A fireproof cable
By designing the armor layer, sealing layer, fireproof cavity, buffer cavity, shear mesh and sheath layer in the fireproof cable, the problem of fireproof cables being easily damaged under shear force and external pressure is solved, and higher fire resistance and stability are achieved.
Patent Information
- Application Number
- CN202421696683.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-07-17
AI Technical Summary
Existing fire-proof cables are prone to breakage when subjected to large shear forces and external pressure, resulting in internal fire-proof filler leakage and reducing fire-proof performance.
A fire-proof cable is designed, which includes a plurality of cable cores, armored layers, sealing layers, a second fire-proof filler in the fire-proof cavity, a buffer member in the buffer cavity, a shear mesh and a sheath layer. Through these structures, the cable can effectively block and cushion when subjected to shear forces and external pressure, reducing the possibility of damage.
It effectively improves the fire resistance of the cable, reduces the possibility of fire-proof filler leakage, and enhances the stability and service life of the cable under shear force and external pressure.
Smart Images
Figure CN222720119U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of cable technology, and in particular to a fireproof cable. Background Art
[0002] A cable is a device for transmitting electric energy or signals. It is made of one or more mutually insulated conductors and an outer insulating protective layer. There are many types of cables, such as power cables, communication cables, control cables, fireproof cables, etc. Among them, fireproof cables are cables with flame retardant properties. When encountering a fire, they can limit the spread of fire and provide certain fire protection. Existing fireproof cables usually use mica tape wrapped around the surface of the conductor and fill the cable with fireproof fillers to achieve fire protection. During use, if the cable is subjected to large shear force and external pressure, it will be damaged, and the internal fireproof filler will leak from the damaged area, resulting in reduced fire resistance. Therefore, a fireproof cable is proposed. Utility Model Content
[0003] The purpose of the present application is to provide a fireproof cable to solve the technical problem that if the cable is subjected to large shear force and external pressure, it will be damaged, and the internal fireproof filler will leak from the damaged part, resulting in reduced fireproof performance.
[0004] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:
[0005] A fire-proof cable, comprising:
[0006] A plurality of cable cores, wherein the cable cores include a conductor, a mica tape, an insulating layer and a shielding layer which are sequentially distributed from the inside to the outside;
[0007] An armor layer is arranged on the outside of multiple cable cores, a filling cavity is formed between the armor layer and the multiple cable cores, a first fireproof filler is arranged in the filling cavity, a sealing layer is arranged on the outside of the armor layer, a fireproof cavity is formed between the two, a second fireproof filler is arranged in the fireproof cavity, a protective layer is arranged on the outside of the armor layer, a buffer cavity is formed between the two, a buffer part for buffering external pressure is arranged in the buffer cavity, and an anti-shear net and a sheath layer are arranged on the outside of the protective layer in sequence.
[0008] Furthermore, a central column is provided in the filling cavity, and the central column is provided with partitions having the same number as the cable cores, and the partitions are provided with support blocks that overlap with the armor layer. The filling cavity is divided into multiple compartments by the central column, multiple partitions and multiple support blocks, and the cable core and the first fire-retardant filler are both located in the compartments.
[0009] Furthermore, the central column is configured with a central hole which is coaxial with the central column and distributed along its length direction.
[0010] Furthermore, the support block is in an arc shape, and is provided with through holes distributed along its length direction.
[0011] Furthermore, the outer surface of the armor layer is configured with a spiral groove.
[0012] Furthermore, the buffer component includes an arch block and a buffer block, both of which are arranged in the buffer cavity and are in multiple numbers. The buffer block is configured with buffer holes distributed along its length direction.
[0013] Furthermore, an embedding groove is constructed on the outer surface of the protective layer, and the anti-shear net is embedded in the embedding groove.
[0014] Furthermore, the sheath layer includes a metal sheath and a low-smoke halogen-free flame retardant layer distributed inside and outside.
[0015] The beneficial effects of this application are as follows:
[0016] The present application achieves fire protection by wrapping mica tape around the outer surface of the conductor, a first fireproof filler arranged in the filling cavity, and a second fireproof filler arranged in the fireproof cavity. When the cable is subjected to large shear force and external pressure, the shear force is blocked together with the anti-shear net and the sheath layer, and the external pressure is buffered by the buffer part, thereby reducing the possibility of cable damage, thereby reducing the possibility of leakage of the first fireproof filler and the second fireproof filler from the damaged part, thereby ensuring fire protection performance, and therefore being more practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional diagram of the structure of this application;
[0018] Figure 2 This application Figure 1 The enlarged view of point A in the middle;
[0019] Figure 3 This application Figure 1 The enlarged view of point B in the middle;
[0020] Figure 4 This application Figure 1 Enlarged view of point C in the middle;
[0021] Figure 5 It is a partial structural stereogram of this application.
[0022] Figure numerals: 1. conductor; 2. mica tape; 3. insulation layer; 4. shielding layer; 5. armor layer; 6. first fireproof filler; 7. sealing layer; 8. second fireproof filler; 9. protective layer; 10. anti-shear net; 11. center column; 12. partition; 13. support block; 14. center hole; 15. through hole; 16. groove; 17. arch block; 18. buffer block; 19. buffer hole; 20. embedded groove; 21. metal sheath; 22. low-smoke halogen-free flame retardant layer. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.
[0024] like Figure 1-Figure 5 As shown, a fireproof cable proposed in one embodiment of the present application includes:
[0025] A plurality of cable cores, the cable cores comprising a conductor 1, a mica tape 2, an insulating layer 3 and a shielding layer 4 which are sequentially distributed from the inside to the outside, the mica tape 2 is wrapped around the outer surface of the conductor 1, the insulating layer 3 is fixed on the outer surface of the mica tape 2, the insulating layer 3 can ensure that the current, electromagnetic waves and light waves transmitted by the conductor 1 will not flow to the outside, the shielding layer 4 is fixed on the outer surface of the insulating layer 3, and the magnetic field generated by the conductor 1 can be shielded by the shielding layer 4;
[0026] An armor layer 5 is arranged on the outside of multiple cable cores. The multiple cable cores are bound by the armor layer 5 to prevent the cable cores from loosening and protect the cable cores at the same time. A filling cavity is formed between the armor layer 5 and the multiple cable cores. A first fireproof filler 6 is arranged in the filling cavity. The first fireproof filler 6 can be sealed by the armor layer 5. A sealing layer 7 is arranged on the outside of the armor layer 5 to form a fireproof cavity between the two. A second fireproof filler 8 is arranged in the fireproof cavity. The second fireproof filler 8 can be sealed by the sealing layer 7. A protective layer 9 is arranged on the outside of the armor layer 5 to form a buffer cavity between the two. A buffer for buffering external pressure is arranged in the buffer cavity. An anti-shear net 10 and a sheath layer are arranged on the outside of the protective layer 9 in sequence. The anti-shear net 10 and the sheath layer are used to block the shear force together;
[0027] When in use, fire protection is achieved by wrapping the mica tape 2 around the outer surface of the conductor 1, the first fireproof filler 6 arranged in the filling cavity, and the second fireproof filler 8 arranged in the fireproof cavity. When the cable is subjected to a large shear force, the shear force is blocked together with the sheath layer by the anti-shear net 10. When the cable is subjected to external pressure, the external pressure is buffered by the buffer, reducing the possibility of damage to the cable, thereby reducing the possibility of leakage of the first fireproof filler 6 and the second fireproof filler 8 from the damaged part, thereby ensuring the fireproof performance;
[0028] In summary, the present application achieves fire protection by wrapping the mica tape 2 around the outer surface of the conductor 1, the first fire-proof filler 6 arranged in the filling cavity, and the second fire-proof filler 8 arranged in the fire-proof cavity. When the cable is subjected to large shear force and external pressure, the anti-shear net 10 and the sheath layer together block the shear force, and the buffer part buffers the external pressure, thereby reducing the possibility of cable damage, thereby reducing the possibility of leakage of the first fire-proof filler 6 and the second fire-proof filler 8 from the damaged part, ensuring fire-proof performance, and therefore more practical.
[0029] like Figure 2-Figure 3 As shown, in some embodiments, a central column 11 is provided in the filling cavity, and the central column 11 is provided with partitions 12 having the same number as the cable cores, and multiple partitions 12 are fixedly arranged on the outer surface of the central column 11 and distributed in a circular array, and support blocks 13 that are in contact with and overlap the armor layer 5 are provided on the partition 12, and the support blocks 13 are fixedly arranged on the partition 12, and the filling cavity is divided into multiple compartments by the central column 11, multiple partitions 12 and multiple support blocks 13, and the cable cores and the first fireproof filler 6 are both located in the compartments;
[0030] Referring to the above, when the cable is subjected to external pressure, the central column 11, multiple partitions 12 and multiple support blocks 13 together form a support structure, which reduces the possibility of cable deformation, improves the stability of use, and further reduces the possibility of cable damage.
[0031] like Figure 2 As shown, in some embodiments, the central column 11 is configured with a central hole 14 coaxial therewith and distributed along its length direction;
[0032] Referring to the above, when the cable is subjected to external force, the arrangement of the center hole 14 can reduce stress concentration to a certain extent, thereby further improving the stability in use and reducing the overall weight of the cable.
[0033] like Figure 3 As shown, in some embodiments, the support block 13 is arc-shaped, and the support block 13 is provided with through holes 15 distributed along its length direction;
[0034] Referring to the above, through the arc setting, the contact area between the support block 13 and the armor layer 5 can be increased, and the connection strength between the two can be improved. Through the setting of the through hole 15, the stress concentration can be reduced to a certain extent, thereby further improving the use stability and reducing the overall weight of the cable.
[0035] like Figure 5 As shown, in some embodiments, the outer surface of the armor layer 5 is configured with a spiral groove 16;
[0036] With reference to the above, by providing the groove 16, not only the contact area between the second fireproof filler 8 and the armor layer 5 can be increased, but also the strength of the armor layer 5 against external pressure can be improved.
[0037] like Figure 3 As shown, in some embodiments, the buffer member includes a plurality of arch blocks 17 and buffer blocks 18, both of which are disposed in the buffer cavity. The plurality of arch blocks 17 and buffer blocks 18 are distributed in a circular array, and the buffer block 18 is configured with buffer holes 19 distributed along its length direction;
[0038] Referring to the above, when the cable is subjected to external force, the external pressure is buffered by the arch block 17 and the buffer block 18. The arch can withstand greater force. The setting of the buffer hole 19 can reduce stress concentration to a certain extent, thereby further improving the stability of use and reducing the overall weight of the cable.
[0039] like Figure 4 As shown, in some embodiments, the outer surface of the protective layer 9 is configured with an embedding groove 20, and the anti-shear net 10 is embedded in the embedding groove 20;
[0040] With reference to the above, by providing the embedding groove 20, the contact area between the anti-shear net 10 and the protective layer 9 can be increased, and the connection strength between the two can be improved, thereby further improving the stability in use.
[0041] like Figure 4 As shown, in some embodiments, the sheath layer includes a metal sheath 21 and a low-smoke halogen-free flame retardant layer 22 distributed inside and outside. The metal sheath 21 is formed by a metal strip spirally wound on the outer surface of the protective layer 9, which can block the shear force, and the low-smoke halogen-free flame retardant layer 22 can reduce the harmful gases generated in the event of a fire.
[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A fireproof cable, characterized in that: include: A plurality of cable cores, each of which comprises a conductor (1), a mica tape (2), an insulating layer (3) and a shielding layer (4) which are sequentially distributed from the inside to the outside; An armor layer (5) is arranged on the outside of a plurality of cable cores, a filling cavity is formed between the armor layer (5) and the plurality of cable cores, a first fireproof filler (6) is arranged in the filling cavity, a sealing layer (7) is arranged on the outside of the armor layer (5) and a fireproof cavity is formed between the two, a second fireproof filler (8) is arranged in the fireproof cavity, a protective layer (9) is arranged on the outside of the armor layer (5) and a buffer cavity is formed between the two, a buffer part for buffering external pressure is arranged in the buffer cavity, and an anti-shear net (10) and a sheath layer are arranged in sequence on the outside of the protective layer (9).
2. The fireproof cable according to claim 1, characterized in that: A central column (11) is arranged in the filling cavity, and the central column (11) is provided with partitions (12) having the same number as the cable cores, and the partitions (12) are provided with support blocks (13) which are in contact with and overlap the armor layer (5). The filling cavity is divided into a plurality of compartments by the central column (11), the plurality of partitions (12) and the plurality of support blocks (13), and the cable cores and the first fireproof filler (6) are both located in the compartments.
3. The fireproof cable according to claim 2, characterized in that: The central column (11) is provided with a central hole (14) which is coaxial with the central column and distributed along its length direction.
4. The fireproof cable according to claim 2, characterized in that: The support block (13) is constructed in an arc shape, and is provided with through holes (15) distributed along its length direction.
5. The fireproof cable according to claim 1, characterized in that: The outer surface of the armor layer (5) is configured with a spiral groove (16).
6. The fireproof cable according to claim 1, characterized in that: The buffer component comprises an arch block (17) and a buffer block (18) both of which are arranged in a buffer cavity and are in multiple numbers. The buffer block (18) is provided with buffer holes (19) distributed along its length direction.
7. The fireproof cable according to claim 1, characterized in that: The outer surface of the protective layer (9) is configured with an embedding groove (20), and the anti-shear net (10) is embedded in the embedding groove (20).
8. The fireproof cable according to claim 1, characterized in that: The sheath layer comprises a metal sheath (21) and a low-smoke halogen-free flame retardant layer (22) which are distributed inside and outside.