Polyurethane high-pressure gas storage tank liner and forming process thereof

A high-pressure gas storage tank and molding process technology, which is applied to fixed-capacity gas storage tanks, pressure vessels, gas/liquid distribution and storage, etc., can solve the problem of complex forming process of gas storage tank liner, poor adhesion of metal joints, Carbon fiber is not firmly bonded and other problems, so as to achieve the effect of easy production process control, good barrier property, and avoid high molding temperature

Active Publication Date: 2022-05-27
知春氢能科技(烟台)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molding process of this type of gas storage tank liner is relatively complicated and sensitive to temperature. The adhesion between polyethylene and nylon and the metal joints at the exhaust ports at both ends is poor, and the adhesion is easy to be weak; and because the material is not extremely properties, and the carbon fiber wrapped around its outer wall is also not firmly bonded
[0005]Now, the production process is simple, the production cost is low, and the single-layer high-pressure gas tank liner with high barrier property, high wear resistance and high structural strength is on the market not yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Taking the preparation of the inner bladder of a hydrogen storage tank as an example, a polyurethane high-pressure gas storage tank inner bladder, the molding process of which includes the following steps:

[0043] (1) The polyurethane prepolymer is used as material A; butanediol is used as material B; the mass ratio of material A and material B is 100:20; the material A and material B are stored in a vacuum of -0.1MPa (Table 1). pressure) in a vacuum silo at 35°C for more than 30min; mix A and B while feeding, maintain 35°C during the mixing process, and continue to stir until the feeding ends;

[0044] (2) electrify and heat the heating pipe for heating the forming mould of the inner bladder of the high-pressure air storage tank, so that the mould is maintained at 115 ℃, and then inject the material liquid obtained in step (1) into the forming mould;

[0045] (3) maintaining the temperature of the molding die in step (2), controlling the gas cylinder liner molding die...

Embodiment 2

[0048] The difference from Example 1 is that, in step (3), the electric heating tube is not turned on, and the pressurized air tank liner forming mold is placed in the drying room, and heated with hot air at 115°C;

[0049] The remaining technical features are the same as those in Embodiment 1.

Embodiment 3

[0051] Taking the preparation of the inner bladder of a hydrogen storage tank as an example, a polyurethane high-pressure gas storage tank inner bladder, the molding process of which includes the following steps:

[0052] (1) The polyurethane prepolymer is used as material A; butanediol is used as material B; the mass ratio of material A and material B is 100:10; the material A and material B are stored in a vacuum of -0.1MPa (Table 1). press) for more than 30 minutes in a vacuum silo at 40 °C; mix A and B while feeding, maintain 40 °C during the mixing process, and continue to stir until the feeding ends;

[0053] (2) electrify and heat the heating pipe for heating the forming mould of the inner bladder of the high-pressure air storage tank, so that the mould is maintained at 115 ℃, and then inject the material liquid obtained in step (1) into the forming mould;

[0054] (3) Maintain the temperature of the forming mold in step (2), control the gas cylinder liner forming mold ...

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PUM

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Abstract

The invention discloses an inner container of a polyurethane high-pressure gas storage tank, which is integrally formed and is made of a polyurethane material. And preferably, a water-based polyurethane material is adopted. In the invention, the inner container of the polyurethane high-pressure gas storage tank is integrally formed through a rotational molding process. The invention further provides a forming process of the polyurethane high-pressure gas storage tank inner container, a rotational molding method is used, and the cross-linking reaction of polyurethane is completed in the rotational molding process. The inner container of the polyurethane high-pressure gas storage tank can effectively block hydrogen, and has wear resistance, tensile strength, tearing strength and damping effect which are higher than those of nylon and polyethylene materials and high adhesion with metal accessories.

Description

technical field [0001] The invention belongs to the field of gas storage tanks, and particularly relates to a polyurethane high-pressure gas storage tank inner tank and a molding process thereof. Background technique [0002] The inner liner of the current high-pressure gas storage tank is generally an aluminum inner liner, which is processed by a high-temperature shrinkage head of a seamless aluminum tube, then heat treatment, and then drilling. Aluminum itself is prone to hydrogen embrittlement, low pressure resistance, heavy weight and complicated production process. [0003] At present, Japan has an injection molding process to produce high-pressure gas storage tank liner, usually made of polyethylene or nylon material. Compared with aluminum liner, it has the advantages of good barrier properties, light weight and long service life. In order to have high barrier properties and high structural strength at the same time, the currently commonly used technology is split in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C1/00F17C1/16B29C41/06B29C41/46B29C41/52B29K75/00
CPCF17C1/005F17C1/16B29C41/06B29C41/46B29C41/52B29K2075/00Y02E60/32
Inventor 林宝树
Owner 知春氢能科技(烟台)有限公司
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