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Pilot operated serial adjusted stop valve

A shut-off valve, pilot type technology, applied in the direction of lift valve, valve detail, valve device, etc., can solve the problems of poor dynamic stability, short service life, poor erosion resistance, etc., achieve small thrust, avoid high-frequency oscillation, prevent good blocking effect

Inactive Publication Date: 2018-06-12
WUXI SMART AUTO CONTROL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional steam regulating shut-off valves have disadvantages such as poor sealing, poor dynamic stability, easy jamming under high temperature conditions, poor erosion resistance, short service life, and high noise, which cannot meet the requirements of harsh working conditions.

Method used

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  • Pilot operated serial adjusted stop valve
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Experimental program
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Embodiment Construction

[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] Such as Figure 1~9 As shown, the present invention mainly includes an upper cover 14 and a valve body 1 , the middle head of the valve body 1 is tightly connected with the upper cover 14 , and the inner cavity of the valve body 1 is provided with a main valve core 5 and a valve seat 2 . The main spool 5 is a multi-stage series decompression structure, specifically, it includes the upper part 5-1 of the main spool and the lower part 5-2 of the main spool, and the lower part 5-2 of the main spool forms multiple conical structures along the axial direction , the tapered structures are all extended along the radial direction.

[0029] The main valve core 5 is provided with a balance hole 5a, the balance hole 5a is arranged on the lower part of the upper part 5-1 of the main valve core, the balance hole 5a is arranged radially through, a...

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Abstract

The invention belongs to the technical field of fluid control valves and relates to a valve suitable for adjustably cutting of steam in a high-temperature high-pressure steam working condition, in particular to a pilot operated serial adjusted stop valve. The pilot operated serial adjusted stop valve comprises an upper cover and a valve body, wherein the middle head of the valve body is in fastening connection to the upper cover, and a main valve element and a valve seat are arranged in the inner cavity of the valve body; a guide sleeve is arranged in the inner cavity of the middle head of thevalve body, and a guide ring and a supporting ring are arranged between the guide sleeve and the main valve element; a balancing hole is formed in the main valve element, the lower end of the main valve element is in hermetic contact with the valve seat, the main valve element is hermetically connected to a piloted operated valve element assembly through a thrust ring, and a reset spring and a spring seat are arranged between the main valve element and the pilot operated valve element assembly. The stop valve provided by the invention has the advantages of being excellent in sealing propertyand adjusting property, good in dynamic stability, hard to lock, good in erosion resistance, long in service life, low in noise and the like, and the valve can copy with adjusting and cutting off working conditions of steam at high temperatures (greater than or equal to 290 DEG C) with a high pressure difference (greater than or equal to 3MPa) effectively as a result of an excellent comprehensiveperformance.

Description

technical field [0001] The invention belongs to the technical field of fluid control valves, and relates to a valve suitable for high-temperature and high-pressure steam conditions to regulate and cut off the steam, in particular to a pilot-operated series-type regulating and cutting-off valve. Background technique [0002] Coal chemical industry is the process of converting coal into gas, liquid, solid fuel and chemical products through chemical processing. It mainly includes coal gasification, liquefaction, dry distillation, tar processing and calcium carbide acetylene chemical industry. With the expansion of production capacity of new coal chemical plants (such as coal-to-oil, coal-to-gas, coal-to-olefins, coal-to-ethylene glycol, etc.), the supporting air separation units tend to be large in number and large in size. Usually one power steam main pipe needs to supply steam to several sets of air separation units at the same time. Due to the increase of air separation uni...

Claims

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Application Information

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IPC IPC(8): F16K1/00F16K1/32F16K1/36F16K1/42F16K47/02F16K47/08
CPCF16K1/00F16K1/32F16K1/36F16K1/42F16K47/02F16K47/023F16K47/08
Inventor 孙涛张志超陈彦陆坤铭
Owner WUXI SMART AUTO CONTROL ENG CO LTD
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