High pressure resistant rubber tube
By using multiple layers of metal steel wire and synthetic fiber braiding and connecting components in the high-pressure rubber hose, the problem of interlayer separation during bending of traditional rubber hoses is solved, thereby improving the pressure-bearing capacity and overall protective performance of the rubber hose.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG LANTONG ELECTROMECHANICAL CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-07
AI Technical Summary
Traditional high-pressure rubber hoses are prone to separation between layers when bent, especially under high pressure, high temperature and corrosive media conditions, the adhesion is weakened, leading to severe separation between layers.
It adopts a woven layer made of multiple layers of metal steel wire and synthetic fiber, and sets connecting components such as coiled spirals, belt spirals or connecting protrusions between the inner and outer rubber layers and the woven layer to enhance the bonding strength of each layer.
It significantly improves the pressure-bearing capacity and impact toughness of rubber hoses, prevents interlayer peeling under high pressure, and enhances oil resistance, wear resistance, antistatic properties, and weather resistance.
Smart Images
Figure CN224469851U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rubber hose technology, and more specifically to a high-pressure resistant rubber hose. Background Technology
[0002] High-pressure rubber hoses, as an important component widely used in industrial fields, typically consist of an inner rubber layer, a reinforcing layer, and an outer rubber layer. The reinforcing layer is usually made of braided metal mesh or spirally wound steel wire, used to withstand the high pressure of the medium inside the hose. In fields such as oil exploration, engineering machinery, and mining equipment, high-pressure rubber hoses need to transport petroleum-based media (such as mineral oil, hydraulic oil, and fuel oil) and water-based liquids (such as emulsions and oil-water emulsions) at certain pressures and temperatures. These applications place extremely high demands on the high-pressure resistance, durability, and reliability of the rubber hoses.
[0003] A search revealed Chinese patent CN205118478U, which discloses a high-pressure rubber hose comprising an inner tube layer and an outer tube layer, with multiple braided layers between the inner and outer tube layers and a middle rubber layer between adjacent braided layers, thereby improving the high-pressure resistance of the rubber hose.
[0004] However, traditional high-pressure rubber hoses have obvious defects in actual use: when the rubber hose is bent according to the layout of external equipment and joints, separation of the layers is likely to occur. This is mainly because under long-term high pressure, high temperature and media corrosion, the adhesion between the rubber layers will gradually weaken, especially when subjected to pulse pressure or repeated bending, the separation of the layers is more obvious. Utility Model Content
[0005] In order to overcome the above-mentioned defects of the prior art, this utility model provides a high-pressure resistant rubber tube to solve the problem that separation of the layers is easy to occur when the rubber tube is bent according to the layout requirements of external equipment and joints.
[0006] This utility model provides the following technical solution: a high-pressure resistant rubber tube, comprising an inner rubber layer, a braided layer and an outer rubber layer arranged sequentially from the inside to the outside, wherein connecting components are provided both inside and outside the braided layer;
[0007] The braided layer is made of multiple layers of metal steel wire and synthetic fiber, and the braided layer has at least three layers.
[0008] The connecting component is embedded in the outside of the inner rubber layer and the inside of the outer rubber layer. The connecting component is fixedly connected to the braided layer to improve the bonding strength between the braided layer and the inner and outer rubber layers.
[0009] As a further embodiment of this utility model, the connecting component includes an external ring-shaped spiral and an internal ring-shaped spiral, which are respectively located outside and inside the braided layer, and the cross-sections of the external ring-shaped spiral and the internal ring-shaped spiral are circular.
[0010] As a further embodiment of this utility model, the connecting component includes an external belt spiral and an internal belt spiral, the external belt spiral and the internal belt spiral being respectively disposed outside and inside the braided layer, and the cross-section of the external belt spiral and the internal belt spiral being rectangular.
[0011] As a further embodiment of this utility model, the connecting component includes an external connecting protrusion and an internal connecting protrusion. The external connecting protrusion and the internal connecting protrusion are respectively located outside and inside the braided layer. Both the external connecting protrusion and the internal connecting protrusion are spheres and are evenly distributed outside and inside the braided layer.
[0012] As a further embodiment of this utility model, the connecting component is made of a metal or polymer material that has good adhesion to rubber, preferably phosphated steel wire, copper-plated steel wire or modified nylon material.
[0013] As a further embodiment of this utility model, the inner wall of the inner rubber layer is provided with a functional protective coating, which is composed of a wear-resistant layer and an antistatic layer; the main component of the wear-resistant layer is polyurethane elastomer or fluororubber, and the antistatic layer is a conductive material with added conductive carbon black or metal oxide.
[0014] As a further embodiment of this utility model, the outer wall of the outer rubber layer is provided with an environmental erosion resistant coating, which includes at least two of the following: a weather-resistant layer, a wear-resistant layer, and a flame-retardant layer; the weather-resistant layer is composed of chlorosulfonated polyethylene rubber with added ultraviolet absorbers and antioxidants; the wear-resistant layer is a rubber composite material with added ultra-high molecular weight polyethylene or molybdenum disulfide; and the flame-retardant layer is a flame-retardant rubber with added aluminum hydroxide, magnesium hydroxide, or decabromodiphenyl ethane.
[0015] As a further embodiment of this invention, both the inner rubber layer and the outer rubber layer are made of oil-resistant rubber material.
[0016] As a further embodiment of this utility model, the connection method between the connecting component and the braided layer is welding, bonding, or mechanical interlocking structure.
[0017] As a further embodiment of this invention, the surface of the connecting component is provided with a concave-convex structure or through holes to enhance the bonding strength with the rubber material.
[0018] The technical effects and advantages of this utility model are as follows:
[0019] 1. This utility model significantly improves the pressure-bearing capacity and impact resistance of rubber hoses by using a braided layer composed of multiple layers of metal steel wire and synthetic fiber composite weaving.
[0020] 2. This utility model significantly enhances the bonding strength between layers by setting various types of connecting components (such as spiral rings, spiral belts, or connecting protrusions) between the inner and outer rubber layers and the braided layer, effectively preventing failure caused by interlayer peeling under high pressure.
[0021] 3. This utility model further improves the oil resistance, wear resistance, antistatic properties, weather resistance, flame retardancy, and other comprehensive protective performance of the pipe body by optimizing the material formula of the inner and outer rubber layers and adding a functional coating. Attached Figure Description
[0022] Figure 1 This is a cross-sectional structural diagram of the present invention.
[0023] Figure 2 This is a schematic diagram of the woven layer structure of this utility model.
[0024] Figure 3 This is a schematic diagram of the external ring-type spiral and the internal ring-type spiral structure of Embodiment 1 of this utility model.
[0025] Figure 4 This is a schematic diagram of the external belt spiral and the internal belt spiral structure of Embodiment 2 of this utility model.
[0026] Figure 5 This is a schematic diagram of the external connecting protrusion and the internal connecting protrusion in Embodiment 3 of this utility model.
[0027] The attached figures are labeled as follows: 1. Outer rubber layer; 2. Braided layer; 3. Inner rubber layer; 401. External coiled spiral; 402. Internal coiled spiral; 501. External belt spiral; 502. Internal belt spiral; 601. External connecting protrusion; 602. Internal connecting protrusion. Detailed Implementation
[0028] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0029] Reference Figures 1-5 This utility model provides a high-pressure resistant rubber tube, comprising, from the inside out, an inner rubber layer 3, a braided layer 2, and an outer rubber layer 1 (e.g., ...). Figure 1As shown), connecting components are provided both inside and outside the braided layer 2;
[0030] Woven layer 2 is made of multiple layers of metal steel wire and synthetic fibers (such as...) Figure 2 As shown), the number of layers in braided layer 2 is at least three;
[0031] The connecting component is embedded in the outside of the inner rubber layer 3 and the inside of the outer rubber layer 1, and the connecting component is fixedly connected to the braided layer 2.
[0032] Specifically, the connecting component is made of metal or polymer material that has good adhesion to rubber, preferably phosphated steel wire, copper-plated steel wire or modified nylon material. The connection method between the connecting component and the braided layer 2 is welding, bonding or mechanical interlocking structure. The surface of the connecting component is provided with concave and convex structure or through holes to enhance the adhesion strength with rubber material.
[0033] As one embodiment of this utility model (e.g.) Figure 3 As shown), the connecting component includes an outer ring spiral 401 and an inner ring spiral 402. The outer ring spiral 401 and the inner ring spiral 402 are respectively located outside and inside the braided layer 2. The cross-sections of the outer ring spiral 401 and the inner ring spiral 402 are circular.
[0034] As a second embodiment of this utility model (such as...) Figure 4 As shown), the connecting component includes an external belt spiral 501 and an internal belt spiral 502. The external belt spiral 501 and the internal belt spiral 502 are respectively located outside and inside the braided layer 2. The cross-sections of the external belt spiral 501 and the internal belt spiral 502 are rectangular.
[0035] As a third embodiment of this utility model (such as...) Figure 5 As shown, the connecting component includes an external connecting protrusion 601 and an internal connecting protrusion 602. The external connecting protrusion 601 and the internal connecting protrusion 602 are respectively located on the outside and inside of the braided layer 2. Both the external connecting protrusion 601 and the internal connecting protrusion 602 are spheres and are evenly distributed on the outside and inside of the braided layer 2.
[0036] All three embodiments described above aim to improve the bonding strength between the braided layer 2 and the inner rubber layer 3 and the outer rubber layer 1.
[0037] In this invention, both the inner rubber layer 3 and the outer rubber layer 1 are made of oil-resistant rubber material, which is obtained from the following raw materials in parts by weight: 80-100 parts of fluorosilicone rubber, 50-55 parts of polyacrylate, 20-30 parts of aromatic polyester, 2-8 parts of bamboo fiber, 3-9 parts of diethylene glycol, 10-12 parts of vinyltriethoxysilane, and 10-20 parts of hexamethyldisilazane.
[0038] The inner rubber layer 3 is in direct contact with the conveying medium, and its performance directly affects the service life and conveying efficiency of the rubber tube. In order to improve the protective performance of the inner surface, a functional protective coating is provided on the inner wall of the inner rubber layer 3. This protective coating is composed of a wear-resistant layer and an antistatic layer. The main components of the wear-resistant layer are polyurethane elastomer or fluororubber, and the antistatic layer is a conductive material with added conductive carbon black or metal oxide.
[0039] Specifically, the electrostatic layer mainly adds conductive carbon black or metal oxides, which can effectively discharge static electricity and prevent static electricity accumulation from causing danger; the wear-resistant layer uses polyurethane elastomer or fluororubber material, which greatly improves the wear resistance of the inner surface.
[0040] For applications involving the transport of high-temperature media, heat-resistant additives such as antimony trioxide (5-8 parts), decabromodiphenyl ethane (4-5 parts), and calcium hydroxide (5-10 parts) can be added to the inner rubber layer formulation. These additives can significantly improve the heat resistance and thermal stability of the rubber material, enabling the rubber hose to operate for extended periods in high-temperature environments above 120°C without aging.
[0041] A further solution, specifically for conveying corrosive media, utilizes a specially formulated corrosion-resistant rubber for the inner rubber layer, such as chloroprene rubber (60-70 parts) combined with fast-extruded carbon black (15-20 parts) and other additives. This formulation resists the erosion of most acid, alkali, and salt solutions, extending the service life of the rubber hose in chemical environments.
[0042] In this invention, the outer wall of the outer rubber layer 1 is provided with an environmental erosion resistant coating, which includes at least two of the following: a weather-resistant layer, a wear-resistant layer, and a flame-retardant layer; the weather-resistant layer is composed of chlorosulfonated polyethylene rubber with added ultraviolet absorbers and antioxidants; the wear-resistant layer is a rubber composite material with added ultra-high molecular weight polyethylene or molybdenum disulfide; and the flame-retardant layer is a flame-retardant rubber with added aluminum hydroxide, magnesium hydroxide, or decabromodiphenyl ethane.
[0043] Specifically, the outer rubber layer 1, as the outermost layer of the rubber tube, needs to withstand various external damaging factors such as mechanical damage, environmental corrosion, and accidental impact. To this end, this invention provides multiple protective coatings on the outer wall of the outer rubber layer 1, including a weather-resistant layer, a wear-resistant layer, and a flame-retardant layer.
[0044] The weather-resistant layer is mainly composed of chlorosulfonated polyethylene rubber with added ultraviolet absorbers and antioxidants, which can effectively resist ultraviolet radiation and ozone erosion, preventing the rubber material from cracking and becoming brittle due to atmospheric aging. The wear-resistant layer uses a rubber composite material with added ultra-high molecular weight polyethylene or molybdenum disulfide, which significantly improves the wear resistance of the outer surface, enabling the rubber tube to resist frictional damage from external objects.
[0045] The flame-retardant layer is particularly important for rubber hoses used in flammable and explosive environments. This layer is made of flame-retardant rubber with added aluminum hydroxide, magnesium hydroxide or decabromodiphenyl ethane.
[0046] These flame retardants can form a heat insulation layer in the event of a fire, slowing down the burning rate of rubber materials and improving the safety and reliability of equipment.
[0047] The method for preparing rubber hoses includes the following steps:
[0048] S1: The inner rubber tube is prepared by extrusion molding to form the inner rubber layer 3;
[0049] S2: Connecting components are spirally wound around the outer surface of the inner rubber tube;
[0050] S3: A metal and fiber reinforcement layer is woven around the connecting component to form a woven layer 2;
[0051] S4: The connecting component is spirally wound around the outside of the braided layer 2;
[0052] S5: Then extrude and coat to form the outer rubber layer 1;
[0053] S6: Vulcanization and shaping, which firmly bonds the layers together through the vulcanization process.
[0054] For products with special functional coatings, surface treatment is required after vulcanization, such as spraying, dipping, or brushing the functional coating, followed by secondary curing to ensure a strong bond between the coating and the substrate.
[0055] The entire production process requires rigorous quality control and performance testing, including stress testing, pulse testing, separation testing, and various environmental adaptability tests.
[0056] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.
[0057] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.
[0058] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
Claims
1. A high-pressure resistant rubber hose, characterized in that: It includes an inner rubber layer (3), a braided layer (2) and an outer rubber layer (1) arranged sequentially from the inside to the outside. The braided layer (2) has connecting parts both inside and outside. The braided layer (2) is made of multiple layers of metal steel wire and synthetic fiber, and the braided layer (2) has at least three layers. The connecting component is embedded outside the inner rubber layer (3) and inside the outer rubber layer (1), and the connecting component is fixedly connected to the braided layer (2).
2. The high-pressure resistant rubber hose according to claim 1, characterized in that: The connecting component includes an external ring-type spiral (401) and an internal ring-type spiral (402), which are respectively located outside and inside the braided layer (2). The cross-sections of the external ring-type spiral (401) and the internal ring-type spiral (402) are circular.
3. The high-pressure resistant rubber hose according to claim 1, characterized in that: The connecting component includes an external ribbon spiral (501) and an internal ribbon spiral (502), which are respectively located outside and inside the braided layer (2). The cross-sections of the external ribbon spiral (501) and the internal ribbon spiral (502) are rectangular.
4. The high-pressure resistant rubber hose according to claim 1, characterized in that: The connecting component includes an external connecting protrusion (601) and an internal connecting protrusion (602). The external connecting protrusion (601) and the internal connecting protrusion (602) are respectively located on the outside and inside of the braided layer (2). The external connecting protrusion (601) and the internal connecting protrusion (602) are both spheres and are distributed at equal intervals on the outside and inside of the braided layer (2).
5. A high-pressure resistant rubber hose according to claim 1, characterized in that: The connecting component is a polymer material that has good adhesion to rubber.
6. The high-pressure resistant rubber hose according to claim 1, characterized in that: The inner wall of the inner rubber layer (3) is provided with a functional protective coating, which is composed of a wear-resistant layer and an antistatic layer.
7. The high-pressure resistant rubber hose according to claim 1, characterized in that: The outer wall of the outer rubber layer (1) is provided with an environmental erosion resistant coating, which includes at least two of the following layers: a weather-resistant layer, a wear-resistant layer, and a flame-retardant layer.
8. A high-pressure resistant rubber hose according to claim 1, characterized in that: Both the inner rubber layer (3) and the outer rubber layer (1) are made of oil-resistant rubber material.
9. A high-pressure resistant rubber hose according to claim 1, characterized in that: The connection between the connecting component and the braided layer (2) is by bonding.
10. A high-pressure resistant rubber hose according to claim 9, characterized in that: The surface of the connecting component has a concave-convex structure.