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An emergency cut-off valve with bellows

A technology of bellows and shut-off valves, applied in the field of emergency shut-off valves, which can solve problems such as internal leakage, insufficient valve closing force, and increased difficulty in valve opening and closing, and achieve the effect of tight sealing, flexible and fast opening and closing

Active Publication Date: 2016-08-24
JIANYANG ZHONGYUAN LOW TEMPERATURE EQUIP KIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the packing tightly hugs the valve stem, it will make it more difficult for the valve to open and close, and it will not close tightly, resulting in internal leakage. The pressure is a constant design value, so it will cause insufficient closing force of the valve, resulting in lax closing and micro leakage, which is also a common situation in the market.

Method used

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  • An emergency cut-off valve with bellows
  • An emergency cut-off valve with bellows
  • An emergency cut-off valve with bellows

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings. The protection scope of the present invention is not limited to the following:

[0017] Such as figure 1 or figure 2 As shown, an emergency shut-off valve with bellows includes a compression screw plug 1, an upper valve body 2, a valve seat 3, a lower valve body 4, and a valve stem 5. The upper valve body 2 is installed on the top of the valve seat 3. The lower valve body 4 is installed at the bottom of the valve seat, the valve stem 5 passes through the lower valve body 4, the valve seat 3 and the upper valve body 2 in turn. The top of the valve stem 5 is connected to the upper valve stem 14 installed in the upper valve body 2. A valve core 6 is connected to the bottom of the rod 5, a handwheel 7 is installed on the top of the upper valve rod 14. The valve rod 5 is sleeved with a bellows 8 in the axial direction, the bellows 8 is arranged in the valve seat 3, and the bello...

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Abstract

The invention discloses an emergency cut-off valve with a bellows, which comprises a compression screw plug (1), an upper valve body (2), a valve seat (3), a lower valve body (4) and a valve stem (5), The top of the valve stem (5) is connected with the upper valve stem (14) installed in the upper valve body (2), the bottom of the valve stem (5) is connected with the valve core (6), and the valve stem (5) is axially The bellows (8) is set in the direction, the bellows (8) is set in the valve seat (3), the bottom of the bellows (8) is fixedly connected and sealed with the valve stem (5), and the top of the bellows (8) is connected with The disc (9), the valve seat (3) is provided with a cavity for installing the bellows (8), the side wall of the cavity has an annular step surface, and a sealing ring (10) is installed on the annular step surface, the disc ( 9) Compressed by the compression plug (1) installed on the top of the step surface. The invention has the beneficial effects of simple structure, tight sealing and more flexible and rapid opening and closing process.

Description

technical field [0001] The invention relates to the technical field of emergency shut-off valve sealing, in particular to an emergency shut-off valve with bellows. Background technique [0002] The cryogenic emergency shut-off valve is also called the safety shut-off valve, which means that in the event of an emergency, the valve is quickly closed to cut off the gas transmission channel in the valve and avoid accidents, so it has a safe and reliable effect. [0003] The valve stem of the low temperature emergency shut-off valve generally adopts a packing sealing structure to prevent the gas medium from leaking out. The packing is set around the valve stem, and then the packing is pressed by the packing gland so that the packing hugs the valve stem to form a seal. Since the packing tightly hugs the valve stem, it will make it more difficult for the valve to open and close, and it will not close tightly, resulting in internal leakage. The pressure is a constant design value,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/00F16K41/10
CPCF16K1/465F16K41/10
Inventor 王莹
Owner JIANYANG ZHONGYUAN LOW TEMPERATURE EQUIP KIT