High pressure resistant braided hose

Abstract

The utility model relates to the technical field of preparation rubber pipe, especially a high pressure resistant braided rubber pipe, including the inner rubber layer, the outer wall of inner rubber layer is provided with the first reinforcing layer, the outer wall of first reinforcing layer is provided with the intermediate rubber layer. The utility model has the advantages that: the second reinforcing layer can improve the high pressure resistance of the whole, be used for the transmission of high pressure medium, and the first reinforcing layer comprises a first rubber layer, a fiber braid layer and a second rubber layer, so that a flow channel is formed between the first reinforcing layer and the inner rubber layer. When the inner rubber layer is damaged, the first reinforcing layer can effectively block the transmission medium and form a double-layer protection with the intermediate rubber layer, preventing the medium from entering the steel wire mesh layer. The fiber braid layer can bind the inner rubber layer, preventing large-size damage of the inner rubber layer. The high pressure medium can be conveniently transported, and the overall service life of the braided rubber pipe is improved, thereby effectively solving the problems in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of braided hose technology, and in particular to a high-pressure resistant braided hose. Background Technology

[0002] Rubber hoses are flexible tubular conveying devices made primarily of rubber or synthetic materials through a multi-layered composite structure. They are used in engineering machinery, hydraulic systems of mining equipment, energy extraction and transportation, chemical and metallurgical applications, and other scenarios. Traditional braided rubber hoses, which only add steel wire winding inside the rubber layer, suffer from cavitation and wire pulling when the conveyed medium contains a lot of impurities. Over time, the inner rubber layer cracks, allowing the conveyed medium to enter the gaps between the steel wire layers, leading to steel wire corrosion. Based on this, a high-pressure resistant braided rubber hose is proposed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-pressure resistant braided hose, which effectively solves the deficiencies of the prior art.

[0004] To achieve the above objectives, one embodiment of the present invention provides a high-pressure resistant braided hose, comprising an inner rubber layer, a first reinforcing layer disposed on the outer wall of the inner rubber layer, an intermediate rubber layer disposed on the outer wall of the first reinforcing layer, a second reinforcing layer disposed on the outer wall of the intermediate rubber layer, an outer rubber layer disposed on the outer wall of the second reinforcing layer, and an outer protective layer wound around the outer wall of the outer rubber layer. The first reinforcing layer comprises a first rubber layer, a fiber braiding layer, and a second rubber layer. The second reinforcing layer comprises a first fabric layer, a steel wire braided mesh layer, and a second fabric layer. The first fabric layer covers the outer wall of the intermediate rubber layer, and the steel wire braided mesh layer is located on the outer wall of the first fabric layer.

[0005] Preferably, in any of the above embodiments, the inner rubber layer is made of synthetic rubber, and its thickness is 0.5-5.0 mm. This embodiment facilitates the formation of a media transport channel, ensuring safe and stable transport of the media. The material of the inner rubber layer is selected based on the specific application scenario.

[0006] General-purpose materials: The inner rubber layer of ordinary rubber hoses is mostly made of natural rubber or synthetic rubber (such as nitrile rubber), which is suitable for conveying non-corrosive media such as water and air.

[0007] Special functional materials

[0008] Oil-resistant type: Made of nitrile butadiene rubber (NBR) or hydrogenated nitrile butadiene rubber (HNBR), it can withstand long-term immersion in petroleum-based media;

[0009] High temperature resistant type: using fluororubber (FKM) or silicone rubber, the temperature range can reach -50℃ to +170℃, suitable for steam or high temperature fluid transportation;

[0010] Acid and alkali resistant type: EPDM rubber or chloroprene rubber (CR) is selected to resist corrosion from acid and alkali solutions with pH≤12.

[0011] Preferably, in any of the above embodiments, the fiber braided layer is arranged on the outer wall of the first adhesive layer in a spiral winding manner with multiple fibers, and gaps are left between the multiple fibers. The second adhesive layer is vulcanized and bonded to the first adhesive layer through the gaps between the fibers. The thickness of the first reinforcing layer is 1.5-3.0 mm. By using this method, the fiber braided layer can stably support the inner adhesive layer, acting as a transition layer. At the same time, it is used to balance radial strength and axial stability, improve compressive strength and deformation resistance, and facilitate stable support for the inner adhesive layer. In addition, after the inner adhesive layer is damaged, the first reinforcing layer can also transport the medium and prevent the medium from entering the steel wire braided mesh layer.

[0012] Preferably, in any of the above embodiments, the thickness of both the intermediate and outer rubber layers is 2.0-4.5 mm, and both are made of synthetic rubber. In this embodiment, the intermediate and outer rubber layers are typically made of weather-resistant and wear-resistant synthetic rubber (such as nitrile rubber or neoprene rubber). High-pressure hoses reinforced with steel wire braiding or winding have an outer rubber layer thickness of 3.0–4.5 mm to improve pressure resistance and wear resistance. High-temperature resistant hoses typically have an outer layer thickness of 2.0–3.5 mm to balance flexibility and heat resistance. Wear-resistant hoses can have an outer rubber layer thickness increased to 3.0–4.0 mm to extend service life. Tear strength must be ≥15 kN / m, and Akron abrasion loss ≤0.5 cm. 3 / 1.61km, ensuring wear resistance and resistance to mechanical damage; the outer layer of the oil-resistant hose must pass the ASTM No.3 oil immersion test (volume change rate ≤10%).

[0013] Preferably, as described in any of the above embodiments, the outer protective layer comprises a third adhesive layer, a canvas layer, and a fourth adhesive layer. The third adhesive layer is vulcanized and bonded to the outer adhesive layer. This method facilitates the formation of a protective structure on the outer wall of the outer adhesive layer. The outer protective layer is spirally wound and evenly wound onto the outer wall of the outer adhesive layer. The canvas layer in the outer protective layer is made of synthetic fiber canvas, which has high strength and wear resistance, making it suitable for general industrial environments. Alternatively, synthetic fiber fabrics, such as polyester or aramid fibers, can be used, offering higher tensile strength and chemical corrosion resistance, making them suitable for harsh working conditions (such as high temperatures and corrosive media). An impregnation process enhances the bonding force with the third and fourth adhesive layers, preventing interlayer delamination. Simultaneously, the outer protective layer improves the strength and wear resistance of the braided hose, facilitating use in harsh environments.

[0014] This utility model has the following advantages:

[0015] This high-pressure resistant braided hose comprises an inner rubber layer, a first reinforcing layer, an intermediate rubber layer, a second reinforcing layer, an outer rubber layer, and an outer protective layer, forming a braided hose structure. The second reinforcing layer improves the overall high-pressure resistance for transmitting high-pressure media. The first reinforcing layer, including a first rubber layer, a fiber braiding layer, and a second rubber layer, forms a flow channel with the inner rubber layer. When damage occurs inside the inner rubber layer, the first reinforcing layer effectively blocks the transported medium and forms a double-layer protection with the intermediate rubber layer, preventing the medium from entering the steel wire braided mesh layer. The fiber braiding layer effectively binds the inner rubber layer, preventing large-scale damage and facilitating the transport of high-pressure media. This also improves the overall lifespan of the braided hose, effectively solving the problems existing in the prior art. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the first reinforcing layer of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the second reinforcing layer of this utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the outer protective layer of this utility model.

[0021] In the diagram: 1-Inner adhesive layer, 2-First reinforcing layer, 201-First adhesive layer, 202-Fiber braided layer, 203-Second adhesive layer, 3-Intermediate adhesive layer, 4-Second reinforcing layer, 401-First fabric layer, 402-Steel wire braided mesh layer, 403-Second fabric layer, 5-Outer adhesive layer, 6-Outer protective layer, 601-Third adhesive layer, 602-Canvas layer, 603-Fourth adhesive layer, 7-Connecting male connector. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0023] like Figures 1 to 5As shown, a high-pressure resistant braided hose includes an inner rubber layer 1, a first reinforcing layer 2 on the outer wall of the inner rubber layer 1, an intermediate rubber layer 3 on the outer wall of the first reinforcing layer 2, a second reinforcing layer 4 on the outer wall of the intermediate rubber layer 3, an outer rubber layer 5 on the outer wall of the second reinforcing layer 4, and an outer protective layer 6 wound around the outer wall of the outer rubber layer 5. The first reinforcing layer 2 includes a first rubber layer 201, a fiber braided layer 202, and a second rubber layer 203. The second reinforcing layer 4 includes a first fabric layer 401, a steel wire braided mesh layer 402, and a second fabric layer 403. The first fabric layer 401 covers the outer wall of the intermediate rubber layer 3, and the steel wire braided mesh layer 402 is located on the outer wall of the first fabric layer 401. A connecting male head 7 is installed at both ends of the inner rubber layer 1, the first reinforcing layer 2, the intermediate rubber layer 3, the second reinforcing layer 4, the outer rubber layer 5, and the outer protective layer 401. A connecting nut is rotatably installed at the end of the connecting male head 7.

[0024] Example 1: The inner rubber layer 1 is made of synthetic rubber, and its thickness is 0.5-5.0 mm. The inner rubber layer 1 facilitates the formation of a media conveying channel, ensuring the safe and stable conveying of the media. The material of the inner rubber layer 1 is selected according to different application scenarios.

[0025] General-purpose materials: The inner rubber layer of ordinary rubber hoses is mostly made of natural rubber or synthetic rubber (such as nitrile rubber), which is suitable for conveying non-corrosive media such as water and air.

[0026] Special functional materials

[0027] Oil-resistant type: Made of nitrile butadiene rubber (NBR) or hydrogenated nitrile butadiene rubber (HNBR), it can withstand long-term immersion in petroleum-based media;

[0028] High temperature resistant type: using fluororubber (FKM) or silicone rubber, the temperature range can reach -50℃ to +170℃, suitable for steam or high temperature fluid transportation;

[0029] Acid and alkali resistant type: EPDM rubber or chloroprene rubber (CR) is selected to resist corrosion from acid and alkali solutions with pH≤12.

[0030] Thickness range

[0031] Standard hoses: The standard inner rubber layer thickness is 0.5–1.5 mm, suitable for low-pressure (such as water and air) applications;

[0032] For high-flow-rate hoses used in reservoir drainage and other applications, the inner rubber layer can be thickened to 3.0–5.0 mm to improve wear resistance.

[0033] High-pressure hoses: Steel wire reinforced high-pressure hoses (such as hydraulic hoses) typically have an inner rubber layer thickness of 1.5–3.0 mm, balancing pressure resistance and flexibility;

[0034] Under ultra-high pressure environments (such as above 55 MPa), the inner rubber layer needs to be increased to 3.0–4.0 mm and reinforced with multi-layer steel wire braiding.

[0035] Special purpose hoses: The inner rubber layer thickness of oil-resistant hoses is generally 2.0–3.0 mm to ensure sealing performance and media compatibility;

[0036] High-temperature resistant steam hoses delay heat penetration and protect the reinforcing layer structure by increasing the thickness of the inner rubber layer (e.g., 3.0–4.5 mm).

[0037] The fiber braided layer 202 is arranged on the outer wall of the first adhesive layer 201 by spiral winding multiple fibers, with gaps between the fibers. The second adhesive layer 203 is vulcanized and bonded to the first adhesive layer 201 through the gaps between the fibers. The thickness of the first reinforcing layer 2 is 1.5-3.0mm. As an optional technical solution of this utility model, this facilitates the fiber braided layer 202 to stably support the inner adhesive layer 1, acting as a transition layer. At the same time, it is used to balance radial strength and axial stability, improve compressive strength and deformation resistance, and facilitates stable support for the inner adhesive layer 1. In addition, after the inner adhesive layer 1 is damaged, the first reinforcing layer 2 can also transport the medium and prevent the medium from entering the steel wire braided mesh layer 402.

[0038] The thickness of both the intermediate rubber layer 3 and the outer rubber layer 5 is 2.0-4.5mm, and both are made of synthetic rubber. As an optional technical solution of this utility model, the intermediate rubber layer 3 and the outer rubber layer 5 are often made of weather-resistant and wear-resistant synthetic rubber (such as nitrile rubber and neoprene rubber). For high-pressure hoses reinforced with steel wire braiding or winding, the outer rubber layer thickness can reach 3.0–4.5mm to improve pressure resistance and wear resistance. The outer layer thickness of high-temperature resistant hoses is typically 2.0–3.5mm, balancing flexibility and heat resistance. For wear-resistant hoses, the outer rubber layer can be thickened to 3.0–4.0mm to extend service life. The tear strength must be ≥15kN / m, and the Akron abrasion loss ≤0.5cm. 3 / 1.61km, ensuring wear resistance and resistance to mechanical damage; the outer layer of the oil-resistant hose must pass the ASTM No.3 oil immersion test (volume change rate ≤10%).

[0039] The outer protective layer 6 includes a third adhesive layer 601, a canvas layer 602, and a fourth adhesive layer 603. The third adhesive layer 601 is vulcanized and bonded to the outer adhesive layer 5. As an optional technical solution of this utility model, this facilitates the formation of a protective structure on the outer wall of the outer adhesive layer 5. The outer protective layer 6 is spirally wound and evenly wound on the outer wall of the outer adhesive layer 5. The canvas layer in the outer protective layer 6 is made of synthetic fiber canvas, which has high strength and wear resistance, and is suitable for general industrial environments. Using synthetic fiber cloth, such as polyester fiber or aramid fiber, has higher tensile strength and chemical corrosion resistance, and is suitable for harsh working conditions (such as high temperature and corrosive media). The bonding force with the third adhesive layer 601 and the fourth adhesive layer 603 is enhanced through an impregnation process to prevent interlayer delamination. At the same time, the outer protective layer 6 improves the strength and wear resistance of the braided hose, making it easy to use in harsh environments.

[0040] In summary, when used by the user, a braided hose structure is formed by setting an inner rubber layer 1, a first reinforcing layer 2, an intermediate rubber layer 3, a second reinforcing layer 4, an outer rubber layer 5, and an outer protective layer 6. The second reinforcing layer 4 can improve the overall high-pressure resistance performance for the transmission of high-pressure media. At the same time, the first reinforcing layer 2 includes a first rubber layer 201, a fiber braided layer 202, and a second rubber layer 203, which together with the inner rubber layer 1 form a flow channel. When the inner rubber layer 1 is damaged, the first reinforcing layer 2 can effectively block the transported medium and form a double layer of protection with the intermediate rubber layer 3 to prevent the medium from entering the steel wire braided mesh layer 402. The fiber braided layer 202 can easily bind the inner rubber layer 1, preventing large-sized damage to the inner rubber layer 1, facilitating the transmission of high-pressure media, and improving the overall lifespan of the braided hose, thereby effectively solving the problems existing in the prior art.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure resistant braided hose, characterized in that: The system includes an inner adhesive layer (1), a first reinforcing layer (2) on the outer wall of the inner adhesive layer (1), an intermediate adhesive layer (3) on the outer wall of the first reinforcing layer (2), a second reinforcing layer (4) on the outer wall of the intermediate adhesive layer (3), an outer adhesive layer (5) on the outer wall of the second reinforcing layer (4), and an outer protective layer (6) wrapped around the outer wall of the outer adhesive layer (5). The first reinforcing layer (2) includes a first adhesive layer (201), a fiber braided layer (202), and a second adhesive layer (203). The second reinforcing layer (4) includes a first fabric layer (401), a steel wire braided mesh layer (402), and a second fabric layer (403). The first fabric layer (401) covers the outer wall of the intermediate adhesive layer (3), and the steel wire braided mesh layer (402) is located on the outer wall of the first fabric layer (401).

2. The high-pressure resistant braided hose according to claim 1, characterized in that: The inner rubber layer (1) is made of synthetic rubber and has a thickness of 0.5-5.0 mm.

3. The high-pressure resistant braided hose according to claim 2, characterized in that: The fiber braided layer (202) is arranged on the outer wall of the first adhesive layer (201) in a spiral winding manner with multiple fibers, and gaps are left between the multiple fibers. The second adhesive layer (203) is vulcanized and bonded to the first adhesive layer (201) through the gaps between the fibers. The thickness of the first reinforcing layer (2) is 1.5-3.0 mm.

4. The high-pressure resistant braided hose according to claim 3, characterized in that: The thickness of the intermediate rubber layer (3) and the outer rubber layer (5) is 2.0-4.5 mm, and the material of the intermediate rubber layer (3) and the outer rubber layer (5) is synthetic rubber.

5. The high-pressure resistant braided hose according to claim 4, characterized in that: The outer protective layer (6) includes a third adhesive layer (601), a canvas layer (602) and a fourth adhesive layer (603), wherein the third adhesive layer (601) is vulcanized and bonded to the outer adhesive layer (5).

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