CN101252266B - Mounting process of three-core cable shrink terminal - Google Patents
Mounting process of three-core cable shrink terminal Download PDFInfo
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- CN101252266B CN101252266B CN2008101039785A CN200810103978A CN101252266B CN 101252266 B CN101252266 B CN 101252266B CN 2008101039785 A CN2008101039785 A CN 2008101039785A CN 200810103978 A CN200810103978 A CN 200810103978A CN 101252266 B CN101252266 B CN 101252266B
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Abstract
The invention discloses installation technique of a cold shrinkable terminal of a three core cable, belonging to power transmission system in power cable installation field. The technique includes the following steps: unwrapping the outer cover of the cable, installing the mutually insulated ground wire and the reversely folded ground wire, sheathing a three-finger sleeve onto the root of the three core cable, respectively sheathing the cold shrinkable jackets onto the cable cores which are provided with copper shields, and finally installing the cold shrinkable terminal and crimping wiring terminals on the cable cores with copper shields. In the technique, sealing and insulation operations are critical to the long time safe operation of the power transmission system above 15kv, and the power transmission system the damp-proof, explosion-proof and flame-retardant safety properties. The installation technique is simple and easy and is highly efficient.
Description
Technical field
The invention belongs to power cable mounting technology field in the electrical power transmission system, particularly a kind of mounting process of three-core cable shrink terminal.
Background technology
Traditional thermal shrinkage type cable termination mostly is pottery greatly or other insulating material are made insulator, material does not have elasticity, adopt wrapped formula, combine not tight with cable core or cable sheathing, easy watered and wetting, electric lower with mechanical strength, the mounting process more complicated, parts damage easily in the installation process, thereby be subjected to the restriction of material behavior, the interface field intensity is on the low side, is difficult to satisfy the needs of the above electrical power transmission system long-term safety operation of 15kv, and traditional mounting technique does not possess protection against the tide, safety function such as explosion-proof and fire-retardant.
Summary of the invention
The purpose of this invention is to provide a kind of mounting process of three-core cable shrink terminal, it is characterized in that, concrete installation steps are as follows:
1) with the cable jacket 1 of its end of cable strip off after the alignment, exposes three cable cores;
2) getting first constant force spring 3 is clamped on ground wire 2 on the steel armour, and cut the steel armour along first constant force spring 3 upper ends, excise inner sheath after measuring 10mm backward by excision steel armour end, and wrap up a circle PVC tape respectively in the end of three cable cores and mark 6, prevent that copper shield 5 is scattered;
3) with single-coated foam 4 first constant force spring 3 is twined some circles, make it and cable jacket 1 smooth connection, end volume one with another ground wire encloses again, insert the three-core cable root, and with screwdriver to the root push-tight, to remain ground wire and enclose three-phase copper shield 5 outsides coiling one circle back reflexed downwards, form reflexed ground wire 7, with second constant force spring 3 reflexed ground wire 7 is tightened again, with single-coated foam 4 second constant force spring 3 wrapped, and ground wire 2 and reflexed ground wire 7 separately are wrapped on the cable jacket 1;
4) get tri-finger stall 8, supporter core rope 10 extractions in the tri-finger stall pipe 9 of tri-finger stall 8 are a bit of, be inserted in the three-core cable root then gently, extract supporter core ropes 10 in the tri-finger stall pipe 9 out, extract supporter core ropes 10 in the tri-finger stall 8 again out;
5) cable core that respectively shrinkage protecting pipe 11 is inserted in band copper shield 5 overlaps 10mm at least to tri-finger stall pipe 9;
6) tip cut-off shrinkage protecting pipe 11 and copper shield 5 on the shrinkage protecting pipe 11 of distance tri-finger stall pipe 9 suitable distances, expose semi-conductive layer and main insulation 12, outwards the semi-conductive layer incision position is whittled into the inclined-plane with guarded blade utility knife by main insulation 12 respectively, and measure 50mm backward at the semi-conductive layer fracture, on shrinkage protecting pipe 11, carry out mark 6 with PVC tape, note not polishing semi-conductive layer;
7) clean main insulation 12 surfaces, confirm the no conductive particle in main insulation surface, evenly smear silicone grease on its surface, get shrinkage terminal 13 then respectively, and extract a bit of supporter core rope 10 out from shrinkage terminal 13 butt end heads, and aim at mark 6 on the shrinkage protecting pipe 11 with shrinkage terminal 13 butt end heads, be inserted in the cable core of band main insulation 12, shrinkage terminal 13 is overlapped location, mark 6 places to the shrinkage protecting pipe 11, extracts supporter core ropes 10 in the shrinkage terminal 13 out;
8) measure terminal hole apart from 5mm from the other end 5mm of distance shrinkage terminal 13, excise unnecessary shrinkage protecting pipe 11, expose the cable core of being with main insulation 12, and divest main insulation 12, the main insulation incision position is whittled into fillet, expose the cable core of being with copper shield 5, and be inserted in binding post 14, crimping is firm, remove burr, and twine single-coated foam 4 in crimping place and main insulation incision position, thickness is consistent with the excircle of shrinkage terminal 13, form the tapered overlap joint of smooth excessiveness, and sealed insulation overlap joint end..
The ground wire 2 of described step 3 and reflexed ground wire 7 will guarantee the two mutually insulated.
Described step 5 also comprises, if shrinkage terminal mounting process is out of doors during terminal applies, then the tri-finger stall end after shrinking upwards to be dug, and digging the cable jacket winding single-coated foam 4 of part, after smearing a circle binding agent, turn back tri-finger stall, and twine single-coated foam 4 enhanced leaktightness in tri-finger stall end and cable jacket junction.
Described shrinkage terminal applies is when the open air, in step 5) and 7) in, smear binding agent in the junction of parts, or twine the single-coated foam enhanced leaktightness in the junction.
Effect intentionally of the present invention is to adopt shrinkage terminal assembling electrical power transmission system, characteristics according to the shrinkage terminal adopt new mounting process, this technology have mounting process simple, understand, grasp easily, high efficiency, can satisfy the needs of the above electrical power transmission system long-term safety of 15kv operation, possess protection against the tide, safety function such as explosion-proof and fire-retardant.
Description of drawings
Fig. 1 is the strip off cable jacket, exposes three cable core process schematic representations.
Fig. 2 is for installing the process schematic representation of tri-finger stall.
Fig. 3 is a cable core main insulating layer treatment process schematic diagram.
Fig. 4 is three-core cable shrink terminal mounting structure figure.
Embodiment
The invention provides a kind of mounting process of three-core cable shrink terminal.Below in conjunction with accompanying drawing, be example with the 15KV mounting process of three-core cable shrink terminal, specify installation steps of the present invention:
1) make moist in order to reduce cable end, pollution or the uneven influence that brings, the cable after the alignment is measured more than the 900mm backward by cable end, the cable jacket 1 of opening the stripping end exposes three cable cores;
2) getting first constant force spring 3 is clamped on ground wire 2 on the steel armour, and cut the steel armour along first constant force spring 3 upper ends, after measuring 10mm backward, steel armour end excises inner sheath by excising, note not injuring copper shield 5, and wrap up red, yellow, the green three coloring agent bands of a circle PVC in the end of three cable cores respectively and mark 6, prevent that copper shield 5 is scattered (as shown in Figure 1);
3) with single-coated foam 4 first constant force spring 3 is twined some circles, make it and cable jacket 1 smooth connection, thickness can not surpass cable jacket 2mm, end volume one with another ground wire encloses again, insert the three-core cable root, and with screwdriver to the root push-tight, to remain ground wire and enclose three-phase copper shield 5 outsides coiling one circle back reflexed downwards, form reflexed ground wire 7, with second constant force spring 3 reflexed ground wire 7 is tightened, pay special attention to, ground wire 2 and reflexed ground wire 7 are separately, not on same axis, guarantee the two mutually insulated;
4) with single-coated foam 4 second constant force spring 3 wrapped, and ground wire 2 and reflexed ground wire 7 separately are wrapped on the cable jacket 1, the thickness of single-coated foam 4 can not surpass cable jacket 2mm (as shown in Figure 1);
5) get tri-finger stall 8, supporter core rope 10 extractions in the tri-finger stall pipe 9 of tri-finger stall 8 are a bit of, be inserted in the three-core cable root then gently, extract supporter core ropes 10 in the tri-finger stall pipe 9 out, extract supporter core ropes 10 in the tri-finger stall 8 again out; If shrinkage terminal mounting process is out of doors during terminal applies, then the tri-finger stall end after shrinking upwards to be dug, and digging winding single-coated foam 4 on the cable jacket partly, after smearing a circle binding agent, turn back tri-finger stall, and twine single-coated foam 4 enhanced leaktightness in tri-finger stall end and cable jacket junction.
6) extract out supporter core rope in the shrinkage protecting pipe 11 10 a bit of respectively, the cable core that is inserted in band copper shield 5 then gently is to tri-finger stall pipe 9, at least overlap 10mm, extract supporter core rope 10 (as shown in Figure 2) in the shrinkage protecting pipe 11 out, if outdoor terminal will be smeared the binding agent enhanced leaktightness in lap-joint;
7) tip cut-off shrinkage protecting pipe 11 and copper shield 5 on the shrinkage protecting pipe 11 of distance tri-finger stall pipe 9 suitable distances, expose semi-conductive layer and main insulation 12, outwards the semi-conductive layer incision position is whittled into the inclined-plane with guarded blade utility knife by main insulation 12 respectively, and measure 50mm backward at the semi-conductive layer fracture, on shrinkage protecting pipe 11, carry out mark 6 with PVC tape, (as shown in Figure 3), note not polishing semi-conductive layer;
8) with emery cloth strip cleaning main insulation 12 surfaces, confirm the no conductive particle in main insulation 12 surfaces, then with cleaning paper cleaning main insulation surface, behind careful inspection main insulation no conductive particle in surface and the impurity, evenly smear silicone grease on its surface, get shrinkage terminal 13 then respectively, and extract a bit of supporter core rope 10 out from shrinkage terminal 13 butt end heads, aim at mark 6 on the shrinkage protecting pipe 11 with shrinkage terminal 13 butt end heads, be inserted in the cable core of band main insulation 12, shrinkage terminal 13 is overlapped location, mark 6 places to the shrinkage protecting pipe 11, extracts supporter core ropes 10 in the shrinkage terminal 13 out; If outdoor terminal will be smeared the binding agent enhanced leaktightness in lap-joint.
9) measure terminal hole apart from 5mm from the other end 5mm of distance shrinkage terminal 13, excise unnecessary shrinkage protecting pipe 11, expose the cable core of being with main insulation 12, and divest main insulation 12, the main insulation incision position is whittled into fillet, expose the cable core of being with copper shield 5, and be inserted in binding post 14 (as shown in Figure 4), crimping is firm, remove burr, and twine single-coated foam 4 in crimping place and main insulation incision position, thickness is consistent with the excircle of shrinkage terminal 13, form the tapered overlap joint of smooth excessiveness, and sealed insulation overlap joint end.
Claims (5)
1. a mounting process of three-core cable shrink terminal is characterized in that, concrete installation steps are as follows:
1) with the cable jacket (1) of its end of cable strip off after the alignment, exposes three cable cores;
2) getting first constant force spring (3) is clamped on ground wire (2) on the steel armour, and on first constant force spring (3), cut the steel armour, after measuring 10mm backward, steel armour end excises inner sheath by excising, and wrap up a circle PVC tape in the end of three cable cores respectively and mark (6), prevent that copper shield (5) is scattered;
3) with single-coated foam (4) first constant force spring (3) is twined some circles, make it and cable jacket (1) smooth connection, end volume one with another ground wire encloses again, insert the three-core cable root, and with screwdriver to the root push-tight, to remain ground wire and enclose three-phase copper shield (5) outside coiling one circle back reflexed downwards, form reflexed ground wire (7), use second constant force spring (3) that reflexed ground wire (7) is tightened again, with single-coated foam (4) second constant force spring (3) wrapped, and ground wire (2) and reflexed ground wire (7) separately are wrapped on the cable jacket (1);
4) get tri-finger stall (8), extract out the supporter core rope (10) in the tri-finger stall pipe (9) of tri-finger stall (8) a bit of, be inserted in the three-core cable root then gently, extract tri-finger stall pipe (9) interior supporter core rope (10) out, extract tri-finger stall (8) interior supporter core rope (10) again out;
5) cable core that respectively shrinkage protecting pipe (11) is inserted in band copper shield (5) overlaps 10mm at least to tri-finger stall pipe (9);
6) in distance tri-finger stall pipe (9) the suitably last tip cut-off shrinkage protecting pipe (11) and the copper shield (5) of the shrinkage protecting pipe (11) of distance, expose semi-conductive layer and main insulation (12), use guarded blade utility knife outwards the semi-conductive layer incision position to be whittled into the inclined-plane respectively by main insulation (12), and measure 50mm backward at the semi-conductive layer fracture, on shrinkage protecting pipe (11), carry out mark (6) with PVC tape, note not polishing semi-conductive layer;
7) clean main insulation (12) surface, confirm the no conductive particle in main insulation surface, evenly smear silicone grease on its surface, get shrinkage terminal (13) then respectively, and extract a bit of supporter core rope (10) out from shrinkage terminal (13) butt end head, aim at shrinkage protecting pipe (11) with shrinkage terminal (13) butt end head and go up mark (6), be inserted in the cable core of band main insulation (12), shrinkage terminal (13) is overlapped to the last mark (6) of shrinkage protecting pipe (11) and is located the location, extracts shrinkage terminal (13) interior supporter core rope (10) out;
8) measure terminal hole apart from 5mm from the other end 5mm of distance shrinkage terminal (13), excise the cable core that unnecessary shrinkage protecting pipe (11) exposes band main insulation (12), and divest main insulation (12), the main insulation incision position is whittled into fillet, the cable core that exposes band copper shield (5), and be inserted in binding post (14), crimping is firm, remove burr, and at crimping place and main insulation incision position winding single-coated foam (4), thickness is consistent with the excircle of shrinkage terminal, forms the tapered overlap joint of smooth excessiveness, and sealed insulation overlap joint end; Finish the installation of three-core cable shrink terminal.
2. according to the described mounting process of three-core cable shrink terminal of claim 1, it is characterized in that ground wire of described step 3) (2) and reflexed ground wire (7) will guarantee the two mutually insulated;
3. according to the described mounting process of three-core cable shrink terminal of claim 1, it is characterized in that, described step 5) also comprises, if shrinkage terminal mounting process is out of doors during terminal applies, then the tri-finger stall end after shrinking upwards to be dug, and, after smearing a circle binding agent, turn back tri-finger stall, and twine single-coated foam (4) enhanced leaktightness in tri-finger stall end and cable jacket junction digging the cable jacket winding single-coated foam (4) of part.
4. according to the described mounting process of three-core cable shrink terminal of claim 1, it is characterized in that described shrinkage terminal applies in step 5) and step 7), is smeared binding agent in the junction of parts when the open air, or twine the single-coated foam enhanced leaktightness in the junction.
5. according to the described mounting process of three-core cable shrink terminal of claim 1, it is characterized in that described single-coated foam is a PVC tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101039785A CN101252266B (en) | 2008-04-14 | 2008-04-14 | Mounting process of three-core cable shrink terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101039785A CN101252266B (en) | 2008-04-14 | 2008-04-14 | Mounting process of three-core cable shrink terminal |
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| Publication Number | Publication Date |
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| CN101252266A CN101252266A (en) | 2008-08-27 |
| CN101252266B true CN101252266B (en) | 2010-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101039785A Expired - Fee Related CN101252266B (en) | 2008-04-14 | 2008-04-14 | Mounting process of three-core cable shrink terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611861A (en) * | 2017-10-26 | 2018-01-19 | 天津市金钟东大电力安装工程有限责任公司 | A kind of manufacturing cable head technique |
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| CN102340116A (en) * | 2011-09-02 | 2012-02-01 | 巩义市供电公司 | Method for connecting ground wire of power cable terminal |
| CN102780195A (en) * | 2012-07-27 | 2012-11-14 | 中国二十二冶集团有限公司 | 10-35KV cold-shrink cable terminal and manufacture method thereof |
| CN103001104A (en) * | 2012-12-13 | 2013-03-27 | 辽宁省电力有限公司锦州供电公司 | Method for cutting copper shielding layer of 10kV/35kV electric power distribution cables |
| CN103124060B (en) * | 2012-12-28 | 2016-09-28 | 深圳市沃尔核材股份有限公司 | A kind of optical fiber composite medium-pressure cable cold-shrinkable terminal and installation method thereof |
| CN104113019B (en) * | 2014-05-30 | 2016-09-07 | 南通贝斯特船舶与海洋工程设计有限公司 | A kind of preparation method of multicore hv cable termination |
| CN108081567B (en) * | 2017-12-26 | 2022-05-24 | 深圳市沃尔核材股份有限公司 | Production method and production system of thermal shrinkage branch finger stall |
| CN110011232B (en) * | 2019-03-28 | 2020-09-25 | 北京首都机场动力能源有限公司 | Butting method of 10kV three-core cable |
| CN110707611B (en) * | 2019-11-08 | 2020-09-11 | 南京聚联输变电安装有限责任公司 | Improved installation process for cold-shrinkage terminal of three-core cable |
-
2008
- 2008-04-14 CN CN2008101039785A patent/CN101252266B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611861A (en) * | 2017-10-26 | 2018-01-19 | 天津市金钟东大电力安装工程有限责任公司 | A kind of manufacturing cable head technique |
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Owner name: BEIJING GUODIAN RUIFENG ELECTRICAL CO., LTD. Free format text: FORMER NAME: GFE SYNTHETIC ELECTRIC (BEIJING) CO., LTD. |
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Address after: 101500, oasis Industrial Development Zone, 30-2 West Avenue, Beijing, Miyun Patentee after: BEIJING GUODIAN RUIFENG ELECTRIC CO., LTD. Address before: 101500, oasis Industrial Development Zone, 30-2 West Avenue, Beijing, Miyun Patentee before: Gfe Synthetic Electric (Beijing) Co., Ltd. |
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Granted publication date: 20101027 Termination date: 20180414 |