Rotatory vacuum pump

• Main Author: JIEHUI HE
• Format: Patent
• Language: English
• Published: 25.05.2005
• Edition: 7
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

The utility model relates to a reverse vacuum pump, in particularly to a reverse vacuum pump for a smoke exhaust ventilator. The reverse vacuum pump comprises a rack body, a winding, a magnet wrapped in the winding, a valve body fixed in the magnet and a water guide seat which is communicated with water outlet of the valve body. The valve body comprises a housing with a water pumping cavity, a valve rod arranged in the water pumping cavity, a piston, an upper press spring and a lower press spring. The lower press spring is arranged between the bottom of the valve rod and the bottom of the water pumping cavity. The piston is sheathed at the top of the upper press spring and is arranged on the upper part of the housing which is provided with a water pumping hole and a water outlet, and the head of the piston is inserted into the water outlet. A valve is arranged at the water guide seat corresponding to the water outlet of the housing, and a drainage hole communicated with the valve is arranged on the water guide seat. The utility model provides a reverse vacuum pump which is separately provided with a liquid container, and the vacuum pump has the advantages of unlimited mounting position, convenient cleaning, small volume, easy installation and lower noise.