Fireproof high-temperature-resistant cable

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a fireproof high-temperature-resistant cable. According to the utility model, the high-temperature-resistant and fireproof effects of the cable can be effectively realized by arranging the multi-layer structure, and the heat-insulating and fireproof effects can be greatly improved by arranging the barrier layer between the heat-insulating layer and the second fireproof layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, and in particular relates to a fireproof and high temperature resistant 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] However, the cables currently in use are difficult to resist flames when a fire occurs and the lines are easily burned. At the same time, it is difficult to isolate the high temperature generated. The heat accumulation can easily cause the cable itself to catch fire, causing damage to the safety of people and property. Utility Model Content

[0004] The utility model aims to provide a fireproof and high temperature resistant cable, which can effectively insulate external heat and block the fire source to avoid damage to the internal cable, thus solving the problem of poor high temperature resistance and fireproof effect of the current cable.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a fireproof and high-temperature resistant cable, comprising a cable body and an internal core, a first filling layer is arranged between the cable body and the internal core, the cable body comprises a fireproof outer sheath, a first insulating layer, a thermal insulation layer, a barrier layer, and a second fireproof layer, the fireproof outer sheath is coated on the first insulating layer, the first insulating layer is coated on the outside of the thermal insulation layer, the outer wall of the thermal insulation layer is evenly provided with grooves, the barrier layer is coated by a flame-retardant sleeve, the outer surface of the flame-retardant sleeve is evenly provided with flame-retardant protrusions, the surface of the flame-retardant protrusions and the outer surface of the flame-retardant sleeve are coated by the thermal insulation layer, and the barrier layer is coated on the outside of the second fireproof layer.

[0006] Preferably, the fireproof outer sheath is made of polyethylene or LSZH material.

[0007] Preferably, the heat insulation layer is made of silicone rubber material.

[0008] Preferably, the barrier layer comprises an inner layer, an outer layer and a support body which is integrally formed with the inner layer and penetrates the outer layer.

[0009] Preferably, the inner core is provided with an inner insulation layer and an inner heat insulation layer from inside to outside.

[0010] Preferably, the surface of the groove is provided with a heat insulation coating, and the surface of the flame retardant protrusion is provided with a flame retardant coating.

[0011] Beneficial effects:

[0012] The utility model can effectively achieve the high temperature resistance and fireproof effect of the cable by setting a multi-layer structure. The barrier layer is set between the thermal insulation layer and the second fireproof layer to greatly improve the thermal insulation and fireproof effect. At the same time, grooves and thermal insulation protrusions are set on the upper and lower surfaces of the thermal insulation layer connected to the barrier layer. The thermal insulation and flame retardant area of ​​the thermal insulation layer is effectively expanded through the concave and convex surface design. At the same time, the surface coating is used to effectively perform flame retardant and heat insulation, thereby enhancing the flame retardant and heat insulation performance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of a fireproof and high temperature resistant cable of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the internal wire core in the utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of the barrier layer in the utility model;

[0016] Figure 4 This is a schematic diagram of the axial structure of the container in the utility model;

[0017] Figure 5 This is a partial structural diagram of a cable body in a fireproof and high temperature resistant cable of the utility model;

[0018] Figure 6 It is a schematic diagram of the cross-sectional flattening structure of the heat insulation layer in the utility model;

[0019] Among them, the cable body 1, the fireproof outer sheath 2, the first insulating layer 3, the thermal insulation layer 4, the barrier layer 5, the outer layer 51, the inner layer 52, the support body 53, the second fireproof layer 6, the first filling layer 7, the inner core 8, the groove 41, the thermal insulation coating 411, the flame retardant protrusion 42, and the flame retardant coating 421. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0023] The materials used for the first insulating layer 3 and the internal insulating layer 82 in the present invention are insulating materials commonly used in the field of cable technology, such as cross-linked polyethylene, butyl rubber, etc. Rubber materials are preferred because rubber materials have excellent fire resistance, chemical resistance and good flexibility while having excellent effects.

[0024] The material used for the second fireproof layer 6 in the present invention is a fireproof material commonly used in the field of cable technology, such as synthetic mica tape, phenolic resin composite material, etc.

[0025] The material used for the first filling layer 7 in the present invention is magnesium oxide, insulating paper, insulating tape and other flame retardant materials commonly used in the field of cable technology.

[0026] The flame retardant materials used for the flame retardant protrusions 421 in the present invention are all flame retardant or heat insulating materials commonly used in cables in the art.

[0027] like Figure 1 , Figure 5 and Figure 6A fireproof and high temperature resistant cable is shown, comprising a cable body 1 and an internal core 8, wherein a first filling layer 7 is arranged between the cable body 1 and the internal core 8, wherein the cable body 1 comprises a fireproof outer sheath 2, a first insulating layer 3, a heat insulating layer 4, a barrier layer 5, and a second fireproof layer 6, wherein the fireproof outer sheath 2 is coated on the outside of the first insulating layer 3, wherein the first insulating layer 3 is coated on the outside of the heat insulating layer 4, wherein grooves 41 are uniformly arranged on the outer wall of the heat insulating layer 4, wherein the grooves 41 may be hemispherical, semi-elliptical, etc. When the first insulating layer 3 coats the heat insulating layer 4, the first insulating layer 3 completely fills the grooves 41 and completely bonds with the inner surface of the grooves 41. The barrier layer 5 is covered by a flame retardant sleeve 44, and flame retardant protrusions 42 are evenly arranged on the outer surface of the flame retardant sleeve 44. The flame retardant protrusions 42 can be hemispherical, semi-elliptical, etc. The surface of the flame retardant protrusions 42 and the outer surface of the flame retardant sleeve 44 are covered by a heat insulation layer 4. The barrier layer 5 is coated on the outside of the second fireproof layer 6. In this embodiment, a first insulating layer 3 is arranged between the fireproof outer sheath 2 and the heat insulation layer 4 to effectively isolate the external electromagnetic interference to the internal core 8 of the cable. At the same time, a barrier layer 5 is arranged between the heat insulation layer 4 and the second fireproof layer 6. The barrier layer 5 adopts materials commonly used in this field, has high temperature resistance, and can greatly improve the flame retardant effect.

[0028] The material of the flame retardant protrusion 42 is the same as that of the barrier layer 5. The groove 41 and the flame retardant protrusion 42 can greatly increase the barrier area of ​​the heat insulation layer 4, improve the heat insulation effect, and effectively enhance the barrier effect of the barrier layer 5. At the same time, the groove 41 and the flame retardant protrusion 42 can greatly increase the internal surface area, and can also effectively enhance the compression resistance of the cable.

[0029] The fireproof outer sheath 2 is made of polyethylene or LSZH material.

[0030] The heat insulation layer 4 is made of silicone rubber material.

[0031] like Figure 3 and Figure 4 The barrier layer 5 shown includes an inner layer 52, an outer layer 51, and a support body 53 integrally formed with the inner layer 52 and penetrating the outer layer. The material of the outer layer 51 includes quartz sand, and the material can also be a material formed by mixing quartz sand and resin and melting them. The filler 511 in the barrier layer 5 enhances the flame retardant and heat insulation effects. Secondly, after the barrier layer 5 is damaged, the internal barrier material 511 will form a new barrier layer to isolate the fire source.

[0032] like Figure 4 The inner core 8 shown is provided with an inner insulating layer 82 and an inner heat insulating layer 81 from the inside to the outside. The material of the inner heat insulating layer 81 is ceramic polyolefin. At the same time, the utility model provides an outer wrapping on the outer side of the inner core 8 to enhance the protection of the core and avoid damage.

[0033] like Figure 6 The surface of the groove 41 shown is provided with a heat-insulating coating 411, and the surface of the flame-retardant protrusion 42 is provided with a flame-retardant coating 421. The heat-insulating coating 411 on the upper layer improves the heat-insulating effect and expands the heat-insulating area. Secondly, the flame-retardant coating 421 on the bottom effectively solves the problem that the cable will be heated up and suddenly ignited after the heat passes through the local insulation layer 4, thereby enhancing the high-temperature resistance and flame-retardant effect of the cable.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A fireproof and high temperature resistant cable, comprising a cable body (1) and an internal wire core (8), characterized in that: A first filling layer (7) is provided between the cable body (1) and the internal core (8); the cable body (1) comprises a fireproof outer sheath (2), a first insulating layer (3), a heat insulating layer (4), a barrier layer (5), and a second fireproof layer (6); the fireproof outer sheath (2) is coated on the first insulating layer (3); the first insulating layer (3) is coated on the outside of the heat insulating layer (4); grooves (41) are uniformly provided on the outer wall of the heat insulating layer (4); the barrier layer (5) is coated on the flame retardant sleeve (44); the outer surface of the flame retardant sleeve (44) is uniformly provided with flame retardant protrusions (42); the surface of the flame retardant protrusion (42) and the outer surface of the flame retardant sleeve (44) are coated on the heat insulating layer (4); and the barrier layer (5) is coated on the outside of the second fireproof layer (6).

2. The fireproof and high temperature resistant cable according to claim 1, characterized in that: The fireproof outer sheath (2) is made of polyethylene or LSZH material.

3. The fireproof and high temperature resistant cable according to claim 1, characterized in that: The heat insulation layer (4) is made of silicone rubber material.

4. The fireproof and high temperature resistant cable according to claim 3, characterized in that: The barrier layer (5) comprises an inner layer (52), an outer layer (51), and a support body (53) integrally formed with the inner layer (52) and penetrating the outer layer.

5. The fireproof and high temperature resistant cable according to claim 4, characterized in that: The inner wire core (8) is provided with an inner insulating layer (82) and an inner heat insulating layer (81) from the inside to the outside.

6. The fireproof and high temperature resistant cable according to claim 1, characterized in that: The surface of the groove (41) is provided with a heat insulation coating (411), and the surface of the flame retardant protrusion (42) is provided with a flame retardant coating (421).

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