Building roof injection combined water-stopping device

CN224282090UActive Publication Date: 2026-05-26XUZHOU MEDICAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XUZHOU MEDICAL UNIVERSITY
Filing Date
2025-07-09
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing technologies for dealing with water seepage problems in the roofs of old buildings are limited by the high cost of waterproof membranes and their application to large areas, while grouting reinforcement cannot completely solve the problem of water retention inside the structure, which can easily lead to the transfer of seepage areas and cause secondary hazards.

Method used

A combined water-stopping device for building roofs is adopted, which combines active vacuum pumping and passive grouting reinforcement. By using a combination of pumping sleeves and grouting pipes, negative pressure is used to absorb pore water and fill cracks in the roof structure, forming an effective water-stopping and reinforcement measure.

Benefits of technology

It is safe, environmentally friendly, economical, and efficient in solving the problem of water seepage on the roofs of old buildings, preventing the spread of seepage, and is especially suitable for localized water seepage treatment.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224282090U_ABST
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Abstract

This utility model discloses a combined vacuum drainage and water-stopping device for building roofs, comprising a drainage sleeve, a grouting pipe, and a drainage tray. The drainage sleeve includes a grouting sleeve and a water-pushing sleeve, with a grout outlet hole on the grouting sleeve and a perforated pipe structure for the water-pushing sleeve. The grouting pipe includes a grout outlet pipe, a grout delivery pipe, and a grout inlet pipe. The grout outlet pipe has a tapered structure that is wider at the front and narrower at the back, with its front end sealed to the inner wall of the water-pushing sleeve. A grouting channel is formed inside the grout delivery pipe, and a water-pushing channel is formed between the grout delivery pipe and the water-pushing sleeve. The drainage tray includes a disc body located at the rear end of the drainage sleeve, with grouting holes and water-pushing holes on the disc body. The grouting holes are positioned corresponding to the grouting channels and are sealed to the grout inlet pipe via connecting pipes. The water-pushing holes are positioned corresponding to the water-pushing channels. This utility model combines active vacuum water-pushing for leak-stopping with passive grouting reinforcement for waterproofing, fundamentally solving the problem of water retention on roofs, and is particularly suitable for treating water seepage problems on the roofs of old buildings.
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