Staged flame-retardant voltage-resistant insulated fireproof cable

Abstract

The staged flame-retardant pressure-resistant insulated fireproof cable comprises a core body and a sheath, a first insulating layer and a protective layer are tightly wound and wrapped between the core body and the sheath from inside to outside in sequence, and the protective layer comprises flame-retardant parts and pressure reduction parts which are arranged at intervals along the length direction of the cable. According to the utility model, fire spreading can be effectively prevented through the flame-retardant part, and compression of external force on the cable inner core can be effectively slowed down through the pressure reduction part, so that the staged flame-retardant and compression-resistant performance of the cable is improved.

Description

Technical Field

[0001] The utility model relates to the field of cables, in particular to a staged flame-retardant, pressure-resistant, insulated and fire-proof cable. Background Art

[0002] Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of the power system, including 1-500KV and above various voltage levels, various insulation power cables. With the continuous improvement and development of the country's modern industry and the continuous increase in urbanization rate, the electricity consumption of all walks of life has increased sharply, which will drive the vigorous development of the power transmission industry. As the main carrier for transmitting electricity, the quality requirements of power cables will also be improved simultaneously.

[0003] Therefore, the current-carrying capacity and environmental protection, flame retardancy and fire resistance of traditional cables need to be improved simultaneously. However, during the transportation, installation and use of current cables, the cable core may be deformed due to external forces, affecting power transmission. In the event of a fire, the fire is often not controlled in time, resulting in further expansion of the fire through the cables, seriously affecting the safety of the use point.

[0004] Based on the above technical problems, there is an urgent need for a power cable with high flame retardancy and high protection. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a staged flame-retardant pressure-resistant insulation fireproof cable which has a simple structure, low cost and easy operation.

[0006] The utility model discloses a staged flame-retardant pressure-resistant insulated fireproof cable, comprising a core body and an outer skin, wherein the core body and the outer skin are tightly wrapped with a first insulating layer and a protective layer in sequence from the inside to the outside, and the characteristic is that the protective layer comprises a flame-retardant part and a pressure-reducing part arranged at intervals along the length direction of the cable.

[0007] As a further optimization option, the flame retardant part includes a fastening ring, a through hole, and a flame retardant. The fastening ring is tightly sleeved on the outer surface of the first insulating layer. The side wall of the fastening ring is evenly provided with a plurality of through holes, and the through holes are filled with the flame retardant.

[0008] As a further optimization option, the pressure relief part includes an isolation ring and a mesh ring. The isolation ring is tightly mounted on the outer surface of the first insulating layer. One end face of the isolation ring is tightly fitted with the end face of the fastening ring, and the other end face of the isolation ring is tightly fitted with one end face of the mesh ring. The other end face of the mesh ring is tightly fitted with the end face of another isolation ring, and the mesh ring is tightly mounted on the outer surface of the first insulating layer.

[0009] As a further optimization option, the side of the mesh ring adopts a honeycomb hollow layout, and the mesh ring is provided with a completely sealed inner cavity.

[0010] As a further optimization option, the core body includes a second insulating layer and a conductor core, the outer side of the conductor core is coated with the second insulating layer, and a plurality of the second insulating layers and the conductor core are twisted into a twist shape.

[0011] As a further optimization option, the material of the flame retardant can be antimony trioxide, magnesium hydroxide, or aluminum hydroxide.

[0012] As a further optimization option, the inner cavity can be filled with nitrogen, argon or helium.

[0013] The utility model is a phased flame retardant pressure-resistant insulated fireproof cable that is different from the prior art in that:

[0014] 1. The utility model is a staged flame-retardant pressure-resistant insulated fireproof cable. The fastening effect of the fastening ring can block the continuation of the fire in the first insulating layer to a certain extent. When the fire extends to the fastening ring, the flame retardant evenly distributed circumferentially of the fastening ring can further block the spread of the fire. In addition, through the discontinuous distribution of the flame-retardant part, its flame-retardant effect can be effectively exerted to maximize the flame-retardant effect.

[0015] 2. The utility model is a staged flame-retardant pressure-resistant insulated fire-proof cable that uses the isolation ring to separate the fastening ring and the mesh ring. Its purpose is that when a fire occurs in the cable, the isolation ring can block the fire to a certain extent for the first time during the transmission of the fire along the cable, and then the flame-retardant part can further block the fire. The double barrier ensures a higher success rate of flame retardancy, thereby avoiding the spread of fire.

[0016] 3. The utility model is a phased flame-retardant, pressure-resistant, fire-proof insulated cable. The mesh ring adopts a honeycomb-shaped hollowing and an internal cavity, which can greatly improve the elasticity of the mesh ring, ensure that during the transportation, installation and use of the cable, the pressure of the first insulating layer and the core body caused by external forces is relieved, and the possibility of deformation of the core body is reduced, thereby ensuring the power transmission performance of the cable.

[0017] The utility model is further described below with reference to the accompanying drawings, which is a staged flame-retardant, pressure-resistant, insulated and fire-proof cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an installation axonometric diagram of a staged flame-retardant, pressure-resistant, insulated, fire-resistant cable;

[0019] Figure 2 yes Figure 1 The end face front view of a staged flame retardant pressure-resistant insulation fireproof cable is shown;

[0020] Figure 3 yes Figure 1 The disassembly diagram of the components of a staged flame-retardant pressure-resistant insulation fire-proof cable is shown;

[0021] Figure 4 yes Figure 3 Cutaway axonometric view of some components;

[0022] Figure 5 yes Figure 4 A partial magnified view of area A in the middle;

[0023] Figure 6 yes Figure 4 A magnified partial view of area B.

[0024] In the figure: 100-core, 101-second insulating layer, 102-conductor core, 201-first insulating layer, 300-protective layer, 310-flame retardant part, 311-fastening ring, 312-through hole, 313-flame retardant, 320-decompression part, 321-isolating ring, 322-mesh ring, 323-inner cavity, 401-outer skin. DETAILED DESCRIPTION

[0025] like Figure 1 , 2 As shown in Figure 3, the utility model is a staged flame-retardant pressure-resistant insulated fire-proof cable comprising a core 100 and a sheath 401, wherein the core 100 and the sheath 401 are tightly wrapped with a first insulating layer 201 and a protective layer 300 from the inside to the outside, and the protective layer 300 comprises a flame-retardant portion 310 and a pressure-reducing portion 320 which are arranged at intervals along the length direction of the cable.

[0026] The core body 100 of the utility model ensures the transmission of electric power, the first insulating layer 201 can isolate the outside from the core body 100 to a certain extent, thereby achieving further insulation effect, the flame retardant part 310 in the protective layer 300 can ensure the flame retardant effect of the cable, and the decompression part 320 can ensure the compression resistance of the cable. The flame retardant part 310 and the decompression part 320 are arranged at intervals, which improves the overall compression resistance and phased flame retardancy of the cable.

[0027] As a further embodiment of the present invention, see Figure 4 , 5 ,

[0028] The flame retardant part 310 includes a fastening ring 311, a through hole 312, and a flame retardant 313. The fastening ring 311 is tightly sleeved on the outer surface of the first insulating layer 201. The side wall of the fastening ring 311 is evenly provided with a plurality of through holes 312, and the through holes 312 are all filled with the flame retardant 313.

[0029] The utility model adopts the fastening effect of the fastening ring 311, which can block the continuation of the fire in the first insulating layer 201 to a certain extent, and when the fire extends to the fastening ring 311, the flame retardant 313 uniformly distributed circumferentially of the fastening ring 311 can further block the spread of the fire. In addition, through the intermittent distribution of the flame retardant part 310, its flame retardant effect can be effectively exerted to maximize the flame retardant effect.

[0030] As a further embodiment of the present invention, see Figure 4 , 6 ,

[0031] The pressure reducing portion 320 includes an isolation ring 321 and a mesh ring 322. The isolation ring 321 is tightly sleeved on the outer surface of the first insulating layer 201. One end face of the isolation ring 321 is tightly fitted with the end face of the fastening ring 311. The other end face of the isolation ring 321 is tightly fitted with one end face of the mesh ring 322. The other end face of the mesh ring 322 is tightly fitted with the end face of another isolation ring 321. The mesh ring 322 is tightly sleeved on the outer surface of the first insulating layer 201.

[0032] The utility model separates the fastening ring 311 and the mesh ring 322 through the isolation ring 321. The purpose is that when a fire occurs in the cable, the isolation ring 321 can block the fire to a certain extent for the first time during the transmission of the fire along the cable, and then the flame retardant part 310 can further block the fire. The double barrier ensures a higher success rate of flame retardancy, thereby avoiding the spread of fire.

[0033] The side surface of the mesh ring 322 adopts a honeycomb hollow layout, and the mesh ring 322 is provided with a completely sealed inner cavity 323 .

[0034] The utility model adopts a honeycomb-shaped hollowing and internal cavity arrangement for the mesh ring 322, which can greatly improve the elasticity of the mesh ring 322, ensure that during the transportation, installation and use of the cable, the pressure of the first insulating layer 201 and the core 100 caused by external forces is relieved, and the possibility of deformation of the core 100 is reduced, thereby ensuring the power transmission performance of the cable.

[0035] As a further embodiment of the present invention, see Figure 1 ,2 ,

[0036] The core body 100 includes a second insulating layer 101 and a conductor core 102 . The outer side of the conductor core 102 is covered with the second insulating layer 101 . A plurality of the second insulating layers 101 and the conductor core 102 are twisted into a twist shape.

[0037] In the present invention, each of the conductor cores 102 is coated with the second insulating layer 101 to avoid current breakdown during use.

[0038] As a further embodiment of the present invention, see Figure 5 , 6 ,

[0039] The flame retardant 313 may be made of antimony trioxide, magnesium hydroxide, or aluminum hydroxide.

[0040] The utility model adopts inorganic flame retardants such as antimony trioxide, magnesium hydroxide, aluminum hydroxide, etc., to ensure that the flame retardant part 310 meets the flame retardant effect and is more environmentally friendly.

[0041] The inner cavity 323 can be filled with nitrogen, argon or helium.

[0042] The utility model can ensure that when the fire spreads, the nitrogen or argon, helium or other inert gas in the inner cavity 323 can block the fire to a certain extent.

[0043] In the description of this specification, the reference term "further embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0044] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A step-by-step flame-retardant, pressure-resistant, insulated, fire-proof cable, comprising a core (100) and an outer skin (401), wherein the core (100) and the outer skin (401) are tightly wrapped with a first insulating layer (201) and a protective layer (300) from inside to outside, characterized in that: The protective layer (300) comprises a flame retardant portion (310) and a pressure relief portion (320) which are arranged at intervals along the length direction of the cable.

2. The step-by-step flame-retardant pressure-resistant insulated fireproof cable according to claim 1, characterized in that: The flame retardant portion (310) comprises a fastening ring (311), a through hole (312), and a flame retardant (313); The fastening ring (311) is tightly sleeved on the outer surface of the first insulating layer (201), and a plurality of through holes (312) are evenly opened on the side wall of the fastening ring (311), and the through holes (312) are all filled with the flame retardant (313).

3. The step-by-step flame-retardant pressure-resistant insulated fireproof cable according to claim 2, characterized in that: The decompression portion (320) comprises an isolation ring (321) and a mesh ring (322); The isolation ring (321) is tightly sleeved on the outer surface of the first insulating layer (201), one end face of the isolation ring (321) is tightly fitted with the end face of the fastening ring (311), the other end face of the isolation ring (321) is tightly fitted with one end face of the mesh ring (322), the other end face of the mesh ring (322) is tightly fitted with the end face of another isolation ring (321), and the mesh ring (322) is tightly sleeved on the outer surface of the first insulating layer (201).

4. The step-by-step flame-retardant pressure-resistant insulated fireproof cable according to claim 3, characterized in that: The side surface of the mesh ring (322) adopts a honeycomb hollow layout, and the mesh ring (322) is provided with a completely sealed inner cavity (323).

5. A step-by-step flame-retardant, pressure-resistant, insulated, fire-resistant cable according to any one of claims 1 to 4, characterized in that: The core body (100) comprises a second insulating layer (101) and a conductor core (102); The outer side of the conductor core (102) is coated with the second insulating layer (101), and a plurality of the second insulating layers (101) and the conductor core (102) are twisted into a twist shape.

6. The step-by-step flame-retardant pressure-resistant insulated fireproof cable according to claim 2, characterized in that: The flame retardant (313) may be made of antimony trioxide, magnesium hydroxide, or aluminum hydroxide.

7. The step-by-step flame-retardant pressure-resistant insulated fireproof cable according to claim 4, characterized in that: The inner cavity (323) can be filled with nitrogen, argon or helium.

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