Corrugated copper tube sheath inorganic mineral insulation fireproof cable

Abstract

The utility model discloses a corrugated copper tube sheath inorganic mineral insulation fireproof cable, comprising a cable core, the cable core comprises a wire core and a filling layer, the outside of the cable core is provided with a mica wrapping layer, the mica wrapping layer is in spiral winding connection with the outside of the cable core, the outside of the mica wrapping layer is provided with a composite fireproof layer, and the outside of the composite fireproof layer is provided with an insulating layer. A composite fireproof layer is arranged outside the cable and attached to the mica wrapping layer, an armor layer is arranged outside the composite fireproof layer and attached to the composite fireproof layer, an outer sheath is arranged outside the armor layer, and the outer sheath and the armor layer are formed through extrusion. The fireproof performance of the cable is greatly improved, the cable does not agree to combust under the condition of high-temperature fire disasters, fire spreading is prevented, the mechanical performance of the cable is improved through the corrugated copper pipes, the cable has excellent bending performance and can be freely bent at different angles, and the using effect of the cable is improved.

Description

Technical Field

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

[0002] A cable is a wire with an insulation layer and a protective sheath. It consists of one or more mutually insulated conductors and an outer insulation layer, and is used to transmit electricity or information from one location to another. Fire-resistant cable is a special type of cable with excellent fire resistance. It can maintain a certain level of functionality and safety in the event of a fire. Under specified test conditions, the specimen is burned. After the test fire source is removed, the spread of the flame is limited to a limited range, and the residual flame or residual burn will self-extinguish within a specified time. Fire-resistant cable plays a vital role in improving the fire resistance of power systems and protecting the lives of personnel and the safety of important equipment.

[0003] The Chinese patent publication number is CN220604377U, and the authorization announcement date is March 15, 2024. A corrugated copper tube sheathed inorganic mineral insulated fireproof cable relates to the field of cable technology, including a sheath and an electromagnetic shielding layer; the sheath: copper strands are evenly distributed inside, and the outer side of the copper strands is wrapped with a mica sheath, and the gap between the sheath and the mica sheath is filled with a filler, the filler is calcium carbonate, and the outer side of the sheath is wrapped with a protective ribbon, the protective ribbon is high silica fiber, and the electromagnetic shielding layer is bonded to the outer side of the protective ribbon; wherein: it also includes a fire isolation belt and a corrugated sheath, the fire isolation belt is wrapped around the outside of the electromagnetic shielding layer, the corrugated copper tube sheathed inorganic mineral insulated fireproof cable, the set fire isolation belt and flame retardant protective sheath can play a certain flame retardant and isolation role on the flame to prevent the cable from being affected by high temperature during a fire, and the corrugated sheath and wear-resistant layer can prevent the cable from being squeezed and rubbed by external objects, causing the copper wire to be exposed.

[0004] Existing cables have a simple internal structure, low fire resistance, no metal sheath on the cable core, and poor bending properties. When the cable is squeezed and bent, it is easy to cause the cable to crack and be exposed. In high temperatures or fires, the cable will quickly burn and be damaged, reducing the service life of the cable and failing to meet usage requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a corrugated copper tube sheathed inorganic mineral insulated fireproof cable to solve the problems raised in the above background technology that the existing cables have a simple internal structure, low fireproof performance, no metal sheath on the cable core, poor bending characteristics, and are prone to cracking and exposure when the cables are squeezed and bent. In the event of high temperature or fire, the cables will quickly burn and be damaged, reducing the service life of the cables and failing to meet usage requirements.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a corrugated copper tube sheathed inorganic mineral insulated fireproof cable, comprising a cable core, the cable core comprising a wire core and a filling layer, a mica sheath is provided on the outside of the cable core, and the mica sheath is spirally wound and connected on the outside of the cable core, a composite fireproof layer is provided on the outside of the mica sheath, and the composite fireproof layer is bonded to the mica sheath, an armor layer is provided on the outside of the composite fireproof layer, and the armor layer is bonded to the composite fireproof layer, an outer sheath is provided on the outside of the armor layer, and the outer sheath and the armor layer are extruded.

[0007] Preferably, the wire core includes a conductor, a shielding layer, an insulating layer and a corrugated copper tube sleeve, and the conductor is made of multiple copper wires twisted together, the shielding layer is arranged on the outside of the conductor, the insulating layer is arranged on the outside of the shielding layer, and the shielding layer and the insulating layer are sequentially extruded on the outside of the conductor, the corrugated copper tube sleeve is arranged on the outside of the insulating layer, and the corrugated copper tube sleeve is in contact with the insulating layer.

[0008] Preferably, an identification tape is provided on the outer wall of the insulating layer, and the identification tape and the insulating layer are provided as one body, and the identification tape is provided along the direction of the wire core.

[0009] Preferably, the composite fireproof layer includes a fireproof layer, a fire-resistant layer and a heat-insulating layer, the fire-resistant layer is arranged outside the heat-insulating layer, the fireproof layer is arranged outside the fire-resistant layer, and the fireproof layer, the fire-resistant layer and the heat-insulating layer are pressed together.

[0010] Preferably, the outer sheath includes a base layer, an anti-puncture mesh layer and a corrosion-resistant coating, the base layer is arranged on the outside of the anti-puncture mesh layer, and the anti-puncture mesh layer and the base layer are arranged as a whole, the corrosion-resistant coating is arranged on the outside of the base layer, and the corrosion-resistant coating is coated on the outside of the base layer as a whole.

[0011] Preferably, the outside of the base layer is provided with raised blocks, there are at least six raised blocks, and the raised blocks are equidistantly arranged around the cross section of the outer sheath, the raised blocks are integrated with the base layer, and the raised blocks are equidistantly arranged outside the base layer along the direction of the wire core.

[0012] Preferably, there are three cores, and the three cores are equidistantly arranged in a triangle shape inside the cable core, and the filling layer is arranged in the gaps between the three cores.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model device is provided with a corrugated copper tube sleeve, a fireproof layer, a fire-resistant layer and a thermal insulation layer. The corrugated copper tube sleeve increases the mechanical strength of the wire core, the corrugated copper tube sleeve has good thermal conductivity, and can accelerate the heat dissipation of the wire core. The corrugated copper tube sleeve also has excellent bending performance and can be bent freely at different angles, which improves the bending and laying requirements of the cable. The fireproof layer is made of magnesium oxide, which is an inorganic mineral insulating material with a high melting point and good electrical insulation performance. It maintains stable electrical performance in a high temperature environment and is not easy to burn or spread flames. The fireproof layer is made of ceramic silicone rubber, which has excellent fireproof and flame retardant properties. The residue after combustion will form a hard ceramic shell. This hard shell will neither melt nor drip in a fire environment, thereby effectively preventing the spread of fire. The thermal insulation layer is made of rock wool, which has good thermal insulation and fireproof properties, effectively isolates heat transfer, and improves the fireproof effect of the cable.

[0015] The utility model device is provided with an anti-puncture mesh layer, raised blocks and corrosion-resistant coating. The anti-puncture mesh layer can prevent sharp external objects from piercing the outer sheath, thereby protecting the internal cable core. When the cable comes into contact with foreign objects, it first contacts the raised blocks, which can increase the wear resistance of the cable. The corrosion-resistant coating is made of polyvinyl chloride, has good corrosion resistance, can resist the erosion of acid, alkali and other chemical substances, and also has high wear resistance and weather resistance, thereby improving the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the wire core of the present utility model;

[0018] Figure 3 This is a structural diagram of the composite fireproof layer of the utility model;

[0019] Figure 4 This is a structural diagram of the outer sheath of the present utility model.

[0020] In the figure: 1. Cable core; 2. Wire core; 3. Filling layer; 4. Mica wrapping layer; 5. Composite fireproof layer; 6. Armor layer; 7. Outer sheath; 8. Conductor; 9. Shielding layer; 10. Insulation layer; 11. Corrugated copper tube sleeve; 12. Identification tape; 13. Fireproof layer; 14. Fire-resistant layer; 15. Insulation layer; 16. Base layer; 17. Anti-puncture mesh layer; 18. Raised block; 19. Corrosion-resistant coating. DETAILED DESCRIPTION

[0021] 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 the embodiments.

[0022] See also Figure 1-4 The utility model provides an embodiment: a corrugated copper tube sheathed inorganic mineral insulated fire-proof cable, comprising a cable core 1, the cable core 1 comprising a wire core 2 and a filling layer 3, three wire cores 2 are provided, and the three wire cores 2 are equidistantly arranged in a triangle inside the cable core 1, the filling layer 3 is provided in the gap between the three wire cores 2, a mica wrapping layer 4 is provided on the outside of the cable core 1, and the mica wrapping layer 4 is spirally wound and connected on the outside of the cable core 1, a composite fireproof layer 5 is provided on the outside of the mica wrapping layer 4, and the composite fireproof layer 5 is fitted with the mica wrapping layer 4, an armor layer 6 is provided on the outside of the composite fireproof layer 5, and the armor layer 6 is fitted with the composite fireproof layer 5, an outer sheath 7 is provided on the outside of the armor layer 6, and the outer sheath 7 and the armor layer 6 are extruded.

[0023] See also Figure 1 and Figure 2 The core 2 includes a conductor 8, a shielding layer 9, an insulating layer 10 and a corrugated copper tube sleeve 11, and the conductor 8 is made of a plurality of copper wires twisted together, the shielding layer 9 is arranged on the outside of the conductor 8, the insulating layer 10 is arranged on the outside of the shielding layer 9, and the shielding layer 9 and the insulating layer 10 are sequentially extruded on the outside of the conductor 8, the corrugated copper tube sleeve 11 is arranged on the outside of the insulating layer 10, and the corrugated copper tube sleeve 11 is in contact with the insulating layer 10, and an identification tape 12 is provided on the outer wall of the insulating layer 10, and the identification tape 12 is integrated with the insulating layer 10, and the identification tape 12 is arranged along the direction of the core 2, the corrugated copper tube sleeve 11 increases the mechanical strength of the core 2, the corrugated copper tube sleeve 11 has good thermal conductivity, which can accelerate the heat dissipation of the core 2, and the corrugated copper tube sleeve 11 also has excellent bending performance and can be freely bent at different angles, thereby improving the bending and laying requirements of the cable. The identification tape 12 identifies the functional characteristics of the core 2, which is convenient for the staff to select the appropriate core 2 for connection and improves the use effect of the fire-proof cable.

[0024] See also Figure 1 and Figure 3The composite fireproof layer 5 includes a fireproof layer 13, a fire-resistant layer 14 and a thermal insulation layer 15. The fire-resistant layer 14 is arranged on the outside of the thermal insulation layer 15, and the fireproof layer 13 is arranged on the outside of the fire-resistant layer 14, and the fireproof layer 13, the fire-resistant layer 14 and the thermal insulation layer 15 are pressed into one. The fireproof layer 13 is made of magnesium oxide, which is an inorganic mineral insulating material with a high melting point and good electrical insulation properties. It maintains stable electrical properties in a high temperature environment and is not easy to burn or spread flames. The fire-resistant layer 14 is made of ceramic silicone rubber, which has excellent fireproof and flame retardant properties. The residue after combustion will form a hard ceramic shell. This hard shell will neither melt nor drip in a fire environment, thereby effectively preventing the spread of fire. The thermal insulation layer 15 is made of rock wool, which has good thermal insulation and fireproof properties, effectively isolates heat transfer, and improves the fireproof effect of the cable.

[0025] See also Figure 1 and Figure 4 The outer sheath 7 includes a base layer 16, an anti-puncture mesh layer 17 and a corrosion-resistant coating 19. The base layer 16 is arranged on the outside of the anti-puncture mesh layer 17, and the anti-puncture mesh layer 17 and the base layer 16 are arranged as a whole. The corrosion-resistant coating 19 is arranged on the outside of the base layer 16, and the corrosion-resistant coating 19 is coated as a whole on the outside of the base layer 16. A raised block 18 is provided on the outside of the base layer 16. There are at least six raised blocks 18, and the raised blocks 18 are equidistantly arranged around the cross section of the outer sheath 7. The raised blocks 18 are arranged as a whole with the base layer 16, and the raised blocks 18 are arranged on the outside of the base layer 16 along the direction of the core 2. The base layer 16 is made of cross-linked polyethylene. The cross-linked polyethylene is transformed into a mesh structure by cross-linking, which improves its high-temperature deformation resistance and can protect the cable in extreme environments. The anti-puncture mesh layer 17 can prevent sharp external objects from piercing the outer sheath 7, and protect the internal cable core 1. When the cable contacts foreign objects, it first contacts the raised block 18, which can increase the wear resistance of the cable. The corrosion-resistant coating 19 is made of polyvinyl chloride, has good corrosion resistance, can resist the erosion of chemicals such as acids and alkalis, and also has high wear resistance and weather resistance, thereby increasing the service life of the cable.

[0026] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrugated copper tube sheathed inorganic mineral insulated fireproof cable, comprising a cable core (1), characterized in that: The cable core (1) comprises a wire core (2) and a filling layer (3); a mica wrapping layer (4) is provided on the outside of the cable core (1), and the mica wrapping layer (4) is spirally wound and connected on the outside of the cable core (1); a composite fireproof layer (5) is provided on the outside of the mica wrapping layer (4), and the composite fireproof layer (5) is adhered to the mica wrapping layer (4); an armor layer (6) is provided on the outside of the composite fireproof layer (5), and the armor layer (6) is adhered to the composite fireproof layer (5); an outer sheath (7) is provided on the outside of the armor layer (6), and the outer sheath (7) and the armor layer (6) are formed by extrusion.

2. The corrugated copper tube sheathed inorganic mineral insulated fireproof cable according to claim 1, characterized in that: The wire core (2) comprises a conductor (8), a shielding layer (9), an insulating layer (10) and a corrugated copper tube sleeve (11), wherein the conductor (8) is made of a plurality of copper wires twisted together, the shielding layer (9) is arranged outside the conductor (8), the insulating layer (10) is arranged outside the shielding layer (9), and the shielding layer (9) and the insulating layer (10) are sequentially extruded outside the conductor (8), and the corrugated copper tube sleeve (11) is arranged outside the insulating layer (10), and the corrugated copper tube sleeve (11) is in contact with the insulating layer (10).

3. The corrugated copper tube sheathed inorganic mineral insulated fireproof cable according to claim 2, characterized in that: An identification tape (12) is provided on the outer wall of the insulating layer (10), and the identification tape (12) and the insulating layer (10) are integrated, and the identification tape (12) is provided along the direction of the wire core (2).

4. The corrugated copper tube sheathed inorganic mineral insulated fireproof cable according to claim 1, characterized in that: The composite fireproof layer (5) comprises a fireproof layer (13), a fire-resistant layer (14) and a heat-insulating layer (15), wherein the fire-resistant layer (14) is arranged outside the heat-insulating layer (15), and the fireproof layer (13) is arranged outside the fire-resistant layer (14), and the fireproof layer (13), the fire-resistant layer (14) and the heat-insulating layer (15) are pressed together into one body.

5. The corrugated copper tube sheathed inorganic mineral insulated fireproof cable according to claim 1, characterized in that: The outer sheath (7) comprises a base layer (16), an anti-puncture mesh layer (17) and a corrosion-resistant coating (19); the base layer (16) is arranged outside the anti-puncture mesh layer (17), and the anti-puncture mesh layer (17) and the base layer (16) are arranged as a whole; the corrosion-resistant coating (19) is arranged outside the base layer (16), and the corrosion-resistant coating (19) is coated on the outside of the base layer (16) as a whole.

6. The corrugated copper tube sheathed inorganic mineral insulated fireproof cable according to claim 5, characterized in that: The base layer (16) is provided with raised blocks (18) on the outside, and there are at least six raised blocks (18). The raised blocks (18) are equidistantly arranged around the cross section of the outer sheath (7). The raised blocks (18) and the base layer (16) are provided as a whole, and the raised blocks (18) are equidistantly arranged on the outside of the base layer (16) along the direction of the wire core (2).

7. The corrugated copper tube sheathed inorganic mineral insulated fireproof cable according to claim 1, characterized in that: Three wire cores (2) are provided, and the three wire cores (2) are arranged equidistantly in a triangular shape inside the cable core (1), and the filling layer (3) is provided in the gaps between the three wire cores (2).

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