CN114999720B - Fire-resistant control cable - Google Patents
Fire-resistant control cable Download PDFInfo
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- CN114999720B CN114999720B CN202210670643.1A CN202210670643A CN114999720B CN 114999720 B CN114999720 B CN 114999720B CN 202210670643 A CN202210670643 A CN 202210670643A CN 114999720 B CN114999720 B CN 114999720B
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- 230000009970 fire resistant effect Effects 0.000 title claims abstract description 22
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 76
- 229920000742 Cotton Polymers 0.000 claims abstract description 58
- 229910052751 metal Inorganic materials 0.000 claims abstract description 55
- 239000002184 metal Substances 0.000 claims abstract description 55
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 38
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 38
- 239000003365 glass fiber Substances 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 31
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003063 flame retardant Substances 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 26
- 239000010425 asbestos Substances 0.000 claims abstract description 17
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 58
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 58
- 239000007788 liquid Substances 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 35
- 239000000110 cooling liquid Substances 0.000 claims description 29
- 239000012188 paraffin wax Substances 0.000 claims description 25
- 239000011521 glass Substances 0.000 claims description 23
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 9
- 230000007480 spreading Effects 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 13
- 238000003825 pressing Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 230000006378 damage Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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Images
Classifications
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- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
- A62C35/10—Containers destroyed or opened by flames or heat
-
- 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
-
- 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
- H01B7/36—Insulated conductors or cables characterised by their form with distinguishing or length marks
- H01B7/365—Insulated conductors or cables characterised by their form with distinguishing or length marks being indicia imposed on the insulation or conductor
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
The invention discloses a fire-resistant control cable, which relates to the technical field of cables and comprises an outer flame-retardant layer, an outer metal sleeve and an inner metal sleeve, wherein a dry powder layer is arranged at the inner side of the outer flame-retardant layer, steel wires are uniformly inserted into the dry powder layer, an asbestos heat insulation layer is arranged at the inner side of the dry powder layer, a vacuum layer is arranged in the asbestos heat insulation layer, a glass fiber cotton layer is arranged in the vacuum layer, a control wire is arranged in the glass fiber cotton layer, a central area surrounded by the glass fiber cotton layer is filled with dry powder, the outer metal sleeve is sleeved at the outer side of the outer flame-retardant layer, the fire can be timely restrained from spreading when a fire occurs, the fire can be restrained from spreading between two adjacent carbon dioxide storage devices, the fire can be effectively restrained from spreading, the better heat dissipation effect is achieved, the number of the end part of the control wire can be protected after the fire occurs, and the wire connection is convenient.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a fire-resistant control cable.
Background
The remote transmission of electric power is the assurance of our life, but some sudden fires can cause paralysis of circuit system, even cause whole electric wire netting to owing to harm is great, and later stage repair work is more time-consuming and laborious, brings the degree of difficulty for people's power consumption, therefore it is very necessary to use flame retardant cable to reduce the damage of conflagration, and the control cable is the control line of multicore, all prints different serial numbers on every solitary control line, in order to according to the different terminal of different serial numbers to electrical components, and then produces required control effect.
The invention patent with the application number of CN201710753778.3 discloses a flame-retardant cable, which comprises a flame-retardant shell, a carbon dioxide heat insulation plate, a carbon dioxide compression chamber, metal retaining walls, air injection grooves, air nozzles, sealing strips, a dry powder layer, steel wires, an asbestos heat insulation layer, a vacuum layer, a glass fiber cotton layer and a control wire core, wherein the carbon dioxide heat insulation plate is arranged on the flame-retardant shell, the carbon dioxide compression chamber is arranged inside the carbon dioxide heat insulation plate, the metal retaining walls are arranged on the upper side and the lower side of the carbon dioxide compression chamber, the air injection grooves are arranged on the left side and the right side of the carbon dioxide compression chamber, and the air nozzles are arranged in the air injection grooves. The flame-retardant cable is provided with the dry powder layer and the carbon dioxide heat insulation board, and the dry powder and the carbon dioxide can play a role in extinguishing fire and preventing fire spreading under the condition that the outer layer is broken when the fire is delayed, thereby bringing convenience to later fire-fighting work, ensuring the safety of a circuit to the greatest extent, and avoiding short circuit of the circuit for some small fires.
However, in the use process, after a fire disaster occurs, the fire can only be extinguished after the fire disaster spreads to the device for storing the carbon dioxide, and the sealing element at the end part is burned and melted, so that the fire disaster can not be restrained in time, and the two adjacent carbon dioxide storage devices can not be rescued mutually, thereby increasing the damage degree of the cable; the heat dissipation effect is poor, and the heat of the control wire is difficult to dissipate in a high-temperature environment, so that the service life is influenced; in addition, when a fire disaster occurs, the number at the end part of the control line is easy to be damaged, and the connection and the overhaul of the control line are inconvenient.
Disclosure of Invention
The invention aims to overcome the existing defects, provides the fire-resistant control cable, can inhibit the spread of fire in time when the fire occurs, can mutually inhibit the spread of fire between two adjacent carbon dioxide storage devices, has a good heat dissipation effect, can protect the number at the end part of a control line after the fire occurs, is convenient for wiring and overhauling, and can effectively solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a fire resistant control cable comprising:
the glass fiber reinforced plastic composite material comprises an outer flame retardant layer, an outer metal sleeve and an inner metal sleeve, wherein a dry powder layer is arranged on the inner side of the outer flame retardant layer, steel wires are uniformly inserted into the dry powder layer, an asbestos heat insulation layer is arranged on the inner side of the dry powder layer, a vacuum layer is arranged in the asbestos heat insulation layer, a glass fiber cotton layer is arranged in the vacuum layer, a control wire is arranged in the glass fiber cotton layer, and a central area surrounded by the glass fiber cotton layer is filled with dry powder;
the outer metal sleeve is sleeved on the outer side of the outer flame-retardant layer, the inner metal sleeve is arranged on the outer flame-retardant layer and corresponds to the outer metal sleeve, an annular aluminum cylinder is arranged between the outer metal sleeve and the inner metal sleeve, compressed carbon dioxide gas is filled in the annular aluminum cylinder, air nozzles are uniformly arranged at two ends of the annular aluminum cylinder respectively, an opening and closing assembly is arranged on the air nozzles, and a sealing assembly is arranged at the end part of the outer metal sleeve;
the inside of annular aluminum cylinder is equipped with the reservoir, the one end that annular aluminum cylinder was kept away from to the reservoir passes dry powder layer and asbestos thermal insulation layer in proper order and extends to the glass fiber cotton layer, the intussuseption of reservoir is filled with the coolant liquid, be equipped with supply assembly in the reservoir, the side of reservoir is equipped with protective component.
When a fire condition occurs around the end part of the cable and the cable is not ignited, the temperature and the pressure in the annular aluminum cylinder are increased, and when the ambient temperature is lower than the temperature at which the sealing assembly is damaged, the cooling liquid is discharged out of the liquid storage tank through the supply assembly, one part of the cooling liquid enters the glass fiber cotton layer to cool the control line, and the other part of the cooling liquid protects the number printed on the end part of the control line through the protection assembly; when the cable is ignited, the temperature and the pressure in the annular aluminum cylinder are further increased, the ambient temperature reaches the temperature at which the sealing component is damaged, and the carbon dioxide gas is sprayed out.
Compared with the prior art, the invention has the following advantages:
1. when fire occurs nearby the annular aluminum cylinder and the cable is not ignited, the ambient temperature rises, the temperature and the pressure inside the annular aluminum cylinder are increased, at the moment, the ambient temperature is less than the melting temperature of paraffin, the sealing is not destroyed, the heat insulation plate is forced to slide downwards, the pressure lever can be driven to move downwards due to the soft texture of the glass fiber cotton layer, the rubber plate is separated from the sealing groove, the liquid draining hole is opened, cooling liquid in the liquid storage tank is discharged to the glass fiber cotton layer through the liquid draining hole, the glass fiber cotton layer only can absorb part of cooling liquid due to lower water absorption of the glass fiber cotton in the glass fiber cotton layer, and the rest of cooling liquid discharged spreads to the periphery of the glass fiber cotton layer, so that the glass fiber cotton layer is directly contacted with the control wire, the control wire can be cooled, and meanwhile, the flame retardant property of the cable is improved.
2. The glass cotton sleeve is sleeved on a control line with the end part of the cable exposed to the outside, the glass cotton sleeve corresponds to the number on the control line, part of cooling liquid can enter the guide pipe when being discharged from the liquid discharge hole, flows along the guide pipe, enters the glass cotton sleeve after reaching the end part of the guide pipe, the flame retardant effect of the end part of the control line exposed to the outside is improved by utilizing the flame retardance of the glass cotton sleeve, the number on the end part of the control line is protected, meanwhile, the number position of the end part of the control line is cooled by utilizing the cooling liquid absorbed by the glass cotton sleeve, the number is protected, serious damage is prevented, in addition, the cooling liquid flows in the guide pipe, meanwhile, the cooling of the inside of the cable is realized, after the cooling liquid reaches the glass cotton sleeve, part of cooling liquid can be absorbed to become wet, and dust and impurities generated by combustion around the part can be absorbed.
3. When the fire is further enhanced and the cable is ignited, the temperature and the pressure in the annular aluminum cylinder are further increased, meanwhile, the glass fiber cotton layer is pressed to the extreme by the pressing rod, the pressing rod can not move downwards any more, at the moment, because the paraffin melting point is lower, the paraffin at the end part is heated and quickly melts to damage the paraffin seal, the pressure in the annular aluminum cylinder is continuously increased, after the air pressure in the annular aluminum cylinder reaches a critical value, the cylinder plunger is punched out of the outer circular groove, the annular plate is ejected out through the ejector rod, the compressed carbon dioxide in the annular aluminum cylinder is ejected under the action of high pressure, the carbon dioxide concentration in the surrounding air is increased by utilizing the carbon dioxide gas ejected by high pressure, and meanwhile, the oxygen concentration in the surrounding air is reduced, so that the purpose of inhibiting the fire is achieved, the fire is prevented from spreading, and the pressure in the annular aluminum cylinder is quickly reduced.
4. When a large fire occurs near one of the annular aluminum cylinders between the two adjacent annular aluminum cylinders, paraffin at the end part of the other annular aluminum cylinder adjacent to the annular aluminum cylinder is gradually heated and melted, namely, the seal formed by the paraffin is destroyed, and after the pressure in the annular aluminum cylinder reaches a critical value, carbon dioxide in the annular aluminum cylinder is sprayed out to inhibit the fire, so that the two adjacent annular aluminum cylinders are rescued from each other, the fire is timely inhibited, and the fire is prevented from spreading.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is an enlarged schematic view of the structure of the present invention at A;
FIG. 4 is an enlarged schematic view of the structure of the present invention at B;
fig. 5 is an enlarged schematic view of the structure of the present invention at C.
In the figure: 1. an outer flame retardant layer; 11. a dry powder layer; 12. a steel wire; 13. an asbestos thermal insulation layer; 14. a glass fiber cotton layer; 15. a control line; 16. a dry powder; 2. an outer metal sleeve; 201. an inner metal sleeve; 21. an annular aluminum cylinder; 22. an air tap; 23. a liquid storage tank; 24. a cooling liquid; 3. a seal assembly; 31. a baffle ring; 32. an annular plate; 33. paraffin wax; 4. an opening and closing assembly; 41. an outer circular groove; 42. an inner circular groove; 43. a sealing plug; 44. a round plunger; 45. a push rod; 5. a supply assembly; 51. a heat insulating plate; 52. a liquid discharge hole; 53. sealing grooves; 54. a compression bar; 55. a rubber plate; 6. a protective assembly; 61. a glass cotton sleeve; 62. a catheter.
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.
First embodiment:
referring to fig. 1-4, the present embodiment provides a technical solution: a fire resistant control cable comprising:
the inner side of the outer flame retardant layer 1, the outer metal sleeve 2 and the inner metal sleeve 201 are provided with a dry powder layer 11, steel wires 12 are uniformly inserted into the dry powder layer 11, an asbestos thermal insulation layer 13 is arranged on the inner side of the dry powder layer 11, a glass fiber cotton layer 14 is arranged in the asbestos thermal insulation layer 13, a control wire 15 is arranged in the glass fiber cotton layer 14, a central area surrounded by the control wire 15 is filled with dry powder, the outer flame retardant layer 1 can prevent spread of fire, after the fire is burnt to the dry powder layer 11, the dry powder can be used for inhibiting the fire, the steel wires 12 can increase toughness and strength of a cable, the asbestos thermal insulation layer 13 can utilize good heat insulation effect of asbestos itself to prevent high temperature from invading the control wire in the middle, the glass fiber cotton layer 14 can utilize good insulation property of the glass fiber cotton itself, heat resistance and corrosion resistance, and protection to the middle control wire 15 is further enhanced.
The outer metal sleeve 2 is sleeved on the outer side of the outer flame-retardant layer 1, the inner metal sleeve 201 is arranged on the outer flame-retardant layer 1 and corresponds to the outer metal sleeve 2, an annular aluminum cylinder 21 is arranged between the outer metal sleeve 2 and the inner metal sleeve 201, compressed carbon dioxide gas is filled in the annular aluminum cylinder 21, and air nozzles 22 are respectively and uniformly arranged at two ends of the annular aluminum cylinder 21;
the inside of annular aluminium section of thick bamboo 21 is equipped with reservoir 23, and the one end that annular aluminium section of thick bamboo 21 was kept away from to reservoir 23 passes dry powder layer 11 and asbestos insulating layer 13 in proper order and extends to glass fibre cotton layer 14, and the reservoir 23 intussuseption is filled with coolant liquid 24, is equipped with supply assembly 5 in the reservoir 23.
The supply assembly 5 comprises a heat insulation plate 51, a liquid drain hole 52, a sealing groove 53, a pressing rod 54 and a rubber plate 55, wherein the heat insulation plate 51 is slidably connected to the inner top of the liquid storage groove 23, the liquid drain hole 52 is formed in the inner bottom surface of the liquid storage groove 23, the sealing groove 53 is formed in the position corresponding to the liquid drain hole 52 on the bottom surface of the liquid storage groove 23, the pressing rod 54 is arranged on the bottom surface of the heat insulation plate 51, the bottom end of the pressing rod 54 penetrates through the middle part of the liquid drain hole 52, the rubber plate 55 is arranged on the bottom end of the pressing rod 54, the rubber plate 55 is correspondingly matched with the sealing groove 53, the heat insulation plate 51 seals the liquid storage groove 23 to prevent the cooling liquid 24 from leaking, meanwhile, the heat insulation plate 51 isolates the mutual transmission of the temperature between the annular aluminum cylinder 21 and the liquid storage groove 23, the cooling liquid 24 in the liquid storage groove 23 is prevented from absorbing the temperature in the annular aluminum cylinder 21, the pressure in the annular aluminum cylinder 21 is insufficient, the temperature of the cooling liquid 24 can be prevented from rising, and the cooling effect is reduced.
The outer metal sleeve 2 and the inner metal sleeve 201 are equidistantly sleeved on the outer flame-retardant layer 1, and only the inner metal sleeve 201 positioned at the end part is provided with a supply assembly 5 and a protection assembly 6.
The diameter of the compression bar 54 is one half of the diameter of the drain hole 52, and the compression bar 54 is smaller than the diameter of the drain hole 52, so that a sufficient drain space is provided for the cooling liquid 24 during draining.
When the cable is in use, fire occurs around the end of the cable and the cable is not ignited, the ambient temperature is increased, the internal temperature and pressure of the annular aluminum cylinder 21 are increased, at the moment, the ambient temperature is lower than the melting temperature of the paraffin 33, the sealing is not destroyed, the heat insulation plate 51 is forced to slide downwards, the pressure bar 54 can be driven to move downwards due to the soft texture of the glass fiber cotton layer 14, the rubber plate 55 is separated from the sealing groove 53, the liquid drain hole 52 is opened, the cooling liquid 24 in the liquid storage groove 23 is discharged to the glass fiber cotton layer 14 through the liquid drain hole 52, the glass fiber cotton layer 14 only can absorb part of the cooling liquid 24 due to low water absorption of the glass fiber cotton in the glass fiber cotton layer 14, the discharged rest of the cooling liquid 24 spreads to the periphery of the glass fiber cotton layer 14, and the glass fiber cotton layer 14 is directly contacted with the control wire 15, so that the control wire 15 can be cooled, and the flame retardant property of the cable is increased.
Second embodiment:
referring to fig. 1, 2 and 4, in the fire-resistant control cable provided by the first embodiment, in the actual use process, part of the cable control wires are more, in order to facilitate the connection with the outside and maintenance, the exposed end part of the control wire is generally printed with a number, when the fire occurs at the position of the end part of the control wire, the number of the end part of the control wire is easy to burn out, which causes difficulties for workers during maintenance or connection, in order to solve the problem, the fire-resistant cable further comprises a protection assembly 6, the protection assembly 6 comprises a glass cotton sleeve 61 and a conduit 62, the glass cotton sleeve 61 is sheathed at one end of the control wire 16 outside the outer fire-resistant layer 1, the glass cotton sleeve 61 covers the number printed at the end part of the control wire 16, one end of the conduit 62 is arranged at the side bottom of the liquid storage tank 23, and the other end of the conduit 62 passes through the asbestos thermal insulation layer 13 and is connected with the glass cotton sleeve 61.
When the glass cotton sleeve 61 is used, the glass cotton sleeve 61 is sleeved on the control line 15 with the end part of the cable exposed to the outside, the glass cotton sleeve 61 corresponds to the number on the control line 15, part of cooling liquid 24 enters the guide pipe 62 when being discharged from the liquid discharge hole 52, flows along the guide pipe 62, and enters the glass cotton sleeve 61 after the cooling liquid 24 reaches the end part of the guide pipe 62, the flame retardant effect of the end part of the control line 15 exposed to the outside is improved by utilizing the flame retardance of the glass cotton sleeve 61, the number on the end part of the control line 15 is protected, and meanwhile, the number position of the end part of the control line 15 is cooled by utilizing the cooling liquid 24 absorbed by the glass cotton sleeve 61, so that the number is protected, and serious number damage is prevented.
In addition, the cooling liquid 24 flows in the conduit 62, and simultaneously, the cooling of the inside of the cable is realized, and after the cooling liquid reaches the glass cotton sleeve 61, the glass cotton sleeve 61 can absorb part of the cooling liquid to become wet, so that dust and impurities generated by combustion around part can be adsorbed.
Third embodiment:
referring to fig. 1, 2 and 5, a fire-resistant control cable provided based on the second embodiment, when the fire is further increased during use, the fire is spread very rapidly, and it is difficult to prevent the rapid spread of the fire from developing only by means of implementation in the first embodiment and the second embodiment, in order to solve the problem, the fire-resistant control cable further comprises a sealing assembly 3, the sealing assembly 3 comprises a baffle ring 31, an annular plate 32 and paraffin 33, the baffle ring 31 is correspondingly arranged at both ends of the inner side of the outer metal sleeve 2 and both ends of the outer side of the inner metal sleeve 201, the baffle ring 31 on the outer metal sleeve 2 is correspondingly arranged at both ends of the outer metal sleeve 2 and the baffle ring 31 on the inner metal sleeve 201, the annular plate 32 is correspondingly detachably connected at both ends of the outer metal sleeve 2, the annular plates 32 at both sides are respectively attached to the outer sides of the baffle rings 31 at both sides, a gap is formed between the outer circumferential side of the annular plate 32 and the outer metal sleeve 2, the annular plate 32 is filled with paraffin 33 in a gap between the outer circumferential side surface of the annular plate 32 and the outer metal sleeve 2 and a gap between the inner circumferential side surface of the annular plate 32 and the inner metal sleeve 201, the paraffin 33 is filled in a molten state, the annular plate 32 is fixed after the paraffin 33 is solidified, the melting points of the paraffin 33 on two adjacent outer metal sleeves 2 are different, the tightness between the annular plate 32 and the baffle ring 31 is improved, the annular plate further comprises an opening and closing assembly 4, the opening and closing assembly 4 comprises an outer circular groove 41, an inner circular groove 42, a sealing plug 43 and a push rod 45, the outer circular groove 41 is formed in one end of the air tap 22, the inner circular groove 42 is formed in the end surface of the outer circular groove 41, the inner circular groove 42 is transparent, the sealing plug 43 is correspondingly matched in the outer circular groove 41, one end of the push rod 45 is arranged in the middle of the side surface of the sealing plug 43, and the other end of ejector pin 45 and the inboard fixed connection of annular slab 32, open and close subassembly 4 still includes plunger 44, and plunger 44 locates the side of sealing plug 43, and plunger 44 and interior circular slot 42 correspond the cooperation, and sealing plug 43 and the corresponding cooperation of outer circular slot 41 can seal interior circular slot 42, simultaneously, utilize plunger 44 and the corresponding cooperation of interior circular slot 42, further improve the sealed effect of air cock 22.
When the cable is used, when fire is further enhanced and ignited, the temperature and pressure in the annular aluminum cylinder 21 are further increased, meanwhile, the glass fiber cotton layer 14 is pressed to the extreme by the pressing rod 54, the pressing rod 54 can not move downwards any more, at the moment, because the melting point of the paraffin 33 is lower, the paraffin 33 on the outer metal sleeve 2, which is close to one end of the fire, is heated and melted, the sealing of the paraffin 33 is broken, the pressure in the annular aluminum cylinder 21 is continuously increased, the cylinder plunger 44 is flushed out of the outer circular groove 41 after the air pressure in the annular aluminum cylinder 21 reaches a critical value, the annular plate 32 is simultaneously ejected through the ejector rod 45, carbon dioxide gas compressed in the annular aluminum cylinder 21 is ejected under the action of high pressure, and the carbon dioxide gas is only ejected from the air nozzle 22, which is close to one end of the fire, of the annular aluminum cylinder 21, so that the carbon dioxide gas ejected by the high pressure is utilized, the carbon dioxide concentration in ambient air is increased, and the oxygen concentration in ambient air is reduced, thereby achieving the purpose of inhibiting fire, the fire spreading is prevented, at the moment, the pressure in the annular aluminum cylinder 21 is gradually reduced, and the pressing rod 54 is not reset upwards.
In addition, after a big fire occurs near one of the annular aluminum cylinders 21, the pressure and temperature in the annular aluminum cylinder 21 are rapidly increased, paraffin 33 is rapidly melted, internal carbon dioxide gas is rapidly expanded, carbon dioxide gas is rapidly ejected, fire suppression time is short, efficiency is low, at this time, the main factor of carbon dioxide gas ejection is that paraffin 33 is rapidly melted, sealing component 3 is difficult to bear the pressure in annular aluminum cylinder 21, the temperature and pressure in the other annular aluminum cylinder 21 adjacent to it are slowly increased, internal carbon dioxide gas is slowly expanded, paraffin 33 is slowly melted, but carbon dioxide gas is always expanded, because the duration of the expansion process is long, the volume of carbon dioxide gas after expansion is larger than that in the former annular aluminum cylinder 21, the air injection time in the annular aluminum cylinder 21 far away from the fire is long, and fire suppression time near the annular aluminum cylinder 21 near the fire is long.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. A fire resistant control cable comprising:
the inner side of the outer flame-retardant layer is provided with a dry powder layer, steel wires are uniformly inserted into the dry powder layer, the inner side of the dry powder layer is provided with an asbestos heat insulation layer, the inner side of the asbestos heat insulation layer is provided with a glass fiber cotton layer, the glass fiber cotton layer is internally provided with a control wire, and a central area surrounded by the control wire is filled with dry powder;
the outer metal sleeve is sleeved on the outer side of the outer flame-retardant layer, the inner metal sleeve is arranged on the outer flame-retardant layer and corresponds to the outer metal sleeve, an annular aluminum cylinder is arranged between the outer metal sleeve and the inner metal sleeve, compressed carbon dioxide gas is filled in the annular aluminum cylinder, air nozzles are uniformly arranged at two ends of the annular aluminum cylinder respectively, an opening and closing assembly is arranged on the air nozzles, and a sealing assembly is arranged at the end part of the outer metal sleeve;
the inner side of the annular aluminum cylinder is provided with a liquid storage groove, one end of the liquid storage groove, which is far away from the annular aluminum cylinder, sequentially penetrates through the dry powder layer and the asbestos heat insulation layer and extends to the glass fiber cotton layer, the liquid storage groove is filled with cooling liquid, the liquid storage groove is internally provided with a supply assembly, and the side surface of the liquid storage groove is provided with a protection assembly;
when a fire condition occurs around the end part of the cable and the cable is not ignited, the temperature and the pressure in the annular aluminum cylinder are increased, and when the ambient temperature is lower than the temperature at which the sealing assembly is damaged, the cooling liquid is discharged out of the liquid storage tank through the supply assembly, one part of the cooling liquid enters the glass fiber cotton layer to cool the control line, and the other part of the cooling liquid protects the number printed on the end part of the control line through the protection assembly; when the cable is ignited, the temperature and the pressure in the annular aluminum cylinder are further increased, the ambient temperature reaches the temperature at which the sealing component is damaged, and the carbon dioxide gas is sprayed out.
2. A fire resistant control cable according to claim 1, characterized in that: after a fire occurs near one of the annular aluminum cylinders, the carbon dioxide gas in the annular aluminum cylinder rapidly expands, the carbon dioxide gas is rapidly sprayed out, the time for suppressing the fire is short, the temperature and the pressure in the other annular aluminum cylinder adjacent to the annular aluminum cylinder slowly rise, the sealing assembly is damaged slowly, the carbon dioxide gas in the annular aluminum cylinder is slowly expanded, the volume of the expanded carbon dioxide gas is larger than the volume of the expanded carbon dioxide gas in the annular aluminum cylinder close to a fire condition, and the carbon dioxide gas of the annular aluminum cylinder is long in discharge time.
3. A fire resistant control cable according to claim 1, characterized in that: the sealing assembly comprises baffle rings, annular plates and paraffin, wherein the baffle rings are correspondingly arranged at two ends of the inner side of the outer metal sleeve and two ends of the outer side of the inner metal sleeve, the baffle rings on the outer metal sleeve correspond to the baffle rings on the inner metal sleeve, the annular plates are correspondingly and detachably connected at two ends of the outer metal sleeve, the annular plates at two sides are respectively attached to the outer sides of the baffle rings at two sides, gaps are reserved between the outer circumferential side surfaces of the annular plates and the outer metal sleeve, gaps are reserved between the inner circumferential side surfaces of the annular plates and the inner metal sleeve, and paraffin is filled in the gaps between the outer circumferential side surfaces of the annular plates and the outer metal sleeve and the gaps between the inner circumferential side surfaces of the annular plates and the inner metal sleeve.
4. A fire resistant control cable according to claim 3, characterized in that: and filling the paraffin when the paraffin is in a molten state, fixing the annular plate after the paraffin is solidified, and ensuring that the melting points of the paraffin on two adjacent outer metal sleeves are different.
5. A fire resistant control cable according to claim 3, characterized in that: the opening and closing assembly comprises an outer circular groove, an inner circular groove, a sealing plug and a push rod, wherein the outer circular groove is formed in one end of the air faucet, the inner circular groove is formed in the end face of the outer circular groove, the inner circular groove is transparent, the sealing plug is correspondingly matched with the outer circular groove, one end of the push rod is arranged in the middle of the side face of the sealing plug, and the other end of the push rod is fixedly connected with the inner side of the annular plate.
6. A fire resistant control cable according to claim 5, characterized in that: the opening and closing assembly further comprises a round plunger, the round plunger is arranged on the side face of the sealing plug, and the round plunger is correspondingly matched with the inner circular groove.
7. A fire resistant control cable according to claim 1, characterized in that: the feeding assembly comprises a heat insulation plate, a liquid drain hole, a sealing groove, a pressure bar and a rubber plate, wherein the heat insulation plate is slidably connected to the top of the inner side of the liquid storage groove, the liquid drain hole is formed in the inner bottom surface of the liquid storage groove, the sealing groove is formed in the position, corresponding to the liquid drain hole, of the bottom surface of the liquid storage groove, the pressure bar is arranged on the bottom surface of the heat insulation plate, the bottom end of the pressure bar penetrates through the middle of the liquid drain hole, the rubber plate is arranged at the bottom end of the pressure bar, and the rubber plate is correspondingly matched with the sealing groove.
8. A fire resistant control cable according to claim 1, characterized in that: the outer metal sleeve and the inner metal sleeve are equidistantly arranged on the outer flame-retardant layer, and only the inner metal sleeve positioned at the end part is provided with a supply assembly and a protection assembly.
9. A fire resistant control cable according to claim 7, characterized in that: the diameter of the pressure rod is one half of the diameter of the liquid discharge hole.
10. A fire resistant control cable according to claim 1, characterized in that: the protection component comprises a glass cotton sleeve and a conduit, wherein the glass cotton sleeve is sleeved at one end of the control line, which is positioned at the outer side of the outer flame-retardant layer, the glass cotton sleeve covers the numbers printed at the end part of the control line, one end of the conduit is arranged at the bottom of the side face of the liquid storage tank, and the other end of the conduit penetrates through the asbestos thermal insulation layer to be connected with the glass cotton sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210670643.1A CN114999720B (en) | 2022-06-13 | 2022-06-13 | Fire-resistant control cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210670643.1A CN114999720B (en) | 2022-06-13 | 2022-06-13 | Fire-resistant control cable |
Publications (2)
| Publication Number | Publication Date |
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| CN114999720A CN114999720A (en) | 2022-09-02 |
| CN114999720B true CN114999720B (en) | 2023-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210670643.1A Active CN114999720B (en) | 2022-06-13 | 2022-06-13 | Fire-resistant control cable |
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| Country | Link |
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| CN (1) | CN114999720B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107578851A (en) * | 2017-08-29 | 2018-01-12 | 嘉兴市天信电线有限公司 | A kind of flame retardant cable |
| CN212230131U (en) * | 2020-05-07 | 2020-12-25 | 江苏云雀环保科技有限公司 | Fire-resistant cable with high protection function |
| CN214796876U (en) * | 2021-04-09 | 2021-11-19 | 金德顺电缆有限公司 | Fire-resistant type environmental protection cable |
| CN113990563A (en) * | 2021-10-11 | 2022-01-28 | 温桂华 | Fireproof composite cable |
| CN114141416A (en) * | 2021-11-30 | 2022-03-04 | 河北麟达铝合金线材有限公司 | Fireproof cable |
-
2022
- 2022-06-13 CN CN202210670643.1A patent/CN114999720B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107578851A (en) * | 2017-08-29 | 2018-01-12 | 嘉兴市天信电线有限公司 | A kind of flame retardant cable |
| CN212230131U (en) * | 2020-05-07 | 2020-12-25 | 江苏云雀环保科技有限公司 | Fire-resistant cable with high protection function |
| CN214796876U (en) * | 2021-04-09 | 2021-11-19 | 金德顺电缆有限公司 | Fire-resistant type environmental protection cable |
| CN113990563A (en) * | 2021-10-11 | 2022-01-28 | 温桂华 | Fireproof composite cable |
| CN114141416A (en) * | 2021-11-30 | 2022-03-04 | 河北麟达铝合金线材有限公司 | Fireproof cable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114999720A (en) | 2022-09-02 |
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Address after: No.1 Jingwu Road, Linying County, Luohe City, Henan Province Patentee after: Hongfeng Cable Co.,Ltd. Address before: No.1 Jingwu Road, Linying County, Luohe City, Henan Province Patentee before: Hongfeng Cable Co.,Ltd. |