CN113851265A - Fire-resistant cable for electric power - Google Patents
Fire-resistant cable for electric power Download PDFInfo
- Publication number
- CN113851265A CN113851265A CN202111181704.XA CN202111181704A CN113851265A CN 113851265 A CN113851265 A CN 113851265A CN 202111181704 A CN202111181704 A CN 202111181704A CN 113851265 A CN113851265 A CN 113851265A
- Authority
- CN
- China
- Prior art keywords
- positioning
- insulating layer
- fire
- splicing block
- outer insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
-
- 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
- H01B7/17—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
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
-
- 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
-
- 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
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention relates to the field of power transmission, in particular to a fire-resistant cable for power, which comprises a wire core, wherein an inner insulating layer and an outer insulating layer are sleeved outside the wire core, and a cavity is arranged between the inner insulating layer and the outer insulating layer; a plurality of trigger mechanisms are installed on the outer wall of the outer insulating layer, and a bridge is further arranged outside the outer insulating layer. The invention aims to provide a fire-resistant cable for electric power, which solves the problems that the common fire-resistant coating is only difficult to burn and cannot actively cool and extinguish fire, and the inner wire core of the fire-resistant coating can still contact a fire source after the fire-resistant limit time. The existing bridge frame is generally a rigid framework, such as metal alloy and the like, when the bridge frame is erected indoors, more obstacles such as wall columns and corners can be met, when the obstacles are met, the direction of the obstacles needs to be changed to bypass the obstacles, the bridge frame needs to be cut off and cut, an interface needs to be additionally fixed during installation, and the operation is troublesome.
Description
Technical Field
The invention relates to the field of power transmission, in particular to a fire-resistant cable for power.
Background
The fire-resistant cable is a cable capable of keeping safe operation for a certain time under the condition of flame combustion, and is widely applied to places related to fire safety and fire-fighting lifesaving, such as high-rise buildings, underground railways, underground streets, large-scale power stations, important industrial and mining enterprises and the like, for example, power supply lines and control lines of emergency facilities such as fire-fighting equipment, emergency guide lamps and the like.
Ordinary cable fire prevention generally is to increase one deck flame retardant coating for the cable for increase the fire resistance of cable, but general fire prevention coating can only accomplish not hard burning, can not initiatively cool down and put out a fire, and when the intensity of a fire duration is longer, fire prevention coating is after the fire endurance time, inside sinle silk still can contact the fire source. At present, part of cables can use the bridge, the protection of the cables in the aspects of flame retardance and fire prevention plays a good role, but the bridge is generally a rigid framework, such as metal alloy and the like, the bridge can meet more obstacles such as wall columns and corners when being erected indoors, when the obstacles are met, the direction of the obstacles needs to be changed to bypass the obstacles, the bridge needs to be cut off and cut, and an interface needs to be additionally fixed during installation, so that the operation is troublesome.
Disclosure of Invention
The invention aims to provide a fire-resistant cable for electric power, which solves the problems that the common fire-resistant coating is only difficult to burn and cannot actively cool and extinguish fire, and when the duration of fire is long and the fire-resistant coating is in the fire-resistant limit time, the inner wire core can still contact a fire source. At present, a part of cables can use a bridge frame, so that the cable is well protected in the aspects of flame retardance and fire prevention, but the bridge frame is generally a rigid framework, such as metal alloy and the like, when the bridge frame is erected indoors, more obstacles, such as wall columns, corners and the like, can be encountered, when the obstacles are encountered, the direction of the obstacles needs to be changed to bypass the obstacles, the bridge frame needs to be cut off and cut, and an interface needs to be additionally fixed during installation, so that the operation is troublesome.
In order to achieve the purpose, the invention provides the following technical scheme:
a fire-resistant cable for electric power comprises a wire core, wherein an inner insulating layer is sleeved outside the wire core, an outer insulating layer is sleeved outside the inner insulating layer, and a cavity is formed between the inner insulating layer and the outer insulating layer; the outer insulating layer is connected with a pressure relief pipe, one end of the pressure relief pipe is communicated with the cavity, the other end of the pressure relief pipe is connected with the liquid storage tank, and a first pressure relief valve is arranged at one end, close to the liquid storage tank, of the pressure relief pipe; a second pressure relief valve is arranged on the outer insulating layer, a water pipe is connected to the liquid storage tank, and the other end of the water pipe is communicated with the cavity; one end of the water pipe close to the liquid storage tank is provided with a water pump and a water valve;
the outer wall of the outer insulating layer is also provided with a plurality of trigger mechanisms, each trigger mechanism comprises a fixed box, one end of each fixed box, which is far away from the outer insulating layer, is in an open shape, two rotating shafts are arranged inside each fixed box, two ends of each rotating shaft are rotatably connected with the inner walls of two sides of the fixed box, a first transverse rod is fixedly connected to each rotating shaft, molten plastic is arranged between the two first transverse rods, two ends of the molten plastic are respectively connected with the end surfaces of the two first transverse rods, one side of each rotating shaft, which is close to the outer insulating layer, is also fixedly connected with an inclined rod, one side of each inclined rod is connected with the inner wall of one end of each fixed box through a first spring, a switch is arranged above one of the two inclined rods, and the switch is opened when the inclined rods rotate around the rotating shafts; second cross rods are arranged above the two first cross rods and are rotatably connected with the two sides of the fixed box through pin shafts, the far ends of the two second cross rods are rotatably connected with the first cross rods through vertical rods, a sealing column is arranged between the two second cross rods, the bottom of the sealing column is rotatably connected with the two second cross rods respectively, the top of the sealing column penetrates through the outer insulating layer, and the sealing column is slidably connected with the outer insulating layer;
the bridge is also arranged outside the outer insulating layer and is formed by splicing a plurality of groups of first splicing blocks, second splicing blocks and third splicing blocks, each first splicing block consists of a rectangular plate and two triangular plates arranged at two ends of the rectangular plate, two fixed shafts are arranged at positions, close to the edge, of one side of each first splicing block, and a fixed shaft sleeve is correspondingly arranged at the other side of each first splicing block; a triangular plate of the first splicing block is connected with a positioning mechanism, the positioning mechanism is fixedly connected with the first splicing block through a connecting rod, a second positioning hole is formed below the connecting rod, and a first positioning hole is formed in the other triangular plate.
Preferably, the positioning mechanism comprises a positioning prism, positioning rod grooves are formed in four circumferential surfaces of the positioning prism, positioning rods are arranged in the positioning rod grooves, a positioning plate is sleeved outside one end of the positioning prism and is in sliding connection with the positioning prism, a fixing column is arranged on one side, away from the positioning rod, of the positioning plate, a sliding block is arranged inside the positioning prism and is in sliding connection with the positioning prism, and the sliding block penetrates through one end, with the positioning plate, of the positioning prism; the one end that the locating plate was kept away from to the locating lever rotates through round pin axle and locating lever groove lateral wall to be connected, and one side that the locating lever is close to the sliding block is connected with the second spring, and the second spring other end and locating lever tank bottom fixed connection still are equipped with round pin post and stay cord between locating lever and the sliding block, round pin post both ends and locating lever groove lateral wall fixed connection, stay cord one end and locating lever fixed connection, the other end and sliding block fixed connection, and stay cord middle part and round pin post contact.
Preferably, the first splicing block, the second splicing block and the third splicing block have the same structure, the second splicing block is arranged between the first splicing block and the third splicing block, and the third splicing block and the first splicing block are alternately arranged.
Preferably, the front end of the sealing column is solid, and the middle part and the rear end of the sealing column are longitudinally provided with through grooves.
Preferably, the trigger mechanisms are vertically arranged below the outer insulating layer, and the interval between each two trigger mechanisms is the same.
Preferably, partitions are arranged in the middle of the cavity in the outer insulating layer at intervals, and each cavity is communicated with the liquid storage tank.
Preferably, the switch is connected with the water pump and the water valve, and the water pumping amount of the water pump per unit time is in direct proportion to the number of the switches which are turned on.
The invention has the beneficial effects that:
(1) when fire does not happen, the liquid nitrogen can slowly and naturally evaporate, when the pressure in the liquid storage tank is higher, the first pressure release valve is opened, the nitrogen enters the cavity, when the air pressure in the cavity is higher, the second pressure release valve is opened, the nitrogen enters the bridge frame, and the content of the nitrogen in and around the bridge frame is increased, so that the content of oxygen around the bridge frame is reduced, and the effect of preventing combustion is achieved to a certain extent;
(2) when fire occurs, the flame generally rises from bottom to top, the trigger mechanism is firstly baked by the fire and continuously heated, when the temperature reaches the melting point of the molten plastic, the joint of the molten plastic and the first cross rod is molten, the molten plastic is separated from the connection state, the first spring can push the inclined rod to enable the inclined rod to rotate along the rotating shaft to drive the first cross rod to rotate, the first cross rod pulls the vertical rod to move downwards, the vertical rod moves downwards to pull one end of the second cross rod to enable the second cross rod to rotate along the pin shaft, the other end of the second cross rod pushes the sealing column upwards, the sealing column moves upwards, the through groove part rises and is communicated with the cavity; when the down tube rotated along the pivot, the switch was opened to the lifter, made the water valve open, and the water pump began work simultaneously, in pumping the liquid nitrogen pump in the liquid storage pot into the cavity, for the line core cooling, part liquid nitrogen flowed down from the sealed post that shifts up simultaneously, and a large amount of heats are taken away in the evaporation of liquid nitrogen, play the effect of putting out a fire, also can produce a large amount of nitrogen gases in the evaporation of liquid nitrogen, reduce the oxygen content around the ignition point, also play fire-retardant effect. If the intensity of a fire is great, have melting plastics among a plurality of trigger mechanisms to melt, the pump water yield of water pump unit interval increases, all can increase the cooling effect and the fire extinguishing effect of sinle silk.
(3) When erecting the bridge frame, the bridge frame with a preset length is spliced firstly. When an obstacle needs to be bypassed, the positioning mechanism on the first splicing block is firstly pressed to enable the sliding block to move inwards, the sliding block pulls the pull rope and the positioning rod to enable one end of the positioning rod close to the positioning plate to approach to the direction of the sliding block, then the positioning prism can be pulled out, the positioning prism on the second splicing block is pulled out by the same operation, then the second splicing block is taken down, the third splicing block is rotated along the fixed shaft of the second splicing block, the third splicing block is abutted against the triangular plate of the first splicing block, the positioning prism on the first splicing block is inserted into the second positioning hole on the third splicing block, the first splicing block and the third splicing block are fixed, so as to achieve the effect of bending the bridge frame, if a larger bending angle is needed, other second splicing blocks can be taken down in the same mode, the operation is very simple, and the phenomenon that the whole bridge frame is cut by workers is avoided.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of a cable construction of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1 according to the present invention;
FIG. 3 is a schematic view of a bridge structure of the present invention;
FIG. 4 is a schematic diagram of the first tile structure shown in FIG. 3 according to the present invention;
FIG. 5 is a schematic view of the positioning mechanism of FIG. 4 according to the present invention;
FIG. 6 is a schematic view of the connection between the sliding block and the positioning rod shown in FIG. 5;
in the figure: 1. a wire core; 2. an inner insulating layer; 3. a cavity; 4. an outer insulating layer; 5. a liquid storage tank; 6. a pressure relief pipe; 7. a first pressure relief valve; 8. a water pipe; 9. a water pump; 10. a water valve; 11. a second pressure relief valve; 12. a trigger mechanism; 13. a bridge frame; 14. a fixing box; 15. a first cross bar; 16. melting the plastic; 17. a rotating shaft; 18. a diagonal bar; 19. a first spring; 20. erecting a rod; 21. a second cross bar; 22. a pin shaft; 23. a switch; 24. sealing the column; 25. a first splice block; 26. a positioning mechanism; 27. a second positioning hole; 28. a first positioning hole; 29. a fixed shaft; 30. fixing the shaft sleeve; 31. positioning a prism; 32. a positioning rod groove; 33. positioning a rod; 34. positioning a plate; 35. a slider; 36. pulling a rope; 37. a second spring; 38. a second splice block; 39. a third splicing block; 40. and (4) a pin.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-6, the fire-resistant cable for electric power according to the present invention includes a core 1, an inner insulating layer 2 is sleeved outside the core 1, an outer insulating layer 4 is sleeved outside the inner insulating layer 2, and a cavity 3 is disposed between the inner insulating layer 2 and the outer insulating layer 4; a pressure relief pipe 6 is connected to the outer insulating layer 4, one end of the pressure relief pipe 6 is communicated with the cavity 3, the other end of the pressure relief pipe is connected with the liquid storage tank 5, and a first pressure relief valve 7 is installed at one end, close to the liquid storage tank 5, of the pressure relief pipe 6; a second pressure release valve 11 is arranged on the outer insulating layer 4, a water pipe 8 is also connected to the liquid storage tank 5, and the other end of the water pipe 8 is communicated with the cavity 3; one end of the water pipe 8 close to the liquid storage tank 5 is provided with a water pump 9 and a water valve 10;
the outer wall of the outer insulating layer 4 is further provided with a plurality of trigger mechanisms 12, each trigger mechanism 12 comprises a fixed box 14, one end, far away from the outer insulating layer 4, of each fixed box 14 is in an open shape, two rotating shafts 17 are arranged inside each fixed box 14, two ends of each rotating shaft 17 are rotatably connected with inner walls on two sides of each fixed box 14, a first cross rod 15 is fixedly connected onto each rotating shaft 17, a molten plastic 16 is arranged between the two first cross rods 15, two ends of each molten plastic 16 are respectively connected with end faces of the two first cross rods 15, one side, close to the outer insulating layer 4, of each rotating shaft 17 is also fixedly connected with an inclined rod 18, one side of each inclined rod 18 is connected with the inner wall on one end of each fixed box 14 through a first spring 19, a switch 23 is arranged above one of the two inclined rods 18, and the switch 23 is opened when the inclined rods 18 rotate around the rotating shafts 17; a second cross rod 21 is arranged above the two first cross rods 15, the second cross rods 21 are rotatably connected with two sides of the fixed box 14 through pin shafts 22, the ends, far away from the two second cross rods 21, of the two second cross rods 21 are rotatably connected with the first cross rods 15 through upright rods 20, a sealing column 24 is arranged between the two second cross rods 21, the bottom of the sealing column 24 is rotatably connected with the two second cross rods 21 respectively, the top of the sealing column 24 penetrates through the outer insulating layer 4, and the sealing column 24 is in sliding connection with the outer insulating layer 4;
the bridge frame 13 is also arranged outside the outer insulating layer 4, the bridge frame 13 is formed by splicing a plurality of groups of first splicing blocks 25, second splicing blocks 38 and third splicing blocks 39, each first splicing block 25 consists of a rectangular plate and two triangular plates arranged at two ends of the rectangular plate, two fixed shafts 29 are arranged at positions, close to the edge, of one side of each first splicing block 25, and a fixed shaft sleeve 30 is correspondingly arranged at the other side of each first splicing block 25; a triangular plate of the first splicing block 25 is connected with a positioning mechanism 26, the positioning mechanism 26 is fixedly connected with the first splicing block 25 through a connecting rod, a second positioning hole 27 is formed below the connecting rod, and a first positioning hole 28 is formed in the other triangular plate.
As a technical optimization scheme of the invention, the positioning mechanism 26 comprises a positioning prism 31, positioning rod grooves 32 are formed in four circumferential surfaces of the positioning prism 31, a positioning rod 33 is arranged in each positioning rod groove 32, a positioning plate 34 is sleeved outside one end of the positioning prism 31, the positioning plate 34 is connected with the positioning prism 31 in a sliding mode, a fixed column is arranged on one side, away from the positioning rod 33, of the positioning plate 34, a sliding block 35 is arranged inside the positioning prism 31, the sliding block 35 is connected with the positioning prism 31 in a sliding mode, and the sliding block 35 penetrates through one end, with the positioning plate 34, of the positioning prism 31; one end of the positioning rod 33, which is far away from the positioning plate 34, is rotatably connected with the side wall of the positioning rod groove 32 through a pin shaft 22, one side of the positioning rod 33, which is close to the sliding block 35, is connected with a second spring 37, the other end of the second spring 37 is fixedly connected with the bottom of the positioning rod groove 32, a pin 40 and a pull rope 36 are further arranged between the positioning rod 33 and the sliding block 35, two ends of the pin 40 are fixedly connected with the side wall of the positioning rod groove 32, one end of the pull rope 36 is fixedly connected with the positioning rod 33, the other end of the pull rope is fixedly connected with the sliding block 35, and the middle part of the pull rope 36 is in contact with the pin 40. The positioning mechanism 26 is very convenient both for disassembly and for assembly and can continue to work after the first or second or third splice blocks 25, 38, 39 are disassembled.
As a technical optimization scheme of the invention, the first splicing block 25, the second splicing block 38 and the third splicing block 39 have the same structure, the second splicing block 38 is arranged between the first splicing block 25 and the third splicing block 39, and the third splicing block 39 and the first splicing block 25 are alternately arranged. Therefore, the second splicing block 38 can be taken down, the third splicing block 39 rotates along the fixed shaft 29, the third splicing block 39 is abutted to the triangular plate of the first splicing block 25, the positioning prism 31 on the first splicing block 25 is inserted into the second positioning hole 27 on the third splicing block 39, the first splicing block 25 and the third splicing block 39 are fixed, the bending effect of the bridge frame 13 is achieved, and when the bending angle is larger, other second splicing blocks 38 can be taken down in the same mode. When the reverse bending is needed, the first splicing block 25 or the third splicing block 39 is removed in the same way.
As a technical optimization scheme of the invention, the trigger mechanisms 12 are vertically arranged below the outer insulating layer 4, and the interval between every two trigger mechanisms 12 is the same. When meeting a fire, the flame generally rises from bottom to top, the trigger mechanism 12 is vertically arranged below the outer insulating layer 4, the trigger mechanism 12 is firstly baked by the fire, and the reaction is more sensitive.
As a technical optimization scheme of the invention, the front end of the sealing column 24 is solid, and the middle part and the rear end are longitudinally provided with through grooves. When the sealing post 24 moves upwards, the through groove part rises and can be communicated with the cavity 3, so that nitrogen and liquid nitrogen in the cavity 3 flow out to extinguish fire.
As a technical optimization scheme of the invention, the switch 23 is connected with the water pump 9 and the water valve 10, and the water pumping amount of the water pump 9 in unit time is in direct proportion to the number of the switches 23 which are turned on. When the fire is great, the melted plastics 16 in the plurality of trigger mechanisms 12 are melted, the water pump amount of the water pump 9 in unit time is increased, and the cooling effect and the fire extinguishing effect on the wire core 1 are increased; when the fire is small, the water pump amount of the water pump 9 in unit time is reduced, and the consumption of liquid nitrogen can be reduced.
As a technical optimization scheme of the invention, partitions are arranged in the middle of the cavities 3 in the outer insulating layer 4 at intervals, and each section of cavity 3 is communicated with a liquid storage tank 5. The cavity 3 is provided with partitions at intervals, when a fire disaster occurs, the temperature reaches the melting point of the melted plastic 16, and after the water pump 9 starts working, liquid nitrogen can flow to the position needing fire extinguishing more quickly, so that the reaction is quicker, and the fire extinguishing is carried out as early as possible.
The working principle is as follows: when the bridge frame 13 is erected, firstly, the bridge frame 13 with a preset length is spliced, during splicing, the fixed shaft sleeve 30 on one side of the first splicing block 25 is matched with the fixed shaft 29 on the third splicing block 39, the positioning mechanism 26 on the first splicing block 25 is positioned on the same side as the positioning mechanism 26 on the third splicing block 39, then the second splicing block 38 is inverted between the first splicing block 25 and the third splicing block 39, the positioning mechanism 26 on the second splicing block 38 and the positioning mechanism 26 on the first splicing block 25 are arranged in a manner of being opposite to each other, then the positioning mechanism 26 on the first splicing block 25 is inserted into the first positioning hole 28 on the second splicing block 38, after one side of the positioning plate 34 is abutted against the other side of the second splicing block 38 and abutted against the fixed column, under the action of the second spring 37, the four positioning rods 33 can be lifted to the outer side, the triangular plate of the second splicing block 38 is clamped between the positioning rods 33 and the positioning plate 34, the two-way positioning effect is achieved, the positioning mechanism 26 on the second splicing block 38 is inserted into the first positioning hole 28 on the third splicing block 39, and so on, and the connection and fixing modes of all the first splicing block 25, the second splicing block 38 and the third splicing block 39 are the same. When an obstacle needs to be passed around, the positioning mechanism 26 on the first splicing block 25 is firstly pressed to enable the sliding block 35 to move inwards, the sliding block 35 pulls the pull rope 36, the pull rope 36 pulls the positioning rod 33, one end, close to the positioning plate 34, of the positioning rod 33 is enabled to be close to the sliding block 35, the positioning prism 31 can then be pulled out, the same operation pulls out the positioning prism 31 on the second tile 38, then the second splicing block 38 is taken down, the third splicing block 39 is rotated along the fixed shaft 29, the third splicing block 39 is abutted against the triangular plate of the first splicing block 25, the positioning prism 31 on the first splicing block 25 is inserted into the second positioning hole 27 on the third splicing block 39, the first splicing block 25 and the third splicing block 39 are fixed, so as to achieve the effect of bending the bridge frame 13, if a greater bend angle is desired, the other second tiles 38 can be removed again in the same manner.
After the cable is laid, liquid nitrogen is added into the liquid storage tank 5, and the water pump 9 and the water valve 10 can be started to use after being electrified. When fire does not happen, liquid nitrogen slowly and naturally evaporates, when the pressure in the liquid storage tank 5 is high, the first pressure release valve 7 is opened, nitrogen enters the cavity 3, when the air pressure in the cavity 3 is high, the second pressure release valve 11 is opened, the nitrogen enters the bridge frame 13, and the content of the nitrogen in and around the bridge frame 13 is increased, so that the content of oxygen around the bridge frame is reduced, and the effect of preventing combustion is achieved to a certain extent;
when fire occurs, the flame generally rises from bottom to top, the trigger mechanism 12 is firstly baked by fire and continuously heated, when the temperature reaches the melting point of the molten plastic 16, the joint of the molten plastic 16 and the first cross rod 15 is molten, and the first spring 19 pushes the inclined rod 18 to enable the inclined rod 18 to rotate along the rotating shaft 17, because the inclined rod 18 is fixedly connected with the rotating shaft 17 and the rotating shaft 17 is fixedly connected with the first cross rod 15, the first cross rod 15 also rotates along with the first cross rod 15, the vertical rod 20 is pulled to move downwards while the first cross rod 15 rotates, the vertical rod 20 moves downwards to pull one end of the second cross rod 21, the second cross rod 21 rotates along the pin shaft 22, the other end of the second cross rod 22 pushes the sealing column 24 upwards, only the upper end of the sealing column 24 is solid, the middle part and the rear end of the sealing column 24 are provided with through grooves in the vertical direction, and the sealing column 24 moves upwards and the through grooves partially rise and are communicated with the cavity 3; when the sloping pole 18 rotated along pivot 17, open switch 23 made water valve 10 open, water pump 9 began to work simultaneously, in pumping the liquid nitrogen pump in the liquid storage pot 5 into cavity 3, for sinle silk 1 cooling, part liquid nitrogen flowed down from the sealed post 24 department that shifts up simultaneously, and a large amount of heats are taken away in the evaporation of liquid nitrogen, played the effect of putting out a fire, also can produce a large amount of nitrogen gas in the evaporation of liquid nitrogen, reduce the oxygen content around the ignition, also played fire-retardant effect. If the fire is great, have melting plastics 16 among a plurality of trigger mechanism 12 to melt, the pump water yield of water pump 9 unit interval increases, all can increase to the cooling effect and the fire extinguishing effect of sinle silk 1. When the fire is small, the water pump amount of the water pump 9 in unit time is reduced, and the consumption of liquid nitrogen can be reduced.
The pressure relief pipe 6 and the water pipe 8 both penetrate through the unused second positioning hole 27 on the bridge frame 13, so that additional punching is not needed when the bridge frame 13 is erected; the inner insulating layer 2 and the outer insulating layer 4 have a waterproof function.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A fire-resistant cable for electric power, characterized in that: the cable comprises a cable core (1), wherein an inner insulating layer (2) is sleeved on the outer side of the cable core (1), an outer insulating layer (4) is sleeved on the outer side of the inner insulating layer (2), and a cavity (3) is arranged between the inner insulating layer (2) and the outer insulating layer (4); a pressure relief pipe (6) is connected to the outer insulating layer (4), one end of the pressure relief pipe (6) is communicated with the cavity (3), the other end of the pressure relief pipe is connected with the liquid storage tank (5), and a first pressure relief valve (7) is installed at one end, close to the liquid storage tank (5), of the pressure relief pipe (6); a second pressure release valve (11) is arranged on the outer insulating layer (4), a water pipe (8) is also connected to the liquid storage tank (5), and the other end of the water pipe (8) is communicated with the cavity (3); one end of the water pipe (8) close to the liquid storage tank (5) is provided with a water pump (9) and a water valve (10);
the outer wall of the outer insulating layer (4) is further provided with a plurality of trigger mechanisms (12), each trigger mechanism (12) comprises a fixed box (14), one end, far away from the outer insulating layer (4), of each fixed box (14) is open, two rotating shafts (17) are arranged inside each fixed box (14), two ends of each rotating shaft (17) are rotatably connected with inner walls of two sides of each fixed box (14), each rotating shaft (17) is fixedly connected with a first cross rod (15), molten plastic (16) is arranged between the two first cross rods (15), two ends of each molten plastic (16) are respectively connected with end faces of the two first cross rods (15), one side, close to the outer insulating layer (4), of each rotating shaft (17) is further fixedly connected with an inclined rod (18), one side of each inclined rod (18) is connected with the inner wall of one end of each fixed box (14) through a first spring (19), a switch (23) is arranged above one of the two inclined rods (18), and each inclined rod (18) opens the switch (23) when rotating around the rotating shaft (17); second cross rods (21) are arranged above the two first cross rods (15), the second cross rods (21) are rotatably connected with the two sides of the fixed box (14) through pin shafts (22), one ends, far away from the two second cross rods (21), of the second cross rods are rotatably connected with the first cross rods (15) through vertical rods (20), sealing columns (24) are arranged between the two second cross rods (21), the bottoms of the sealing columns (24) are rotatably connected with the two second cross rods (21) respectively, the tops of the sealing columns (24) penetrate through the outer insulating layer (4), and the sealing columns (24) are slidably connected with the outer insulating layer (4);
the outer part of the outer insulating layer (4) is also provided with a bridge (13), the bridge (13) is formed by splicing a plurality of groups of first splicing blocks (25), second splicing blocks (38) and third splicing blocks (39), the first splicing blocks (25) are composed of a rectangular plate and two triangular plates arranged at two ends of the rectangular plate, two fixed shafts (29) are arranged at positions, close to the edge, of one side of each first splicing block (25), and a fixed shaft sleeve (30) is correspondingly arranged at the other side of each first splicing block; a triangular plate of the first splicing block (25) is connected with a positioning mechanism (26), the positioning mechanism (26) is fixedly connected with the first splicing block (25) through a connecting rod, a second positioning hole (27) is formed in the lower portion of the connecting rod, and a first positioning hole (28) is formed in the other triangular plate.
2. The fire-resistant cable for electric power according to claim 1, wherein: the positioning mechanism (26) comprises a positioning prism (31), positioning rod grooves (32) are formed in four circumferential surfaces of the positioning prism (31), a positioning rod (33) is arranged in each positioning rod groove (32), a positioning plate (34) is sleeved on the outer side of one end of the positioning prism (31), the positioning plate (34) is in sliding connection with the positioning prism (31), a fixing column is arranged on one side, away from the positioning rod (33), of the positioning plate (34), a sliding block (35) is arranged inside the positioning prism (31), the sliding block (35) is in sliding connection with the positioning prism (31), and the sliding block (35) penetrates through one end, provided with the positioning plate (34), of the positioning prism (31); one end of the positioning rod (33) far away from the positioning plate (34) is rotatably connected with the side wall of the positioning rod groove (32) through a pin shaft (22), one side of the positioning rod (33) close to the sliding block (35) is connected with a second spring (37), the other end of the second spring (37) is fixedly connected with the bottom of the positioning rod groove (32), a pin column (40) and a pull rope (36) are further arranged between the positioning rod (33) and the sliding block (35), two ends of the pin column (40) are fixedly connected with the side wall of the positioning rod groove (32), one end of the pull rope (36) is fixedly connected with the positioning rod (33), the other end of the pull rope is fixedly connected with the sliding block (35), and the middle part of the pull rope (36) is in contact with the pin column (40).
3. The fire-resistant cable for electric power according to claim 2, wherein: the first splicing block (25), the second splicing block (38) and the third splicing block (39) are identical in structure, the second splicing block (38) is installed between the first splicing block (25) and the third splicing block (39), and the third splicing block (39) and the first splicing block (25) are installed alternately.
4. The fire-resistant cable for electric power according to claim 3, wherein: the front end of the sealing column (24) is solid, and the middle part and the rear end are provided with through grooves along the vertical direction.
5. The fire-resistant cable for electric power according to claim 4, wherein: the trigger mechanisms (12) are vertically arranged below the outer insulating layer (4), and the interval between every two trigger mechanisms (12) is the same.
6. The fire-resistant cable for electric power according to claim 5, wherein: the cavity (3) in the outer insulating layer (4) is provided with partitions in the middle at intervals, and each section of cavity (3) is communicated with a liquid storage tank (5).
7. The fire-resistant cable for electric power according to claim 6, wherein: the switch (23) is connected with the water pump (9) and the water valve (10), and the water pumping amount of the water pump (9) in unit time is in direct proportion to the number of the switches (23) which are turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181704.XA CN113851265A (en) | 2021-10-11 | 2021-10-11 | Fire-resistant cable for electric power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111181704.XA CN113851265A (en) | 2021-10-11 | 2021-10-11 | Fire-resistant cable for electric power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113851265A true CN113851265A (en) | 2021-12-28 |
Family
ID=78977933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111181704.XA Pending CN113851265A (en) | 2021-10-11 | 2021-10-11 | Fire-resistant cable for electric power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113851265A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117393211A (en) * | 2023-10-20 | 2024-01-12 | 湖南麓源电力建设有限公司 | Anti-aging flexible cable |
-
2021
- 2021-10-11 CN CN202111181704.XA patent/CN113851265A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117393211A (en) * | 2023-10-20 | 2024-01-12 | 湖南麓源电力建设有限公司 | Anti-aging flexible cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113851265A (en) | Fire-resistant cable for electric power | |
| CN112482623B (en) | Fireproof structure based on building curtain wall | |
| CN110292728A (en) | A kind of motor vehicle storage unit of assembled fire-type | |
| CN110284685B (en) | Fireproof floor | |
| CN202850253U (en) | Cooling system based on steel structure and with fireproof performance optimized | |
| CN202105349U (en) | Fire extinguishing system on roof | |
| CN113972618A (en) | Be applied to improved generation fireproof cable trench of transformer substation | |
| CN111689340B (en) | External lifting device for high-rise fire escape | |
| CN214512395U (en) | Fire extinguishing device for water cannon on outer wall of high-rise building | |
| CN214763034U (en) | Fire control unit for construction | |
| CN210395650U (en) | Fire prevention heat preservation safety type steel construction | |
| CN103971612A (en) | Safety guide device | |
| CN211201633U (en) | Pre-buried formula fire prevention shutter | |
| CN117513529A (en) | Green for building fire prevention steel construction | |
| CN219355174U (en) | Multi-protocol fire alarm control system | |
| CN219280971U (en) | Fireproof building material plate convenient to install | |
| CN219690789U (en) | Building firewall | |
| CN220656218U (en) | Fire safety equipment utilizing unmanned aerial vehicle | |
| CN203882567U (en) | Safety guide device | |
| CN215888437U (en) | Anti-freezing outdoor fire hydrant | |
| CN212388825U (en) | A fire resistive construction for preventing furred ceiling burning | |
| CN216497189U (en) | Over-and-under type fire sprinkler system | |
| CN215054155U (en) | Fireproof high-temperature-resistant foamed polystyrene board for building external wall | |
| CN220877571U (en) | Detachable new energy vehicle water storage fire extinguishing enclosure | |
| CN114259660B (en) | Fire-fighting equipment storage and emergency refuge device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |