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Novel railway brake hose and preparation method thereof

A technology for brake hoses and railways, applied in hoses, pipes, mechanical equipment, etc., can solve the problems of complex process, low blasting pressure, high cost of vinylon wire, etc., and achieve stable chemical structure, large elongation at break, and calendering good workmanship

Inactive Publication Date: 2017-01-04
NANJING ORIENTLEADER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing railway brake hose has three braided layers, and the existing railway brake hose has three layers of braided layers, all of which are vinylon wires. The cost of the vinylon wire used is relatively high, and it is easy to be resinized during the vulcanization process, resulting in Product defects, the burst pressure drops; the weaving process requires glue, which is not environmentally friendly, the process stability is not good, and the bonding performance is unstable; and the existing production process needs to be extruded four times, after each extrusion Both need to be parked, the process is complex, the production cycle is long, and it is not suitable for the production process of 40-meter-long hard core; in addition, the existing railway brake hose is too hard, which is inconvenient to install; the hydrostatic performance is unstable, and it often breaks There are unqualified phenomena

Method used

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  • Novel railway brake hose and preparation method thereof
  • Novel railway brake hose and preparation method thereof

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Embodiment Construction

[0026] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples. The following examples are only used to illustrate the technical examples of the present invention more clearly, but not to limit the protection scope of the present invention.

[0027] Such as Figure 1-2 Shown: the invention discloses a new type of railway brake hose, which includes an inner rubber layer 1, a composite layer 2, and an outer rubber layer 3 from the inside to the outside;

[0028] The composite layer 2 includes a braided layer 21 and a sandwich film 22 from the inside to the outside; the braided layer 21 adopts at least one of polyester thread, vinylon thread, and rayon;

[0029] The sandwich film 22 is prefabricated by one or a mixture of EPDM, NR, SBR, and CR.

[0030] Further, the inner rubber layer 1 adopts one or a mixture of EPDM, NR, SBR, and CR.

[0031] Further, the outer rubber layer 3 adopts one or...

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Abstract

The invention discloses a novel railway brake hose which comprises an inner adhesive layer, a composite layer and an outer adhesive layer from inside to outside, wherein the composite layer comprises a braid layer and a middle adhesive sheet from inside to outside; at least one of polyester thread, vinylon thread and rayon is adopted for the braid layer; and the middle adhesive sheet is prefabricated from one or a mixture of more of EPDM, NR, SBR and CR.

Description

technical field [0001] The invention belongs to the technical field of railway accessories, and relates to a novel railway brake hose and a preparation method thereof. Background technique [0002] Brake hoses are used in braking devices of vehicles, etc., and transfer the high oil pressure generated from the master cylinder to each wheel and caliper to generate braking force. [0003] The role of the brake hose leads to its high bending fatigue resistance, pressure resistance (oil pressure resistance), braking resistance and other characteristics. At the same time, because the brake pipe is filled with DOT brake fluid for a long time, the inner material of the rubber pipe is easy to be extracted and crystallized or deposited in the brake pipe, and the temperature of the engine compartment will rise, which will cause the rubber pipe to age in advance and lose the use effect. [0004] In order to provide the brake hose with the indicated properties, the brake hose may genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/08B29D23/00
CPCF16L11/086B29D23/001
Inventor 王亮燕俞涛邹惠芳陶平王文明王定东
Owner NANJING ORIENTLEADER TECH CO LTD