Rubber-plastic composite hydrogen filling hose

Abstract

The utility model discloses a rubber and plastic composite hydrogen filling hose, which belongs to the technical field of high pressure resistant pipelines, and comprises a lining layer, an inner rubber layer, middle rubber layers and steel wire layers, the lining layer is of a hollow tubular structure, the inner rubber layer is arranged on the outer side of the lining layer, and a plurality of groups of middle rubber layers and steel wire layers which are alternately arranged are arranged on the outer side of the inner rubber layer; the lining layer is made of a plastic material, and the inner rubber layer and the middle rubber layer are both rubber layers; the problems that according to an existing hydrogen filling hose thermoplastic hose, leakage is likely to occur at the joint buckling position, a steel wire layer is likely to be abraded due to direct contact, and the service life is short are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure resistant pipelines, in particular to a rubber-plastic composite hydrogen filling hose. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Hydrogen energy is a recognized clean energy source, and it is emerging as a low-carbon and zero-carbon energy source. Hydrogen can be produced in a variety of ways, with little resource constraints. In fuel cells, hydrogen only generates water through reactions, and does not emit pollutants. In addition, hydrogen has the advantages of high calorific value, high energy, storability, renewability, and zero pollution, which makes the proportion of hydrogen in fuel substitution continue to increase. Using hydrogen energy with zero carbon emissions is the only way to achieve the ultimate goal of net zero emissions in transportation, which has gradually shown the development momentum of hydrogen energy in the field of transportation energy, and the promotion of hydrogen fuel cell vehicles and the construction of hydrogen refueling stations have entered a rapid development stage. The hydrogen energy vehicle market has broad prospects. It is estimated that by 2030, China's hydrogen energy vehicles will exceed 3 million, and the global hydrogen energy vehicle market will exceed 10 million. At the same time, the supporting facilities of hydrogen refueling stations will become more and more popular.

[0004] The hydrogen filling pipe currently on the market is a thermoplastic hose with the following structure: the inner layer is made of plastic, the middle layer is four layers of steel wire winding, and the outer layer is made of nylon. The hose has good dimensional stability, high pressure resistance, and simple production process, but it is also brittle and easy to crack. The material has poor resistance to permanent deformation under high temperature compression, poor sealing, and is prone to leakage at the joint buckle, resulting in a short product life. The steel wire layers are bonded with adhesives, which have poor bonding effects and small thickness. During use, the steel wires are in direct contact and rub against each other, which can easily break the steel wires and reduce their service life. At the same time, the adhesive has little restraint on the steel wires, and the steel wires are easy to spread out when cut, causing inconvenience in use. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the embodiments of the utility model is to provide a rubber-plastic composite hydrogen filling hose.

[0006] In order to achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0007] A rubber-plastic composite hydrogen filling hose comprises: an inner lining layer, an inner rubber layer, a middle rubber layer and a steel wire layer. The inner lining layer is a hollow tubular structure. The inner rubber layer is arranged on the outer side of the inner lining layer. The outer side of the inner rubber layer is provided with a plurality of groups of alternately arranged middle rubber layers and steel wire layers. The inner lining layer is made of plastic material, and the inner rubber layer and the middle rubber layer are both rubber layers.

[0008] The utility model improves the pressure bearing performance and elasticity of the hose through the composite structure of the inner lining layer and the inner rubber layer, so that the hose has a better permanent deformation resistance effect when in use, and the buckled joint position is not prone to leakage, so that the pipe body has better sealing performance and extends the service life of the pipe body; the middle rubber layer and the steel wire layer are alternately arranged, and the middle rubber layer bonds the multiple steel wire layers into a whole. The middle rubber layer has a certain thickness and can separate each layer of steel wire from each other without direct contact, thereby avoiding friction damage to the steel wires.

[0009] In some embodiments, four layers of the middle rubber layer and four layers of the steel wire layer are provided respectively, and the middle rubber layer and the steel wire layer are provided alternately.

[0010] In some embodiments, an inner rubber protective layer is provided between the inner rubber layer and the middle rubber layer, and the inner rubber protective layer is used to buffer the cutting of the inner rubber layer by the steel wire layer.

[0011] In some embodiments, the inner rubber protective layer is at least one fiber reinforced layer, and the material of the fiber reinforced layer is one of nylon, polyester or aramid.

[0012] In some embodiments, the inner rubber protective layer is a fiber woven layer or a mesh cloth, which is wound on the inner rubber layer.

[0013] In some embodiments, the steel wire layer is a mesh structure and is wound around the middle rubber layer.

[0014] In some embodiments, an outer rubber layer is disposed on the outermost side of the hose, and the outer rubber layer is a rubber layer for protecting the hose.

[0015] In some embodiments, the thickness of the middle rubber layer is 0.15-0.4 mm, and the thickness of the lining layer is 0.3-0.8 mm.

[0016] In some embodiments, the material of the lining layer includes, but is not limited to, nylon, polyoxymethylene, fluorine-containing polymer, or polyester resin.

[0017] In some embodiments, the main rubber of the inner rubber layer is nitrile rubber.

[0018] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0019] 1. The technical solution of the utility model adopts a rubber-plastic composite product structure to replace the original thermoplastic hose, so that the tube body has better sealing performance, the buckle joint position is not prone to leakage, and the tube body has a long service life; the middle rubber layer of rubber material is used between the steel wire layers to replace the original adhesive, which can bond the layers of steel wire into a whole and separate the layers of steel wire to prevent friction between adjacent steel wire layers, and the steel wire is not easy to fall apart, thereby improving the service life of the hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a schematic diagram of the structure of a hydrogen filling hose in one or more embodiments of the utility model;

[0022] In the figure: 1, inner lining layer; 2, inner rubber layer; 3, inner rubber protective layer; 4, first middle rubber layer; 5, second middle rubber layer; 6, third middle rubber layer; 7, fourth middle rubber layer; 8, first steel wire layer; 9, second steel wire layer; 10, third steel wire layer; 11, fourth steel wire layer; 12, outer rubber layer.

[0023] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0025] As introduced in the background technology, the thermoplastic hose of the hydrogen filling hose in the prior art is prone to leakage at the joint buckling point. At the same time, the steel wires of the two adjacent layers are directly in contact and rubbed, which is easy to wear off, affecting the service life of the hose. In order to solve the above technical problems, the utility model proposes a rubber-plastic composite hydrogen filling hose.

[0026] like Figure 1 As shown, one or more embodiments of the utility model disclose a rubber-plastic composite hydrogen filling hose, which includes, from inside to outside, an inner lining layer 1, an inner rubber layer 2, a middle rubber layer, a steel wire layer and an outer rubber layer.

[0027] The inner lining layer 1 is made of plastic material, arranged in the innermost layer, in contact with high-pressure hydrogen, and is a hollow tubular structure. An inner rubber layer 2 is arranged outside the inner lining layer 1. The inner rubber layer 2 is a rubber layer with a thickness of 0.3-0.8 mm. The inner lining layer 1 and the inner rubber layer 2 are bonded together, and a middle rubber layer and a steel wire layer are arranged outside the inner rubber layer 2. Specifically, the inner rubber layer 2 uses nitrile rubber as the main rubber, and the composition and preparation of the material are both prior art.

[0028] Optionally, the middle rubber layer and the steel wire layer are each provided with 4 layers, and the middle rubber layer and the steel wire layer are alternately provided; Figure 1As shown, the first middle rubber layer 4, the first steel wire layer 8, the second middle rubber layer 5, the second steel wire layer 9, the third middle rubber layer 6, the third steel wire layer 10, the fourth middle rubber layer 7, and the fourth steel wire layer 11 are arranged in sequence from the inside to the outside. The middle rubber layer bonds the steel wire layers into a whole, and at the same time bonds the steel wire layers to the adjacent layers together. For example, the second middle rubber layer 5 bonds the first steel wire layer 8 and the second steel wire layer 9; the first middle rubber layer 4 is bonded to the inner rubber protective layer 3, and the fourth steel wire layer 11 is bonded to the outer rubber layer 12.

[0029] Specifically, the thickness of the middle rubber layer is 0.15-0.4mm, which is small in thickness, good in bonding performance, and good in aging resistance and bending resistance. The middle rubber layer is provided to separate adjacent steel wire layers from each other, so that they do not directly contact and rub, thereby avoiding damage to the steel wires. It can also bond the steel wires of different steel wire layers into a whole, so that the steel wires are not easy to fall apart during cutting, and still maintain good performance during long-term bending, thereby extending the service life of the hose.

[0030] Optionally, an inner rubber protective layer 3 is provided between the inner rubber layer 2 and the middle rubber layer. The inner rubber protective layer 3 is introduced to prevent the steel wire from directly contacting the inner rubber layer 2, buffer the cutting of the inner rubber layer 2 by the steel wire, and greatly improve the service life of the hose.

[0031] Optionally, the inner rubber protective layer 3 is one or two fiber-reinforced layers, the fiber-reinforced layer is made of nylon, polyester, or aramid, and is a fiber braided layer or mesh cloth, which is wound on the inner rubber layer 2. Nylon, polyester, and aramid are all existing technologies. The reinforcement layer has the characteristics of high temperature resistance, low temperature resistance, good adhesion to rubber, low specific gravity, and good softness. Optionally, the steel wire layer is a mesh structure, which is wound on the middle rubber layer. The diameter and number of steel wires are designed with reference to the working pressure and the bursting pressure and the hydrogen filling hose. The diameter of the steel wire is 0.25-0.5mm.

[0032] Optionally, because hydrogen molecules are small and have strong permeability, a plastic material with good hydrogen resistance and airtightness should be selected, such as nylon (PA), polyoxymethylene (POM), fluorinated polymer (EFEP), and polyester resin (PET); the thickness is set to 0.3-0.8mm to maintain the good hydrogen resistance and airtightness of the filling hose. The above materials are all existing technologies. Among them, EFEP has good chemical resistance and corrosion resistance, is inert to most chemicals and solvents, has good weather resistance, has an aging life among plastics, is highly lubricating, and has the lowest friction coefficient among solid materials.

[0033] Optionally, an outer rubber layer 12 is provided on the outermost side of the hose, and the outer rubber layer 12 is a rubber layer. Specifically, the outer rubber layer 12 is made of weather-resistant and wear-resistant rubber, which is a prior art rubber material. The wear-resistant and aging-resistant rubber layer can well protect the steel wire layer from damage, thereby extending the service life of the hose.

[0034] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A rubber-plastic composite hydrogen filling hose, characterized in that: include: The inner lining layer, the inner rubber layer, the middle rubber layer and the steel wire layer, the inner lining layer is a hollow tubular structure, the inner rubber layer is arranged on the outside of the inner lining layer, and the outer side of the inner rubber layer is provided with multiple groups of alternately arranged middle rubber layers and steel wire layers; the inner lining layer is made of plastic material, and the inner rubber layer and the middle rubber layer are both rubber layers.

2. The rubber-plastic composite hydrogen filling hose according to claim 1, characterized in that: The middle rubber layer and the steel wire layer are each provided with 4 layers, and the middle rubber layer and the steel wire layer are alternately provided.

3. The rubber-plastic composite hydrogen filling hose according to claim 1, characterized in that: An inner rubber protective layer is arranged between the inner rubber layer and the middle rubber layer, and the inner rubber protective layer is used for buffering the cutting of the inner rubber layer by the steel wire layer.

4. The rubber-plastic composite hydrogen filling hose according to claim 3, characterized in that: The inner rubber protective layer is at least one fiber reinforced layer, and the material of the fiber reinforced layer is one of nylon, polyester or aramid.

5. The rubber-plastic composite hydrogen filling hose according to claim 4, characterized in that: The inner rubber protective layer is a fiber woven layer or a mesh cloth, which is wound on the inner rubber layer.

6. The rubber-plastic composite hydrogen filling hose according to claim 1, characterized in that: The steel wire layer is a mesh structure and is wound around the middle rubber layer.

7. The rubber-plastic composite hydrogen filling hose according to claim 1, characterized in that: An outer rubber layer is arranged on the outermost side of the hose, and the outer rubber layer is a rubber layer used for protecting the hose.

8. The rubber-plastic composite hydrogen filling hose according to claim 1, characterized in that: The thickness of the middle rubber layer is 0.15-0.2mm, and the thickness of the inner lining layer is 0.3-0.8mm.

9. The rubber-plastic composite hydrogen filling hose according to claim 1, characterized in that: The material of the lining layer includes but is not limited to nylon, polyoxymethylene, fluorine-containing polymer or polyester resin.

10. The rubber-plastic composite hydrogen filling hose according to claim 1, characterized in that: The main rubber of the inner rubber layer is nitrile rubber.

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