流量控制阀;EXCESS FLOW CHECK VALVE

摘要

提供一种流量控制阀具有能够对气体流路内之阀座口往闭塞方向移动的球阀(10)，与支持球阀(10)的保持构件，及将球阀(10)往前述保持构件侧赋能的张力弹簧(17)；不仅能够容易且牢固地装设于气体流路内，而且能够作固定位置之微调整或卸下。;为达成上述功效，流量控制阀之保持构系由：具有将气体流路之内周面往半径方向弹性地押压的复数个押压部(131)(133)(134)之固定体(13)，及从相当于气体流路中心的固定体(13)之预定处朝下游侧突设，且以前端顶持球阀(10)让其能往背离方向移动的保持片(12)所构成；球阀(10)与保持片(12)分别形成有扣止张力弹簧(17)之两端的第1、第2扣止部(16)(14)；张力弹簧(17)的自然长度设定为，比球阀(10)由保持片(12)保持之通常状态时的第1、第2扣止部(16)(14)间的距离来得短。;[代表图]图1 The object of this invention is to provide a prevent excessive outflow valve which can be mounted easily and firmly in gas flow duct, and can be removed and adjusted finely on its fixing position; which includes ball valve (10) enable moving to the direction for blockingthe valve seat mouth in gas flow duct, and holding member for supporting ball valve (10), and tension spring (17) to force the ball valve (10) with the tendency forwards the holding member. ;The solution is to have a holding member comprising a fixed body (13) having plural press part (131)(133)(134) to press elastically in the radial direction to the gas flow duct, and a holding plate (12) protrudes toward the downstream at the predetermined position of the fixed body (13) which equivalent to the center of the gas flow duct and the ball valve (10) can move away from its tip; each of ball valve (10) and holding plate (12) forming first and second stopping part (16)(14) to engage the two ends of tension spring (17); the nature length of the tension spring (17) is set smaller than the distance between first and second stopping part (16)(14) when the ball valve (10) and holding plate (12) at their ordinary holding state.