CN209907345U

CN209907345U - Pressure diversion type power station pipeline pressure-resistant device

Info

Publication number: CN209907345U
Application number: CN201920050921.7U
Authority: CN
Inventors: 刘晓嫚; 闫毅志; 苏志敏; 邵维志; 沈智敏
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2019-01-14
Filing date: 2019-01-14
Publication date: 2020-01-07
Anticipated expiration: 2029-01-14

Abstract

The utility model discloses a pressure diversion type power station pipeline pressure-resistant device, which belongs to the field of hydraulic engineering and comprises an upstream reservoir, a diversion tunnel, a surge shaft, a pressure water pipe, a main transformer and an underground workshop, a main transformer and a water turbine are arranged in the underground plant, the upstream reservoir is communicated with the water inlet of the diversion tunnel, the water outlet of the diversion tunnel is communicated with the pressure water pipe, the penstock is communicated with the water inlet of the water turbine of the underground plant, the surge shaft is positioned between the diversion tunnel and the penstock, the utility model is characterized in that a pressure pipeline valve is arranged at the communication position of the pressure water pipe and the water inlet of the water turbine of the underground plant, the utility model solves the problems of cavitation erosion and cavitation damage of the pressure pipeline caused by overlarge water hammer pressure in the pressure diversion type power station, and strong vibration and even pipeline burst which are easily generated by water flow instability have better practicability.

Description

Pressure diversion type power station pipeline pressure-resistant device

Technical Field

The utility model relates to a there is diversion formula power station pipeline resistance to compression device that presses belongs to hydraulic engineering technical field.

Background

In the pressure pipeline, the flow rate of water is suddenly changed due to the sudden closing of a valve or the sudden stop of a water pump unit, which is called water hammer. Water hammer in pressure pipe systems is a typical pressure pipe unsteady flow problem. The pressure rise caused by the water hammer can reach dozens of times or even hundreds of times of the normal working pressure of the pipeline. In addition, a negative pressure can occur in the tube. The pressure fluctuation can cause the strong vibration of the pipeline system, the noise, the valve damage, the pipe joint rupture, the disconnection, even the pipeline burst and other serious accidents.

Disclosure of Invention

An object of the utility model is to provide a there is diversion formula power station pipeline resistance to compression device that presses, the utility model discloses the device has solved under the effect of high-speed rivers, under the condition of the sudden failure of hydraulic turbine or the sudden emergency shutdown of pipeline under pressure valve, the problem of the equipment damage on the pipeline under pressure that the water hammer pressure caused greatly and the pipeline.

The technical scheme of the utility model is that: the utility model provides a there is diversion formula power station pipeline resistance to compression device, includes upper reaches reservoir, diversion tunnel, surge shaft, penstock, main transformer, secret factory building, be equipped with main transformer and hydraulic turbine in the secret factory building, the water inlet intercommunication of upper reaches reservoir and diversion tunnel, the delivery port and the penstock intercommunication of diversion tunnel, the water inlet intercommunication of penstock and the hydraulic turbine of secret factory building, the surge shaft is located between diversion tunnel and the penstock, penstock and the intercommunication department installation penstock valve of the water inlet of the hydraulic turbine of secret factory building.

The pipeline under pressure valve is the check valve, and the valve plate of check valve is tooth's socket shape, and under the effect of high-speed rivers, when promptly closing the pipeline under pressure valve suddenly, the rivers energy is concentrated and can be produced huge water pressure, and the valve plate that is equipped with unevenness's tooth's socket of pipeline under pressure valve just can offset above-mentioned water pressure to alleviate the destruction that water hammer effect produced equipment on the pipeline, fine protection factory building hydraulic turbine, the effect of offsetting pressure on the great pipeline under pressure of pipe diameter is more obvious.

And the pressure pipeline valve is welded with the pressure water pipe.

The main transformer is electrical equipment for converting electric energy, and can convert alternating current electric energy of one voltage and current into alternating current electric energy of another voltage and current with the same frequency; when the hydropower station carries out long-distance transmission, the electric energy loss on a line can be reduced by increasing the voltage; when the power supply reaches a use area, the voltage is reduced, so that the power consumption requirements of different users can be met; when impedance matching is carried out, the transformer connection is used for changing impedance; the isolation transformer can be used for electrically isolating two phases to prevent electric shock accidents.

The working principle of the utility model is as follows:

the water inlet of diversion tunnel is introduced with water to the upper reaches reservoir, flow into in the penstock through the diversion tunnel, set up a surge shaft between diversion tunnel and penstock, then flow to the underground factory building at last through the penstock, be equipped with the hydraulic turbine in the underground factory building, the penstock installs the pipeline under pressure valve with the intercommunication department of the water inlet of the hydraulic turbine of underground factory building, when the pipeline under pressure valve breaks down or needs the urgent shutoff pipeline under pressure valve, because pipeline under pressure valve plate makes rugged fluted shape, water pressure all is the perpendicular to working face, so pipeline under pressure valve plate can offset effectively because of the huge water pressure that the gate closed production.

The utility model has the advantages that: the utility model provides an in having pressure diversion formula power station, the pipeline under pressure is because cavitation that the water hammer pressure is too big produces loses and cavitation destroys to and the strong vibrations that rivers unstability produced easily pipeline bursts even, has better practicality.

Drawings

Fig. 1 is a schematic overall layout of the present invention;

fig. 2 is a schematic view of the installation positions of the pressure water pipe and the pressure pipeline valve of the present invention;

fig. 3 is a front view of the pressure water pipe valve of the present invention;

fig. 4 is a schematic structural view of a pressure water pipe valve plate of the present invention;

the reference numbers in the figures: 1-an upstream reservoir, 2-a water inlet, 3-a diversion tunnel, 4-a surge shaft, 5-a pressure water pipe, 6-a pressure pipeline valve, 7-a main transformer, 8-an underground workshop and 9-a tooth groove shape.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Embodiment 1 as shown in fig. 1 ~ 4, the pressure diversion type power station pipeline pressure resistance device comprises an upstream reservoir 1, a diversion tunnel 3, a surge shaft 4, a penstock 5, a main transformer 7 and an underground factory building 8, wherein the main transformer 7 and a water turbine are arranged in the underground factory building 8, the upstream reservoir 1 is communicated with a water inlet 2 of the diversion tunnel 3, a water outlet of the diversion tunnel 3 is communicated with the penstock 5, the penstock 5 is communicated with a water inlet of the water turbine of the underground factory building 8, the surge shaft 4 is positioned between the diversion tunnel 3 and the penstock 5, a penstock valve 6 is arranged at a communication position of the penstock 5 and the water inlet of the water turbine of the underground factory building 8, the penstock valve 6 is a check valve, a valve plate of the check valve is in a tooth-groove shape 9, and the penstock 6 is welded with the penstock 5.

The utility model discloses a working process is: the water inlet 2 of diversion tunnel 3 is introduced with water to upper reaches reservoir 1, in 3 flows into penstock 5 through diversion tunnel, set up a surge shaft 4 between diversion tunnel 3 and penstock 5, then flow to underground factory building 8 at last through penstock, be equipped with the hydraulic turbine in the underground factory building 8, penstock 5 installs pipeline under pressure valve 6 with the intercommunication department of the water inlet of the hydraulic turbine of underground factory building 8, when pipeline under pressure valve trouble perhaps needs promptly to close pipeline under pressure valve, because pipeline under pressure valve plate makes unevenness's flute profile 9, water pressure all is the perpendicular to action plane, so pipeline under pressure valve plate can offset effectively because of the huge water pressure that the gate closed the production.

The utility model provides an in having pressure diversion formula power station, the pipeline under pressure is because cavitation that the water hammer pressure is too big produces loses and cavitation destroys to and the strong vibrations that rivers unstability produced easily pipeline bursts even, has better practicality.

The present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. The utility model provides a there is diversion formula power station pipeline compression resistance device, its characterized in that, includes upper reaches reservoir (1), diversion tunnel (3), surge shaft (4), pressure water pipe (5), main transformer (7), secret factory building (8), be equipped with main transformer (7) and hydraulic turbine in secret factory building (8), upper reaches reservoir (1) and water inlet (2) the intercommunication of diversion tunnel (3), the delivery port and pressure water pipe (5) the intercommunication of diversion tunnel (3), pressure water pipe (5) and the water inlet intercommunication of the hydraulic turbine of secret factory building (8), surge shaft (4) are located between diversion tunnel (3) and pressure water pipe (5), pressure water pipe (5) and intercommunication department installation pressure pipeline valve (6) of the water inlet of the hydraulic turbine of secret factory building (8).

2. The pressure resistant device for the pressurized water diversion type power station pipeline according to claim 1, characterized in that: the pressure pipeline valve (6) is a check valve, and a valve plate of the check valve is in a tooth socket shape (9).

3. The pressure resistant device for the pressurized water diversion type power station pipeline according to claim 1, characterized in that: the pressure pipeline valve (6) is welded with the pressure water pipe (5).