CN1201095A

CN1201095A - Structure for hydropower station preventing reservoir from silting

Info

Publication number: CN1201095A
Application number: CN 97108085
Authority: CN
Inventors: 陈启星
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-30
Filing date: 1997-05-30
Publication date: 1998-12-09

Abstract

The present invention is characterized by that the water guide pipe is installed at bottom portion of the dam, and the suction pipe with many branches if extended over reservoir bottom of large area and uniformly distributed, and the bottom portion of the suction pipe is equipped with many suction holes, so that in the most of bottom of reservoir the suction holes are extensively distributed,and the reservoir sediment can be carried away by means of force of water stream produced when sucking water to prevent sediment accumulation.

Description

The structure of hydropower station preventing reservoir from silting

The invention belongs to the invention of power station dam structure and water guide mode aspect.

For the power station, the consequence of reservoir from silting is exactly that reservoir capacity reduces, even damages reservoir and power station.It is predicted that the power station, Three Gorges will have a greatly reduced quality its generating and flood control function because of the silt alluvial in about 20 years after putting into operation.Power station now all is the structure that adopts Fig. 3, by aqueduct 2 water is drawn from the top of reservoir dam 1, through guide water machine 4 behind certain drop.This structure makes that silt is difficult to flow out through aqueduct, thereby causes silt to deposit in the consequence of reservoir.

The present invention attempts to make silt along with current together flow out by changing the fit structure of reservoir dam 1 and aqueduct 2, to reach the purpose that prevents the silt alluvial.

Feature of the present invention is the bottom that aqueduct 2 is contained in dam 1, and extends suction water pipe 3 some zones to the reservoir bottom from aqueduct 2, and the strength of current is together taken away the silt of reservoir bottom when utilizing the suction water pipe suction.Among Fig. 1, the aqueduct 2 of dam 1 is installed on the dam bottom, because aqueduct 2 is in the bottom, so silt flows out together in company with water easily, but this can only wash away near the silt the dam, if will make reservoir keep original storage capacity effectively, light washes away near the silt of dam not enough, also the silt in big zone, reservoir bottom also must be washed away, for this reason, I have designed a kind of method, make that the water that rushes at the water machine all is the bottom sucking-off from the big zone of reservoir, wash away thereby make the silt in its big zone also be sucked out, to reach the purpose of keeping storage capacity.Its concrete grammar is to extend the large-area bottom of suction water pipe 3 to reservoir from mozzle 2, suction water pipe can be made a lot of branches, curved shape or broken line shape are distributed in the bottom of reservoir, many suctions hole k (marking with the stain signal) has been opened in the bottom of suction water pipe 3 in suction water pipe, so, very big zone, the reservoir bottom suction hole k that all distributing, the strength of current is together taken away the silt of reservoir bottom when utilizing suction, thereby avoid the alluvial of silt, prolong the application life that resembles the power station that sediment charge is very high in the such current in power station, Three Gorges.Further, on suction hole k, install additional and shake the control valve, just can regulate the ability that each zone siphons away silt to control the water absorption in each hole.Pad stone steps 6 supports suction water pipe 3, makes suction water pipe keep good position and certain height, and can avoid stone to suck and damage water machine.

Under high hydraulic pressure, current and silt drive water machine 4.The structure of this dam and aqueduct also has following supplementary features: 1. for preventing that the damage of stone to the water machine, the size of hole k from will decide according to the requirement of water machine, and the damage water machine to stop excessive stone to enter aqueduct 2.2. because silt may damage aqueduct and water machine to amassing month washing away of base the day of aqueduct 2, so the anti abrasive material of the confidential employing of aqueduct and water.3. aqueduct is wanted horizontal positioned with suction water pipe or is become small inclination to place with level, is beneficial to silt and discharges.4. suction water pipe 3 can be made the structure of multiple-limb, makes its distribution area in the reservoir bottom wider, the better effects if of sucking-off silt.5. for the structure that does not adopt suction water pipe shown in Figure 4, suck aqueduct 2 for fear of stone, can adopt protective screening 5 to protect, each face of protective screening is all made the face at inclination angle in order to avoid stop up.

Among Fig. 1, Fig. 2, dam 1, aqueduct 2, suction water pipe 3, the stain that marks in the suction water pipe 3 is opened the bottom at suction water pipe for suction hole k, suction hole, water machine 4, pad stone steps 6, tail water 7, reservoir embankment 8.

This structure has following benefit: 1. avoided silt to deposit in reservoir.Also can generate electricity when 2. water level is low.3. can not produce the loss of head because of aqueduct.

Claims

1, the present invention is the invention of the dam structure and the guiding water flow mode in power station, it is characterized in that aqueduct 2 is contained in the bottom of dam 1, and some zones from aqueduct 2 extension suction water pipes 3 to the reservoir bottom, the strength of current is together taken away the silt of reservoir bottom when utilizing the suction water pipe suction.Among Fig. 1, the aqueduct 2 of dam 1 is installed on the dam bottom, because aqueduct 2 is in the bottom, so silt flows out together in company with water easily, but this can only wash away near the silt the dam, if will make reservoir keep original storage capacity effectively, light washes away near the silt of dam not enough, also the silt in big zone, reservoir bottom also must be washed away, for this reason, I have designed a kind of method, make that the water that rushes at the water machine all is the bottom sucking-off from the big zone of reservoir, wash away thereby make the silt in its big zone also be sucked out, to reach the purpose of keeping storage capacity.Its concrete grammar is to extend the large-area bottom of suction water pipe 3 to reservoir from mozzle 2, suction water pipe can be made a lot of branches, curved shape or broken line shape are distributed in the bottom of reservoir, many suctions hole k has been opened in the bottom of suction water pipe 3, so, very big zone, the reservoir bottom suction hole k that all distributing, the strength of current is together taken away the silt of reservoir bottom when utilizing suction, thereby avoid the alluvial of silt, prolong the application life that resembles the power station that sediment charge is very high in the such current in power station, Three Gorges.Further, on suction hole k, install additional and shake the control valve, just can regulate the ability that each zone siphons away silt to control each empty water absorption.Pad stone steps 6 supports suction water pipe 3, makes suction water pipe keep good position and certain height, and can avoid stone to suck and damage water machine.

2, reservoir structure according to claim 1, its further feature is to extend the large-area bottom of suction water pipe 3 to reservoir from mozzle 2, suction water pipe can be made a lot of branches, be distributed in the bottom of reservoir, many suctions hole k has been opened in the bottom of suction water pipe 3, so, very big zone, the reservoir bottom suction hole k that all distributing, the strength of current is together taken away the silt of reservoir bottom when utilizing suction, thereby avoid the alluvial of silt, prolong the application life that resembles the power station that sediment charge is very high in the such current in power station, Three Gorges.Further, on suction hole k, install additional and shake the control valve, just can regulate the ability that each zone siphons away silt to control the water absorption in each hole.

3, dam according to claim 1 and aqueduct, its further feature is: for the aqueduct that does not install suction water pipe 3 additional, for preventing the damage of stone to the water machine, therefore will assemble protective screening 4, enter aqueduct 2 to stop stone.

4, dam aqueduct according to claim 1 and water machine, its further feature is: because silt may damage aqueduct and water machine to amassing month washing away of base the day of aqueduct 2, so the anti abrasive material of the confidential employing of aqueduct and water.

5, dam aqueduct according to claim 1 and suction water pipe, its further feature is: aqueduct is wanted horizontal positioned with suction water pipe or is become small inclination to place with level, is beneficial to silt and discharges.

6, dam according to claim 1 and aqueduct, its further feature is: stop up protective screening for fear of stone, each face of the protective screening 5 among Fig. 3, Fig. 4 is all made the face at inclination angle.