CN1564913A - 阀驱动用作动器 - Google Patents
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- F15B11/036—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
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- F16K31/163—Actuating devices; Operating means; Releasing devices actuated by fluid with a mechanism, other than pulling-or pushing-rod, between fluid motor and closure member the fluid acting on a piston
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- F16K35/00—Means to prevent accidental or unauthorised actuation
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- F15B2211/00—Circuits for servomotor systems
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- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
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- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
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- F15B2211/00—Circuits for servomotor systems
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- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
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- F15B2211/00—Circuits for servomotor systems
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- F15B2211/405—Flow control characterised by the type of flow control means or valve
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- F15B2211/40584—Assemblies of multiple valves the flow control means arranged in parallel with a check valve
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- F15B2211/00—Circuits for servomotor systems
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Abstract
一种阀驱动用作动器,包括:将各活塞分别在所述活塞轴的轴心方向滑动自如地进行支承的左右气缸;将由所述活塞隔开的左气缸的左侧缸室与右气缸的左侧缸室连通的第1连通道;将由所述活塞隔开的左气缸的右侧缸室与右气缸的右侧缸室连通的第2连通道;将朝所述活塞轴的轴心方向的往复运动转变为旋转运动的转换装置,其特征在于,所述第1及第2连通道在所述左右气缸的支承构件或其周围形成。本发明,能提供一种不使阀驱动用作动器大型化、不会带来成本上升、而且不会使活塞的受压面积减小的作动器。
Description
技术领域
本发明涉及对用于驱动将活塞的往复运动转变成旋转运动后传递至阀驱动轴的蝶阀、球阀等的阀驱动用作动器的改良,尤其是涉及一种设置2个上述活塞,通过供给其左右形成的气缸室的流体的压力推压各个活塞而使其朝轴心方向驱动的阀驱动用作动器。
背景技术
传统的蝶阀驱动用旋转式作动器R0如图1所示,在泵等压力源101、罐102与旋转式作动器103之间设置4通切换阀104。图示状态下,从压力源101排出的压力油、压力空气类的工作流体经过流量调节阀105而流入左边的气缸109的左侧缸室106内,其中一部分经过管道107流入右边的气缸110的左侧缸室108内,将嵌入气缸109、110内的活塞111、112朝箭头X方向进行推压。通过该活塞111、112的滑动,从缸室113、114排出的流体通过流量调节阀115,并从4通切换阀104放出至罐102内。
为了将活塞朝反方向移动,将4通切换阀104朝箭头Y方向进行切换。通过这样的流体线路的切换,活塞111、112及连接两个活塞的活塞连杆116一体地进行往复运动。嵌接固定于一方的活塞连杆116的耳轴117上植设有耳销118,该耳销118插入轭铁(yoke)121的轭槽122内,该轭铁121旋转自如地固接在阀驱动轴120上,一旦活塞111、112朝左右往复运动,则耳销118一边推压轭槽122的侧壁一边在槽122内滑动。由此,轭铁121摆动,与驱动轴120连接的蝶阀转动。这种利用轭铁将往复运动转变为旋转运动的机构称为止转棒轭(scotch yoke),具有上述耳销118、轭槽122的轭铁121是转换装置的一个例子。
这种阀驱动用旋转式作动器R0比如在日本专利实用新型公报昭和63年第32961号及公开实用新型公报平成6年第733405号中有记载。
上述传统公知的旋转式作动器R0中,转动1个阀驱动轴120使用2个活塞,因此与诸如日本专利特开2000-104706号记载的仅用1个活塞的传统例子相比,具有能得到大的驱动力的优点。
但是,比如日本专利实用新型公报昭和63年第32961号记载的传统的公知的阀驱动用作动器中,利用外部配管107等将压力流体从1个缸室分配至另一个缸室,这外部配管107等不仅造成作动器的大型化,而且另外需要配管用的构件,造成成本增加。
另外,上述日本专利公开实用新型公报平成6年第73405号中,从缸室至缸室的压缩空气的配管形成于与上述活塞连杆116相当的杆内,故不会造成作动器的大型化,但上述活塞需要一定的强度,而将内部做成中空以形成配管会导致活塞连杆的强度下降,不能说是最佳结构。当然,只要增加活塞连杆的尺寸就能解决强度的问题,但又会产生活塞的受压面积相应地减少的问题、或为了保证受压面积而使作动器大型化的问题。
有鉴于此,本发明的目的在于提供一种不使阀驱动用作动器大型化,也不会带来成本上升,而且具有不会使活塞的受压面积减小的从缸室至缸室的配管结构的阀驱动用作动器。
发明内容
为了达到上述目的,本发明的阀驱动用作动器包括:
左右两端分别固设有活塞的活塞轴;
将上述各活塞分别在上述活塞轴的轴心方向滑动自如地进行支承的左右气缸;
将由所述活塞隔开的左气缸的左侧缸室与右气缸的左侧缸室连通的第1连通道;
将由所述活塞隔开的左气缸的右侧缸室与右气缸的右侧缸室连通的第2连通道;
将朝所述活塞轴的轴心方向的往复运动转变为旋转运动的转换装置,
其特征在于,
所述第1及第2连通道在所述左右气缸的支承构件或其周围形成。上述右、左之词并不具有绝对的含义,仅用作相对的意思。
另外,作为上述支承构件的一例,可以考虑将左侧缸室的左侧壁构件及右侧缸室的右侧壁构件与作动器本体进行连接支承的支承螺栓。
附图的简单说明
图1是表示本发明的传统技术的空气回路图,
图2是表示本发明的实施形态的阀驱动用作动器的侧剖面图,
图3是表示包括同一作动器的局部剖面的俯视图,
图4是表示图3中的A-A线剖面图,
图5是表示图3中的B-B线剖面图,
图6是表示图3中的C-C线剖面图。
具体实施方式
下面,参照附图对本发明的具体实施形态进行说明,以利对本发明的理解。
图2~图4所示的本实施形态的旋转式作动器R1大致包括:左右两端分别固设有活塞24L、24R的活塞轴32;将上述各活塞24L、24R分别在上述活塞轴32的轴心方向滑动自如地进行支承的左右气缸22L、22R;将由所述活塞24L隔开的左气缸22L的左侧缸室17LL与右气缸22R的左侧缸室17RL连通的左侧连通道(第1连通道);将由所述活塞24L隔开的左气缸22L的右侧缸室17LR与右气缸22R的右侧缸室17RR连通的右侧连通道(第2连通道);将朝所述活塞轴32的轴心方向的往复运动转变为阀驱动轴36(图4)的旋转运动的、由轭铁34、35及销33等构成的转换装置,这方面与传统的旋转式作动器R1(图1)相同。但是,所述左侧连通道(第1连通道)及右侧连通道(第2连通道)作为28L、28R,在用于将所述左右气缸22L、22R连接支承于作动器本体即中心体21的支承构件即拉杆26a、26b的周围形成,在这方面与传统的旋转式作动器R0有根本的区别。以下进行详细叙述。不过拉杆仅是支承螺栓的一个例子。
首先,旋转式作动器R1是以中心体21为中心构成的,该中心体21对驱动作为驱动对象的蝶阀和球阀等的上述阀驱动轴36旋转自如地进行支承。上述中心体21分别在右侧连接有右侧气缸22R,在左侧连接有左侧气缸22L。
上述左气缸22L的左侧开口及右气缸22R的右侧开口分别由盖29及23关闭成密封状。
另外,活塞轴32朝左右方向滑动自如地支承于上述中心体21上。该活塞轴32的左右端部插入上述左右气缸22L、22R内,分别通过螺母30、31固接在上述左右端部上的左侧活塞24L和右侧活塞24R,并分别在左侧气缸22L及右侧气缸22R的内面滑动自如地加以支承。
因此,通过上述中心体21和左侧盖29关闭两端的左侧气缸22L内部的缸室被上述左侧活塞24L分割成左侧缸室17LL和右侧缸室17LR。另外,通过上述中心体21和右侧盖23关闭两端的右侧气缸22R内部的缸室被上述右侧活塞24R分割成左侧缸室17RL和右侧缸室17RR。
图3所示的上述盖23、29上形成的贯通孔27a、27a中贯通有第1拉杆26a,另外,在贯通孔27b、27b内分别贯通有第2拉杆26b,通过将螺合在各拉杆26a、26b的端部螺纹部上的螺母19紧固,将气缸22R、22L紧固在盖23、29与中心体21之间而加以支承。即,拉杆26a、26b是气缸22R、22L的支承构件的一个例子。
图2及图4所示的销33旋转自如地安装在上述活塞轴32的中央部。如图4所示,上述销33旋转自如地与2根轭铁34、35的端部卡合,该轭铁34、35与旋转自如地安装在上述中心体21上的上述阀驱动轴36正交且滑动自如地安装在该阀驱动轴36上。上述销33、轭铁34、35是转换装置的1个例子。
而且,在上述中心体21形成空气连接口16R和空气连接口16L,该空气连接口16R通过空气通道46R将作为工作流体的空气输入缸室17RL,该空气连接口16L通过空气通道46L将作为工作流体的空气输入缸室17LR。上述空气连接口16R、16L经由图1所示的流量调节阀105、115与压力源101连接。
而且,左侧连通道28L经由图3所示的空气通道18R与上述空气连接口16R连接,右侧连通道28R借助空气通道18L(参照图5)与空气连接口16L连接。图5表示空气通道18L,而空气通道18R可用与图5上下对称的图来表示,故在此省略。
连通道28L、28R是由以下各空气通道连通的状态下构成的,这些空气通道包括:空气通道28La、28Ra,其由贯通穿过中心体21的拉杆26a、26b的贯通孔45a、45b的中径部45a′、45b′与拉杆26a、26b之间的间隙构成;空气通道28Lb、28Rb,其由贯通穿过盖29、23的拉杆26a、26b的上述贯通孔27a、27b的中径部27a′、27b′与拉杆26a、26b之间的间隙构成;空气通道28Rc、28Lc,其由一端插入与上述中心体21的上述中径部45a′、45b′同轴的大径部45a″、45b″内、另一端插入与盖23、29的上述中径部27a′、27b′同轴的大径部27a″、27b″内、上述拉杆26a、26b贯通其内部的中空管子25a、25b与拉杆26a、26b之间的间隙构成;空气通道28Ld、28Rd(参照图6)、其将在上述盖29、23上分别形成的上述空气通道28Lb、28Rb与缸室17LL、17RR进行连接。图6表示空气通道28Ld,空气通道28Rd可用与图6左右对称的图表示,故这里省略。
因此,对图2的箭头所示那样将活塞轴32朝右方向移动,将轭铁34、35朝图2中的逆时针方向转动,将阀驱动轴36朝逆时针方向转动的场合的压缩空气的流动进行说明。
在此场合,来自压力源101(图1)的压缩空气从空气连接口16R流经空气通道46R供给右侧气缸22R的左侧缸室17RL。由此朝箭头方向对右侧活塞24R施力。另外,供给上述空气连接口16R的压缩空气流经与空气连接口16R连接的空气通道18R并依次通过空气通道28La、28Lc、28Lb、28Ld供给左侧气缸22L内的左侧缸室17LL内。因此,朝箭头方向对左侧活塞24L施力。通过活塞24L、24R朝箭头方向的移动,从缸室17LR推压出的空气流经空气通道46L向空气连接口16L排出。另外,从缸室17RR推压出的空气通过连通道28Rd、28Rb、28Rc、28Ra、18L向空气连接口16L排出。
这样,本实施形态中,由于驱动阀驱动轴36的活塞轴32由2个活塞24R、24L施力,故能提供驱动力大的旋转式作动器。
相反,在将活塞轴32朝与箭头相反的方向驱动、而将阀驱动轴36朝图2中的顺时针方向旋转的场合,来自压力源101(图1)的压缩空气从空气连接口16L流经空气通道46L供给左侧气缸22L的右侧缸室17LR。由此朝与箭头相反的方向对左侧活塞24L施力。另外,供给上述空气连接口16L的压缩空气流经空气通道18L并依次通过空气通道28Ra、28Rc、28Rb、28Rd供给右侧气缸22R的右侧缸室17RR内。因此,朝与箭头相反的方向对右侧活塞24R施力。
通过活塞24L、24R朝与箭头相反的方向的移动,从缸室17RL推压出的空气流经空气通道46R向空气连接口16R排出。另外,从缸室17LL推压出的空气通过连通道28L(28Ld、28Lb、28Lc、28La)、18R向空气连接口16R排出。
朝箭头方向或相反方向驱动的活塞轴32其前端与用螺母38固定在盖23或29上的起制动件作用的螺栓37碰撞而在正确的位置停止。
39是在阀驱动轴36上形成的阀安装孔。另外,40是用于将作动器R1安装在阀本体上的安装孔。
上述实施形态中对第1、第2连通道形成于拉杆周围的场合进行了说明,但此仅为一例,也可在拉杆本身中形成或在拉杆以外的支承构件中设置。
本发明设置在各种阀的驱动作动器中。比如,蝶阀是其一例,当然也可适用于其他球阀等。
以上所述的本发明的阀驱动用作动器包括:
左右两端分别固设有活塞的活塞轴;
将上述各活塞分别在上述活塞轴的轴心方向滑动自如地进行支承的左右气缸;
将由所述活塞隔开的左气缸的左侧缸室与右气缸的左侧缸室连通的第1连通道;
将由所述活塞隔开的左气缸的右侧缸室与右气缸的右侧缸室连通的第2连通道;
将朝所述活塞轴的轴心方向的往复运动转变为旋转运动的转换装置,其特征在于,
所述第1及第2连通道在所述左右气缸的支承构件或其周围形成。因此,本发明中由于上述连通道在对无论何种阀驱动用作动器中本来就需要的气缸进行支承的支承构件本身或其周围形成,故作动器不会大型化,也不会产生活塞连杆的强度下降的问题,可提供价廉的阀驱动用作动器。
作为上述支承构件的一例,可在采用将左侧缸室的左侧壁构件及右侧缸室的右侧壁构件与作动器本体进行连接支承的螺栓的场合实施而无需改变作动器的外形尺寸。
Claims (2)
1.一种阀驱动用作动器,包括:
左右两端分别固设有活塞的活塞轴;
将所述各活塞分别在所述活塞轴的轴心方向滑动自如地进行支承的左右气缸;
将由所述活塞隔开的左气缸的左侧缸室与右气缸的左侧缸室连通的第1连通道;
将由所述活塞隔开的左气缸的右侧缸室与右气缸的右侧缸室连通的第2连通道;
将朝所述活塞轴的轴心方向的往复运动转变为旋转运动的转换装置,
其特征在于,
所述第1及第2连通道在所述左右气缸的支承构件或其周围形成。
2.如权利要求1所述的阀驱动用作动器,其特征在于,所述支承构件是将左侧缸室的左侧壁构件及右侧缸室的右侧壁构件与作动器本体进行连接支承的支承螺栓。
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CN113795678A (zh) * | 2019-05-17 | 2021-12-14 | 阿尔弗雷德杰格有限公司 | 模块化的气动缸和气动缸在电机主轴中的应用 |
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KR101116813B1 (ko) * | 2010-03-22 | 2012-02-28 | 한라아이엠에스 주식회사 | 밸브 구동용 액추에이터 |
KR200464536Y1 (ko) * | 2011-11-02 | 2013-01-08 | 대성전기공업 주식회사 | 회전형 액츄에이터 |
KR101367066B1 (ko) * | 2012-01-12 | 2014-02-24 | 신상열 | 공압을 이용한 밸브 개폐용 액츄에어터 |
US11028923B2 (en) * | 2015-06-11 | 2021-06-08 | Hamilton Sundstrand Corporation | High vibration pneumatic piston assembly made from additive manufacturing |
EP3290719B1 (en) * | 2016-08-31 | 2019-07-17 | Goodrich Actuation Systems SAS | Seal arrangement for an actuator |
KR200484298Y1 (ko) | 2017-03-20 | 2017-09-05 | 장귀경 | 엘리베이터 도어 실 보강 프레임 |
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US20230008971A1 (en) * | 2019-12-02 | 2023-01-12 | Shailesh SHARMA | Methods and systems relating to improvements in reliability of fluid power actuators |
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JPS55102405A (en) | 1979-01-31 | 1980-08-05 | Shin Etsu Polymer Co Ltd | Gas exchanger |
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