CN104682271A - Construction method of flexible metal sheath insulation cable - Google Patents
Construction method of flexible metal sheath insulation cable Download PDFInfo
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- CN104682271A CN104682271A CN201510134865.1A CN201510134865A CN104682271A CN 104682271 A CN104682271 A CN 104682271A CN 201510134865 A CN201510134865 A CN 201510134865A CN 104682271 A CN104682271 A CN 104682271A
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Abstract
The invention discloses a construction method of a flexible metal sheath insulation cable. The construction method comprises eight steps of field transportation, cabling, line arrangement, insulation testing, copper sheath layer stripping, pouring of an insulation adhesive for seal filling, thermal shrinkage of a lead insulation pipe and lead connection. By the construction method of the flexible metal sheath insulation cable, the flexible metal sheath insulation cable can be laid like a common cable; the construction method is easy to learn and operate by constructors; the construction efficiency is improved; moreover, the construction safety is improved greatly.
Description
Technical field
The present invention relates to cable construction method, be specially flexible metal jacket insulation cable construction method.
Background technology
Flexible metal jacket insulation cable is the flexible mineral insulation cable of new generation developed on the basis of magnesium oxide mineral insulation cable, its copper sheath adopts dark embossing, conductor adopts that strand copper wire is stranded forms, conductor is the same with common cable, but the density of its copper material and the surface area of conductor are all much bigger than real core copper bar, cable is relatively soft, and strictly can control insulation thickness and the not easily moisture absorption.Meanwhile, metal sheath inorganic mineral insulation cable fire-resistance property is high, and limiting temperature is 108 DEG C, nontoxic during burning, still can the integrality of holding circuit after 3 hours flame temperature 950-1000 DEG C of burning.
But flexible metal jacket insulation cable, to execute man-haur efficiency often very low, extends the duration.Therefore, for flexible metal jacket insulation cable, obtain the target that a kind of high efficiency construction method becomes those skilled in the art's pursuit.
Summary of the invention
For solving defect in prior art, the invention provides a kind of flexible metal jacket insulation cable construction method, comprising the steps,
S1: onsite moving, by rolling cable axle carrying cable, when cable axle having arrow, rolls according to cable axle upward arrow direction indication; Time on cable axle without arrow, roll according to cable winding direction;
Adopt rolling cable axle and the way utilizing mechanical transport, can greatly reduce artificial consumption, coefficient of safety also increases.
S2: adopt level or vertical mode cabling;
S3: arrange circuit, comprises whole line, fixing and making nameplate three steps;
S4: carry out Insulation test to cable, ensures that the insulating resistance value between wire and copper sheath is more than or equal to 20M Ω;
S5: divest the sheath outside insulated cable, prepares for connecting wire;
S6: pour into the insulating cement for sealing filling, with the insulating resistance value of megohmmeter test cable heart yearn again before perfusion;
S7: pyrocondensation wire insulation pipe, is slowly heated to binding post place by cable termination with blowtorch slow fire;
S8: connect wire.
Further, in S2 step, when adopting horizontal mode cabling, by cable unreeling rack or expansion rotating disk cabling.
The present invention utilizes cable unreeling rack or launches rotating disk and unclamped by cable, and the mode adopting the steel wire rope string bag and hoist engine to coordinate for large gauge cable is laid, and solves cable bend and causes the inaesthetic problem of circuit.
Further, in S2 step, when adopting vertical mode cabling, the mode cabling guided by pulley.
Utilize the mode of the mechanical bond such as artificial and pulley when vertically laying, the manpower of half can be saved compared with traditional overhead cabling method, and improve the efficiency of laying, unsafe factor when laying is reduced simultaneously.
Further, in S2 step, use the straight cable of clamping plate guide wheel.
Lay also in addition specification for single-core cable, when cable goes wrong, neat cable can improve the efficiency of inquiry fault point.
Further, in S3 step, during the laying of single-core cable, each return cable spacing is greater than the twice of the outside diameter of cable.
Further, in S3 step, moving towards of whole cable is parallel, and the bending radius at turning is identical.
Further, in S4 step, when the insulation resistance between wire and copper sheath is lower than 20M Ω, finds out cable and to make moist place, use torch flame heating to drive tide, until reach more than 20M Ω.
Beneficial effect of the present invention is: by jacket insulation cable construction method in flexible metal of the present invention, flexible metal jacket insulation cable can be laid as common cable, the advantage of flexible mineral cable can be given full play to, meet the demand of user greatly.
Method of the present invention is easy to be learnt by workmen and operate, human and material resources are saved, improve the efficiency and success rate of laying, one-time success rate can reach 99.5%, solve a difficult problem for high-rise building flexible metal jacket insulation cable laying, considerably reduce and repeat to install expend artificial, and the fail safe of construction is greatly improved.
Accompanying drawing explanation
Fig. 1 is flexible metal jacket insulation cable construction method block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, explanation is explained in detail to structure of the present invention.
As shown in Figure 1, flexible metal jacket insulation cable construction method, comprises the steps:
S1: onsite moving; During cable short-haul operation, the method for rolling cable axle can be adopted, should roll by cable axle upward arrow direction indication during rolling, as during without arrow, can roll by cable winding direction, can't roll, in order to avoid cable slack by anti-winding direction; Can, according to on-site actual situations, utilize the plant equipment such as fork truck, crane, elevator to carry during long-distance transportation, but the protected working of cable should be carried out when carrying, in order to avoid damage cable.
S2: cabling; Cable be laid with horizontal laying and vertical run two kinds.When the identical place of trend is laid, should, according to the bifurcation mouth position of cable from the near to the remote by connecting up, affect attractive in appearance to avoid cable to intersect.
During horizontal laying, can cable unreeling rack be used according to cable length or launch rotating disk, cable be unclamped, cabling.Cable is placed in pay off rack or launches on rotating disk, use external force traction cable end after cable is fixing, in the present embodiment, the cable that, route longer for length is more straight, can use hoist engine to carry out traction unwrapping wire.The direct trailing cable end of small dimension, small bore cable metal lift hook just can realize unwrapping wire; Can the steel wire rope string bag be adopted in cable core end to be protected by cable end when large gauge, electric cable with large cross-section lay, then use hoist engine to carry out traction unwrapping wire.After traction is fixing, cable is directly through crane span structure or vertical shaft, and because of case of bending when cable dispatches from the factory into dish, effect may unsightly, can allow cable by a straight cable of clamping plate guide wheel, then can solve cable bend and cause whole circuit inaesthetic sorry.Cable lays along crane span structure, under the effect of tractive effort, moves forward, conveniently unwrapping wire, can arrange some directive wheels, so that cable passes through setting regions below cable.After cable laying, shutoff should be carried out to its termination in time.
During vertical run, before laying, cable shaft passage should be checked, carry out preparation and the protected working of cable laying.When laying, cable is carried to highest point by workmen, if there is rotating disc type pay off rack, can be placed on rotating disk by cable, rotates rotating disk, on one side releases cable straightening, downwards slowly payout, puts while straightening.In the overall circuit laid, stand a workman at appropriate intervals place, assists cable to lay smoothly, until cable laying put in place downwards.For skyscraper, cable hank can be transported to corresponding floor by the first floor through hole for hoist or elevator.In each floor desired location, hoist engine is set respectively, fixes suspension centre, adjust position.Cable is drawn from the upper end of dish and is slowly promoted after haulage cable clamping and discharges.The mode that the mode of cable laying adopts " from top to bottom or from the bottom up " is laid.The selection in cable bearer erection place, convenient for principle to lay, generally should be advisable near cable terminal.During erection, should note the rotation direction of cable axle, the upper end of cable Ying Congpan is drawn, and cable should do not made to draw at support and ground friction, prevents the mechanical damage such as cable wringing, insulation broken skin.The cable top steel wire rope string bag is fixed, is connected with steel wire rope of windlass by swivel coupling; Check whether links is ready to, check that cable promotes by errorless rear crawl hoist engine, in lifting process, hoist engine can only be crawl, bottom cable hank manpower rotates, and must ensure enough length and promote for hoist engine, electrical hoist place and cable unreeling rack place must have special messenger to take charge, and staff intercom, to stop crawl hoist engine in time when facing a danger.
S3: circuit arranges;
After same line arrangement, reply circuit carries out arranging and fixing, to meet construction requirement.The arrangement of circuit comprises whole line, fixing and making three, nameplate work.The method arranged first is separated by road by cable, and the every root cable of straightening, is then fixed cable spacing on request.If a road cable has three or four, then should bundle after straightening, an other road is applied again in every Zheng Hao mono-tunnel, in order to avoid get wrong.Laying of single-core cable should be carried out according to the cable phase sequence aligning method listed by following table, and each return cable spacing should not be less than the twice of the outside diameter of cable.Should carry out piecemeal to end from top to bottom, from front to back, from beginning during arrangement.At turning, the bending radius of cable by regulation should be bent.After same line arrangement, reply circuit carries out arranging and fixing, to meet construction requirement.
S4: Insulation test;
After Cable Management is fixing, determine two ends cable length, in possible situation, at curved one " S " of the back segment of two end cables curved or " Ω " curved, for subsequent use to do, excise superfluous cable subsequently.With the insulation resistance of the every core of 1000V megohmmeter test cable, require by root measure traverse line and wire, the insulation resistance between wire and copper sheath, at more than 20M Ω, as lower than 20M Ω, then all should should find out the place that makes moist, and drive tide, until reach more than 20M Ω with torch flame heating.
S5: divest copper sheath;
According to the length of copper sheath, determine the stripping length of two end cables, do a mark at copper sheath stripping mouth, with diagonal cutting pliers stripping cable copper sheath, any device removing copper sheath also can being adopted to divest copper sheath, preparing for connecting wire.
S6: pour into the insulating cement for sealing filling;
After divesting copper sheath, remove the burr of stripping incision, clean cable copper sheath and wire with clean cotton yarn or cotton, put cable terminal and accessory kit thereof.The insulation resistance of cable core is tested again, in case have short phenomenon when copper sheath stripping mouth place and installing terminal with megohmmeter.Then sealing is poured into cable termination and fill insulating cement, gradually inject from side, until go out to slightly depositing benefit from the opposite side of copper tank is full.Cable conductor is bent to wiring place, measures the position that copper tip is connected with wire, sawed-off redundance, then carry out the installation of binding post, adopt hydraulic tongs to crimp on request.
S7: pyrocondensation wire insulation pipe;
The reservation length of every heart yearn packs into heat shrinkage insulation pipe respectively, is slowly heated by cable termination with blowtorch slow fire to binding post place, makes heat-shrink tube uniform shrinkage, tests the insulation resistance of cable afterwards again.
S8: connect wire; Carry out wire connection after filling adhesive curing to be sealed, according to the phase place of cable, the phase place of wiring place, by root bending forming, then uses bolt, cable is connected on equipment by screw.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all do in flesh and blood of the present invention any amendment, equivalent to replace and simple modifications etc., all should be included within protection scope of the present invention.
Claims (7)
1. flexible metal jacket insulation cable construction method, is characterized in that: comprise the steps,
S1: onsite moving, by rolling cable axle carrying cable, when cable axle having arrow, rolls according to cable axle upward arrow direction indication; Time on cable axle without arrow, roll according to cable winding direction;
S2: adopt level or vertical mode cabling;
S3: arrange circuit, comprises whole line, fixing and making nameplate three steps;
S4: carry out Insulation test to cable, ensures that the insulating resistance value between wire and copper sheath is more than or equal to 20M Ω;
S5: divest the sheath outside insulated cable, prepares for connecting wire;
S6: pour into the insulating cement for sealing filling, with the insulating resistance value of megohmmeter test cable heart yearn before perfusion;
S7: pyrocondensation wire insulation pipe, is slowly heated to binding post place by cable termination with blowtorch slow fire;
S8: connect wire.
2. jacket insulation cable construction method in flexible metal according to claim 1, is characterized in that: in S2 step, when adopting horizontal mode cabling, by cable unreeling rack or expansion rotating disk cabling.
3. jacket insulation cable construction method in flexible metal according to claim 1, is characterized in that: in S2 step, when adopting vertical mode cabling, and the mode cabling guided by pulley.
4. the flexible metal jacket insulation cable construction method according to claim 1,2 or 3, is characterized in that: in S2 step, uses the straight cable of clamping plate guide wheel.
5. jacket insulation cable construction method in flexible metal according to claim 1, is characterized in that: in S3 step, and during the laying of single-core cable, each return cable spacing is greater than the twice of the outside diameter of cable.
6. flexible metal jacket insulation cable construction method according to claim 1 or 5, it is characterized in that: in S3 step, moving towards of whole cable is parallel, and the bending radius at turning is identical.
7. jacket insulation cable construction method in flexible metal according to claim 1, it is characterized in that: in S4 step, when the insulation resistance between wire and copper sheath is lower than 20M Ω, finds out cable and to make moist place, torch flame heating is used to drive tide, until reach more than 20M Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134865.1A CN104682271A (en) | 2015-03-26 | 2015-03-26 | Construction method of flexible metal sheath insulation cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510134865.1A CN104682271A (en) | 2015-03-26 | 2015-03-26 | Construction method of flexible metal sheath insulation cable |
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| CN104682271A true CN104682271A (en) | 2015-06-03 |
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| CN201510134865.1A Pending CN104682271A (en) | 2015-03-26 | 2015-03-26 | Construction method of flexible metal sheath insulation cable |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546651A (en) * | 2017-09-22 | 2018-01-05 | 浩翔电气集团有限公司 | A kind of crane span structure cable laying method |
| CN110649524A (en) * | 2019-09-26 | 2020-01-03 | 广东省工业设备安装有限公司 | Mineral cable construction method for super high-rise building |
| CN111653983A (en) * | 2020-05-22 | 2020-09-11 | 郑州市泰安路桥工程有限公司 | Construction process of fire-resistant mineral cable |
| CN112490945A (en) * | 2020-11-10 | 2021-03-12 | 上海宝冶集团有限公司 | Quality control method for improving one-time success rate of withstand voltage of cable sheath |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633583A (en) * | 2013-11-20 | 2014-03-12 | 国家电网公司 | Cable off-bridge guiding method based on combined type cable guiding cage |
| JP2014195394A (en) * | 2013-03-01 | 2014-10-09 | Kubota-C. I Co Ltd | Construction method of cable protection pipe, identification cap for use therein, and cable protection conduit |
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2015
- 2015-03-26 CN CN201510134865.1A patent/CN104682271A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014195394A (en) * | 2013-03-01 | 2014-10-09 | Kubota-C. I Co Ltd | Construction method of cable protection pipe, identification cap for use therein, and cable protection conduit |
| CN103633583A (en) * | 2013-11-20 | 2014-03-12 | 国家电网公司 | Cable off-bridge guiding method based on combined type cable guiding cage |
Non-Patent Citations (1)
| Title |
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| XUJIAN6977: "矿物绝缘电缆施工工法", 《百度文库》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546651A (en) * | 2017-09-22 | 2018-01-05 | 浩翔电气集团有限公司 | A kind of crane span structure cable laying method |
| CN110649524A (en) * | 2019-09-26 | 2020-01-03 | 广东省工业设备安装有限公司 | Mineral cable construction method for super high-rise building |
| CN111653983A (en) * | 2020-05-22 | 2020-09-11 | 郑州市泰安路桥工程有限公司 | Construction process of fire-resistant mineral cable |
| CN112490945A (en) * | 2020-11-10 | 2021-03-12 | 上海宝冶集团有限公司 | Quality control method for improving one-time success rate of withstand voltage of cable sheath |
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Application publication date: 20150603 |
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