CN87214653U - 减压阀的柱塞限制结构 - Google Patents

减压阀的柱塞限制结构 Download PDF

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CN87214653U
CN87214653U CN198787214653U CN87214653U CN87214653U CN 87214653 U CN87214653 U CN 87214653U CN 198787214653 U CN198787214653 U CN 198787214653U CN 87214653 U CN87214653 U CN 87214653U CN 87214653 U CN87214653 U CN 87214653U
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Prior art keywords
valve
plunger
pressure
main valve
valve body
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CN198787214653U
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小山光弘
小池正
横山武志
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TLV Co Ltd
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TLV Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
    • F16K31/383—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/14—Control of fluid pressure with auxiliary non-electric power
    • G05D16/16—Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid
    • G05D16/166—Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid using pistons within the main valve

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Fluid Pressure (AREA)
  • Safety Valves (AREA)

Abstract

在一种控制型减压阀里，通过控制阀调整一柱塞的工作压力而使一主阀体和一主阀座开闭，该控制阀可用来检测第二压力，当主阀体和主阀座接触时，柱塞的上端面和阀体的对着所述端成的内壁面之间的空隙为零或近似于零，或为0到1mm。

Description

本发明涉及一种安装在蒸汽或压缩空气管道系统里的、以使第二流体压力保持在一恒定的调定压力上的减压阀，并特别涉及一种结构型式，在这种型式里，第一流体压力通过一控制阀作用在一柱塞的上表面上，该控制阀通过检测第二压力而被开闭，而该柱塞则根据其上表面和另一与第二侧连通的柱塞的表面之间的压力差运行，以便开关与柱塞连接的主阀，其中一空隙形成于柱塞的上端面与阀体对着所述上端面的内壁面之间。
通常，在普通的控制式减压阀里，柱塞20的上端面101和阀体的内壁面102之间的空隙X1维持在10mm左右，如图2所示。
如图2所示的减压阀包括减压阀部分1，汽水分离器2和疏水阀部分3。阀体10有一进口12，一阀口14和一出口16。进口12与第一侧高压流体源连接，而出口与第二侧低压区连接。阀口由一阀座部件形成。
主阀体18被安装在形成阀口14的阀座15的进口端，使主阀体18可被盘簧弹性地推动。柱塞20被滑动地安装在泵体22里，柱塞杆17与位于阀口14内的主阀体18上的中心凸出杆13相接。柱塞的下表面与柱塞杆17在半球形面处牢固地连在一起。控制阀26被安装在进口12和柱塞20的上部空间里，并与与柱塞室连通的第一压力通道24连通。薄膜28的外周边缘被夹在法兰30和32里。薄膜28的下部空间通过第二压力通道34与出口16连通。控制阀26的阀杆36的头部端面与薄膜28的下表面中心处相碰，用来调定压力的压力调定弹簧40通过弹簧座38被安装成与薄膜28的上表面相碰。调整螺钉44通过螺旋安装在阀体10里。
当调整螺钉44被向左或向右旋转时，压力调定弹簧40压向薄膜28的弹性力发生变化。以压力调定弹簧40的弹性力作为参考值，薄膜28对作用在它下表面的第二压力起反应而弯曲，从而移动阀杆36，使控制阀26可以开或闭。结果，第一流体压力被引入柱塞室，使得柱塞20运动，主阀体18被移动，而进口12处的流体通过阀口14流入出口16。这都是自动进行的，以便当第二流体压力降低时，阀口14打开，而当第二流体升高时，阀口14关闭。
阀口14的下面安装着一圆柱体隔板46，在隔板46和环绕着它的阀体10之间形成一环形间隔48，环形间隔48的上部通过锥形格栅50与进口12连通，而它的下部与疏水阀室52的上部连通。疏水阀室52的上部通过隔板46的中间开口与阀口14连通。在环形间隔48里安装一个形状如倾斜壁的旋转叶片54。
因此，当阀口14被打开，进口12里的流体经过环形间隔48时，由于旋转叶片54的作用，流体具有旋转的趋向并打旋。液体向外运动，碰撞着阀体的内壁并向下流入疏水阀室52，而轻的气体则在中间部位打旋，并通过隔板46的中间开口流向阀口14，再流向出口16。
疏水阀室52有一通向疏水口56的疏水阀口58。球阀浮体60由浮体罩62所覆盖，并可移动地置于其内。浮体罩62的上部有小孔64。
这样，球阀浮体60根据疏水阀室52里的水的多少浮起或沉下，以便打开或关闭疏水阀口58，从而自动地排出存留在疏水阀室52里的水。
在上述结构的减压阀里，当调定压力（第二压力）低于第一压力时，即减压比较大时，会发生显著的振动现象。例如，减压比处于这样的情况，第一压力10kg／cm2被减低到调定压力2Kg／cm2或更少。
根据试验，在图2所示的减压阀里，当压力逐步地降低，从薄膜28没有被压力调定弹簧40推动的状态过度到被推动状态，控制阀26开始打开。然而，在第一压力是10Kg／cm2，而第二压力是大气压力时，也即控制阀26开始打开的时候，高压的第一蒸汽通过控制阀26迅速地流入柱塞20的上部分空间，阀口14迅速地打开。此时，阀口第二侧附近的部分一瞬间处于高压状态，由此在控制阀打开的同时阀口会迅速地关闭。然而，由于第二压力是低的，出口附近的压力将瞬间降低，由此控制阀迅速地打开。这个过程是很快实现的，从而产生很大的冲击和噪音。
这种现象的产生是由于主阀体18迅速地打开，使流向第二侧的高压流体的射流迫使柱塞20向上，从而冲击着柱塞20上端面的阀体内壁面，而当阀杆17向下运动时，又冲击主阀体18。结果，会产生以下的问题，诸如柱塞20上端面的变形，柱塞杆17的弯曲和折断，主阀体18和主阀座15的阀座表面的损坏。
本发明的目的是，即使有振动发生，也要降低冲击，并使柱塞旁可移动零件的损坏减至最小程度。
解决上述技术问题的本发明的技术手段存在于一控制型减压阀里，在这种减压阀里，主阀体和主阀座的开闭是通过一控制阀来调整一柱塞的工作压力实现的，该控制阀能用来检测第二压力，特别是在主阀体与主阀座接触的时候，柱塞的上端面和对着所述上端面的阀体的内壁面之间的空隙等于零或近似于零。
即使由于振动现象而发生显著的冲击，它的冲击力也是小的，这是因为柱塞可以移动的量是很小的。另外，由于柱塞向下运动时其移动量是很小的，因此，它的动能是很小的，而作用在主阀体上的冲击力也是很小的。
表示上述技术手段的一个特别实施例将在下面叙述（见图1）。
对应于图2，所示的零件用与图2相同的标号表示，减压阀的详细情况将不再叙述。
在图1所述的状态里，阀口14是关闭的。在一柱塞的上端面101和阀体的内壁102之间的空隙X2如图1所示的那样是很小的。在实际制造中，考虑到制造公差，空隙被定到近似0.5mm。当然，最好空隙接近于零。
柱塞20的圆周壁上有环形槽，由氟树脂制成的柱塞环103和104置于其间。弹性件105和106从里向外伸展，以便增加相对于泵体22的滑动性和密封性。
在已有技术中，由于空隙X2较大，柱塞冲击阀体内壁102的力也较大，使柱塞上端的外周部分107塌陷，挤压柱塞环103，从而破环了密封性和滑动性。然而，根据本发明，由于空隙X2较小，上述的现象就不会发生，从而能在很长一段时间保持稳定的性能。
因此，即使发生振动，振动噪音也是很小的，从而就能不损坏柱塞杆和柱塞的上端面并保持平稳的运转状态。另外，由于阀座表面没有损坏，减压阀所特有的各种性能，诸如压力特性，加速关闭等等就会实现。

Claims (2)

1、在一种控制型减压阀里，通过控制阀调整一柱塞的工作压力而使一主阀体和一主阀座开闭，该控制阀可用来检测第二压力；减压阀的柱塞限制结构特征在于，在主阀体与主阀座接触时，柱塞的上端面和阀体的对着所述端面的内壁面之间的空隙为零或近似于零。
2、根据权利要求1所述的减压阀的柱塞限制结构，其特征在于，柱塞的上端面和阀体的对着所述端面的内壁面之间的空隙为0到1mm。
CN198787214653U 1986-10-28 1987-10-21 减压阀的柱塞限制结构 Withdrawn CN87214653U (zh)

Applications Claiming Priority (2)

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JP1986166276U JPS6372615U (zh) 1986-10-28 1986-10-28
JP166276/86 1986-10-28

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CN87214653U true CN87214653U (zh) 1988-10-12

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EP (1) EP0266007B1 (zh)
JP (1) JPS6372615U (zh)
KR (1) KR920007769B1 (zh)
CN (1) CN87214653U (zh)
AR (1) AR243658A1 (zh)
AU (1) AU589045B2 (zh)
CA (1) CA1288659C (zh)
DE (2) DE3775706D1 (zh)
DK (1) DK167830B1 (zh)
ES (1) ES2028055T3 (zh)
GR (1) GR3003500T3 (zh)
NZ (1) NZ222152A (zh)
PT (1) PT85990B (zh)
ZA (1) ZA878054B (zh)

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CN108799583B (zh) * 2018-08-27 2024-02-13 成都川力智能流体设备股份有限公司 一种减压阀反馈气体平衡器
CN112066054B (zh) * 2020-11-16 2021-02-02 天津市塘沽第一阀门有限公司 直通式活塞驱动智能流量控制阀
CN112797221B (zh) * 2021-03-01 2022-09-06 四川长仪油气集输设备股份有限公司 先导轴流式安全阀
CN113389933B (zh) * 2021-07-29 2022-08-09 四川长仪油气集输设备股份有限公司 多功能先导式安全阀

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1078604A (fr) * 1953-04-02 1954-11-19 Lecq Et Cie Soc Dispositif d'enclenchement et de déclenchement pneumatique
US3131722A (en) * 1961-11-27 1964-05-05 Ross Operating Valve Co Valve
DE1550411A1 (de) * 1965-11-03 1969-07-24 Mcconnel F W Ltd Steuerventil
JPS4532717Y1 (zh) * 1967-05-15 1970-12-14
JPS5021329A (zh) * 1973-06-28 1975-03-06
CN1005588B (zh) * 1985-10-30 1989-10-25 Tlv有限公司 减压阀
JPS6331415U (zh) * 1986-08-12 1988-03-01

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KR920007769B1 (ko) 1992-09-17
DK167830B1 (da) 1993-12-20
EP0266007B1 (en) 1992-01-02
AU589045B2 (en) 1989-09-28
CA1288659C (en) 1991-09-10
JPS6372615U (zh) 1988-05-16
PT85990B (pt) 1993-08-31
EP0266007A2 (en) 1988-05-04
PT85990A (pt) 1988-11-30
ZA878054B (en) 1988-06-29
DE3775706D1 (de) 1992-02-13
EP0266007A3 (en) 1989-03-08
KR880005386A (ko) 1988-06-29
GR3003500T3 (en) 1993-02-17
AR243658A1 (es) 1993-08-31
DK550187A (da) 1988-04-29
AU7974887A (en) 1988-05-26
DE8714320U1 (de) 1988-01-28
ES2028055T3 (es) 1992-07-01
NZ222152A (en) 1989-08-29
DK550187D0 (da) 1987-10-20

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