CN2077754U - High voltage electrostatic generator with new protecting and controlling circuit - Google Patents
High voltage electrostatic generator with new protecting and controlling circuit Download PDFInfo
- Publication number
- CN2077754U CN2077754U CN 90216645 CN90216645U CN2077754U CN 2077754 U CN2077754 U CN 2077754U CN 90216645 CN90216645 CN 90216645 CN 90216645 U CN90216645 U CN 90216645U CN 2077754 U CN2077754 U CN 2077754U
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- high voltage
- voltage
- generator
- electrostatic generator
- short circuit
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Abstract
The utility model relates to a high voltage electrostatic generator for electrostatic powder-paint spraying equipment, which is suitable for all technical fields of power-paint spraying. This electrostatic generator comprises a direct current regulated power supply, a high frequency oscillation and a boost pressure, a direct current high voltage display and a short circuit automatic protection circuit. The generator provides a high voltage electrostatic generator with new protecting and controlling circuit which can solve the problems that discharging arc is happened when an airbrush with negative high voltage contacts with workpieces or touchs ground, and the high voltage electrostatic generator with new protecting and controlling circuit can directly reflect the magnitude of the high voltage or reflect whether the high voltage exists; when in use, safe of machine and people is ensured. Meanwhile, an output short circuit protection circuit is designed in order to prevent discharging arc and sparking; when the airbrush comes close to the workpieces and the ground, the electric voltage is automatically cut off, and the alarm is conducted simultaneously.
Description
What the present invention relates to is a kind of HV generator that is used for the electrostatic powder paint spraying technology, is applicable to all powder lacquer spraying technology fields.
The existing HV generator that is used for powder lacquer spraying, all by D.C. regulated power supply, the higher-order of oscillation and high frequency boost, high direct voltage generator, high direct voltage indication four major parts form.Owing in the operating process of electrostatic powder paint spraying, usually have the spray gun contact workpiece of several ten thousand volt negative high voltages or bump ground, cause for this reason and put arc in a large number, produce spark, to cause spray room breaking out of fire, production and personal safety all do not have to guarantee.Another is existing HV generator, all can not directly show the size of negative high voltage, but the low pressure that adopts the higher-order of oscillation to produce is delivered to voltmeter through being rectified into dc low-voltage, equivalence indication negative high voltage size.When working properly at the high-frequency generator like this and high direct voltage generator back broke down the output of no high pressure, this equivalence indication still had high pressure output indication.
Task of the present invention provides and a kind ofly can solve the spray gun contact workpiece of band negative high voltage or bump ground and produce the problem put arc, can directly reflect negative high voltage size or the HV generator that has or not again.When electrostatic generator is worked, machine and personal safety are guaranteed.
The present invention compares with existing HV generator technology, has following characteristics:
At high-voltage output end (spray gun muzzle) more near workpiece or ground, the output high pressure can automatically reduce, the high-voltage digital display list shows that automatically high pressure reduces.
2. work as high-voltage output end (as the spray gun muzzle) contact workpiece or bump ground, the output high pressure can be reduced to zero automatically in instantaneous interruption, and making spray gun muzzle high pressure is zero, does not produce spark.
3. when distance shortened gradually between high-voltage output end (as the spray gun muzzle) and workpiece or the ground, the high-voltage digital indicated value reduced, and produced alarm signal when being reduced to certain value.
Fig. 1. functional-block diagram
Fig. 2. D.C. regulated power supply combinatorial principle figure
Fig. 3. high-frequency and high-voltage generator schematic diagram
Fig. 4. high direct voltage generator and output short circuit protection circuit schematic diagram
Fig. 5. high direct voltage display unit schematic diagram
Fig. 6. the control circuit schematic diagram is protected in short circuit automatically
Principle of the present invention exchanges 220 ˇ (50HZ) voltage and produces 0～36 ˇ adjustable dc voltage through rectifying and wave-filtering and mu balanced circuit as shown in Figure 1. DC voltage adds to high-frequency generator and produces high-frequency oscillation voltage. This high-frequency oscillation voltage produces the high frequency voltage of volt more than 10,000 through high-frequency step-up transformer. Become again 90,000 volts high direct voltage output through the high direct voltage generator. Change the size of DC voltage, can change the size of high-frequency oscillation voltage, thereby change the size of output dc voltage.
In order to prevent that spray gun from bumping when ground arcing, designed output short circuit protective device. It comprises that output short circuit protection resistance and short circuit protect control circuit automatically. When spray gun can cut off voltage, same alarm closely the time automatically.
The high direct voltage display unit adopts numeral to show high direct voltage, when spray gun closely the time, can show automatically that high pressure reduces.
Below in conjunction with accompanying drawing concrete enforcement masterpiece of the present invention is further described.
As shown in Figure 1, the novel high-pressure electrostatic generator that the present invention relates to is made up of following six major parts: control circuit is protected in D.C. regulated power supply combination, high-frequency and high-voltage generator, high direct voltage generator output short circuit protection circuit, high direct voltage display unit, short circuit automatically.
The D.C. regulated power supply combination: as shown in Figure 2, it is formed by exchanging fuse, power switch, two power transformers and three groups of rectifying and wave-filterings, direct current regulation circuits.It produces three groups of D.C. regulated power supplies: 0～36 ˇ is adjustable continuously, ± 15 ˇ.
The high-frequency and high-voltage generator: principle as shown in Figure 3, the high-frequency and high-voltage generator is made up of two 3DD15 high frequency transformers, line bag and resistance, electric capacity, adopt dc source voltage, after being 0～36 volt of continuous adjustable change supply voltage, can change the size of the higher-order of oscillation, the high frequency that is produced boosts to the high frequency voltage of volt more than 10,000 through high-frequency step-up transformer, delivers to the negative direct current high voltage generator.
High direct voltage generator, principle are made up of seven high pressure silicon bridges and seven high-voltage capacitances as shown in Figure 4, and voltage doubling rectifing circuit to high pressure silicon stack becomes the high-frequency and high-voltages of more than 10,000 volts to be the negative direct current high voltage up to 90,000 volts.
High direct voltage display unit, principle as shown in Figure 5, it is by high-voltage line bag, high voltage silicon rectifier stack D
1, high-voltage capacitance C
15, resistance R
12～R
16, capacitor C
22Form.According to voltage multiplying rectifier principle, high-voltage capacitance C
15On voltage be high direct voltage, it is all to export 1/7th of high direct voltage, resistance R
12～R
16Be divider resistance, suitably choose R
16, make at R
16On the voltage that takes off, the specific output voltage U
OutputDwindle 10000 times, then, U
R16Deliver to digital voltmeter, the voltage that shows on the digital voltmeter has just directly shown output voltage U
Output
Output short circuit protection circuit, principle as shown in Figure 4, it is by resistance R
8Form, the short-circuit protection principle is the rectification high-voltage output end, is equivalent to a load resistance that resistance is very big over the ground, when the spout of high-voltage output end during near workpiece or ground, is equivalent to the load resistance numeral and reduces, and load increases the weight of, and according to voltage divider principle, high direct voltage is fallen at R
8On pressure drop just increase, when spray gun muzzle contact workpiece or when bumping ground, being equivalent to the load resistance value is zero, the high direct voltage pressure drop is at R
8On, promptly the gun slot dc voltage value of output is reduced to zero volt, has played the short-circuit protection effect.
Control circuit is protected in short circuit automatically, principle as shown in Figure 6, by sampling resistor R
17, R
18, operational amplifier 1 and 2, comparator, driver, relay form, its operation principle is as follows: when spray gun during near workpiece or contact workpiece, sampling resistor R
17, R
18Last signal just increases, and amplifies through two-stage calculation, delivers to comparator.When signal voltage during greater than comparative voltage, comparator has output, through the driver drives actuating of relay, the dc source of high-frequency and high-voltage generator is disconnected, and makes high-frequency and high-voltage generator failure of oscillation, and no high direct voltage is exported, and has played automatic protective effect.Use audible alarm simultaneously, tell the operator that spray gun is left workpiece.
When spray gun at normalized distance from when work, sampling resistor R
17, R
18On signal little, this moment deliver to comparator signal voltage less than comparative voltage, the comparator no-output, relay is failure to actuate, high-frequency and high-voltage generator operate as normal is normally exported high direct voltage.Comparative voltage is adjustable continuously, can control the guard space size flexibly.
Claims (3)
1, a kind of HV generator, particularly a kind of HV generator that is used for powder lacquer spraying equipment, it is a kind of by resistance R to it is characterized in that this HV generator has adopted
17And R
18, the short circuit automatic protection circuit formed of amplifier 1 and 2, driver, relay.
2, according to the HV generator of claim 1, it is a kind of by R to it is characterized in that this HV generator has adopted
8The output short circuit protection circuit that equivalent resistance is formed.
3, according to claim 1,2 HV generator, it is characterized in that this HV generator has adopted by line bag, silicon stack D
1, capacitor C
15And C
22, resistance R
12～R
16The high direct voltage display unit of forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90216645 CN2077754U (en) | 1990-07-25 | 1990-07-25 | High voltage electrostatic generator with new protecting and controlling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90216645 CN2077754U (en) | 1990-07-25 | 1990-07-25 | High voltage electrostatic generator with new protecting and controlling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2077754U true CN2077754U (en) | 1991-05-29 |
Family
ID=4895766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90216645 Withdrawn CN2077754U (en) | 1990-07-25 | 1990-07-25 | High voltage electrostatic generator with new protecting and controlling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2077754U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431711C (en) * | 2004-02-08 | 2008-11-12 | 陶显芳 | Environmental protection electronic smoke exhaust ventilator and smoke electron absorption apparatus |
| CN102624256A (en) * | 2012-04-16 | 2012-08-01 | 南京化工职业技术学院 | High voltage static generator |
| CN101970125B (en) * | 2008-03-10 | 2013-04-24 | 伊利诺斯工具制品有限公司 | Circuit for displaying the relative voltage at the output electrode of an electrostatically aided coating material atomizer |
| CN103785573A (en) * | 2014-01-26 | 2014-05-14 | 魏强 | Electrostatic liquid spray gun ignition-prevention device |
-
1990
- 1990-07-25 CN CN 90216645 patent/CN2077754U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431711C (en) * | 2004-02-08 | 2008-11-12 | 陶显芳 | Environmental protection electronic smoke exhaust ventilator and smoke electron absorption apparatus |
| CN101970125B (en) * | 2008-03-10 | 2013-04-24 | 伊利诺斯工具制品有限公司 | Circuit for displaying the relative voltage at the output electrode of an electrostatically aided coating material atomizer |
| CN102624256A (en) * | 2012-04-16 | 2012-08-01 | 南京化工职业技术学院 | High voltage static generator |
| CN103785573A (en) * | 2014-01-26 | 2014-05-14 | 魏强 | Electrostatic liquid spray gun ignition-prevention device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |