Check valve

A globe valve and valve body technology, applied in the field of globe valves, can solve problems such as time-consuming and labor-consuming, valve stem 2′ flying out, improper assembly, etc., and achieve the effect of reducing material costs and process costs

Inactive Publication Date: 2017-07-28
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The top of the valve body 1' is connected to the bonnet 4' by threading, so every time the valve stem 2' needs to be operated, the bonnet 4' needs to be unscrewed first, which is time-consuming and labor-intensive
Moreover, in order to prevent the valve stem 2' from flying out of the valve body 1' due to excessive valve opening, causing personal injury, a retaining ring 3' is provided on the inner wall of the top of the valve body 1' to limit the valve stem 2'. , because the retaining ring 3' is a separate part, there will be a phenomenon of missing or improper assembly during assembly, and in this case, it is still possible that the valve stem 2' will be released from the inside of the valve body 1' due to system pressure. The phenomenon of flying out
[0007] The bonnet 4' and the valve body 1' are threaded. The material of the bonnet is usually brass. In order to ensure the strength, the connection part of the bonnet and the valve body is required to have a certain thickness, so the weight of the valve body and the valve bonnet are increased. weight, increased material cost

Method used

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Embodiment Construction

[0027] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Please refer to figure 2 , figure 2 It is a schematic structural diagram of the first embodiment of the cut-off valve provided by the present invention.

[0029] The shut-off valve disconnects the refrigerant passage before installing the air conditioner, and then connects the refrigerant passage after installing the air conditioner, or when it is necessary to charge the refrigeration system with refrigerant, first operate the valve stem to close the shut-off valve, and after the charging is completed, Operate the valve stem again to open the shut-off valve, which can be used as an operable manual on-off valve.

[0030] The stop valve includes a valve body 10 and a valve stem 20; wherein, the valve body 10 is generally cy...

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PUM

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Abstract

A globe valve, comprising a valve body with a valve port and a valve stem arranged inside the valve body, the valve stem can move up and down in the valve body to open or close the valve port, characterized in that the valve The upper end of the body is provided with a first installation part, and a sealing gasket is arranged in the first installation part, and a sealing part is arranged between the sealing gasket and the valve stem. The shut-off valve provided by the present invention, because the sealing gasket is provided, realizes the hard seal and at the same time forms a secondary seal through the sealing part, cancels the metal bonnet part, reduces the material cost and process cost, and can thin the valve body The thickness of the top.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a shut-off valve for controlling the on-off of refrigerant. Background technique [0002] In the air conditioning system, the shut-off valve is mainly used to connect the indoor unit and the outdoor unit. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a typical shut-off valve in the prior art. [0004] The stop valve includes a valve body 1' and a valve stem 2'; wherein, the left end of the valve body 1' is provided with a first passage 11', and the lower end is provided with a second passage 12'; the valve stem 2' is set inside the valve body 1' In the cavity, the valve stem 2' is provided with external threads, and the inner cavity wall of the valve body 1' is provided with internal threads that match the external threads of the valve stem 2', so that when the valve stem 2' rotates, the Under the action, it moves up and down in the inner...

Claims

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Application Information

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IPC IPC(8): F16K1/02F16K27/02F16K41/06
CPCF16K1/02F16K27/02F16K41/06
Inventor不公告发明人
OwnerZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD