A flexible multi-core aluminum alloy fireproof cable

Abstract

The present invention relates to the field of cable technology, and proposes a flexible multi-core aluminum alloy fireproof cable, including an aluminum alloy conductor and a flame-retardant outer sheath, wherein the aluminum alloy conductor is provided with a plurality of conductors, and also includes a conductor shield, an insulating layer, an insulating shield, an armor layer, a thermal insulation layer, a high-temperature resistant filling, a connection assembly and a fire extinguishing assembly, wherein the connection assembly is used to connect two sections of the aluminum alloy conductor, and the connection assembly includes a connector, a connector seat, a plug, a socket and a limiter, wherein the connector and the connector seat are respectively arranged on both sides of the flame-retardant outer sheath, wherein the plug is provided with a plurality of plugs, which are arranged inside the connector seat, wherein the socket is provided with a plurality of sockets, which are arranged inside the connector, wherein the plug and the socket are plugged in and matched, and the limiter is used to limit the position of the connector and the connector seat after they are connected, and the fire extinguishing assembly is used to timely extinguish the internal flame of the flame-retardant outer sheath. Through the above technical scheme, the problem of poor fireproofing effect of using flame-retardant materials to fireproof cables in the prior art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a flexible multi-core aluminum alloy fireproof cable. Background Art

[0002] Aluminum alloy power cable is a new type of power cable with AA8030 series aluminum alloy as conductor, special roll-formed wire stranding production process and annealing treatment and other advanced technologies. The alloy power cable makes up for the shortcomings of pure aluminum cables in the past. Although the electrical conductivity of the cable is not improved, the bending performance, creep resistance and corrosion resistance are greatly improved, which can ensure that the cable maintains continuous performance stability when overloaded and overheated for a long time. The use of AA-8030 series aluminum alloy conductors can greatly improve the conductivity and high temperature resistance of aluminum alloy cables, and solve the problems of pure aluminum conductors and creep. The use of aluminum alloy cables instead of copper cables can reduce cable weight, reduce installation costs, reduce wear on equipment and cables, and make installation easier.

[0003] The good mechanical and electrical properties of aluminum alloy cables make them widely used in various fields of the national economy. With the development of technology, more and more electrical equipment and greater power loads are being used, and power supply safety is particularly important. Cables are in a state of transmitting large power loads for a long time, which is more likely to cause fires. Traditional fireproof cables mainly rely on flame retardant materials to protect cables from fire, and their fireproof effects are relatively limited. When the temperature exceeds the flame retardant range of the flame retardant material, combustion will still occur. In addition, the cable is usually long, and after combustion, the fire quickly spreads to the entire cable, causing greater property losses and safety accidents. Therefore, we propose a flexible multi-core aluminum alloy fireproof cable with good fireproof effect, which can effectively prevent the spread of fire. Summary of the invention

[0004] The invention provides a flexible multi-core aluminum alloy fireproof cable, which solves the problem that the fireproofing effect of the cable using flame-retardant materials in the prior art is poor.

[0005] The technical solution of the present invention is as follows:

[0006] A flexible multi-core aluminum alloy fireproof cable, comprising an aluminum alloy conductor and a flame retardant outer sheath, wherein a plurality of the aluminum alloy conductors are provided, and further comprising:

[0007] A conductor shield, wherein the conductor shield is wrapped around the outside of the aluminum alloy conductor;

[0008] An insulating layer, the insulating layer being wrapped around the outside of the conductor shield;

[0009] An insulation shield, the insulation shield is wrapped outside the insulation layer;

[0010] An armor layer, the armor layer being wrapped around the outside of the insulation shield;

[0011] A thermal insulation layer, the thermal insulation layer is located outside the plurality of armor layers, and a high flame retardant tape is provided on the inner and outer sides of the thermal insulation layer;

[0012] High temperature resistant filling, the high temperature resistant filling is arranged between the plurality of armor layers and the thermal insulation layer;

[0013] A connecting assembly, the connecting assembly is used to connect two sections of the aluminum alloy conductor, the connecting assembly comprises:

[0014] A connector and a connector seat, wherein the connector and the connector seat are respectively arranged on two sides of the flame-retardant outer sheath;

[0015] A plug, wherein a plurality of the plugs are provided, the plugs correspond to the aluminum alloy conductors one by one, and the plugs are arranged inside the connection seat;

[0016] A socket, wherein a plurality of sockets are provided, the sockets correspond to the aluminum alloy conductors one by one, the sockets are arranged inside the connector, and the plug and the sockets are plugged and matched;

[0017] A limiting member, the limiting member is used to limit the position of the connector and the connector seat after they are connected, and the limiting member includes:

[0018] A positioning rod, wherein a plurality of the positioning rods are provided, and the positioning rods are arranged on a side of the connecting seat away from the flame-retardant outer sheath, and the connecting head is provided with a plurality of positioning holes matching the positioning rods;

[0019] A limiting rod, wherein a plurality of limiting rods are provided, and each of the limiting rods corresponds to the positioning rods one by one. The limiting rods are slidably arranged on the connecting head, and the positioning rods are provided with limiting grooves matching with the limiting rods;

[0020] A limit plate, wherein the limit plate is fixedly sleeved on the outside of the limit rod, a plurality of limit cavities are provided on the connecting head, the limit plate is located inside the limit cavity, and a limit spring is provided between the limit plate and the inner wall of the limit cavity;

[0021] A fire extinguishing assembly, which is used to timely extinguish the internal flame of the flame retardant outer sheath, and the fire extinguishing assembly comprises:

[0022] An airbag, wherein the connecting head and the connecting seat are both provided with an air storage cavity, and the airbag is arranged inside the air storage cavity;

[0023] A fireproof layer, the fireproof layer is arranged between the thermal insulation layer and the flame-retardant outer sheath, the fireproof layer is a hollow structure, and the fireproof layer is connected to the gas storage cavity through a plurality of air outlet holes;

[0024] A needle, the connector and the connector base are both provided with a needle groove matching the needle, the needle is movably arranged inside the needle groove, and the needle groove is connected to the air storage chamber;

[0025] A flame sensor is arranged inside the fireproof layer. When the flame sensor senses the flame, it can control the movement of the puncture needle to puncture the airbag.

[0026] In order to further improve the fireproof performance of the cable, a plurality of support blocks are arranged inside the high temperature resistant filler, the support blocks are hollow structures, and the interior of the thermal insulation layer is connected to the air storage cavity through a plurality of air outlet holes.

[0027] In order to improve the connection stability of the connection assembly, a locking member is further included, and the locking member is used to lock the limit rod. The locking member includes:

[0028] A locking ring, wherein the locking ring is threadedly connected to the connecting seat, and the inner side of the locking ring is in contact with an end of the limiting rod away from the positioning rod.

[0029] In order to improve the strength of the fireproof layer, a plurality of support plates are arranged inside the fireproof layer, and a plurality of ventilation holes are opened on the support plates.

[0030] The working principle and beneficial effects of the present invention are:

[0031] 1. In the present invention, the cable is divided into multiple sections by connecting components to prevent the fire from spreading quickly to the entire cable when the cable burns. The connecting components are made of flame-retardant material to avoid the transfer of flames. At the same time, the power transmission of the cable is guaranteed by the plug and socket.

[0032] 2. In the present invention, the flame is sensed by the flame sensor, and the movement of the puncture needle is controlled to puncture the airbag, so that the flame-retardant gas in the airbag escapes and enters the interior of the fireproof layer and the high-temperature resistant filling through the air outlet. The support block is used to create a gap inside the high-temperature resistant filling for the flame-retardant gas to pass through, thereby preventing the fire from spreading further.

[0033] 3. In the present invention, the connector and the connector seat are connected by the cooperation of the positioning rod and the positioning hole, so as to connect the two sections of cables. The positioning rod is limited by the limiting spring, and the limiting rod is locked by the locking ring to ensure the stability of the positioning rod, thereby ensuring the stability of the connection between the connector and the connector seat.

[0034] 4. Therefore, compared with the multi-core aluminum alloy cable in the prior art, the present invention divides the cable into multiple sections and connects the multiple sections of the cable through a connector and a connector. While freely controlling the cable length, when the cable burns, the connecting assembly can block the fire to prevent the fire from spreading to adjacent cables. The flame is sensed by the flame sensor, and the piercing needle is controlled to pierce the airbag. The flame-retardant gas inside the airbag enters the fireproof layer and the interior of the high-temperature resistant filling to prevent the fire from further expanding, and the fireproof performance is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0037] Figure 2 It is a schematic diagram of the planar structure of the present invention as a whole from a side view;

[0038] Figure 3 It is a schematic diagram of the structure of a partial cross-section of the present invention;

[0039] Figure 4 It is a structural schematic diagram of a partial cross-section of the connection assembly of the present invention;

[0040] Figure 5 It is a schematic diagram of the exploded structure of the connection assembly of the present invention;

[0041] Figure 6 It is a schematic diagram of the structure of the needle and the electric cylinder of the present invention;

[0042] Figure 7 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0043] Figure 8 For the present invention Figure 4 A schematic diagram of the local enlarged structure at B in the middle;

[0044] Fig. 9 For the present invention Figure 4 A schematic diagram of the local enlarged structure at C in the middle;

[0045] Fig.10 For the present invention Figure 5 Schematic diagram of the local enlarged structure at point D in the middle.

[0046] In the figure:

[0047] 1. Aluminum alloy conductor; 2. Flame retardant outer sheath; 3. Conductor shield; 4. Insulation layer; 5. Insulation shield; 6. Armor layer; 7. Insulation layer; 8. High temperature resistant filling; 9. Support plate; 10. Support block; 11. High flame retardant tape;

[0048] 101, connector; 102, connector socket; 103, plug; 104, socket;

[0049] 201, positioning rod; 202, limiting rod; 203, limiting plate; 204, limiting spring;

[0050] 301, airbag; 302, fireproof layer; 303, needle; 304, flame sensor; 305, electric cylinder;

[0051] 401. Locking ring. DETAILED DESCRIPTION

[0052] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] like Figures 1 to 10 As shown, this embodiment proposes a flexible multi-core aluminum alloy fireproof cable, including an aluminum alloy conductor 1 and a flame retardant outer sheath 2, wherein the aluminum alloy conductor 1 is provided with a plurality of conductor shields 3, an insulating layer 4, an insulating shield 5, an armor layer 6, a thermal insulation layer 7, a high temperature resistant filling 8, a connecting assembly and a fire extinguishing assembly. Compared with the multi-core aluminum alloy cable in the prior art, the present invention divides the cable into multiple sections, and connects the multiple sections of the cable through a connector 101 and a connector 102. While freely controlling the cable length, when the cable burns, the connecting assembly can block the fire to prevent the fire from spreading to adjacent cables. The flame is sensed by the flame sensor 304, and the needle 303 is controlled to pierce the airbag 301. The flame-retardant gas inside the airbag 301 enters the fireproof layer 302 and the interior of the high temperature resistant filling 8 to prevent the fire from further expanding, and the fireproof performance is good.

[0054] like Figures 1 to 7As shown, the conductor shield 3 is wrapped around the outside of the aluminum alloy conductor 1. The material of the conductor shield 3 is composed of a semi-conductive material with polyethylene as the base material and carbon black. A conductor shield 3 made of a semi-conductive material is added to the surface of the aluminum alloy conductor 1. It has the same potential as the shielded aluminum alloy conductor 1 and is in good contact with the insulating layer 4, thereby avoiding local discharge between the aluminum alloy conductor 1 and the insulating layer 4. The insulating layer 4 is wrapped around the outside of the conductor shield 3 to provide insulation protection between multiple aluminum alloy conductors 1 and multiple conductor shields 3. The insulating shield 5 is wrapped around the outside of the insulating layer 4. There may also be a gap at the contact between the insulating surface and the armor layer 6. When the cable is bent, cracks are easily caused on the insulating surface of the oil-paper cable. These are all factors that cause local discharge. A semi-conductive insulating shield 5 is added to the surface of the insulating layer 4. It has good contact with the shielded insulating layer 4 and is at the same potential as the metal armor layer 6, thereby avoiding local discharge between the insulating layer 4 and the armor layer 6. The armor layer 6 is wrapped around the outside of the insulating shield 5 to provide armor protection for the aluminum alloy conductor 1 and the insulating layer 4, thereby improving the strength of the cable. The thermal insulation layer 7 is located outside the multiple armor layers 6. High flame retardant tapes 11 are provided on the inside and outside of the thermal insulation layer 7. The high temperature resistant filling 8 is provided between the multiple armor layers 6 and the thermal insulation layer 7. The thermal insulation layer 7 can provide a certain degree of temperature barrier inside and outside the cable, and at the same time cooperate with the high flame retardant tape 11 to avoid damage by high temperature and flame, which can effectively prevent personnel from being burned by high-temperature pipelines, prevent the spread of fire, and protect the internal pipelines for a long time, providing sufficient time for the rescue of important information such as data.

[0055] like Figures 3 to 5As shown, the connection assembly is used to connect two sections of aluminum alloy conductors 1. The connection assembly includes a connector 101, a connector seat 102, a plug 103, a socket 104 and a stopper. The connector 101 and the connector seat 102 are respectively arranged on both sides of the flame-retardant outer sheath 2. A plurality of plugs 103 are provided. The plugs 103 and the aluminum alloy conductors 1 correspond one to one. The plugs 103 are arranged inside the connector seat 102. A plurality of sockets 104 are provided. The sockets 104 and the aluminum alloy conductors 1 correspond one to one. The sockets 104 are arranged inside the connector 101. The plugs 103 and the sockets 104 are plugged together. The connector 101 and the connector seat 102 are respectively provided with mounting grooves matching the sockets 104 and the plugs 103. 3 and the socket 104 are respectively located in the corresponding installation grooves, the plug 103 and the socket 104 are both made of metal, and are electrically connected to the aluminum alloy conductor 1. The connector 101 and the connector base 102 are connected, and the plug 103 is inserted into the socket 104, so that the two sections of the aluminum alloy conductor 1 can be electrically connected to transmit power. The limiter is used to limit the connector 101 and the connector base 102 after they are connected. The limiter includes a positioning rod 201, a limiting rod 202 and a limiting plate 203. A plurality of positioning rods 201 are provided, and the positioning rods 201 are arranged on the side of the connector base 102 away from the flame-retardant outer sheath 2. A plurality of positioning holes matching the positioning rods 201 are opened on the connector 101, and a plurality of limiting rods 202 are provided. The limiting rod 202 corresponds to the positioning rod 201 one by one, the limiting rod 202 is slidably arranged on the connector 101, the positioning rod 201 is provided with a limiting groove matching the limiting rod 202, the limiting plate 203 is fixedly sleeved on the outside of the limiting rod 202, a plurality of limiting cavities are provided on the connector 101, the limiting plate 203 is located inside the limiting cavity, a limiting spring 204 is arranged between the limiting plate 203 and the inner wall of the limiting cavity, when the positioning rod 201 is inserted into the positioning hole, the positions of the plug 103 and the socket 104 correspond, the plug 103 is inserted into the inside of the socket 104, so that the two sections of the aluminum alloy conductor 1 are electrically connected, the limiting rod 202 is provided with a chamfer on the side close to the positioning rod 201, and the positioning rod 201 is away from the connector. One side of the socket 102 is also provided with a chamfer, and the end of the initial limit rod 202 is inside the positioning hole. As the positioning rod 201 enters the positioning hole, the limit rod 202 is pushed out of the positioning hole. When the connector 101 and the connector seat 102 are tightly attached, the limit groove moves to a position corresponding to the position of the limit rod 202. Under the action of the limit spring 204, the limit rod 202 is driven into the inside of the limit groove to limit the positioning rod 201, thereby ensuring the stability of the connection between the connector 101 and the connector seat 102. When the connection between the connector 101 and the connector seat 102 needs to be released, the connector seat 102 and the connector 101 are pulled in opposite directions, and the positioning rod 201 can be pulled out from the inside of the positioning hole to disconnect the connection between the plug 103 and the socket 104.

[0056] like Figures 3 to 9As shown, the fire extinguishing assembly is used to extinguish the internal flame of the flame retardant outer sheath 2 in time. The fire extinguishing assembly includes an air bag 301, a fireproof layer 302, a needle 303 and a flame sensor 304. The connector 101 and the connector base 102 are both provided with a gas storage cavity. The air bag 301 is arranged inside the gas storage cavity. The air bag 301 contains a flame retardant gas, such as nitrogen or an inert gas. The fireproof layer 302 is arranged between the thermal insulation layer 7 and the flame retardant outer sheath 2. The fireproof layer 302 is a hollow structure. The fire layer 302 is connected to the gas storage cavity through a plurality of air outlets. The connector 101 and the connector base 102 are both provided with a needle groove matching the needle 303. The needle 303 is movably arranged inside the needle groove. The connector 101 and the connector base 102 are both provided with an electric cylinder 305. The needle 303 is arranged at the output end of the electric cylinder 305. The needle groove is connected to the gas storage cavity. The flame sensor 304 is arranged inside the fireproof layer 302. The flame sensor 304 senses the flame and can control the needle 303 to move. The airbag 301 is punctured dynamically. The flame sensor 304 uses the characteristic that infrared rays are very sensitive to flames and uses a special infrared receiving tube to detect flames. Then, the brightness of the flame is converted into a level signal with high and low changes and input into the central processing unit. The central processing unit transmits an electrical signal to the electric cylinder 305 according to the change of the signal. The electric cylinder 305 drives the needle 303 to move to the inside of the air storage cavity to puncture the airbag 301. The flame-retardant gas in the airbag 301 enters the inside of the fireproof layer 302 through the air outlet to prevent the fire from spreading outward. In order to improve the strength of the fireproof layer 302, a plurality of support plates 9 are arranged inside the fireproof layer 302. A plurality of ventilation holes are opened on the support plate 9. The fireproof layer 302 is supported by the support plate 9 to avoid cable deformation caused by the internal cavity of the fireproof layer 302, and the roundness and strength of the cable are maintained. The flame-retardant gas enters the inside of the fireproof layer 302, and the ventilation holes can make the fireproof layer 302 intercommunication, so that the flame-retardant gas fills the fireproof layer 302.

[0057] like Figures 1 to 3 As shown, in order to further improve the fireproof performance of the cable, a plurality of support blocks 10 are arranged inside the high temperature resistant filling 8. The support block 10 is a hollow structure. The interior of the thermal insulation layer 7 is connected to the gas storage cavity through a plurality of air outlets. The support block 10 is spherical. The plurality of support blocks 10 are in contact with each other. There are a large number of gaps on the surface of the support block 10, so that there are a large number of gaps inside the high temperature resistant filling 8 for the flame retardant gas to pass through. When the cable burns, the flame sensor 304 senses the burning and controls the needle 303 to puncture the airbag 301, so that the flame retardant gas enters the high temperature resistant filling 8 and the fireproof layer 302, and the flame is extinguished in time to avoid further spread of the fire.

[0058] like Figures 1 to 10As shown, in order to improve the connection stability of the connection assembly, a locking member is further included, and the locking member is used to lock the limit rod 202. The locking member includes a locking ring 401, and the locking ring 401 is threadedly connected to the connection seat 102. The inner side of the locking ring 401 contacts the end of the limit rod 202 away from the positioning rod 201. By rotating the locking ring 401, the locking ring 401 can be moved to the side away from the connection seat 102. Initially, the locking ring 401 is on the side close to the connection seat 102. As the locking ring 401 is rotated, the locking ring 401 moves to a position close to the limit rod 202. Prevent the limiting rod 202 from moving out of the limiting groove, thereby ensuring the limiting effect on the positioning rod 201 and preventing the connecting head 101 and the connecting seat 102 from disengaging. When the connection between the connecting head 101 and the connecting seat 102 needs to be disconnected, rotate the locking ring 401 to make the locking ring 401 approach the connecting seat 102, thereby releasing the lock on the limiting rod 202. Pulling the positioning rod 201 can push the limiting rod 202 out of the limiting groove, compressing the limiting spring 204, thereby pulling the positioning rod 201 out of the positioning hole, and releasing the connection between the connecting head 101 and the connecting seat 102.

[0059] The working principle or use process of this flexible multi-core aluminum alloy fireproof cable is:

[0060] When two sections of cables need to be connected, the connector 101 and the connector base 102 are brought close together, the plug 103 is inserted into the inside of the socket 104, and the positioning rod 201 is inserted into the inside of the positioning hole. When the positioning rod 201 is inserted into the inside of the positioning hole, the limiting rod 202 is pushed out of the positioning hole. After the connector 101 and the connector base 102 are tightly attached, the positioning rod 201 enters the inside of the positioning hole. The limiting rod 202 enters the inside of the limiting groove under the action of the limiting spring 204 to limit the positioning rod 201, and then the locking ring 401 is rotated to make the locking ring 401 and the end of the limiting rod 202 contact to lock them.

[0061] When the cable catches fire, the flame sensor 304 senses the generation of flame and controls the electric cylinder 305 to drive the needle 303 to move, puncturing the airbag 301. The flame-retardant gas inside the airbag 301 enters the fireproof layer 302 and the high-temperature resistant filling 8 through the air outlet, preventing the spread of fire. At the same time, the thermal insulation layer 7, the high-temperature resistant filling 8 and the high flame retardant belt 11 can prevent the further spread of fire.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flexible multi-core aluminum alloy fireproof cable, comprising an aluminum alloy conductor (1) and a flame-retardant outer sheath (2), wherein the aluminum alloy conductor (1) is provided in plurality, characterized in that: Also includes: A connecting component, the connecting component is used to connect two sections of the aluminum alloy conductor (1), the connecting component is made of a flame retardant material, and the connecting component comprises: A connecting head (101) and a connecting seat (102), wherein the connecting head (101) and the connecting seat (102) are respectively arranged on two sides of the flame-retardant outer sheath (2); A plug (103), wherein a plurality of the plugs (103) are provided, the plugs (103) and the aluminum alloy conductors (1) correspond one to one, and the plugs (103) are arranged inside the connection seat (102); A socket (104), wherein a plurality of the sockets (104) are provided, the sockets (104) and the aluminum alloy conductors (1) correspond one to one, the sockets (104) are provided inside the connector (101), and the plug (103) and the sockets (104) are plugged and matched; a limiting member, the limiting member being used to limit the position of the connecting head (101) and the connecting seat (102) after they are connected; A fire extinguishing component, the fire extinguishing component being used to promptly extinguish the internal flame of the flame retardant outer sheath (2); A conductor shield (3), the conductor shield (3) being wrapped around the outside of the aluminum alloy conductor (1); An insulating layer (4), the insulating layer (4) being wrapped around the outside of the conductor shield (3); An insulating shield (5), the insulating shield (5) being wrapped around the outside of the insulating layer (4); An armor layer (6), the armor layer (6) being wrapped around the outside of the insulating shield (5); A thermal insulation layer (7), the thermal insulation layer (7) being located outside the plurality of armor layers (6), and a high flame retardant tape (11) being provided on the inner side and the outer side of the thermal insulation layer (7); A high temperature resistant filler (8), the high temperature resistant filler (8) being arranged between the plurality of armor layers (6) and the thermal insulation layer (7); The fire extinguishing assembly comprises: An air bag (301), wherein the connection head (101) and the connection seat (102) are both provided with an air storage cavity, and the air bag (301) is arranged inside the air storage cavity; A fireproof layer (302), the fireproof layer (302) being arranged between the thermal insulation layer (7) and the flame-retardant outer sheath (2), the fireproof layer (302) being a hollow structure, and the fireproof layer (302) being connected to the gas storage cavity via a plurality of air outlet holes; A puncture needle (303), wherein the connector (101) and the connector seat (102) are both provided with a needle groove matching the puncture needle (303), the puncture needle (303) is movably arranged inside the needle groove, and the needle groove is in communication with the air storage chamber; A flame sensor (304), the flame sensor (304) being arranged inside the fireproof layer (302), and the flame sensor (304) sensing a flame can control the needle (303) to move and puncture the airbag (301), so that the flame-retardant gas in the airbag (301) escapes and enters the fireproof layer (302) and the interior of the high-temperature resistant filling (8) through the gas outlet hole; A plurality of support blocks (10) are arranged inside the high temperature resistant filling (8), the support blocks (10) are hollow structures, and the interior of the thermal insulation layer (7) is connected to the air storage cavity via a plurality of air outlet holes.

2. The flexible multi-core aluminum alloy fireproof cable according to claim 1, characterized in that: The limiting member comprises: a positioning rod (201), wherein a plurality of the positioning rods (201) are provided, the positioning rods (201) being provided on a side of the connecting seat (102) away from the flame-retardant outer sheath (2), and the connecting head (101) being provided with a plurality of positioning holes matching the positioning rods (201); A limiting rod (202), wherein a plurality of the limiting rods (202) are provided, the limiting rods (202) and the positioning rods (201) correspond one to one, the limiting rods (202) are slidably provided on the connecting head (101), and the positioning rods (201) are provided with limiting grooves matching the limiting rods (202); A limit plate (203), the limit plate (203) is fixedly sleeved on the outside of the limit rod (202), a plurality of limit cavities are provided on the connecting head (101), the limit plate (203) is located inside the limit cavity, and a limit spring (204) is provided between the limit plate (203) and the inner wall of the limit cavity.

3. The flexible multi-core aluminum alloy fireproof cable according to claim 2, characterized in that: It also includes a locking member, which is used to lock the limiting rod (202), and the locking member includes: A locking ring (401), the locking ring (401) being threadedly connected to the connecting seat (102), the inner side of the locking ring (401) being in contact with an end of the limiting rod (202) away from the positioning rod (201).

Images