Combined exhaust valve group with filtrating and backwashing functions
A technology for exhaust valves and functions, applied in valve details, valve devices, valve operation/release devices, etc., can solve problems such as blocking the exhaust valve inlet, mixing debris, affecting the normal operation of the exhaust valve, etc. Small flow area and improved impact resistance
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[0019] Such as figure 1 As shown, the compound exhaust valve group with filtering and backwashing function includes the main exhaust valve 1 and the inspection valve 3 connected to the inlet of the main exhaust valve 1. There is a The filter screen 4, the valve body at the inlet end of the maintenance valve 3 is provided with a reverse water inlet 5, the valve body at the outlet end of the maintenance valve 3 is provided with a sundry outlet 6, and the trace exhaust valve 2 and the opening 10 pass through a T-shaped joint 11 connection, one end of the T-shaped joint 11 is connected to the outlet of the reverse water inlet pipe 7, and a ball valve 12 is also provided between the reverse water inlet pipe 7 and the T-shaped joint 11, and the debris outlet 6 discharges the debris through the pipeline .
[0020] Such as figure 2 As shown, the outer diameter of the filter screen 4 is slightly larger than the inner diameter of the inlet flange 8 of the main exhaust valve body, and...
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