CN108612203A - A kind of hole fireproof blocking method - Google Patents
A kind of hole fireproof blocking method Download PDFInfo
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- CN108612203A CN108612203A CN201810479987.8A CN201810479987A CN108612203A CN 108612203 A CN108612203 A CN 108612203A CN 201810479987 A CN201810479987 A CN 201810479987A CN 108612203 A CN108612203 A CN 108612203A
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- Prior art keywords
- hole
- fire prevention
- cable
- fireproof
- fire
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
- E04B1/948—Fire-proof sealings or joints
Abstract
The invention discloses a kind of hole fireproof blocking methods, are related to a kind of fire-protection construction method, mainly include the following steps that：Several jack holes for wearing cable are opened up out in fire prevention board group according to the size of cable；Fireproof seal gum is uniformly coated to each inner wall of hole and the fire prevention each lateral wall in board group side respectively, fire prevention board group is bonded in hole；Material is blocked up in package fire prevention on the outside of cable, and cable is blocked up material together with the fire prevention and is inserted into jack hole, fireproof seal gum is used in combination to block the gap at the jack hole both ends；In the both sides brushing fireproof coating of the fire prevention board group, thickness of the fireproof coating in fire prevention board group is at least 0.7mm；The both sides for board group of preventing fires attach U.S. line paper, and the opening at hole both ends is completely covered by by U.S. line paper.The present invention provides economical and practical, flameproof effect is good, be suitable for promote, applied widely, practicability is extremely strong, and can effective guarantee people's security of the lives and property a kind of hole fireproof blocking method.
Description
Technical field
The present invention relates to a kind of fire-protection construction methods, specifically, it is related to a kind of hole fireproof blocking method.
Background technology
Currently, for cable fire-proof, it is distinctly claimed in State Grid engineering cable design specification GB50217-2007：Electricity
In cable structures cable be led at the hole of electrical cabinet, disk or control flow, the osseotomy site of platform, cable penetration partition wall, floor, work
Fireproof blocking should all be implemented by making cable pore in well.Currently, the domestic method generally used is to add cement will be electric with common square brick
The hole that cable passes through is shut.Although this method meets the needs of wall body structure intensity, but it does not have the effect of fireproof blocking；
Once fire behavior occurs, the heat of flame can make the part craze and transfiguration in wall hole for closure, and flue gas and heat can be worn
Wall is crossed, flame equally understands skewered to the other side of hole, the intensity of a fire is caused further to spread.
Invention content
The object of the present invention is to provide a kind of hole fireproof blocking method, comprehensive utilization fire prevention board group, fire prevention are blocked up material and are prevented
The validity of holes blocking is effectively ensured in fiery coating, and building fire protection performance is greatly improved.
The present invention above-mentioned technical purpose technical scheme is that：A kind of hole fireproof blocking side
Method includes the following steps：
S1, several jack holes for wearing cable are opened up out in fire prevention board group according to the size of cable；
S2, respectively to each inner wall of hole and fire prevention each lateral wall in board group side uniformly coat fireproof seal gum, by board group of preventing fires
Whole embedded hole so that the fire prevention each lateral wall in board group side is Nian Jie with each inner wall of hole respectively, and fireproof seal gum is used in combination to block
Gap between board group of preventing fires and hole；
S3, material is blocked up in package fire prevention on the outside of cable, and cable is blocked up material together with the fire prevention and is inserted into jack hole, is used in combination fire prevention close
Sealing blocks the gap at the jack hole both ends；
S4, it is described fire prevention board group both sides brushing fireproof coating, fireproof coating fire prevention board group on thickness be at least
0.7mm；
S5, board group of preventing fires both sides attach U.S. line paper, and the opening at hole both ends is completely covered by by U.S. line paper.
By using above-mentioned technical proposal, fire prevention board group is adhesively fixed on entirely through fireproof seal gum in hole, is prevented fires
Board group itself can effectively completely cut off the intensity of a fire, play effective fireproofing function, and fireproof seal gum can effectively block fire prevention board group
With the gap between hole inner wall, fire spreading is reduced to the possibility of the wall other side.Meanwhile by being wrapped up on the outside of cable
Material is blocked up in fire prevention, and stifled material of preventing fires effectively can not only avoid flame from being spread by jack hole, further increase flameproof effect, it can also be right
Cable plays good protective action, reduces the possibility that cable is damaged in construction or follow-up use.In addition, being painted on fire prevention
The fireproof coating of board group both sides can further increase the fire protecting performance of fire prevention board group, and hole envelope can be greatly improved in U.S. line paper
Stifled aesthetics.
The present invention is further arranged to：The fire prevention board group includes fireproof coated board, and the fireproof coated board is in hole
Parallel interval is equipped with two groups.
By using above-mentioned technical proposal, fireproof coated board uses rock cotton board as organism material, and its tow sides covers
Lid fireproof coating has good fire retardant performance；Two groups of fireproof coated boards are set by interval, can not only ensure hole
Block sealing effect, moreover it is possible to the fire protecting performance of building be greatly improved.
The present invention is further arranged to：The fire prevention board group further includes rock cotton board, and the rock cotton board is located at two groups of fire prevention and applies
Between laminate, and two fireproof coated boards are adhesively fixed with rock cotton board adjacent side.
It can be further increased by using above-mentioned technical proposal by adding rock cotton board between two fireproof coated boards
The fire protecting performance of building.
The present invention is further arranged to：After the completion of step S1, before step S2 starts, each inner wall of hole, fire prevention are first cleaned
Each surface in board group side and each inner wall of jack hole.
It is each by cleaning each inner wall of hole, each surface in fire prevention board group side and jack hole by using above-mentioned technical proposal
Inner wall ensures the dry tack free after each cleaning, dustless, oil-free, can effectively ensure that steady Nian Jie with hole inner wall of fire prevention board group
It is qualitative.
The present invention is further arranged to：It includes fire protection pipe group that material is blocked up in the fire prevention, and cable wears the fire protection pipe group, and institute
Fire protection pipe group is stated with jack hole in interference fit.
By using above-mentioned technical proposal, jack hole and fire protection pipe group are arranged to the structure type of interference fit, it can
Further increase fire protecting performance of the building at hole；Meanwhile fire protection pipe group can also play the role of cable effective protection, reduce
The impaired risk of cable.
The present invention is further arranged to：The gap of the fire protection pipe group and cable is packed with mineral wool；The fire prevention blocks up material also
Including the fire-proof belt being wound on cable.
By using above-mentioned technical proposal, fire-proof belt can improve the regularity of cable, facilitate holes blocking operation
It carries out；Meanwhile the gap of cable and fire protection pipe group is blocked by mineral wool, the leakproofness of plugging structure can be further increased, and
Further increase fire protecting performance of the building at hole.
The present invention is further arranged to：The fire protection pipe group includes rock wool pipe and the high temperature alloy that is sheathed on the outside of rock wool pipe
Pipe, the rock wool pipe is with high temperature alloy pipes in interference fit.
By using above-mentioned technical proposal, rock wool pipe is wrapped in the outside of cable, can play good fireproofing function, drop
The risk that low cable is burned out；Meanwhile by being arranged high temperature alloy pipes on the outside of rock wool pipe, high temperature alloy pipes have good resistance to
Hot, it holding structure can stablize at high temperature, so as to play a very good protection to rock wool pipe and cable etc., drop
The risk of low cable damage.
The present invention is further arranged to：Rock wool pipe side offers hole for injecting glue, and the hole for injecting glue is through rock wool pipe
Tube wall；In step s3, it after cable wears the rock wool pipe, first passes through the injected rubber hose and is injected between rock wool pipe and cable
Fireproof seal gum, then it is arranged high temperature alloy pipes on the rock wool pipe.
By using above-mentioned technical proposal, fireproof seal gum, energy are injected to the gap of rock wool pipe and cable by hole for injecting glue
The possibility that cable is wriggled in fire protection pipe group is enough reduced, to not only improve the stability of cable, moreover it is possible to further carry
Fire protecting performance of the high building at hole.
The present invention is further arranged to：After the completion of step S2, before step S3 starts, in the both sides of hole fixed frame simultaneously
If cable bracket, the high settings such as two cable brackets are in.
By using above-mentioned technical proposal, two groups of cable brackets can play cable effective supporting role, ensure reality
While existing penetrating cable through wall setting, the convenience of holes blocking is greatly improved.
The present invention is further arranged to：In step s 4, the fireproof coating partial mulching cable is located at fire prevention board group two
The part of side, and the fireproof coating is at least 150mm in the take up an official post length of side overlay area of cable, thickness is at least 1mm.
It can not only by brushing certain fireproof coating respectively in the both sides of cable by using above-mentioned technical proposal
Further decrease the gap of cable and jack hole, moreover it is possible to greatly improve the fire protecting performance of cable.
In conclusion the invention has the advantages that：
1, while blocking hole using fireproof coated board, rock cotton board and fireproof seal gum, by cable and jack hole it
Between setting fire protection pipe group, mineral wool and fireproof seal gum, cooperation is painted on the fireproof coating of fire prevention board group both sides, worn meeting cable
On the basis of wall demand, fire protecting performance of the building at hole is greatly improved, ensures the safety of people's lives and properties；
2, by setting rock wool pipe and high temperature alloy pipes in cable outer sheath, the risk of cable damage can be substantially reduced, is prolonged significantly
The service life of long cable contributes to the frequency for reducing cable refitting, greatly reduces economic cost；
3, the mode blocked compared to traditional masonry, the plugging structure dismounting involved by hole fireproof blocking method is convenient, convenient
The refitting or increase-volume for realizing cable, are greatly improved the convenience of cable daily maintenance；
4, the hole fireproof blocking method is suitable for the closure operation of large hole, applied widely, practicability is extremely strong.
Description of the drawings
Fig. 1 is that the present embodiment is mainly used for integrally-built axonometric schematic diagram after the completion of embodiment holes blocking；
Fig. 2 is that the present embodiment is mainly used for embodying the structural schematic diagram of fire prevention board group；
Fig. 3 is that the present embodiment is mainly used for embodying the structural schematic diagram of fire protection pipe group.
Reference numeral：1, fire prevention board group；101, fireproof coated board；102, rock cotton board；2, jack hole；3, fire protection pipe group；31、
High temperature alloy pipes；32, rock wool pipe；321, hole for injecting glue；4, cable；5, cable bracket；6, U.S. line paper；7, fire-proof belt；8, mineral wool.
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.
Referring to attached drawing 1, a kind of hole fireproof blocking method is mainly used for the hole left after closure cable 4 is through walls, including
Following steps：
S1, several jack holes 2 for wearing cable 4 are opened up out in fire prevention board group 1 according to the size of cable 4.
S2, respectively to each inner wall of hole and fire prevention each lateral wall in 1 side of board group uniformly coat fireproof seal gum, will prevent fires
The whole embedded hole of board group 1 so that the fire prevention each lateral wall in 1 side of board group is Nian Jie with each inner wall of hole respectively, and fire proof seal is used in combination
Glue blocks the gap between fire prevention board group 1 and hole.
Fireproof seal gum is the liquid fire proofing material for having fire proof seal function；In the present embodiment, the fireproof seal gum
Optional happiness is sharp to obtain fireproof seal gum produced, model CP606 or FS-ONE；Fireproof seal gum is ensureing board group of preventing fires
Between 1 and hole while leakproofness, moreover it is possible to building fire protection performance be effectively ensured.
Referring to attached drawing 2, fire prevention board group 1 includes fireproof coated board 101, and fireproof coated board 101 is used as base using rock cotton board 102
Body material, and its tow sides covers fireproof coating, has good fire retardant performance.The fireproof coated board 101 is along hole
Through direction parallel interval be equipped with two groups, two fireproof coated boards 101 are located near hole both-side opening, and pass through fire prevention
Fluid sealant is adhesively fixed with hole inner wall.Meanwhile board group 1 of preventing fires further includes being arranged in parallel between two groups of fireproof coated boards 101
Rock cotton board 102；Rock cotton board 102 is also known as rock wool heat-preservation decorative panel, is processed through high-temperature fusion using basalt as main raw material(s)
Made of inorganic fiberboard, have the characteristics that light weight, thermal coefficient it is small, heat absorption, it is non-ignitable；The side of rock cotton board 102 and hole
Each inner wall is adhesively fixed, and the both sides of 102 thickness direction of rock cotton board are applied by CP606 fireproof seal gums and adjacent two fire prevention respectively
Laminate 101 is adhesively fixed.
Existing China Patent Publication No. is that the application for a patent for invention of CN102529207A discloses a kind of fireproof coated board
101.As it can be seen that above-mentioned fireproof coated board 101 belongs to the ripe prior art；It is few superfluous herein accordingly, with respect to its specific composition
It states.
Meanwhile before starting step S2, it is preferred that using each inner wall of hairbrush cooperation detergent cleaning hole, fire-proof plate
1 each outer surface of group and 2 each inner wall of jack hole, it is ensured that dry tack free, dustless, oil-free after cleaning help to ensure board group 1 of preventing fires
The stability Nian Jie with hole inner wall ensures the leakproofness between fire prevention board group 1 and hole inner wall.
S3, material is blocked up in 4 outside package fire prevention of cable, cable 4 is blocked up into material together with the fire prevention and is inserted into jack hole 2, and
The gap at 2 both ends of the jack hole is blocked with fireproof seal gum.
Referring to attached drawing 3, it includes fire-proof belt 7 to prevent fires and block up material, and fire-proof belt 7 tightly winds cable 4 for wearing jack hole 2
Part；3M fire-proof belts 7 can be selected in the fire-proof belt 7.Meanwhile it further includes fire protection pipe group 3, fire protection pipe group 3 that material is blocked up in the fire prevention
Including rock wool pipe 32, hole for injecting glue 321 is offered on rock wool pipe 32, hole for injecting glue 321 runs through the tube wall of rock wool pipe 32；In step S3
In, after fire-proof belt 7 is wound on cable 4, cable 4 is worn into rock wool pipe 32.
To further increase fire protecting performance, 32 both ends of rock wool pipe are nearby packed with mineral wool 8, mineral wool 8 have it is non-ignitable, be stale-proof,
The performances such as light are good heat-insulation and heat-preservation, sound-absorbing material；After the completion of the filling of mineral wool 8, staff can use plank with holes
Temporarily block the opening at 32 both ends of rock wool pipe, and by hole for injecting glue 321 into rock wool pipe 32 middle injection fireproof seal gum so that it is anti-
Fiery fluid sealant is fully filled with the gap of rock wool pipe 32 and cable 4, further increases fire protecting performance.
In addition, fire protection pipe group 3 further includes high temperature alloy pipes 31；It, will be high after injecting fireproof seal gum into rock wool pipe 32
Temperature alloy pipe 31 is sheathed on the outside of rock wool pipe 32；It should be noted that high temperature alloy pipes 31 are preferably interference fitted with rock wool pipe 32, protect
Demonstrate,prove the leakproofness between rock wool pipe 32 and high temperature alloy pipes 31.Also, after cable 4 wears fire protection pipe group 3, by cable 4 together with
Fire protection pipe group 3 is whole to wear jack hole 2；At this point, being preferably again interference fitted between high temperature alloy pipes 31 and jack hole 2.
High temperature alloy pipes 31 can bear certain pressure under 600-1200 DEG C of high temperature and with anti-oxidant or anticorrosive
Ability.According to matrix element, high temperature alloy pipes 31 can be divided into iron-base superalloy pipe, nickel base superalloy pipe and cobalt-based high-temperature
Compo pipe；In the present embodiment, which is preferably made of Inconel718 alloys, and Inconel718 alloys are
Precipitation hardenable nichrome containing niobium, molybdenum has high intensity, good toughness at 700 DEG C and in high and low temperature environment
All have corrosion resistance.
Preferably, after the completion of step S2, before step S3 starts, erection line is bolted simultaneously in the both sides of hole
Cable bracket 5, and two groups of cable brackets 5 in etc. high settings.In construction, cable bracket 5 can play cable 4 effectively support and make
With, ensure realize 4 setting through walls of cable while, the convenience of holes blocking is greatly improved.
S4, it is described fire prevention board group 1 both sides brushing fireproof coating, fireproof coating fire prevention board group 1 on thickness at least
For 0.7mm.
The optional happiness of above-mentioned fireproof coating is sharp to obtain fireproof coating produced, model CP670, and density is about
1.41kg/cm3, construction temperature is -5 DEG C to 40 DEG C, and applicable working temperature is -40 DEG C to 100 DEG C after construction.Meanwhile the fire prevention
Coating preferably covers cable 4 and stretches out the part at jack hole 2；Also, the length of fireproof coating either side overlay area on cable 4
Degree is at least 150mm, and thickness is at least 1mm.
S5, board group 1 of preventing fires both sides attach U.S. line paper 6, and the opening at hole both ends is completely covered by by U.S. line paper 6.
U.S. line paper 6 is a kind of high-tech decoration, spraying paper, and color separation effect boundary line is clear, bright and clear, and has both camber line U.S.
Building aesthetic sense can be greatly improved in art effect.
The operation principle of the present embodiment：
It comprehensively utilizes fireproof coated board 101, rock cotton board 102 and fireproof seal gum and blocks hole；Meanwhile by fire protection pipe group 3
On open up jack hole 2, convenient for wearing cable 4.Before cable 4 wears jack hole 2, the outside of cable 4 be arranged rock wool pipe 32 and
High temperature alloy pipes 31, fire-proof belt, mineral wool and the fireproof seal gum being equipped with before fire protection pipe group and cable, further carry
The fire protecting performance of high entire plugging structure.In this way, on the basis of meeting penetrating cable through wall demand, building is greatly improved
Fire protecting performance at hole ensures the safety of people's lives and properties.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (10)
1. a kind of hole fireproof blocking method, which is characterized in that include the following steps：
S1, according to cable（4）Size fire prevention board group（1）On open up out it is several for wearing cable（4）Jack hole（2）；
S2, respectively to each inner wall of hole and fire prevention board group（1）Each lateral wall in side uniformly coats fireproof seal gum, by fire-proof plate
Group（1）Whole embedded hole so that fire prevention board group（1）Each lateral wall in side is Nian Jie with each inner wall of hole respectively, is used in combination fire prevention close
Sealing blocks fire prevention board group（1）Gap between hole；
S3, in cable（4）Material is blocked up in outside package fire prevention, by cable（4）Material, which is blocked up, together with the fire prevention is inserted into jack hole（2）,
It is used in combination fireproof seal gum to block the jack hole（2）The gap at both ends；
S4, in the fire prevention board group（1）Both sides brushing fireproof coating, fireproof coating fire prevention board group（1）On thickness at least
For 0.7mm；
S5, fire prevention board group（1）Both sides attach U.S. line paper（6）, and by U.S. line paper（6）It is completely covered by the opening at hole both ends.
2. a kind of hole fireproof blocking method according to claim 1, which is characterized in that the fire prevention board group（1）Including
Fireproof coated board（101）, the fireproof coated board（101）Parallel interval is equipped with two groups in hole.
3. a kind of hole fireproof blocking method according to claim 2, which is characterized in that the fire prevention board group（1）Also wrap
Include rock cotton board（102）, the rock cotton board（102）Positioned at two groups of fireproof coated boards（101）Between, and two fireproof coated boards
（101）And rock cotton board（102）Adjacent side is adhesively fixed.
4. a kind of hole fireproof blocking method according to claim 1, which is characterized in that after the completion of step S1, step
Before S2 starts, each inner wall of hole, fire prevention board group are first cleaned（1）Each surface in side and jack hole（2）Each inner wall.
5. a kind of hole fireproof blocking method according to claim 1, which is characterized in that it includes fire prevention that material is blocked up in the fire prevention
Pipe group（3）, cable（4）Wear the fire protection pipe group（3）, and the fire protection pipe group（3）With jack hole（2）In interference fit.
6. a kind of hole fireproof blocking method according to claim 5, which is characterized in that the fire protection pipe group（3）With line
Cable（4）Gap be packed with mineral wool（8）；It further includes being wound in cable that material is blocked up in the fire prevention（4）On fire-proof belt（7）.
7. a kind of hole fireproof blocking method according to claim 5, which is characterized in that the fire protection pipe group（3）Including
Rock wool pipe（32）And it is sheathed on rock wool pipe（32）The high temperature alloy pipes in outside（31）, the rock wool pipe（32）With high temperature alloy pipes
（31）In interference fit.
8. a kind of hole fireproof blocking method according to claim 7, which is characterized in that the rock wool pipe（32）It opens side
Equipped with hole for injecting glue（321）, the hole for injecting glue（321）Through rock wool pipe（32）Tube wall；In step s3, work as cable（4）It wears
The rock wool pipe（32）Afterwards, the injected rubber hose is first passed through to rock wool pipe（32）With cable（4）Between inject fireproof seal gum, then
The rock wool pipe（32）On be arranged high temperature alloy pipes（31）.
9. a kind of hole fireproof blocking method according to claim 1, which is characterized in that after the completion of step S2, step
Before S3 starts, is fixed simultaneously in the both sides of hole and set up cable bracket（5）, two cable brackets（5）In etc. high settings.
10. a kind of hole fireproof blocking method according to claim 1, which is characterized in that in step s 4, the fire prevention
Coating partial mulching cable（4）Positioned at fire prevention board group（1）The part of both sides, and the fireproof coating is in cable（4）Upper either side
The length of overlay area is at least 150mm, and thickness is at least 1mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810479987.8A CN108612203A (en) | 2018-05-18 | 2018-05-18 | A kind of hole fireproof blocking method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810479987.8A CN108612203A (en) | 2018-05-18 | 2018-05-18 | A kind of hole fireproof blocking method |
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| CN109193520A (en) * | 2018-10-16 | 2019-01-11 | 广州供电局有限公司 | The plugging structure and its construction method of cable aperture |
| CN109537772A (en) * | 2018-12-06 | 2019-03-29 | 安徽省人防建筑设计研究院 | A kind of civil air defense constructions and installations fireproof plugging structure |
| CN109723253A (en) * | 2019-01-08 | 2019-05-07 | 浙江华云电力工程设计咨询有限公司 | A kind of assembled substation firewall |
| CN110656708A (en) * | 2019-10-12 | 2020-01-07 | 天津安盛达防火材料有限公司 | Composite fireproof plugging plate |
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| CN112682823A (en) * | 2020-12-18 | 2021-04-20 | 江苏四知堂工程服务有限公司 | Non-invasive maintenance method for flue damage and smoke leakage |
| CN113746051A (en) * | 2021-08-13 | 2021-12-03 | 国网山东省电力公司电力科学研究院 | Cable trench fireproof sealant construction device, fireproof device and construction method |
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| CN109723253A (en) * | 2019-01-08 | 2019-05-07 | 浙江华云电力工程设计咨询有限公司 | A kind of assembled substation firewall |
| CN109723253B (en) * | 2019-01-08 | 2023-12-19 | 浙江华云电力工程设计咨询有限公司 | Firewall for assembled transformer substation |
| CN110656708A (en) * | 2019-10-12 | 2020-01-07 | 天津安盛达防火材料有限公司 | Composite fireproof plugging plate |
| CN110707632A (en) * | 2019-11-08 | 2020-01-17 | 南京聚联输变电安装有限责任公司 | Waterproof and leaking stoppage process for cable hole |
| CN110707632B (en) * | 2019-11-08 | 2020-11-20 | 南京聚联输变电安装有限责任公司 | Waterproof and leaking stoppage process for cable hole |
| CN112682823A (en) * | 2020-12-18 | 2021-04-20 | 江苏四知堂工程服务有限公司 | Non-invasive maintenance method for flue damage and smoke leakage |
| CN112682823B (en) * | 2020-12-18 | 2023-04-07 | 江苏恒建元建筑工程技术有限公司 | Non-invasive maintenance method for flue damage and smoke leakage |
| CN113746051A (en) * | 2021-08-13 | 2021-12-03 | 国网山东省电力公司电力科学研究院 | Cable trench fireproof sealant construction device, fireproof device and construction method |
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