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Rail vehicle air-conditioning duct pipe and preparation method thereof

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. Excellent thermal insulation effect, stable and lasting thermal insulation effect, light weight effect

Active Publication Date: 2021-05-25
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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  • Rail vehicle air-conditioning duct pipe and preparation method thereof

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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 air duct pipe for a rail vehicle. The air duct pipe is a composite pipe, and from the inside to the outside is an inner side layer, a fiber-reinforced airgel felt layer and an outer side layer; the inner side layer and the outer side layer are solidified prepreg or sheet metal. The rail vehicle air-conditioning duct pipe of the present invention can be directly spliced ​​and installed; the fiber-reinforced airgel layer in the middle is light in weight, has an outstanding heat preservation effect, and is a non-combustible material, so that the rail vehicle air-conditioning duct pipe has excellent flame retardancy performance and thermal insulation effect; since the fiber-reinforced airgel material is encapsulated between the cured prepreg layers, after the air duct pipe is installed on the train, no matter how the train drives the air duct to vibrate, there will be no fiber reinforcement The airgel material has no powder falling problem, so the heat preservation effect is stable and long-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 Patents(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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