A high pressure hose

Abstract

The invention discloses a high-pressure rubber hose, comprising a pipe body, an outer rubber layer, a middle rubber layer and an inner rubber layer, wherein the pipe body is provided with an outer rubber layer, a middle rubber layer and an inner rubber layer, an inner wall of the inner rubber layer is provided with a heat preservation layer, a guide plate is evenly installed on the inner wall of the heat preservation layer, and the outer side of the inner rubber layer is covered with an inner rubber protective layer, the outer side of the inner rubber protective layer is covered with a middle rubber layer, a rigid layer is provided between the middle rubber layer and the inner rubber protective layer, and the outer side of the rigid layer is covered with a fiber layer, the outer side of the fiber layer is covered with an outer rubber layer, an elastic layer is provided between the outer rubber layer and the fiber layer, and the outer side of the outer rubber layer is covered with a waterproof layer. The invention is provided with a pipe body, an outer rubber layer, a middle rubber layer and an inner rubber layer, and a guide plate is evenly installed on the inner wall of the heat preservation layer, so as to increase the heat preservation effect inside the device, avoid overheating and cracking of the inner rubber layer, and increase the fluid velocity flowing inside the device through the guide plate, so as to facilitate the use of the device.

Description

Technical Field

[0001] The invention relates to the technical field of rubber hoses, in particular to a high-pressure rubber hose. Background Art

[0002] High-pressure hoses are used for conveying petroleum-based and water-based liquids with certain pressure and temperature and liquid transmission pipelines in mine hydraulic supports, oil field development, engineering construction, lifting and transportation, metallurgical forging, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools, and mechanized and automated hydraulic systems in various industrial departments. The inner and outer layers of existing high-pressure hose products are mostly rubber, and the reinforcement layer is mostly a steel wire braided or wound structure, which makes this type of product heavy, easy to rust, and poor fatigue resistance. In addition, the existing hoses have poor rigidity and toughness, are prone to long-term stretching and twisting, and are easily deformed and cracked by external pressure, affecting the use of the device. At the same time, the existing hoses have poor thermal insulation effect and poor waterproofness, and are easily damaged by overheated fluids. The inner rubber layer causes cracks in the inner rubber layer, affecting the use of the device. Summary of the invention

[0003] The object of the present invention is to provide a high-pressure rubber hose to solve the problems of heavy weight, easy corrosion and poor fatigue resistance mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-pressure rubber hose, comprising a pipe body, an outer rubber layer, a middle rubber layer and an inner rubber layer, the pipe body is provided with an outer rubber layer, a middle rubber layer and an inner rubber layer, an inner wall of the inner rubber layer is provided with an insulation layer, a guide plate is evenly installed on the inner wall of the insulation layer, and the outer side of the inner rubber layer is covered with an inner rubber protective layer, the outer side of the inner rubber protective layer is covered with a middle rubber layer, a rigid layer is provided between the middle rubber layer and the inner rubber protective layer, and the outer side of the rigid layer is covered with a fiber layer, the outer side of the fiber layer is covered with an outer rubber layer, an elastic layer is provided between the outer rubber layer and the fiber layer, and the outer side of the outer rubber layer is covered with a waterproof layer, and a reinforcing belt is wrapped on the outer wall of the waterproof layer.

[0005] Furthermore, the reinforcement belt is wound in a spiral shape, and the surface of the waterproof layer is evenly provided with wear-resistant protrusions.

[0006] Furthermore, the elastic layer is evenly provided with air holes inside, and elastic rubber strips are evenly installed inside the elastic layer between two adjacent air holes. The elastic layer and the elastic rubber strips make the tube body form an elastic structure.

[0007] Furthermore, rigid rubber strips are evenly installed inside the rigid layer, and the rigid layer and the rigid rubber strips make the tube body form a reinforced structure.

[0008] Furthermore, the guide plates are arranged in a spiral shape.

[0009] Furthermore, the interior of the fiber layer is woven from multiple aramid fibers, tough fibers are installed at the central position of the aramid fibers, and the outer sides of the tough fibers are alternately wound with first aramid filaments and second aramid filaments in sequence. The tough fibers, first aramid filaments and second aramid filaments make the aramid fibers form a tough structure.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the high-pressure rubber hose is provided with a pipe body, an outer rubber layer, a middle rubber layer and an inner rubber layer; an insulation layer is provided on the inner wall of the inner rubber layer; guide plates are evenly installed on the inner wall of the insulation layer, so as to increase the insulation effect inside the device, avoid overheating and cracking of the inner rubber layer, increase the fluid flow rate inside the device through the guide plates, and facilitate the use of the device; a rigid layer is provided between the middle rubber layer and the inner rubber protective layer; rigid rubber strips are evenly installed inside the rigid layer, so as to increase the rigidity of the device through the rigid rubber strips, increase the compressive capacity of the device, avoid deformation and cracking of the device under pressure, and facilitate the use of the device; the outer side of the rigid layer is wrapped with fiber The fiber layer is woven from a plurality of aramid fibers, and the aramid fibers are woven from tough fibers, a first aramid filament, and a second aramid filament. The first aramid filament and the second aramid filament are used to increase the strength of the device, so as to increase the high temperature resistance, acid and alkali resistance of the device, reduce the weight of the device, increase the insulation effect of the device, and increase the anti-aging effect. An elastic layer is provided between the outer rubber layer and the fiber layer, and elastic rubber strips are evenly installed inside the elastic layer, so as to increase the resilience of the device through the elastic rubber strips, avoid the device from being stretched, twisted, and broken for a long time, and facilitate the use of the device. The outer side of the outer rubber layer of the present invention is wrapped with a waterproof layer, so as to increase the waterproof effect of the device and facilitate the use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the side cross-section structure of the tube body of the present invention;

[0012] Figure 2 It is a schematic diagram of a partial side view of the structure of the tube body of the present invention;

[0013] Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention;

[0014] In the figure: 1. pipe body; 2. reinforcement belt; 3. waterproof layer; 4. outer rubber layer; 5. air holes; 6. elastic layer; 7. elastic rubber strip; 8. fiber layer; 9. middle rubber layer; 10. rigid layer; 11. rigid rubber strip; 12. inner rubber protective layer; 13. inner rubber layer; 14. thermal insulation layer; 15. guide plate; 16. wear-resistant protrusions; 17. tough fiber; 18. aramid fiber; 19. first aramid filament; 20. second aramid filament. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-3, an embodiment of the present invention: a high-pressure rubber hose, comprising a pipe body 1, an outer rubber layer 4, a middle rubber layer 9 and an inner rubber layer 13, the pipe body 1 is provided with an outer rubber layer 4, a middle rubber layer 9 and an inner rubber layer 13, an inner wall of the inner rubber layer 13 is provided with an insulation layer 14, and guide plates 15 are evenly installed on the inner wall of the insulation layer 14, and the guide plates 15 are arranged in a spiral shape, so that the device can increase the flow rate of the fluid inside the device through the guide plates 15, which is convenient for the use of the device, and the outer side of the inner rubber layer 13 is wrapped with an inner rubber protective layer 12, and the outer side of the inner rubber protective layer 12 is wrapped with a middle rubber layer 9, and a rigid layer 10 is provided between the middle rubber layer 9 and the inner rubber protective layer 12, and the inside of the rigid layer 10 is evenly arranged A rigid rubber strip 11 is installed. The rigid layer 10 and the rigid rubber strip 11 make the tube body 1 form a reinforced structure, which is convenient for increasing the rigidity of the device through the rigid rubber strip 11, and increasing the pressure resistance of the device to avoid deformation and cracking of the device under pressure, which is convenient for the use of the device. The outer side of the rigid layer 10 is wrapped with a fiber layer 8, and the inside of the fiber layer 8 is woven by multiple aramid fibers 18. The aramid fibers 18 are surface-modified aramid fibers. The woven structure of the aramid fibers 18 is used as a reinforcement layer to replace steel wire, which can reduce product weight, increase working pressure, enhance fatigue resistance and prevent rust. The improvement of the overall product quality also greatly extends the service life of the hose. A tough fiber 17 is installed at the central position of the aramid fiber 18, and the outer side of the tough fiber 17 is interlaced with the first aramid filament 19 and the second aramid filament 20 in sequence. The tough fiber 17, the first aramid filament 19 and the second aramid filament 20 make the aramid fiber 18 form a tough structure, which is convenient for the device to increase the toughness of the fiber layer 8 through the tough fiber 17, which is convenient for the use of the device. At the same time, the strength of the device is increased by the first aramid filament 19 and the second aramid filament 20, which is convenient for increasing the high temperature resistance, acid and alkali resistance of the device, reducing the weight of the device, increasing the insulation effect of the device, and increasing the anti-aging effect. The outer side of the fiber layer 8 is wrapped with an outer rubber layer 4, and an elastic layer 6 is provided between the outer rubber layer 4 and the fiber layer 8. The inner part of the elastic layer 6 The outer surface of the outer rubber layer 4 is evenly provided with air holes 5, and the inside of the elastic layer 6 between two adjacent air holes 5 is evenly installed with elastic strips 7. The elastic layer 6 and the elastic strips 7 make the tube body 1 constitute an elastic structure, which is convenient for increasing the resilience of the device through the elastic layer 6 and the elastic strips 7, avoiding the device from being stretched, twisted and broken for a long time, and facilitating the use of the device. The outer side of the outer rubber layer 4 is wrapped with a waterproof layer 3, and a reinforcing belt 2 is wound on the outer wall of the waterproof layer 3. The reinforcing belt 2 is spirally wound, and the surface of the waterproof layer 3 is evenly provided with wear-resistant protrusions 16, which is convenient for the reinforcing belt 2 to be wrapped on the outside of the waterproof layer 3, and to increase the strength of the device surface through the reinforcing belt 2, which is convenient for the use of the device. At the same time, the friction of the device surface is increased through the wear-resistant protrusions 16, which is convenient for the use of the device.

[0017] Another technical problem to be solved by the present invention is to provide a method for preparing aramid fiber 18, comprising the following steps:

[0018] 1) The aramid fiber was immersed in acetone for 15 hours and petroleum ether for 15 hours, during which nitrogen was continuously introduced to prevent oxidation; then it was washed with deionized water and dried to obtain clean aramid fiber;

[0019] 2) Prepare graphene oxide by improved Hummer method, add the prepared graphene oxide into aqueous solution, ultrasonically treat for 50 minutes, prepare a 0.01-1 g / L graphene oxide suspension, add a certain amount of ethylenediamine reducing agent, react at 30°C with mechanical stirring for 15 hours, wash and dry, and prepare amino-modified graphene oxide;

[0020] 3) Prepare a dopamine solution with a concentration of 0.5 g / L to 5 g / L using disodium hydrogen phosphate-sodium dihydrogen phosphate buffer, water and dopamine hydrochloride, and adjust the pH of the dopamine solution to 8.6 using potassium hydroxide to obtain dopamine solution A;

[0021] 4) According to the mass ratio of clean aramid fiber to dopamine of 8:1, the clean aramid fiber obtained in step 1 is immersed in dopamine solution A, and shaken at a temperature of 25°C for 6 to 24 hours; after the reaction is completed, the fiber is taken out, washed and dried to obtain dopamine-coated aramid fiber;

[0022] 5) Prepare a Tris-HCl buffer solution with a pH of 8.5, add a certain amount of amino-modified graphene oxide to prepare an amino-modified graphene oxide solution with a concentration of 0.01-1 g / L, add dopamine-coated aramid fiber to the above solution, react at 50-70° C. for 2-10 hours, and after the reaction is completed, take out the fiber, wash and dry it to obtain the surface-modified aramid fiber required by the present invention.

[0023] Using the braided structure of aramid fiber 18 as a reinforcement layer to replace steel wire can reduce product weight, increase working pressure, enhance fatigue resistance and prevent rust. The improvement of the overall quality of the product also greatly extends the service life of the hose.

[0024]

[0025] Working principle: When in use, first connect the device to the required delivery end, so that the required fluid is delivered to the required position through the pipe body 1. During the delivery process, an insulation layer 14 is provided on the inner wall of the inner rubber layer 13, and a guide plate 15 is evenly installed on the inner wall of the insulation layer 14, so as to increase the insulation effect inside the device through the insulation layer 14, avoid overheating and cracking of the inner rubber layer 13, and increase the fluid flow rate inside the device through the guide plate 15, so as to facilitate the use of the device. The rigid rubber strip 11 evenly installed inside the rigid layer 10 can effectively increase the rigidity of the device, avoid deformation and cracking of the device under pressure, and facilitate the use of the device. The tough fiber 17, the first aramid filament 19 and the second aramid filament 20 inside the fiber layer 8 can effectively increase the strength of the device, increase the high temperature resistance, acid and alkali resistance of the device, reduce the weight of the device, increase the insulation effect of the device, and increase the anti-aging effect. The elastic rubber strip 7 is evenly installed inside the elastic layer 6, so as to increase the resilience of the device through the elastic rubber strip 7, avoid long-term stretching, twisting and rupture of the device, and facilitate the use of the device.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-pressure rubber hose, comprising a hose body (1), an outer rubber layer (4), a middle rubber layer (9) and an inner rubber layer (13), characterized in that: The pipe body (1) is provided with an outer rubber layer (4), a middle rubber layer (9) and an inner rubber layer (13); a heat-insulating layer (14) is provided on the inner wall of the inner rubber layer (13); guide plates (15) are evenly installed on the inner wall of the heat-insulating layer (14); the outer side of the inner rubber layer (13) is covered with an inner rubber protective layer (12); the outer side of the inner rubber protective layer (12) is covered with a middle rubber layer (9); a rigid layer (10) is provided between the middle rubber layer (9) and the inner rubber protective layer (12); and the rigid layer (10) is provided between the middle rubber layer (9) and the inner rubber protective layer (12). The outer side of the elastic layer (10) is wrapped with a fiber layer (8), the outer side of the fiber layer (8) is wrapped with an outer rubber layer (4), an elastic layer (6) is provided between the outer rubber layer (4) and the fiber layer (8), and the outer side of the outer rubber layer (4) is wrapped with a waterproof layer (3), the outer side wall of the waterproof layer (3) is wrapped with a reinforcing belt (2), the reinforcing belt (2) is wound in a spiral shape, the surface of the waterproof layer (3) is uniformly provided with wear-resistant protrusions (16), and the inside of the elastic layer (6) is uniformly provided with a waterproof layer (3). The air holes (5) are evenly arranged, and elastic rubber strips (7) are evenly installed inside the elastic layer (6) between two adjacent air holes (5). The elastic layer (6) and the elastic rubber strips (7) make the tube body (1) form an elastic structure. The rigid rubber strips (11) are evenly installed inside the rigid layer (10). The rigid layer (10) and the rigid rubber strips (11) make the tube body (1) form a reinforcement structure. The guide plates (15) are arranged in a spiral shape. The fiber layer (8) is woven from a plurality of aramid fibers (18). Tough fibers (17) are installed at the central position of the aramid fibers (18), and the outer side of the tough fibers (17) is interlaced with first aramid filaments (19) and second aramid filaments (20) in sequence. The tough fibers (17), the first aramid filaments (19) and the second aramid filaments (20) make the aramid fibers (18) form a tough structure. The preparation method of the aramid fibers (18) comprises the following steps: , the aramid fiber was immersed in acetone for 15 hours and petroleum ether for 15 hours, during which nitrogen was continuously introduced to prevent oxidation; then it was washed with deionized water and dried to obtain clean aramid fiber; 2. Graphene oxide is prepared by an improved Hummer method, the prepared graphene oxide is added to an aqueous solution, ultrasonically treated for 50 minutes, and a 0.01-1 g / L graphene oxide suspension is prepared, a certain amount of ethylenediamine reducing agent is added, and the reaction is carried out at 30° C. with mechanical stirring for 15 hours, and then washed and dried to prepare amino-modified graphene oxide; 3) Prepare a dopamine solution with a concentration of 0.5 g / L to 5 g / L using disodium hydrogen phosphate-sodium dihydrogen phosphate buffer, water and dopamine hydrochloride, and adjust the pH of the dopamine solution to 8.6 using potassium hydroxide to obtain dopamine solution A; 4) According to the mass ratio of clean aramid fiber to dopamine of 8:1, the clean aramid fiber obtained in step 1 is immersed in dopamine solution A, and shaken at a temperature of 25°C for 6 to 24 hours; after the reaction is completed, the fiber is taken out, washed and dried to obtain dopamine-coated aramid fiber; 5) Prepare a Tris-HCl buffer solution with a pH of 8.5, add a certain amount of amino-modified graphene oxide to prepare an amino-modified graphene oxide solution with a concentration of 0.01-1 g / L, add dopamine-coated aramid fiber to the above solution, react at 50-70°C for 2-10 hours, and after the reaction is completed, take out the fiber, wash and dry it to obtain the desired surface-modified aramid fiber.

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