A hose
The hose design with aramid and steel wire braided layers addresses the challenge of flexibility and weight in hydraulic hoses, enhancing softness and reducing weight while maintaining pressure resistance and extending service life.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CONTITECH (SHANDONG) ENGINEERED RUBBER PRODUCT CO LTD
- Filing Date
- 2026-01-16
- Publication Date
- 2026-07-23
AI Technical Summary
Hydraulic hoses with double-layer braided steel wire reinforcement struggle to meet the requirements of small space installations due to high hardness and large bending radii, failing to balance flexibility, weight, and pressure resistance.
A hose design incorporating aramid and steel wire braided layers as reinforcement, with aramid used as one layer to enhance flexibility and reduce weight while maintaining pressure resistance, and chemical bonding to improve adhesion between layers.
The hose achieves doubled softness and reduced weight, ensuring compatibility with small space installations and prolonged service life through balanced stress distribution and improved adhesion.
Smart Images

Figure CN2026073142_23072026_PF_FP_ABST
Abstract
Description
A hose
[0001] Technical field
[0002] The invention relates to the field of mechanical engineering technology, especially to a hose.
[0003] Background technology
[0004] With the further improvement of the lightweight requirements of construction machinery, the layout space of hydraulic system pipelines on construction machinery is also getting smaller and smaller, which requires hydraulic hoses to have better soft bending performance and smaller bending radii. At the same time, the hydraulic hose is required to weigh less than the meter. At present, the double-layer braided hydraulic hose is braided with two layers of copper-plated steel wire as a reinforcement layer in order to meet a certain pressure requirement, due to the hardness of the steel wire, the hose cannot be made very soft, and the bending radius of the hose is also relatively large, which cannot meet the installation requirements of some small space hydraulic pipelines and the overall lightweight needs of the equipment. At this stage, in order to improve the softness of hydraulic double-layer braided hoses as much as possible, the inner rubber layer with lower hardness is often used, or the flexibility of the hose is improved by changing the braided structure of the steel wire. However, simply reducing the hardness of the hose, increasing the elasticity of the compound, and changing the structure of the wire braid layer sometimes cannot meet these high requirements.
[0005] Invention content
[0006] The purpose of the invention is to solve how to further improve the flexibility of the hose to meet the installation requirements of a small space hydraulic pipeline under the premise of meeting the pressure requirements. The invention provides a hose that can double the softness of the hose under the premise of meeting the pressure requirements of the hose, so as to meet the installation requirements of some small space hydraulic pipelines.
[0007] In order to solve the above technical problems, the embodiment of the invention discloses a hose, comprising: along the radial direction of the hose, the inner lining layer, the first reinforcement layer, the middle rubber layer, the second reinforcement layer and the outer covering layer are arranged sequentially from the inside to the outside; wherein, the first reinforcing layer is an aramid braided layer, and the second reinforcement layer is a steel wire braided layer; Or, the first reinforcing layer is a steel wire braided layer, and the second reinforcement layer is an aramid braided layer.
[0008] Using the above technical scheme, aramid is a synthetic long-chain polymer fiber with the characteristics of stiffness, high modulus, low elongation, and high temperature stability. It has high strength and good flexibility and uses aramid braid as one of the reinforcing layers to match it with the steel wire braid of another reinforcement layer, which together serves as the pressure bearing layer of the hose. Compared with the embodiment in which both reinforcement layers are made of aramid braided layer, the present embodiment can ensure the stiffness and negative pressure resistance requirements of the hose at the same time. Compared with the steel wire braided layer of both reinforcement layers, the present embodiment can double the softness of the hose while ensuring the strength and pressure requirements of the hose, so as to meet the installation requirements of some small space hydraulic pipelines.
[0009] In addition, the quality of the aramid braid layer is much lower than the weight of the steel wire braid, and compared with the embodiment of the two reinforcement layers are steel wire braided layers, the aramid braid layer used in this application as one of the reinforcement layers can reduce the mass of the hose, so as to meet the lightweight requirements of the overall equipment.
[0010] In some possible embodiments, the inner lining layer, the first reinforcement layer, the middle adhesive layer, the second reinforcement layer and the outer covering layer are bonded in turn.
[0011] In some possible embodiments, when the first reinforcing layer is an aramid braid, the aramid braiding layer covers the lining layer by 85%~95%, and a part of the lining layer exposes the aramid braid layer to bond with the medium adhesive layer.
[0012] Using the above technical scheme, the aramid braid layer as the first reinforcement layer is woven to the inner lining layer by weaving, and there are some voids in the braided aramid braid layer, through which the lining layer is exposed and faces the middle adhesive layer, so as to bond with the middle adhesive layer. At the same time, the upper and lower surfaces of the part covering the lining layer of the aramid braid layer are bonded to the middle rubber layer and the inner lining layer at the same time, so that the adhesion between the middle rubber layer, the inner lining layer and the aramid braid layer of the hose is stronger.
[0013] In some possible embodiments, when the second reinforcing layer is an aramid braid, the aramid weaving layer covers the adhesive layer by 85%~95%, and a part of the adhesive layer exposes the aramid braid layer to bond with the outer covering layer.
[0014] Using the above technical scheme, the aramid braid layer as the second reinforcing layer is woven to the medium rubber layer by weaving, and there are some gaps in the aramid braid layer of the weaving molding, through which the middle rubber layer is exposed and faces the outer layer, so as to bond with the outer covering. At the same time, the upper and lower surfaces of the part covering the middle rubber layer of the aramid braid layer are bonded with the outer layer and the middle rubber layer at the same time, so that the adhesion between the middle rubber layer, the outer layer and the aramid braid layer of the hose is stronger.
[0015] In some possible embodiments, the material of the aramid braid layer is para-aramid; The material of the steel wire braid layer is copper-plated steel wire.
[0016] Using the above technical scheme, para-aramid has better strength than other aramids, which can ensure the strength requirements of the hose.
[0017] When the second reinforcement layer is the wire braided layer, the sulfur of the rubber in the middle and outer coating will react chemically with the copper on the surface of the copper-plated steel wire to form compounds such as cuprous sulfide (Cu2S) . This chemical bonding is much stronger than the simple physical adsorption, so that the rubber can be firmly attached to the surface of the steel wire, so that the bond between the wire braid layer and the middle rubber layer and the outer cladding layer are more firm, and the overall performance of the hose is improved.
[0018] When the first reinforcement layer is the braided steel wire, the sulfur of the rubber layer and the inner lining layer will chemically react with the copper on the surface of the copper-plated steel wire to form compounds such as cuprous sulfide (Cu2S) . This chemical bonding is much stronger than the simple physical adsorption, so that the rubber can be firmly attached to the surface of the steel wire, so that the bond between the wire braid layer and the middle rubber layer and the lining layer is more firm, and the overall performance of the hose is improved.
[0019] In some possible embodiments, the density of the para-aramid is 1.43 g / cm3 to 1.45g / cm3, the tensile strength is 2900Mpa to 3500Mpa, and the elongation rate after breaking is 1.5%to 2.5%.
[0020] In some possible embodiments, the para-aramid is treated with resorcinol-formaldehyde-latex dipping.
[0021] Using the above technical scheme, the dipping treatment of para-aramid can form a film on the surface of para-aramid, significantly improve its bonding strength with rubber materials, so that the two can work better together and give full play to the enhancing effect of para-aramid.
[0022] In some possible embodiments, the coverage rate of the steel wire braid layer to the inner lining layer or the medium adhesive layer is 90%to 100%.
[0023] The above technical scheme is used to ensure that the coverage rate of the steel wire braid layer to the inner lining layer or medium rubber layer is more than 90%, so as to achieve better strength of the hose and meet the pressure of product demand.
[0024] In some possible embodiments, the weaving angle of the first reinforcement layer is 53.7° to 54.7°, and the weaving angle of the second reinforcement layer is 54.7° to 55.7°Using the above technical scheme, 54.7° is considered to be a theoretical equilibrium angle in the design of the braided reinforcement layer of the hose. When the hose is subjected to internal pressure, at this angle, the axial stress and circumferential stress of the hose can achieve a good balance, so that the hose has a strong bearing capacity, reduces the damage caused by local stress concentration, and prolongs the service life of the hose. The braiding angle of the first reinforcement layer and the second reinforcement layer is slightly offset from the balance angle by 54.7°, and the braiding angle of the first reinforcement layer and the second reinforcement layer are located on both sides of the equilibrium angle respectively, when the hose is subjected to internal pressure, the first reinforcement layer and the second reinforcement layer can work together to make the stress distribution more uniform and jointly bear the load, so as to improve the overall bearing capacity of the hose, reduce the damage caused by local stress concentration, and extend the service life of the hose.
[0025] In some possible embodiments, the material of the inner lining layer is nitrile rubber or neoprene, the material of the outer covering layer is neoprene, and the middle rubber layer is made of a mixture of adhesive, neoprene and nitrile rubber.
[0026] Using the above technical solution, the material of the lining layer is nitrile rubber or neoprene, which can meet the oil, temperature and sealing requirements of the hose. The material of the outer coating is neoprene, which has the characteristics of aging resistance, ozone resistance, temperature resistance, etc., and can play a role in protecting the second reinforcement layer. The medium rubber layer plays a role in bonding between the aramid braid layer and the steel wire braid layer, and cushions the friction between the two layers when the hose is stressed.
[0027] FIG. 1 shows a schematic diagram of the structure of the hose of the embodiment of the present invention.
[0028] Specific embodiment
[0029] The following is a specific embodiment illustrating the embodiment of the present invention, and a person skilled in the field can easily understand the other advantages and effects of the present invention from the contents revealed in the present specification. Although the description of the present invention will be introduced together with better embodiments, this does not mean that the characteristics of the invention are limited to the embodiment. On the contrary, the purpose of introducing a invention in combination with the embodiment is to cover other options or modifications that may be extended based on the claims of the invention. In order to provide an in-depth understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without these details. In addition, to avoid confusion or obscurity of the focus of the present invention, some specific details will be omitted from the description. It should be noted that the embodiments in the present invention and the features in the embodiments can be combined with each other without conflict.
[0030] It should be noted that in this specification, similar designations and letters indicate similar items in the drawings below, so once an item is defined in a drawing, it does not need to be further defined and explained in subsequent drawings.
[0031] In the description of the present embodiment, it should be explained that the orientation or position relationship indicated by the terms "upper" , "down" , "inner" , "bottom" , etc. is based on the orientation or position relationship shown in the attached drawing, or the orientation or position relationship usually placed when the invention product is used, only to facilitate the description of the invention and simplify the description, rather than to indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and operate in a specific orientation. Therefore, it cannot be understood as a restriction on the present invention.
[0032] The terms "first" , "second" , etc. are only used to distinguish descriptions and cannot be understood to indicate or imply relative importance.
[0033] In the description of the present embodiment, it should also be noted that, unless otherwise expressly stipulated and qualified, the terms "set" , "connected" , "connected" should be broadly understood, for example, it may be a fixed connection, a detachable connection, or a one-piece connection; It can be mechanically or electrically connected; It can be directly connected or indirectly through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meaning of the above terms in this embodiment can be understood on a case-by-case basis.
[0034] In order to make the purpose, technical scheme and advantages of the present invention clearer, the embodiment of the present invention will be further described in detail in combination with the attached drawings.
[0035] Referring to FIG. 1, the embodiment of the present application provides a hose 100, along the radial X of the hose 100, and the hose 100 comprises an inner lining layer 200, a first reinforcement layer 300, a middle rubber layer 400, a second reinforcement layer 500 and an outer cladding layer 600 arranged sequentially from the inside to the outside; Among them, the first reinforcement layer 300 is aramid braided layer, and the second reinforcement layer 500 is steel wire braided layer; Alternatively, the first reinforcement layer 300 is the steel wire braid, and the second reinforcement layer 500 is the aramid braid. That is, the hose 100 of the present embodiment has two reinforcing layers, namely the steel wire braid layer and the aramid braid layer, as for which is the first reinforcement layer 300 and which is the second reinforcement layer 500, there are two embodiments, that is, the first reinforcement layer 300 is the aramid braided layer, and the second reinforcement layer 500 is the steel wire braided layer; Alternatively, the first reinforcement layer 300 is the steel wire braid, and the second reinforcement layer 500 is the aramid braid.
[0036] Using the above technical scheme, aramid is a synthetic long-chain polymer fiber with the characteristics of stiffness, high modulus, low elongation, and high temperature stability. It has high strength and good flexibility and uses aramid braid as one of the reinforcing layers, so that it and the steel wire braid of another reinforcement layer are matched, and the two together serve as the pressure bearing layer of hose 100. Compared with the embodiment in which both reinforcement layers are made of aramid braided layer, the present embodiment can ensure the stiffness and negative pressure resistance requirements of the hose 100 at the same time. Compared with the steel wire braided layer of both reinforcement layers, the present embodiment can double the softness of the hose 100 while ensuring the strength and pressure requirements of the hose 100, so as to meet the installation requirements of some small space hydraulic pipelines.
[0037] In addition, the mass of the aramid braid layer is much lower than the weight of the steel wire braid, and compared with the embodiment of the two reinforcement layers are steel wire braided layers, the aramid braid layer used in this application as one of the reinforcement layers can reduce the mass of the hose 100, so as to meet the overall lightweight requirements of the equipment.
[0038] It should be noted that FIG. 1 is convenient to show the structure of each layer of hose 100, and the structure of each layer that was originally hidden inside is intuitively displayed by truncation, so that the relative positions of the inner lining layer 200, the first reinforcement layer 300, the middle rubber layer 400, the second reinforcement layer 500 and the outer covering layer 600 can be clearly seen. But it is understandable that the layers of the actual hose 100 are a continuous whole, and each layer forms a complete cylindrical structure around the axis of the hose 100, extending from one end of the hose 100 to the other.
[0039] Among some possible embodiments, the inner lining layer 200, the first reinforcement layer 300, the medium rubber layer 400, the second reinforcement layer 500 and the outer cladding layer 600 are bonded in turn.
[0040] In some possible embodiments, when the first reinforcement layer 300 is an aramid braid, the aramid braid covers the lining layer 200 by 85%to 95%, and a part of the lining layer 200 exposes the aramid braid layer to bond with the medium rubber layer 400. For example, the coverage of aramid braid layer to lining layer 200 is 85%, 87%, 89%, 91%, 93%, 95%, etc.
[0041] In the present embodiment, the aramid braid layer is woven to the inner lining layer 200 by weaving, and there are some voids in the woven aramid braid layer, through which the inner lining layer 200 is exposed and faces the medium rubber layer 400, so as to bond with the medium rubber layer 400. At the same time, the upper and lower surfaces of the part covering the lining layer 200 of the aramid braid layer are bonded with the middle rubber layer 400 and the lining layer 200 at the same time, so that the adhesion between the medium rubber layer 400, the lining layer 200 and the aramid braid layer of the hose 100 is stronger.
[0042] In another embodiment, when the second reinforcement layer 500 is an aramid braid, the aramid braid layer covers the medium rubber layer 400 by 85%to 95%, and a part of the medium rubber layer 400 exposes the aramid braid layer to bond with the outer cladding layer 600. For example, the coverage rate of aramid braid layer to medium rubber layer 400 is 85%, 87%, 89%, 91%, 93%, 95%, etc.
[0043] In the present embodiment, the aramid braid layer is woven to the medium rubber layer 400 by weaving, and there are some gaps in the braided aramid braid layer, through which the middle rubber layer 400 is exposed and faces the outer layer 600, so as to bond with the outer layer 600. At the same time, the upper and lower surfaces of the part covering the medium layer 400 of the aramid braid layer are bonded with the outer layer 600 and the medium layer 400 at the same time, so that the adhesion between the medium layer 400, the outer layer 600 and the aramid braid layer of the hose 100 is stronger.
[0044] In the present embodiment, the material of the inner lining layer 200 is nitrile butadiene rubber or neoprene, which can meet the oil resistance and temperature resistance and sealing requirements of the hose 100.
[0045] The material of the outer cladding 600 is neoprene. For example, the outer cladding layer 600 mainly plays the role of protecting the second reinforcement layer 500, which has the characteristics of aging resistance, ozone resistance, temperature resistance, etc.
[0046] Technicians in this field can understand that in other embodiments, the inner lining layer 200 and the outer cladding 600 may also be selected from other materials, for example, the inner lining layer 200 can also be styrene-butadiene rubber, and the outer cladding 600 can also be chlorinated polyethylene rubber.
[0047] In the present embodiment, the material of the aramid braid layer is para-aramid. For example, para-aramid has better strength than other aramids and can meet the strength requirements of the hose 100.
[0048] Specifically, the chemical name of para-aramid is polyterephthayl-p-phenylenediamine, and the molecular structural formula of para-aramid is:
[0049] The para-aramid of the present embodiment is impregnated with resorcinol -formaldehyde -latex (RFL) to form a film on the surface of para-aramid, which significantly improves its bonding strength with the rubber material, so that the two can work better together and give full play to the reinforcing effect of para-aramid.
[0050] The density of para-aramid is 1.43 g / cm3 to 1.45 g / cm3, so as to meet the lightweight needs of hose 100. The tensile strength of para-aramid is 2900 Mpa to 3500Mpa, so it can withstand large tensile forces without breaking. The post-break elongation rate of para-aramid is 1.5%to 2.5%, which ensures that the rubber tube 100 will not undergo large elastic deformation when subjected to stress, so as to maintain the stability of the structure of the rubber tube 100. Specifically, the density of para-aramid can be selected as 1.43 g / cm3, 1.44 g / cm3, 1.45g / cm3, etc., the tensile strength can be selected as 2900Mpa, 3200 Mpa, 3500Mpa, etc., and the elongation rate after breaking can be selected as 1.5%, 2.0%, 2.5%, etc.
[0051] The coverage rate of the steel wire braid layer to the inner lining layer 200 or the medium rubber layer 400 is 90%to100%. That is, when the first reinforcement layer 300 is a steel wire braid, then the coverage rate of the wire braid layer to the inner lining layer 200 is 90%to100%, specifically, for example, the coverage rate of the steel wire braid layer to the inner lining layer 200 is 90%, 92%, 94%, 96%, 98%, 100%, etc. Correspondingly, when the second reinforcement layer 500 is the steel wire braid, the coverage rate of the steel wire braid layer to the medium rubber layer 400 is 90%~100%, such as 90%, 92%, 94%, 96%, 98%, 100%, etc.
[0052] The specific value for coverage can be adjusted within this range according to product demand pressures.
[0053] Since steel wire and rubber adhere well, there is no need to consider increasing adhesion by reducing coverage like aramid braids.
[0054] In the present embodiment, the medium rubber layer 400 is compounded from an adhesive, neoprene and nitrile rubber. For example, the medium rubber layer 400 acts as a bond between the aramid braid and the steel wire braid, and the buffer hose 100 acts as a friction between the two layers when the two layers are subjected to stress.
[0055] In the present embodiment, the material of the wire braid is copper-plated steel wire. For example, when the second reinforcement layer 500 is the wire braided layer, the sulfur of the rubber in the middle layer 400 and the outer layer 600 will react chemically with the copper on the surface of the copper-plated steel wire to form compounds such as cuprous sulfide (Cu2S) . This chemical bonding is much stronger than the simple physical adsorption, so that the rubber can be firmly attached to the surface of the steel wire, so that the bond between the wire braid layer and the middle rubber layer 400 and the outer coating layer 600 are more firm, and the overall performance of the hose 100 is improved.
[0056] When the rst reinforcement layer 300 is the steel wire braided layer, which is located between the inner lining layer 200 and the middle rubber layer 400, the sulfur of the rubber of the middle rubber layer 400 and the inner layer 200 will react chemically with the copper on the surface of the copper-plated steel wire to form compounds such as cuprous sulde (Cu2S) . This chemical bonding is much stronger than the simple physical adsorption, so that the rubber can be firmly attached to the surface of the steel wire, so that the bond between the wire braid layer and the middle rubber layer 400 and the inner lining layer 200 is more rm, and the overall performance of the hose is improved.
[0057] In the present embodiment, the weaving angle of the rst reinforcement layer 300 is 53.7° to 54.7°. For example, the weaving angle of the first reinforcement layer 300 is 53.7°, 53.9°, 54.1°, 54.3°, 54.5°, 54.7°, etc.
[0058] The second reinforcement layer 500 has a weave angle of 54.7° to 55.7°. For example, the weaving angle of the second reinforcement layer 500 is 54.7°, 54.9°, 55.1°, 55.3°, 55.5°, 55.7°, etc.
[0059] It should be noted that the first reinforcement layer 300 refers to the reinforcement layer between the inner lining layer 200 and the middle rubber layer 400, and the second reinforcement layer 500 refers to the reinforcement layer between the middle rubber layer 400 and the outer cladding layer 600, that is, whether the first reinforcement layer 300 is an aramid braid or a steel wire braid, its weaving angle is 53.7° to 54.7°, and similarly, whether the second reinforcement layer 500 is an aramid braid or a steel wire braid, its weaving angle is 54.7° to 55.7°.
[0060] In the braided reinforcement design of the hose 100, 54.7° is considered a theoretical equilibrium angle. When the hose 100 is subjected to internal pressure, at this angle, the axial stress and circumferential stress of the hose 100 can reach a good balance, so that the hose 100 has a strong bearing capacity, reduces the damage caused by local stress concentration, and prolongs the service life of the hose 100.
[0061] In the present embodiment, the weaving angles of the first reinforcement layer 300 and the second reinforcement layer 500 are slightly offset from the equilibrium angle 54.7°, and the weaving angles of the first reinforcement layer 300 and the second reinforcement layer 500 are located on both sides of the equilibrium angle respectively, when the hose 100 is subjected to internal pressure, the first reinforcement layer 300 and the second reinforcement layer 500 can work together to make the stress distribution more uniform and jointly bear the load, thereby improving the overall bearing capacity of the hose 100. Reduces damage caused by local stress concentration and extends the service life of the hose 100.
[0062] Taking the first reinforcement layer 300 as the aramid braided layer and the second reinforcement layer 500 as the steel wire braided layer as an example, the manufacturing process of the hose 100 of the embodiment is as follows:
[0063] 1. Use nitrile rubber or neoprene as raw material to form an inner lining layer 200 through the rubber extrusion process.
[0064] 2. Para-aramid treated with resorcinol-formaldehyde-latex (RFL) dipping is formed by the weaving process on the lining layer 200 prepared in the rst step, the weaving angle is controlled at 53.7° to 54.7°, and the weaving coverage is controlled at 85%to 95%.
[0065] 3. Nitrile rubber, neoprene rubber, and compound rubber as the medium rubber layer 400 calendered into film, and then wrapped on the first reinforcement layer 300 through the medium rubber wrapping device on the weaving machine to form the medium rubber layer 400.
[0066] 4. Using copper-plated steel wire from hose 100 as raw material, weave a second reinforcement layer 500 on top of the medium rubber layer 400.
[0067] 5. Using neoprene as the main raw material, a rubber layer is extruded outside the second reinforcement layer 500 through the rubber extrusion process as the outer coating of the hose 100 600.
[0068] 6. Steam vulcanization of the semi-finished products prepared before passing through a cloth covered with water.
[0069] 7. Dissolving cloth.
[0070] 8. Take out the mandrel and get the hose 100.
[0071] Although the present invention has been illustrated and described by referring to some preferred embodiments of the present invention, ordinary technical personnel in this field should understand that the above content is a further detailed explanation of the present invention in combination with the specic embodiment, and it cannot be determined that the specific implementation of the present invention is limited to these instructions. The technician in the field may make various changes in form and detail, including making a number of simple deductions or substitutions, without deviating from the spirit and scope of the invention.
Claims
1.A hose, which is characterized by the inner lining layer, the rst reinforcement layer, the middle rubber layer, the second reinforcement layer and the outer covering layer are arranged sequentially from the inside to the outside along the radial direction of the hose, whereby,-the rst reinforcing layer is an aramid braided layer, and the second reinforcing layer is a steel wire braided layer; or,-the first reinforcing layer is a steel wire braided layer, and the second reinforcing layer is an aramid braided layer.2.The hose of claim 1, wherein the inner lining layer, the first reinforcement layer, the middle adhesive layer, the second reinforcement layer and the outer covering layer are sequentially bonded.3.The hose of claim 2, wherein when the first reinforcing layer is an aramid braided layer, the aramid braided layer covers the inner lining layer of 85%to 95%, and a part of the lining layer exposes the aramid braid layer to bond with the middle adhesive layer.4.The hose of claim 2, wherein when the second reinforcement layer is an aramid braid, the aramid braid layer covers the medium adhesive layer by 85%to 95%, and a part of the medium adhesive layer exposes the aramid braid layer to bond with the outer covering layer.5.The hose of claim 3 or 4, wherein the material of the aramid braid layer is para-aramid; The material of the steel wire braid layer is copper-plated steel wire.6.The hose of claim 5, wherein the density of the para-aramid is 1.43 g / cm3 to 1.45g / cm3, the tensile strength is 2900Mpa to 3500Mpa, and the elongation rate after breaking is 1.5%to 2.5%.7.The hose of claim 5, wherein the para-aramid is treated with resorcinol-formaldehyde-latex dipping glue.8.The hose of claim 2, wherein the steel wire braid layer covers the inner lining layer or the middle rubber layer by 90%to100%.9.The hose of claim 1, wherein the first reinforcement layer has a weaving angle of 53.7° to 54.7°, and the weaving angle of the second reinforcement layer is 54.7° to 55.7°.10.The hose of claim 2, wherein the material of the inner lining layer is nitrile rubber or neoprene, the material of the outer covering layer is neoprene, and the middle rubber layer is made of a mixture of adhesive, neoprene and nitrile rubber.