CN101865297A - Anti-cavitation erosion adjusting valve capable of cutting - Google Patents

Anti-cavitation erosion adjusting valve capable of cutting Download PDF

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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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CN
China
Prior art keywords
valve
valve seat
cavitation erosion
spool
seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 201010206802
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Chinese (zh)
Inventor
陈彦
张程
张志超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUXIN INTELLIGENT AUTOMATIC CONTROL ENGINEERING Co Ltd
Wuxi Smart Auto Control Engineering Co Ltd
Original Assignee
WUXIN INTELLIGENT AUTOMATIC CONTROL ENGINEERING Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WUXIN INTELLIGENT AUTOMATIC CONTROL ENGINEERING Co Ltd filed Critical WUXIN INTELLIGENT AUTOMATIC CONTROL ENGINEERING Co Ltd
Priority to CN 201010206802 priority Critical patent/CN101865297A/en
Publication of CN101865297A publication Critical patent/CN101865297A/en
Pending legal-status Critical Current

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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

A kind of modulating valve of anti-cavitation erosion cutting
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.
Valve seat 2 sealing surfaces of the present invention are designed to sharper otch, and sealing surface is with outward than the Vernonia parishii Hook space, and zigzag fashion stream chamber is arranged at the bottom of sealing surface, and valve seat 2 bottoms increase multilayer restricting orifice 5; Spool 3 sealing surface upsides also are designed to sharper otch.Valve seat 2 screws in 1 hole of valve bodies, after spool 3 and valve rod 4 assemblings finish, spool 3 sealing surfaces are steadily contacted with valve seat 2 sealing surfaces gets final product.
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.
CN 201010206802 2010-06-13 2010-06-13 Anti-cavitation erosion adjusting valve capable of cutting Pending CN101865297A (en)

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)

Publication Number Publication Date
CN101865297A true CN101865297A (en) 2010-10-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201010206802 Pending CN101865297A (en) 2010-06-13 2010-06-13 Anti-cavitation erosion adjusting valve capable of cutting

Country Status (1)

Country Link
CN (1) CN101865297A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
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

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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)

* Cited by examiner, † Cited by third party
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