High-flame-retardant fireproof power cable

Abstract

The utility model discloses a high-flame-retardant fireproof power cable, relates to the technical field of power cables, solves the problems that a device is only provided with a substance with water-blocking performance, does not have fireproof capability, and cannot keep a power supply line continuously, safely and stably running under a flame condition, and comprises a first cable. According to the utility model, the outer side of the cable is sleeved with the low-smoke halogen-free polyolefin sheath, so that the wire cable can be protected when a fire disaster occurs, the harm of harmful substances such as smoke and toxic gas generated by the wire cable in the fire disaster to a human body is reduced, the transmission performance of the wire cable is ensured, the fire-resistant time is further prolonged, and the service life of the wire cable is prolonged. And the cross-linked polyethylene insulating layer is protected by the flame-retardant sheath layer, so that the flame-retardant time is further prolonged, the cable has higher fire resistance, and the problems that the device is only provided with a water-blocking substance, does not have fire resistance and cannot keep a power supply line continuously, safely and stably running under a flame condition are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a highly flame-retardant and fire-resistant power cable. Background Art

[0002] Wires and cables are wire products used to transmit electrical (magnetic) energy, information and realize electromagnetic energy conversion. Wires and cables in a broad sense are also referred to as cables. Cables in a narrow sense refer to insulated cables, which can be defined as: a collection of the following parts; one or more insulated cores, and their respective coatings, total protective layers and outer sheaths. Cables may also have additional uninsulated conductors.

[0003] The medium-voltage cable disclosed in the Chinese utility model (announcement number: CN203706707U) includes a metal protective layer, which is a steel wire armor. A water-blocking yarn is respectively arranged in the conductors of the three cable cores, and a water-blocking material is filled in the gap formed between the three cable cores and the inner sheath. A water-blocking tape is arranged between the water-blocking material and the inner sheath, between the inner sheath and the metal protective layer, and between the metal protective layer and the outer sheath. By arranging a material with water-blocking properties inside the conductor of the cable core of the medium-voltage cable, between the cable cores, and between the inner and outer sheaths and the steel wire armor, the medium-voltage cable of this scheme can be waterproof in both radial and axial directions at the same time, and its mechanical properties are good.

[0004] In the process of realizing the utility model, the inventors found that there are at least the following problems in the technology. The above-mentioned technology arranges a substance with water-blocking properties inside the conductor of the cable core of the medium-voltage cable, between the cable cores, and between the inner and outer sheaths and the steel wire armor, so that the medium-voltage cable of this scheme can be waterproof in both radial and axial directions and has good mechanical properties. However, the above-mentioned device is only provided with a substance with water-blocking properties and has no fire resistance. It cannot keep the power supply line running safely and stably under flame conditions. Therefore, a highly flame-retardant and fire-resistant power cable is now proposed. Utility Model Content

[0005] In order to improve the problem that the device is only provided with a material having water-blocking properties, has no fire resistance, and cannot keep the power supply line running safely and stably under flame conditions, the utility model provides a highly flame-retardant and fire-resistant power cable.

[0006] The utility model provides a highly flame-retardant and fire-resistant power cable, which adopts the following technical solutions:

[0007] A highly flame-retardant and fire-resistant power cable comprises a first cable, wherein a low-smoke halogen-free polyolefin sheath is arranged on the surface of the first cable, a polyurethane waterproof coating is arranged on one side of the low-smoke halogen-free polyolefin sheath, a flame-retardant sheath layer is arranged inside the polyurethane waterproof coating, a cross-linked polyethylene insulation layer is arranged on one side of the flame-retardant sheath layer, a graphene coating is arranged on one side of the cross-linked polyethylene insulation layer, an aluminum sheath isolation layer is arranged on one side of the graphene coating, and a polypropylene mesh belt filling layer is arranged on one side of the aluminum sheath isolation layer.

[0008] By adopting the above technical scheme, the device can protect the wires and cables in the event of a fire by sheathing a low-smoke halogen-free polyolefin sheath on the outside of the cable, reduce the harm to the human body caused by harmful substances such as smoke and toxic gases generated by the wires and cables in the fire, and ensure the transmission performance of the wires and cables, further extend the fire resistance time, and protect the cross-linked polyethylene insulation layer through the flame retardant sheath layer, further extend the flame retardant time, have higher fire resistance, and avoid the problem that the device is only provided with a water-blocking material, has no fire resistance, and cannot keep the power supply line running safely and stably under flame conditions.

[0009] Optionally, an insulating layer is provided inside the polypropylene mesh belt filling layer, and a metal conductor core is provided inside the insulating layer.

[0010] By adopting the above technical solution, the main function of the polyethylene insulation layer is to isolate the live conductor to prevent current leakage, short circuit and other electrical accidents, thereby enhancing the service life of the cable.

[0011] Optionally, a shockproof support frame is provided on one side of the metal conductor core, a waterproof layer is provided inside the shockproof support frame, and heat dissipation holes are provided inside the shockproof support frame.

[0012] By adopting the above technical solution, a shockproof support frame is arranged inside the cable, which improves the anti-extrusion performance of the power cable, thereby preventing the outside of the power cable from being squeezed and causing the wire to break.

[0013] Optionally, a positioning tube is provided on one side of the first cable, a positioning block is fixed on the surface of the positioning tube, and a thread is fixed on one side of the positioning tube.

[0014] By adopting the above technical solution, the setting of the thread enables the positioning tube to be connected to the connecting tube, thereby improving the tightness of the device connection.

[0015] Optionally, a connecting tube is provided on the outer side of the thread, a positioning groove is provided on the surface of the connecting tube, a heat dissipation ring is provided inside the connecting tube, and a second cable is provided on one side of the connecting tube.

[0016] By adopting the above technical solution, the positioning tube is rotated so that the positioning block engages with the positioning groove, thereby enhancing the stability of the connection between the positioning tube and the connecting tube, and the provision of the heat dissipation ring improves the heat dissipation efficiency of the cable.

[0017] Optionally, one side of the positioning tube is threadedly connected with a fastening screw 2, one side of the connecting tube is threadedly connected with a fastening screw 1, one side of the fastening screw 1 is connected to a rotating bearing, one side of the rotating bearing is fixed with a clamping block 1, one side of the clamping block 1 is provided with a clamping block 2, and one side of the clamping block 2 is fixed with a silicone rubber pad.

[0018] By adopting the above technical solution, by rotating the fastening screw 1, the fastening screw 1 drives the clamping block 1 and the clamping block 2 to move in the direction of the second cable with the cooperation of the rotating bearing, so as to facilitate clamping the second cable. The device can be adjusted according to the width of different cables, thereby improving the working effect, facilitating disassembly at any time, and improving the working efficiency.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. The utility model can protect the wires and cables when a fire occurs by sheathing a low-smoke halogen-free polyolefin sheath on the outside of the cable, reduce the harm to the human body caused by smoke, toxic gases and other harmful substances generated by the wires and cables in the fire, and ensure the transmission performance of the wires and cables, further prolong the fire resistance time, and protect the cross-linked polyethylene insulation layer through the flame-retardant sheath layer, further prolong the flame retardant time, have higher fire resistance, and avoid the problem that the device is only provided with a material with water-blocking performance, has no fire resistance, and cannot keep the power supply line running safely and stably under the condition of flame;

[0021] 2. The utility model rotates the fastening screw 1, and the fastening screw 1 drives the clamping block 1 and the clamping block 2 to move in the direction of the second cable with the cooperation of the rotating bearing, so as to facilitate clamping the second cable. The device can be adjusted according to the width of different cables, thereby improving the working effect, facilitating disassembly at any time, and improving the working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0023] Figure 2 It is a schematic diagram of the structure of the connecting pipe and the positioning pipe of the utility model.

[0024] Figure 3 This is a schematic diagram of the internal structure of the utility model cable

[0025] Figure 4 It is a schematic diagram of the structure of the fastening screw of the utility model.

[0026] Description of reference numerals:

[0027] 1. First cable; 2. Second cable; 3. Connecting tube; 4. Fastening screw 1; 5. Positioning groove; 6. Positioning block; 7. Positioning tube; 8. Fastening screw 2; 9. Thread; 10. Heat dissipation ring; 11. Flame retardant sheath layer; 12. Cross-linked polyethylene insulation layer; 13. Shockproof support frame; 14. Waterproof layer; 15. Insulation layer; 16. Metal conductor core; 17. Clamping block 1; 18. Clamping block 2; 19. Rotating bearing; 20. Silicon rubber pad. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-4 This application is described in further detail.

[0029] Please refer to Figure 1-4 A highly flame-retardant and fire-resistant power cable comprises a first cable 1, wherein the surface of the first cable 1 is provided with a low-smoke halogen-free polyolefin sheath, one side of the low-smoke halogen-free polyolefin sheath is provided with a polyurethane waterproof coating, a flame-retardant sheath layer 11 is provided inside the polyurethane waterproof coating, one side of the flame-retardant sheath layer 11 is provided with a cross-linked polyethylene insulation layer 12, one side of the cross-linked polyethylene insulation layer 12 is provided with a graphene coating, one side of the graphene coating is provided with an aluminum sheath isolation layer, one side of the aluminum sheath isolation layer is provided with a polypropylene mesh belt filling layer, and the device is provided by A low-smoke halogen-free polyolefin sheath is sheathed on the outside of the cable to protect the wires and cables in the event of a fire, reduce the harm to the human body caused by harmful substances such as smoke and toxic gases generated by the wires and cables in a fire, ensure the transmission performance of the wires and cables, further extend the fire resistance time, and protect the cross-linked polyethylene insulation layer 12 through the flame retardant sheath layer 11 to further extend the flame retardant time, with higher fire resistance, avoiding the problem that the device is only provided with a material with water-blocking properties, has no fire resistance, and cannot keep the power supply line running safely and stably under flame conditions.

[0030] Reference Figure 1 and Figure 3An insulating layer 15 is arranged inside the polypropylene mesh filling layer, and a metal conductor core 16 is arranged inside the insulating layer 15. The main function of the polyethylene insulating layer 15 is to isolate the live conductor to prevent current leakage, short circuit and other electrical accidents, thereby enhancing the service life of the cable. A shockproof support frame 13 is arranged on one side of the metal conductor core 16, and a waterproof layer 14 is provided inside the shockproof support frame 13. Heat dissipation holes are provided inside the shockproof support frame 13. The shockproof support frame 13 is arranged inside the cable, which improves the anti-extrusion performance of the power cable, thereby avoiding the external extrusion of the power cable, resulting in the breakage of the wire. A positioning tube 7 is arranged on one side of the first cable 1, and a positioning block 6 is fixed on the surface of the positioning tube 7. A thread 9 is fixed on one side of the positioning tube 7. The setting of the thread 9 connects the positioning tube 7 with the connecting tube 3, thereby improving the tightness of the device connection.

[0031] Reference Figure 2 and Figure 4 The outer side of the thread 9 is connected with a connecting tube 3, a positioning groove 5 is provided on the surface of the connecting tube 3, a heat dissipation ring 10 is provided inside the connecting tube 3, and a second cable 2 is provided on one side of the connecting tube 3. By rotating the positioning tube 7, the positioning block 6 is engaged with the positioning groove 5, which enhances the stability of the connection between the positioning tube 7 and the connecting tube 3. The setting of the heat dissipation ring 10 improves the heat dissipation efficiency of the cable. A fastening screw 2 8 is threadedly connected to one side of the positioning tube 7, and a fastening screw 4 is threadedly connected to one side of the connecting tube 3. The fastening screw 4 A rotating bearing 19 is connected to one side of the rotating bearing 19, a clamping block 17 is fixed to one side of the clamping block 17, a clamping block 2 18 is arranged on one side of the clamping block 17, a silicone rubber pad 20 is fixed to one side of the clamping block 2 18, by rotating the fastening screw 4, the fastening screw 4 drives the clamping block 17 and the clamping block 2 18 to move toward the direction of the second cable 2 with the cooperation of the rotating bearing 19, so as to facilitate the clamping of the second cable 2, and the device can be adjusted according to the width of different cables, thereby improving the working effect, facilitating disassembly at any time, and improving the working efficiency.

[0032] The implementation principle of the utility model is as follows: first, the positioning tube 7 is rotated, and the positioning tube 7 is connected to the connecting tube 3 through the thread 9, so that the positioning block 6 is engaged with the positioning groove 5, and the first cable 1 is connected to the second cable 2, and then the fastening screw 1 4 and the fastening screw 2 8 are rotated. The fastening screw 1 4 drives the clamping block 1 17 and the clamping block 2 18 to move in the direction of the second cable 2 under the cooperation of the rotating bearing 19, so as to facilitate the clamping of the second cable 2. The clamping block 1 17 and the clamping block 2 18 are provided with a silicone rubber pad 20 inside. The device can be adjusted according to the width of different cables. The heat dissipation ring 10 is arranged at the cable connection to improve the heat dissipation efficiency of the cable. The insulating layer 15 arranged on the outside of the metal conductor core 16 isolates the live conductor to prevent current leakage, short circuit and other electrical accidents, thereby enhancing the service life of the cable. A shockproof support frame 13 is fixed inside the cable to improve the anti-extrusion performance of the power cable, thereby avoiding the external extrusion of the power cable, which leads to the breakage of the wire. Finally, the device is provided with a flame retardant sheath layer 11, a cross-linked polyethylene insulation layer 12 and a waterproof layer 14, so that the device has good flame retardant, fire resistant and waterproof properties.

[0033] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A highly flame-retardant and fire-resistant power cable, comprising a first cable (1), characterized in that: The surface of the first cable (1) is provided with a low-smoke halogen-free polyolefin sheath, and one side of the low-smoke halogen-free polyolefin sheath is provided with a polyurethane waterproof coating; The polyurethane waterproof coating is provided with a flame retardant sheath layer (11) inside, a cross-linked polyethylene insulation layer (12) is provided on one side of the flame retardant sheath layer (11), a graphene coating is provided on one side of the cross-linked polyethylene insulation layer (12), an aluminum sleeve isolation layer is provided on one side of the graphene coating, and a polypropylene mesh belt filling layer is provided on one side of the aluminum sleeve isolation layer.

2. A highly flame retardant and fire resistant power cable according to claim 1, characterized in that: An insulating layer (15) is arranged inside the polypropylene mesh belt filling layer, and a metal conductor core (16) is arranged inside the insulating layer (15).

3. A highly flame retardant and fire resistant power cable according to claim 2, characterized in that: A shockproof support frame (13) is provided on one side of the metal conductor core (16), a waterproof layer (14) is provided inside the shockproof support frame (13), and a heat dissipation hole is provided inside the shockproof support frame (13).

4. A highly flame retardant and fire resistant power cable according to claim 1, characterized in that: A positioning tube (7) is provided on one side of the first cable (1), a positioning block (6) is fixed on the surface of the positioning tube (7), and a thread (9) is fixed on one side of the positioning tube (7).

5. A highly flame retardant and fire resistant power cable according to claim 4, characterized in that: A connecting pipe (3) is arranged on the outside of the thread (9), a positioning groove (5) is provided on the surface of the connecting pipe (3), a heat dissipation ring (10) is arranged inside the connecting pipe (3), and a second cable (2) is arranged on one side of the connecting pipe (3).

6. A highly flame retardant and fire resistant power cable according to claim 5, characterized in that: One side of the positioning tube (7) is threadedly connected to a fastening screw 2 (8), one side of the connecting tube (3) is threadedly connected to a fastening screw 1 (4), one side of the fastening screw 1 (4) is connected to a rotating bearing (19), one side of the rotating bearing (19) is fixed with a clamping block 1 (17), one side of the clamping block 1 (17) is provided with a clamping block 2 (18), and one side of the clamping block 2 (18) is fixed with a silicone rubber pad (20).

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