A special-shaped cable and a photoelectric hybrid cable

Abstract

The present invention belongs to the field of cables, and in particular, relates to a special-shaped cable, comprising a first outer sheath, two first electrical units, two second electrical units and a first reinforcement member, characterized in that the middle parts of the upper and lower sides of the main body of the first outer sheath are recessed inward to form two second cavities, in which a second electrical unit is arranged, and each recess is connected to two arc-shaped limiting components, a first cavity is formed inside the limiting component, in which a first electrical unit is arranged, the outer walls of the two limiting components corresponding to the same side are connected, and together with the limiting components, a reinforcement member cavity is formed, the first reinforcement member is located in the reinforcement member cavity, and two inflection points G are formed on the upper and lower sides of the first outer sheath main body corresponding to each second cavity. The present invention has the advantages of simple structure, low cost, high production efficiency, good heat dissipation performance, good pressure resistance, long service life, etc. The present invention also discloses a special-shaped optoelectronic hybrid cable.

Description

Technical Field

[0001] The invention belongs to the field of cables, and in particular relates to a special-shaped cable and a photoelectric hybrid cable. Background Art

[0002] With the large-scale promotion of domestic 5G construction, the demand for optical cables is increasing, and operators have increasingly stringent requirements on the water permeability performance of optical cables.

[0003] In the prior art, CN210052571U discloses an indoor optoelectronic hybrid cable, which has a protective layer, two electrical units and multiple optical communication components; the characteristic is that the protective layer is composed of a protective layer body and an isolation strip, an independent first cavity and two independent second cavities are formed inside the protective layer body, the first cavity and the second cavity are isolated by the isolation strip, the outer edge of the protective layer body is an octagon, four of which are straight edges, and the other four edges between the above four edges are arc-shaped edges recessed inward, the first cavity is in a shape with large ends at the upper and lower ends and a small middle part, and the diameter of the electrical unit is larger than the minimum width in the middle of the first cavity. The above prior art has the problem that the optoelectronic hybrid cable has poor compressive performance. Summary of the invention

[0004] To solve the above problems, the purpose of the present invention is to disclose a special-shaped cable and a photoelectric hybrid cable, which are achieved by adopting the following technical solutions.

[0005] A special-shaped cable, comprising a first outer sheath, two first electrical units, two second electrical units and a first reinforcement member, wherein the first electrical unit is composed of a first conductor and a first protective layer extruded outside the first conductor, and the second electrical unit is composed of a second conductor and a second protective layer extruded outside the second conductor, characterized in that the first outer sheath is composed of a first outer sheath body, the middle parts of the upper and lower sides of the first outer sheath body are recessed inward to form two second cavities, each of which is provided with a second electrical unit, and each recess is connected to two arc-shaped limiting components, and a second limiting component is formed inside A cavity, each first cavity is provided with a first electric unit, the shortest distance between the end of the limiting component and the first outer protective layer body is smaller than the outer diameter of the first electric unit, so as to prevent the first electric unit from escaping from the limiting component, the outer walls of the two limiting components corresponding to the same side are connected, and together with the limiting component, a reinforcement cavity is formed, and two inflection points G are formed on the upper and lower sides of the first outer protective layer body corresponding to each second cavity, and the two inflection points G on the same side and the connecting parts of the two limiting components on the same side fix the second electric unit, so as to reduce the contact area between the first outer protective layer body and the second electric unit, and is beneficial to the rapid dissipation of internal heat when the second electric unit is working.

[0006] The above-mentioned special-shaped cable is characterized in that the second protective layer material is polyvinyl chloride or high-density polyethylene or medium-density polyethylene or low-density polyethylene.

[0007] The above-mentioned special-shaped cable is characterized in that the second conductor material is copper or aluminum.

[0008] A special-shaped optoelectronic hybrid cable, comprising a first outer sheath, two first electrical units, two optical communication components and a first reinforcement member, wherein the first electrical unit is composed of a first conductor and a first protective layer extruded outside the first conductor, and characterized in that the first outer sheath is composed of a first outer sheath body, wherein the middle parts of the upper and lower sides of the first outer sheath body are recessed inward to form two second cavities, wherein each second cavity is provided with an optical communication component, and each recess is connected to two arc-shaped limiting components, wherein a first cavity is formed inside the limiting component, and each first cavity is provided with a Based on the first electric unit, the shortest distance between the end of the limiting component and the first outer protective layer body is less than the outer diameter of the first electric unit, so as to prevent the first electric unit from detaching from the limiting component. The outer walls of the two limiting components corresponding to the same side are connected to form a reinforcement component cavity together with the limiting component. Two inflection points G are formed on the upper and lower sides of the first outer protective layer body corresponding to each second cavity. The two inflection points G on the same side and the connecting parts of the two limiting components on the same side fix the second electric unit, so as to reduce the contact area between the first outer protective layer body and the second electric unit, and is beneficial to the rapid dissipation of internal heat when the second electric unit is working.

[0009] The above-mentioned special-shaped optoelectronic hybrid cable is characterized in that the optical communication component is composed of a loose tube and at least one optical fiber or optical fiber ribbon arranged in the loose tube, and the optical fiber ribbon is formed by combining at least two optical fibers.

[0010] The above-mentioned special-shaped optoelectronic hybrid cable is characterized in that the optical fiber material is G.652 type, G.653 type, G.654 type, G.655 type, G.656 type, G.657 type, A1a type, A1b type or A1c type.

[0011] The above-mentioned special-shaped optoelectronic hybrid cable is characterized in that the loose tube 61 is made of polybutylene terephthalate or modified polypropylene.

[0012] When optical fiber ribbons are used, the core density of the optical-electric hybrid cable is increased, thereby improving the transmission capacity of optical signals.

[0013] The above-mentioned special-shaped cable or optoelectronic hybrid cable is characterized in that a second outer sheath is provided outside the first outer sheath, and a second reinforcement member is provided in the gap formed by the first outer sheath and the recessed part of the first outer sheath.

[0014] The above-mentioned special-shaped cable or optoelectronic hybrid cable is characterized in that the material of the second reinforcement member is phosphated steel wire or stainless steel wire or glass fiber reinforced plastic rod.

[0015] The above-mentioned special-shaped cable or optoelectronic hybrid cable is characterized in that the second outer sheath material is polyvinyl chloride or high-density polyethylene or medium-density polyethylene or low-density polyethylene or flame-retardant polyolefin or nylon.

[0016] The above-mentioned special-shaped cable or optoelectronic hybrid cable has a second outer sheath and a second reinforcement member, which improves the tensile strength of the cable and enhances the protection of the first electrical unit and the second electrical unit inside the cable.

[0017] The above-mentioned special-shaped cable or optoelectronic hybrid cable is characterized in that the reinforcement cavity is non-circular, and the outer wall of the first reinforcement is completely in close contact with the inner wall of the reinforcement cavity, thereby improving the anti-twisting performance of the cable.

[0018] The above-mentioned special-shaped cable or optoelectronic hybrid cable is characterized in that the first conductive material is copper or aluminum.

[0019] The above-mentioned special-shaped cable or optoelectronic hybrid cable is characterized in that the first outer sheath material is polyvinyl chloride or high-density polyethylene or medium-density polyethylene or low-density polyethylene or flame-retardant polyolefin or nylon.

[0020] In the present invention, the first electrical unit and the second electrical unit and the optical communication component are isolated from each other, and there is a large gap between the first electrical unit, the second electrical unit or the optical communication component, and the main body of the first outer sheath, which improves the heat dissipation efficiency of the cable or the optoelectronic hybrid cable, reduces the heat generation of the cable or the optoelectronic hybrid cable, indirectly improves the current carrying capacity of the cable or the optoelectronic hybrid cable, indirectly prolongs the thermal aging time of the first outer sheath, and prolongs the service life of the cable or the optoelectronic hybrid cable; the first electrical unit and the second electrical unit or the optical communication component do not need to be fixed with materials such as yarn, thus saving material costs, storage space and material management costs, reducing production processes, improving production efficiency, and saving labor costs; when the second reinforcement is under pressure, the pressure on the first electrical unit and the second electrical unit or the optical communication component can be reduced by the elasticity of the first outer sheath itself, thereby improving the compressive strength of the cable or the optoelectronic hybrid cable.

[0021] Therefore, the present invention has the beneficial effects of simple structure, low cost, high production efficiency, good heat dissipation performance, good pressure resistance, long service life, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1 of the present invention.

[0023] Figure 2This is a schematic diagram of the structure of the first outer protective layer of the present invention.

[0024] Figure 3 This is a structural diagram of Example 2 of the present invention.

[0025] Figure 4 This is a structural diagram of Example 3 of the present invention.

[0026] Figure 5 This is a structural schematic diagram of Example 4 of the present invention.

[0027] In the figure: 1. first outer sheath, 11. first outer sheath body, 12. limiting component, 13. first cavity, 14. reinforcement component cavity, 15. second cavity, 2. first electrical unit, 21. first protective layer, 22. first conductor, 3. second electrical unit, 31. second protective layer, 32. second conductor, 4. first reinforcement component, 5. second reinforcement component, 6. optical communication component, 61. loose tube, 62. optical fiber, 63. optical fiber ribbon, 7. second outer sheath, G. inflection point. DETAILED DESCRIPTION

[0028] Example 1

[0029] Please see Figure 1 and Figure 2A special-shaped cable comprises a first outer sheath 1, two first electrical units 2, two second electrical units 3 and a first reinforcement member 4, wherein the first electrical unit 2 is composed of a first conductor 22 and a first protective layer 21 extruded outside the first conductor 22, and the second electrical unit 3 is composed of a second conductor 32 and a second protective layer 31 extruded outside the second conductor 32, characterized in that the first outer sheath 1 is composed of a first outer sheath body 11, the middle parts of the upper and lower sides of the first outer sheath body 11 are recessed inward to form two second cavities 15, each second cavity 15 is provided with a second electrical unit 3, each recess is connected to two arc-shaped limiting components 12, a first cavity 13 is formed inside the limiting component 12, each first cavity 13 is provided with a first electrical unit 2, the limiting component The shortest distance between the end of the component 12 and the first outer sheath body 11 is less than the outer diameter of the first electrical unit 2, so as to prevent the first electrical unit 2 from escaping from the limiting component 12. The outer walls of the two corresponding limiting components 12 on the same side are connected, and together with the limiting component 12, a reinforcement component cavity 14 is formed. The first reinforcement component 4 is located in the reinforcement component cavity 14. Two inflection points G are formed on the upper and lower sides of the first outer sheath body 11 corresponding to each second cavity 15. The two inflection points G on the same side and the connecting parts of the two limiting components 12 on the same side fix the second electrical unit 3, so as to reduce the contact area between the first outer sheath body 11 and the second electrical unit 3, and to facilitate the rapid dissipation of internal heat when the second electrical unit 3 is working. The reinforcement component cavity 14 is non-circular, and the outer wall of the first reinforcement component 4 is completely in close contact with the inner wall of the reinforcement component cavity 14, so as to improve the torsion resistance of the cable.

[0030] Example 2

[0031] Please see Figure 3 and Figure 2, a special-shaped cable, comprising a first outer sheath 1, two first electrical units 2, two second electrical units 3 and a first reinforcement member 4, wherein the first electrical unit 2 is composed of a first conductor 22 and a first protective layer 21 extruded outside the first conductor 22, and the second electrical unit 3 is composed of a second conductor 32 and a second protective layer 31 extruded outside the second conductor 32, characterized in that the first outer sheath 1 is composed of a first outer sheath body 11, the middle parts of the upper and lower sides of the first outer sheath body 11 are recessed inward to form two second cavities 15, each second cavity 15 is provided with a second electrical unit 3, each recess is connected to two arc-shaped limiting components 12, a first cavity 13 is formed inside the limiting component 12, each first cavity 13 is provided with a first electrical unit 2, and the shortest distance between the end of the limiting component 12 and the first outer sheath body 11 is less than the first electrical unit The outer diameter of element 2 prevents the first electrical unit 2 from escaping from the limiting component 12. The outer walls of the two limiting components 12 corresponding to the same side are connected, and together with the limiting component 12, a reinforcement component cavity 14 is formed. The first reinforcement component 4 is located in the reinforcement component cavity 14. The upper and lower sides of the first outer sheath body 11 corresponding to each second cavity 15 form two inflection points G. The two inflection points G on the same side and the connecting parts of the two limiting components 12 on the same side fix the second electrical unit 3, reducing the contact area between the first outer sheath body 11 and the second electrical unit 3, which is beneficial to the rapid dissipation of internal heat when the second electrical unit 3 is working. The reinforcement component cavity 14 is non-circular, and the outer wall of the first reinforcement component 4 is completely in close contact with the inner wall of the reinforcement component cavity 14, thereby improving the torsion resistance of the cable. A second outer sheath 7 is also provided outside the first outer sheath 1, and a second reinforcement component 5 is provided in the gap formed by the first outer sheath 1 and the recessed part of the first outer sheath 1.

[0032] In this embodiment, a second outer sheath 7 and a second reinforcement member 5 are added to improve the tensile strength of the cable and enhance the protection of the first electrical unit 2 and the second electrical unit 3 inside the cable.

[0033] The special-shaped cable described in the above-mentioned embodiment 1 or embodiment 2 is characterized in that the material of the second protective layer 31 is polyvinyl chloride or high-density polyethylene or medium-density polyethylene or low-density polyethylene.

[0034] The special-shaped cable described in the above-mentioned embodiment 1 or embodiment 2 is characterized in that the material of the second conductor 32 is copper or aluminum.

[0035] Example 3

[0036] Please see Figure 4 and Figure 2A special-shaped optoelectronic hybrid cable, comprising a first outer sheath 1, two first electrical units 2, two optical communication components 6 and a first reinforcement member 4, wherein the first electrical unit 2 is composed of a first conductor 22 and a first protective layer 21 extruded outside the first conductor 22, and the optical communication component 6 is composed of a loose tube 61 and at least one optical fiber 62 arranged in the loose tube 61, characterized in that the first outer sheath 1 is composed of a first outer sheath body 11, the middle parts of the upper and lower sides of the first outer sheath body 11 are recessed inward to form two second cavities 15, each second cavity 15 is provided with an optical communication component 6, each recess is connected to two arc-shaped limiting components 12, a first cavity 13 is formed inside the limiting component 12, each first cavity 13 is provided with a first electrical unit 2, and the shortest distance between the end of the limiting component 12 and the first outer sheath body 11 is less than the first electrical unit 2, preventing the first electrical unit 2 from escaping from the limiting component 12, the outer walls of the two limiting components 12 corresponding to the same side are connected, and together with the limiting component 12 form a reinforcement component cavity 14, the first reinforcement component 4 is located in the reinforcement component cavity 14, and the upper and lower sides of the first outer sheath body 11 corresponding to each second cavity 15 form two inflection points G, the two inflection points G on the same side and the connecting parts of the two limiting components 12 on the same side fix the second electrical unit 3, reducing the contact area between the first outer sheath body 11 and the second electrical unit 3, which is beneficial to the rapid dissipation of internal heat when the second electrical unit 3 is working, the reinforcement component cavity 14 is non-circular, and the outer wall of the first reinforcement component 4 is completely close to the inner wall of the reinforcement component cavity 14, so as to improve the torsion resistance of the cable, a second outer sheath 7 is also provided outside the first outer sheath 1, and a second reinforcement component 5 is provided in the gap formed by the first outer sheath 1 and the recess of the first outer sheath 1.

[0037] In the above embodiment, an optical communication component 6 is added to transmit optical signals and electrical signals simultaneously.

[0038] Example 4

[0039] Please see Figure 5 and Figure 2, a special-shaped optoelectronic hybrid cable, comprising a first outer sheath 1, two first electrical units 2, two optical communication components 6 and a first reinforcement member 4, wherein the first electrical unit 2 is composed of a first conductor 22 and a first protective layer 21 extruded outside the first conductor 22, and the optical communication component 6 is composed of a loose tube 61 and at least one optical fiber ribbon 63 arranged in the loose tube 61, characterized in that the first outer sheath 1 is composed of a first outer sheath body 11, the middle parts of the upper and lower sides of the first outer sheath body 11 are recessed inward to form two second cavities 15, each second cavity 15 is provided with an optical communication component 6, each recess is connected to two arc-shaped limiting components 12, a first cavity 13 is formed inside the limiting component 12, and a first electrical unit 2 is arranged in each first cavity 13, and the shortest distance between the end of the limiting component 12 and the first outer sheath body 11 is less than the outer diameter of the first electrical unit 2, so as to prevent the first electrical Unit 2 is separated from the limiting component 12, and the outer walls of the two limiting components 12 corresponding to the same side are connected, and together with the limiting component 12, a reinforcement component cavity 14 is formed, and the first reinforcement component 4 is located in the reinforcement component cavity 14, and the upper and lower sides of the first outer sheath body 11 corresponding to each second cavity 15 form two inflection points G, and the two inflection points G on the same side and the connecting parts of the two limiting components 12 on the same side fix the second electrical unit 3, thereby reducing the contact surface between the first outer sheath body 11 and the second electrical unit 3, which is beneficial to the rapid dissipation of internal heat when the second electrical unit 3 is working. The reinforcement component cavity 14 is non-circular, and the outer wall of the first reinforcement component 4 is completely in close contact with the inner wall of the reinforcement component cavity 14, thereby improving the torsion resistance of the cable. A second outer sheath 7 is also provided outside the first outer sheath 1, and a second reinforcement component 5 is provided in the gap formed by the first outer sheath 1 and the recessed part of the first outer sheath 1, and the optical fiber ribbon 63 is formed by at least two optical fibers 62 being connected in parallel.

[0040] In this embodiment, the fiber core density of the optical-electrical hybrid cable is increased, thereby improving the transmission capacity of the optical signal.

[0041] The special-shaped optoelectronic hybrid cable described in the above-mentioned embodiments 2 to 4 is characterized in that the material of the optical fiber 62 is G.652 type, G.653 type, G.654 type, G.655 type, G.656 type, G.657 type, A1a type, A1b type or A1c type.

[0042] The special-shaped optoelectronic hybrid cable described in the above-mentioned Embodiments 2 to 4 is characterized in that the loose tube 61 is made of polybutylene terephthalate or modified polypropylene.

[0043] The special-shaped cable or optoelectronic hybrid cable described in the above-mentioned embodiments 2 to 4 is characterized in that the material of the second outer sheath 7 is polyvinyl chloride or high-density polyethylene or medium-density polyethylene or low-density polyethylene or flame-retardant polyolefin or nylon.

[0044] The special-shaped cable or optoelectronic hybrid cable described in the above-mentioned embodiments 2 to 4 is characterized in that the material of the second reinforcement member 5 is phosphated steel wire or stainless steel wire or glass fiber reinforced plastic rod.

[0045] The special-shaped cable or optoelectronic hybrid cable described in any of the above embodiments is characterized in that the material of the first reinforcement member 4 is phosphated steel wire or stainless steel wire or glass fiber reinforced plastic rod.

[0046] The special-shaped cable or optoelectronic hybrid cable described in any of the above embodiments is characterized in that the material of the first protective layer 21 is polyvinyl chloride, high-density polyethylene, medium-density polyethylene, low-density polyethylene, flame-retardant polyolefin or nylon.

[0047] The special-shaped cable or optoelectronic hybrid cable described in any of the above embodiments is characterized in that the material of the first conductor 22 is copper or aluminum.

[0048] The special-shaped cable or optoelectronic hybrid cable described in any of the above embodiments is characterized in that the material of the first outer sheath 1 is polyvinyl chloride, high-density polyethylene, medium-density polyethylene, low-density polyethylene, flame-retardant polyolefin or nylon.

[0049] In the present invention, the first electrical unit 2 and the second electrical unit 3 and the optical communication component 6 are isolated from each other, and there is a large gap between the first electrical unit 2, the second electrical unit 3 or the optical communication component 6, and the first outer sheath body 11, which improves the heat dissipation efficiency of the cable or optoelectronic hybrid cable, reduces the heat generation of the cable or optoelectronic hybrid cable, indirectly improves the current carrying capacity of the cable or optoelectronic hybrid cable, indirectly prolongs the thermal aging time of the first outer sheath 1, and prolongs the service life of the cable or optoelectronic hybrid cable; the first electrical unit 2 and the second electrical unit 3 or the optical communication component 6 do not need to be fixed with materials such as yarn, thereby saving material costs, storage space and material management costs, reducing production processes, improving production efficiency, and saving labor costs; when the second reinforcement 5 is subjected to pressure, the pressure on the first electrical unit 2 and the second electrical unit 3 or the optical communication component 6 can be reduced by the elasticity of the first outer sheath 1 itself, thereby improving the compressive strength of the cable or optoelectronic hybrid cable.

[0050] The invention solves the problem of poor compression resistance of the electric cable or the photoelectric hybrid cable in the prior art.

[0051] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A special-shaped cable, comprising a first outer sheath (1), two first electrical units (2), two second electrical units (3) and a first reinforcement member (4), wherein the first electrical unit (2) is composed of a first conductor (22) and a first protective layer (21) extruded outside the first conductor (22), and the second electrical unit (3) is composed of a second conductor (32) and a second protective layer (31) extruded outside the second conductor (32), characterized in that: The first outer sheath (1) is composed of a first outer sheath body (11); the middle parts of the upper and lower sides of the first outer sheath body (11) are recessed inward to form two second cavities (15); a second electrical unit (3) is arranged in each second cavity (15); each recess is connected to two arc-shaped limiting components (12); a first cavity (13) is formed inside the limiting components (12); a first electrical unit (2) is arranged in each first cavity (13); the shortest distance between the end of the limiting component (12) and the first outer sheath body (11) is less than the outer diameter of the first electrical unit (2); the outer walls of the two limiting components (12) corresponding to the same side are connected to form a reinforcement component cavity (14) together with the limiting component (12) on the other side; the first reinforcement component (4) is located in the reinforcement component cavity (14); and two inflection points G are formed on the upper and lower sides of the first outer sheath body (11) corresponding to each second cavity (15); The material of the second protective layer (31) is polyvinyl chloride, high-density polyethylene, medium-density polyethylene or low-density polyethylene; The second conductor (32) is made of copper or aluminum.

2. A special-shaped cable according to claim 1, characterized in that: A second outer sheath (7) is provided outside the first outer sheath (1), and a second reinforcing member (5) is provided in a gap formed by the first outer sheath (1) and the recessed portion of the first outer sheath (1).

3. A special-shaped cable according to claim 2, characterized in that: The reinforcement component cavity (14) is non-circular, and the outer wall of the first reinforcement component (4) is completely in close contact with the inner wall of the reinforcement component cavity (14).

4. A special-shaped optical-electrical hybrid cable, comprising a first outer sheath (1), two first electrical units (2), two optical communication components (6) and a first reinforcement member (4), wherein the first electrical unit (2) is composed of a first conductor (22) and a first protective layer (21) extruded outside the first conductor (22), characterized in that: The first outer sheath (1) is composed of a first outer sheath body (11); the middle parts of the upper and lower sides of the first outer sheath body (11) are recessed inward to form two second cavities (15); an optical communication component (6) is arranged in each second cavity (15); each recess is connected to two arc-shaped limiting components (12); a first cavity (13) is formed inside the limiting components (12); a first electrical unit (2) is arranged in each first cavity (13); the shortest distance between the end of the limiting component (12) and the first outer sheath body (11) is less than the outer diameter of the first electrical unit (2); the outer walls of the two limiting components (12) corresponding to the same side are connected to form a reinforcement component cavity (14) together with the limiting component (12) on the other side; and two inflection points G are formed on the upper and lower sides of the first outer sheath body (11) corresponding to each second cavity (15); The optical communication component (6) is composed of a loose tube (61) and at least one optical fiber (62) or an optical fiber ribbon (63) arranged in the loose tube (61), wherein the optical fiber ribbon (63) is formed by combining at least two optical fibers (62); the material of the loose tube (61) is polybutylene terephthalate or modified polypropylene; The material of the optical fiber (62) is G.652 type, G.653 type, G.654 type, G.655 type, G.656 type, G.657 type, A1a type, A1b type or A1c type.

5. The special-shaped optical-electric hybrid cable according to claim 4, characterized in that A second outer sheath (7) is provided outside the first outer sheath (1), and a second reinforcing member (5) is provided in a gap formed by the first outer sheath (1) and the recess of the first outer sheath (1).

6. The special-shaped optical-electric hybrid cable according to claim 5, characterized in that The reinforcement component cavity (14) is non-circular, and the outer wall of the first reinforcement component (4) is completely in close contact with the inner wall of the reinforcement component cavity (14).

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