CN221225875U - Multi-core fire-resistant cable - Google Patents
Multi-core fire-resistant cable Download PDFInfo
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- CN221225875U CN221225875U CN202322975046.2U CN202322975046U CN221225875U CN 221225875 U CN221225875 U CN 221225875U CN 202322975046 U CN202322975046 U CN 202322975046U CN 221225875 U CN221225875 U CN 221225875U
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- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 109
- 239000003063 flame retardant Substances 0.000 claims abstract description 42
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004020 conductor Substances 0.000 claims abstract description 25
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 239000011241 protective layer Substances 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims description 19
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 10
- 239000000347 magnesium hydroxide Substances 0.000 claims description 10
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 9
- -1 polypropylene Polymers 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 8
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 8
- 239000001095 magnesium carbonate Substances 0.000 claims description 8
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 8
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 7
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 7
- 229920006254 polymer film Polymers 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 239000000779 smoke Substances 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 8
- 210000001503 joint Anatomy 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model relates to the technical field of fire-resistant cables and discloses a multi-core fire-resistant cable, which comprises an outer protective layer and an outer joint, wherein a heat insulation assembly is arranged on the inner wall of the outer protective layer, a heat insulation layer is fixedly connected to the inner wall of the outer protective layer, a plurality of insulating layers are arranged on the inner wall of the heat insulation layer, a shielding layer is fixedly connected to the inner wall of the insulating layer, a conductor is fixedly connected to the inner wall of the shielding layer, a flame-retardant layer is arranged on the inner wall of the heat insulation layer, and a quick-connection assembly is arranged on the right side of the outer protective layer. According to the utility model, the overall fire resistance can be improved, the power transmission of the cable can be ensured under severe conditions, the comprehensive safety is improved, the smoke and harmful gas generated by the cable in a high-temperature state can be reduced, the fire resistance and the protection capability of the cable are improved through the addition of the flame retardant, the butt joint installation speed of the cable is improved while the tightness and the shielding functionality are ensured, and the installation efficiency is effectively improved.
Description
Technical Field
The utility model relates to the technical field of fire-resistant cables, in particular to a multi-core fire-resistant cable.
Background
Cables are used in power systems for transmission and distribution of electrical energy from a power station or substation to a user terminal. They play an important role in the transmission, distribution lines, transformers and substations of the power grid and, during use, the cables are divided into single-core cables and multi-core cables, wherein the multi-core cables can be used for simultaneous transmission of multiple power. In many applications, it is desirable to deliver power from a power station, substation or power source to individual consumers or systems. The multi-core design allows for bundling cables of different power lines or voltage classes, reducing installation complexity and space occupation.
The existing part of multi-core cable generally increases a plurality of insulating layers to the outside of multi-core wire when using, in order to control cable cost, the insulating layer that uses generally adopts polyvinyl chloride mixed material to make, but when the high temperature abominable condition such as conflagration appears in cable service environment, lead to the cable wire to expose because of the insulating layer melts easily to reduce whole safety in utilization.
Disclosure of utility model
In order to make up for the defects, the utility model provides a multi-core fireproof cable, which aims to solve the problems of poor fireproof performance and low safety in the use process of part of cables in the prior art, and the problems of complicated operation steps and poor installation efficiency because special tools are required to be used for fixing the cables when the cables are connected.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a multicore fire-resistant cable, includes outer sheath, external connection, the inner wall of outer sheath is provided with thermal-insulated subassembly, the inner wall fixedly connected with insulating layer of outer sheath, the inner wall of insulating layer is provided with a plurality of insulating layers, the inner wall fixedly connected with shielding layer of insulating layer, the inner wall fixedly connected with conductor of shielding layer, the inner wall of insulating layer is provided with fire-retardant layer, the inner wall of fire-retardant layer is provided with the filling layer, the right side of outer sheath is provided with connects the subassembly soon.
Further, through the combination of the structures, the multi-core fireproof cable achieves multiple protection effects. The outer sheath provides physical protection, the heat insulation assembly and the heat insulation layer provide heat insulation performance, the flame retardant assembly increases flame retardant performance, the plurality of insulating layers provide electrical insulation, the shielding layer controls electromagnetic and external interference, and the conductor is responsible for current and signal transmission. The structure can reduce heat conduction and flame spreading speed when fire disaster occurs, effectively protect the internal components of the cable from being influenced by overheat and fire disaster, improve the fire resistance and reliability of the cable, reduce toxic smoke generation when the temperature is too high through the cooperation of the flame retardant layer and the filling layer, form a layer of protection on the outer wall of the cable, and reduce high heat conduction to the internal conductor.
As a further description of the above technical solution:
the quick-connection assembly comprises a fixed ring, the fixed ring is fixedly connected to the right side of the outer wall of the outer protective layer, a plurality of positioning blocks are fixedly connected to the right side of the outer wall of the fixed ring, a shielding groove is formed in the middle of the inner wall of the fixed ring, a sealing groove is formed in the right side of the fixed ring, a pull rod is connected to the left side of the positioning block in a sliding manner, a supporting rod is connected to the right side of the pull rod in a rotating manner, a locking rod is connected to the right side of the supporting rod in a rotating manner, springs are arranged on the far side of the inner wall of the positioning block, a plurality of bearing blocks are fixedly connected to the outer wall of the outer joint, an extension plate is fixedly connected to the left side of the bearing blocks, a waterproof ring is fixedly connected to the left side of the outer joint, and a shielding plate is fixedly connected to the inner wall of the waterproof ring.
Further, through the combination of solid fixed ring, locating piece, shielding groove, shielding board, seal groove, waterproof ring, pull rod, branch, locking lever, extension board and spring, can effectively ensure the accuracy and the stability of connection, prevent the skew and the not hard up of extension board and locating piece junction portion to thereby realize the quick loading and unloading function to cable connection through promoting the pull rod.
As a further description of the above technical solution:
The extending plate is connected to the right side of the positioning block in a sliding mode, and the locking rod is connected to the top of the extending plate in a sliding mode.
Furthermore, through the design of the lock rod, the position of the extension plate inserted into the positioning block can be limited, so that the connection locking is ensured.
As a further description of the above technical solution:
the spring is arranged on the far side of the lock rods, and the lock rods are connected to the inner wall of the positioning block in a sliding mode.
Further, the spring position and the position of the lock rod in the positioning block are limited, so that the lock rod can be driven to move up and down under the action force of the support rod.
As a further description of the above technical solution:
The shielding plate is connected to the inner wall of the shielding groove in a sliding mode, and the waterproof ring is connected to the inner wall of the sealing groove in a sliding mode.
Further, by the connection of the shield plate and the shield groove, and the waterproof ring and the seal groove, the protection effect against foreign water and electromagnetic waves in the tightly connected state can be achieved.
As a further description of the above technical solution:
The insulating layer is a crosslinked polyethylene shell, the shielding layer is an aluminum foil and polymer film composite shell, and the outer protective layer is a flame-retardant polypropylene shell.
Further, by using the crosslinked polyethylene as the insulating layer material, good electrical insulating performance and ageing resistance can be provided, and the aluminum foil and polymer film composite material is used as the shielding layer, so that the influence of electromagnetic interference on the cable can be effectively reduced, the integrity of signal transmission is protected, and the flame-retardant polypropylene shell is used as the appearance protection, so that the fire risk can be reduced, meanwhile, the components inside the cable are protected, and the reliable operation of the cable under various conditions is ensured.
As a further description of the above technical solution:
The filling layer can be filled by magnesium carbonate cement material, the heat insulation layer is a silicon carbide fiber material shell, and the magnesium hydroxide flame retardant is filled in the flame retardant layer.
Further, the magnesium carbonate cement can undergo a curing reaction after contacting water, so that the protection of components such as an inner conductor, a shielding layer and the like is improved, and the silicon carbide fiber material is used as a shell of the heat insulation layer, so that the effective heat insulation protection of high temperature can be realized, and the heat loss and the heat influence are reduced. Meanwhile, the cable has the characteristics of good fire resistance, light weight, flexibility and the like, and provides reliable performance and operation convenience for the cable. The structure can improve the fire resistance of the cable, protect the internal components of the cable from high temperature and fire, improve the reliability and safety of the cable, release water vapor after encountering a high temperature state, and realize the curing protection effect by matching with the magnesium carbonate cement filling layer.
As a further description of the above technical solution:
A plurality of conductors are symmetrically arranged at the center of the filling layer.
Further, the conductor placement and installation stability is improved, so that the filling layer can protect a plurality of multi-core conductors at the same time.
The utility model has the following beneficial effects:
1. According to the utility model, through the matching use of the parts such as the outer protective layer, the heat insulating layer, the insulating layer and the shielding layer, the overall fire resistance can be improved, the power transmission of the cable can be ensured under severe conditions, the comprehensive safety is improved, the smoke and harmful gas generated by the cable in a high-temperature state can be reduced, and the fire resistance and the protection capability of the cable are improved through the addition of the flame retardant.
2. According to the utility model, through the matched use of the parts such as the outer joint, the shielding groove, the pull rod, the spring, the supporting rod and the like, the cable butt joint installation speed is improved and the installation efficiency is effectively improved while the tightness and the shielding functionality are ensured.
Drawings
Fig. 1 is a schematic perspective view of a multi-core fire-resistant cable according to the present utility model;
Fig. 2 is a schematic diagram of the outer sheath structure of the multi-core fire-resistant cable according to the present utility model;
FIG. 3 is a schematic diagram of a cross-sectional structure of a multi-core fire-resistant cable according to the present utility model;
FIG. 4 is an exploded view of a retaining ring structure of a multi-core fire resistant cable according to the present utility model;
FIG. 5 is a schematic view of a part of the outer joint structure of the multi-core fire-resistant cable according to the present utility model;
Fig. 6 is a schematic cross-sectional view of a positioning block structure of the multi-core fire-resistant cable according to the present utility model.
Legend description:
1. An outer protective layer; 2. a thermal insulation layer; 3. an insulating layer; 4. a shielding layer; 5. a conductor; 6. a filling layer; 7. a flame retardant layer; 8. a fixing ring; 9. a positioning block; 10. sealing grooves; 11. a shielding groove; 12. a pull rod; 13. a support rod; 14. a spring; 15. a lock lever; 16. an outer joint; 17. a bearing block; 18. an extension plate; 19. a waterproof ring; 20. and a shielding plate.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, a first embodiment provided by the present utility model: the utility model provides a multicore fire-resistant cable, including outer sheath 1, outer joint 16, the inner wall of outer sheath 1 is provided with thermal-insulated subassembly, the inner wall fixedly connected with insulating layer 2 of outer sheath 1, the inner wall of insulating layer 2 is provided with a plurality of insulating layers 3, the inner wall fixedly connected with shielding layer 4 of insulating layer 3, the inner wall fixedly connected with conductor 5 of shielding layer 4, the inner wall of insulating layer 2 is provided with fire-retardant layer 7, the inner wall of fire-retardant layer 7 is provided with filling layer 6, the right side of outer sheath 1 is provided with connects the subassembly soon.
Specifically, when the multi-core fireproof cable encounters a severe high-temperature environment in the use process, the flame-retardant polypropylene material shell used by the outer protective layer 1 can self-extinguish when encountering a fire source and does not continue burning or dripping flame, so that the possibility of fire spreading is reduced, meanwhile, the flame-retardant polypropylene material shell can provide an additional electric insulating layer 3, effectively isolate the inner wire and the outer environment of the cable, prevent current leakage or interference, ensure electric safety, the heat insulating layer 2 is used for isolating and preventing heat transfer, can reduce the heat conduction of an external heat source to the cable, and a plurality of insulating layers 3 wrap each conductor 5, are used for preventing short circuit of current between the conductors 5 and providing electric insulation, and adopt crosslinked polyethylene materials, have good electric insulation and heat resistance, and in the use process of the cable, the conductors 5 are parts for transmitting current, can be tightly adhered to the inner wall of the shielding layer 4 through the extrusion of the filling layer 6 and are responsible for transmitting the current from the power source to a load, and the fireproof performance of the cable can be effectively improved through such design, and the power transmission stability of the cable is ensured.
Referring to fig. 1-2, the insulating layer 3 is a crosslinked polyethylene shell, and the shielding layer 4 is an aluminum foil and polymer film composite shell.
Specifically, the crosslinked polyethylene material is a material having high insulation properties, and is used as the insulating layer 3 in the cable. Has very low conductivity, can well isolate the current conductor 5, and prevents current leakage and short circuit. The insulating layer 3 can provide the electrical insulation required for the cable, protecting the electrical isolation between the conductors 5 of the cable and the surrounding environment, while the shielding layer 4 has good electromagnetic shielding properties by using aluminium foil, and can withstand the invasion of external electromagnetic interference, thereby limiting or preventing the influence of electromagnetic radiation on the signals in the cable by reflecting and absorbing the energy of the electromagnetic field. The polymer film provides protection and cushioning, increasing the flexibility and mechanical strength of the shielding layer 4.
Referring to fig. 1-2, the outer sheath 1 is a flame retardant polypropylene shell. The heat insulation layer 2 is a shell made of silicon carbide fiber.
Specifically, multiple protective effects can be provided by the flame retardancy of the outer sheath 1 and the heat insulation property of the heat insulating layer 2. Flame retardant polypropylene material shell can prevent the diffusion and the extension of flame, and carborundum fibre material shell then can slow down heat transmission, keeps apart the heat in the outside, and structure and equipment that protect inside are not influenced by the overheating.
Referring to fig. 3, a second embodiment of the present utility model is provided: the flame retardant assembly comprises a flame retardant layer 7, wherein the flame retardant layer 7 is fixedly connected to the inner wall of the heat insulation layer 2, and a filling layer 6 is arranged on the inner wall of the flame retardant layer 7.
Specifically, in order to reduce the generation of smoke and toxic gas, the magnesium hydroxide flame retardant in the insulating layer 3 releases moisture in the thermal decomposition process to absorb heat and cool the surrounding environment, and in addition, the high melting point and thermal stability of the magnesium hydroxide flame retardant also help to reduce the generation of smoke, block the propagation of flame, reduce the generation of combustion products, thereby reducing the quantity and concentration of smoke, and when the magnesium hydroxide flame retardant is released, the magnesium carbonate cement can be matched with the filling layer 6 to form a protective shell, thereby greatly reducing the overheat influence on the shielding layer 4, the conductor 5 and other components.
Referring to fig. 3, the filling layer 6 may be filled with a magnesium carbonate cement material, and the inside of the flame retardant layer 7 is filled with a magnesium hydroxide flame retardant.
Specifically, by filling the magnesium carbonate cement in the filling layer 6 and releasing the magnesium hydroxide flame retardant in the flame retardant layer 7, a comprehensive flame retardant and heat insulating layer 2 can be formed, the influence of fire on the inside and other parts of the fire retardant and the heat insulating layer can be effectively reduced, and a durable barrier can be provided.
Referring to fig. 3, a plurality of conductors 5 are installed in the center of the filler layer 6 symmetrically.
Specifically, the balanced structure of the cable is maintained by central symmetry installation.
Referring to fig. 4-6, the quick-connection assembly comprises a fixed ring 8, the fixed ring 8 is fixedly connected to the right side of the outer wall of the outer protective layer 1, a plurality of positioning blocks 9 are fixedly connected to the right side of the outer wall of the fixed ring 8, a shielding groove 11 is formed in the middle of the inner wall of the fixed ring 8, a sealing groove 10 is formed in the right side of the fixed ring 8, a pull rod 12 is connected to the left side of the positioning blocks 9 in a sliding manner, a supporting rod 13 is rotatably connected to the right side of the pull rod 12, a locking rod 15 is rotatably connected to the right side of the supporting rod 13, springs 14 are arranged on the far side of the inner walls of the plurality of positioning blocks 9, a plurality of bearing blocks 17 are fixedly connected to the outer wall of the outer joint 16, an extension plate 18 is fixedly connected to the left side of the bearing blocks 17, a waterproof ring 19 is fixedly connected to the left side of the outer joint 16, and a shielding plate 20 is fixedly connected to the inner wall of the waterproof ring 19.
Specifically, a plurality of connecting conductors 5 inside the outer joint 16 are aligned to the middle part of the fixed ring 8 to be preset in the groove, then in the pushing and combining process, the bearing block 17 is in sliding connection with the positioning block 9, meanwhile, the extending plate 18 can be smoothly inserted into the right side groove of the positioning block 9, after the extending plate 18 is clamped into the positioning block 9, the locking rod 15 is pushed by the spring 14 to lock the position of the extending plate 18, after the locking is completed, the shielding plate 20 and the waterproof ring 19 synchronously slide into the shielding groove 11 and the sealing groove 10, and the sealing after the connection and the locking are realized and the interference influence of external electromagnetic signals on an internal cable is prevented. And when the staff needs the change joint to change and connect, the staff passes through push rod 12 to through the produced lever principle of branch 13, make locking lever 15 lift, thereby cancel the locking to a plurality of extension boards 18 in step, the staff can take out extension board 18 this moment, changes outer joint 16, has realized the function of cable quick assembly disassembly connection through such design, and can be all the time to the waterproof protection ability of internal connection point at the connection in-process.
Referring to fig. 4, the extension plate 18 is slidably coupled to the right side of the positioning block 9, and the locking lever 15 is slidably coupled to the top of the extension plate 18.
Specifically, when the outer connector 16 drives the cable on the other side to connect, the extension plate 18 is locked in the positioning block 9, and then the position is locked by the lock rod 15.
Referring to fig. 6, the springs 14 are disposed at the far sides of the plurality of locking bars 15, and the locking bars 15 are slidably coupled to the inner walls of the positioning blocks 9.
Specifically, one side position of the spring 14 is limited, so that the lock rod 15 can be pushed by the spring 14 to perform shrinkage movement under the limit of the inner wall of the positioning block 9.
Referring to fig. 4 to 5, the shield plate 20 is slidably coupled to the inner wall of the shield groove 11, and the waterproof ring 19 is slidably coupled to the inner wall of the seal groove 10.
Specifically, by such a design, the shield performance can be improved by the connection between the shield plate 20 and the shield groove 11 in the tight connection state, and the water-repellent performance can be improved by the connection between the water-repellent ring 19 and the seal groove 10.
Working principle: when the multi-core fireproof cable encounters a severe high-temperature environment in the use process, firstly, the flame-retardant polypropylene material shell used by the outer protective layer 1 can self-extinguish when encountering a fire source, and does not continue burning or dripping flame, so that the possibility of fire spreading is reduced, meanwhile, the flame-retardant polypropylene material shell can provide an additional electric insulating layer 3, effectively isolate the inner wires of the cable from the external environment, prevent current leakage or interference, ensure electric safety, the heat insulating layer 2 is used for isolating and preventing heat transfer, and can reduce the heat conduction of an external heat source to the cable, and a plurality of insulating layers 3 wrap each conductor 5, are used for preventing short circuits of current between the conductors 5 and providing electric insulation, and adopt cross-linked polyethylene materials, and have good electric insulation and heat resistance;
In order to reduce the generation of smoke and toxic gases, the magnesium hydroxide flame retardant in the insulating layer 3 releases water in the thermal decomposition process to absorb heat and cool the surrounding environment, and in addition, the high melting point and thermal stability of the magnesium hydroxide flame retardant are also conducive to reducing the generation of smoke, blocking the propagation of flame, reducing the generation of combustion products, reducing the quantity and concentration of smoke, and when the magnesium hydroxide flame retardant is released, a protective shell is formed by matching with the filling layer 6 made of magnesium carbonate cement, so that the overheat influence on the shielding layer 4, the conductor 5 and other components is greatly reduced;
In the use process of the cable, the conductor 5 is a current transmission part, can be tightly attached to the inner wall of the shielding layer 4 through the extrusion of the filling layer 6 and is responsible for transmitting the current from a power supply to a load, and the fire resistance of the cable can be effectively improved through the design, so that the power transmission stability of the cable is ensured;
When the worker needs to butt-joint and install cables, the worker can align a plurality of connecting conductors 5 inside the outer connector 16 with the middle preset groove of the fixed ring 8, then in the pushing and combining process, the bearing block 17 is in sliding connection with the positioning block 9, meanwhile, the extending plate 18 can be smoothly inserted into the right side groove of the positioning block 9, after the extending plate 18 is clamped into the positioning block 9, the locking of the extending plate 18 can be completed by pushing the locking rod 15 through the spring 14, after the locking is completed, the shielding plate 20 and the waterproof ring 19 synchronously slide into the shielding groove 11 and the sealing groove 10, the sealing after the locking is realized, the interference influence of external electromagnetic signals on the inner cables is prevented, when the worker needs to change and connect the switching connector, the worker can lift the locking rod 15 through the lever principle generated by pushing the supporting rod 13, and thus the locking of the extending plate 18 can be synchronously canceled, at the moment, the worker can take out the extending plate 18, and the connector 16 is replaced.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (8)
1. The utility model provides a multicore fire-resistant cable, includes outer sheath (1), external joint (16), its characterized in that: the inner wall of outer sheath (1) is provided with thermal-insulated subassembly, the inner wall fixedly connected with insulating layer (2) of outer sheath (1), the inner wall of insulating layer (2) is provided with a plurality of insulating layers (3), the inner wall fixedly connected with shielding layer (4) of insulating layer (3), the inner wall fixedly connected with conductor (5) of shielding layer (4), the inner wall of insulating layer (2) is provided with fire-retardant layer (7), the inner wall of fire-retardant layer (7) is provided with filling layer (6), the right side of outer sheath (1) is provided with connects the subassembly soon.
2. The multi-core fire resistant cable according to claim 1, characterized in that: the quick-connection assembly comprises a fixed ring (8), the fixed ring (8) is fixedly connected to the right side of the outer wall of the outer protective layer (1), a plurality of positioning blocks (9) are fixedly connected to the right side of the outer wall of the fixed ring (8), a shielding groove (11) is formed in the middle of the inner wall of the fixed ring (8), a sealing groove (10) is formed in the right side of the fixed ring (8), a pull rod (12) is connected to the left side of the positioning block (9) in a sliding manner, a supporting rod (13) is connected to the right side of the pull rod (12) in a rotating manner, a locking rod (15) is connected to the right side of the supporting rod (13), springs (14) are arranged on the far side of the inner wall of the positioning block (9), a plurality of bearing blocks (17) are fixedly connected to the outer wall of the outer joint (16), an extension plate (18) is fixedly connected to the left side of the bearing blocks (17), a waterproof ring (19) is fixedly connected to the left side of the outer joint (16), and a shielding plate (20) is fixedly connected to the inner wall of the waterproof ring (19).
3. The multi-core fire resistant cable according to claim 2, characterized in that: the extending plate (18) is connected to the right side of the positioning block (9) in a sliding mode, and the lock rod (15) is connected to the top of the extending plate (18) in a sliding mode.
4. The multi-core fire resistant cable according to claim 2, characterized in that: the springs (14) are arranged on the far sides of the lock rods (15), and the lock rods (15) are connected to the inner wall of the positioning block (9) in a sliding mode.
5. The multi-core fire resistant cable according to claim 2, characterized in that: the shielding plate (20) is connected to the inner wall of the shielding groove (11) in a sliding mode, and the waterproof ring (19) is connected to the inner wall of the sealing groove (10) in a sliding mode.
6. The multi-core fire resistant cable according to claim 1, characterized in that: the insulating layer (3) is a crosslinked polyethylene shell, the shielding layer (4) is an aluminum foil and polymer film composite shell, and the outer protective layer (1) is a flame-retardant polypropylene shell.
7. The multi-core fire resistant cable according to claim 1, characterized in that: the filling layer (6) can be filled by magnesium carbonate cement, the heat insulation layer (2) is a silicon carbide fiber shell, and the magnesium hydroxide flame retardant is filled in the flame retardant layer (7).
8. The multi-core fire resistant cable according to claim 1, characterized in that: a plurality of conductors (5) are arranged symmetrically in the center of the filling layer (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322975046.2U CN221225875U (en) | 2023-11-03 | 2023-11-03 | Multi-core fire-resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322975046.2U CN221225875U (en) | 2023-11-03 | 2023-11-03 | Multi-core fire-resistant cable |
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| Publication Number | Publication Date |
|---|---|
| CN221225875U true CN221225875U (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322975046.2U Active CN221225875U (en) | 2023-11-03 | 2023-11-03 | Multi-core fire-resistant cable |
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| Country | Link |
|---|---|
| CN (1) | CN221225875U (en) |
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2023
- 2023-11-03 CN CN202322975046.2U patent/CN221225875U/en active Active
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