High-oil-pressure and large-drift-diameter combined reversing valve for electric high-voltage switch hydraulic mechanism

Abstract

The invention relates to a reversing valve, in particular to a high-oil-pressure and large-drift-diameter combined reversing valve for an electric high-voltage switch hydraulic mechanism. The reversing valve comprises a valve body 10, an end cover 11, a valve core 6, a valve body oil way channel and a valve body auxiliary mechanism, and is characterized in that the valve body auxiliary mechanism is an electromagnetic pilot valve, which is mounted on the valve body 10, is respectively communicated with a port O, a port P and a cavity M on the valve body 10 through oil ways, and outwards stops an oil ways on the valve body 10 through a ball plug 4; a short valve sleeve 5, a valve core 6 and a long valve sleeve 7 are arranged in an inner cavity of the valve body 10, and are sealed in the inner cavity of the valve body 10 through the end cover 11; the fit between all the valve sleeves and the valve body 10 is inlaid fit and sealing through a sealing piece 9; and the valve core 6 horizontally moves in inner cavities of the long and short valve sleeves (5, 7). The reversing valve has the following advantages: because of the innovated design of the internal structure of the valve body, the reversing valve becomes the combined reversing valve capable of adapting to high oil pressure of 60 Mpa, changing a conversion port to high drift diameter and enabling the conversion speed to reach the millisecond level.

Description

technical field [0001] The invention relates to a hydraulic direction control valve element, in particular to a high oil pressure and large diameter combined reversing for an electric high pressure switch hydraulic mechanism. Background technique [0002] In the prior art, the maximum working oil pressure of hydraulic reversing control valves for engineering is usually 31.5Mpa, the oil flow diameter is less than 10mm, and the switching time of reversing control is greater than 15ms, which cannot be applied to high-power hydraulic pressure for high-voltage or ultra-high-voltage switches in power systems. The operating mechanism requires the use of hydraulic control with high oil pressure and large diameter. After searching, there are 5 national patent applications for combined reversing valves, 1 invention patent and 4 utility models, all of which do not involve the structure of high oil pressure and large diameter. Such as the patent No. is 201220089368.6 combined reversing...

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Problems solved by technology

For example, the patent No. 201220089368.6 combined reversing valve is only to solve the problems of complex oil circuit and loose structure in the prior art.

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