CN106099829A - A kind of wet environment cable connector fireproof protection box - Google Patents
A kind of wet environment cable connector fireproof protection box Download PDFInfo
- Publication number
- CN106099829A CN106099829A CN201610683970.5A CN201610683970A CN106099829A CN 106099829 A CN106099829 A CN 106099829A CN 201610683970 A CN201610683970 A CN 201610683970A CN 106099829 A CN106099829 A CN 106099829A
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- Prior art keywords
- protection box
- fireproof
- cable connector
- fire
- cable
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Classifications
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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
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
A kind of wet environment cable connector fireproof protection box, is provided with bottom it and does not fire dehumidifying material；Normally closed damp-proof and fireproof thermal component, and the Temperature Humidity Sensor communicated to connect with this damp-proof and fireproof thermal component it is provided with on this fireproof protection box；When the real time temperature in Temperature Humidity Sensor detects fireproof protection box is not above presetting warning value, controls damp-proof and fireproof thermal component and close；When the real time temperature in fireproof protection box preset more than first warning value cable connector overheated time, control damp-proof and fireproof thermal component and open；When the real time temperature in fireproof protection box presets warning value cable connector fire more than second, control damp-proof and fireproof thermal component and close.The present invention carries out effective moisture protection to cable connector；It is beneficial to cable connector dispel the heat in time, effectively reduces the blast caused because heat assembles or fire incident；When once breaking out of fire, can effectively intercept the tongues of fire, prevent the intensity of a fire from prolonging the cable that combustion is laid with tunnel to other.
Description
Technical field
The present invention relates to a kind of cable connector fireproof protection box, specifically refer to a kind of cable connector for wet environment and prevent
Fire protecting box, it is adaptable to the flameproof protection in the intensive places of power cable such as cable tunnel, cable duct, cable interlayer.
Background technology
Cable fire is multiple to be born at cable connector.Cable intermediate joint is ring the weakest in safe operation of power system
Joint, the most thermally-induced electric discontinuity of cable of cable connector, short circuit, blast even cause the case of major accident of common occurrence.Existing skill
In art, some cable tunnel inner high voltage cable connector is arranged in closed protecting box, and protecting box is internal fills fire prevention calking.Electricity
Cable joint heat radiation is unfavorable, is easily generated heat and assembles, and occurs energy to discharge nowhere once joint explosion accident, and protecting box can moment
Pop, thus initiation fire and fire and adjacent cable, be unfavorable for the operation safety of cable, cause the supply network large area in city
Paralysis.
Accordingly, it would be desirable to the power cable laid in electric power tunnel is proposed new fire protection requirement: a road cable has an accident
Can not cause adjacent cable prolongs combustion, i.e. can not affect other with the cable laid in tunnel.
Again due to be in the cable tunnel of underground, cable duct often have ventilation disadvantageous feature, environment is the moistest.For
Prevent cable connector from making moist, often use airtight protecting box protection cable connector.For cable tunnel in some engineer applied
The power cable of different layers installation with hanger, arranges PLASTIC LAMINATED in the place having cable connector, is isolated with upper and lower cable floor by joint.
But the PLASTIC LAMINATED of airtight protecting box and closing is all unfavorable for the heat radiation of cable connector, it is easily generated heat and assembles, thus cause
Explosion accident, is unfavorable for the operation safety of cable.
Summary of the invention
It is an object of the invention to provide a kind of wet environment cable connector fireproof protection box, cable connector can be carried out
Effective moisture protection；Be beneficial to the timely heat radiation of cable connector simultaneously, can effectively reduce the blast caused because heat assembles or
Fire incident；And once there is blast or fire, can effectively intercept the tongues of fire, preventing the intensity of a fire from prolonging combustion and laying with tunnel to other
Cable.
In order to achieve the above object, the present invention is achieved through the following technical solutions: a kind of wet environment cable connector is prevented
Fire protecting box, the inside of this fireproof protection box has a cavity, in order to accommodate cable connector；The bottom of this fireproof protection box is arranged
Have and do not fire dehumidifying material；It is provided with normally closed damp-proof and fireproof thermal component on this fireproof protection box, and dissipates with this damp-proof and fireproof
The Temperature Humidity Sensor of thermal part communication connection, according to the real time temperature in the fireproof protection box that Temperature Humidity Sensor detects,
Control damp-proof and fireproof thermal component to be turned on and off；Real time temperature in fireproof protection box being detected is not above presetting warning
During value, control damp-proof and fireproof thermal component and close；Real time temperature in fireproof protection box being detected presets warning more than first
When value cable connector is overheated, controls damp-proof and fireproof thermal component and open；When the real time temperature detected in fireproof protection box exceedes
Second when presetting warning value cable connector fire, controls damp-proof and fireproof thermal component and closes.
Described fireproof protection box is mutually spliced assembling by upper shell and lower house and is formed, it is simple to the installation of cable connector；
And described upper shell and lower house made by fire proofing material.
Described upper shell comprises the first framework and the first damp-proof and fireproof thermal component；This first damp-proof and fireproof thermal component
Comprise: the first drive mechanism communicated to connect with described Temperature Humidity Sensor, and be separately positioned on the end face of the first framework
And multiple first on each side rotates BAIYE；Each first rotates BAIYE respectively by one first power transmission shaft and described the
One drive mechanism connects；Real time temperature in the fireproof protection box that this first drive mechanism detects according to Temperature Humidity Sensor,
Control each the first rotation BAIYE by each first power transmission shaft to be turned on and off.
Described lower house comprises the second framework and the second damp-proof and fireproof thermal component；This second damp-proof and fireproof thermal component
Comprise: the second drive mechanism communicated to connect with described Temperature Humidity Sensor, and be separately positioned on each of the second framework
On side multiple second rotates BAIYE；Each second rotates BAIYE is driven with described second by a second driving shaft respectively
Mechanism connects；Real time temperature in the fireproof protection box that this second drive mechanism detects according to Temperature Humidity Sensor, by respectively
Individual second driving shaft controls each the second rotation BAIYE and is turned on and off.
Described Temperature Humidity Sensor is arranged on the first framework of upper shell, and is positioned at the end face central part of upper shell
Position.
The bottom part down of the second framework of described lower house is provided with pull-out type supporting plate, and this pull-out type supporting plate is provided with
Do not fire dehumidifying material.
The both sides of described fireproof protection box are respectively arranged with cable aperture, in order to connect respectively through the two ends with cable connector
The power cable connect；Described cable aperture is by the first cable aperture pillow being correspondingly arranged on upper shell, and is correspondingly arranged at down
The second cable aperture pillow splicing composition on housing；And the gap location between this cable aperture and power cable is filled with fire resistant flexible material
Material.
The two bottom sides of described upper shell is provided with outward extending first connecting plate, is used for connecting installation the first driving
Mechanism；The both sides, top of described lower house are provided with outward extending second connecting plate, are used for connecting installation the second driving machine
Structure；By connecting this first connecting plate and the second connecting plate to realize the splicing assembling of upper shell and lower house.
The first described drive mechanism and the second drive mechanism use electric driving mechanism, and it is fiery with outside cable respectively
Calamity monitoring system and cable connector monitoring system communication connection, send out according to cable fire monitoring system and cable connector monitoring system
The control signal gone out, controls each respectively and first rotates BAIYE and each second rotates being turned on and off of BAIYE.
Described Temperature Humidity Sensor and the communication connection of outside automatic fire alarm system, to this automatic fire alarm system
System transmission temperature signal is to judge whether to enable automatic fire extinguisher；Described Temperature Humidity Sensor and outside environmental monitoring system
System communication connection, to this environmental monitoring system transmission moisture signal to judge whether to need to change not fire dehumidifying material.
In sum, the wet environment cable connector fireproof protection box that the present invention provides, cable connector can be had
The moisture protection of effect；It is beneficial to the timely heat radiation of cable connector simultaneously, can effectively reduce the blast or fire caused because heat assembles
Calamity accident；And once there is blast or fire, can effectively intercept the tongues of fire, preventing the intensity of a fire from prolonging to fire and lay with tunnel to other
Cable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the wet environment cable connector fireproof protection box in the present invention；
Fig. 2 is the structural representation of the upper shell in the present invention；
Fig. 3 is the structural representation of the lower house in the present invention；
Fig. 4 is the top view of the lower house in the present invention；
Fig. 5 is the side view of the lower house in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As it is shown in figure 1, a kind of wet environment cable connector fireproof protection box provided for the present invention, this fireproof protection box
The inside of 3 has a cavity, in order to accommodate cable connector 2；The bottom of this fireproof protection box 3 is provided with does not fires dehumidifying material 8；Should
Be provided with normally closed damp-proof and fireproof thermal component on fireproof protection box 3, and with the communication connection of this damp-proof and fireproof thermal component
Temperature Humidity Sensor 7, according to the real time temperature in the fireproof protection box 3 that Temperature Humidity Sensor 7 detects, controls damp-proof and fireproof and dissipates
Thermal part is turned on and off；When the real time temperature detected in fireproof protection box 3 is not above presetting warning value, control protection against the tide
Fire prevention thermal component is closed, and is beneficial to cable connector 2 is carried out moisture protection；Real time temperature in fireproof protection box 3 being detected
Preset more than first warning value cable connector overheated time, control damp-proof and fireproof thermal component open, beneficially cable connector 2 dispels the heat,
To avoid breaking out of fire or blast because heat assembles；Real time temperature in fireproof protection box being detected is preset alert more than second
During ring value cable connector fire, control damp-proof and fireproof thermal component and close, make fireproof protection box 3 form a closing space, carry out
Fire damping, stops the tongues of fire to be scurried out, and prevents fire from prolonging and fires to adjacent cable, when meeting a road power cable breaking out of fire, does not prolongs
Fire the use requirement to other cables laid with tunnel, beneficially the condition of a disaster to control.
Described fireproof protection box 3 is mutually spliced assembling by the essentially identical upper shell 5 of structure and lower house 6 and is formed, and adopts
Assemble by the mode being readily disassembled connection, it is simple to the installation of cable connector 2 and maintenance；And described upper shell 5 and lower house 6
Being made by fire proofing material, fire proofing material and specification need to be adapted to the fire endurance of field of employment.
As in figure 2 it is shown, described upper shell 5 comprises the first framework 52 and the first damp-proof and fireproof thermal component；This first prevent
Tide fire prevention thermal component comprises: the first drive mechanism 56 communicated to connect with described Temperature Humidity Sensor 7, and is respectively provided with
On the end face and each side of the first framework 52 multiple first rotates BAIYE 53；Each first rotates BAIYE 53 passes through respectively
One first power transmission shaft 54 is connected with the first described drive mechanism 56；This first drive mechanism 56 is examined according to Temperature Humidity Sensor 7
Real time temperature in the fireproof protection box 3 measured, controls each the first rotation BAIYE 53 by each first power transmission shaft 54 and opens
Or close.
As shown in Fig. 3～Fig. 5, described lower house 6 comprises the second framework 62 and the second damp-proof and fireproof thermal component；This is years old
Two damp-proof and fireproof thermal components comprise: the second drive mechanism 66 communicated to connect with described Temperature Humidity Sensor 7, and respectively
Multiple second be arranged on each side of the second framework 62 rotates BAIYE 63；Each second rotates BAIYE 63 respectively by one
Second driving shaft 64 is connected with the second described drive mechanism 66；This second drive mechanism 66 detects according to Temperature Humidity Sensor 7
Real time temperature in the fireproof protection box 3 arrived, by each second driving shaft 64 control each second rotate BAIYE 63 open or
Close.
In the present embodiment, BAIYE 53 can be rotated according to first and the second rotation BAIYE 63 does not the most affect cable
The installation of joint 2 and the size of maintenance principles design blade.
As in figure 2 it is shown, described Temperature Humidity Sensor 7 uses explosion-proof temperature-moisture sensor, upper shell 5 can be arranged on
On first framework 52, and it is positioned at the end face centre of upper shell 5.Certainly in other preferred embodiments of the present invention, this temperature
Humidity sensor 7 can be arranged on the optional position on the first framework 52 or the second framework 62, as long as it can be accurately detected
Real time temperature in fireproof protection box 3 and real-time humidity.In other preferred embodiments of the present invention, it would however also be possible to employ single
Only temperature sensor and humidity sensor.Wherein, temperature sensor is arranged on the first framework 52 of upper shell 5, and is positioned at
The end face centre of upper shell 5, to ensure accurately to measure the real time temperature in fireproof protection box 3；Humidity sensor is then
The optional position on the first framework 52 or the second framework 62 can be arranged on.
As it is shown in figure 5, the bottom part down of the second framework 62 of described lower house 6 is provided with pull-out type supporting plate 68, such as Fig. 1
Shown in Fig. 4, this pull-out type supporting plate 68 is provided with and does not fires dehumidifying material 8.
The both sides of described fireproof protection box 3 are respectively arranged with cable aperture, in order to through the two ends with cable connector 2 respectively
The power cable 1 connected, and the gap location between this cable aperture and power cable 1 is filled with fire resistant flexible material 4.
As shown in Figures 2 and 3, described cable aperture by be correspondingly arranged on upper shell 5 first cable aperture pillow 55, and
The the second cable aperture pillow 65 splicing composition being correspondingly arranged on lower house 6.
As shown in Figures 2 and 3, the two bottom sides of described upper shell 5 is provided with outward extending first connecting plate 57, uses
In connecting, the first drive mechanism 56 is installed；The both sides, top of described lower house 6 are provided with outward extending second connecting plate 67,
For connecting installation the second drive mechanism 66；By being connected to realize upper shell with the second connecting plate 67 by this first connecting plate 57
5 assemble with the splicing of lower house 6.In the present embodiment, it is possible to use connector correspondence is through being arranged on the first connecting plate 57
First installing hole 51, and the second installing hole 61 being arranged on the second connecting plate 67, thus realize the first connecting plate 57 and
Fixing connection between two connecting plates 67.
The first described drive mechanism 56 and the second drive mechanism 66 use electric driving mechanism, its respectively with outside electricity
Cable fire hazard monitoring system and cable connector monitoring system communication connection, according to cable fire monitoring system and cable connector monitoring be
The control signal that system sends, controls each first rotation BAIYE 53 and the unlatching of each the second rotation BAIYE 63 or pass respectively
Close.
(fire personal in such as tunnel is automatic for described Temperature Humidity Sensor 7 and outside automatic fire alarm system
Warning system) communication connection, to this automatic fire alarm system transmission temperature signal to judge whether to enable automatic fire extinguisher；
Described Temperature Humidity Sensor 7 and the communication connection of outside environmental monitoring system, transmit moisture signal to this environmental monitoring system
To judge whether to need to change not fire dehumidifying material 8.
Wet environment cable connector fireproof protection box provided by the present invention, under normal circumstances, Temperature Humidity Sensor 7
Real time temperature in the fireproof protection box 3 detected is not above presetting warning value, now to the first drive mechanism 56 He
Second drive mechanism 66 sends control signal, controls respectively at each first rotation BAIYE 53 and each the second rotation BAIYE 63
In normally off, limit humid air and enter fireproof protection box 3, thus cable connector 2 is carried out moisture protection.When humiture passes
Real time temperature in the fireproof protection box 3 that sensor 7 detects preset more than first warning value cable connector overheated time, then to first
Drive mechanism 56 and the second drive mechanism 66 send control signal, control respectively each first rotate BAIYE 53 and each second
Rotating BAIYE 63 to open, beneficially heat radiation and the energy of cable connector 2 is released, to avoid heat to assemble in fireproof protection box 3
Thus cause blast or fire；When the real time temperature in the fireproof protection box 3 that Temperature Humidity Sensor 7 detects is preset more than second
During warning value cable connector fire, then send control signal to the first drive mechanism 56 and the second drive mechanism 66, control respectively
Each first rotation BAIYE 53 and each the second rotation BAIYE 63 are closed, and make fireproof protection box 3 form a closing space, carry out
Fire damping, stops the tongues of fire to be scurried out.When cable fire monitoring system and cable connector monitoring system monitoring are in fireproof protection box 3
When having fire to occur, or when cable fire monitoring system and cable connector monitoring system monitoring have fire to occur to adjacent cable
Time, then send control signal to the first drive mechanism 56 and the second drive mechanism 66, control each the first rotation BAIYE 53 respectively
And each second rotates BAIYE 63 and close, make fireproof protection box 3 form a closing space, carry out fire damping, stop the tongues of fire
Scurry out, prevent fire from prolonging and fire to adjacent cable, meet road power cable breaking out of fire or an explosion time, do not prolong combustion to other same tunnels
The use requirement of the cable that road lays, beneficially the condition of a disaster control；Meanwhile, by Temperature Humidity Sensor 7 to automatic fire alarm system
System transmission temperature signal, thus enable automatic fire extinguisher.Reality in the fireproof protection box 3 that Temperature Humidity Sensor 7 detects
Time humidity when exceeding default warning value, send prompting changing to environmental monitoring system and do not fire the signal of dehumidifying material 8.
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read foregoing, for the present invention's
Multiple amendment and replacement all will be apparent from.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a wet environment cable connector fireproof protection box, inside has a cavity, in order to accommodate cable connector (2)；Its
It is characterised by,
The bottom of this fireproof protection box (3) is provided with does not fires dehumidifying material (8)；
It is provided with normally closed damp-proof and fireproof thermal component on this fireproof protection box (3), and leads to this damp-proof and fireproof thermal component
The Temperature Humidity Sensor (7) that letter connects, according to the real time temperature in the fireproof protection box (3) that Temperature Humidity Sensor (7) detects,
Control damp-proof and fireproof thermal component to be turned on and off；
When the real time temperature detected in fireproof protection box (3) is not above presetting warning value, control damp-proof and fireproof radiating part
Part is closed；
When the real time temperature detected in fireproof protection box (3) preset more than first warning value cable connector overheated time, control anti-
Tide fire prevention thermal component is opened；
When the real time temperature detected in fireproof protection box (3) presets warning value cable connector fire more than second, control anti-
Tide fire prevention thermal component is closed.
2. wet environment cable connector fireproof protection box as claimed in claim 1, it is characterised in that described flameproof protection
Box (3) is assembled formed by upper shell (5) and lower house (6) mutually splicing, it is simple to the installation of cable connector (2)；
Described upper shell (5) and lower house (6) are made by fire proofing material.
3. wet environment cable connector fireproof protection box as claimed in claim 2, it is characterised in that described upper shell
(5) the first framework (52) and the first damp-proof and fireproof thermal component are comprised；
The first described damp-proof and fireproof thermal component comprises: the first driving communicated to connect with described Temperature Humidity Sensor (7)
Mechanism (56), and multiple first be separately positioned on the end face of the first framework (52) and each side rotate BAIYE (53)；
Each first rotates BAIYE (53) is connected with described the first drive mechanism (56) by one first power transmission shaft (54) respectively；
Real-time temperature in the fireproof protection box (3) that described the first drive mechanism (56) detects according to Temperature Humidity Sensor (7)
Degree, controls each first rotation BAIYE (53) by each first power transmission shaft (54) and is turned on and off.
4. wet environment cable connector fireproof protection box as claimed in claim 3, it is characterised in that described lower house
(6) the second framework (62) and the second damp-proof and fireproof thermal component are comprised；
The second described damp-proof and fireproof thermal component comprises: the second driving communicated to connect with described Temperature Humidity Sensor (7)
Mechanism (66), and multiple second rotations BAIYE (63) being separately positioned on each side of the second framework (62)；
Each second rotates BAIYE (63) is connected with described the second drive mechanism (66) by a second driving shaft (64) respectively；
Real-time temperature in the fireproof protection box (3) that described the second drive mechanism (66) detects according to Temperature Humidity Sensor (7)
Degree, controls each second rotation BAIYE (63) by each second driving shaft (64) and is turned on and off.
5. wet environment cable connector fireproof protection box as claimed in claim 4, it is characterised in that described humiture passes
Sensor (7) is arranged on first framework (52) of upper shell (5), and is positioned at the end face centre of upper shell (5).
6. wet environment cable connector fireproof protection box as claimed in claim 4, it is characterised in that described lower house
(6) bottom part down of the second framework (62) is provided with pull-out type supporting plate (68), this pull-out type supporting plate (68) is provided with and does not fire
Dehumidifying material (8).
7. wet environment cable connector fireproof protection box as claimed in claim 4, it is characterised in that described flameproof protection
The both sides of box (3) are respectively arranged with cable aperture, in order to through the power cable (1) being connected respectively with the two ends of cable connector (2)；
Described cable aperture is by the first cable aperture pillow (55) being correspondingly arranged on upper shell (5), and is correspondingly arranged at lower casing
The second cable aperture pillow (65) splicing composition on body (6)；
Gap location between described cable aperture and power cable (1) is filled with fire resistant flexible material (4).
8. wet environment cable connector fireproof protection box as claimed in claim 4, it is characterised in that described upper shell
(5) two bottom sides is provided with outward extending first connecting plate (57), is used for connecting installation the first drive mechanism (56)；
The both sides, top of described lower house (6) are provided with outward extending second connecting plate (67), are used for connecting installation second
Drive mechanism (66)；
Described the first connecting plate (57) is connected with the second connecting plate (67) spelling realizing upper shell (5) with lower house (6)
Connect assembling.
9. wet environment cable connector fireproof protection box as claimed in claim 4, it is characterised in that the first described driving
Mechanism (56) and the second drive mechanism (66) use electric driving mechanism, respectively with outside cable fire monitoring system and cable
Joint monitoring system communication connection, the control signal sent according to cable fire monitoring system and cable connector monitoring system, point
Do not control each and first rotate BAIYE (53) and each second rotates being turned on and off of BAIYE (63).
10. wet environment cable connector fireproof protection box as claimed in claim 1, it is characterised in that described humiture
Sensor (7) and the communication connection of outside automatic fire alarm system, to this automatic fire alarm system transmission temperature signal with
Judge whether to enable automatic fire extinguisher；
Described Temperature Humidity Sensor (7) and the communication connection of outside environmental monitoring system, wet to the transmission of this environmental monitoring system
Degree signal is to judge whether to need to change not fire dehumidifying material (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610683970.5A CN106099829A (en) | 2016-08-18 | 2016-08-18 | A kind of wet environment cable connector fireproof protection box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610683970.5A CN106099829A (en) | 2016-08-18 | 2016-08-18 | A kind of wet environment cable connector fireproof protection box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106099829A true CN106099829A (en) | 2016-11-09 |
Family
ID=58069733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610683970.5A Pending CN106099829A (en) | 2016-08-18 | 2016-08-18 | A kind of wet environment cable connector fireproof protection box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106099829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018714A (en) * | 2020-08-27 | 2020-12-01 | 山东鲁阳节能材料股份有限公司 | Cable joint protection box |
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| CN206060154U (en) * | 2016-08-18 | 2017-03-29 | 上海市政工程设计研究总院（集团）有限公司 | A kind of wet environment cable connector fireproof protection box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20090126989A1 (en) * | 2007-11-19 | 2009-05-21 | Jim Ford | Passive fire protection system for energized electric utility facilities and method of installation |
| CN102259585A (en) * | 2011-05-17 | 2011-11-30 | 上海奥威科技开发有限公司 | Ventilation and heat dissipation structure of electric vehicle power supply module cabin |
| CN202949188U (en) * | 2012-11-29 | 2013-05-22 | 中牟县供电公司 | Cable busbar connector insulation protective device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112018714A (en) * | 2020-08-27 | 2020-12-01 | 山东鲁阳节能材料股份有限公司 | Cable joint protection box |
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