A top plate fracturing anti-backflow device

CN224432515UActive Publication Date: 2026-06-30YUWU COAL CO LTD OF SHANXI LUAN GRP +1

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: YUWU COAL CO LTD OF SHANXI LUAN GRP
Filing Date: 2025-09-11
Publication Date: 2026-06-30

AI Technical Summary

Technical Problem

The existing anti-backflow device for hydraulic fracturing of the roof lacks a pressure gauge cleaning function, which makes the pressure gauge easy to be contaminated in the fracturing operation environment, causing safety hazards.

Method used

A top plate fracturing anti-backflow device was designed, comprising a protective shell, an electric push rod, and a cleaning plate. The electric push rod drives the cleaning plate to clean the surface of the pressure gauge, and high-pressure cleaning fluid is sprayed out using the water outlet pipe and nozzle, combined with the brush bristles to remove contaminants.

Benefits of technology

Effective cleaning of pressure gauges ensures accurate readings, avoids safety risks caused by misinterpretation of readings, and protects the safety of staff.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a roof fracturing anti-backflow device, relating to the field of coal and rock mining technology. It includes a coal seam roof with a drilled hole at its bottom. An anti-backflow mechanism is installed inside the drilled hole, comprising a first packer with a hollow steel pipe inside. By incorporating a connecting block, a protective shell, an electric push rod, and a cleaning plate, the protective shell can block external contamination such as fracturing fluid splashes and rock debris impacts. When the pressure gauge dial becomes contaminated, the electric push rod is activated. The extension end of the electric push rod drives the cleaning plate to reciprocate in a direction parallel to the pressure gauge dial. During this movement, the bristles gently adhere to the dial surface, efficiently removing dust, water stains, and oil and gas residue, ensuring the pressure gauge remains clear. This allows operators to accurately read key data, avoiding overpressure risks or underpressure problems caused by misreading, and ensuring worker safety.

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