Improved Oil Filled Cable

Abstract

The invention relates to an improved oil-filled cable. The improved oil-filled cable includes an oil passage, a wire conduit, a shielding layer, an insulating layer and a protective cover from the inside to the outside; the oil passage is filled with insulating oil; the wire conduit It is formed by tightly twisting metal wires; an oil storage tank connected with the oil passage is also installed at the two ends of the oil-filled cable; the oil passage is made of a hard oil-immersed film, and the oil Throttle valves are equidistantly installed on the axis of the oil passage; each of the throttle valves includes two throttle plates perpendicular to the axis of the oil passage, and throttle holes are opened on each of the throttle plates; A throttling plug is movable between the throttling pieces; the cable can expand the assembly height difference of the oil-filled cable, increase the application space of the oil-filled cable, and can effectively prevent the generation of air gaps in the cable.

Description

technical field [0001] The invention relates to a cable, in particular to an oil-filled cable for power transmission. Background technique [0002] The shape of the cable is similar to a rope, and it is usually twisted by several or several groups of wires. Each group of wires is insulated from each other and is often twisted around a center. The entire outer surface is covered with a highly insulating coating; In the air or installed underground or underwater, it is used for telecommunications or power transmission; in order to ensure the normal and stable operation of the cable, the cable is often filled with insulating oil, which can effectively eliminate the air gap in the insulating layer due to load changes. In order to improve the working field strength of the cable; however, the traditional oil-filled cable needs to be equipped with supplementary impregnation equipment at the end, such as a pressure box, a gravity box, etc. This structure is connected with the oil ch...

AI Technical Summary

Problems solved by technology

[0002] The shape of the cable is similar to a rope, and it is usually twisted by several or several groups of wires. Each group of wires is insulated from each other and is often twisted around a center. The entire outer surface is covered with a highly insulating coating; In the air or installed underground or underwater, it is used for telecommunications or power transmission; in order to ensure the normal and stable operation of the cable, the cable is often filled with insulating oil, which can effectively eliminate the air gap in the insulating layer due to load changes. In order to improve the working field strength of the cable; however, the traditional oil-filled cable needs to be equipped with supplementary impregnation equipment at the end, such as a pressure box, a gravity box, etc. This structure is connected with the oil channel of the cable to store and compensate for the volume change of the cable. impregnating agent, and maintain a certain oil pressure; therefore, the operation of traditional oil-filled cables is more complicated during assembly, and there are many factors to be considered, which is inconvenient during installation and use; at the same time, in order to ensure the oil pressure in the cable Stable and uniform, the cable needs to limit a certain height difference when laying, that is, the height difference between the two ends of the cable should not be too large, so as to prevent the cable oil at the high position from being insufficient, so that the air gap will damage the circuit; due to the height difference The restriction of the oil-filled cable is greatly restricted when laying, which causes great inconvenience to the normal power transmission arrangement

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