Low-carbon steel heating wire PE electric melting pipe fittings

Abstract

The invention discloses a kind of low carbon steel heater PE electric melting pipe fittings which includes a PE pipe fittings and a heater compounding in the wall of PE pipe sittings which are two parallel low carbon steel heaters. The heater described above after over-plastic directly circles homogeneously and compounds in the wall of PE pipe sittings by annealing soften, surface burnish, multiple layers coppering corrosion protection, oxidation resistant treatment, and over-plastic treatment and the over-plastic adopts the way of making the two heaters paralleled over-plastic. When using the PE electric melting pipe sittings to connect the PE pipe implant the PE pipe into the PE electric melting pipe sittings and then use the electric melting pipe soldering machine to cut-in electricity for the two-pole of heater winding and make the low carbon steel heater generated heat by the current and then melt the PE pipe and the contact surface plastic of PE electric melting pipe sittings then solvate and solder the PE pipe and the PE electric melting sittings. The invention using in soldering the PE pipe has the low cost and high soldering mission success rate merits and saves the electrical power.

Description

technical field [0001] The invention relates to a low-carbon steel heating wire PE electric melting pipe fitting. Background technique [0002] In recent years, due to its unique and good weldability (welding), convenient connection (hot-melt butt joint, electric fusion connection), crack resistance, environmental protection, sanitation, and recyclable use, etc. , and become the best choice for urban gas transmission pipeline network and medium and low pressure water supply pipeline network, and has developed rapidly in our country. With the popularization of the application of PE pressure pipes, PE electrofusion pipe fittings have been widely used for their convenient construction and reliable welding, especially in the field of urban gas, and have also begun to be widely used in the field of water supply. [0003] PE electric fusion pipe fittings are used to connect PE pipes. The heating wires of existing PE electric fusion pipe fittings are made of single-strand red copp...

AI Technical Summary

Problems solved by technology

[0005] 1. The cost of copper wire is too high. The current market price of copper wire with a specification of 1 square millimeter is 76,000 yuan / ton, and the highest is 86,000 yuan / ton. The cost price after processing into a plastic wire for direct use is 100,000 yuan / ton or so; causing copper heating wires to account for 10-15% of the total cost of the entire pipe fittings, which increases the production cost of PE electrofusion pipe fittings, and because the heating wires are disposable consumables, the pipeline cannot be recycled and reused within the service life

[0006] 2. The copper wire is overmolded into a single wire. Due to the large number of winding coils and the small spacing between the windings, after the plastic is heated and melted, the warping and movement of the copper wire may cause a short circuit between turns, and the copper wire elongates in a high temperature environment. The rate is large, and after warping and deformation during the heating process, it is easy to contact adjacent windings, causing a short circuit, resulting in the failure of the entire tube welding, which greatly increases the failure rate of welding

[0007] 3. The tensile strength of the copper wire is 200-220N. The copper wire is easy to break during the production process. Once it breaks again, the product will be scrapped directly

[0008] 4. The copper wire itself carries a relatively large current. Under the condition of energizing to generate the same heat, the single-wire winding using a 1 square millimeter copper wire needs to provide a current of 40A from the welding machine to achieve the heating effect and increase the welding equipment. Difficulty in production and waste of electricity

high power consumption