No-clean oxygen collecting device

The utility model discloses a no-clean oxygen collecting device which solves the problems that gas is easy to dissipate, water resources are wasted, the operation is tedious, potential safety hazards exist and the like when oxygen is collected by a traditional drainage method. The device mainly comprises two empty plastic bottles, a glass conduit, a sharp-nose glass conduit, a water stop clamp, a latex tube, a T-shaped tube, a tripod and the like. The device is characterized in that a closed-loop communication system is formed in a specific assembly mode, so that oxygen generated by an oxygen generating device is collected into the device by changing pressure difference on the basis of the property that oxygen is insoluble in water, and escape of gas and waste of water resources are avoided. Meanwhile, the device simplifies the operation process, reduces the safety risk in the operation, does not need to clean the gas collection bottle and the table top after the experiment, and improves the experiment effici