CN203412082U - Initial rainwater abandonment device - Google Patents

Abstract

The utility model discloses a class device is abandoned to initial stage rainwater belongs to the drainage engineering field, in particular to drainage structures of initial stage rainwater separation. The rainwater separation device is suitable for initial rainwater separation of urban rainwater pipelines. The hydraulic pipe has the advantages of smooth and smooth pipeline, good hydraulic condition, small head loss and small impact of water flow on the pipe fitting, and is suitable for various pipe diameters. The initial rainwater separation amount is adjustable, the working condition switching is reliable, and electric drive is not needed. Install along urban rainwater pipeline, separate the initial stage rainwater in its catchment area and discharge into sewage pipe, send into sewage treatment plant and handle, later stage rainwater rethread rainwater pipeline discharges into the water, controls non-point source effectively and pollutes, protects the quality of water.

Description

Initial rainwater abandonment device

technical field

The utility model relates to an initial rainwater abandonment device, which belongs to the field of drainage engineering, in particular to a drainage structure for separating initial rainwater.

Background technique

Urban rainwater drainage is generally organized drainage. The rainwater on the ground is collected and discharged to the rainwater pipe through the runoff, and then discharged into the natural water body through the rainwater pipe system. In the early stage of rainfall, the rainwater dissolved a large amount of polluting gases such as acid gas, automobile exhaust, and factory exhaust gas in the air. Organic matter, pathogens, heavy metals, grease, suspended solids and other pollutants. Therefore, the pollution level of the initial rainwater is relatively high, usually exceeding the pollution level of ordinary urban sewage. In order to effectively protect the environment, the initial rainwater must be separated, and the rainwater at the initial stage of rainfall is separated and discharged to the sewage pipe, and then sent to the sewage treatment plant for treatment. After a certain rainfall process, the pollutants on the ground are washed away by the rainwater, and the pollution level in the later period of the rainfall is greatly reduced, and then discharged into the natural water body through the rainwater pipeline, effectively protecting the water quality of the natural water body. At present, most cities in China do not carry out initial rainwater separation treatment, but discharge the initial rainwater and later rainwater directly into natural water bodies, which will cause pollution to water bodies.

Rainwater is a precious resource, and more and more people pay attention to rainwater collection and utilization. Rainwater collection and utilization is mainly to store rainwater in the reservoir, and after proper treatment, it can be used for landscape water, spraying road surface, greening irrigation, etc. In the field of rainwater harvesting and utilization, the practice of discarding the initial rainwater at the beginning of rainfall and collecting the later rainwater is called initial rainwater abandonment. In the prior art, an initial rainwater discarding device is installed before the rainwater enters the storage tank, and the initial rainwater is separated and discharged, while the late rainwater is collected and stored in the storage tank. The current national standard map "Rainwater Comprehensive Utilization" 10SS705 separates the initial rainwater through the diversion well and the waste flow controller. According to the rainfall time, rainfall and other factors, the electric valve is used to control the later rainwater to enter the storage tank.

The purposes of the above two kinds of initial rainwater separation are different, but they also involve the initial rainwater abandonment device. The former is to separate the heavily polluted early rainwater and send it to the sewage treatment plant for treatment, and the cleaner later rainwater is discharged into the natural water body. From the perspective of environmental protection, it achieves the purpose of controlling non-point source pollution and protecting water quality. Rainwater abandonment devices are distributed on rainwater pipes at regular intervals. The latter is to discard the heavily polluted initial rainwater and collect the later rainwater into the storage tank. From the perspective of rainwater utilization, it achieves the purpose of reducing the water quality treatment process and treatment cost of rainwater utilization. It is arranged in the rainwater utilization storage tank. before.

Most of the initial rainwater abandonment devices used for rainwater collection and utilization are complete sets of equipment with small pipe diameters and low flow rates. For example, the rainfall-type initial rainwater discarding device in the national standard map "Rainwater Comprehensive Utilization" 10SS705 has product specifications of DN100, DN150, DN200, and DN250, which can only be used for rainwater collection and utilization, and are not suitable for controlling non-point source pollution and protecting water bodies. Water quality for incipient rainwater separation. At present, there are many schemes for initial rainwater separation, most of which are used for rainwater collection and utilization. The initial rainwater abandonment device introduced by some materials is theoretically feasible, but the pipeline and separation structure are complicated, the hydraulic conditions are poor, and the head loss is large. The use of high-flow rainwater pipelines not only affects drainage performance, but is also easily damaged under the impact of strong water flow. Some schemes also need to be driven by electricity, which is of little use value in rainwater pipeline projects used to control initial rainwater pollution.

Contents of the invention

The purpose of the present invention is to provide an initial rainwater abandonment device, which is suitable for the initial rainwater separation for controlling non-point source pollution and protecting water quality. The beneficial effect is that the pipeline is smooth and smooth, the hydraulic condition is good, the water head loss is small, the impact of the water flow on the pipe fittings is small, and it is suitable for various pipe diameters. The amount of initial rainwater separation is adjustable, the switching of working conditions is reliable, and no electric drive is required.

The utility model is realized through the following technologies: the initial rainwater discarding device mainly includes a water inlet pipe 1, an outlet pipe 2, a valve 3, a waste water pool 4, a discarding pipe 5, a bypass pipe 6, and a float chamber 7. The valve 3 is located between the water inlet pipe 1 and the water outlet pipe 2, and the lower part of the valve 3 is a waste water pool 4. The initial working condition valve 3 is opened when not raining, and the rainwater at the initial stage of rainfall is discharged into the waste water tank 4 through the valve 3, and the waste water tank 4 communicates with the jettison 5, and the initial rainwater is discharged into the sewage pipe through the jet 5. One side of the water inlet pipe 1 is provided with a bypass pipe 6, the bypass pipe 6 communicates with the float chamber 7, and a control gate 11 is provided between the bypass pipe 6 and the float chamber 7, and the control gate 11 is composed of a gate plate 15, a gate groove 16. It consists of positioning hole 17 and locking pin 18. The gate plate 15 can move up and down in the gate groove 16 and is fixed by the positioning hole 17 and locking pin 18. The gate plate 15 is used to adjust the flow of the bypass pipe 6 into the float chamber 7. While the initial rainwater is discharged into the waste water tank 4, a part of water enters the float chamber 7 through the bypass pipe 6. There is a float 8 inside the float chamber 7, the float 8 is connected with the rotating shaft 10 through the connecting rod 9, and the rotating shaft 10 is connected with the valve 3, there is no water in the float chamber 7 at the initial stage of rainfall, and as the rainfall duration increases, the water level in the float chamber 7 keeps increasing. As it rises, the float 8 drives the rotating shaft 10 to rotate through the connecting rod 9, thereby driving the valve 3 to close, and the rainwater flows directly from the inlet pipe 1 to the outlet pipe 2, and no longer flows into the waste water pool 4, completing the working condition conversion from the initial rainwater to the later rainwater . Rotating shaft 10 is provided with regulating plate 19, and arc-shaped groove 20 is arranged on regulating plate 19, and connecting rod 9 can be adjusted the position on arc-shaped groove 20 by fixing button 21, is used for regulating the water level that float 8 closes completely in valve 3. The lower part between the waste water tank 4 and the float chamber 7 is provided with a drain hole 22 for communication. After the rain stopped, the water in the float chamber 7 slowly flows to the waste water tank 4 through the drain hole 22, and the float 8 falls thereupon, and the valve 3 Open and repeat the above process when it rains again. A side drain hole 22 of the float chamber 7 is provided with a filter screen 23 to prevent the drain hole 22 from clogging, and a ball valve 26 is provided at the outlet of the drain hole 22 on one side of the waste water pool 4, which can control the flow of the float chamber 7 Free time.

The utility model is installed along the rainwater pipeline, and one is set at a certain distance, and the initial rainwater in the catchment area is separated and discharged into the sewage pipeline, and sent to the sewage treatment plant for treatment, and the later rainwater is discharged into the water body through the rainwater pipeline, effectively Control non-point source pollution and protect water quality.

Description of drawings

Fig. 1 is a plan view of the utility model;

Fig. 2 is the longitudinal sectional view of the rainwater working condition in the initial stage of the utility model;

Fig. 3 is a cross-sectional view of the rainwater working condition in the initial stage of the utility model;

Fig. 4 is a longitudinal section view of the rainwater working condition in the latter stage of the utility model;

Figure 5 is a cross-sectional view of the rainwater working condition in the latter stage of the utility model;

Fig. 6 is a schematic diagram of the control gate;

Figure 7 is a schematic diagram of floating ball adjustment;

Figure 8 is a schematic diagram of the weep hole.

In the figure: 1-inlet pipe, 2-outlet pipe, 3-valve, 4-wastewater tank, 5-disposal flow pipe, 6-bypass pipe, 7-float chamber, 8-float, 9-connecting rod, 10- Rotary shaft, 11-control gate, 12-well body, 13-inspection port, 14-worktable, 15-gate, 16-gate groove, 17-positioning hole, 18-lock pin, 19-adjusting plate, 20-arc Shaped groove, 21-fixed button, 22-drain hole, 23-filter screen, 24-filter screen base, 25-filter screen fixed frame, 26-ball valve.

Detailed ways

The utility model is made of HDPE high-density polyethylene material, and the outer wall is provided with reinforcing ribs to increase the overall rigidity, and can be made into pipe fittings of various common pipe diameters. The pipe diameters of the water inlet pipe 1 and the water outlet pipe 2 are consistent, and a valve 3 is set at the bottom of the water inlet pipe 1 and the water outlet pipe 2. The lower part of the valve 3 is connected to the waste water pool 4 and the waste water pool 4. The flow pipe 5 is discharged into the sewage pipe, and the flow pipe 5 is divided into two specifications of left and right water outlets, so as to adapt to the needs of different water outlet directions. One side of the water inlet pipe 1 is provided with a bypass pipe 6, and the bypass pipe 6 communicates with the float chamber 7, and a control gate 11 is provided between the bypass pipe 6 and the float chamber 7. A float 8 is provided in the float chamber 7, and the float 8 is connected with the rotating shaft 10 through the connecting rod 9, and the rotating shaft 10 is connected with the valve 3, and the lifting of the float 8 can drive the opening and closing of the valve 3. The float 8 adopts HDPE high-density polyethylene material to make the shell, and the inside is filled with foamed plastic, and the connecting rod 9 and the rotating shaft 10 are made of stainless steel.

The pipe fittings are built in the well body 12, the inspection port 13 is set on the top of the well body 12, and the workbench 14 is set in the well for easy maintenance. The installation plan of the utility model is shown in Fig. 1.

When there is no rain, there is no water in the float chamber 7, and the float 8 drops to the lowest position, and the valve 3 is fully opened by the connecting rod 9 and the rotating shaft 10. In the early stage of rainfall, the initial rainwater with pollutants carried by the confluence of the ground flows into the initial rainwater disposal device through the rainwater pipe. When it flows from the inlet pipe 1 to the outlet pipe 2, because the valve 3 is open, the initial rainwater flows from the valve 3 into the waste water tank 4 , and then discharged to the sewage pipeline through the discarding flow pipe 5. This is the initial rainwater condition, see Figure 2 and Figure 3.

While the initial rainwater is discharged into the wastewater tank 4, part of the water enters the float chamber 7 through the bypass pipe 6. As the rainfall duration increases, the water level in the float chamber 7 continues to rise, and the float 8 rises accordingly, and the float 8 passes through the connecting rod 9. , the rotating shaft 10 drives the valve 3 to gradually close, and the rainwater directly flows from the water inlet pipe 1 to the water outlet pipe 2, and no longer flows into the waste water pool 4. The water level in the float chamber 7 continues to rise, and the float 8 is subjected to a large force so that the valve 3 is tightly closed. At this time, it is the later rainwater condition, see Figure 4 and Figure 5.

The control of the initial rainfall is calculated according to the ground runoff with a thickness of 3-5mm in the catchment area of the waste flow device at this level. The control gate 11 installed between the bypass pipe 6 and the float chamber 7 can regulate the flow of the bypass pipe 6 into the float chamber 7 . Control gate 11 is made up of gate plate 15, gate groove 16, positioning hole 17, locking pin 18, and gate plate 15 can move up and down in gate groove 16, is fixed by positioning hole 17 and locking pin 18. An adjusting plate 19 is provided on the rotating shaft 10, and an arc-shaped groove 20 is arranged on the adjusting plate 19. The position of the connecting rod 9 on the arc-shaped groove 20 can be adjusted by a fixing button 21, and is used to adjust the water level of the float 8 when the valve 3 is completely closed. . Both of these mechanisms can achieve the purpose of regulating the initial rainwater abandonment flow. The schematic diagram of the control gate is shown in Figure 6, and the schematic diagram of the float adjustment is shown in Figure 7.

The lower part between the waste water tank 4 and the float chamber 7 is provided with a drain hole 22 for communication. After the rain stopped, the water in the float chamber 7 slowly flows to the waste water tank 4 through the drain hole 22, and the float 8 falls thereupon, and the valve 3 Open, at the outlet of one side weep hole 22 of the waste water pool 4, a ball valve 26 is installed, which can control the emptying time of the float chamber 7. Adjust the ball valve 26 to make the valve 3 open for about 12 hours, and the interval between two rainfalls less than the open time seldom produces ground pollution, and the initial rainwater abandonment flow working condition is not implemented. Not fully opened as valve 3 has just been opened, there is a small amount of pollution generated in about half a day, and a small amount of initial rainwater is discarded. Because the water level in the float chamber is still higher now, valve 3 will be closed soon. After the rainfall stopped completely, the water in the float chamber 7 was emptied to restore the initial state, and the above process was repeated when it rained again. One side drain hole 22 of float chamber 7 is provided with filter screen 23 outside, prevents drain hole 22 from clogging, and filter screen 23 is installed on the filter screen base 24, adopts filter screen holder 25 to fix.

In practical application, grit wells and grids should be installed in front of the initial rainwater abandonment device to settle the sand with larger particles and filter larger floating objects, so as to reduce the maintenance workload of the initial rainwater abandonment device.

Claims (6)

1. an early-stage rainwater stream abandoning device, mainly comprise water inlet pipe (1), outlet pipe (2), valve (3), wastewater disposal basin (4), abandoned stream pipe (5), bypass pipe (6), float chamber (7), it is characterized in that: described valve (3) is positioned between water inlet pipe (1) and outlet pipe (2), the bottom of valve (3) is wastewater disposal basin (4), and wastewater disposal basin (4) communicates with abandoned stream pipe (5).

2. early-stage rainwater stream abandoning device according to claim 1, it is characterized in that: a side of described water inlet pipe (1) is provided with bypass pipe (6), bypass pipe (6) communicates with float chamber (7), is provided with and controls lock (11) between bypass pipe (6) and float chamber (7).

3. early-stage rainwater stream abandoning device according to claim 1, is characterized in that: in described float chamber (7), be provided with float (8), float (8) is connected with rotating shaft (10) by connecting rod (9), and rotating shaft (10) is connected with valve (3).

4. early-stage rainwater stream abandoning device according to claim 1, it is characterized in that: the bottom between described wastewater disposal basin (4) and float chamber (7) is provided with spilled water hole (22) UNICOM, a side spilled water hole (22) at float chamber (7) is outside equipped with screen pack (23), at the port of export of a side spilled water hole (22) of wastewater disposal basin (4), is provided with ball valve (26).

5. early-stage rainwater stream abandoning device according to claim 2, it is characterized in that: described control lock (11) is comprised of flashboard (15), lock groove (16), locating hole (17), stop pin (18), flashboard (15) can move up and down in lock groove (16), fixing by locating hole (17) and stop pin (18).

6. early-stage rainwater stream abandoning device according to claim 3, it is characterized in that: described rotating shaft (10) is provided with adjustable plate (19), on adjustable plate (19), have deep-slotted chip breaker (20), connecting rod (9) can be adjusted at the position on deep-slotted chip breaker (20) by fixing button (21).

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