Novel saddle-shaped pipe fitting and connecting and fixing method thereof in electric fusion welding process

Abstract

The invention relates to plastic pipeline welding technologies, and provides a novel saddle-shaped pipe fitting and a connecting and fixing method of the novel saddle-shaped pipe fitting in the electric fusion welding process. The body of the novel saddle-shaped pipe fitting is a saddle-shaped arc body, a branch pipe is arranged on the arc body, and the positions, on the two sides of the branch pipe, on the arc body are respectively provided with at least one boss. At least one screw hole is formed in one side of each boss, and a meshing structure is arranged on the other side of each boss. The structure of the saddle-shaped pipe fitting is improved, the lower half portion of an original saddle-shaped pipe fitting is omitted, a set of flexible binding belts is adopted for pretightening, the pressure of a fusion area in the welding process of the saddle-shaped pipe fitting is kept fully and stably, the welding quality problem caused by the insufficient pressure of the fusion area under the existing welding condition is solved, the rejection rate of saddle-shaped pipe fitting welding products is reduced, the production and manufacturing cost is saved, and economic benefits are improved.

Description

technical field [0001] The invention relates to plastic pipe welding technology, in particular to a novel saddle-shaped pipe fitting and its connection and fixing method during electric fusion welding. Background technique [0002] There are generally two types of saddle pipe fittings: saddle branch pipe fittings; saddle tee pipe fittings. Saddle pipe fittings are the main pipe fittings to realize the branches of the main line, and its use makes the transmission pipe network present the diversity of network distribution. Install saddle-shaped pipe fittings corresponding to the pipeline specifications at the pipelines that need to branch or realize tees, and use certain welding methods to make the saddle-shaped pipe fittings and pipelines permanently connected, and to ensure the strength and sealing of the joints. The main welding methods of saddle-shaped pipe fittings and main pipes are hot-melt connection and electric fusion connection. [0003] For the electrofusion conn...

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Problems solved by technology

In response to this problem, measures such as increasing the bolt pre-tightening force of the saddle-shaped pipe fittings were adopted in the project. However, even if both sides of the pipe fittings are completely restrained by the bolts, the pressure in the melting zone cannot be obtained because the restrained position is not optimal. well maintained

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