CN208225737U - A kind of no excitation disk neutral-point voltage-regulating tap switch - Google Patents

Abstract

The utility model discloses a kind of no excitation disk neutral-point voltage-regulating tap switchs, including switch base and the shaft being threaded on switch base, shaft upper end attended operation positioning device, install clip type moving contact in the lower end of shaft, the clip type moving contact it is upper, lower moving contact be installed in the column static contact phase configuration circumferentially laid below switch base, the group number of the static contact is corresponding with the number of moving contact, in every group of static contact, setting insulation boss between adjacent static contact, clip type auxiliary contact is equipped in the radial outside of clip type moving contact, the clip type auxiliary contact is used for when switching shift and insulation boss phase configuration.When switching shift, moving contact is lifted with auxiliary contact, when arriving another gear, insulation boss is skidded off with auxiliary contact, falls into the contact point of static contact, combines the contact of dynamic/static contact, reduce the friction between dynamic/static contact in this way, further improves mechanical life and the contact performance of dynamic/static contact.

Description

A kind of no excitation disk neutral-point voltage-regulating tap switch

Technical field

The utility model relates to a kind of tap switch, in particular to a kind of no excitation disk neutral-point voltage-regulating tap switch.

Background technique

It is to disclose a kind of off circuit tap changer in CN202650815U in patent publication No. comprising the dynamic touching of clip type Head, the clip type moving contact and column static contact phase configuration, when switching shift, clip type moving contact directly rubs with static contact It wipes, the overlay coating being easily damaged between dynamic/static contact, to influence the service life and contact performance of each contact.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of energy in view of the deficiency of the prior art Improve service life and contact a kind of reliable no excitation disk neutral-point voltage-regulating tap switch.

The technology employed by the present utility model is a kind of no excitation disk neutral-point voltage-regulating tap switch, including open The dynamic touching of clip type is installed in the shaft closing seat and being threaded on switch base, shaft upper end attended operation positioning device, the lower end of shaft Head, the upper and lower moving contact of the clip type moving contact be installed in the column static contact phase configuration circumferentially laid below switch base, The group number of the static contact is corresponding with the number of moving contact, in every group of static contact, setting insulation boss between adjacent static contact, It is characterized by: the radial outside in clip type moving contact is equipped with clip type auxiliary contact, the thickness of the insulation boss is greater than Upper and lower spacing of the auxiliary contact at operating position, the clip type auxiliary contact is used for when switching shift and insulation boss Phase configuration.

According to the above technical scheme, the both ends of the moving contact are in the curved of evagination, and centre is the curved of indent, intermediate It smoothly transits and connect with both ends, the difference in height of the outer salient point at both ends and intermediate interior concave point forms an overtravel.

According to the above technical scheme, the clip type auxiliary contact includes upper and lower auxiliary contact, the upper and lower auxiliary contact For the curved of evagination, the upper auxiliary contact correspondence is connected with upper moving contact, the lower auxiliary contact correspondence and lower dynamic touching Head is connected.

According to the above technical scheme, the arcuate surface of the upper and lower auxiliary contact and insulation boss are located on same circumference.

According to the above technical scheme, the static contact be column, the static contact include static contact ontology and with static contact sheet The connected connecting terminal of body, the static contact ontology protrude into switch base inner cavity, and connecting terminal is stretched out outside switch base and bent downward, The outer diameter of the static contact ontology is less than the outer diameter of connecting terminal.

According to the above technical scheme, the static contact ontology is connected with connecting terminal by gradual transition section.

According to the above technical scheme, the static contact ontology is cylindric or flat column.

Have the beneficial effect that the utility model passes through setting auxiliary contact and insulation boss acquired by the utility model, When switch shift, moving contact is lifted with auxiliary contact, when arriving another gear, is skidded off insulation boss with auxiliary contact, is fallen into quiet The contact point of contact combines the contact of dynamic/static contact, reduces the friction between dynamic/static contact in this way, further improves operation Feel improves mechanical life and the contact performance of dynamic/static contact；The outer salient point at the moving contact both ends and intermediate interior concave point Difference in height formed an overtravel, when switch shift when, moving contact rotate when, the setting of overtravel increases rotating torque, It is engaged again after to another gear, increases an operating handle with positioning to shift in this way, while moving contact is in spring masterpiece Enable moving contact automatic homing to center position under, improves positioning accuracy and contact performance；Outside the static contact ontology The outer diameter that diameter is less than connecting terminal further improves insulation so that oil clearance distance of the adjacent static contact in insulating base becomes larger Level can also further reduce switch outer diameter, so that switch is occupied inside transformer space and become smaller, it is small-sized to be conducive to volume of transformer Change.

Detailed description of the invention

Fig. 1 is the main view of the utility model.

Fig. 2 is the B direction view of Fig. 1.

Fig. 3 is the C-C cross-sectional view in Fig. 1.

Fig. 4 is the structure chart of static contact in the utility model.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing.

As shown, present embodiments providing a kind of no excitation disk neutral-point voltage-regulating tap switch, including 2 He of switch base The shaft 3 being threaded on switch base, 3 upper end attended operation positioning device 1 of shaft, clip type moving contact is installed in the lower end of shaft 3 4, the upper and lower moving contact of the clip type moving contact matches with the column static contact 5 that 2 lower section of switch base is circumferentially laid is installed in It sets, the group number of the static contact is corresponding with the number of moving contact, and every group of static contact includes multiple static contacts, and the present embodiment is with quiet Contact is illustrated for being 3 groups, and as three-phase keeps off voltage-regulation tap changer without excitation disk neutral point 3.The two of the moving contact 4 End is in the curved of evagination, and centre is the curved of indent, and centre smoothly transits with both ends to be connect, the outer salient point at both ends and centre Interior concave point difference in height formed an overtravel 10.When switching shift, when moving contact 4 rotates, the setting of overtravel 10 makes Rotating torque increases, to another gear after engage again, an operating handle is increased to shift and positioning in this way, while in bullet Under spring force effect, moving contact energy automatic homing to center position improves positioning accuracy and contact performance.

In the present embodiment, in every phase static contact, setting insulation boss 9 between adjacent static contact, in clip type moving contact Radial outside be equipped with clip type auxiliary contact 7, the clip type auxiliary contact includes upper and lower auxiliary contact, the upper auxiliary Contact correspondence is connected with upper moving contact, and the lower auxiliary contact correspondence is connected with lower moving contact.The upper and lower auxiliary contact is The convex outward of the curved of evagination, the two is oppositely arranged.The thickness of the insulation boss 9 is greater than the thickness of static contact 5, is opening When closing shift, when rotating the shaft, the upper and lower end face of the arcuate surface and insulation boss of upper and lower auxiliary contact mutually rubs, due to The thickness of insulation boss is greater than the dynamic spacing touched in operating position of upper and lower auxiliary, and moving contact 4 is lifted with auxiliary contact 7, to separately When one gear, insulation boss 9 is skidded off with auxiliary contact, the contact point 8 of static contact is fallen into, combines the contact of dynamic/static contact, this Sample reduces the friction between dynamic/static contact, further improves operating handle, improves mechanical life and the contact of dynamic/static contact Performance.

In the present embodiment, the static contact 5 is cylindric or flat column, and the static contact 5 includes 10 He of static contact ontology Connecting terminal 11, the static contact ontology are connected with connecting terminal by gradual transition section, and the static contact ontology 10 protrudes into out Seat inner cavity is closed, connecting terminal 11 is stretched out outside switch base and bent downward, and wiring hole 6 is equipped in connecting terminal 11.Wherein, described The outer diameter of static contact ontology 10 is less than the outer diameter of connecting terminal 11, so that oil clearance distance of the adjacent static contact in insulating base Become larger, further improve dielectric level, switch outer diameter can also be further reduced, so that switch is occupied inside transformer space and become It is small, it is conducive to volume of transformer and minimizes.

Claims (4)

1. a kind of no excitation disk neutral-point voltage-regulating tap switch, including switch base and the shaft being threaded on switch base, shaft Clip type moving contact, the upper and lower moving contact of the clip type moving contact are installed in upper end attended operation positioning device, the lower end of shaft Be installed in the column static contact phase configuration circumferentially laid below switch base, the number phase of the group number and moving contact of the static contact It is corresponding, it is characterised in that: the two sides that the moving contact is contacted with static contact are in the curved of evagination, and centre is the curved surface of indent Shape, centre smoothly transits with both ends to be connect, and the difference in height of the outer salient point at both ends and intermediate interior concave point forms an overtravel.

2. a kind of no excitation disk neutral-point voltage-regulating tap switch according to claim 1, it is characterised in that: every group of stationary contact In head, setting insulation boss between adjacent static contact is equipped with clip type auxiliary contact, institute in the radial outside of clip type moving contact The thickness for stating insulation boss is greater than spacing of the upper and lower auxiliary contact at operating position, and the clip type auxiliary contact is used for Switch shift when with insulation boss phase configuration.

3. a kind of no excitation disk neutral-point voltage-regulating tap switch according to claim 1 or 2, it is characterised in that: described Clip type auxiliary contact includes upper and lower auxiliary contact, and the upper and lower auxiliary contact is the curved of evagination, the outer evagination of the two Face is oppositely arranged, and the upper auxiliary contact correspondence is connected with upper moving contact, the lower auxiliary contact correspondence and lower moving contact phase Even.

4. a kind of no excitation disk neutral-point voltage-regulating tap switch according to claim 3, it is characterised in that: on described, The arcuate surface and insulation boss of lower auxiliary contact are located on same circumference.