The utility model belongs to the field of domestic gas, in particular to an overcurrent cut-off device, which comprises a filter screen, a shell, a sealing ring and a valve core. The lower end of the filter screen is provided with the shell, the inner part of the shell is provided with the sealing ring, the valve core is arranged on the sealing ring, the spring is arranged between the valve core and the sealing ring, and the O-ring is arranged outside the shell. When the cut-off device of the utility model is closed, the valve core contacts with the rubber ring, the rubber ring wraps the valve core, overcomes the reaction force of the spring, and solves the defect of the automatic reset of the valve core. The shell and the filter screen are assembled as a whole, the rubber ring is assembled on the shell, and the filter screen presses the rubber ring to form a seal. The shell and the filter screen are respectively provided with a valve core guide hole, during the sliding process of the valve core The guide hole shall not fall off all the time, so as to solve the defect of easy eccentric sliding of valve core. Because the valve core and rubber ring are in contact and sealed, the rubber ring contact part is thin and has good elasticity, which reduces the manufacturing difficulty of valve core and assembly difficulty.
【技术实现步骤摘要】
过流切断装置
本技术属于家用燃气领域,具体是涉及过流切断装置。
技术介绍
现在市面上已经出现了具有过流切断的燃气过流切断装置,安装于燃气用具前端的管道安全阀门上,当燃气用具前端的软管故障发生燃气泄漏,该装置会自动切断燃气,防止燃气泄漏,普通的过流切断装置在燃气流动产生的推力作用于阀芯内球面上,推动阀芯往前移动,同时弹簧会根据推力大小产生不同程度的被压缩,当阀芯完全被推到外壳内端面时,通路被切断,燃气停止流动。当阀芯失去推力时在弹簧反作用力下阀芯会自动退回原始位置,打开燃气通路但是这种过流切断装置在发生燃气流量过大导致切断装置关闭,很有可能是因为燃气泄漏造成,在恢复正常流量前,过流切断装置会发生自动回位,燃气继续泄漏;当燃气流动产生的推动力直接作用在阀芯内球面上,当作用推力不是均布在内球面上时,阀芯与支架之间的滑动导向长度较短,导致阀芯移动不会与中心轴同心,最后与外壳上的内端面接触就是偏心的,导致关闭不严还会有燃气泄漏;这种结构的过流切断装置不带过滤网,燃气管道杂质容易进入,附着在阀芯球面上,导致切断装置关闭后还会有燃气通过的缝隙;阀芯外圆球尺寸精度与外壳的内端面尺寸精度要求极高,制作难度大。
技术实现思路
本技术的目的就在于提供过流切断装置。本技术所采用的技术方案如下:过流切断装置,包括过滤网、外壳、密封圈、阀芯,所述过滤网下端设置有所述外壳,所述外壳内部设置有所述密封圈,所述阀芯设置在所述密封圈上,所述阀芯和所述密封圈之间设置有弹簧,O型圈设置在所述外壳外部。优选地: ...
【技术保护点】
1.过流切断装置,其特征在于:包括过滤网(1)、外壳(2)、密封圈(3)、阀芯(4),所述过滤网(1)下端设置有所述外壳(2),所述外壳(2)内部设置有所述密封圈(3),所述阀芯(4)设置在所述密封圈(3)上,所述阀芯(4)和所述密封圈(3)之间设置有弹簧(5),O型圈(6)设置在所述外壳(2)外部。/n
【技术特征摘要】
1.过流切断装置,其特征在于:包括过滤网(1)、外壳(2)、密封圈(3)、阀芯(4),所述过滤网(1)下端设置有所述外壳(2),所述外壳(2)内部设置有所述密封圈(3),所述阀芯(4)设置在所述密封圈(3)上,所述阀芯(4)和所述密封圈(3)之间设置有弹簧(5),O型圈(6)设置在所述外壳(2)外部。
2.根据权利要求1所述的过流切断装置,其特征在于:所述O型圈(6)和所述外壳(2)过盈配合,所述O型圈(6)的材质为丁腈橡胶。
3.根据权利要求...
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。