CN208225724U - A kind of dish type off circuit tap changer - Google Patents

Abstract

The utility model discloses a kind of dish type off circuit tap changers, including switch base and the shaft being threaded on switch base, shaft upper end attended operation positioning device, install moving contact in the lower end of shaft, moving contact circumferentially-spaced laying is corresponded on switch base static contact, it is characterized by: the static contact includes static contact ontology and the connecting terminal that is connected with static contact ontology, the static contact ontology and moving contact phase configuration, the connecting terminal stretches out outside switch base, it concentrates and turns to from the tap wire direction that transformer coil comes out along switch base circumferencial direction while bending downward.The connecting terminal of the static contact of the utility model is bent downwardly, and comes out direction towards the lead of transformer, more conducively reduction lead bending radius, to reduce tap switch and lead portion occupancy inside transformer space, is kept lead arrangement more attractive and is saved.

Description

A kind of dish type off circuit tap changer

Technical field

The utility model relates to a kind of dish type off circuit tap changers.

Background technique

A kind of dish type off circuit tap changer is disclosed in Chinese patent CN01212470.2, column static contact is radial Distribution is stretched out outside switch base, in a ring aplysia punctata, has hole for being connected with the lead in transformer coil inside static contact, by There must be certain bending radius when the transformer lead to come from two sides couples with each static contact, cause dish type without encouraging in this way The outer diameter of the connection lead of magnetic tap switch can be bigger, will lead to for transformer lesser for capacity from transformer Other components (such as casing and its tail portion) and other leads and tank wall are closer, and such insulating reliability can reduce, to distribution Fuel tank width also have to often be widened for transformer, cause the increase of volume of transformer, weight and cost.

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 The static contact structure for improving electric field, connecting dish type off circuit tap changer reliable, that installation space can be reduced.

The technology employed by the present utility model is a kind of dish type off circuit tap changer, including switch base and install In the shaft on switch base, shaft upper end attended operation positioning device, moving contact is installed in the lower end of shaft, corresponds on switch base dynamic Contact circumferentially-spaced laying has static contact, it is characterised in that: the static contact include static contact ontology and with static contact ontology phase Connecting terminal even, the static contact ontology and moving contact phase configuration, the connecting terminal stretches out outside switch base, in opposite stationary contact It concentrates and turns to from the tap wire direction that transformer coil comes out along switch base circumferencial direction while the downward back bending of head ontology is rolled over.

According to the above technical scheme, the connecting terminal is cylindric, and cold pressing wiring hole is equipped in it.

According to the above technical scheme, stating static contact is that hollow barred body or solid stick are bent.

According to the above technical scheme, 3 groups of static contacts are laid on switch base, every group of static contact is made of multiple static contacts, and 3 Group static contact is spaced uniformly distributed in a ring, wherein two groups of static contacts are symmetrically arranged, the equal court of the connecting terminal of three groups of static contacts Lead direction on transformer.

According to the above technical scheme, the static contact ontology is connected with connecting terminal by arc-shaped transition section, the arc mistake Section is crossed to be embedded in switch base.

According to the above technical scheme, the moving contact is that radial elastic rolls moving contact, and the radial elastic rolls moving contact Including the cydariform moving contact being installed in shaft limit cavity, radial elastic cushion block, outside are configured on the inside of the cydariform moving contact With static contact phase configuration, the upper and lower ends of the radial elastic cushion block and the end in contact up and down of cydariform moving contact lateral wall.

According to the above technical scheme, the radial elastic cushion block includes the cushion block and and cushion block being installed in shaft limit cavity The spring of phase configuration, the cushion block are cooperated by spring and the limit cavity of shaft, prevent it from rotating and expandable, and The cushion block is made of plastics.

According to the above technical scheme, the cushion block includes cushion block body, the side of cushion block body be equipped with cylindrical boss or Cavity, the spring pocket is outside boss or in cavity, and the upper and lower end in the other side of cushion block body is equipped with and the dynamic touching of cydariform The flange that matches of head upper and lower side is hollow form structure between two flanges.

According to the above technical scheme, the cushion block body is bulk, and the end of two flange of cushion block is corresponding recessed by arc Face section is connected, and constitutes the hollow form structure of cushion block.

Have the beneficial effect that the connecting terminal of the static contact of the utility model is bent downwardly acquired by the utility model, and Towards the tap wire direction of the coil of transformer, more conducively reduction lead bending radius, to reduce tap switch and lead Part occupies inside transformer space, keeps lead arrangement more attractive and saves；The connecting terminal of static contact ontology passes through arc mistake It crosses section to be connected, which reduces point discharge, improves the electric field in transformer；Pass through setting annular Moving contact and elastic cushion block, the upper and lower side friction of elastic cushion block and cydariform moving contact, and intermediate position is not contacted with moving contact, To protect the overlay coating or surface quality of moving contact contact site, contact static contact with moving contact reliably, further Extend its service life.

Detailed description of the invention

Fig. 1 is a kind of structure chart of embodiment provided by the utility model.

Fig. 2 is the A direction view in Fig. 1.

Fig. 3 is the structure chart of static contact in the utility model.

Fig. 4 is the structure chart of another embodiment provided by the utility model.

Fig. 5 is the schematic enlarged-scale view in Fig. 4 at I.

Fig. 6 is the structural schematic diagram of cushion block in the utility model.

Specific embodiment

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

As shown in Figs. 1-2, it present embodiments provides a kind of dish type off circuit tap changer, including switch base 2 and is threaded onto Shaft 4 on switch base, 4 upper end attended operation positioning device 1 of shaft, the lower end of shaft 4 install radial elastic and roll moving contact 3, radial elastic is corresponded on switch base rolling 3 circumferentially-spaced laying of moving contact has 3 phase static contacts 5, and every phase static contact is by multiple quiet Contact is constituted, and the static contact 5 includes column static contact ontology 6 and connecting terminal 7, the static contact ontology 6 and radial elastic Roll 3 phase configuration of moving contact, the upper end of the static contact ontology 6 bends downward to form connecting terminal 7, the static contact ontology with Connecting terminal is connected by arc-shaped transition end.The connecting terminal 7 stretches out outside switch base, in the opposite downward back bending of static contact ontology It concentrates and turns to from the tap wire direction that transformer coil comes out along switch base circumferencial direction while folding.Wherein, connecting terminal 7 can Think tubulose, it is interior to be equipped with cold pressing wiring hole (as shown in Figure 3)；When to be flat, on it be equipped with connecting hole, for draw Line connection.

In the present embodiment, the static contact 5 be bent to form after hollow barred body or solid stick beat wiring hole (such as Fig. 3 with To be illustrated for hollow barred body).

In the present embodiment, 3 phase static contacts are spaced uniformly distributed in a ring, and the connecting terminal of three-phase static contact is towards transformation Tap wire direction side on device, wherein two-phase static contact is symmetrically arranged, and such setting, not only winding displacement is more compact, beautiful It sees, and is more conducive to reduce lead bending radius, so that reducing tap switch occupies inside transformer space.

For single-phase dish type tap switch, then static contact only has the phase in figure, and connecting terminal respectively also turns to tap Line side, only each connecting terminal circumferentially rotates that angle is smaller, and switching this word diameter dimension also will be smaller at this time.

The radial elastic of the utility model rolls moving contact and is not limited to the structure in Fig. 1, or cydariform moving contact, When for cydariform moving contact, since the surface of roller moving contact is equipped with coating, the plating on cydariform moving contact is made after shifting gears for a long time Silver layer serious wear, the contact performance between cydariform moving contact and static contact are affected, and cause its service life short or contact Reliability reduces.Therefore, the structure that the present embodiment rolls moving contact also directed to radial elastic is correspondingly improved, such as Fig. 4-6 Shown, it includes the cydariform moving contact 3 being installed in shaft limit cavity 10, cydariform moving contact that the radial elastic, which rolls moving contact, 3 shapes are outer gibbosity.Radial elastic cushion block, outside and static contact phase configuration are configured on the inside of the cydariform moving contact 3.The radial direction Elastic cushion block includes the cushion block 9 being installed in shaft limit cavity 10 and the spring 11 with cushion block phase configuration.The cushion block 9 includes Blocky cushion block body 13 is equipped with cylindrical boss 14 (may also set up cavity) in the side of cushion block body 13, and the spring 11 is set with Outside boss, the upper and lower end in the other side of cushion block body is equipped with the flange 12 matched with cydariform moving contact upper and lower side, and two It is connected between flange by the transition of arc-shaped concave end, it is interior to form hollow form structure, make two flanges up and down of cushion block and dynamic touching First 3 outside upper and lower side forms point or line contact, the interlude without the appearance with moving contact contact.To among moving contact Boss does not generate friction with cushion block, to protect the overlay coating or surface quality of moving contact contact site, makes contact Structure contact is reliable, further extends its service life.

Claims (5)

1. a kind of dish type off circuit tap changer, including switch base and the shaft being threaded on switch base, shaft upper end connection behaviour Make positioning device, moving contact is installed in the lower end of shaft, and moving contact circumferentially-spaced laying is corresponded on switch base static contact, feature Be: the static contact includes static contact ontology and the connecting terminal that is connected with static contact ontology, the static contact ontology and dynamic Contact phase configuration, the connecting terminal stretch out outside switch base, and the downward back bending folding of opposite static contact ontology, at least partly terminals The line direction at itself opposite static contact ontology of son and switch base center deflects, and the tap wire that direction comes out from transformer coil Direction side.

2. a kind of dish type off circuit tap changer according to claim 1, it is characterised in that: the connecting terminal is cylinder Shape is equipped with cold pressing wiring hole in it.

3. a kind of dish type off circuit tap changer according to claim 1, it is characterised in that: the static contact is hollow bar Body or solid stick are bent.

4. a kind of dish type off circuit tap changer according to claim 1 or 2 or 3, it is characterised in that: the cloth on switch base Equipped with 3 phase static contacts, every phase static contact is made of multiple static contacts, and 3 phase static contacts are spaced uniformly distributed in a ring, wherein two Phase static contact is symmetrically arranged, and the connecting terminal of three-phase static contact is towards the lead direction on transformer.

5. a kind of dish type off circuit tap changer according to claim 1 or 2 or 3, it is characterised in that: the static contact sheet Body is connected with connecting terminal by arc-shaped transition section, and the arc-shaped transition section is embedded in switch base.