CN104917115A - Fire protection method for cable intermediate connector on cable bridge - Google Patents
Fire protection method for cable intermediate connector on cable bridge Download PDFInfo
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- CN104917115A CN104917115A CN201510349985.3A CN201510349985A CN104917115A CN 104917115 A CN104917115 A CN 104917115A CN 201510349985 A CN201510349985 A CN 201510349985A CN 104917115 A CN104917115 A CN 104917115A
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Abstract
A fire protection method for a cable intermediate connector on a cable bridge comprises the following steps: firstly, the cable intermediate connector arranged on the cable bridge is completely wrapped in a fire protection and explosion-proof box; secondly, cables on the two sides of the fire protection and explosion proof box are wrapped with fire protection materials, and the fire protection materials are clamped on the peripheries of the cables by using fixing parts; thirdly, the cable adjacent to the cable intermediate connector on the cable bridge is wrapped with the fire protection material, and the fire protection material is clamped on the periphery of the cable by using the fixing parts; and finally, a fire protection partition is arranged between the adjacent cables on the periphery of the cable intermediate connector on the cable bridge, and the fire protection partition and the cables are fixed in parallel through support parts. The fire protection material is ceramic fiber blanket, the fire protection partition is made from expandable polystyrene, a plurality of bubbles are arranged in the fire protection partition, and a flame retardant is arranged on the inner walls of the bubbles. The fire protection method for the cable intermediate connector on the cable bridge can fundamentally solve the problems of failure and secondary damage of the cable intermediate connector, has relatively good fire protection performance and outstanding flame-retardation effect, and is high in safety.
Description
Technical field
The present invention relates to a kind of cable fire-proof method, belong to the security maintenance measure in cable use procedure, particularly relate to a kind of cable intermediate joint method of fire protection on cable testing bridge.
Background technology
Supply of electric power is as the necessity in people's life, and its safe operation and maintenance have important effect.Along with increasing of cable laying, usually arrangement many can be concentrated on cable testing bridge, with conserve space.In daily use, the fault of power cable mostly occurs in transition joint, may breaking out of fire, will the cable at adjacent cable and cable intermediate joint two ends on shot-firing cable crane span structure further after catching fire, and expands the cost of loss range and maintenance.
At present, to the fire-proof and explosion-proof measure of cable intermediate joint mainly at employing fire-resistant anti-explosion box, by cable intermediate joint is coated in fire-resistant anti-explosion box, during central indirect head fail, by contingent fire control in box body, and can not ignite transition joint two ends or adjacent cable.But in actual motion, when cable end breaks down, electric arc can be produced, temperatures as high 4000-5000K, fire-resistant anti-explosion box is breakdown or melting often, and the rubber melting burning splashes down to surrounding, and then ignite two ends or adjacent cable, produce fire, therefore, the limited efficiency that existing fire-resistant anti-explosion box is fire-proof and explosion-proof.
Chinese patent (application number 201410462362.2, application publication number CN104218501A) discloses a kind of cable intermediate joint construction method with waterproof fireproofing explosion prevention function, comprise step a. and cold shrink tube is set in cable intermediate joint place, then begin through colloidal liquid from the lap position of cable body and cold shrink tube to carry out 360 ° to cold shrink tube and hold coating, complete the pretreatment work of cable intermediate joint; B. the cold shrink tube outer cup dress fire prevention shell on the cable intermediate joint that preliminary treatment is good.The problem that is tightly connected of what this construction method mainly solved is cable intermediate joint and fire-resistant anti-explosion box, but after fundamentally solution cable intermediate joint fault punctures fire-resistant anti-explosion box, the spot fire caused is to the damage of adjacent cable, and therefore, fireproofing function is still limited.In addition, adopt the method step complicated, the engineering time is long, and to be especially coated in lap-joint's effect of cold shrink tube and cable body uncontrollable for colloidal liquid.
Summary of the invention
The invention provides a kind of fail safe instrument for open manhole cover, it is by coated fire proofing material on the cable at fire-resistant anti-explosion box two ends and adjacent cable, and fire barrier is set between adjacent cable, fundamentally solve the secondary damage problem that cable intermediate joint fault causes, fail safe is high, cost is low and operating procedure is simple.
The present invention is achieved by the following technical programs:
Cable intermediate joint method of fire protection on cable testing bridge, comprises the following steps:
A, will the cable intermediate joint on cable testing bridge be arranged in, first be coated on completely in fire-resistant anti-explosion box;
Secondly b, at the coated fire proofing material of the cable of fire-resistant anti-explosion box both sides, with fixture, fire proofing material is clamped in cable periphery;
C, then by coated for cable adjacent with cable intermediate joint on cable testing bridge fire proofing material, with fixture, fire proofing material is clamped in cable periphery;
D, last, on cable testing bridge and between the adjacent cable of cable intermediate joint surrounding, arrange fire barrier, fire barrier is fixed by strutting piece is parallel with cable.
Cable intermediate joint method of fire protection on cable testing bridge as above, described fire proofing material is ceramic fiber blanket, and described fixture is snap ring.
Cable intermediate joint method of fire protection on cable testing bridge as above, described fire barrier is made up of expandable polystyrene material, be provided with multiple bubble in expandability polystyrene material, be filled with inert gas in described bubble, its inwall is provided with fire retardant.
Cable intermediate joint method of fire protection on cable testing bridge as above, described strutting piece is the straight-bar being arranged on fire barrier both sides, and the two ends of straight-bar are fixed with fire barrier and fire proofing material respectively.
Cable intermediate joint method of fire protection on cable testing bridge as above, described fire retardant is dilatancy waterborne flame retardant inorganic agent, calculate by weight composition, be made up after mix and blend of the Silicone acrylic emulsion of 14-20%, the chromium compounds of 3-6%, the magnesium aluminum compounds of 12-17%, the deoxidation alkaline water of 58-65%, the coalescents of 4-8%.
Cable intermediate joint method of fire protection on cable testing bridge as above, described dilatancy waterborne flame retardant inorganic agent, calculate by weight composition, the Silicone acrylic emulsion by 15%, the chromium compounds of 5%, 15% magnesium aluminum compounds, the deoxidation alkaline water of 60%, the coalescents of 5% make after mix and blend.
Cable intermediate joint method of fire protection on cable testing bridge as above, the described fire proofing material length coated at the cable of armored cassette both sides is 200-400mm, the coated described fire proofing material length of the cable that in the cable, joint is adjacent is 400-800mm, and the horizontal length of described fire barrier is 500-1000mm.
Advantage of the present invention is:
1 adopts fire-resistant anti-explosion box to compare the measure that cable intermediate joint carries out security protection with in prior art, the present invention can indirect head fail in the cable, breakdown or the melting of fire-resistant anti-explosion box is caught fire, can by fire control in transition joint region, transition joint two ends and adjacent cable can not be spread to, and then the scope of fire can be reduced and avoid secondary to endanger, reduce property loss.
2, simply, small investment, cost are low for the present invention's construction and installation, can according to the position of cable intermediate joint and specific environment, design fire prevention mount scheme, to existing transition joint fire prevention measure transformation conveniently.
What 3, have essential distinction relative to existing cable intermediate joint fire prevention measure is, transition joint method of fire protection of the present invention, not only can prevent transition joint fault to ignite the problem of two end cables and adjacent cable, and can by the inert gas that arranges in fire barrier and fire retardant, case of fire is effectively suppressed, cuts off the pyric chain of fire.Specifically, the problem of coated fire proofing material for splashing down to surrounding after solving rubber combustion, and employing ceramic fiber blanket, it is when being subject to high temperature attack, the outer surface of cooling protection cable is carried out by release chemically combined water of crystallization, and stop heat conduction significantly, avoiding secondary to endanger, is the ground floor barrier of transition joint fail safe; In addition, the fire barrier arranged between adjacent cable, inert gas and fire retardant can be discharged in the case of a high temperature, magnesium aluminum compounds decomposes in fire retardant absorbs a large amount of heats, and then the pyric chain of interruptible price fire, wherein chromium compound can pray the effect pressing down cigarette, is convenient to the rescue of fire fighter.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.
Fig. 1 is installation site of the present invention schematic diagram.
Fig. 2 is the I partial enlargement structural representation in Fig. 1.
Fig. 3 is the schematic diagram of the first embodiment.
Fig. 4 is the schematic diagram of the second embodiment.
Fig. 5 is the schematic diagram of the third embodiment.
Reference numeral: 1-cable; 2-fire-resistant anti-explosion box; 3-fire proofing material; 4-fire barrier; 5-bubble; 6-fire retardant.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one:
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of cable intermediate joint method of fire protection on cable testing bridge of the present embodiment, comprises the following steps:
By cable 1 transition joint be arranged on cable testing bridge, be first coated in fire-resistant anti-explosion box 2 completely; Secondly, at the coated fire proofing material 3 of the cable 1 of fire-resistant anti-explosion box 2 both sides, with fixture, fire proofing material 3 is clamped in cable 1 periphery; Then by coated for cable adjacent with cable intermediate joint on cable testing bridge fire proofing material 3, with fixture, fire proofing material is clamped in cable periphery; Finally, on cable testing bridge and between the adjacent cable of cable intermediate joint surrounding, arrange fire barrier 4, fire barrier 4 is parallel with cable fixing by strutting piece.
Described fire proofing material 3 is ceramic fiber blanket, and described fixture is snap ring.Ceramic fibre is a kind of fibrous light refractory material, has the advantages such as lightweight, high temperature resistant, thermal capacitance is little, insulation excellent heat insulating performance, high-temperature heat insulation are functional, non-toxic.Described fire barrier 4 is made up of expandable polystyrene material, and be provided with multiple bubble 5 in expandability polystyrene material, be filled with inert gas in described bubble, its inwall is provided with fire retardant 6.Described strutting piece is the straight-bar being arranged on fire barrier 4 both sides, and the two ends of straight-bar are fixed with fire barrier 4 and fire proofing material 3 respectively.Described fire retardant is dilatancy waterborne flame retardant inorganic agent, calculates by weight composition, the Silicone acrylic emulsion by 14%, the chromium compounds of 6%, 17% magnesium aluminum compounds, the deoxidation alkaline water of 58%, the coalescents of 5% make after mix and blend.Described fire proofing material 3 length coated at the cable of fire-resistant anti-explosion box both sides is 200-400mm, and coated described fire proofing material 3 length of the cable that in the cable, joint is adjacent is 400-800mm, and the horizontal length of described fire barrier 4 is 500-1000mm.
The technological process of production of described dilatancy waterborne flame retardant inorganic agent is divided into the steps such as batching, mixing, grinding distribution, stirring, precipitation, filtration to produce: after being mixed by raw material, obtain through the stirring of 3-5 time, precipitation, filtration, wherein, the time of each stirring is 10-20 minute, and the time of each precipitation is 30 minutes.
This product and Performance Detection pack steps such as dispatching from the factory, and technological process as shown in Figure 1.
(1) various powder weighs up by formula and carries out grinding and sieving by batching, requires that granularity is more than 200 orders (0.054mm).
(2) deoxidation alkaline water drops in enamel reaction by formula by mixing, the pH value of deoxidation alkaline water is about 6, start motor mixer, then add high-speed stirring (800 turns/more than min) about the 30min such as chromium compounds, magnalium compound and coalescents successively, be prepared into slip.
(3) test sieved filter by 200 object standards, then carry out second time, the stirring of third time, precipitation and filtration by above-mentioned requirements and produce fire retardant mixed liquor.
Embodiment two:
As shown in Figure 1, Figure 2, Figure 4 shows, the difference of the present embodiment and embodiment one is, the cable intermediate joint in embodiment one is in middle level, and its surrounding all needs to arrange fire barrier 4, and the cable intermediate joint in the present embodiment is in orlop, fire barrier 4 can not be arranged in its bottom surface.
Described fire retardant in the present embodiment is dilatancy waterborne flame retardant inorganic agent, calculate by weight composition, the Silicone acrylic emulsion by 20%, the chromium compounds of 3%, 12% magnesium aluminum compounds, the deoxidation alkaline water of 61%, the coalescents of 4% make after mix and blend.Described fire proofing material 3 length coated at the cable of fire-resistant anti-explosion box both sides is 200-400mm, and coated described fire proofing material 3 length of the cable that in the cable, joint is adjacent is 400-800mm, and the horizontal length of described fire barrier 4 is 500-1000mm.
Embodiment three:
As shown in Figure 1, Figure 2, Figure 5, the difference of the present embodiment and embodiment one, two is, cable intermediate joint is in the superiors, and fire barrier 4 can not be arranged in its top.But according to the needs of field condition, if the top of joint is also provided with other the cable such as communication, data in the cable simultaneously, also should arranges fire barrier, not be damaged to protect other cables.
Described dilatancy waterborne flame retardant inorganic agent in the present embodiment, calculates by weight composition, the Silicone acrylic emulsion by 15%, the chromium compounds of 5%, 15% magnesium aluminum compounds, the deoxidation alkaline water of 60%, the coalescents of 5% make after mix and blend.Prove through detection experiment, adopt fire retardant composition in the present embodiment, it is better that institute has fire protecting performance, and duration of fire resistance is longer.Described fire proofing material 3 length coated at the cable of fire-resistant anti-explosion box both sides is 200-400mm, and coated described fire proofing material 3 length of the cable that in the cable, joint is adjacent is 400-800mm, and the horizontal length of described fire barrier 4 is 500-1000mm.
The technology contents of the not detailed description of the present invention is known technology.
Claims (7)
1. the cable intermediate joint method of fire protection on cable testing bridge, is characterized in that, comprise the following steps:
A, will the cable intermediate joint on cable testing bridge be arranged in, first be coated on completely in fire-resistant anti-explosion box;
Secondly b, at the coated fire proofing material of the cable of fire-resistant anti-explosion box both sides, with fixture, fire proofing material is clamped in cable periphery;
C, then by coated for cable adjacent with cable intermediate joint on cable testing bridge fire proofing material, with fixture, fire proofing material is clamped in cable periphery;
D, last, on cable testing bridge and between the adjacent cable of cable intermediate joint surrounding, arrange fire barrier, fire barrier is fixed by strutting piece is parallel with cable.
2. the cable intermediate joint method of fire protection on cable testing bridge according to claim 1, is characterized in that, described fire proofing material is ceramic fiber blanket, and described fixture is snap ring.
3. the cable intermediate joint method of fire protection on cable testing bridge according to claim 1, it is characterized in that, described fire barrier is made up of expandable polystyrene material, multiple bubble is provided with in expandability polystyrene material, be filled with inert gas in described bubble, its inwall is provided with fire retardant.
4. the cable intermediate joint method of fire protection on cable testing bridge according to claim 1, is characterized in that, described strutting piece is the straight-bar being arranged on fire barrier both sides, and the two ends of straight-bar are fixed with fire barrier and fire proofing material respectively.
5. the cable intermediate joint method of fire protection on cable testing bridge according to claim 3, it is characterized in that, described fire retardant is dilatancy waterborne flame retardant inorganic agent, calculate by weight composition, be made up after mix and blend of the Silicone acrylic emulsion of 14-20%, the chromium compounds of 3-6%, the magnesium aluminum compounds of 12-17%, the deoxidation alkaline water of 58-65%, the coalescents of 4-8%.
6. the cable intermediate joint method of fire protection on cable testing bridge according to claim 5, it is characterized in that, described dilatancy waterborne flame retardant inorganic agent, calculate by weight composition, the Silicone acrylic emulsion by 15%, the chromium compounds of 5%, 15% magnesium aluminum compounds, the deoxidation alkaline water of 60%, the coalescents of 5% make after mix and blend.
7. the cable intermediate joint method of fire protection on cable testing bridge according to claim 1, it is characterized in that, the described fire proofing material length coated at the cable of fire-resistant anti-explosion box both sides is 200-400mm, the coated described fire proofing material length of the cable that in the cable, joint is adjacent is 400-800mm, and the horizontal length of described fire barrier is 500-1000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510349985.3A CN104917115A (en) | 2015-06-23 | 2015-06-23 | Fire protection method for cable intermediate connector on cable bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510349985.3A CN104917115A (en) | 2015-06-23 | 2015-06-23 | Fire protection method for cable intermediate connector on cable bridge |
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| CN104917115A true CN104917115A (en) | 2015-09-16 |
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| CN201510349985.3A Pending CN104917115A (en) | 2015-06-23 | 2015-06-23 | Fire protection method for cable intermediate connector on cable bridge |
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Cited By (3)
| 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 |
| CN110416936A (en) * | 2019-08-08 | 2019-11-05 | 常州市沃科科技有限公司 | A kind of fire-proof and explosion-proof heat-insulation blanket, cable, cable connector and cable laying structure |
| WO2022073520A1 (en) * | 2020-10-10 | 2022-04-14 | 天津首瑞智能电气有限公司 | Cable |
Citations (4)
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| JPH11332053A (en) * | 1998-05-15 | 1999-11-30 | Hitachi Cable Ltd | Method for treating high-voltage fireproof cable terminal and high-voltage fireproof cable connecting part |
| CN101323727A (en) * | 2008-07-18 | 2008-12-17 | 大连理工大学 | Environment-friendly aqueous expansion type fireproof coating and preparation thereof |
| CN202602237U (en) * | 2011-12-27 | 2012-12-12 | 金华电业局 | Fixed support of cable intermediate joint |
| CN103709431A (en) * | 2013-12-18 | 2014-04-09 | 镇江森华阻燃工程科技有限公司 | Polystyrene with high flame retardant property and preparation method thereof |
-
2015
- 2015-06-23 CN CN201510349985.3A patent/CN104917115A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11332053A (en) * | 1998-05-15 | 1999-11-30 | Hitachi Cable Ltd | Method for treating high-voltage fireproof cable terminal and high-voltage fireproof cable connecting part |
| CN101323727A (en) * | 2008-07-18 | 2008-12-17 | 大连理工大学 | Environment-friendly aqueous expansion type fireproof coating and preparation thereof |
| CN202602237U (en) * | 2011-12-27 | 2012-12-12 | 金华电业局 | Fixed support of cable intermediate joint |
| CN103709431A (en) * | 2013-12-18 | 2014-04-09 | 镇江森华阻燃工程科技有限公司 | Polystyrene with high flame retardant property and preparation method thereof |
Cited By (3)
| 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 |
| CN110416936A (en) * | 2019-08-08 | 2019-11-05 | 常州市沃科科技有限公司 | A kind of fire-proof and explosion-proof heat-insulation blanket, cable, cable connector and cable laying structure |
| WO2022073520A1 (en) * | 2020-10-10 | 2022-04-14 | 天津首瑞智能电气有限公司 | Cable |
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Application publication date: 20150916 |
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