With the rapid development of power cable buried laying project, the cable casing put forward higher requirements, fiberglass cable conduit is a high-strength glass fiber as a reinforcing material, not saturated polyester resin as the base material, using microcomputer control machinery winding and become. Cable protection sleeve has good corrosion resistance, long service life, can be used in damp and saline areas. Flame retardant, good heat resistance, can be used for a long time at a high temperature of 130 degrees without deformation, and does not burn in case of fire. High strength and rigidity. Used in the roadway under the direct burial without the need to add a protective layer of concrete, can roll fast cable project construction progress. Cable protection sleeve both pipe and fittings have a certain degree of flexibility, can withstand external heavy pressure and foundation settlement caused by the damage. Has good resistance to external signal interference performance.
Smooth inner wall, not easy to scratch the cable. The design adopts the socket type connection method, which is convenient for installation and connection. Joints plus rubber sealing ring seal both to adapt to thermal expansion and contraction, but also to prevent the entry of mud and sand. First of all, the heat shrinkable medium wall pipe emphasizes that the wall thickness is medium thickness, which is slightly thinner than the sheath pipe. Secondly, the coating of the heat shrinkable heat shrinkable tube in the wall of the hot melt adhesive used, 75 caliber straight coating, 75 caliber and above specifications using a spiral coating method, from the appearance of the difference looks very obvious, is a mechanical full coating of the product; while the sheath tube is usually handmade two ends of the coating of adhesive, but also can be coated with adhesive, coated with a layer of adhesive is a cold adhesive, waterproofing performance is not as good as the medium-wall sheath tube. Once again, due to the different ways of gluing, in general, heat shrinkable medium-wall tube to do the largest caliber is 200, and heat shrinkable sheath tube can be done to 300, mainly in the medium-wall tube of the large diameter spiral gluing equipment is more expensive. Furthermore, the two products are not the same polyethylene base material formula, the middle wall tube material is softer.