CN2096807U

CN2096807U - Excitless plate shape shunting switch

Info

Publication number: CN2096807U
Application number: CN 91218384
Authority: CN
Inventors: 刘刚; 许志江
Original assignee: CHANGHONG ELECTRIC APPLIANCE FACTORY WUHAN CITY
Current assignee: CHANGHONG ELECTRIC APPLIANCE FACTORY WUHAN CITY
Priority date: 1991-07-15
Filing date: 1991-07-15
Publication date: 1992-02-19

Abstract

The utility model relates to a non-excitation plate-shaped shunting switch used for a three-phase oil-immersed power transformer, which is composed of a flanged disc, a rotating shaft, a switch base, etc. The utility model is characterized in that the switch base adopts a columnar individual structure; a partition plate and a plate-shaped baffle are arranged inside and outside the columnar individual structure; a contact portion is provided with a floating gasket with a floating self regulating function. In addition, the utility model also has an external sealing structure, and therefore, the utility model has the advantages of simple structure, small size, high voltage resistance, reliable operation, and easy maintenance.

Description

Excitless plate shape shunting switch

The utility model relates to a kind of excitation-free disk-shaped tapping switch that is used for the three-phase oil immersion power transformer, is the improvement to existing excitation-free disk-shaped tapping switch.

A kind of improved off circuit tap changer has been proposed in Chinese patent CN2062483U, this shunting switch is compared with the like product that generally uses at present, owing on switch pedestal, adopted the corresponding curved-surface structure of evagination indent, increased creepage distance, thereby the overall dimension of not only having dwindled this shunting switch, especially height dimension, and improved its withstand voltage properties, yet the switch pedestal of this product has adopted, following dish structure is in last dish is provided with, positive camber, following dish bottom has set firmly insulation boss and setting-in fixed contact, therefore its planform is comparatively complicated, in addition, adopts this structure, the shape of each insulating component of switch is also thicker, like this, make the pressing process variation of insulating component, to such an extent as to influence its insulation property.

Task of the present utility model is to avoid above-mentioned weak point and provides a kind of performance better excitation-free disk-shaped tapping switch, and not only overall dimension is little for it, and withstand voltage height, and features simple structure are easy to make.

Task of the present utility model is realized by following scheme: have a ring flange 12, be coated with rotating shaft 21 in the middle of the ring flange, the rotating shaft upper end is equipped with turning handle 14, the lower end then is fitted with movable contact spring 1, be connected with switch pedestal 4 in the lower end of ring flange 12, the lower end of switch pedestal is equipped with the fixed contact 26 that engages with movable contact spring 1, its main difference part is that switch pedestal 4 is the column individual construction, its middle part is provided with radially-protruding dish baffle 6, last, the unsteady packing ring 2 of a gear-like that is meshed with fixed contact 26 also is housed between the following movable contact spring, and the circumferential top and bottom projection of each tooth of packing ring that floats also is positioned among the two fixed contacts interval.

According to such scheme, primary structure characteristics of the present utility model are that switch pedestal 4 has adopted the column individual construction, and cancelled the insulation boss in the bottom of switch pedestal and replaced with unsteady packing ring 2, thereby total is simplified, manufacture craft has also obtained effective improvement thereupon, owing to be provided with dish baffle 6 at the middle part of switch pedestal, increased the creepage distance of shell, and make it in electric field, play effective discharge iris action, so that the withstand voltage of whole shunting switch is improved, and shortened its height dimension, in addition, adopt the packing ring 2 that floats, not only simplify the structure, avoid overlapping between the two-phase, increased the reliability of operating the position, and because its unsteady self-regulated effect can make operation more nimble, the feel of operation has also obtained enhancing.

Fig. 1 is the positive view of an embodiment of the utility model.

Fig. 2 operates the diagram of position for the utility model turning handle.

Fig. 3 is a upward view of the present utility model.

Fig. 4,5 front view and profile of tooth figure for the unsteady packing ring of the utility model, wherein Fig. 5 cuts open figure for C-C.

Embodiment of the present utility model such as Fig. 1,2,3,4, shown in 5, has a ring flange 12, be equipped with nut 18 on the ring flange cylindrical, trim ring 19 and sealing ring 20, constitute outer sealing device, because the sealing circle is arranged on the outside of transformer case 10, therefore very be convenient to maintain and replace, also be provided with the location notch 16 of three corresponding fixed contacts on the top of ring flange, the location that is used for turning handle 14, in the endoporus of ring flange, be coated with rotating shaft 21, top is provided with inner seal ring 17 and nut 15, turning handle 14 is equipped with by pin 13 in the upper end of rotating shaft 21, the lower semisection of rotating shaft is an insulator, has the obstruct shaft shoulder, the bottom is flat side's shape, matched with movable contact spring 1, the lower end of ring flange 12 and switch pedestal 4 link, side direction is provided with trip bolt 22, switch pedestal profile and inner chamber are column, be convenient to shape, be provided with radially-protruding dish baffle 6 at the middle part of switch pedestal, it has annular groove and is equipped with reinforcement 5, also be provided with locating groove 7 on it, so that with alignment pin 8 phase configuration on the transformer, inner chamber in switch pedestal is provided with central dividing plate 23, in order to constitute independent contact cavities 3, make and the utlity model has higher withstand voltage properties, movable contact spring 1 is housed in the contact cavities 3, on movable contact spring divides, following two, the middle flat hole and the hypomere phase configuration of rotating shaft 21, the next door is installed with the external compression device, the external compression device is made of bearing pin 24 and stage clip 25, be equipped with the unsteady packing ring 2 of the gear-like that is meshed with fixed contact 26 up and down between the movable contact spring, the tooth 29 circumferential top and bottom projectioies of unsteady packing ring, as shown in Figure 5, each tooth stretches among two intervals between the fixed contact 26, fixed contact 26 usefulness bolts 27 are fixed on the bottom of switch pedestal, in addition, bottom in switch pedestal also can be provided with oil clearance 28, its upper lateral part is provided with fuel feed hole 9, put in place for guaranteeing after movable contact spring 1 transposition to contact with fixed contact 26, avoid producing dislocation, turning handle falls and must enter location notch 16 behind the position, can't cover otherwise go up cover, sees shown in Figure 2, therefore, the utlity model has better operating reliability.

Claims

1, a kind of excitation-free disk-shaped tapping switch that is used for the three-phase oil immersion power transformer, has a ring flange 12, be coated with rotating shaft 21 in the middle of the ring flange, the rotating shaft upper end is equipped with turning handle 14, the lower end then is fitted with movable contact spring 1, be connected with switch pedestal 4 in the lower end of ring flange 12, the lower end of switch pedestal is equipped with the fixed contact 26 that engages with movable contact spring 1, it is characterized in that switch pedestal 4 is the column individual construction, its middle part is provided with radially-protruding dish baffle 6, last, the unsteady packing ring 2 of a gear-like that is meshed with fixed contact 26 also is housed between the following movable contact spring, and the circumferential top and bottom projection of each tooth of packing ring that floats also is positioned among the two fixed contacts interval.

2, by the described excitation-free disk-shaped tapping switch of claim 1, it is characterized in that being equipped with on the ring flange cylindrical nut 18, trim ring 19 and sealing ring 20, constitute outer sealing device.

3, by claim 1 or 2 described excitation-free disk-shaped tapping switch, it is characterized in that the inner chamber of switch pedestal 4 is provided with central dividing plate 23, in order to constitute independent contact cavities 3.

4, by claim 1 or 2 described excitation-free disk-shaped tapping switch, it is characterized in that the top of switch pedestal 4 is provided with locating groove 7.

5, by claim 1 or 2 described excitation-free disk-shaped tapping switch, it is characterized in that the top at ring flange 12 also is provided with the location notch 16 of three corresponding fixed contacts.