Composite bending-resistant flexible fireproof cable

Abstract

The invention provides a composite bending-resistant flexible fireproof cable, which belongs to the technical field of cables and comprises a core wire, an inner protective layer, an insulating layer and an outer protective layer. The fireproof cable comprises an insulating layer, a plurality of groups of fireproof assemblies are arranged, the plurality of groups of fireproof assemblies are equidistantly distributed in the insulating layer along a cable, each group of fireproof assemblies comprises a plurality of mounting cavities, and the plurality of mounting cavities are circumferentially equidistantly distributed in the insulating layer. Each installation cavity is internally provided with two movable plates which are symmetrically arranged, and the two movable plates divide the interior of the installation cavity into a first cavity, a second cavity and a third cavity. And the inert gases in the corresponding second chamber and the third chamber can quickly extinguish the fire in the cable, so that the fire is prevented from spreading, and the use safety of the cable is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of cables, and particularly relates to a composite bend-resistant flexible fireproof cable. Background Art

[0002] A cable usually consists of several or several groups of wires, which are used to transmit electrical energy or signals. The basic structure of a cable includes a conductor, an insulating layer, an inner sheath, an outer sheath, and possibly an armored layer. The conductor is the conductive part of the cable and is responsible for transmitting electrical energy. The insulating layer isolates the conductor from the outside world to ensure that the current flows along a predetermined path. The inner sheath and the outer sheath are located inside and outside the insulating layer respectively, and are used to protect the cable from damage by the external environment.

[0003] Chinese Patent with application number CN202310423837.6, a highly flame-retardant flexible fireproof cable; includes a filling layer, a protective sleeve is provided on the outer surface of the filling layer, a plurality of inner cavities are uniformly arranged in the filling layer, elastic ring tubes are provided inside the inner cavities, an insulating layer is provided inside the elastic ring tubes, and a cable core is provided inside the insulating layer; a central cavity is provided inside the filling layer, and mounting ring sleeves are provided at both ends of the elastic ring tube; the device has stronger self-adaptive adjustment ability, effectively ensures the extrusion pressure exerted by the insulating layer on the cable core, thereby ensuring the power-on efficiency and power-on stability of the cable core; at the same time, the fixed-point cooling flame-retardant efficiency is higher, effectively avoiding major economic and safety losses, and can effectively ensure the splicing length when splicing the cable, improve the splicing efficiency, and can also thoroughly and effectively scrape the insulating layer on the outer surface of the cable core to be spliced, with simple operation and higher precision. However, in actual use of the cable, when a short circuit occurs in the cable and a fire breaks out, it is impossible to extinguish the fire at the position where the cable catches fire in time. In addition, when the degree of the fire at the position of the cable short circuit is large and the fire extinguishing method cannot extinguish the flame, it will still cause the spread of the fire, posing a safety hazard and affecting the actual use.

[0004] Therefore, there is a need to provide a composite bend-resistant flexible fireproof cable. Summary of the Invention

[0005] The purpose of the present invention is to provide a composite bend-resistant flexible fireproof cable, aiming to solve the problem that when a short circuit occurs in the cable and a fire breaks out, it is impossible to extinguish the fire at the position where the cable catches fire in time.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A composite bend-resistant flexible fireproof cable is sequentially provided with a core wire, an inner sheath, an insulating layer, and an outer sheath from the inside to the outside, and further includes:

[0008] A fire prevention component, multiple groups of which are provided, and the multiple groups of fire prevention components are equidistantly distributed along the cable in the interior of the insulating layer for extinguishing a burning cable.

[0009] And a heat dissipation component, multiple groups of which are provided, and the multiple groups of heat dissipation components are equidistantly distributed along the cable in the interior of the insulating layer, and the heat dissipation components and the fire prevention components are alternately arranged for dissipating heat from the cable.

[0010] As a further solution of the present invention, each group of the fire prevention components includes a plurality of installation cavities, and the plurality of installation cavities are circumferentially and equidistantly distributed in the interior of the insulating layer. Two symmetrically arranged movable plates are provided inside each installation cavity, and the two movable plates divide the interior of the installation cavity into a first chamber, a second chamber and a third chamber.

[0011] As a further solution of the present invention, one side of each movable plate close to the inner protective layer is hinged to the outer wall of the inner protective layer, and the other side of each movable plate away from the inner protective layer is slidably connected to the inner wall of the outer protective layer. Each movable plate is also slidably connected to the inner wall of the installation cavity. The distance between the two movable plates inside each installation cavity on the side close to the inner protective layer is greater than the distance on the side away from the inner protective layer.

[0012] As a further solution of the present invention, a pressing plate is slidably connected inside each first chamber, and the pressing plate divides the interior of the first chamber into a fourth chamber and a fifth chamber. An expanding gas is filled inside each fourth chamber.

[0013] As a further solution of the present invention, communication grooves are provided on the inner walls of each second chamber and third chamber. Each second chamber and third chamber are connected to the second chambers and third chambers in the adjacent fire prevention components through the communication grooves. Inert gases are filled inside each second chamber and third chamber.

[0014] As a further solution of the present invention, when the expanding gas inside each fourth chamber expands due to heat, it can cause the pressing plate inside each first chamber to move towards the outer protective layer. Each moving pressing plate can cause the movable plates inside each installation cavity to squeeze the inert gases inside the second chamber and third chamber, enabling the inert gases inside the second chamber and third chamber to enter the second chambers and third chambers in the adjacent fire prevention components.

[0015] As a further solution of the present invention, each of the heat dissipation components includes a plurality of adjustment cavities that are evenly distributed at equal intervals in a circle inside the insulating layer. A heat dissipation pipe communicating with the outside is provided inside each of the adjustment cavities. A partition plate is fixedly connected inside each of the adjustment cavities. The partition plate divides the inside of the adjustment cavity into a sixth chamber and a seventh chamber. A piston plate is slidably connected inside each of the sixth chambers.

[0016] As a further solution of the present invention, a limiting sleeve is fixedly connected inside each of the heat dissipation pipes. A plugging member is slidably connected inside each of the heat dissipation pipes. A plurality of sliding grooves are formed in the inner wall of each of the heat dissipation pipes. A connecting member is slidably connected inside each of the sliding grooves. One end of each of the connecting members away from the inner wall of the adjustment cavity is fixedly connected to the plugging member. The limiting sleeve, the plugging member, and the connecting member are all arranged inside the seventh chamber.

[0017] As a further solution of the present invention, a connecting sleeve is fixedly connected to one side of each of the piston plates away from the inner protective layer. One end of each of the connecting sleeves away from the piston plate penetrates through the partition plate and extends into the inside of the seventh chamber. One end of each of the connecting sleeves away from the piston plate is fixedly connected to one end of the connecting member away from the plugging member.

[0018] As a further solution of the present invention, the number of adjustment cavities provided in each group of the heat dissipation components is the same as the number of installation cavities provided in each group of the fire prevention components. The positions of the adjustment cavities in each group of the heat dissipation components are arranged in one-to-one correspondence with the positions of the installation cavities in each group of the fire prevention components. A diversion groove is formed in the inner wall of each of the fifth chambers. Each of the fifth chambers is communicated with the sixth chamber in the adjacent heat dissipation component through the diversion groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. Through the setting of the fire prevention component, when a fire occurs due to a short circuit during the use of the cable, the fire generated by the cable will burn through the inner protective layer. Subsequently, the inert gas inside the corresponding second chamber and third chamber will quickly extinguish the fire in the cable, preventing the spread of the fire and causing potential safety hazards, and improving the safety of cable use.

[0021] 2. Through the settings of the second chamber, the third chamber, and the fourth chamber, in the event of a relatively large-scale fire in the cable due to a short circuit, when the amount of inert gas inside the second chamber and the third chamber corresponding to this position cannot completely extinguish the fire, the expansion gas inside the fourth chamber in the fire prevention component adjacent to the fire location will expand under the influence of the heat radiation of the fire. This will cause the pressing plate inside the corresponding first chamber to move towards the outer protective layer, and the movable plate inside the corresponding first chamber will squeeze the inert gas inside the corresponding second chamber and the third chamber, causing the inert gas inside the corresponding second chamber and the third chamber to enter the interior of the second chamber and the third chamber corresponding to the fire location, further extinguishing the fire until the fire is completely extinguished. This effectively avoids the potential safety hazards caused by the spread of the fire at the cable fire location after the inert gas is used up when a relatively large fire occurs in the cable due to a short circuit, and further improves the safety of cable use.

[0022] 3. Through the setting of the heat dissipation component, when a fire occurs in the cable due to a short circuit, the expansion gas inside the fourth chamber in the fire prevention component adjacent to the fire location will expand under the influence of the heat radiation of the fire. This will cause the pressing plate inside the corresponding first chamber to move towards the outer protective layer, and it will squeeze the gas inside the fifth chamber to enter the corresponding sixth chamber through the diversion groove, increasing the air pressure inside the sixth chamber and pushing the piston plate to move towards the inner protective layer inside the sixth chamber, causing the sealing member to disengage from the contact with the limiting sleeve. This allows the heat flow inside the cable to pass through the gap between the sealing member and the heat dissipation tube and flow into the outside through the limiting sleeve for heat dissipation, avoiding the phenomenon of secondary spontaneous combustion at a relatively high temperature inside the cable at the adjacent position after the fire at the cable location is extinguished by the inert gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the fire prevention component of the present invention;

[0025] Figure 2 is a distribution diagram of the heat dissipation component of the present invention;

[0026] Figure 3 is a schematic structural diagram of the installation cavity of the present invention;

[0027] Figure 4 is a partial structural diagram of the present invention;

[0028] Figure 5 is a schematic structural diagram of the pressing plate of the present invention;

[0029] Figure 6Schematic structural diagram of the heat dissipation component of the present invention;

[0030] Figure 7 Schematic structural diagram of the adjustment cavity of the present invention.

[0031] In the figure: 1, core wire; 2, inner protective layer; 3, insulating layer; 4, outer protective layer; 5, fire prevention component; 51, installation cavity; 52, movable plate; 53, first chamber; 54, second chamber; 55, third chamber; 56, extrusion plate; 57, fourth chamber; 58, fifth chamber; 59, communication groove; 510, diversion groove; 6, heat dissipation component; 61, adjustment cavity; 62, heat dissipation pipe; 63, partition plate; 64, sixth chamber; 65, seventh chamber; 66, piston plate; 67, connecting sleeve; 68, limiting sleeve; 69, plugging member; 610, sliding groove; 611, connecting member. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1

[0034] During the actual use of the cable, when a short circuit occurs in the cable and a fire breaks out, it is impossible to extinguish the fire at the position where the cable catches fire in time, resulting in the spread of the fire and posing a safety hazard.

[0035] Please refer to Figure 1 - Figure 4 , the present invention provides the following technical solutions: A composite flexible fire-resistant cable with bending resistance, which is sequentially provided with a core wire 1, an inner protective layer 2, an insulating layer 3 and an outer protective layer 4 from the inside to the outside, and further includes: a fire prevention component 5, multiple groups of fire prevention components 5 are arranged at equal distances along the cable line inside the insulating layer 3, each group of fire prevention components 5 includes a plurality of installation cavities 51, the plurality of installation cavities 51 are arranged at equal circumferential distances inside the insulating layer 3, and two symmetrically arranged movable plates 52 are provided inside each installation cavity 51. The two movable plates 52 divide the inside of the installation cavity 51 into a first chamber 53, a second chamber 54 and a third chamber 55. Inert gas is filled inside each second chamber 54 and third chamber 55 for extinguishing the fire of the burning cable.

[0036] Multiple groups of fire prevention components 5 are provided, and each group of fire prevention components 5 is responsible for the safety of a section of the cable, that is, the inert gas inside all the second chambers 54 and third chambers 55 in a group of fire prevention components 5 can extinguish the fire of a section of the cable.

[0037] It should be noted that when a fire breaks out due to a short circuit during the use of the cable, the fire prevention component 5 corresponding to the location where the cable catches fire will operate. When the cable catches fire, the inner sheath 2 will be burned through, and then the inert gas inside the corresponding second chamber 54 and third chamber 55 will quickly extinguish the fire in the cable, preventing the fire from spreading and causing potential safety hazards.

[0038] With the setting of the fire prevention component 5 in the present invention, when a fire breaks out due to a short circuit during the use of the cable, the inner sheath 2 will be burned through. Subsequently, the inert gas inside the corresponding second chamber 54 and third chamber 55 will quickly extinguish the fire in the cable, preventing the fire from spreading and causing potential safety hazards, thereby improving the safety of cable use.

[0039] Embodiment 2

[0040] Based on the above embodiment, when the degree of the fire caused by the short circuit of the cable is relatively large, at this time, the amount of inert gas inside the second chamber and the third chamber at this position cannot completely extinguish the fire, resulting in the fire at this position of the cable continuing to spread after the inert gas is used up, still causing potential safety hazards and affecting the actual use.

[0041] Please refer to Figure 1 - Figure 5 , on one side of each movable plate 52 close to the inner sheath 2, it is hinged to the outer wall of the inner sheath 2. On the side of each movable plate 52 far from the inner sheath 2, it is slidably connected to the inner wall of the outer sheath 4. Each movable plate 52 is also slidably connected to the inner wall of the installation cavity 51. As Figure 3 shown, the distance between the two movable plates 52 inside each installation cavity 51 on the side close to the inner sheath 2 is greater than the distance on the side far from the inner sheath 2, and they are arranged in an inclined and symmetric manner. The width of the pressing plate 56 should be the same as the distance between the two movable plates 52 inside the same installation cavity 51 on the side close to the inner sheath 2. The purpose is that when the expansion gas inside the fourth chamber 57 expands due to heat, the pressing plate 56 can be pushed under the action of the expansion gas, and the two movable plates 52 inside the same installation cavity 51 move away from each other, that is, the two movable plates 52 rotate on the side close to the inner sheath 2, and the two movable plates 52 slide away from each other inside the installation cavity 51 on the side far from the inner sheath 2;

[0042] A pressing plate 56 is slidably connected inside each first chamber 53. The pressing plate 56 divides the interior of the first chamber 53 into a fourth chamber 57 and a fifth chamber 58. An expansion gas is filled inside each fourth chamber 57;

[0043] A communication groove 59 is provided on the inner wall of each second chamber 54 and third chamber 55. Each second chamber 54 and third chamber 55 are connected to the second chamber 54 and third chamber 55 in the adjacent fire prevention component 5 through the communication groove 59;

[0044] When the expansion gas inside each fourth chamber 57 expands due to heat, it can cause the pressing plate 56 inside each first chamber 53 to move towards the outer sheath 4. Each moving pressing plate 56 can cause the movable plate 52 inside each mounting chamber 51 to press the inert gas inside the second chamber 54 and the third chamber 55, enabling the inert gas inside the second chamber 54 and the third chamber 55 to enter the second chamber 54 and the third chamber 55 of the adjacent fire protection component 5.

[0045] In the normal state, that is, when the cable is in normal use and there is no fire caused by a short circuit, the inert gas inside the second chamber 54 and the third chamber 55 of the adjacent fire protection component 5 is interconnected at this time. Affected by the pressure of the inert gas, it will maintain a stable state and can press the movable plate 52 to limit the pressing plate 56. At this time, the expansion gas inside the fourth chamber 57 will not cause the pressing plate 56 inside the first chamber 53 to move towards the outer sheath 4 when it expands due to heat.

[0046] It should be noted that when the cable is in normal use and there is a relatively large fire caused by a short circuit, the inert gas inside the second chamber 54 and the third chamber 55 corresponding to the fire location will be consumed, resulting in a weakened pressure inside the second chamber 54 and the third chamber 55 corresponding to this location. The expansion gas inside the fourth chamber 57 of the fire protection component 5 adjacent to the fire will expand under the influence of the heat radiation of the fire, causing the pressing plate 56 inside the corresponding first chamber 53 to move towards the outer sheath 4, causing the movable plate 52 inside the corresponding first chamber 53 to press the inert gas inside the corresponding second chamber 54 and the third chamber 55, enabling the inert gas inside the corresponding second chamber 54 and the third chamber 55 to enter the second chamber 54 and the third chamber 55 corresponding to the fire location through the communication groove 59, that is, the gas with a higher pressure will flow to the location with a lower pressure to achieve pressure balance. The inert gas entering the second chamber 54 and the third chamber 55 corresponding to the fire location will further extinguish the fire until the fire is completely extinguished. Thus, through the self-regulation of the inert gas, it is possible to prevent the fire at the cable fire location from continuing to spread after the inert gas is used up, causing potential safety hazards, and further improving the safety of cable use.

[0047] Through the provision of the second chamber 54, the third chamber 55, and the fourth chamber 57, when a relatively large-scale fire occurs in the cable due to a short circuit, and the amount of inert gas inside the second chamber 54 and the third chamber 55 corresponding to this position cannot completely extinguish the fire, the expansion gas inside the fourth chamber 57 in the fire prevention component 5 adjacent to the fire location will expand under the influence of the heat radiation of the fire, causing the pressing plate 56 inside the corresponding first chamber 53 to move towards the outer sheath 4, causing the movable plate 52 inside the corresponding first chamber 53 to squeeze the inert gas inside the corresponding second chamber 54 and the third chamber 55, so that the inert gas inside the corresponding second chamber 54 and the third chamber 55 enters the inside of the second chamber 54 and the third chamber 55 corresponding to the fire location, further extinguishing the fire until the fire is completely extinguished, effectively avoiding the potential safety hazard caused by the continuous spread of the fire at the fire location of the cable when a relatively large fire occurs due to a short circuit, and further improving the safety of cable use.

[0048] Embodiment III

[0049] Please refer to Figure 4 - Figure 7 , on the basis of the above embodiment, when a fire occurs in the cable, the heat of the fire will generate radiation, increasing the temperature of the cables around the fire. After the fire at the location of the cable is extinguished by the inert gas, the temperature inside the cables at adjacent positions is still relatively high. If heat dissipation is not timely, it will cause the phenomenon of secondary spontaneous combustion of the cable, reducing safety.

[0050] The cable of the present invention further includes a heat dissipation component 6. There are multiple groups of heat dissipation components 6, and the multiple groups of heat dissipation components 6 are evenly distributed along the cable line inside the insulating layer 3. The heat dissipation components 6 and the fire prevention components 5 are arranged alternately, that is, one group of heat dissipation components 6 is arranged between two adjacent fire prevention components 5. Each group of heat dissipation components 6 includes a plurality of adjustment cavities 61 evenly distributed in a circular pattern inside the insulating layer 3. Inside each adjustment cavity 61, there is a heat dissipation tube 62 connected to the outside for dissipating heat from the cable;

[0051] One end of the heat dissipation tube 62 can communicate with the outside, and the other end of the heat dissipation tube 62 is connected to the inner sheath 2;

[0052] Inside each adjustment cavity 61, there is a partition plate 63 fixedly connected. The partition plate 63 divides the inside of the adjustment cavity 61 into a sixth chamber 64 and a seventh chamber 65. Inside each sixth chamber 64, there is a piston plate 66 slidably connected;

[0053] A limiting sleeve 68 is fixedly connected inside each heat dissipation pipe 62, specifically at a position close to the outside. The heat dissipation pipe 62 can communicate with the outside through the limiting sleeve 68. A blocking member 69 is slidably connected inside each heat dissipation pipe 62. A plurality of sliding grooves 610 are formed in the inner wall of each heat dissipation pipe 62. A connecting member 611 is slidably connected inside each sliding groove 610. One end of each connecting member 611 away from the inner wall of the adjustment cavity 61 is fixedly connected to the blocking member 69. The limiting sleeve 68, the blocking member 69, and the connecting member 611 are all arranged inside the seventh chamber 65. The blocking member 69 can cooperate with the limiting sleeve 68 to block the heat dissipation pipe 62. The diameter of the blocking member 69 should be smaller than the inner diameter of the heat dissipation pipe 62. The purpose is that when the blocking member 69 is separated from contact with the limiting sleeve 68, the heat flow inside the cable can pass through the gap between the blocking member 69 and the heat dissipation pipe 62 and flow into the outside through the limiting sleeve 68 for heat dissipation;

[0054] One end of each piston plate 66 away from the inner protective layer 2 is fixedly connected with a connecting sleeve 67. One end of each connecting sleeve 67 away from the piston plate 66 penetrates through the partition plate 63 and extends into the seventh chamber 65. One end of each connecting sleeve 67 away from the piston plate 66 is fixedly connected with one end of the connecting member 611 away from the blocking member 69;

[0055] The number of adjustment cavities 61 provided in each group of heat dissipation components 6 is the same as the number of installation cavities 51 provided in each group of fire protection components 5. The positions of the adjustment cavities 61 in each group of heat dissipation components 6 are arranged in one-to-one correspondence with the positions of the installation cavities 51 in each group of fire protection components 5. Specifically, the positions of the adjustment cavities 61 in each group of heat dissipation components 6 are arranged in one-to-one correspondence with the positions of the first chambers 53 in each group of fire protection components 5. A diversion groove 510 is formed in the inner wall of each fifth chamber 58. Each fifth chamber 58 is connected to the sixth chamber 64 in the adjacent heat dissipation component 6 through the diversion groove 510;

[0056] When the extrusion plate 56 moves in the direction of the outer protective layer 4, it can extrude the gas inside the fifth chamber 58, so that the gas inside the fifth chamber 58 enters the corresponding sixth chamber 64 through the diversion groove 510;

[0057] In the initial state, that is, when the cable is in normal use and there is no fire caused by a short circuit, the inert gases inside the second chamber 54 and the third chamber 55 in the adjacent fire prevention component 5 are interconnected and will remain in a stable state under the influence of the inert gas pressure. When the expansion gas inside the fourth chamber 57 expands due to heat, it will not cause the pressing plate 56 inside the first chamber 53 to move towards the outer sheath 4. The pressing plate 56 is arranged in the reverse direction close to the inner sheath 2 and can pump the gas inside the sixth chamber 64 into the fifth chamber 58. The purpose is to make the piston plate 66 move away from the inner sheath 2 through suction, so that the sealing member 69 is closely attached to the limit sleeve 68, preventing dust from the outside from entering the inside of the heat dissipation tube 62 during the normal use of the cable.

[0058] It should be noted that when a fire occurs in the cable due to a short circuit, the inert gases inside the second chamber 54 and the third chamber 55 corresponding to the fire location will be consumed, resulting in a weakened pressure inside the second chamber 54 and the third chamber 55 corresponding to that location. The expansion gas inside the fourth chamber 57 in the fire prevention component 5 adjacent to the fire will expand under the influence of the heat radiation of the fire, causing the pressing plate 56 inside the corresponding first chamber 53 to move towards the outer sheath 4. It will squeeze the gas inside the fifth chamber 58 to enter the corresponding sixth chamber 64 through the flow guide groove 510, increasing the air pressure inside the sixth chamber 64 and pushing the piston plate 66 to move towards the inner sheath 2 inside the sixth chamber 64, causing the sealing member 69 to disengage from the limit sleeve 68. The heat flow inside the cable passes through the limit sleeve 68 from the gap between the sealing member 69 and the heat dissipation tube 62 and flows into the outside for heat dissipation, avoiding the phenomenon of secondary spontaneous combustion at a higher temperature inside the cable at the adjacent position after the fire location of the cable is extinguished by the inert gas.

[0059] Through the setting of the heat dissipation component 6 in the present invention, when a fire occurs in the cable due to a short circuit, the expansion gas inside the fourth chamber 57 in the fire prevention component 5 adjacent to the fire will expand under the influence of the heat radiation of the fire, causing the pressing plate 56 inside the corresponding first chamber 53 to move towards the outer sheath 4. It will squeeze the gas inside the fifth chamber 58 to enter the corresponding sixth chamber 64 through the flow guide groove 510, increasing the air pressure inside the sixth chamber 64 and pushing the piston plate 66 to move towards the inner sheath 2 inside the sixth chamber 64, causing the sealing member 69 to disengage from the limit sleeve 68. The heat flow inside the cable passes through the limit sleeve 68 from the gap between the sealing member 69 and the heat dissipation tube 62 and flows into the outside for heat dissipation, avoiding the phenomenon of secondary spontaneous combustion at a higher temperature inside the cable at the adjacent position after the fire location of the cable is extinguished by the inert gas.

[0060] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A composite bending-resistant flexible fireproof cable, which is provided with a core wire, an inner sheath, an insulating layer and an outer sheath in sequence from the inside to the outside, characterized in that: Also includes: A fireproof component, wherein the fireproof component is provided in multiple groups, and the multiple groups of the fireproof components are evenly distributed inside the insulating layer along the cable line, and are used to extinguish the burning cable; And a heat dissipation component, wherein the heat dissipation component is provided in multiple groups, and the multiple groups of heat dissipation components are evenly distributed inside the insulation layer along the cable line, and the heat dissipation components and the fireproof components are alternately arranged to dissipate heat for the cable.

2. A composite bending-resistant flexible fireproof cable according to claim 1, characterized in that: Each group of the fire-proof components includes a plurality of installation cavities, which are equidistantly distributed in a circle inside the insulating layer. Each of the installation cavities is provided with two symmetrically arranged movable plates, which divide the interior of the installation cavity into a first chamber, a second chamber and a third chamber.

3. A composite bending-resistant flexible fireproof cable according to claim 2, characterized in that: The side of each movable plate close to the inner protective layer is hinged to the outer wall of the inner protective layer, and the side of each movable plate away from the inner protective layer is slidably connected to the inner wall of the outer protective layer. Each movable plate is slidably connected to the inner wall of the installation cavity, and the distance between the two movable plates in each installation cavity on the side close to the inner protective layer is greater than the distance on the side away from the inner protective layer.

4. A composite bending-resistant flexible fireproof cable according to claim 3, characterized in that: The interior of each of the first chambers is slidably connected to an extrusion plate, which divides the interior of the first chamber into a fourth chamber and a fifth chamber, and the interior of each of the fourth chambers is filled with expansion gas.

5. A composite bending-resistant flexible fireproof cable according to claim 4, characterized in that: A connecting groove is provided on the inner wall of each of the second chamber and the third chamber, and each of the second chamber and the third chamber is connected with the second chamber and the third chamber in the adjacent fireproof assembly through the connecting groove, and the interior of each of the second chamber and the third chamber is filled with inert gas.

6. A composite bending-resistant flexible fireproof cable according to claim 5, characterized in that: The expanding gas inside each of the fourth chambers can cause the extrusion plates inside each of the first chambers to move toward the direction close to the outer protective layer when it expands due to heat. Each of the moving extrusion plates can cause the movable plates inside each of the installation chambers to squeeze the inert gas inside the second chamber and the third chamber, so that the inert gas inside the second chamber and the third chamber can enter the interior of the second chamber and the third chamber in the adjacent fire protection assembly.

7. A composite bending-resistant flexible fireproof cable according to claim 6, characterized in that: Each group of the heat dissipation components includes a plurality of adjustment chambers equidistantly distributed in a circle inside the insulating layer, each of the adjustment chambers is provided with a heat dissipation pipe connected to the outside, each of the adjustment chambers is fixedly connected to a partition plate, the partition plate divides the interior of the adjustment chamber into a sixth chamber and a seventh chamber, and each of the sixth chambers is slidably connected to a piston plate.

8. The composite bending-resistant flexible fireproof cable according to claim 7, characterized in that: A limiting sleeve is fixedly connected to the interior of each heat dissipation tube, a sealing piece is slidably connected to the interior of each heat dissipation tube, a plurality of sliding grooves are opened on the inner wall of each heat dissipation tube, a connecting piece is slidably connected to the interior of each sliding groove, and one end of each connecting piece away from the inner wall of the regulating cavity is fixedly connected to the sealing piece, and the limiting sleeve, the sealing piece and the connecting piece are all arranged inside the seventh chamber.

9. A composite bending-resistant flexible fireproof cable according to claim 8, characterized in that: A connecting sleeve is fixedly connected to one side of each piston plate away from the inner protective layer, and one end of each connecting sleeve away from the piston plate passes through the partition plate and extends to the interior of the seventh chamber, and one end of each connecting sleeve away from the piston plate is fixedly connected to one end of the connecting piece away from the sealing piece.

10. A composite bending-resistant flexible fireproof cable according to claim 9, characterized in that: The number of adjustment cavities in each group of the heat dissipation components is consistent with the number of installation cavities in each group of the fire protection components. The positions of the adjustment cavities in each group of the heat dissipation components are arranged in a one-to-one correspondence with the positions of the installation cavities in each group of the fire protection components. A guide groove is provided on the inner wall of each of the fifth chambers, and each of the fifth chambers is connected to the sixth chamber in the adjacent heat dissipation components through the guide groove.

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