专注通风管道加工·排烟罩

　　The joint repair of heat preservation spiral steel pipe plays an important role in the construction acceptance, so the joint repair must be in accordance with the specification, and the spiral steel pipe joint shall be confirmed to be qualified through X-ray flaw detection, and the sundries at the joint and the joint repair sheath shall be cleaned. Measure the length of the joint to be patched. The length is generally less than or equal to 50cm. Wrap the leather sheath around the joint to make the length of the joint at both ends uniform.

　　用宽150mm的热缩带把搭接处缠绕一周，用小火依次将搭接的两层热缩带烘烤胶层微化并搭接固定住，再将胶层已烘烤过的压盖居中扣在搭接缝上，然后用中火来回均匀烘烤压盖直压盖与热缩带完全粘接无翘边和气泡，加热过程中可用手套或压滚抚平压盖使其与热缩带紧密粘接。

　　Wrap the lap joint with a 150 mm wide heat shrinkable tape for one week, bake the two layers of heat shrinkable tape with a small fire in turn until the adhesive layer is slightly modified and fixed, then buckle the baked gland of the adhesive layer on the lap joint in the middle, bake the gland evenly back and forth with a medium fire until the gland and the heat shrinkable tape are completely bonded without warping and bubbles, and use gloves or rolling to smooth the gland during heating Heat shrinkable tape is tightly bonded.

　　压盖压紧后，从热缩带的中部开始，烘烤与套管搭接的一边，烘烤时应从底部开始，并遵循由下向上、由里向外的烘烤规则，以避免气泡产生；

　　After pressing the gland, bake the overlapping side of the sleeve from the middle of the heat shrinkable belt, starting from the bottom and following the baking rules from bottom to top and from inside to outside to avoid bubbles;

　　调整喷火焰长度，先沿热缩带中部环向均匀加热，中间收缩完后再依次加热两端，加热过程中喷应来回移动以保证热缩带不局部过热。加热收缩时应仔细观察热缩带边沿是否有热熔胶溢出。待收缩完毕后，再次检查热缩带和压盖是否有翘边和气泡存在，若有应及时修补排除气泡保证热缩带和压盖平整。

　　Adjust the length of the flame, heat uniformly along the central ring direction of the heat shrinkable belt first, and then heat the two ends successively after the middle shrinkable. During the heating process, the spray shall move back and forth to ensure that the heat shrinkable belt does not overheat locally. When heating and shrinking, carefully observe whether the edge of the heat shrinkable belt overflows with hot melt adhesive. After the contraction, check whether there is edge warping and bubble in the heat shrinkable belt and gland again. If there is, repair and remove the bubble in time to ensure that the heat shrinkable belt and gland are flat.

　　确定热缩带密封后，把黑白料按照1混合在容器中，迅速倒入保温口中，然后封住口。直埋保温管现场补口有哪些方法？

　　After confirming that the heat shrinkable tape is sealed, mix the black and white materials into the container according to 1, quickly pour them into the insulation mouth, and then seal the mouth. What are the methods for field joint repair of directly buried insulation pipe?

　　确定热缩带与热缩套的搭接长度。截取热缩带的长度 。热缩带的一端裁去倒角×mm。

　　Determine the lap length of heat shrinkable tape and heat shrinkable sleeve. Cut off the length of the shrink zone. One end of the heat shrinkable tape shall be chamfered × mm.

　　将热缩带胶层向内包覆在接口处，并保证热缩带在搭接处居中位置 。先用小火依次将搭接的两层热缩带烘烤胶层微化并搭接固定住，再将胶层已烘烤过的压盖居中扣在搭接缝上。

　　Wrap the adhesive layer of heat shrinkable tape inwards at the joint, and ensure that the heat shrinkable tape is in the middle of the lap joint. First, bake the two layers of heat shrinkable tape with low heat to the glue layer micromation and fix the overlap, then buckle the baked gland of the glue layer on the lap joint.