Pipeline fastening clamping ring and machining technology

Abstract

The invention relates to the building pipeline connection technology, in particular to a pipeline fastening clamping ring. The clamping ring is of a cylindrical ring structure. The diameter of the inner wall of the clamping ring is in clearance fit with the outer diameter of a matched pipe, the clamping ring is made from crosslinked polyethylene materials with strong shrinkage performance, no chamfering structure is arranged at the front end of the inner wall of the clamping ring, and the inner wall of the clamping ring is provided with knurling teeth. The invention further discloses a knurling tooth machining technology. The structure of a traditional metal clamping ring is changed, the crosslinked polyethylene materials which are elastic, resistant to high temperature and capable of changing along with the environment temperature are adopted, holding force is kept, and the problem that a gap exists between the pipe and a pipe fitting main body and the problem that the clamping ring is rotated or loosened are solved. Meanwhile, plastic materials low in mass and low in price are adopted, the cost is low, market competitiveness is formed, and feasibility is high.

Description

technical field [0001] The invention relates to the connection technology of building pipelines, in particular to a technology of sliding tight pipe fittings. Background technique [0002] Piping technology continues to evolve with the advancement of new piping materials. In the construction pipeline market, especially heating pipelines, the demand for high-temperature and pressure-resistant pipelines such as PE-X, PE-RT, and PAP has continued to increase in recent years. above. The sliding tight pipe fitting is shown in the announcement number CN 205101722U. The pipe fitting has specific structural dimensions described in ASTM F2080-02 "Standard Specification for Cold Expansion Fittings with Metal Compression Sleeves for Cross-Linked Polyethylene (PEX) Pipes". The sliding tight pipe fitting is composed of a joint body and a sealing ring. There is no rubber seal in the pipe fitting, and the whole is made of brass. There is no possibility of aging. It can be installed in th...

AI Technical Summary

Problems solved by technology

But it can't solve the problem of sliding clamp ring rotation and pre-cooling compression compensation

[0004] In addition, the clamp rings of this type of sliding tight pipe fittings are used in a large market. The clamp rings are all made of brass materials, which are easy to cut and easy to produce. However, the price of brass materials is high per ton, and the cost of the clamp rings accounts for a large proportion of the pipe fittings, which restricts the product. Cost reduction and further market expansion

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