Flexible mineral insulated cable

Abstract

The utility model discloses a flexible mineral insulated cable, comprising a cable main body, the cable main body is internally provided with an insulating sheath, a flexible protective sleeve, a mineral filling layer, an insulating protective sleeve and a cable core body, and the cable core body is internally provided with a cable core protective sleeve and a copper core conductor. The flexible protective sleeve internally comprises a silica gel protective sleeve, a chloroprene rubber protective sleeve and a resin rubber protective sleeve, the mineral filling layer internally comprises a perlite filling layer, a mineral fiber filling layer and a ceramic fiber filling layer, and the insulating protective sleeve internally comprises a polyethylene insulating plastic sleeve and a polypropylene insulating plastic sleeve. According to the utility model, the flexible protection design is carried out on the cable, so that the cable has good flexibility and tensile property, and meanwhile, the multiple mineral protection layer structures are filled in the cable, so that the overall structural strength and hardness of the cable can be enhanced, and the phenomenon of deformation and damage of the cable can be effectively prevented.

Description

Technical Field

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

[0002] In recent years, with the rapid development of the national economy, the wire and cable industry has developed rapidly and has become one of the important supporting industries for my country's economic construction. Wires and cables are widely used in various fields of the national economy, such as the electric power industry, data communications industry, and urban rail transit industry.

[0003] The Chinese authorized patent document with publication number CN109586119A provides a mineral insulated cable assembly, the mineral insulated cable assembly includes a cable, the cable adopts an inorganic mineral insulated cable, and the mineral insulated cable assembly also includes: a connector group, the connector group is used to connect one end of two of the cables; a corrugated tube, the corrugated tube is sleeved on the outer periphery of a number of the cables, the corrugated tube is used to protect the cables; a connector adapter tail, the connector adapter tail is fixedly connected to the connector group and the corrugated tube. The mineral insulated cable assembly provided by the present invention adopts an inorganic design, and the cables, connectors, adapter tails, etc. in the assembly do not contain organic materials, and have no thermal aging and radiation aging mechanisms. It can meet the very harsh working environment of high temperature, high pressure, high humidity and strong radiation inside or at the boundary of the reactor pressure vessel, meet the 60-year working life, and the connector meets 200 plug-in and pull-out times.

[0004] The internal structure strength of the cable in the above-mentioned prior art is not high, and it is easy to be pulled and crushed and damaged, so it is necessary to develop a flexible mineral insulated cable. Utility Model Content

[0005] The utility model aims to provide a flexible mineral insulated cable to solve the problems in the prior art proposed in the above background technology that the internal structure strength of the cable is not high and it is easy to be pulled and crushed.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flexible mineral insulated cable, comprising a cable body, the interior of the cable body comprising an insulating outer sheath, a flexible protective sheath, a mineral filling layer, an insulating protective sheath and a cable core, the interior of the cable core comprising a cable core protective sheath and a copper core conductor, the interior of the flexible protective sheath comprising a silicone protective sheath, a chloroprene rubber protective sheath and a resin rubber protective sheath, the interior of the mineral filling layer comprising a perlite filling layer, a mineral fiber filling layer and a ceramic fiber filling layer, and the interior of the insulating protective sheath comprising a polyethylene insulating plastic sheath and a polypropylene insulating plastic sheath.

[0007] Based on the above, the insulating outer sheath is wrapped around the outer surface of the flexible protective sheath, the flexible protective sheath is wrapped around the outer surface of the mineral filling layer, the mineral filling layer is wrapped around the outer surface of the insulating protective sheath, the insulating protective sheath is wrapped around the outer surface of the cable core, and the cable core protective sheath is wrapped around the outer surface of the copper core conductor.

[0008] Based on the above, the thickness of the flexible protective cover is 0.5-0.7 mm, the thickness of the mineral filling layer is 0.6-0.8 mm, and the thickness of the insulating protective cover is 0.7-0.8 mm.

[0009] Based on the above, the silicone protective sleeve is wrapped around the outer surface of the neoprene protective sleeve.

[0010] Based on the above, the resin rubber protective sleeve is arranged on the inner surface of the chloroprene rubber protective sleeve.

[0011] Based on the above, the perlite filling layer is wrapped on the outer surface of the mineral fiber filling layer, and the mineral fiber filling layer is wrapped on the outer surface of the ceramic fiber filling layer.

[0012] Based on the above, the polyethylene insulating plastic sleeve is wrapped around the outer surface of the polypropylene insulating plastic sleeve.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model adopts a flexible protection design for the cable and is provided with a flexible protective sleeve, wherein the flexible protective sleeve comprises a silicone protective sleeve, a chloroprene rubber protective sleeve and a resin rubber protective sleeve, so that the flexible protective sleeve has good flexibility and tensile resistance, and is filled with a multiple mineral protective layer structure, wherein the mineral filling layer comprises a perlite filling layer, a mineral fiber filling layer and a ceramic fiber filling layer, so that the overall structural strength and hardness of the cable can be enhanced, deformation and damage can be effectively prevented, and better safety protection effect is provided to the cable core, thereby prolonging the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall cross-sectional view of the cable body of the utility model;

[0016] Figure 2 This is a cross-sectional view of the flexible protective cover of the utility model;

[0017] Figure 3 This is a cross-sectional view of the mineral filling layer of the utility model;

[0018] Figure 4 It is a cross-sectional view of the insulating protective cover of the utility model.

[0019] In the figure: 1. Cable body; 2. Insulating outer sheath; 3. Flexible protective sheath; 4. Mineral filling layer; 5. Insulating protective sheath; 6. Cable core; 7. Cable core protective sheath; 8. Copper core conductor; 9. Silicone protective sheath; 10. Neoprene protective sheath; 11. Resin rubber protective sheath; 12. Perlite filling layer; 13. Mineral fiber filling layer; 14. Ceramic fiber filling layer; 15. Polyethylene insulating plastic sheath; 16. Polypropylene insulating plastic sheath. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1-4 The utility model provides an embodiment: a flexible mineral insulated cable, including a cable body 1, the interior of the cable body 1 includes an insulating outer sheath 2, a flexible protective sheath 3, a mineral filling layer 4, an insulating protective sheath 5 and a cable core 6, the interior of the cable core 6 includes a cable core protective sheath 7 and a copper core conductor 8, the interior of the flexible protective sheath 3 includes a silicone protective sheath 9, a chloroprene rubber protective sheath 10 and a resin rubber protective sheath 11, the interior of the mineral filling layer 4 includes a perlite filling layer 12, a mineral fiber filling layer 13 and a ceramic fiber filling layer 14, and the interior of the insulating protective sheath 5 includes a polyethylene insulating plastic sheath 15 and a polypropylene insulating plastic sheath 16.

[0022] Furthermore, the insulating outer sheath 2 is wrapped around the outer surface of the flexible protective sheath 3, the flexible protective sheath 3 is wrapped around the outer surface of the mineral filling layer 4, the mineral filling layer 4 is wrapped around the outer surface of the insulating protective sheath 5, the insulating protective sheath 5 is wrapped around the outer surface of the cable core 6, and the cable core protective sheath 7 is wrapped around the outer surface of the copper core conductor 8.

[0023] Furthermore, the thickness of the flexible protective cover 3 is 0.5-0.7 mm, the thickness of the mineral filling layer 4 is 0.6-0.8 mm, and the thickness of the insulating protective cover 5 is 0.7-0.8 mm.

[0024] Furthermore, the silicone protective sleeve 9 is wrapped around the outer surface of the chloroprene rubber protective sleeve 10. Both the silicone protective sleeve 9 and the chloroprene rubber protective sleeve 10 have good flexible protective effects, excellent elasticity and tensile protection properties, and can improve the overall tensile and tearing resistance of the cable.

[0025] Furthermore, the resin rubber protective sleeve 11 is arranged on the inner surface of the chloroprene rubber protective sleeve 10, and the resin rubber protective sleeve 11 can further improve the tensile and tear resistance of the entire cable.

[0026] Furthermore, the perlite filling layer 12 is wrapped around the outer surface of the mineral fiber filling layer 13, and the mineral fiber filling layer 13 is wrapped around the outer surface of the ceramic fiber filling layer 14. By providing the perlite filling layer 12, the mineral fiber filling layer 13 and the ceramic fiber filling layer 14, which are all structural protective layers compressed from mineral materials with high structural strength and hardness, they can further provide good protection for the cable and improve the overall rigidity and toughness of the cable.

[0027] Furthermore, the polyethylene insulating plastic sleeve 15 is wrapped around the outer surface of the polypropylene insulating plastic sleeve 16 , and the polyethylene insulating plastic sleeve 15 and the polypropylene insulating plastic sleeve 16 play an insulating and sealing protective role.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part are connected by conventional means such as mature bolts, rivets, welding, etc. in the prior art. In addition, the machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, so no specific description is given here.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flexible mineral insulated cable, comprising a cable body (1), characterized in that: The interior of the cable body (1) comprises an insulating outer sheath (2), a flexible protective sheath (3), a mineral filling layer (4), an insulating protective sheath (5) and a cable core (6); the interior of the cable core (6) comprises a cable core protective sheath (7) and a copper core conductor (8); the interior of the flexible protective sheath (3) comprises a silicone protective sheath (9), a chloroprene rubber protective sheath (10) and a resin rubber protective sheath (11); the interior of the mineral filling layer (4) comprises a perlite filling layer (12), a mineral fiber filling layer (13) and a ceramic fiber filling layer (14); and the interior of the insulating protective sheath (5) comprises a polyethylene insulating plastic sheath (15) and a polypropylene insulating plastic sheath (16).

2. A flexible mineral insulated cable according to claim 1, characterized in that: The insulating outer sheath (2) is wrapped around the outer surface of the flexible protective sheath (3), the flexible protective sheath (3) is wrapped around the outer surface of the mineral filling layer (4), the mineral filling layer (4) is wrapped around the outer surface of the insulating protective sheath (5), the insulating protective sheath (5) is wrapped around the outer surface of the cable core (6), and the cable core protective sheath (7) is wrapped around the outer surface of the copper core conductor (8).

3. A flexible mineral insulated cable according to claim 1, characterized in that: The thickness of the flexible protective cover (3) is 0.5-0.7 mm, the thickness of the mineral filling layer (4) is 0.6-0.8 mm, and the thickness of the insulating protective cover (5) is 0.7-0.8 mm.

4. A flexible mineral insulated cable according to claim 1, characterized in that: The silicone protective sleeve (9) is wrapped around the outer surface of the chloroprene rubber protective sleeve (10).

5. A flexible mineral insulated cable according to claim 1, characterized in that: The resin rubber protective sleeve (11) is arranged on the inner surface of the chloroprene rubber protective sleeve (10).

6. A flexible mineral insulated cable according to claim 1, characterized in that: The pearlite filling layer (12) is wrapped around the outer surface of the mineral fiber filling layer (13), and the mineral fiber filling layer (13) is wrapped around the outer surface of the ceramic fiber filling layer (14).

7. A flexible mineral insulated cable according to claim 1, characterized in that: The polyethylene insulating plastic sleeve (15) is wrapped around the outer surface of the polypropylene insulating plastic sleeve (16).

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