Double-injection double-seal pressure-display memory type single hydraulic prop
A single hydraulic prop, double liquid injection technology, used in props/supports, mining equipment, earth-moving drilling and other directions, can solve the problems of easy damage to the sealing surface, leakage, and high sealing failure rate, so as to improve wear resistance and The effect of surface hardness, reduced possibility of damage, and reduced maintenance effort
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[0030] The present invention will be further described below in conjunction with drawings and embodiments.
[0031] Such as figure 1 As shown, the double-injection double-sealed pressure-memory hydraulic prop for mining includes an outer cylinder 44, a middle cylinder 32, and a live column 31. The handle body dustproof ring 8, the handle body guide ring 10 and the handle body one-way sealing ring 33, the handle body sealing anti-extrusion ring 34 are installed on the upper end of the outer cylinder 44.
[0032] The upper end of middle cylinder 32 is equipped with handle 25 through handle seal ring 6 and handle connection steel wire 7, handle dustproof ring 22, handle guide ring 5 and handle one-way seal ring 23, handle seal anti-extrusion ring 24 , the lower end is provided with a middle cylinder piston 41; the middle cylinder piston 41 lower end cooperates with the inner surface of the outer cylinder 44 through the middle cylinder piston guide ring 18, the middle cylinder pi...
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