Pre-pump bottom valve, system and method for pumping liquids

By designing a foot valve before the liquid pump and using a combination of valve cover, valve body, pressure plate and check valve, the inconvenience of installing the centrifugal pump at the liquid level and the water hammer problem were solved, achieving efficient liquid delivery and safe installation.

CN116972020BActive Publication Date: 2026-06-02张磊
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
张磊
Filing Date
2023-08-01
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies for taking liquid from above the liquid surface of a centrifugal pump have problems such as inconvenient installation, easy damage to seals, high flow resistance, and difficult maintenance. In particular, water hammer is prone to occur in high-head locations, affecting pipeline safety and efficiency.

Method used

Design a bottom valve for a liquid pump, including a valve cover, valve body, pressure plate and check valve. The opening and closing of the shut-off port is controlled by a drive mechanism. Combined with the check valve and flow limiting rod, it realizes the effective delivery of liquid, allows the pump to be installed above the liquid surface and reduces flow resistance, eliminating water hammer phenomenon.

Benefits of technology

This technology enables efficient installation of the pump above the liquid surface and facilitates liquid delivery, reducing flow resistance, extending maintenance cycles, improving installation convenience and safety, eliminating water hammer, and saving energy.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN116972020B_ABST
    Figure CN116972020B_ABST
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Abstract

The application discloses a liquid-on-pump front bottom valve, a system and a method for pumping liquid. The liquid-on-pump front bottom valve comprises a valve cover, a valve body with a valve cavity, and a pressing plate arranged in the valve cavity. The valve body is provided with a bottom valve inlet and a bottom valve outlet, and a cut-off port is arranged between the bottom valve inlet and the bottom valve outlet. The pressing plate is driven by a driving mechanism to close or open the cut-off port. The valve cavity is provided with a top inner space in the position of the valve cover. A valve II is arranged at the top inner space or a first pipeline connected to the bottom valve outlet. A first check valve is arranged on the pressing plate, and the bottom valve inlet is connected to the top inner space through the first check valve. A valve I is arranged at the position of the bottom valve outlet or a first pipeline connected to the bottom valve outlet. The application solves the problem of the limitation of the prior art on the position of the centrifugal pump above the liquid surface.
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