Modern ships are used in harsh environments for a long time, and the quality of the various electrical equipment on the ship is directly affected, which directly affects the reliable use of the equipment. The heat shrinkable sleeve process on the ship not only waterproofs, prevents steam, salt and other corrosion, but also eliminates stress, has excellent insulation, wear resistance and stress relief performance, and overcomes the commonly used DMT-J2. The plug-type sealing packing has poor detachability and poor forming effect of DFD-I type soft blocking material, and is easy to sag and sticky.

In order to ensure the successful application of the heat shrinkable sleeve process on the ship, it is necessary to carefully control the selection of the heat shrinkable sleeve, the handling of the cable heat shrinkable sleeve during construction, the heat shrinkable packaging of several typical joints, and the heating forming. To ensure the quality of construction.

The diameter of the heat-shrinkable sleeve should be selected according to the diameter of the cable, the filler culvert or the special plug and socket. The materials with different shrinkage ratios are generally selected, and the materials of 2.5, 1 and 3:1 are generally selected. The basic principle is that the diameter of the heat shrinkable tube before heating is greater than the diameter of the cable, and the minimum diameter that can be achieved after heating must be smaller than the diameter of the cable.

The diameter of the heat shrinkable sleeve cannot be selected too large or too small, otherwise the sealing and reinforcement effect cannot be achieved. When selecting the casing, pay attention to both thin and thick. Generally, when the heat shrinkable sleeve is installed on the cable root, the cable core branch port, the special plug, and the single filler culvert, the thick type can be selected; the whole core wire, the core wire terminal, or the special plug and socket can be installed. Thin tubing is available for the inner core wire and the connector (welding pin, pin).

The heat shrinkable sleeve will only shrink and fasten to the joint when heated to a certain temperature. When heating with a hot air gun, it must be uniformly heated around the circle. The distance is generally controlled at 30~50mm, and the heating temperature is controlled at 120~130°C. The hot air gun air outlet should not be too close to the material to be heated, otherwise the material will be burnt due to excessive temperature or local high temperature. Under normal operating conditions, when the casing is evenly and tightly wrapped around the cable, special plug, socket or filler culvert, the surface of the casing is smooth and bright, indicating that the heating shrinkage is completed. If the heat-shrinkable pipe has a hot-melt adhesive or a sealant for sealing, it is preferable to have a small amount of glue on the two ports when heating.

KeHong Enterprises Co.,Ltd.

E -mail：gavin@gzhelectric.com

Tel:+86-20-82586869, Mobile: +8615918777767

Wechat:008615918777767

Skype:gonggulily

热缩套管在舰船上的应用

现代舰船长时间在恶劣环境下使用,舰艇上各种电气设备进接线质量如何,直接影响到设备的可靠使用。在舰船上采用热缩套管工艺,不仅能防水、防汽、防盐和防其他腐蚀,而且能消除应力,具有优良的绝缘、耐磨损和应力消除性能,克服了常用的DMT一J2嵌塞式密封填料可拆性差和DFD一I型软性堵料成型效果差,易流挂、发粘的弊病。

为了保证热缩套管工艺在舰船上成功应用,必须对热缩套管的选用,施工中电缆热缩套管的处理,几种典型接头的热缩封装,加热成型等环节加以认真控制,以保证施工质量。

热缩套管的直径要根据电缆、填料涵或专用插头插座直径大小,分别选取不同缩比的材料,一般可选用2.5,1和3:1缩比的材料。其基本原则是:热缩管加热前的直径要大于电缆直径,而加热后可达到的最小直径必须小于电缆直径。

热缩套管直径不能选得过大或过小,否则无法达到密封和加固的效果。在选用套管时还应注意薄型、厚型两种情况。一般地,当热缩套管安装在电缆根部、电缆芯线分支口、专用插头、单个填料涵上时,可选用厚型;安装在整段芯线、芯线端子头,或专用插头、插座内芯线与接插件上(焊针、插针)时,可选用薄型管材。

热缩套管只有在加热到一定温度时才会收缩紧固于接头部位。用热风枪加热时,必须环圆均匀加热,距离一般控制在30~50mm为宜,加热温度控制在120~130℃。热风枪出风口不能太靠近被加热材料,否则,因温度过高或局部高温而使材料烧焦。在正常操作施工情况下,当套管均匀紧密地包裹在电缆、专用插头、插座或填料涵上,其表面呈现出平滑光亮状时,表明加热收缩完毕。如热缩管材内带有密封用的热熔胶或密封胶,则加热时以两端口有少许胶舌溢出为宜。