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Piston energy-dissipation-type pressure balance chamber

A surge chamber, piston-type technology, used in water conservancy projects, hydroelectric power stations, hydroelectric power generation, etc., can solve the problems of high geological and terrain conditions and high operating costs, improve work stability, reduce construction costs and operating costs. , the effect of reducing head loss

Inactive Publication Date: 2014-10-22
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 1973, Driva Power Station in Norway used an air-cushion surge chamber, which brought the development and research of the surge chamber into a new stage. However, the air-cushion surge chamber has high requirements for geological and topographical conditions, and the later operation costs are high.

Method used

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  • Piston energy-dissipation-type pressure balance chamber
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  • Piston energy-dissipation-type pressure balance chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: The first type of piston energy-dissipating surge chamber. see first figure 1 , Between the upstream reservoir 17 and the downstream reservoir 20, a pressure channel 1, a pressure regulating chamber 2, a pressure pipeline 18 and a hydroelectric generator 19 are sequentially arranged. see you again figure 2 , the surge chamber 2 is located in the area between the downstream of the pressure water channel 1 and the upstream of the pressure pipe 18 . The surge chamber 2 is a cylindrical structure, and the water level 6 in the surge chamber is higher than the water level of the pressure water channel 1 . A piston-type water blocking plate 4 is matched and installed in the pressure regulating chamber 2, and a friction pad 10 can be arranged on the edge thereof, so that friction can be generated on the wall of the pressure regulating chamber. In addition, a guide hole and a guide tube 9 are set in the center of the piston-type water blocking plate 4. The guid...

Embodiment 2

[0036] Embodiment 2: The content is basically the same as that of Embodiment 1. The difference is that on the basis of Embodiment 1, a frictional water blocking plate is adopted. No matter whether the ratio of the density of the piston type water blocking plate 4 to the water density is greater than 1, the A friction pad 10 can be arranged on the edge of the piston water blocking plate 4 to generate friction with the inner wall of the pressure regulating chamber 2, and when the piston type water blocking plate 4 moves, friction occurs with the wall of the water chamber to dissipate energy. Of course, it is also possible to simultaneously cooperate with the piston-type water blocking plate 4 to dissipate energy by its own weight through friction.

Embodiment 3

[0037]Embodiment 3: Another piston energy dissipation type surge chamber. On the basis of Embodiment 1, a significant improvement is made: a friction pad 10 is provided on the edge of the piston-type water blocking plate 4, wedge-shaped friction blocks 11 are evenly distributed on the outer edge of the friction pad 10, and a matching pad is provided on the inner wall of the pressure regulating chamber 2 at the same height. The lower fixed friction block 12, the gap width between the lower fixed friction block 12 is adapted to the width of the wedge-shaped friction block 11. Upper fixed friction blocks 13 are arranged right above each lower fixed friction block 12 , and the gap width between the upper fixed friction blocks 13 is adapted to the width of wedge-shaped friction blocks 11 . The upper end of the lower fixed friction block 12 gradually converges and narrows, and the lower end of the upper fixed friction block 13 gradually converges and narrows, thereby forming a relea...

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PUM

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Abstract

The invention discloses a piston energy-dissipation-type pressure balance chamber. A piston-type water stopping board is installed in the pressure balance chamber in a matched mode. A guide rod is installed in a center guide hole and a guide pipe in the piston-type water stopping board in a matched mode. The upper end and the lower end of the guide rod are fixed to the center of an upper support frame and the center of a lower support frame respectively. An impedance hole is formed in the piston-type water stopping board. According to the novel pressure balance chamber on the basis of a simple pressure balance chamber and an impedance pressure balance chamber, head loss of the connection portion of the pressure balance chamber and a water guide duct is reduced, the amplitude of water level fluctuation of the pressure balance chamber is reduced, the capacity of the pressure balance chamber is reduced, the manufacturing cost is reduced, operation cost is reduced, and the safety and economical efficiency of engineering are improved. According to the piston-type water stopping board, unstable fluctuation can be eliminated through the dead load and friction of the pipe wall, and therefore the working stability of a water guide duct and pressure balance chamber system is improved.

Description

technical field [0001] The invention relates to the improvement technology of a surge chamber in the technical field of water conservancy engineering, and specifically designs a piston energy-dissipating type surge chamber. Background technique [0002] The surge chamber is generally a flat-pressure structure built at the junction of the pressure diversion channel of the hydropower station and the high-pressure pipeline, which can cause the water shock wave to reflect, which can prevent the water shock wave from propagating into the pressure diversion channel and reduce the pressure in the high-pressure pipeline. The water hammer value can improve the operating conditions of the unit when the load of the hydropower station changes. Therefore, the surge chamber is a building that cannot be ignored in the construction of hydropower stations. However, the surge chamber is a building with large volume, high construction technology requirements and high cost, which accounts for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B9/06
CPCY02E10/20
Inventor 丁泽霖张多新张泽中王婧
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER