A screen pipe propeller for use in a coal mine underground

The screen pipe pusher, which uses radial clamping of eccentric shaft rollers and closed-loop transmission of bevel gears, solves the problem of pushing screen pipes to the bottom of the hole in coal mines, achieving efficient and low-manpower screen pipe lowering, and improving borehole utilization and safety.

CN224314968UActive Publication Date: 2026-06-02SHAANXI COALFIELD GEOLOGY GRP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHAANXI COALFIELD GEOLOGY GRP CO LTD
Filing Date
2025-08-18
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In underground gas extraction in coal mines, existing technologies are insufficient to effectively push the screen pipe to the bottom of the hole, resulting in low borehole utilization and high construction costs. Manual pushing is inefficient and requires a large amount of manpower.

Method used

The mechanical adaptive pushing system adopts radial clamping of the eccentric shaft roller group, closed-loop transmission of bevel gear/cylindrical gear and segmented thrust coordination. The roller group grips the outer wall of the screen tube and uses friction to push the screen tube into the borehole. Combined with the guide tube and adjustable support legs, it can adapt to different drilling conditions.

Benefits of technology

It enables efficient and precise deep-hole lowering of screen tubes by a single operator, reducing labor intensity and construction costs, and improving drilling utilization and safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a screen pipe propelling device for underground coal mine, include: support, be equipped with the first datum axle along the axial extension, clamping power unit is by at least two gyro wheel periphery distribution, each gyro wheel is through second datum axle and support swing joint, and second datum axle is perpendicular with first datum axle and is set up in the different surface, forms the radial clamping space of screen pipe, drive arrangement, drive gyro wheel synchronous rotation to promote screen pipe and feed along the direction of first datum axle.
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