Hot melting plastic type connecting structure of threaded steel pipe and machining method of hot melting plastic type connecting structure

Abstract

The invention discloses a hot melting plastic type connecting structure of a threaded steel pipe and a processing method of the hot melting plastic type connecting structure, a plastic plate and a hot melting adhesive film are adhered to a pipe wall in the same shape as a thread line in a hot melting manner, and a joint is formed, so that a metal and nonmetal double-layer sealing connecting structure is formed; according to the mode, the circumferential strength of the connector can be effectively improved, so that the connecting strength of a joint is improved, bonding is firm, the sealing performance is good, the corrosion resistance of the connector is high, construction is easy, operation is convenient, end machining does not need to be specially conducted at a pipe joint for connection, and in the actual using process, the cost is low. A connector of the two sections of threaded steel pipes which are in butt joint front and back is an original cut port of the front section and the rear section formed by cutting off the threaded steel pipes in the production process, and high connection strength and water leakage prevention performance can be kept in the mode.

Description

technical field [0001] The invention relates to a threaded steel pipe connection structure, in particular to a hot-melt plastic type connection structure of a threaded steel pipe and a processing method thereof. Background technique [0002] Traditional galvanized threaded steel pipes have been used in China for many years, but it has been difficult to effectively solve the problem of water leakage at the joints between pipe joints, which has caused many engineering quality accidents. [0003] At present, in the national and industry standards, the recommended connection methods are as follows: [0004] 1. The port is reshaped into annular corrugations and connected by a semi-circular ferrule. The joint strength of this method is greatly reduced, and the joints are always flattened. After reshaping, the zinc layer falls off and is seriously damaged. , the diameter of the front and rear pipe heads is also deviated, the sealing structure often has large gaps, and the problem ...

AI Technical Summary

Problems solved by technology

[0002] Traditional galvanized threaded steel pipes have been used in China for many years, but it has been difficult to effectively solve the problem of water leakage at the joints between pipe joints, which has caused many engineering quality accidents

[0005] 2. It adopts spiral hoop connection, and it is clamped on the front and rear joints of the threaded pipe without secondary shaping. It also has the problems of serious damage to the galvanized layer, unreliable sealing structure, and serious water leakage;

[0006] 3. Weld the flange at the pipe end and connect with bolts. This method requires welding both inside and outside the pipe. The workload is heavy, the cost is high, and the concentricity of the bolt holes is difficult to control. It is very difficult to thread bolts on site. Secondary anti-corrosion is also relatively difficult, and the practical performance is not high

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