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Electric melting pipe fitting with barrier function and manufacturing method thereof

An electrofusion pipe fitting and function technology, applied in the direction of pipes/pipe joints/pipe fittings, household appliances, tubular objects, etc., can solve the problems that the connection cannot play a barrier function and the barrier type non-metal composite pipe is not well connected, etc. Improve the firmness and compressive ability, suitable for promotion, convenient connection and construction

Active Publication Date: 2021-12-31
LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides an electrofusion pipe fitting with a barrier function and its manufacturing method, which solves the problems that the above-mentioned barrier-type non-metallic composite pipe is not well connected, and the joint cannot play a barrier role. Easy construction

Method used

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  • Electric melting pipe fitting with barrier function and manufacturing method thereof
  • Electric melting pipe fitting with barrier function and manufacturing method thereof
  • Electric melting pipe fitting with barrier function and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, an electrofusion pipe fitting with a barrier function includes a pipe fitting body, a copper insert 2, a copper wire 3, an EVOH barrier layer 4, and a terminal post 6. The pipe fitting body includes a plastic outer layer 1 and a plastic inner layer 5, The copper insert 2 is embedded in the pipe fitting body, the EVOH barrier layer 4 is arranged in the middle of the pipe fitting body, between the plastic outer layer 1 and the plastic inner layer 5, and the copper wire 3 is arranged in the pipe fitting body using a pre-wiring process. On the inner surface of the plastic outer layer 1, there are two terminal posts 6, which are respectively arranged at the ends of the outer surface of the plastic outer layer 1, and the copper wire 3 is used as a resistance wire, and the two ends are respectively connected to the two terminal posts 6, The terminal post 6 is connected with an external welding machine, and is used for heating the resistance wire, the...

Embodiment 2

[0040] On the basis of embodiment 1, the preparation method of the described electrofusion pipe with barrier effect comprises the following steps:

[0041] (1) Put the pre-cast copper insert into the mold, and use the injection molding process to inject the EVOH barrier layer first;

[0042] (2) After the EVOH barrier layer is formed and cooled, put on the mold, and use the pre-wiring process for copper wire wiring;

[0043] (3) Carry out the secondary injection molding process again, this time injecting the plastic inner layer and the plastic outer layer respectively;

[0044] (4) Final forming and cooling to complete the preparation.

[0045] The processing temperature of the injection molding process of the present application is controlled at 165-235°C.

Embodiment 3

[0047] On the basis of Example 1, when using the electrofusion pipe fitting with barrier function, firstly, the surface of the end of the plastic pipe fitting to be connected is pretreated to remove the oxide layer, and the pretreated plastic pipe fitting is inserted into the Into the annular cavity formed by the plastic outer layer and the plastic inner layer at both ends of the electrofusion pipe fitting, until the end of the plastic pipe fitting to be connected touches the EVOH barrier layer, stop inserting, connect the terminals on both sides with the external welding machine, and use It is used to heat the resistance wire of the copper wire to heat the inner wall of the electrofusion pipe fitting, turn on the power supply, set the heating time and cooling time, and use the heat and expansion force generated when the power is turned on to melt and connect the outer wall of the plastic pipe fitting with the electrofusion pipe fitting. At the same time, the EVOH barrier layer...

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Abstract

The invention discloses an electric melting pipe fitting with a barrier function. The electric melting pipe fitting comprises a pipe fitting body, a copper insert, a copper wire, an EVOH barrier layer and binding posts, the pipe fitting body comprises a plastic outer layer and a plastic inner layer, the copper insert is embedded in the pipe fitting body, the EVOH barrier layer is arranged in the middle of the pipe fitting body and between the plastic outer layer and the plastic inner layer, the copper wire is arranged on the inner surface of the plastic outer layer by adopting a front wiring process, the number of the binding posts is two, the binding posts are arranged at two ends of the outer surface of the plastic outer layer correspondingly, the copper wire serves as a resistance wire, the two ends of the copper wire are connected with the two binding posts correspondingly, the binding posts are connected with an external welding machine and are used for heating the resistance wire, and therefore the inner wall of the electric melting pipe fitting body is heated, and the electric melting pipe fitting body and two to-be-connected pipes are fused and connected. The invention further provides a preparation method of the electric melting pipe fitting. According to the technical scheme, the problems that a barrier type nonmetal composite pipe is poor in connection, and the barrier function cannot be achieved at the connecting position are solved, and the pipe fitting is convenient to connect and construct and suitable for being popularized.

Description

technical field [0001] The invention belongs to the technical field of plastic composite pipe connection, in particular to an electric fusion pipe fitting with a barrier function and a manufacturing method thereof. Background technique [0002] In pipelines for transporting natural gas and hydrogen, due to the small molecular weight of hydrogen and other gases, it is easy to enter the interior of the pipeline material, causing hydrogen embrittlement and damaging the pipeline. Therefore, most of the hydrogen pipelines on the market are metal alloys, and the cost is very expensive. A few are non-metallic composite pipes. The pipe is composed of multi-layer structures with a barrier layer in the middle, usually EVOH (ethylene-vinyl alcohol copolymer). Because EVOH has good barrier properties, it is widely used in food packaging films. However, the connection of this structural composite pipe has always been a difficult point in the industry, and it is very critical. The quali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L47/03B29C45/14B29C45/00B29L23/00
CPCF16L47/03B29C45/14598B29C45/0053B29L2023/22
Inventor 陈江慧胡锦春霍福磊褚展鹏金崇阳刘跃明
Owner LINHAI WEIXING NEW BUILDING MATERIALS CO LTD
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