CN203348692U - 用于纺织机械的气动阀 - Google Patents
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Abstract
本实用新型涉及用于纺织机械的气动阀,其具有控制活塞和可被机械致动的操作件,该控制活塞可轴向移动地安装在具有中心承座的阀体内。本实用新型规定,该气动阀(1)具有阀体(3),所述阀体具有多级式中心承座(4),所述中心承座具有压缩空气输出区域(7)、压缩空气输入区域(6)和导向梯段(5),并且配备有控制活塞(22)、工作活塞(9)和密封件(13),其中该控制活塞(22)具有排气通道(30),视所述气动阀(1)的开关状态而定,该排气通道或是在气动方面与阀出口(26)贯通相连,或是在气动方面与所述阀出口(26)隔断开。
Description
技术领域
本实用新型涉及用于纺织机械的气动阀。
背景技术
在纺织作业的生产车间内,已知存在着通常相对困难的环境条件。就是说,安装在这种生产车间里的纺织机械在其工作期间内常常产生大量的飞花和纺织灰尘,它们随后会积聚在纺织机械的所有构件上。
由于纺织机械的各种构件有些对污染物相对敏感,所以通常在纺织业中投入并非不可观的清洁成本,以维持纺织机械的所有重要构件始终能够工作。
在这种纺织机械中,尤其是执行机械运动的构件以及具有较小公差的机构尤其受到威胁。开关元件例如像气动阀相对于由飞花和纺纱灰尘所造成的污染也较为敏感。就是说,在这种构件中始终存在以下危险,几乎普遍存在的纺纱灰尘和飞花会随着时间推移导致不利影响到这些构件的运动性,或者说干扰到这种气动阀的开关功能。
在DE19539762A1中例如描述一种纺织机械,其工位分别配备有设置在操作高度的圆形纡库用于储存喂给筒子。在圆形纡库下方设置有所谓的筒管滑道,该筒管滑道配设有可启闭的滑道活门并且在功能方面与筒管插放芯杆相关联,该筒管插放芯杆在卷绕期间里固定喂给筒子。在筒管插放芯杆的区域内还安装有拔筒管器,随后借此将已退绕的喂给筒子的筒管清理掉。筒管滑道和筒管插放芯杆通过连杆机构和机械传动机构被连接至驱动机构,在本实施例中为连接至步进马达。
尽管这种已知的自动交叉卷绕络筒机的工位在实践中已被证实是有效的,但这种工位仍然有一些缺点。
这种机械传动机构/连杆机构的一个缺点是,除了源于这种机构的伤害危险外,其还对污染是较为敏感的。
因此,出于前述原因,通常要对这种机械传动机构/连杆机构加以防护,为此它们有些难接近地布置在盖板的后方,这又隐含着危险:必要的清理间歇被大大延后, 甚至被完全忽略了。就是说,在这种工位中,清理间歇对于该传动机构/连杆机构以及配套的气动阀而言通常被延后,除非例如在空筒管/纡管更换时在其中一个工位出现麻烦,例如气动阀功能故障。
实用新型内容
从前述的现有技术出发,本实用新型基于以下任务,研发一种如此提供的用于纺织机械的气动阀,借助这样的气动阀,即使在困难的环境条件下,也能长时间确保可靠有序的工作。
根据本实用新型,该任务将通过具有根据本实用新型的第一方面的气动阀来完成。有利的实施方式是根据本实用新型的其它方面的主题。
根据本实用新型的气动阀具有阀体,阀体具有多级式中心承座。该多级式中心承座具有压缩空气输出区域、压缩空气输入区域和导向梯段。此外,在阀体内布置有控制活塞、工作活塞和密封件,其中该控制活塞具有排气通道。取决于气动阀的开关状态,控制活塞的排气通道或是在气压方面与阀出口贯通相连,或是在气压方面与阀出口隔断开。气动阀的这种实施方式尤其有以下优点,在连接于气动阀的阀出口的气动负载每次泄压时,会自动出现清洁用吹扫气流。就是说,配设有排气通道的控制活塞在气动阀未被操作时始终如此就位,即,在控制活塞与工作活塞之间存在气压连通。
通过这种方式做到了,所连接的气动负载如气缸在气动阀关闭时通过控制活塞的排气通道来自动排气,同时可清洁相关的阀区域和相邻的纺织机械区域。
如本实用新型的第二方面所述,在一个有利的实施方式中规定,在气动阀未打开情况下,分别承受弹簧件作用的控制活塞和工作活塞如此定位,一方面,设于工作活塞的顶侧上的抵接件抵靠该密封件,另一方面,使设于控制活塞底侧上的操作密封环抬离开该工作活塞的抵接件。就是说,在气动阀未打开情况下,工作活塞和控制活塞如此定位,一方面,阀入口与阀出口在气压方面互相隔断开,另一方面,连接至气动阀的阀出口的气动负载在气压方面被贯通连接至该控制活塞的排气通道。
例如存在于被连接至阀出口的气缸中的高压可顺利地经由该控制活塞的排气通道卸压,同时清洁例如操作件区域以及气动阀的开关元件。
根据本实用新型的第三方面,在另一个有利的实施方式中规定,在操作件被致动的情况下,设置在气动阀的控制活塞底侧上的操作密封环密封抵靠在设于工作活塞顶 侧的抵接件上,同时将工作活塞压向这样的位置,在所述位置上,一方面,气动阀的阀入口和阀出口气压连通地相连,另一方面,至控制活塞的排气通道的气动接近入口被封闭。
在气动阀的这种打开位置上,气动负载被连接至高压源并且可以在“向外伸出”的意义上被致动。
此外,如本实用新型的第四方面所述,有利的是该控制活塞配备有耐磨的抵接件以容纳该操作件并且具有密封环,该密封环在阀体盖的导向槽中滑动。
设置耐磨的抵接件带来下列优点,该控制活塞在受到操作件的致动时得到了保护并且能获得很长的寿命,尽管其廉价地由塑料材料制成。另外,通过密封环还可以相对简单地保证气动阀在阀体盖的导向槽区域内被可靠密封,就是说,该气动阀是防止压力损失的。
如本实用新型的第五方面所述的工作活塞的有利实施方式也用于相同的目的。设置在工作活塞的环槽中的密封环在阀体的多级式中心承座的导向梯段中滑动,密封环也阻止在气动阀工作时在工作活塞区域中可能出现压力损失。
根据本实用新型的第六方面,该气动阀的操作件能承受开关元件的作用,该开关元件具有至少一个开关曲线结构。
该气动阀的可轴向移动地安装的操作件在该开关曲线结构中滑动。就是说,在可转动安装的例如可通过步进马达来调节的开关元件中,开关元件的角度调节造成开关曲线结构的空间移位,结果,该操作件移动越过开关曲线结构且同时轴向移动。就是说,当操作件到达其开关曲线结构的端头时,操作件略微轴向移动,由此按规定控制该气动阀。
就此而言,当然也可能有利的是,根据本实用新型的多个气动阀通过一个共同的开关元件来控制,但该开关元件此时当然配备有多个最好是不同的开关曲线结构。
附图说明
以下,将结合附图来详细说明本实用新型,其中:
图1以剖视图示出根据本实用新型的气动阀,其具有未被致动的操作件,就是说该气动阀处于未打开状态;和
图2示出根据图1的气动阀,其具有被致动的操作件,就是说该气动阀处于打开 状态。
具体实施方式
图1和图2分别以剖视图示出了根据本实用新型的气动阀1。
在此,图1示出处于未打开状态的气动阀1,而图2示出处于打开状态的气动阀1。就是说,在根据图1的气动阀中,操作件2未被轴向移动,而图2示出了这样的气动阀1,其操作件2以传力配合方式被致动且同时被轴向移动。
如图1和图2所示,这种气动阀1分别具有阀体3和多级式中心承座4,该阀体优选由塑料制成。
多级式承座4具有导向梯段5、压缩空气输入区域6以及压缩空气输出区域7并通过阀体盖8被朝上封闭。
工作活塞9在多级式承座4的设于阀体3底部的导向梯段5中导向移动,工作活塞9本身配设有环槽10,在该环槽内设有密封11。
工作活塞9在安装状态中朝向密封件13承受第一弹簧件12的作用,该密封件安置在压缩空气输出区域6内。弹簧件12此时支承在垫片14上,通过该垫片,也可根据需要来调节弹簧件12的预紧程度。
优选也由塑料制成的工作活塞9在其顶侧配设有抵接件15,该抵接件由硬质材料如钢制成并且在气动阀1未打开情况下在弹簧件12的作用下以其顶面抵靠该密封件13。
如图1和图2进一步所示,直径明显较大的压缩空气输入区域6与环形导向梯段5相接,在压缩空气输入区域之后是直径还更大的压缩空气输出区域7。
此外,压缩空气输入区域6还具有阀入口16,就是说,在压缩空气输入区域6中设有阀口17,该阀口配设有接头18,例如气动管路19连接至该接头,该气动管路还与高压源20相连。
在与压缩空气输入区域6相接的压缩空气输出区域7中,如上所述地安装有密封件13,第二弹簧件21支承在该密封件13上,第二弹簧件还朝向阀体盖8作用于控制活塞22。就是说,在气动阀1未打开时,承受弹簧力的控制活塞22抵靠着阀体盖8,如图1所示,该阀体盖通过适当的连接机构例如通过螺栓23等与阀体3连接并在此通过密封环24被密封。另外,设于控制活塞22底侧上的操作密封环31以与工作 活塞9的抵接件15相互间隔的方式定位。
压缩空气输出区域7具有阀出口26。就是说,在压缩空气输出区域7中设有阀口25,该阀口配设有接头27,例如气动管路28连接至该接头,该气动管路又与气动负载如气缸29相连。可在压缩空气输出区域7内轴向移动的控制活塞22优选也由塑料制成,该控制活塞具有中央排气通道30、操作密封环31和抵接件32。抵接件32尤其在气动阀1的开关过程中对应于优选呈球形的例如由钢制成的操作件2,该抵接件在优选的实施方式中也由耐磨材料例如钢制成。
如图1所示,当气动阀1未被打开时,就是说在操作件2没有轴向移动时,工作活塞9以其抵接件15抵靠该密封件13,结果,气动阀1的压缩空气输入区域6相对于压缩空气输出区域7在气压方面被截断。
此外,在气动阀1的此开关状态下,控制活塞22受到第二弹簧件21作用处于其终点位置,在该终点位置上,控制活塞22的操作密封环31被抬离开工作活塞9的抵接件15。就是说,控制活塞22被定位在这样的位置上,在所述位置,阀出口26在气压方面与控制活塞22的排气通道30贯通相连。
在气动阀1的此开关位置上,存在于气动负载如气缸29中的高压可通过控制活塞22的排气通道30流出,同时清洁相邻的阀区域。
图2示出了已打开的气动阀1,即这样的气动阀1,其操作件2在开关元件33的作用下已沿轴向下移。在气动阀1的这种开关状态中,控制活塞22以其操作密封环31抵靠工作活塞9的抵接件15,同时不仅相对于在压缩空气输入区域6内存在的高压密封控制活塞22的排气通道30,而且略微向下推移该工作活塞9。在工作活塞9的这种推移过程中,其抵接件15也被顶离开该密封件13,结果,阀入口16和阀出口26在气压方面贯通相连。就是说,连接至阀出口26的气缸29在气压方面与连接至阀入口16的高压源20贯通相连。
如图2进一步所示,气动阀1的操作件2优选通过开关元件33来控制。此外,在开关元件33中加工出至少一个开关曲线结构34,在组装状态中,该气动阀1的操作件2在开关曲线结构34中导向移动。
开关曲线结构34优选以圆弧段的形式构成并且就其位置和构造而言匹配于气动阀1的安装位置及其理想开关过程。
开关元件33还可以具有外齿结构(未示出),例如步进马达可连接至该外齿结构。
Claims (6)
1.一种用于纺织机械的气动阀,具有控制活塞和可被机械致动的操作件,该控制活塞可轴向移动地安装在具有中心承座的阀体内,其特征在于,该气动阀(1)具有包括多级式中心承座(4)的阀体(3),该中心承座具有压缩空气输出区域(7)、压缩空气输入区域(6)和导向梯段(5),并且配备有控制活塞(22)、工作活塞(9)和密封件(13),其中该控制活塞(22)具有排气通道(30),视所述气动阀(1)的开关状态而定,该排气通道或是在气动方面与阀出口(26)贯通相连,或是在气动方面与所述阀出口(26)隔断开。
2.如权利要求1所述的气动阀,其特征在于,在所述气动阀(1)未打开的情况下,分别承受弹簧件(12;21)作用的该控制活塞(22)和该工作活塞(9)如此定位,一方面,设于该工作活塞(9)的顶侧上的抵接件(15)紧贴该密封件(13)且同时在气动方面将该阀入口(16)与该阀出口(26)隔断开,另一方面,使设置在该控制活塞(22)底侧上的操作密封环(31)抬离开该工作活塞(9)的抵接件(15),结果,该阀出口(26)在气动方面与该控制活塞(22)的排气通道(30)贯通相连。
3.如权利要求2所述的气动阀,其特征在于,在该操作件(2)被致动的情况下,设于该控制活塞(22)底侧上的操作密封环(31)密封紧贴在设于该工作活塞(9)的顶侧上的所述抵接件(15)上。
4.如权利要求1所述的气动阀,其特征在于,该控制活塞(22)配备有耐磨的抵接件(32)用于容纳该操作件(2)并且具有密封环(35),该密封环在该阀体盖(8)的导向槽(36)中滑动。
5.如权利要求1所述的气动阀,其特征在于,该工作活塞(9)具有环槽(10)用于容纳密封(11),该密封在该阀体(3)的多级式中心承座(4)的导向梯段(5)中滑动。
6.如权利要求1所述的气动阀,其特征在于,该气动阀(1)的该操作件(2)能承受开关元件(33)的作用,该开关元件具有至少一个开关曲线结构(34)。
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