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Vulcanizing-packaging method for polytetrafluoroethylene hose assembly and vulcanizing-packaged polytetrafluoroethylene hose assembly

A technology of polytetrafluoroethylene and hose components, which is applied in the direction of hoses, pipes/pipe joints/fittings, pipes, etc., can solve the problems of low fire resistance temperature, and achieve high fire resistance temperature, light fire resistance and high temperature resistance, and air tightness Good performance and pressure resistance

Inactive Publication Date: 2018-12-25
HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vulcanization encapsulation method for polytetrafluoroethylene hose assemblies to solve the technical problem of low fire resistance temperature in the prior art when vulcanized rubber tubes are directly sleeved

Method used

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  • Vulcanizing-packaging method for polytetrafluoroethylene hose assembly and vulcanizing-packaged polytetrafluoroethylene hose assembly
  • Vulcanizing-packaging method for polytetrafluoroethylene hose assembly and vulcanizing-packaged polytetrafluoroethylene hose assembly
  • Vulcanizing-packaging method for polytetrafluoroethylene hose assembly and vulcanizing-packaged polytetrafluoroethylene hose assembly

Examples

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Effect test

Embodiment 1

[0029] The vulcanized packaged polytetrafluoroethylene hose assembly of this embodiment is a high temperature and fire-resistant polytetrafluoroethylene hose assembly, such as figure 1 As shown, it includes a hose body and a crimping joint 1 arranged at both ends of the hose body as connectors. The main body of the hose includes an inner polytetrafluoroethylene hose layer (inner tube) 3 and a main road metal braided mesh sleeve (metal reinforcement) 4 wrapped outside the polytetrafluoroethylene hose layer. The main road metal braid A glass fiber layer 6 is provided outside the mesh sleeve, and a vulcanized rubber layer 2 is provided outside the glass fiber layer. The length of the vulcanized rubber layer 2 along the axis of the hose body is greater than that of the glass fiber layer 6, so that the rubber layer covers the glass fiber layer. The glass fiber layer includes a glass fiber fabric layer and a glass fiber thread layer wound around the glass fiber fabric layer. The cr...

Embodiment 2

[0043] In the structure of the polytetrafluoroethylene hose assembly of this embodiment, the thickness of the glass fiber layer is 1.5 mm. The thickness of the end part of the vulcanized rubber layer corresponding to the crimping joint is 2mm, and the thickness of the middle part excluding the corresponding part of the crimping joint is 1mm, and the others are the same as in Example 1.

[0044] The preparation method of the polytetrafluoroethylene hose assembly of this embodiment includes the following steps:

[0045] 1) Prepare the raw materials that meet the vulcanization process, then clean the outer surface of the main metal braided mesh sleeve of the PTFE hose assembly, and then apply glue on both ends of the main metal braided mesh sleeve.

[0046] The compound rubber is prepared, mixed with a rubber mixer, and then pressed to a suitable thickness. Then use a blade to cut into a rectangular parallelepiped of appropriate size.

[0047] Cut the glass fiber cloth into a rectangula...

Embodiment 3

[0055] In the structure of the polytetrafluoroethylene hose assembly of this embodiment, the thickness of the glass fiber layer is 3 mm. The thickness of the end portion of the vulcanized rubber layer corresponding to the crimping joint is 2.5 mm, and the thickness of the middle portion excluding the portion corresponding to the crimping joint is 1 mm, and the others are the same as in Example 1.

[0056] The preparation method of the polytetrafluoroethylene hose assembly of this embodiment includes the following steps:

[0057] 1) Prepare the raw materials that meet the vulcanization process, then clean the outer surface of the main metal braided mesh sleeve of the PTFE hose assembly, and then apply glue on both ends of the main metal braided mesh sleeve.

[0058] The compound rubber is prepared, mixed with a rubber mixer, and then pressed to a suitable thickness. Then use a blade to cut into a rectangular parallelepiped of appropriate size.

[0059] Cut the glass fiber cloth into a...

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Abstract

The invention relates to a vulcanizing-packaging method for a polytetrafluoroethylene hose assembly and a vulcanizing-packaged polytetrafluoroethylene hose assembly, and belongs to the technical fieldof rubber vulcanizing. The vulcanizing-packaging method for the polytetrafluoroethylene hose assembly disclosed by the invention comprises the following steps: (1) coating the surface of glass fibrefabric which is coated with insulating paint with a bonding agent, then, wrapping a polytetrafluoroethylene hose assembly with the glass fibre fabric with the surface, which is coated with the bondingagent, inward, and forming a glass fibre layer; (2) wrapping the outer side of the glass fibre layer with rubber to form a rubber layer; and (3) vulcanizing to obtain the vulcanizing-packaged polytetrafluoroethylene hose assembly. According to the vulcanizing-packaging method for the polytetrafluoroethylene hose assembly disclosed by the invention, a vulcanized rubber layer is formed by adoptingthe method of directly vulcanizing after the glass fibre layer outside a polytetrafluoroethylene hose is wrapped with the rubber. According to the vulcanizing-packaged polytetrafluoroethylene hose assembly obtained by the method, an outer layer is not likely to loose when the vulcanizing-packaged polytetrafluoroethylene hose assembly is used; the refractory temperature is high; and the vulcanizing-packaged polytetrafluoroethylene hose assembly is suitable to be used in all places.

Description

Technical field [0001] The invention relates to a vulcanization packaging method of a polytetrafluoroethylene hose assembly and a vulcanized and encapsulated polytetrafluoroethylene hose assembly, belonging to the technical field of rubber vulcanization. Background technique [0002] As an assembly, the PTFE hose assembly is often used as a pipeline for conveying gas or liquid. The PTFE hose assembly is generally composed of a PTFE inner tube, a metal reinforcement layer and metal connectors at both ends. The PTFE hose assembly has light weight, high pressure resistance, corrosion resistance, and a wide operating temperature range. advantage. [0003] With the development of science and technology, different application fields have put forward higher requirements for the high temperature fire resistance of PTFE hose assemblies. In the prior art, the high-temperature and fire-resistant polytetrafluoroethylene hose assembly is generally directly covered with a fire-resistant tube o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C53/56B29C53/84B29C53/80F16L11/12
CPCB29C53/566B29C53/8083B29C53/845F16L11/12
Inventor 姜银松张启明莫延亮李志鹏刘伟邵真贵李琳琳郭克伟刘来运叶卫林
Owner HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH
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