Novel mechanical compressible single prop with adjustable constant resistance

Abstract

The invention discloses a novel mechanical compressible single prop with adjustable constant resistance. The novel mechanical compressible single prop comprises a prop rod, a prop cylinder, a prop base, a prop cap and a steel ball ring. The prop cylinder is a hollow cylinder; a cylinder conical face is arranged at the top end of the inner wall of the prop cylinder; the steel ball ring is arranged at the bottom end of the prop rod in a sleeving mode; the bottom end of the prop rod provided with the steel ball ring extends into the prop cylinder so as to enable the steel ball ring to be located between the cylinder conical face and the prop rod; a rigid blocking sleeve preventing steel balls from overflowing from the prop cylinder is arranged outside the cylinder conical face; the prop cap is arranged at the top end of the prop rod; and the bottom end of the prop cylinder is arranged in a groove of the prop base. The novel mechanical compressible single prop with the adjustable constant resistance has the characteristics of quick installation, large supporting strength, economical materials, good stability, high reliability and the like, and has high on-site practicality in coal mine down-hole roof supporting.

Description

technical field [0001] The invention relates to the technical field of underground operation support, in particular to a novel mechanical adjustable constant resistance compressible single support. Background technique [0002] The occurrence conditions of my country's coal resources are complex and changeable, and the problem of roof support after coal seam mining has always plagued the entire coal industry. Among many coal mine underground support equipment, the single prop is widely used in coal mine roof support due to its characteristics of less investment, less restriction by geological conditions, flexible operation and convenient use. It has developed from the initial metal friction prop to the current single prop Body hydraulic props, the support performance has been greatly improved. [0003] However, the existing single hydraulic props have disadvantages such as relatively complex structure and heavy maintenance and repair workload. Metal friction props are also ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing single hydraulic props have disadvantages such as relatively complex structure and heavy maintenance workload, and metal friction props are also prone to damage and failure underground due to shortcomings such as insufficient support strength and inability to maintain constant resistance.

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