CN85105826A - 可自动调整压力的减压阀 - Google Patents

可自动调整压力的减压阀 Download PDF

Info

Publication number
CN85105826A
CN85105826A CN85105826.4A CN85105826A CN85105826A CN 85105826 A CN85105826 A CN 85105826A CN 85105826 A CN85105826 A CN 85105826A CN 85105826 A CN85105826 A CN 85105826A
Authority
CN
China
Prior art keywords
pressure
valve
difference
actuator
diaphragm
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.)
Expired - Lifetime
Application number
CN85105826.4A
Other languages
English (en)
Other versions
CN1009301B (zh
Inventor
长谷川义彦
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.)
TLV Co Ltd
Original Assignee
TLV 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 TLV Co Ltd filed Critical TLV Co Ltd
Priority to CN 85105826 priority Critical patent/CN1009301B/zh
Publication of CN85105826A publication Critical patent/CN85105826A/zh
Publication of CN1009301B publication Critical patent/CN1009301B/zh
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2086—Control of fluid pressure characterised by the use of electric means without direct action of electric energy on the controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis

Landscapes

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

Abstract

本发明涉及一种可自动调整压力的减压阀，该阀包含一个膜片，一个压力调定弹簧，调整弹簧弹性力的装置及一个用以控制调定装置的致动器；当测得之该阀之二次侧流体压力与一调定压力之目标值间之差值大于基准差值时才使致动器动作；而在测得之差值实质上为零时才使致动器停止动作。

Description

本发明涉及一种用来调整流体压力的阀。尤其涉及一种减压阀，用来减低其一次侧的流体压力以维持其二次侧之压力为定值。
减压阀通常有两类型式：一类是有一主阀，由一膜片之位移直接控制之;另一类是有一主阀例如活塞阀，间接由一先导阀所控制。流体二次压力作用在膜片一侧，而一压力调定弹簧的弹性力作用于其另一侧。若此两力不相平衡，则膜片移动促使一阀芯移动控制流经阀的流体量而维持和弹簧的弹性力相当的二次流体压力。
和阀体螺纹连接的调整螺丝用来设定所需要的二次流体压力。该螺丝是用手转动以调整压力设定弹簧的弹性力直至压力计指示出所需要的压力。当调定压力要经常改变时，此装置非常不便。此装置亦不容许任何摇控操作或自动控制。
因此，已知有一种自动控制阀。依照自动控制阀之工作原理，被控制值被测定并与一目标值相比较，根据其间之任何差值所得到的判断或指令被处理成一个信号以控制一个阀芯致动器，例如电动马达或流体致动器。
若其为一种减压阀，则二次压力由一压力传感器测知并与经由一调定机构输入的一目标值比较，比较的结果被处理成一个信号，该信号用以使电动马达等致动器作比例控制操纵或微分/积分控制操纵。因此，此阀便于实现任何目标值的变化，且允许摇控操作或自动控制。
然而，自动控制阀价格昂贵。这是由于要直接、微量并迅速地引动阀芯，须要具有高输出的致动器及用来作信号的复杂处理的控制器。
自动控制阀应答比具有膜片的减压阀为慢。这是由于致动器并不直接连接于信号处理器。
本发明的目的是提供一种减压阀，该阀包括具有小输出的致动器，但该阀便于进行压力调定的任何改变且允许摇控操作及自动控制。
根据本发明，上述目的是由如下的减压阀而达到的：
（a）包含一膜片，一压力调定弹簧，调整弹簧弹性力的装置，及一用以控制设定装置的致动器。
（b）在测得的阀的二次侧流体压力与调定压力之目标值间之差值大于基准差值时才使致动器动作;而在测得之差值实质上为零时才使致动器停止动作。
以下说明此阀之操作方式。
用一调定器调定所需要的压力。用一压力传感器连续或定期测定二次流体压力。二次流体压力与目标压力间之差值被测定并由比较控制器而与基准差值比较。若测定差值大于基准差值，则一个信号被传至驱动器用以操作致动器，使测定差值实质上能变为零。
致动器由驱动器所操作以便沿任一方向转动弹性力调定装置（例如习知之调整螺丝）而调整压力调定弹簧之弹性力。所产生之膜片位移引动阀芯以增加或减少经过阀之流体流量，籍以增加或减小二次流体压力。
二次流体压力由压力传感器测知并传送至比较控制器。当测定差值实质上已变为零时，传送一停止信号至驱动器以使致动器停止操作。
包含膜片之减压器动作方式如同习知技术，只要是二次流体压力在基准差值范围内致动器即不发生作用，但膜片之机械动作可获得流体压力减小。若其偏离开基准差值，则致动器动作以调整压力调定弹簧之弹性力，如上述。
因此，依据本发明，调定压力易于改变;且若被控制之量被侦知并输入作为一目标值，则不仅可达到摇控操作，且可以自动控制。
使用具有小输出之致动器即已足够，因为它只用来控制弹簧弹性力调整装置，而非用来完成阀芯之任何快速引动。如习知者，阀芯对膜片之机械动作迅速应答。
本发明产生很多特殊效果，此将陈述于后。
仅当测定之差值己自基准差值偏离开时致动器始动作;且在测定差值己实质上变为零时停止作动。因此，致动器并非经常在操作中或长时间连续操作，此阀之使用寿命远比任何自动控制阀为长。
若减压阀为具有一先导阀之型式者，则先导阀由一小力量引动用以操作一主阀，该主阀须要一大操作力操作。由于压力调定弹簧具有小弹性力，故使用具有小输出之致动器即己足够。
只要致动器是用来使弹簧之调整螺丝轴向移动者，即可容易地应用于任何现存之减压阀。
若二次流体压力与调定压力间之差值超过基准差值，则致动器即动作以改变调定压力使较大量之流体能流过。故，在二次流体压力有任何变化时，本发明之阀比仅依赖机械控制之任何减压阀能作更迅速之控制。
以下将参考图1中所示实施例对本发明作更明确的说明。
实施本发明的可自动调整压力的减压阀包含：一机械式减压阀部分1，一电动马达部分，及一控制部分。
阀部分1的构造与习知的减压阀相同。具有流体入口2及流体出口3，分别和一次通道4及二次通道5连接。阀部分1有主阀口7，可由主阀芯6开启或关闭。阀芯6由一弹簧推至其关闭阀口位置，并由一阀杆和活塞8连接。
经由主阀口7流至流体出口3的流体压力作用在活塞8之下表面，而经由通道9及11作用在活塞8上表面之流体压力由先导阀芯12控制。先导阀芯12由一弹簧压至其关闭位置，且和与膜片13下表面接触的阀杆连接，使其向下移动可迫使先导阀芯12进入其开启位置。
若使膜片13朝下方移动，则先导阀芯12被迫向下而允许流体由流体入口2经通道9及11而流入活塞8上方区域，并将活塞8及主阀芯6下推，借此而开启主阀口7，允许流体由流体入口2流至流体出口3。若使膜片13向上移动，则先导阀芯12被弹簧上推而切断通道9与11间的流体连通，且活塞8上方区域中的流体经由通道11，先导阀芯12的阀杆周围的间隙，及通道10而流至流体出口3，借此而迫使主阀芯6及活塞8向上关闭主阀口7。
在膜片13上方区域借一小直经的通道14而与大气连通并保持在基本不变的大气压力之下。压力调定弹簧16的下端部与膜片13上表面接触，并施力于膜片13表面上。弹簧16之上端部由一弹簧支座所支持。调整螺丝17下端与弹簧支座接触，使得调整螺丝17向任一方向之转动均可调整弹簧16之压缩量及其作用在膜片13上之弹性力。调整螺丝17与安装在构成阀体之一部分的弹簧壳体15内的一内螺纹构件作螺纹连接。
马达部分由固定于弹簧壳体15上的轭18而和阀部分1连接。输出轴20与调整螺丝17共轴，且其下端由连接件19和螺丝17之六角头42连接。
输出轴20形成滚珠花键轴。齿轮22固定于花键21之外周且夹持于上，下轴承构件23及24之间，以防止垂直及径向移动。轴承构件23及24夹持于安装板25及底板26间。电动马达29及减速器28固定于安装板25上，其输出轴27与齿轮22作螺纹连接。
若马达29被驱动，则减速器28之输出轴27被转动而经由齿轮22转动花键轴21之外周。视其转动方向，输出轴20被向上或向下转动，通过连接构件19而使调整螺丝17沿任一方向转动。
输出轴20设有圆盘35，当调整螺丝17被移至其最高或最低位置时，可以测定之。一对位置传感器33及34设于圆盘35之一侧以分别在螺丝之最高及最低位置处测定之。传感器33及34分别被固定在马达29及减速器28之侧壁。
测感器33及34最好为反射型之光感受器，当然亦可使用任何其他型式之传感器，如电位计，限位开关或磁力传感器。
驱动器30设于马达29旁边。马达部分容纳于壳套36内，后者保护防止其受尘埃，水气之害。马达部分还包括必要之配线及端子（但未图示）。
控制部分包括位置传感器33及34，比较控制器31，目标压力调定器32，及压力传感器40，该压力传感器40设于二次流体通道内。信号线37及38分别由位置传感器33及34延伸至比较控制器31。信号线39由压力传感器40延伸至比较传感器31。还有信号线由设定器32延伸至比较控制器31，信号线由比较控制器31延伸至驱动器30。比较控制器31亦可设在驱动器30处。
一目标压力由调定器32所调定并输入比较控制器31内。在二次通道5内之流体压力由压力传感器40侦知并连续地或短时间地输入至比较控制器31内。比较控制器31计算由传感器40测得之二次通道5内之流体压力与目标压力之差值，并将之与一基准差值比较。
若此比较指示出测定差值与基准差值有偏差，则比较控制器31传送一控制信号给驱动器30以便使测定差值实质上变成零，即使两次通道5内之流体压力实质上等于目标压力。马达29由驱动器30驱动以调整流过阀的流体流量。若测定差值实质上已变成零，则由比较控制器31送出一控制信号给驱动器30以停止马达29之运行;而上述测定差值实质上变成零也就是说该差值处于很小的基准差值范围内且远比上述基准差值为小。
位置传感器33及34与圆盘35协同以分别在调整螺丝17之最高及最低位置处侦测之，并将对应信号传至比较控制器31。比较控制器31对此两信号之应答比对任何其他控制信号为迅速，并传送一信号至驱动器以使马达29之运转停止。如此而可防止任何不当之力施加于调整螺丝17之控制系统。
附图之简单说明如下：
图1为根据本发明之一电气操作减压阀之纵剖面图，其控制部以方块图表示。
1…机械式减压阀部分
5…二次通道
6…主阀芯
8…活塞
12…先导阀芯
13…膜片
15…弹簧壳体
16…压力调定弹簧
17…调整螺丝
20…输出轴
21…滚珠花键轴
27…减速器输出轴
29…电动马达
30…驱动器
31…比较控制器
32…目标压力调定器
33…侦测最高位置用位置传感器
34…侦测最低位置用位置传感器
35…圆盘
40…压力传感器。

Claims (1)

  1. 一种可自动调整压力的减压阀，其特征为该阀包含一膜片，一个压力调定弹簧，调整弹簧弹性力的装置，及一个用以控制调定装置的致动器。当测得之该阀之二次侧流体压力与调定压力之目标值间之差值大于基准差值时才使致动器动作，而在测得之差值实质上为零时才使致动器停止动作。
CN 85105826 1985-08-01 1985-08-01 可自动调整压力的减压阀 Expired CN1009301B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 85105826 CN1009301B (zh) 1985-08-01 1985-08-01 可自动调整压力的减压阀

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59-207779 1984-10-02
CN 85105826 CN1009301B (zh) 1985-08-01 1985-08-01 可自动调整压力的减压阀

Publications (2)

Publication Number Publication Date
CN85105826A true CN85105826A (zh) 1986-03-10
CN1009301B CN1009301B (zh) 1990-08-22

Family

ID=4794729

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 85105826 Expired CN1009301B (zh) 1985-08-01 1985-08-01 可自动调整压力的减压阀

Country Status (1)

Country Link
CN (1) CN1009301B (zh)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102084138A (zh) * 2008-05-06 2011-06-01 伍德沃德Hrt公司 控制阀组件的流体流率特性的方法和装置
CN104106017A (zh) * 2011-12-23 2014-10-15 法商Bic公司 制氢燃料电池盒
CN105090574A (zh) * 2015-08-21 2015-11-25 湖北三江航天红峰控制有限公司 一种适应于高温气体的压力感应开关
CN105889589A (zh) * 2014-10-16 2016-08-24 河南航天液压气动技术有限公司 一种电控先导式高精密大流量调节阀
CN105972224A (zh) * 2016-05-18 2016-09-28 佛山市盈向精密机械科技有限公司 一种用于压铸机的新型电调阀
CN109296790A (zh) * 2018-12-03 2019-02-01 湖南文理学院 一种便于调节耐压限度的泄压控制调节阀
CN109478075A (zh) * 2016-07-28 2019-03-15 彼得罗菲奥伦蒂尼有限公司 用于气体压力调节器的设定装置，具体是用于引导装置，以及包括所述设定装置的气体压力调节系统
CN109798395A (zh) * 2018-12-28 2019-05-24 无锡威孚施密特动力系统零部件有限公司 一种调压阀生产工艺
CN110145621A (zh) * 2019-05-08 2019-08-20 承德高中压阀门管件集团有限公司 一种先导式安全阀
CN111022736A (zh) * 2019-12-20 2020-04-17 广州朗达电子设备有限公司 一种可电动调节压力的蒸发压力调节阀

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102084138A (zh) * 2008-05-06 2011-06-01 伍德沃德Hrt公司 控制阀组件的流体流率特性的方法和装置
CN104106017A (zh) * 2011-12-23 2014-10-15 法商Bic公司 制氢燃料电池盒
CN105889589A (zh) * 2014-10-16 2016-08-24 河南航天液压气动技术有限公司 一种电控先导式高精密大流量调节阀
CN105090574A (zh) * 2015-08-21 2015-11-25 湖北三江航天红峰控制有限公司 一种适应于高温气体的压力感应开关
CN105972224A (zh) * 2016-05-18 2016-09-28 佛山市盈向精密机械科技有限公司 一种用于压铸机的新型电调阀
CN109478075A (zh) * 2016-07-28 2019-03-15 彼得罗菲奥伦蒂尼有限公司 用于气体压力调节器的设定装置，具体是用于引导装置，以及包括所述设定装置的气体压力调节系统
CN109478075B (zh) * 2016-07-28 2022-01-11 彼得罗菲奥伦蒂尼有限公司 用于压力调节器的设定装置以及气体压力的调节系统
CN109296790A (zh) * 2018-12-03 2019-02-01 湖南文理学院 一种便于调节耐压限度的泄压控制调节阀
CN109296790B (zh) * 2018-12-03 2019-09-24 湖南文理学院 一种便于调节耐压限度的泄压控制调节阀
CN109798395A (zh) * 2018-12-28 2019-05-24 无锡威孚施密特动力系统零部件有限公司 一种调压阀生产工艺
CN110145621A (zh) * 2019-05-08 2019-08-20 承德高中压阀门管件集团有限公司 一种先导式安全阀
CN111022736A (zh) * 2019-12-20 2020-04-17 广州朗达电子设备有限公司 一种可电动调节压力的蒸发压力调节阀
CN111022736B (zh) * 2019-12-20 2022-04-22 广州朗达电子设备有限公司 一种可电动调节压力的蒸发压力调节阀

Also Published As

Publication number Publication date
CN1009301B (zh) 1990-08-22

Similar Documents

Publication Publication Date Title
KR890005076B1 (ko) 자동 설정 감압 밸브
CN85105826A (zh) 可自动调整压力的减压阀
GB2156454A (en) Continuously-variable transmission incorporating a slip clutch
AU2016389115B2 (en) Screwing machine
KR101702250B1 (ko) 펌프 용적 제어 장치
CN102782321A (zh) 用于调控静液压机的驱动轴的转矩的调控装置和方法
WO1994005488A1 (en) Breakthrough buffer for presses and control method therefor
US4756156A (en) Drive system with two hydrostatic gears
GB2152640A (en) Hydraulic drive
CN87104851A (zh) 自调压力控制阀
US4860634A (en) Arrangement for controlling the travel of two hydraulic cylinders
KR840009271A (ko) 전동식액추 에이터
JPS5842390B2 (ja) 可変速ベルト駆動装置
US3722267A (en) Hoist-testing apparatus and control system therefor
US5623176A (en) High precision/low hysteresis linear actuator
US4557075A (en) Apparatus for shaping an electrode of a prescribe spatial configuration by means of an abrading die
US4572016A (en) Infinitely variable traction roller transmission
BE1002632A6 (nl) Klep, bij voorkeur regelklep voor het regelen van de gasdruk van gasverwarmingsapparaten.
US2509731A (en) Governing apparatus
US4929217A (en) Variable speed pulley
CN220602585U (zh) 一种精密件检测装置
CN219119695U (zh) 一种平衡缸及机器人
JPS6069373A (ja) 流量調整弁の開度制御装置
SU1276445A2 (ru) Устройство дл уравновешивани подвижного органа
SU1267371A1 (ru) Устройство дл регулировани толщины сло жидкости

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
C13 Decision
C14 Grant of patent or utility model
C17 Cessation of patent right