CN103314425A

CN103314425A - Tap changer

Info

Publication number: CN103314425A
Application number: CN2012800058285A
Authority: CN
Inventors: C·伯格尔; T·霍特纳; M·雅塔; P·莱德雷尔; S·雷科普夫; K·施莱普; R·施特伦佩尔
Original assignee: Maschinenfabrik Reinhausen GmbH
Current assignee: Maschinenfabrik Reinhausen GmbH; Scheubeck GmbH and Co
Priority date: 2011-01-20
Filing date: 2012-01-04
Publication date: 2013-09-18
Anticipated expiration: 2032-01-04
Also published as: EP2666172B1; ES2580958T3; WO2012097959A8; BR112013016126B1; EP2666172A1; DE102011008964A1; UA116523C2; CN103314425B; WO2012097959A1; BR112013016126A2; DE102011008964B4

Abstract

The invention relates to a tap changer for switching among different winding taps of a step transformer without interruption according to the preamble of the first patent claim. The general inventive concept lies in proposing a contact unit comprising several identically constructed contact carriers, which can assembled among each other by simple plugging to form a finished contact unit, wherein the individual contact carriers can each be fixed to the switching shaft by means of a bowed clamp and wherein furthermore at least two specially geometrically formed pins are provided as rotation-preventing elements on each contact carrier, on the side facing the switching shaft, which pins can be brought into engagement in the blind holes provided in the switching shaft in such a way that the entire contact unit is thus secured against rotation.

Description

Shunting switch

Technical field

The present invention relates to a kind of shunting switch between the different tappings of adjustable variable-pressure device, interruptedly do not change of being used for of preamble according to claim 1.

Background technology

For many years, shunting switch is installed in the transformer, in order to can recently adjust voltage, active power and the reactive power of electrical network by changing transformation under load.

Known shunting switch is known two kinds of basic structure modes: in a kind of frame mode, shunting switch comprises assembly separately, is step-selector and load transducer; In the second frame mode, these two assemblies are merged into a load selector, and it carries out two kinds of functions.The term " shunting switch " that uses hereinafter should comprise above-mentioned two kinds of frame modes.

The adjustment of transformation ratio is hierarchically carried out; Transformer is equipped with the tap winding for this reason, and its tap can be connected by shunting switch.

This load selector or step-selector are fully open by DE3827385.The document has been described fixing on transaxle of contact holder, should fixing not carry out like this when having the hole in transaxle, namely twines flange and the transaxle of contact holder by the insulating tape of the self-hardening of resin-dipping.

As described, by this winding not only avoided as described in transaxle for electric reason or for intensity reason undesirable hole all, nor must be near the fastener of transaxle inside, such as nut.

However, this also unsuccessful by the fixing means that twines.Its reason is on the one hand, must have relatively many spaces around switching post in this fixed form, in order to can twine insulating tape and also need use resin-dipping in case of necessity around switching post.On the other hand, in the situation that for example in maintenance work, do not having higher expending again contact holder and transaxle to be separated under this fixing.Damage forcibly the insulation twister and must correspondingly use new at this.

DE4414951 discloses a kind of step-selector for the adjustable variable-pressure device, and this step-selector comprises the insulating material cylinder and is arranged on and inner can by the transaxle of known drive means rotation, be provided with fixing minute contact point in insulating material cylinder inboard.Fix one or more contact point unit at this at transaxle, described contact point unit has respectively again at least one double-throw contact.Each contact point unit is fixed on the transaxle by the holding ring that is configured to Flange-shaped Parts of a two-piece type, so that this contact point unit is fixedly connected with parts of the holding ring of two-piece type, and two parts Flange-shaped Parts ground of holding ring surround transaxles and the clamping device that is extended outside transaxle clamps each other.In addition, at the outer surface of transaxle at least one centering servicing unit is set, this centering servicing unit is corresponding to the holding ring of two-piece type and guarantee that unique position relationship of contact point unit and while additionally prevent from reversing.

The transaxle that forcibly reprocessing, especially turning are generally made by fiberglass reinforced plastics in known solution, this brings significant time and cost payout.This say technically be force essential because be configured to the holding ring of two-piece type and Flange-shaped Parts needs explication as bearing-surface transaxle diameter, so that lasting and firmly fix.In DE4414951, the centring pin that inserts in the blind hole is used as anti-rotation lock.But this solution that the applicant proposes is proved to be unpractical in practice, and this is because centring pin is not suitable for transmission power, but exactly bears high mechanical shear stress simultaneously when transaxle rotates.Therefore, aspect manufacturing technology and cost, there are as a whole the improvement potentiality.

Summary of the invention

Therefore, task of the present invention be to provide a kind of can be simply and the contact point unit of low cost fabrication, this contact point unit can be lastingly and stably is connected with transaxle and need not contact point unit is connected with the transaxle spiral in addition.

According to the present invention, the shunting switch of the feature of this task by having claim 1 is solved.Dependent claims relates to the favourable expansion scheme of the present invention at this.

Be in this basic inventive concept, a kind of contact point unit that comprises the contact holder of a plurality of same configuration is proposed, described contact holder can be assembled into the contact point unit of finishing by being plugged in together simply to each other, each contact holder can be fixed on the transaxle by arc clip respectively, in addition as anti-rotation lock on each contact holder, namely at the tenon that at least two special shapings of geometry are set towards a side of transaxle, described tenon can be bonded in the blind hole that is arranged in the transaxle, so that whole contact point unit is prevented from reversing thus.By making the contact point unit of finishing comprise that the contact holder that need only be plugged in together along different directions of a plurality of same configuration, manufacturer save that huge manufacturing technology expends and therefore save cost.Thus also so that the fittings supply of manufacturer is simpler, because for whole assembly, need only provide less parts.The holding ring that replaces being configured to two-piece type and Flange-shaped Parts uses a plurality of arc clips to be proved to be to bear lastingly the solution of mechanical load.This is especially because form larger mechanical support face and therefore produce larger force closure by a plurality of arc clips at the periphery interface of transaxle.

Description of drawings

The below is by the exemplary detailed description the present invention of accompanying drawing.Accompanying drawing is as follows:

Fig. 1 is the end view according to the contact point unit for shunting switch of the present invention;

Fig. 2 a and 2b are the different views according to the contact holder of contact point unit of the present invention.

Embodiment

Fig. 1 illustrate for the shunting switch that is not shown specifically (because known) by a plurality of identical contact holders 1 structures according to contact point unit 2 of the present invention.Each contact holder 1 and therefore whole contact point unit 2 can be assemblied in for simplicity's sake on the same unshowned transaxle by arc clip 3.Each arc clip 3 is constructed to so that it mates simply the geometry of transaxle, is attached on the periphery interface of transaxle especially lastingly and stably.The respective end of arc clip 3 be contained in the sleeve with through hole 4 that is arranged on the contact holder 1 and by fastener 5(at this such as nut) prevent that accident from being fixed lastingly with deviating from.Therefore unlike the prior art, do not have the point-like bearing-surface at transaxle, but on the almost whole outer perimeter of transaxle by a plurality of arc clips 3 form large-area mechanical type contact sealed and therefore form than prior art in the larger force closure of force closure in the disclosed solution.

In addition, each contact holder 1 has respectively an admittance plate 7 at this switching device shifter that is not shown specifically of being used for that is provided with a plurality of holes 6.Described switching device shifter especially can be equally by the disclosed roll-type of prior art contact at this, and it is positioned each and admits between plate 7.For the reason of mechanical strength, admit plate 7 to strengthen by strengthening segment 8.Be respectively equipped with up and down directed and strip dog 9 that quantitatively replace in two sides of contact holder 1, described strip dog arranges about its a few tenths of millimeter ground that staggers highly separately from each other.This is because can squeeze into pin 10 when mounted contacts unit 2, this pin by strip dog 9 is set with staggering slightly mechanical deformation and so can prevent from undesirably skidding off, this also will be explained in the explanation of Fig. 2 a and b in detail.

Fig. 2 a and 2b illustrate according to the upward view of single contact holder 1 of the present invention and vertical view.The contact holder 1 of being made by non-conducting material is in both sides, namely have a plurality of pins 11 and blind hole 12 at upside and downside.Described pin and blind hole are orientated as so that when two or more contact holders 1 are plugged in together as shown in Figure 1, and the pin 11 of the corresponding upside of a contact holder 1 joins in the blind hole 12 of corresponding downside of another contact holder 1, and vice versa.The contact holder 1 of any amount can be plugged in together in this way and form contact point unit 2.In addition, strip dog 9 such sidewalls that stretch out corresponding contacts support 1 far awayly so that when two or more single contact holders 1 are plugged in together, can in the overlapping region of corresponding strip dog 9, squeeze into pin 10 for it is blocked, this in Fig. 1 same as seen.Machinery is fixing enduringly with two or more contact holders 1 thus in a word.

With admit on the plate 7 opposed zones, contact holder 1 has one and half shell zones 13, the sleeve 4 that is used for holding arc clip 3 also side direction is fixed on this half shell zone.By half shell 13, corresponding contact holder 1 is arranged on the unshowned transaxle.Fix as anti-rotation lock and for lasting machinery, on the inboard of half shell 13, namely at the tenon 14 of installing the special shaping of a plurality of geometries towards a side of transaxle, described tenon is bearing in the blind hole that is arranged on the transaxle in large area.

Claims

1. one kind is used for the shunting switch interruptedly do not change between the different tapping of adjustable variable-pressure device, and comprising: the insulating material cylinder is provided with the fixing minute contact point that can connect in the inboard of this insulating material cylinder; And at least one is arranged on inner transaxle, this transaxle can rotate by drive unit, and on this transaxle, can fix a contact point unit or for up and down stacked a plurality of contact point unit of a plurality of phases, described contact point unit has again at least one double-throw contact, can connect described fixing minute contact point by described double-throw contact, each contact point unit shape in locking manner position is fixed and can be fixed on the transaxle at the fastener that extends outside the transaxle

It is characterized in that, described contact point unit (2) comprises the contact holder (1) of a plurality of same configuration, each contact holder (1) can be fixed on the transaxle by arc clip (3) respectively, and contact holder (1) has at least two tenons (14) in the side towards transaxle, described tenon is bearing in the blind hole that is arranged on the transaxle in large area, so that whole contact point unit (2) is prevented from reversing thus.

2. shunting switch according to claim 1, it is characterized in that, each contact holder (1) has respectively a plurality of pins (11) and blind hole (12), and described pin and blind hole are orientated as mutually so that the pin (11) of the corresponding upside of one of them contact holder (1) can join in the blind hole (12) of corresponding downside of another contact holder (1).

3. shunting switch according to claim 1 and 2 is characterized in that, the respective end of described arc clip (3) is contained in the sleeve (4) that is arranged on the contact holder (1) and by fastener (5) and fixes enduringly.

4. according to claim 1 to one of 3 described shunting switchs, it is characterized in that, in two sides of each contact holder (1) directed up and down strip dog (9) is set, the described strip dog a few tenths of millimeter ground that staggers each other arranges.