CN214168977U

CN214168977U - System for automatically opening tail gate of hydropower station through flat pressure

Info

Publication number: CN214168977U
Application number: CN202022346891.XU
Authority: CN
Inventors: 葛曦; 苏艳菲; 林琦; 张小泳; 朱晔
Original assignee: Guizhou Water Investment Group Co ltd
Current assignee: Guizhou Water Investment Group Co ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-09-10
Anticipated expiration: 2030-10-21

Abstract

The utility model provides an automatic system of power station tail gate is opened to concora crush, including the water pipe, the water pipe is pre-buried in the tail gate mound of power station to lead the water in low reaches tail water river course to the machine mound wall in the power station factory building and link to each other with the hydraulic turbine tail pipe, still set up service valve and electric butterfly valve on the water pipe. The problems that the existing method adopts the upper opening of the gate to increase the water leakage point of the gate, the sealing and the structure of the opening are required to be processed, the water energy resource is wasted by adopting the water diversion flat pressure from the upstream volute, and the pressure reduction is required if the water head of the power station is higher are solved. Belongs to the technical field of automatic control of hydropower stations.

Description

System for automatically opening tail gate of hydropower station through flat pressure

Technical Field

The utility model relates to a system for automatic concora crush opens power station tail gate belongs to power station automatic control technical field.

Background

The water turbine generator set draft tube maintenance gate is used for blocking downstream draft water so as to facilitate installation and maintenance of corresponding parts such as a water turbine, a draft tube and the like, and the gate is generally opened and closed in still water.

The tail water inspection gate is generally a plane sliding gate and is provided with corresponding opening and closing equipment, and when the tail water inspection gate works under a designed water head, the tail water pressure is borne, so that the tail water gate is filled with water horizontally, water is guided from the tail water direction generally, and a water filling valve can be arranged on a door or a bypass valve for water filling is arranged on a side wall. Some projects adopt water diversion flat pressure from an upstream volute.

The calculation of the opening and closing force of the gate needs to consider the frictional resistance caused by a certain water level difference besides the self weight of the gate, the water level difference of not more than 1m can be adopted for the open-top gate, and the water level difference of 1-5 m can be adopted for the down-the-hole gate.

Under normal operation flow, the unit overhauls the back, and the tail gate need be opened, does not have water in the tail water pipe this moment, and pressure is little, and tail gate downstream side water level is higher, and pressure is big, is far away from the requirement that the open and close water head that is not more than 1m of prescribed formula gate of exposing to the top, just can open the tail gate after needing the concora crush, and the tail water of gate low reaches can be through flowing into the tail water pipe certainly.

Conventionally, the tail water gate is provided with an opening, and is communicated with the downstream, or the water is led from the upstream volute to be compressed. However, if the opening is formed in the gate, the water leakage point of the gate is increased, and the sealing and structure of the opening are required to be well treated. If the water is led from the upstream volute to be flat-pressed, water energy resources are wasted, and meanwhile, pressure reduction is needed if the water head of the power station is high.

Disclosure of Invention

The utility model provides an automatic system of power station tail gate is opened to concora crush to solve current method and adopt the trompil on the gate can increase the water leakage point of gate, need handle the sealed and structure of trompil department, and adopt from upper reaches spiral case diversion concora crush, then wasted the hydroenergy resource, if the higher still need decompression scheduling problem of power station flood peak simultaneously.

In order to solve the problems, the system for automatically opening the tail gate of the hydropower station by flat pressure comprises a water pipe, wherein the water pipe is embedded in a tail gate pier of the hydropower station in advance so as to lead water in a downstream tail water river channel to a machine pier wall in a hydropower house and be connected with a tail water pipe of a water turbine, and a maintenance valve and an electric butterfly valve are further arranged on the water pipe.

The system also comprises a pressure difference sensor and a controller, wherein the maintenance valve and the electric butterfly valve are arranged on a water pipe in a hydropower station workshop;

the trompil on the tail gate is adopted in present power station more, connects the low reaches tail water river course with hydraulic turbine draft tube and carries out the water intaking flat pressure and open the tail gate, and the trompil produces the influence to the structure of gate on the gate, need strengthen the processing to the gate part, need seal the processing to the hole of newly opening simultaneously, prevents to increase new water leakage point. Moreover, some small hydropower stations directly adopt a mode of operating a small opening degree to open a tail water gate to fill water and level pressure, so that the gate and opening and closing equipment are easily seriously damaged, and meanwhile, great hidden danger is brought to safe operation of the hydropower stations. Compared with the prior art, the utility model discloses a pipeline arrangement causes the draft tube with the tail water in low reaches tail water river course at the other tail water gate mound of tail water gate, adopts pressure differential sensor automatic control electric butterfly valve to open the concora crush, and is equipped with the service valve as safety protection, has the advantage of arranging simple, the operation of being convenient for, intelligent control.

Drawings

Fig. 1 is a schematic sectional structure of the present invention;

fig. 2 is a sectional view taken along the line a-a in fig. 1.

Detailed Description

To further clarify the objects, technical solutions and advantages of the present invention, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings.

Examples

Referring to fig. 1 and 2, the embodiment provides a system for opening a tail water gate of a hydropower station by automatic flat pressing, which comprises a water pipe 2, wherein the water pipe 2 is pre-embedded in a gate pier of the tail water gate 1 of the hydropower station so as to guide water of a downstream tail water river channel to a machine pier wall in the hydropower station workshop and be connected with a tail water pipe 5 of a water turbine, the water pipe 2 is also provided with an inspection valve 3 and an electric butterfly valve 4, the inspection valve 3 and the electric butterfly valve 4 are both arranged on the water pipe 2 in the hydropower station workshop, two pressure difference sensors 6 are respectively arranged on the water pipe 2 at the upstream section and the downstream section of the inspection valve 3 and the electric butterfly valve 4, and the pressure difference sensor 6 and the electric butterfly valve 4 are both connected with a controller 7;

the automatic flat pressing method comprises the following steps:

when a hydroelectric generating set needs to be overhauled in a hydropower station, the tail water gate 1 is closed, when the hydroelectric generating set is overhauled, water in the tail water pipe 5 needs to be emptied so that an maintainer can enter the tail water pipe 5 for operation and overhaul, generally, the water is emptied through a disc valve arranged on the tail water pipe, after the overhaul is completed, the tail water gate 1 needs to be opened, no water exists in the tail water pipe 5 at the moment, the pressure is low, the water level of a river channel at the downstream side of the tail water gate 1 is higher and higher than the pressure and is far greater than the requirement that the specified open-close type gate is not more than 1m of water level difference, therefore, the tail water gate 1 can be opened after the flat pressure is required, river water at the downstream of the tail water gate 1 can enter the tail water pipe 5 through self-flowing, the water pipe 2 is pre-buried in a gate pier of the tail water gate 1 of the hydropower station, the water pipe 2 is connected with the tail water turbine 5, and the downstream river water is communicated with the water turbine tail water turbine 5, set up service valve 3 and electric butterfly valve 4 on water pipe 2, service valve 3 is manual valve, the butterfly valve that has the shutoff rivers, the gate valve is all can, during the maintenance, service valve 3 closes, after the maintenance finishes, service valve 3 opens, electric butterfly valve 4 opens and closes through controller 7 control, when reaching the instruction of opening electric butterfly valve 4, when detecting two valve front and back pressure differentials through pressure differential sensor 6 and being greater than 1m water head, then controller 7 control electric butterfly valve 4 carries out the opening order, the rivers get into hydraulic turbine draft tube 5 through water pipe 2 and carry out the concora crush, when pressure differential sensor 6 records that pressure differential equals 0m water head around two valves then controller 7 control electric butterfly valve 4 closes, accomplish the concora crush.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an automatic concora crush opens system of power station tail gate which characterized in that: including water pipe (2), water pipe (2) are pre-buried in the tail water gate (1) the gate pier of power station to cause the water in low reaches tail water river course the machine mound wall in the power station factory building and link to each other with hydraulic turbine draft tube (5), still set up maintenance valve (3) and electric butterfly valve (4) on water pipe (2), still including differential pressure sensor (6) and controller (7), maintenance valve (3) and electric butterfly valve (4) all set up on water pipe (2) in the power station factory building, and two differential pressure sensor (6) set up respectively on water pipe (2) of maintenance valve (3) and electric butterfly valve (4) upper reaches section and lower reaches section, and differential pressure sensor (6) and electric butterfly valve (4) all link to each other with controller (7).