CN109282050B - 真空集便器闸板阀 - Google Patents
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Abstract
真空集便器闸板阀,包括相互扣合的上夹板和下夹板、位于上夹板与下夹板之间的闸板,以及气缸、分别安装在齿轮轴两端的从动齿轮和主动齿轮;闸板包含彼此呈品字型分布的三部分,开通区、阻断区,最后为驱动区和驱动区;上夹板与下夹板的通污孔周边均设有环形槽,环形槽内镶嵌有空心密封圈;气缸的活塞杆前部有齿条与驱动齿相咬合,齿条由气缸驱动;上下夹板上的通污孔与闸板上的通孔相重合则闸板阀开通,当上下夹板上的通污孔与闸板上的阻断区相重合时闸板阀关闭。本发明设计了一种“自适应O形圈”;这种O形圈对闸板的正压力在一定范围内随压力腔压力变化而变化;本发明结构合理、性能可靠从而可减少高铁集便系统维修工作量,降低应用成本。
Description
技术领域
本发明涉及一种真空集便器闸板阀,用于对飞机、高铁和公路客运车辆等装备上的真空集便系统排污通道开关的控制,属于客运交通工具的集便系统技术领域。
背景技术
真空集便系统污物通道所需阀门有别于一般集便系统的通用阀门,对阀门的可靠性、耐久性有着更高的要求。以高铁为例,一旦高铁集便系统出了问题卫生间必须立即停用,不但影响乘客使用对于乘车环境也会造成严重破坏,而阀门在该系统中扮演了极其重要的角色;随高铁引进的国外真空式集便技术虽然在功能上满足了应有的要求,但经过十年使用集便系统的阀门经常出现漏气、啸叫、失灵等故障,使得集便系统供应商的售后服务不堪重负。进口碟阀、滑阀是便池至污物箱通道上的关键通断控制部件,碟阀和滑阀的工作原理都是通过在狭缝里插入一块开有圆孔的钢板达到阻断或允许污物通过管道之目的(业内统称为铡板阀),其区别在于碟阀的闸板动作是旋转运动,滑阀动作为平动;就碟阀而言,因其传动机构把扭矩加在了悬臂轴上,并且驱动碟阀工作的汽缸处于漂浮装态,可以说结构严重不合理,滑阀结构更复杂这里不再详述;当然更重要的还是密封问题未能得到很好地解决,尽管原设计用尽了手段;碟阀和滑阀动作时一般承受的压力一般在30Kp至50Kp负压,保证在此压力下不漏气,对闸板和密封圈间的压力要求也比较小,闸板动作是在这种状态下进行的,密封圈对闸板运动的阻力也比较小;而在中转式真空集便器上还需要承受300Kp至500Kp正压力,为保证密封要求闸板和密封圈间的压力更大,如果按照这个压力调整闸板和密封圈间的压力,密封圈对闸板运动的阻力就会很大。碟阀和滑阀使用一段时间后就会发现一部分漏气已成为一种常态;污物箱内需要保持一定负压,这就需要经常启动真空发生器来维持污物箱中的真空度,从而造成列车宝贵风愿的浪费;这就需要进行维修,可以想象在一个输送大小便的管道上实施维修或更换一个部件会多么不情愿。
就这样一只结构不合理、性能不稳定、密封性不好进口碟阀需要花费近万元,正是这些众多的进口部件抬高了高铁的造价。
鉴于此,有必要重新考虑闸板阀传动机构以保证闸板阀动作可靠,同时用一种空心密封圈改善闸板阀密封性能,从而减少高铁集便系统维修工作量,降低高铁集便系统运营成本。
发明内容
本发明针对便池至污物箱通道上的碟阀、滑阀存在的漏气和故障率高的问题,提出一种重新考虑闸板阀传动机构和改变密封件结构的新方案以改善进口蝶阀和滑阀故障率高、密封性能不佳和操作阻力大等不足;该阀结构简单,符合机械设计一般规律,设计出空心密封圈并提出密封压力自适应的概念;这对稳定闸板阀性能、降低故障率和减少成本具有十分重要的意义。
一种真空集便器闸板阀,其特征在于包括相互扣合的上夹板和下夹板、位于上夹板与下夹板之间的闸板,以及气缸、分别安装在齿轮轴两端的从动齿轮和主动齿轮、以及安装架和盖板;
所述闸板为异形板状结构,闸板包含彼此呈品字型分布的三部分,其中一部分为开有通孔的开通区,一部分堵塞上下夹板通污孔的阻断区,最后为驱动区,实为部分齿轮,中部有一轴孔,驱动区外缘有一条排列成圆弧形的驱动齿;所述轴孔内装有闸板轴,闸板轴两端分别安装在夹板与下夹板内侧的轴承上;从而使闸板安装于相互扣合的上夹板与下夹板之间;
所述上夹板、下夹板均设有直径相同的通污孔,上夹板与下夹板的通污孔周边均设有环形槽,环形槽内镶嵌有空心密封圈,且空心密封圈分别压在闸板两侧;上夹板、下夹板和闸板叠装后与安装架相固定;
所述气缸的活塞杆前部有齿条,所述主动齿轮与驱动齿相咬合,从动齿轮和主动齿轮紧固在同一齿轮轴上,从动齿轮与齿条相咬合,齿条由气缸驱动;气缸装配在安装架上,安装架外侧有盖板,所述齿轮轴两端由下夹板和盖板支撑。上下夹板上的通污孔与闸板上的通孔相重合则闸板阀开通,当上下夹板上的通污孔与闸板上的阻断区相重合时闸板阀关闭。
所述的一种真空式集便器闸板阀,其特征在于所述空心密封圈的底部有一圈环形工艺开口,空心密封圈内部的环形空腔,在空心密封圈嵌入上下夹板前自然状态下空心密封圈呈开口状,空心密封圈放入环形槽后环形开口因受力而闭合,形成实际意义上的空心密封圈。
可通过选择R1(外径)和R2(内径)值、或改变密封圈硬度来改变摩擦阻力,并在一定范围内调整密封空间可承受压力的能力。以及底部的偏转角β来调整松紧度。
本发明是为高铁排污系统设计,也适用于普通客运列车、大型客运汽车乃至客运飞机等所有带有真空集便系统的装备。为此我们设计了一种空心O形圈也叫“自适应O形圈”;这种O形圈对闸板的正压力在一定范围内随压力腔压力变化而变化,从而达到密封圈对闸板运动的阻力不增加的前提下,保证更高压力下不泄露。
本发明具有如下显著优点:
本发明把碟阀传动机构扭矩从悬臂轴上转移至闸板上,并将驱动碟阀工作的汽缸由漂浮装态变为固定状态,使得结构得以符合机械设计基本原则,故障率必然降低。本发明结构合理、性能可靠从而可减少高铁集便系统维修工作量,降低应用成本。
本发明提出了空心密封圈概念可通过选择R1和R2值或改变密封圈硬度改变摩擦阻力,并可以在一定范围内调整密封空间可承受压力的能力进行设计。
本发明体积较碟阀有所减小,即可取代现有进口蝶阀也可完全取代进口滑阀,减少一个品种的部件对高铁生产、维修及管理都有十分重要的意义。
本发明结构简单、价格低廉对降低高铁集便系统造价可以算作一份贡献。
附图说明
图1是本发明的正视图。
图2是本发明的阀体剖面图。
图3是本发明的外形示意图。
图4是本发明的内部结构图。
图5是本发明的环形槽与空心密封圈的局部剖面图。
图6是本发明的闸板结构示意图。
图7是本发明的空心密封圈自然状态断面示意图。
其中,1、闸板,2、空心密封圈,3、闸板轴,4、上夹板,5、下夹板,6、安装架,7、气缸,8、齿条,9、从动齿轮,10、齿轮轴,11、主动齿轮,12、盖板,13、通污孔,101、轴孔, 102、驱动齿,103、通孔,104、阻断区。
具体实施方式
本发明的真空式集便器闸板阀各部分结构如图1-7所示。
为了适用现有的真空集便系统的结构,上夹板4和下夹板5设计成亏月形。
所述的真空式集便器闸板阀之闸板1与齿轮如图6所示,齿轮模数取值为1,完整齿轮齿数为60,此处只需要齿轮的一部分见102;101为齿轮轴孔,也是闸板1的中心轴孔,在驱动齿轮的作用下可推动闸板1旋转;闸板1上的通污孔103旋转至与上下夹板的通污孔重合时闸板阀打开,当阻塞区104与上下夹板的通污孔重合时闸板阀关闭,通污孔103直径取值46mm;
所述的真空式集便器闸板阀之空心密封圈2在自然状态下是开口装,只有放入密封槽后内外才处于封闭态;可通过选择R1和R2值(或改变密封圈硬度)改变摩擦阻力,本设计R1取值为3,R2取值为2,硬度取值为85,可承受最大压力450kP。
因此,本闸板阀包括夹在亏月形上夹板4和下夹板5之间的闸板1、镶嵌在两夹板通污孔周边环形槽内、压在闸板1上的空心密封圈2、通过与上下夹板和闸板1的轴孔101同心的闸板轴3相互定位,从动齿轮9与驱动齿102相咬合,主动齿轮11和从动齿轮9紧固在齿轮轴10上,主动齿轮11与齿条(活塞杆)8相咬合,齿条(活塞杆)8由气缸7驱动;气缸7装配在安装架6上,齿轮轴10由下夹板5和盖板12支撑,和盖板12和盖板12与安装架6相互紧固。上下夹板上的通污孔与闸板1上的通污孔103相重合闸板阀开通,当上下夹板上的通污孔与闸板1上的阻断区104相重合时闸板阀关闭。
Claims (1)
1.一种真空集便器闸板阀,其特征在于包括相互扣合的上夹板(4)和下夹板(5)、位于上夹板(4)与下夹板(5)之间的闸板(1),以及气缸(7)、分别安装在齿轮轴(10)两端的从动齿轮(9)和主动齿轮(11)、安装架(6)和盖板(12);
所述闸板(1)包含彼此呈品字型分布的三部分,其中一部分为开有通孔(103)的开通区,一部分堵塞上下夹板通污孔(13)的阻断区(104),最后为驱动区,驱动区中部有一轴孔(101),驱动区外缘有一条排列成圆弧形的驱动齿(102);所述轴孔(101)内装有闸板轴(3),闸板轴(3)两端分别安装在上夹板(4)与下夹板(5)内侧的轴承上;从而使闸板(1)安装于相互扣合的上夹板(4)与下夹板(5)之间;
所述上夹板(4)、下夹板(5)均设有直径相同的通污孔(13),上夹板(4)与下夹板(5)的通污孔(13)周边均设有环形槽,环形槽内镶嵌有空心密封圈(2),且空心密封圈(2)分别压在闸板(1)两侧;上夹板(4)、下夹板(5)和闸板(1)叠装后与安装架(6)相固定;
所述气缸(7)的活塞杆前部有齿条(8),所述主动齿轮(11)与驱动齿(102)相咬合,从动齿轮(9)和主动齿轮(11)紧固在同一齿轮轴(10)上,从动齿轮(9)与齿条(8)相咬合,齿条(8)由气缸(7)驱动;气缸(7)装配在安装架(6)上,安装架(6)外侧有盖板(12),所述齿轮轴(10)两端由下夹板(5)和盖板(12)支撑;上下夹板上的通污孔(13)与闸板(1)上的通孔(103)相重合则闸板阀开通,当上下夹板上的通污孔与闸板(1)上的阻断区(104)相重合时闸板阀关闭;
所述空心密封圈(2)的底部有一圈环形工艺开口,空心密封圈(2)内部的环形空腔,在空心密封圈(2)嵌入上下夹板前自然状态下空心密封圈(2)呈开口状,空心密封圈(2)放入环形槽后环形开口因受力而闭合;
所述的空心密封圈(2)可承受最大压力450kP。
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