CN202081498U - Eccentric type curved weir intercepting well - Google Patents

Abstract

The utility model discloses an eccentric curved weir interception well. In the vertical well of the interception well, a curved overflow weir is vertically arranged. The curved overflow weir divides the interception well into an interception well chamber and an overflow well chamber. The cross section of the interception well chamber is circular, and the lower end of the interception well chamber There is a sewage inlet, and the upper end of the interception well chamber is provided with an interception sewage outlet. The outer inner wall of the sewage inlet is tangent to the inner wall of the interception well chamber, and the inner diameter of the sewage inlet is less than half of the inner diameter of the interception well chamber; There is a sewage interception and water outlet riser, the lower port of the sewage interception and water outlet riser is within the elevation range of the top and bottom of the sewage inlet, the geometric center of the lower port of the sewage interception and water outlet riser coincides with the central axis of the interception well chamber, and the interception of sewage and water discharge The upper port of the standpipe communicates with the intercepted sewage outlet through the intercepted sewage outlet horizontal pipe. The utility model is an eccentric curved weir intercepting well which can reduce deposition in the intercepting well and discharge excess flow as soon as possible when the amount of rainwater is large.

Description

Eccentric curved weir interception well

technical field

The utility model relates to an intercepting well in an intercepting combined drainage system, in particular to a pressure-bearing intercepting well whose elevation of an intercepting sewage outlet pipe is higher than that of an inlet pipe.

Background technique

The urban direct combined drainage system will cause serious water and natural environment pollution. In order to protect the environment and reduce pollution, the common countermeasure is to transform it into an intercepting combined drainage system, and the intercepting well is an important subsidiary structure. The traditional interception wells are all gravity flow interception wells, the elevation of the sewage interception outlet pipe is lower than the elevation of the water inlet pipe, and the water flow in the interception well is in the state of gravity flow. However, in some cases, for example, the constant water level of rivers and other water bodies near cities is relatively high, and the heightening of the embankment and the terrain along the river has resulted in the deep burial of the original confluence pipes and canals that directly discharge into the river, even reaching more than 10 meters. In order to reduce construction difficulty and cost, the interception main pipe with a relatively small buried depth is often used for the closure of the original straight-line combined pipe and canal. Therefore, during the closure reconstruction process, the elevation of the intercepted sewage outlet pipe is higher than the elevation of the water inlet pipe and canal. well. The sewage in this kind of interception well is under pressure. The type of interception well is generally designed as a rectangle. The inlet pipe is located in the middle of the interception well. Poor drainage during heavy rainfall.

Utility model content

The purpose of the utility model is to provide an eccentric curved weir interception well which reduces the deposition in the interception well and discharges excess flow as soon as possible when the amount of rainwater is large.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the well of the eccentric curved weir interception well is vertically provided with a curved overflow weir, and the curved overflow weir divides the interception well into an interception well chamber and an overflow Well chamber, the cross section of the interception well chamber is circular, the lower end of the interception well chamber is provided with a sewage inlet, the upper end of the interception well chamber is provided with an intercepted sewage outlet, and the outer inner wall of the sewage inlet and the interception well The inner wall of the chamber is tangent to each other, and the inner diameter of the sewage inlet is less than half of the inner diameter of the interception well chamber; the sewage interception and discharge standpipe is vertically arranged in the interception well chamber, and the lower port of the sewage interception and discharge standpipe is located at the sewage inlet Within the elevation range of the top and bottom ends of the sewage intercepting outlet riser, the geometric center of the lower port of the intercepting sewage outlet riser coincides with the central axis of the interception well chamber, and the upper port of the intercepting sewage outlet water riser and the intercepted sewage outlet pass through the intercepting sewage The water outlet horizontal pipe is connected.

Further, an energy dissipation plate is provided in the overflow well chamber of the utility model.

Furthermore, the lower port of the sewage intercepting and water outlet standpipe of the utility model is in the shape of a bell mouth.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The sewage inlet is connected to the interception well chamber from the eccentric position, so that the water flow enters the circular interception well chamber and forms a swirling flow in the well chamber, forming a strong scouring effect in the interception well chamber, so that the suspended solids in the sewage are not easy to produce deposition;

(2) The swirling flow field in the interception well chamber makes it easy for the suspended solids in the sewage to gather in the middle of the well chamber, and under the pressure of the sewage in the well, it is concentrated and discharged from the lower port into the interception outlet pipe, which can effectively reduce the suspension of solids in the interception well deposition of matter;

(3) The weir length of the curved overflow weir is 1.6 times that of the traditional rectangular weir, and the flow through it under the same water head is also 1.6 times that of the rectangular weir, which greatly increases the discharge capacity of the overflow weir.

Description of drawings

Fig. 1 is the top view of the interception system of the utility model interception well;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the working plan of the dry flow working condition of the interception system of the utility model interception well;

Fig. 4 is the work plan view of the overflow condition of the interception system of the utility model interception well;

Fig. 5 is the tangential detailed diagram of the sewage inlet of the utility model interception well and the interception well chamber;

In the figure, 1. Curved overflow weir; 2. Standpipe for sewage interception and discharge; 3. Horizontal pipe for interception and discharge of sewage; 4. Lower port;

5. Upper fixed bracket; 6. Lower fixed bracket; 7. Sewage inlet; 8. Sewer interceptor main pipe; 9. Sewer interceptor inspection well; 10. Energy dissipation board; ; 13. overflow well chamber; 14. intercepted sewage outlet; 21. lower port; 22. upper port; 71. outer inner wall of sewage inlet.

Detailed ways

As shown in Fig. 1 and Fig. 2, in the intercepting shaft of the present invention, a curved overflow weir 1 is vertically arranged, and the curved overflow weir 1 separates the intercepting shaft into an intercepting shaft chamber 12 and an overflow shaft chamber 13.

Wherein, the cross section of the intercepting well chamber 12 is circular, so that the incoming water can form a swirling flow in the intercepting well chamber. The lower end of the intercepting well chamber 12 is provided with a sewage inlet 7 , and the upper end of the intercepting well chamber 12 is provided with an intercepting sewage outlet 14 .

As shown in Figures 1, 3, 4, and 5, the outer inner wall 71 of the sewage inlet 7 is tangent to the inner wall of the interceptor chamber 12, and the inner diameter of the sewage inlet 7 is less than half of the inner diameter of the interceptor chamber 12, so that the sewage inlet is The eccentric water inlet mode makes the water flow form a swirling flow in the interception well chamber. The peripheral linear velocity and scouring force of the swirling flow are strong. This design can greatly reduce the deposition of suspended solids in the sewage in the interception well chamber 12 by utilizing the strong scouring force of the swirling flow, and make the suspended solids in the sewage collect in the middle of the well.

In the interception well chamber 12, vertically be provided with intercepting sewage outlet standpipe 2, and intercepting sewage outlet water riser 2 adopts the mode that water enters from the interception well chamber bottom and upwards flows out. The lower port 21 of the intercepting sewage outlet riser 2 is within the elevation range of the top and bottom of the sewage inlet 7, the geometric center of the lower port 21 of the sewage intercepting outlet riser 2 coincides with the central axis of the intercepting well chamber 12, and the sewage intercepting outlet vertically The upper port 22 of the pipe 2 communicates with the intercepted sewage outlet 14 through the intercepted sewage outlet horizontal pipe 3 . The lower port 21 of the sewage interception outlet standpipe 2 extends to the bottom of the interception well chamber 12, so that the suspended solids in the middle of the interception well chamber can be concentrated from the lower port 21 into the sewage interception outlet stand under the relatively large hydrostatic pressure in the well chamber. Pipe 2, and discharge from the sewage intercepting and outlet horizontal pipe 3 into the sewage intercepting pipe inspection well 9, and be transported to the sewage plant by the sewage intercepting main pipe 8.

Under the condition of dry flow, it is necessary to intercept all the sewage into the intercepting main pipe 8, and try to prevent the suspended solids in the sewage from depositing in the intercepting well chamber. As shown in Figure 3, under the dry flow condition of the utility model, the sewage enters the interception well chamber 12 from the eccentric position through the sewage inlet 7, and forms a swirl flow in the circular interception well chamber, and the strong scouring force around the swirl flow Under the action, the suspended solids in the sewage around the interception well chamber 12 are not easy to deposit, while the speed and scouring force in the center are relatively small, and the suspended solids are relatively concentrated, and enter through the lower port 21 under the hydrostatic pressure of the sewage in the well chamber. Intercept sewage outlet riser 2, and discharge into sewage interceptor inspection well 9 from intercept sewage outlet horizontal pipe 3.

During rainfall, overflow occurs when inflow exceeds interception. As shown in Figure 4, under the overflow condition of the utility model, the overflow flow enters the overflow well chamber 13 through the curved weir 1, and is discharged into the water body after passing through the energy dissipation plate 10 for energy dissipation. The curved overflow weir 1 is a part of the circular interception well chamber 12. Its weir length is 1.6 times that of the traditional rectangular weir, and its flow rate under the same water head is also 1.6 times that of the rectangular weir, which greatly increases the capacity of the overflow weir. discharge capacity. The elevation of the top surface of the curved overflow weir 1 is lower than the elevation of the top surface of the interception well chamber 12, and the elevation of the top surface of the curved overflow weir 1 is determined according to the interception multiple.

The overflow well chamber 13 is provided with an energy dissipating plate 10, which can dissipate the energy of the overflowing and falling water flow, and avoid the scour of the well wall and the well bottom by the water flow with a higher speed.

As a preferred embodiment of the present utility model, the lower port 21 of the sewage intercepting water outlet standpipe 2 is in the shape of a bell mouth, which can improve the hydraulic condition of the water outlet.

The sewage intercepting water outlet standpipe 2 of the utility model is fixed by the upper fixing bracket 5 and the lower fixing bracket 6 in the intercepting well chamber 12, which can avoid instability when the flow is large.

The horizontal pipe 3 for intercepting sewage and water outlet of the utility model has the minimum design slope of the drainage pipe with corresponding pipe diameter to the inspection well 9 of the sewage intercepting pipe, so as to avoid silting in the pipe. The elevation of the inner bottom of the sewage intercepting water outlet horizontal pipe 3 in the sewage intercepting inspection well 9 needs to be higher than the maximum water surface elevation in the sewage intercepting main pipe 8, so as to avoid backflow.

Claims (3)

1. An eccentric curved weir intercepting well is characterized in that: a curved overflow weir (1) is vertically arranged in the intercepting well, and the intercepting well is divided into intercepting well chambers by the curved overflow weir (1) ( 12) and overflow well chamber (13), the cross section of the interception well chamber (12) is circular, the lower end of the interception well chamber (12) is provided with a sewage inlet (7), the interception well chamber ( The upper end of 12) is provided with an intercepted sewage outlet (14), the outer inner wall (71) of the sewage inlet (7) is tangent to the inner wall of the interception well chamber (12), and the inner diameter of the sewage inlet (7) is smaller than the interception well Half of the inner diameter of the chamber (12); vertically set the sewage intercepting outlet riser (2) in the intercepting well chamber (12), and the lower port (21) of the sewage intercepting outlet riser (2) is in the sewage Within the elevation range of the top and bottom ends of the inlet (7), the geometric center of the lower port (21) of the intercepting sewage outlet riser (2) coincides with the central axis of the intercepting well chamber (12), and the intercepting sewage The upper port (22) of the water outlet standpipe (2) communicates with the intercepted sewage outlet (14) through the intercepted sewage outlet horizontal pipe. 2. The eccentric curved weir interception well according to claim 1, characterized in that: the overflow well chamber (13) is provided with an energy dissipation plate (10). 3. The eccentric curved weir interception well according to claim 1 or 2, characterized in that: the lower port (21) of the sewage interception outlet riser (2) is bell-shaped.

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