CN219315666U

CN219315666U - Water delivery and distribution system for preventing backflow of tail end port of pipeline

Info

Publication number: CN219315666U
Application number: CN202320408666.5U
Authority: CN
Inventors: 赵云云; 卢生霞; 贾红娟
Original assignee: Gansu Water Conservancy And Hydropower Survey Design And Research Institute Co ltd
Current assignee: Gansu Water Conservancy And Hydropower Survey Design And Research Institute Co ltd
Priority date: 2023-03-07
Filing date: 2023-03-07
Publication date: 2023-07-07
Anticipated expiration: 2033-03-07

Abstract

The utility model discloses a water distribution system for preventing backflow of a pipeline tail port, which comprises a water pipeline, a stilling pool arranged at the tail end of the water pipeline and an open channel communicated with the downstream of the stilling pool, wherein the tail end of the water pipeline is provided with a backflow prevention elbow, the highest point of the lower wall of the backflow prevention elbow is higher than the highest water level of the open channel, the pipe orifice of the backflow prevention elbow faces downwards, and the pipe orifice of the backflow prevention elbow is a horn mouth. The utility model can prevent water from flowing back into the water pipe during water cut-off or maintenance, ensure normal maintenance work, simultaneously avoid the problem of blockage of the water pipe caused by sundries in the water flowing back, has low cost and strong reliability, and can automatically open and close the pipe orifice of the water pipe by self construction.

Description

Water delivery and distribution system for preventing backflow of tail end port of pipeline

Technical Field

The utility model relates to the technical field of hydraulic engineering, in particular to a water delivery and distribution system for preventing backflow of a pipeline end port.

Background

The pressurized pipeline water transmission and distribution engineering is gradually increased, and in the period of pipeline water interruption or maintenance, the problem that water in a stilling pool or a downstream open channel flows back to the tail end port of the pipeline often occurs, so that the pipeline maintenance and operation are affected, and meanwhile, the problem of blockage of the water transmission pipeline caused by sundries in the flowing back water can be caused.

An overhaul valve is arranged at the tail end of the pipeline (in front of the stilling pool), although downstream water flow can be blocked, the influence of backward water flow on overhaul and replacement of an upstream working valve is prevented. However, the maintenance valve has high cost, is easy to fail and has complicated operation of opening and closing.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the water delivery and distribution system for preventing the backflow of the tail end port of the pipeline, which can prevent water from flowing back into the water delivery pipeline during water cut-off or overhaul, ensure the normal operation of overhaul work, simultaneously avoid the blockage problem of the water delivery pipeline caused by sundries in the water flowing back, has low cost and strong reliability, and can automatically open and close the pipe orifice of the water delivery pipeline by self construction.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a prevent water delivery and distribution system of pipeline end port backward flow, includes the conduit, sets up at the terminal stilling pool of conduit and communicates the open channel at stilling pool low reaches, the terminal anti-return bend that is of conduit, the highest point of anti-return bend lower wall is higher than the highest water level of open channel, and the mouth of pipe of anti-return bend is down, and the mouth of pipe of anti-return bend is the horn mouth.

As a preferable technical scheme of the utility model, the bell mouth is provided with a sealer matched with the bell mouth through a longitudinal sliding rod.

As a preferable technical scheme of the utility model, the side surface of the sealer is connected with a supporting rod corresponding to a sliding rod, a through hole is formed in the supporting rod, the sliding rod is arranged in the through hole in a sliding way, and an anti-falling block is arranged at the lower end of the sliding rod.

As a preferable technical scheme of the utility model, the sealer is elliptic or fusiform with thinner upper and lower ends and thicker middle.

As a preferable embodiment of the present utility model, the density of the sealer is equal to or less than the density of water.

The beneficial effects of adopting above-mentioned technical scheme to produce lie in: according to the utility model, through the blocking effect of the backflow prevention bent pipe, water is prevented from flowing back into the water pipe during water stopping or overhauling, normal overhauling work is ensured, and meanwhile, the problem of blockage of the water pipe caused by sundries in the backflow water is avoided; further, the sealing device can seal the bell mouth when the water level of the downstream open channel is abnormally increased based on buoyancy, so that the problem of unavoidable backflow caused by the abnormal increase of the water level of the open channel only by means of the backflow prevention elbow pipe is solved. The cost is low, the reliability is strong, and the pipe orifice of the water pipe can be automatically opened and closed by means of self-construction.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

Fig. 1 is an overall construction diagram of the present utility model.

Fig. 2 is a perspective view of the sealer and flare of fig. 1 in assembled relationship.

In the figure: 1. the hydraulic pipeline 2, the stilling pool 3, the open channel 4, the backflow prevention elbow 5, the bell mouth 6, the highest point 7 of the lower wall of the backflow prevention elbow, the highest water level 8 of the open channel, the sealer 9, the slide bar 10, the anti-drop block 11 and the supporting rod.

Detailed Description

The structure of one embodiment of the utility model comprises a water pipe 1, a stilling pool 2 arranged at the tail end of the water pipe 1 and an open channel 3 communicated with the downstream of the stilling pool 2, wherein the tail end of the water pipe 1 is provided with a backflow prevention elbow pipe 4, the highest point 6 of the lower wall of the backflow prevention elbow pipe is higher than the highest water level 7 of the open channel, the pipe orifice of the backflow prevention elbow pipe 4 faces downwards, and the pipe orifice of the backflow prevention elbow pipe 4 is a horn mouth 5.

The bell mouth 5 is provided with a sealer 8 matched with the bell mouth 5 through a longitudinal sliding rod 9. The upper end of the sliding rod 9 is fixedly connected with the bell mouth 5, the sealer 8 plays a role in closing or opening the bell mouth 5 based on buoyancy ascending or descending, and particularly, when the open channel water level is abnormally increased, the backflow prevention elbow 4 is completely submerged, the backflow prevention problem can not be completely avoided only by the backflow prevention elbow 4, the sealer 8 seals the bell mouth 5 due to buoyancy ascending, and the backflow prevention work is assisted to be completed. When the water pipe 1 normally transmits water, the sealer 8 can be flushed away, and the normal water transmission is not affected.

The side of the sealer 8 is connected with a supporting rod 11 corresponding to the sliding rod 9, a through hole is formed in the supporting rod 11, the sliding rod 9 is arranged in the through hole in a sliding mode, and an anti-falling block is arranged at the lower end of the sliding rod. By the cooperation of the slide bar 9 and the rod 11, the sealer 8 can be lifted and lowered freely in the guiding direction of the slide bar 9.

The sealer 8 is elliptic or fusiform with thinner upper and lower ends and thicker middle. The sealer 8 adopts a streamline structure, so that the bell mouth 5 can be blocked when the water level of the open channel is abnormally increased, and the sealer can be quickly separated during normal water delivery, and the interference on water delivery pressure is reduced.

The density of the sealer 8 is equal to or less than the density of water.

The utility model has the advantages of low cost and high reliability by improving the pure mechanical structure, and has the function of preventing downstream open channel water from flowing back into the water conveying pipeline.

The above description is presented only as a practical solution of the utility model and is not intended as a single limitation on the solution itself.

Claims

1. The utility model provides a prevent defeated water distribution system of pipeline end port backward flow, includes conduit, sets up at the terminal stilling pool of conduit and communicates the open channel in stilling pool low reaches, its characterized in that: the tail end of the water conveying pipeline is provided with a backflow prevention elbow, the highest point of the lower wall of the backflow prevention elbow is higher than the highest water level of the open channel, the pipe orifice of the backflow prevention elbow faces downwards, and the pipe orifice of the backflow prevention elbow is a horn mouth.

2. The water delivery and distribution system for preventing backflow of a conduit end port of claim 1, wherein: the horn mouth is provided with a sealer matched with the horn mouth through a longitudinal sliding rod.

3. The water delivery and distribution system for preventing backflow of a conduit end port of claim 2, wherein: the side of the sealer is connected with a supporting rod corresponding to the sliding rod, a through hole is formed in the supporting rod, the sliding rod is arranged in the through hole in a sliding penetrating mode, and an anti-falling block is arranged at the lower end of the sliding rod.

4. A water delivery and distribution system for preventing backflow at a conduit end port as in claim 3, wherein: the sealer is elliptic or fusiform with thinner upper and lower ends and thicker middle.

5. A water delivery and distribution system for preventing backflow at a conduit end port as in any of claims 2-4 wherein: the density of the sealer is less than or equal to the density of water.