CN2332046Y

CN2332046Y - Disk-type no-excitation shunting switch

Info

Publication number: CN2332046Y
Application number: CN 98238249
Authority: CN
Inventors: 蔡长福
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-07-15
Filing date: 1998-07-15
Publication date: 1999-08-04
Anticipated expiration: 2008-07-15

Abstract

The utility model relates to a disk-shaped tap switch without excitation, which is used for regulating voltage in transformers. The utility model mainly comprises a handle, a rotary shaft, a base, a holder, a sealing loop arranged on the position of the rotary shaft, and a movable contact which is arranged under the rotary shaft and can be connected with a plurality of static contacts fixed on the holder separately. The utility model is characterized in that the sealing hoop on the position of the rotary shaft is an integral sealing hoop whose inner wall is provided with two or three annular dummy clubs to enlarge compression amount and increase sealing performance; a transition convex-concave step is adopted to be arranged between the base and the holder, an oil gap is additionally arranged, and the interphase electric strength of the utility model is increased.

Description

The dish-type off circuit tap changer

The utility model relates to a kind of transformer Regulation Control device, particularly a kind of dish-type off circuit tap changer.

The dish-type off circuit tap changer of extensive use at present mainly comprise base and the bearing that links to each other with base and be located at the rotating shaft bottom can be connected in a plurality of moving contacts of deciding the contact tap on the bearing.When the rotating shaft upper handle, rotating shaft and moving contact together rotate, and moving contact is communicated with each tap of deciding contact respectively, play the number of turn of adjusting transformer coil, change the no-load voltage ratio of transformer, thereby reach the purpose of adjusting voltage.The deficiency of its existence is: the hermetically-sealed construction of rotating shaft place is a plurality of zero superimposed type O-ring seals, in use, and the easy mutual extrusion of a plurality of O-ring seals, wearing and tearing cause decrement to reduce, and it is unreliable to seal, make transformer oil from rotating shaft to external leakage, influence operate as normal.In addition, the insulation that base and bearing are alternate, be utilize base with the bearing (three bearings) that is spaced apart of boss.This phase insulation structure, insulating barrier is blocked up, and in the whole course of processing, temperature retention time is longer, both wasted energy, prolonged the production cycle again, because insulating barrier is blocked up, density reduces relatively, electrical strength is reduced, insulation effect is relatively poor, owing to be three bearings, the installation of itself and base is also more bothersome.

At the deficiency that above-mentioned prior art exists, the purpose of this utility model provides a kind of sealing property height, dish-type off circuit tap changer that insulation effect is good, easy for installation.

The purpose of this utility model is achieved in that it comprises base and the bearing that links to each other with base and the rotating shaft that places base, this rotating shaft bottom be connected with can be connected in a plurality of moving contacts of deciding the contact tap on the bearing, the top of rotating shaft is provided with handle, it is characterized in that: rotating shaft place is provided with an integral sealing cushion rubber, the inwall of this cushion rubber has two roads or three road annular boss, the bearing that links to each other with base is an integral body, alternate at base and bearing, base has groove, bearing that should groove is had boss, and be provided with oil clearance below this boss.

The utility model has the advantages that: the integral sealing circle that has twice or three road annular boss at the inwall of rotating shaft place setting, increased decrement, sealing property is improved greatly, at the alternate transition convex-concave step that designed of base with bearing, and set up oil clearance, make it to have improved greatly alternate electrical strength, and intrinsic three bearings are made up as a whole bearing, brought convenience to installation.

Below in conjunction with accompanying drawing the utility model is explained.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that K among Fig. 1 is to view.

Fig. 3 is that A among Fig. 1 is to view.

Fig. 4 is a rotating shaft place ring structure schematic diagram.

With reference to the accompanying drawings, the utility model mainly by cover 1, handle 2, rotating shaft 3, nut 4, integral sealing circle 5, press Fig. 6, zero RunddichtringO 7, base 8, rivet 9, decide contact 10 and (whenever be 3 mutually, be 9 altogether), spring 11, moving contact 12 (1 of every phase), bearing 13 constitute.Bearing is one whole to be connected with base, decide contact 10 and be placed on the bearing 13, every phase moving contact be connected rotating shaft below, together rotate with rotating shaft, integral sealing circle 5 its inwalls of rotating shaft place have two road annular boss 5-1.The alternate employing transition convex-concave step of base 8 and bearing 13 replaces former phase insulation structure, promptly at the alternate groove 8-1 that is provided with of base 8, bearing that should groove is had boss 13-1, be provided with oil clearance 13-2 below this boss, the uiform section that utilizes the alternate boss of bearing is as insulating barrier, make it when improving alternate electrical strength, for processing and fabricating has brought convenience.

Claims

1, a kind of dish-type off circuit tap changer that is used for the transformer pressure regulation, it comprises base and the bearing that links to each other with base and the rotating shaft that places base, this rotating shaft bottom be connected with can be connected in a plurality of moving contacts of deciding the contact tap on the bearing, the top of rotating shaft is provided with handle, it is characterized in that: rotating shaft place is provided with an integral sealing cushion rubber, the inwall of this cushion rubber has two roads or three road annular boss, the bearing that links to each other with base is an integral body, alternate at base and bearing, base has groove, bearing that should groove is had boss, and be provided with oil clearance below this boss.