CN117059319B - Flame-retardant and fire-resistant power cable for rail transit - Google Patents

Flame-retardant and fire-resistant power cable for rail transit Download PDF

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Publication number
CN117059319B
CN117059319B CN202311326994.1A CN202311326994A CN117059319B CN 117059319 B CN117059319 B CN 117059319B CN 202311326994 A CN202311326994 A CN 202311326994A CN 117059319 B CN117059319 B CN 117059319B
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CN
China
Prior art keywords
seat
pipe
cable
side end
face
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Application number
CN202311326994.1A
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Chinese (zh)
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CN117059319A (en
Inventor
朱广杰
李明超
王智岩
葛子勋
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Hebei Jinli Cable Co ltd
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Hebei Jinli Cable Co ltd
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Priority to CN202311326994.1A priority Critical patent/CN117059319B/en
Publication of CN117059319A publication Critical patent/CN117059319A/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
    • H01B7/421—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation
    • H01B7/423—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction for heat dissipation using a cooling fluid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/185—Sheaths comprising internal cavities or channels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1875—Multi-layer sheaths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/025—Contact members formed by the conductors of a cable end
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/04—Pins or blades for co-operation with sockets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/621—Bolt, set screw or screw clamp
    • H01R13/6215—Bolt, set screw or screw clamp using one or more bolts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
    • H01R13/633—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only
    • H01R13/635—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only by mechanical pressure, e.g. spring force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/11—End pieces for multiconductor cables supported by the cable and for facilitating connections to other conductive members, e.g. for liquid cooled welding cables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • 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

Landscapes

  • Installation Of Indoor Wiring (AREA)

Abstract

The invention discloses a flame-retardant fire-resistant power cable for track traffic, which relates to the technical field of power cables, wherein inner cooling pipes are symmetrically embedded and installed at the side edges of the side end surfaces of a cable body, a plurality of annular bags are uniformly installed at the outer sides of the inner cooling pipes at equal intervals, guide blocks are rotatably installed at the positions, which are positioned at the outer sides of the inner cooling pipes, of the annular bags, limiting sleeves are sleeved on the outer sides of the annular bags, a flow dividing ring is sleeved at the positions, which correspond to the annular bags, of the outer sides of the limiting sleeves, and a heat mixing cylinder is sleeved on the outer sides of the flow dividing rings.

Description

Flame-retardant and fire-resistant power cable for rail transit
Technical Field
The invention relates to the technical field of power cables, in particular to a flame-retardant fire-resistant power cable for rail transit.
Background
The common rail traffic comprises traditional railways, subways, light rails, tramways, magnetic levitation rail systems, monorail systems and other novel rail traffic, and in the electric energy transmission of the rail traffic, a reliable power cable is required, and the requirements on the flame retardance and the fire resistance of the power cable are extremely high;
however, in the current power cable in the market, in the use process, local overheating is easily caused by load change of each cable in the cable, so that the effective service life of each cable is easily different due to uneven heating, the whole cable cannot be normally used due to damage of individual cables, the natural heat dissipation efficiency is low, the heat dissipation channel is single, the influence of the external temperature is extremely large, the heat dissipation and flame retardance cannot be effectively achieved, and the flame retardance are poor.
Disclosure of Invention
The invention provides a flame-retardant fire-resistant power cable for rail transit, which can effectively solve the problems that in the prior art, the power cable on the market is provided in the prior art, in the use process, the cables in the cable are extremely easy to be locally overheated due to load change, so that the cables are extremely easy to have different effective service lives due to uneven heating, the whole cable is extremely easy to be damaged by individual cables, the normal use of the whole cable is not realized, the natural heat dissipation efficiency is low, the heat dissipation channel is single, the influence of the external temperature is extremely large, the heat dissipation and flame retardance cannot be effectively realized, and the flame retardance is poor.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a fire-retardant fire-resistant power cable of track traffic, includes the cable body, cable body internally mounted has the fire-retardant mechanism of bi-pass, the fire-retardant mechanism of bi-pass includes interior cold tube;
the side end face of the cable body is symmetrically embedded with an inner cooling pipe, a plurality of annular bags are uniformly arranged on the outer side of the inner cooling pipe at equal intervals, a limit sleeve is sleeved on the outer side of the annular bag, a split ring is sleeved on the outer side of the limit sleeve at the position corresponding to the annular bag, and a heat mixing cylinder is sleeved on the outer side of the split ring;
the middle part of the side end face of the cable body is embedded with a radiating pipe, the side end face of the cable body is embedded with a valve pipe at the top of the radiating pipe, one end of the radiating pipe is clamped with a drainage seat, and the other end of the radiating pipe is clamped with a reflux seat;
the side end face edge of the drainage seat is symmetrically provided with an inner cannula, and the side end face edge of the reflux seat is symmetrically provided with an outer cannula;
throttling cylinders are arranged in the middle of the side end surfaces of the drainage seat and the reflux seat;
limiting pipes are arranged at the top of the middle ends of the side end surfaces of the drainage seat and the reflux seat, and a blocking block is slidably arranged in one throttling cylinder;
the other throttling cylinder is internally provided with a pressure-stacking block in a sliding manner, the limiting pipe is internally provided with a limiting column in a sliding manner, and the middle part of the side end face of the partition block is provided with a conducting frame.
According to the technical scheme, the guide block is rotatably arranged in the annular bag at the position outside the inner cooling pipe;
a bypass pipe is arranged at the bottom of the side end face of the reflux seat, a diversion trench is arranged at the position of the inner wall of the throttling cylinder corresponding to the bypass pipe, an isolating ring is arranged at the middle end inside the reflux seat, and a plurality of reflux pipes are uniformly arranged on the outer curved surface of the inner cooling pipe at equal intervals;
the limit sleeve is embedded and installed with a plurality of thermosensitive blocks along the equal angle of the circumferential direction, the inner side end face of the thermosensitive block is embedded and slidably installed with a contact seat, a through groove is formed in the side wall of the limit sleeve corresponding to the position of the thermosensitive block, and a plurality of cables are embedded and installed along the equal angle of the circumferential direction at the side edge of the side end face of the limit sleeve.
According to the technical scheme, the cable outer wall is sleeved with the shielding sleeve, the shielding net is wound on the outer side of the heat mixing cylinder, and the shielding sleeve and the shielding net are formed by weaving electromagnetic shielding materials.
According to the technical scheme, the outer wall of the radiating pipe is uniformly provided with a plurality of radiating annular plates at equal intervals, and the radiating annular plates are tooth-shaped;
the radiating annular plate, the radiating pipe and the cable body are uniformly and equidistantly surrounded along the axis direction of the radiating pipe to form a plurality of open heat conducting cavities, and the outer wall of the annular bag is an elastic pad;
the inner wall of the annular bag is formed by encircling a T-shaped support pad, and gas-liquid balance inert gas is filled in the inner cooling pipe, the annular bag, the heat mixing cylinder, the radiating pipe, the valve pipe and the thermosensitive block.
According to the technical scheme, the plurality of external insertion pipes are arranged at equal angles along the circumferential direction, the drainage seat is connected with the internal cooling pipe through the internal insertion pipe, the reflux seat is connected with the heat mixing cylinder through the external insertion pipe, and the heat mixing cylinder is connected with the internal cooling pipe through the reflux pipe;
the drainage seat and the reflux seat are connected with the radiating pipe through the throttling cylinder, and the drainage seat and the reflux seat are connected with the valve pipe through the limiting pipe.
According to the technical scheme, the partition block is connected with the limit column through the conducting frame, the partition block is positioned in the throttling cylinder at one side of the drainage seat, the stacking block is positioned in the throttling cylinder at one side of the backflow seat, the partition block and the stacking block are both matched with the throttling cylinder, the limit column is matched with the limit pipe, and a plurality of grooves are formed in the outer curved surface of the partition block along the circumferential direction at equal angles;
the isolating ring is in a water ladle shape, the isolating ring partitions the backflow seat into a diversion cavity and a pressure conduction cavity, the diversion groove is connected with the diversion cavity through a bypass pipe, the throttling cylinder is connected with a limiting pipe through the pressure conduction cavity, the length of the diversion groove is smaller than the thickness of the stacking block, the thickness of the stacking block is equal to half of the length of the throttling cylinder, and the length of the bypass pipe is equal to the length of the inner cavity of the throttling cylinder.
According to the technical scheme, the end part of the cable body is provided with the security on-off mechanism, and the security on-off mechanism comprises a sealing female seat;
the cable comprises a cable body, and is characterized in that a sealing female seat is arranged at one end of the cable body, a sealing auxiliary seat is arranged at the other end of the cable body, a screw rod is arranged at the top of the side end face of the sealing auxiliary seat through threads, screw holes are formed in the side end face of the sealing auxiliary seat corresponding to the screw rod, inner sliding plates are slidably arranged in the sealing female seat and the sealing auxiliary seat and are positioned at the outer side positions of the drainage seat and the reflux seat respectively, a conductive inserting rod is embedded in the side end face of the inner sliding plate corresponding to the cable position, a conductive inserting sleeve is embedded in the side end face of the inner sliding plate corresponding to the cable position, limiting inserting sleeves are arranged at the ends of the conductive inserting rods and the conductive inserting sleeves, a conductive ring sleeve is embedded in the inner walls of the conductive inserting sleeves and the limiting inserting sleeves, and a conductive plug is sleeved at the end part of the cable;
the pneumatic box is installed in the middle of the side end face of the inner slide plate, the corrugated pipe is installed in the middle of the side end face of the pneumatic box, the piston block is installed in the pneumatic box in a sliding mode, the supporting rod is installed in the middle of the side end face of the piston block, air guide grooves are formed in the middle of the side end face of the supporting rod and the middle of the side end face of the piston block, a pressure spring is sleeved on the outer side of the supporting rod, an air bag cushion is installed at the end portion of the supporting rod, a limiting cylinder is installed at the end portion of the supporting rod, a sliding rod is installed in the side portion of the side end face of the inner slide plate in a symmetrical embedded mode, and a spring is sleeved on the outer side of the sliding rod.
According to the technical scheme, the inner wall of the sealing female seat is matched with the outer wall of the end part of the sealing auxiliary seat, a plurality of sealing rings are uniformly arranged on the outer wall of the end part of the sealing auxiliary seat at equal intervals, and the screw rod is matched with the screw hole.
According to the technical scheme, the conductive inserting rod and the conductive loop sleeve are matched with the conductive plug, the conductive inserting rod and the conductive loop sleeve are connected with the conductive plug through the conductive loop sleeve, the position of the outer curved surface edge of the conductive plug, corresponding to the end part of the cable, is provided with the fastening bolt through threads, and the drainage seat and the backflow seat are connected with the pneumatic box through the corrugated pipe.
According to the technical scheme, the end part of the pneumatic box is flush with the limiting plug bush, the length of the sliding rod is equal to that of the corrugated pipe, the length of the sliding rod is equal to that of the spring, the length of the conductive plug is smaller than that of the spring, the sum of the lengths of the supporting rod and the pneumatic box is larger than the depth of the inner cavity of the sealed female seat, and the air bag cushion is connected with the pneumatic box through the air guide groove.
Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use;
1. the two-way flame-retardant mechanism is arranged, an internal cooling pipe, a heat mixing cylinder, a radiating pipe, an internal insertion pipe, an external insertion pipe and a return pipe are matched, an inert gas internal-external circulation passage can be constructed, the pressure limitation of a valve pipe, a limiting column and a conducting frame is utilized, a flow guiding seat, a return flow seat, a throttling cylinder, a bypass pipe, a flow guiding groove, a isolating ring, a isolating block and a flow limiting guide of a stacking block are matched, on one hand, the internal hot-pressing relation of a cable can be utilized, the inert gas is driven to flow directionally through a water hammer-like effect, so that axial large-circulation flow is formed, the heating balance of the cable body in all directions is improved, and when the cable is impacted externally, the external force is dispersed and solved by utilizing the flow conductivity of fluid, so that the durability and anti-interference performance of each cable are greatly improved, and the service life balance of the cable is improved, on the other hand, the internal-external heat exchanging and the external heat exchanging are formed, the bidirectional heat dissipation is realized, the heat dissipation efficiency and the effect are greatly improved, the flame-retardant performance of the cable body is greatly improved, and the electric power transmission work can be carried out more effectively, continuously and stably;
through leading the block, annular bag, stop collar and split ring cooperate, can utilize the differential pressure that different cables produced because of the load temperature variation, through annular bag deformation, the drainage guide of leading the block and lead to groove water conservancy diversion effect, drive the inert gas circulation flow interaction of radial high low temperature region, form the radial little circulation flow of a plurality of inert gases, it flows to join in marriage the axial major circulation, form radial, axial two-way heat circulation interaction, make heat transfer quality, heat transfer stability and heat transfer reliability obtain the spanned type improvement, further the heat transfer homogeneity of each position of cable body has been improved, effectively the cable body job stabilization nature has been improved, cooperate through thermosensitive block and contact seat, then can further improve radial little circulation heat transfer efficiency, simultaneously through radial, axial two-way heat circulation channel, can be in the process of fire, the quick inert gas of conveying, the required temperature of separation burning and oxygen, realize quick fire extinguishing, very big improvement flame retardant stability and safety in use.
2. The safety protection on-off mechanism is arranged, the supporting force and the adjusting carrier are provided through the inner sliding plate, on one hand, the safety protection on-off mechanism can be matched with the conductive inserted rod, the conductive inserted sleeve, the limiting inserted sleeve, the conductive ring sleeve and the conductive plug, the quick docking of a cable is realized in the cable wiring process, the cable installation process is effectively simplified, the convenience, the stability and the efficiency of the cable wiring are greatly improved, the cable can be put into operation more efficiently, stably and quickly, on the other hand, the limit supporting effect and the current limiting guiding effect of the pneumatic box, the corrugated pipe, the piston block, the supporting rod, the pressure spring, the sliding rod and the spring are matched, the automatic isolation of the cable is realized when the cable is in fire by utilizing the elasticity of the pressure spring and the spring, the probability that the fire is spread along the cable in the fire accident is effectively reduced, the loss caused by the electrical fire accident when the cable is in the electrical fire accident is effectively reduced while the working safety of the cable is improved, the flame retardant effect is indirectly realized, and the use safety and the flame retardant performance of the cable are improved;
through sealed female seat and sealed vice seat matched with, on the one hand, can join in marriage the spacing effect of lead screw and screw, further improve wiring convenience and efficiency between the cable, improve the cable wiring and stabilize, make the cable can be more quick, high-efficient, convenient and stable the input use, improve cable result of use, on the other hand can improve stability and the leakproofness of cable joint department by a wide margin, effectively reduce dust and moisture to the influence of cable work, very big improvement the compatible adaptability of cable to operational environment, make the performance of cable can more fully stable, and indirectly improved the electrical safety, the fire probability that leads to the fact because of joint department trouble has been reduced, the fire resistance has been improved to the change looks, through the gasbag pad, spacing section of thick bamboo and air duct cooperate, then can further improve the wiring stability of cable, and improve the compatible stability of cable break-make the installation connection work and the fire-retardant work of breaking link up more coherent of cable.
To sum up, this fire-retardant fire-resistant power cable for track traffic can realize the quick butt joint between the cable in the installation, very big improvement the efficiency of cable installation and the stability of wiring, can realize axial major cycle and radial little circulation heat transfer in the cable use, through inside and outside binary channels heat transfer, radiating efficiency and effect have been improved by a wide margin, make each position of cable be heated, the atress is more balanced, very big improvement hot pressing stability, the effective life and the interference killing effect of cable have been promoted by a wide margin, when the fire, available inert gas blocks required oxygen and the heat of burning fast, realize quick fire-retardant fire extinguishing, and can realize the automatic break-make between the cable, very big improvement the power consumption safety, the cable loss has been reduced.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a partial exploded view of the present invention;
FIG. 3 is a schematic view of a two-way flame retardant mechanism of the present invention;
FIG. 4 is a schematic view of a mounting structure of the drainage seat of the present invention;
FIG. 5 is a schematic view of a reflow seat mounting structure of the present invention;
FIG. 6 is a schematic view of the mounting structure of the inner cooling tube of the present invention;
FIG. 7 is a schematic diagram of the structure of the security on-off mechanism of the present invention;
FIG. 8 is a schematic view of the mounting structure of the spacing sleeve of the present invention;
FIG. 9 is a schematic view of the strut mounting arrangement of the present invention;
reference numerals in the drawings: 1. a cable body; 101. a cable; 102. a shielding sleeve; 103. a shielding net;
2. a two-way flame retardant mechanism; 201. an inner cooling tube; 202. a guide block; 203. an annular bladder; 204. a limit sleeve; 205. a heat mixing cylinder; 206. a shunt ring; 207. a heat radiating pipe; 208. a valve tube; 209. a drainage seat; 210. a reflux seat; 211. an inner cannula; 212. an outer cannula; 213. a throttle cylinder; 214. a limiting tube; 215. a partition block; 216. stacking blocks; 217. a limit column; 218. a conductive frame; 219. a bypass pipe; 220. a diversion trench; 221. a spacer ring; 222. a return pipe; 223. a thermal block; 224. a contact base; 225. a through groove;
3. a security on-off mechanism; 301. sealing the female seat; 302. sealing the auxiliary seat; 303. a screw rod; 304. a screw hole; 305. an inner slide plate; 306. a conductive plunger; 307. a conductive sleeve; 308. a limiting plug bush; 309. a conductive loop; 310. a conductive plug; 311. a pneumatic box; 312. a bellows; 313. a piston block; 314. a support rod; 315. a pressure spring; 316. an airbag cushion; 317. a limiting cylinder; 318. a slide bar; 319. a spring; 320. an air guide groove.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Examples: as shown in fig. 1-9, the invention provides a technical scheme, and the technical scheme comprises a cable body 1, wherein a two-way flame retardant mechanism 2 is arranged in the cable body 1, and the two-way flame retardant mechanism 2 comprises an inner cooling pipe 201, a guide block 202, an annular bag 203, a limit sleeve 204, a heat mixing cylinder 205, a flow dividing ring 206, a radiating pipe 207, a valve pipe 208, a drainage seat 209, a reflux seat 210, an inner pipe 211, an outer pipe 212, a throttle cylinder 213, a limit pipe 214, a partition block 215, a pressure stacking block 216, a limit post 217, a conduction frame 218, a bypass pipe 219, a guide groove 220, a partition ring 221, a return pipe 222, a heat sensitive block 223, a contact seat 224 and a through groove 225;
the side of the side end face of the cable body 1 is symmetrically embedded and provided with an inner cooling pipe 201, a plurality of annular bags 203 are uniformly arranged on the outer side of the inner cooling pipe 201 at equal intervals, a guide block 202 is rotatably arranged in the annular bag 203 at the position of the outer side of the inner cooling pipe 201, a limit sleeve 204 is sleeved on the outer side of the annular bag 203, a split ring 206 is sleeved on the outer side of the limit sleeve 204, a heat mixing cylinder 205 is sleeved on the outer side of the split ring 206, a radiating pipe 207 is embedded and arranged in the middle of the side end face of the cable body 1, a valve pipe 208 is embedded and arranged in the position of the top of the radiating pipe 207, a drainage seat 209 is clamped at one end of the radiating pipe 207, and a reflux seat 210 is clamped at the other end of the radiating pipe 207;
the side end face edge of the drainage seat 209 is symmetrically provided with an inner insertion pipe 211, the side end face edge of the backflow seat 210 is symmetrically provided with an outer insertion pipe 212, a plurality of outer insertion pipes 212 are arranged along the circumferential direction at equal angles, the drainage seat 209 is connected with an inner cooling pipe 201 through the inner insertion pipe 211, the backflow seat 210 is connected with a heat mixing cylinder 205 through the outer insertion pipe 212, the heat mixing cylinder 205 is connected with the inner cooling pipe 201 through a backflow pipe 222, the drainage seat 209 and the backflow seat 210 are both connected with a radiating pipe 207 through a throttling cylinder 213, the drainage seat 209 and the backflow seat 210 are both connected with a valve pipe 208 through a limiting pipe 214 so as to construct an axial circulation path, the rapid heat dissipation is realized, the middle parts of the side end faces of the drainage seat 209 and the backflow seat 210 are both provided with a throttling cylinder 213, and the middle end tops of the side end faces of the drainage seat 209 and the backflow seat 210 are both provided with a limiting pipe 214;
a baffle block 215 is slidably arranged in one throttling cylinder 213, a stacking block 216 is slidably arranged in the other throttling cylinder 213, a limiting column 217 is slidably arranged in the limiting tube 214, a conducting frame 218 is arranged in the middle of the end face of the side face of the baffle block 215, the baffle block 215 is connected with the limiting column 217 through the conducting frame 218, the baffle block 215 is positioned in the throttling cylinder 213 at one side of the drainage seat 209, the stacking block 216 is positioned in the throttling cylinder 213 at one side of the backflow seat 210, the baffle block 215 and the stacking block 216 are both engaged with the throttling cylinder 213, the limiting column 217 is engaged with the limiting tube 214, a plurality of grooves are formed in the outer curved surface of the baffle block 215 along the circumferential direction at equal angles so as to improve stable driving force for inert gas flow by utilizing the water hammer effect, a bypass pipe 219 is arranged at the bottom of the side end face of the reflux seat 210, a diversion trench 220 is arranged at the position, corresponding to the bypass pipe 219, of the inner wall of the throttling cylinder 213, a separation ring 221 is arranged at the middle end inside the reflux seat 210, the separation ring 221 is in a water ladle shape, the reflux seat 210 is separated into a diversion cavity and a pressure conduction cavity by the separation ring 221, the diversion trench 220 is connected with the diversion cavity through the bypass pipe 219, the throttling cylinder 213 is connected with a limiting pipe 214 through the pressure conduction cavity, the length of the diversion trench 220 is smaller than the thickness of a stacking block 216, the thickness of the stacking block 216 is equal to half of the length of the throttling cylinder 213, the length of the bypass pipe 219 is equal to the length of the inner cavity of the throttling cylinder 213, so that the pressure conduction stability is improved, and a plurality of backflow pipes 222 are uniformly arranged on the outer curved surfaces of the inner cooling pipe 201 at equal intervals;
the limit sleeve 204 is embedded to be installed a plurality of thermal blocks 223 along the equiangular degree of circumferencial direction, a plurality of radiating annular plates are evenly installed to radiating tube 207 outer wall equidistance, radiating annular plates, radiating tube 207 and cable body 1 are equidistant evenly around a plurality of open heat conduction chamber along radiating tube 207 axis direction, annular bag 203 outer wall is the elastic pad, annular bag 203 inner wall is T shape branch pad and surrounds and form, interior cold tube 201, annular bag 203, mix thermal cylinder 205, radiating tube 207, valve pipe 208 and thermal block 223 are inside all to be filled with gas-liquid equilibrium state inert gas, in order to improve the heat transfer effect, thermal block 223 inboard terminal surface embedding slidable mounting has contact seat 224, a plurality of cables 101 have been seted up to limit sleeve 204 lateral wall corresponding thermal block 223 position department, the shield sleeve 102 has been cup jointed to cable 101 outer wall, mix thermal cylinder 205 outside winding has shield net 103, shield sleeve 102 and shield net 103 are electromagnetic shielding material braiding constitution, in order to improve anti-electromagnetic interference ability.
The end part of the cable body 1 is provided with a security on-off mechanism 3, and the security on-off mechanism 3 comprises a sealing female seat 301, a sealing auxiliary seat 302, a screw rod 303, a screw hole 304, an inner slide plate 305, a conductive inserting rod 306, a conductive inserting sleeve 307, a limiting inserting sleeve 308, a conductive ring sleeve 309, a conductive plug 310, a pneumatic box 311, a corrugated pipe 312, a piston block 313, a supporting rod 314, a pressure spring 315, an air bag pad 316, a limiting cylinder 317, a sliding rod 318 and a spring 319;
a sealing female seat 301 is arranged at one end of the cable body 1, a sealing auxiliary seat 302 is arranged at the other end of the cable body 1, a screw rod 303 is arranged at the top of the side end face of the sealing auxiliary seat 302 through threads, a screw hole 304 is formed in the side end face of the sealing female seat 301 corresponding to the screw rod 303, the inner wall of the sealing female seat 301 is matched with the outer wall of the end part of the sealing auxiliary seat 302, a plurality of sealing rings are uniformly arranged on the outer wall of the end part of the sealing auxiliary seat 302 at equal intervals, the screw rod 303 is matched with the screw hole 304 so as to realize quick butt joint, the sealing performance is improved, inner sliding plates 305 are slidably arranged in the sealing female seat 301 and the sealing auxiliary seat 302 at the positions outside the drainage seat 209 and the reflux seat 210, a conductive inserting rod 306 is embedded in the side end face of one inner sliding plate 305 corresponding to the cable 101, and a conductive inserting sleeve 307 is embedded in the side end face of the other inner sliding plate 305 corresponding to the cable 101;
the ends of the conductive inserting rod 306 and the conductive inserting sleeve 307 are respectively provided with a limiting inserting sleeve 308, the inner walls of the conductive inserting sleeve 307 and the limiting inserting sleeve 308 are embedded and provided with a conductive annular sleeve 309, the end part of the cable 101 is sleeved with a conductive plug 310, the conductive inserting rod 306 and the conductive annular sleeve 309 are respectively matched with the conductive plug 310, the conductive inserting rod 306 and the conductive inserting sleeve 307 are respectively connected with the conductive plug 310 through the conductive annular sleeve 309, the positions, corresponding to the end part of the cable 101, of the outer curved surface edge part of the conductive plug 310 are respectively provided with a fastening bolt through threads, and the drainage seat 209 and the reflux seat 210 are respectively connected with a pneumatic box 311 through a corrugated pipe 312 so as to improve wiring stability;
the middle part of the side end face of the inner slide plate 305 is embedded and provided with a pneumatic box 311, the middle part of the side end face of the pneumatic box 311 is provided with a corrugated pipe 312, the inside of the pneumatic box 311 is slidably provided with a piston block 313, the middle part of the side end face of the piston block 313 is provided with a support rod 314, the middle parts of the side end faces of the support rod 314 and the piston block 313 are respectively provided with an air guide groove 320, the outer side of the support rod 314 is sleeved with a pressure spring 315, one end part of the support rod 314 is provided with an air bag cushion 316, the end part of the other support rod 314 is provided with a limit cylinder 317, the side end part of the side end face of the inner slide plate 305 is symmetrically embedded and slidably provided with a slide rod 318, the outer side of the slide rod 318 is sleeved with a spring 319, the end part of the pneumatic box 311 is flush with a limit plug 308, the length of the slide rod 318 is equal to the length of the corrugated pipe 312, the length of the slide rod 318 is equal to the original length of the spring 319, the length of the conductive plug 310 is smaller than the original length of the spring 319, and the sum of the lengths of the support rod 314 and the length of the pneumatic box 311 is larger than the depth of the inner cavity of the sealing master seat 301, and the air bag cushion 316 is connected with the pneumatic box 311 through the air guide grooves 315 so as to realize automatic circuit isolation, and flame retardance is improved.
The working principle and the using flow of the invention are as follows: when the flame-retardant and fire-resistant power cable for track traffic is actually used, firstly, a corresponding number of cable bodies 1 are pulled to a working position to be installed according to actual needs, then a sealing auxiliary seat 302 of one cable body 1 is pulled to be aligned with a sealing main seat 301 of the other cable body 1, the sealing auxiliary seat 302 is inserted into the sealing main seat 301 of the other cable body 1, then a screw rod 303 is rotated, the screw rod 303 is stably connected with screw holes 304 on the corresponding sealing main seat 301 through threads by utilizing a screw rod driving principle, the operations are sequentially repeated, and the corresponding number of cable bodies 1 are sequentially connected according to actual wiring needs;
in the process of the aforementioned wiring between the cable bodies 1, as the depth of the sealing auxiliary seat 302 of one cable body 1 inserted into the sealing main seat 301 of the other cable body 1 increases, firstly, the two corresponding inner sliding plates 305 approach each other, the conductive inserting rod 306 is gradually inserted into the corresponding conductive inserting sleeve 307 to be stably connected with the corresponding conductive ring sleeve 309, and the airbag cushion 316 is also gradually embedded into the limiting cylinder 317 synchronously;
then, the space between the two corresponding inner sliding plates 305 is kept unchanged, so that as the sealing auxiliary seat 302 is continuously inserted, the corresponding inner sliding plate 305 is pressed by the supporting rod 314, and relatively slides between the sealing main seat 301 and the sealing auxiliary seat 302, and relatively displaces to one side of the corresponding conductive plug 310, and then as the inner sliding plate 305 relatively slides, the spring 319 is compressed, the limiting plug 308 is close to the corresponding conductive plug 310, the conductive plug 310 is gradually inserted into the corresponding limiting plug 308 to be stably connected with the corresponding conductive ring sleeve 309, and after the conductive plug 310 is completely inserted into the corresponding limiting plug 308, the insertion depth of the sealing auxiliary seat 302 is continuously increased;
finally, the two corresponding inner sliding plates 305 are close again, at this time, under the supporting effect of the supporting rod 314, the piston block 313 slides relative to the pneumatic box 311, gas in the pneumatic box 311 enters the air bag pad 316 through the air guide groove 320 under the extrusion of the piston block 313, the air bag pad 316 presses against the inner wall of the limit cylinder 317 due to inflation and is stably connected with the limit cylinder 317, the relative position relationship among the seal female seat 301, the seal auxiliary seat 302 and the inner sliding plate 305 is further limited, and further after the seal auxiliary seat 302 of one cable body 1 is inserted into the seal female seat 301 of the other cable body 1, the corresponding cable 101 in the cable body 1 is also correspondingly and stably connected through the insertion and the connection among the conductive inserting rod 306, the conductive inserting sleeve 307, the limit inserting sleeve 308, the conductive ring 309 and the conductive inserting plug 310;
after the connection work between the cable bodies 1 and the connection between the cable 101 and the corresponding external device are completed, the cable 101 can be normally put into operation, during the use period of the cable 101, the cable 101 can generate heat correspondingly due to the change of external load, so that the internal temperature of the cable body 1 can fluctuate, when the internal temperature of the cable body 1 rises, inert gas in a gas-liquid equilibrium state in the inner cooling pipe 201 can be gasified due to the absorption of external heat, and the process of gasification heat absorption is utilized to continuously absorb the heat emitted by the cable 101 in the cable body 1, so that the rapid cooling and flame retardance are realized;
the pressure inside the inner cooling tube 201 is increased along with the gasification of the inert gas in the gas-liquid equilibrium state inside the inner cooling tube 201, and then the partially gasified gas enters the drainage seat 209 under the action of the pressure, and then the inert gas in the gas-liquid equilibrium state inside the valve tube 208 is pressed against the separation block 215 and the limit column 217, and at the moment, the inert gas in the gas-liquid equilibrium state inside the valve tube 208 is pressed against the other end of the limit column 217, and under the linkage of the conduction frame 218, the inert gas can push the separation block 215 to displace only when the pressure of the partially gasified gas exceeds the gas pressure in the gas-liquid equilibrium state, and then the inert gas passes through the groove on the separation block 215, enters the heat dissipation tube 207 through the throttling tube 213, and after the gasified gas enters the heat dissipation tube 207, the gasified gas is liquefied and released inside the heat dissipation tube 207 after the external heat supply is lost;
the internal pressure of the radiating pipe 207 is increased due to the entering of gasified inert gas, the inert gas in the gas-liquid balance state in the radiating pipe is liquefied synchronously, and is pushed by the pressure when the gasified inert gas enters, the inert gas flows directionally to one side of the backflow seat 210, then the flowing inert gas flows into the throttling cylinder 213 on the backflow seat 210, at the moment, under the conduction action of the pressure conduction cavity of the backflow seat 210, the corresponding stacking block 216 and the limiting column 217 are subjected to the same air pressure, then under the pressure support of the valve pipe 208, the stacking block 216 can block the flow guiding groove 220 to block the flow of the inert gas, so as to form a water hammer-like effect, then the stacking block 216 can slide relative to the throttling cylinder 213 under the pressure superposition pushing of the water hammer effect, the inert gas leaks out of the flow guiding groove 220, the inert gas enters the flow guiding cavity in the backflow seat 210 through the bypass pipe 219, and then the stacking block 216 is reset under the pressure support of the interior of the valve pipe 208, and the pressure of the gasified inert gas is used as driving pressure to replace the water hammer effect, so that the inert gas pressure is used for driving the water hammer effect, and the inert gas is caused to flow directionally;
the liquid inert gas after being overlapped by the water hammer effect enters the interior of the heat mixing cylinder 205 through the outer insertion pipe 212, absorbs heat emitted by the cable 101 from the outer side of the cable 101 in the flowing process after entering the interior of the heat mixing cylinder 205, flows back into the inner cooling pipe 201 through the return pipe 222, absorbs heat emitted by the cable 101 from the outer side of the cable 101 in the interior of the inner cooling pipe 201, is gasified again along with the absorption of the heat, and realizes double-channel cooling and flame retardance through gas-liquid conversion in the process of the large-circulation flow of the inert gas in the inner and outer axial directions;
in the process of the large circulation flow of the inert gas in the inner and outer axial directions, when the heat emitted by different cables 101 due to the load change is different, radial temperature difference occurs in the cable body 1, and then under the action of the temperature difference, the inert gas pressure around the different cables 101 also correspondingly changes, and then the inert gas around the cables 101 with high temperature can squeeze the annular bag 203, so that the annular bag 203 is deformed, the pressure in the thermosensitive block 223 close to the cable 101 with high temperature also rises, and the contact seat 224 also ejects and supports against the annular bag 203 under the action of air pressure synchronously, so that the elastic pad of the annular bag 203 is further deformed;
furthermore, in the deformation process of the elastic pad, inert gas in the annular bag 203 enters the corresponding chamber surrounded by the guide block 202 and the T-shaped support pad through the gap between the corresponding T-shaped support pads, pushes the guide block 202 to rotate, and the guide block 202 can pull part of gas to enter other chambers surrounded by the T-shaped support pad and the elastic pad to form radial high-temperature and low-temperature interaction, meanwhile, in the deformation process of the elastic pad, gas outside the limiting sleeve 204 also can form a second interaction channel through the reciprocating shuttle through groove 225 under the traction of pressure difference generated by the elastic deformation of the elastic pad, so that the radial temperature balance in the cable body 1 is promoted, the heat resistance of the cable body 1 is improved, and meanwhile, the effective service life of each cable 101 is balanced;
in the use process of the cable, when the cable body 1 is suddenly increased in temperature due to external human factors, excessive load, or other unexpected factors such as short circuit, and the like, and the fire of the cable body 1 exceeds the upper limit of self regulation, the fire part of the cable body 1 can not maintain the air tightness due to the damage of the structure, inert gas can quickly flow out from the damaged part, in the flowing process, the inert gas in the liquid and gas-liquid balance state can be gasified, and the inert gas absorbs a large amount of heat while driving surrounding air to form an anaerobic environment, blocks the temperature required by combustion, prevents flame combustion from spreading, and gas in the pneumatic box 311 can also flow out through the corrugated pipe 312, so that the piston block 313 can not give the strut 314 sufficient supporting force, the strut 314 can retract into the pneumatic box 311 under the elastic force of the pressure spring 315, so that the air bag pad 316 is separated from the limiting cylinder 317 in order to replace the cable 101 in the subsequent work, and the inner sliding strut 305 can also be driven to displace under the elastic force of the spring 319 after losing 314 support, so that the limiting sleeve 308 is separated from the conductive plug 310, thus realizing automatic disconnection of the electric circuit fire from spreading is avoided.
Finally, it should be noted that: the foregoing is merely a preferred example of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a fire-retardant fire-resistant power cable for track traffic, includes cable body (1), its characterized in that: the cable comprises a cable body (1), wherein a two-way flame-retardant mechanism (2) is arranged in the cable body, and the two-way flame-retardant mechanism (2) comprises an inner cooling pipe (201);
an inner cooling pipe (201) is symmetrically embedded and installed at the edge of the side end face of the cable body (1), a plurality of annular bags (203) are uniformly installed at the outer side of the inner cooling pipe (201) at equal intervals, a limiting sleeve (204) is sleeved at the outer side of the annular bag (203), a flow dividing ring (206) is sleeved at the position, corresponding to the annular bag (203), of the outer side of the limiting sleeve (204), and a heat mixing cylinder (205) is sleeved at the outer side of the flow dividing ring (206);
the middle part of the side end face of the cable body (1) is embedded and provided with a radiating pipe (207), the side end face of the cable body (1) is located at the top of the radiating pipe (207) and is embedded and provided with a valve pipe (208), one end of the radiating pipe (207) is clamped and connected with a drainage seat (209), and the other end of the radiating pipe (207) is clamped and connected with a reflux seat (210);
an inner insertion pipe (211) is symmetrically arranged at the side end face edge of the drainage seat (209), and an outer insertion pipe (212) is symmetrically arranged at the side end face edge of the reflux seat (210);
the middle parts of the side end surfaces of the drainage seat (209) and the reflux seat (210) are respectively provided with a throttling cylinder (213);
limiting pipes (214) are arranged at the middle end tops of the side end surfaces of the drainage seat (209) and the reflux seat (210), and a blocking block (215) is slidably arranged in one throttling cylinder (213);
the other throttling cylinder (213) is internally provided with a stacking block (216) in a sliding manner, the limiting pipe (214) is internally provided with a limiting column (217) in a sliding manner, and the middle part of the side end surface of the partition block (215) is provided with a conducting frame (218);
the internal cooling pipe (201), the heat mixing cylinder (205), the radiating pipe (207) and the valve pipe (208) are filled with inert gases in a gas-liquid equilibrium state;
the external insertion pipes (212) are arranged in a plurality at equal angles along the circumferential direction, the drainage seat (209) is connected with the internal cooling pipe (201) through the internal insertion pipe (211), the reflux seat (210) is connected with the heat mixing cylinder (205) through the external insertion pipe (212), and the heat mixing cylinder (205) is connected with the internal cooling pipe (201) through the reflux pipe (222);
the drainage seat (209) and the backflow seat (210) are connected with the radiating pipe (207) through the throttling cylinder (213), and the drainage seat (209) and the backflow seat (210) are connected with the valve pipe (208) through the limiting pipe (214).
2. A flame-retardant and fire-resistant power cable for railway traffic according to claim 1, characterized in that the inside of the annular bladder (203) is rotatably fitted with a guide block (202) at a position outside the inner cooling tube (201);
a bypass pipe (219) is arranged at the bottom of the side end face of the reflux seat (210), a diversion trench (220) is formed in the position, corresponding to the bypass pipe (219), of the inner wall of the throttling cylinder (213), an isolating ring (221) is arranged at the middle end inside the reflux seat (210), and a plurality of reflux pipes (222) are uniformly arranged on the outer curved surface of the inner cooling pipe (201) at equal intervals;
the thermal-sensitive block type cable limiting device is characterized in that the limiting sleeve (204) is embedded and installed with a plurality of thermal-sensitive blocks (223) along the equal angle of the circumferential direction, the inner side end face of the thermal-sensitive block (223) is embedded and slidably installed with a contact seat (224), a through groove (225) is formed in the side wall of the limiting sleeve (204) corresponding to the position of the thermal-sensitive block (223), and a plurality of cables (101) are embedded and installed at the side edge of the side end face of the limiting sleeve (204) along the equal angle of the circumferential direction.
3. The flame-retardant and fire-resistant power cable for track traffic according to claim 2, characterized in that the outer wall of the cable (101) is sleeved with a shielding sleeve (102), a shielding net (103) is wound on the outer side of the heat mixing drum (205), and the shielding sleeve (102) and the shielding net (103) are both formed by weaving electromagnetic shielding materials.
4. The flame-retardant and fire-resistant power cable for track traffic according to claim 2, characterized in that the outer wall of the radiating pipe (207) is uniformly provided with a plurality of radiating annular plates in an equidistant manner, and the radiating annular plates are tooth-shaped;
the radiating annular plate, the radiating pipe (207) and the cable body (1) are uniformly and equidistantly encircled along the axis direction of the radiating pipe (207) to form a plurality of open heat conducting cavities, and the outer wall of the annular bag (203) is an elastic pad;
the inner wall of the annular bag (203) is formed by encircling a T-shaped supporting pad;
the inside of the annular bag (203) and the inside of the thermosensitive block (223) are filled with inert gas in a gas-liquid equilibrium state.
5. The flame-retardant and fire-resistant power cable for track traffic according to claim 2, characterized in that the partition block (215) is connected with a limit column (217) through a conducting frame (218), the partition block (215) is positioned inside a throttling cylinder (213) at one side of a drainage seat (209), the stacking block (216) is positioned inside the throttling cylinder (213) at one side of a backflow seat (210), the partition block (215) and the stacking block (216) are both engaged with the throttling cylinder (213), the limit column (217) is engaged with a limit pipe (214), and a plurality of grooves are formed in the outer curved surface of the partition block (215) along the circumferential direction at equal angles;
the isolating ring (221) is in a water ladle shape, the isolating ring (221) partitions the backflow seat (210) into a diversion cavity and a pressure conduction cavity, the diversion groove (220) is connected with the diversion cavity through a bypass pipe (219), the throttling cylinder (213) is connected with a limiting pipe (214) through the pressure conduction cavity, the length of the diversion groove (220) is smaller than the thickness of the stacking block (216), the thickness of the stacking block (216) is equal to half of the length of the throttling cylinder (213), and the length of the bypass pipe (219) is equal to the length of an inner cavity of the throttling cylinder (213).
6. The flame-retardant and fire-resistant power cable for track traffic according to claim 2, characterized in that the end of the cable body (1) is provided with a security on-off mechanism (3), the security on-off mechanism (3) comprises a sealing female seat (301);
the cable comprises a cable body (1), and is characterized in that a sealing female seat (301) is arranged at one end of the cable body (1), a sealing auxiliary seat (302) is arranged at the other end of the cable body (1), a screw rod (303) is arranged at the top of the side end face of the sealing auxiliary seat (302) in a threaded manner, screw holes (304) are formed in the positions, corresponding to the screw rod (303), of the side end face of the sealing female seat (301), an inner sliding plate (305) is slidably arranged in the positions, located outside a drainage seat (209) and a backflow seat (210), of the sealing female seat (301) and the sealing auxiliary seat (302), a conductive inserting rod (306) is embedded in the position, corresponding to the cable (101), of the side end face of the inner sliding plate (305), a conductive inserting sleeve (307) is embedded in the position, a limiting inserting sleeve (308) is arranged at the ends of the conductive inserting rod (306) and the limiting inserting sleeve (307), a conductive ring sleeve (309) is embedded in the inner wall of the limiting inserting sleeve (308), and a conductive plug (310) is embedded in the ends of the cable (101);
the pneumatic sliding device is characterized in that a pneumatic box (311) is embedded in the middle of the side end face of the inner sliding plate (305), a corrugated pipe (312) is arranged in the middle of the side end face of the pneumatic box (311), a piston block (313) is arranged in the pneumatic box (311) in a sliding mode, a supporting rod (314) is arranged in the middle of the side end face of the piston block (313), air guide grooves (320) are formed in the middle of the side end face of the supporting rod (314) and the middle of the side end face of the piston block (313), a pressure spring (315) is sleeved outside the supporting rod (314), an air bag cushion (316) is arranged at the end portion of the supporting rod (314), a limiting cylinder (317) is arranged at the end portion of the supporting rod (314), a sliding rod (318) is symmetrically embedded in the side edge portion of the side end face of the inner sliding plate (305), and a spring (319) is sleeved outside the sliding rod (318).
7. The flame-retardant and fire-resistant power cable for track traffic according to claim 6, wherein the inner wall of the sealing female seat (301) is matched with the outer wall of the end part of the sealing auxiliary seat (302), a plurality of sealing rings are uniformly arranged on the outer wall of the end part of the sealing auxiliary seat (302) at equal intervals, and the screw rod (303) is matched with the screw hole (304).
8. The flame-retardant and fire-resistant power cable for track traffic according to claim 6, wherein the conductive inserting rod (306) and the conductive loop (309) are both matched with the conductive plug (310), the conductive inserting rod (306) and the conductive loop (307) are both connected with the conductive plug (310) through the conductive loop (309), the position of the outer curved surface edge of the conductive plug (310) corresponding to the end part of the cable (101) is provided with a fastening bolt through threads, and the drainage seat (209) and the backflow seat (210) are both connected with the pneumatic box (311) through corrugated pipes (312).
9. The flame-retardant and fire-resistant power cable for railway transportation according to claim 6, characterized in that the end of the pneumatic box (311) is flush with the limit plug bush (308), the length of the sliding rod (318) is equal to the length of the corrugated pipe (312), the length of the sliding rod (318) is equal to the original length of the spring (319), the length of the conductive plug (310) is smaller than the original length of the spring (319), the sum of the lengths of the supporting rod (314) and the pneumatic box (311) is larger than the depth of the inner cavity of the sealing female seat (301), and the air bag pad (316) is connected with the pneumatic box (311) through the air guide groove (320).
CN202311326994.1A 2023-10-13 2023-10-13 Flame-retardant and fire-resistant power cable for rail transit Active CN117059319B (en)

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CN117833147B (en) * 2024-03-01 2024-05-10 天津轨道交通城市发展有限公司 Flame-retardant heat-insulating structure for photovoltaic power transmission cable

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