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Hot-melt docking method for PE pipes

A hot-melt butt joint and pipe technology, which is applied in the field of PE pipe connection, can solve the problems that workers need to rely on experience in operation and the preparation method is simple, etc., and achieve the effect of strong operability

Inactive Publication Date: 2015-01-07
NINGGUO DONGXING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by this practical invention is to provide a PE pipe hot-melt butt joint method, which overcomes the shortcomings of the existing PE pipe hot-melt butt joint method that the preparation method is simple, there is no digitization of the operation process, and workers need to rely on experience for operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of wall thickness is 2.00mm, the diameter is 160mm PE pipe hot-melt butt joint method comprising the following steps:

[0019] (1) Pretreatment: Place the two PE pipes to be connected on the fuser fixture at the same time, drag the other end of each pipe to the same level with a pipe bracket, and mill the end faces of the pipes to be connected with an electric milling cutter Flat to ensure that the butt joint surfaces of the two pipes are fully matched;

[0020] (2) Preheating: Turn on the power supply of the heating plate, after the temperature rises to a constant temperature, place it between the end faces of the two pipes, start the electro-hydraulic device of the pipes so that the two pipes are completely in contact with the electric heating plate at the same time, and stop when the heating surface of the pipe is crimped. Heating, the temperature of the heating plate is 200°C, the pressure of the hydraulic device: 0.10MPa, the curling height: 0.5mm;

[0021]...

Embodiment 2

[0024] A method for hot-melt butt jointing of PE pipes with a wall thickness of 32.300mm and a diameter of 630mm includes the following steps:

[0025] (1) Pretreatment: Place the two PE pipes to be connected on the fuser fixture at the same time, drag the other end of each pipe to the same level with a pipe bracket, and mill the end faces of the pipes to be connected with an electric milling cutter Flat to ensure that the butt joint surfaces of the two pipes are fully matched;

[0026] (2) Preheating: Turn on the power supply of the heating plate, after the temperature rises to a constant temperature, place it between the end faces of the two pipes, start the electro-hydraulic device of the pipes so that the two pipes are completely in contact with the electric heating plate at the same time, and stop when the heating surface of the pipe is crimped. Heating, the temperature of the heating plate is 215°C, the pressure of the hydraulic device is 0.35MPa, and the curling height ...

Embodiment 3

[0030] A method for hot-melt butt jointing of PE pipes with a wall thickness of 10.00 mm and a diameter of 300 mm comprises the following steps:

[0031] (1) Pretreatment: Place the two PE pipes to be connected on the fuser fixture at the same time, drag the other end of each pipe to the same level with a pipe bracket, and mill the end faces of the pipes to be connected with an electric milling cutter Flat to ensure that the butt joint surfaces of the two pipes are fully matched;

[0032] (2) Preheating: Turn on the power supply of the heating plate, after the temperature rises to a constant temperature, place it between the end faces of the two pipes, start the electro-hydraulic device of the pipes so that the two pipes are completely in contact with the electric heating plate at the same time, and stop when the heating surface of the pipe is crimped. Heating, the temperature of the heating plate is 210°C, the pressure of the hydraulic device is 0.25MPa, and the curling heigh...

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Abstract

The invention discloses a hot-melt docking method for PE pipes. The hot-melt docking method comprises the following steps of (1) pretreatment: milling to-be-docked end surfaces of the pipes to be smooth by using an electrically milling cutter, so as to guarantee the docking surfaces of two pipes to fit completely; (2) preheating: turning a power source of a heating plate on, heating to a constant temperature, putting the heating plate between end surfaces of the two pipes, starting a pipe electro-hydraulic device to contact two pipe surfaces with the heating plate completely at the same time, and heating until heating surfaces of the pipes crimp; (3) melting: adjusting a pressure of the electro-hydraulic device to 0.01-0.05 MPa and heating for 30-280 s when crimp in the step (2) reaches a predetermined height; (4) docking: drawing the heating plate out, restarting the hydraulic device to fully dock the melted end surfaces of the two pipes and lock the hydraulic device. Compared with a conventional docking method, the hot-melt docking method provided by the invention has the significant advantages that the strength of a hot-melt interface of the PE pipes is higher than that of a pipe body; the joint is not liable to fracture due to the effects of soil movement or live load; and the method is specific and digitized and has high operability.

Description

technical field [0001] The invention relates to a PE pipe connection method, in particular to a PE pipe hot-melt butt joint method. Background technique [0002] Polyethylene is a typical thermoplastic. Because PE pipes have many advantages such as non-toxic, tasteless, odorless, good cold resistance, heat resistance and chemical stability, high rigidity and toughness, good mechanical properties, and convenient installation, etc., It is widely used in building water supply and drainage, buried drainage pipes, gas pipelines and telecommunications engineering and other fields. This type of piping system is connected by using thermoplastic hot-melt connection to realize the integration of piping system connection, which greatly reduces the phenomenon of dripping, leaking, running, and popping of the piping system, and substantially improves the application reliability of the piping system. However, the operation accuracy of the hot-melt butt joint is relatively high. If the ho...

Claims

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Application Information

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IPC IPC(8): B29C65/18
Inventor 方家红
Owner NINGGUO DONGXING IND
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