CN202497944U - Variable-frequency control system for rotary electrode type electric precipitator - Google Patents
Variable-frequency control system for rotary electrode type electric precipitator Download PDFInfo
- Publication number
- CN202497944U CN202497944U CN2012200870561U CN201220087056U CN202497944U CN 202497944 U CN202497944 U CN 202497944U CN 2012200870561 U CN2012200870561 U CN 2012200870561U CN 201220087056 U CN201220087056 U CN 201220087056U CN 202497944 U CN202497944 U CN 202497944U
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- China
- Prior art keywords
- frequency converter
- control system
- type electric
- electrode type
- frequency
- 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
- 239000012716 precipitator Substances 0.000 title abstract 3
- 230000004224 protection Effects 0.000 abstract description 17
- 101100190617 Arabidopsis thaliana PLC2 gene Proteins 0.000 description 4
- 101100408456 Arabidopsis thaliana PLC8 gene Proteins 0.000 description 4
- 101100464304 Caenorhabditis elegans plk-3 gene Proteins 0.000 description 4
- 101100093534 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RPS1B gene Proteins 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
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- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses a variable-frequency control system for a rotary electrode type electric precipitator. The variable-frequency control system comprises a rotary motor and a frequency converter control box. A frequency converter and a PLC (programmable logic controller) are arranged in the frequency converter control box, and the frequency converter is connected with the PLC which is further connected with an ash hopper elevated level indicator. The variable-frequency control system for the rotary electrode type electric precipitator has the advantages that overload, overcurrent and underload basic protection of the rotary motor is realized by the frequency converter, and other auxiliary protections such as block rotation, short circuit, motor open phase, power open phase and operation limit values can be provided, broken link is effectively prevented, broken link protection and motor shaft breakage protection are realized, and the expected objective of safety operation of equipment is achieved.
Description
Technical field
The utility model relates to rotating electrode type electric cleaner frequency-changing control system.
Background technology
The rotating electrode type electric cleaner adopts the deashing that is arranged in the ash bucket to brush the purge mode of dust on the pole plate; Anti-corona and vibration dust-cleaning that effective solution high resistivity dust causes cause problems such as reentrainment of dust; Thereby increasing substantially efficiency of dust collection, is one of effective ways of breaking through at present conventional electric cleaner technical bottleneck.But at present in the rotating electrode type electric cleaner electric rotating machine is not had overload, overcurrent and underload basic protection, occur stuck easily and cause chain fracture, the normal safe operation of the equipment that influences.
The utility model content
The purpose of the utility model is to provide rotating electrode type electric cleaner frequency-changing control system, can effectively solve the stuck easily problem that causes the chain fracture of electric rotating machine.
In order to solve the problems of the technologies described above; The utility model is realized through following technical scheme: rotating electrode type electric cleaner frequency-changing control system; Comprise electric rotating machine, Frequency Converter Control case; Be provided with frequency converter and PLC in the said Frequency Converter Control case, said frequency converter links to each other with PLC, and said PLC also is connected with ash bucket high charge level meter.
Preferably, said PLC also is connected with encoder; Realization chain rupture protection.
Preferably, said PLC also is connected with host computer; Convenient control PLC can assign or change directive.
Compared with prior art; The utility model has the advantages that: frequency converter has been realized overload, overcurrent and the underload basic protection of electric rotating machine; And some other auxiliary protection can be provided, like stall, short circuit, motor phase shortage and power supply phase shortage, operating limit value, effectively realized the prevention chain rupture; Chain rupture protection and shaft break of motor are protected, and have realized the re-set target of equipment safety operation.
Description of drawings
Fig. 1 is the structural representation of the utility model rotating electrode type electric cleaner frequency-changing control system.
The specific embodiment
Consult the embodiment of Fig. 1 for the utility model rotating electrode type electric cleaner frequency-changing control system; Rotating electrode type electric cleaner frequency-changing control system; Comprise electric rotating machine 6, Frequency Converter Control case 1, be provided with frequency converter 3 and PLC2 in the said Frequency Converter Control case 1, said frequency converter 3 links to each other with PLC2; Said PLC2 also is connected with ash bucket high charge level meter 5, and said PLC2 also is connected with encoder 4 and host computer 7.Also be connected with input power supply and deashing motor 8 on the VFC case 1, deashing motor 8 is by realizing basic electic protection by moulding shell short-circuiting device+contactor+electrothermal relay protection loop.
For the prevention chain rupture, the alarm signal of using the overload of frequency converter to add overcurrent protection, ash bucket high charge level meter realizes, thereby makes the chain of driven rotary pole plate stressed excessive when the too high rotation pole plate that may touch in ash bucket ash position, strengthened the danger of chain rupture; And frequency converter overload or overcurrent are also because of stressed excessive the causing of driving chain, so through these two kinds of purposes that protection realizes preventing chain rupture.
Protect for chain rupture; Using frequency converter to add the combination that encoder adds PLC realizes; When driving chain ruptures, frequency converter meeting undercurrent or overload-alarm, the rotating speed of this external driven sprocket axle can reduce; The reduction of this rotating speed is sent to PLC through encoder, thereby through sending fault-signal fast with the rotating speed contrast of frequency converter and shutting down.Because the rotating speed of drive sprocket is lower, general per minute one changes, and common speed measuring device is difficult to measure accurately the speed of drive sprocket, so the high-precision instrument that need use encoder or be equal to.
For shaft break of motor protection, it is underload frequency converter then to occur like the drive sprocket axle fracture, and frequency converter can be realized protection, and the driven sprocket rotating speed reduces until stopping, and encoder can be realized protection.Like the driven sprocket axle fracture, the frequency converter overload then possibly appear, and driven chain wheel shaft rotating speed significantly reduces even stops, and encoder can be realized protection.
The above is merely the specific embodiment of the utility model; But the technical characterictic of the utility model is not limited thereto; Any those skilled in the art is in the field of the utility model, and variation of being done or modification all are encompassed among the claim of the utility model.
Claims (3)
1. rotating electrode type electric cleaner frequency-changing control system; Comprise electric rotating machine (6); It is characterized in that: also comprise Frequency Converter Control case (1); Be provided with frequency converter (3) and PLC (2) in the said Frequency Converter Control case (1), said frequency converter (3) links to each other with PLC (2), and said PLC (2) also is connected with ash bucket high charge level meter (5).
2. rotating electrode type electric cleaner frequency-changing control system as claimed in claim 1 is characterized in that: said PLC (2) also is connected with encoder (4).
3. rotating electrode type electric cleaner frequency-changing control system as claimed in claim 1 is characterized in that: said PLC (2) also is connected with host computer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200870561U CN202497944U (en) | 2012-03-09 | 2012-03-09 | Variable-frequency control system for rotary electrode type electric precipitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200870561U CN202497944U (en) | 2012-03-09 | 2012-03-09 | Variable-frequency control system for rotary electrode type electric precipitator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202497944U true CN202497944U (en) | 2012-10-24 |
Family
ID=47034572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200870561U Expired - Lifetime CN202497944U (en) | 2012-03-09 | 2012-03-09 | Variable-frequency control system for rotary electrode type electric precipitator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202497944U (en) |
-
2012
- 2012-03-09 CN CN2012200870561U patent/CN202497944U/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 | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |