Drum type non-excitation tapping switch with modularization assembling structural form

Abstract

The invention discloses a drum type non-excitation tapping switch with a modularization assembling structural form. The switch comprises an insulating cylinder and an electrical element that is installed on the cylinder wall of the insulating cylinder. And the switch is characterized in that: the insulating cylinder is formed by a plurality of insulating arc plates and connection support plates, wherein the plurality of insulating arc plates are equally divided according to graduations of switch shifts and the connection support plates are used for connecting the plurality of insulating arc plates; the plurality of insulating arc plates are spliced into the insulating cylinder by the connection support plates; and a plurality of holes that are used for installing static contacts and lines are opened and arranged on all the insulating arc plates. According to the invention, an original insulating cylinder that is wound by epoxy glass fibers is changed into an insulating cylinder that is formed by a plurality of insulating arc plates in a splicing mode, wherein the plurality of insulating arc plates are processed by compression molding; and various holes that are opened on the insulating arc plates and are used for installing an electrical element can be formed by one-time hot pressing and thus it is no need to employ a machine tool for processing; therefore, processing time and cutter costs are saved; labor productivity is improved and production costs are reduced.

Description

Technical field: [0001] The invention relates to the field of off-excitation tap-changers, in particular to a drum-type off-excitation tap-changer in the form of a modular assembly structure. Background technique: [0002] Drum type non-excitation tap-changer due to the limitation of radial size, the switch body and wiring pile head are installed in a cylindrical insulating barrel, the shape looks like a long drum, so it is called drum type non-excitation tap changer tap changer. [0003] Depend on figure 1 It can be seen that the drum-shaped insulating cylinder 10 of the drum-type off-excitation tap-changer is usually wound into a barrel shape of a composite material by epoxy glass filaments, and various holes required in the barrel shape—through holes 11, blind holes 12, rectangular holes 13, etc. Then it is processed by machine tools. Due to the many types and large quantities of holes processed, the processing is labor-intensive and time-consuming, and a little careles...

AI Technical Summary

Problems solved by technology

[0003] Depend on figure 1 It can be seen that the drum-shaped insulating cylinder 10 of the drum-type off-excitation tap-changer is usually wound into a barrel shape of a composite material by epoxy glass filaments, and various holes required in the barrel shape—through holes 11, blind holes 12, rectangular holes 13, etc. Then it is processed by machine tools. Due to the many types and large quantities of holes processed, the processing is labor-intensive and time-consuming, and a little carelessness will result in processing waste.

Moreover, the processing of the insulating cylinder containing glass filaments has high requirements on the cutting tools, and the service life of the processing cutting tools is very short.

[0004] In addition, the cylinder body of the insulation cylinder 10 is thin and long, which causes difficulties in the installation of electrical components such as contacts and wiring in the insulation cylinder 10. For this reason, some large mounting holes need to be processed on the cylinder body of the insulation cylinder 10. Process holes 14, and these large installation process holes 14 cause the strength of the insulating cylinder 10 to decrease on the one hand, and on the other hand easily cause the electric field inside the insulating cylinder 10 to leak

For this, see figure 2 , the current practice is to install the electrical components in the insulating cylinder 10, such as contacts and wiring, on the periphery of the insulating cylinder 10, using some short cylinders or arcs 20 of various prescribed shapes to install these The large holes in the process are covered, which further increases the manufacturing cost of the switch

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