Fireproof insulated cable

Abstract

The invention belongs to the technical field of cables, and particularly relates to a fire-resistant insulated cable which comprises a conductive wire core, a first insulating layer is arranged on the outer side of the conductive wire core, a second insulating layer is arranged on the outer side of the first insulating layer, a shielding layer is arranged on the outer side of the second insulating layer, a first fire-resistant layer is arranged on the outer side of the shielding layer, and a second fire-resistant layer is arranged on the outer side of the first fire-resistant layer. A second fireproof layer is arranged on the outer side of the first fireproof layer, a third fireproof layer is arranged on the outer side of the second fireproof layer, and a fireproof assembly is arranged on the outer side of the third fireproof layer. By arranging the first fireproof layer, the second fireproof layer, the third fireproof layer and the fireproof assembly, the fireproof performance of the cable can be greatly improved, and the fire catching phenomenon of the cable can be avoided to a certain extent by improving the fireproof performance of the cable.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a fire-resistant insulated cable. Background Art

[0002] Cable is a wire product used to transmit electrical energy and information and realize electromagnetic energy conversion. It is usually composed of one or more mutually insulated conductors and an outer insulating protective layer. These conductors can be single or multiple groups of wires. Each group of wires is insulated from each other and often twisted around a center. The entire outer layer is covered with a highly insulating covering layer. Insulated cable is one of the cables.

[0003] However, the fire resistance of the existing insulated cables is limited, so fire may occur during the operation of the insulated cables, which poses a safety hazard. Therefore, a fire-resistant insulated cable is invented. Summary of the invention

[0004] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0005] A fire-resistant insulated cable comprises a conductive core, a first insulating layer is arranged on the outside of the conductive core, a second insulating layer is arranged on the outside of the first insulating layer, a shielding layer is arranged on the outside of the second insulating layer, a first fire-resistant layer is arranged on the outside of the shielding layer, a second fire-resistant layer is arranged on the outside of the first fire-resistant layer, a third fire-resistant layer is arranged on the outside of the second fire-resistant layer, and a fire-resistant assembly is arranged on the outside of the third fire-resistant layer.

[0006] As a preferred solution of the fire-resistant insulated cable described in the present invention, the fire-resistant component comprises:

[0007] A first inner sleeve, wherein the outer side of the third fire-resistant layer is provided with a first inner sleeve;

[0008] a first outer sleeve, wherein the first inner sleeve is provided with a first outer sleeve on the outer side thereof;

[0009] Dry powder fire extinguishing agent, the dry powder fire extinguishing agent is arranged between the first inner sleeve and the first outer sleeve, and the dry powder fire extinguishing agent is filled with glue so as to fix the dry powder fire extinguishing agent between the first inner sleeve and the first outer sleeve.

[0010] As a preferred solution of the fire-resistant insulated cable described in the present invention, a pressure-resistant component is provided on the outside of the fire-resistant component to improve the pressure resistance of the cable.

[0011] As a preferred solution of the fire-resistant insulated cable described in the present invention, the pressure-resistant component comprises:

[0012] A second inner sleeve, wherein the outer side of the first outer sleeve is provided with a second inner sleeve;

[0013] a second outer sleeve, wherein the outer side of the first inner sleeve is provided with a second outer sleeve;

[0014] Elastic balls, a plurality of elastic balls are arranged between the second inner sleeve and the second outer sleeve, and the interior of the elastic balls is hollow;

[0015] Elastic particles are arranged between the second inner sleeve, the second outer sleeve and the elastic ball.

[0016] As a preferred solution of the fire-resistant insulated cable described in the present invention, it also includes:

[0017] The invention discloses a reeling and winding assembly for adjusting the length of a fire-resistant insulated cable body, and the reeling and winding assembly is arranged on the fire-resistant insulated cable body.

[0018] As a preferred solution of the fire-resistant insulated cable described in the present invention, the reeling and unreeling assembly comprises:

[0019] Box body;

[0020] Through holes, both left and right sides of the box body are provided with through holes, and the fire-resistant insulated cable body passes through the through holes;

[0021] A rotating shaft, wherein both upper and lower sides of the rotating shaft are rotatably connected to the rotating shaft through bearings;

[0022] A roller, wherein the roller is fixedly installed between two sets of rotating shafts;

[0023] The mounting hole is provided on the roller, and the fire-resistant insulated cable body is fixedly mounted in the mounting hole.

[0024] As a preferred solution of the fire-resistant insulated cable described in the present invention, the reeling and unreeling assembly further comprises:

[0025] A driving assembly is used for rotating the rotating shaft, and the driving assembly is arranged on the top of the box body.

[0026] As a preferred solution of the fire-resistant insulated cable described in the present invention, the driving assembly comprises:

[0027] A hollow tube, the hollow tube is fixedly installed on the top of the rotating shaft;

[0028] A solid rod, the solid rod being slidably connected in the hollow tube;

[0029] A circular plate fixedly mounted on the top of the solid rod;

[0030] The spring is sleeved on the solid rod, and the two ends of the spring are respectively fixedly connected to the circular plate and the hollow tube.

[0031] As a preferred solution of the fire-resistant insulated cable described in the present invention, the driving assembly further comprises:

[0032] A first frame, wherein the first frame is fixedly mounted on the top of the box body;

[0033] The second frame is fixedly installed on the side of the circular plate facing the box body, and the second frame is inserted into the first frame.

[0034] As a preferred solution of the fire-resistant insulated cable described in the present invention, a limiting component is provided between the hollow tube and the solid rod;

[0035] The limiting component comprises:

[0036] Slide grooves are provided on both sides of the inner cavity of the hollow tube;

[0037] Limiting columns, both ends of the solid rod are fixedly installed with limiting columns, and the limiting columns are slidably connected in the sliding groove.

[0038] Compared with existing technologies:

[0039] 1. By providing the first fire-resistant layer, the second fire-resistant layer, the third fire-resistant layer and the fire-resistant assembly, the fire resistance of the cable can be greatly improved. By improving the fire resistance of the cable, the cable can be prevented from catching fire to a certain extent, thereby improving safety; in addition, by providing the first insulating layer and the second insulating layer, the cable can be double-insulated, thereby improving the insulation effect of the cable to a certain extent; in addition, by providing the pressure-resistant assembly, the pressure resistance of the cable can be improved, thereby improving the service life of the cable to a certain extent;

[0040] 2. By arranging a retractable and reeling assembly on the fire-resistant insulated cable body, it is possible to adjust the length of the fire-resistant insulated cable body according to usage requirements when using the fire-resistant insulated cable body, thereby avoiding the situation where the length of the fire-resistant insulated cable body is insufficient or the length of the fire-resistant insulated cable body is too long, thereby improving the use flexibility of the fire-resistant insulated cable body. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a cross-sectional schematic diagram of the fire-resistant insulated cable of the present invention;

[0042] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement in the middle;

[0043] Figure 3 It is a front view schematic diagram of the reeling and unreeling assembly of the present invention;

[0044] Figure 4For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0045] Figure 5 It is a schematic diagram of the box structure of the present invention;

[0046] Figure 6 It is a cross-sectional schematic diagram of the hollow tube of the present invention;

[0047] Figure 7 It is a schematic diagram of the first block and the second block structure of the present invention.

[0048] In the figure: a conductive core 10, a first insulating layer 11, a second insulating layer 12, a shielding layer 13, a first fire-resistant layer 14, a second fire-resistant layer 15, a third fire-resistant layer 16, a first inner sleeve 171, a first outer sleeve 172, a dry powder fire extinguishing agent 173, a second inner sleeve 181, a second outer sleeve 182, an elastic ball 183, elastic particles 184, a box body 20, a through hole 21, a rotating shaft 22, a roller 23, a mounting hole 24, a hollow tube 30, a solid rod 31, a circular plate 32, a spring 33, a slide groove 34, a limiting column 35, a first frame 36, and a second frame 37. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] The present invention provides a fire-resistant insulated cable, see Figure 1-Figure 7 , comprising a conductive core 10, a first insulating layer 11 is provided on the outer side of the conductive core 10, a second insulating layer 12 is provided on the outer side of the first insulating layer 11, a shielding layer 13 is provided on the outer side of the second insulating layer 12, a first fire-resistant layer 14 is provided on the outer side of the shielding layer 13, a second fire-resistant layer 15 is provided on the outer side of the first fire-resistant layer 14, a third fire-resistant layer 16 is provided on the outer side of the second fire-resistant layer 15, and a fire-resistant assembly is provided on the outer side of the third fire-resistant layer 16;

[0051] Regarding the first insulating layer 11: the material of the first insulating layer 11 is set to polyethylene, which has excellent electrical insulation performance, especially outstanding high-frequency insulation performance, high chemical stability, good water resistance, and good flexibility and low-temperature performance;

[0052] Regarding the second insulating layer 12: The material of the second insulating layer 12 is set to be ceramic silicone rubber, which has the softness and insulation performance of silicone rubber at room temperature, and will be quickly ceramicized when exposed to high temperature to form a hard ceramic body, which plays a good role in fire prevention, heat insulation and insulation, and has a certain mechanical strength;

[0053] Regarding the shielding layer 13: The shielding layer 13 is set as a metal shielding layer, which is woven from multiple strands of fine metal wires (usually copper wires or tinned copper wires) and wrapped around the insulation layer of the cable like a woven metal net; the metal shielding layer not only has a good shielding effect, but also can adapt to the bending and movement of the cable and is not easy to break;

[0054] Regarding the first refractory layer 14: the material of the first refractory layer 14 is set to be mica, which has good high temperature resistance, can maintain a stable crystal structure at high temperatures, and has excellent electrical insulation performance, strong chemical stability, and a good sheet structure, which can effectively prevent the spread of heat and flames;

[0055] Regarding the second fire-resistant layer 15: the material of the second fire-resistant layer 15 is aluminum hydroxide and magnesium hydroxide, which have good flame retardant properties. When heated, they will undergo a decomposition reaction and absorb a large amount of heat, thereby reducing the temperature around the cable and playing a fire-proof role. At the same time, the water vapor generated by the decomposition can also dilute the combustible gas and inhibit the combustion.

[0056] About the third refractory layer 16: The material of the third refractory layer 16 is set to be a ceramic material, which has an extremely high melting point and good high temperature resistance, can maintain stable physical and chemical properties at high temperatures, has high mechanical strength, excellent insulation performance, and good corrosion resistance.

[0057] The fire-resistant assembly includes: a first inner sleeve 171, a first outer sleeve 172, and a dry powder fire extinguishing agent 173;

[0058] A first inner sleeve 171 is provided on the outside of the third fire-resistant layer 16 , a first outer sleeve 172 is provided on the outside of the first inner sleeve 171 , a dry powder fire extinguishing agent 173 is provided between the first inner sleeve 171 and the first outer sleeve 172 , and the dry powder fire extinguishing agent 173 is filled with glue so as to fix the dry powder fire extinguishing agent 173 between the first inner sleeve 171 and the first outer sleeve 172 .

[0059] A compression-resistant component is provided on the outside of the fire-resistant component to improve the compression resistance of the cable.

[0060] The pressure-resistant component includes: a second inner sleeve 181, a second outer sleeve 182, elastic balls 183, and elastic particles 184;

[0061] A second inner sleeve 181 is disposed on the outer side of the first outer sleeve 172, a second outer sleeve 182 is disposed on the outer side of the first inner sleeve 171, a plurality of elastic balls 183 are disposed between the second inner sleeve 181 and the second outer sleeve 182, and the interior of the elastic balls 183 is hollow, and elastic particles 184 are disposed between the second inner sleeve 181, the second outer sleeve 182 and the elastic balls 183; wherein the material of the elastic balls 183 is spring steel, and the material of the elastic particles 184 is rubber.

[0062] The composition process of fire-resistant insulated cable is as follows:

[0063] A first insulating layer 11 is arranged on the outside of the conductive core 10, a second insulating layer 12 is arranged on the outside of the first insulating layer 11, a shielding layer 13 is arranged on the outside of the second insulating layer 12, a first fire-resistant layer 14 is arranged on the outside of the shielding layer 13, a second fire-resistant layer 15 is arranged on the outside of the first fire-resistant layer 14, and a third fire-resistant layer 16 is arranged on the outside of the second fire-resistant layer 15; a first inner sleeve 171 is arranged on the outside of the third fire-resistant layer 16, and a first outer sleeve 172 is arranged on the outside of the first inner sleeve 171, and then glue is mixed on the dry After mixing with the dry powder fire extinguishing agent 173, the dry powder fire extinguishing agent 173 can be filled between the first inner sleeve 171 and the first outer sleeve 172, so that a fire-resistant assembly can be formed on the outside of the third fire-resistant layer 16; then, the second inner sleeve 181 is set on the outside of the first outer sleeve 172, and the second outer sleeve 182 is set on the outside of the second inner sleeve 181, and then, the elastic balls 183 and the elastic particles 184 are filled between the second inner sleeve 181 and the second outer sleeve 182, so that a pressure-resistant assembly can be formed on the outside of the fire-resistant assembly.

[0064] It also includes: a reeling and unreeling assembly for adjusting the length of the fire-resistant insulated cable body, and the reeling and unreeling assembly is arranged on the fire-resistant insulated cable body;

[0065] The reeling and unreeling assembly includes: a box body 20, a through hole 21, a rotating shaft 22, a roller 23, and a mounting hole 24;

[0066] Through holes 21 are provided on both the left and right sides of the box body 20, and the fire-resistant insulated cable body passes through the through holes 21. The upper and lower sides of the rotating shaft 22 are rotatably connected to the rotating shaft 22 through bearings. The roller 23 is fixedly installed between the two groups of rotating shafts 22. The mounting hole 24 is provided on the roller 23, and the fire-resistant insulated cable body is fixedly installed in the mounting hole 24.

[0067] The reeling and unreeling assembly further includes: a driving assembly for rotating the rotating shaft 22, and the driving assembly is arranged on the top of the box body 20;

[0068] The driving assembly includes: a hollow tube 30, a solid rod 31, a circular plate 32, a spring 33, a first frame 36, and a second frame 37;

[0069] A hollow tube 30 is fixedly installed on the top of the rotating shaft 22 located above, a solid rod 31 is slidably connected in the hollow tube 30, a circular plate 32 is fixedly installed on the top of the solid rod 31, a spring 33 is sleeved on the solid rod 31, and two ends of the spring 33 are fixedly connected to the circular plate 32 and the hollow tube 30 respectively, a first frame 36 is fixedly installed on the top of the box body 20, and a second frame 37 is fixedly installed on the side of the circular plate 32 facing the box body 20, and the second frame 37 is inserted in the first frame 36.

[0070] A limit assembly is provided between the hollow tube 30 and the solid rod 31;

[0071] The limiting assembly includes: a slide slot 34 and a limiting column 35;

[0072] Slide grooves 34 are provided on both sides of the inner cavity of the hollow tube 30 , and limiting columns 35 are fixedly installed on both ends of the solid rod 31 , and the limiting columns 35 are slidably connected in the slide grooves 34 .

[0073] When the length of the fire-resistant insulated cable body needs to be adjusted, the specific steps are as follows:

[0074] First, the circular plate 32 is moved away from the box body 20. At this time, the elastic force of the spring 33 will be deformed until the second frame 37 is moved out of the first frame 36. During this process, the limiting column 35 will slide in the slide groove 34. After the second frame 37 is moved out of the first frame 36, the circular plate 32 can be rotated. When the circular plate 32 rotates, it will drive the solid rod 31 to rotate. When the solid rod 31 rotates, it will drive the hollow tube 30 to rotate through the slide groove 34 and the limiting column 35. When the hollow tube 30 rotates, it will drive the rotating shaft 22 to rotate. When the rotating shaft 22 rotates, it will drive the roller 23 to rotate. When the roller 23 rotates, it will wind or release the fire-resistant insulated cable body, so that the use length of the fire-resistant insulated cable body can be adjusted. After adjusting the length of the fire-resistant insulated cable body, first align the second frame 37 and the first frame 36. After alignment, the second frame 37 can be inserted into the first frame 36, so as to prevent the roller 23 from self-rotating.

[0075] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fire-resistant insulated cable, comprising a conductive core (10), characterized in that: A first insulating layer (11) is provided on the outer side of the conductive core (10), a second insulating layer (12) is provided on the outer side of the first insulating layer (11), a shielding layer (13) is provided on the outer side of the second insulating layer (12), a first fire-resistant layer (14) is provided on the outer side of the shielding layer (13), a second fire-resistant layer (15) is provided on the outer side of the first fire-resistant layer (14), a third fire-resistant layer (16) is provided on the outer side of the second fire-resistant layer (15), and a fire-resistant component is provided on the outer side of the third fire-resistant layer (16).

2. A fire-resistant insulated cable according to claim 1, characterized in that: The refractory assembly comprises: A first inner sleeve (171), wherein the outer side of the third fire-resistant layer (16) is provided with the first inner sleeve (171); A first outer sleeve (172), wherein the first inner sleeve (171) is provided with the first outer sleeve (172) on its outer side; A dry powder fire extinguishing agent (173), wherein the dry powder fire extinguishing agent (173) is provided between the first inner sleeve (171) and the first outer sleeve (172), and the dry powder fire extinguishing agent (173) is filled with glue so as to fix the dry powder fire extinguishing agent (173) between the first inner sleeve (171) and the first outer sleeve (172).

3. A fire-resistant insulated cable according to claim 2, characterized in that: A compression-resistant component is arranged on the outer side of the fire-resistant component to improve the compression resistance of the cable.

4. A fire-resistant insulated cable according to claim 3, characterized in that: The pressure-resistant component comprises: A second inner sleeve (181), wherein the second inner sleeve (181) is disposed on the outer side of the first outer sleeve (172); A second outer sleeve (182), wherein the second outer sleeve (182) is disposed on the outer side of the first inner sleeve (171); Elastic balls (183), a plurality of elastic balls (183) are provided between the second inner sleeve (181) and the second outer sleeve (182), and the interior of the elastic balls (183) is hollow; Elastic particles (184), elastic particles (184) are arranged between the second inner sleeve (181), the second outer sleeve (182) and the elastic ball (183).

5. A fire-resistant insulated cable according to claim 1, characterized in that: Also includes: The invention discloses a reeling and winding assembly for adjusting the length of a fire-resistant insulated cable body, and the reeling and winding assembly is arranged on the fire-resistant insulated cable body.

6. A fire-resistant insulated cable according to claim 5, characterized in that: The reeling and unreeling assembly comprises: Box body (20); Through holes (21), the box body (20) is provided with through holes (21) on both left and right sides, and the fire-resistant insulated cable body passes through the through holes (21); A rotating shaft (22), wherein both upper and lower sides of the rotating shaft (22) are rotatably connected to the rotating shaft (22) via bearings; A roller (23), wherein the roller (23) is fixedly installed between the two sets of rotating shafts (22); A mounting hole (24) is provided on the roller (23), and the fire-resistant insulated cable body is fixedly mounted in the mounting hole (24).

7. A fire-resistant insulated cable according to claim 6, characterized in that: The reeling and unreeling assembly also includes: A driving assembly is used to rotate the rotating shaft (22), and the driving assembly is arranged on the top of the box body (20).

8. A fire-resistant insulated cable according to claim 7, characterized in that: The drive assembly comprises: A hollow tube (30) is fixedly mounted on the top of the rotating shaft (22) located above; A solid rod (31), wherein the solid rod (31) is slidably connected in the hollow tube (30); A circular plate (32) fixedly mounted on the top of the solid rod (31); A spring (33) is sleeved on the solid rod (31), and two ends of the spring (33) are respectively fixedly connected to the circular plate (32) and the hollow tube (30).

9. A fire-resistant insulated cable according to claim 8, characterized in that: The drive assembly also includes: A first square frame (36), the first square frame (36) is fixedly mounted on the top of the box body (20); The second frame (37) is fixedly installed on one side of the circular plate (32) facing the box body (20), and the second frame (37) is inserted into the first frame (36).

10. A fire-resistant insulated cable according to claim 9, characterized in that: A limiting component is provided between the hollow tube (30) and the solid rod (31); The limiting component comprises: A slide groove (34), wherein slide grooves (34) are provided on both sides of the inner cavity of the hollow tube (30); A limiting column (35), wherein the limiting columns (35) are fixedly installed at both ends of the solid rod (31), and the limiting columns (35) are slidably connected in the sliding groove (34).

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