WO2023206753A1 - 耐高温电缆接头密封工艺 - Google Patents

耐高温电缆接头密封工艺 Download PDF

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Publication number
WO2023206753A1
WO2023206753A1 PCT/CN2022/100013 CN2022100013W WO2023206753A1 WO 2023206753 A1 WO2023206753 A1 WO 2023206753A1 CN 2022100013 W CN2022100013 W CN 2022100013W WO 2023206753 A1 WO2023206753 A1 WO 2023206753A1
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Prior art keywords
heat shrink
glue
outer sheath
heat
shrink tube
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PCT/CN2022/100013
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English (en)
French (fr)
Inventor
刘焱鑫
隋明辉
刘彤彤
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常州船用电缆有限责任公司
江苏中利集团股份有限公司
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Publication of WO2023206753A1 publication Critical patent/WO2023206753A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/048—Crimping apparatus or processes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/024—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of braided metal wire
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/005—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing

Definitions

  • the invention relates to the technical field of power cables, specifically a high-temperature resistant cable joint sealing process.
  • the purpose of the present invention is to provide a safe and reliable joint sealing process for high-temperature resistant cables.
  • the basic technical solution to achieve the purpose of the present invention is: a high-temperature resistant cable joint sealing process, which includes the following steps:
  • Step 1 Fix and clean the outer surface of the cable.
  • Step 2 Peel off the outer layers of the inner sheath to expose the inner sheath.
  • Step 3 From the main core port downward, peel off the conductor insulation layer to expose the corresponding length of conductor.
  • Step 4 Put the corresponding heat shrink tube on the outer sheath and the three main wire cores.
  • Step 5 Crimp and fix the corresponding terminal blocks on the three main wire cores.
  • Step 6 Heat shrink the heat shrink tube on the outer sheath first, and heat shrink it into a bell mouth shape with the opening upward.
  • Step 7 Fill the heat shrink tube on the outer sheath with glue.
  • Step 8 Heat shrink the heat shrink tube on each main wire core. Put the heat shrink tube on the main wire core upward to cover the terminal block, and then heat shrink it from top to bottom to seal the corresponding part of the terminal block. The lower part of the heat shrink tube is left open to form a bell mouth shape with the opening downward.
  • Step 9 Fill the heat shrink tube on the main wire core with glue.
  • Step 10 After the glue solidifies, heat shrink the opening of the heat shrink tube on the outer sheath. Heat shrink the openings of the heat shrink tubes on each main wire core.
  • step one includes the following steps:
  • Step 1.1 Use clamp 10 to fix one end of the cable vertically upward, leaving no less than 400mm of cable above the fixed position of the clamp.
  • Step 1.2 Use alcohol wipe to clean the outer surface of the cable.
  • the second step includes the following steps:
  • Step 2.1 Mark the distance 300mm from the cable end, cut the outer sheath of the cable with a utility knife, and peel off the outer sheath.
  • Step 2.2 Peel off the third lining layer and cut off the third lining layer at the fracture of the outer sheath.
  • Step 2.3 Reversely disassemble the cable braided shielding layer to the fracture of the outer sheath, and then tie it down to the outer sheath in strips.
  • Step 2.4 Use a utility knife to circumferentially cut the first lining layer at the fracture of the outer sheath, and then peel off the first lining layer.
  • Step 2.5 Cut off the root filler strip at the fracture of the outer sheath.
  • each strip of the disassembled braided shielding layer is re-twisted into a small braid and placed along with the main wire core.
  • step six includes the following steps:
  • Step 6.1 Measure 100mm downward from the break of the outer sheath, and mark the outer sheath of the cable with PVC tape.
  • the lower side of the PVC tape is 100mm away from the break of the outer sheath.
  • About 20mm of the lower part of the heat shrink tube put on the outer sheath has been shrunk, that is, stop heat shrinking, and leave the upper part
  • the opening forms an upward bell-mouth shape, and the opening is used for filling glue.
  • step seven includes the following steps:
  • Step 7.1 Stir the glue thoroughly and let it stand to drain out any gas that may be introduced during stirring.
  • Step 7.2 Use a needle to slowly inject glue into the heat-shrinkable tube from the upper port of the heat-shrinkable tube on the outer sheath.
  • the amount of glue injected is 15mm from the upper port of the heat-shrinkable tube.
  • Glue is injected slowly and continuously from one side of the tube, allowing the glue to drain all the air inside the heat shrink tube.
  • Step 7.3 Leave it at room temperature for 24 hours until the glue solidifies.
  • step nine includes the following steps:
  • Step 9.1 Bend the upper end of each main wire core downward so that the opening of the heat shrink tube on the main wire core faces upward.
  • the upper opening of the shrink tube is 10mm.
  • Glue is injected slowly and continuously from one side of the tube, allowing the glue to drain all the air inside the heat shrink tube.
  • Step 9.2 Leave it at room temperature for 24 hours until the glue solidifies.
  • the present invention has the following beneficial effects: (1)
  • the high-temperature resistant cable joint sealing process of the present invention is easy to operate, can effectively prevent saturated water vapor and other harmful gases from diffusing outward from between the various structural layers of the cable, and greatly improves the safety of use. .
  • (2) In order to facilitate operation and glue filling, fix one end of the cable vertically upward. When filling glue, make sure that all the air in the heat shrink tube is drained out under the action of gravity.
  • step two retain the braided shielding layer and cut off the remaining structural layers between the inner sheath and the outer sheath. After filling with glue, the cut areas can be completely covered. The braided shielding layer is covered in glue.
  • the braided shielding layer adopts a "braid" process, which is more conducive to glue sealing and grounding.
  • Both ends of the heat-shrinkable tube are heat-shrunk to form a shuttle shape, which firmly fixes the glue inside and provides good sealing.
  • the inner wall of the heat shrinkable tube of the present invention is coated with glue, which has high temperature and high pressure resistance, and is easier to fuse with the two-component epoxy glue CC01 to promote end sealing.
  • the conductor of the main core of the present invention adopts a crimping sealed terminal process, which can effectively ensure electrical and mechanical connections.
  • Figure 1 is a schematic structural diagram of the cable of the present invention.
  • Figure 2 is a schematic diagram after the cable end is installed with a fixing device.
  • Figure 3 is a schematic diagram after peeling off each outer layer of the inner sheath.
  • Figure 4 is a schematic diagram after peeling off the outer layer of the cable core.
  • Figure 5 is a schematic diagram of the conductors exposed after peeling off the outer layer of each wire core.
  • Figure 6 is a schematic diagram of the process of preparing a shielding layer.
  • Figure 7 is a schematic diagram when the outer sheath and main wire core are covered with heat shrink tube.
  • Figure 8 is a schematic diagram after installing the copper wiring terminals.
  • Figure 9 is a schematic diagram after processing the lower end of the heat shrink tube on the outer sheath.
  • Figure 10 is a schematic diagram of the heat shrinkable tube glued on the outer sheath.
  • Figure 11 is a schematic diagram of one end of the heat shrink tube on the main wire core after heat shrink treatment.
  • Figure 12 is a schematic diagram of filling the heat shrink tube with glue on the main wire core.
  • Figure 13 is a schematic diagram of the other end of the heat shrink tube after heat shrinkage.
  • Inner lining layer 3 first lining layer 3-1, second lining layer 3-2, third lining layer 3-3,
  • a high temperature resistant cable joint sealing process includes the following steps:
  • the high temperature resistant cable includes a main core 1, an inner sheath 2, an inner lining layer 3, an outer sheath 4 and a filler strip 5.
  • the three main wire cores 1 are all provided with conductors 1-1 and conductor insulation layers 1-2 sequentially from the inside to the outside along their respective radial directions.
  • the conductor insulation layer 1-2 covers the outside of the conductor 1-1.
  • the three main wire cores 1 and the three filler strips 5 are twisted into a cable, and then the inner sheath 2 is squeezed into the cable.
  • the lining layer 3 includes a first lining layer 3-1 and a second lining layer 3-2.
  • the inorganic fiber tape is wrapped around the inner sheath 2 to form the first lining layer 3-1, and the wrapping rate is 40% to 50%.
  • the second lining layer 3-2 is braided with tinned copper wire to form a braided shielding layer outside the first lining layer 3-1, and its braiding coverage is 88% to 90%.
  • the inorganic fiber tape is wrapped around the second lining layer 3-2 to form the third lining layer 3-3, and the wrapping coverage rate is 40% to 50%.
  • the outer sheath 4 is extruded and wrapped on the outside of the third inner lining layer 3-3.
  • Step 1 See Figure 2, fix and clean the outer surface of the cable.
  • Step 1.1 Use the clamp 10 to fix one end of the cable vertically upward, leaving a distance d1 of the cable above the fixed position of the clamp.
  • the distance d1 is not less than 400mm.
  • Step 1.2 After fixing the cable, wipe and clean the outer surface of the cable outer sheath with alcohol.
  • Step 2 See Figure 3 and Figure 4. Peel off the outer layers of the inner sheath to expose the inner sheath.
  • Step 2.1 Mark a distance d2 from the cable end.
  • the distance d2 is not less than 300mm.
  • Step 2.2 Peel off the third lining layer 3-3 and cut the third lining layer 3-3 at the fracture of the outer sheath 4.
  • Step 2.3 Reversely disassemble the cable braided shielding layer to the fracture of outer sheath 4, and then tie it down to the outer sheath 4 in strips.
  • Step 2.4 Use a utility knife to circumferentially cut the first lining layer 3-1 at the fracture of the outer sheath 4, and then peel off the first lining layer 3-1.
  • Step 2.5 Cut three filler strips 5 at the fracture of the outer sheath 4.
  • the main wire core 1 must not be damaged when cutting the first lining layer 3-1 and the filler strip 5.
  • Step 3 See Figure 5. From the main core core 2 port downward, peel off the 35mm conductor insulation layer 1-2 to expose the corresponding length of conductor 1-1. Strip the conductor insulation layer 1-2 without damaging the conductor 1-1.
  • Step 4 See Figure 6 and Figure 7. Re-twist each strip of the disassembled braided shielding layer into a small braid and place it together with the main wire core 1.
  • the corresponding heat shrink tubes 6 are put on the outer sheath 4 and the three main wire cores 1 respectively.
  • the inner wall of the heat shrink tube 6 is coated with hot melt glue.
  • the hot melt glue is a highly plastic adhesive. Under heating, it can be completely bonded with glue to form a tight sealing film.
  • Step 5 As shown in Figure 8, use hydraulic pliers to crimp the corresponding terminals 7 on the conductor 1-1 ends of the three main wire cores 1 through the crimping closed terminal process to form an electrical connection.
  • Step 6 See Figure 9, first heat shrink the heat shrink tube 6 on the outer sheath 4, and heat shrink it into a bell mouth shape with the opening upward.
  • Step 6.1 Measure 100mm downward from the break of outer sheath 4, and use PVC tape to mark the outer sheath 4 of the cable.
  • the lower side of the PVC tape is 100mm away from the break of outer sheath 4.
  • make the lower opening of the heat shrink tube 6 flush with the lower side of the PVC tape that is, the lower end of the heat shrink tube 6 is put outside the PVC tape
  • heat shrink from bottom to top and put the heat shrink tube 6 on the outer sheath 4
  • About 20mm of the lower part has been shrunk, that is, the heat shrinkage has stopped, and the upper part is left open to form an upward bell mouth shape, and the opening is used for filling glue.
  • Step 7 As shown in Figure 10, the heat shrink tube 6 on the outer sheath 4 is filled with glue.
  • Step 7.1 Stir the glue thoroughly and let it stand to remove any gas that may be introduced during the stirring.
  • This example uses two-component epoxy glue CC01.
  • Step 7.2 Use a needle to slowly inject glue into the heat shrink tube 6 from the upper port of the heat shrink tube 6 on the outer sheath 4.
  • the amount of glue injected should be about 15mm from the upper port of the heat shrink tube 6.
  • Glue is injected slowly and continuously from one side of the tube, allowing the glue to drain out all the air in the heat shrink tube 6, and the glue is bonded to the hot melt glue on the inner wall of the heat shrink tube 6.
  • Step 7.3 Leave it at room temperature for 24 hours until the glue solidifies.
  • Step 8 See Figure 11, heat shrink the heat shrink tube 6 on each main wire core 1. Put the heat shrink tube 6 on the main wire core 1 upward to cover the terminal 7, and then heat shrink it about 10mm from top to bottom to seal the corresponding part of the terminal 7. The lower part of the heat shrink tube 6 is left open to form a bell mouth shape with the opening facing downward.
  • Step 9 See Figure 12. The heat shrink tube 6 on the main wire core 1 is filled with glue.
  • Step 9.1 Bend the upper end of each main wire core 1 downward so that the opening of the heat shrink tube 6 on the main wire core 1 faces upward.
  • a needle to slowly inject the glue described in step 8 from the opening of the heat shrink tube 6 into the heat shrinkable tube.
  • the amount of glue injected should be about 10mm from the upper opening of heat shrink tube 6.
  • Glue is injected slowly and continuously from one side of the tube, allowing the glue to drain out all the air in the heat shrink tube 6, and the glue is bonded to the hot melt glue on the inner wall of the heat shrink tube 6.
  • Step 9.2 Leave it at room temperature for 24 hours until the glue solidifies.
  • Step 10 See Figure 13. After the glue solidifies, heat shrink the opening of the heat shrink tube 6 on the outer sheath 4. Heat shrink the opening of the heat shrink tube 6 on each main wire core 1 .
  • the high-temperature resistant cable joint sealing process of the present invention performs corresponding processing on each layer, thereby completely sealing the end and effectively preventing high-temperature and high-pressure gas from spreading longitudinally along the cable.

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  • Manufacturing & Machinery (AREA)
  • Cable Accessories (AREA)

Abstract

提供了一种耐高温电缆接头密封工艺，包括以下步骤：固定并清洁电缆外表面。剥出内护套(2)外的各层，露出内护套(2)。从主线芯(1)端口向下，剥去导体绝缘层(1-2)，露出相应长度的导体(1-1)。将相应的热缩管(6)分别套在外护套(4)和3根主线芯(1)上。将3根主线芯(1)上分别压接固定相应的接线端子(7)。先热缩外护套(4)上的热缩管(6)，将其热缩呈开口向上的喇叭口状。外护套(4)上的热缩管(6)进行灌胶。热缩各主线芯(1)上的热缩管(6)。将主线芯(1)上的热缩管(6)向上套住接线端子(7)，然后从上向下热缩，将接线端子(7)的相应部位封闭。热缩管(6)下部留着开口形成开口向下的喇叭口状。主线芯(1)上的热缩管(6)进行灌胶。胶水固化后，将外护套(4)上的热缩管(6)的开口进行热缩收口。将各主线芯(1)上的热缩管(6)的开口进行热缩收口。

Description

耐高温电缆接头密封工艺 技术领域
本发明涉及电力电缆技术领域，具体是一种耐高温电缆接头密封工艺。
背景技术
在船用电力电缆中，很多情况下穿舱电缆在舱内接线时其接线端头处于开放状态，如遇事故，电缆本身容易损伤造成泄漏，其次饱和水蒸气和其它有害气体极易通过该端头部位进入电缆各个结构层的内部间隙，并沿电缆纵向向外扩散排放，成为泄露源，从而破坏舱室的安全边界。为此，不仅要求电缆本身具有较好的耐高温性能，而且需要对穿舱电缆的端头进行密封处理，提高使用的安全性。
发明内容
本发明的目的是提供一种安全可靠的用于耐高温电缆的接头密封工艺。
实现本发明目的的基本技术方案是：一种耐高温电缆接头密封工艺，包括以下步骤：
步骤一：固定并清洁电缆外表面。
步骤二：剥出内护套外的各层，露出内护套。
步骤三：从主线芯端口向下，剥去导体绝缘层，露出相应长度的导体。
步骤四：将相应的热缩管分别套在外护套和3根主线芯上。
步骤五：将3根主线芯上分别压接固定相应的接线端子。
步骤六：先热缩外护套上的热缩管，将其热缩呈开口向上的喇叭口状。
步骤七：外护套上的热缩管进行灌胶。
步骤八：热缩各主线芯上的热缩管。将主线芯上的热缩管向上套住接线端子，然后从上向下热缩，将接线端子的相应部位封闭。热缩管下部留着开口形成开口向下的喇叭口状。
步骤九：主线芯上的热缩管进行灌胶。
步骤十：胶水固化后，将外护套上的热缩管的开口进行热缩收口。将各主线芯上的热缩管的开口进行热缩收口。
为了便于操作和灌胶，所述步骤一中包括以下步骤，
步骤1.1用夹具10将电缆一端竖直向上固定，夹具固定位置以上预留不少于400mm的电缆。
步骤1.2用酒精擦拭清洁电缆外表面。
为了确保外护套和内护套之间的密封效果，所述步骤二中包括以下步骤，
步骤2.1在距离电缆端头300mm处进行标记，用美工刀切割电缆外护套，剥掉外护套。
步骤2.2剥开第三内衬层，在外护套断口处切断第三内衬层。
步骤2.3反向拆解电缆编织屏蔽层至外护套断口处，然后向下分条绑扎在外护套上。
步骤2.4美工刀在外护套断口处环切第一内衬层，然后剥掉第一内衬层。
步骤2.5在外护套断口处切断根填充条。
进一步的，所述步骤四中，将拆解开的编织屏蔽层的各条重新扭绕呈一根小辫与主线芯一起顺放。
为了便于灌胶，所述步骤六中包括以下步骤，
步骤6.1从外护套断口处往下测量100mm,用PVC胶带在电缆外护套上做标记，PVC胶带的下侧距外护套的断口处100mm。然后使热缩管的下口与PVC胶带下侧平齐，从下往上进行热缩，套在外护套上的热缩管的下部有20mm左右已经缩好，即停止热缩，上部留着开口形成开口向上喇叭口状，开口用于灌胶。
进一步的：所述步骤七中包括以下步骤，
步骤7.1将胶水充分搅拌，并进行静置，排空搅拌中可能引入的气体。
步骤7.2用针管将胶水从外护套上的热缩管上端口缓慢注入热缩管中,注入的胶量距热缩管上口15mm。胶水从管子一侧不间断缓慢注入，让胶水把热缩管内空气全部排净。
步骤7.3室温静置24小时，待胶水固化。
为了便于灌胶，所述步骤九中包括以下步骤，
步骤9.1将各主线芯的上端头向下弯折，使主线芯上的热缩管的开口朝上，用针管将胶水从热缩管的开口缓慢注入热缩管中,注入的胶量距热缩管上口10mm。胶水从管子一侧不间断缓慢注入，让胶水把热缩管内空气全部排净。
步骤9.2室温静置24小时，待胶水固化。
本发明具有以下的有益效果：(1)本发明的耐高温电缆接头密封工艺操作方便，能有效防止饱和水蒸气和其它有害气体从电缆的各个结构层之间向外扩散，使用安全性大大提高。(2)为了便于操作和灌胶，将电缆一端竖直向上固定，灌胶时确保重力 作用下将热缩管内空气全部排净。(3)步骤二中，保留编织屏蔽层，将其余位于内护套和外护套之间的各结构层切除，灌胶后能将切断处全部覆盖，编织屏蔽层被包覆在胶水中，从而彻底阻断内护套和外护套之间的各结构层的连通，编织屏蔽层采用编“小辫”的工艺方式，是更有利于灌胶密封及接地。(4)热缩管两端热缩后形成梭子形，将内部的胶固定牢固，密封性好。(5)本发明的热缩管内壁涂胶，具有耐高温高压性能，并且更容易与双组份环氧类胶水CC01融合在一起，对端头密封起到促进作用。(6)本发明的主线芯的导体采用压接密闭式端子工艺，可以有效的保证电气和机械连接。
附图说明
图1为本发明的电缆的结构示意图。
图2为电缆端头安装固定装置后的示意图。
图3为剥去内护套的各外层后的示意图。
图4为剥去电缆线芯的外层后的示意图。
图5为剥去各线芯的外层后露出导体的示意图。
图6为编制屏蔽层的处理示意图。
图7为外护套和主线芯套上热缩管时的示意图。
图8为安装接线铜端子后的示意图。
图9为处理外护套上热缩管下端后的示意图。
图10为外护套上热缩管灌胶的示意图。
图11为主线芯上热缩管一端热缩处理后的示意图。
图12为主线芯上热缩管灌胶的示意图。
图13为热缩管的另一端热缩后的示意图。
附图中的标号为：
主线芯1，导体1-1，导体绝缘层1-2，
内护套2，
内衬层3，第一内衬层3-1，第二内衬层3-2，第三内衬层3-3，
外护套4，
填充条5，热缩管6，
接线端子7。
具体实施方式
为了使本发明的内容更容易被清楚地理解，下面根据具体实施例并结合附图，对本发明作进一步详细的说明。本发明的方位的描述按照图1所示的方位进行，即图1所示的前后左右方向即为描述的径向，上下方向为轴向。需要理解的是，术语“上”、“下”、“内”、“外”等指示方位或位置关系是基于附图所述的位置关系，仅是为了便于描述本发明或简化描述，而不是指示必须具有的特定的方位。
(实施例1)
见图1至图13，一种耐高温电缆接头密封工艺，包括以下步骤：
所述耐高温电缆包括主线芯1、内护套2、内衬层3、外护套4和填充条5。主线芯1有3根，3根主线芯1的结构相同。3根主线芯1均沿其各自径向由内向外依次设有导体1-1和导体绝缘层1-2。导体绝缘层1-2包覆在导体1-1的外部。填充条5有3根。3根主线芯1和3根填充条5绞合成缆，成缆后挤包内护套2。内衬层3包括第一内衬层3-1和第二内衬层3-2。无机纤维带绕包在内护套2外形成第一内衬层3-1，绕包搭盖率40％至50％。第二内衬层3-2采用镀锡铜丝编织在第一内衬层3-1外形成编织屏蔽层，其编织覆盖率为88％至90％。无机纤维带绕包在第二内衬层3-2外形成第三内衬层3-3，绕包搭盖率40％至50％。外护套4挤包在第三内衬层3-3的外部。
步骤一：见图2，固定并清洁电缆外表面。
步骤1.1用夹具10将电缆一端竖直向上固定，夹具固定位置以上预留一段距离d1的电缆，所述距离d1不少于400mm。
步骤1.2固定好电缆后用酒精擦拭清洁电缆外护套的外表面。
步骤二：见图3和图4，剥出内护套外的各层，露出内护套。
步骤2.1在距离电缆端头一段距离d2处进行标记，所述距离d2不少于300mm，用美工刀切割电缆外护套4，剥掉外护套4。
步骤2.2剥开第三内衬层3-3，在外护套4断口处切断第三内衬层3-3。
步骤2.3反向拆解电缆编织屏蔽层至外护套4断口处，然后向下分条绑扎在外护套4上。
步骤2.4美工刀在外护套4断口处环切第一内衬层3-1，然后剥掉第一内衬层3-1。
步骤2.5在外护套4断口处切断3根填充条5。切割第一内衬层3-1和填充条5的时候不能损伤主线芯1。
步骤三：见图5，从主线芯2端口向下，剥去35mm的导体绝缘层1-2，露出相应长度的导体1-1。剥除导体绝缘层1-2是不要损伤导体1-1。
步骤四：见图6和图7，将拆解开的编织屏蔽层的各条重新扭绕呈一根小辫与主线芯1一起顺放。将相应的热缩管6分别套在外护套4和3根主线芯1上，所述热缩管6的内壁涂热熔胶，所述热熔胶是一种可塑性的高粘合剂，在加热的状态下可以完全与胶水粘合在一起，形成紧密的密封膜。
步骤五：见图8，将3根主线芯1的导体1-1端头上用液压钳通过压接密闭式端子工艺分别压接相应的接线端子7，形成电连接。
步骤六：见图9，先热缩外护套4上的热缩管6，将其热缩呈开口向上的喇叭口状。
步骤6.1从外护套4断口处往下测量100mm,用PVC胶带在电缆外护套4上做标记，PVC胶带的下侧距外护套4的断口处100mm。然后使热缩管6的下口与PVC胶带下侧平齐(也即热缩管6下端套在PVC胶带外)，从下往上进行热缩，套在外护套4上的热缩管6的下部有20mm左右已经缩好，即停止热缩，上部留着开口形成开口向上喇叭口状，开口用于灌胶。
步骤七：见图10，外护套4上的热缩管6进行灌胶。
步骤7.1将胶水充分搅拌，并进行静置，排空搅拌中可能引入的气体，本实施例采用双组份环氧类胶水CC01。
步骤7.2用针管将胶水从外护套4上的热缩管6上端口缓慢注入热缩管6中,注入的胶量距热缩管6上口15mm左右即可。胶水从管子一侧不间断缓慢注入，让胶水把热缩管6内空气全部排净，胶水与热缩管6的内壁的热熔胶粘合。
步骤7.3室温静置24小时，待胶水固化。
步骤八：见图11，热缩各主线芯1上的热缩管6。将主线芯1上的热缩管6向上套住接线端子7，然后从上向下热缩10mm左右，将接线端子7的相应部位封闭。热缩管6下部留着开口形成开口向下的喇叭口状。
步骤九：见图12，主线芯1上的热缩管6进行灌胶。
步骤9.1将各主线芯1的上端头向下弯折，使主线芯1上的热缩管6的开口朝上，用针管将步骤八所述的胶水从热缩管6的开口缓慢注入热缩管6中,注入的胶量距热缩管6上口10mm左右即可。胶水从管子一侧不间断缓慢注入，让胶水把热缩管6内空气全部排净，胶水与热缩管6的内壁的热熔胶粘合。
步骤9.2室温静置24小时，待胶水固化。
步骤十：见图13，胶水固化后，将外护套4上的热缩管6的开口进行热缩收口。将各主线芯1上的热缩管6的开口进行热缩收口。
本发明的耐高温电缆接头密封工艺将各层进行相应的处理，从而将端头完全密封，有效的防止高温高压气体沿电缆纵向扩散。
以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (7)

  1. 一种耐高温电缆接头密封工艺，其特征在于，包括以下步骤：
    步骤一：固定并清洁电缆外表面；
    步骤二：剥出内护套外的各层，露出内护套；
    步骤三：从主线芯端口向下，剥去导体绝缘层，露出相应长度的导体；
    步骤四：将相应的热缩管分别套在外护套和3根主线芯上；
    步骤五：将3根主线芯上分别压接固定相应的接线端子；
    步骤六：先热缩外护套上的热缩管，将其热缩呈开口向上的喇叭口状；
    步骤七：外护套上的热缩管进行灌胶；
    步骤八：热缩各主线芯上的热缩管；将主线芯上的热缩管向上套住接线端子，然后从上向下热缩，将接线端子的相应部位封闭；热缩管下部留着开口形成开口向下的喇叭口状；
    步骤九：主线芯上的热缩管进行灌胶；
    步骤十：胶水固化后，将外护套上的热缩管的开口进行热缩收口；将各主线芯上的热缩管的开口进行热缩收口。
  2. 根据权利要求1所述的耐高温电缆接头密封工艺，其特征在于：所述步骤一中包括以下步骤，
    步骤1.1用夹具10将电缆一端竖直向上固定，夹具固定位置以上预留不少于400mm的电缆；
    步骤1.2用酒精擦拭清洁电缆外表面。
  3. 根据权利要求1所述的耐高温电缆接头密封工艺，其特征在于：所述步骤二中包括以下步骤，
    步骤2.1在距离电缆端头300mm处进行标记，用美工刀切割电缆外护套，剥掉外护套；
    步骤2.2剥开第三内衬层，在外护套断口处切断第三内衬层；
    步骤2.3反向拆解电缆编织屏蔽层至外护套断口处，然后向下分条绑扎在外护套上；
    步骤2.4美工刀在外护套断口处环切第一内衬层，然后剥掉第一内衬层；
    步骤2.5在外护套断口处切断根填充条。
  4. 根据权利要求1所述的耐高温电缆接头密封工艺，其特征在于：所述步骤 四中，将拆解开的编织屏蔽层的各条重新扭绕呈一根小辫与主线芯一起顺放。
  5. 根据权利要求1所述的耐高温电缆接头密封工艺，其特征在于：所述步骤六中包括以下步骤，
    步骤6.1从外护套断口处往下测量100mm,用PVC胶带在电缆外护套上做标记，PVC胶带的下侧距外护套的断口处100mm；然后使热缩管的下口与PVC胶带下侧平齐，从下往上进行热缩，套在外护套上的热缩管的下部有20mm左右已经缩好，即停止热缩，上部留着开口形成开口向上喇叭口状，开口用于灌胶。
  6. 根据权利要求1所述的耐高温电缆接头密封工艺，其特征在于：所述步骤七中包括以下步骤，
    步骤7.1将胶水充分搅拌，并进行静置，排空搅拌中可能引入的气体；
    步骤7.2用针管将胶水从外护套上的热缩管上端口缓慢注入热缩管中,注入的胶量距热缩管上口15mm；胶水从管子一侧不间断缓慢注入，让胶水把热缩管内空气全部排净，待胶水固化。
  7. 根据权利要求1所述的耐高温电缆接头密封工艺，其特征在于：所述步骤九中包括以下步骤，
    步骤9.1将各主线芯的上端头向下弯折，使主线芯上的热缩管的开口朝上，用针管将胶水从热缩管的开口缓慢注入热缩管中,注入的胶量距热缩管上口10mm；胶水从管子一侧不间断缓慢注入，让胶水把热缩管内空气全部排净，待胶水固化。
PCT/CN2022/100013 2022-04-24 2022-06-21 耐高温电缆接头密封工艺 WO2023206753A1 (zh)

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