CN217485132U - High fire resistance cable with early warning function - Google Patents

Abstract

The utility model discloses a high fire-resistant cable with early warning function, which is characterized in that the cable core is isolated from the air by arranging an oxygen isolation layer for coating the cable core, and the cable core is prevented from burning due to high temperature when the cable meets fire; the fire-resistant performance of the cable is further improved by arranging the fire-resistant layer for coating the oxygen-resistant layer and arranging the fire-resistant layer in the cable core; the outer protection layer coated with the fire insulation layer is arranged on the outermost layer, and the outer protection layer and the inner structure form a compact cable structure together, so that the extrusion resistance and the impact resistance of the cable are improved; through set up alarm device on being in outermost outer jacket for the cable can in time send the warning when meeting fire, reduces casualties and loss of property, but wide application in cable technical field.

Description

High fire resistance cable with early warning function

Technical Field

The utility model belongs to the technical field of the cable technique and specifically relates to a high fire resistance cable with early warning function.

Background

With the rapid development of economy, industries such as petrifaction, subways, nuclear power stations, shipbuilding, optoelectronic communication and the like are rapidly developed, and the use amount of wires and cables is rapidly increased.

In case of fire, the electric wire and the cable are easily burned to cause secondary fire. Therefore, at present, fire-resistant cables are mostly adopted in places where fires easily occur, secondary diffusion of the fires is avoided, normal operation of lines can be kept when the fires occur, rescue work is convenient to expand, and casualties and property loss are reduced. However, due to the fact that the environmental conditions during fire are severe, the cable is generally impacted by sundries, sprayed with water during rescue, and even collapsed by masonry, and the severity of the fire cannot be estimated, the traditional cable generally cannot meet the fire resistance requirement in the fire environment, cannot maintain the integrity of a circuit for a certain time in the fire environment, and causes secondary diffusion of the fire, and meanwhile, fire alarm information cannot be sent out timely.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims to provide a: the utility model provides a high fire resistance cable with early warning function to promote the fire resistance of cable, and in time early warning to the conflagration.

The utility model adopts the technical proposal that:

a high fire resistance cable with early warning function, comprising:

an oxygen barrier layer;

the cable cores are coated by the oxygen isolation layer, and a fire-resistant layer is arranged in each cable core;

the fire insulation layer is coated on one side of the oxygen insulation layer, which is far away from the cable core;

the outer jacket is coated on one side, away from the oxygen separation layer, of the fire separation layer, and an alarm device is arranged on the outer jacket.

Further, the oxygen isolation layer and the outer protection layer are made of low-smoke halogen-free polyolefin materials.

Further, the flame retardant coating is a wrapping structure formed by mica tapes.

Further, the cable core still includes conductive layer and insulating layer, the conductive layer quilt the flame retardant coating is around the package cladding, the insulating layer cladding sets up the flame retardant coating is kept away from one side of conductive layer.

Furthermore, the conductor layer is an annealed copper conductor, and the insulating layer is made of a cross-linked polyethylene material.

Further, high fire resistance cable still includes the filling layer, the filling layer is filled and is set up between the cable core.

Further, the filling layer adopts inorganic paper filling ropes.

Further, the inorganic paper filled rope includes an inorganic paper rope coated with a hydroxide compound and a glass fiber rope.

Furthermore, the fire barrier layer adopts a double-sided copper-plastic composite belt.

Further, the alarm device is a thermistor wire.

The beneficial effects of the utility model are that:

the utility model relates to a high fire resistance cable with early warning function, through setting up the oxygen barrier layer of cladding cable core, make cable core and air isolated, prevent the cable core when the cable meets fire because of the high temperature takes place the burning; the fire-resistant performance of the cable is further improved by arranging the fire-resistant layer for coating the oxygen-resistant layer and arranging the fire-resistant layer in the cable core; the outer protection layer coated with the fire insulation layer is arranged on the outermost layer, and the outer protection layer and the inner structure form a compact cable structure together, so that the extrusion resistance and the impact resistance of the cable are improved; through set up alarm device on being in outmost outer jacket for the cable can in time send the warning when meeting fire, reduces casualties and loss of property.

Drawings

Fig. 1 is the utility model relates to a structure schematic diagram of high fire resistance cable with early warning function.

Reference numerals are as follows: 101. an oxygen barrier layer; 102. a refractory layer; 103. a fire barrier layer; 104. an outer jacket; 105. an alarm device; 106. a conductor layer; 107. an insulating layer; 108. and (5) filling the layer.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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 thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood not to include the number. If there is a description to first, second, third etc. for the purpose of distinguishing between technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of technical features indicated or to implicitly indicate the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, a high fire-resistant cable having an early warning function includes:

an oxygen barrier layer 101;

the cable comprises a plurality of cable cores, wherein the cable cores are coated by an oxygen barrier layer 101, and a fire-resistant layer 102 is arranged in each cable core;

the fire insulation layer 103 is arranged on one side, away from the cable core, of the oxygen insulation layer 101 in a wrapping mode;

the outer protective layer 104 is arranged on one side, far away from the oxygen insulation layer 101, of the fire insulation layer 103 in a wrapping mode, and an alarm device 105 is arranged on the outer protective layer 104.

The utility model relates to a high fire resistance cable with early warning function, through setting up the oxygen layer 101 that separates of cladding cable core, make cable core and air isolated, prevent cable core because of high temperature takes place to burn when the cable meets fire; the fire-resistant performance of the cable is further improved by arranging the fire-resistant layer 103 wrapping the oxygen-resistant layer 101 and arranging the fire-resistant layer 102 in the cable core; the outer protective layer 104 coated with the fire insulation layer 103 is arranged on the outermost layer, and forms a compact cable structure together with the internal structure, so that the extrusion resistance and the impact resistance of the cable are improved; by arranging the alarm device 105 on the outermost outer protective layer 104, the cable can give an alarm in time when encountering fire, and casualties and property loss are reduced.

As an alternative embodiment, the oxygen barrier 101 and the outer sheath 104 are made of low smoke zero halogen polyolefin material.

The oxygen barrier layer 101 and the outer protective layer 104 which are made of low-smoke halogen-free polyolefin materials have high flame retardant performance and strong crusting capability at high temperature, and are used for reducing the impact of flame received inside the cable; meanwhile, the oxygen insulation layer 101 isolates air, so that the cable core is prevented from burning due to high temperature; in addition, the oxygen barrier layer 101 and the outer protective layer 104 have good environmental protection performance, and the smoke yield is low when the fire burns, so that people can escape conveniently.

The oxygen-isolating layer 101 and the outer protective layer 104 are formed by extruding low-smoke halogen-free polyolefin materials in an extrusion type production mode. Through extrusion formula generation for separate oxygen layer 101 and outer jacket 104 with other structures of high fire resistance cable are inseparabler to be laminated, have improved the shock resistance and the anti extrusion performance of cable. Optionally, the thickness of the oxygen barrier layer 101 is 1.5-3.0mm, and the oxygen index of the adopted low-smoke halogen-free polyolefin material is more than or equal to 45%; the outer jacket 104 has a thickness of 1.8-3.5 mm.

As an alternative embodiment, the fire-resistant layer 102 is a wrapped structure formed by mica tapes.

Wherein, the mica tape can release crystal water at the temperature of over 800 ℃, thereby reducing the temperature of the conductor and having excellent fire resistance; and the mica tape has good electrical insulation performance, so that the high-fire-resistance cable still has good electrical insulation among the wire cores under high-temperature combustion.

Optionally, the thickness of the mica tape adopted by the fire-resistant layer 102 is 0.14mm, and the overlapping rate is 10% -15%.

As an optional embodiment, the cable core further includes a conductor layer 106 and an insulating layer 107, the conductor layer 106 is wrapped by the fire-resistant layer 102, and the insulating layer 107 is wrapped on a side of the fire-resistant layer 102 away from the conductor layer 106.

In an alternative embodiment, the conductor layer 106 is an annealed copper conductor, and the insulating layer 107 is a cross-linked polyethylene material.

Optionally, the annealed copper conductors used for the conductor layer 106 are first and second types of annealed copper conductors; optionally, the insulating layer has an average thickness of 0.7-2.8 mm.

In an alternative embodiment, the copper wire has a diameter of 0.05 to 0.3 mm.

As an optional embodiment, the high-fire-resistance cable further includes a filling layer 108, and the filling layer 108 is filled and disposed between the cable cores.

As an alternative embodiment, the filling layer 108 is an inorganic paper filling rope.

As an alternative embodiment, the inorganic paper filled rope comprises inorganic paper rope coated with hydroxide compound and glass fiber rope.

Wherein, adopt inorganic paper filler rope's filling layer 108 to fill the clearance between the cable core, precipitate the crystal water under high temperature, effectively reduce cable core temperature. The glass fiber rope has good fire resistance and can keep self integrity in flame, so that the internal structure of the high-fire-resistance cable keeps compact in a high-temperature environment.

Optionally, the inorganic paper filled rope has an outer diameter of 1-16 mm.

In an alternative embodiment, the fire barrier layer 103 is a double-sided copper-plastic composite tape.

Wherein, the fire-proof layer 103 adopts a double-sided copper-plastic composite belt, and the oxygen-proof layer 101 is longitudinally wrapped and coated. It can be understood that the melting point of the double-sided copper-plastic composite belt exceeds 950 ℃, which effectively prevents flame from directly ablating the oxygen barrier layer 101. In addition, the longitudinally-wrapped double-sided copper-plastic composite tape can form a closed cylinder body, and is tightly bonded with the outer protective layer 104 to form a tight whole, so that the high-fire-resistance cable keeps stable in structure under the vibration condition; meanwhile, the airtight whole can prevent spray water from entering the inside of the high-fire-resistance cable, and the electrical insulation and the circuit integrity of a cable core are improved.

Optionally, the copper layer thickness of the double-sided copper-plastic composite belt is 1.0 mm.

In an alternative embodiment, the alarm device 105 is a thermistor wire.

Optionally, the alarm device 105 is buried in the surface of the outer sheath 104, and a corresponding interface is left at the end of the high-fire-resistance cable for connecting a corresponding alarm.

Optionally, the diameter of the thermistor wire used by the alarm device 105 is 0.2mm, and when the temperature exceeds 150 ℃, the corresponding alarm device can be triggered to alarm, so that the disaster situation can be found in time at the initial stage of the fire, the position of the fire can be quickly determined, and casualties and property loss can be reduced.

Through detecting, the utility model discloses a high fire resistance cable satisfies following performance index:

1. cable bundling combustion test: conforming to a bundled class A combustion test;

2. cable smoke density test: the minimum light transmittance is not lower than 60%;

3. and (3) cable fire resistance test: the cable is subjected to 830 ℃ flame, vibration and 15min water spray (water spray), normal power supply is maintained for 120min, and the specific standard meets GB/T19666-.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that the present invention is not limited to the particular embodiments disclosed, but is intended to cover various modifications, equivalents and alternatives falling within the spirit and scope of the present invention as defined by the appended claims.

Claims (10)

1. A high fire resistance cable with early warning function, its characterized in that includes:

an oxygen barrier layer;

the cable cores are coated by the oxygen isolation layer, and a fire-resistant layer is arranged in each cable core;

the fire insulation layer is coated on one side of the oxygen insulation layer, which is far away from the cable core;

the outer jacket, the outer jacket cladding sets up separate the fire blanket and keep away from separate one side of oxygen layer, be provided with alarm device on the outer jacket.

2. The cable with the early warning function and the high fire resistance according to claim 1, wherein the oxygen barrier layer and the outer sheath are made of a low-smoke halogen-free polyolefin material.

3. The cable with the early warning function and the high fire resistance as claimed in claim 1, wherein the fire resistant layer is a wrapping structure formed by mica tapes.

4. The cable with the early warning function and the high fire resistance as claimed in claim 3, wherein the cable core further comprises a conductor layer and an insulating layer, the conductor layer is wrapped and coated by the fire-resistant layer, and the insulating layer is coated and arranged on one side, away from the conductor layer, of the fire-resistant layer.

5. The cable with high fire resistance and an early warning function as claimed in claim 4, wherein the conductor layer is an annealed copper conductor, and the insulation layer is a cross-linked polyethylene material.

6. The cable with high fire resistance and early warning function as claimed in claim 1, further comprising a filling layer, wherein the filling layer is filled between the cable cores.

7. The cable with high fire resistance and early warning function as claimed in claim 6, wherein the filling layer is made of inorganic paper filling ropes.

8. The cable as claimed in claim 7, wherein the inorganic paper filled rope comprises inorganic paper rope coated with hydroxide and glass fiber rope.

9. The cable with the early warning function and the high fire resistance as claimed in claim 1, wherein the fire barrier layer is a double-sided copper-plastic composite tape.

10. The cable with high fire resistance and early warning function as claimed in claim 1, wherein the alarm device is a thermistor wire.

Images