CN114709021B - Efficient insulating flame-retardant power cable - Google Patents
Efficient insulating flame-retardant power cable Download PDFInfo
- Publication number
- CN114709021B CN114709021B CN202210254667.9A CN202210254667A CN114709021B CN 114709021 B CN114709021 B CN 114709021B CN 202210254667 A CN202210254667 A CN 202210254667A CN 114709021 B CN114709021 B CN 114709021B
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- China
- Prior art keywords
- box body
- flame
- upper box
- protection tube
- retardant
- Prior art date
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Links
- 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 title claims abstract description 59
- 239000003063 flame retardant Substances 0.000 title claims abstract description 57
- 239000004576 sand Substances 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims 1
- 230000001681 protective effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 7
- 239000011241 protective layer Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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
- H01B7/17—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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0406—Details thereof
- H02G3/0412—Heat or fire protective means
-
- 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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0462—Tubings, i.e. having a closed section
- H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
-
- 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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The application discloses a high-efficiency insulating flame-retardant power cable, which comprises a cable body and flame-retardant units penetrated by the cable body, wherein each flame-retardant unit comprises a protective tube and end caps positioned at two ends of the protective tube, one end of each end cap is open, the other end of each end cap is provided with a through hole penetrated by the cable body, a first annular flange is arranged at the open position of each end cap, an annular baffle penetrated by the cable body is arranged in each end cap, an abutting block abutted with the annular baffle is arranged in each end cap, two ends of the protective tube are respectively inserted into the two end caps and abutted against the annular baffle in the two end caps, two second annular flanges are arranged at the protective tube, the two second annular flanges are in one-to-one correspondence with the first annular flanges of the two end caps, and the corresponding first annular flanges and the second annular flanges are fixedly connected; and a flame retardant is filled between one end of the end cap with the through hole and the annular baffle. The cable has high-efficiency flame-retardant effect.
Description
Technical Field
The application relates to the field of cables, in particular to a high-efficiency insulating flame-retardant power cable.
Background
The flame-retardant cable is characterized in that a sample is burnt under a specified test condition, and after a test fire source is removed, flame spread is only within a limited range, and residual flame or residual burning can be automatically extinguished within a limited time. The fundamental characteristics are: in the case of fire, it may burn out and fail to operate, but the spread of fire is prevented. Flame retardant property is extremely important characteristic to the cable, in the use of cable, sometimes exists the condition that the cable passes the wall body to the opposite side from one side of wall body, takes place to burn when one side of wall body, if to the flame retardant property of cable not up to standard, perhaps wears to establish unreasonable, can lead to because the wall is worn to the cable, the fire stretches along the cable in time, and is dangerous.
Disclosure of Invention
The application aims to: the application aims to solve the problems in the background art and provides a high-efficiency insulating flame-retardant power cable.
The technical scheme is as follows: the utility model provides a high-efficient insulating fire-retardant power cable, includes the cable body and is passed the fire-retardant unit of cable body, fire-retardant unit includes the protection tube and is located the tip cap at protection tube both ends, tip cap one end is uncovered, and the other end has the through-hole that is passed by the cable body, tip cap's uncovered department has first ring flange, have in the tip cap by the ring separation blade that the cable body passed, tip cap inside wall still has with ring separation blade butt piece, the both ends of protection tube insert respectively in two tip caps to the ring separation blade in the butt two tip caps, protection tube department still has two second ring flanges, two second ring flanges and the first ring flange one-to-one of two tip caps, fixed connection between corresponding first ring flange and the second ring flange; and a flame retardant is filled between one end of the end cap, which is provided with the through hole, and the annular baffle.
Therefore, the protection pipe can penetrate through the wall body to be fixedly connected with the wall body, and the end cap achieves a certain flame-retardant effect on the cable.
Further, the cable body sequentially comprises an outer sheath, an armor layer, an outer flame-retardant layer, a shielding layer and an inner sheath from outside to inside, wherein a plurality of cable cores are arranged in the inner sheath, and each cable core sequentially comprises a copper conductor, an insulating layer and an inner flame-retardant layer from inside to outside.
The structure of the cable body can be adjusted according to the flame-retardant level, but the cable body has better flame-retardant property and is not easy to catch fire, so that the cable body is matched with a flame-retardant unit for use.
Further, the fire retardant is fire extinguishing sand.
Further, the inner protective layer is a polyethylene inner protective layer, the inner protective layer is a low-smoke halogen-free flame-retardant layer, and the outer flame-retardant layer is a flame-retardant wrapping tape layer.
Further, a lower box body positioned below the protection pipe and an upper box body positioned above the protection pipe are fixed at the protection pipe, and a plurality of radiating fins positioned between the upper box body and the lower box body are arranged on the outer side wall of the protection pipe; the lower box body is fixedly connected with a lower connecting bracket, and the upper box body is fixedly provided with an upper connecting bracket; the top end and the bottom end of the lower box body are both open, the top end of the lower box body is fixedly connected with the protection tube, and the lower box body is not communicated with the inner space of the protection tube; the top and the bottom of top box body are all uncovered, and protection tube department has bar intercommunicating pore with protection tube inner space and top box body inner space intercommunication, top box body bottom still is fixed with the open confined closure apron in top box body top.
Further, a rectangular frame-shaped supporting convex edge is fixed on the inner side wall of the upper box body, a bearing film is fixed at the supporting convex edge, a vertical plate is also fixed in the upper box body, two ends of the vertical plate are fixed with the inner side wall of the upper box body, the vertical plate is provided with a through groove penetrating through the top end and the bottom end of the vertical plate, a piston part is also arranged in the upper box body, a plugboard capable of being inserted into the through groove is fixed at the piston part, and a cutter is arranged at the bottom end of the plugboard; the upper box body is characterized in that the outer side wall of the upper box body is fixedly provided with a gas storage container through a mounting frame, the gas storage container is communicated with a space between the piston part of the upper box body and the closed cover plate through a connecting pipe, a first electromagnetic valve is arranged at the connecting pipe, and fire extinguishing sand is filled in the space between the bearing film and the piston part in the upper box body.
Further, two cutters are arranged, cutting edges capable of cutting the bearing film are arranged below the cutters, one end, close to the end cap, of each cutting edge is lower than one end, far away from the end cap, of each cutting edge, and the cutting edges of the two cutters are distributed in an inverted V shape; the bottom of the air bag is cambered when the air bag is full of air, and the midpoint of the bottom of the air bag is positioned at the lowest position of the air bag.
Further, the top end of the piston part is provided with a transverse reinforcing rib and a longitudinal reinforcing rib; the bearing film is provided with a plurality of mutually parallel reinforcing strips.
The piston part is a rubber piston, can move downwards under the impact of high-pressure gas, and the strength of the piston part can be increased by the transverse reinforcing ribs and the longitudinal reinforcing ribs.
Further, the protection pipe is also connected with an air outlet elbow, one end of the air outlet elbow connected with the protection pipe is positioned in the box body below, the other end of the air outlet elbow is provided with a second electromagnetic valve, and the other end of the air outlet elbow is higher than the upper surface of the supporting convex edge.
When the fire extinguishing sand falls down, the gas in the protective tube can be rapidly discharged by the gas outlet pipe.
Further, the air outlet elbow passes through the lower box body; the two air outlet bent pipes are fixedly connected with the strip-shaped plate, and the strip-shaped plate is fixedly connected with the upper box body.
The effective fixation of the two air outlet pipes is realized through the strip-shaped plate.
Further, the end cap is circular in cross-section.
Further, the corresponding first annular flange and the second annular flange are fixedly connected through bolts and nuts.
Further, the top end of the upper protection box is provided with a rectangular frame-shaped flange, and the closed cover plate is fixedly connected with the rectangular frame-shaped flange through bolts.
Further, there are 4 through holes, one air bag is communicated with two of the through holes, and the other air bag is communicated with the other two through holes.
Further, the flame retardant unit further comprises a control unit and a communication unit, and the first electromagnetic valve, the second electromagnetic valve and the communication unit are all connected with the control unit.
The communication unit is capable of establishing communication with an external smoke sensor.
Further, the gas storage tank stores high-pressure gas.
Further, the sealing cover plate is in sealing connection with the top end of the upper box body.
The beneficial effects are that: the cable of the present application has the following advantages over a general cable:
1) The cable has a double flame-retardant structure, has better flame-retardant property and is not easy to catch fire compared with a single-layer flame-retardant structure;
2) The fire-retardant filler at two ends of the fire-retardant unit makes the fire difficult to realize the extension of the fire through the cable, and the end cap is shorter in length, so that the heat dissipation of the cable is not affected.
3) Through the structure of protection tube and upper and lower box body, on the one hand the convenience with the fixed of wall, on the one hand realize initiatively spreading sand fire-retardant, flame retardant efficiency is better.
Drawings
FIG. 1 is a schematic view of a cable according to the present application from a first perspective;
FIG. 2 is a schematic view of a second view of the cable of the present application after it has been installed;
FIG. 3 is an exploded view of the end caps on both sides of the cable of the application;
FIG. 4 is a schematic view of the first view of the two sides of the cable of the present application with the closure cover plate, piston portion, etc. exploded;
FIG. 5 is a schematic view of a second view of the cable of the present application with its closure cover plate, piston portion, etc. exploded;
FIG. 6 is a schematic view of a third view of the closure cover plate, piston portion, etc. on both sides of the cable of the present application;
fig. 7 is a schematic view of the cable body structure.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Reference numerals: 1, a cable body; 1.1 copper conductors; 1.2 insulating layers; 1.3 an inner flame retardant layer; 1.4 inner sheath; 1.5 shielding layer; 1.6 an outer flame retardant layer; 1.7 armor layers; 1.8 an outer sheath; 2.1 upper box body; 2.1.1 sealing cover plate; 2.1.2 gas storage containers; 2.1.3 solenoid valves; 2.1.4 support ledges; 2.1.5 risers; 2.2 lower box body; 2.3 protecting the tube; 2.3.1 outlet duct; 2.3.2 a second solenoid valve; 2.4 a second annular flange; 2.5 radiating fins; 2.6 piston part; 2.6.1 plugboards; 2.6.2 cutters; 2.6.3 balloons; 2.6.4 through holes; 2.6.5 transverse reinforcing ribs; 2.7 a carrier film; 2.7.1 reinforcing bars; 3.1 end caps; 3.2 a first annular flange; 3.3 abutting blocks; 3.4, a circular baffle; 9.1, connecting a bracket above; 9.2, connecting a bracket below; 10 wall body.
As shown in fig. 1-7, the high-efficiency insulating flame-retardant power cable comprises a cable body 1 and a flame-retardant unit penetrated by the cable body 1, wherein the flame-retardant unit comprises a protection tube 2.3 and end caps 3.1 positioned at two ends of the protection tube 2.3, one end of the end caps 3.1 is open, the other end of the end caps is provided with a through hole penetrated by the cable body 1, a first annular flange 3.2 is arranged at the open position of the end caps 3.1, an annular baffle 3.4 penetrated by the cable body 1 is arranged in the end caps 3.1, an abutting block 3.3 abutted with the annular baffle 3.4 is arranged on the inner side wall of the end caps 3.1, two ends of the protection tube 2.3 are respectively inserted into the two end caps 3.1 and abutted with the annular baffle 3.4 in the two end caps 3.1, two second annular flanges 2.4 are also arranged at the positions of the protection tube 2.3, and the two second annular flanges 2.4 are in correspondence to the first annular flanges 2.4 of the two end caps 2.1 and the first annular flanges 2.4 of the two annular flanges are in correspondence to the first annular flanges 2.4 of the two annular flanges 3; and a flame retardant is filled between one end of the end cap 3.1 with the through hole and the annular baffle 3.4.
The cable body 1 sequentially comprises an outer sheath 1.8, an armor layer 1.7, an outer flame-retardant layer 1.6, a shielding layer 1.5 and an inner sheath 1.4 from outside to inside, wherein the inner sheath 1.4 comprises a plurality of cable cores, and the cable cores sequentially comprise a copper conductor 1.1, an insulating layer 1.2 and an inner flame-retardant layer 1.3 from inside to outside. The fire retardant is fire extinguishing sand. The inner protection layer 1.4 is a polyethylene inner protection layer, the inner protection layer 1.3 is a low-smoke halogen-free flame-retardant layer, and the outer flame-retardant layer 1.6 is a flame-retardant wrapping tape layer.
The protection tube 2.3 is fixedly provided with a lower box body 2.2 positioned below the protection tube 2.3 and an upper box body 2.1 positioned above the protection tube 2.3, and the outer side wall of the protection tube 2.3 is also provided with a plurality of radiating fins 2.5 positioned between the upper box body 2.1 and the lower box body 2.2; the lower box body 2.2 is fixedly connected with a lower connecting bracket 9.2, and an upper connecting bracket 9.1 is fixed at the position of the upper box body 2.1; the top end and the bottom end of the lower box body 2.2 are both open, the top end of the lower box body 2.2 is fixedly connected with the protection tube 2.3, and the lower box body 2.2 is not communicated with the inner space of the protection tube 2.3; the top and the bottom of the upper box body 2.1 are all open, and the protection tube 2.3 is provided with a strip-shaped communication hole for communicating the internal space of the protection tube 2.3 with the internal space of the upper box body 2.1, and a closed cover plate 2.1.1 for closing the top opening of the upper box body 2.1 is also fixed at the bottom of the upper box body 2.1. The inner side wall of the upper box body 2.1 is fixedly provided with a rectangular frame-shaped supporting convex edge 2.1.4, a bearing film 2.7 is fixed at the position of the supporting convex edge 2.1.4, a vertical plate 2.1.5 is also fixed in the upper box body 2.1, two ends of the vertical plate 2.1.5 are fixed with the inner side wall of the upper box body 2.1, the vertical plate 2.1.5 is provided with a through groove penetrating through the top end and the bottom end of the vertical plate 2.1.5, a piston part 2.6 is also arranged in the upper box body 2.1, a plugboard 2.6.1 capable of being inserted into the through groove is fixed at the position of the piston part 2.6, and a cutter 2.6.2 is arranged at the bottom end of the plugboard 2.6.1; the gas storage container 2.1.2 is fixedly mounted on the outer side wall of the upper box body 2.1 through a mounting frame, the gas storage container 2.1.2 is communicated with a space between a piston part 2.6 of the upper box body 2.1 and a closed cover plate 2.1.1 through a connecting pipe, a first electromagnetic valve is arranged at the connecting pipe, and fire extinguishing sand is filled in the space between a bearing film 2.7 and the piston part 2.6 in the upper box body 2.1. The two cutters 2.6.2 are arranged, cutting edges capable of cutting the bearing film 2.7 are arranged below the cutters 2.6.2, one end, close to the end cap 3.1, of each cutting edge is lower than one end, far away from the end cap 3.1, of each cutting edge, and the cutting edges of the two cutters 2.6.2 are distributed in an inverted V shape; two air bags 2.6.3 are arranged below the piston part 2.6, the inserting plate 2.6.1 is arranged between the two air bags 2.6.3, each air bag 2.6.3 is arranged between the vertical plate 2.1.5 and one side wall of the upper box body 2.1, a plurality of through holes 2.6.4 penetrating the top end and the bottom end of the piston part 2.6 are arranged at the position of the piston part 2.6, each air bag 2.6.3 is communicated with at least one through hole 2.6.4, when the air bag 2.6.3 is full of air, the bottom of the air bag 2.6.3 is in a cambered surface shape, and the midpoint of the bottom of the air bag 2.6.3 is positioned at the lowest position of the air bag.
The top end of the piston part 2.6 is provided with a transverse reinforcing convex rib 2.6.5 and a longitudinal reinforcing convex rib; the carrier film 2.7 has a plurality of mutually parallel reinforcing strips 2.7.1. The protection tube 2.3 is also connected with an air outlet bent tube 2.3.1, one end of the air outlet bent tube 2.3.1 connected with the protection tube 2.3 is positioned in the lower box body 2.2, the other end of the air outlet bent tube 2.3.1 is provided with a second electromagnetic valve 2.3.2, and the other end of the air outlet bent tube 2.3.1 is higher than the upper surface of the supporting convex edge 2.1.4. The air outlet elbow 2.3.1 passes through the lower box body 2.2; two air outlet bent pipes 2.3.1 are arranged, the two air outlet bent pipes 2.3.1 are fixedly connected with a strip-shaped plate, and the strip-shaped plate is fixedly connected with the upper box body 2.1.
As shown in the figure, the cable body of the application has a double-layer flame-retardant structure, a flame-retardant wrapping tape and a low-smoke halogen-free flame-retardant layer, so that a better flame-retardant effect is obtained, and when the cable body is installed by penetrating through a wall body, a protection pipe penetrates through the wall body and is fixedly connected with the wall body by utilizing an upper bracket and a lower bracket. And the end cap is filled with fire extinguishing sand, thereby avoiding the spread of fire along the cable. And during normal use, because the end cap is shorter, the protection pipe is also of a hollow structure and is provided with radiating fins, so that the heat of the cable can be normally emitted. When the fire occurs, the controller (the controller can be linked with an external smoke sensor) can control the first electromagnetic valve and the second electromagnetic valve to be opened, so that high-pressure gas impacts the piston part, on one hand, the piston part cuts off the bearing film, and thereby fire extinguishing sand falls down to cover the cable (the fire extinguishing sand falls into the protection tube from the upper box body through the strip-shaped through hole), and the cable is prevented from being ignited. The flashboard is inserted into the setting of riser through groove (no fire extinguishing sand is in the riser through groove) for the piston can not meet the resistance of fire extinguishing sand when descending, thereby can cut the bearing film smoothly fast, and the cutting edge is high on one side and low on the other side, makes the cutting can be more smooth. And when the piston moves down, the air bag can be filled with air, so that when the air bag is filled with air (the air bag can further extrude fire extinguishing sand to quickly fall in the process of inflating), the air bag is low in the middle and high in the two sides, so that the fire extinguishing sand is extruded towards the two sides, the fire extinguishing sand is extruded towards the two sides more intensively, and the fire retarding effect is more favorable (because the fire spreading is spreading from the end part, the fire extinguishing sand is extruded towards the end part to be favorable for retarding). And when the fire extinguishing sand falls, the second electromagnetic valve at the air outlet pipe is opened, so that the original gas in the protective pipe can be rapidly discharged, and the falling of the fire extinguishing sand is facilitated. So that the heat dissipation effect is very good when the fire-extinguishing device is used in usual, and when the fire occurs, can well flame retardant, and has an effective flame retardant effect.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the scope of the invention as defined in the following claims.
Claims (6)
1. The high-efficiency insulating flame-retardant power cable is characterized by comprising a cable body and flame-retardant units penetrated by the cable body, wherein each flame-retardant unit comprises a protection tube and end caps positioned at two ends of the protection tube, one end of each end cap is open, the other end of each end cap is provided with a through hole penetrated by the cable body, a first annular flange is arranged at the opening of each end cap, annular baffle sheets penetrated by the cable body are arranged in each end cap, abutting blocks abutted with the annular baffle sheets are further arranged on the inner side walls of the end caps, two ends of each protection tube are respectively inserted into the two end caps and abutted against the annular baffle sheets in the two end caps, two second annular flanges are further arranged at the protection tube, each two second annular flanges are in one-to-one correspondence with the first annular flanges of the two end caps, and the corresponding first annular flanges and the second annular flanges are fixedly connected; a flame retardant is filled between one end of the end cap, which is internally provided with a through hole, and the annular baffle plate; the protection tube is fixedly provided with a lower box body positioned below the protection tube and an upper box body positioned above the protection tube, and the outer side wall of the protection tube is also provided with a plurality of radiating fins positioned between the upper box body and the lower box body; the lower box body is fixedly connected with a lower connecting bracket, and the upper box body is fixedly provided with an upper connecting bracket; the top end and the bottom end of the lower box body are both open, the top end of the lower box body is fixedly connected with the protection tube, and the lower box body is not communicated with the inner space of the protection tube; the top end and the bottom end of the upper box body are both open, a strip-shaped communication hole is formed in the protection tube to communicate the internal space of the protection tube with the internal space of the upper box body, and a closed cover plate for closing the top end opening of the upper box body is also fixed at the bottom of the upper box body; the upper box body is internally provided with a rectangular frame-shaped supporting convex edge, a bearing film is fixed at the supporting convex edge, a vertical plate is also fixed in the upper box body, two ends of the vertical plate are fixed with the inner side wall of the upper box body, the vertical plate is provided with a through groove penetrating through the top end and the bottom end of the vertical plate, a piston part is also arranged in the upper box body, a plugboard capable of being inserted into the through groove is fixed at the piston part, and a cutter is arranged at the bottom end of the plugboard; the upper box body is characterized in that the outer side wall of the upper box body is fixedly provided with a gas storage container through a mounting frame, the gas storage container is communicated with a space between the piston part and the sealing cover plate of the upper box body through a connecting pipe, a first electromagnetic valve is arranged at the connecting pipe, and fire extinguishing sand is filled in the space between the bearing film and the piston part in the upper box body; the two cutters are arranged, cutting edges capable of cutting the bearing film are arranged below the cutters, one end, close to the end cap, of each cutting edge is lower than one end, far away from the end cap, of each cutting edge, and the cutting edges of the two cutters are distributed in an inverted V shape; the bottom of the air bag is cambered when the air bag is full of air, and the midpoint of the bottom of the air bag is positioned at the lowest position of the air bag; the top end of the piston part is provided with a transverse reinforcing convex rib and a longitudinal reinforcing convex rib; the bearing film is provided with a plurality of mutually parallel reinforcing strips.
2. The high-efficiency insulated flame-retardant power cable according to claim 1, wherein the cable body comprises an outer sheath, an armor layer, an outer flame-retardant layer, a shielding layer and an inner sheath in sequence from outside to inside, wherein the inner sheath comprises a plurality of cable cores, and the cable cores comprise a copper conductor, an insulating layer and an inner flame-retardant layer in sequence from inside to outside.
3. The high efficiency insulated flame retardant power cable of claim 1, wherein the flame retardant is fire extinguishing sand.
4. The high efficiency insulated flame retardant power cable of claim 2, wherein the inner sheath is a polyethylene inner sheath, the inner flame retardant layer is a low smoke, halogen free flame retardant layer, and the outer flame retardant layer is a flame retardant taping layer.
5. The efficient insulating flame-retardant power cable according to claim 1, wherein the protection tube is further connected with an air outlet elbow, one end of the air outlet elbow connected with the protection tube is located in the lower box body, the other end of the air outlet elbow is provided with a second electromagnetic valve, and the other end of the air outlet elbow is higher than the upper surface of the supporting convex edge.
6. A high efficiency insulated flame retardant power cable as set forth in claim 5, wherein said air outlet elbow passes through said lower box; the two air outlet bent pipes are fixedly connected with the strip-shaped plate, and the strip-shaped plate is fixedly connected with the upper box body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10224938A (en) * | 1997-02-05 | 1998-08-21 | Hitachi Cable Ltd | Sheath interrupter |
| JP2015142478A (en) * | 2014-01-30 | 2015-08-03 | 昭和電線ケーブルシステム株式会社 | Intermediate connection of protective tube and power cable |
| CN111403090A (en) * | 2020-03-11 | 2020-07-10 | 扬州曙光电缆股份有限公司 | Special cables for the harsh environment of the third-generation nuclear power plant |
| CN214476471U (en) * | 2021-02-08 | 2021-10-22 | 江西广通电缆股份有限公司 | Acid and alkali resistant fireproof cable for steamship |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9838773B2 (en) * | 2013-04-09 | 2017-12-05 | Audix Corporation | Microphone cable adaptor and plenum seal |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10224938A (en) * | 1997-02-05 | 1998-08-21 | Hitachi Cable Ltd | Sheath interrupter |
| JP2015142478A (en) * | 2014-01-30 | 2015-08-03 | 昭和電線ケーブルシステム株式会社 | Intermediate connection of protective tube and power cable |
| CN111403090A (en) * | 2020-03-11 | 2020-07-10 | 扬州曙光电缆股份有限公司 | Special cables for the harsh environment of the third-generation nuclear power plant |
| CN214476471U (en) * | 2021-02-08 | 2021-10-22 | 江西广通电缆股份有限公司 | Acid and alkali resistant fireproof cable for steamship |
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