New polyethylene pipeline electric fusion welding

在传播领域的流体介质,polyethylene (PE) pipes widely respected in recent years and has been the rapid development of new bearing structure.

A pipe with the traditional gold compared to polyethylene piping systems with light weight, than strength and specific rigidity, durability, corrosion resistance, insulation, composite capability and strong resistance to fracture. Ease of production and installation, low cost, its typical service life of metallic green several times and can save a lot of production and use of energy. It can be used for urban water supply and drainage and gas transmission and distribution system, agricultural irrigation systems, ventilation systems and mud factories, mines, ore pipeline transportation and other fields.

在制造和聚乙烯管道系统laying, pipe connection between the impact strength of its structural integrity and durability of the important aspects. Since polyethylene molecular chain composed of the methylene and has a high degree of symmetry. Determines its polarity is low, so polyethylene pipe connection will not be using solvent bonding method, only mechanical connection or welding. Practice table squat, welding is a high quality, high efficiency plastic pipe connection technology. The relatively mature technologies, including welding socket welding, butt welding, fusion welded. Which belongs to the heating wire melting fusion welded butt-welding, because the construction is simple, portable field equipment, welding speed, and soon obtained the development and promotion. The basic principle is the high-resistance wire Xu first person buried in the plastic casing wall. After docking, Walter current, electric wire heating temperature to the surrounding plastic to melt and blend with each other, after cooling to form a weld.

使用碳毡与聚乙烯层压复合电导复合材料制备为熔融焊接材料，在电阻率的电力变化期间是实用的复合材料非常小，可以稳定地加热到聚乙烯的熔化温度。复合材料形成工艺参数在温度160℃，时间10分钟，压力为10MPa，复合电阻控制10a100Ω。影响焊接强度与加热功率和加热时间融合的因素，它们归因于加热层温度的原理的焊接强度，同时控制加热层140的温度在220℃的范围内，获得理想的焊接强度。因此，不同的输入功率可以选择适当的加热时间以实现所需的焊接效果。电熔焊接，热影响区附近的加热层存在，熔融层和热影响区，聚乙烯结晶度，晶体尺寸会改变，从而影响材料的性能。