CN111740374A - Novel cable joint explosion-proof box of fire extinguishing medium - Google Patents
Novel cable joint explosion-proof box of fire extinguishing medium Download PDFInfo
- Publication number
- CN111740374A CN111740374A CN202010655824.8A CN202010655824A CN111740374A CN 111740374 A CN111740374 A CN 111740374A CN 202010655824 A CN202010655824 A CN 202010655824A CN 111740374 A CN111740374 A CN 111740374A
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- China
- Prior art keywords
- fire extinguishing
- extinguishing medium
- shell
- cable joint
- proof box
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
-
- 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
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a novel cable joint explosion-proof box for a fire extinguishing medium, wherein a cooling fire extinguishing device capable of being automatically triggered is arranged in a shell of the explosion-proof box, and when the cable joint is over-high in temperature, on fire or deflagration, the cooling fire extinguishing device automatically sprays the fire extinguishing medium to carry out cooling fire extinguishing, so that danger and larger economic loss are prevented in time. The key points of the technical scheme are as follows: the fire extinguishing device comprises a shell, a cooling fire extinguishing device and a triggering device, wherein the middle part of the shell is bulged, a cavity is formed inside the shell, and first openings for allowing cables to penetrate through are reserved at two end parts of the shell; the temperature-reducing fire extinguishing device comprises a fire extinguishing medium, a container and an inert gas bottle, wherein the fire extinguishing medium is liquid at normal temperature and is quickly vaporized when being heated; the container is provided with a nozzle which can be opened and closed, high-pressure inert gas is stored in an inert gas bottle, the inert gas bottle is connected with the container through a pipeline, and a valve is arranged between the inert gas bottle and the container; the trigger device comprises a detection mechanism and a control mechanism, and the control mechanism is coupled with the detection mechanism and the valve at the same time.
Description
Technical Field
The invention relates to the field of related equipment of cables, in particular to a cable joint explosion-proof box of a novel fire extinguishing medium.
Background
The transmission of power and signals is realized through cables, and long-distance power transmission usually requires multiple cables to be stranded to achieve a sufficiently long transmission distance, but the joint of the cable is the weakest part in the whole cable line, and the conductors at the joint of the cable have a cross section and need to be exposed and connected by corresponding connectors, so that the cable joint may have the problems of short circuit, overlarge resistance, generation of eddy current and generation of heat and fire due to poor contact, dampness, external force damage and other factors, and even explosion occurs in severe cases.
Therefore, the problem to be solved in the field of related equipment of cables is solved urgently by how to avoid the problem that the temperature of the cable joint is too high to cause fire, and timely cool and extinguish the fire after temperature rise and fire.
Disclosure of Invention
The invention aims to provide a novel cable joint explosion-proof box for fire extinguishing medium, wherein a cooling fire extinguishing device capable of being automatically triggered is arranged in a shell of the explosion-proof box, and when the cable joint is over-high in temperature, on fire or deflagrated, the cooling fire extinguishing device automatically sprays the fire extinguishing medium to cool and extinguish fire, so that dangers and larger economic loss are prevented in time.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
the novel cable joint explosion-proof box for the fire extinguishing medium comprises a shell, a cooling fire extinguishing device and a triggering device, wherein the middle part of the shell is bulged, a cavity is formed inside the shell, and first openings for allowing cables to pass through are reserved at two end parts of the shell; the temperature-reducing fire extinguishing device comprises a fire extinguishing medium, a container for storing the fire extinguishing medium and an inert gas bottle for pressurizing the fire extinguishing medium, wherein the fire extinguishing medium is liquid at normal temperature, is heated and vaporized and exists in a gaseous state; the container is provided with a nozzle for spraying the fire extinguishing medium, the nozzle can be opened and closed, high-pressure inert gas is stored in the inert gas bottle, the inert gas bottle is connected with the container through a pipeline, and a valve is arranged between the inert gas bottle and the container; the trigger device comprises a detection mechanism and a control mechanism, the detection mechanism is arranged inside the shell, and the control mechanism is coupled with the detection mechanism and the valve at the same time.
Preferably, the fire extinguishing medium is perfluorohexanone.
Preferably, the container comprises at least two long metal tubes, one end of each metal tube is sealed, the other end of each metal tube is connected with the inert gas bottle through a pipeline, and the metal tubes are arranged around the axis of the first opening in a circumferential and equidistant mode; the spout is located on the lateral wall of tubular metal resonator, be equipped with sealing film on the spout, the spout of every tubular metal resonator all faces first open-ended axle center.
Preferably, the detection mechanism comprises a temperature sensor, the control mechanism is a relay, and the valve adopts an electromagnetic valve.
Preferably, the temperature measuring head of the temperature sensor is close to the middle of the cavity, and when the cable joint is positioned in the shell, the temperature measuring head is tightly attached to the joint of the cable.
Preferably, the detection mechanism further comprises a pressure sensor coupled to the relay.
Preferably, the shell is provided with at least one second opening, and the second opening is provided with a sealing cover.
Preferably, the shell is provided with a visual window for observing the condition in the chamber, and the visual window is made of heat-resistant glass.
Preferably, the housing is openable from the middle, and the housing includes an upper housing and a lower housing, which are detachably coupled.
Preferably, the inner side of the first opening is provided with a sealing ring gasket for waterproofing and fixing the cable.
Compared with the prior art, the novel cable joint explosion-proof box of the fire extinguishing medium adopting the technical scheme has the following beneficial effects:
the fire extinguishing medium of the cable joint explosion-proof box adopting the novel fire extinguishing medium is perfluorohexanone, is liquid at normal temperature and easy to store, can be rapidly vaporized to generate a large amount of gas to cover a fire point when being heated, is cooled and extinguished through heat absorption, and the perfluorohexanone gas is rapidly and naturally evaporated after the extinguishment is finished, so that no harmful substance is left.
The cable joint explosion-proof box adopting the novel fire extinguishing medium has three triggering modes, namely a temperature sensor, a pressure sensor and a perfluorohexanone self-heating expansion mode can be respectively used, so that perfluorohexanone is boosted to break through a sealing film on a nozzle and is sprayed out, the purpose of cooling and fire extinguishing is achieved, and the probability of spraying perfluorohexanone during the fire of a cable can be improved by arranging multiple triggering modes.
Thirdly, perfluorohexanone fills in a plurality of tubular metal resonator that set up around cable joint, and the spout is towards cable joint department for perfluorohexanone can directly spout to cable joint on, be favorable to rapid cooling, put out a fire.
And fourthly, the side wall of the shell is provided with a second opening, so that all parts inside the shell can be checked and maintained under the condition that the shell is not opened, and the perfluorohexanone gas in the chamber after fire extinguishment can be exhausted.
And the visual window on the shell is used for observing the condition of the cable joint, so that the shell is ensured to be opened for maintenance or replacement under the condition of no danger, and the visual window adopts high borosilicate glass and has the excellent characteristics of high temperature resistance, high mechanical property, water resistance, corrosion resistance and the like.
Sixthly, locate the sealing ring pad of first opening inner wall, sealing ring pad cover is on the outer wall of cable, not only can keep the cable stable, avoids the cable distortion of buckling, can also prevent that external moisture from getting into inside the casing, keeps cable joint's drying.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the cable joint explosion-proof box of the novel fire extinguishing medium.
Fig. 2 is a schematic view of the internal structure of the housing in this embodiment.
Fig. 3 and 4 are schematic structural diagrams of the temperature-reducing fire extinguishing apparatus in the embodiment.
Fig. 5 is a schematic structural diagram of the metal tube in this embodiment.
Fig. 6 is a schematic structural diagram of the triggering device in this embodiment.
Reference numerals: 1. a housing; 10. an upper housing; 11. a lower housing; 12. a first opening; 120. a sealing ring gasket; 13. a second opening; 14. a visible window; 15. a chamber; 2. a temperature-reducing fire-extinguishing device; 20. a fire extinguishing medium; 21. an inert gas bottle; 22. a container; 220. a metal tube; 221. a spout; 2210. sealing the film; 23. an electromagnetic valve; 3. a trigger device; 30. a pressure sensor; 31. a temperature sensor; 32. a relay; 4. and (3) a cable.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The novel cable joint explosion-proof box for the fire extinguishing medium shown in fig. 1 and 2 comprises a shell 1, a cooling fire extinguishing device 2 and a triggering device 3, wherein the middle of the shell 1 is bulged, a cavity 15 is formed inside the shell, the cooling fire extinguishing device 2 is arranged in the cavity 15, the shell 1 can be opened from the middle, the shell 1 comprises an upper shell 10 and a lower shell 11, and the upper shell 10 and the lower shell 11 are detachably connected.
A first opening 12 for the cable 4 to pass through is reserved at two end parts of the shell 1, a sealing ring gasket 120 for preventing water and fixing the cable 4 is arranged at the inner side of the first opening 12, the cable 4 passes through the sealing ring gasket 120 to enter the cavity 15, and a joint of the cable 4 is positioned in the middle of the cavity 15; two second openings 13 are arranged right above the upper shell 10, and sealing covers are arranged on the second openings 13; the side wall of the upper shell 10 is also provided with a visual window 14 for observing the fire extinguishing condition at the cable joint in the chamber 15, and the visual window 14 is made of high borosilicate glass with good heat resistance and high mechanical strength.
As shown in fig. 3 to 5, the temperature-reducing fire-extinguishing device 2 includes a fire-extinguishing medium 20, a container 22 for storing the fire-extinguishing medium 20, and an inert gas bottle 21 for pressurizing the fire-extinguishing medium 20, the fire-extinguishing medium 20 is perfluorohexanone, which is liquid at normal temperature, the perfluorohexanone is heated to be rapidly vaporized and exists in a gas state, the temperature is reduced and the fire is extinguished through heat absorption, and the perfluorohexanone gas is rapidly and naturally evaporated and escapes from the second opening 13 after the fire is extinguished.
The container 22 includes four elongated metal tubes 220, one end of each metal tube 220 is sealed, the other end of each metal tube 220 is connected with an exhaust port of the inert gas bottle 21 through a mutually communicated pipeline, high-pressure inert gas is stored in the inert gas bottle 21, and an electromagnetic valve 23 is arranged at the exhaust port of the inert gas bottle 21. The four metal tubes 220 are arranged circumferentially at equal intervals around the cable 4; five nozzles 221 are provided on each of the metal pipes 220, the five nozzles 221 are arranged in a straight line at equal intervals along the side wall of the metal pipe 220, the sealing film 2210 is provided on each of the nozzles 221, and the nozzles 221 of each of the metal pipes 220 are directed toward the cable wire 4.
As shown in fig. 6, the triggering device 3 includes a detection mechanism and a control mechanism, the detection mechanism includes a temperature sensor 31 and a pressure sensor 30, the control mechanism is a relay 32, the temperature sensor 31 and the pressure sensor 30 are coupled to the relay 32, and the relay 32 is coupled to the solenoid valve 23.
The temperature measuring head of the temperature sensor 31 is close to the middle part of the cavity 15, and when the cable joint is positioned in the shell 1, the temperature measuring head is tightly attached to the joint of the cable; the pressure sensor 30 is located in the middle of the chamber 15 near the cable connection.
The cable joint explosion-proof box of the novel fire extinguishing medium 20 can trigger perfluorohexanone to be sprayed out in three ways, wherein the three triggering ways are as follows:
1. when the temperature of the cable joint is too high or a fire occurs, the temperature sensor 31 tightly attached to the cable joint senses the temperature rise and transmits an electric signal to the relay 32, the relay 32 receives the signal and then controls the electromagnetic valve 23 to be opened, and at the moment, the high-pressure inert gas is flushed into the metal pipe 220 filled with the perfluorohexanone, so that the perfluorohexanone is boosted to break through the sealing film 2210 on the nozzle 221 and is sprayed to the cable joint.
2. When explosion occurs at the cable joint, a large impact force is generated, the surrounding air is compressed, and at the moment, the pressure sensor 30 senses pressure change and transmits a signal to the relay 32, and the later process is consistent with the mode 1.
3. When the temperature of the cable joint is too high or a fire occurs, the metal pipe 220 surrounding the cable joint is heated to raise the temperature, the perfluorohexanone in the metal pipe 220 is heated to be quickly vaporized, so that the internal pressure of the metal pipe 220 is increased, the sealing film 2210 on the nozzle 221 is broken along with the vaporization of the perfluorohexanone, and the perfluorohexanone is sprayed to the cable joint to achieve the purposes of extinguishing the fire and reducing the temperature.
The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a novel explosion-proof box of cable joint of fire extinguishing medium which characterized in that: comprises a shell (1), a temperature-reducing fire-extinguishing device (2) and a trigger device (3),
-the housing (1) is bulged in the middle and internally forms a chamber (15), and the two ends of the housing (1) are provided with first openings (12) for the electric cables (4) to pass through;
-the temperature reducing fire extinguishing device (2) comprises a fire extinguishing medium (20), a container (22) for storing the fire extinguishing medium (20) and an inert gas bottle (21) for pressurizing the fire extinguishing medium (20), the fire extinguishing medium (20) being liquid at normal temperature, the fire extinguishing medium (20) being vaporized by heat and existing in a gaseous state; the container (22) is provided with a nozzle (221) for spraying the fire extinguishing medium (20), the nozzle (221) can be opened and closed, high-pressure inert gas is stored in the inert gas bottle (21), the inert gas bottle (21) is connected with the container (22) through a pipeline, and a valve is arranged between the inert gas bottle (21) and the container (22);
-said triggering device (3) comprises detection means provided inside the casing (1) and control means simultaneously coupling the detection means and said valve.
2. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 1, characterized in that: the fire extinguishing medium (20) adopts perfluorohexanone.
3. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 1, characterized in that: the container (22) comprises at least two long metal tubes (220), one end of each metal tube (220) is sealed, the other end of each metal tube is connected with the inert gas bottle (21) through a pipeline, and the metal tubes (220) are arranged around the axis of the first opening (12) in a circumferential and equidistant mode; the nozzles (221) are arranged on the side wall of the metal pipe (220), the nozzles (221) are provided with sealing films (2210), and the nozzles (221) of each metal pipe (220) face to the axis of the first opening (12).
4. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 1, characterized in that: the detection mechanism comprises a temperature sensor (31), the control mechanism is a relay (32), and the valve adopts an electromagnetic valve (23).
5. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 4, characterized in that: the temperature measuring head of the temperature sensor (31) is close to the middle part of the cavity (15), and when the joint of the cable (4) is positioned in the shell (1), the temperature measuring head is tightly attached to the joint of the cable (4).
6. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 4, characterized in that: the detection mechanism further comprises a pressure sensor (30), and the pressure sensor (30) is coupled with a relay (32).
7. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 1, characterized in that: the side wall of the shell (1) is provided with at least one second opening (13), and the second opening (13) is provided with a sealing cover.
8. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 1, characterized in that: the shell (1) is provided with a visual window (14) for observing the condition in the cavity (15), and the visual window (14) is made of heat-resistant glass.
9. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 1, characterized in that: the shell (1) can be opened from the middle, the shell (1) comprises an upper shell (1) and a lower shell (1), and the upper shell (1) is detachably connected with the lower shell (1).
10. The novel fire extinguishing medium cable joint explosion-proof box as claimed in claim 1, characterized in that: and a sealing ring gasket (120) for preventing water and fixing the cable (4) is arranged on the inner side of the first opening (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655824.8A CN111740374B (en) | 2020-07-09 | 2020-07-09 | Novel cable joint explosion-proof box of fire extinguishing medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655824.8A CN111740374B (en) | 2020-07-09 | 2020-07-09 | Novel cable joint explosion-proof box of fire extinguishing medium |
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| Publication Number | Publication Date |
|---|---|
| CN111740374A true CN111740374A (en) | 2020-10-02 |
| CN111740374B CN111740374B (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010655824.8A Active CN111740374B (en) | 2020-07-09 | 2020-07-09 | Novel cable joint explosion-proof box of fire extinguishing medium |
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| Country | Link |
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| CN (1) | CN111740374B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825248A (en) * | 2022-05-09 | 2022-07-29 | 西安交通大学 | High-voltage cable accessory protection device with water cooling and explosion-proof functions |
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2020
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| US4085286A (en) * | 1974-09-27 | 1978-04-18 | Raychem Corporation | Heat-recoverable sealing article with self-contained heating means and method of sealing a splice therewith |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825248A (en) * | 2022-05-09 | 2022-07-29 | 西安交通大学 | High-voltage cable accessory protection device with water cooling and explosion-proof functions |
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| Publication number | Publication date |
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| CN111740374B (en) | 2022-03-08 |
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