CN201120320Y - Arc discharge of limitation electrostatic dust collector and arc discharge counting limitation circuit - Google Patents
Arc discharge of limitation electrostatic dust collector and arc discharge counting limitation circuit Download PDFInfo
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- CN201120320Y CN201120320Y CNU2007201281845U CN200720128184U CN201120320Y CN 201120320 Y CN201120320 Y CN 201120320Y CN U2007201281845 U CNU2007201281845 U CN U2007201281845U CN 200720128184 U CN200720128184 U CN 200720128184U CN 201120320 Y CN201120320 Y CN 201120320Y
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Abstract
The utility model relates to an arc discharge and arc discharge count limiter circuit for an electrostatic dust collector; more specifically, the limiter circuit is a protection circuit which can detect over-current and make repeated cutting-off and restoration movement in the case of arc discharge; when the cutting-off time reaches a preset limit time, the circuit can completely cut off the high voltage. When a dust collecting plate of the electrostatic dust collector fails or has an abnormal high-voltage circuit, the protection circuit can completely cut off redundant arc to prevent fire, and give timely notice in case of product abnormity.
Description
Technical field
The present invention relates to a kind of industrial precipitator high-tension circuit; Be more specifically when electric arc takes place, but detection of excessive current and repeated cutting, recovery action, when breaks reach the limited number of times of having set, the thorough holding circuit of cutoff high.
The collecting plate of precipitator can thoroughly cut off to prevent too much electric arc, fire preventing, and the holding circuit that can in time notify when product is unusual breaking down or high-tension circuit when unusual.
Background technology
Usually, industry facility and need the facility of peace and quiet environment can use the equipment of various adjusting air.In the said equipment, a kind of corona discharge that utilizes is arranged, the precipitator of the suspended particulate in the absorbed air.
The collecting plate of precipitator is connecting dc high-voltage with equal equidistant parallel arranged between collecting plate and the high-field electrode.The air that is inhaled into after the physical filtering by first level, is removed bigger particle, and the trickle thing of from the physical filtering process, slipping, on charged device, be converted to negative electrical charge, and when the dust collecting part the adsorbable above-mentioned charged fine thing of collecting plate, discharge cleaned air passes.
Above-mentioned precipitator utilizes dc high voltage, and the alternating voltage commonly used of input is changed, boosting is dc high-voltage, and is furnished with and can controls the inhibition circuit of high-tension electricity according to load condition.
Be dust catching efficiency and security consideration, the inhibition circuit of above-mentioned precipitator is furnished with holding circuit.
When the protection action of above-mentioned holding circuit is too responsive, increase the breaks of high pressure output, cause whole dust catching efficiency to descend; When heavy or Capacity Ratio load (precipitator) were too small, its residual capacity produced a large amount of electric arc, has disaster hidden-trouble.
Because of above-mentioned electric arc can cause spark: be simple electric arc no longer just at this moment, will follow spark when electric arc is excessive, cause the trickle thing of collecting plate on fire, have disaster hidden-trouble.
Therefore, the action of holding circuit will be satisfied fire preventing simultaneously and strengthen effective control of dust---these two opposite purposes.
Once announced high voltage supply arrangement as shown in Figure 1, traditional.
High voltage supply arrangement shown in Figure 1 constitutes: when voltage stabilizing (AVR) function and excess load, cut off the function that high voltage is supplied with.
The formation of its voltage stabilizing (AVR) function: input AC power commonly used, the filter house (10) of removing noise,
Make the alternating voltage that filters power be converted to the rectification part of DC voltage,
The DC voltage of rectification is boosted is the high-tension transformer (30) of high pressure,
Make two voltage portions (40) of high-tension transformer power boost,
High pressure after can obtaining to boost by two voltage portions (40), and make above-mentioned filter house (10) power be converted into the inhibition power supply unit (50) that suppresses power supply for suppressing above-mentioned high-voltage power,
By sensing, make the high-voltage power of two voltage portions form the feedback inhibition portion (60) that suppresses signal,
Detect voltage signal by feedback inhibition portion (60), and voltage signal is connected with PWM suppressing portion (70),, can keep the certain power voltage levvl, form voltage stabilizing function by high-tension transformer (30).
During its excess load, cut off the function formation that high voltage is supplied with: in high-tension transformer (30), utilize current transformer or resistance, but form the unusual overcurrent test section (80) of detection of excessive current, be connected with said PWM suppressing portion (70), the power level that suppresses pwm signal, the driving of cutoff high transformer (30), and then cut off the high voltage that causes because of excess load and supply with.
According to above-mentioned conventional art, the normalized current of detection of excessive current descend because of the trickle thing of dust arrester causes insulating resistance value, and electric current increases.Take into full account the generation of above-mentioned situation, necessity leaves the space during design, has the shortcoming that can not in time suppress when producing electric arc; Because of unnecessary current setting value, also to form electric current to its unnecessary current setting value and rise, the overcurrent signal of overcurrent test section (80) is cut off by PWM suppressing portion (70).Before,, can both produce electric arc (spark), have the shortcoming that causes fire by the electric current that high-tension transformer (30) can be passed on to greatest extent.
Summary of the invention
The present invention relates to the high-tension circuit design of industrial precipitator.Specifically, when producing electric arc, detect a side time detected value and the electric current by two sides time load and cut off, prevent to produce excessive holding circuit action, improve dust catching efficiency, can prevent the generation of electric arc simultaneously, fire preventing is a purpose; With first and second holding circuit of detecting electric arc and excess load electric current is component part; The electric arc of precipitator and circuit overcurrent protection.
The present invention has proposed a kind of arc discharge and arc discharge count restrictions circuit of limit static dust arrester for solving the problem that above-mentioned conventional art exists.
The purpose of this invention is to provide a kind of holding circuit, it can be from the unusual frequent electric arc that produces of collecting plate or from short circuit (SHORT), the protection product; Can prevent the fire that causes because of excessive electric arc; And when dust catching efficiency descends, can predict the consumer in advance.
Clearer and more definite; be when power is unusual; cut off internal electric source with relay (RELAY); and then rupturing duty voltage; breaks to inner power supply relay begin counting; when reaching certain number of times (setting value) within a certain period of time, can cut off internal electric source fully, excess electric arc and short circuit are formed the precipitator of stable protection and provide holding circuit from the electric arc of precipitator and overcurrent, damage of product, fire.
For embodying above-mentioned purpose, the present invention includes:
Input AC power commonly used, the filter house of removing noise;
The rectification part of transcoding filter power;
The DC voltage of rectification boosted be the high-tension transformer of high pressure;
Obtain the high pressure that boosts by two voltage portion, and, make above-mentioned filter house power form the internal electric source portion that suppresses power supply for suppressing above-mentioned high-voltage power with the high-tension transformer power boost;
The high-voltage power of two voltage portion forms the control part that suppresses signal by sensing;
By overcurrent test section and the detected voltage signal of utilization, carry out the internal electric source relay portion that internal electric source cuts off action;
Detect builtin voltage, the shutoff signal generating unit of output count signal;
From shutoff signal generating unit received signal, the count signal portion that begins to count;
From count signal portion received signal, carry out the complete block system relay drive division that cuts off action fully;
By the effect of complete block system relay drive division, carry out the complete block system relay portion that cuts off action fully;
Internal electric source relay portion by above-mentioned overcurrent test section action;
Complete block system relay portion by the action of complete block system relay drive division; And
Apply the complete block system relay drive division of action to count signal portion.
The advantage of the present invention and prior art is to have with lower member:
Can eliminate the filter house (10) of the alternating voltage ripple commonly used that is transfused to;
Alternating voltage after rectifiable is filtered, and be supplied in the rectification part (20) of high-tension transformer;
Can form the internal electric source portion (50) that suppresses voltage;
According to PWM control, the DC voltage rising by rectification is the high-tension transformer (30) of high-tension electricity;
Two voltage amplification high-tension transformer power, and to two voltage portions (40) of collecting plate output;
When producing electric arc, detection of excessive current and voltage are controlled the electric arc and the circuit overcurrent protection of the common precipitator of the control part (60) of above-mentioned high-tension transformer power and inhibition high-tension transformer;
Its formation comprises:
The abnormal voltage of the high-tension transformer primary side that detection causes because of electric arc and the overcurrent of secondary power take place when unusual, detectable overcurrent test section (80);
Internal electric source portion (50) to internal circuit supply power supply;
With the driver (DRIVER) of control part (60), drive the inverter part (70) of high-tension transformer portion (30);
Above-mentioned overcurrent test section (80) can be closed internal electric source when sending abnormal signal, and the internal electric source relay portion (101) of breaking arc discharge simultaneously and overcurrent;
After power supply relay portion receives cut-out and restoring signal internally, make arc discharge be converted to the count signal portion (104) of remote control counting (C-CLK);
When count pick up signal (D) also reaches the counts of having set within a certain period of time, can produce the shutoff signal generating unit (103) of complete shutoff signal;
Drive the complete block system relay drive division (105) of complete block system relay portion (102) with shutoff signal (E).
Description of drawings
To find out other purposes of the present invention, feature and advantage apparently referring to the following drawings from the description of the following embodiment of the present invention, accompanying drawing is:
Fig. 1 is the inhibition circuit structure diagram of conventional electrostatic dust arrester.
Fig. 2,3,4 is the inhibition circuit diagram of precipitator of the present invention.
Fig. 5 is the sequential chart of each group formation of explanation course of action of the present invention.
The symbol description of design drawing major part:
101: internal electric source relay portion
102: complete block system relay portion
103: the shutoff signal generating unit
104: count signal portion
105: complete block system relay drive division
The specific embodiment
With reference to following design drawing, specify technology of the present invention and constitute as annex.
By: input alternating voltage commonly used, the filter house (10) of removing noise,
The alternating voltage that filters power is converted to the rectification part (20) of DC voltage,
The DC voltage of rectification boosted is the high-tension transformer (30) of high pressure,
Make two voltage portions (40) of high-tension transformer power boost, the high pressure after can obtaining to boost.
For suppressing above-mentioned high-voltage power, by:
Make above-mentioned filter house (10) power form the internal electric source portion (50) that suppresses power supply;
The high-voltage power of two voltage portions (40) forms the control part (60) that suppresses signal and drive phase inverter (INVERTER) portion (70) by sensing; The overcurrent test section (80) of detection power electric voltage exception, as when detecting abnormal signal, drive internal electric source relay portion (101), cut off action.
At this, behind the certain hour, will finish and recover action excessively by the restoring circuit in the overcurrent test section (80).
Also have, the shutoff signal of internal electric source relay portion (101) enters count signal portion (104) nor gate (NORGATE) (1, No. 2 pin of U107) by 12V, V time (VTIME) line.At this,, remove No. the 1st relay tremble (Chattering) by nor gate U107, U108; By NAND gate (NANDGATE) U109, U110, the 2nd full scale clearance trembled and noise, and produces block system relay counting C_CLK.
Above-mentioned C_CLK is transfused to the counting U106 Clock of shutoff signal portion (103).
At the timing circuit U102 of shutoff signal generating unit (103), the signal by astable multivibrator sends through counting U103, U104, forms macrocyclic square wave (more than 1 minute).
This square wave is imported into the RST of U105, U106 counting, C_CLK in setting-up time (breaks) counting reaches setting value (J3: when the both sides of pin are connected, it connects pin will become counts) in, formation is resetted (RESET), restart counting (C_CLK).
As a reference, counting does not at this moment comprise the counting (C_CLK) in resetting time, but this does not need accurate action, therefore can ignore.
At this, setting-up time inside counting number of times is during more than set point number, by pin in the J3 short circuit, JMP-T forms the High value and is transfused to complete block system relay drive division (105), TR Q104, Q105 begin action, the relay (K1) of the relay (K3) of block system relay (102) portion and internal electric source relay portion (101) also begins action fully, finishes and cuts off action fully.
The programme diagram of foregoing as shown in Figure 5.
As mentioned above; circuit of the present invention has when taking place unusual in collecting plate and the product or clearing up improper causing when unusual; can cut off fully; protect damage of product and prevent that fire from taking place; and pass on abnormal signal to the consumer by outside contact point; guarantee safety and prolong the product operating period, simultaneously the advantage that provides protection to the electric arc and the overcurrent of precipitator.
Claims (2)
1. the arc discharge of a limit static dust arrester and arc discharge count restrictions circuit comprise:
Input AC power commonly used, the filter house of removing noise;
The rectification part of transcoding filter power;
The DC voltage of rectification boosted be the high-tension transformer of high pressure;
Obtain the high pressure that boosts by two voltage portion, and, make above-mentioned filter house power form the internal electric source portion that suppresses power supply for suppressing above-mentioned high-voltage power with the high-tension transformer power boost;
The high-voltage power of two voltage portion forms the control part that suppresses signal by sensing;
By overcurrent test section and the detected voltage signal of utilization, carry out the internal electric source relay portion that internal electric source cuts off action;
Detect builtin voltage, the shutoff signal generating unit of output count signal;
From shutoff signal generating unit received signal, the count signal portion that begins to count;
From count signal portion received signal, carry out the complete block system relay drive division that cuts off action fully;
By the effect of complete block system relay drive division, carry out the complete block system relay portion that cuts off action fully;
Internal electric source relay portion by above-mentioned overcurrent test section action;
Complete block system relay portion by the action of complete block system relay drive division; And
Apply the complete block system relay drive division of action to count signal portion.
2. the arc discharge of limit static dust arrester as claimed in claim 1 and arc discharge count restrictions circuit is characterized in that also comprising:
Receive the signal of internal electric source relay portion, produce the count signal portion (104) of count signal C_CLK;
The signal of count pick up signal section produces the shutoff signal generating unit of complete shutoff signal JMP-T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201281845U CN201120320Y (en) | 2007-07-24 | 2007-07-24 | Arc discharge of limitation electrostatic dust collector and arc discharge counting limitation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201281845U CN201120320Y (en) | 2007-07-24 | 2007-07-24 | Arc discharge of limitation electrostatic dust collector and arc discharge counting limitation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201120320Y true CN201120320Y (en) | 2008-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201281845U Expired - Fee Related CN201120320Y (en) | 2007-07-24 | 2007-07-24 | Arc discharge of limitation electrostatic dust collector and arc discharge counting limitation circuit |
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| CN (1) | CN201120320Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810974A (en) * | 2015-05-14 | 2015-07-29 | 成都中冶节能环保工程有限公司 | Eliminating type coke oven afterheat power generating system based on voltage boosting power supply circuit |
| CN104836376A (en) * | 2015-05-15 | 2015-08-12 | 成都中冶节能环保工程有限公司 | Thermal sensitive type coke oven waste heat power generation system based on boost power supply circuit |
| CN106532953A (en) * | 2016-12-08 | 2017-03-22 | 北京融安特智能科技股份有限公司 | High-voltage power supply with monitoring and communication functions, and use method |
-
2007
- 2007-07-24 CN CNU2007201281845U patent/CN201120320Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810974A (en) * | 2015-05-14 | 2015-07-29 | 成都中冶节能环保工程有限公司 | Eliminating type coke oven afterheat power generating system based on voltage boosting power supply circuit |
| CN104836376A (en) * | 2015-05-15 | 2015-08-12 | 成都中冶节能环保工程有限公司 | Thermal sensitive type coke oven waste heat power generation system based on boost power supply circuit |
| CN106532953A (en) * | 2016-12-08 | 2017-03-22 | 北京融安特智能科技股份有限公司 | High-voltage power supply with monitoring and communication functions, and use method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080924 |