Aerogel thermal band structure for cable fire protection

Abstract

The utility model discloses a cable fire -prevention aerogel heat -insulation band structure, be applied to the opposite side of cable core and cable shell, include: insulating layer, aerogel isolation layer and fire -retardant subassembly, the insulating layer is set to the outside of cable core, aerogel isolation layer sets up in the insulating layer outside, fire -retardant subassembly includes the reflection foil layer, the reflection foil layer is set to the outside of aerogel isolation layer, the reflection foil layer opposite side with aerogel isolation layer is provided with the occlusion part, and the outside of reflection foil layer is provided with the protection part, the utility model discloses the outside of cable core in proper order provided with insulating layer, aerogel isolation layer and fire -retardant subassembly, and the reflection foil layer is strengthened through the occlusion part and is set to the outside of aerogel isolation layer, and the reflection foil layer outside is provided with the protection part, compares with single layer polyvinyl chloride layer fire -retardant, and the design composite collocation's aerogel isolation layer and fire -retardant subassembly all have the heat -insulating fire -retardant function, avoided single polyvinyl chloride layer damage, and the cable is easy to burn and the condition of the fire of heating.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to an aerogel insulation heat pipe structure for fireproofing cables. Background Technology

[0002] In the field of fire protection for cables in power transmission and high-risk locations, traditional cables rely on a single layer of polyvinyl chloride (PVC) flame-retardant layer for flame protection.

[0003] However, the mechanical strength of a single flame-retardant layer is limited. If it is damaged by external forces or cracked due to aging, the polyvinyl chloride (PVC) flame-retardant layer cannot play its role in isolating and protecting against flames. The cable core is directly exposed and is easily exposed to external moisture, which can cause a short circuit and lead to a fire.

[0004] Therefore, in order to solve the problem that cables are prone to combustion and fire after the single PVC flame retardant layer is damaged, an aerogel insulation heat pipe structure for cable fire protection is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an aerogel insulation heat pipe structure for fireproof cables, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an aerogel insulating heat pipe structure for fireproofing cables, applied to the opposite side of the cable core and the cable sheath, comprising:

[0007] An insulating layer, which is sleeved on the outside of the cable core;

[0008] An aerogel insulating layer is disposed on the outside of the insulating layer, and the aerogel insulating layer is used for moisture-proof and heat-insulating purposes of the insulating layer.

[0009] A flame-retardant component is used to isolate an external heat source. The flame-retardant component includes a reflective foil layer, which is sleeved on the outside of an aerogel isolation layer. An interlocking part is provided on the opposite side of the reflective foil layer and the aerogel isolation layer to increase the connection strength between the two. A protective part is provided on the outside of the reflective foil layer to protect the reflective foil layer.

[0010] Preferably, the aerogel insulating layer comprises:

[0011] An aerogel moisture-proof layer is sleeved on the outside of the insulation layer and is used to block the transmission of moisture.

[0012] An aerogel insulation layer is fitted over the outer side of the aerogel moisture-proof layer, and the aerogel insulation layer is used to block the conduction of external heat.

[0013] Preferably, the occlusal portion includes:

[0014] Displaced protrusions, multiple of which are formed on the outer side of the aerogel insulation layer;

[0015] The misaligned grooves are formed on the inner wall of the reflective foil layer, and the misaligned protrusions are misaligned with the misaligned grooves. The misaligned grooves are used to enhance the connection strength between the aerogel insulation layer and the reflective foil layer.

[0016] Preferably, the protective part includes a flame-retardant layer, which is sleeved on the outside of the reflective foil layer and sleeved on the inner cavity of the cable shell.

[0017] Preferably, the outer side of the flame-retardant layer is provided with a plurality of annular protrusions, the sides of which are inserted and connected to the inner wall of the cable shell.

[0018] Preferably, the outer side of the cable shell is provided with an annular groove, which is used for the insertion of the annular protrusion.

[0019] The technical effects and advantages of this utility model are as follows:

[0020] This invention features an insulation layer, an aerogel insulating layer for moisture and heat insulation, and a flame-retardant component sequentially arranged on the outside of the cable core. The reflective foil layer of the flame-retardant component is reinforced and fitted onto the outside of the aerogel insulating layer through an interlocking part. A protective part for flame retardancy is fitted onto the outside of the reflective foil layer. Compared to a single layer of PVC, this design combines aerogel insulating layer and flame-retardant component, both of which have heat insulation and flame-retardant functions, thus avoiding the situation where the cable is easily ignited by heat after the single PVC layer is damaged. Attached Figure Description

[0021] Figure 1 This is a front sectional view of the entire utility model.

[0022] Figure 2 This is a side sectional view of the entire utility model.

[0023] Figure 3 This utility model Figure 1 Enlarged view of the structure at point A in the middle.

[0024] Figure 4 This is a partial structural schematic diagram of the flame-retardant layer of this utility model.

[0025] In the diagram: 1. Insulation layer; 2. Aerogel moisture-proof layer; 3. Aerogel heat insulation layer; 301. Misaligned protrusion; 4. Reflective foil layer; 401. Misaligned groove; 5. Flame retardant layer; 501. Annular protrusion; 6. Cable core; 7. Cable outer shell. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model provides, for example Figure 1-4 As shown:

[0028] Example 1: An aerogel insulating heat pipe structure for fireproofing cables, applied to the opposite side of the cable core 6 and the cable outer shell 7, comprising: an insulation layer 1, an aerogel insulating layer, and a flame-retardant component;

[0029] Specifically, insulation layer 1 is sleeved on the outside of cable core 6, aerogel isolation layer is set on the outside of insulation layer 1, aerogel isolation layer is used for moisture protection and heat insulation of insulation layer 1, and flame retardant component is used to isolate external heat source;

[0030] It should be noted that the insulating layer 1 is made of mica tape, and the flame retardant component includes a reflective foil layer 4. The reflective foil layer 4 is sleeved on the outside of the aerogel isolation layer. The reflective foil layer 4 and the aerogel isolation layer are provided with interlocking parts on the opposite side to increase the connection strength between the two. The reflective foil layer 4 is provided with a protective part on the outside of the reflective foil layer 4 to protect the reflective foil layer 4.

[0031] Specifically, the reflective foil layer 4 is aluminum foil or tin foil, and the aerogel isolation layer includes: an aerogel moisture-proof layer 2 and an aerogel heat insulation layer 3;

[0032] It should be noted that the aerogel moisture-proof layer 2 is fitted on the outside of the insulation layer 1. The aerogel moisture-proof layer 2 is used to block the transmission of moisture. The aerogel heat insulation layer 3 is fitted on the outside of the aerogel moisture-proof layer 2. The aerogel heat insulation layer 3 is used to block the conduction of external heat.

[0033] Specifically, the aerogel moisture-proof layer 2 is an aerogel waterproof and heat-insulating roll material, and the aerogel heat insulation layer 3 can be selected from aerogel glass fiber paper, aerogel ceramic fiber paper, aerogel basalt fiber paper, aerogel glass fiber mat, aerogel ceramic fiber mat, aerogel pre-oxidized fiber mat and aerogel basalt fiber mat.

[0034] It should be noted that the thermal insulation performance of aerogel and its composite materials comes from their unique nanoporous structure. They achieve thermal insulation through the infinite long path effect (suppression of thermal conduction), the zero convection effect (blocking of thermal convection), and the infinite heat shield effect (weakening of thermal radiation). The insulating layer 1, the aerogel moisture-proof layer 2, and the aerogel thermal insulation layer 3 are all bonded and fixed with organic high-temperature adhesive. The aerogel thermal insulation layer 3 and the reflective foil layer 4 are bonded and fixed with high-temperature resistant adhesive.

[0035] Specifically, the occlusal portion includes: a misaligned protrusion 301 and a misaligned groove 401;

[0036] It should be noted that multiple misaligned protrusions 301 are formed on the outer side of the aerogel insulation layer 3, and multiple misaligned grooves 401 are formed on the inner wall of the reflective foil layer 4. The misaligned protrusions 301 and the misaligned grooves 401 are misaligned. The misaligned grooves 401 are used to enhance the connection strength between the aerogel insulation layer 3 and the reflective foil layer 4.

[0037] Specifically, the engagement of the misaligned protrusions 301 and the misaligned grooves 401 increases the adhesive bonding area between the reflective foil layer 4 and the aerogel insulation layer 3, thereby increasing the connection strength. The cross-sections of the multiple surrounding misaligned protrusions 301 are serrated rings, and the multiple surrounding misaligned grooves 401 are serrated rings. The misaligned grooves 401 and the misaligned protrusions 301 are misaligned and engaged.

[0038] Example 2: A protective element applied to the fire-resistant aerogel insulation cable structure in Example 1;

[0039] Specifically, the protective part includes a flame-retardant layer 5, which is sleeved on the outside of the reflective foil layer 4 and sleeved on the inner cavity of the cable shell 7.

[0040] It should be noted that the flame retardant layer 5 can be made of halogen-free flame retardant material of silane cross-linked polyolefin elastomer, ceramicized silicone rubber or ceramic fiber paper. Multiple annular protrusions 501 are provided on the outer side of the flame retardant layer 5, and the sides of the annular protrusions 501 are interlocked with the inner wall of the cable shell 7.

[0041] Specifically, the flame-retardant layer 5 and the reflective foil layer 4 are bonded together with high-temperature resistant adhesive, and an annular groove is provided on the outer side of the cable shell 7 for the insertion of the annular protrusion 501.

[0042] In practical use, by sequentially setting an insulation layer 1, an aerogel isolation layer for moisture and heat insulation, and a flame-retardant component on the outside of the cable core 6, the reflective foil layer 4 of the flame-retardant component is reinforced and sleeved on the outside of the aerogel isolation layer through an interlocking part, and a protective part with flame-retardant function is sleeved on the outside of the reflective foil layer 4. Compared with the flame retardancy of a single layer of polyvinyl chloride, the composite aerogel isolation layer and flame-retardant component in this design have both heat insulation and flame-retardant functions, avoiding the situation where the cable directly burns and catches fire when the single polyvinyl chloride layer is damaged.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An aerogel insulating heat pipe structure for fireproofing cables, applied to the opposite side of the cable core (6) and the cable outer shell (7), characterized in that, include: Insulation layer (1), the insulation layer (1) is sleeved on the outside of the cable core (6); An aerogel isolation layer is disposed on the outside of the insulation layer (1) and is used for moisture-proof and heat-insulating the insulation layer (1). A flame-retardant component is used to isolate an external heat source. The flame-retardant component includes a reflective foil layer (4), which is sleeved on the outside of the aerogel isolation layer. The reflective foil layer (4) and the aerogel isolation layer are provided with interlocking parts on the opposite side to increase the connection strength between the two. The outside of the reflective foil layer (4) is provided with a protective part for protecting the reflective foil layer (4).

2. The aerogel insulating heat pipe structure for fireproof cables according to claim 1, characterized in that, The aerogel insulating layer includes: Aerogel moisture barrier (2), the aerogel moisture barrier (2) is sleeved on the outside of the insulating layer (1), the aerogel moisture barrier (2) is used to block the transmission of moisture; Aerogel insulation layer (3) is fitted on the outside of aerogel moisture-proof layer (2) and is used to block the conduction of external heat.

3. The aerogel insulating heat pipe structure for fireproof cables according to claim 2, characterized in that, The occlusal portion includes: Displacement protrusions (301), a plurality of said displacement protrusions (301) are formed on the outer side of the aerogel insulation layer (3); The misaligned groove (401) is formed on the inner wall of the reflective foil layer (4). The misaligned protrusion (301) is misaligned with the misaligned groove (401). The misaligned groove (401) is used to enhance the connection strength between the aerogel insulation layer (3) and the reflective foil layer (4).

4. The aerogel insulating heat pipe structure for fireproof cables according to claim 2, characterized in that, The protective part includes a flame-retardant layer (5), which is sleeved on the outside of the reflective foil layer (4) and sleeved on the inner cavity of the cable shell (7).

5. The aerogel insulating heat pipe structure for fireproof cables according to claim 4, characterized in that, The flame-retardant layer (5) has multiple annular protrusions (501) on its outer side, and the sides of the annular protrusions (501) are interlocked with the inner wall of the cable shell (7).

6. The aerogel insulating heat pipe structure for fireproof cables according to claim 5, characterized in that, The outer side of the cable shell (7) is provided with an annular groove, which is used for the insertion of the annular protrusion (501).

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