Super-flexible mineral insulated fireproof power cable

Abstract

The utility model relates to the technical field of cables, and particularly discloses a super-flexible mineral insulated fireproof power cable, which comprises a wire core, a fire insulation layer arranged on the outer side of the wire core, a wrapping layer wrapped on the outer side of the fire insulation layer, a soaking layer wrapped on the outer side of the wrapping layer, and a protective layer wrapped on the outer side of the soaking layer. The soaking layer comprises a connecting sleeve, a plurality of heat conducting plates are fixedly connected into the connecting sleeve, a soaking plate is fixedly connected to one end of each heat conducting plate and embedded into the connecting sleeve, and the other end of each heat conducting plate penetrates through the protective layer to be attached to the outer side of the protective layer. According to the utility model, the temperature of the outer side of the cable can be transmitted to the peripheral side of the fire insulation layer through the heat conduction plate, so that when the outer protection layer is damaged by fire, the internal fire insulation layer is porcelainized and reacts quickly. The heat is uniformly transmitted to the peripheral side of the fire insulation layer through the soaking layer, so that the fire insulation layer can be uniformly hardened to form porcelain in the process that the cable is damaged by fire, cracks are prevented from being generated in the porcelain process, and the protection failure is avoided.

Description

Technical Field

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

[0002] Mineral insulated cable, which uses solid copper conductor as the core, copper or copper alloy as the metal sheath, and compacted mineral powder as the insulation layer between the core and the metal sheath. An organic outer sheath can be optionally extruded outside the metal sheath. The most significant difference from traditional cables is that the insulation material of mineral insulated cables is composed of mineral powder, which directly determines the electrical performance and fire resistance of mineral insulated cables.

[0003] The material of the fireproof layer is mainly a fireproof insulating polymer-based composite material of a fast-ceramic fireproof cable, which can be quickly ceramicized at low temperature to protect the internal wire core. However, during a fire, when the fire damages the cable, the fireproof layer is heated to ceramics. Due to the uneven heating temperature, stress concentration occurs, which may cause cracks in the ceramicized material. Therefore, those skilled in the art provide an ultra-flexible mineral insulated fireproof power cable to solve the problems raised in the above background technology. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an ultra-flexible mineral insulated fireproof power cable, comprising a wire core, a fire insulation layer is arranged on the outer side of the wire core, a wrapping layer is coated on the outer side of the fire insulation layer, a heat-saturating layer is coated on the outer side of the wrapping layer, and a protective layer is coated on the outer side of the heat-saturating layer;

[0005] The heat-spreading layer comprises a connecting sleeve, a plurality of heat-conducting plates are fixedly connected inside the connecting sleeve, one end of the heat-conducting plate is fixedly connected to the heat-spreading plate, the heat-spreading plate is embedded in the connecting sleeve, and the other end of the heat-spreading plate passes through the protective layer and fits the outer side of the protective layer.

[0006] Preferably, the outer side of the wire core is covered with an insulating layer 1 and an insulating layer 2, the insulating layer 1 is a mica tape, and the insulating layer 2 is plastic.

[0007] Preferably, the fire-insulating layer is a polymer-based thermally conductive insulating composite material.

[0008] Preferably, the wrapping layer is an inorganic refractory wrapping tape.

[0009] Preferably, the connecting sleeve is a plastic sleeve, and the heat spreader and the heat conducting plate are heat conducting metals.

[0010] Preferably, the protective layer is a plastic sheath.

[0011] Preferably, a plurality of wear-resistant strips are arranged on the outer side of the protective layer, and the wear-resistant strips are spaced apart from the heat conducting plate.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The utility model is designed with a heat conducting plate, through which the temperature of the outer side of the cable can be transferred to the surrounding side of the fire insulation layer, so that when the fire destroys the outer protective layer, the internal fire insulation layer has been vitrified, so that a quick response to the fire can be achieved.

[0014] 2. The utility model is designed with a heat-averaging layer, which evenly transfers heat to the surrounding side of the fire-insulating layer, so that when the fire breaks the cable, the fire-insulating layer can be evenly hardened into porcelain, avoiding cracks in the porcelain process, which would lead to protection failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure provided by this application;

[0016] Figure 2 It is a schematic diagram of the structure of the wire core provided by the present application;

[0017] Figure 3 It is a schematic diagram of the structure of the heat-saturating layer provided in this application;

[0018] Figure 4 It is a structural schematic diagram of the heat conducting plate provided in this application;

[0019] In the figure:

[0020] 1. Wire core; 11. Insulation layer one; 12. Insulation layer two; 2. Fireproof layer; 3. Wrapping layer; 4. Heat-saturating layer; 41. Connecting sleeve; 42. Heat-saturating plate; 43. Heat-conducting plate; 5. Protective layer; 51. Wear-resistant strip. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 4 In this embodiment, an ultra-flexible mineral insulated fireproof power cable is provided, comprising a core 1, a fireproof layer 2 is arranged on the outer side of the core 1, a wrapping layer 3 is coated on the outer side of the fireproof layer 2, a heat-saturating layer 4 is coated on the outer side of the wrapping layer 3, and a protective layer 5 is coated on the outer side of the heat-saturating layer 4;

[0023] The heat-averaging layer 4 includes a connecting sleeve 41 , and a plurality of heat-conducting plates 43 are fixedly connected inside the connecting sleeve 41 . A heat-averaging plate 42 is fixedly connected to one end of the heat-averaging plate 43 . The heat-averaging plate 42 is embedded in the connecting sleeve 41 . The other end of the heat-conducting plate 43 passes through the protective layer 5 and fits against the outer side of the protective layer 5 .

[0024] When in use, the temperature of the outer side of the cable can be transferred to the surrounding side of the fire insulation layer through the heat conduction plate, so that when the fire destroys the outer protective layer, the internal fire insulation layer has been vitrified, thereby enabling a quick response to the fire.

[0025] Heat is evenly transferred to the surrounding side of the fire insulation layer through the heat-averaging layer, so that the fire insulation layer can be evenly hardened into porcelain during the process of fire breaking the cable, avoiding cracks in the porcelain process, which would lead to protection failure.

[0026] In further embodiments, see Figure 2 The outer side of the core 1 is coated with an insulating layer 11 and an insulating layer 2 12, wherein the insulating layer 11 is a mica tape and the insulating layer 2 12 is a plastic. The mica tape has excellent high temperature resistance and combustion resistance.

[0027] In further embodiments, see Figure 1 The fire-insulating layer 2 is a polymer-based thermally conductive insulating composite material.

[0028] In further embodiments, see Figure 1 , the wrapping layer 3 is an inorganic refractory wrapping tape.

[0029] In further embodiments, see Figure 3 The connecting sleeve 41 is a plastic sleeve, and the heat spreader 42 and the heat conducting plate 43 are heat conducting metals.

[0030] In further embodiments, see Figure 1 , the protective layer 5 is a plastic sheath.

[0031] In further embodiments, see Figure 4 A plurality of wear-resistant strips 51 are arranged outside the protective layer 5, and the wear-resistant strips 51 are spaced apart from the heat conducting plate 43. The wear-resistant strips 51 increase the wear resistance of the cable during the mobile installation process, and when burning, the burning time outside the fire insulation layer can also be increased.

[0032] 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. An ultra-flexible mineral insulated fireproof power cable, comprising a core (1), characterized in that: The outer side of the wire core (1) is provided with a fire insulation layer (2), the outer side of the fire insulation layer (2) is covered with a wrapping layer (3), the outer side of the wrapping layer (3) is covered with a heat-dissipating layer (4), and the outer side of the heat-dissipating layer (4) is covered with a protective layer (5); The heat-averaging layer (4) includes a connecting sleeve (41), a plurality of heat-conducting plates (43) are fixedly connected to the interior of the connecting sleeve (41), one end of the heat-conducting plate (43) is fixedly connected to a heat-averaging plate (42), the heat-averaging plate (42) is embedded in the connecting sleeve (41), and the other end of the heat-conducting plate (43) passes through the protective layer (5) and is bonded to the outside of the protective layer (5).

2. The ultra-flexible mineral insulated fire-resistant power cable according to claim 1, characterized in that: The outer side of the wire core (1) is covered with an insulating layer 1 (11) and an insulating layer 2 (12), wherein the insulating layer 1 (11) is a mica tape and the insulating layer 2 (12) is plastic.

3. The ultra-flexible mineral insulated fire-resistant power cable according to claim 1, characterized in that: The fire insulation layer (2) is a polymer-based heat-conducting and insulating composite material.

4. The ultra-flexible mineral insulated fire-resistant power cable according to claim 1, characterized in that: The wrapping layer (3) is an inorganic fire-resistant wrapping tape.

5. The ultra-flexible mineral insulated fire-resistant power cable according to claim 1, characterized in that: The connecting sleeve (41) is a plastic sleeve, and the heat-sinking plate (42) and the heat-conducting plate (43) are made of heat-conducting metal.

6. The ultra-flexible mineral insulated fire-resistant power cable according to claim 1, characterized in that: The protective layer (5) is a plastic sheath.

7. The ultra-flexible mineral insulated fire-resistant power cable according to claim 1, characterized in that: A plurality of wear-resistant strips (51) are provided on the outside of the protective layer (5), and the wear-resistant strips (51) are spaced apart from the heat conducting plate (43).

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