The utility model discloses a three-jaw quick joint automatic opening and closing ball valve used for connecting a sprinkling standpipe and a sprinkler.
本实用新型是用于连接喷灌立管和喷头的一个三爪快速接头的自动开关球阀。
Due to the complication and variety in the hole especially the time that is needed to transmit pressure it is very inconvenient to use choke valve to control standpipe pressure.
但井下情况复杂多变，尤其是压力传递需要时间，给调节节流阀控制立压带来不便。
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