CN218969878U

CN218969878U - Reservoir intercommunication water delivery tunnel overhauls sediment outflow structure

Info

Publication number: CN218969878U
Application number: CN202221205025.1U
Authority: CN
Inventors: 吴疆; 张婷; 杨飞; 王恒乐; 汪剑国
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2023-05-05
Anticipated expiration: 2032-05-18

Abstract

The utility model provides a reservoir communication water delivery tunnel overhauling and sand discharging structure, which comprises a sand discharging main pipe and sand discharging branch pipes, wherein the sand discharging main pipe is paved in bottom plate concrete of a tunnel along the water flow direction; gates are arranged at the inlet and the outlet of the tunnel; the outlet end of the sand discharging main pipe is provided with a control valve, and the inlet end is closed. Compared with the traditional sand removing mode, the technical scheme of the utility model adopts the sand removing method in a breakthrough way, does not need to pump and remove accumulated water in the water delivery tunnel, can realize the sand removing effect by only using low-elevation high water pressure in the tunnel, has simple operation and high sand removing efficiency, has small influence on normal water supply of the water delivery tunnel, and has good practical applicability.

Description

Reservoir intercommunication water delivery tunnel overhauls sediment outflow structure

Technical Field

The utility model belongs to the field of hydraulic engineering, and particularly relates to a maintenance sand discharge structure of a reservoir communicated water delivery tunnel.

Background

In hydraulic engineering, reservoir intercommunication water delivery tunnel is because the elevation is lower, and the bottom is along the line more easily deposit silt, need regularly to clean up these silt, and traditional clearance mode is generally evacuated ponding in the water delivery tunnel, then manual work or machinery are cleared up the bottom plate along the silt. The mode is high in pumping cost, low in sediment cleaning efficiency and long in period, and even the normal water supply time of the water delivery tunnel can be influenced.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a overhauling and sand-discharging structure suitable for a reservoir communicating water delivery tunnel with a lower elevation.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a reservoir intercommunication water delivery tunnel overhauls sediment outflow structure, includes sediment outflow house steward and sediment outflow branch pipe, sediment outflow house steward is buried in the bottom plate concrete of tunnel along the rivers direction, the tunnel bottom surface is equipped with a plurality of sand collecting pits along the extending direction of sediment outflow house steward, sediment outflow branch pipe buries respectively in corresponding sand collecting pit bottom and will the sand collecting pit is linked together to sediment outflow house steward; gates are arranged at the inlet and the outlet of the tunnel; the outlet end of the sand discharging main pipe is provided with a control valve, and the inlet end is closed.

Further, the sand collecting pit is funnel-shaped with a large upper port and a small lower port.

Further, the sand discharge branch pipe is vertically arranged, the upper end of the sand discharge branch pipe is connected with the sand collecting pit, and the lower end of the sand discharge branch pipe is connected to the water discharge main pipe.

Further, the sand-discharging main pipe is obliquely paved along the slope of the bottom surface of the tunnel, and the outlet end extends out of the tunnel outlet.

Further, the inlet end of the sand discharging main pipe is in arc transition connection with the lower end of the sand discharging branch pipe closest to the tunnel inlet.

Further, the inlet end of the sand-discharging main pipe is closer to the tunnel inlet than the sand-discharging branch pipe closest to the tunnel inlet.

Further, an outlet end of the sand discharging main pipe is connected to a sand removing pool outside the tunnel, and a filtering grid mesh is arranged in the sand removing pool.

Furthermore, the filtering grids are arranged in multiple stages, and the diameters of the grids are gradually decreased from large to small.

Compared with the traditional sand removing mode, the technical scheme of the utility model adopts the sand removing method in breakthrough, does not need to pump and remove accumulated water in the water delivery tunnel, can realize the sand removing effect by only water pressure in the tunnel, has simple operation and high sand removing efficiency, has small influence on normal water supply of the water delivery tunnel, and has good practical applicability.

Drawings

Fig. 1 is a schematic cross-sectional view of the general arrangement of the present utility model.

FIG. 2 is a schematic cross-sectional view of a large sample of a sump pit according to the utility model.

FIG. 3 is a schematic cross-sectional view of a large sample of the sand removal tank of the present utility model.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Reference is made to the accompanying drawings. The embodiment comprises a sand main pipe 6 and sand branch pipes 5, wherein the sand main pipe 6 is obliquely paved in the bottom plate concrete of the tunnel 1 along the water flow direction, so that sediment is conveniently and smoothly discharged from the sand main pipe 6 under the action of dead weight and water pressure, and the sediment is prevented from being blocked in the sand main pipe 6. The sand collecting pits 4 are arranged at intervals and continuously along the extending direction of the sand discharging main pipe 6, and the sand collecting pits 4 are funnel-shaped with big upper ports and small lower ports, so that the sand discharging efficiency can be effectively improved. The sand discharge branch pipes 5 are respectively buried at the bottoms of the corresponding sand collecting pits 4 and are communicated with the sand collecting pits 4 to the sand discharge main pipe 6. Specifically, arrange the vertical setting of sand branch pipe 5, its upper end is connected and is gathered sand pit 4, and the lower extreme is connected to drainage house steward, guarantees the maximum discharge of silt. The outlet end of the sand-discharging main pipe 6 extends out of the outlet of the tunnel 1 and extends into the sand-cleaning pool 8, the outlet end is provided with a control valve 7, and the inlet end of the sand-discharging main pipe 6 is closed. In this embodiment, the inlet end of the sand removing manifold 6 is closer to the inlet of the tunnel 1 than the sand removing branch 5 closest to the inlet of the tunnel 1. Of course, the inlet end of the sand discharging main pipe 6 and the lower end of the sand discharging branch pipe 5 closest to the inlet of the tunnel 1 can be connected in an arc transition mode.

The tunnel 1 is communicated with two reservoirs, and an inlet gate 2 and an outlet gate 3 are respectively arranged at the inlet and the outlet of the tunnel 1. The sand removing pool 8 is internally provided with a plurality of filtering grids 9 which are arranged in a grading way, the diameters of the meshes of the grids 9 are gradually decreased from large to small, and filtered clear water is discharged into a downstream reservoir.

The specific operation method of the embodiment is as follows:

the water delivery tunnel 1 delivers water by self-gravity flow. During water supply, the inlet gate 2 and the outlet gate 3 of the water delivery tunnel 1 are both in an open state, and the control valve 7 is in a closed state; during sand discharge, the outlet gate 3 of the tunnel 1 is closed, the inlet gate 2 of the tunnel 1 is kept in an open state, and the control valve 7 is opened. At this time, under the action of high-pressure water in the water delivery tunnel 1, sediment in the sand collecting pit 4 flows along with water, flows through the sand discharge branch pipe 5 to the sand discharge main pipe 6, finally is discharged into the sand removal pond 8, and filtered clear water is discharged into a downstream reservoir.

It should be noted that the foregoing describes embodiments of the present utility model. However, it will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, which are described merely to illustrate the principles of the utility model, and that various changes and modifications may be made therein without departing from the scope of the utility model as claimed.

Claims

1. The utility model provides a reservoir intercommunication water delivery tunnel overhauls sediment outflow structure which characterized in that includes sediment outflow house steward and sediment outflow branch pipe, sediment outflow house steward is buried in the bottom plate concrete of tunnel along the rivers direction, the tunnel bottom surface is equipped with a plurality of sand collecting pits along the extending direction of sediment outflow house steward, sediment outflow branch pipe buries respectively in corresponding sand collecting pit bottom and will the sand collecting pit is linked together to sediment outflow house steward; gates are arranged at the inlet and the outlet of the tunnel; the outlet end of the sand discharging main pipe is provided with a control valve, and the inlet end is closed.

2. The reservoir communicating water delivery tunnel overhauling and sand draining structure is characterized in that the sand collecting pit is funnel-shaped with a large upper port and a small lower port.

3. The reservoir communicating water conveyance tunnel overhauling and sand draining structure as claimed in claim 1, wherein the sand draining branch pipe is vertically arranged, the upper end of the sand draining branch pipe is connected with the sand collecting pit, and the lower end of the sand draining branch pipe is connected with the sand draining main pipe.

4. A reservoir communicating water conveyance tunnel maintenance sediment outflow structure as set forth in claim 3 wherein said sediment outflow manifold is disposed obliquely along said tunnel floor slope and has an outlet end extending beyond said tunnel outlet.

5. A reservoir communicating water conveyance tunnel maintenance sediment outflow structure as set forth in claim 3, wherein said sediment outflow manifold inlet is connected in arc transition with said sediment outflow branch pipe lower end nearest to the tunnel inlet.

6. A reservoir communicating water conveyance tunnel servicing and sand draining structure as claimed in claim 3, wherein said sand draining manifold inlet end is located closer to the tunnel inlet than said sand draining branch pipe closest to the tunnel inlet.

7. The reservoir communicating water-conveying tunnel overhauling sand-draining structure according to any one of claims 1-6, characterized in that an outlet end of the sand-draining main pipe is connected to a sand-cleaning pool outside the tunnel, and a filtering grid is arranged in the sand-cleaning pool.

8. The reservoir communicating water delivery tunnel overhauling and sand discharging structure as claimed in claim 7, wherein the filtering grid is arranged in a plurality of stages, and the mesh diameter of the grid is gradually decreased from large to small.