A hose body structure

Abstract

The present invention discloses a hose body structure, comprising: an inner rubber layer, an outer rubber layer, and a skeleton layer arranged between the inner rubber layer and the outer rubber layer, wherein the inner rubber layer is arranged on the outer wall of the hose, and two protective layers are arranged between the inner rubber layer and the skeleton layer, and between the skeleton layer and the outer rubber layer. The protective layer can provide protection for the hose and the skeleton layer, and because the steel wire of the protective layer is generally thinner and only plays the role of protecting the hose and the skeleton layer, its weight can be ignored. The skeleton layer can be designed with different structures and materials, thereby greatly reducing the weight of the fracturing hose. When designing the tube body, if a single material is used, the margin of the pressure design is large, which will cause waste. In order to achieve the best pressure-bearing structure design, the present application can select, design and adjust the material of the skeleton layer, thereby reducing weight and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing hoses, and more particularly to a hose body structure. Background Art

[0002] Conventional fracturing hoses all use the same material in the selection of reinforcement structures, that is, all are steel wires, or all are steel wire ropes, and then have a winding structure with two to ten layers, and all are cross-wound structures.

[0003] However, when designing the tube body, if only a single material is used for pressure design, there will be a large margin, which is often referred to as a big horse pulling a small cart. In addition, due to the large margin, the cost and the weight of the tube body will increase. Therefore, how to reduce the weight of the tube body and reduce the production cost as much as possible while ensuring the pressure bearing capacity is the technical problem to be solved by the present invention. Therefore, it is necessary to propose a hose tube structure to at least partially solve the problems existing in the prior art. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the present invention provides a hose body structure, comprising: an inner rubber layer, an outer rubber layer, and a skeleton layer arranged between the inner rubber layer and the outer rubber layer, the inner rubber layer is arranged on the outer wall of the hose, two protective layers are arranged between the inner rubber layer and the skeleton layer, and between the skeleton layer and the outer rubber layer, and an interlayer is arranged between two adjacent protective layers and between the protective layer and the skeleton layer.

[0006] Preferably, the protective layer is arranged on the outer wall of the hose or on the interlayer of the skeleton layer.

[0007] Preferably, the skeleton layer consists of a layer A of winding structure and a layer B of braided structure, wherein A≥0, B≥0, A+B≥1, and interlayers are provided between each layer of winding structure, between the winding structure and the adjacent braided structure, and between each layer of braided structure.

[0008] Preferably, the winding directions of two adjacent winding structures are opposite.

[0009] Preferably, the winding directions of two adjacent braided structures are opposite.

[0010] Preferably, the skeleton layer is made of any one of steel wire, steel rope, aramid, carbon fiber, or any combination of multiple thereof.

[0011] Preferably, the axial deformation coordination equation of the winding structure or the braided structure is:

[0012]

[0013] —Deformation of the first layer of steel wire under pressure;

[0014] —Deformation of the wire in the nth layer under pressure;

[0015] —1st layer winding angle;

[0016] — winding angle of the nth layer;

[0017] —Balance angle of the first winding layer under pressure;

[0018] —Equilibrium angle of the nth winding layer under pressure;

[0019] —When calculating the winding structure, n is the number of layers A of the winding structure; when calculating the braided structure, n is the number of layers B of the braided structure.

[0020] Preferably, the radial displacement coordination equations of the winding structure or the braided structure are:

[0021]

[0022] in,

[0023]

[0024]

[0025] —First layer balance and winding diameter (mm);

[0026] —Balance and winding diameter of the nth layer (mm).

[0027] Preferably, the identical coordination equation for the contribution of the axial and circumferential components of the tension of the winding structure or braided structure to the pressure is:

[0028]

[0029] — Circumferential component pressure contribution function;

[0030] —Axial component pressure contribution function;

[0031] Among them, the circumferential pressure contribution function of the nth layer is:

[0032]

[0033] The contribution function of the axial pressure of the nth layer is:

[0034]

[0035] The circumferential force of the nth layer is:

[0036]

[0037] The axial force of the nth layer is:

[0038]

[0039] The balance pitch of the nth layer is:

[0040]

[0041] The diameter of the nth layer in equilibrium is:

[0042]

[0043] —Wire rope diameter (mm);

[0044] —Tensile strength of steel wire rope (N);

[0045] —Total number of steel wire ropes in the nth layer.

[0046] Preferably, the zero centering torque condition equation of the winding structure or braided structure is:

[0047]

[0048] Since the odd-numbered layers and the even-numbered layers are wound in opposite directions, the torques generated by the tension on the axis of the hose are different, so it is assumed that the sum of the torques is equal to zero.

[0049] Compared with the prior art, the present invention has at least the following beneficial effects:

[0050] The protective layer can provide protection for the hose and the skeleton layer, and because the steel wire of the protective layer is generally thinner and only serves to protect the hose and the skeleton layer, its weight can be ignored. The skeleton layer can be designed with different structures and materials, which can greatly reduce the weight of the fracturing hose. When designing the pipe body, if a single material is used, the pressure design margin is large, which will cause waste. In order to achieve the best pressure-bearing structure design, the skeleton layer can be selected, designed and adjusted, thereby reducing weight and reducing costs.

[0051] The hose body structure of the present invention, other advantages, objectives and features of the present invention will be partially reflected through the following description, and will also be partially understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0053] Figure 1 This is a schematic diagram of the hose body structure of the present invention (part 1).

[0054] Figure 2 This is a schematic diagram of the hose body structure described in the present invention (part 2).

[0055] Figure 3 This is a schematic diagram of the hose body structure described in the present invention (part 3).

[0056] Figure 4 Schematic diagram of the hose body structure of the present invention (part 4).

[0057] Figure 5 This is a schematic diagram of the hose body structure described in the present invention (part 5).

[0058] Figure 6 This is a schematic diagram of the hose body structure described in the present invention (part six).

[0059] Figure 7 Schematic diagram of the hose body structure of the present invention (part seven).

[0060] Figure 8 Schematic diagram of the hose body structure of the present invention (part eight).

[0061] Fig. 9 Schematic diagram of the hose body structure of the present invention (part 9).

[0062] Fig.10 Schematic diagram of the hose body structure of the present invention (part 10).

[0063] Fig.11 Schematic diagram of the hose body structure of the present invention (part 11).

[0064] Fig.12 Schematic diagram of the hose body structure of the present invention (part 12).

[0065] Fig.13 This is a schematic diagram of the hose body structure described in the present invention (part thirteen).

[0066] Fig.14 Schematic diagram of the hose body structure of the present invention (fourteen).

[0067] In the figure: 1 inner rubber layer, 2 outer rubber layer, 3 skeleton layer, 4 protective layer. DETAILED DESCRIPTION

[0068] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0069] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0070] like Figure 1-Figure 14 As shown, the present invention provides a hose body structure, comprising: an inner rubber layer 1, an outer rubber layer 2, and a skeleton layer 3 arranged between the inner rubber layer 1 and the outer rubber layer 2. The inner rubber layer 1 is arranged on the outer wall of the hose. Two protective layers 4 are arranged between the inner rubber layer 1 and the skeleton layer 3, and between the skeleton layer 3 and the outer rubber layer 2. An interlayer is arranged between two adjacent protective layers 4 and between the protective layer 4 and the skeleton layer 3. The interlayer is usually a rubber product. The protective layer 4 is arranged on the outer wall of the hose or the interlayer of the skeleton layer 3, as shown in FIG. Figure 1-14As shown. The skeleton layer 3 is composed of a winding structure layer A and a braided structure layer B, wherein A≥0, B≥0, A+B≥1, the winding structure is a structure wound on the interlayer along the axial direction of the hose, and the braided structure is also wound on the interlayer along the axial direction of the hose, and interlayers are arranged between each layer of the winding structure, between the winding structure and the adjacent braided structure, and between each layer of the braided structure. The winding directions of the two adjacent winding structures are opposite. The winding directions of the two adjacent braided structures are opposite, that is, the directions of the odd and even layers of the winding structure are opposite, and the directions of the odd and even layers of the braided structure are also opposite. The winding structure and the braided structure are both made of any one of steel wire, steel wire rope, aramid, carbon fiber, or any combination of multiple items. That is, if E represents steel wire and G represents steel wire rope, taking four layers as an example, the combination can be expressed 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. Depending on the choice of winding structure and braiding structure (only winding structure, or only braiding structure, or a combination of winding structure and braiding structure), different materials (for example, only steel wire, only steel wire rope, only aramid, only carbon fiber, a combination of steel wire and wire rope, a combination of aramid and steel wire, etc.), and different numbers of layers (the number of winding structure layers A and the number of braiding structure layers B can be the same or different), the combination methods can be varied, thereby increasing the flexibility of the pipe body while enhancing the rigidity of the pipe body, and adjusting the design of different structures for the requirements of the fracturing hose according to different working conditions (some require a harder hose, some require a softer hose). The protective layer 4 can provide protection for the hose and the skeleton layer 3, and because the steel wire of the protective layer 4 is generally thin and only serves to protect the hose and the skeleton layer 3, its weight can be ignored. The skeleton layer 3 can be designed with different structures and materials, which can greatly reduce the weight of the fracturing hose. When designing the pipe body, if a single material is used, the margin of the pressure design is large, which will cause waste. In order to achieve the best pressure-bearing structure design, the present application can select, design and adjust the material of the skeleton layer 3, thereby reducing weight and reducing costs.

[0071] For example, if the blasting pressure required by the customer is 100Mpa, according to the existing technology using a single material, 6 layers of steel wire rope are required, which is 120MPa after calculation, which is too much margin. If only 4 layers are used, it is 90MPa, which is not enough. However, the skeleton layer 3 of the present application can use a structural combination of four layers of steel wire rope and two layers of steel wire to meet customer needs.

[0072] Taking the steel wire rope as an example, in order to improve the blasting pressure of the present application, a fracturing hose reinforced by multi-layer braiding or multi-layer winding is used. When winding, the winding angle of the steel wire rope needs to be calculated. In this embodiment, the braided layer refers to one or two combinations of the winding structure or the braided structure, and the axial deformation coordination equation of the braided layer is:

[0073]

[0074] —Deformation of the first layer of steel wire under pressure;

[0075] —Deformation of the wire in the nth layer under pressure;

[0076] —1st layer winding angle;

[0077] — winding angle of the nth layer;

[0078] —Balance angle of the first winding layer under pressure;

[0079] —Equilibrium angle of the nth winding layer under pressure;

[0080] —When calculating the winding structure, n is the number of layers A of the winding structure; when calculating the braided structure, n is the number of layers B of the braided structure.

[0081] The radial displacement coordination equations are:

[0082]

[0083] in,

[0084]

[0085]

[0086] —First layer balance and winding diameter (mm);

[0087] —Balance and winding diameter of the nth layer (mm).

[0088] The identical coordination equation for the contribution of the axial and circumferential components of tension to the bearing pressure is:

[0089]

[0090] — Circumferential component pressure contribution function;

[0091] —Axial component pressure contribution function;

[0092] Among them, the circumferential pressure contribution function of the nth layer is:

[0093]

[0094] The contribution function of the axial pressure of the nth layer is:

[0095]

[0096] The circumferential force of the nth layer is:

[0097]

[0098] The axial force of the nth layer is:

[0099]

[0100] The balance pitch of the nth layer is:

[0101]

[0102] The diameter of the nth layer in equilibrium is:

[0103]

[0104] —Wire rope diameter (mm);

[0105] —Tensile strength of steel wire rope (N);

[0106] —Total number of steel wire ropes in the nth layer.

[0107] The zero centering torque condition equation is:

[0108]

[0109] 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, so it is assumed that the sum of the torques is equal to zero.

[0110]

[0111] is an unknown number;

[0112]

[0113] It is a known quantity. In the present invention, the winding angle of the multi-layer rope is very important for the design of the fracturing hose. Therefore, during the production process, the winding angle of the braided layer should strictly comply with the requirements of the above formula.

[0114] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0115] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0116] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A hose body structure, characterized in that: include: The hose is composed of an inner rubber layer (1), an outer rubber layer (2), and a skeleton layer (3) arranged between the inner rubber layer (1) and the outer rubber layer (2); the inner rubber layer (1) is arranged on the outer wall of the hose; two protective layers (4) are arranged between the inner rubber layer (1) and the skeleton layer (3), and between the skeleton layer (3) and the outer rubber layer (2); and an interlayer is arranged between two adjacent protective layers (4) and between the protective layer (4) and the skeleton layer (3); The skeleton layer (3) is composed of a layer A of winding structure and a layer B of braided structure, wherein A≥0, B≥0, A+B≥1, and a spacer is provided between each layer of winding structure, between the winding structure and the adjacent braided structure, and between each layer of braided structure; The axial deformation coordination equation of the winding structure or the braided structure is: —The deformation of the material used in the first layer of the wound or braided structure under pressure; —The deformation of the material used in the nth layer of the wound or braided structure under pressure; —1st layer winding angle; — winding angle of the nth layer; —Balance angle of the first winding layer under pressure; —Equilibrium angle of the nth winding layer under pressure; —When calculating the winding structure, n is the number of layers A of the winding structure; when calculating the braided structure, n is the number of layers B of the braided structure; The radial displacement coordination equations of the winding structure or the braided structure are: in, —First layer balance and winding diameter (mm); —Balance and winding diameter of the nth layer (mm); The identical coordination equation for the contribution of the axial and circumferential components of the tension of the winding structure or braided structure to the pressure is: — Circumferential component pressure contribution function; —Axial component pressure contribution function; Among them, 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: —Diameter of the material used for the wound or braided structure (mm); —Tensile strength of materials used in wound or braided structures (N); —The total number of materials used in the nth layer of wound or braided structure; The zero centering torque condition equation of the winding structure or braided structure is: Since the odd-numbered layers and the even-numbered layers are wound in opposite directions, the torques generated by the tension on the axis of the hose are different, so it is assumed that the sum of the torques is equal to zero.

2. The hose body structure according to claim 1, characterized in that: The protective layer (4) is arranged on the outer wall of the hose or on the partition layer of the skeleton layer (3).

3. The hose body structure according to claim 1, characterized in that: The winding directions of two adjacent winding structures are opposite.

4. The hose body structure according to claim 1, characterized in that: The winding directions of two adjacent braided structures are opposite.

5. The hose body structure according to claim 1, characterized in that: The skeleton layer (3) is made of one or a combination of any number of steel wires, steel ropes, aramid and carbon fibers.

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