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Air conditioning duct for rail vehicle and preparation method of air conditioning duct

A technology for air-conditioning air ducts and rail vehicles, which is applied in the heating/cooling of railway vehicles, railway car body parts, transportation and packaging, etc. It can solve the problems of lack of heat preservation, sound insulation, and lack of fire resistance of polyurethane composite materials in air ducts, etc., to achieve Excellent heat preservation effect, stable and long-lasting heat preservation effect, and the effect of reducing splicing gaps

Active Publication Date: 2018-09-07
CHANGZHOU INST OF LIGHT IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The materials used in the air-conditioning ducts of rail vehicles mentioned in the above documents include aluminum plates and polyurethane composite materials. The air ducts formed by aluminum plates lack the functions of heat preservation and sound insulation; polyurethane composite materials lack fire resistance

Method used

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  • Air conditioning duct for rail vehicle and preparation method of air conditioning duct

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Comparison scheme
Effect test

Embodiment 1）

[0049] See figure 1 , The rail vehicle air-conditioning duct pipe of this embodiment is a composite pipe, including a three-layer structure, which is an inner side layer 1, a fiber-reinforced airgel felt layer 2 and an outer side layer 3 from the inside to the outside.

[0050] In this embodiment, both the inner side layer 1 and the outer side layer 3 are cured prepregs.

[0051] Prepreg is a fiber composite material, which is flexible when uncured and can adapt to different shapes of the mold, and the prepreg has great viscosity when uncured; the cured prepreg is shaped and has strength.

[0052]The prepreg comprises the following components in parts by weight: 50-65 parts of fiber fabric, 20-48 parts of resin, and 0-18 parts of auxiliary agent. The additives are determined according to the resin selected for the prepreg, including curing agent, curing accelerator, thickener, etc.; each additive corresponds to the selected resin. Among them, the fiber fabric is any fabric t...

Embodiment 2）

[0069] The rest of the rail vehicle air-conditioning duct pipe of this embodiment is the same as that of Embodiment 1, except that the inner side layer 1 and the outer side layer 3 are obtained by curing epoxy resin prepreg.

[0070] The epoxy resin prepreg of the present embodiment consists of the following components in parts by weight: 50 parts of 800g / m 2 Biaxial fabric, 40 parts of epoxy resin E51, 4 parts of dicyandiamide curing agent, 2 parts of methylimidazole accelerator, 4 parts of flame retardant ammonium polyphosphate.

[0071] The rest of the preparation method of the rail vehicle air-conditioning duct pipe of the present embodiment are the same as claim 1, except that:

[0072] Step ⑥Put the mold as a whole into the drying room, keep the pressure in the vacuum film at -0.085~-0.01MPa; turn on the heating, slowly rise to 120°C~150°C, after the material is solidified, slowly cool down and demould, and the obtained air duct is made of The fiber-reinforced airgel fe...

Embodiment 3）

[0074] The rest of the rail vehicle air-conditioning duct pipe of this embodiment is the same as that of Embodiment 1, except that the inner side layer 1 and the outer side layer 3 are obtained by curing cyanate resin prepreg.

[0075] The cyanate ester resin prepreg of the present embodiment consists of the following components in parts by weight: 50 parts of 800g / m 2 Biaxial fabric, 40 parts cyanate ester resin, 2 parts cobalt naphthenate, 2 parts nonylphenol.

[0076] The rest of the preparation method of the rail vehicle air-conditioning duct pipe of the present embodiment are the same as claim 1, except that:

[0077] Step ⑥Put the mold as a whole into the drying room, keep the pressure in the vacuum film at -0.085~-0.01MPa; turn on the heating, slowly rise to 150~180°C, after the material is solidified, slowly cool and demould, the obtained air duct tube is made of fiber The reinforced airgel felt layer 2 is composed of cyanate ester composite materials cured on its inn...

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Abstract

The invention discloses an air conditioning duct for a rail vehicle. The duct is a composite pipe, and sequentially comprises an inner side layer, a fiber-reinforced aerogel felt layer and an outer side layer from inside to outside, wherein the inner side layer and the outer side layer are solidified prepreg or metal sheets. The air conditioning duct for the rail vehicle is a pipe which can be directly spliced and installed; the middle fiber-reinforced aerogel layer is light in weight, has a prominent thermal insulation effect, and is an incombustible material, so that the air conditioning duct for the rail vehicle has good fire resistance and thermal insulation effect; since the fiber-reinforced aerogel material is encapsulated between the solidified prepreg layers, after the duct is installed on a bullet train, the problem that the fiber-reinforced aerogel material drops powder is not caused regardless of how the train drives the duct to vibrate, and the thermal insulation effect isaccordingly stable and lasting.

Description

technical field [0001] The invention relates to an air-conditioning duct pipe of a rail vehicle and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, a rail transit mode with subways as the mainstay within cities and high-speed trains as the mainstay between cities has been formed. The environmental comfort in rail train compartments has become one of the important indicators for designing trains. Good air distribution in the train compartment is very important to maintain good thermal comfort conditions and fresh air quality in the compartment. Ensuring uniform air supply in the air duct is a prerequisite for maintaining good air distribution in the compartment. In addition to the air supply speed, the number of air outlets in the main air duct, and the reasonable distribution of the air supply volume between the main air duct and side air ducts, the thermal insulation performance of the air duct is also crucial...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B61D27/00
CPCB29C70/34B61D27/00
Inventor 马洪霞潘玉琴李树白
Owner CHANGZHOU INST OF LIGHT IND TECH
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