Lightweight threading sheath tube

The utility model discloses a light threading sheath tube which comprises a cylindrical tube body and is characterized in that the tube wall of the tube body is composed of an outer skin layer, a middle layer and an inner skin layer, the inner side face of the outer skin layer is tightly attached to the outer side face of the middle layer, and the inner side face of the middle layer is tightly attached to the outer side face of the inner skin layer; the outer skin layer and the inner skin layer are hard layers, and the middle layer is a PVC foaming layer. According to the light threading protective sleeve, the cost of raw materials and the overall weight can be effectively reduced under the condition that the strength of the sleeve wall is guaranteed. 本实用新型公开了一种轻质穿线护套管，包括筒状的管体，其特征在于：所述管体的管壁由外皮层、中间层和内皮层构成，外皮层的内侧面与中间层的外侧面紧密贴合在一起，中间层的内侧面与内皮层的外侧面紧密贴合在一起；外皮层和内皮层为硬质层，中间层为PVC发泡层。这种轻质穿线护套管能够在保证管壁强度的情况下，有效降低原材料成本和整体重量。