Novel plastic pipe fitting capable of preventing inner flanging

Abstract

The invention discloses a novel small-bore plastic pipe fitting capable of preventing an inner flanging. At least one end of the pipe fitting is provided with an annular faucet, and the annular faucet is provided with an outer ring and an inner ring. The outer ring is a ring made of a material the same as that of the pipe fitting; the internal diameter of the outer ring is equal to that of a muzzle bell of a hot-melting socket connecting plastic pipe in the same specification; the inner side of a port of the outer ring is provided with a chamfer angle facing the outer side of the pipe fitting; the inner ring is a thin-wall stainless steel ring; the external diameter of the inner ring is equal to that of the plastic pipe in the same specification; and the outer side of a port of the inner ring is provided with a chamber angle facing the inner side of the pipe fitting. The axial length of an upper section of the inner ring is 1-2 mm longer than the port of the outer ring. The inner ring is uniformly provided with two to four air exhausting vents along a radial direction at the bottom of the faucet, and the outer ring is provided with an observing hole along the radial direction. The novel small-bore plastic pipe fitting has the following obvious effects: no inner flanging exists at the joint of the pipe fitting and a pipeline, the head loss does not exist when water flows through the joint, the air in the faucet is exhausted through the air exhausting vents when the pipe fitting and the pipeline are subjected to hot-melting socket connection, and the cold solder joint cannot be generated at the bottom of the faucet and air bubbles cannot be formed on the welding surface of a pipe wall to influence the welding quality.

Description

Technical field [0001] The invention relates to a new type of plastic pipe fitting which can prevent small-diameter plastic pipe fittings from forming inward flanging when they are hot-melt socketed and connected. Background technique [0002] The inward flanging formed when the existing small-diameter plastic pipe fittings are used for hot-melt socket connection can cause water head loss. Especially the household pipes at the end of the municipal pipe network mostly use small-diameter plastic water supply pipes, a large number of which are connected by hot-melt socket connection, and the inner flange formed by the hot-melt socket connection is serious It affects the water pressure of end users. In order to ensure the water pressure of end users, the municipal pipe network must be pressurized, which increases energy consumption and increases the cost of water supply companies. Contents of the invention [0003] In order to solve the above-mentioned problems, the present i...

AI Technical Summary

Problems solved by technology

[0002] The inward flanging formed when the existing small-diameter plastic pipe fittings are used for hot-melt socket connection can cause water head loss

Especially the domestic household pipes at the end of the municipal pipe network mostly use small-diameter plastic water supply pipes, and a

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