High-flame-retardant high-temperature-resistant cable

Abstract

The utility model relates to a high-flame-retardant high-temperature-resistant cable, which comprises a flame-retardant sheath, a high-flame-retardant flame-retardant layer is fixed on the inner surface of the flame-retardant sheath, an inner core is fixed on the inner surface of the flame-retardant layer, a plurality of reinforcing ribs are fixed on the outer surface of the flame-retardant sheath, and the reinforcing ribs are fixed on the outer surface of the flame-retardant sheath. A plurality of reinforcing grooves are formed in the outer surface of the flame-retardant outer skin, and a plurality of fire-retardant partitions are fixed to the outer surface of the flame-retardant outer skin. According to the high-flame-retardant high-temperature-resistant cable, heat accumulation can be reduced through the inner core, heat dissipation can be accelerated through the airflow through grooves, the pulling resistance of the cable is improved through the steel wire sleeve, the structural strength of the cable is further enhanced through the reinforcing ribs and the reinforcing grooves, and when a fire occurs, flame is prevented from spreading inwards through the flame-retardant layer; the flame can be blocked through the fire-retardant partition, and the contact area with the flame is increased through the airflow through grooves, so that more inert gases are released to extinguish the fire, the high-flame-retardant effect can be achieved, and the use is safe.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a highly flame-retardant and high-temperature resistant cable. Background Art

[0002] High temperature resistant cables are different from general cables. High temperature resistant cables refer to cables that can work normally at temperatures of one hundred and eighty degrees Celsius and above. Therefore, high temperature resistant cables are widely used in harsh environments such as high temperature, high pressure, and magnetic fields, and are well received by industrial users. Their long-term continuous working temperature can be one hundred and twenty-five to two hundred and fifty degrees Celsius.

[0003] High temperature resistant cables can achieve high temperature resistance and prevent the outer protective layer of the cable from failing at a certain temperature. However, in the event of a circuit failure, there is still the problem of spontaneous combustion of the cable. It still does not have high flame retardancy. Under high temperature for a long time, if there is no non-combustible material for flame retardant isolation, the outer sheath of the cable will still burn, and it is difficult to protect it until maintenance personnel go for maintenance. Therefore, a highly flame retardant and high temperature resistant cable is proposed to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a highly flame-retardant and high-temperature resistant cable, which has the advantages of high flame retardancy and the like, and solves the problem that circuit faults can still easily cause spontaneous combustion of the cable.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a highly flame-retardant and high-temperature resistant cable, comprising a flame-retardant outer skin, a highly flame-retardant flame-retardant layer is fixed on the inner surface of the flame-retardant outer skin, an inner core is fixed on the inner surface of the flame-retardant layer, a plurality of reinforcing ribs are fixed on the outer surface of the flame-retardant outer skin, a plurality of reinforcing grooves are opened on the outer surface of the flame-retardant outer skin, a plurality of fire-blocking partitions are fixed on the outer surface of the flame-retardant outer skin, and the fire-blocking partitions are used to divide the cable into multiple areas to prevent the spread of fire;

[0006] The inner core comprises an inner layer fixed on the inner surface of the flame retardant layer, a separation strip for separating conductors is fixed inside the inner layer, and a plurality of conducting wires are fixed inside the inner layer.

[0007] Furthermore, the flame retardant outer skin is polytetrafluoroethylene added with a flame retardant, and a glass fiber mesh is fixed on the outer surface of the flame retardant layer.

[0008] Furthermore, a steel wire sleeve is fixed inside the flame retardant layer, and the steel wire sleeve is a plurality of aluminum-plated steel wires.

[0009] Furthermore, the inner layer is polychlorotrifluoroethylene, and the inner layer is divided into a plurality of isolation areas by a separator bar, and a plurality of the conductive wires are respectively fixed in the plurality of isolation areas.

[0010] Furthermore, the partition strip is radial, and a plurality of temperature-insulating holes are provided inside the partition strip.

[0011] Furthermore, the conductor is a soft copper wire, and an insulating layer fixed to the inner layer is fixed on the outer surface of the conductor.

[0012] Furthermore, the fire barrier partition is made of hard fluoroplastics, and a plurality of air flow grooves are provided on the outer surface of the fire barrier partition.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The highly flame-retardant and high-temperature resistant cable can reduce heat accumulation through the inner core, accelerate heat dissipation through the airflow grooves, increase its tensile strength through the wire sleeve, and further enhance its structural strength through reinforcing ribs and reinforcing grooves. In case of fire, the flame can be prevented from spreading inward by the flame-retardant layer, the flame can be blocked by the fire-blocking partition, and the contact area with the flame can be increased through the airflow grooves to release more inert gas for fire extinguishing, thereby achieving a highly flame-retardant effect and being safe to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the planar structure of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the inner core of the utility model.

[0018] In the figure: 1 flame retardant outer skin, 2 flame retardant layer, 3 steel wire sleeve, 4 inner core, 401 inner layer, 402 dividing strip, 403 thermal insulation hole, 404 insulating layer, 405 conductor, 5 reinforcing rib, 6 reinforcing groove, 7 fire barrier, 8 air flow groove. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-2In this embodiment, a highly flame-retardant and high-temperature resistant cable includes a flame-retardant outer sheath 1. It should be noted that the flame-retardant outer sheath 1 is polytetrafluoroethylene with added flame retardant. Polytetrafluoroethylene is copolymerized with tetrafluoroethylene and hexafluoropropylene. It is a soft plastic with lower tensile strength, wear resistance and creep resistance than many engineering plastics. It is chemically inert and has a low dielectric constant over a wide temperature and frequency range. The material does not ignite and can prevent the spread of flames. When polytetrafluoroethylene with added flame retardant encounters a fire, the flame retardant will volatilize and produce a large amount of inert gas, which will quickly extinguish the flame.

[0021] In addition, a highly flame-retardant flame-retardant layer 2 is fixed to the inner surface of the flame-retardant outer skin 1, and a glass fiber mesh is fixed to the outer surface of the flame-retardant layer 2. Glass fiber composite materials have the characteristics of light weight, high strength, good insulation, fatigue resistance, corrosion resistance, easy processing and molding, and easy maintenance. They have been widely used in the power industry. Composite materials supported by them and other materials can have a variety of properties, and the glass fiber mesh can increase the structural resistance of the cable, so that it can withstand greater impact and pulling, prevent it from breaking and catching fire, and increase the insulation of the cable. It should be noted that a steel wire sleeve 3 is fixed inside the flame-retardant layer 2. The steel wire sleeve 3 is a plurality of aluminum-plated steel wires. Steel wires are added to the flame-retardant layer 2 of the cable to increase the tensile strength of the cable.

[0022] Furthermore, an inner core 4 is fixed to the inner surface of the flame retardant layer 2, and a plurality of reinforcing ribs 5 are fixed to the outer surface of the flame retardant outer skin 1. The reinforcing ribs 5 can increase the structural strength. The material of the reinforcing ribs 5 is the same as that of the flame retardant outer skin 1. A plurality of reinforcing grooves 6 are provided on the outer surface of the flame retardant outer skin 1. In addition to strengthening the structural strength through the structural stress, the reinforcing grooves 6 can also absorb some moisture on rainy days to play a slow cooling role.

[0023] In addition, a plurality of fire-blocking partitions 7 are fixed to the outer surface of the flame-retardant outer sheath 1. The fire-blocking partitions 7 are used to divide the cable into multiple areas to prevent the spread of fire. It should be noted that the fire-blocking partitions 7 are hard fluoroplastics. Since fluoroplastics contain fluorine atoms in their molecular structure, they have many excellent properties, such as excellent electrical insulation properties, high heat resistance, outstanding oil resistance, solvent resistance and wear resistance, and good moisture resistance and low temperature resistance, and can serve as flame partition materials.

[0024] In addition, a plurality of air flow grooves 8 are provided on the outer surface of the fire barrier partition 7, and the air flow grooves 8 allow air to pass through, and the flowing air takes away the heat, thereby helping the cable to dissipate heat, preventing the temperature from being too high and reducing the service life of the cable. When a fire occurs, the flame retardant properties of the fire barrier partition 7 can also be used to release inert gas for flame retardancy through its larger outer surface area.

[0025] During operation, the inner core 4 reduces heat accumulation, the air flow grooves 8 accelerate the dissipation of heat, the reinforcing ribs 5 and the reinforcing grooves 6 enhance its structural strength, the steel wire sleeve 3 increases its tensile strength, the flame retardant layer 2 prevents the flame from spreading inward, the fire barrier 7 blocks the flame, the air flow grooves 8 increase the contact area with the flame, and release inert gas to extinguish the fire.

[0026] See also Figure 3 In order to protect the cable so that it can continue to operate at high temperatures, the inner core 4 in this embodiment includes an inner layer 401 fixed to the inner surface of the flame retardant layer 2. It should be noted that the inner layer 401 is polychlorotrifluoroethylene. Polychlorotrifluoroethylene is inert to most active chemicals at room temperature and has excellent gas barrier capabilities. The water vapor permeability of its film product is the lowest among all transparent plastic films. Therefore, it can be used as the inner layer 401 to isolate water vapor and prevent electrical short circuits from causing fires.

[0027] Furthermore, a separator bar 402 for separating conductors is fixed inside the inner layer 401, and the inner layer 401 is divided into a plurality of isolation zones by the separator bar 402. The outer surface of the separator bar 402 has a plurality of protruding ends, and the opposite sides of the protruding ends are fixed to the inner surface of the flame retardant layer 2. A plurality of conductors 405 are respectively fixed in a plurality of isolation zones, and the isolation zones can separate the plurality of conductors 405 to prevent them from contacting or short-circuiting due to discharge.

[0028] It should be noted that the dividing strips 402 are radial, and the radial dividing strips 402 can divide the inner layer 401 into multiple areas and fix each wire 405 in a fixed area. A plurality of insulation holes 403 are opened inside the dividing strips 402. The thermal conductivity of still air is not as good as direct contact, so the heat accumulation in the center is reduced by increasing the empty layer area.

[0029] In addition, a plurality of conductors 405 are fixed inside the inner layer 401. It should be noted that the conductors 405 are soft copper wires. Copper wires have good electrical conductivity and low resistance. When current passes through them, the heat generated is much smaller than that of aluminum wires, which can reduce the heating of the cable. An insulating layer 404 fixed to the inner layer 401 is fixed on the outer surface of the conductor 405. The insulating layer 404 can protect the conductor 405, thereby isolating its outer surface from other substances and preventing short circuits caused by discharge.

[0030] In general, the partition strips 402 can separate the inner layer 401 into multiple areas, the insulation holes 403 increase the empty layer area to reduce the accumulation of heat in the center, the wire 405 with low resistance reduces the heat generated by electricity, and the insulating layer 404 is used to isolate the outer surface of the wire 405.

[0031] The working principle of the above embodiment is:

[0032] During use, in daily use, the inner layer 401 can be divided into multiple areas by the dividing strips 402, the heat accumulation in the center can be reduced by increasing the empty layer area through the insulation holes 403, the heat generation caused by power-on can be reduced by the wire 405 with good conductivity, and the outer surface of the wire 405 can be isolated from other substances by the insulating layer 404 to prevent short circuit caused by discharge, and the heat dissipation can be accelerated by the air flow groove 8, the tensile strength can be increased by the steel wire sleeve 3, and the structural strength can be further enhanced by the reinforcing ribs 5 and the reinforcing groove 6. When encountering a fire, the flame can be prevented from spreading inward by the flame retardant layer 2, the flame can be blocked by the fire barrier 7, and the contact area with the flame can be increased by the air flow groove 8 to release more inert gas for fire extinguishing, so as to achieve a high flame retardant effect and be safe to use.

[0033] 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A highly flame-retardant and high-temperature resistant cable, comprising a flame-retardant outer sheath (1), characterized in that: The inner surface of the flame-retardant outer skin (1) is fixed with a highly flame-retardant flame-retardant layer (2), the inner surface of the flame-retardant layer (2) is fixed with an inner core (4), the outer surface of the flame-retardant outer skin (1) is fixed with a plurality of reinforcing ribs (5), the outer surface of the flame-retardant outer skin (1) is provided with a plurality of reinforcing grooves (6), the outer surface of the flame-retardant outer skin (1) is fixed with a plurality of fire-blocking partitions (7), and the fire-blocking partitions (7) are used to divide the cable into a plurality of areas to prevent the spread of fire; The inner core (4) comprises an inner layer (401) fixed on the inner surface of the flame retardant layer (2), a separation strip (402) for separating conductors is fixed inside the inner layer (401), and a plurality of conducting wires (405) are fixed inside the inner layer (401).

2. A highly flame-retardant and high-temperature resistant cable according to claim 1, characterized in that: The flame retardant outer skin (1) is polytetrafluoroethylene to which a flame retardant is added, and a glass fiber mesh is fixed on the outer surface of the flame retardant layer (2).

3. A highly flame-retardant and high-temperature resistant cable according to claim 1, characterized in that: A steel wire sleeve (3) is fixed inside the flame retardant layer (2), and the steel wire sleeve (3) is a plurality of aluminum-plated steel wires.

4. A highly flame-retardant and high-temperature resistant cable according to claim 1, characterized in that: The inner layer (401) is made of polychlorotrifluoroethylene, and the inner layer (401) is divided into a plurality of isolation areas by a separation strip (402), and a plurality of the conductive wires (405) are respectively fixed in the plurality of isolation areas.

5. The highly flame-retardant and high-temperature resistant cable according to claim 1, characterized in that: The partition bar (402) is radially shaped, and a plurality of temperature-insulating holes (403) are provided inside the partition bar (402).

6. A highly flame-retardant and high-temperature resistant cable according to claim 1, characterized in that: The conductor (405) is a soft copper wire, and an insulating layer (404) fixed to the inner layer (401) is fixed on the outer surface of the conductor (405).

7. The highly flame-retardant and high-temperature resistant cable according to claim 1, characterized in that: The fire barrier (7) is made of hard fluoroplastics, and a plurality of air flow grooves (8) are provided on the outer surface of the fire barrier (7).

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