Electric gate valve
An electric gate valve and valve seat technology, used in gate valves, high-pressure medium conditions, and high-temperature fields, can solve the problems of reduced sealing performance, sealing surface wear, and short service life, and achieve long service life, low friction, and reliable sealing performance. Effect
Active Publication Date: 2018-12-28
GAONENG VALVE ZHEJIANG
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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 gate and the sealing surface of the valve seat, which leads to wear of the sealing surface, rapidly reduces the sealing performance, and shortens the service life of the product
Method used
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Embodiment Construction
[0010] like figure 1 The electric gate valve includes a valve body 11, a valve seat 12, and a gate plate 13. The valve seat 12 is installed on the inlet and outlet channels of the valve body 11 on both sides of the gate plate 13, and the upper end surface of the gate plate 13 is connected to the electric mechanism through a valve stem. The electric mechanism includes a motor M and a transmission mechanism; the outer circular surface of the valve seat 12 is composed of two outer cylindrical surfaces with different diameters, the outer cylindrical surface on the sealing surface side of the valve seat 12 has a larger diameter, and the two outer cylindrical surfaces of the valve seat 12 The surfaces are respectively in dynamic sealing fit with the inner wall of the channel of the valve body 11, and the radial step between the two outer cylindrical surfaces and the radial step of the channel of the valve body 11 form a pressure control chamber 14, which is connected to the pressure ...
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The invention relates to an electric gate valve. The electric gate valve comprises a valve body, a valve seat and a wedge disc, wherein the outer circumferential surface of the valve seat comprises two outer cylindrical surfaces with different diameters; the diameter of the outer cylindrical surface on the sealing surface side of the valve seat is larger than that of the outer cylindrical surface on the other side; each of the two outer cylindrical surfaces with different diameters is in moving sealing fit with the inner wall of a valve passage; the part between the radial step between the two outer cylindrical surfaces with different diameters and that of the valve passage forms a pressure control cavity; the pressure control cavity is connected with a pressure control mechanism through a pressure pipeline; and the pressure control mechanism comprises a piston control mechanism and an electric control circuit. The electric gate valve has the advantages as follows: negative pressure is generated in the pressure control cavity when the valve is opened or closed, the valve seat contracts into the pressure control cavity, the pressure control cavity is injected with pressure after the valve is opened or closed properly, and the valve seat is pushed out of the pressure control cavity to be in compress sealing fit with the wedge disc; therefore the following advantages are achieved: the friction of the sealing surface is small during the valve opening and closing process, the sealing property is reliable, and the service lives of products are long; besides, the electric gate valve is applicable to high temperature and high pressure medium working conditions.
Description
technical field [0001] The invention belongs to the field of valves, in particular to a gate valve. The invention is suitable for working conditions of high temperature and high pressure medium. Background technique [0002] The basic structure of the gate valve includes a valve body, a valve seat, a gate, a valve stem and a transmission mechanism. The valve seat is located at the inlet and outlet passages of the valve body on both sides of the gate, and is pressed and sealed by the planes on both sides of the gate and the valve seat. Its main disadvantages are: during the opening and closing process, there is a large friction force between the gate plate and the sealing surface of the valve seat, which leads to wear of the sealing surface, rapidly reduces the sealing performance, and shortens the service life of the product. Contents of the invention [0003] The purpose of the present invention is to provide an electric gate valve with no friction between the gate plate...
Claims
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IPC IPC(8): F16K31/04F16K31/06F16K31/122
CPCF16K31/04F16K31/0668F16K31/1221
Inventor 应建忠
Owner GAONENG VALVE ZHEJIANG