CN105244817B - A kind of 10kV three-core cable shrinks transition joint improves mounting process - Google Patents
A kind of 10kV three-core cable shrinks transition joint improves mounting process Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007704 transition Effects 0.000 title 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052802 copper Inorganic materials 0.000 claims abstract description 39
- 239000010949 copper Substances 0.000 claims abstract description 39
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 239000000853 adhesive Substances 0.000 claims abstract description 20
- 230000001070 adhesive effect Effects 0.000 claims abstract description 20
- 239000004698 Polyethylene Substances 0.000 claims abstract description 16
- -1 polyethylene Polymers 0.000 claims abstract description 16
- 229920000573 polyethylene Polymers 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 11
- 238000011900 installation process Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000002788 crimping Methods 0.000 claims abstract description 5
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000000945 filler Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 6
- 239000012459 cleaning agent Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000006748 scratching Methods 0.000 claims description 3
- 230000002393 scratching effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 abstract description 2
- 239000004703 cross-linked polyethylene Substances 0.000 abstract description 2
- 239000004519 grease Substances 0.000 abstract description 2
- 229920001296 polysiloxane Polymers 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
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Abstract
本发明涉及一种10kV三芯电缆冷缩中间接头改进安装工艺，包括以下步骤：⑴、按尺寸剥去电缆外护套、钢带、内护层及线芯间填料；⑵、按尺寸剥去电缆的铜屏蔽和外半导电层；⑶、清洗电缆主绝缘；⑷、压接铜连接管，并分别套入冷缩接头和铜屏蔽网套，用液压钳压接铜连接管与两端导线，用半导电胶带缠绕铜导体至与主绝缘高度齐平；⑸、涂刷聚乙烯特种专用胶粘剂；⑹、涂抹双组份RTV；⑺、安装冷缩接头；⑻、套装铜屏蔽网套并搭接扁铜编织带；⑼、做防水防护和机械防护。本发明采用涂抹聚乙烯特种专用胶粘剂与RTV的工艺替代传统的硅脂涂抹工艺，能够有效平滑交联聚乙烯绝缘表层，提高附件绝缘性能，节约原料耗材并提高工作效率。The invention relates to an improved installation process of a 10kV three-core cable cold-shrink intermediate joint, which includes the following steps: (1) stripping the cable outer sheath, steel strip, inner sheath and filler between wire cores according to the size; (2) stripping off according to the size The copper shielding and outer semi-conductive layer of the cable; (3) cleaning the main insulation of the cable; (4) crimping the copper connecting tube, and inserting the cold shrinkable joint and the copper shielding net sleeve respectively, and crimping the copper connecting tube and the wires at both ends with hydraulic pliers , Wrap the copper conductor with semi-conductive tape until it is flush with the main insulation height; ⑸, apply polyethylene special adhesive; ⑹, apply two-component RTV; ⑺, install cold shrinkable joints; Connect the flat copper braid; ⑼, do waterproof protection and mechanical protection. The invention adopts the process of applying polyethylene special adhesive and RTV to replace the traditional silicone grease application process, which can effectively smooth the insulating surface of cross-linked polyethylene, improve the insulation performance of accessories, save raw materials and consumables, and improve work efficiency.
Description
技术领域technical field
本发明涉及电力电缆领域，尤其是一种10kV三芯电缆冷缩中间接头改进安装工艺。The invention relates to the field of power cables, in particular to an improved installation process for a cold-shrink intermediate joint of a 10kV three-core cable.
背景技术Background technique
电力电缆一般由导体、绝缘层和护层三部分组成，其中护层包括金属护层和橡塑护层，分别用于保证电力电缆的机械强度和防止外界侵蚀能力。Power cables are generally composed of three parts: conductor, insulating layer and sheath. The sheath includes metal sheath and rubber-plastic sheath, which are used to ensure the mechanical strength of the power cable and prevent external erosion.
限于运输条件，电力电缆通常被生产为500米一轴，当现场所需电缆长度大于500米时，通过制作中间接头连接两根电缆。中间接头主要用于恢复电力电缆的导体、绝缘层和护层三层结构。目前中间接头在安装过程中，若在剥削电缆绝缘时造成电缆划伤，则需要径向切除划伤的整段电缆，不但造成电缆消耗量大、经济成本高，而且还给工作人员带来不便，降低了工作效率。Limited to transportation conditions, power cables are usually produced as 500 meters per shaft. When the length of cables required on site is greater than 500 meters, two cables are connected by making intermediate joints. The intermediate joint is mainly used to restore the three-layer structure of the conductor, insulation layer and sheath of the power cable. At present, during the installation process of the intermediate joint, if the cable is scratched when the insulation of the cable is stripped, it is necessary to radially cut off the entire section of the scratched cable, which not only causes a large consumption of cables, high economic costs, but also brings inconvenience to the staff , reducing work efficiency.
发明内容Contents of the invention
本发明的目的在于弥补现有技术的不足之处，提供一种能够减少原材料消耗并加快工作速度的10kV三芯电缆冷缩中间接头改进安装工艺。The purpose of the present invention is to make up for the deficiencies of the prior art, and provide an improved installation process for a 10kV three-core cable cold-shrink intermediate joint that can reduce raw material consumption and speed up work.
本发明的目的是通过以下技术手段实现的：The purpose of the present invention is achieved by the following technical means:
一种10kV三芯电缆冷缩中间接头改进安装工艺，其特征在于：包括以下步骤：An improved installation process for a 10kV three-core cable cold-shrink intermediate joint, characterized in that it includes the following steps:
⑴、按照附件制造厂的安装说明书规定的尺寸剥去电缆外护套、内护层及线芯间填料，如有钢带，还需剥去钢带，钢带剥切长度主要由线芯允许弯曲半径和规定的相间距离来决定，且需考虑与所提供的冷缩套长度相适配；(1) Strip the cable outer sheath, inner sheath and filler between the wire cores according to the size specified in the installation manual of the accessory manufacturer. If there is a steel strip, the steel strip needs to be stripped. The stripping length of the steel strip is mainly allowed by the wire core It is determined by the bending radius and the specified distance between phases, and it needs to be considered to match the length of the provided cold shrink sleeve;
⑵、按照说明书规定的尺寸剥去电缆的铜屏蔽和外半导电层，在外半导电层剥离过程中应尽量避免划伤主绝缘；(2) Strip the copper shielding and outer semi-conductive layer of the cable according to the size specified in the manual, and try to avoid scratching the main insulation during the stripping of the outer semi-conductive layer;
⑶、用清洁剂清洗电缆主绝缘，但切勿使之触碰到外半导电层；(3) Clean the main insulation of the cable with a cleaning agent, but do not let it touch the outer semi-conductive layer;
⑷、压接铜连接管，并分别套入冷缩接头和铜屏蔽网套，用与导线截面相配合的液压钳分左、中、右三次压接铜连接管与两端导线；压接完成后，用半导电胶带缠绕铜导体至与主绝缘高度齐平；⑷. Crimp the copper connecting pipe, and put it into the cold shrinkable joint and the copper shielding mesh sleeve respectively, and use the hydraulic pliers matching the cross section of the wire to divide the left, middle and right three times to crimp the copper connecting pipe and the wires at both ends; the crimping is completed Finally, wrap the copper conductor with semi-conductive tape until it is level with the height of the main insulation;
⑸、涂刷聚乙烯特种专用胶粘剂：将聚乙烯特种专用胶粘剂360°均匀涂抹在中间接头表面，涂抹面积以完全覆盖主绝缘但不接触两侧的半导电层为宜；⑸. Apply polyethylene special-purpose adhesive: Apply polyethylene special-purpose adhesive 360° evenly on the surface of the intermediate joint. The area of application should completely cover the main insulation but not touch the semi-conductive layer on both sides;
⑹、涂抹双组份RTV：按照一定的比例调和A、B双组分RTV，将调和后的RTV均匀涂抹在聚乙烯特种专用胶粘剂表层，涂抹RTV约半个小时后，RTV可完全凝固；6. Apply two-component RTV: blend A and B two-component RTV according to a certain ratio, and evenly apply the blended RTV on the surface layer of polyethylene special adhesive. After about half an hour after applying RTV, RTV can be completely solidified;
⑺、根据冷缩接头长度在半导电屏蔽上作一记号，作为冷缩接头安装定位基线；将冷缩接头对准定位基线，抽掉芯绳使接头收缩，在收缩过程中校验接头中心标记与基线距离是否满足要求并及时左右调整接头位置；⑺. Make a mark on the semi-conductive shield according to the length of the cold-shrinkable joint, as the baseline for the installation and positioning of the cold-shrinkable joint; align the cold-shrinkable joint with the positioning baseline, remove the core rope to shrink the joint, and verify the center mark of the joint during the shrinkage process Whether the distance from the baseline meets the requirements and adjust the joint position left and right in time;
⑻、在接头外部套上铜屏蔽网套，并在铜屏蔽网套上面搭接扁铜编织带，用恒力弹簧将其固定在铜屏蔽网套上；⑻. Put a copper shielding net sleeve on the outside of the joint, and lap a flat copper braid on the copper shielding net sleeve, and fix it on the copper shielding net sleeve with a constant force spring;
⑼、在整个接头外面半重叠绕包防水带做防水防护，最后缠绕装甲带做机械防护。⑼. Half-overlap the waterproof tape outside the entire joint for waterproof protection, and finally wrap the armor tape for mechanical protection.
而且，在步骤⑵中，当铜屏蔽与外半导电层剥离后，最好对外半导电层边缘进行倒角处理或梯度缠绕半导电胶带，主绝缘边缘处最好进行倒角处理。Moreover, in step (2), after the copper shield is peeled off from the outer semiconductive layer, it is best to chamfer the edge of the outer semiconductive layer or wrap the semiconductive tape in gradients, and it is best to chamfer the edge of the main insulation.
而且，在步骤⑶中，如果主绝缘表面有残留半导电颗粒、划痕或凹坑，在清洗前要用不导电的、最大颗粒度为120的砂纸进行打磨处理。Also, in step (3), if there are residual semiconducting particles, scratches or pits on the surface of the main insulation, sand it with non-conductive sandpaper with a maximum grit size of 120 before cleaning.
而且，在步骤⑷中，铜导体缠绕的半导电胶带高度不应高出主绝缘，以避免产生气隙。Moreover, in step (4), the height of the semi-conductive tape wrapped around the copper conductor should not be higher than the main insulation to avoid air gaps.
而且，步骤⑸所述的聚乙烯特种专用胶粘剂应在接触空气后1小时之内使用。Moreover, the polyethylene special-purpose adhesive described in step (5) should be used within 1 hour after exposure to air.
而且，步骤⑹所述的双组分RTV中，A组分为粘胶剂，B组分为固化剂，A、B两组分的重量比为1～1.5:100，两种组分在混合搅拌均匀后应静置10分钟左右以排出气泡，应在接触空气后4小时之内使用。Moreover, in the two-component RTV described in step (6), component A is an adhesive, component B is a curing agent, and the weight ratio of the two components of A and B is 1 to 1.5:100, and the two components are mixed After stirring evenly, it should be left to stand for about 10 minutes to expel air bubbles, and it should be used within 4 hours after exposure to air.
本发明的优点和积极效果是：Advantage and positive effect of the present invention are:
1、本发明提供了一种10kV三芯电缆冷缩中间接头改进安装工艺流程，采用涂抹聚乙烯特种专用胶粘剂与RTV的工艺替代传统的硅脂涂抹工艺，能够有效平滑交联聚乙烯绝缘表层，提高附件绝缘性能。1. The present invention provides an improved installation process for a 10kV three-core cable cold-shrinkable intermediate joint. The process of applying polyethylene special adhesive and RTV is used to replace the traditional silicone grease application process, which can effectively smooth the insulating surface of cross-linked polyethylene. Improve the insulation performance of accessories.
2、采用本发明所述的工艺流程，可以通过涂抹双组份RTV实现划伤绝缘层在一定程度上的修复，节约耗材。2. Using the technological process described in the present invention, the scratched insulation layer can be repaired to a certain extent by applying two-component RTV, saving consumables.
3、采用本发明所述的工艺流程可以降低操作难度，提高工作效率。3. Adopting the technological process described in the present invention can reduce the difficulty of operation and improve work efficiency.
具体实施方式Detailed ways
下面结合附图详细叙述本发明的实施例；需要说明的是，本实施例是叙述性的，不是限定性的，不能以此限定本发明的保护范围。The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be noted that the embodiments are illustrative, not restrictive, and cannot limit the protection scope of the present invention.
一种10kV三芯电缆冷缩中间接头改进安装工艺，包括以下步骤：An improved installation process for a 10kV three-core cable cold-shrink intermediate joint, including the following steps:
⑴、按照附件制造厂的安装说明书规定的尺寸剥去电缆外护套、内护层及线芯间填料，如有钢带，还需剥去钢带，钢带剥切长度主要由线芯允许弯曲半径和规定的相间距离来决定，且需考虑与所提供的冷缩套长度相适配；(1) Strip the cable outer sheath, inner sheath and filler between the wire cores according to the size specified in the installation manual of the accessory manufacturer. If there is a steel strip, the steel strip needs to be stripped. The stripping length of the steel strip is mainly allowed by the wire core It is determined by the bending radius and the specified distance between phases, and it needs to be considered to match the length of the provided cold shrink sleeve;
⑵、按照说明书规定的尺寸剥去电缆的铜屏蔽和外半导电层，在外半导电层剥离过程中应尽量避免划伤主绝缘；当铜屏蔽与外半导电层剥离后，最好对外半导电层边缘进行倒角处理或梯度缠绕半导电胶带，主绝缘边缘处最好进行倒角处理；(2) Strip the copper shielding and outer semiconductive layer of the cable according to the size specified in the manual. During the stripping of the outer semiconductive layer, try to avoid scratching the main insulation; when the copper shield is stripped from the outer semiconductive layer, it is best to The edge of the layer is chamfered or gradiently wound with semi-conductive tape, and it is best to chamfer the edge of the main insulation;
⑶、用清洁剂清洗电缆主绝缘，但切勿使之触碰到外半导电层；如果主绝缘表面有残留半导电颗粒、划痕或凹坑，在清洗前要用不导电的、最大颗粒度为120的砂纸进行打磨处理；⑶. Clean the main insulation of the cable with a cleaning agent, but do not let it touch the outer semiconductive layer; if there are residual semiconductive particles, scratches or pits on the surface of the main insulation, use a non-conductive, largest particle cleaning agent before cleaning. Sandpaper with a degree of 120 for grinding;
⑷、压接铜连接管，并分别套入冷缩接头和铜屏蔽网套，用与导线截面相配合的液压钳分左、中、右三次压接铜连接管与两端导线；压接完成后，用半导电胶带缠绕铜导体至与主绝缘高度齐平；铜导体缠绕的半导电胶带高度不应高出主绝缘，以避免产生气隙；⑷. Crimp the copper connecting pipe, and put it into the cold shrinkable joint and the copper shielding mesh sleeve respectively, and use the hydraulic pliers matching the cross section of the wire to divide the left, middle and right three times to crimp the copper connecting pipe and the wires at both ends; the crimping is completed Finally, wrap the copper conductor with a semi-conductive tape until it is level with the height of the main insulation; the height of the semi-conductive tape wrapped around the copper conductor should not be higher than the main insulation to avoid air gaps;
⑸、涂刷聚乙烯特种专用胶粘剂：聚乙烯特种专用胶粘剂应在接触空气后1小时之内使用。将胶粘剂360°均匀涂抹在中间接头表面，涂抹面积以完全覆盖主绝缘但不接触两侧的半导电层为宜(聚乙烯特种专用胶粘剂为绝缘材料，绝对不可涂抹在外半导电层和导体上缠绕的半导电胶带之上)；⑸. Apply polyethylene special adhesive: polyethylene special adhesive should be used within 1 hour after exposure to air. Apply the adhesive 360° evenly on the surface of the intermediate joint. It is advisable that the area of application should completely cover the main insulation but not touch the semi-conductive layer on both sides (the special special adhesive for polyethylene is an insulating material, and it must not be applied on the outer semi-conductive layer and the conductor to be wound. on the semi-conductive tape);
⑹、涂抹双组份RTV(室温硫化硅橡胶)：按照一定的比例调和A、B双组分RTV，A组分为粘胶剂，B组分为固化剂，A、B两组分的重量比为1～1.5:100，两种组分在混合搅拌均匀后应静置10分钟左右以排出气泡，应在接触空气后4小时之内使用；6. Apply two-component RTV (room temperature vulcanized silicone rubber): reconcile A and B two-component RTV according to a certain ratio, A component is adhesive, B component is curing agent, the weight of A and B two components The ratio is 1 to 1.5:100. The two components should be left to stand for about 10 minutes after mixing and stirring to remove air bubbles. They should be used within 4 hours after exposure to air;
将调和后的RTV均匀涂抹在聚乙烯特种专用胶粘剂表层，涂抹RTV约半个小时后，RTV可完全凝固；聚乙烯特种专用胶粘剂涂抹10分钟后可涂抹双组分RTV，双组分RTV涂抹30分钟后凝固，可套入冷缩终端或接头；双组分RTV采用涂抹工艺，避免采用涂刷工艺，避免施涂过厚影响凝固时间；双组分RTV为绝缘材料，绝对不可涂抹在外半导电层和导体上缠绕的半导电胶带之上；Spread the blended RTV evenly on the surface of the polyethylene special adhesive, and about half an hour after the RTV is applied, the RTV can be completely solidified; 10 minutes after the polyethylene special adhesive is applied, the two-component RTV can be applied, and the two-component RTV can be applied for 30 minutes. It solidifies in minutes and can be inserted into the cold-shrinkable terminal or joint; the two-component RTV adopts the smearing process, avoiding the use of brushing process, and avoiding too thick application to affect the setting time; the two-component RTV is an insulating material, and it must not be applied on the outer semi-conductive layers and conductors wrapped with semi-conductive tape;
⑺、根据冷缩接头长度在半导电屏蔽上作一记号，作为冷缩接头安装定位基线；将冷缩接头对准定位基线，抽掉芯绳使接头收缩，在收缩过程中校验接头中心标记与基线距离是否满足要求并及时左右调整接头位置；⑺. Make a mark on the semi-conductive shield according to the length of the cold-shrinkable joint, as the baseline for the installation and positioning of the cold-shrinkable joint; align the cold-shrinkable joint with the positioning baseline, remove the core rope to shrink the joint, and verify the center mark of the joint during the shrinkage process Whether the distance from the baseline meets the requirements and adjust the joint position left and right in time;
⑻、在接头外部套上铜屏蔽网套，并在铜屏蔽网套上面搭接扁铜编织带，用恒力弹簧将其固定在铜屏蔽网套上；⑻. Put a copper shielding net sleeve on the outside of the joint, and lap a flat copper braid on the copper shielding net sleeve, and fix it on the copper shielding net sleeve with a constant force spring;
⑼、在整个接头外面半重叠绕包防水带做防水防护，最后缠绕装甲带做机械防护。⑼. Half-overlap the waterproof tape outside the entire joint for waterproof protection, and finally wrap the armor tape for mechanical protection.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510626756.1A CN105244817B (en) | 2015-09-28 | 2015-09-28 | A kind of 10kV three-core cable shrinks transition joint improves mounting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510626756.1A CN105244817B (en) | 2015-09-28 | 2015-09-28 | A kind of 10kV three-core cable shrinks transition joint improves mounting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105244817A CN105244817A (en) | 2016-01-13 |
| CN105244817B true CN105244817B (en) | 2018-07-03 |
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| CN117995468A (en) * | 2023-12-27 | 2024-05-07 | 江苏嘉盟电力设备有限公司 | Intermediate cold-shrink cable accessory for crosslinked polyethylene insulated power cable |
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