CN202638878U - Quick return circuit of cold reducing mill - Google Patents
Quick return circuit of cold reducing mill Download PDFInfo
- Publication number
- CN202638878U CN202638878U CN2012202847220U CN201220284722U CN202638878U CN 202638878 U CN202638878 U CN 202638878U CN 2012202847220 U CN2012202847220 U CN 2012202847220U CN 201220284722 U CN201220284722 U CN 201220284722U CN 202638878 U CN202638878 U CN 202638878U
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- CN
- China
- Prior art keywords
- power supply
- field power
- quick return
- exciting
- differential protection
- 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 - Fee Related
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Abstract
The utility model provides a quick return circuit of a cold reducing mill, and the quick return circuit comprises a direct-current motor, and the quick return circuit is characterized in that an exciting winding of the direct-current motor is respectively connected with a first exciting power supply and a second exciting power supply; and the voltage of the first exciting power supply is 180V, and the voltage of the second exciting power supply is 50V. The quick return of the cold reducing mill is improved on the basis of the existing circuit, the first exciting power supply and the second exciting power supply with different voltages are introduced, the quick return exciting voltage is reduced to 50V, and the exciting voltage in feeding process and quick return process is maintained at 180V. The exciting voltage is reduced for quick return, so that the rotation speed of the direct-current motor is increased, the torque is reduced, and the production efficiency is greatly improved.
Description
Technical field
The utility model belongs to the cold pilger mill control field, is specifically related to a kind of quick rewind down circuit of cold pilger mill.
Background technology
Cold pilger mill is a kind of equipment of professional production seamless steel pipe, and existing cold pilger mill is to utilize annular distance shape roll to carry out the cold conditions rolling to the base pipe substantially.The cold pilger mill of annular distance shape roll includes actuating unit, frame and is arranged on plug, roll, gear and the tooth bar etc. on frame, forms well-regulated cavity between roll and plug, utilizes the strain of metal to realize the rolling of base pipe.Cold pilger mill, when work, has first and second to send to and rapid-return motion in each period of motion of roll.And cold pilger mill fast forwarding and fast rewinding direct current generator of the prior art all adopts standard excitation voltage 180V, it is satisfactory sending to like this with the speed of F.F., but the speed on rewind down during the blank pipe is too slow, makes the production efficiency of cold pilger mill lower.
The utility model content
The utility model, for above-mentioned the deficiencies in the prior art, provides a kind of quick rewind down circuit of the cold pilger mill that can enhance productivity
.
The utility model is achieved by the following technical solution:
A kind of quick rewind down circuit of cold pilger mill, comprise direct current generator, it is characterized in that, described
The Exciting Windings for Transverse Differential Protection of direct current generator all is connected with the second field power supply with the first field power supply; The voltage of the first field power supply is 180V, and the voltage of the second field power supply is 50V; Be provided with the first switch between Exciting Windings for Transverse Differential Protection and the first field power supply, between Exciting Windings for Transverse Differential Protection and the second field power supply, be provided with second switch; The first switch closure, when second switch is opened, Exciting Windings for Transverse Differential Protection and the first field power supply are connected; The first switch opens, when second switch is closed, Exciting Windings for Transverse Differential Protection and the second field power supply are connected.
Further, described the first field power supply is AC power, and the first field power supply is connected with Exciting Windings for Transverse Differential Protection by the first bridge rectifier.
Further, described the second field power supply is AC power, and the second field power supply is connected with Exciting Windings for Transverse Differential Protection by the second bridge rectifier.
The quick rewind down circuit of cold pilger mill described in the utility model improves on the basis of available circuit, it has introduced different the first field power supply and the second field power supplies of voltage, excitation voltage during by rewind down is down to 50V, and the excitation voltage 180V while keeping sending to F.F. is constant.During rewind down, excitation voltage descends, and can make the rise of rotational speed of direct current generator, and moment of torsion descends, and greatly enhances productivity.
The accompanying drawing explanation
The schematic diagram of the quick rewind down circuit that Fig. 1 is cold pilger mill described in the utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
As shown in Figure 1, the utility model provides a kind of quick rewind down circuit of cold pilger mill, comprise direct current generator, the Exciting Windings for Transverse Differential Protection of direct current generator all is connected with the second field power supply (i.e. field power supply B in figure) with the first field power supply (i.e. field power supply A in figure); The voltage of the first field power supply is 180V, and the voltage of the second field power supply is 50V, enables the first field power supply of 180V while sending to F.F., enables the second field power supply of 50V during rewind down.Preferably, described the first field power supply is AC power, and the first field power supply is connected with Exciting Windings for Transverse Differential Protection by the first bridge rectifier.Described the second field power supply is AC power, and the second field power supply is connected with Exciting Windings for Transverse Differential Protection by the second bridge rectifier.For the ease of switching the first field power supply and the second field power supply, be provided with the first K switch M1 between Exciting Windings for Transverse Differential Protection and the first field power supply, be provided with second switch KM2 between Exciting Windings for Transverse Differential Protection and the second field power supply, the first K switch M1 closure, when second switch KM2 opens, Exciting Windings for Transverse Differential Protection and the first field power supply are connected; The first K switch M1 opens, and when second switch KM2 is closed, Exciting Windings for Transverse Differential Protection and the second field power supply are connected.
The utility model not only is confined to the above-mentioned specific embodiment; persons skilled in the art are according to the disclosed content of the utility model; can adopt other multiple specific embodiment to implement the utility model; therefore; every employing project organization of the present utility model and thinking; do some simple designs that change or change, all fall into the scope of the utility model protection.
Claims (3)
1. the quick rewind down circuit of a cold pilger mill, comprise direct current generator, it is characterized in that, described
The Exciting Windings for Transverse Differential Protection of direct current generator all is connected with the second field power supply with the first field power supply; The voltage of the first field power supply is 180V, and the voltage of the second field power supply is 50V; Be provided with the first switch between Exciting Windings for Transverse Differential Protection and the first field power supply, between Exciting Windings for Transverse Differential Protection and the second field power supply, be provided with second switch; The first switch closure, when second switch is opened, Exciting Windings for Transverse Differential Protection and the first field power supply are connected; The first switch opens, when second switch is closed, Exciting Windings for Transverse Differential Protection and the second field power supply are connected.
2. the quick rewind down circuit of cold pilger mill according to claim 1, is characterized in that, described the first field power supply is AC power, and the first field power supply is connected with Exciting Windings for Transverse Differential Protection by the first bridge rectifier.
3. the quick rewind down circuit of cold pilger mill according to claim 1, is characterized in that, described the second field power supply is AC power, and the second field power supply is connected with Exciting Windings for Transverse Differential Protection by the second bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202847220U CN202638878U (en) | 2012-06-13 | 2012-06-13 | Quick return circuit of cold reducing mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202847220U CN202638878U (en) | 2012-06-13 | 2012-06-13 | Quick return circuit of cold reducing mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202638878U true CN202638878U (en) | 2013-01-02 |
Family
ID=47408056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202847220U Expired - Fee Related CN202638878U (en) | 2012-06-13 | 2012-06-13 | Quick return circuit of cold reducing mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202638878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD982375S1 (en) | 2019-06-06 | 2023-04-04 | Sharkninja Operating Llc | Food preparation device |
-
2012
- 2012-06-13 CN CN2012202847220U patent/CN202638878U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD982375S1 (en) | 2019-06-06 | 2023-04-04 | Sharkninja Operating Llc | Food preparation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20150613 |
|
| EXPY | Termination of patent right or utility model |