A fireproof cable with high heat dissipation performance

Abstract

A fire-resistant cable with high heat dissipation performance provided by the present invention comprises a cable core, wherein the cable core is formed by stranding insulating wire cores. Each insulating wire core includes a conductor, and an insulating layer is wrapped around the conductor. A filling layer is provided in the gap between a predetermined number of the insulating wire cores. An extinguishing layer, an inner flame retardant layer, a fireproof layer and an outer flame retardant layer are arranged outside the filling layer, so that the fire-resistant cable has good heat resistance, flame retardancy, fireproofing and extinguishing characteristics, and provides multiple protections for the cable core to prevent the conductor in the cable core from being burned out. At the same time, a predetermined number of inner heat dissipation holes are arranged at intervals along the circumference of the fireproof layer and penetrate through the fireproof layer. A predetermined number of outer heat dissipation holes sequentially penetrate through the outer flame retardant layer and the outer sheath, and are arranged at intervals along the circumferences of the outer flame retardant layer and the outer sheath. The heat inside the cable is first dissipated through the inner heat dissipation holes, and at the same time, the heat further diffuses outwards through the outer heat dissipation holes, improving the heat dissipation performance of the fire-resistant cable and reducing potential safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of wire and cable, and in particular to a fire-resistant cable with high heat dissipation performance. Background Art

[0002] In recent years, in order to improve the safety level of electrical circuits, reduce the occurrence and losses of electrical fire accidents, the Ministry of Construction, the Ministry of Public Security of the country and some local governments have successively issued some electrical design specifications, and clearly stipulated that high heat dissipation performance fire-resistant cables must be used in some important electrical circuits and places, thus further broadening the application scope of high heat dissipation performance fire-resistant cables.

[0003] Existing ordinary fire-resistant cables only have a layer of fire-resistant insulation layer, and the fire prevention efficiency is limited. Moreover, when ordinary fire-resistant cables are used for a long time, certain heat will be generated. Due to the absence of a heat dissipation mechanism, after long-term use, it will not only affect the transmission efficiency of cable information but also may lead to the occurrence of a fire.

[0004] On May 4, 2017, a Chinese invention patent with an application number of CN201720483540.9 disclosed a new type of wear-resistant cable, which includes a cable core formed by stranding multiple insulated wire cores. An inner protective shell is wrapped around the outer periphery of the cable core, an insulating layer is wrapped around the outer side of the inner protective shell, a PVC protective layer is wrapped around the outer side of the insulating layer, and a plurality of annular concave grooves are uniformly arranged on the outer surface of the PVC protective layer along the length direction, and a nano-ceramic resin hardening layer is uniformly coated in the annular concave grooves. By making the high-hardness and wear-resistant nano-inorganic ceramic resin form rings at intervals on the outer side of the cable, the present invention can effectively prevent further wear of the cable during the dragging process, and since the nano-inorganic ceramic resin is cured into rings on the cable surface, the production process is simpler and will not affect the bending and winding of the cable. However, its fire prevention performance is poor and it does not include the setting of a heat dissipation module, resulting in easy overheating. Summary of the Invention

[0005] The purpose of the present invention is to provide a high heat dissipation performance fire-resistant cable with good fire prevention performance and high heat dissipation performance.

[0006] A fire-resistant cable with high heat dissipation performance, comprising a cable core, the cable core is stranded by a predetermined number of insulated wire cores, the insulated wire core includes a conductor, an insulating layer is wrapped outside the conductor, a filling layer is provided in the gap between the predetermined number of insulated wire cores, a separation layer, a fire extinguishing layer, an inner flame retardant layer, a fireproof layer, an outer flame retardant layer and an outer sheath are sequentially provided outside the filling layer, a cavity is formed between the fireproof layer and the outer flame retardant layer, an elastic material is arranged at a predetermined interval along the circumference of the cavity, wherein, a predetermined number of inner heat dissipation holes are arranged at intervals along the circumference of the fireproof layer and penetrate through the fireproof layer, a predetermined number of outer heat dissipation holes sequentially penetrate through the outer flame retardant layer and the outer sheath, and are arranged at intervals along the circumferences of the outer flame retardant layer and the outer sheath.

[0007] Preferably, both the inner heat dissipation holes and the outer heat dissipation holes are filled with fireproof breathable materials, and waterproof breathable membranes are provided at the ends of the inner heat dissipation holes and the outer heat dissipation holes far from the cable core.

[0008] Preferably, the insulating layer is a ceramized low-smoke and halogen-free polyolefin material insulating layer, serving as the insulating material between conductors.

[0009] Preferably, the filling layer is a halogen-free flame retardant filling layer, which can play a certain flame retardant effect while ensuring the roundness of the cable.

[0010] Preferably, the separation layer is one of an aluminum alloy tube separation layer or an aluminum tube separation layer. The aluminum alloy tube separation layer or the aluminum tube separation layer has a high melting point and good fireproof performance. When a fire occurs, it can isolate the insulated wire core from the flame, and play a role in fixing the inner filling layer, improving the anti-seismic and anti-compressive performance of the cable, avoiding damage caused by vibration and impact, and at the same time isolating the insulated wire core from water and water vapor, making the cable have excellent waterproof performance.

[0011] Preferably, both the inner flame retardant layer and the outer flame retardant layer are high flame retardant glass fiber tape wrapping layers. At a certain temperature, the high flame retardant glass fiber tape can decompose into metal oxides and precipitate crystal water, playing a role in adsorbing smoke, settling smoke particles, absorbing heat, hindering the flow of oxygen and combustible gases, and thus can prevent the further combustion of the cable.

[0012] Preferably, the elastic material is one of a thermoplastic polyurethane elastic sphere or a spring. It makes the cable have good compressive performance.

[0013] Preferably, the fireproof layer is made of a fireproof material containing magnetic powder, magnesium oxide and ceramics. It has excellent fireproof performance.

[0014] Preferably, the fire extinguishing layer includes an inner refractory film and an outer refractory film. The inner refractory film and the outer refractory film are separated by a predetermined number of diaphragms into several cavities arranged in an array, and the cavities are filled with a fire extinguishing agent. The fire extinguishing agent in the fire extinguishing layer can play the role of extinguishing fire and flame retardancy, preventing the cable core from being damaged.

[0015] Preferably, the outer sheath is a cross-linked polyolefin outer sheath.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The high heat dissipation performance fireproof cable provided by the present invention has good heat resistance, flame retardancy, fire prevention and fire extinguishing characteristics by setting a fire extinguishing layer, an inner flame retardant layer, a fireproof layer and an outer flame retardant layer, providing multiple protections for the cable core and avoiding the conductors in the cable core from being burned out. At the same time, a predetermined number of inner heat dissipation holes are arranged at intervals along the circumference of the fireproof layer and penetrate through the fireproof layer, and a predetermined number of outer heat dissipation holes sequentially penetrate through the outer flame retardant layer and the outer sheath and are arranged at intervals along the circumferences of the outer flame retardant layer and the outer sheath. The heat inside the cable is first dissipated through the inner heat dissipation holes, and at the same time, the heat further diffuses out through the outer heat dissipation holes, improving the heat dissipation performance of the fireproof cable and reducing potential safety hazards. Therefore, the fireproof cable can withstand for 3 hours at a high temperature of 850 degrees by setting fire prevention and heat dissipation, and has good high-temperature working performance. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the high heat dissipation performance fireproof cable provided by the present invention. Detailed Embodiments

[0018] The following described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Refer to Figure 1 , a high heat dissipation performance fireproof cable, including a cable core 1, and the cable core 1 is formed by stranding a predetermined number of insulated wire cores 11. In this embodiment, the number of the insulated wire cores 11 is 4. The insulated wire core 11 includes a conductor 111, an insulating layer 112 is wrapped outside the conductor 111, a filling layer 13 is arranged in the gap between a predetermined number of the insulated wire cores 11, and a separating layer 2, a fire extinguishing layer 3, an inner flame retardant layer 4, a fireproof layer 5, an outer flame retardant layer 6 and an outer sheath 7 are sequentially arranged outside the filling layer 13.

[0020] In this embodiment, a cavity 8 is formed between the fireproof layer 5 and the outer flame-retardant layer 6. An elastic material 9 is disposed at a predetermined interval along the circumference of the cavity 8. The elastic material 9 is one of a thermoplastic polyurethane elastic sphere or a spring. During the transportation of the cable, etc., the cable is easily compressed, which may cause the internal cable core 1 to be easily damaged. The elastic material 9 is provided in this fireproof cable to enable the cable to have good compressive performance, and the internal cable core 1 is well protected.

[0021] This high heat dissipation performance fireproof cable has good heat dissipation performance by providing a predetermined number of internal heat dissipation holes 10 and a predetermined number of external heat dissipation holes 20. The internal heat dissipation holes 10 are arranged at intervals along the circumference of the fireproof layer 5 and penetrate through the fireproof layer 5. The external heat dissipation holes 20 sequentially penetrate through the outer flame-retardant layer 6 and the outer sheath 7, and are arranged at intervals along the circumferences of the outer flame-retardant layer 6 and the outer sheath 7. The heat inside the cable is first dissipated through the internal heat dissipation holes 10. The heat is dissipated to the cavity 8, and at the same time, the heat at the cavity 8 is further diffused outward through the external heat dissipation holes 20, improving the heat dissipation of the fireproof cable and reducing potential safety hazards. Preferably, fireproof breathable materials are filled in both the internal heat dissipation holes 10 and the external heat dissipation holes 20, so that heat can be dissipated from the internal heat dissipation holes 10 and the external heat dissipation holes 20 and has good fireproof performance. And waterproof breathable membranes are provided at the ends of the internal heat dissipation holes 10 and the external heat dissipation holes 20 far from the cable core 1. The waterproof breathable membranes enable the heat dissipation holes to dissipate heat and also have good waterproof performance. The number of internal heat conduction holes is 4 to 8, and the external heat conduction holes correspond to the internal heat conduction holes.

[0022] Preferably, the insulating layer 112 is a ceramifiable low-smoke and halogen-free polyolefin material insulating layer 112, serving as the insulating material between the conductors 111. The filling layer 13 is a halogen-free flame-retardant filling layer 13, which can achieve a certain flame-retardant effect while ensuring the roundness of the cable. The isolating layer 2 is one of an aluminum alloy tube isolating layer 2 or an aluminum tube isolating layer 2. The aluminum alloy tube isolating layer 2 or the aluminum tube isolating layer 2 has a high melting point and good fireproof performance. When a fire occurs, it can isolate the insulated wire core 11 from the flame, and play a role in fixing the inner filling layer 13, improving the anti-seismic and anti-compressive performance of the cable, avoiding damage caused by vibration and impact, and at the same time isolating the insulated wire core 11 from water and water vapor, making the cable have excellent waterproof performance. Both the inner flame-retardant layer 4 and the outer flame-retardant layer 6 are high-flame-retardant glass fiber tape wrapping layers. The high-flame-retardant glass fiber tape can decompose into metal oxides and precipitate crystal water at a certain temperature, playing a role in adsorbing smoke, settling smoke particles, absorbing heat, hindering the flow of oxygen and combustible gases, and thus can prevent the further combustion of the cable. The fireproof layer 5 is made of a fireproof material containing magnetic powder, magnesium oxide, and ceramics, having excellent fireproof performance. The fire extinguishing layer 3 includes an inner refractory film and an outer refractory film. The inner refractory film and the outer refractory film are separated by a predetermined number of diaphragms 21 into several cavities 22 arranged in an array, and the cavities 22 are filled with a fire extinguishing agent. The fire extinguishing agent in the fire extinguishing layer 3 can achieve the effect of extinguishing fire and flame retardancy, preventing the cable core 1 from being damaged. The outer sheath 7 is a cross-linked polyolefin outer sheath 7, having good wear resistance.

[0023] The high heat dissipation performance fireproof cable provided by the present invention has the characteristics of good heat resistance, flame retardancy, fire prevention, and fire extinguishing by setting the fire extinguishing layer 3, the inner flame-retardant layer 4, the fireproof layer 5, and the outer flame-retardant layer 6, providing multiple protections for the cable core 1 and preventing the conductors 111 in the cable core 1 from being burned out. At the same time, a predetermined number of inner heat dissipation holes 10 are arranged at intervals along the circumference of the fireproof layer 5 and penetrate through the fireproof layer 5, and a predetermined number of outer heat dissipation holes 20 sequentially penetrate through the outer flame-retardant layer 6 and the outer sheath 7 and are arranged at intervals along the circumferences of the outer flame-retardant layer 6 and the outer sheath 7. The heat inside the cable is first dissipated through the inner heat dissipation holes 10, and at the same time, the heat is further diffused outward through the outer heat dissipation holes 20, improving the heat dissipation performance of the fireproof cable and reducing potential safety hazards. Therefore, the fireproof cable can withstand 3 hours at a high temperature of 850 degrees by setting fire prevention and heat dissipation, having good high-temperature working performance.

[0024] The above-disclosed are only several preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A fireproof cable with high heat dissipation performance, characterized in that: It includes a cable core, the cable core is stranded by a predetermined number of insulated wire cores, the insulated wire core includes a conductor, an insulating layer is wrapped outside the conductor, a filling layer is provided in the gap between the predetermined number of insulated wire cores, and a separation layer, a fire extinguishing layer, an inner flame retardant layer, a fireproof layer, an outer flame retardant layer and an outer sheath are sequentially provided outside the filling layer. A cavity is formed between the fireproof layer and the outer flame retardant layer, and an elastic material is arranged at a predetermined interval along the circumference of the cavity. Among them, a predetermined number of inner heat dissipation holes are arranged at intervals along the circumference of the fireproof layer and penetrate through the fireproof layer, and a predetermined number of outer heat dissipation holes sequentially penetrate through the outer flame retardant layer and the outer sheath and are arranged at intervals along the circumferences of the outer flame retardant layer and the outer sheath. The inner heat dissipation holes and the outer heat dissipation holes are both filled with fireproof breathable materials, and waterproof breathable membranes are provided at the ends of the inner heat dissipation holes and the outer heat dissipation holes far away from the cable core. The fire extinguishing layer includes an inner refractory membrane and an outer refractory membrane, and the inner refractory membrane and the outer refractory membrane are separated into several cavity arrays arranged in an array by a predetermined number of diaphragms, and fire extinguishing agents are filled in the cavities.

2. The high heat dissipation performance fireproof cable according to claim 1, characterized in that, The insulating layer is a ceramized low-smoke and halogen-free polyolefin material insulating layer.

3. The high heat dissipation performance fireproof cable according to claim 1, characterized in that, The filling layer is a halogen-free flame retardant filling layer.

4. The high heat dissipation performance fireproof cable according to claim 1, characterized in that, The separation layer is one of an aluminum alloy tube separation layer or an aluminum tube separation layer.

5. The high heat dissipation performance fireproof cable according to claim 1, characterized in that, Both the inner flame retardant layer and the outer flame retardant layer are high flame retardant glass fiber tape winding layers.

6. The high heat dissipation performance fireproof cable according to claim 1, characterized in that, The elastic material is one of a thermoplastic polyurethane elastic sphere or a spring.

7. The high heat dissipation performance fireproof cable according to claim 1, characterized in that, The fireproof layer is made of a fireproof material containing magnetic powder, magnesium oxide and ceramics.

8. The high heat dissipation performance fireproof cable according to claim 1, characterized in that, The outer sheath is a cross-linked polyolefin outer sheath.

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