CN102859245A - 控制阀 - Google Patents

控制阀 Download PDF

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CN102859245A
CN102859245A CN2012800012135A CN201280001213A CN102859245A CN 102859245 A CN102859245 A CN 102859245A CN 2012800012135 A CN2012800012135 A CN 2012800012135A CN 201280001213 A CN201280001213 A CN 201280001213A CN 102859245 A CN102859245 A CN 102859245A
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pilot chamber
mentioned
pilot
signal pressure
pressure path
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CN102859245B (zh
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藤原武
中村雅之
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KYB Corp
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Kayaba Industry Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401Valve members; Fluid interconnections therefor
    • F15B13/0402Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7758Pilot or servo controlled
    • Y10T137/7762Fluid pressure type
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86493Multi-way valve unit
    • Y10T137/86574Supply and exhaust
    • Y10T137/86622Motor-operated
    • Y10T137/8663Fluid motor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86493Multi-way valve unit
    • Y10T137/86574Supply and exhaust
    • Y10T137/8667Reciprocating valve
    • Y10T137/86694Piston valve
    • Y10T137/86702With internal flow passage
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86493Multi-way valve unit
    • Y10T137/86574Supply and exhaust
    • Y10T137/8667Reciprocating valve
    • Y10T137/86694Piston valve
    • Y10T137/8671With annular passage [e.g., spool]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

本发明提供一种控制阀。该控制阀包括:信号压力通路,其用于将第1、第2先导室的先导压力引导为其他设备的信号压力;连通槽,其形成于滑阀,在滑阀处于中立位置时将第1先导室和信号压力通路连通;连通孔,其形成于滑阀,将第2先导室和信号压力通路连通;单向阀,其安装于连通孔,仅容许从第2先导室向信号压力通路的流通;在第1先导室中导入有先导压力,使滑阀移动之后,连通槽将第1先导室和信号压力通路连通,而在第2先导室中导入有先导压力,使滑阀移动之后,连通槽切断第1先导室和信号压力通路的连通。

Description

控制阀
技术领域
本发明涉及一种在先导压力的作用下进行换向、将该先导压力引导到其他设备的控制阀。
背景技术
作为这种控制阀,存在JP2009-013753A所记载的构造。
另外,作为这种控制阀,以往公知有图2所示的构造。图2所示的控制阀在阀体1中装入滑动自由的滑阀2,对滑阀2施加定心弹簧3的弹簧力。滑阀2的两端面向先导室4、5,在被引导到先导室4、5中的任一个先导室的先导压力的作用下,滑阀2进行换向,形成于阀体1的一对驱动器口6、7中的任一个驱动器口连通于泵,另一个驱动器口连通于罐。
在阀体1中形成有用于将先导室4或先导室5的先导压力引导为其他设备的信号压力的信号压力通路8。信号压力通路8通过单向阀9连通于先导室4。单向阀9仅容许工作油从先导室4向信号压力通路8流通。
先导室5通过形成于滑阀2的连通孔10和设置在连通孔10上的单向阀11连通于信号压力通路8。单向阀11仅容许工作油从先导室5向信号压力通路8流通。
在先导室4中导入有先导压力时,滑阀2克服定心弹簧3的弹簧力向图中右方向移动,驱动器口7连通于泵,驱动器口6连通于罐。此时,被引导到先导室4的先导压力推开单向阀9而被引导到信号压力通路8,从信号压力通路8被引导到其他设备。
在先导室5中导入有先导压力时,滑阀2克服定心弹簧3的弹簧力向图中左方向移动,驱动器口6连通于泵,驱动器口7连通于罐。此时,被引导到先导室5的先导压力推开单向阀11而被引导到信号压力通路8,从信号压力通路8被引导到其他设备。
这样,利用控制阀动作的驱动器与其他的设备同步。
在未设置单向阀9、11的情况下,两先导室4、5会通过信号压力通路8相连通。先导室4、5中的一个先导室中导入有先导压力时,另一个先导室连通于维持在大气压的罐,因此,若两先导室4、5通过信号压力通路8相连通,则导入有先导压的先导室4或先导室5中的先导压力将会消失。为了避免这种状况,设有单向阀9、11。
在上述以往的控制阀中,即使为了使换向后的滑阀复位到中立位置而将先导室4或先导室5保持在大气压,由于在信号压力通路8中设有两个单向阀9、11,信号压力通路8的压力有时也不会跑光。因此,其他设备有可能误动作。
发明内容
本发明即是鉴于上述问题点而做成的,其目的在于在使滑阀复位到中立位置之后防止其他设备的误动作。
采用本发明的一种形态,提供一种控制阀,其包括滑动自由地装入在阀体中的滑阀、及面向上述滑阀的两端配置的第1先导室和第2先导室,在被引导到上述第1先导室和上述第2先导室中的任一个先导室中的先导压力的作用下,上述滑阀移动,其中,该控制阀包括:信号压力通路,其形成于上述阀体,用于将上述第1先导室或者上述第2先导室的先导压力引导为其他设备的信号压力;连通槽,其形成于上述滑阀,在上述滑阀处于中立位置时将上述第1先导室和上述信号压力通路连通;连通孔,其形成于上述滑阀,将上述第2先导室和上述信号压力通路连通;单向阀,其安装于上述连通孔,仅容许从上述第2先导室向上述信号压力通路的流通;在上述第1先导室中导入有先导压力,使上述滑阀移动之后,上述连通槽将上述第1先导室和上述信号压力通路连通,而在上述第2先导室中导入有先导压力,使上述滑阀移动之后,上述连通槽切断上述第1先导室和上述信号压力通路的连通。
下面,参照添附的附图详细说明本发明的实施方式及优点。
附图说明
图1是表示本发明的实施方式的控制阀的剖视图。
图2是表示以往的控制阀的剖视图。
具体实施方式
参照图1说明本发明的实施方式的控制阀100。
控制阀100是用于对向驱动器供给工作油或者自驱动器排出工作油进行换向进而控制驱动器的动作的控制阀。
控制阀100包括滑动自由地装入在阀体1中的滑阀12、分别面向滑阀12的两端地配置的第1先导室14和第2先导室15、收装在第1先导室14内并用于对滑阀12的一端部付与弹簧力的作为施力构件的定心弹簧13。
在滑阀12的一端部结合有在第1先导室14内延伸的杆30。在第1先导室14内收容有可沿着杆30的外周滑动的一对弹簧支承构件31、32,定心弹簧13安装在一对弹簧支承构件31、32之间。
在阀体1中形成有用于与驱动器连通的一对驱动器口16、17。
在未对第1先导室14和第2先导室15这两者施加先导压力时,第1先导室14和第2先导室15连通于维持在大气压的罐,滑阀12利用定心弹簧13的施力保持在中立位置。在这种状态下,能够切断通过驱动器口16、17向驱动器供给工作油或者自驱动器通过驱动器口16、17排出工作油,保持驱动器停机的状态。
在根据作业人员的杆操作向第1先导室14和第2先导室15中的一个先导室中导入有先导压力时,在该先导压力的作用下,滑阀12克服定心弹簧13的弹簧力移动,驱动器动作。此时,第1先导室14和第2先导室15中的另一个先导室连通于罐。
具体地讲,在第1先导室14中导入有先导压力,第2先导室15连通于罐,滑阀12克服定心弹簧13的弹簧力向图1中右方移动时,驱动器口17连通于作为液压供给源的泵,驱动器口16连通于罐。由此,从泵送出来的工作油通过驱动器口17被供给到驱动器,并且,工作油自驱动器通过驱动器口16被排出到罐,驱动器向一个方向动作。
在第2先导室15中导入有先导压力,第1先导室14连通于罐,滑阀12克服定心弹簧13的弹簧力向图1中左方移动时,驱动器口16连通于泵,驱动器口17连通于罐。由此,从泵送出来的工作油通过驱动器口16被供给到驱动器,并且,工作油自驱动器通过驱动器口17被排出到罐,驱动器向另一个方向动作。
在阀体1中形成有用于将第1先导室14或第2先导室15的先导压力引导为其他设备的信号压力的信号压力通路18。
在滑阀12的一端的外周面以环状形成有开口于第1先导室14的连通槽19。在滑阀12处于中立位置时,连通槽19将第1先导室14和信号压力通路18连通。
在第1先导室14中导入有先导压力,滑阀12向图1中右方移动时,连通槽19保持与信号压力通路18的连通状态,将第1先导室14和信号压力通路18连通,相反,在第2先导室15中导入有先导压力,滑阀12向图1中左方移动时,连通槽19与信号压力通路18分离,切断第1先导室14和信号压力通路18的连通。
在滑阀12中形成有用于将第2先导室15和信号压力通路18连通的连通孔20。在连通孔20中安装有仅容许自第2先导室15向信号压力通路18流通的单向阀21。
接着,说明控制阀100的作用。
在第1先导室14中导入有先导压力,滑阀12在先导压力的作用下而向图1中右方移动时,驱动器口17连通于泵,驱动器口16连通于罐。此时,连通槽19保持与信号压力通路18的连通状态,因此,第1先导室14的先导压力通过连通槽19被引导到信号压力通路18。但是,由于在连通孔20上安装有单向阀21,因此,第1先导室14的先导压力不会通过信号压力通路18和连通孔20自第2先导室15跑出到罐中。
滑阀12在向图1中右方移动到之后复位到图1所示的中立位置时,第1先导室14还通过连通槽19连通于信号压力通路18,因此,信号压力通路18的压力会通过连通槽19自第1先导室14跑出到罐中。因而,压力不会封闭在信号压力通路18中,连接于信号压力通路18的其他设备不会误动作。
在第2先导室15中导入有先导压力,滑阀12在先导压力的作用下向图1中左方向移动时,驱动器口16连通于泵,驱动器口17连通于罐。此时,被引导到第2先导室15的先导压力流入到连通孔20中,推开单向阀21被引导到信号压力通路18。此时,由于连通槽19与信号压力通路18分离,因此,第2先导室15的先导压力不会通过信号压力通路18自第1先导室15跑出到罐中。
如果滑阀12在向图1中左方移动到之后复位到图1所示的中立位置,由于连通槽19与信号压力通路18连通,因此,信号压力通路18的压力会通过连通槽19自第1先导室14跑出到罐中。因而,压力不会滞留在信号压力通路18中,连接于信号压力通路18的其他设备不会误动作。
采用以上的实施方式,起到以下所示的效果。
在滑阀12处于中立位置时,由于信号压力通路18通过连通槽19连通于第1先导室14,因此信号压力通路18必定连通于罐。因而,压力不会封闭在信号压力通路18中,其他设备不会误动作。
另外,在滑阀12在第1先导室14的先导压力的作用下移动时,第1先导室14与信号压力通路18的连通通过连通槽19来维持,而且,利用单向阀21切断工作油从第1先导室14向第2先导室15的流动,因此,能够可靠地将信号压力通过信号压力通路18引导到其他的设备。
另外,在滑阀12在第2先导室15的先导压力的作用下移动时,第2先导室15与信号压力通路18通过连通孔20连通,而且,通过连通槽19与信号压力通路18离开来切断工作油从第2先导室15向第1先导室14的流动,因此,能够可靠地将信号压力通过信号压力通路18引导到其他的设备。
并且,不仅能实现在滑阀12受到第1及第2先导室14、15的先导压力的作用而移动时,第1先导室14和第2先导室15不连通的结构,而且相比于以往技术,能够减少一个单向阀的数量,从而能够减少零件数量。
以上,对本发明的实施方式进行了说明,但上述实施方式只不过表示了本发明的应用例的一种,并不是将本发明的技术范围限定为上述实施方式的具体构造的意思。
本申请基于2011年3月16日在日本国专利局申请的日本特愿2011-057663主张优选权,通过参照将该申请的全部内容编入到本说明书中。
产业上的可利用性
本发明能够应用于使与利用先导压力换向的换向阀相连接的驱动器和其他设备同步的控制装置。

Claims (1)

1.一种控制阀,其包括滑动自由地装入在阀体中的滑阀、及面向上述滑阀的两端地配置的第1先导室和第2先导室,在被引导到上述第1先导室和上述第2先导室中的任一个先导室中的先导压力的作用下,上述滑阀移动,其中,
该控制阀包括:
信号压力通路,其形成于上述阀体,用于将上述第1先导室或者上述第2先导室的先导压力引导为其他设备的信号压力;
连通槽,其形成于上述滑阀,在上述滑阀处于中立位置时将上述第1先导室和上述信号压力通路连通;
连通孔,其形成于上述滑阀,将上述第2先导室和上述信号压力通路连通;
单向阀,其安装于上述连通孔,仅容许从上述第2先导室向上述信号压力通路的流通;
在上述第1先导室中导入有先导压力,使上述滑阀移动之后,上述连通槽将上述第1先导室和上述信号压力通路连通,而在上述第2先导室中导入有先导压力,使上述滑阀移动之后,上述连通槽切断上述第1先导室和上述信号压力通路的连通。
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