Stainless steel wire strengthened structure of polytetrafluoroethylene flexible pipe assembly with 35MPa pressure rating

Abstract

The invention relates to a stainless steel wire strengthened structure with 35MPa pressure rating. The stainless steel wire strengthened structure is composed of a polytetrafluoroethylene inner pipe, a first stainless steel wire wound structure, a second stainless steel wire wound structure, a third stainless steel wire wound structure, a fourth stainless steel wire wound structure, a first stainless steel wire woven structure and a second stainless steel wire woven structure. The first stainless steel wire wound structure, the second stainless steel wire wound structure, the third stainless steel wire wound structure and the fourth stainless steel wire wound structure are sequentially attached on the outer surface of the polytetrafluoroethylene inner pipe, and the first stainless steel wire woven structure and the second stainless steel wire woven structure are sequentially attached on the outer surface of the wound structure. The polytetrafluoroethylene inner pipe has a pipe-shaped structure with a hollow middle part, the strengthened angles of the first stainless steel wire wound structure, the second stainless steel wire wound structure, the third stainless steel wire wound structure and the fourth stainless steel wire wound structure can be realized by controlling the size of wound strokes and wound outer diameters, and the strengthened angles of the first stainless steel wire woven structure and the second stainless steel wire woven structure can be realized by controlling the size of the woven strokes and the woven outer diameters. In the obtained strengthened structure, the working pressure of a final product meets the requirement of 35MPa, and the room temperature burst pressure meets the requirement of 140MPa.

Description

technical field [0001] The invention relates to a stainless steel wire reinforcement structure of a 35MPa pressure grade polytetrafluoroethylene hose assembly. Background technique [0002] The PTFE hose assembly consists of a PTFE inner tube, a stainless steel wire reinforcement structure, and metal connectors. Among them, the stainless steel wire reinforcement structure plays a role in improving the pressure bearing effect of the polytetrafluoroethylene inner tube. [0003] Under normal circumstances, the pressure resistance of the PTFE inner tube is 0.5MPa-2.5MPa, and the working pressure of the final product after the PTFE inner tube is reinforced with stainless steel wire can reach 21MPa-28MPa. Therefore, stainless steel wire reinforcement technology has been widely used in 21MPa~28MPa hose assemblies in the aviation and aerospace fields. [0004] With the continuous development of aviation and aerospace technology, the PTFE hose assembly has been required to reach ...

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Problems solved by technology

[0004] With the continuous development of aviation and aerospace technology, the PTFE hose assembly has been required to reach a pressure level of 35MPa. After the strength calculation and test verification of stainless steel wire, the original "single-layer winding structure (composed of two layers of winding structure with opposite winding directions) Composition) + double-layer braided structure" stainless steel wire reinforced structure can no longer meet the requirements of this pressure level

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