Negative -pressure suction device

The utility model discloses a negative -pressure suction device, including selection position valve and negative pressure suction controlling means, including inserting pipe, discharge pipe on the valve of selection position to and the base of connection access pipe and output tube. Be equipped with the recess on the base. Be equipped with on the negative pressure suction controlling means with recess matched with is protruding, be equipped with the bolt hole in recess and the arch. Inserting the pipe and still being equipped with the draw -in groove, convenient and external device realizes quick joint. Selection position valve and negative pressure suction controlling means fixed connection in an organic whole have the advantage that reduces occuping of space, convenient installation. 本实用新型揭示了种负压抽吸装置，包括选位阀和负压抽吸控制装置，所述选位阀上包括接入管、排出管，以及连接接入管和输出管的基座。所述基座上设有凹槽。所述负压抽吸控制装置上设有与所述凹槽相配合的凸起，所述凹槽与凸起上设有螺栓孔。所述接入管还设有卡槽，方便与外接设备实现快速卡接。选位阀和负压抽吸控制装置固定连接于体，具有减少空间的占用，便捷安装的优点。