CN106310564A - Flame spread preventing method for cable tunnel fires - Google Patents
Flame spread preventing method for cable tunnel fires Download PDFInfo
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- CN106310564A CN106310564A CN201610907942.7A CN201610907942A CN106310564A CN 106310564 A CN106310564 A CN 106310564A CN 201610907942 A CN201610907942 A CN 201610907942A CN 106310564 A CN106310564 A CN 106310564A
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- Prior art keywords
- cable
- fire
- cable connector
- moving blade
- venetian blind
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
Abstract
The invention discloses a flame spread preventing method for cable tunnel fires. The flame spread preventing method includes the steps that a shutter-type fireproofing device is arranged at the communicating position of a cable joint or the containing space of the cable joint and the outside; a temperature sensor is used for monitoring the temperature of the cable joint or the containing space of the cable joint in real time; and when the fires happen or the temperature is too high, the temperature sensor outputs control information to control the shutter-type fireproofing device to be closed through an electrically driven mechanism, and accordingly the cable joint or a cable can be isolated from the outside. By means of the flame spread preventing method, the shutter-type fireproofing device is arranged at the communicating position of the cable joint or the containing space of the cable joint and the outside, the emergency situation of excessive heating of the cable or cable joint or the fire emergency situation are monitored in real time, the fireproofing device is closed when the emergency situations occur, the cable or cable joint with fires or excessive heating can be isolated from cables or cable joints nearby, and thus the fires can be prevented from spreading towards the cables laid on the same tunnel or the same cabin.
Description
Technical field
The present invention relates to a kind of fireproofing technique, be specifically related to the anti-of a kind of cable tunnel fire and prolong burning method.
Background technology
Cable tunnel is the passway for transmitting electricity that city is main, and in tunnel, the substantial amounts of power cable of general receiving, once occurs fire
Even if the condition of a fire is controlled all or to cause heavy losses very in a fire retarding division or by fire-fighting system successful fire extinguishment by calamity
To large-area power-cuts, and it is difficult to recover at short notice.
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.Certain cable
The scene of fire that in tunnel, the blast of 110kV cable connector causes is startling, although overdo length relatively in flame retardant cable fire
Short, but adjacent 110kV protective coverings of cable laid burns the most, causes the supply network large area in city to be paralysed.
Many area Utilities Electric Co.s power cable to laying in electric power tunnel proposes new fire protection requirement: a road cable occurs
Problem can not prolong combustion, it is impossible to affects other with tunnel or with cabin and applies cable.
For the power cable of different layers installation with hanger in some engineer applied, fire prevention is set in the place having cable connector
Plate, by joint and upper and lower cable zone isolation.But the PLASTIC LAMINATED closed is unfavorable for that cable connector dispels the heat, it is easily generated heat and gathers
Collection, is unfavorable for the operation safety of cable.
Summary of the invention
The present invention provides the anti-of cable tunnel fire to prolong burning method, it is simple to cable connector dispels the heat, and ensures fire or explosion time
Combustion will not be prolonged with tunnel or with the cable that cabin is deposited.
For achieving the above object, the present invention provides the anti-of a kind of cable tunnel fire to prolong burning method, is characterized in, this prevents prolonging
Burning method comprises:
Cable connector or cable connector place accommodation space arrange venetian blind type firebreak device with extraneous connectivity part；
Cable connector or the temperature of cable connector place accommodation space are monitored in temperature sensor in real time, when breaking out of fire or temperature mistake
Height, temperature sensor output control information is controlled venetian blind type firebreak device Guan Bi by electric driving mechanism, by cable connector or
Cable is isolated from the outside.
When the temperature of cable connector or cable connector place accommodation space is in normal condition, and venetian blind type firebreak device is protected
Hold normally opened.
Above-mentioned venetian blind type firebreak device comprises moving blade group, and moving blade group comprises some respectively by power transmission shaft machine
Tool connects the moving blade of electric driving mechanism；Moving blade parallel interval is arranged, between the central axis of adjacent rotated blade
The width being smaller than moving blade；
During firebreak device Guan Bi, some moving blades are driven around central axis rotation by electric driving mechanism, and moving blade is mutual
Near to partly overlapping.
Above-mentioned venetian blind type firebreak device comprises the fixing blade being arranged at moving blade group both sides, and fixing blade is to from it
The distance of moving blade central axis is less than the half of moving blade width recently；
Moving blade is driven around central axis in time going to partly overlap by electric driving mechanism, the blade face of fixing blade and rotation
The blade face of blade is parallel and overlapping.
Above-mentioned venetian blind type firebreak device comprises moving blade group, and moving blade group comprises some respectively by power transmission shaft machine
Tool connects the moving blade of electric driving mechanism；Moving blade parallel interval is arranged, between the central axis of adjacent rotated blade
The width being smaller than moving blade；
When firebreak device is opened, some moving blades are driven around central axis mutual from going to moving blade by electric driving mechanism
Away from.
The angle that when above-mentioned firebreak device is opened, when moving blade and fire prevention dress Guan Bi, moving blade rotates is 60 to 90 degree.
Above-mentioned electric driving mechanism also receives fire hazard monitoring system and/or the control signal of cable connector monitoring system, when
Fire hazard monitoring system and/or cable connector monitoring system assign the control signal closing venetian blind type firebreak device, motorized motions
Mechanism controls venetian blind type firebreak device closes.
Above-mentioned fire hazard monitoring system receives the temperature signal of temperature sensor, when temperature is higher than what fire hazard monitoring system was preset
Threshold value, then fire hazard monitoring system judges that the control of venetian blind type firebreak device is closed in cable or cable connector breaking out of fire, output
Signal.
Above-mentioned venetian blind type firebreak device is arranged at cable connector or cable connector place accommodation space and extraneous connection
During place, the flexible size adjusting venetian blind type firebreak device, make venetian blind type firebreak device that cable connector or cable are completely covered
Joint place accommodation space and extraneous connectivity part.
The cavity of the venetian blind type firebreak device composition hollow being horizontally disposed with and being vertically arranged, is formed in cavity and arranges cable
The accommodation space of joint.
Compared to the prior art the anti-of cable tunnel of the present invention fire prolong burning method, has an advantage in that, the present invention is at cable
Joint or cable connector place accommodation space arrange venetian blind type firebreak device with extraneous connectivity part, in real time monitoring cable or electricity
Emergency situations such as the overheated or fire condition of cable joint, and close firebreak device when emergency situations occurs, by breaking out of fire or
Isolating between overheated cable or cable connector and neighbouring cable or cable connector, the cable preventing same tunnel or cabin from applying prolongs combustion；
The firebreak device arranged in the present invention can be mutually isolated ensureing between cable or cable connector according to environmental Kuznets Curves opening and closing
On the premise of ensure that cable or cable connector can dispel the heat in time, ensure the normal work of cable or cable connector.
Accompanying drawing explanation
Fig. 1 is a kind of cable tunnel and the structural representation of underground pipe gallery cable tank；
Fig. 2 is the N-N face sectional view of Fig. 1；
Fig. 3 is a kind of cable bearer or the structural representation of cable connector support；
Fig. 4 is the A-A face sectional view of Fig. 3；
Fig. 5 is a kind of cable tunnel and the structural representation of underground pipe gallery cable tank fire prevention system；
Fig. 6 is the B-B face sectional view of Fig. 5；
Fig. 7 is the C-C face sectional view of Fig. 6；
Fig. 8 is the M direction view of Fig. 6；
Fig. 9 is being horizontally mounted and side scheme of installation of a kind of cable tunnel and underground pipe gallery cable tank fire prevention system；
Figure 10 is the D-D face sectional view of Fig. 9；
Figure 11 is the anti-method flow diagram prolonging burning method of cable tunnel of the present invention fire.
Detailed description of the invention
Below in conjunction with accompanying drawing, further illustrate the specific embodiment of the present invention.
Such as Fig. 1 and combine shown in Fig. 2, anti-by cable tunnel of the present invention fire prolongs a kind of cable tunnel that burning method is suitable for
Road and the embodiment of underground pipe gallery cable tank, be provided with two parallel cable tunneies 101, each cable tunnel in this embodiment
In road 101, to be provided with several cable beareves or cable connector support 105, cable bearer or cable connector support 105 mutual for level
Stacking is arranged, and forms some semi-open accommodation spaces.In each semi-open accommodation space, cable bearer or cable connector prop up
Frame 105 is provided with the cable connector 102 of 110KV or 220KV.
Adjacent cable joint in cable tunnel or underground pipe gallery cable tank or cable connector place accommodation space
Connected region be provided with fire prevention system 103 disclosed in this invention.Fire prevention system 103 comprises: several firebreak devices,
Temperature sensor.
Concrete, firebreak device can be horizontally placed at each cable bearer or cable connector support 105；Or vertically
Be arranged between adjacent two layers cable bearer or cable connector support 105, or around around cable and/or cable connector with water
Gentle it is vertically arranged composition frame structure, cable and/or cable connector place accommodation space (are comprised levels adjacent with the external world
Cable floor, left and right sides adjacent cable) isolation, when a fire, cable connector 102 place accommodation space is sealed by firebreak device
Close, prevent the tongues of fire from spreading to neighbouring cable.
Firebreak device can be horizontally disposed with and can also be vertically arranged, to realize cable connector 102 is coated on its place appearance
In between being empty.In engineer applied, vertically arranged firebreak device is not used alone, and often coordinates the fire prevention dress being horizontally mounted
Put use.
In engineer applied as level and side be both needed to install firebreak device time, side install firebreak device typically can fix
On the firebreak device being horizontally mounted.
As in figure 2 it is shown, every firebreak device being horizontally mounted props up at adjacent two cable bearer of same layer or cable connector
Install between frame 105.Specifically being arranged on cable connector 102 place layer and top adjacent layer, the some cables in cable connector 102 both sides prop up
In frame length range.The installation quantity of firebreak device combines its length data that overdoes according to on-the-spot power cable flame retardant type and arranges
(Fig. 1 and Fig. 2 installing quantity only make to illustrate)；Every right angle setting firebreak device is fixed on upper and lower two fire prevention being horizontally mounted
On device.
Such as Fig. 3 and combine shown in Fig. 4, for a kind of cable being suitable in above-mentioned cable tunnel and underground pipe gallery cable tank
Support or the structural representation of cable connector support 301.The present invention is not limited to profile and the size of certain cable bearer, meets
The cable bearer size of cable load-bearing demand and intensity also typically can meet the use of fire prevention system.This cable bearer or cable connect
Head bracket 301 is provided with installing hole 302 and louvre 303, and the framework of this cable bearer or cable connector support 301 can be according to existing
Cable bearer customization.
Such as Fig. 5 and combine shown in Fig. 6, Fig. 7, Fig. 8, prolong that burning method is suitable for by cable tunnel of the present invention fire anti-one
Plant the cable tunnel and the embodiment of underground pipe gallery cable tank fire prevention system, the firebreak device of this fire prevention system being horizontally mounted
It is arranged at cable connector or cable connector place accommodation space and extraneous connectivity part, is fixedly connected on by connecting bolt 511
On cable bearer 506.The material selection of each ingredient of fire prevention system and specification need to be adapted to the fire endurance of field of employment.
Wherein, in fire prevention system, each firebreak device comprises: Extensible framework 501, electric driving mechanism 508, rotation
Vane group and fixing blade 507.
Extensible framework 501 comprises semi-enclosed inner frame and outside framework, inner frame and outside framework by 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 uses bolt to embed chute connection, and (the most not limiting mode with bolts, any one is readily removable
The connected mode unloaded is the most applicable).Internal and external frame end is equipped with slotted eye, slotted eye length and existing engineering construction alignment error scope
Adapt.
In engineering construction installation often there is alignment error in the installing space of cable bearer, and therefore fire prevention system needs fine-tuning
Frame size is to adapt 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 both side ends around, by the length that regulation internal and external frame chute is overlapping
Degree and bolt position of chute in internal and external frame, can realize the fine setting to framework horizontal length.
Extensible framework 501 side is additionally provided with installing hole.Installing hole can be used for being installed vertically on cable connector layer place and props up
The installation of the fire prevention system of frame side is fixed.
The frame of the fire prevention system being provided with and being horizontally mounted outside Extensible framework 501 framework of vertically arranged fire prevention system
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 fixing blade 507 adjustable shelf are located in Extensible framework 501, stretching of Extensible framework 501
Direction is perpendicular to the axial of moving blade and fixing blade.
Moving blade group comprises some moving blades being mechanically connected electric driving mechanism 508 respectively by power transmission shaft 503
502.The mutual parallel interval of moving blade 502 is arranged, and being smaller than between the central axis of adjacent rotated blade 502 rotates
The width of blade 502.Here, the rotary shaft that power transmission shaft 503 is this moving blade 502 that each moving blade 502 connects, and edge
The central axis of moving blade 502 is arranged, it is achieved each moving blade 502 is with its center axis for center of rotation rotation.
Cable connector is overheated, fire or explosion time, turns moving blade 502 linkage in firebreak device and closes, some rotation leaves
Sheet 502 is 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
Due to the width being smaller than moving blade 502 between the central axis of adjacent rotated blade 502, make moving blade 502 turns
Move and partly overlap (in the state of nearly level) near to final adjacent rotated blade 502, it is achieved the Guan Bi of firebreak device.
Firebreak device is the most normally opened, some moving blades 502 by electric driving mechanism 508 by power transmission shaft 503 drive around
Central axis certainly goes to moving blade and is located remotely from each other, when moving blade 502 fully opens, with Extensible framework 501 in nearly 90oOpen
Open state.Moving blade 502 opening height is less than cable bearer height, does not reduce and can arrange cable between cable bearer
Clear height.
Firebreak device also comprises the fixing blade 507 being arranged at moving blade group both sides, fixing blade 507 to its nearest neighbours
The distance of moving blade 502 central axis is less than the half of moving blade 502 width；The blade face of fixing blade 507 goes to oneself
The blade face of the moving blade 502 time overlapped is parallel and overlapping.The setting angle of fixing blade 507 need to be with moving blade 502
During closed mode identical, to realize good agreeing with, stop the tongues of fire pass.
Spaced demarcation strip 504 axially in parallel with moving blade 502, temperature it is additionally provided with in the middle part of Extensible framework 501
Sensor 505 is arranged on demarcation strip 504.Concrete, demarcation strip 504 is installed in the middle part of Extensible framework 501 to be avoided rotating leaf
The correct position of sheet 502 slewing area, in figure, direction shown in arrow is the slewing area of moving blade 502, moving blade 502
Needing good agreeing with during closure state between moving blade 502, the tongues of fire can be stoped to pass, the position installing demarcation strip 504 need to be avoided
The slewing area of moving blade 502, it is to avoid moving blade 502 is stuck.
When cable bearer spacing is relatively big, during such as 1.5 meters, demarcation strip 504 can be with Extensible framework 501 integrated design, will
Extensible framework 501 decile, with the mechanical strength of reinforced frame.
Temperature sensor 505 is set in the middle part of demarcation strip 504.Temperature sensor 505 detects cable connector or cable connector
The Current Temperatures of place accommodation space, outputs control signals to electric driving mechanism 508 according to temperature, temperature sensor 505
Control signal is directly accessed electric driving mechanism 508, by electric driving mechanism 508 during temperature sensor 505 overtemperature alarm
Dynamic closedown moving blade 502；Temperature sensor 505 signal also can be accessed by tunnel or piping lane is used by oneself fire alarm system (FAS system
System), the Rule of judgment started as automatic fire extinguisher.
Electric driving mechanism 508 comprises power transmission shaft drive circuit and power transmission shaft actuator.Power transmission shaft drive circuit inputs
End communication connection temperature sensor 505, receives the driving signal that temperature sensor 505 is assigned.Power transmission shaft actuator input
Circuit connects power transmission shaft drive circuit, power transmission shaft drive circuit drive the clutch end of power transmission shaft actuator to pass through transmission
Shaft mechanical connects firebreak device.
Wherein, power transmission shaft actuator can use driving motor, also can use electromagnetic type, and the present invention does not limit motorized motions
The specific implementation of mechanism.
It is higher than, when temperature sensor 505 receives Current Temperatures, the temperature threshold preset, then drives electric driving mechanism 508 defeated
Go out rotational power, control the control moving blade 502 of firebreak device and coordinate closedown with fixing blade 507, closing cable connector or
Cable connector place accommodation space.
Electric driving mechanism 508 is additionally provided with and fire hazard monitoring system and the communication interface of cable connector monitoring system, fire
Monitoring system input communication connection temperature sensor, fire hazard monitoring system and/or cable connector monitoring system are respectively according to pre-
If threshold value is assigned instruction and is driven signal to link close moving blade to electric driving mechanism 508, electric driving mechanism 508 acceptance
502 and calamity after reset moving blade 502 to opening.
As shown in Figure 8, for the M direction view of Extensible framework 501, Extensible framework 501 is provided with slotted eye 509 and peace for side
Dress hole 510, fixing for firebreak device.
As shown in Figure 9, Figure 10, it is horizontally mounted and side by what cable tunnel of the present invention fire anti-prolonged that burning method is suitable for
The cable tunnel installed and the scheme of installation of underground pipe gallery cable tank fire prevention system.In firebreak device, Extensible framework
The inner frame at 501 two ends is designed with fixing blade 507, when the setting angle of fixing blade 507 is with moving blade 502 closed mode
Identical, can meet and fix blade 507 in the range of internal and external frame fine setting and all can realize good contract adjacent to moving blade 502
Close, stop the tongues of fire to pass.
As shown in figure 11, the invention discloses the anti-of a kind of cable tunnel fire and prolong burning method, this prevents that prolonging burning method comprises
Following steps:
S1, cable connector or cable connector place accommodation space arrange venetian blind type firebreak device with extraneous connectivity part.
It is arranged at cable connector or cable connector place accommodation space and extraneous connectivity part at venetian blind type firebreak device
Time, by Extensible framework, the flexible size adjusting venetian blind type firebreak device, make venetian blind type firebreak device that electricity is completely covered
Cable joint or cable connector place accommodation space and extraneous connectivity part, it is ensured that when venetian blind type firebreak device close can
Calamity of lighting a fire and overheated cable connector or cable and the neighbouring complete next door of other power equipments.
Further, venetian blind type firebreak device is set and comprises in the following manner:
1), during venetian blind type firebreak device is arranged at the horizontal stand at cable connector or cable connector place, it is positioned at upper and lower two-layer electricity
Between cable joint or cable, isolation is positioned at cable connector or the cable of levels.
2) venetian blind type firebreak device is vertically arranged at the edge of horizontal stand at cable connector or cable connector place,
Connect and be positioned at the horizontal stand above and below cable connector or cable.Here venetian blind type firebreak device be positioned at cable connector
Or the horizontal stand above and below cable surrounds placement cable connector or the accommodation space of cable.
3) venetian blind type firebreak device is horizontally disposed with and is vertically arranged, and horizontally disposed venetian blind type firebreak device is arranged at
In the horizontal stand at cable connector or cable connector place, this is horizontally disposed with and is vertically arranged venetian blind type firebreak device and support
The cavity of composition hollow, forms the accommodation space arranging cable connector or cable, jumps to step in cavity.
Cable connector or the temperature of cable connector place accommodation space are monitored in S2, temperature sensor in real time, and output temperature is believed
Number, and judge that the whether breaking out of fire of its cable connector detected or cable or temperature are too high, and output control signals to electronic
Drive mechanism.
The most then jump to S3；If otherwise jumping to S2.2.
S2.2, when the temperature of cable connector or cable connector place accommodation space is in normal condition, and venetian blind type is prevented fires
Device maintains a normally open, and jumps to S2.
S3, detecting that breaking out of fire or temperature are too high when temperature sensor, temperature sensor output control information is to the most electronic
Drive mechanism, electric driving mechanism controls venetian blind type firebreak device Guan Bi, and some moving blades are driven by electric driving mechanism
Around central axis rotation, moving blade is close to each other to partly overlapping.
Moving blade is driven around central axis in time going to partly overlap by electric driving mechanism, the blade face of fixing blade with
The blade face of moving blade is parallel and overlapping.
Moving blade coordinates with fixing blade, it is achieved cable connector or cable are isolated from the outside.
The angle that when firebreak device is opened, when moving blade and fire prevention dress Guan Bi, moving blade rotates is 60 to 90 degree.
If S4 electric driving mechanism does not receives the control signal opening venetian blind type firebreak device, the most persistently keep BAIYE
Window firebreak device closes.
Open the control signal of venetian blind type firebreak device when electric driving mechanism receives, then control venetian blind type fire prevention
Device is opened, and some moving blades are certainly gone to moving blade by electric driving mechanism drive around central axis and are located remotely from each other, and redirect
To S2.
Further, electric driving mechanism also receives fire hazard monitoring system and/or the control letter of cable connector monitoring system
Number, monitor system when fire hazard monitoring system and/or cable connector and assign the control signal of closedown venetian blind type firebreak device, electronic
Driving mechanisms control venetian blind type firebreak device closes.
Wherein, temperature sensor output temperature signal to fire hazard monitoring system, fire hazard monitoring system receives temperature sensor
Temperature signal, fire hazard monitoring system judges the whether breaking out of fire of its cable connector detected or cable, when temperature is higher than fire
The threshold value of calamity monitoring systemic presupposition, then fire hazard monitoring system judges that shutter is closed in cable or cable connector breaking out of fire, output
The control signal of formula firebreak device.
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. the anti-of a cable tunnel fire prolongs burning method, it is characterised in that this prevents that prolonging burning method comprises:
Cable connector or cable connector place accommodation space arrange venetian blind type firebreak device with extraneous connectivity part；
Cable connector or the temperature of cable connector place accommodation space are monitored in temperature sensor in real time, when breaking out of fire or temperature mistake
Height, temperature sensor output control information is controlled venetian blind type firebreak device Guan Bi by electric driving mechanism, by cable connector or
Cable is isolated from the outside.
2. the anti-of cable tunnel as claimed in claim 1 fire prolongs burning method, it is characterised in that when cable connector or cable connect
The temperature of head place accommodation space is in normal condition, and venetian blind type firebreak device maintains a normally open.
3. the anti-of cable tunnel as claimed in claim 1 fire prolongs burning method, it is characterised in that described venetian blind type fire prevention dress
Putting and comprise moving blade group, moving blade group comprises some rotation leaves being mechanically connected electric driving mechanism respectively by power transmission shaft
Sheet；Moving blade parallel interval is arranged, the width being smaller than moving blade between the central axis of adjacent rotated blade；
During firebreak device Guan Bi, some moving blades are driven around central axis rotation by electric driving mechanism, and moving blade is mutual
Near to partly overlapping.
4. the anti-of cable tunnel as claimed in claim 3 fire prolongs burning method, it is characterised in that described venetian blind type fire prevention dress
Put and comprise the fixing blade being arranged at moving blade group both sides, the distance of fixing blade to its nearest neighbours moving blade central axis
Half less than moving blade width；
Moving blade is driven around central axis in time going to partly overlap by electric driving mechanism, the blade face of fixing blade and rotation
The blade face of blade is parallel and overlapping.
5. the anti-of cable tunnel as claimed in claim 2 fire prolongs burning method, it is characterised in that described venetian blind type fire prevention dress
Putting and comprise moving blade group, moving blade group comprises some rotation leaves being mechanically connected electric driving mechanism respectively by power transmission shaft
Sheet；Moving blade parallel interval is arranged, the width being smaller than moving blade between the central axis of adjacent rotated blade；
When firebreak device is opened, some moving blades are driven around central axis mutual from going to moving blade by electric driving mechanism
Away from.
6. the anti-of cable tunnel fire as described in claim 3 or 4 or 5 prolongs burning method, it is characterised in that described firebreak device
The angle that when opening, when moving blade and fire prevention dress Guan Bi, moving blade rotates is 60 to 90 degree.
7. the anti-of cable tunnel as claimed in claim 1 fire prolongs burning method, it is characterised in that described electric driving mechanism is also
Receive fire hazard monitoring system and/or the control signal of cable connector monitoring system, when fire hazard monitoring system and/or cable connector are supervised
Examining system assigns the control signal closing venetian blind type firebreak device, and electric driving mechanism controls venetian blind type firebreak device and closes
Close.
8. the anti-of cable tunnel as claimed in claim 7 fire prolongs burning method, it is characterised in that described fire hazard monitoring system connects
The temperature signal of shrinkage temperature sensor, when the threshold value that temperature is preset higher than fire hazard monitoring system, then fire hazard monitoring system judges electricity
Cable or cable connector breaking out of fire, the control signal of venetian blind type firebreak device is closed in output.
9. the anti-of cable tunnel as claimed in claim 1 fire prolongs burning method, it is characterised in that described venetian blind type fire prevention dress
When installing the connectivity part being placed in cable connector or cable connector place accommodation space and the external world, flexible adjustment venetian blind type fire prevention fills
The size put, makes venetian blind type firebreak device that cable connector or cable connector place accommodation space and extraneous connection are completely covered
Place.
10. the anti-of cable tunnel as claimed in claim 1 fire prolongs burning method, it is characterised in that is horizontally disposed with and vertically sets
The cavity of the venetian blind type firebreak device composition hollow put, forms the accommodation space arranging cable connector or cable in cavity.
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| CN201610907942.7A CN106310564A (en) | 2016-10-18 | 2016-10-18 | Flame spread preventing method for cable tunnel fires |
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| CN201610907942.7A CN106310564A (en) | 2016-10-18 | 2016-10-18 | Flame spread preventing method for cable tunnel fires |
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