Ultrahigh-pressure hose, framework of ultrahigh-pressure hose and ultrahigh-pressure hose assembly

Abstract

The utility model discloses an ultrahigh-pressure hose, a framework of the ultrahigh-pressure hose and an ultrahigh-pressure hose assembly, and belongs to the technical field of high-pressure rubber hoses. The ultrahigh-pressure rubber hose solves at least one of the problems of overweight overall weight and poor flexibility caused by large weight per unit length of the existing ultrahigh-pressure rubber hose. A framework of an ultrahigh-pressure hose is composed of a reinforcing material layer and a middle rubber buffer layer. The number of the reinforcing material layers is multiple, and the number of the middle rubber buffer layers is multiple. The reinforcing material layers and the middle rubber buffer layers are alternately arranged; wherein at least one reinforcing material layer is a high-strength fiber layer. While the strength of the framework is ensured, the weight of the framework is reduced, and the flexibility of the framework is improved.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure hose technology, and in particular to an ultra-high pressure hose and its skeleton, and an ultra-high pressure hose assembly. Background Technology

[0002] Currently, most ultra-high pressure hose skeletons on the market are composed of steel wire, steel wire rope, or a combination of both. Because the burst pressure requirement for ultra-high pressure hoses is higher than 236 MPa, and the inner diameter ranges from 2 to 5 inches, according to relevant calculation formulas, up to 10 layers of steel wire winding and 6 layers of steel wire rope winding are required. This results in excessively thick hose walls, a large weight per unit length of hose, and overall excessive weight. Moreover, the hoses have poor flexibility. These problems not only affect the ease of operation of the hoses but also pose challenges to transportation and installation. Especially in some special application scenarios, such as the transportation of fracturing fluid in shale gas extraction, the poor flexibility of existing ultra-high pressure hoses makes their use in confined spaces or complex terrains quite difficult. Summary of the Invention

[0003] In view of the above analysis, the present invention aims to provide an ultra-high pressure hose and its skeleton, and an ultra-high pressure hose assembly, to solve at least one of the following problems existing in the current ultra-high pressure hose: (1) the weight per unit length is too large, resulting in excessive overall weight; (2) poor flexibility.

[0004] The objective of this utility model is mainly achieved through the following technical solutions:

[0005] This utility model provides a skeleton for an ultra-high pressure hose, which is composed of a reinforcing material layer and a medium rubber buffer layer.

[0006] The reinforcing material layer consists of multiple layers, and the intermediate rubber buffer layer consists of multiple layers;

[0007] The reinforcing material layer and the intermediate rubber buffer layer are alternately arranged;

[0008] At least one of the reinforcing material layers is a high-strength fiber layer.

[0009] Furthermore, the number of reinforcing material layers is N layers, of which M layers are high-strength fiber layers and the remaining NM layers are steel wire layers; [1 / 3N]≤M≤N, where [1 / 3N] represents 1 / 3N rounded up; M and N are both even numbers.

[0010] Furthermore, the M-layer high-strength fiber layer is radially continuous in the skeleton, and the M-layer high-strength fiber layer and the medium-strength buffer layer are alternately arranged.

[0011] Furthermore, in the M-layer high-strength fiber layer, the winding directions of the odd-numbered and even-numbered high-strength fiber layers are opposite, and the winding angle increases layer by layer from the inside to the outside of the hose.

[0012] Furthermore, the winding angle is 51° to 59°.

[0013] Furthermore, the thickness of each intermediate rubber buffer layer is 0.5 to 1.5 mm.

[0014] Furthermore, the high-strength fiber layer includes a high-strength fiber core layer and a polyester and / or nylon sheath layer.

[0015] The present invention also provides an ultra-high pressure hose, comprising, from the inside out, a composite liner, an inner rubber layer, a first buffer layer, a skeleton, a second buffer layer, an outer rubber layer, and a protective layer, wherein the skeleton is as described above, and the composite liner is a double-layer structure consisting of a wear-resistant plastic layer and an affinity layer; the affinity layer is located between the wear-resistant plastic layer and the inner rubber layer.

[0016] This utility model also provides an ultra-high pressure hose assembly, including the ultra-high pressure hose as described above and an anti-loosening component. The anti-loosening component includes a first clamp, a second clamp, and a locking member. The first clamp and the second clamp are respectively fitted on both sides of the joint of the ultra-high pressure hose, and both the first clamp and the second clamp are clamped on the ultra-high pressure hose. The two ends of the locking member are respectively connected to the first clamp and the second clamp.

[0017] Furthermore, either the first clamp or the second clamp is formed by the attraction of two semi-circular magnetic components. The ultra-high pressure hose is equipped with a pressure sensor, and both the pressure sensor and the semi-circular magnetic components are connected to the magnetic control device.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] (1) The skeleton for ultra-high pressure hoses provided by this utility model optimizes the structure of the skeleton, thereby reducing its weight and improving its flexibility while ensuring its strength. Specifically, a high-strength fiber layer is used to partially or completely replace the steel wire layer commonly used in existing skeletons. While ensuring that the comprehensive performance of the ultra-high pressure hose, such as strength and pressure bearing capacity, is not affected, the weight per unit length of the ultra-high pressure hose is reduced and the flexibility of the ultra-high pressure hose is improved, effectively solving the problems of excessive weight and poor flexibility of existing ultra-high pressure hoses.

[0020] (2) The ultra-high pressure hose provided by this utility model, based on the optimization of the skeleton structure, further improves the wear resistance and corrosion resistance of the hose when transporting corrosive and / or muddy fluids (such as fracturing fluid in shale gas extraction). It upgrades the single-layer inner liner in the traditional ultra-high pressure hose, which is in direct contact with the fluid, to a double-layer composite liner. This improves the connection between the inner liner (composite liner) and other parts of the hose, thereby enhancing the hose's wear resistance, corrosion resistance, and service life. Specifically, the composite liner includes a wear-resistant plastic layer and an affinity layer. The affinity layer, as a transition layer between the wear-resistant plastic layer and the inner rubber layer, utilizes the good affinity between the affinity layer and the rubber to create a strong interfacial bond between the affinity layer and the inner rubber layer. This enhances the bonding strength between the inner liner (composite liner) and the inner rubber layer in the hose, effectively preventing the delamination phenomenon that occurs between the single-layer inner liner and the directly bonded inner rubber layer during use in traditional ultra-high pressure hoses, thus improving the overall performance and reliability of the ultra-high pressure hose.

[0021] (3) The ultra-high pressure hose assembly provided by this utility model provides an anti-loosening component at the joint of the ultra-high pressure hose, which includes a first clamp and a second clamp on both sides of the joint and a locking component connecting the two clamps, so as to further improve the connection reliability of the ultra-high pressure hose and avoid loosening at the joint when the pressure suddenly increases.

[0022] (4) In some preferred embodiments, the first clamp and the second clamp are formed by two semi-circular magnetic components attracting each other, and by equipping the hose assembly with a pressure sensor and a magnetic control device, the locking force of the anti-loosening component is adaptively adjusted according to the pressure change in the pipe, thereby further improving the reliability and safety of the ultra-high pressure hose joint.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0025] Figure 1 A schematic diagram of the skeleton of the ultra-high pressure hose provided in this embodiment of the utility model;

[0026] Figure 2This is a schematic diagram of the structure of the ultra-high pressure hose provided in an embodiment of the present utility model;

[0027] Figure label:

[0028] 1-Abrasion-resistant plastic layer; 2-Affinity layer; 3-Inner adhesive layer; 4-First buffer layer; 5-Reinforcing material layer; 6-Middle adhesive buffer layer; 7-Second buffer layer; 8-Outer adhesive layer; 9-Protective layer. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0030] In the first aspect, this utility model provides a skeleton for an ultra-high pressure hose, the skeleton of which is composed of a reinforcing material layer 5 and a medium rubber buffer layer 6;

[0031] The reinforcing material layer 5 has multiple layers, and the intermediate rubber buffer layer 6 has multiple layers;

[0032] The reinforcing material layer 5 and the intermediate rubber buffer layer 6 are alternately arranged;

[0033] At least one of the reinforcing material layers is a high-strength fiber layer.

[0034] Compared with existing technologies, the skeleton for ultra-high pressure hoses provided by this utility model optimizes the skeleton's structure, reducing its weight and improving its flexibility while ensuring its strength. Specifically, a high-strength fiber layer partially or completely replaces the steel wire layer commonly used in existing skeletons. This reduces the weight per unit length of the ultra-high pressure hose and improves its flexibility without affecting the overall performance of the hose, such as strength and pressure resistance, effectively solving the problems of excessive weight and poor flexibility in existing ultra-high pressure hoses.

[0035] In some preferred embodiments, the number of reinforcing material layers 5 is N, wherein M layers are high-strength fiber layers, and the remaining NM layers are steel wire layers; [1 / 3N]≤M≤N, where [1 / 3N] represents 1 / 3N rounded up; M and N are both even numbers. By setting at least one-third of the total number of reinforcing material layers as high-strength fiber layers, the weight per unit length of the hose can be significantly reduced and the flexibility of the hose can be improved while ensuring the hose strength to withstand high-pressure environments.

[0036] In some embodiments, the M-layer high-strength fiber layer is radially continuous in the skeleton, and the M-layer high-strength fiber layer is alternately arranged with the middle rubber buffer layer 6. In the M-layer high-strength fiber layer, the winding directions of the odd-numbered and even-numbered high-strength fiber layers are opposite, and the winding angle increases layer by layer from the inside to the outside of the hose. Exemplarily, the winding directions are left-handed and right-handed, respectively. Preferably, the winding angle is 51° to 59°. The opposite winding directions of the odd-numbered and even-numbered layers can create a mutually canceling effect when under stress, making the stress more evenly distributed throughout the structure and avoiding local stress concentration. By winding in both directions, fatigue damage caused by unidirectional stress is reduced, and the service life of the hose is extended. By the gradient change of the winding angle from the inside to the outside, the flexibility and rigidity of the skeleton can be optimized and balanced while saving materials and costs and without significantly increasing weight. The smaller winding angle of the inner layer makes the hose more flexible overall, while the larger winding angle of the outer layer provides the necessary rigid support, ensuring that the hose can maintain good shape stability under high pressure.

[0037] For example, N is 6 to 12.

[0038] For example, the thickness of each intermediate rubber buffer layer 6 is 0.5–1.5 mm. It comprehensively considers multiple factors such as stress dispersion, protection of the reinforcing material layer, adhesion effect, flexibility, temperature adaptability, and cost control, providing an optimized solution for ultra-high pressure hoses. A reasonable buffer layer thickness can maximize the strength, flexibility, and durability of the hose without sacrificing performance, ensuring its reliability and safety under extreme conditions.

[0039] In some embodiments, the high-strength fiber layer includes a high-strength fiber core layer and a polyester sheath layer and / or a nylon sheath layer. By employing such a high-strength fiber layer formed from high-strength fibers with a core-sheath structure, the interfacial affinity between the high-strength fiber layer and other rubber layers (e.g., a middle rubber buffer layer) can be improved while ensuring strength, thereby ensuring the bonding stability of the high-strength fiber layer with other layers in the skeleton.

[0040] Optionally, the high-strength fiber can be selected from existing materials, primarily considering its high strength and high modulus properties, such as a tensile strength ≥1.5 GPa, a central modulus of 100–140 GPa, and a surface modulus of 1–5 GPa. Exemplarily, it includes one or a combination of aramid fibers, carbon fibers, glass fibers, ultra-high molecular weight polyethylene fibers, and high-strength bio-based fibers.

[0041] In some embodiments, the high-strength fiber layer is composed of high-strength fibers and nylon, as well as at least one of polyester and nylon.

[0042] Optionally, the fiber connection structure of the high-strength fiber layer can be selected from existing weaving structures, exemplarily including one or a combination of several of the following: smooth weave, twill weave, satin weave, cross weave, multi-strand weave, figure-eight weave, biaxial weave, and triaxial weave.

[0043] Secondly, this utility model also provides an ultra-high pressure hose, comprising, from the inside out, a composite liner, an inner rubber layer 3, a first buffer layer 4, a skeleton, a second buffer layer 7, an outer rubber layer 8, and a protective layer 9, wherein the skeleton is as described in the first aspect, and the composite liner is a double-layer structure consisting of a wear-resistant plastic layer 1 and an affinity layer 2; the affinity layer 2 is located between the wear-resistant plastic layer 1 and the inner rubber layer 3.

[0044] Compared with existing technologies, the ultra-high pressure hose provided by this utility model, based on the optimization of the skeleton structure, further improves the wear resistance and corrosion resistance of the ultra-high pressure hose when transporting corrosive and / or silty fluids (such as fracturing fluid in shale gas extraction). It upgrades the single-layer inner liner in traditional ultra-high pressure hoses, which is in direct contact with the fluid, to a double-layer composite liner. This improves the connection between the inner liner (composite liner) and other parts of the ultra-high pressure hose, thereby enhancing the wear resistance, corrosion resistance, and service life of the hose. Specifically, the composite liner includes a wear-resistant plastic layer and an affinity layer. The affinity layer, as a transition layer between the wear-resistant plastic layer and the inner rubber layer, utilizes the good affinity between the affinity layer and the rubber to achieve a strong interfacial bond between the affinity layer and the inner rubber layer. This enhances the bonding strength between the inner liner (composite liner) and the inner rubber layer in the ultra-high pressure hose, effectively preventing the delamination phenomenon that occurs between the single-layer inner liner and the directly bonded inner rubber layer during use in traditional ultra-high pressure hoses, thus improving the overall performance and reliability of the ultra-high pressure hose.

[0045] In some preferred embodiments, the inner surface of the wear-resistant plastic layer 1 is further provided with a textured structure, which is selected from one or a combination of spiral texture, diamond texture, wavy texture, and sawtooth texture. By adding a textured structure to the inner surface of the wear-resistant plastic layer of the ultra-high pressure hose (i.e., the surface in direct contact with the fluid), the fluid can be guided to flow more evenly, reducing eddies and turbulence in the hose, thereby reducing the impact and wear of the fluid on the inner wall of the hose, i.e., the wear-resistant plastic layer, and improving fluid transmission efficiency; the textured structure helps to disperse the wear of the fluid on the inner wall of the hose, i.e., the wear-resistant plastic layer, making the wear more evenly distributed, avoiding excessive local wear, and thus extending the service life of the hose.

[0046] In some embodiments, the spiral texture has a pitch of 1.5–2.5 mm and a depth of 0.2–0.4 mm, employing a bidirectional spiral structure. It should be noted that this pitch range of 1.5–2.5 mm ensures that the fluid can flow effectively along the texture without generating excessive eddies or turbulence during flow, helping to maintain a stable flow state and reducing uneven wear on the inner surface of the wear-resistant plastic layer in the composite liner caused by turbulence. This depth range of 0.2–0.4 mm provides sufficient roughness to enhance the friction between the inner surface of the wear-resistant plastic layer in the composite liner and the fluid, making it less likely for solid particles (such as silt) in the fluid to deposit on the inner surface of the plastic layer, forming localized wear points, without excessively weakening the wear-resistant plastic layer in the composite liner. The bidirectional spiral structure, meaning that left-handed and right-handed spiral textures exist simultaneously on the same circumference of the inner surface of the wear-resistant plastic layer in the composite liner, allows the fluid to form complex flow paths during flow, further reducing the possibility of localized wear, and maintaining good stability under pressure from different directions.

[0047] In some embodiments, the rhombus texture has a side length of 0.5–2 mm, with alternating interior angles of α and 180°–α, and its depth gradually changes from 0.2 mm to 0.4 mm from the center to the edge, with α being 60–120°. It should be noted that the smaller side length of 0.5–2 mm increases the texture density, making the inner surface of the wear-resistant plastic layer in the composite liner rougher, thereby improving the ability to capture solid particles in the fluid and preventing direct impact wear from particles on the inner surface of the plastic layer in the composite liner. The design of the interior angles of the rhombus texture as alternating α and 180°–α, with α = 60–120°, allows the fluid to produce complex refraction and reflection phenomena when flowing over the textured surface, promoting fluid mixing and dispersion, and avoiding corrosion and wear caused by local fluid stagnation. The gradual depth design, with the depth gradually increasing from 0.2 mm to 0.4 mm from the center to the edge of the rhombus, allows the central area to guide the fluid while the edge area better resists wear from solid particles, while ensuring the overall structural strength.

[0048] In some embodiments, the wavy texture is composed of alternating combinations of sine and cosine waves with wavelengths of 2–4 mm and amplitudes of 0.1–0.3 mm. It should be noted that this wavelength range of 2–4 mm can accommodate common fluid flow characteristics, causing the fluid to oscillate periodically on the wavy texture. This helps to break down the fluid boundary layer, reduce boundary layer separation, and thus lower fluid resistance. An appropriate amplitude of 0.1–0.3 mm can provide sufficient roughness on the inner surface of the wear-resistant plastic layer without affecting the overall structural strength of the wear-resistant plastic layer in the composite liner. This enhances the interaction between the inner surface texture and solid particles in the fluid, making it easier for solid particles to flow with the fluid and prevent them from depositing on the inner surface of the wear-resistant plastic layer and forming wear sources.

[0049] In some embodiments, the serrated texture is composed of isosceles triangles with side lengths of 0.5 to 2 mm, interior angles α = 60 to 120°, and depths of 0.2 to 0.4 mm connected in sequence.

[0050] Optionally, the material of the affinity layer 2 can be selected from existing materials, with the main consideration being its good affinity with the inner adhesive layer 3. For example, the affinity layer 2 includes, but is not limited to, at least one of a nylon layer and a polyester layer.

[0051] For example, the thickness of the affinity layer 2 is 0.8 to 1.5 mm. This thickness range ensures good affinity between the affinity layer and the inner adhesive layer, avoiding the bonding effect being affected by being too thin, and also preventing uneven bonding or increased internal stress due to being too thick.

[0052] Optionally, the material of the wear-resistant plastic layer 1 can be selected from existing materials, with the main considerations being its excellent acid corrosion resistance and wear resistance. For example, the wear-resistant plastic layer 1 includes at least one of the following: ultra-high molecular weight polyethylene layer, polyketide layer, polyimide layer, polyamide-imide layer, polytetrafluoroethylene layer, polyphenylene sulfide layer, nylon + polytetrafluoroethylene composite layer, nylon + molybdenum disulfide composite layer, polyoxymethylene + polytetrafluoroethylene composite layer, polyoxymethylene + silicone oil composite layer, and polycarbonate + polytetrafluoroethylene composite layer.

[0053] In some embodiments, the wear-resistant plastic layer 1 is a composite layer of wear-resistant and corrosion-resistant plastic and wear-resistant particles. The wear-resistant particles are selected from one or more combinations of silicon carbide, alumina, and diamond, and the particle size of the wear-resistant particles is 10-50 μm, with a content of 2-15%.

[0054] This invention effectively improves the wear resistance of ultra-high pressure hoses by setting a special textured structure on the inner surface of the wear-resistant plastic layer and / or using a composite layer of wear-resistant and corrosion-resistant plastic + wear-resistant particles as the wear-resistant plastic layer. In simulated mud and sand abrasion tests, after 1000 hours of wear, the wear amount of the composite liner in the ultra-high pressure hose of this invention does not exceed 0.5mm, which is at least 30% higher than the single-layer liner of traditional ultra-high pressure hoses.

[0055] To further improve the adaptability of ultra-high pressure hoses to various complex working conditions, in some preferred embodiments, the ultra-high pressure hose also includes a heat insulation layer and / or an antistatic layer; wherein, the heat insulation layer is disposed between the skeleton and the outer rubber layer 8, and the antistatic layer is disposed between the skeleton and the inner rubber layer 3. For ultra-high pressure hoses, in some cases, they need to operate under harsh environmental conditions such as high temperature and high pressure, such as deep well operations or high-temperature formations. The heat insulation layer can effectively isolate external heat, prevent the internal temperature of the hose from becoming too high, thereby protecting the key components inside the hose from heat damage, ensuring that the fluid inside the hose maintains an appropriate temperature during transmission, and avoiding performance fluctuations caused by temperature changes. During the flow of high-pressure liquids, especially when containing fracturing fluids with low conductivity, static electricity is easily generated. The antistatic layer can effectively conduct and dissipate static charge, preventing static electricity from accumulating to dangerous levels.

[0056] Optionally, the materials of the heat insulation layer and the antistatic layer can be selected from existing materials. When selecting, the main considerations are that the heat insulation layer has good heat insulation performance and the antistatic layer has good static electricity discharge capability.

[0057] Optionally, the material of the inner rubber layer can be selected from existing materials. For example, the inner rubber layer 3 includes, but is not limited to, at least one of natural rubber, styrene-butadiene rubber, and cis-butadiene rubber.

[0058] For example, the first buffer layer 4, the intermediate rubber buffer layer 6, and the second buffer layer 7 are composed of rubber-coated fabric. The rubber-coated fabric can be one or more layers. For multi-layered rubber-coated fabric, the winding directions of odd-numbered and even-numbered layers are opposite; for example, the winding directions alternate between left-handed and right-handed rotations. The winding direction of the rubber-coated fabric is the same as the winding direction of the reinforcing material layer adjacent to the rubber-coated fabric.

[0059] For example, the thickness of the first buffer layer 4 and the second buffer layer 7 is 0.5 to 1.5 mm.

[0060] Optionally, the material of the outer rubber layer can be selected from existing materials, with the main consideration being its good wear resistance and environmental aging resistance. For example, the outer rubber layer 8 includes at least one of a chloroprene rubber layer, a hydrogenated nitrile rubber layer, a fluororubber layer, and a EPDM rubber layer.

[0061] Optionally, the material of the protective layer can be selected from existing materials, with the primary consideration being its good cut and puncture resistance. For example, the protective layer 9 includes at least one of ultra-high molecular weight polyethylene fiber braided layer, high-performance rayon braided layer, and steel wire braided layer.

[0062] For example, the thicknesses of the inner adhesive layer 3 and the outer adhesive layer 8 are 3 to 5 mm. For instance, the thickness of the inner adhesive layer 3 is 2 to 3 mm, and the thickness of the outer adhesive layer 8 is 3 to 4 mm.

[0063] Thirdly, this utility model also provides an ultra-high pressure hose assembly, including the ultra-high pressure hose as described above and an anti-loosening component. The anti-loosening component includes a first clamp, a second clamp, and a locking member. The first clamp and the second clamp are respectively fitted on both sides of the joint of the ultra-high pressure hose, and both the first clamp and the second clamp are clamped on the ultra-high pressure hose. The two ends of the locking member are respectively connected to the first clamp and the second clamp.

[0064] In some preferred embodiments, either the first clamp or the second clamp is formed by the attraction of two semi-circular magnetic components, and a pressure sensor is installed inside the ultra-high pressure hose. Both the pressure sensor and the semi-circular magnetic components are connected to a magnetic control device.

[0065] It is understandable that the pressure sensor monitors and collects the fluid pressure information inside the ultra-high pressure hose, and transmits the pressure information to the magnetic control device. The magnetic control device adjusts the attraction between the two semi-circular magnetic components according to the pressure change, so as to achieve adaptive adjustment of the locking force of the anti-loosening component at the ultra-high pressure hose joint.

[0066] For example, each semi-circular magnetic component includes a permanent magnet and an electromagnet. The permanent magnet provides the basic attractive force, while the electromagnet can enhance or weaken the attractive force as needed.

[0067] For example, the pressure sensor communicates with the magnetic control device wirelessly or via wired means to transmit pressure information in real time.

[0068] For example, the magnetic control device includes a central processing unit (CPU) / microcontroller, a power management system, and an interface structure.

[0069] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A skeleton of an ultra-high pressure hose, characterized in that, The skeleton of the ultra-high pressure hose is composed of a reinforcing material layer (5) and a middle rubber buffer layer (6); The number of the reinforcing material layer (5) is multiple layers, and the number of the middle rubber buffer layer (6) is multiple layers; The reinforcing material layer (5) and the middle rubber buffer layer (6) are arranged alternately; At least one of the reinforcing material layers is a high-strength fiber layer.

2. The framework of claim 1, wherein, The number of the reinforcing material layer (5) is N layers, wherein M layers of the reinforcing material layer (5) are high-strength fiber layers, and the remaining N-M layers of the reinforcing material layer (5) are steel wire layers; [1 / 3N]≤M≤N, [1 / 3N] represents 1 / 3N rounded up; M and N are both even numbers.

3. The framework of claim 2, wherein, The M layers of the high-strength fiber layers are distributed continuously in the radial direction in the skeleton, and the M layers of the high-strength fiber layers and the middle rubber buffer layer (6) are arranged alternately.

4. The framework of claim 3, wherein, In the M layers of the high-strength fiber layers, the winding directions of the odd-numbered layers and the even-numbered layers of the high-strength fiber layers are opposite, and the winding angles increase layer by layer from the inside to the outside of the hose.

5. The framework of claim 4, wherein, The winding angle is 51°-59°.

6. The framework of claim 1, wherein, The thickness of each layer of the middle rubber buffer layer (6) is 0.5-1.5 mm.

7. The framework of claim 1, wherein, The high-strength fiber layer includes a high-strength fiber core layer and a polyester skin layer and / or a nylon skin layer.

8. An ultra-high pressure hose, characterized by The composite inner liner, the inner rubber layer (3), the first buffer layer (4), the skeleton, the second buffer layer (7), the outer rubber layer (8), and the protective layer (9) are sequentially arranged from the inside to the outside, the skeleton is as claimed in any one of claims 1-7, the composite inner liner has a double-layer structure composed of a wear-resistant plastic layer (1) and an affinity layer (2); the affinity layer (2) is located between the wear-resistant plastic layer (1) and the inner rubber layer (3).

9. An ultra-high pressure hose assembly characterized by, The ultra-high pressure hose as claimed in claim 8 and an anti-loosening member are provided, the anti-loosening member includes a first clamp, a second clamp, and a locking piece, the first clamp and the second clamp are respectively sleeved on both sides of the joint of the ultra-high pressure hose, and the first clamp and the second clamp are clamped on the ultra-high pressure hose, and the two ends of the locking piece are respectively connected to the first clamp and the second clamp.

10. The ultra-high pressure hose assembly of claim 9, wherein, Any one of the first clamp and the second clamp is formed by the attraction of two semicircular magnetic components, a pressure sensor is arranged inside the ultra-high pressure hose, and the pressure sensor and the semicircular magnetic components are connected to a magnetic force control device.

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