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Stop valve

A globe valve and disc technology, applied in the field of globe valves, can solve problems such as the relative axial movement of the valve stem and the valve disc, and the insufficient connection between the valve stem and the valve disc, so as to achieve good sealing effect, firm positioning and high manufacturing efficiency Effect

Active Publication Date: 2014-08-27
ZHEJIANG DABLIN VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the valve stem and the disc of the above two stop valves are fixedly connected by a threaded structure. After a long time of use, the valve stem and the valve disc are prone to relative axial movement, which makes the connection between the valve stem and the valve disc not firm enough.

Method used

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Embodiment Construction

[0027] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] Such as figure 1 and 2 As shown, a shut-off valve includes a valve body 1, a valve disc 2 and a valve stem 3. The outer end of the valve stem 3 protrudes from the valve body 1 and is connected with a handle 4. The valve disc 2 is in the shape of a sheet, and the valve stem 3 The inner end of the valve disc 2 has a shoulder 3b, and the upper side of the valve disc 2 has a protruding and cylindrical connecting portion 2a, the shoulder 3b is located in the connecting portion 2a, and the upper end of the connecting portion 2a is a bending portion 2d bent inward. , the upper end surface of the shoulder 3b matches the bent portion 2d and the bent portion 2d can abut against the upper end surface of the shoulder 3b, the lower e...

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Abstract

The invention provides a step valve, and belongs to the technical field of valves. The problem that connection between a valve rod and a valve clack of an existing stop valve is not firm enough is solved. The stop valve comprises a valve body, a valve clack and a valve rod, wherein the outer end of the valve rod extends out of the valve body and is connected with a handle, the valve clack is of a sheet shape, the inner end of the valve rod is provided with a protruding shoulder, the upper side face of the valve clack is provided with a protruding cylindrical connecting portion, the protruding shoulder is located in the connecting portion, the upper end of the connecting portion is provided with a bent portion which is bent inwards, the bent portion can abut against the upper end face of the protruding shoulder, and a sealing gasket is positioned on the lower side of the valve clack. The stop valve has the advantage that connection between the valve rod and the valve clack is firm.

Description

technical field [0001] The invention belongs to the technical field of valves and relates to a stop valve. Background technique [0002] Globe valve is the most widely used valve. Its structure includes valve body, valve cover, valve stem, valve core seat, bracket, valve stem driving mechanism, packing and other components. The valve body is equipped with inlet and outlet ports. , A horizontal communication port is set between the inlet and outlet ports, the valve core seat is installed on the valve stem, and the valve stem is lifted or lowered vertically to open the communication port or close the communication port to open and close the valve. [0003] For example, a double hard seal stop valve [application number: 01249205.1; authorized announcement number: CN 2494901Y] proposed in Chinese patent documents, including valve body, valve seat, valve cover, valve stem and transmission device, the valve core sealing pair is composed of Composed of upper and lower sealing ring...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K1/36F16K1/48F16K27/08
CPCF16K1/00F16K1/36F16K1/48F16K27/08F16K41/02
Inventor 林海林李响林李进盛
Owner ZHEJIANG DABLIN VALVE CO LTD
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