4results about How to "Avoid backflow phenomenon" patented technology

The automatic fire extinguishing equipment comprises a protective shell, a lithium battery body is connected to the interior of the protective shell, a heat dissipation sealing mechanism is arranged on the outer side of the protective shell, and a partition fire extinguishing mechanism is arranged on the inner side of the protective shell; the heat dissipation sealing mechanism is arranged on the outer side of the protective shell, and the connecting piece, the multiple sealing blades, the first supporting arm, the second supporting arm, the extending plate, the transmission piece and the adjusting rod are arranged in a series linkage mode, so that the first motor can synchronously adjust the opening or closing state of the multiple sealing blades when being controlled and driven; in the normal working process of the lithium battery body, efficient heat dissipation is achieved in cooperation with the ventilation pipe and the heat dissipation fan, the ventilation channel can be rapidly closed when temperature rises abnormally, external air is prevented from entering the protection shell, and the combustion condition is weakened from the environment level.

The utility model relates to the technical field of shield pumps, and discloses a shield pump with pressurizing and self-sucking functions, which comprises a shield pump body, liquid inlet pipes are communicated with both sides of the shield pump body, and a first mounting pipe and a second mounting pipe are fixedly connected to the inner wall of the shield pump body respectively. A first motor and a second motor are fixedly embedded in the first mounting pipe and the second mounting pipe respectively, an output shaft of the first motor penetrates through the first mounting pipe and is fixedly sleeved with a connecting rod, and an output shaft of the second motor penetrates through the second mounting pipe. The shield pump is easy to use, air in a pipeline can be pumped out through the liquid inlet pipes on the two sides for self-suction by starting the first motor and the second motor, the two sets of sealing plugs are arranged in the shield pump body, automatic sealing is achieved through the tension of the tension spring, the backflow phenomenon can be effectively prevented, the rotating connecting rods on the two sides can increase pressure for liquid, and the sealing effect is good. And finally, the liquid can be quickly discharged into a container for storage through a small-pipe-diameter liquid outlet pipe.

This invention belongs to the technical field of natural gas refueling equipment and discloses a mobile natural gas refueling device, including a fixed frame and a mobile natural gas pipeline. A cover plate located outside the mobile natural gas pipeline is bolted to one side of the fixed frame. Six connecting modules are arranged in a ring at equal angles inside the outer wall of the fixed frame. A movable module connected to the fixed frame is fixedly connected to the outside of the connecting modules. An active module fixedly connected to the fixed frame is connected to the outer end of the movable module. This invention achieves the purpose of quickly and stably sealing the pipeline connection area by setting up rotating modules and connecting modules in cooperation. Its lower end will abut against the abutment block, and the abutment block will move away from the connecting module, causing the second gear to rotate. The second gear causes the sealing plate to move in the opposite direction to the abutment block and gradually move towards the middle area of ​​the two mobile natural gas pipelines until it is completely sealed.