Mine single hydraulic prop

Abstract

The invention discloses a single hydraulic prop for mines. The single hydraulic prop for mines include an oil cylinder, movable rods, sleeves, a top cover, a base, a three-use valve and handles, wherein movable rods are sleeved in the sleeves, the base is arranged at the one end of the oil cylinder and handles are arranged on the other end of the oil cylinder, the movable rods are provided with installation portions. Connection portions which match with installation portions in an embedded mode are arranged on sleeves. Sleeves are sleeved outside the movable rods of the single hydraulic prop for mines by connection portions so that the movable rods are protected effectively, damages to the single hydraulic prop due to firecracker are avoided, sleeves have corrosion resistance, the service life of the single hydraulic prop can be extended greatly and environmental pollution is avoided during manufacturing.

Description

technical field [0001] The invention relates to a hydraulic prop, in particular to a single hydraulic prop for mining. Background technique [0002] The existing plunger suspension mining single hydraulic prop adopts plunger technology, the high-pressure sealing surface is set on the outer surface structure of the live post, and the live post is exposed to the air, and the existing single hydraulic prop is chrome-plated on the outer surface of the live post Or chemical plating, this method can increase the hardness of the outer surface of the live column to a certain extent, and improve the performance of the live column, but the coating is easy to fall off, and the live column is afraid of being broken and will cause pollution during manufacture. Another type of live column is composite steel pipe, and the layer-base interface between the live column and the stainless steel sleeve is bonded with polyurethane adhesive, which has low bonding strength and low outer surface har...

AI Technical Summary

Problems solved by technology

[0002]The existing plunger-suspension mining single hydraulic prop adopts plunger-type technology, and the high-pressure sealing surface is set on the outer surface structure of the live post, and the live post is exposed to the air. The existing single hydraulic prop is chrome-plated or chemically plated on the outer surface of the live post. This method can increase the hardness of the outer surface of the live post to a certain extent and improve the performance of the live post. However, the coating is easy to fall off, and the live post is afraid of being shot. collapsing and polluting when manufactured

Another type of live column is composite steel pipe, and the layer-base interface between the live column and the stainless steel sleeve is bonded with polyurethane adhesive, which has low bonding strength and low outer surface hardness (183HB)

The live column is made of composite steel pipes to form multiple layers, layer-base interface, low joint strength, easy to peel off, low surface hardness, fear of being shot, the light one will cause the live column to return slowly, and the severe one will not return to the column, and the support will leak. Will soon enter the overhaul period

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