Flame-retardant shielding high-temperature-resistant cable

Abstract

The invention relates to the technical field of cables, and particularly discloses a flame-retardant shielding high-temperature-resistant cable which comprises an inner-layer framework, the inner-layer framework comprises a central pipe, a plurality of partition pieces are annularly and uniformly distributed on the outer side of the central pipe, a wiring cavity is formed between every two adjacent partition pieces, and a cable inner core is arranged in each wiring cavity; the outer side of the inner-layer framework is wrapped by the outer shielding layer, the outer side of the outer shielding layer is wrapped by the flame-retardant layer, the outer side of the flame-retardant layer is wrapped by the armor layer, the outer side of the armor layer is wrapped by the outer insulating layer, and the outer side of the outer insulating layer is provided with the protective layer. According to the invention, the interior of the cable is divided into a plurality of wiring cavities through the inner-layer skeleton, and the cable inner cores are respectively arranged in the wiring cavities to realize separation, so that heat sources are separated, and heat accumulation caused by mutual influence is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a flame-retardant, shielded, high-temperature-resistant cable. Background Art

[0002] A cable is usually a rope-like cable made up of several or several groups of wires twisted together. Each group of wires is insulated from each other and often twisted around a center wire. The entire cable is covered with a highly insulating covering. Its main function is to transmit electricity or information from one place to another.

[0003] Chinese patent CN114038616B discloses a high temperature resistant flame retardant cable, which is sequentially provided with a conductor layer, an insulating layer, a shielding layer and a sheath; the conductor layer includes a conductor and a conductor shield surrounding the conductor; the insulating layer includes an insulating member and an insulating shield; the shielding layer includes a modified aluminum foil Mylar tape; the sheath includes an inner sheath, an armor layer (5) and an outer sheath; wherein the modified aluminum foil Mylar tape is sequentially provided with aluminum foil, PET and modified aluminum foil. The invention improves the composition of the cable part structure, while improving the cable quality, it also ensures that the cable is as thick as a traditional cable, avoids the isolation of the cable and the thickening of the protective layer due to the addition of various materials, and avoids the safety impact caused thereby.

[0004] The conductor layers of the above technical solution are gathered together, which has disadvantages in terms of heat dissipation and flame retardancy. Therefore, a flame retardant, shielded, and high temperature resistant cable with a separated arrangement is required. Summary of the invention

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A flame-retardant, shielded, and high-temperature resistant cable, characterized in that it comprises an inner skeleton, the inner skeleton comprises a central tube, a plurality of partitions are evenly distributed in an annular shape on the outer side of the central tube, a wiring cavity is provided between two adjacent partitions, a cable core is provided in the wiring cavity, an outer shielding layer is provided on the outer side of the inner skeleton, a flame-retardant layer is provided on the outer side of the outer shielding layer, an armor layer is provided on the outer side of the flame-retardant layer, an outer insulating layer is provided on the outer side of the armor layer, and a protective layer is provided on the outer side of the outer insulating layer.

[0007] Preferably, the inner core of the cable comprises a wire core, an inner shielding layer is wrapped around the outer side of the wire core, and an inner insulating layer is arranged on the outer side of the inner shielding layer.

[0008] Preferably, the outer insulating layer and the inner insulating layer are made of soluble polytetrafluoroethylene or polyperfluoroethylene propylene or polyvinyl chloride.

[0009] Preferably, a steel wire is passed through the central tube.

[0010] Preferably, the outer shielding layer and the inner shielding layer are both woven from tinned copper wires.

[0011] Preferably, the flame retardant layer comprises a plurality of sleeves, a metal ring sheet is arranged between two adjacent sleeves, and the sleeves are composed of a non-woven fabric layer, a fire-resistant cloud tape layer, and a glass fiber layer from the inside to the outside.

[0012] Preferably, the armor layer is woven from galvanized steel wires.

[0013] Preferably, the protective layer is made of silicone rubber.

[0014] Preferably, the space in the wiring cavity outside the cable core is filled with a filler strip made of high temperature resistant material.

[0015] Preferably, the metal ring piece is woven from galvanized copper wire.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention divides the interior of the cable into multiple routing cavities through the inner layer skeleton, and the inner cores of the cable are arranged in each routing cavity to achieve separation, thereby isolating the heat source to prevent mutual influence and heat accumulation. The shielding layer and the armor layer of the present invention are connected by a metal ring sheet, so that the heat of the inner layer can be transferred to the outside in time, thereby improving the heat dissipation effect. In addition, the setting of the metal ring sheet can also play a role of separation and flame retardancy when the cable burns. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the inner core of the cable of the present invention; Figure 3 It is a cross-sectional view of the casing of the present invention; Figure 4 It is a schematic diagram of the partial structure of the flame retardant layer of the present invention.

[0018] In the figure: 1. Inner skeleton; 1-1. Center tube; 1-2. Separator; 1-3. Wiring cavity; 1-4. Steel wire; 2. Cable inner core; 2-1. Wire core; 2-2. Inner shielding layer; 2-3. Inner insulation layer; 3. Outer shielding layer; 4. Flame retardant layer; 4-1. Sleeve; 4-2. Metal ring; 4-11. Non-woven fabric layer; 4-12. Fire-resistant cloud layer; 4-13. Glass fiber layer; 5. Armor layer; 6. Outer insulation layer; 7. Protective layer; 8. Filling strips of high temperature resistant material. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0022] like Figure 1-4 As shown, in this embodiment, a flame-retardant shielded high-temperature resistant cable includes an inner skeleton 1, the inner skeleton 1 includes a central tube 1-1, a plurality of separators 1-2 are evenly distributed in an annular manner on the outer side of the central tube 1-1, a wiring cavity 1-3 is provided between two adjacent separators 1-2, a cable inner core 2 is provided in the wiring cavity 1-3, an outer shielding layer 3 is provided on the outer side of the inner skeleton 1, a flame-retardant layer 4 is provided on the outer side of the outer shielding layer 3, an armor layer 5 is provided on the outer side of the flame-retardant layer 4, an outer insulating layer 6 is provided on the outer side of the armor layer 5, and a protective layer 7 is provided on the outer side of the outer insulating layer 6. In this embodiment, the inner skeleton 1 is made of rubber.

[0023] In order to improve the shielding effect of the cable, in this embodiment, the cable inner core 2 includes a wire core 2-1, an inner shielding layer 2-2 is wrapped around the outer side of the wire core 2-1, and an inner insulating layer 2-3 is arranged outside the inner shielding layer 2-2.

[0024] In this embodiment, the outer insulating layer 6 and the inner insulating layers 2 - 3 are made of soluble polytetrafluoroethylene or polyperfluoroethylene propylene or polyvinyl chloride.

[0025] Soluble polytetrafluoroethylene (PFA) is a high-performance fluorine-containing polymer, which is a modified product of polytetrafluoroethylene (PTFE). Compared with PTFE, the biggest feature of PFA is that it can be dissolved under certain conditions, which gives it a unique advantage in processing performance. PFA inherits the excellent chemical stability, corrosion resistance, high temperature resistance and low friction coefficient of polytetrafluoroethylene.

[0026] Fluorinated ethylene propylene (FEP) is a fluorinated polymer, which is a copolymer of tetrafluoroethylene and hexafluoropropylene. This material combines many excellent properties of polytetrafluoroethylene (PTFE), such as excellent chemical stability, high temperature resistance, low friction coefficient, etc., while improving processing performance, etc., and is a high-performance engineering plastic. FEP is usually transparent or translucent granular or powdered. Its transparency is a significant feature. When made into films, pipes or other products, this transparency can provide good visibility, which is very advantageous in some application scenarios where internal conditions need to be observed, such as transparent pipes used in laboratories or some components of optical equipment. In terms of hardness, FEP is relatively soft and has good flexibility. This flexibility allows it to be formed in molds of different shapes and can adapt to a certain degree of bending and deformation during use. When making insulating sleeves for wires and cables, it can be well wrapped around the wires without breaking.

[0027] Polyvinyl chloride is a thermoplastic resin polymerized from vinyl chloride monomer (VCM). It is one of the most produced general-purpose plastics in the world. Due to its good chemical stability, corrosion resistance, mechanical properties and processability, it is widely used in many fields such as construction, chemical industry, electronics, medical treatment, packaging, etc. Polyvinyl chloride can change its properties by adding different additives, such as plasticizers, stabilizers, lubricants, etc., to meet various usage requirements.

[0028] In order to improve the rigidity and tensile strength of the cable, in this embodiment, a steel wire 1-4 is passed through the central tube 1-1.

[0029] In this embodiment, the outer shielding layer 3 and the inner shielding layer 2 - 2 are both woven from tinned copper wires.

[0030] In this embodiment, the flame retardant layer 4 includes a plurality of sleeves 4-1, a metal ring sheet 4-2 is arranged between two adjacent sleeves 4-1, and the sleeves 4-1 are composed of a non-woven fabric layer 4-11, a fire-resistant cloud layer 4-12, and a glass fiber layer 4-13 from inside to outside.

[0031] In this embodiment, the armor layer 5 is woven from galvanized steel wires 1-4.

[0032] In this embodiment, the protective layer 7 is made of silicone rubber.

[0033] In order to fix the position of the cable core 2 and improve the heat insulation and high temperature resistance capabilities, in this embodiment, the space outside the cable core 2 in the wiring cavity 1-3 is filled with a high temperature resistant material filler strip 8.

[0034] In order to improve the bending performance of the cable, in this embodiment, the metal ring piece 4-2 is woven from galvanized copper wires.

[0035] The working principle and beneficial effects of the above technical solution are: The present invention divides the interior of the cable into a plurality of wiring cavities 1-3 through the inner layer skeleton 1, and the cable inner core 2 is arranged in each wiring cavity 1-3 to achieve separation, thereby isolating the heat source to prevent mutual influence and heat accumulation. The shielding layer and the armor layer 5 of the present invention are connected by the metal ring sheet 4-2, so that the heat of the inner layer can be transferred to the outside in time, thereby improving the heat dissipation effect. In addition, the setting of the metal ring sheet 4-2 can also play a role of separation and flame retardancy when the cable burns.

[0036] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flame-retardant, shielded, high-temperature resistant cable, characterized in that: The invention comprises an inner skeleton (1), wherein the inner skeleton (1) comprises a central tube (1-1), a plurality of separators (1-2) are evenly distributed in an annular shape on the outer side of the central tube (1-1), a wiring cavity (1-3) is provided between two adjacent separators (1-2), a cable inner core (2) is provided in the wiring cavity (1-3), an outer shielding layer (3) is provided on the outer side of the inner skeleton (1), a flame retardant layer (4) is provided on the outer side of the outer shielding layer (3), an armor layer (5) is provided on the outer side of the flame retardant layer (4), an outer insulating layer (6) is provided on the outer side of the armor layer (5), and a protective layer (7) is provided on the outer side of the outer insulating layer (6).

2. The flame-retardant, shielded, high-temperature resistant cable according to claim 1, characterized in that: The cable inner core (2) comprises a wire core (2-1), the outer side of the wire core (2-1) is wrapped with an inner shielding layer (2-2), and the outer side of the inner shielding layer (2-2) is provided with an inner insulating layer (2-3).

3. The flame-retardant, shielded, high-temperature resistant cable according to claim 2, characterized in that: The outer insulating layer (6) and the inner insulating layer (2-3) are made of soluble polytetrafluoroethylene or polyperfluoroethylene propylene or polyvinyl chloride.

4. The flame-retardant, shielded, high-temperature resistant cable according to claim 1, characterized in that: A steel wire (1-4) is passed through the central tube (1-1).

5. The flame-retardant, shielded, high-temperature resistant cable according to claim 1, characterized in that: The outer shielding layer (3) and the inner shielding layer (2-2) are both woven from tinned copper wires.

6. The flame-retardant, shielded, high-temperature resistant cable according to claim 1, characterized in that: The flame retardant layer (4) comprises a plurality of sleeves (4-1), a metal ring sheet (4-2) being arranged between two adjacent sleeves (4-1), and the sleeves (4-1) are composed of a non-woven fabric layer (4-11), a fire-resistant cloud layer (4-12), and a glass fiber layer (4-13) from the inside to the outside.

7. The flame-retardant, shielded, high-temperature resistant cable according to claim 1, characterized in that: The armor layer (5) is woven from galvanized steel wires (1-4).

8. The flame-retardant, shielded, high-temperature resistant cable according to claim 1, characterized in that: The protective layer (7) is made of silicone rubber.

9. The flame-retardant, shielded, high-temperature resistant cable according to claim 1, characterized in that: The space in the wiring cavity (1-3) located outside the cable inner core (2) is filled with a high-temperature resistant material filler strip (8).

10. The flame-retardant, shielded, high-temperature resistant cable according to claim 1, characterized in that: The metal ring piece (4-2) is woven from galvanized copper wires.

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