Integral seal jack

Abstract

The invention provides an integral seal jack. The jack consists of a cylinder body, a piston rod, a piston component and a cylinder port component, wherein the cylinder body consists of a base and a cylinder tube, and the base and the cylinder tube are welded together; the piston rod is a step bar one end of which is provided with a shoulder, and is sleeved in the cylinder tube; and the piston component is sleeved on the piston rod, is positioned by the shoulder of the piston rod, and is fixed on the piston rod through a nut. The integral seal jack is characterized in that the piston component consists of a piston, two piston guide parts and a piston seal component, and is an integral piston; the two piston guide parts are positioned on the front end and the rear end of the piston respectively; the piston seal component is positioned between the two piston guide parts; the piston seal component and the two piston guide parts are integrally cast on the piston; a stainless steel sleeve is welded on the inner wall of the cylinder tube; and a laser cladding layer is arranged on the outer surface of the piston rod. The integral seal jack has the advantages of simple structure, low cost, safety, reliability, good seal performance and low repair rate, and can remarkably improve the corrosion resistance effect of the jack.

Description

technical field [0001] The invention relates to a jack, in particular to an integrally sealed jack, which is applied to the hydraulic support for internal liquid mines, and is used as a supporting part of hydraulic fully mechanized mining supports of various frame types and light-duty top-coal caving supports to complete the supports. and the actions of its parts. Background technique [0002] At present, the jacks used in mining hydraulic supports have the following disadvantages in terms of structure, sealing and anti-corrosion: [0003] 1. In terms of structure: the piston assembly of the existing jack is composed of a piston, a support ring, a snap ring and a seal, which not only wastes raw materials but also wastes processing time and assembly time. [0004] 2. In terms of sealing: the seal of the existing jack is sealed by a traditional sealing ring. Due to the unstable quality of the domestic sealing ring, it is easy to fall off during use, the leakage is serious, an...

AI Technical Summary

Problems solved by technology

[0003] 1. In terms of structure: the piston assembly of the existing jack is composed of a piston, a support ring, a snap ring and a seal, which not only wastes raw materials but also costs processing time and assembly time

[0004] 2. In terms of sealing: the seal of the existing jack is sealed by a traditional sealing ring. Due to the unstable quality of the domestic sealing ring, it is easy to fall off during use, the leakage is serious, and the repair rate is high; Dimensional and geometric tolerance requirements are very high, and processing accuracy requirements are high

There are three shortcomings in the use of electroplating anti-corrosion measures. First, most electroplating equipment has serious environmental pollution and great social harm; second, because this process is a special process, it has high requirements for the thickness and porosity of the coating; It is easy to fall off, causing the performance of the jack to fail, and the anti-corrosion effect is not as good as the stainless steel sleeve and laser cladding layer

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