CN116631687A - Fire-resistant cable and cable cooling system - Google Patents

Abstract

The invention discloses a fire-resistant cable and a cable cooling system, which comprise an insulating protection layer, wherein a plurality of groups of fixed telescopic driving mechanisms are equidistantly arranged in the insulating protection layer along the length direction of the insulating protection layer, and a movable fire-resistant layer is arranged between every two adjacent telescopic driving mechanisms; the movable fire-resistant layer is enabled to do circumferential rotation motion relative to the telescopic driving mechanism through the rotary connecting mechanism, and the movable fire-resistant layer is controlled to move along the length direction of the insulating protective layer through the telescopic driving mechanism. According to the invention, the telescopic driving mechanism and the rotary connecting structure are arranged in the cable, and are matched with the movable fire-resistant layer for design, and under the continuous contact of a fire source, the fire-resistant layer can rotate and displace in the length direction, so that the flame is continuously resisted by utilizing the area which is not contacted by the fire source, the fire-resistant time of the cable is effectively improved, more time is won for fire extinguishment and rescue teams, the cable is protected, and the risks of power system faults, information transmission interruption and further diffusion of fire are obviously reduced.

Description

Fire-resistant cable and cable cooling system

Technical Field

The invention relates to the field of cables, in particular to a fire-resistant cable.

Background

A cable is a cable product for transmitting electrical energy or information and is generally composed of an insulating material, an electrical conductor, a sheath, and some special accessories such as connectors, terminals, etc.

A fire resistant cable is a cable that maintains proper operation of the cabling for a period of time in the event of a fire, and is commonly used in locations where fire protection or fires are likely to occur, such as buildings, tunnels, elevators, etc. Its main objective is to prevent the spread of fire and to ensure that critical equipment or systems (e.g. fire equipment, emergency lighting, emergency exit indication systems, etc.) can continue to function properly during the fire, thereby protecting people's life safety and property to the greatest extent.

Although current fire resistant cables have a high fire resistance, if a fire source is applied to a fixed location of the cable for a long period of time, the fire resistant layer at that location will eventually burn through, eventually resulting in the conductor of the cable being damaged. This is mainly due to the fact that the immobility of the refractory layer determines that it cannot avoid the influence of a continuous fire source, so that even if the refractory layer has a high fire resistance, if the fire source is continuously and locally focused, the structure will eventually lose resistance, causing the refractory layer to be penetrated. Once the cable core is exposed, the cable will lose its ability to transmit power or information, which will seriously affect the proper operation of critical systems and may even exacerbate the severity of the fire, presenting a significant risk to personnel life safety and equipment assets. Thus, this is a major challenge in existing fire resistant cable designs, and improvements and technological innovations thereto require more targeted measures to improve their fire resistance under the influence of sustained fire sources.

Disclosure of Invention

In order to solve the problems, the invention provides the fire-resistant cable and the cable cooling system, the telescopic driving mechanism and the rotary connecting structure are arranged in the cable, the design is carried out by matching with the movable fire-resistant layer, under the continuous contact of a fire source, the fire-resistant layer can rotate and carry out long-length displacement so as to continuously resist flame by utilizing the area which is not contacted by the fire source, the novel design effectively improves the fire-resistant time of the cable, gains more time for fire extinguishing and rescue teams, protects the cable, and obviously reduces the risks of power system faults, information transmission interruption and further fire diffusion.

The invention is realized by the following technical scheme: a fire resistant cable comprising:

the insulation protection layer is internally provided with a plurality of groups of fixed telescopic driving mechanisms at equal intervals along the length direction of the insulation protection layer, a movable fire-resistant layer is arranged between every two adjacent telescopic driving mechanisms, the insulation protection layer outside the telescopic driving mechanisms is internally provided with the fixed fire-resistant layer, and the cable core wires positioned in the middle of the fixed fire-resistant layer and the movable fire-resistant layer are covered by the fixed fire-resistant layer and the movable fire-resistant layer;

the rotary connecting mechanism is arranged at the connecting positions of the movable fire-resistant layer and the telescopic driving mechanism respectively, the movable fire-resistant layer is enabled to do circumferential rotary motion relative to the telescopic driving mechanism through the rotary connecting mechanism, and the movable fire-resistant layer is controlled to move along the length direction of the insulating protective layer through the telescopic driving mechanism.

As a preferable technical scheme, the rotary connecting mechanisms comprise rotating rings arranged on two sides of the movable fire-resistant layer, one end of the movable fire-resistant layer is fixedly arranged in an assembly cavity of the rotating ring, when the movable fire-resistant layer is hermetically arranged in the assembly cavity, a closed gas storage cavity is formed in the rotating ring, a driving rod is convexly arranged on the other side of the rotating ring, a gas leakage channel is arranged in the driving rod, and the gas leakage channel is communicated with the gas storage cavity;

the telescopic driving mechanism comprises two movable plugs, a fixed ring, a compression air bag and an inflatable air bag, wherein the inflatable air bag is fixedly installed on one side of the fixed ring, one movable plug is fixedly installed on the other side of the inflatable air bag, the compression air bag is fixedly installed on the other side of the fixed ring, the other movable plug is fixedly installed on the other side of the compression air bag, one side of the movable plug, which is opposite to the rotating ring, is provided with an annular groove along the end face of the movable plug, the rotating ring is rotationally assembled in the annular groove, the bottom surface of the annular groove is provided with an arc-shaped groove around the annular groove, a driving rod of the rotating ring extends into the arc-shaped groove, a rotary driving piece is arranged in the arc-shaped groove, and the rotating ring is driven to do circular rotation through the rotary driving piece.

As the preferable technical scheme, rotary driving piece includes the inflation ring that adopts elastic rubber material to make, forms the ring-shaped after the inflation ring is inflated, and when the inside no gas of inflation ring, whole inflation ring shrink forms blocky, still be provided with a fixed dog in the arc wall, fixed dog is fixed to be set up in the arc wall, and one side opening of inflation ring is fixed on fixed dog, and the inflation ring encircles the setting of arc wall round, and the opposite side opening of inflation ring sets up an air guide connecting rod, and actuating lever is connected to air guide connecting rod one end, and the air guide ring is connected to the other end, is provided with the air guide passageway in the air guide connecting rod, the air guide passageway is connected the gas leakage passageway in with inflation ring and the actuating lever and is switched on.

As the preferable technical scheme, a limiting ring is formed at the bottom of the rotating ring, the limiting ring hooks the annular groove, a first rollaway nest is formed between the outer ring of the rotating ring and the annular groove, a second rollaway nest is formed between the inner ring of the rotating ring and the annular groove, and a plurality of balls are arranged in the first rollaway nest and the second rollaway nest.

As the preferable technical scheme, encircle the inside round of movable flame retardant coating in the movable flame retardant coating and be provided with many flexible air guide strips, all set up both ends open-ended butt joint passageway in the air guide strip, the air guide strip all passes movable flame retardant coating and stretches into the gas storage intracavity in the swivel ring, and air guide communicates with each other between air guide strip, gas storage chamber and the inflatable ring.

As the preferable technical scheme, all be provided with the sealing plug on the rotary driving piece, the sealing plug all sets up on the rotary driving piece of one side of keeping away from the actuating lever, the sealing plug seals and packs into a sealed passageway, sealed passageway one end communicates with each other with the arc groove, and the other end of sealed passageway is connected with compression gasbag or inflatable balloon and communicates with each other, and when rotary driving piece was full of gas and expands into the annular shape, in this moment, detained in the sealed passageway by the sealing plug is sealed for compression gasbag or inflatable balloon seal.

As the preferable technical scheme, the outer wall surface of solid fixed ring and insulating protection layer inner wall surface fixed connection for location flexible actuating mechanism, gu fixed ring's medial surface all sets up a supporting ring, form a supporting channel in the middle of the supporting ring, gu the outer wall surface of supporting ring is provided with many supporting connection poles, is connected the supporting ring by supporting connection pole one end, and gu fixed ring inner wall surface is connected to the other end, and the cable heart yearn passes each supporting ring and supports.

As the preferable technical scheme, the compression air bag and the inflatable air bag are made of elastic rubber materials with elastic deformation capacity, the compression air bag stretches in the length direction after the external air is sucked in, the length of the inflatable air bag is increased, the inflatable air bag stretches elastically after the air is filled in, and the length of the inflatable air bag is shortened after the air in the inflatable air bag is discharged.

As a preferable technical scheme, a ventilation channel is formed inside the insulating protection layer by the movable fireproof layer and the telescopic driving mechanism.

The invention relates to a cable cooling system, which comprises a fire-resistant cable, wherein a cooling hole is formed in an insulating protective layer at a position corresponding to one or a plurality of fixing rings, the cooling hole is communicated with a ventilation channel, and the whole ventilation channel is ventilated and cooled after the cooling hole is externally connected with the cooling system.

The beneficial effects of the invention are as follows: the invention innovatively arranges a telescopic driving mechanism and a rotary connecting structure in the cable, and adopts a movable fire-resistant layer design. When the flame is in continuous contact with the moving refractory layer in a fixed zone, the layer is effective to resist the flame and protect the cable core. If the flame is in contact for a long time such that a certain part of the refractory layer is burned out, the movable refractory layer in this area may be rotated by the rotary joint structure. After rotation, the flame will contact other locations on the circumferential area of the moving refractory layer, thereby continuing to resist the flame with the rest. After a period of time, the movable refractory layer can be displaced by a distance in the length direction through the telescopic driving mechanism. The moving refractory layer at the new location will then continue to resist the flame. After displacement in the length direction, the movable refractory layer can still perform circumferential rotation, and a new contact point is replaced to resist flames. The design not only effectively promotes the fire-resistant time of the fire-resistant layer and fully utilizes the fire-resistant layer which is not contacted with flame, strives for more time for fire extinguishment and rescue teams, effectively protects the cable, but also obviously reduces the risks of power system faults, information transmission interruption, further fire disaster diffusion and the like which are possibly caused by the damage of the cable by the flame.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall external structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic diagram showing an internal structure of the insulation protection layer removed according to the present invention;

FIG. 5 is a schematic cross-sectional view of the core of FIG. 2 after removal of the core in accordance with the present invention;

FIG. 6 is an enlarged view of a portion of the invention at B in FIG. 5;

FIG. 7 is a schematic view of an assembled rotary ring and an inflatable ring according to the present invention;

FIG. 8 is a schematic diagram of another view of FIG. 7 in accordance with the present invention;

FIG. 9 is a schematic view of a partial structure of the inside of the cable of the present invention;

FIG. 10 is an enlarged view of a portion of FIG. 9 at C;

FIG. 11 is a partial enlarged view at D in FIG. 9;

reference numerals illustrate:

1. an insulating protective layer; 2. a cable core; 3. a cooling hole; 5. a movable refractory layer; 6. a movable plug; 7. a support connecting rod; 8. a fixing ring; 9. a rotary connection mechanism; 10. an inflatable airbag; 11. a support ring; 12. compressing the air bag; 13. fixing the refractory layer; 14. an air guide connecting rod; 15. a ball; 16. a fixed stop block; 17. an air-filling ring; 18. a sealing plug; 19. sealing the channel; 51. an air guide strip; 91. a second raceway; 92. a limiting ring; 93. an annular groove; 94. a gas storage chamber; 95. a driving rod; 96. a blow-by gas passage; 97. a first raceway; 98. a rotating ring; 99. an arc-shaped groove.

Detailed Description

All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.

In the description of the present invention, it should be understood that the terms "one end," "the other end," "the outer side," "the upper," "the inner side," "the horizontal," "coaxial," "the center," "the end," "the length," "the outer end," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, in the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Terms such as "upper," "lower," and the like used herein to refer to a spatially relative position are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The term spatially relative position may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "coupled," "connected," "plugged," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 and 2, the fire-resistant cable comprises an insulating protection layer 1, wherein a plurality of groups of fixed telescopic driving mechanisms are equidistantly arranged in the insulating protection layer 1 along the length direction of the insulating protection layer 1, a movable fire-resistant layer 5 is arranged between every two adjacent telescopic driving mechanisms, a fixed fire-resistant layer 13 is arranged in the insulating protection layer 1 outside the telescopic driving mechanisms, a cable core wire 2 positioned in the middle of the insulating protection layer is covered by the fixed fire-resistant layer 13 and the movable fire-resistant layer 5, the fixed fire-resistant layer 13 is responsible for protecting the fire resistance of the telescopic driving mechanisms, and a user covers most of the cable in the area by the movable fire-resistant layer 5, so that if flames exist at the cable, the basic positions are all at the positions of the movable fire-resistant layer 5, the core wire is protected by the movable fire-resistant layer 5, and the safety is higher.

The flame retardant coating device is characterized by further comprising a rotary connecting mechanism 9, wherein the rotary connecting mechanism 9 is respectively arranged at the connecting positions of the movable flame retardant coating 5 and the telescopic driving mechanism, the movable flame retardant coating 5 is enabled to do circumferential rotary motion relative to the telescopic driving mechanism through the rotary connecting mechanism 9, the movable flame retardant coating 5 is controlled to move along the length direction of the insulating protective layer 1 through the telescopic driving mechanism, and when open flame exists at the local position of a cable, after the flame breaks down the movable flame retardant coating 5, the rotary connecting mechanism 9 and the telescopic driving mechanism can be triggered.

As shown in fig. 5, 6 and 10, the rotary connection mechanism 9 comprises a rotary ring 98 arranged at two sides of the movable refractory layer 5, one end of the movable refractory layer 5 is fixedly arranged in an assembly cavity of the rotary ring 98, when the movable refractory layer 5 is hermetically arranged in the assembly cavity, a sealed gas storage cavity 94 is formed in the rotary ring 98, a driving rod 95 is convexly arranged at the other side of the rotary ring 98, a gas leakage channel 96 is arranged in the driving rod 95, and the gas leakage channel 96 is communicated with the gas storage cavity 94; the inner diameter of the air leakage channel 96 is very small, so the air leakage speed is very low, so when the movable refractory layer 5 rotates, the speed is very low, the movable refractory layer 5 can bear flame contact for a period of time at a plurality of point positions in the circumferential direction, the refractory time of the movable refractory layer 5 is fully exerted, the movable refractory layer 5 is installed from an opening at one side of the rotating ring 98, and after the movable refractory layer 5 is installed, the movable refractory layer is tightly pressed through the rotating ring 98 and sealed by sealing glue, so that the air tightness is ensured.

As shown in fig. 3 and 4, the telescopic driving mechanism comprises two movable plugs 6, a fixed ring 8, a compression air bag 12 and an inflatable air bag 10, wherein the inflatable air bag 10 is fixedly arranged on one side of the fixed ring 8, one movable plug 6 is fixedly arranged on the other side of the inflatable air bag 10, the compression air bag 12 is fixedly arranged on the other side of the fixed ring 8, and the other movable plug 6 is fixedly arranged on the other side of the compression air bag 12; the outer diameter of the movable plug 6 is equal to the inner diameter of the insulating protection layer 1, the movable plug can slide along the length direction of the insulating protection layer 1, the inflatable air bag 10 is an inflated air bag, after inflation, the air bag is elastically expanded, so that the whole inflatable air bag 10 has elastic shrinkage force, the compressed air bag 12 is an air bag after being flattened by exhaust gas, when external gas is sucked under conditions, the compressed air bag 12 can suck the external gas to recover deformation, so that the compressed air bag 12 has the capacity of ejecting the sucked gas in the length direction, one side of the movable fire-resistant layer 5 corresponds to the compressed air bag 12, and the other side corresponds to the inflatable air bag 10, so that once the inflatable air bag 10 is conducted with the compressed air bag 12 and the outside, the inflatable air bag 10 is retracted, the compressed air bag 12 is ejected, and the movable fire-resistant layer 5 can be pushed to displace a distance towards the length direction, and the change of the movable fire-resistant layer 5 in the length direction is realized.

As shown in fig. 6, one side of the movable plug 6 opposite to the rotary ring 98 is provided with an annular groove 93 along the end face of the movable plug 6, the rotary ring 98 is rotatably assembled in the annular groove 93, the bottom surface of the annular groove 93 is provided with an arc groove 99 along the annular groove 93, a driving rod 95 of the rotary ring 98 extends into the arc groove 99, a rotary driving member is arranged in the arc groove 99, the rotary ring 98 is driven by the rotary driving member to perform circumferential rotation, the rotary ring 98 can perform circumferential rotation in the annular groove 93, one end of the driving rod 95 is connected with the rotary ring 98, the other end of the driving rod 95 extends into the arc groove 99, when the rotary driving member in the arc groove 99 pushes the driving rod 95, the whole rotary ring 98 can perform circumferential rotation along the arc groove 99 and the annular groove 93, and the driving condition of the rotary driving member is that the movable refractory layer 5 is damaged.

As shown in fig. 7 and 8, the rotary driving member includes an air-filled ring 17 made of elastic rubber material, the air-filled ring 17 is formed into a ring shape after being inflated, when no air exists in the air-filled ring 17, the whole air-filled ring 17 is contracted to form a block shape, a fixed stop 16 is further provided in the arc-shaped groove 99, the fixed stop 16 is fixedly provided in the arc-shaped groove 99, one side opening of the air-filled ring 17 is fixed on the fixed stop 16, the air-filled ring 17 is arranged around the arc-shaped groove 99, the other side opening of the air-filled ring 17 is provided with an air guide connecting rod 14, one end of the air guide connecting rod 14 is connected with a driving rod 95, the other end is connected with the air-filled ring 17, an air guide channel is provided in the air-guide connecting rod 14, the air-guide channel connects the air-filled ring 17 with an air-leakage channel 96 in the driving rod 95, and the driving rod 95 is communicated with the air-storage cavity 94, so that the air-filled ring 17 is communicated with the air-storage cavity 94, but if the air-tightness of the air-storage cavity 94 is always kept, the air-tightness of the air-filled ring 17 is fixed on the fixed stop 16, the position of the driving rod 95 is always kept unchanged, the ring-shaped state is always, the position of the driving rod 95 is rotated, the ring 98 is kept, and the ring 98 is always unchanged, and the position is rotated, and the air-tight ring 98 is always rotates, and the air-tight layer 98 is kept and the air-tightly, and the air-tight layer is rotated when the air-filled and air-tightly is rotated, and the air-tight layer is rotated.

The one section of the air-filled ring 17 is fixed with the fixed stop block 16, and the fixed stop block 16 is fixed in the rotating ring 98, so after the air in the air-filled ring 17 is discharged, the air-filled ring 17 takes the shape of a ring due to air filling, and along with the continuous discharge of the air in the air-filled ring 17, the movable end of the air-filled ring 17, namely the position connected with the air guide connecting rod 14, rotates circumferentially along the arc-shaped groove 99, the air guide connecting rod 14 is connected with the driving rod 95, and the rotating ring 98 can be driven to rotate by the reset of the air-filled ring 17, so that the movable refractory layer 5 can be driven to rotate circumferentially at the moment.

The bottom of the rotating ring 98 forms a limiting ring 92, the limiting ring 92 hooks the annular groove 93, a first rolling way 97 is formed between the outer ring of the rotating ring 98 and the annular groove 93, a second rolling way 91 is formed between the inner ring of the rotating ring 98 and the annular groove 93, a plurality of balls 15 are arranged in the first rolling way 97 and the second rolling way 91, the rotating ring 98 is placed and separated from the annular groove 93 through the limiting ring 92, the purpose of rotating and assembling is achieved, in order to reduce the rotating friction force between the rotating ring 98 and the movable plug 6, the rotating ring 98 and the movable plug 6 are connected through the balls 15 in a rotating mode, and the friction force is effectively reduced through an inner ball 15 structure and an outer ball 15 structure, so that the movable refractory layer 5 can rotate better.

The movable fire-resistant layer 5 is internally provided with a plurality of flexible air guide strips 51 around the movable fire-resistant layer 5, butt joint channels with two open ends are arranged in the air guide strips 51, the air guide strips 51 penetrate through the movable fire-resistant layer 5 and extend into the air storage cavity 94 in the rotating ring 98, and the air guide strips 51, the air storage cavity 94 and the air guide ring 17 are communicated with each other, as shown in fig. 6 and 9, the air guide strips 51 are made of rubber materials which cannot be deformed and can be damaged by flame, but cannot be elastically expanded, the air guide strips 51 are filled with air, when the movable fire-resistant layer 5 is locally damaged by flame, one of the air guide strips 51 is damaged by air leakage, at the moment, the air storage cavity 94 loses air tightness, at the moment, the air in the air-filled ring 17 passes through the air leakage channel 96 from the air guide connecting rod 14 and enters the air storage cavity 94, and then flows out from the air guide strips 51, and the air in the air-filled ring 17 slowly flows out from the air channel 96, so that the air-filled ring 17 drives the moving speed of the rotating ring 98 to be slow, the air continuously flows out from the air-filled ring 17, the rotating ring 17 can be damaged by flame, but the air can not continuously flows out from the rotating ring 17, the rotating ring 98 is driven by flame, and the rotating ring 98 is driven by flame to rotate by the rotating 5, and the flame-resistant layer 5 can be contacted with the fire-resistant layer 5, and the flame can not rotate, and the flame can be rotated by the flame-resistant layer is greatly and the flame-resistant layer is contacted by the flame.

As shown in fig. 8 and 11, the rotary driving members are provided with sealing plugs 18, the sealing plugs 18 are arranged on the rotary driving member at one side far away from the driving rod 95, the sealing plugs 18 are sealed and installed in a sealing channel 19, one end of the sealing channel 19 is communicated with an arc-shaped groove 99, the other end of the sealing channel 19 is communicated with the compression air bag 12 or the inflatable air bag 10, when the rotary driving member is fully inflated into a ring shape, the sealing plugs 18 are sealed and buckled into the sealing channel 19 at the moment, so that the compression air bag 12 or the inflatable air bag 10 is sealed, when the gas in the inflatable ring 17 is not discharged to the sealing plug 18, the air tightness between the inflatable air bag 10 and the compression air bag 12 is not damaged, the movable refractory layer 5 is not changed in the length direction, and then the rotary ring 98 is continuously rotated along with the continuous discharge of the gas of the inflatable ring 17, when the movable end of the air-filled ring 17 finally passes through the sealing plug 18, the sealing plug 18 positioned on the air-filled ring 17 is pulled out of the sealing channel 19, as shown in fig. 9, the sealing channel 19 is opened, the compressed air bag 12 and the air-filled air bag 10 are opened, the air of the air-filled air bag 10 is discharged, the length of the air-filled air bag 10 is shortened, the compressed air bag 12 is sucked into the air assembly to recover deformation, and at the moment, the movable air bag 6 is pushed at one side and pulled back at one side, the change of the length direction of the movable refractory layer 5 can be achieved, so that before the circumference of the air-filled ring 17 is halved, the movable refractory layer 5 can not change in length, only does circular rotation movement, when the air-filled ring 17 discharges air, after exceeding one half of the circumference, the sealing plug 18 can be pulled out, the sealing channel 19 is conducted, and at the moment, the movable refractory layer 5 can be continuously pushed along with the continuous sucked air and discharged air of the compressed air bag 12 and the air-filled air bag 10, after the longitudinal movement is started, the whole rotating ring 98 continuously rotates along with the continuous release of the gas-filled ring 17, the movable refractory layer 5 keeps rotating circumferentially, and a new area is continuously used for contacting flame, so that the fire resistance is improved.

As shown in fig. 2 and 3, the outer wall surface of the fixed ring 8 is fixedly connected with the inner wall surface of the insulating protection layer 1, and is used for positioning the telescopic driving mechanism, the inner side surface of the fixed ring 8 is provided with a supporting ring 11, a supporting channel is formed in the middle of the supporting ring 11, the outer wall surface of the supporting ring 11 is provided with a plurality of supporting connecting rods 7, one end of each supporting connecting rod 7 is connected with the supporting ring 11, the other end of each supporting connecting rod is connected with the inner wall surface of the fixed ring 8, the cable core wire 2 passes through each supporting ring 11 to be supported, the cable core wire 2 is suspended and supported in the insulating protection layer 1, and the centering of the cable core wire 2 is kept without influencing the rotation of the rotating ring 98 and the movable fireproof layer 5.

The compression air bag 12 and the inflatable air bag 10 are made of elastic rubber materials with elastic deformation capability, the compression air bag 12 stretches in the length direction after external air is sucked in, the length of the compression air bag is increased, the inflatable air bag 10 stretches elastically after gas is filled in, and the length of the inflatable air bag 10 is shortened after gas in the inflatable air bag 10 is discharged.

A ventilation channel is formed inside an insulating protection layer 1 by a movable fire-resistant layer 5 and a telescopic driving mechanism, in order to improve heat dissipation capability, a cooling hole 3 is formed in the insulating protection layer 1 corresponding to one of the fixing rings 8 or the positions of a plurality of fixing rings 8, the cooling hole 3 is communicated with the ventilation channel, the whole ventilation channel is ventilated and cooled after the cooling hole 3 is externally connected with a cooling system, the cooling system can be a blower and the like, the cooling hole 3 can be normally closed, a blowing pipe is inserted when the cooling system is needed to be used, the cooling hole 3 is opened, then one end of the blowing pipe is connected with the blower, air flow is blown into the ventilation channel by the blower, the purpose of cooling a cable core wire 2 is achieved, the cooling system can be always connected, a temperature sensor is arranged in the peripheral area or the inside of the cable, and the purpose of cooling is achieved by starting the cooling system according to the temperature value of the core wire.

The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any changes or substitutions that do not undergo the inventive effort should be construed as falling within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims (10)

1. A fire resistant cable comprising:

the cable core wire structure comprises an insulating protection layer (1), wherein a plurality of groups of fixed telescopic driving mechanisms are equidistantly arranged in the insulating protection layer (1) along the length direction of the insulating protection layer (1), a movable fire-resistant layer (5) is arranged between every two adjacent telescopic driving mechanisms, a fixed fire-resistant layer (13) is arranged in the insulating protection layer (1) outside the telescopic driving mechanisms, and a cable core wire (2) positioned in the middle of the insulating protection layer is covered by the fixed fire-resistant layer (13) and the movable fire-resistant layer (5);

the rotary connecting mechanism (9), rotary connecting mechanism (9) set up respectively in the hookup location of movable flame retardant coating (5) and flexible actuating mechanism, make movable flame retardant coating (5) relative flexible actuating mechanism carry out circumference rotary motion through rotary connecting mechanism (9), control movable flame retardant coating (5) along insulating protective layer (1) length direction through flexible actuating mechanism and remove.

2. The fire resistant cable according to claim 1, characterized in that: the rotary connecting mechanisms (9) comprise rotating rings (98) arranged on two sides of the movable fireproof layer (5), one end of the movable fireproof layer (5) is fixedly arranged in an assembly cavity of the rotating rings (98), when the movable fireproof layer (5) is hermetically arranged in the assembly cavity, a closed gas storage cavity (94) is formed in the rotating rings (98), a driving rod (95) is convexly arranged on the other side of the rotating rings (98), a gas leakage channel (96) is formed in the driving rod (95), and the gas leakage channel (96) is communicated with the gas storage cavity (94);

the telescopic driving mechanism comprises two movable plugs (6), a fixed ring (8), a compression air bag (12) and an inflatable air bag (10), wherein the inflatable air bag (10) is fixedly installed on one side of the fixed ring (8), one movable plug (6) is fixedly installed on the other side of the inflatable air bag (10), the compression air bag (12) is fixedly installed on the other side of the fixed ring (8), the other movable plug (6) is fixedly installed on the other side of the compression air bag (12), one annular groove (93) is formed in one side of the movable plug (6) opposite to the rotating ring (98) along the end face of the movable plug (6), the rotating ring (98) is assembled in the annular groove (93) in a rotating mode, an arc-shaped groove (99) is formed in the bottom face of the annular groove (93) in a circle, a driving rod (95) of the rotating ring (98) stretches into the arc-shaped groove (99), and a rotating driving piece is arranged in the arc-shaped groove (99), and the rotating ring (98) is driven to do circular rotation through the rotating driving piece.

3. The fire resistant cable according to claim 2, characterized in that: the rotary driving piece comprises an inflatable ring (17) made of elastic rubber materials, the inflatable ring (17) is annular after being inflated, when no gas exists in the inflatable ring (17), the whole inflatable ring (17) is contracted to form a block shape, a fixed stop block (16) is further arranged in the arc-shaped groove (99), the fixed stop block (16) is fixedly arranged in the arc-shaped groove (99), one side opening of the inflatable ring (17) is fixed on the fixed stop block (16), the inflatable ring (17) is arranged around the arc-shaped groove (99) in a circle, one end of the inflatable ring (17) is provided with an air guide connecting rod (14), one end of the air guide connecting rod (14) is connected with a driving rod (95), the other end of the air guide connecting rod is connected with the inflatable ring (17), and an air guide channel is arranged in the air guide connecting rod (14) and is connected with an air leakage channel (96) in the driving rod (95).

4. The fire resistant cable according to claim 2, characterized in that: a limiting ring (92) is formed at the bottom of the rotating ring (98), the limiting ring (92) hooks the annular groove (93), a first rolling path (97) is formed between the outer ring of the rotating ring (98) and the annular groove (93), a second rolling path (91) is formed between the inner ring of the rotating ring (98) and the annular groove (93), and a plurality of balls (15) are arranged in the first rolling path (97) and the second rolling path (91).

5. The fire resistant cable according to claim 2, characterized in that: the movable fireproof layer (5) is internally provided with a plurality of flexible air guide strips (51) in a circle, two ends of which are provided with butt joint channels are arranged in the air guide strips (51), the air guide strips (51) penetrate through the movable fireproof layer (5) and extend into an air storage cavity (94) in the rotating ring (98), and the air guide strips (51), the air storage cavity (94) and the air charging ring (17) are communicated with each other through air guide.

6. The fire resistant cable according to claim 2, characterized in that: the rotary driving piece is provided with sealing plugs (18), the sealing plugs (18) are arranged on the rotary driving piece far away from one side of the driving rod (95), the sealing plugs (18) are sealed and installed in a sealing channel (19), one end of the sealing channel (19) is communicated with an arc-shaped groove (99), the other end of the sealing channel (19) is communicated with a compression air bag (12) or an inflatable air bag (10), and when the rotary driving piece is fully inflated into a ring shape, the sealing plugs (18) are sealed and buckled into the sealing channel (19) at the moment, so that the compression air bag (12) or the inflatable air bag (10) is sealed.

7. The fire resistant cable according to claim 2, characterized in that: the outer wall surface of fixed ring (8) and insulating protection layer (1) internal face fixed connection for location flexible actuating mechanism, the medial surface of fixed ring (8) all sets up a supporting ring (11), form a supporting channel in the middle of supporting ring (11), supporting ring (11) external wall surface is provided with many support connecting rods (7), by support connecting rod (7) one end connection supporting ring (11), other end connection fixed ring (8) internal face, cable core wire (2) pass each supporting ring (11) and support.

8. The fire resistant cable according to claim 2, characterized in that: the compression air bag (12) and the inflatable air bag (10) are made of elastic rubber materials with elastic deformation capacity, the compression air bag (12) stretches in the length direction after external air is sucked in, the length is increased, the inflatable air bag (10) stretches elastically after gas is filled in, and the length is shortened after gas in the inflatable air bag (10) is discharged.

9. The fire resistant cable according to claim 1, characterized in that: a ventilation channel is formed inside the insulating protection layer (1) by the movable fireproof layer (5) and the telescopic driving mechanism.

10. A cable cooling system, characterized in that: the fire-resistant cable according to any one of claims 1 to 9, wherein a cooling hole (3) is formed in the insulating protection layer (1) at a position corresponding to one of the fixing rings (8) or the fixing rings (8), the cooling hole (3) is communicated with the ventilation channel, and the ventilation and cooling are performed on the whole ventilation channel after the cooling hole (3) is externally connected with a cooling system.