CN202758633U - Low-voltage flexible fireproof cable - Google Patents

Abstract

The utility model discloses a low-voltage flexible fire-resistant cable, which is characterized in that it comprises an inner core, a fire-retardant glass rope filling layer, a ceramic silicon rubber wrapping tape, a self-locking armored metal sheath, and the fire-retardant glass rope filling layer Wrapped outside the inner core, the vitrified silicone rubber tape and the self-locking armored metal sheath are wrapped sequentially on the outside of the fire-retardant glass rope filling layer from inside to outside. The inner core includes a conductor, a fire-resistant and heat-insulating layer, and the A refractory insulation wraps around the conductor. The utility model adopts this structure, which reduces the temperature of the fire-resistant and heat-insulating layer during normal operation of the cable, improves the fire-resistant temperature level, and enables the cable to operate normally within a period of time, thus gaining valuable time for fire fighting. Reduce the possibility of cable insulation aging due to local overheating, and the bending performance is good. The outer sheath adopts self-locking armored metal sheath, which effectively improves the flexibility of the cable, and the self-locking armor also has excellent corrosion resistance, compression resistance, wear resistance and other properties.

Description

A low-voltage flexible fire-resistant cable

technical field

The utility model relates to a low-voltage flexible fire-resistant cable.

Background technique

Due to the continuous development of high-rise buildings, underground railways, underground streets, large power stations and important industrial and mining enterprises, low-voltage fire-resistant cables are more and more widely used. Due to the design of traditional low-voltage cables with steel tape wrapped armor and sheath layer, the cable cannot reflect the softness, which brings a lot of inconvenience in installation and construction, and the conductor is directly covered with refractory materials. If heated for a long time, the refractory material will fall off, which will not only pollute the environment but also damage the health of production workers.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and provide a low-voltage flexible fire-resistant cable with reasonable structural design, good flexibility and strong fire resistance.

The technical scheme adopted by the utility model to solve the above-mentioned problems is: the low-voltage flexible fire-resistant cable is characterized in that it includes an inner core, a flame-retardant glass rope filling layer, a ceramic silicon rubber wrapping tape, and a self-locking armored metal sheath. The flame-retardant glass rope filling layer is wrapped outside the inner core, and the ceramic silicone rubber tape and self-locking armored metal sheath are wrapped on the outside of the flame-retardant glass rope filling layer from the inside to the outside. The inner core includes conductors, The fire-resistant and heat-insulating layer wraps the outside of the conductor. With this structure, the temperature of the refractory heat insulation layer is reduced during normal operation of the cable. When the refractory heat insulation layer encounters fire or high temperature, ceramic silicone rubber is used to wrap the tape, which will evaporate the material when it encounters a high temperature of 500~600°C. Its own moisture and organic compounds form ceramic-like compounds to protect the inner layer structure, thereby improving the fire resistance temperature level, enabling the cable to operate normally for a period of time, and gaining valuable time for fire fighting. The flame-retardant glass rope filling layer has good heat conduction effect, which can conduct the concentrated heat due to local overheating along the axial direction, disperse the heat concentration, and reduce the possibility of cable insulation aging due to local overheating. At the same time, the material of the vitrified silicone rubber tape contains rubber-based compounds to ensure the bending performance of the cable during normal use. The outer sheath adopts self-locking armored metal sheath, which effectively improves the flexibility of the cable, and the self-locking armor also has excellent corrosion resistance, compression resistance, wear resistance and other properties.

The fire-resistant and heat-insulating layer of the utility model is composed of a fire-resistant mica tape and an insulating layer, and the fire-resistant mica tape and the insulating layer are sequentially wrapped on the outside of the conductor from inside to outside.

Four inner cores are arranged in the fire-retardant glass rope filling layer of the utility model.

The self-locking armored metal sheath of the utility model adopts stainless steel.

Compared with the prior art, the utility model has the following advantages and effects: by adopting this structure, the temperature of the fire-resistant and heat-insulating layer when the cable is in normal operation is reduced, the fire-resistant temperature level is improved, and the cable can be operated normally within a period of time, which is a great contribution to fire fighting. Gain valuable time. Reduce the possibility of cable insulation aging due to local overheating, and the bending performance is good. The outer sheath adopts self-locking armored metal sheath, which effectively improves the flexibility of the cable, and the self-locking armor also has excellent corrosion resistance, compression resistance, wear resistance and other properties.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the utility model.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.

Referring to Figure 1, the low-voltage flexible fire-resistant cable of this embodiment includes an inner core, a flame-retardant glass rope filling layer 4, a ceramicized silicone rubber wrapping tape 5, and a self-locking armored metal sheath 6, and the flame-retardant glass rope filling layer 4 Wrapped outside the inner core, the vitrified silicone rubber tape 5 and the self-locking armored metal sheath 6 are wrapped sequentially on the outside of the flame-retardant glass rope filling layer 4 from the inside to the outside. The inner core includes a conductor 1, a fire-resistant and heat-insulating layer, and the fire-resistant and heat-insulating layer wraps the outside of the conductor 1.

The fire-resistant and heat-insulating layer is composed of a fire-resistant mica tape 2 and an insulating layer 3, and the fire-resistant mica tape 2 and the insulating layer 3 are wrapped on the outside of the conductor 1 sequentially from the inside to the outside.

In this embodiment, four inner cores are arranged in the filling layer 4 of flame-retardant glass cords. The fire-resistant and heat-insulating layer adopts a layered covering gap wrapping method, so that the fire-resistant and heat-insulating layer and the conductor 1 are more closely combined.

In addition, it should be noted that the specific embodiments described in this specification may be different in parts, shapes and names of parts, and the above content described in this specification is only an illustration of the structure of the present invention. All equivalent changes or simple changes based on the structure, features and principles described in the utility model patent concept are included in the protection scope of the utility model patent. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the definition defined in the claims scope, all should belong to the protection scope of the present utility model.

Claims (4)

1. low pressure flexible fireproof cable, it is characterized in that: comprise inner core, fireproof glass silk rope packed layer, ceramic silicon rubber band, self-locking armouring metallic sheath, described fireproof glass silk rope packed layer is wrapped in the outside of inner core, ceramic silicon rubber band, self-locking armouring metallic sheath are wrapped in the outside of fireproof glass silk rope packed layer from inside to outside successively, described inner core comprises conductor, refractory insulating layer, and described refractory insulating layer is wrapped in the conductor outside.

2. low pressure flexible fireproof cable according to claim 1, it is characterized in that: described refractory insulating layer is comprised of fire-resistant isinglass belt and insulating barrier, and fire-resistant isinglass belt and insulating barrier are wrapped in the outside of conductor from inside to outside successively.

3. low pressure flexible fireproof cable according to claim 1 is characterized in that: be provided with altogether four inner cores in the described fireproof glass silk rope packed layer.

4. low pressure flexible fireproof cable according to claim 1 is characterized in that: described self-locking armouring metallic sheath employing stainless steel.

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