Fireproof cable and its components

Abstract

The present invention relates to the field of cables, and specifically to a fireproof cable and its components, including a low-smoke halogen-free outer sheath, a plurality of twisted copper conductors arranged in the low-smoke halogen-free outer sheath, an insulating layer coated on the outside of the twisted copper conductors, and a filler filled in the low-smoke halogen-free outer sheath; an inner conduit and an outer conduit arranged in the low-smoke halogen-free outer sheath, a plurality of twisted copper conductors are located in the inner conduit, the inner conduit is arranged in the outer conduit, and a conveying channel is formed between the outer surface of the inner conduit and the inner surface of the outer conduit; a pipe plug, a plurality of branch pipes arranged on the outer surface of the low-smoke halogen-free outer sheath; a plurality of extension pipes arranged on the outer surface of the outer conduit, the extension pipes extend into the filler, and the extension pipes are connected to the conveying channel through a guide hole arranged on the outer surface of the outer conduit; an opening and closing portion arranged in the extension pipe, and the opening and closing portion is used to close or open the extension pipe. Through the present invention, when a fire occurs, the time that the fireproof cable can work normally can be effectively increased.

Description

Technical Field

[0001] The invention relates to the field of cables, and in particular to a fireproof cable and a component thereof. Background Art

[0002] In the event of a fire, the fireproof cable will continue to supply power for a period of time, so the equipment that needs power will continue to work for a period of time in the event of a fire. For example, equipment that needs to save information can use this period of time to save the information. However, the applicant has found that in the event of a fire, due to the high temperature, the time that the fireproof cable can work normally is still very short.

[0003] In the patent with application number CN201811277178.5 and patent name "A fireproof cable", it includes an outermost tubular rubber flame-retardant layer, three arc-shaped fireproof panels located inside the rubber flame-retardant layer and arranged in a triangle, and three cable cores located in the middle of the three arc-shaped fireproof panels, and the three cable cores are arranged in a triangle, the arc-shaped fireproof panels are bent toward the rotation center of the rubber flame-retardant layer, the arc-shaped fireproof panels are arranged in a triangle and form a first cavity with a triangular interior, and each arc-shaped fireproof panel and the rubber flame-retardant layer are enclosed to form a second cavity; the second cavity is filled with water, and the first cavity is filled with mixed sand and cement, and the cable core is protected by the rubber flame-retardant layer and the arc-shaped fireproof panels; the sand and cement in the first cavity solidify when they meet water, thereby achieving secondary protection of the fireproof cable, but the above-mentioned technical problems are not solved. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a fireproof cable and its components to solve the problem that when a fire occurs, the fireproof cable can only work normally for a short time due to the high temperature.

[0005] Based on the above purpose, the present invention provides a fireproof cable, comprising a low-smoke halogen-free outer sheath, a plurality of twisted copper conductors arranged in the low-smoke halogen-free outer sheath, an insulating layer coated on the outside of the twisted copper conductors, and a filler filled in the low-smoke halogen-free outer sheath, and the fireproof cable also includes:

[0006] An inner conduit and an outer conduit are arranged in the low-smoke zero-halogen outer sheath, a plurality of the stranded copper conductors are located in the inner conduit, the inner conduit is arranged in the outer conduit, and a conveying channel is formed between the outer surface of the inner conduit and the inner surface of the outer conduit;

[0007] A plurality of connecting rods are arranged in the delivery channel, one end of each connecting rod is fixed to the outer surface of the inner conduit, and the other end of each connecting rod is fixed to the inner surface of the outer conduit;

[0008] A pipe plug, a plurality of branch pipes arranged on the outer surface of the low-smoke zero-halogen outer sheath; one end of the branch pipe is connected to the conveying channel, and the pipe plug is used to seal the opening of the branch pipe;

[0009] A plurality of extension tubes are arranged on the outer surface of the outer conduit, the extension tubes extend into the filling material, and the extension tubes are connected with the conveying channel through guide holes arranged on the outer surface of the outer conduit;

[0010] An opening and closing portion is arranged in the extension tube, and is used to close or open the extension tube.

[0011] Furthermore, the opening and closing part includes: a sealing block slidably connected to the inside of the extension tube, a spring one end of which is fixedly connected to the bottom end surface of the sealing block, and the other end of the spring is fixed to the outer surface of the outer tube. When the sealing block is located in the extension tube, the spring is in a compressed state.

[0012] Here, when the filling material outside the outer conduit is burned, the sealing block loses its restraining force, so that under the elastic force of the spring, the sealing block will be bounced to the outside of the extension tube, and the water in the conveying channel will be sprayed out from the extension tube after passing through the guide hole.

[0013] Furthermore, the fireproof cable also includes:

[0014] Heat-conducting rod, the sealing block is provided with through holes penetrating the upper and lower end surfaces thereof, the heat-conducting rod is slidably connected to the through holes, the top of the heat-conducting rod extends to the outside of the low-smoke halogen-free outer sheath, the bottom of the heat-conducting rod extends into the conveying channel, the heat-conducting rod passes through the outer surface of the low-smoke halogen-free outer sheath and is fixedly connected to the low-smoke halogen-free outer sheath; the heat-conducting rod passes through the outer surface of the outer conduit and is fixedly connected to the outer conduit;

[0015] A plurality of heat dissipation leaves are arranged on the outer surface of the bottom of the heat conducting rod, and the heat dissipation leaves are located in the conveying channel.

[0016] Furthermore, the fireproof cable also includes:

[0017] A sealing ring, wherein the lower end surface of the sealing ring is provided with a circular groove, and the upper end surface of the sealing ring is provided with a plurality of circular arc grooves, wherein the circular arc grooves are connected to the circular ring grooves;

[0018] A sphere arranged in the circular arc groove, a guide tube whose bottom end is connected to the side surface of the sphere, the sphere is provided with a through hole penetrating the side surface thereof, and the through hole is respectively connected to the guide tube and the circular annular groove;

[0019] The connecting pipe allows a portion of the outer conduit and the inner conduit to remain outside during the process of connecting two fire-proof cables. When the corresponding twisted copper conductors in the two fire-proof cables are not connected, the sealing ring is placed at the opening of the transmission channel, and then the twisted copper conductors in the two fire-proof cables are connected together, and then the corresponding two guide tubes are connected through the connecting pipe.

[0020] Furthermore, the fireproof cable also includes:

[0021] An inner ring and an outer ring, wherein the outer diameter of the inner ring is equal to the inner diameter of the inner conduit, and the inner diameter of the outer ring is equal to the outer diameter of the outer conduit;

[0022] When the corresponding twisted copper conductors in the two fire-proof cables are not connected, place the inner ring near the edge of the inner conduit and put the outer ring near the edge of the outer conduit;

[0023] A fixing member, the fixing member is used to fix the inner ring to the inner surface of the inner conduit and simultaneously fix the outer ring to the outer surface of the outer conduit;

[0024] After the fixing member fixes the positions of the inner and outer rings, the sealing ring is placed at the opening of the conveying channel;

[0025] A stabilizing ring and a limiting portion for limiting the position of the stabilizing ring in the middle of the two sealing rings, wherein the outer surface of the stabilizing ring is provided with a plurality of open grooves;

[0026] The pushing part arranged in the open groove drives the front end of the guide tube to move a distance toward the middle of the stabilizing ring after the front ends of the two corresponding guide tubes placed in the open groove are connected through the connecting pipe.

[0027] Furthermore, the fixing member is a first screw rod, the outer ring is provided with a side hole penetrating its inner surface and outer surface, the outer side surface of the inner ring is provided with a first screw hole, the outer surface of the bottom of the first screw rod is provided with a first thread matching the first screw hole, the outer conduit is provided with an outer hole, the inner conduit is provided with an inner hole, the outer hole is opposite to the inner hole, and after the first screw rod passes through the side hole, the outer hole and the inner hole in sequence, the bottom of the first screw rod enters the interior of the first screw hole.

[0028] Furthermore, the limiting portion includes a hinged rod with one end hinged to the side surface of the inner ring, and a stabilizing plate with the side surface hinged to the other end of the hinged rod. After the stabilizing plate contacts the end surface of the stabilizing ring, the stabilizing plate is fixed to the end surface of the stabilizing ring by screws.

[0029] Furthermore, the pushing part includes:

[0030] A pressing plate, wherein the pressing plate is provided with surface holes penetrating the upper and lower surfaces thereof;

[0031] A second screw rod passes through the surface hole, and a second screw hole matching the second screw rod is provided at the bottom of the open groove;

[0032] Limit blocks symmetrically arranged on both sides of the second screw rod, wherein the limit blocks are fixed to the lower surface of the pressing plate;

[0033] A fixing block provided on the side surface of the top end of the guide tube;

[0034] After the fixing block abuts against the corresponding limiting block, the bottom of the second screw rod enters into the second screw hole, and the second screw rod is rotated by external force, so that the second screw rod moves a distance toward the center position of the stabilizing ring.

[0035] Furthermore, the fireproof cable also includes a sealing cover, which is used to seal the connection between two fireproof cables.

[0036] The present invention also provides a fireproof cable assembly, which includes a hydraulic pump, a water outlet pipe with one end connected to the outlet of the hydraulic pump, a water inlet pipe with one end connected to the inlet of the hydraulic pump, and a solenoid valve. When the fireproof cable as described above is used, the pipe plug on one of the branch pipes is removed, and the other end of the water outlet pipe is connected to the branch pipe; then the pipe plug on the other branch pipe is removed, and the solenoid valve is installed on the branch pipe; the other end of the water inlet pipe is connected to a water source.

[0037] Beneficial effects of the present invention: using a fireproof cable and its components of the present invention, when installing the fireproof cable, remove the pipe plug on one of the branch pipes, and connect the other end of the water outlet pipe to the branch pipe; then remove the pipe plug on the other branch pipe, and install the solenoid valve on the branch pipe; the other end of the water inlet pipe is connected to the water source, and the opening and closing part closes the extension pipe when no fire occurs. In the event of a fire, the hydraulic pump is started, and the solenoid valve opens the corresponding branch pipe, so that the water in the conveying channel flows continuously, thereby taking away the heat, so that the damage rate of the low-smoke halogen-free outer sheath will be greatly reduced, and the temperature rise rate of the stranded copper conductor will be greatly curbed. When the low-smoke halogen-free outer sheath is burned and the filler outside the outer conduit is melted, the opening and closing part opens the extension pipe, and the solenoid valve closes the corresponding branch pipe. At this time, the hydraulic pump also increases the power, so that the water in the conveying channel will be sprayed out from the extension pipe, thereby further delaying the trend of the fire damaging the fireproof cable. Therefore, through the present invention, in the event of a fire, the time for the fireproof cable to work normally can be effectively increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 is a front cross-sectional view of an embodiment of the present invention;

[0040] Figure 2 is a side sectional view of an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of the heat conducting rod in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the connection of two fireproof cables in an embodiment of the present invention;

[0043] Figure 5 It is a partial schematic diagram of a stabilizing ring in an embodiment of the present invention;

[0044] Figure 6 It is a partial schematic diagram of the first screw in an embodiment of the present invention;

[0045] Figure 7 It is a front cross-sectional view of the outer ring and the inner ring in the embodiment of the present invention;

[0046] Figure 8 is a front view of a sealing ring in an embodiment of the present invention;

[0047] Fig. 9 Schematic diagram of the connection between the hydraulic pump and the fireproof cable in an embodiment of the present invention.

[0048] The markings in the figure are:

[0049] 1. Low smoke zero halogen outer sheath; 2. Filling material; 3. Insulation layer; 4. Twisted copper conductor; 5. Inner conduit; 6. Outer conduit; 7. Connecting rod; 8. Extension tube; 9. Branch tube; 11. Pipe plug; 12. Block; 13. Guide hole; 14. Spring; 15. Heat conducting rod; 16. Perforation; 17. Heat dissipation leaf; 18. Sealing cover; 19. Outer ring; 20. Inner ring; 21. Stabilizing ring; 22. Guide tube ; 23. Articulated rod; 24. First screw rod; 25. Stabilizing plate; 26. Second screw hole; 27. Open groove; 28. Pressing plate; 29. ​​Second screw rod; 30. Sealing ring; 31. Circular ring groove; 32. Round ball; 33. Through hole; 34. Circular arc groove; 35. Side hole; 36. First screw hole; 37. Outer hole; 38. Inner hole; 39. Connecting pipe; 40. Limit block; 41. Fixing block; 42. Hydraulic pump. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0051] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0052] In a first aspect of the present invention, a fireproof cable is provided, such as Figure 1 , Figure 2 As shown, the fire-resistant cable comprises a low-smoke halogen-free outer sheath 1, a plurality of twisted copper conductors 4 arranged in the low-smoke halogen-free outer sheath 1, an insulating layer 3 coated on the outside of the twisted copper conductor 4, and a filler 2 filled in the low-smoke halogen-free outer sheath 1. The fire-resistant cable also comprises:

[0053] An inner conduit 5 and an outer conduit 6 are arranged in the low-smoke zero-halogen outer sheath 1, a plurality of the stranded copper conductors 4 are located in the inner conduit 5, the inner conduit 5 is arranged in the outer conduit 6, and a conveying channel is formed between the outer surface of the inner conduit 5 and the inner surface of the outer conduit 6;

[0054] A plurality of connecting rods 7 are arranged in the conveying channel, one end of the connecting rod 7 is fixed to the outer surface of the inner conduit 5, and the other end of the connecting rod 7 is fixed to the inner surface of the outer conduit 6;

[0055] A pipe plug 11, a plurality of branch pipes 9 arranged on the outer surface of the low-smoke zero-halogen outer sheath 1; one end of the branch pipe 9 is connected to the conveying channel, and the pipe plug 11 is used to seal the opening of the branch pipe 9;

[0056] A plurality of extension tubes 8 are arranged on the outer surface of the outer conduit 6, wherein the extension tubes 8 extend into the filling material 2, and the extension tubes 8 are connected to the conveying channel through guide holes 13 arranged on the outer surface of the outer conduit 6;

[0057] The opening and closing portion is provided in the extension tube 8 and is used to close or open the extension tube 8 .

[0058] In addition, if Fig. 9 As shown, a fireproof cable assembly is introduced. When installing the fireproof cable, the pipe plug 11 on one of the branch pipes 9 is removed, and the other end of the water outlet pipe is connected to the branch pipe 9; then the pipe plug 11 on the other branch pipe 9 is removed, and the solenoid valve is installed on the branch pipe 9; the other end of the water inlet pipe is connected to the water source, and the opening and closing part closes the extension pipe 8 when no fire occurs.

[0059] Therefore, in this embodiment, when a fire occurs, the hydraulic pump 42 is started, and the electromagnetic valve opens the corresponding branch pipe 9, so that the water in the conveying channel flows continuously, thereby taking away the heat, so that the damage rate of the low-smoke zero-halogen outer sheath 1 will be greatly reduced, and the temperature rise rate of the stranded copper conductor 4 will be greatly curbed. When the low-smoke zero-halogen outer sheath 1 is burned, and the filler 2 outside the outer conduit 6 is also melted, the opening and closing part opens the extension pipe 8, and the electromagnetic valve closes the corresponding branch pipe 9. At this time, the hydraulic pump 42 also increases the power, so that the water in the conveying channel will be ejected from the extension pipe 8, thereby further delaying the trend of the fire destroying the fireproof cable. Therefore, through the present invention, when a fire occurs, the time for the fireproof cable to work normally can be effectively increased.

[0060] As an implementation method, Figure 3 As shown, the opening and closing portion includes: a sealing block 12 slidably connected to the inside of the extension tube 8, a spring 14 one end of which is fixedly connected to the bottom end surface of the sealing block 12, and the other end of the spring 14 is fixed to the outer surface of the outer guide tube 6. When the sealing block 12 is located in the extension tube 8, the spring 14 is in a compressed state.

[0061] In this embodiment, when the filling material 2 outside the outer conduit 6 is burned, the sealing block 12 loses its restraining force. In this way, under the elastic force of the spring 14, the sealing block 12 will be bounced to the outside of the extension tube 8, and the water in the conveying channel will be sprayed out from the extension tube 8 after passing through the guide hole 13.

[0062] As an implementation method, Figure 3 As shown, the fire-resistant cable also includes:

[0063] The heat-conducting rod 15, the sealing block 12 is provided with a through hole 16 penetrating the upper and lower end surfaces thereof, the heat-conducting rod 15 is slidably connected to the through hole 16, the top of the heat-conducting rod 15 extends to the outside of the low-smoke zero-halogen outer sheath 1, and the bottom of the heat-conducting rod 15 extends into the conveying channel, the heat-conducting rod 15 passes through the outer surface of the low-smoke zero-halogen outer sheath 1 and is fixedly connected to the low-smoke zero-halogen outer sheath 1; the heat-conducting rod 15 passes through the outer surface of the outer conduit 6 and is fixedly connected to the outer conduit 6;

[0064] A plurality of heat dissipation blades 17 are arranged on the outer surface of the bottom of the heat conducting rod 15 , and the heat dissipation blades 17 are located in the conveying channel.

[0065] In this embodiment, when the smokeless low-halogen outer sheath is not damaged by fire, external heat will enter the conveying channel through the heat conducting rod 15, and then be absorbed by the moisture in the conveying channel, which can further delay the damage of the smokeless low-halogen outer sheath, and the heat dissipation leaves 17 can increase the contact area with the water in the conveying channel.

[0066] As an implementation method, Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the fire-resistant cable also includes:

[0067] A sealing ring 30, wherein a circular groove 31 is provided on the lower end surface of the sealing ring 30, and a plurality of circular arc grooves 34 are provided on the upper end surface of the sealing ring 30, wherein the circular arc grooves 34 are connected to the circular groove 31;

[0068] A ball 32 is arranged in the arc groove 34, a guide tube 22 whose bottom end is connected to the side surface of the ball 32, and a connecting tube 39. The ball 32 is provided with a through hole 33 penetrating its side surface, and the through hole 33 is connected to the guide tube 22 and the annular groove 31 respectively.

[0069] In this embodiment, when two fireproof cables need to be connected together to form a complete fireproof cable, a portion of the outer conduit 6 and the inner conduit 5 are retained outside, and when the corresponding twisted copper conductors 4 in the two fireproof cables are not connected, the sealing ring 30 is placed at the opening of the transmission channel, and then the twisted copper conductors 4 in the two fireproof cables are connected together, and then the corresponding two guide tubes 22 are connected through the connecting tube 39, so that the two transmission channels can be connected. Here, the connecting tube 39 is preferably a corrugated metal tube. In the event of a fire, the water flowing in the guide tube 22 can cool the connection between the twisted copper conductors 4 in the two fireproof cables.

[0070] As an implementation method, Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the fire-resistant cable also includes:

[0071] An inner ring 20 and an outer ring 19, wherein the outer diameter of the inner ring 20 is equal to the inner diameter of the inner conduit 5, and the inner diameter of the outer ring 19 is equal to the outer diameter of the outer conduit 6;

[0072] When the corresponding twisted copper conductors 4 in the two fireproof cables are not connected, the inner ring 20 is placed in the inner conduit 5 near the edge, and the outer ring 19 is placed in the outer conduit 6 near the edge;

[0073] A fixing member, which is used to fix the inner ring 20 to the inner surface of the inner conduit 5 and simultaneously fix the outer ring 19 to the outer surface of the outer conduit 6;

[0074] A stabilizing ring 21 and a limiting portion for limiting the position of the stabilizing ring 21 in the middle of the two sealing rings 30, wherein the outer surface of the stabilizing ring 21 is provided with a plurality of opening grooves 27;

[0075] The pushing portion disposed in the open groove 27 drives the front ends of the guide tubes 22 to move a certain distance toward the middle of the stabilizing ring 21 after connecting the front ends of the two corresponding guide tubes 22 placed in the open groove 27 through the connecting tube 39 .

[0076] In this embodiment, after the fixing member fixes the positions of the inner ring 20 and the outer ring 19, the sealing ring 30 is placed at the opening of the conveying channel, and then the twisted copper conductor 4 is passed through the stabilizing ring 21, and then the position of the stabilizing ring 21 is limited to the middle of the two sealing rings 30 through the limiting portion. After completion, after connecting the front ends of the two corresponding guide tubes 22 placed in the opening groove 27 through the connecting tube 39, the pushing portion drives the front end of the guide tube 22 to move a distance toward the middle of the stabilizing ring 21, thereby applying external force to the sealing ring 30 through the guide tube 22 to ensure that the sealing ring 30 can be stably maintained in the opening of the conveying channel.

[0077] As an implementation method, Figure 6 , Figure 7 As shown, the fixing member is a first screw rod 24, the outer ring 19 is provided with a side hole 35 penetrating the inner and outer surfaces thereof, the outer side surface of the inner ring 20 is provided with a first screw hole 36, the outer surface of the bottom of the first screw rod 24 is provided with a first thread matching the first screw hole 36, the outer conduit 6 is provided with an outer hole 37, the inner conduit 5 is provided with an inner hole 38, the outer hole 37 is opposite to the inner hole 38, and after the first screw rod 24 passes through the side hole 35, the outer hole 37 and the inner hole 38 in sequence, the bottom of the first screw rod 24 enters the interior of the first screw hole 36.

[0078] As an implementation method, Figure 5 As shown, the limiting portion includes a hinged rod 23 with one end hinged to the side surface of the inner ring 20, and a stabilizing plate 25 with the side surface hinged to the other end of the hinged rod 23. After the stabilizing plate 25 contacts the end surface of the stabilizing ring 21, the stabilizing plate 25 is fixed to the end surface of the stabilizing ring 21 by screws.

[0079] As an implementation method, Figure 5 As shown, the pushing portion includes:

[0080] A pressing plate 28, wherein the pressing plate 28 is provided with surface holes penetrating the upper and lower surfaces thereof;

[0081] A second screw rod 29 passes through the surface hole, and a second screw hole 26 matching the second screw rod 29 is provided at the bottom of the opening slot 27;

[0082] The limit blocks 40 are symmetrically arranged on both sides of the second screw rod 29, and the limit blocks 40 are fixed to the lower surface of the pressing plate 28;

[0083] A fixing block 41 is provided on the front end side surface of the guide tube 22 .

[0084] In this embodiment, after the fixing block 41 abuts against the corresponding limiting block 40 , the bottom of the second screw rod 29 enters into the second screw hole 26 , and the second screw rod 29 is rotated by external force, so that the second screw rod 29 moves a distance toward the center position of the stabilizing ring 21 .

[0085] Here, preferably, Figure 4 As shown, the fireproof cable further comprises a sealing cover 18, and the sealing cover 18 is used to seal the connection between the two fireproof cables.

[0086] When the sealing ring 30 passes through the guide tube 22 and is fixed at the opening of the conveying channel, the connection between the two fireproof cables is sealed by the sealing cover 18, which is made of fire-resistant material.

[0087] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0088] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fireproof cable, comprising a low-smoke halogen-free outer sheath (1), a plurality of twisted copper conductors (4) arranged in the low-smoke halogen-free outer sheath (1), an insulating layer (3) coated on the outside of the twisted copper conductors (4), and a filler (2) filled in the low-smoke halogen-free outer sheath (1), characterized in that: The fireproof cable also includes: An inner conduit (5) and an outer conduit (6) are arranged in a low-smoke zero-halogen outer sheath (1), a plurality of the stranded copper conductors (4) are located in the inner conduit (5), the inner conduit (5) is arranged in the outer conduit (6), and a conveying channel is formed between the outer surface of the inner conduit (5) and the inner surface of the outer conduit (6); A plurality of connecting rods (7) are arranged in the conveying channel, one end of the connecting rod (7) is fixed to the outer surface of the inner conduit (5), and the other end of the connecting rod (7) is fixed to the inner surface of the outer conduit (6); A pipe plug (11), and a plurality of branch pipes (9) arranged on the outer surface of the low-smoke zero-halogen outer sheath (1); one end of the branch pipe (9) is connected to the conveying channel, and the pipe plug (11) is used to seal the opening of the branch pipe (9); A plurality of extension tubes (8) are arranged on the outer surface of the outer conduit (6), wherein the extension tubes (8) extend into the filling material (2), and the extension tubes (8) are connected to the conveying channel through guide holes (13) arranged on the outer surface of the outer conduit (6); an opening and closing portion disposed in the extension tube (8), the opening and closing portion being used to close or open the extension tube (8); The opening and closing portion comprises: a sealing block (12) slidably connected to the inside of the extension tube (8), a spring (14) one end of which is fixedly connected to the bottom end surface of the sealing block (12), and the other end of the spring (14) is fixed to the outer surface of the outer guide tube (6). When the sealing block (12) is located in the extension tube (8), the spring (14) is in a compressed state.

2. A fireproof cable according to claim 1, characterized in that: The fireproof cable also includes: A heat-conducting rod (15), the sealing block (12) is provided with a through hole (16) penetrating the upper and lower end surfaces thereof, the heat-conducting rod (15) is slidably connected to the through hole (16), the top of the heat-conducting rod (15) extends to the outside of the low-smoke zero-halogen outer sheath (1), the bottom of the heat-conducting rod (15) extends into the conveying channel, the heat-conducting rod (15) passes through the outer surface of the low-smoke zero-halogen outer sheath (1) and is fixedly connected to the low-smoke zero-halogen outer sheath (1); the heat-conducting rod (15) passes through the outer surface of the outer conduit (6) and is fixedly connected to the outer conduit (6); A plurality of heat dissipation leaves (17) are arranged on the outer surface of the bottom of the heat conducting rod (15), and the heat dissipation leaves (17) are located in the conveying channel.

3. A fireproof cable according to claim 2, characterized in that: The fireproof cable also includes: A sealing ring (30), wherein a circular groove (31) is provided on the lower end surface of the sealing ring (30), and a plurality of circular arc grooves (34) are provided on the upper end surface of the sealing ring (30), wherein the circular arc grooves (34) are connected to the circular grooves (31); A sphere (32) disposed in the circular arc groove (34), a guide tube (22) whose bottom end is connected to the side surface of the sphere (32), the sphere (32) being provided with a through hole (33) penetrating the side surface thereof, the through hole (33) being respectively connected to the guide tube (22) and the circular annular groove (31); The connecting tube (39) allows a portion of the outer conduit (6) and the inner conduit (5) to remain outside during the process of connecting the two fireproof cables. When the corresponding twisted copper conductors (4) in the two fireproof cables are not connected, the sealing ring (30) is placed at the opening of the conveying channel, and then the twisted copper conductors (4) in the two fireproof cables are connected together, and then the corresponding two guide tubes (22) are connected through the connecting tube (39).

4. A fireproof cable according to claim 3, characterized in that: The fireproof cable also includes: An inner ring (20) and an outer ring (19), wherein the outer diameter of the inner ring (20) is equal to the inner diameter of the inner conduit (5), and the inner diameter of the outer ring (19) is equal to the outer diameter of the outer conduit (6); When the corresponding twisted copper conductors (4) in the two fireproof cables are not connected, the inner ring (20) is placed in a position close to the edge of the inner conduit (5), and the outer ring (19) is placed in a position close to the edge of the outer conduit (6); A fixing member, the fixing member being used to fix the inner ring (20) on the inner surface of the inner conduit (5) and simultaneously fix the outer ring (19) on the outer surface of the outer conduit (6); After the fixing member fixes the positions of the inner ring (20) and the outer ring (19), the sealing ring (30) is placed at the opening of the conveying channel; A stabilizing ring (21), and a limiting portion for limiting the position of the stabilizing ring (21) in the middle of two sealing rings (30), wherein the outer surface of the stabilizing ring (21) is provided with a plurality of open grooves (27); The pushing portion disposed in the open groove (27) drives the front ends of the guide tubes (22) to move a certain distance toward the middle of the stabilizing ring (21) after the front ends of the two corresponding guide tubes (22) placed in the open groove (27) are connected via a connecting tube (39).

5. A fireproof cable according to claim 4, characterized in that: The fixing member is a first screw rod (24), the outer ring (19) is provided with a side hole (35) penetrating the inner and outer surfaces thereof, the outer side surface of the inner ring (20) is provided with a first screw hole (36), the outer surface of the bottom of the first screw rod (24) is provided with a first thread matching the first screw hole (36), the outer conduit (6) is provided with an outer hole (37), the inner conduit (5) is provided with an inner hole (38), the outer hole (37) is directly opposite to the inner hole (38), and after the first screw rod (24) passes through the side hole (35), the outer hole (37) and the inner hole (38) in sequence, the bottom of the first screw rod (24) enters the interior of the first screw hole (36).

6. A fireproof cable according to claim 5, characterized in that: The limiting portion comprises a hinged rod (23) having one end hinged to the side surface of the inner ring (20), and a stabilizing plate (25) having a side surface hinged to the other end of the hinged rod (23); after the stabilizing plate (25) contacts the end surface of the stabilizing ring (21), the stabilizing plate (25) is fixed to the end surface of the stabilizing ring (21) by means of screws.

7. A fireproof cable according to claim 6, characterized in that: The driving part comprises: A pressing plate (28), wherein the pressing plate (28) is provided with surface holes penetrating the upper and lower surfaces thereof; A second screw rod (29) passes through the surface hole, and a second screw hole (26) matching the second screw rod (29) is provided at the bottom of the open groove (27); Limit blocks (40) symmetrically arranged on both sides of the second screw rod (29), wherein the limit blocks (40) are fixed to the lower surface of the pressing plate (28); A fixing block (41) disposed on the top side surface of the guide tube (22); After the fixing block (41) abuts against the corresponding limiting block (40), the bottom of the second screw rod (29) enters the second screw hole (26), and the second screw rod (29) is rotated by external force, so that the second screw rod (29) moves a certain distance toward the center position of the stabilizing ring (21).

8. A fireproof cable according to claim 7, characterized in that: The fireproof cable also comprises a sealing cover (18), and the sealing cover (18) is used to seal the connection between two fireproof cables.

9. A fireproof cable assembly, using the fireproof cable according to any one of claims 1 to 8, characterized in that: The fireproof cable assembly comprises a hydraulic pump (42), a water outlet pipe having one end connected to the outlet of the hydraulic pump (42), a water inlet pipe having one end connected to the inlet of the hydraulic pump (42), and a solenoid valve. The pipe plug (11) on one of the branch pipes (9) is removed, and the other end of the water outlet pipe is connected to the branch pipe (9); the pipe plug (11) on the other branch pipe (9) is removed, and the solenoid valve is installed on the branch pipe (9); the other end of the water inlet pipe is connected to a water source.

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