Multi-layer hose body structure
By incorporating spiral and braided layers into the fracturing hose and employing different materials and structural designs, the problems of excessive weight and cost of traditional fracturing hoses have been solved, achieving the effects of lightweighting and cost reduction.
Patent Information
- Application Number
- CN202423284193.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Traditional fracturing hoses are designed using a single material, resulting in a large margin, which increases costs and the weight of the hose, making it difficult to reduce weight while ensuring pressure resistance.
A winding layer and a braided layer are set between the inner and outer adhesive layers. The winding layer and the braided layer adopt different materials and structural designs. The winding direction of adjacent layers is opposite. The winding angle and tension are optimized through coordination equations to achieve the best pressure-bearing structure.
It achieves a significant reduction in the weight and production cost of fracturing hoses while ensuring pressure resistance, and enhances the flexibility and rigidity of the hose body to adapt to different working conditions.
Smart Images
Figure CN223498978U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fracturing hose technology, and more specifically, to a multi-layer hose body structure. Background Technology
[0002] Traditional fracturing hoses typically use the same material for reinforcement, namely steel wire or steel rope, with two to ten layers of interwoven winding. However, when designing the hose body, using only a single material for pressure design results in a large margin of safety. For example, if a customer requires a burst pressure of 100 MPa, current technology using a single material would require six layers of steel rope, resulting in a calculated pressure of 120 MPa. This margin is too large, often described as "overkill," and increases both cost and hose weight. Using only four layers would only provide 90 MPa, which is insufficient. Therefore, the technical problem this invention aims to solve is how to minimize hose weight and reduce production costs while maintaining pressure resistance. Thus, it is necessary to propose a hose body structure to at least partially address the problems existing in the prior art. Utility Model Content
[0003] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.
[0004] To at least partially solve the above problems, this utility model provides a multi-layer hose body structure, including an inner rubber layer and an outer rubber layer disposed on the outer wall of the hose, wherein an A-layer winding layer and a B-layer braiding layer are disposed between the inner rubber layer and the outer rubber layer, wherein A≥0, B≥0, and A+B≥1, and at least two protective layers are disposed on the outer wall of the inner rubber layer and the inner wall of the outer rubber layer.
[0005] Preferably, the winding layer is formed by at least one winding material spirally wound around the hose as the central axis.
[0006] Preferably, the braided layer is formed by at least one braided material spirally wound around the central axis of the hose.
[0007] Preferably, the winding material is made of one or more of steel wire, steel wire rope, aramid and carbon fiber, and the winding materials of adjacent winding layers are the same or different.
[0008] Preferably, the braided material is made of one or more of steel wire, steel wire rope, aramid and carbon fiber, and the braided materials of adjacent braided layers may be the same or different.
[0009] Preferably, the winding directions of the winding materials in two adjacent winding layers are opposite.
[0010] Preferably, the winding directions of the woven materials in two adjacent woven layers are opposite.
[0011] Preferably, the axial deformation compatibility equation of the winding layer or braided layer is as follows:
[0012]
[0013] ε1—Deformation of the first layer of wound or woven material under pressure;
[0014] ε n —The deformation of the nth layer of wound or woven material under pressure;
[0015] α1—First layer winding angle;
[0016] α n —The nth layer of winding angle;
[0017] β1—Equilibrium angle of the first layer of winding under pressure;
[0018] β n —The equilibrium angle of the nth layer of winding under pressure;
[0019] When calculating the winding layers, n is the number of winding layers A; when calculating the braided layers, n is the number of braided layers B.
[0020] The radial displacement compatibility equations of the winding layer (3) or braided layer (4) are as follows:
[0021]
[0022] in,
[0023]
[0024] D1—First layer balance and winding diameter (mm);
[0025] D n — The balance and winding diameter of the nth layer (mm).
[0026] Preferably, the constant compatibility equation for the contribution of the axial and circumferential components of the tension of the winding layer (3) or braided layer (4) to the bearing pressure is as follows:
[0027]
[0028] —Circumferential component pressure contribution function;
[0029] —Axial component pressure contribution function;
[0030] The circumferential pressure contribution function of the nth layer is:
[0031]
[0032] The axial pressure contribution function of the nth layer is:
[0033]
[0034] The circumferential force of the nth layer is:
[0035]
[0036] The axial force of the nth layer is:
[0037]
[0038] The balance pitch of the nth layer is:
[0039]
[0040] The diameter of the nth layer in equilibrium is:
[0041]
[0042] d—Diameter (mm) of the wound or woven material;
[0043] f—Tensile strength (N) of the wound or woven material;
[0044] N n —The total number of strands of the nth layer of wound or woven material.
[0045] Preferably, the zero-centering torque condition equation for the winding layer or braided layer is as follows:
[0046]
[0047] Since the odd-numbered layers and the even-numbered layers are wound in opposite directions, the torques generated by the tension on the hose axis are different, so it is assumed that the sum of the torques is equal to zero.
[0048] Compared with the prior art, the present invention has at least the following beneficial effects:
[0049] The protective layer protects the hose and the reinforcing layer, and because the steel wires in the protective layer are generally thin and only serve to protect the hose, the spiral wound layer, and the braided layer, its weight is negligible. Furthermore, the spiral wound layer and the braided layer can be designed with different structures and materials depending on the operating conditions, thereby significantly reducing the weight of the fracturing hose. If a single material is used in the hose body design, the pressure design margin will be too large, resulting in waste. This application aims to achieve the optimal pressure-bearing structural design by allowing for material selection, design, and adjustment of the spiral wound layer and the braided layer, thereby reducing weight and cost.
[0050] The multi-layer flexible tube structure described in this utility model, other advantages, objectives and features of this utility model will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this utility model. Attached Figure Description
[0051] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0052] Figure 1 This is a schematic diagram showing a winding layer (A=2, B=0) with different winding materials (steel wire rope and steel wire) spaced out.
[0053] Figure 2 This is a schematic diagram showing a winding layer (A=4, B=0) with different winding materials (steel wire rope and steel wire) spaced out.
[0054] Figure 3 This is a schematic diagram showing two layers of different winding materials (steel wire rope and steel wire) set sequentially when only one winding layer is set (A=4, B=0).
[0055] Figure 4 This is a schematic diagram showing a winding layer (A=6, B=0) with different winding materials (steel wire rope and steel wire) spaced out.
[0056] Figure 5 This is a schematic diagram showing two layers of different winding materials (steel wire rope and steel wire) set sequentially when only one winding layer is set (A=6, B=0).
[0057] Figure 6 This is a schematic diagram showing a winding layer (A=8, B=0) with different winding materials (steel wire rope and steel wire) spaced out.
[0058] Figure 7 This is a schematic diagram showing two layers of different winding materials (steel wire rope and steel wire) set sequentially when only one winding layer is set (A=8, B=0).
[0059] Figure 8 This is a schematic diagram showing a scenario where only one type of winding material (steel wire rope) is used (A=6, B=0).
[0060] Figure 9 This is a schematic diagram showing a scenario where only one type of winding material (steel wire rope) is used (A=8, B=0).
[0061] Figure 10 This is a schematic diagram showing a scenario where only one type of woven material is used (A=0, B=4).
[0062] Figure 11 This is a schematic diagram showing how to simultaneously set up a winding layer and a braided layer (when A=2, B=2), and how to alternately set up braided material and winding material (steel wire rope).
[0063] Figure 12 A schematic diagram showing how to simultaneously set up a winding layer and a braided layer (when A=2, B=2), and how to set up the braided material and the winding material (steel wire rope) sequentially.
[0064] Figure 13 This is a schematic diagram showing how to simultaneously set up a winding layer and a braided layer (when A=2, B=2), and how to alternately set up braided material and winding material (steel wire).
[0065] Figure 14 A schematic diagram showing how to simultaneously set up a winding layer and a braided layer (when A=2, B=2), and how to set up the braided material and the winding material (steel wire) sequentially.
[0066] In the diagram: 1 Inner adhesive layer, 2 Outer adhesive layer, 3 Wrapping layer, 4 Braided layer, 5 Protective layer. Detailed Implementation
[0067] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.
[0068] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.
[0069] like Figures 1-14As shown, this utility model provides a multi-layer hose body structure, including an inner rubber layer 1 and an outer rubber layer 2 disposed on the outer wall of the hose. A skeleton layer composed of a winding layer A 3 and a braided layer B 4 is disposed between the inner rubber layer 1 and the outer rubber layer 2, wherein A≥0, B≥0, and A+B≥1. At least two protective layers 5 are disposed on the outer wall of the inner rubber layer 1 and the inner wall of the outer rubber layer 2. Spacers are disposed between adjacent protective layers 5, between protective layers 5 and the skeleton layer, between adjacent winding layers 3, between adjacent braided layers 4, between adjacent winding layers 3 and braided layers 4, between the inner rubber layer 1 and the protective layer 5, and between the outer rubber layer 2 and the protective layer 5. These spacers are typically made of rubber and are used to separate the various layered structures to prevent interference between the layers.
[0070] The winding layer 3 is formed by spirally winding at least one strand of winding material around a central axis of a flexible tube. The winding material is made of one or more of steel wire, steel wire rope, aramid fiber, and carbon fiber, and adjacent winding layers 3 may have the same or different winding material. For example, each layer of winding layer 3 may use steel wire rope as the winding material. Figure 8 and Figure 9 As shown, alternating or sequential arrangement of layers using steel wire as the winding material and layers using steel wire rope as the winding material is also possible. Figures 1-7 As shown.
[0071] The braided layer 4 is formed by at least one strand of braided material spirally wound around the central axis of the hose. The braided material is made of one or more of the following: steel wire, steel rope, aramid fiber, and carbon fiber, and adjacent braided layers 4 may have the same or different braided material. For example, each layer of braided layer 4 may be made of steel wire as the braided material. Figure 10 As shown, one layer can be made of steel wire as the braiding material, and another layer can be made of steel wire rope as the braiding material, alternating or sequentially.
[0072] The winding directions of the winding materials in two adjacent winding layers 3 are opposite. The winding directions of the braiding materials in two adjacent braided layers 4 are opposite. That is, the winding directions of the odd-numbered winding materials and even-numbered winding materials in winding layers 3 are opposite; the winding directions of the odd-numbered braided materials and even-numbered braided materials in braided layers 4 are opposite; and the winding directions of the winding materials and braiding materials in adjacent winding layers 3 and braided layers 4 are also opposite. Figure 11 and Figure 12 As shown.
[0073] If E represents steel wire and G represents steel wire rope, taking four layers as an example, the combinations can be represented as E+E+G+G, E+G+E+G, E+G+G+E, G+E+E+G, G+E+G+E, G+G+E+E, and so on. The number of winding layers 3 and braided layers 4 varies depending on the number of layers used (using only winding layer 3, i.e., A≥1, B=0; using only braided layer 4, i.e., A=0, B≥1; using both winding layer 3 and braided layer 4, i.e., A≥1, B≥1, and the winding layer 3...). The combination of materials used (e.g., the winding material can be made of only steel wire, only steel wire rope, only aramid, only carbon fiber, or a combination of steel wire and steel wire rope, aramid and steel wire, etc., and the material selection for the braided material is similar) allows for a variety of combinations. This enhances both the rigidity and flexibility of the hose, and allows for structural adjustments to the fracturing hose based on different operating conditions (some require a stiffer hose, others a softer one). The protective layer 5 provides protection for the hose and the skeleton layer, and because the steel wires in the protective layer 5 are generally thin and only serve to protect the hose, winding layer 3, and braided layer 4, its weight is negligible. The winding layer 3 and braided layer 4 can be designed with different structures and materials depending on the operating conditions, thus significantly reducing the weight of the fracturing hose. When designing the tube body, if a single material is used, the pressure design margin is too large, which will result in waste. In order to achieve the best pressure-bearing structure design, this application allows for material selection, design and adjustment of the winding layer 3 and the braided layer 4, thereby reducing weight and lowering costs.
[0074] For example, if a customer requires a burst pressure of 100 MPa, using existing technology with a single material would require six layers of wire rope, resulting in a pressure of 120 MPa, which is too large a margin. Using only four layers would only provide 90 MPa, which is insufficient. However, this application allows for a single winding layer (3), using a combination of four layers of wire rope and two layers of wire to meet the customer's needs.
[0075] Taking the use of steel wire rope as the winding or braiding material as an example, to improve the burst pressure that this application can withstand, multi-layer braiding or multi-layer winding is usually used to reinforce the fracturing hose. During winding, the winding angle of the steel wire rope needs to be calculated. In this embodiment, "mixed layer" refers to one or a combination of two of the winding layer 3 or braided layer 4, and the axial deformation compatibility equation of the mixed layer is:
[0076]
[0077] ε1—Deformation of the first layer of steel wire under pressure;
[0078] ε n —Deformation of the steel wire in the nth layer under pressure;
[0079] α1—First layer winding angle;
[0080] α n —The nth layer of winding angle;
[0081] β1—Equilibrium angle of the first layer of winding under pressure;
[0082] β n —The equilibrium angle of the nth layer of winding under pressure;
[0083] When calculating the winding layers, n is the number of winding layers A; when calculating the braided layers, n is the number of braided layers B.
[0084] The radial displacement compatibility equations are as follows
[0085]
[0086] in,
[0087]
[0088] D1—First layer balance and winding diameter (mm);
[0089] D n — The balance and winding diameter of the nth layer (mm).
[0090] The constant compatibility equation for the contribution of the axial and circumferential components of tension to bearing pressure is as follows:
[0091]
[0092] —Circumferential component pressure contribution function;
[0093] —Axial component pressure contribution function;
[0094] The circumferential pressure contribution function of the nth layer is:
[0095]
[0096] The axial pressure contribution function of the nth layer is:
[0097]
[0098] The circumferential force of the nth layer is:
[0099]
[0100] The axial force of the nth layer is:
[0101]
[0102] The balance pitch of the nth layer is:
[0103]
[0104] The diameter of the nth layer in equilibrium is:
[0105]
[0106] d—Diameter of the wire rope (mm);
[0107] f—Tensile strength of steel wire rope (N);
[0108] N n —The total number of steel wire ropes in the nth layer.
[0109] The zero-alignment torque condition equation is
[0110]
[0111] Since the odd-numbered and even-numbered layers are wound in opposite directions, the torques generated by the tension on the hose axis are different; therefore, it is assumed that the sum of the torques is zero.
[0112] α1, ..., α n ;β1,…,β n
[0113] It is an unknown;
[0114] D1, ..., D n ;f;d;N n
[0115] Given that the angle of the multi-layer rope winding is crucial for the design of fracturing hoses in this invention, the winding angle of the mixed layer should strictly adhere to the above formula requirements during the production process.
[0116] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0117] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0118] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A multi-layer flexible hose body structure, comprising an inner rubber layer (1) and an outer rubber layer (2) disposed on the outer wall of the hose, characterized in that, A layer of winding (3) and B layer of braiding (4) are provided between the inner adhesive layer (1) and the outer adhesive layer (2), wherein A≥0, B≥0, A+B≥1, and at least two protective layers (5) are provided on the outer wall of the inner adhesive layer (1) and the inner wall of the outer adhesive layer (2).
2. The multi-layer flexible tube structure according to claim 1, characterized in that, The winding layer (3) is formed by at least one winding material spirally wound around the hose as the central axis.
3. The multi-layer flexible tube structure according to claim 2, characterized in that, The braided layer (4) is formed by at least one braided material spirally wound around the central axis of the hose.
4. The multi-layer flexible tube structure according to claim 2, characterized in that, The winding material is made of one or more of steel wire, steel wire rope, aramid and carbon fiber, and the winding materials of adjacent winding layers (3) are the same or different.
5. The multi-layer flexible tube structure according to claim 3, characterized in that, The woven material is made of one or more of steel wire, steel wire rope, aramid and carbon fiber, and the woven materials of adjacent woven layers (4) are the same or different.
6. The multi-layer flexible tube structure according to claim 4, characterized in that, The winding directions of the winding materials in two adjacent winding layers (3) are opposite.
7. The multi-layer flexible tube structure according to claim 5, characterized in that, The woven materials of two adjacent woven layers (4) are wound in opposite directions.
8. The multi-layer flexible tube structure according to claim 3, characterized in that, The axial deformation compatibility equation of the winding layer (3) or braided layer (4) is as follows: ε1—Deformation of the first layer of wound or woven material under pressure; ε n —The deformation of the nth layer of wound or woven material under pressure; α1—First layer winding angle; α n —The nth layer of winding angle; β1—Equilibrium angle of the first layer of winding under pressure; β n —The equilibrium angle of the nth layer of winding under pressure; n—When calculating the winding layer (3), n is the number of layers A of the winding layer (3); when calculating the braided layer (4), n is the number of layers B of the braided layer (4); The radial displacement compatibility equations of the winding layer (3) or braided layer (4) are as follows: in, D1—First layer balance and winding diameter (mm); D n — The balance and winding diameter of the nth layer (mm).
9. The multi-layer flexible tube structure according to claim 8, characterized in that, The constant coordination equation for the contribution of the axial and circumferential components of the tension of the winding layer (3) or braided layer (4) to the pressure bearing is as follows: —Circumferential component pressure contribution function; —Axial component pressure contribution function; The circumferential pressure contribution function of the nth layer is: The axial pressure contribution function of the nth layer is: The circumferential force of the nth layer is: The axial force of the nth layer is: The balance pitch of the nth layer is: The diameter of the nth layer in equilibrium is: d—Diameter (mm) of the wound or woven material; f—Tensile strength (N) of the wound or woven material; N n —The total number of strands of the nth layer of wound or woven material.
10. The multi-layer flexible tube structure according to claim 9, characterized in that, The zero-centering torque condition equation for the winding layer (3) or braided layer (4) is as follows: Since the odd-numbered layers and the even-numbered layers are wound in opposite directions, the torques generated by the tension on the hose axis are different, so it is assumed that the sum of the torques is equal to zero.