CN203859058U - Vacuum tube driving mechanism of on-load tap-changer - Google Patents
Vacuum tube driving mechanism of on-load tap-changer Download PDFInfo
- Publication number
- CN203859058U CN203859058U CN201420271970.0U CN201420271970U CN203859058U CN 203859058 U CN203859058 U CN 203859058U CN 201420271970 U CN201420271970 U CN 201420271970U CN 203859058 U CN203859058 U CN 203859058U
- Authority
- CN
- China
- Prior art keywords
- vacuum tube
- driving mechanism
- load tap
- tap changer
- roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 28
- 238000004512 die casting Methods 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000008859 change Effects 0.000 description 9
- 238000004804 winding Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model provides a vacuum tube driving mechanism of an on-load tap-changer, and the driving mechanism is used for connecting or disconnecting vacuum tubes respectively arranged in an installation support and centering on a central rotating shaft along the same circumference at intervals. The vacuum tube driving mechanism is improved in that the driving mechanism comprises a cam disc, a roller and a pull rod, the circumference of the cam disc, corresponding to the vacuum tubes, is provided with arc hollow rails at intervals, two ends of the rails are provided with slopes, and the roller on the rails is connected with the vacuum tube via the pull rod penetrating through the rails. Compared with the prior art, according to the vacuum tube driving mechanism of the on-load tap-changer, the vacuum tube is employed to serve as a mechanical contact potential switch of the on-load tap-changer so that the problem of severe burning loss of the contact is prevented, the conventional complicated lever structure is omitted, the structure is simple, the positioning is accurate, and safety and reliability are realized.
Description
Technical field
The utility model relates to a kind of on load tap changer, specifically relates to a kind of vacuum tube driving mechanism of on load tap changer.
Background technology
On load tap changer is a kind ofly to provide the switching device of constant voltage when the load variations for transformer.Its fundamental sum principle is exactly in the situation that guaranteeing not interrupt load electric current, realizes the switching between tap in Transformer Winding, thereby changes the number of turn of winding, i.e. the voltage ratio of transformer finally realizes the object of pressure regulation.
The on load tap changer that at present the domestic transformer that is used in rectification, smelting, rail traction is joined is mostly that Quick resistance switches, and by arcing contact system, when current zero-crossing point, the principle of arc extinction carried out to work.This switching principle especially for transformer work to switch the contact burning of shunting switch frequently more serious, the failure rate of switch is higher, the carbonization speed of oil is fast, has increased regular maintenance amount thus to power supply department.
Vacuum on-load operation switch, mainly realizes arc extinction by the vacuum tube of diverter switch, and electric arc and red-hot gas do not expose; The indoor oil of tap switch oil can carbonization and pollution, and oil does not need to purify; In vacuum tube, the corrosion of the scaling loss of contact can drop to bottom line.The change over selector of on load tap changer is by can current-carrying, but can not connect with drop-out current design; It and tap selector or selector switch join together, when moving on to the other end from an end position, make the contact of tap selector or selector switch and are connected to more than tap on contact can use once.Change over selector is divided into coarse change over selector and polarity change over selector.No matter the shunting switch of the on-load tap-changing transformer in high voltage range is to adopt positive and negative or thickness to arrange, when the change over selector transition period, pressure regulation winding has in a flash separated electric with main winding, in " suspension " state.At this moment, pressure regulation winding obtains a coupling capacitance or to the determined new current potential of coupling capacitance between contiguous winding over the ground.The new current potential at pressure regulation winding two ends and the difference of beginning prepotential are called offset voltage, form the recovery voltage of port between the contact that this offset voltage disconnects at change over selector.For the change over selector of combined loaded tap-changer, as recovery voltage >=35kV; The change over selector of combined load ratio bridging switch, when recovery voltage >=15kV should configure current potential resistance or current potential resistance comes connection transformer pressure regulation winding and shunting switch by level switch.
Original level switch adopts mechanical contact (copper tungsten contact), and contact burning is more serious.Original vacuum tube drive form is to adopt central rotating shaft to drive cam disc to rotate, it passes to motion the metal roller moving near its edge, metal roller is moved on metal track, thereby by bimetallic lever, metal pull bar is moved up and down, change vacuum tube and disconnect and closure state, complex structure.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of vacuum tube driving mechanism of on load tap changer, adopts vacuum tube as the mechanical contact level switch of on load tap changer, has avoided the problems such as contact burning is more serious; And traditional complicated lever construction, simple in structure, accurate positioning, safe and reliable have been saved.
The purpose of this utility model is to adopt following technical proposals to realize:
The vacuum tube driving mechanism of a kind of on load tap changer that the utility model provides, described driving mechanism is separately positioned in mounting bracket 1 and take central rotating shaft 3 as the center of circle along the vacuum tube 2 of same circle spacing setting for UNICOM or disconnection; Its improvements are: described driving mechanism comprises cam disc 4, roller 6 and pull bar 7, and the circle spacing corresponding with vacuum tube 2 on described cam disc 4 is provided with arc hollow track, and described track two ends are provided with slope; The roller 6 being arranged on described track is connected with vacuum tube 2 by the pull bar 7 through track.
Wherein, described cam disc 4 is connected with central rotating shaft 3 by centre bore, and synchronizes rotation with central rotating shaft 3.
Wherein, described vacuum tube 2 is parallel to each other with central rotating shaft 3; The length of described vacuum tube 2 is less than the length of central rotating shaft 3.
Wherein, described cam disc 4 forms for insulator die casting.
Wherein, described roller 6 ends are provided with touch spring 5.
Wherein, described roller 6 and pull bar 7 are pin joint.
Wherein, the gradient on slope, described track two ends is 30 °.
Wherein, prepare described pull bar 7 and make for steel material, be preferably C45.
Compared with prior art, the beneficial effect that the utility model reaches is:
1, adopt vacuum tube as the mechanical contact level switch of on load tap changer, avoided the problems such as contact burning is more serious.
2, cam disc is by central rotating shaft driven rotary, and roller forwards track slope to and makes pull bar moving linearly and pull open vacuum tube, and this driving mechanism has saved traditional complicated lever construction, simple in structure, accurate positioning, safe and reliable.
3, applied widely, good economy performance, is convenient to marketing.
4, the material mixture ratio that pull bar adopts, has higher intensity, hardness, resistance to wear and good toughness, and also greatly increase useful life.
Accompanying drawing explanation
Fig. 1 is: the structural representation of the vacuum tube driving mechanism of the on load tap changer that the utility model provides;
Wherein: 1, mounting bracket; 2, vacuum tube; 3, central rotating shaft; 4, cam disc; 5, touch spring; 6, roller; 7, pull bar.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
It is example that the present embodiment be take the vacuum tube driving mechanism of on load tap changer, the vacuum tube driving mechanism of the on load tap changer that as shown in Figure 1, the present embodiment provides comprises: mounting bracket 1, vacuum tube 2, central rotating shaft 3, cam disc 4, touch spring 5, roller 6, pull bar 7; Vacuum tube 2 and central rotating shaft 3 are parallel to each other and are vertically lifted on same workbench, and vacuum tube 2 is fixed on workbench by mounting bracket 1; The insulation cam disc 4 that die casting forms is fixed on central rotating shaft 3, in the card of cam disc 4 and with the crossing circumference of the central axis of vacuum tube 2 on interval have three hollow arc tracks, at the two ends of track, be provided with 30 ° of slopes; Roller 6 is installed in orbit and is connected with vacuum tube 2 by the metal pull bar 7 through track.
Central rotating shaft 3 drives cam discs 4 rotations, and roller 6 move in orbit, and when roller 6 moves on the slope of track, pull bar 7 is subject to the pulling force of roller 6 to do downward rectilinear motion, by the contact disconnection of vacuum tube 2; When central rotating shaft 3 drives cam disc 4 rotations again, roller 6 is from the slope landing of track, and touch spring 5 pushing drawing rods 7 are done upwards rectilinear motion, by the contact UNICOM of vacuum tube 2.This driving mechanism has saved traditional complicated lever construction, simple in structure, safe and reliable.
For guarantee driving mechanism efficiently, UNICOM or disconnect vacuum tube 2 accurately, need pull bar 7 to keep good machinery and physical property, by steel material, made, be preferably C45, there is higher intensity, hardness, resistance to wear and good toughness, also greatly increase useful life, guaranteed the normal work of driving mechanism.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although the utility model is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not depart from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (7)
1. a vacuum tube driving mechanism on load tap changer, described driving mechanism is separately positioned in mounting bracket (1) and take central rotating shaft (3) as the center of circle along the vacuum tube (2) of same circle spacing setting for UNICOM or disconnection; It is characterized in that: described driving mechanism comprises cam disc (4), roller (6) and pull bar (7), in the upper circle spacing corresponding with vacuum tube (2) of described cam disc (4), be provided with arc hollow track, described track two ends are provided with slope; The roller (6) being arranged on described track is connected with vacuum tube (2) by the pull bar (7) through track.
2. the vacuum tube driving mechanism of on load tap changer as claimed in claim 1, is characterized in that, described cam disc (4) is connected with central rotating shaft (3) by centre bore, and synchronizes rotation with central rotating shaft (3).
3. the vacuum tube driving mechanism of on load tap changer as claimed in claim 1, is characterized in that, described vacuum tube (2) is parallel to each other with central rotating shaft (3); The length of described vacuum tube (2) is less than the length of central rotating shaft (3).
4. the vacuum tube driving mechanism of on load tap changer as claimed in claim 1, is characterized in that, described cam disc (4) forms for insulator die casting.
5. the vacuum tube driving mechanism of on load tap changer as claimed in claim 1, is characterized in that, described roller (6) end is provided with touch spring (5).
6. the vacuum tube driving mechanism of on load tap changer as claimed in claim 1, is characterized in that, described roller (6) and pull bar (7) are pin joint.
7. the vacuum tube driving mechanism of on load tap changer as claimed in claim 1, is characterized in that, the gradient on slope, described track two ends is 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420271970.0U CN203859058U (en) | 2014-05-26 | 2014-05-26 | Vacuum tube driving mechanism of on-load tap-changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420271970.0U CN203859058U (en) | 2014-05-26 | 2014-05-26 | Vacuum tube driving mechanism of on-load tap-changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203859058U true CN203859058U (en) | 2014-10-01 |
Family
ID=51608900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420271970.0U Expired - Lifetime CN203859058U (en) | 2014-05-26 | 2014-05-26 | Vacuum tube driving mechanism of on-load tap-changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203859058U (en) |
-
2014
- 2014-05-26 CN CN201420271970.0U patent/CN203859058U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |