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Middle shaft seal structure of stop valve

A technology of shaft sealing and stop valve, which is applied in the field of stop valve center shaft sealing structure, can solve the problems of stop valve center shaft leakage, cumbersome replacement operation, and weakened sealing performance, so as to avoid sealing aging, improve sealing effect, and avoid vibration failure Effect

Pending Publication Date: 2018-09-28
ZHONGSHAN TIEWANG FLUID CONTROL EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

[0002] In the prior art, the common center shaft sealing structure of globe valve generally adopts V-shaped packing, weaving PTFE packing or graphite packing. If the sealing performance is lowered, its sealing performance will be greatly weakened. Often after a period of use, the central shaft of the stop valve will leak, and when the sealing structure is damaged, it is inconvenient to take out and the replacement operation is cumbersome. Therefore, a sealing structure for the central shaft of the stop valve is needed. to solve the above-mentioned problems

Method used

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  • Middle shaft seal structure of stop valve
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  • Middle shaft seal structure of stop valve

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Embodiment Construction

[0019] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] see Figure 1-Figure 4 , the present invention provides a technical solution: a center shaft sealing structure of a stop valve, including a valve body 1, an assembly hole 2, a center shaft 3, a sealing assembly 4 and an ejection assembly 5, and the assembly hole 2 is set on the upper end of the valve body 1, The central shaft 3 is assembled inside the assembly hole 2, the sealing assembly 4 is arranged between the central shaft 3 and the valve body 1, the ejector assembly 5 is installed inside the valve body 1 on the lower side of the sealing assembly 4, and the sealing assembly 4 includes a concave platform 401, Sealing O-shaped packing 1 402, 304 bracket 403, annular groove 404, sealing O-shaped packing 2 405, V-shaped packing 406, pressu...

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Abstract

The invention provides a middle shaft seal structure of a stop valve. The middle shaft seal structure comprises a valve body, an assembling hole, a middle shaft, a seal assembly and an ejection assembly. The middle shaft is assembled in the assembling hole. The seal assembly is arranged between the middle shaft and the valve body. The ejection assembly is arranged in the part, on the lower side ofthe seal assembly, of the valve body. The seal assembly comprises a concave table, first seal O-shaped filler, a 304 support, an annular groove, second seal O-shaped filler, V-shaped filler, a pressing sleeve, a V-shaped groove, a pressing cover and connecting pieces. The ejection assembly comprises blind holes, mini screws, mini ball nut bases, mini gears, mini inner gear rings, sealing plugs, sliding grooves, sliding blocks, rack rods, through holes and annular installing cavities. Compared with the prior art, the middle shaft seal structure has the following beneficial effects that the sealing effect is improved, and the situation of failures due to vibration is avoided; and meanwhile, ejection of the first seal O-shaped filler, the second seal O-shaped filler, the 304 support and theV-shaped filler is convenient, and replacement is convenient.

Description

technical field [0001] The invention relates to a central shaft sealing structure of a cut-off valve, which belongs to the technical field of valve bodies. Background technique [0002] In the prior art, the common center shaft sealing structure of globe valve generally adopts V-shaped packing, weaving PTFE packing or graphite packing. If the sealing performance is lowered, its sealing performance will be greatly weakened. Often after a period of use, the central shaft of the stop valve will leak, and when the sealing structure is damaged, it is inconvenient to take out and the replacement operation is cumbersome. Therefore, a sealing structure for the central shaft of the stop valve is needed. to solve the above-mentioned problems. Contents of the invention [0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a sealing structure for the center shaft of a stop valve to solve the problems raised in the above-mentioned ba...

Claims

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Application Information

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IPC IPC(8): F16K41/02F16K1/00
CPCF16K1/00F16K41/02
Inventor 黄汉敏温耀信谭敬罕罗国辉刘晨何柏凡吴敏珊周境涛张庆旺乔玉凤
Owner ZHONGSHAN TIEWANG FLUID CONTROL EQUIP CO LTD
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