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Ultra-low-temperature low-leakage high-pressure balanced regulating valve

A low-leakage, balanced technology, applied in the direction of valve lifts, valve details, valve devices, etc., can solve problems such as deformation and medium leakage, and achieve the effects of reducing consumption, reducing friction, and excellent coaxiality

Pending Publication Date: 2020-06-05
WUZHONG INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The traditional single low temperature and high pressure balance seal ring deforms at ultra-low temperature, resulting in medium leakage from the balance seal ring

Method used

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  • Ultra-low-temperature low-leakage high-pressure balanced regulating valve

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Embodiment Construction

[0024] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0025] Such as Figure 1-2 As shown, the present invention is a low-temperature, low-leakage, high-pressure balanced regulating valve, which includes an upper sleeve 1 and a lower sleeve 2 that are engaged with each other; Through hole; the valve core 3 is fixedly connected with one end of the valve stem 4, and the other end of the valve stem 4 passes through the upper valve cover 5 to connect with the actuator; the upper end surface of the lower sleeve 2 is provided with an annular groove 6, and the annular groove 6 is placed Guide wedge-shaped stop ring 7, disc spring group 8 for supporting guide wedge-shaped stop ring 7; PCTFE wedge-shaped seal 9 is set on...

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Abstract

The invention relates to an ultra-low-temperature low-leakage high-pressure balanced regulating valve. The regulating valve comprises a flange type upper sleeve, a lower sleeve and a valve element; the valve element is fixedly connected with one end of a valve rod, and the other end of the valve rod penetrates through an upper valve cover and is connected with an execution mechanism; an annular groove is formed in the upper end face of the lower sleeve, and a guide wedge-shaped retaining ring and a disc spring group are placed in the annular groove. The outer wall of the valve element is sleeved with a PCTFE wedge-shaped sealing part, the wedge-shaped surface of the outer side face of the PCTFE wedge-shaped sealing part abuts against the wedge-shaped surface of the guide wedge-shaped retaining ring, and the inner side face of the PCTFE wedge-shaped sealing part and the outer wall of the valve element are attached and sealed. The PCTFE wedge-shaped sealing part is arranged outside the valve element, and the supporting force of the disc spring group on the guide wedge-shaped retaining ring is converted into the force for the PCTFE wedge-shaped sealing part to be horizontally attachedto the valve element through the wedge-shaped surface, so that the valve element and the PCTFE wedge-shaped sealing part are attached and sealed all the time in the lifting process, and the problem that the leakage amount of a balancing sealing ring in ultra-low-temperature environments is large is solved.

Description

technical field [0001] The invention relates to a valve body, in particular to an ultra-low temperature, low-leakage, high-pressure balanced regulating valve. Background technique [0002] With the continuous expansion of my country's LNG and air separation plant market, the demand for low temperature valves is increasing, and the pressure level requirements for low temperature valves are also higher. As a result, traditional low temperature and high pressure control valves have large internal and external leakage. Problems are becoming more and more obvious and need to be solved urgently. However, most of the low-temperature and high-pressure valves used in my country are imported. In the field of low-temperature industrial automation control in China, it is difficult to satisfy users with ultra-low temperature, low leakage, and high pressure due to the tightness and reliability of the traditional single low-temperature balance sealing ring. Poor requirements, this ubiquitou...

Claims

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Application Information

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IPC IPC(8): F16K1/32F16K1/46F16K27/02F16K27/12F16K41/04
CPCF16K1/32F16K1/46F16K27/02F16K27/12F16K41/04
Inventor 马玉山金建云常占东李虎生马佳庆
Owner WUZHONG INSTR