Water blocking power cable

Abstract

The invention discloses a water blocking power cable, comprising a cable core, wherein the cable core is formed by twisting a plurality of insulated water blocking cores; the gap of the cable core isfilled with a water blocking rope, a first semi-conductive water blocking tape is lapped after a copper strip shielding layer is arranged outside the cable core, then a first water blocking tape is lapped, a PVC inner sheath layer is extruded outside the first water blocking tape, a buffer water blocking tape is continuously lapped outside the PVC inner sheath layer and then a galvanized round steel wire armored layer is wound, a second water blocking tape is lapped outside the galvanized round steel wire armored layer, and an MDPE outer sheath is extruded outside the second water blocking tape. The water blocking power cable has very strong water blocking function, rainwater cannot enter the conductor, and the oxidation and corrosion of the conductor due to water infiltration are prevented from affecting the electrical performance of the cable and even causing cable breakage, so that the service life of the cable is greatly prolonged.

Description

technical field [0001] The invention relates to the field of cables, in particular to a water-blocking power cable. Background technique [0002] With the rapid growth of China's economy and the further acceleration of industrialization and urbanization, the requirements for the construction of infrastructure such as urban power grids are increasing. Cities in developed regions and provincial capitals have required the use of underground power cables to transmit electric energy in urban centers. At the same time, electricity is the premise and foundation of the development of the national economy. With the rapid development of the national economy, the demand for electricity has increased sharply, the capacity of the grid has increased sharply, and the power of motors has increased. ) transmission direction development. [0003] Moisture intrusion is often the main reason for power cables to be damaged and their service life affected. The way of water intrusion is mainly f...

AI Technical Summary

Problems solved by technology

The way of water intrusion is mainly from the sheath of the cable and the end of the cable into the inner conductor of the cable, causing oxidation and corrosion of the conductor, thereby affecting the electrical performance of the cable, and even causing abnormal disconnection accidents; Under the action of the electric field, the insulating layer will produce "water branches", which will accelerate the electrical aging of the cable, cause cable breakdown accidents, and reduce the service life of the cable

Images