A portable drainage device for foundation pits in hydraulic engineering

By designing a movable foundation pit drainage device, a combination of a water pump and a three-way valve is used to switch the direction of water flow, which solves the problem of equipment blockage caused by mud and sand at the bottom of the foundation pit, realizes the self-cleaning function of the pump head, and improves the reliability of the drainage equipment.

CN224514189UActive Publication Date: 2026-07-17ZHEJIANG SHUNHE CONSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG SHUNHE CONSTR CO LTD
Filing Date
2025-08-21
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing technologies, silt and sand at the bottom of the foundation pit can easily enter the drainage equipment, causing blockages. Furthermore, existing devices cannot effectively clean silt and sand from the outside of the filter cylinder and from areas near the outside.

Method used

A mobile foundation pit drainage device was designed, comprising a mobile carrier, a power supply module, a pumping assembly, and a reversing assembly. By using a combination of a water pump and a three-way valve, the direction of water flow can be switched. It can clean the inside of the pump head and remove mud and sand from the outside of the filter screen by backflow while pumping and draining water.

Benefits of technology

It achieves a simple and efficient cleaning process, with only one water pump for normal water pumping and drainage, and can perform internal cleaning of the pump head when needed to avoid equipment blockage.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224514189U_ABST
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Abstract

This utility model discloses a mobile foundation pit drainage device for hydraulic engineering, including: a mobile carrier, a power supply module, a pumping assembly, and a reversing assembly. The pumping assembly includes a pumping head, a pumping pipe, a water pump, and a drain pipe connected in sequence. The water pump is mounted on the mobile carrier and electrically connected to the power supply module. The reversing assembly includes a first connecting pipe and a second connecting pipe. The pumping pipe is equipped with a first three-way valve near the water pump and a second three-way valve away from the water pump. The drain pipe is equipped with a third three-way valve near the water pump and a fourth three-way valve away from the water pump. The first three-way valve is also connected to the fourth three-way valve through the first connecting pipe, and the second three-way valve is also connected to the third three-way valve through the second connecting pipe. With only one water pump, it can not only pump and drain water normally, but also, when needed, pull the pumping head out of the foundation pit and put the end of the drain pipe into clean water to allow the water to flow back and flush the inside of the pumping head.
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