Flame-retardant airplane refueling rubber hose

Abstract

The utility model discloses a flame-retardant airplane refueling rubber hose which comprises an inner pipe, a fiber layer, a reinforcing layer and a protective layer are sequentially arranged on the outer wall of the inner pipe from inside to outside, a plurality of hole grooves extending in the length direction of the protective layer are formed in the protective layer, and a flame-retardant layer is arranged between the reinforcing layer and the protective layer. The pipeline has the beneficial effects that the pressure resistance of the pipeline can be improved through the fiber layer and the reinforcing layer, the reliability in a high-pressure environment is ensured, and conveying of aircraft fuel is ensured; the whole protective layer can form an effective heat insulation layer through the hole grooves, the hole grooves reduce the overall weight of the pipeline, materials are more economical and practical, meanwhile, the heat insulation effect is enhanced, and heat conduction is effectively reduced. In addition, the flame-retardant layer is matched with the protective layer, so that the flame-retardant performance of the hose is further improved, the pipeline has excellent flame-retardant capacity, and the risk of fire disasters is reduced.

Description

Technical Field

[0001] The utility model relates to the field of pipelines, and particularly relates to a flame-retardant aircraft refueling rubber hose. Background Art

[0002] The design background of the aircraft refueling rubber hose covers safety, performance and regulatory requirements in aviation refueling operations. Aircraft refueling is a high-risk operation involving a large amount of flammable fuel, so the flame-retardant performance of the hose is crucial. The aircraft refueling rubber hose needs to comprehensively consider safety, performance, regulations and economy to provide reliable guarantee for aircraft refueling operations, thus ensuring flight safety and operation efficiency.

[0003] Since a large amount of flammable fuel is involved in the aircraft refueling process, once the hose leaks, the fuel may quickly spread and contact a fire source, thus triggering a fire or explosion. The existing aircraft refueling hoses generally have a general flame-retardant effect. When the hose leaks or is damaged, the fuel may be more easily ignited, and the speed of flame spread will also increase. Hoses lacking flame-retardant effect may lead to serious safety hazards, increasing the risks and losses in aviation operations. Summary of the Invention

[0004] The purpose of the utility model is to provide a flame-retardant aircraft refueling rubber hose to solve the above problems, as described in detail below.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A flame-retardant aircraft refueling rubber hose provided by the utility model includes an inner tube. A fiber layer, a strengthening layer and a protective layer are sequentially arranged on the outer wall of the inner tube from inside to outside. A plurality of through holes extending along the length direction are arranged on the protective layer. A flame-retardant layer is arranged between the strengthening layer and the protective layer.

[0007] As an alternative of the technical solution of this application document, the fiber layer is wound by multiple layers of fiber materials.

[0008] As an alternative of the technical solution of this application document, the flame-retardant layer is a fluororesin coating with a thickness greater than 1.2 mm.

[0009] As an alternative of the technical solution of this application document, a plurality of strip-shaped grooves are arranged on the outer side of the strengthening layer to assist the adhesion between the flame-retardant layer and the strengthening layer.

[0010] As an alternative of the technical solution of this application document, a plurality of steel wire skeletons distributed in a circumferential direction are arranged in the strengthening layer.

[0011] As an alternative of the technical solution of this application document, an outer sheath is arranged on the outer side of the protective layer.

[0012] As an alternative solution to the technical solution of this application document, the inside of the hole groove is filled with a flame retardant material, and the end of the protective layer is sealed to seal the flame retardant material inside the hole groove.

[0013] As an alternative solution to the technical solution of this application document, the flame retardant material is aluminum hydroxide.

[0014] The beneficial effects are as follows:

[0015] The fiber layer and the reinforcement layer can improve the pressure resistance of the pipeline, ensure reliability in a high-pressure environment, and guarantee the transportation of aircraft fuel.

[0016] The hole groove enables the entire protective layer to form an effective heat insulation layer. The hole groove not only reduces the overall weight of the pipeline, making the material more economical and practical, but also enhances the heat insulation effect and effectively reduces heat conduction.

[0017] The flame retardant layer and the protective layer are used together to further improve the flame retardant performance of the hose, endowing the pipeline with excellent flame retardant ability and reducing the risk of fire.

[0018] In a preferred embodiment, aluminum hydroxide flame retardant material is added to the hole groove, which can greatly improve the flame retardant effect of the pipeline and prevent the spread of flames when the hole groove is damaged by fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a cross-sectional structural schematic diagram of the present invention;

[0021] Figure 2 is a structural schematic diagram of the present invention.

[0022] The descriptions of the reference numerals are as follows:

[0023] 1, inner pipe; 2, fiber layer; 3, reinforcement layer; 301, steel wire skeleton; 302, strip-shaped groove; 4, flame retardant layer; 5, protective layer; 501, hole groove; 6, outer sheath. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope protected by the present utility model.

[0025] First Embodiment:

[0026] As shown in Figure 1 - Figure 2 , the present utility model provides a flame-retardant aircraft refueling rubber hose, which includes an inner tube 1. As the core part, the inner tube 1 bears the direct pressure and chemical erosion of the oil product, ensuring the safe transportation of the oil product. The outer wall of the inner tube 1 is successively provided with a fiber layer 2, a reinforcing layer 3, and a protective layer 5 from inside to outside. The overall strength of 1 and the compressive capacity of the pipeline are improved by the fiber layer 2 and 3; in addition, a plurality of through holes 501 extending along the length direction are provided on the protective layer 5. The number of the through holes 501 is multiple, and they are circumferentially distributed with the axis of the protective layer 5 as the reference, which can form a heat insulation layer. Due to the arrangement of the through holes 501, the overall weight of the pipeline is reduced, which is more economical. At the same time, the heat insulation effect is enhanced, effectively reducing the heat conduction. A flame-retardant layer 4 is provided between the reinforcing layer 3 and the protective layer 5, and the flame-retardant layer 4 further plays a flame-retardant effect.

[0027] In a preferred embodiment, the flame-retardant layer 4 is a fluororesin coating with a thickness greater than 1.2 mm, which can effectively prevent the spread of flames in a high-temperature environment, greatly improving the safety of the oil pipe and having excellent fireproof performance. A plurality of strip-shaped grooves 302 are provided on the outer side of the reinforcing layer 3 to assist the adhesion between the flame-retardant layer 4 and the reinforcing layer 3. The cross section of the strip-shaped groove 302 is arc-shaped and extends along the length direction of the reinforcing layer 3. These grooves not only enhance the adhesion strength between layers but also improve the adhesion between the flame-retardant layer 4 and the reinforcing layer 3, ensuring the structural stability and long-term durability; a plurality of steel wire skeletons 301 distributed in a circle are arranged in the reinforcing layer 3. The steel wire skeletons 301 are distributed in a circle in the reinforcing layer 3, providing excellent compressive capacity and strength for the oil pipe. The design of the steel wire skeletons can evenly distribute the internal and external pressures, preventing the oil pipe from deforming or breaking under high-pressure conditions and ensuring the stable operation of the oil pipe in a harsh environment.

[0028] Second Embodiment, the different features from the first embodiment are as follows:

[0029] An outer sheath 6 is provided outside the protective layer 5. The outer sheath 6 is equipped outside the protective layer 5. The outer sheath 6 not only provides physical protection to prevent damage to the protective layer 5 and the filling material inside it caused by external mechanical damage, but also further improves the overall wear resistance of the oil pipe. The inside of the hole groove 501 is filled with a flame retardant material. The end of the protective layer 5 is sealed to protect the flame retardant material inside the hole groove 501. The sealing of the end of the protective layer 5 ensures the integrity and stability of the aluminum hydroxide flame retardant material. When sealing the end of the protective layer 5, the sealing of the hole groove 501 can be directly achieved through heat-sealing processing to prevent leakage or loss of materials during use. The sealing measure ensures that the flame retardant material in the hole groove 501 is not contaminated by the outside under various environmental conditions, thereby maintaining the long-term effectiveness of its flame retardant performance.

[0030] The hole groove 501 is in an annular fan shape, and the flame retardant material is aluminum hydroxide. Aluminum hydroxide is an excellent flame retardant, and its addition can effectively improve the fire resistance of the oil pipe. When the hole groove 501 is damaged due to a fire, it can prevent the spread of the flame.

[0031] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A flame-retardant aircraft refueling rubber hose, comprising an inner tube (1), characterized in that: The outer wall of the inner tube (1) is sequentially provided with a fiber layer (2), a reinforcing layer (3) and a protective layer (5) from the inside to the outside. A plurality of through holes (501) extending along its length are provided on the protective layer (5). A flame-retardant layer (4) is provided between the reinforcing layer (3) and the protective layer (5).

2. The flame-retardant aircraft refueling rubber hose according to claim 1, wherein: The fiber layer (2) is wound by multiple layers of fiber materials.

3. A flame-retardant aircraft refueling rubber hose according to claim 1, characterized in that: The flame-retardant layer (4) is a fluororesin coating with a thickness greater than 1.2 mm.

4. A flame-retardant aircraft refueling rubber hose according to claim 3, characterized in that: A plurality of strip-shaped grooves (302) are provided on the outer side of the reinforcing layer (3) to assist the adhesion of the flame-retardant layer (4) to the reinforcing layer (3).

5. A flame-retardant aircraft refueling rubber hose according to claim 1 or 3, characterized in that: A plurality of steel wire skeletons (301) distributed in a circular pattern are provided inside the reinforcing layer (3).

6. A flame-retardant aircraft refueling rubber hose according to claim 1, characterized in that: An outer sheath (6) is provided on the outer side of the protective layer (5).

7. The flame-retardant aircraft refueling rubber hose according to claim 6, wherein: The through holes (501) are filled with a flame-retardant material, and the ends of the protective layer (5) are sealed to seal the flame-retardant material inside the through holes (501).

8. A flame-retardant aircraft refueling rubber hose according to claim 7, characterized in that: The flame-retardant material is aluminum hydroxide.

Images