CN206120987U - Cable tunnel and utility tunnel cable cabin fire protection system - Google Patents
Cable tunnel and utility tunnel cable cabin fire protection system Download PDFInfo
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- CN206120987U CN206120987U CN201621134448.3U CN201621134448U CN206120987U CN 206120987 U CN206120987 U CN 206120987U CN 201621134448 U CN201621134448 U CN 201621134448U CN 206120987 U CN206120987 U CN 206120987U
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- cable
- tunnel
- moving blade
- fire prevention
- cable connector
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Abstract
The utility model discloses a cable tunnel and utility tunnel cable cabin fire protection system, fire protection system contains: temperature sensor, its current temperature who detects cable joint or cable joint place accommodation space, output control signal, electric drive mechanism, its communication connection temperature sensor, the control signal who assigns according to temperature sensor exports rotation power, firebreak device, its mechanical connection electric drive mechanism drives switching, control cable joint or cable joint place accommodation space and external intercommunication or closed by electric drive mechanism. The utility model discloses a fire protection system can the real -time supervision cable or proruption situations such as cable joint overheated or the conflagration condition to close firebreak device when the proruption situation takes place, will take place to keep apart between conflagration or overheated cable or cable joint and near cable or the cable joint, prevent that the conflagration from firing to prolonging with the tunnel or with the cable that the cabin was laid.
Description
Technical field
This utility model is related to a kind of fire equipment, and in particular to a kind of cable tunnel and underground pipe gallery cable tank are anti-
Fiery system.
Background technology
Cable tunnel and underground pipe gallery cable tank are the main passways for transmitting electricity in city, are typically accommodated in tunnel and piping lane
Substantial amounts of power cable, once the condition of a fire is controlled in a fire retarding division or by fire-fighting system successfully to go out even if there is fire
Fire all still can cause heavy losses even large-area power-cuts, and be difficult to recover at short notice.
Cable fire is multiple to be born at cable connector.Cable intermediate joint is most weak ring in safe operation of power system
Section, the excessively thermally-induced electric discontinuity of cable of cable connector, short circuit, blast even cause the case of major accident of common occurrence.Certain synthesis
The scene of fire that the blast of 110kV cable connectors causes in piping lane cable tank is startling, although only several meters of the length that overdoes of fire,
But adjacent 110kV protective coverings of cable for laying burns, the supply network large area in city is caused to be paralysed.
Many area Utilities Electric Co.s propose new fire protection requirement to the power cable laid in cable tunnel or pipe gallery：One
There is problem and can not prolong combustion in road cable, it is impossible to affect other with tunnel or with cabin cabling.
For the power cable of different layers installation with hanger in some engineer applieds, fire prevention is set where having cable connector
Plate, by joint and upper and lower cable zone isolation.But the PLASTIC LAMINATED of closing is unfavorable for that cable connector radiates, it is also easy to produce heat and gathers
Collection, is unfavorable for the operation safety of cable.
Utility model content
This utility model provides a kind of cable tunnel and underground pipe gallery cable tank fire prevention system, is easy to cable connector to dissipate
The cable that heat, fire or explosion time guarantee are applied with tunnel or with cabin will not prolong combustion.
For achieving the above object, this utility model provides a kind of cable tunnel and underground pipe gallery cable tank fire prevention system
System, is characterized in, the fire prevention system is arranged at the connectivity part of cable connector or cable connector place accommodation space and the external world, fire prevention
System is included：
The Current Temperatures of temperature sensor, its detection cable connector or cable connector place accommodation space, output control refer to
Order；
Electric driving mechanism, its communication connection temperature sensor, assigns control signal according to temperature sensor, and output is rotated
Power；
The firebreak device of cable connector or cable connector place accommodation space and the connectivity part in the external world is arranged on, its machinery is even
Connect electric driving mechanism, by electric driving mechanism drive be opened and closed, control cable connector or cable connector place accommodation space with it is outer
Boundary connects or closes；
If it is higher than default temperature threshold that electric driving mechanism receives Current Temperatures, rotational power, control fire prevention are exported
Device is closed, and closes cable connector or cable connector place accommodation space.
Above-mentioned firebreak device includes moving blade group, and moving blade group is mechanically connected electricity by power transmission shaft respectively comprising some
The moving blade of dynamic drive mechanism；Moving blade parallel interval is arranged, and the spacing between the central axis of adjacent rotated blade is little
In the width of moving blade；
When firebreak device is closed, some moving blades are driven around central axis rotation, moving blade by electric driving mechanism
It is close to each other to partly overlapping；When firebreak device is opened, some moving blades are driven around central axis certainly by electric driving mechanism
Go to moving blade to be located remotely from each other.
Also comprising the fixed blade for being arranged at moving blade group both sides, fixed blade turns above-mentioned firebreak device to its nearest neighbours
Half of the distance of movable vane piece central axis less than moving blade width；When fixing the blade face of blade and going to overlapped certainly
The blade face of moving blade is parallel and overlaps.
Above-mentioned firebreak device includes Extensible framework, and moving blade and fixed blade activity are erected in Extensible framework,
The telescopic direction of Extensible framework is perpendicular to moving blade and the axial direction of fixed blade.
Above-mentioned Extensible framework includes semi-enclosed inner frame and outside framework, and inner frame and outside framework pass through chute vertically
Socket composition closed frame, inner frame and outside framework are mutually slided by chute, are adjusted axially the length of Extensible framework along chute
Degree.
It is additionally provided with the demarcation strip axially in parallel with moving blade in the middle part of above-mentioned Extensible framework, temperature sensor is arranged at point
On dividing plate.
Above-mentioned electric driving mechanism also communicates to connect fire hazard monitoring system and/or cable connector monitoring system, fire monitoring
System input communicates to connect temperature sensor, and fire hazard monitoring system and/or cable connector monitoring system are respectively according to default threshold
Value assigns instruction to electric driving mechanism control firebreak device opening and closing.
Above-mentioned electric driving mechanism is included：
Power transmission shaft drive circuit, its input communicate to connect temperature sensor, and/or fire hazard monitoring system, and/or cable
Joint monitoring system；
Power transmission shaft actuator, its inlet circuit connect power transmission shaft drive circuit, and the power of power transmission shaft actuator is defeated
Go out end and firebreak device is mechanically connected by power transmission shaft.
Above-mentioned fire prevention system be arranged at cable tunnel or underground pipe gallery cable tank in adjacent cable joint or cable
The connected region of joint place accommodation space.
If the horizontally disposed support of dried layer is provided with above-mentioned cable tunnel and underground pipe gallery cable tank, some half are constituted
Open accommodation space；Firebreak device is horizontally placed at each support；Or be vertically arranged between adjacent two layers support, will
Cable and/or cable connector place accommodation space are isolated from the outside.
Compared to the prior art, its advantage exists for this utility model cable tunnel and underground pipe gallery cable tank fire prevention system
In the burst shape such as overheated or fire condition of fire prevention system energy real-time monitoring cable disclosed in this utility model or cable connector
Condition, and firebreak device is closed when emergency situations occur, will there is fire or overheated cable or cable connector and neighbouring cable
Or isolate between cable connector, prevent the cable that fire is applied to same tunnel or with cabin from prolonging combustion；
Firebreak device disclosed in this utility model can be opened and closed according to environmental Kuznets Curves, ensureing phase between cable or cable connector
Ensure on the premise of mutually isolating that cable or cable connector can radiate in time, ensure the normal work of cable or cable connector；
Fire prevention architecture of the present utility model is simple, and easy for installation, adaptability is stronger, it is adaptable to popularization and application.
Description of the drawings
Fig. 1 is the structural representation of cable tunnel of the present utility model and underground pipe gallery cable tank；
N-N face sectional views of the Fig. 2 for Fig. 1；
Fig. 3 is the structural representation of cable bearer of the present utility model；
A-A face sectional views of the Fig. 4 for Fig. 3；
Fig. 5 is the structural representation of cable tunnel of the present utility model and underground pipe gallery cable tank fire prevention system；
B-B face sectional views of the Fig. 6 for Fig. 5；
C-C face sectional views of the Fig. 7 for Fig. 6；
M direction views of the Fig. 8 for Fig. 6；
Fig. 9 is being horizontally mounted and side for cable tunnel of the present utility model and underground pipe gallery cable tank fire prevention system
Scheme of installation；
D-D face sectional views of the Figure 10 for Fig. 9.
Specific embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is further illustrated.
If Fig. 1 is simultaneously with reference to shown in Fig. 2, it is the embodiment of a kind of cable tunnel and underground pipe gallery cable tank, the enforcement
Two parallel cable tunnels 101 are provided with example, level is provided with several cable beareves 105, cable in each cable tunnel 101
Support 105 is layered on top of each other setting, forms some semi-open accommodation spaces.In each semi-open accommodation space, cable bearer
It is provided with the cable connector 102 of 110KV or 220KV.
Adjacent cable joint or cable connector place accommodation space in the cable tunnel or underground pipe gallery cable tank
Connected region be provided with fire prevention system disclosed in the utility model 103.Fire prevention system 103 is included：Several firebreak devices
With a temperature sensor.
Specifically, firebreak device can be horizontally placed at each cable bearer 105；Or it is vertically arranged at adjacent two layers
Between cable bearer 105, or surround around cable and/or cable connector horizontally and vertically to arrange composition frame structure, will
Cable and/or cable connector place accommodation space and the external world（Comprising levels adjacent cable layer, left and right sides adjacent cable）Isolation,
When a fire, 102 place accommodation space closing of cable connector is prevented the tongues of fire from spreading to neighbouring cable by firebreak device.
Firebreak device can be horizontally disposed with and can also be vertically arranged, to realize-cable connector 102 is coated on which and is located to hold
In between being empty.In engineer applied, vertically arranged firebreak device is not typically used alone, and often coordinates the fire prevention being horizontally mounted to fill
Put use.
When being both needed to install firebreak device such as level and side in engineer applied, the firebreak device that side is installed can typically be fixed
On the firebreak device being horizontally mounted.
As shown in Fig. 2 installing between two adjacent cable bearer 105 of same layer per the firebreak device being only horizontally mounted.Tool
Body is arranged on 102 place layer of cable connector and top adjacent layer, in some cable bearer length ranges in 102 both sides of cable connector.
The installation number of firebreak device is according to live power cable flame retardant type with reference to its length data setting that overdoes（Pacify in Fig. 1 and Fig. 2
Dress quantity is only made to illustrate）；Every right angle setting firebreak device is fixed on upper and lower two firebreak devices being horizontally mounted.
Such as Fig. 3 is simultaneously combined shown in Fig. 4, is a kind of structural representation of cable bearer 301.This utility model is not limited to certain
The profile and size of cable bearer are planted, the cable bearer size and intensity of cable load-bearing demand is met and can typically be met fire prevention system
The use of system.The cable bearer 301 is provided with installing hole 302 and louvre 303, and the framework of the cable bearer 301 can be according to existing
Cable bearer customization.
Such as Fig. 5 is simultaneously combined shown in Fig. 6, Fig. 7, Fig. 8, is a kind of cable tunnel being horizontally mounted and underground pipe gallery cable
The embodiment of cabin fire prevention system, the firebreak device of the fire prevention system be arranged at cable connector or cable connector place accommodation space with
Extraneous connectivity part, is fixedly connected on cable bearer 506 by connecting bolt 511.The material of each ingredient of fire prevention system
Material selection and specification need to be adapted to the fire endurance of field of employment.
Wherein, in fire prevention system, each firebreak device is included：Extensible framework 501, electric driving mechanism 508, rotation
Blade group and fixed blade 507.
Extensible framework 501 includes semi-enclosed inner frame and outside framework, and inner frame and outside framework pass through chute vertically
Socket composition closed frame, inner frame and outside framework are mutually slided by chute, are adjusted axially the length of Extensible framework along chute
Degree.
Internal and external frame is using the embedded chute connection of bolt（Here mode with bolts is not limited, any one is readily removable
The connected mode unloaded is suitable for）.Internal and external frame end is all provided with grooved hole, slotted eye length and existing engineering construction alignment error scope
It is adapted.
In engineering construction installation often there is alignment error in the installing space of cable bearer, therefore fire prevention system need to be fine-tuning
Frame size is adapting to in-site installation requirement.Extensible framework 501 can be according to cable bearer construction and installation error transfer factor in engineering
Frame size, is equipped with chute in the middle part of the internal and external frame of its left and right sides end, by adjusting the length that internal and external frame chute is overlapped
The position of degree and bolt chute in internal and external frame, you can realize the fine setting to framework horizontal length.
501 side of Extensible framework is additionally provided with installing hole.Installing hole can be used to be installed vertically on cable connector layer place
The installation of the fire prevention system of frame side is fixed.
The frame of the fire prevention system for being provided with the outside of 501 framework of Extensible framework of vertically arranged fire prevention system and being horizontally mounted
Frame position of mounting hole is corresponding, can coordinate the installing hole of installation, with bolts according to requirement of engineering.
Moving blade group and fixed 507 activity of blade are erected in Extensible framework 501, Extensible framework 501 it is flexible
Direction is perpendicular to moving blade and the axial direction of fixed blade.
Moving blade group includes some moving blades for being mechanically connected electric driving mechanism 508 respectively by power transmission shaft 503
502.502 mutual parallel interval of moving blade is arranged, and being smaller than between the central axis of adjacent rotated blade 502 rotates
The width of blade 502.Here, rotary shaft of the power transmission shaft 503 of each connection of moving blade 502 for the moving blade 502, and edge
The central axis of moving blade 502 is arranged, and realizes each moving blade 502 with its center axis as center of rotation rotation.
Cable connector is overheated, fire or explosion time, and the linkage of moving blade 502 in firebreak device is closed, some moving blades
502 are driven around central axis rotation by power transmission shaft 503 by electric driving mechanism 508, and moving blade 502 is close to each other, and by
The width for being smaller than moving blade 502 between the central axis of adjacent rotated blade 502, rotates moving blade 502
Near partly overlapping to final adjacent rotated blade 502（In nearly horizontal state）, realize the closure of firebreak device.
Firebreak device is normally opened at ordinary times, some moving blades 502 by electric driving mechanism 508 by power transmission shaft 503 drive around
Central axis goes to moving blade certainly and is located remotely from each other, and when moving blade 502 is fully opened, is in nearly 90 with Extensible framework 501oOpen
Open state.502 opening of moving blade highly less than cable bearer height, does not reduce cable is arranged between cable bearer
Clear height.
, also comprising the fixed blade 507 for being arranged at moving blade group both sides, fixed blade 507 is to its nearest neighbours for firebreak device
Half of the distance of 502 central axis of moving blade less than 502 width of moving blade；Fix the blade face of blade 507 and go to certainly
The blade face of the moving blade 502 when overlapped is parallel and overlaps.The setting angle of fixed blade 507 need to be with moving blade 502
It is identical during closed mode, with realize it is good agree with, prevent the tongues of fire pass through.
Spaced demarcation strip 504 axially in parallel with moving blade 502, temperature are additionally provided with the middle part of Extensible framework 501
Sensor 505 is arranged on demarcation strip 504.Specifically, demarcation strip 504 is installed in the middle part of Extensible framework 501 and avoids rotating leaf
The correct position of 502 slewing area of piece, slewing area of the direction shown in arrow for moving blade 502, moving blade 502 in figure
Need between moving blade 502 during closure state it is good agree with, the tongues of fire can be prevented to pass through, install demarcation strip 504 position need to avoid
The slewing area of moving blade 502, it is to avoid moving blade 502 is stuck.
When cable bearer spacing is larger, when such as 1.5 meters, demarcation strip 504 can be with 501 integrated design of Extensible framework, will
501 decile of Extensible framework, with the mechanical strength of reinforced frame.
In the middle part of demarcation strip 504, temperature sensor 505 is set.Temperature sensor 505 detects cable connector or cable connector
The Current Temperatures of place accommodation space, output control signals to electric driving mechanism 508 according to temperature, temperature sensor 505
Control signal is directly accessed electric driving mechanism 508, passes through electric driving mechanism 508 during 505 overtemperature alarm of temperature sensor
It is dynamic to close moving blade 502；505 signal of temperature sensor also can access tunnel or the personal fire alarm system of piping lane（FAS systems
System）, as the Rule of judgment that automatic fire extinguisher starts.
Electric driving mechanism 508 includes power transmission shaft drive circuit and power transmission shaft actuator.Power transmission shaft drive circuit is input into
End communication connection temperature sensor 505, receives the drive signal that temperature sensor 505 is assigned.Power transmission shaft actuator input
Circuit connects power transmission shaft drive circuit, drives the clutch end of power transmission shaft actuator by transmission by power transmission shaft drive circuit
Shaft mechanical connects firebreak device.
Wherein, power transmission shaft actuator can adopt motor, can also adopt electromagnetic type, and this utility model does not limit electronic
The specific implementation of drive mechanism.
It is higher than default temperature threshold when temperature sensor 505 receives Current Temperatures, then drives electric driving mechanism 508 defeated
Go out rotational power, the control moving blade 502 for controlling firebreak device is coordinated with fixed blade 507 and closes, closing cable connector or
Cable connector place accommodation space.
Electric driving mechanism 508 is additionally provided with the communication interface with fire hazard monitoring system and cable connector monitoring system, fire
Monitoring system input communicates to connect temperature sensor, and fire hazard monitoring system and/or cable connector monitoring system are respectively according to pre-
If threshold value assigns instruction to electric driving mechanism 508, electric driving mechanism 508 receives drive signal linkage and closes moving blade
502 and calamity after reset moving blade 502 to opening.
As shown in figure 8, for the M direction views of Extensible framework 501, Extensible framework 501 is provided with slotted eye 509 and peace for side
Dress hole 510, for the fixation of firebreak device.
As shown in Figure 9, Figure 10, for be horizontally mounted and side install cable tunnel and underground pipe gallery cable tank fire prevention
The scheme of installation of system.In firebreak device, the inner frame at 501 two ends of Extensible framework is designed with fixing blade 507, fixed leaf
The setting angle of piece 507 is identical with during 502 closed mode of moving blade, can meet and fix blade in the range of internal and external frame fine setting
507 with neighbouring moving blade 502 be capable of achieving it is good agree with, prevent the tongues of fire from passing through.
Although content of the present utility model has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as to restriction of the present utility model.After those skilled in the art have read the above, for
Various modifications and substitutions of the present utility model all will be apparent.Therefore, protection domain of the present utility model should be by appended
Claim limiting.
Claims (10)
1. a kind of cable tunnel and underground pipe gallery cable tank fire prevention system, it is characterised in that the fire prevention system is arranged at electricity
Cable joint or cable connector place accommodation space and extraneous connectivity part, fire prevention system are included：
The Current Temperatures of temperature sensor, its detection cable connector or cable connector place accommodation space, output control signal；
Electric driving mechanism, its communication connection temperature sensor, assigns control signal according to temperature sensor, and output rotates dynamic
Power；
The firebreak device of cable connector or cable connector place accommodation space and the connectivity part in the external world is arranged on, which is mechanically connected electricity
Dynamic drive mechanism, is driven by electric driving mechanism and is opened and closed, and control cable connector or cable connector place accommodation space are with the external world even
Logical or closing；
If it is higher than default temperature threshold that electric driving mechanism receives Current Temperatures, rotational power is exported, control firebreak device
Close, close cable connector or cable connector place accommodation space.
2. cable tunnel as claimed in claim 1 and underground pipe gallery cable tank fire prevention system, it is characterised in that described anti-
Fiery device includes moving blade group, and moving blade group is mechanically connected turning for electric driving mechanism by power transmission shaft respectively comprising some
Movable vane piece；Moving blade parallel interval is arranged, the width for being smaller than moving blade between the central axis of adjacent rotated blade
Degree；
When firebreak device is closed, some moving blades are driven around central axis rotation by electric driving mechanism, and moving blade is mutual
Near to partly overlapping；When firebreak device is opened, some moving blades are driven by electric driving mechanism and are gone to around central axis certainly
Moving blade is located remotely from each other.
3. cable tunnel as claimed in claim 2 and underground pipe gallery cable tank fire prevention system, it is characterised in that described anti-
, also comprising the fixed blade for being arranged at moving blade group both sides, fixed blade is to its nearest neighbours moving blade central axis for fiery device
Distance less than moving blade width half；The blade face of fixed blade and the blade face of moving blade when going to overlapped
Parallel and overlap.
4. cable tunnel as claimed in claim 3 and underground pipe gallery cable tank fire prevention system, it is characterised in that described anti-
Fiery device includes Extensible framework, moving blade and fixed blade activity are erected in Extensible framework, and Extensible framework is stretched
Contracting direction is perpendicular to moving blade and the axial direction of fixed blade.
5. cable tunnel as claimed in claim 4 and underground pipe gallery cable tank fire prevention system, it is characterised in that it is described can
Telescopic frame includes semi-enclosed inner frame and outside framework, and inner frame and outside framework are socketed composition closing frame vertically by chute
Frame, inner frame and outside framework are mutually slided by chute, are adjusted axially the length of Extensible framework along chute.
6. cable tunnel as claimed in claim 4 and underground pipe gallery cable tank fire prevention system, it is characterised in that it is described can
The demarcation strip axially in parallel with moving blade is additionally provided with the middle part of telescopic frame, temperature sensor is arranged on demarcation strip.
7. cable tunnel as claimed in claim 1 and underground pipe gallery cable tank fire prevention system, it is characterised in that the electricity
Dynamic drive mechanism also communicates to connect fire hazard monitoring system and/or cable connector monitoring system, the communication of fire hazard monitoring system input
Connection temperature sensor, fire hazard monitoring system and/or cable connector monitoring system assign instruction to electricity according to predetermined threshold value respectively
Dynamic driving mechanisms control firebreak device opening and closing.
8. cable tunnel as claimed in claim 7 and underground pipe gallery cable tank fire prevention system, it is characterised in that the electricity
Dynamic drive mechanism is included：
Power transmission shaft drive circuit, its input communicate to connect temperature sensor, and/or fire hazard monitoring system, and/or cable connector
Monitoring system；
Power transmission shaft actuator, its inlet circuit connect power transmission shaft drive circuit, the clutch end of power transmission shaft actuator
Firebreak device is mechanically connected by power transmission shaft.
9. cable tunnel as claimed in claim 1 and underground pipe gallery cable tank fire prevention system, it is characterised in that described anti-
Fiery system be arranged at cable tunnel or underground pipe gallery cable tank in adjacent cable joint or accommodating sky that cable connector is located
Between connected region.
10. cable tunnel as described in claim 1 or 9 and underground pipe gallery cable tank fire prevention system, it is characterised in that institute
If the horizontally disposed support of dried layer is provided with stating cable tunnel and underground pipe gallery cable tank, some semi-open housing is constituted
Space；Firebreak device is horizontally placed at each support；Or be vertically arranged between adjacent two layers support, by cable and/or
Cable connector place accommodation space is isolated from the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621134448.3U CN206120987U (en) | 2016-10-18 | 2016-10-18 | Cable tunnel and utility tunnel cable cabin fire protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621134448.3U CN206120987U (en) | 2016-10-18 | 2016-10-18 | Cable tunnel and utility tunnel cable cabin fire protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206120987U true CN206120987U (en) | 2017-04-26 |
Family
ID=58573978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621134448.3U Active CN206120987U (en) | 2016-10-18 | 2016-10-18 | Cable tunnel and utility tunnel cable cabin fire protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206120987U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106362326A (en) * | 2016-10-18 | 2017-02-01 | 上海市政工程设计研究总院（集团）有限公司 | Fire prevention system for cable tunnel and underground comprehensive pipe gallery cable tank |
| CN109813372A (en) * | 2019-01-29 | 2019-05-28 | 国网河南省电力公司周口供电公司 | A kind of underground cable joint monitoring station |
-
2016
- 2016-10-18 CN CN201621134448.3U patent/CN206120987U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106362326A (en) * | 2016-10-18 | 2017-02-01 | 上海市政工程设计研究总院（集团）有限公司 | Fire prevention system for cable tunnel and underground comprehensive pipe gallery cable tank |
| CN109813372A (en) * | 2019-01-29 | 2019-05-28 | 国网河南省电力公司周口供电公司 | A kind of underground cable joint monitoring station |
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