure 2 As shown, during the middle and late stages of rainfall, water with low pollution concentration and large flow rate enters the device. Due to insufficient discharge from the sewage outlet 4, the water level in the intercepting hopper 5 rises. At this time, the weight of the movable gate 6 is less than the sum of the weight of the intercepting hopper 5 and the water inside it. The intercepting hopper 5 descends under the action of gravity and is driven to rise by the steel wire rope 7 and the fixed pulley 8, thus closing the sewage outlet 4. At this time, the water flows into the rainwater chamber through the rainwater inlet 12 and is discharged into the municipal rainwater system through the rainwater outlet 3.

[0020] like Figure 3As shown, after the rainfall stops, no water enters the device. The rainwater in the rainwater chamber is drained through the rainwater outlet 3, and the water accumulated in the sewage interception chamber is discharged to the rainwater chamber through the siphon overflow pipe 14 under the action of siphon.

[0021] like Figure 4 As shown, when the combined weight of the intercepting hopper 5 and the water inside it is less than the weight of the movable gate 6, the movable gate 6 descends to its original position under the action of gravity, and drives the intercepting hopper 5 to rise and reset to the initial working condition of the device through the wire rope 7 and the fixed pulley 8. The remaining water continues to be discharged through the siphon overflow pipe 14, and all device structures return to their original positions.

[0022] The above process automatically switches the outlet and resets the device based on the concentration of non-point source pollution in the water entering the device during rainfall and the runoff. At the same time, it can effectively intercept sewage discharged by street shops through rainwater outlets, prevent non-point source pollution of water sources and sewage discharged by street shops directly into the river, improve the control of non-point source pollution water bodies and rainwater interception and diversion, and achieve the goal of phased interception and diversion control according to the rainfall period.

[0023] In summary, this invention controls the automatic opening and closing of the sewage outlet 4 in the intercepting chamber by varying the water flow rate entering the device at different stages. This achieves automatic diversion of non-point source pollutants to the municipal sewage system, reducing the pollution of rainwater systems by non-point source pollution. The invention features a simple structure and low operation and maintenance costs. Furthermore, the non-point source pollution automatic control device proposed in this invention can be installed independently as a rainwater inlet, or it can be installed within existing rainwater inlets or rainwater inspection wells, offering high operability.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic control device for non-point source pollution, comprising an outer casing (1), wherein an inner partition wall (2) is fixedly installed inside the outer casing (1), the inner partition wall (2) dividing the interior of the outer casing (1) into a sewage interception chamber and a rainwater chamber, characterized in that: The inside of the intercepting hopper is equipped with an automatic control device consisting of an intercepting hopper (5), a movable gate (6), a wire rope (7), a fixed pulley (8), and a limiting device (9). The intercepting hopper (5) is slidably installed on the inner wall of the intercepting hopper. The movable gate (6) is slidably installed inside the limiting device (9). The wire rope (7) is wound around the fixed pulley (8). One end of the wire rope (7) is movably connected to both sides of the movable gate (6), and the other end of the wire rope (7) is fixedly installed to the inner bottom wall of the intercepting hopper (5).

2. The automatic control device for non-point source pollution according to claim 1, characterized in that: The limiting device (9) is composed of two U-shaped frames that are connected to each other. The fixed pulley (8) and the limiting device (9) are both fixedly installed on the inner wall of the intercepting bin. The sewage outlet (4) corresponding to the movable gate (6) is embedded on the rear wall of the intercepting bin.

3. The automatic control device for non-point source pollution according to claim 1, characterized in that: The top of the outer shell (1) is movably fitted with a dirt trap (16), and the top side wall of the rainwater chamber is movably fitted with a movable maintenance cover (10) via a movable hinge (11). A rainwater outlet (3) is provided at the bottom of the inner wall of the rainwater chamber.

4. The automatic control device for non-point source pollution according to claim 1, characterized in that: The outer wall of the inner partition wall (2) is fixedly installed with a siphon overflow pipe (14) by a clamp (13). The bottom of the inner partition wall (2) is provided with a pressure relief hole (15), and the top of the inner partition wall (2) is provided with a rainwater inlet (12).

5. The automatic control device for non-point source pollution according to claim 4, characterized in that: The horizontal position of the left end through hole of the siphon overflow pipe (14) is higher than the horizontal position of the right end through hole.

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