Polyethylene electrofusion socket fittings with external display markings and resistance wire stops

Abstract

The invention provides an external display mark of a polyethylene electro-fusion socket pipe fitting and a limiting device for resistance wires. The external display mark of the polyethylene electro-fusion socket pipe fitting comprises a pipe body. Sockets are formed in the pipe body. The outer wall of the pipe body is provided with binding post protective sleeves. Binding posts are arranged in bodies of the binding post protective sleeves. Fusion regions are arranged on the inner wall of the pipe body. The resistance wires are arranged in the fusion regions. One end of each resistance wire is connected with the corresponding binding post. The external display mark of the polyethylene electro-fusion socket pipe fitting is characterized in that the middle of the inner wall of the pipe body is provided with stop keys which make contact with the end face of an inserted pipe; the outer wall of the pipe body is provided with stop key marking ribs; the stop key marking ribs correspond to the stop keys in position; the inner wall of the mouth portion of each socket of the pipe body is provided with limiting grooves.

Description

technical field [0001] The invention relates to an electric fusion pipe fitting, in particular to a polyethylene electric fusion socket pipe fitting with an outer display mark and a resistance wire limiting device. Background technique [0002] The polyethylene electric fusion pipe fittings are connected to the electric fusion welding machine through the terminal, and the electric fusion welding machine outputs a constant voltage to supply the assembled polyethylene electric fusion socket pipe fittings and polyethylene pipes, so that the resistance wire preset inside the pipe fittings generates Heat, the resistance wire heats the pipe fittings and pipes, and the molecular chains of the pipe fittings and pipes in the molten state are reconnected under a certain pressure. After the specified welding time is reached, the pipe fittings and pipes enter the cooling stage. During the cooling process, the polyethylene between the pipe fittings and pipes The molecular chain rearrange...

AI Technical Summary

Problems solved by technology

There is no positioning mechanism on the inner wall of the existing polyethylene electrofusion socket pipe fittings, so that the pipe is inserted into the pipe fitting too long or too short, resulting in the failure of welding between the welded pipe and the pipe fitting, or even if it has been welded, there are extreme problems because the installation is not in place. major safety hazards (such as Figure 4 As shown), in addition, there is no marking mechanism for the insertion depth of the pipe on the outside of the pipe fitting. During construction, a ruler should be inserted into the pipe fitting for measurement, and then the oxide layer should be scraped off the surface of the pipe according to the measured depth, so that not only the operation It is very troublesome and reduces work efficiency, and the naked eye cannot directly observe the internal depth, resulting in large errors

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