Sealing structure for pumping oil cylinder rod

Abstract

The invention discloses a sealing structure for a pumping oil cylinder rod. The sealing structure comprises an oil cylinder body, a piston rod and a rod end chamber. One end of the oil cylinder body is connected with a guide sleeve, and the piston rod is sleeved with the guide sleeve. In the direction from one end, close to the rod end chamber, of the guide sleeve to the other end of the guide sleeve, a Sitefeng seal, a U-shaped sealing ring, a BA sealing ring and a dustproof ring are arranged between the guide sleeve and the piston rod in sequence, a first guide ring is arranged between the Sitefeng seal and the U-shaped sealing ring, a second guide ring is arranged between the U-shaped sealing ring and the BA sealing ring, a ring tank is arranged between the U-shaped sealing ring and the second guide ring, the ring tank is connected with a one-way valve, the ring tank is communicated with an inlet of the one-way valve, and an outlet of the one-way valve is communicated with the rod end chamber. According to the sealing structure for the pumping oil cylinder rod, trapped oil between sealing elements can be conveniently discharged in time, and the situation that trapped oil pressure is excessively high and consequently the sealing effect is affected is avoided.

Description

technical field [0001] The invention relates to a sealing structure, in particular to a pumping oil cylinder rod sealing structure, in particular to a main oil cylinder piston rod sealing structure of a concrete delivery pump. Background technique [0002] Concrete pumps, as building construction equipment capable of high-efficiency, long-distance, and continuous delivery of pumpable concrete, have become the main force in today's international engineering construction industry, and take on important construction tasks in the process of urbanization and modernization of the global society. In the concrete pump structure, the reliability of the main pumping cylinder, which is one of the executive components that converts the energy of the equipment into construction efficiency, directly affects the economy and work efficiency of the equipment. It is a linear reciprocating motion, and the working pressure is high, the speed is fast, and the leakage is required to be small. The...

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Problems solved by technology

[0004] In the sealing structure of the cylinder rod, trapped oil is easily formed between the two seals. In the prior art, the trapped oil is directly taken out of the cylinder with the piston rod, which easily causes the solution pollution in the washing room at one end of the piston rod, and the trapped oil cannot Smooth discharge, the trapped oil between the seals will easily damage the sealing effect of the seals as the pressure rises, thereby affecting the normal operation of the concrete pump

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