Sealing tensile cylinder

Abstract

The invention discloses a sealing tensile cylinder which comprises a sealing cylinder and a tensile cylinder, wherein the sealing cylinder comprises a shared end cover, a front end cover, a sealing cylinder barrel for connecting the shared end cover and the front end cover and a sealing piston rod which is embedded into the shared end cover and penetrates through the front end cover; a sealing piston which is sleeved on the sealing piston rod is also arranged in the cylinder barrel; and the sealing piston rod is a hollow concentric double-shaft piston rod, and the shaft head end of the concentric double-shaft piston rod is provided with a dual seal ring. The sealing piston rod is changed from a single shaft to double shafts, the guide sleeve length of the piston rod is increased, the action of the piston rod is more stable, and the radial jump of the piston rod is reduced. The gas consumption of the sealing cylinder is reduced, and the action speed of the cylinder is higher. The shafthead end of the double-shaft piston rod of the sealing cylinder is provided with the dual seal ring which can replace a sealing head of the common sealing tensile cylinder, i.e. the sealing head is not installed, thereby the cost of products is reduced.

Description

technical field [0001] The invention belongs to the field of pneumatic technology, in particular to a sealing and stretching cylinder applied to a bottle blowing machine. Background technique [0002] The sealing stretching cylinder is composed of the sealing cylinder and the stretching cylinder sharing one end cover in series. The sealing stretching cylinder of prior art is as figure 1 As shown, the stretching cylinder includes a common end cap, a rear end cap, a stretching cylinder barrel connecting the common end cap and the rear end cap, and a stretching biaxial piston that passes through the piston rod of the sealed cylinder and is sleeved with the stretching piston. pole. The sealing cylinder includes a common end cover, a front end cover, a sealing cylinder barrel connecting the common end cover and the front end cover, a sealing piston rod embedded in the common end cover and passing through the front end cover, and a sealing piston rod sleeved in the cylinder barr...

AI Technical Summary

Problems solved by technology

When the cylinder moves at high frequency and high speed, the uniaxial piston rod of the sealed cylinder will move with the high-pressure air pipe, and the high-pressure air pipe joint is easy to loosen and fall off

At the same time, when the uniaxial piston rod of the sealing cylinder extends out of the seal, the high-pressure air pipe enters the air, which will generate a reverse thrust, which will affect the sealing performance of the seal.

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