Comprehensive method for anticavitation of ultrahigh water head ship lock valve higher than 40m

A comprehensive method and valve technology, applied in ship locks, ship lifting devices, buildings, etc., can solve problems such as increased project investment, inconvenient maintenance and maintenance of water delivery system corridors, etc., to reduce mainstream flow velocity, increase energy dissipation effect, reduce The effect of cavitation strength

Active Publication Date: 2012-01-18
NANJING HYDRAULIC RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve the falling sill cavitation, the project generally adopts steel plate lining for protection, and the sudden expansion of the sill cavitation problem is solved by selecting a complex rising s

Method used

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  • Comprehensive method for anticavitation of ultrahigh water head ship lock valve higher than 40m
  • Comprehensive method for anticavitation of ultrahigh water head ship lock valve higher than 40m

Examples

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Embodiment 1

[0019] This embodiment is a comprehensive method for anti-aircraft of ship lock valves with super high water head above 40m, such as figure 1 As shown, including the water delivery valve 7, the bottom of the corridor behind the water delivery valve 7 is provided with a bottom step-shaped sudden expansion 1, and the top of the corridor behind the water delivery valve 7 is provided with a diagonal line sudden expansion 2, and a diagonal line sudden expansion 2 Use an upward sloping oblique line to connect with the rear corridor; set a stepped drop sill 3 at the entrance of the bottom step-shaped sudden expansion 1 and arrange a drop-sill ventilation pipe 4; set a stepped riser 5 and arrange it at the exit of the bottom step-shaped sudden expansion 1 The elevation 8 of the outlet corridor of the water delivery valve 7 is higher than the bottom elevation 9 of the entrance corridor; the lintel ventilation pipe 10 is arranged at the lintel of the water delivery valve 7; At the back ...

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Abstract

The invention relates to a ship lock valve anticavitation technology, and in particular relates to a comprehensive method for anticavitation of an ultrahigh water head ship lock valve higher than 40m. The invention comprises a water delivery valve, wherein the bottom of the rear gallery of the water delivery valve is downward provided with a bottom stepped sudden expansion, the top of the rear gallery of the water delivery valve is upward provided with an oblique line sudden expansion, and the oblique line sudden expansion is connected with the rear gallery by adopting an upward oblique line;a stepped drop sill and a drop sill vent pipe are arranged at the inlet of the bottom stepped sudden expansion; a stepped booster baffle and a booster baffle vent pipe are arranged at the outlet of the bottom stepped sudden expansion; the outlet gallery bottom elevation of the water delivery valve is higher than the inlet gallery bottom elevation; a door header vent pipe is arranged at a door header of the water delivery valve; and the oblique line sudden expansion is provided with a vent pipe. In the invention, active prevention and passive prevention are combined, the problem of cavitation of a high water head ship lock valve can be effectively solved, and the advantages of simplicity in construction, low investment and convenience in maintenance can be realized.

Description

technical field [0001] The invention relates to a technology for anti-cavitation of ship lock valves, in particular to a comprehensive method for anti-cavitation of ship lock valves with a water head above 40m. Background technique [0002] The ship lock is an important building type that solves the water conservancy and hydropower projects built by ships passing through the river (lake), and realizes smooth navigation along the entire line up and down the river. When the head of the ship lock exceeds 20 meters, it will bring a series of high-speed water flow problems, which will bring great harm to the project, especially the cavitation cavitation problem of the valve and its corridor section is the most prominent, which is directly related to the ship lock. safe and normal operation. Therefore, the cavitation problem in the valve section of the ship lock water delivery system has always been an important key technical difficulty in the single technical design of the ship ...

Claims

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Application Information

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IPC IPC(8): E02C1/08
Inventor 胡亚安李云严秀俊李中华刘本芹薛淑李君
Owner NANJING HYDRAULIC RES INST
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