CN2181996Y - Over-voltage and over-current protection high voltage electrostatic duster - Google Patents
Over-voltage and over-current protection high voltage electrostatic duster Download PDFInfo
- Publication number
- CN2181996Y CN2181996Y CN 93217467 CN93217467U CN2181996Y CN 2181996 Y CN2181996 Y CN 2181996Y CN 93217467 CN93217467 CN 93217467 CN 93217467 U CN93217467 U CN 93217467U CN 2181996 Y CN2181996 Y CN 2181996Y
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- China
- Prior art keywords
- voltage
- rectification
- over
- wave filter
- circuit
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- 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 belongs to the technical field of high tension electrostatic dust remover. The high tension electrostatic dust remover is provided with an over voltage over current protection circuit device which is arranged among a rectification inverter, a wave filtering inverter and a DC-AC inverter. The utility model slickly combines an over voltage sampling circuit and an over current sampling circuit together. The over voltage sampling circuit and the over current sampling circuit jointly use an execution circuit, and is used in a high voltage electrostatic generator circuit. Protection circuits has sensitive, rapid and reliable actions, and can decline fault losing to minimum.
Description
The utility model belongs to the high-voltage electrostatic dust separator technical field.
High-voltage electrostatic dust separator provides high-voltage DC power supply by HV generator, collects flue dust by the control of dust tube.High voltage direct current is connected to the corona wire in the control of dust tube, makes between corona wire and the control of dust barrel and forms high voltage electric field, produces the corona discharge phenomenon, makes gas ionization.When ash-laden gas passed through electric field, grit in the air-flow and ion collision were and charged, and they are under the effect of electric field force, and positively charged grit is drawn onto on the corona wire, and electronegative grit is adsorbed onto on the control of dust barrel, lost simultaneously electrically.By means of the plate vibrator and the electromagnetic vibrator that links to each other with corona wire that are contained on the control of dust tube, make it timing jitter then, grit is come off, fall in the ash bucket.
As shown in Figure 1, the high-pressure electrostatic that electric box (2) produces causes the interior corona wire of control of dust tube (1) body by high-voltage cable (3).
As shown in Figure 2, be the high-voltage electrostatic dust separator circuit block diagram, the 220V AC power through pressure regulator (4), transformer (5), rectification, wave filter (6), become DC low-voltage, pass through DC-AC (DC-AC) inverter (8) again low-voltage direct is become the high-frequency and high-voltage alternating current, pass through the direct current that voltage-doubler rectifier (9) becomes high voltage (100KV), low current (10MA) then.Between rectification, wave filter (6) and DC-AC inverter (8), be provided with circuit protection device (7).Circuit protection device (7) is powered by auxiliary constant voltage dc source, and this dc source is made up of 220V alternating current, transformer (10), rectification, voltage-stablizer (11).
The circuit protection device of existing high-voltage electrostatic dust separator (7) is an overcurrent protection; because circuit overcurrent protection is only arranged; in case circuit breaks down; when particularly causing that owing to load open circuit the unexpected rising of voltage substantially exceeds safety value; circuit overcurrent protection does not work; only other device failure can be caused further and when the overcurrent phenomenon occurring; circuit overcurrent protection could move; but overvoltage has formerly caused the damage of electrical part; so it can not carry out overvoltage protection, this is a serious defective.
The purpose of this utility model is at above-mentioned defective, and a high-voltage electrostatic dust separator with overcurrent overvoltage protection is provided.
The utility model comprises the control of dust tube, be assembled in order is connected in the electric box pressure regulator, transformer, rectification, wave filter, circuit protection device, DC-AC inverter, voltage-doubler rectifier, from voltage-doubler rectifier cause high-tension cable in the control of dust tube, to the auxiliary constant voltage dc source of circuit protection device power supply (above be prior art), it is characterized in that described circuit protection device is the overvoltage overcurrent protection.The sample circuit of overcurrent and superpotential sample circuit are combined, and use an executive circuit jointly.As seen the overcurrent overvoltage protection created of the utility model is not with existing overcurrent protection and the simple amalgamation of overvoltage protection, but creationary with both combinations cleverly, is used for the circuit protection of high-voltage electrostatic dust separator.
The utlity model has that the high-pressure electrostatic circuit protection is active in one's movements, reliable and secure advantage.
By embodiment the utility model is done detailed explanation below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of high-voltage electrostatic dust separator
Fig. 2 is the high-voltage electrostatic dust separator circuit block diagram
Be depicted as overvoltage circuit overcurrent protection figure of the present utility model in Fig. 2 dashed rectangle
The utility model comprises control of dust tube (1); be assembled in electric box (2) and (see Fig. 1; the pressure regulator (4) that order is connected Fig. 2); transformer (5); rectification; wave filter (6); circuit protection device (7); DC-AC inverter (8); voltage-doubler rectifier (9); cause the interior high-tension cable (3) of control of dust tube (1) from voltage-doubler rectifier (9); auxiliary constant voltage dc source to circuit protection device (7) power supply; described dc source is by transformer (10); rectification; voltage-stablizer (11) is formed; it is characterized in that described circuit protection device (7) is the overvoltage overcurrent protection, it connects to form (seeing Fig. 2 dashed rectangle) by following mode: the overvoltage sample circuit is by crystal voltage-stabiliser tube DZ
1And resistance R
1Be connected across after the series connection between just (Vd+) of rectification, wave filter (6) and negative (Vd-) utmost point and form, from DZ
1With R
1Interface pass through resistance R
2Be connected to transistor BG
1Base stage, BG
1Emitter stage connect the negative pole (vd-) of described rectification, wave filter (6), BG
1Colelctor electrode be connected on resistance R
3With voltage-stabiliser tube DE
2Interface, R
3With DZ
2Series connection, after the series connection, R
3The Ve end of the described rectification of a termination, voltage-stablizer (11), DZ
2A termination rectification, the negative terminal (Vd-) of wave filter (6), R
3With DZ
2Contact receive transistor BG by potentiometer RW
2Base stage, BG
2Grounded emitter, BG
2Colelctor electrode receive described rectification, voltage-stablizer (11) Ve end by the line bag of relay J, the shunt resistance r of ammeter A is connected on DZ
2And BG
2Between the emitter stage.
Say overcurrent protection operation principle earlier.The shunt resistance r of ammeter A is the overcurrent protection sampling resistor, produces voltage drop when load current passes through r, with voltage-stabiliser tube DZ
2Forward drop relatively, get the two difference and control transistor BG
2Conducting cross and end.Electric current just often, the voltage drop on the r is less, transistor BG
2Be in saturated and conducting state, relay J adhesive, circuit operate as normal.When load current arrives the overcurrent protection rated value greatly, BG
2End, relay J discharges, and with the 220V Ac Dump, makes the whole system outage, thereby reaches the purpose of overcurrent protection.
Retell the former operation principle of overvoltage protection.By voltage-stabiliser tube DZ
1And resistance R
1Series connection is sampled to the magnitude of voltage at rectification, wave filter (6) two ends (Vd+, Vd-), when voltage during less than the overvoltage protection value, and DZ
1End, the circuit operate as normal, in case when voltage meets or exceeds the protection value, DZ
1Path makes transistor BG
1Conducting, BG
2End, relay J discharges, and cuts off the electricity supply automatically, reaches the purpose of overvoltage protection.
Claims (1)
1; a kind of over-voltage over-current protection high-voltage electrostatic dust separator; it comprises control of dust tube (1); be assembled in the pressure regulator (4) that order is connected in the electric box (2); transformer (5); rectification; wave filter (6); circuit protection device (7); DC-AC inverter (8); voltage-doubler rectifier (9); cause the interior high-tension cable (3) of control of dust tube (1) from voltage-doubler rectifier (9); transformer (10) to circuit protection device (7) power supply; rectification; voltage-stablizer (11); it is characterized in that; described circuit protection device (7) is the overvoltage overcurrent protection, and it connects to form by following mode:
1) crystal voltage-stabiliser tube DZ
1And resistance R
1Be connected across the just (V of rectification, wave filter (6) after the series connection
d+) and negative (V
d-) between the utmost point;
2) DZ
1With R
1Interface pass through resistance R
2Be connected to transistor BG
1Base stage, BG
1Emitter stage connect the negative pole (Vd-) of described rectification, wave filter (6), BG
1Colelctor electrode be connected on resistance R
3With voltage-stabiliser tube DZ
2Interface;
3) R
3With DZ
2After the series connection, R
3The Ve end of a termination rectification, voltage-stablizer (11), DZ
2A termination rectification, the negative terminal (Vd-) of wave filter (6);
4) R
3With DZ
2Contact receive transistor BG by potentiometer RW
2Base stage, BG
2Grounded emitter, BG
2Colelctor electrode receive the V of rectification, voltage-stablizer (11) by the line bag of relay J
eEnd;
5) the shunt resistance r of ammeter A is connected on DZ
2And BG
2Between the emitter stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93217467 CN2181996Y (en) | 1993-07-06 | 1993-07-06 | Over-voltage and over-current protection high voltage electrostatic duster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93217467 CN2181996Y (en) | 1993-07-06 | 1993-07-06 | Over-voltage and over-current protection high voltage electrostatic duster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2181996Y true CN2181996Y (en) | 1994-11-09 |
Family
ID=33797392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93217467 Expired - Fee Related CN2181996Y (en) | 1993-07-06 | 1993-07-06 | Over-voltage and over-current protection high voltage electrostatic duster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2181996Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101491744B (en) * | 2008-01-21 | 2012-12-26 | 贵阳铝镁设计研究院有限公司 | Local control method of bag filter and used power distribution control cabinet |
| CN104174490A (en) * | 2014-08-14 | 2014-12-03 | 东南大学 | Liquid collecting device of heat source tower based on high-voltage static electricity |
| CN106040433A (en) * | 2016-06-27 | 2016-10-26 | 广东古帆装饰工程有限公司 | Improved electrostatic dust removal device |
| CN108879615A (en) * | 2018-07-11 | 2018-11-23 | 佛山市众盈电子有限公司 | A kind of current foldback circuit |
-
1993
- 1993-07-06 CN CN 93217467 patent/CN2181996Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101491744B (en) * | 2008-01-21 | 2012-12-26 | 贵阳铝镁设计研究院有限公司 | Local control method of bag filter and used power distribution control cabinet |
| CN104174490A (en) * | 2014-08-14 | 2014-12-03 | 东南大学 | Liquid collecting device of heat source tower based on high-voltage static electricity |
| CN104174490B (en) * | 2014-08-14 | 2016-09-14 | 东南大学 | Heat source tower based on high-pressure electrostatic receives liquid device |
| CN106040433A (en) * | 2016-06-27 | 2016-10-26 | 广东古帆装饰工程有限公司 | Improved electrostatic dust removal device |
| CN108879615A (en) * | 2018-07-11 | 2018-11-23 | 佛山市众盈电子有限公司 | A kind of current foldback circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |