Connection Fixing Method and Strip Clamp for Saddle-shaped Pipe Fittings by Electric Fusion Welding

Abstract

The invention relates to a plastic pipe welding technology, and aims at providing a connection fixing method during electrofusion welding of a saddle-shaped pipe fitting and a band-shaped clamp thereof. The connection fixing method during electrofusion welding of the saddle-shaped pipe fitting comprises the steps: putting the saddle-shaped pipe fitting on a main pipe, getting at least two band-shaped clamps and respectively installing at two sides of the a branch pipe of the saddle-shaped pipe fitting, and after welding is finished, dismounting the band-shaped clamps. One joint at one end of the main body of the band-shaped clamp is provided with a strip-shaped groove, the one joint at the other end is provided with a clamping mechanism and a spring, and the position of the clamping mechanism is provided with a pressure sensor and a minisize electronic display which are in mutual connection. By increasing the extra clamps for further clamping, the stable maintenance of the pressure of a fusion zone in the welding process of the saddle-shaped pipe fitting is fully guaranteed, the welding quality problem caused by insufficiency of the fusion-zone pressure under conventional welding conditions is solved, the rejection rate of the saddle-shaped pipe fitting product is reduced, and the economic benefit is improved.

Description

technical field [0001] The invention relates to plastic pipe welding technology, in particular to a connection and fixing method and a belt-shaped clamp for saddle-shaped pipe fittings during electrofusion 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 elect...

AI Technical Summary

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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