Sectional type extensible insulating cylinder

Abstract

The invention discloses a sectional type extensible insulating cylinder, comprising three insulating cylinder pieces, which are a first insulating cylinder piece, a second insulating cylinder piece and a third insulating cylinder piece in turn according to inside diameters from small to large. Each insulating cylinder piece is a straight cylinder and the structure of each insulating cylinder piece comprises a cylinder wall and socket rings. An inner socket ring is horizontally arranged at the inner side of the upper portion of the cylinder wall of each of the first insulating cylinder piece, the second insulating cylinder piece and the third insulating cylinder piece; an outer socket ring is horizontally arranged at the outer end face of the lower portion of the cylinder wall of each of the second insulating cylinder piece and the third insulating cylinder piece, and the second insulating cylinder piece is placed on the outer socket ring of the first insulating cylinder piece via the inner socket ring. The inner socket ring of the first insulating cylinder piece is fixed at the place of an ascending base via an insulated fastener. The cylinder walls, the inner socket rings and the outer socket rings of the insulating cylinder pieces are formed by insulating materials. The insulating cylinder of the invention could be folded and stored, the insulating strength is improved, and the optimization of the design of a transformer is facilitated to reduce the cost.

Description

technical field [0001] The invention relates to the field of transformer manufacturing, in particular to a segmented stretchable insulating cylinder. Background technique [0002] Transformers are used for voltage conversion in power transmission and transformation projects. They work at high voltages. In order to facilitate wiring and maintenance, a riser is usually installed around the voltage equalizing ball part of the transformer, and an insulating layer is set between the voltage equalizing ball and the riser. Due to the high voltage generated at the equalizing ball, in order to improve the insulation strength of the equalizing ball of the oil-immersed transformer, it is necessary to install an insulating cylinder between the equalizing ball and the wall of the raised seat, and the height of the barrel is greater than that of the raised seat. High cleanliness requirements are required. If the insulating cylinder cannot be packaged with the rising seat due to its heig...

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Problems solved by technology

[0004] Patent Publication No. 203397871U discloses a telescopic insulating cylinder, which uses vertical stays for convex-concave wedge fit to socket two insulating cylinders so that the total length of the insulating cylinder can be changed, but this design Limited by the structure of the convex-concave wedge fit, the two sections of insulating cylinder must be matched with each other, and the replaceability of parts is poor. When one section of the insulating cylinder is damaged, it is difficult to find replaceable parts, and the upper part of the insulating cylinder with this structure The diameter of the lower part is still approximately equal, and it is not easy to cooperate with the optimal design of transformers such as increasing the arc radius of the pressure equalizing ball and reducing the diameter of the raised seat mentioned above.

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