Flexible mineral insulated fireproof cable

Abstract

The invention relates to a flexible mineral insulation fireproof cable, and relates to the technical field of cables, the flexible mineral insulation fireproof cable comprises a plurality of copper wire conductors, the outer sides of the copper wire conductors are sleeved with ceramic silicone rubber insulation layers, and the ceramic silicone rubber insulation layers can provide insulation protection for the copper wire conductors; the modified polyolefin inner waterproof layer and the polytetrafluoroethylene outer waterproof layer can form a double-layer waterproof structure to improve the waterproof capability of the cable, the aluminum foil strip electromagnetic shielding layer can change an external electromagnetic field to generate interference on the copper wire conductor, and the ceramic silicone rubber fireproof layer can form a side fireproof layer to improve the fireproof performance of the cable. The first supporting half ring and the second supporting half ring on the outer side of the cable can support the cable, a rubber outer layer sheath of the cable is prevented from being abraded and scratched, the moving balls in the ball grooves can roll along the bottom face when the cable moves, the cable can move conveniently, the structure is simple, and operation is convenient.

Description

Technical Field

[0001] This invention belongs to the field of cable technology, and particularly relates to a flexible mineral-insulated fireproof cable. Background Technology

[0002] Mineral insulated cables are cables in which a copper sheath encases a copper conductor core, and magnesium oxide powder is used as an inorganic insulating material to isolate the conductor from the sheath. The outermost protective sheath can be selected as needed. They are commonly known as MICC or MI cables. There is a similar type of cable that uses metal instead of copper to encase the core and insulation material, and it is called a mineral insulated metal sheath cable.

[0003] However, mineral-insulated cables are inconvenient to drag during installation due to their weight. During the dragging process, the cable will rub against the ground, which will easily cause wear on the outer protective sheath of the cable, posing a risk of leakage and creating a safety hazard. Therefore, we have proposed a flexible mineral-insulated fireproof cable. Summary of the Invention

[0004] This invention provides a flexible mineral-insulated fire-resistant cable to solve existing problems.

[0005] This invention provides a flexible mineral-insulated fire-resistant cable, comprising: Multiple copper wire conductors are provided, with a ceramicized silicone rubber insulation layer covering the outer side of each conductor. A modified polyolefin inner waterproof layer is then covered around the outer side of the ceramicized silicone rubber insulation layer. An aluminum foil electromagnetic shielding layer is fitted around the sidewall of the modified polyolefin inner waterproof layer, and a polytetrafluoroethylene (PTFE) outer waterproof layer is fitted around the sidewall of the PTFE outer waterproof layer. A ceramicized silicone rubber fireproof layer is fitted around the sidewall of the ceramicized silicone rubber fireproof layer, and a rubber outer sheath is fitted around the sidewall of the rubber outer sheath. A first supporting semi-ring is located on the right side of the rubber outer sheath. The two ends of the semi-ring are provided with threaded grooves. The left side of the rubber outer sheath is provided with a second supporting semi-ring, and the two ends of the second supporting semi-ring are provided with connecting holes. The bottom surface of the connecting hole is provided with an operating hole, and a fixing bolt is slidably installed inside the operating hole. The fixing bolt is threadedly connected to the threaded groove. The side wall of the first supporting semi-ring and the rubber support plate is provided with multiple ball grooves. The ball grooves are slidably installed with movable balls. The outer side of the modified polyolefin inner waterproof layer is provided with a first buffer device, and the inside of the ceramicized silicone rubber insulation layer is provided with a second buffer device.

[0006] The ceramicized silicone rubber insulation layer provides insulation protection for the copper conductor. The modified polyolefin inner waterproof layer and the polytetrafluoroethylene outer waterproof layer form a double-layer waterproof structure, improving the cable's waterproof capability. The aluminum foil electromagnetic shielding layer prevents external electromagnetic fields from interfering with the copper conductor. The ceramicized silicone rubber fireproof layer forms a fireproof layer on one side, improving the cable's fire resistance. When moving the cable, the first and second support semi-rings on the outer side of the cable support the cable, preventing wear and scratches on the cable's rubber outer sheath. When the cable moves, the moving balls inside the ball groove roll along the bottom surface, facilitating cable movement. The structure is simple and easy to operate.

[0007] Preferably, the first buffer device includes: A rubber buffer layer is disposed inside the aluminum foil electromagnetic shielding layer and sleeved on the sidewall of the ceramicized silicone rubber insulation layer. The rubber buffer layer has an inner buffer groove with multiple foamed silicone buffer pillars evenly distributed within it. When the cable is dragged, the foamed silicone buffer pillars inside the rubber buffer layer, located between the modified polyolefin inner waterproof layer and the aluminum foil electromagnetic shielding layer, act as a buffer, mitigating vibrations and protecting the modified polyolefin inner waterproof layer, the aluminum foil electromagnetic shielding layer, and the copper conductor.

[0008] Preferably, the second buffer device includes: Multiple rubber buffer rings are disposed inside the ceramicized silicone rubber insulation layer. Rubber support plates are provided on both sides of the copper conductor, and the rubber support plates are fixedly installed on the side walls of the rubber buffer rings. A rubber support strip is fixedly installed at one end of each rubber support plate. The rubber buffer rings, rubber support plates, and rubber support strips are distributed in segments inside the ceramicized silicone rubber insulation layer. Through the cooperation of the rubber buffer rings, rubber support plates, and rubber support strips, the copper conductors are placed in the compartments formed by the rubber buffer rings, rubber support plates, and rubber support strips, so that multiple copper conductors do not interfere with each other and can support the ceramicized silicone rubber insulation layer, preventing the ceramicized silicone rubber insulation layer from squeezing the copper conductors, thereby protecting the copper conductors and further mitigating the impact force. The segmented design of the rubber buffer rings, rubber support plates, and rubber support strips does not affect the flexibility of the cable, and the structure is simple.

[0009] Preferably, the copper wire conductor is made of multiple strands of copper wire bonded together, and a glass fiber filling core is provided in the middle of the copper wire conductor; compared with a single strand of copper wire, the copper wire conductor made of multiple strands of copper wire bonded together is beneficial to improving the flexibility of the copper wire conductor. After the multiple strands of copper wire are spirally twisted together, each copper wire can be relatively slightly displaced, dispersing the concentrated stress to each copper wire, greatly reducing bending resistance, improving bendability, and facilitating use.

[0010] Preferably, the sidewalls of the copper wire conductor are coated with a nano-anti-corrosion coating; the nano-anti-corrosion coating can enhance the corrosion resistance of the copper wire conductor, prevent oxidation loss during long-term use, and ensure stable conductivity, thus extending its service life.

[0011] Preferably, a glass fiber filling layer is provided on one side of the copper wire conductor, and the glass fiber filling layer is evenly distributed inside the support compartment formed by the rubber support plate; by providing the glass fiber filling layer, the glass fiber filling layer can fix the copper wire conductor inside the compartment formed by the rubber support plate, reducing the possibility of displacement of the copper wire conductor and improving the stability of use.

[0012] Preferably, the foamed silicone buffer column has multiple honeycomb vents inside; by setting the honeycomb vents, the honeycomb structure can improve the pressure resistance and buffering performance of the foamed silicone buffer column, absorb the mechanical impact force during installation or use, and, together with the rubber buffer layer, can effectively protect the copper wire conductor and the ceramicized silicone rubber insulation layer inside the rubber buffer layer, and can also improve the cable flexibility and facilitate use.

[0013] Preferably, the outer side of the foamed silicone buffer column is provided with glass fiber filling cotton, and the glass fiber filling cotton is evenly distributed inside the buffer inner groove; by providing glass fiber filling cotton, the glass fiber filling cotton can support and fix the foamed silicone buffer column, fix the foamed silicone buffer column inside the buffer inner groove, avoid the foamed silicone buffer column from shifting, affect the buffering effect of the foamed silicone buffer column, and improve the stability of use.

[0014] Preferably, the sidewalls of the rubber outer sheath are coated with a fire-retardant paint coating; by setting the fire-retardant paint coating coating, the fire-retardant paint coating coating applied to the outside of the rubber buffer layer can form a fire-retardant outer layer, improving the overall fire resistance of the cable and enhancing its safety in use.

[0015] Beneficial effects:

[0016] 1. The ceramicized silicone rubber insulation layer provides insulation protection for the copper conductor. The modified polyolefin inner waterproof layer and the polytetrafluoroethylene outer waterproof layer form a double-layer waterproof structure, improving the cable's waterproof capability. The aluminum foil electromagnetic shielding layer prevents external electromagnetic fields from interfering with the copper conductor. The ceramicized silicone rubber fireproof layer forms a fireproof layer on one side, improving the cable's fire resistance. When moving the cable, the first and second support semi-rings on the outer side of the cable support the cable, preventing wear and scratches on the cable's rubber outer sheath. When the cable moves, the moving balls inside the ball groove roll along the bottom surface, facilitating cable movement. The structure is simple and easy to operate.

[0017] 2. When dragging the cable, the foamed silicone buffer column inside the rubber buffer layer between the modified polyolefin inner waterproof layer and the aluminum foil electromagnetic shielding layer can play a buffering role, reduce the vibration generated when dragging the cable, and protect the modified polyolefin inner waterproof layer, the aluminum foil electromagnetic shielding layer, and the copper wire conductor.

[0018] 3. By using rubber buffer rings, rubber support plates, and rubber support strips, the copper conductors are positioned within the compartments formed by these components. This prevents interference between multiple copper conductors and supports the ceramicized silicone rubber insulation layer, preventing it from compressing the copper conductors and thus protecting them from impact. The segmented design of the rubber buffer rings, rubber support plates, and rubber support strips does not affect the cable's flexibility and results in a simple structure.

[0019] The above description is merely an overview of the technical solutions of the embodiments of the present invention. In order to better understand the technical means of the embodiments of the present invention and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the side structure of the present invention. Figure 1 ; Figure 3 for Figure 2 An enlarged schematic diagram of section A in the middle; Figure 4 This is a schematic cross-sectional view of the side structure of the present invention. Figure 2 ; Figure 5 for Figure 4 An enlarged schematic diagram of section B in the middle; Figure 6 This is a schematic cross-sectional view of the side structure of the present invention. Figure 3 ; Figure 7 for Figure 6 Enlarged structural diagram of section C; Figure 8 This is a magnified, disassembled schematic diagram of the copper wire conductor of the present invention; Figure 9 This is an enlarged schematic diagram of the foamed silicone buffer column of the present invention; Figure 10 This is an enlarged schematic diagram of the second buffer mechanism of the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Copper wire conductor; 2. Ceramicized silicone rubber insulation layer; 3. Modified polyolefin inner waterproof layer; 4. Aluminum foil strip electromagnetic shielding layer; 5. Polytetrafluoroethylene outer waterproof layer; 6. Ceramicized silicone rubber fireproof layer; 7. Rubber outer sheath; 8. First support half-ring; 9. Threaded groove; 10. Second support half-ring; 11. Connecting hole; 12. Fixing bolt; 13. Ball groove; 14. Moving ball; 15. Rubber buffer layer; 16. Buffer inner groove; 17. Foamed silicone buffer column; 18. Rubber buffer ring; 19. Rubber support plate; 20. Glass fiber filling layer; 21. Glass fiber filling core; 22. Nano anti-corrosion coating; 23. Honeycomb vents; 24. Glass fiber filling cotton; 25. Fireproof coating outer layer; 26. Operating hole; 27. Rubber support strip. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this invention are intended to cover non-exclusive inclusion.

[0025] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the present invention. For example, in the description of the present invention, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" of a mechanical structure can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0029] This invention provides, for example Figure 1 - Figure 10 The flexible mineral-insulated fire-resistant cable shown includes: Multiple copper wire conductors 1 are provided. A ceramicized silicone rubber insulation layer 2 is sleeved on the outer side of each copper wire conductor 1. A modified polyolefin inner waterproof layer 3 is sleeved on the outer side of the ceramicized silicone rubber insulation layer 2. An aluminum foil strip electromagnetic shielding layer 4 is sleeved on the side wall of the modified polyolefin inner waterproof layer 3. A polytetrafluoroethylene (PTFE) outer waterproof layer 5 is sleeved on the side wall of the PTFE outer waterproof layer 5. A ceramicized silicone rubber fireproof layer 6 is sleeved on the side wall of the ceramicized silicone rubber fireproof layer 6. A rubber outer sheath 7 is sleeved on the right side of the rubber outer sheath 7. A first supporting semi-ring 8 is provided on the right side of the first supporting semi-ring 8, and both ends of the first supporting semi-ring 8 are open. The rubber outer sheath 7 is provided with a threaded groove 9. A second support half-ring 10 is provided on the left side of the rubber outer sheath 7. The two ends of the second support half-ring 10 are provided with connecting holes 11. The bottom surface of the connecting holes 11 is provided with an operating hole 26. A fixing bolt 12 is slidably installed inside the operating hole 26. The fixing bolt 12 is threadedly connected to the threaded groove 9. The side walls of the first support half-ring 8 and the rubber support plate 19 are provided with multiple ball grooves 13. The ball grooves 13 are swirlingly installed with movable balls 14. A first buffer device is provided on the outside of the modified polyolefin inner waterproof layer 3. A second buffer device is provided inside the ceramicized silicone rubber insulation layer 2.

[0030] Furthermore, the ceramicized silicone rubber insulation layer 2 provides insulation protection for the copper wire conductor 1, the modified polyolefin inner waterproof layer 3 and the polytetrafluoroethylene outer waterproof layer 5 form a double-layer waterproof structure, improving the cable's waterproof capability, while the aluminum foil strip electromagnetic shielding layer 4 prevents external electromagnetic fields from interfering with the copper wire conductor 1, and the ceramicized silicone rubber fireproof layer 6 forms a fireproof layer on one side, improving the cable's fire resistance. When moving the cable, the first support semi-ring 8 and the second support semi-ring 10 on the outer side of the cable support the cable, preventing wear and scratches on the cable's rubber outer sheath 7. When the cable moves, the moving balls 14 inside the ball groove 13 roll along the bottom surface, facilitating the cable's movement. The structure is simple and easy to operate.

[0031] In this embodiment, the first buffer device includes: A rubber buffer layer 15 is disposed inside the aluminum foil strip electromagnetic shielding layer 4 and is sleeved on the side wall of the ceramicized silicone rubber insulating layer 2. A buffer inner groove 16 is provided inside the rubber buffer layer 15, and a plurality of foamed silicone buffer pillars 17 are provided inside the buffer inner groove 16. The foamed silicone buffer pillars 17 are evenly distributed inside the buffer inner groove 16.

[0032] Furthermore, when the cable is dragged, the foamed silicone buffer column 17 inside the rubber buffer layer 15 between the modified polyolefin inner waterproof layer 3 and the aluminum foil strip electromagnetic shielding layer 4 can play a buffering role, reducing the vibration generated when the cable is dragged and protecting the modified polyolefin inner waterproof layer 3, the aluminum foil strip electromagnetic shielding layer 4, and the copper wire conductor 1.

[0033] In this embodiment, the second buffer device includes: Multiple rubber buffer rings 18 are disposed inside the ceramicized silicone rubber insulation layer 2. Rubber support plates 19 are provided on both sides of the copper wire conductor 1, and the rubber support plates 19 are fixedly installed on the side wall of the rubber buffer rings 18. A rubber support strip 27 is fixedly installed on one end of the rubber support plate 19. The rubber buffer rings 18, rubber support plates 19, and rubber support strips 27 are distributed in segments inside the ceramicized silicone rubber insulation layer 2.

[0034] Furthermore, by setting up the rubber buffer ring 18, rubber support plate 19, and rubber support strip 27, the copper wire conductor 1 will be placed in the compartment formed by the rubber buffer ring 18, rubber support plate 19, and rubber support strip 27, so that multiple copper wire conductors 1 will not interfere with each other, and can support the ceramicized silicon rubber insulation layer 2, so that the ceramicized silicon rubber insulation layer 2 will not squeeze the copper wire conductor 1, thereby protecting the copper wire conductor 1 and further mitigating the impact force. The segmented design of the rubber buffer ring 18, rubber support plate 19, and rubber support strip 27 will not affect the flexibility of the cable, and the structure is simple.

[0035] In this embodiment, the copper wire conductor 1 is made of multiple strands of copper wire bonded together, and a glass fiber filling core 21 is provided in the middle of the copper wire conductor 1.

[0036] In this embodiment, the copper wire conductor 1, which is made of multiple strands of copper wire bonded together, is more flexible than a single strand of copper wire. After the multiple strands of copper wire are spirally twisted together, each copper wire can be relatively slightly displaced, which disperses the concentrated stress to each strand of copper wire, greatly reduces bending resistance, improves bendability, and makes it convenient to use.

[0037] Furthermore, the sidewalls of the copper wire conductor 1 are coated with a nano-anti-corrosion coating 22.

[0038] In this embodiment, the nano-anti-corrosion coating 22 can enhance the corrosion resistance of the copper wire conductor 1, prevent oxidation loss of the copper wire conductor 1 during long-term use, and at the same time ensure stable conductivity and extend service life.

[0039] Furthermore, a glass fiber filling layer 20 is provided on one side of the copper wire conductor 1, and the glass fiber filling layer 20 is evenly distributed inside the support compartment formed by the rubber support plate 19.

[0040] In this embodiment, by providing a glass fiber filling layer 20, the glass fiber filling layer 20 can fix the copper wire conductor 1 inside the compartment formed by the rubber support plate 19, reducing the possibility of displacement of the copper wire conductor 1 and improving the stability of use.

[0041] Furthermore, the interior of the foamed silicone buffer column 17 is provided with multiple honeycomb ventilation holes 23.

[0042] In this embodiment, by setting honeycomb vents 23, the honeycomb structure of the honeycomb vents 23 can improve the pressure resistance and buffering performance of the foamed silicone buffer column 17, absorb the mechanical impact force during installation or use, and, together with the rubber buffer layer 15, can effectively protect the copper wire conductor 1 and the ceramicized silicone rubber insulation layer 2 inside the rubber buffer layer 15, and can also improve the cable flexibility and facilitate use.

[0043] Furthermore, the outer side of the foamed silicone buffer column 17 is provided with glass fiber filling cotton 24, and the glass fiber filling cotton 24 is evenly distributed inside the buffer inner groove 16.

[0044] In this embodiment, by providing glass fiber filling cotton 24, the glass fiber filling cotton 24 can support and fix the foamed silicone buffer column 17, fix the foamed silicone buffer column 17 inside the buffer inner groove 16, avoid the foamed silicone buffer column 17 from shifting, affecting the buffering effect of the foamed silicone buffer column 17, and improve the stability of use.

[0045] Furthermore, the sidewalls of the rubber outer sheath 7 are coated with a fire-retardant coating 25.

[0046] In this embodiment, by setting a fire-retardant coating spray outer layer 25, a fire-retardant outer layer can be formed by spraying the fire-retardant coating spray outer layer 25 on the outside of the rubber buffer layer 15, thereby improving the overall fire resistance of the cable and enhancing its safety in use.

[0047] Working principle: The ceramicized silicone rubber insulation layer 2 provides insulation protection for the copper conductor 1. The modified polyolefin inner waterproof layer 3 and the polytetrafluoroethylene outer waterproof layer 5 form a double-layer waterproof structure, improving the cable's waterproof capability. The aluminum foil electromagnetic shielding layer 4 prevents external electromagnetic fields from interfering with the copper conductor 1. The ceramicized silicone rubber fireproof layer 6 forms a fireproof layer on one side, improving the cable's fire resistance. When moving the cable, the first support semi-ring 8 and the second support semi-ring 10 on the outer side of the cable support the cable, preventing wear and scratches on the cable's rubber outer sheath 7. When the cable moves, the moving balls 14 inside the ball groove 13 roll along the bottom surface, facilitating cable movement. When dragging the cable, the rubber buffer set between the modified polyolefin inner waterproof layer 3 and the aluminum foil electromagnetic shielding layer 4... The foamed silicone buffer pillars 17 inside the punch layer 15 can act as a buffer to reduce the vibration generated when the cable is dragged, and protect the modified polyolefin inner waterproof layer 3, the aluminum foil electromagnetic shielding layer 4, and the copper wire conductor 1. With the cooperation of the rubber buffer ring 18, rubber support plate 19, and rubber support strip 27, the copper wire conductor 1 will be in the compartment formed by the rubber buffer ring 18, rubber support plate 19, and rubber support strip 27, so that multiple copper wire conductors 1 will not interfere with each other, and can support the ceramicized silicone rubber insulation layer 2, so that the ceramicized silicone rubber insulation layer 2 will not squeeze the copper wire conductor 1, thereby protecting the copper wire conductor 1 and further reducing the impact force. The segmented design of the rubber buffer ring 18, rubber support plate 19, and rubber support strip 27 will not affect the flexibility of the cable.

[0048] Compared to single-strand copper wire, the copper conductor 1, made of multiple strands of copper wire bonded together, is more flexible. After the multiple strands of copper wire are spirally twisted, each copper wire can move slightly, dispersing the concentrated stress to each strand, greatly reducing bending resistance and improving bendability. Furthermore, by setting a glass fiber filling layer 20, the copper conductor 1 can be fixed inside the compartment formed by the rubber support plate 19, reducing the possibility of displacement of the copper conductor 1. The honeycomb structure of the honeycomb ventilation holes 23 can improve the pressure resistance and cushioning performance of the foamed silicone buffer column 17, absorbing the mechanical impact force during installation or use. Together with the rubber buffer layer 15, it can effectively protect the copper conductor 1 and the ceramicized silicone rubber insulation layer 2 inside the rubber buffer layer 15, and can also improve the cable flexibility. The glass fiber filling cotton 24 can support and fix the foamed silicone buffer column 17, fixing the foamed silicone buffer column 17 inside the buffer inner groove 16, preventing the foamed silicone buffer column 17 from shifting and affecting its cushioning effect.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flexible mineral-insulated fire-resistant cable, characterized in that, include: Multiple copper wire conductors (1) are provided with a ceramicized silicone rubber insulation layer (2) on the outside of the copper wire conductors (1), and a modified polyolefin inner waterproof layer (3) is provided on the outside of the ceramicized silicone rubber insulation layer (2). An aluminum foil strip electromagnetic shielding layer (4) is provided on the side wall of the modified polyolefin inner waterproof layer (3), and a polytetrafluoroethylene outer waterproof layer (5) is provided on the side wall of the aluminum foil strip electromagnetic shielding layer (4). A ceramicized silicone rubber fireproof layer (6) is provided on the side wall of the polytetrafluoroethylene outer waterproof layer (5), and a rubber outer sheath (7) is provided on the side wall of the ceramicized silicone rubber fireproof layer (6). A first supporting half-ring (8) is provided on the right side of the rubber outer sheath (7), and screws are provided at both ends of the first supporting half-ring (8). The groove (9) is provided on the left side of the rubber outer sheath (7), and the two ends of the second support half ring (10) are provided with connection holes (11). The bottom surface of the connection hole (11) is provided with an operation hole (26), and a fixing bolt (12) is slidably installed inside the operation hole (26). The fixing bolt (12) is threadedly connected to the thread groove (9). The first support half ring (8) and the side wall of the rubber support plate (19) are provided with multiple ball grooves (13). The ball grooves (13) are slidably installed with movable balls (14). The modified polyolefin inner waterproof layer (3) is provided with a first buffer device on the outside. The ceramicized silicone rubber insulation layer (2) is provided with a second buffer device inside.

2. The flexible mineral-insulated fire-resistant cable according to claim 1, characterized in that, The first buffer device includes: A rubber buffer layer (15) is disposed inside the aluminum foil strip electromagnetic shielding layer (4) and is sleeved on the side wall of the ceramicized silicone rubber insulating layer (2). A buffer inner groove (16) is provided inside the rubber buffer layer (15), and a plurality of foamed silicone buffer columns (17) are provided inside the buffer inner groove (16). The foamed silicone buffer columns (17) are evenly distributed inside the buffer inner groove (16).

3. The flexible mineral-insulated fire-resistant cable according to claim 1, characterized in that, The second buffer device includes: Multiple rubber buffer rings (18) are provided inside the ceramicized silicon rubber insulation layer (2). Rubber support plates (19) are provided on both sides of the copper wire conductor (1). The rubber support plates (19) are fixedly installed on the side wall of the rubber buffer rings (18). A rubber support strip (27) is fixedly installed at one end of the rubber support plate (19). The rubber buffer rings (18), rubber support plates (19), and rubber support strips (27) are distributed in segments inside the ceramicized silicon rubber insulation layer (2).

4. A flexible mineral-insulated fire-resistant cable according to claim 3, characterized in that, The copper wire conductor (1) is made of multiple strands of copper wire bonded together, and the copper wire conductor (1) has a glass fiber filling core (21) in the middle.

5. A flexible mineral-insulated fire-resistant cable according to claim 4, characterized in that, The sidewall of the copper wire conductor (1) is coated with a nano-anti-corrosion coating (22).

6. A flexible mineral-insulated fire-resistant cable according to claim 5, characterized in that, The copper wire conductor (1) has a glass fiber filling layer (20) on one side, and the glass fiber filling layer (20) is evenly distributed inside the support compartment formed by the rubber support plate (19).

7. A flexible mineral-insulated fire-resistant cable according to claim 2, characterized in that, The foamed silicone buffer column (17) has multiple honeycomb ventilation holes (23) inside.

8. A flexible mineral-insulated fire-resistant cable according to claim 7, characterized in that, The foamed silicone buffer column (17) is provided with glass fiber filling cotton (24) on the outside, and the glass fiber filling cotton (24) is evenly distributed inside the buffer inner groove (16).

9. A flexible mineral-insulated fire-resistant cable according to claim 1, characterized in that, The sidewall of the rubber outer sheath (7) is coated with a fire-retardant coating (25).

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