When the float valve is in operation, the gas-liquid balance pipe on the valve body communicates with the gas-liquid balance pipe joint on the container cylinder. When the liquid level in the container is below the normal working liquid level, the liquid level corresponding to the float ball is also low. The float ball falls by the action of the lever to cause the valve core to leave the valve seat, the valve hole is opened, and the sorghum refrigerant liquid passes through. After the filter enters the float valve to throttle, it becomes a low-pressure cryogenic liquid that flows through the inlet pipe to the vessel. When the liquid level in the container gradually rises, the float floats, and the lever drives the valve core to close the valve hole to stop the liquid supply.
Commonly used float valves have two forms of opening and closing motion characteristics of the spool. The utility model relates to a slide valve type float ball valve which has a floating movement of a floating ball and a reciprocating movement of the valve core, and the valve core has a needle shape and a cylindrical shape, and the needle valve core is suitable for a device with a small capacity; For larger capacity devices. The other is a plug type float valve.
The plug type float ball valve has a sleeve with a slotted hole and a cylindrical valve core made of 35 gauge steel or stainless steel, and the sleeve is tightly sleeved on the valve seat, and the lower end of the spool is equipped with a ball bearing and a transmission mechanism of the float ball. With the fluctuation of the liquid surface, the connecting rod mechanism on the floating ball pushes the valve core to rotate in the sleeve, and changes the mutual meshing area of ​​the sleeve slot and the spool slot, so that the cross-sectional area of ​​the throttle passage changes accordingly. Ball bearings reduce wear on the spool and sleeve. Control is also more accurate.
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