Novel steel-plastic transition joint

Abstract

The invention discloses a novel steel-plastic transition joint. The novel steel-plastic transition joint comprises an inner pipe and an outer protective pipe. The inner pipe comprises a steel connecting pipe arranged over the ground and connected with a steel pipe and a 90-degree oblique plastic pipe arranged under the ground and connected with a plastic pipe, wherein one end of the 90-degree oblique plastic pipe stretches over the ground and is fixedly connected with a connecting part; the outer side of the inner pipe is sleeved with the protective pipe, and the inner pipe is detachably fixedin the outer protective pipe through a fastener. By adoption of the novel steel-plastic transition joint, the probability of gas leakage caused by deformation of the steel-plastic transition joint can be effectively lowered or avoided, and the safety of the steel-plastic transition joint is improved; and through the design of the outer protective pipe, the service life of the steel-plastic transition joint is effectively prolonged.

Description

technical field [0001] The invention relates to pipeline accessories, in particular to a novel steel-plastic conversion joint. Background technique [0002] Existing gas pipes made of polyethylene raw materials have been widely used in China, and steel-plastic transition joints connecting polyethylene pipelines and steel parts are indispensable. In engineering construction, the problem of connecting plastic pipes and steel pipes is often encountered. At present, the method of steel-plastic transition connection is a relatively common way. Most of the existing steel-plastic transition pipes use 90° steel bends, and part of the 90° steel bends is buried in the soil. Although anti-corrosion treatment has been done on the 90° steel bends, after ten years of use After about a year, the 90° steel elbow will still be corroded; the corroded part of the 90° steel elbow will leak gas, posing a safety hazard. [0003] Later, in order to solve the above problems, the manufacturer dev...

AI Technical Summary

Problems solved by technology

Most of the existing steel-plastic transition pipes use 90° steel bends, and part of the 90° steel bends is buried in the soil. Although anti-corrosion treatment has been done on the 90° steel bends, after ten years of use After a year or so, the 90° steel elbow will still be corroded; the corroded part of the 90° steel elbow will leak gas, posing a safety hazard

[0003] Later, in order to solve the above problems, the manufacturer developed a 90° plastic elbow to extend the 90° plastic elbow out of the ground to connect with the steel pipe joint; this pipe can effectively solve the problem of anti-corrosion inspection; but after many years of use, it was found that the 90° The bearing point of the plastic elbow will be deformed; the deformation of the 90° plastic elbow will still cause gas leakage in the later stage

Moreover, the damage of the steel-plastic conversion joint reduces the service life of the steel-plastic conversion joint

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