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Novel double-sealed instrument block valve

A double-sealed, globe valve technology, applied in shaft seals, lift valves, valve details, etc., can solve the problems of leakage of the packing sealing part of the globe valve of the instrument, medium leakage, insufficient sealing of the globe valve of the instrument, etc., to ensure no leakage, Improve the sealing performance, the sealing effect is stable and long-term effect

Inactive Publication Date: 2019-01-04
JIANGSU HUATAI ELECTRIC POWER ELECTRONICS INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing instrument globe valve sometimes leaks from the sealing part of the packing, which leads to insufficient sealing of the instrument globe valve and leakage of the medium

Method used

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  • Novel double-sealed instrument block valve

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Embodiment Construction

[0018] A new type of double-sealed instrument stop valve provided in this embodiment has a structure such as figure 1 As shown, it includes a valve body 1 located below, a valve cover 2 is installed on the upper side of the valve body 1, and the lower end of the valve cover 2 is provided with a coaxial lower gland nut 61, and the lower gland nut 61 is threaded at the same time. On the upper end of the valve body 1, the upper side of the lower gland nut 61 is fitted with a coaxial lower fixing nut 62, and the lower fixing nut 62 is threadedly connected with the bonnet 2; the upper end of the bonnet 2 is threadedly connected with A coaxial upper gland nut 71 , and a coaxial upper fixing nut 72 is attached to the lower side of the upper gland nut 71 , and the upper fixing nut 72 is threadedly connected to the valve cover 2 .

[0019] The upper end of the valve cover 2 is inserted with a coaxial upper valve stem 31, and the upper end of the upper valve stem 31 is provided with a r...

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Abstract

The invention discloses a novel double-sealed instrument block valve, and relates to the technical field of industrial automation. According to the novel double-sealed instrument block valve, a sealing ring disposed between an upper valve rod and the inner wall of a valve cover initially ensures the sealing property of the inner wall of the valve cover, at the same time, the sealing ring is further filled with sealing packing so as to fully cover the upper valve rod, the sealing property is further improved, and since the upper valve rod is rotatably connected into the valve cover, the upper valve rod only rotates without generating displacement in other directions, so that only the mutual movement between the upper value rod and the sealing packing in the circumferential direction is generated, and the sealing effect of the sealing packing is more stable and long-lasting. A metal corrugated tube can be both compressed and stretched, the own elastic deformation of the metal corrugatedtube realizes the movement of the valve core, and a medium is completely sealed in a closed cavity formed by the metal corrugated tube and the valve cover, the contact between the medium and the sealing packing is blocked, and no leakage of a packing sealing part is achieved.

Description

technical field [0001] The invention relates to the technical field of industrial automation control, in particular to a novel double-sealed instrument cut-off valve. Background technique [0002] Globe valve, also called cut-off valve, is one of the most widely used valves. The reason why it is popular is that the friction between the sealing surfaces is small during the opening and closing process, it is relatively durable, the opening height is not large, and it is easy to manufacture. , easy maintenance, not only suitable for medium and low pressure, but also suitable for high pressure. The closing principle of the globe valve is to rely on the pressure of the valve rod to make the sealing surface of the disc and the sealing surface of the valve seat fit closely to prevent the flow of medium. [0003] At present, the structure of the widely used instrument globe valve is composed of valve body, valve seat, valve stem, valve core, packing and handwheel or handle. To ens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/32F16K27/02F16K41/10F16K41/02
CPCF16K1/32F16K27/0209F16K41/02F16K41/10
Inventor 耿成林陆超陈龙
Owner JIANGSU HUATAI ELECTRIC POWER ELECTRONICS INSTR
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