Axial corrugated expansion joint with reinforced connection structure

Abstract

The invention discloses an axial corrugated expansion joint with a reinforced connection structure. The axial corrugated expansion joint with the reinforced connection structure comprises connecting pipes, a left liner pipe, a corrugated pipe, a guide cylinder and a right liner pipe, wherein the two ends of the corrugated pipe are connected with the left liner pipe and the right liner pipe respectively in a sealing mode; the left liner pipe connected to one end of the corrugated pipe in the sealing mode and the right liner pipe connected to the other end of the corrugated pipe in the sealing mode are sleeved with the connecting pipes with flange ends outward, stepped holes are formed in inward openings of the connecting pipes and are in clearance fit with the outer wall of a straight section of the corrugated pipe, the free end of the left liner pipe is connected with the inner wall of the cooperative connecting pipe in a sealing mode, the free end of the right liner pipe is connected with the inner wall of the cooperative connecting pipe in a sealing mode, and the reinforced connection structure which surrounds the straight edge of the corrugated pipe and is not bent along weld joints is directly formed; the guide cylinder is arranged in an inner cavity of the left liner pipe and an inner cavity of the corrugated pipe in a lining mode, so that a protective and guiding structure for the corrugated pipe is formed. According to the technical measures, the purpose that the weld joints at the straight end of the corrugated pipe are reinforced is achieved, and compensation motions can be kept flexible.

Description

technical field [0001] The invention relates to a pipeline safety device, in particular, the invention relates to an axial bellows compensator provided with a reinforced connection structure. Background technique [0002] Axial bellows compensator belongs to a kind of commonly used pipeline compensator, which is composed of connecting pipes and flanges that are sealed and connected at both ends of bellows. This type of compensator has a very simple structure, is easy to manufacture, and is cheap in price. Products in the prior art are usually matched in low-pressure heating network pipelines, which can realize the expectation of compensating or absorbing axial thrust and displacement. Although the axial corrugated compensator in the prior art has been widely used in low-pressure heating network pipelines, the compensator with this structure has poor pressure bearing capacity, especially the weld between the corrugated pipe and the connecting pipe is vulnerable, and its mani...

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Problems solved by technology

[0003] The present invention mainly aims at the problem that the weld seam between the straight edge of the bellows and the connecting pipe is vulnerable in the prior art products, and proposes an axial bellows compensator with a reinforced connection structure, which has a simple connection structure, reasonable force, and Strong deformation ability

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