Joint of metal and plastic pipe line and making method thereof

A technology for pipe joints and metal pipes, applied in the direction of pipes/pipe joints/fittings, sleeves/sockets, passing elements, etc., which can solve the problem of difficult control of the heating temperature range and loose contact between plastic bobbins and metal parts. , non-applicable and other issues

Inactive Publication Date: 2002-05-15
宁波宇华实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are following defects in the pipe joints manufactured by the existing technology of hot pressing process: 1. The joint surface of the plastic bobbin and the metal part has low resistance to axial tensile force; Low strength. Third, the connection surface between the plastic bobbin and the metal parts is not in tight contact, and the sealing is poor.
The reason for this is that in the hot pressing process of producing metal and plastic pipe joints, the heating temperature range to soften the plastic is difficult to control, and the process stability is poor
In addition, the application range of this process is narrow, and it is not suitable for plastics with a narrow softening range.

Method used

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  • Joint of metal and plastic pipe line and making method thereof
  • Joint of metal and plastic pipe line and making method thereof

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Embodiment Construction

[0008] The technical solution of the invention will be further described in detail below in conjunction with the accompanying drawings.

[0009] as attached figure 1 As shown, the metal-plastic pipeline joint of the present invention includes a metal pipe section 1 and a plastic pipe section 2, and an outer metal sleeve 3 concentric with the metal pipe section is sleeved at one end of the metal pipe section. The inner end of the outer metal sheath 3 is in a closed state with the metal pipe section, and the outer end of the outer metal sheath is slightly longer than the metal pipe section open end, so that the outer metal sheath and the metal pipe section this end just form a semi-closed annular cavity 4. The outer wall of the annular cavity 4 is the inner wall of the outer metal sheath, and the inner wall of the annular cavity is the outer wall of the metal pipe section. Several grooves 5 are arranged on both side walls inside the annular cavity. One end of the plastic pipe ...

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Abstract

The present invention relates to a joint for plastic and metallic pipes and its production method. It is characterized by that one end of the metallic pipe section of said joint is equipped with a cover-connected external metallic sleeve which is concentric with said metallic pipe section and its inner end is closed, the external metallic sleeve and said metallic pipe section are formed into a ring-shaped cavity whose internal two side walls are equipped with several recesses, one end of the plastic pipe section connected with the metallic pipe section is inserted into the ring-shaped cavity, and the cavity chamber and recesses are filled. Said joint is made up by adopting injection-moulding process, and possesses high axial tensile and radial torsional strength and good sealing property, can be extensively used in industrial fields in which the gas, liquid or other fluid is transmitted by using pipeline.

Description

technical field [0001] The invention relates to a plastic pipeline connector and a manufacturing method thereof, in particular to a plastic-metal pipeline connector and a manufacturing method thereof. Background technique [0002] Today, with the vigorous development of the chemical industry, especially the plastics industry, "replacing steel with plastic" has been realized in more and more industries. In the construction industry, it has become an irreversible development trend to use plastic pipes instead of metal pipes to be laid in buildings as upper and lower water pipes, gas pipes, cable pipes, and communication pipes. In other industrial fields, such as petroleum industry, chemical industry, food industry...wherever it involves the transportation of gas, liquid or other fluids, pipelines are used. Therefore also all are faced with or are about to face the technological transformation problem that replaces metal pipe with plastic pipe. However, metal pipes cannot be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L21/00
Inventor 许正奎孙兆儿
Owner 宁波宇华实业股份有限公司
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