A thin-walled C-shaped steel keel backfilling device for troughs

By designing a thin-walled C-shaped steel keel backfilling device for grout trenches, and using a lifting winch and a rotating winch to control the steel rope, combined with structures such as slide bars and striking blocks, the problem of existing devices being unable to fill the deep corner areas of grout trenches has been solved. This has resulted in more uniform backfilling and more efficient defoaming of concrete, reducing the damage of solidified concrete to the waterproof membrane.

CN117513468BActive Publication Date: 2026-06-30CHINA FIRST HIGHWAY ENGINEERING CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA FIRST HIGHWAY ENGINEERING CO LTD
Filing Date
2023-11-03
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing backfilling devices are unable to effectively fill the corner areas deep within the trench, resulting in missing concrete and poor backfilling effect.

Method used

A thin-walled C-shaped steel keel backfilling device was designed, including components such as a hopper, top cylinder, sleeve, defoaming cylinder, discharge cylinder, and guide wheel. The tightening and loosening of the lifting and rotating steel ropes are controlled by lifting winches and rotating winches. Combined with structures such as slide bars and impact blocks, the device can fill and defoam areas lacking concrete, thereby improving the uniformity of backfilling.

Benefits of technology

It effectively reduces voids caused by missing concrete, improves the uniformity of backfilling, reduces the impact on backfilling effect, and reduces damage to waterproof membrane caused by hardening concrete.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of building construction, specifically a thin-walled C-shaped steel keel backfilling device, including a hopper; a top cylinder is provided at the bottom of the hopper; multiple sleeves are slidably connected to the bottom of the top cylinder; a first spring is fixedly connected between the top cylinder and the sleeves; multiple second springs are fixedly connected between the multiple sleeves; a defoaming cylinder is fixedly connected to the bottom of the bottommost sleeve; a discharge cylinder is fixedly connected to the bottom of the defoaming cylinder; a connecting ring is rotatably connected to the bottom of the discharge cylinder, and the lifting and rotating steel cables are tightened and loosened by a lifting winch and a rotating winch, thereby enabling the discharge hopper to rotate and lift. This facilitates the filling of areas lacking concrete, thereby reducing voids caused by missing concrete, improving the uniformity of backfilling, and reducing the impact on the backfilling effect.
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