PE electric-melting pipeline valve

Abstract

This invention discloses one PE fused pipe valve which includes the valve body and valve core. At the bottom of the valve core is the sealing part which is a cone surface. It is shaped as a notch in the bottom of the valve body facing the core. The two terminals of the pipeline internal wall have an electric heater. This invention, which adopts the fit design of the cone surface, enhances the compactness of the seal in order to increase the seal efficiency. This decreases the requirements for accuracy of size in order to make it easier and more suitable for producing the large and medium sized valves. The electric heater in the pipe internal wall makes it possible to connect directly with the plastic pipe instead of with additional fused fittings. It also prolongs the valve service life which last for the same time as the pipe. It increases the ease of production, improves the efficiency and decreases the cost of installation.

Description

technical field [0001] The invention relates to a PE electrofusion pipeline valve. Background technique [0002] There are many kinds of pipeline valves, each valve manufacturing material is mainly divided into ordinary cast steel, alloy steel, non-ferrous metal, PE polyethylene plastic and so on. [0003] Existing PE valves are mainly sphere-sealing methods, which use sphere surface sealing methods, which require high dimensional accuracy, and the processing of plastic spheres is quite difficult, especially for the production of large and medium-sized valves, and rubber gaskets are used outside the spheres, and rubber gaskets exist Defects such as aging and strain have reduced the overall service life of the valve to a certain extent. [0004] With the development of science and technology, the emergence of PE plastic steel wire reinforced pipes, steel mesh reinforced pipes and the application of electrofusion pipe fittings in natural gas pipelines have put forward higher ...

AI Technical Summary

Problems solved by technology

[0005] Traditional steel and alloy steel valves are in use for 3-5 years at most, and as short as 1-2 years, they will be scrapped and replaced due to corrosion and other reasons.

Although the service life of non-ferrous metal valves has been improved, the price of non-ferrous metals is expensive, such as figure 1 As shown, if the valve 10 is connected to the PE pipeline 20, two more sets of electrofusion flanges 30 are needed, and the installation cost is high.

[0006] Existing PE plastic valves, such as figure 2 As shown, when the plastic valve 10 is installed and used in the PE plastic steel wire reinforced and steel mesh reinforced pipeline 20, the two ends must be connected with the electric fusion pipe fittings 40 of the same specification. As the diameter of the pipe increases and the specification increases, the installation and use costs It needs to be larger, and the connection is relatively cumbersome, and the failure rate is high

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