CN101865297A - Anti-cavitation erosion adjusting valve capable of cutting - Google Patents
Anti-cavitation erosion adjusting valve capable of cutting Download PDFInfo
- Publication number
- CN101865297A CN101865297A CN 201010206802 CN201010206802A CN101865297A CN 101865297 A CN101865297 A CN 101865297A CN 201010206802 CN201010206802 CN 201010206802 CN 201010206802 A CN201010206802 A CN 201010206802A CN 101865297 A CN101865297 A CN 101865297A
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- valve
- valve seat
- cavitation erosion
- spool
- seat
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Abstract
The invention relates to an anti-cavitation erosion adjusting valve capable of cutting, which comprises a valve body, a valve seat, a valve core and a valve rod. The invention is characterized in that the sealed face of the valve seat is provided with a cut, the upper side of the sealed face of the valve core is provided with the cut, the valve core sealed face tightly contacts with the valve seat sealed face and the lower part of the valve seat is provided with two or more than two layers of parallel restriction orifices which are provided with small holes. The inner wall at the lower part of the valve seat sealed face is provided with a zigzag groove so that a zigzag swirl chamber is formed between the valve seat and the valve core. The invention adopts the valve seat cutting technology and cuts air bubbles generated by flash evaporation through the sharp cut of the valve seat sealed face, consequently the cavitation erosion is avoided and the damage of the cavitation erosion on the interior components of the valve is eliminated thoroughly.
Description
Technical field
The present invention relates to a kind of modulating valve of anti-cavitation erosion cutting, the modulating valve of the industrial anti-cavitation erosion cutting under specifically a kind of High Pressure Difference working condition.
Background technique
Because industrial more and more polynary change has produced a lot of harsh operating modes in the process control field, High Pressure Difference is exactly wherein a kind of.Owing to the throttling reason, the High Pressure Difference operating mode is prone to flash distillation and cavitation phenomenon, causes valve internals and adjacent inner-walls of duct to produce seriously washing away and cavitates, and finally influences the stability of normally using and installing of valve.
The modulating valve method that overcomes this kind operating mode commonly used mainly contains two kinds at present, the one, multistage voltage drop method, what the pressure degradation that will produce by the fluid of modulating valve is divided into, fluid whenever by one-level all owing to crooked stream increases resistance, ram pressure is lost, pressure during fluid process afterbody falls less than the critical pressure of this grade and falls, thereby has prevented the generation of cavitation phenomenon; The 2nd, cage construction is made the birdcage structure with valve seat, to reach the effect that pressure falls.
In fact, method one often in the end one-level also be difficult to avoid cavitation phenomenon, and the crooked stream processing of multistage step-down is responsible for, expense is higher; The pressure promulgation curve of method two valve is identical with general valve, can not prevent cavitation, just, cause the destruction of cavitation phenomenon directly not contact valve inner, make the degree and the effect that damage alleviate greatly because valve cage has formed a space between valve body and spool.
Summary of the invention
The objective of the invention is to avoid above-mentioned potential risk, thereby a kind of modulating valve of simple, reliable anti-cavitation erosion cutting is provided, can guarantee the reliability that valve uses, assurance device moves safely and smoothly, enhances productivity.
According to technological scheme provided by the invention, the modulating valve of described anti-cavitation erosion cutting comprises: comprise valve body, valve seat, spool and valve rod, valve seat is spun in the valve block hole, valve rod is spun in the valve rod hole of spool fastening with spool, filler assembly is equipped with in described valve rod upper end, feature is: described sealing surface of seat is provided with otch, and the valve core sealed cover upside also is provided with otch, and valve core sealed cover closely contacts with sealing surface of seat; The valve seat bottom is provided with the restricting orifice that is parallel to each other more than two-layer or two-layer, is densely covered with aperture on the described restricting orifice.
The inwall of described valve base sealing basifacial is provided with the zigzag fashion groove, makes and forms zigzag fashion stream chamber between valve seat and the spool.Leave between the sealing surface periphery of described spool and valve seat and the valve body and disperse the space.
Compared with the prior art the present invention has the following advantages:
1, effectively eliminates cavitation phenomenon, protected the valve internals, guaranteed the sealability of valve and the reliability of device;
2, inner parts structure is simple, and easily processing, assembling are with low cost.
Description of drawings
Fig. 1 is the modulating valve structural representation;
Fig. 2 is a trim structure enlarged view.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, 2, the present invention includes valve body 1, valve seat 2, spool 3 and valve rod 4, valve seat 2 is spun in 1 hole of valve body, valve rod 4 is spun in the valve rod hole of spool 3 fastening with spool 3, described valve seat 2 sealing surfaces have sharp otch, the valve core sealed cover upside of mangetic core assembly 3 also has sharp otch, and valve core sealed cover closely contacts with valve seat 2 sealing surfaces; Valve seat 2 bottoms are provided with the restricting orifice 5 that is parallel to each other more than two-layer or two-layer, are densely covered with aperture on the described restricting orifice 5.Valve rod 4 and spool 3 are assemblied in the loam cake 7.Filler assembly is equipped with in described valve rod upper end, and is fastening with screw and valve body.
The basifacial inwall of valve seat 2 sealings is provided with zigzag fashion groove 6, makes and forms zigzag fashion stream chamber between valve seat 2 and the spool 3.Leave between the sealing surface periphery of spool 3 and valve seat 2 and the valve body 1 and disperse the space.
Working principle of the present invention:
The present invention adopts the valve seat cutting technique, can not make valve avoid flash distillation fully, but but can effectively prevent to cavitate destruction to valve.Increase the valve flow resistance coefficient by valve seat 2 bottom restricting orifices and valve base sealing basifacial zigzag fashion stream chamber, reduce velocity of medium, thereby reduce medium washing away the valve internals.Because the existence that pressure falls causes fluid through valve smallest cross-sectional place, it is maximum that flow velocity reaches, and the static pressure minimum.When the pressure at this place is lower than the vapor pressure of this medium, then have partially liq and flash to bubble.When the downstream pressure recovery was higher than vapor pressure, bubble can break or to implode, and produced cavitation erosion, destroyed valve internals surface.Destroy for avoiding bubble eruption to produce, valve seat 2 sealing surfaces are designed to sharper otch, when bubble passes through, bubble are cut, and because valve seat 2 sealing surfaces are with outward than the Vernonia parishii Hook space, the break energy spread that produces of bubble can not produce and destroy valve body 1 inwall and valve seat 2, spool 3.
Claims (3)
1. the modulating valve of an anti-cavitation erosion cutting, comprise valve body (1), valve seat (2), spool (3) and valve rod (4), valve seat (2) is spun in valve body (1) the seat hole, valve rod (4) is spun in the valve rod hole of spool (3) fastening with spool (3), filler assembly is equipped with in described valve rod (4) upper end, it is characterized in that: described valve seat (2) sealing surface is provided with otch, and the valve core sealed cover upside also is provided with otch, and valve core sealed cover closely contacts with valve seat (2) sealing surface; Valve seat (2) bottom is provided with the restricting orifice (5) that is parallel to each other more than two-layer or two-layer, and described restricting orifice is densely covered with aperture on (5).
2. the modulating valve of anti-cavitation erosion cutting as claimed in claim 1 is characterized in that the basifacial inwall of described valve seat (2) sealing is provided with zigzag fashion groove (6), makes and forms zigzag fashion stream chamber between valve seat (2) and the spool.
3. the modulating valve of anti-cavitation erosion cutting as claimed in claim 1 is characterized in that described valve seat (2) sealing surface and spool (3) sealing surface upside have otch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201010206802 CN101865297A (en) | 2010-06-13 | 2010-06-13 | Anti-cavitation erosion adjusting valve capable of cutting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201010206802 CN101865297A (en) | 2010-06-13 | 2010-06-13 | Anti-cavitation erosion adjusting valve capable of cutting |
Publications (1)
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CN101865297A true CN101865297A (en) | 2010-10-20 |
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Family Applications (1)
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CN 201010206802 Pending CN101865297A (en) | 2010-06-13 | 2010-06-13 | Anti-cavitation erosion adjusting valve capable of cutting |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102809056A (en) * | 2012-08-16 | 2012-12-05 | 大连大高阀门股份有限公司 | Drain valve of supercritical thermal power generating set valve |
CN103090106A (en) * | 2013-01-28 | 2013-05-08 | 王云峰 | Valve core of nickel flotation machine regulating valve |
ITFI20120074A1 (en) * | 2012-04-12 | 2013-10-13 | Nuovo Pignone Srl | "VALVE" |
CN104040233A (en) * | 2011-12-16 | 2014-09-10 | Cla-Val公司 | Anti-cavitation valve seat |
CN105042176A (en) * | 2015-06-25 | 2015-11-11 | 浙江德卡控制阀仪表有限公司 | Pressure and noise reduction regulating valve |
CN108150708A (en) * | 2017-11-25 | 2018-06-12 | 安徽省华象铜业有限公司 | A kind of instant hot plugging plunger type valve core piston structure |
CN110645406A (en) * | 2019-09-24 | 2020-01-03 | 朱金强 | Pressure reducing valve |
CN111803983A (en) * | 2020-07-22 | 2020-10-23 | 湖北大江环保科技股份有限公司 | Oxygen pressure leaching flash evaporation exhaust control structure and control method thereof |
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CN2070382U (en) * | 1990-07-02 | 1991-01-30 | 王佐才 | Multistage throttle universal stop valve |
CN2141005Y (en) * | 1992-11-05 | 1993-08-25 | 明赐东 | High-pressure regulating valve |
EP0698838A1 (en) * | 1994-08-26 | 1996-02-28 | Hans Sasserath & Co Kg | Pressure reducing valve |
CN2526612Y (en) * | 2002-02-05 | 2002-12-18 | 陆亚安 | Minimum flow controlling valve for water pump of boiler |
US7152628B2 (en) * | 2004-02-04 | 2006-12-26 | Robert Folk | Anti-cavitation valve assembly |
CN2869460Y (en) * | 2005-09-06 | 2007-02-14 | 陕西航天泵阀科技有限公司 | Alumina Y-shape sizing material valve |
CN201896952U (en) * | 2010-06-13 | 2011-07-13 | 无锡智能自控工程有限公司 | Anti-cavitation regulating valve for cutting |
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2010
- 2010-06-13 CN CN 201010206802 patent/CN101865297A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN2070382U (en) * | 1990-07-02 | 1991-01-30 | 王佐才 | Multistage throttle universal stop valve |
CN2141005Y (en) * | 1992-11-05 | 1993-08-25 | 明赐东 | High-pressure regulating valve |
EP0698838A1 (en) * | 1994-08-26 | 1996-02-28 | Hans Sasserath & Co Kg | Pressure reducing valve |
CN2526612Y (en) * | 2002-02-05 | 2002-12-18 | 陆亚安 | Minimum flow controlling valve for water pump of boiler |
US7152628B2 (en) * | 2004-02-04 | 2006-12-26 | Robert Folk | Anti-cavitation valve assembly |
CN2869460Y (en) * | 2005-09-06 | 2007-02-14 | 陕西航天泵阀科技有限公司 | Alumina Y-shape sizing material valve |
CN201896952U (en) * | 2010-06-13 | 2011-07-13 | 无锡智能自控工程有限公司 | Anti-cavitation regulating valve for cutting |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104040233A (en) * | 2011-12-16 | 2014-09-10 | Cla-Val公司 | Anti-cavitation valve seat |
ITFI20120074A1 (en) * | 2012-04-12 | 2013-10-13 | Nuovo Pignone Srl | "VALVE" |
WO2013152993A1 (en) * | 2012-04-12 | 2013-10-17 | Nuovo Pignone Srl | Valve |
US9638342B2 (en) | 2012-04-12 | 2017-05-02 | Nuovo Pignone Srl | Control valve for gas and liquids |
CN102809056A (en) * | 2012-08-16 | 2012-12-05 | 大连大高阀门股份有限公司 | Drain valve of supercritical thermal power generating set valve |
CN103090106A (en) * | 2013-01-28 | 2013-05-08 | 王云峰 | Valve core of nickel flotation machine regulating valve |
CN105042176A (en) * | 2015-06-25 | 2015-11-11 | 浙江德卡控制阀仪表有限公司 | Pressure and noise reduction regulating valve |
CN108150708A (en) * | 2017-11-25 | 2018-06-12 | 安徽省华象铜业有限公司 | A kind of instant hot plugging plunger type valve core piston structure |
CN110645406A (en) * | 2019-09-24 | 2020-01-03 | 朱金强 | Pressure reducing valve |
CN110645406B (en) * | 2019-09-24 | 2021-06-04 | 安徽宇杰液压机械有限公司 | Pressure reducing valve |
CN111803983A (en) * | 2020-07-22 | 2020-10-23 | 湖北大江环保科技股份有限公司 | Oxygen pressure leaching flash evaporation exhaust control structure and control method thereof |
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Open date: 20101020 |