Opening and closing mechanism of small-torque regulation valve and cut-off valve
A technology of opening and closing mechanism and regulating valve, which is applied in the direction of lifting valve, valve device, mechanical equipment, etc. It can solve the problems of valve seat falling off, reducing the area bearing the pressure of the medium inlet, reducing the opening and closing torque of the valve, etc., to achieve increased Long service life, simple connection method, and the effect of reducing manufacturing costs
Inactive Publication Date: 2015-09-09
海林阀门科技河北有限公司
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- Application Information
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Problems solved by technology
[0007] The present invention aims to realize an operating mechanism that can greatly reduce the area that bears the pressure at the inlet of the medium, thereby reducing the opening and closing torque of the valve, and solve the bottleneck that the regulating valve and stop valve manufacturer must be equipped with an actuator when producing large-diameter valves, and the valve Technical problem with seat falling off
Method used
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Embodiment Construction
[0027] exist figure 1 Among them, the copper sleeve [16], valve seat [14], hexagonal cone end set screw [15] are installed on the valve body [1] in sequence, the gasket [13], valve stem nut [12], valve stem [8], diaphragm [5], washer [9], and lock nut [7] are sequentially connected to the valve clack [11] to form a valve clack assembly, the valve clack assembly is connected to the bracket [6], T-shaped key [10] , sealing ring [4], and valve cover [3] are loaded into the valve body [1] in order, and pressed on the valve body [1] with several hexagon socket head cap screws [2]. In the figure, a is the direction of the medium inlet.
[0028] figure 2 Indicates that in the opening and closing mechanism of the small torque regulating valve and the globe valve, the disc is in the open state.
[0029] image 3 Indicates that in the opening and closing mechanism of the small torque regulating valve and the globe valve figure 2 In the enlarged view of b, c in the figure represent...
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The invention relates to a mechanism for controlling opening and closing of a regulation valve and a cut-off valve of a fluid medium and belongs to the field of fluid control valves. A cylindrical cylinder body is designed above a valve clack, a cylindrical support which is fixed relative to a valve body is designed below a valve cover, a membrane is arranged above the cylinder body and the support, the inner diameter portion of the membrane is compressed on the cylinder body through a lock nut, the outer diameter portion of the membrane is compressed on the valve body and the support, and a closed empty chamber is formed between the valve cover and the membrane so as to isolate the medium pressure on the bilateral sides of the membrane. A channel is designed in one valve clack side for bearing a high pressure medium and the other valve clack side for bearing a low pressure medium to enable the high pressure medium to enter the empty chamber through the channel and the lower side and the empty chamber form a communicating vessel structure and namely that the pressure of the empty chamber is equal to the pressure of the high pressure medium side. Accordingly, the pressure in the empty chamber is applied to the end surface area of the support, the end surface area of the support and the most of the area of the pressure of the lower side are offset each other, and accordingly the opening and closing torque of the valve is greatly reduced.
Description
technical field [0001] The invention relates to an opening and closing mechanism for controlling a regulating valve and a shut-off valve for a fluid medium, and belongs to the field of fluid control valves. Background technique [0002] In the field of fluid medium control valves, regulating valves and globe valves are forced-sealing valves. When the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the valve disc, the resistance that the operating force needs to overcome is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve should be large, otherwise the failure of the valve stem to bend will occur; [0003] The torque of regulating valve and globe valve (hereinafter referred to as: valve) ref...
Claims
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Login to View More IPC IPC(8): F16K1/02F16K1/38
CPCF16K1/02F16K1/38
Inventor 迟晓光沈令钧白锋马孟杰刘俊立
Owner 海林阀门科技河北有限公司