Electric control plug valve
A cock valve and electric control technology, applied to cocks including cut-off devices, valve devices, mechanical equipment, etc., can solve the problems of reduced sealing performance, short service life, large opening and closing torque, etc., and achieve long service life and high operating pressure. High, small opening and closing torque effect
Active Publication Date: 2018-10-23
永嘉县信诚科技服务有限公司
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Problems solved by technology
Its main disadvantages are: during the opening and closing process, there is a large friction force between the cock body and the sealing surface of the valve body, and the opening and closing torque is large, so that the existing cock valve can only be used for low pressure working conditions, and frequent opening and closing Causes sealing surface wear, rapidly reduces sealing performance, and shortens service life of the product
Method used
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Embodiment Construction
[0010] Such as figure 1 The electric control cock valve includes a valve body 11, a cock body 15, and a valve stem 16. The inlet and outlet channels of the valve body 11 have a valve seat 13 that is tightly matched with the surface of the cock body 15. The end face is fixedly connected, the upper end of the valve stem 16 is connected with the electric mechanism, and the electric mechanism is a motor transmission mechanism; the valve seat 13 is installed in the annular cavity outside the inlet and outlet channels of the valve body 11 with dynamic seal, between the back of the valve seat 13 and the bottom surface of the annular cavity The pressure control chamber 12 is formed, that is, the radially outer circular surface and the inner circular wall of the valve seat 13 respectively cooperate with the outer ring surface and the inner ring surface of the annular cavity on the valve body 11, so that the valve seat 13 can be in the annular cavity. Axial movement, the pressure contro...
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The invention relates to an electric control cock valve comprising a valve body, a cock body and a valve rod. The electric control cock valve is mainly characterized in that a valve seat is mounted in an annular cavity in the outer side of an inlet-outlet channel of the valve body in a motive seal mode; a pressure control cavity is formed between the back face of the valve seat and the bottom face of the annular cavity and connected with a pressure control mechanism through a pressure channel; the pressure control mechanism is composed of a piston control mechanism and an electrical control circuit; under control of the pressure control mechanism, the negative pressure is generated in the pressure control cavity when the valve is opened or closed, and the valve seat is made to contract into the pressure control cavity; and after the valve is opened or closed in place, the pressure is injected into the pressure control cavity, and the valve seat is pushed out of the pressure control cavity to be in compressed seal fit with the cock body. The electric control cock valve has the characteristics of small open-close torque, reliable sealing performance, long service life of a product, high using pressure and the like, and is applied to the high-pressure medium working condition.
Description
technical field [0001] The invention belongs to the field of valves, in particular to a plug valve. The invention is suitable for working condition of high-pressure medium. Background technique [0002] The basic structure of the cock valve includes a valve body, a cock body, a valve stem and a transmission mechanism. The cock body has a square channel. It is connected with the upper end surface of the cock body to realize 90°rotation of the cock body. It has the advantages of simple structure, convenient opening and closing, and small flow resistance. Its main disadvantages are: during the opening and closing process, there is a large friction force between the cock body and the sealing surface of the valve body, and the opening and closing torque is large, so that the existing cock valve can only be used for low pressure working conditions, and frequent opening and closing It will lead to wear of the sealing surface, rapidly reduce the sealing performance, and shorten th...
Claims
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Login to View More IPC IPC(8): F16K5/02F16K5/16
CPCF16K5/02F16K5/16
Inventor 应建忠
Owner 永嘉县信诚科技服务有限公司