Feedback self-operated reducing valve of water-turbine generator set

A self-operated pressure reducing valve, generator set technology, applied in the direction of engine components, safety valves, balance valves, etc., can solve the problems of limited application scope, large installation volume, and many structural components, and achieve good economic and social benefits and installation volume. Small, small size effect
CN103335142AActive Publication Date: 2013-10-02湖南力能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖南力能科技有限公司
Publication Date
2013-10-02

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Abstract

The invention relates to a feedback self-operated reducing valve of a water-turbine generator set. The feedback self-operated reducing valve mainly comprises a valve cover (1), a valve seat (2), a tower-shaped spring (3) and a valve rod (4), wherein a water inlet channel and a water outlet channel which are separated mutually are formed in the valve seat (2); the valve rod (4) is a cylinder, and a hollow through-bottom pipeline is arranged at the lower section of the cylinder; a side hole (20) is formed in the lower middle part of the valve rod (4) and communicated with the hollow through-bottom pipeline; the valve rod (4) sequentially penetrates through an upper spring seat (16), the tower-shaped spring (3), a lower spring seat (17), a rubber drumhead (15), a large piston (13), an isolation board (14) and a small piston (12) from top to bottom, and the lower end is sleeved with a throttling cone (19); and the side hole (2) is formed in a feedback pressure compensation space between the large piston (13) and the isolation board (14). The feedback self-operated reducing valve is arranged at an outlet of a turbine runner and can adapt to substantial water pressure change, the stability of the water outlet pressure is good, the installation size is small, and the reducing valve has good anti-pollution capacity.
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Description

technical field

[0001] The invention belongs to hydropower engineering equipment, in particular to a feedback self-operated decompression valve of a hydroelectric generating set. Background technique

[0002] Some of the hydropower stations that have been built now include: Gezhouba Hydropower Station, Hunan Shuifumiao Hydropower Station, Anren Dashi Hydropower Station, Mayang Majingao Hydropower Station, Hongyan Hydropower Station and Syria Dishlin Hydropower Station designed by Northwest Survey and Design Institute. Due to the change of the water head, the water pressure supplied to the hydro-generator set fluctuates, and at least causes the runner chamber-draft pipe section to produce anti-water hammer, the generator set continues to rotate under the action of inertia, and the water turbine is changed from the working mode of the water turbine to the working mode of the water pump. In the worst case, the blades of the water turbine push the water to the tail water, and th...

Claims

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