A highly flame-retardant fireproof cable made of inorganic materials

Abstract

The present invention relates to the field of cable technology, and proposes an inorganic material highly flame-retardant fireproof cable, comprising an outer sheath and several groups of inner conductors, an inner positioning tube is arranged between the several groups of inner conductors, an inner protective assembly is arranged on the inner outer surface of the outer sheath, an outer positioning structure is arranged between the inner conductors and the inner protective assembly, the outer surfaces of the inner positioning tube and the outer positioning structure are both provided with fire extinguishing structures, and a fireproof component is arranged inside the outer sheath; the fire extinguishing structure comprises an inner card slot opened on the inner side of the inner positioning tube, and an elastic strip is fixedly connected to the outer surface of the inner positioning tube. Through the above technical scheme, the problem that the existing inorganic material highly flame-retardant fireproof cable can cut off the connection between the cable sheath and the fire source at the beginning of the fire, but when the cable is in a burning state, the cable sheath closest to it is still close to the fire source by cutting with a blade, and as the flammable material burns, the sheaths of other cables still have a potential risk of burning.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a highly flame-retardant and fireproof cable made of inorganic materials. Background Art

[0002] High flame retardant inorganic material fireproof cable has high flame retardant effect. The material mainly includes magnesium hydroxide, aluminum hydroxide, inorganic phosphorus and boron flame retardant materials. Currently, most of the existing flame retardants are non-flammable materials or materials that will extinguish themselves after leaving the fire source.

[0003] After searching, the application publication number is CN116525189A, which is a highly flame-retardant fireproof cable made of inorganic materials. This invention predicts the occurrence of fire through the temperature sensing of the bimetallic strip, and can cut off the connection between the cable sheath and the fire source at the beginning of the fire to prevent the fire from spreading.

[0004] However, although the above-mentioned existing inorganic material highly flame retardant fireproof cable can cut off the connection between the cable sheath and the fire source at the beginning of the fire, when the cable is in a burning state, the cable sheath closest to it is still close to the fire source when cut by a blade. As the flammable material burns, the other cable sheaths still have a potential combustion risk. For this reason, we propose an inorganic material highly flame retardant fireproof cable. Summary of the invention

[0005] The present invention proposes an inorganic material highly flame retardant and fireproof cable, which solves the problem mentioned in the background technology that although the existing inorganic material highly flame retardant and fireproof cable can cut off the connection between the cable sheath and the fire source at the beginning of the fire, when the cable is in a burning state, the cable sheath closest to it is still close to the fire source by cutting it with a blade. As the flammable material burns, the sheaths of other cables are still at potential risk of combustion.

[0006] The technical solution of the present invention is as follows:

[0007] An inorganic material highly flame retardant fireproof cable, comprising an outer sheath and a plurality of groups of inner conductors, an inner positioning tube is arranged between the plurality of groups of inner conductors, an inner protective assembly is arranged on the inner outer surface of the outer sheath, an outer positioning structure is arranged between the inner conductors and the inner protective assembly, a fire extinguishing structure is arranged on the outer surfaces of the inner positioning tube and the outer positioning structure, and a fireproof assembly is arranged inside the outer sheath;

[0008] The fire extinguishing structure includes an inner card slot opened on the inner side of the inner positioning tube, an elastic strip is fixedly connected to the outer surface of the inner positioning tube, a card block is fixedly connected to the inner side of the inner positioning tube, a fire extinguishing assembly is arranged inside the inner card slot, a locking groove is opened on the outer surface of the fire extinguishing assembly, a fuse is extended outward from the inside of the fire extinguishing assembly, one end of the fuse is fixedly connected to gunpowder, a partition plate is fixedly connected to the inside of the fire extinguishing assembly, and the inside of the fire extinguishing assembly is filled with dry powder.

[0009] As a further technical solution of the present invention, the inner card slot matches the fire extinguishing assembly, the card block is made of elastic material, the number of the card blocks is three groups and they are made of elastic material, the card block matches the engaging slot, the number of the fire extinguishing assembly and the engaging slot are equal, and the positions of the two correspond one to one.

[0010] As a further technical solution of the present invention, the number of the fuses is several groups, one end of two groups of fuses are respectively connected to the two ends of the gunpowder, and the other end passes through the outer shell of the fire extinguishing component to the outside, and the remaining several groups of fuses are arranged in a ring shape on the outer surface of one side of the gunpowder, the number of the partition plates is several groups and distributed in a ring array, the fire extinguishing component and the partition plates are both foam materials, the dry powder is ammonium phosphate, and there is line contact between the inner positioning tube and the inner wire.

[0011] As a further technical solution of the present invention, the external positioning structure includes an external positioning tube arranged between the two groups of inner wires and the inner protective sleeve, an axial column is arranged at the axis center of the external positioning tube, a positioning portion is arranged between the external positioning tube and the axial column, and the outer surface of the inner wall of the external positioning tube is respectively fixedly connected with longitudinal bars and transverse rings.

[0012] As a further technical solution of the present invention, the axial column is a spiral structure distributed between the axial column and the outer positioning tube, the number of the longitudinal strips is several groups, the longitudinal strips are longitudinally distributed on the outer surface of the inner wall of the outer positioning tube, and several groups of longitudinal strips are distributed in a ring array.

[0013] As a further technical solution of the present invention, the transverse ring is a ring body of several groups of annular structures, the transverse ring, the positioning part and the longitudinal strip are all fixedly connected, a group of external positioning structures are arranged between each two adjacent groups of inner conductors and the inner protective sleeve, and the external positioning tube is in line contact with the inner protective sleeve and the inner conductor.

[0014] As a further technical solution of the present invention, the fireproof component includes an inner slot hole arranged inside the outer sheath, a longitudinal positioning strip is arranged inside the inner slot hole, a transverse positioning ring is fixedly connected to the outer surface of the longitudinal positioning strip, and the interior of the inner slot hole is filled with flame retardant material.

[0015] As a further technical solution of the present invention, the inner slot hole is a hollow cylindrical structure, the longitudinal positioning strips are several groups of ring-shaped strip structures, the transverse positioning ring is used to position the longitudinal positioning strips, the flame retardant material filled inside the inner slot hole is any one or a mixture of sulfate and red phosphorus, and the outer skin of the outer sheath is a flame retardant material.

[0016] As a further technical solution of the present invention, the inner protective cover comprises a No. 1 protective cover and a No. 2 protective cover respectively arranged at the outermost layer and the innermost layer, the inner side of the No. 1 protective cover and the outer side of the No. 2 protective cover are both provided with elastic layers, a mesh layer is provided between the two groups of the elastic layers, and a buffer spring is provided inside the elastic layer.

[0017] As a further technical solution of the present invention, the elastic layer is an elastic insulating material, the number of the buffer springs is several groups and distributed in a ring array, the positions of the buffer springs in the two groups of elastic layers correspond one to one, and the mesh layer is a mesh material woven from nylon material.

[0018] The working principle and beneficial effects of the present invention are:

[0019] 1. In the present invention, through the effect of the fire extinguishing structure, during use, when the flammable materials around the cable burn, the cable will be in a burning state. When the flame burns the cable, the fuse on the fire extinguishing component is ignited, causing the fire extinguishing component to explode. At this time, the cable is flushed open, and the dry powder inside the fire extinguishing component is used to extinguish the fire around the cable. The ignited fire extinguishing components at both ends of the burning area of ​​the cable will extinguish the fire on the outside of the cable. By extinguishing the fire at both ends and the two ends of the burning part of the cable, the fire source can be effectively isolated and extinguished.

[0020] 2. In the present invention, the external positioning structure can provide better support for the cable, strengthen the separation and positioning between the inner conductors inside the cable, thereby maintaining the stability of the inner conductors and enhancing the overall pressure resistance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a structural schematic diagram of the cable of the present invention;

[0023] Figure 2 It is a partial side sectional view of the present invention;

[0024] Figure 3 It is a schematic diagram of the partial structure inside the cable of the present invention;

[0025] Figure 4 It is a schematic diagram of the local structure of the inner positioning tube in the present invention;

[0026] Figure 5 It is a partial structural schematic diagram of the disassembly and installation of the fire extinguishing assembly of the present invention;

[0027] Figure 6 It is a schematic diagram of the partial structure of the fire extinguishing assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of a partial structure of the external positioning structure of the present invention;

[0029] Figure 8 It is a schematic diagram of a partial structure of a fireproof component cut away in the present invention;

[0030] Fig. 9 It is a partial side sectional view of the inner protective assembly in the present invention.

[0031] In the figure: 1. outer sheath; 2. inner conductor; 3. inner positioning tube; 4. outer positioning structure; 41. outer positioning tube; 42. axis column; 43. positioning part; 44. longitudinal strip; 45. transverse ring; 5. fire extinguishing structure; 51. inner slot; 52. elastic strip; 53. block; 54. fire extinguishing assembly; 55. engaging slot; 56. fuse; 57. gunpowder; 58. partition; 6. fireproof assembly; 61. inner slot hole; 62. longitudinal positioning strip; 63. transverse positioning ring; 7. inner protective assembly; 71. No. 1 sheath; 72. No. 2 sheath; 73. elastic layer; 74. mesh layer; 75. buffer spring. DETAILED DESCRIPTION

[0032] 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.

[0033] Example 1

[0034] like Figure 1 to Figure 6 As shown, this embodiment proposes an inorganic material highly flame retardant fireproof cable, comprising an outer sheath 1 and a plurality of groups of inner conductors 2, inner positioning tubes 3 are arranged between the plurality of groups of inner conductors 2, an inner protective assembly 7 is arranged on the inner outer surface of the outer sheath 1, an outer positioning structure 4 is arranged between the inner conductors 2 and the inner protective assembly 7, a fire extinguishing structure 5 is arranged on the outer surfaces of the inner positioning tube 3 and the outer positioning structure 4, and a fireproof component 6 is arranged inside the outer sheath 1;

[0035] The fire extinguishing structure 5 includes an inner card slot 51 opened on the inner side of the inner positioning tube 3, an elastic strip 52 is fixedly connected to the outer surface of the inner positioning tube 3, a card block 53 is fixedly connected to the inner side of the inner positioning tube 3, a fire extinguishing assembly 54 is arranged inside the inner card slot 51, a locking groove 55 is opened on the outer surface of the fire extinguishing assembly 54, a fuse 56 is extended outward from the inside of the fire extinguishing assembly 54, one end of the fuse 56 is fixedly connected to gunpowder 57, a partition plate 58 is fixedly connected to the inside of the fire extinguishing assembly 54, and the inside of the fire extinguishing assembly 54 is filled with dry powder.

[0036] The inner card slot 51 matches the fire extinguishing component 54, the card block 53 is made of elastic material, the number of the card blocks 53 is three groups and they are made of elastic material, the card block 53 matches the card slot 55, the number of the fire extinguishing components 54 and the card slot 55 are equal, and the positions of the two correspond one to one; the number of fuses 56 is several groups, one end of two groups of fuses 56 are respectively connected to the two ends of the gunpowder 57, and the other end passes through the outer shell of the fire extinguishing component 54 to the outside, and the remaining several groups of fuses 56 are annularly arranged on the outer surface of one side of the gunpowder 57, the number of partition plates 58 is several groups and they are distributed in a ring array, the fire extinguishing component 54 and the partition plates 58 are both foam materials, the dry powder is ammonium phosphate, and there is line contact between the inner positioning tube 3 and the inner conductor 2.

[0037] In this embodiment, when a part of the cable is ignited by flammable materials, the fuse 56 will be ignited, driving the gunpowder 57 to explode. The explosion of the gunpowder 57 drives the dry powder in the fire extinguishing component 54 to be sprayed on the burning area, and the fire is extinguished by the dry powder. At the same time, the dry powder can be separated by the partition plate 58, thereby reducing the accumulation of dry powder at the bottom of the fire extinguishing component 54 under the action of gravity. The dry powder extinguishes the fire of the cable, so that the flame of the burned part of the cable can be extinguished, and the external fire source can be prevented from continuously burning the cable, or even burning other parts of the cable. The structural setting of the fuse 56 extending outward at multiple angles can make the ignition of the fuse 56 more sensitive, and the fire can be extinguished when the cable is ignited by flammable materials, effectively controlling the fire and reducing the burning loss of the cable. At the same time, the characteristics of the fireproof cable itself can maintain power supply for a certain period of time during the combustion process, and with the application of the fire extinguishing structure 5, the service life of the cable can be further extended.

[0038] During use, when the flammable materials around the cable burn, the cable will be in a burning state. When the flame burns the cable, the fuse 56 on the fire extinguishing component 54 will be ignited, causing the fire extinguishing component 54 to explode. At this time, the cable is flushed open, and the dry powder inside the fire extinguishing component 54 will extinguish the fire around the cable. The ignited fire extinguishing components 54 at both ends of the burning area of ​​the cable will extinguish the fire on the outside of the cable. By extinguishing the fire at both ends and at both ends of the burning part of the cable, the fire source can be effectively isolated and extinguished.

[0039] Example 2

[0040] like Figure 7 As shown, on the basis of Example 1, it is proposed that the external positioning structure 4 includes an external positioning tube 41 arranged between the two groups of inner wires 2 and the inner protective sleeve 7, an axial column 42 is arranged at the axis center of the external positioning tube 41, a positioning portion 43 is arranged between the external positioning tube 41 and the axial column 42, and the outer surface of the inner wall of the external positioning tube 41 is respectively fixedly connected with a longitudinal bar 44 and a transverse ring 45.

[0041] The central axis 42 is a spiral structure distributed between the central axis 42 and the outer positioning tube 41. The number of longitudinal strips 44 is several groups. The longitudinal strips 44 are longitudinally distributed on the outer surface of the inner wall of the outer positioning tube 41, and several groups of longitudinal strips 44 are distributed in a ring array. The transverse ring 45 is a ring body of several groups of ring structures. The transverse ring 45, the positioning part 43 and the longitudinal strips 44 are all fixedly connected. A group of external positioning structures 4 is arranged between each two adjacent groups of inner conductors 2 and the inner protective sleeve 7. The outer positioning tube 41 is in line contact with the inner protective sleeve 7 and the inner conductor 2.

[0042] In this embodiment, during use, the positioning portion 43 cooperates with the central column 42 to push the outer positioning tube 41 to maintain the stability of the outer positioning tube 41. At the same time, the stability of the outer positioning tube 41 can be strengthened by the longitudinal strips 44 and the transverse rings 45. When the cable is subjected to external force, the balance between the inner conductor 2 and the inner protective cover 7 can be effectively maintained, thereby reducing the pressure on the internal circuit of the inner conductor 2.

[0043] The supporting effect of the cable can be improved, and the separation and positioning between the inner conductors 2 inside the cable can be strengthened, so as to maintain the stability of the inner conductors 2 and enhance the overall pressure resistance of the cable.

[0044] Example 3

[0045] like Figure 8 As shown, on the basis of Example 2, it is further proposed that the fireproof component 6 includes an inner slot hole 61 arranged inside the outer sheath 1, a longitudinal positioning strip 62 is arranged inside the inner slot hole 61, a transverse positioning ring 63 is fixedly connected to the outer surface of the longitudinal positioning strip 62, and the interior of the inner slot hole 61 is filled with flame retardant material; the inner slot hole 61 is a hollow columnar structure, the longitudinal positioning strip 62 is a plurality of groups of strip structures distributed in an annular shape, the transverse positioning ring 63 is used to position the longitudinal positioning strip 62, the flame retardant material filled inside the inner slot hole 61 is any one of sulfate and red phosphorus or a mixture of two, and the outer skin of the outer sheath 1 is flame retardant material.

[0046] In this embodiment, during the burning of the cable, the flame retardant material can be evenly distributed inside the inner groove hole 61 through the transverse positioning ring 63, the transverse positioning ring 63 and the flame retardant material, so that the flame retardant properties of various areas of the outer sheath 1 can be kept consistent. When a local leakage point occurs on the outer surface of the outer sheath 1, the locally flowing flame retardant material can still perform flame retardancy. At the same time, the outer sheath 1 itself is also made of flame retardant material, and the flame retardant effect is better.

[0047] When in use, the flame retardant performance of the outer sheath 1 can be enhanced, so that the flame retardant performance of each area inside the outer sheath 1 tends to be consistent, and the flame retardant performance is more stable.

[0048] Example 4

[0049] like Fig. 9 As shown, on the basis of Example 3, it is further proposed that the inner sheath kit 7 includes a No. 1 sheath 71 and a No. 2 sheath 72 which are respectively arranged on the outermost layer and the innermost layer, the inner side of the No. 1 sheath 71 and the outer side of the No. 2 sheath 72 are both provided with elastic layers 73, a mesh layer 74 is provided between the two groups of elastic layers 73, and buffer springs 75 are provided inside the elastic layers 73; the elastic layers 73 are elastic insulating materials, the number of buffer springs 75 is several groups and distributed in a ring array, the positions of the buffer springs 75 in the two groups of elastic layers 73 correspond one to one, and the mesh layer 74 is a mesh material woven from nylon material.

[0050] In this embodiment, the elastic layer 73 can further strengthen the buffering protection of the inner conductor 2. At the same time, the buffer spring 75 can cooperate with the external positioning structure 4 to reduce the force on the inner conductor 2. At the same time, the mesh layer 74 can enhance the overall toughness of the cable. In combination with the buffer spring 75 and the elastic layer 73, the resilience and bending elasticity of the cable can be enhanced after the cable is bent and then straightened.

[0051] When in use, the bending elasticity of the cable itself can be enhanced, and the external positioning structure 4 can be used to further increase the overall pressure resistance of the cable, promote the anti-torsion performance of the cable itself, and enhance the resilience after torsion.

[0052] It should be noted that A is dry powder.

[0053] In summary, the working principle and use process of the present invention are as follows:

[0054] When in use, when part of the cable is ignited by flammable materials, the fuse 56 will be ignited, driving the gunpowder 57 to explode. The explosion of the gunpowder 57 drives the dry powder in the fire extinguishing assembly 54 to be sprayed on the burning area, and the fire is extinguished by the dry powder. At the same time, the dry powder can be separated by the partition plate 58, thereby reducing the accumulation of dry powder at the bottom of the fire extinguishing assembly 54 under the action of gravity. The fire extinguishing of the cable by the dry powder can extinguish the flame of the burned part of the cable, prevent the continuous burning of the cable by external fire sources, and even burn other parts of the cable. The structural setting of the fuse 56 extending outward at multiple angles can make the ignition of the fuse 56 more sensitive, and extinguish the fire when the cable is ignited by flammable materials, effectively control the fire, and reduce the burning loss of the cable. At the same time, the characteristics of the fireproof cable itself can maintain power supply for a certain period of time during the combustion process, and with the application of the fire extinguishing structure 5, the service life of the cable can be further extended.

[0055] During use, the positioning portion 43 cooperates with the shaft column 42 to push the outer positioning tube 41 to maintain the stability of the outer positioning tube 41. At the same time, the longitudinal strip 44 and the transverse ring 45 can strengthen the stability of the outer positioning tube 41. When the cable is subjected to external force, the balance between the inner conductor 2 and the inner sheath 7 can be effectively maintained, reducing the pressure on the internal circuit of the inner conductor 2.

[0056] At the same time, during the burning process of the cable, the flame retardant material can be evenly distributed inside the inner slot 61 through the horizontal positioning ring 63, the horizontal positioning ring 63 and the flame retardant material, so that the flame retardant performance of each area of ​​the outer sheath 1 can be kept consistent. When a local leak occurs on the outer surface of the outer sheath 1, the locally flowing flame retardant material can still perform flame retardancy. At the same time, the outer sheath 1 itself is also made of flame retardant material, and the flame retardant effect is better.

[0057] During use, the elastic layer 73 can further strengthen the buffering protection of the inner conductor 2, and the buffer spring 75 can cooperate with the external positioning structure 4 to reduce the force on the inner conductor 2. At the same time, the mesh layer 74 can enhance the overall toughness of the cable. In combination with the buffer spring 75 and the elastic layer 73, the resilience and bending elasticity of the cable can be enhanced after the cable is bent and then straightened.

[0058] 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. An inorganic material highly flame retardant and fireproof cable, characterized in that: The invention comprises an outer sheath (1) and a plurality of groups of inner conductors (2), an inner positioning tube (3) being arranged between the plurality of groups of inner conductors (2), an inner protective assembly (7) being arranged on the inner outer surface of the outer sheath (1), an outer positioning structure (4) being arranged between the inner conductors (2) and the inner protective assembly (7), a fire extinguishing structure (5) being arranged on the outer surfaces of the inner positioning tube (3) and the outer positioning structure (4), and a fireproofing assembly (6) being arranged inside the outer sheath (1); The fire extinguishing structure (5) comprises an inner slot (51) provided on the inner side of the inner positioning tube (3); an elastic strip (52) is fixedly connected to the outer surface of the inner positioning tube (3); a clamping block (53) is fixedly connected to the inner side of the inner positioning tube (3); a fire extinguishing component (54) is arranged inside the inner slot (51); a locking groove (55) is provided on the outer surface of the fire extinguishing component (54); a fuse (56) is provided inside the fire extinguishing component (54) extending outward; one end of the fuse (56) is fixedly connected to gunpowder (57); a partition plate (58) is fixedly connected to the inside of the fire extinguishing component (54); and the inside of the fire extinguishing component (54) is filled with dry powder; The inner card slot (51) matches the fire extinguishing assembly (54), the card block (53) is made of elastic material, the card blocks (53) are in three groups and are made of elastic material, the card blocks (53) match the engaging slot (55), the fire extinguishing assembly (54) and the engaging slot (55) are in equal numbers, and their positions correspond one to one; The number of the fuses (56) is several groups, wherein one end of two groups of fuses (56) is respectively connected to the two ends of the gunpowder (57), and the other end penetrates the outer shell of the fire extinguishing component (54) to the outside, and the remaining groups of fuses (56) are arranged in a ring shape on the outer surface of one side of the gunpowder (57). The number of the partition plates (58) is several groups and is distributed in a ring array. The fire extinguishing component (54) and the partition plates (58) are both made of foam materials, and the dry powder is ammonium phosphate. The inner positioning tube (3) and the inner conductor (2) are in line contact.

2. The inorganic material highly flame retardant and fireproof cable according to claim 1, characterized in that: The external positioning structure (4) comprises an external positioning tube (41) arranged between the two groups of internal conductors (2) and the internal protective sleeve (7); an axial column (42) is arranged at the axis of the external positioning tube (41); a positioning portion (43) is arranged between the external positioning tube (41) and the axial column (42); and longitudinal strips (44) and transverse rings (45) are respectively fixedly connected to the outer surface of the inner wall of the external positioning tube (41).

3. The inorganic material highly flame retardant and fireproof cable according to claim 2, characterized in that: The axial column (42) is a spiral structure distributed between the axial column (42) and the outer positioning tube (41), the longitudinal strips (44) are in a plurality of groups, the longitudinal strips (44) are longitudinally distributed on the outer surface of the inner wall of the outer positioning tube (41), and the plurality of groups of longitudinal strips (44) are distributed in a ring array.

4. The inorganic material highly flame retardant and fireproof cable according to claim 3, characterized in that: The transverse ring (45) is a ring body of a plurality of groups of annular structures. The transverse ring (45), the positioning portion (43) and the longitudinal strip (44) are all fixedly connected. A group of external positioning structures (4) is provided between each two adjacent groups of inner conductors (2) and the inner protective sleeve (7). The external positioning tube (41) is in line contact with the inner protective sleeve (7) and the inner conductor (2).

5. The inorganic material highly flame retardant and fireproof cable according to claim 1, characterized in that: The fireproof component (6) comprises an inner slot hole (61) arranged inside the outer sheath (1), a longitudinal positioning strip (62) is arranged inside the inner slot hole (61), a transverse positioning ring (63) is fixedly connected to the outer surface of the longitudinal positioning strip (62), and the interior of the inner slot hole (61) is filled with a flame retardant material.

6. The inorganic material highly flame retardant and fireproof cable according to claim 5, characterized in that: The inner slot hole (61) is a hollow columnar structure, the longitudinal positioning strips (62) are a plurality of groups of ring-shaped strip structures, the transverse positioning ring (63) is used to locate the position of the longitudinal positioning strip (62), the flame retardant material filled inside the inner slot hole (61) is any one of sulfate and red phosphorus or a mixture of the two, and the outer skin of the outer sheath (1) is a flame retardant material.

7. The inorganic material highly flame retardant and fireproof cable according to claim 1, characterized in that: The inner protective sleeve (7) comprises a No. 1 protective sleeve (71) and a No. 2 protective sleeve (72) which are respectively arranged at the outermost layer and the innermost layer, an elastic layer (73) is arranged on the inner side of the No. 1 protective sleeve (71) and the outer side of the No. 2 protective sleeve (72), a mesh layer (74) is arranged between the two sets of elastic layers (73), and a buffer spring (75) is arranged inside the elastic layer (73).

8. The inorganic material highly flame retardant and fireproof cable according to claim 7, characterized in that: The elastic layer (73) is an elastic insulating material, the buffer springs (75) are provided in a plurality of groups and are distributed in a ring array, the positions of the buffer springs (75) in the two groups of the elastic layers (73) correspond one to one, and the mesh layer (74) is a mesh material woven from nylon material.

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