Mineral insulated flexible fireproof cable

Abstract

The utility model relates to the technical field of cables, in particular to a mineral insulated flexible fireproof cable, which comprises a central tube and an outer sleeve layer, the outer surface of the central tube is fixedly connected with a plurality of partition plates, and a cable unit is arranged between every two partition plates. The cable has the advantages that the situation that local distribution of the filling layer is not uniform can be prevented, the central pipe and the partition plates are made of flexible rubber, the overall flexibility of the cable can be guaranteed, the filling layer formed by matching talc and aluminum oxide and talc can effectively reduce friction inside the cable due to the smooth and greasy characteristics and good insulation performance, and the cable is protected from being damaged. Therefore, the flexibility and bending performance of the cable are improved. And aluminum oxide provides excellent structural support and heat-resistant protection for the cable due to the characteristics of high hardness and high temperature resistance. Therefore, the mixed use of the two can integrate the advantages of the two, thereby not only ensuring the flexibility of the cable, but also enhancing the structural stability and heat resistance of the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a mineral insulated flexible fireproof cable. Background Art

[0002] Cable is a device for transmitting electric energy or signals. It is usually composed of several or several groups of wires. Each wire is insulated from each other and twisted around the center. The entire outer surface is covered with a highly insulating covering. It has the characteristics of internal power conduction and external insulation. It is mainly used for power transmission, communication, control signal transmission, and connecting various circuits and electrical equipment.

[0003] For example, a B1-class flame-retardant mineral insulated flexible fireproof cable with publication number CN211858233U has the following beneficial effects: the utility model can effectively improve the fireproof ability of the cable while ensuring the flexibility of the cable, the copper core conductor is a quasi-tightly compressed stranded conductor, and the mica layer is coated on the outer wall of the copper core conductor, which can effectively ensure the high temperature resistance and insulation of the cable, and the filling layer is coated on the outer wall of the three outer insulating layers, and the filling layer is a refractory mud filling layer, which can effectively improve the fireproof ability of the cable while ensuring the flexibility of the cable. The above-mentioned cable improves the fireproof performance of the cable by filling the refractory mud filling layer, but the filling layer directly wraps several cores. In actual use, as the cable is pulled and bent, the refractory mud is very easy to loosen, resulting in local uneven distribution, and sometimes gathers between several cores, which will reduce the overall fireproof performance of the cable. Therefore, a mineral insulated flexible fireproof cable is needed to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0005] Therefore, one purpose of the utility model is to provide a mineral insulated flexible fireproof cable to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0006] In order to achieve the above-mentioned objectives, an embodiment of one aspect of the utility model provides a mineral insulated flexible fire-resistant cable, including a central tube and an outer jacket layer, a plurality of partition plates are fixedly connected to the outer surface of the central tube, a cable unit is arranged between every two of the partition plates, the cable unit includes a conductive core, the outer surface of the conductive core is covered with an insulating layer, the outer surface of the insulating layer is covered with a heat-resistant layer, the inner wall of the outer jacket layer is sleeved with a shielding layer, the inner wall of the shielding layer is sleeved with a wrapping layer, and a filling layer is filled between the wrapping layer and the plurality of cable units.

[0007] Preferably, any of the above schemes is that the material of the central tube and the partition plate is flexible rubber, and the interior of the central tube is a hollow structure.

[0008] Preferably, any of the above schemes is that the material of the insulating layer is insulating rubber, and the material of the heat-resistant layer is silicone rubber.

[0009] Preferably, in any of the above schemes, the shielding layer is a braided copper mesh, and the outer jacket layer is a cross-linked polyethylene sheath.

[0010] Preferably, in any of the above schemes, the material of the wrapping layer is natural fiber.

[0011] Preferably, any of the above solutions is that the filling layer is a mixture of talc and alumina.

[0012] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0013] 1. Through the arrangement of the central tube, the partition plate and the filling layer, the cable unit is embedded between the partition plates, which can separate several cable units, prevent the filling layer from gathering between several cable units, and thus prevent the filling layer from being unevenly distributed locally. In addition, the central tube and the partition plate are made of flexible rubber, and the central tube is hollow, which can ensure the overall flexibility of the cable. The filling layer is made of talc and alumina. The talc can effectively reduce the friction inside the cable with its slippery characteristics and good insulation performance, thereby improving the flexibility and bending performance of the cable. Alumina, with its high hardness and high temperature resistance, provides excellent structural support and heat-resistant protection for the cable. Therefore, the mixed use of the two can combine the advantages of both, which not only ensures the flexibility of the cable, but also enhances its structural stability and heat resistance.

[0014] 2. Through the setting of heat-resistant layer, shielding layer and wrapping layer, the heat-resistant layer is made of silicone rubber. The silicone rubber outer skin has excellent high temperature resistance and aging resistance, which can play a heat-insulating effect. The setting of the shielding layer can suppress the radiation and interference of the cable to electromagnetic waves to a certain extent. The wrapping layer made of natural fibers can cover the filling layer. These fibers are lightweight and have certain flame-retardant properties. They can not only play a flame-retardant effect, but also increase the overall flexibility of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the partial structure of the cable of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the cable of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the cable unit of the utility model.

[0018] In the figure: 1-central tube, 2-partition plate, 3-cable unit, 301-conductive core, 302-insulating layer, 303-heat-resistant layer, 4-jacket layer, 5-shielding layer, 6-wrapping layer, 7-filling layer. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings, but the protection scope of the utility model is not limited to the following.

[0020] like Figures 1 to 3 As shown, a mineral insulated flexible fire-proof cable comprises a central tube 1 and a jacket layer 4, a plurality of partition plates 2 are fixedly connected to the outer surface of the central tube 1, a cable unit 3 is arranged between every two partition plates 2, the cable unit 3 comprises a conductive core 301, the outer surface of the conductive core 301 is covered with an insulating layer 302, the outer surface of the insulating layer 302 is covered with a heat-resistant layer 303, the inner wall of the jacket layer 4 is sleeved with a shielding layer 5, the inner wall of the shielding layer 5 is sleeved with a wrapping layer 6, and a filling layer 7 is filled between the wrapping layer 6 and the plurality of cable units 3.

[0021] As an optional technical solution of the present invention, the material of the central tube 1 and the partition plate 2 is flexible rubber, the interior of the central tube 1 is a hollow structure, the material of the central tube 1 and the partition plate 2 is flexible rubber, and the central tube 1 is a hollow design, which can ensure the overall flexibility of the cable.

[0022] As an optional technical solution of the present invention, the insulating layer 302 is made of insulating rubber, and the heat-resistant layer 303 is made of silicone rubber. The silicone rubber outer skin has excellent high temperature resistance and aging resistance, and can achieve a heat insulation effect.

[0023] As an optional technical solution of the utility model, the shielding layer 5 is a braided copper mesh, and the outer jacket layer 4 is a cross-linked polyethylene sheath. The setting of the shielding layer 5 can suppress the radiation and interference of the cable to electromagnetic waves to a certain extent.

[0024] As an optional technical solution of the present invention, the material of the wrapping layer 6 is natural fiber. The wrapping layer 6 made of natural fiber can cover the filling layer 7. Moreover, these fibers are lightweight and have certain flame retardant properties. They can not only have a flame retardant effect, but also increase the overall flexibility of the cable.

[0025] As an optional technical solution of the utility model, the filling layer 7 is a mixture of talc and alumina. The talc, with its slippery characteristics and good insulation performance, can effectively reduce the friction inside the cable, thereby improving the flexibility and bending performance of the cable. Alumina, with its high hardness and high temperature resistance, provides excellent structural support and heat-resistant protection for the cable. Therefore, the mixed use of the two can combine the advantages of the two, which not only ensures the flexibility of the cable, but also enhances its structural stability and heat resistance.

[0026] In summary, the mineral insulated flexible fireproof cable, through the arrangement of the central tube 1, the partition plate 2 and the filling layer 7, the cable unit 3 is embedded between the partition plates 2, which can separate several cable units 3, prevent the filling layer 7 from gathering between several cable units 3, and further prevent the filling layer 7 from being locally unevenly distributed. Moreover, the central tube 1 and the partition plate 2 are made of flexible rubber, and the central tube 1 is hollow, which can ensure the overall flexibility of the cable. The filling layer 7 is made of talc and alumina. The talc, with its slippery properties and good insulation properties, can effectively reduce the friction inside the cable, thereby improving the flexibility and bending performance of the cable. Alumina, with its high hardness and high temperature resistance, provides excellent structural support and heat protection for the cable. Therefore, the mixed use of the two can combine the advantages of both, which not only ensures the flexibility of the cable, but also enhances its structural stability and heat resistance; through the setting of the heat-resistant layer 303, the shielding layer 5 and the wrapping layer 6, the material of the heat-resistant layer 303 is silicone rubber, and the silicone rubber outer skin has excellent high temperature resistance and aging resistance, which can play a heat insulation effect. The setting of the shielding layer 5 can suppress the radiation and interference of the cable to electromagnetic waves to a certain extent. The wrapping layer 6 made of natural fibers can cover the filling layer 7, and these fibers are lightweight and have certain flame retardant properties, which can not only play a flame retardant effect, but also increase the overall flexibility of the cable.

Claims

1. A mineral insulated flexible fireproof cable, characterized in that: The invention comprises a central tube (1) and an outer jacket layer (4), wherein a plurality of partition plates (2) are fixedly connected to the outer surface of the central tube (1), a cable unit (3) is arranged between every two of the partition plates (2), the cable unit (3) comprises a conductive core (301), the outer surface of the conductive core (301) is coated with an insulating layer (302), the outer surface of the insulating layer (302) is coated with a heat-resistance layer (303), the inner wall of the outer jacket layer (4) is sleeved with a shielding layer (5), the inner wall of the shielding layer (5) is sleeved with a wrapping layer (6), and a filling layer (7) is filled between the wrapping layer (6) and the plurality of cable units (3).

2. A mineral insulated flexible fireproof cable according to claim 1, characterized in that: The central tube (1) and the partition plate (2) are made of flexible rubber, and the interior of the central tube (1) is a hollow structure.

3. A mineral insulated flexible fireproof cable according to claim 2, characterized in that: The material of the insulating layer (302) is insulating rubber, and the material of the heat-resistance layer (303) is silicone rubber.

4. A mineral insulated flexible fireproof cable according to claim 3, characterized in that: The shielding layer (5) is a braided copper mesh, and the outer jacket layer (4) is a cross-linked polyethylene sheath.

5. A mineral insulated flexible fireproof cable according to claim 4, characterized in that: The material of the wrapping layer (6) is natural fiber.

6. A mineral insulated flexible fireproof cable according to claim 5, characterized in that: The filling layer (7) is a mixture of talc and alumina.

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