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增压泵自控阀由哪些部分组成?

发布时间:2021-12-02 20:19:40   发布人:
增压泵自控阀分为三个部分:主阀体、膜片控制室及旁通管,以膜片为界,膜片以上为上腔,与排水管道相连通,膜片以下为下腔,与阀门进水口管道相连接,小阀板固定在阀杆上,大阀板在阀杆上上下滑动。当电机启动后,阀门进口处压力逐渐增加,压力水:
The automatic control valve of booster pump is divided into three parts: main valve body, diaphragm control room and bypass pipe. With the diaphragm as the boundary, the upper cavity above the diaphragm is connected with the drainage pipe, and the lower cavity below the diaphragm is connected with the valve inlet pipe. The small valve plate is fixed on the valve rod, and the large valve plate slides up and down on the valve rod. When the motor is started, the pressure at the valve inlet increases gradually, and the pressure water:
1)产生推动大阀板向上的力,此时阀门不能立即打开(因为膜片控制上腔有背压)。
1) When the force pushing the large valve plate upward is generated, the valve cannot be opened immediately (because there is back pressure in the upper chamber of diaphragm control).
2)压力通过旁通管进入膜片控制腔下腔。随着下腔进水量增加,当下腔的压力大于上腔的压力时,下腔压力水推动膜片往上移动,这时小阀板没有对大阀板施加压力。
2) The pressure enters the lower chamber of the diaphragm control chamber through the bypass pipe. With the increase of water inflow into the lower chamber, when the pressure in the lower chamber is greater than that in the upper chamber, the pressure water in the lower chamber pushes the diaphragm upward. At this time, the small valve plate does not exert pressure on the large valve plate.
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3)大阀板有一种力推动其往上移动,在这两个力的作用下,阀门逐渐打开,从而达到启泵时轻载、闭闸、缓开的目的。当突然停电或事故停泵或正常停泵时,阀门进水口处压力水流速降低,大阀板也随之下降,当其流速为零时(即进水口处流速为零时),大阀板由于自身重力而迅速关闭(时间3s~5s),可防止大部分水倒流,此时阀门前后形成一种水压差,压力水一方面通过小阀板底部的三条泄压槽进行泄压。
3) The large valve plate has a force to push it upward. Under the action of these two forces, the valve will gradually open, so as to achieve the purpose of light load, closing and slow opening when starting the pump. In case of sudden power failure, accidental pump shutdown or normal pump shutdown, the pressure water flow velocity at the valve inlet decreases, and the large valve plate also decreases. When the flow velocity is zero (i.e. when the flow velocity at the water inlet is zero), the large valve plate closes rapidly due to its own gravity (for 3S ~ 5S), which can prevent most of the water from flowing back. At this time, a water pressure difference is formed in front of and behind the valve, On the one hand, the pressure water is relieved through three pressure relief grooves at the bottom of the small valve plate.
4)压力水从旁通管进入膜片控制室上腔(此过程为吸压腔,能有效吸收一部分水能量),当上腔压力水大于下腔时,压力水推动膜片往下移动,当下腔压力水全部被挤出来时,小阀板缓缓下降,恢复到待机状态,此过程中缓闭时间可调节(3s~150s),届时阀板已全部关闭,滴水不漏。正因为其停机时具有速闭、线性泄压、吸压腔及缓闭等四种水锤消除功能,故停机时无一点响声产生,效果很好。
4) The pressure water enters the upper chamber of the diaphragm control room from the bypass pipe (this process is a pressure absorption chamber, which can effectively absorb part of the water energy). When the pressure water in the upper chamber is greater than that in the lower chamber, the pressure water pushes the diaphragm down. When all the pressure water in the lower chamber is squeezed out, the small valve plate slowly drops and returns to the standby state. The slow closing time in this process can be adjusted (3S ~ 150s), At that time, all valve plates have been closed without leakage. Because it has four water hammer elimination functions such as quick closing, linear pressure relief, pressure suction chamber and slow closing, there is no sound during shutdown, and the effect is very good.
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