A vacuum suction-assisted pumping system
By setting an exhaust port on the top of the centrifugal pump casing and connecting it to a vacuum pump and a water tank, the problems of time-consuming and labor-intensive start-up and cavitation of centrifugal pumps are solved, achieving rapid response and efficient water pumping, reducing equipment costs and extending service life.
CN224453107UActive Publication Date: 2026-07-03CHINA RAILWAY NO 2 ENG GROUP CO LTD +1
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY NO 2 ENG GROUP CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-03
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Figure CN224453107U_ABST
Abstract
This utility model relates to the field of tunnel construction technology, specifically to a vacuum-assisted water pumping system. It includes a centrifugal pump with a pump casing containing an impeller rotatably connected inside. The pump casing has an exhaust port on its top. The system also includes a water tank with an inlet; a vacuum pump with its inlet pipe connected to the exhaust port of the pump casing and its outlet pipe connected to the inlet of the water tank. The vacuum pump, water tank, and centrifugal pump are interconnected. This utility model overcomes the technical problems of existing centrifugal pumps requiring manual water injection before startup, which is time-consuming, labor-intensive, and slow to respond quickly. Furthermore, it easily leaves air bubbles inside the pump casing, leading to low pumping efficiency and cavitation.
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