CN1511671A - Anti-shock protector of full electronic intelligent electric arc welder - Google Patents
Anti-shock protector of full electronic intelligent electric arc welder Download PDFInfo
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- CN1511671A CN1511671A CNA021595917A CN02159591A CN1511671A CN 1511671 A CN1511671 A CN 1511671A CN A021595917 A CNA021595917 A CN A021595917A CN 02159591 A CN02159591 A CN 02159591A CN 1511671 A CN1511671 A CN 1511671A
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- 230000001012 protector Effects 0.000 title abstract description 4
- 230000000703 anti-shock Effects 0.000 title abstract 2
- 238000010891 electric arc Methods 0.000 title 1
- 238000003466 welding Methods 0.000 claims abstract description 103
- 238000012360 testing method Methods 0.000 claims description 40
- 206010014405 Electrocution Diseases 0.000 claims description 9
- 238000001514 detection method Methods 0.000 description 12
- 238000007667 floating Methods 0.000 description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The electronic intelligent anti-shock protector for arc welder consists of mainly casing, electronic relay, leakage current detecting sensor, work signal detecting sensor, and control circuit board. The electronic relay, the leakage current detecting sensor and the work signal detecting sensor are connected serially in the power supply and the primary side of the arc welding transformer. The control circuit output is connected directly to the control end of the electronic relay, and the control circuit board controls the on-off of the electronic relay based on the work state of the arc welder. The present invention can lower the idle voltage in the secondary side automatically to avoid electric shock accident and restore the welding voltage automatically. The present invention is intelligent, high in reliability and high in safety, and has leakage protection, saving in energy and other advantages.
Description
Technical field
The present invention relates to a kind of be applied on the ac arc welder, monitoring electric welding machine electric leakage, prevent the full electronic intelligent electric arc-welding machine electrocution-proof protection device that gets an electric shock, it belongs to low-pressure electronic equipment product.
Background technology
Ac arc welder is a kind of low voltage electrical equipment commonly used, and extensive in sector applications such as building, metallurgy, machine-building, it is mainly used in the welding of ferrous materials.Be characterized in that the working time interruption is frequent, idle time is long.Arc welder is in order to guarantee to weld the requirement of striking, and arc welder need have higher striking voltage when unloaded, and about 70-80 volt is higher than safe voltage, after the human body contact, electric shock accidents takes place very easily; And energy consumption is bigger.Therefore, in order to prevent the human electric shock, arc welder should have secondary unloaded step-down protector or electrocution-proof protection device.Yet existing arc welder does not have these protective devices.
Summary of the invention
In order to solve the secondary protective device that lacks of arc welder; human electric shock's phenomenon easily takes place; and the big shortcoming of electric welder no-load energy consumption; the purpose of this invention is to provide a kind of full electronic intelligent electric arc-welding machine electrocution-proof protection device; it is installed on the arc welder can reduce the secondary floating voltage of arc welder effectively; and can when electric welding machine leaks electricity, disconnect current supply circuit, and prevent the human electric shock, reduce no-load power consumption.
For achieving the above object, the present invention takes following design: a kind of full electronic intelligent electric arc-welding machine electrocution-proof protection device, and it mainly is made of housing and the electronic relay, leakage current detecting sensor, working signal detecting sensor and the control circuit board that are arranged in the housing;
Described electronic relay, leakage current detecting sensor, working signal detecting sensor are connected in the arc welding transformer primary side loop of power supply and arc welder;
The control signal output of described control circuit board directly links to each other with the coil of described electronic relay; Described control circuit board is according to the conducting and the disconnection of the duty control electronic relay of arc welder.
Described control circuit board mainly is made of microprocessor, resistor voltage divider circuit, enabling signal testing circuit, working signal testing circuit, leakage current testing circuit and drive circuit;
Described resistor voltage divider circuit is connected in parallel on the two ends of described electronic relay;
The signal input part of described enabling signal testing circuit is in parallel with the primary side of electric welding machine arc welding transformer, its signal output part links to each other with the signal input part of microprocessor, microprocessor control signal output links to each other with the control end of described drive circuit, and the output of drive circuit directly links to each other with the control end of described electronic relay; The enabling signal testing circuit constantly detects electric welding machine arc welding transformer primary side voltage, after finding enabling signal, and the notice microprocessor, microprocessor makes the electronic relay conducting by drive circuit;
The signal input part of described working signal testing circuit links to each other with the signal output part of described working signal sensor in being connected on electric welding machine arc welding transformer primary side loop, its signal output part links to each other with the signal input part of microprocessor, microprocessor control signal output links to each other with the control end of described drive circuit, and the output of drive circuit directly links to each other with the control end of described electronic relay;
The signal input part of described leakage current testing circuit links to each other with the signal output part of described leakage current detecting sensor in being connected on electric welding machine arc welding transformer primary side loop, and its signal output part links to each other with the signal input part of described microprocessor and drive circuit; The output of described drive circuit directly links to each other with the control end of described electronic relay.
Described resistor voltage divider circuit mainly is made of divider resistance, and it is connected in parallel on welder power input electronic relay two ends.
Also connecting this buffer circuit of a buffer circuit before the signal input part of described enabling signal testing circuit mainly is made of switching tube, optocoupler; Control end of switching tube links to each other with described microprocessor control signal output in this buffer circuit, the signal output part of this switching tube links to each other with the signal input part of optocoupler, and the signal output part of optocoupler links to each other with the signal input part of described enabling signal testing circuit.
Can not reduce secondary floating voltage because the present invention has in the arc welder welding automatically when not carrying out, and when welding, can make voltage return to the function of the specified floating voltage of electric welding machine automatically; And, adopt up-to-date microprocessor detection technique, and in conjunction with the work characteristics of arc welding transformer, highly sensitive signal acquisition circuit, signal processing circuit on hardware, have been designed, on software, designed intelligentized logic judgment rule, so the present invention has the following advantages: 1, have intelligentized characteristics, can intelligence collection electric welder no-load running parameter, to be applicable to the ac arc welder of different model; 2, have high reliability, high security.Can when electric welding machine is not worked, floating voltage be reduced, be lower than the human safety voltage, return to the striking voltage value during work rapidly.3, has creepage protection function, electric welding machine reliable turn-off when guaranteeing electric leakage.4, has high energy saving.The experiment proved that behind adding the present invention, the power saving rate of electric welding machine is up to 98%.5, full electronic device.Because the present invention adopts the electronic type contact, does not have any mechanical contact, thereby, the reliability and the service life of having improved equipment.6, simple to operate, easy for installation.
Description of drawings
Fig. 1 is the annexation figure of the present invention and arc welder
Fig. 2 is circuit theory diagrams of the present invention
Fig. 3 is the physical circuit figure of microprocessor of the present invention
Fig. 4 is the physical circuit figure of enabling signal testing circuit of the present invention
Fig. 5 is buffer circuit physical circuit figure of the present invention
Fig. 6 is drive circuit physical circuit figure of the present invention
Fig. 7 is working signal testing circuit physical circuit figure of the present invention
Fig. 8 is electric-leakage detection circuit physical circuit figure of the present invention
Fig. 9 is stored in control program flow chart in the microprocessor for the present invention
The specific embodiment
Fig. 1 is the concrete annexation figure of the present invention and arc welder.As shown in the figure, during use, the present invention is serially connected between power supply and the arc welder arc welding transformer primary side, effect of the present invention is: 1, reduce the secondary floating voltage of arc welder.When arc welder is unloaded, secondary voltage is reduced to 1 volt automatically, prevent the human electric shock, energy savings.2, prevent the arc welder electric leakage.If arc welder electric leakage, the power supply of breaking arc welding machine immediately.
The present invention mainly is made of housing and the electronic relay 1, leakage current detecting sensor 2, working signal detecting sensor 3 and the control circuit board 4 that are arranged in the housing.
As shown in Figure 2, electronic relay 1, leakage current detecting sensor 2, working signal detecting sensor 3 are connected in the arc welding transformer primary side loop of power supply and arc welder.When electric welding machine is worked, electronic relay 1 conducting, the 380V power supply links to each other with arc welder, and for it provides working power, when electric welding machine quit work, electronic relay 1 disconnected, and the 380V power supply stops to be the electric welding machine power supply.
Resistor voltage divider circuit 42 is connected in parallel on the two ends of electronic relay 1.When arc welder is worked, electronic relay 1 conducting, arc welder directly links to each other with the 380V power supply; When arc welder quit work, electronic relay 1 disconnected, and 380V voltage links to each other with arc welder after resistor voltage divider circuit 42 step-downs.Because resistor voltage divider circuit 42 reduces arc welder arc welding transformer primary side voltage, so, the secondary floating voltage of arc welder is reduced, be lower than the human safety voltage.
The signal input part of enabling signal testing circuit 43 is in parallel with the primary side of electric welding machine arc welding transformer, its signal output part links to each other with the signal input part of microprocessor 41, the control signal output of microprocessor 41 links to each other with the control end of drive circuit 46, and the output of drive circuit 46 directly links to each other with electronic relay.Detect the signal of startup arc welder when enabling signal testing circuit 43 after, notify microprocessor immediately, microprocessor output control signal makes drive circuit 46 work, drives electronic relay 1 conducting, makes arc welder work.
The signal input part of working signal testing circuit 44 links to each other with the signal output part of working signal sensor 3 in being connected on electric welding machine arc welding transformer primary side loop, and its signal output part links to each other with the signal input part of microprocessor 41.The effect of working signal testing circuit 44 is: in the electric welding machine course of work, after welding rod left workpiece, working signal testing circuit 44 also need to judge whether to continue welding by the testing signal, and correspondingly controls the break-make of electronic relay.If also need to continue welding, working signal testing circuit 44 is with regard to output signal, and notice microprocessor 41, microprocessor 41 are exported control signals and made drive circuit 46 work, drive electronic relay 1 and continue conducting, and arc welder works on; Otherwise, electronic relay 1 is disconnected, cut off the electric welding machine working power.
The signal input part of leakage current testing circuit 45 links to each other with the signal output part of leakage current detecting sensor 2 in being connected on electric welding machine arc welding transformer primary side loop, and its signal output part links to each other with the signal input part of microprocessor 41 with drive circuit 46.After leakage current testing circuit 45 detected leakage current, output signal was notified microprocessor 41 on the one hand immediately, made drive circuit 46 work on the one hand, and electronic relay 1 is disconnected, and cut off the working power of electric welding machine.
In specific embodiments of the invention, resistor voltage divider circuit 42 mainly is made of the divider resistance of two 100k resistances, and they are connected in parallel on two electronic relay 1 two ends of welder power input respectively.When electric welding machine was in Light Condition, electronic relay 1 disconnected, and the 380V supply voltage links to each other with the primary side of electric welding machine arc welding transformer after the resistance step-down.Because the divider resistance in the resistor voltage divider circuit reduces the primary side voltage of arc welder, so making the secondary floating voltage of arc welder is 1 volt, well below the human safety voltage.
As shown in Figure 4, enabling signal testing circuit 43 mainly is made of operational amplifier U1, filter circuit U2 and optocoupler U3.The signal input part 2,3 of operational amplifier U1 is connected in parallel on electric welding machine arc welding transformer primary side through resistance R 1, R2, the signal output part of operational amplifier U1 links to each other with optocoupler U3 through filter circuit U2 (capacitor C 1, resistance R 7), and the signal output part of optocoupler U3 links to each other with the P1.1 (referring to shown in Figure 3) of microprocessor 41.
For the operational amplifier U1 in the enabling signal testing circuit is not damaged by high pressure.Before the signal input part of operational amplifier U1, also connect a buffer circuit.As shown in Figure 5, this buffer circuit mainly is made of triode U4, optocoupler U5, U6.The control end of buffer circuit links to each other with the control signal output P3.2 (referring to shown in Figure 3) of microprocessor 41, and 6 pin of optocoupler U5 connect an end of electric welding machine primary side, and 6 pin of optocoupler U6 connect the other end of electric welding machine primary side.4 pin of U5 connect the reverse input end of operational amplifier, and 4 pin of U6 connect the in-phase input end of operational amplifier.When electric welding machine was in Light Condition, control end drove triode U4 conducting, thereby makes optocoupler U5, U6 conducting, and the voltage at electric welding machine two ends is input to the operational amplifier two ends by optocoupler.When electric welding machine was worked, optocoupler ended, and operational amplifier and electric welding machine are kept apart, and had guaranteed that like this operational amplifier can not damaged by high pressure.
When unloaded, the voltage at electric welding machine primary side two ends is input to operational amplifier after isolating, differential amplification rear drive optocoupler conducting through operational amplifier U1, the square-wave signal of optocoupler output output certain width, whether microprocessor needs to weld by detecting and analyze this square wave, judging.This is according to behind the instantaneous contact workpiece of welding rod (it is secondary by short circuit to be equivalent to electric welding machine), the magnitude of voltage at electric welding machine primary side two ends reduces, this voltage driving force to optocoupler after the differential amplification of operational amplifier obviously reduces, the square-wave signal width of optocoupler output output sharply diminishes, logic by microprocessor 41 is judged, extract this enabling signal, thereby can safe and reliablely drive electronic relay 1 work by drive circuit 46.
As shown in Figure 6, drive circuit 46 mainly is made up of NAND gate U1, optocoupler U2.The input of NAND gate U1 links to each other with the signal output part of electric-leakage detection circuit 45, another signal input part of NAND gate links to each other with the control signal output P1.4 (referring to shown in Figure 3) of single-chip microcomputer, the signal output part of NAND gate links to each other with the negative pole of diode among the optocoupler U2, the positive pole of diode links to each other with power supply through resistance among the U2, directly the linking to each other with electronic relay 1 of the triode among the U2.To detect the output of electric leakage signal or microprocessor control end closed or when turn-offing the signal of electronic relay 1 when electric-leakage detection circuit, and the optocoupler U2 in the drive circuit 46 promptly can conducting or shutoff, thereby makes electronic relay 1 be in turned on or off.
In the arc welder course of work, welding rod will constantly contact with workpiece and disconnect.If welding rod disconnects electronic relay immediately once leaving workpiece, can have a strong impact on welding quality so.So the present invention has designed working signal testing circuit 44, after welding rod leaves workpiece, just disconnect electronic relay behind the time-delay certain hour.As shown in Figure 7, this working signal testing circuit 44 main optocoupler U1, monostable trigger U2 constitute.The signal input part of optocoupler U1 links to each other with the signal output part of working signal sensor 3 (annular electro Magnetic Sensor) in being connected on electric welding machine arc welding transformer primary side loop, the signal output part of optocoupler U1 links to each other with the signal input part 1B of monostable trigger U2, and the signal output part 1Q of U2 links to each other with the signal input part P3.7 of microprocessor 41 (referring to shown in Figure 3).
When electric welding machine is worked, after the optocoupler U1 shaping of signal process and isolation of 3 outputs of annular electro Magnetic Sensor, export a pulse signal, this pulse signal becomes a square-wave signal after nursing one's health through monostable trigger U2, be input to then in the microprocessor 41, microprocessor 41 is handled accordingly to this signal.Microprocessor 41 is according to working condition, and decision is to disconnect electronic relay or continue closed.After welding rod left workpiece, microprocessor 41 was by the testing signal, and judging whether needs to continue welding, and the break-make of control corresponding electronic relay.If also need welding, just continue to open relay, otherwise closed relay.
The signal input part of the present invention optocoupler U1 in working signal testing circuit 44 is serially connected with a potentiometer RW.Because the turn-on threshold voltage of optocoupler U1 is 0.9 volt, so can be input to the voltage swing at optocoupler U1 two ends by regulator potentiometer RW.When electric welding machine is worked, from the pulse signal driving optocoupler conducting of loop sensor output, from optocoupler output output signal.When electric welding machine quit work, this pulse signal was very little, failed to drive the optocoupler conducting, the output of optocoupler output no signal.From 2 pin of the received impulse signal monostable trigger 74LS221 of optocoupler output output, from the output of 13 pin be square-wave signal, this signal inserts microprocessor.Resistance R 1, capacitor C 1 can be used for regulating the width of square wave.
Leaky may appear in the electric welding machine course of work.In order to prevent the electric shock phenomenon, the present invention has also designed electric-leakage detection circuit.As shown in Figure 8, this electric-leakage detection circuit mainly is made of detection of electrical leakage special chip U1 (model M54123), controllable silicon SCR, optocoupler U3.The signal input part 1,2 of detection of electrical leakage special chip U1 links to each other with the signal output part of sensor for detecting electric leakage 2, the signal output part of U1 links to each other with the silicon controlled gate pole, the negative electrode of controllable silicon SCR links to each other with the signal input part of optocoupler U3, and the signal output part of U3 links to each other with the signal input part P1.2 (referring to shown in Figure 3) of microprocessor 41 and the control signal input of drive circuit 46.When sensor for detecting electric leakage 2 detects electric leakage signal, detection of electrical leakage special chip U1 exports control signal, make the controllable silicon SCR conducting, optocoupler U2 exports electric leakage signal, after microprocessor 41 detects this signal,, electronic relay 1 is disconnected immediately by drive circuit 46, the working power of breaking arc welding machine, and report to the police.
Fig. 9 is a control program flow chart of the present invention.As shown in the figure, after microprocessor 41 works on power, gather the relevant information of arc welder automatically.Judge whether electric welding machine leaks electricity, if the electric welding machine electric leakage disconnects electronic relay immediately, cut off the electric welding machine working power, and report to the police; Whether otherwise continuing to detect electric welding machine has enabling signal.If electric welding machine has enabling signal, microprocessor by drive circuit, makes the electronic relay conducting, electric welding machine work immediately; Otherwise microprocessor just constantly detects the state of electric welding machine by electric-leakage detection circuit and enabling signal testing circuit.After electric welding machine work, microprocessor constantly detects the duty of electric welding machine by the working signal testing circuit, if electric welding machine is in running order, then continue to make the electronic relay conducting, if stop welding, then turn-offs electronic relay.
The present invention has following characteristics:
1. intelligentized characteristics.The present invention is connected on input end of electric welding machine.After the energising, can collect initialization information automatically.This information is meant the secondary magnitude of voltage of the electric welding machine that is under the unloaded safe low pressure (being converted into the square-wave signal of respective width by isolating optocoupler), and at the electric welding machine of different model, microprocessor also can intelligence identifies unloaded safe voltage.
2. adopt resistance step-down mode, security and energy-saving effect are fairly obvious.The characteristics of maximum of the present invention are: after the divider resistance step-down, can make arc welder secondary side floating voltage be lower than 1 volt, can return to normal striking voltage 70-80 volt safely, reliably after obtaining same enabling signal.Like this, when arc welder was in Light Condition, the present invention had higher security than same device, and higher energy-saving effect.And the power that consumes on the resistance is extremely low, need not to add in addition in device radiator fan.
3. adopt operation amplifier circuit to detect enabling signal, in conjunction with anti-jamming circuit, make the detection sensitivity height, anti-interference is good.And the mode with data signal is input in the microprocessor, is convenient to logic judgement and processing.Because the stability of data signal and anti-interference, have guaranteed like this that electric welding machine can be because of unexpected interference false triggering than analog signal height.
4. adopt volume circlet shape electromagnetic sensor and signal conditioning circuit collecting work signal thereof, gather highly sensitively, and can filter interfering signal, guaranteed reliability and security.And the coiling of electromagnetic sensor is simple, and is easy to process.
5. adopt special-purpose electric-leakage detection circuit, turn-off electronic relay during electric leakage immediately.Guaranteed welder's personal safety.
6. lack start-up time, less than 0.02s.Be lower than and require the specification requirement of start-up time among " State Standard of the People's Republic of China " GB10235-2000 less than 0.06s.Thereby improved operating efficiency.
7. adopt the powerful logical process function of the work characteristics of welding and microprocessor is combined, make simple to operately, powerful, realized intellectuality, electronization, the miniaturization of installing.Solved the shortcoming that in the past inserts behind the protector the welding quality influence.
8. adopt the electronic relay of non-contact type, make improve greatly this novel reliability and service life.
The above is preferred embodiment of the present invention only, and protection scope of the present invention is not limited thereto.Anyly all belong within the protection domain of the present invention based on the equivalent transformation on the technical solution of the present invention.
Claims (4)
1, a kind of full electronic intelligent electric arc-welding machine electrocution-proof protection device is characterized in that: it mainly is made of housing and the electronic relay, leakage current detecting sensor, working signal detecting sensor and the control circuit board that are arranged in the housing;
Described electronic relay, leakage current detecting sensor, working signal detecting sensor are connected in the arc welding transformer primary side loop of power supply and arc welder;
The control signal output of described control circuit board directly links to each other with the coil of described electronic relay; Described control circuit board is according to the conducting and the disconnection of the duty control electronic relay of arc welder.
2, a kind of full electronic intelligent electric arc-welding machine electrocution-proof protection device according to claim 1, it is characterized in that: described control circuit board mainly is made of microprocessor, resistor voltage divider circuit, enabling signal testing circuit, working signal testing circuit, leakage current testing circuit and drive circuit;
Described resistor voltage divider circuit is connected in parallel on the two ends of described electronic relay;
The signal input part of described enabling signal testing circuit is in parallel with the primary side of electric welding machine arc welding transformer, its signal output part links to each other with the signal input part of microprocessor, microprocessor control signal output links to each other with the control end of described drive circuit, and the output of drive circuit directly links to each other with the control end of described electronic relay; The enabling signal testing circuit constantly detects electric welding machine arc welding transformer primary side voltage, after finding enabling signal, and the notice microprocessor, microprocessor makes the electronic relay conducting by drive circuit;
The signal input part of described working signal testing circuit links to each other with the signal output part of described working signal sensor in being connected on electric welding machine arc welding transformer primary side loop, its signal output part links to each other with the signal input part of microprocessor, microprocessor control signal output links to each other with the control end of described drive circuit, and the output of drive circuit directly links to each other with the control end of described electronic relay;
The signal input part of described leakage current testing circuit links to each other with the signal output part of described leakage current detecting sensor in being connected on electric welding machine arc welding transformer primary side loop, and its signal output part links to each other with the signal input part of described microprocessor and drive circuit; The output of described drive circuit directly links to each other with the control end of described electronic relay.
3, a kind of full electronic intelligent electric arc-welding machine electrocution-proof protection device according to claim 2, it is characterized in that: described resistor voltage divider circuit mainly is made of divider resistance, and it is connected in parallel on welder power input electronic relay two ends.
4, a kind of full electronic intelligent electric arc-welding machine electrocution-proof protection device according to claim 1 is characterized in that: also connect this buffer circuit of a buffer circuit before the signal input part of described enabling signal testing circuit and mainly be made of switching tube, optocoupler; Control end of switching tube links to each other with described microprocessor control signal output in this buffer circuit, the signal output part of this switching tube links to each other with the signal input part of optocoupler, and the signal output part of optocoupler links to each other with the signal input part of described enabling signal testing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159591 CN1280057C (en) | 2002-12-31 | 2002-12-31 | Anti-shock protector of full electronic intelligent electric arc welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02159591 CN1280057C (en) | 2002-12-31 | 2002-12-31 | Anti-shock protector of full electronic intelligent electric arc welder |
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| Publication Number | Publication Date |
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| CN1511671A true CN1511671A (en) | 2004-07-14 |
| CN1280057C CN1280057C (en) | 2006-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02159591 Expired - Fee Related CN1280057C (en) | 2002-12-31 | 2002-12-31 | Anti-shock protector of full electronic intelligent electric arc welder |
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| CN (1) | CN1280057C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370664C (en) * | 2004-09-30 | 2008-02-20 | 宁波习羽电子发展有限公司 | Arc and leakage protector |
| CN102009249A (en) * | 2010-11-19 | 2011-04-13 | 中船澄西船舶修造有限公司 | Digital electricity saving device for welding machine |
| CN102554410A (en) * | 2012-01-20 | 2012-07-11 | 左敬民 | Electric shock prevention device of electric welding machine |
| CN102554411A (en) * | 2012-01-20 | 2012-07-11 | 左敬民 | Electric shock prevention device for electric welding machine |
| CN103269056A (en) * | 2013-06-08 | 2013-08-28 | 临沂市拓普网络股份有限公司 | Current detection protection device and method |
| CN112247317A (en) * | 2020-09-16 | 2021-01-22 | 中车西安车辆有限公司 | Secondary side electric shock protection device, multi-station direct current welding machine and control method thereof |
-
2002
- 2002-12-31 CN CN 02159591 patent/CN1280057C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100370664C (en) * | 2004-09-30 | 2008-02-20 | 宁波习羽电子发展有限公司 | Arc and leakage protector |
| CN102009249A (en) * | 2010-11-19 | 2011-04-13 | 中船澄西船舶修造有限公司 | Digital electricity saving device for welding machine |
| CN102009249B (en) * | 2010-11-19 | 2013-12-11 | 中船澄西船舶修造有限公司 | Digital electricity saving device for welding machine |
| CN102554410A (en) * | 2012-01-20 | 2012-07-11 | 左敬民 | Electric shock prevention device of electric welding machine |
| CN102554411A (en) * | 2012-01-20 | 2012-07-11 | 左敬民 | Electric shock prevention device for electric welding machine |
| CN102554411B (en) * | 2012-01-20 | 2014-10-29 | 左敬民 | Electric shock prevention device for electric welding machine |
| CN102554410B (en) * | 2012-01-20 | 2015-05-20 | 左敬民 | Electric shock prevention device of electric welding machine |
| CN103269056A (en) * | 2013-06-08 | 2013-08-28 | 临沂市拓普网络股份有限公司 | Current detection protection device and method |
| CN103269056B (en) * | 2013-06-08 | 2015-06-17 | 临沂市拓普网络股份有限公司 | Current detection protection device and method |
| CN112247317A (en) * | 2020-09-16 | 2021-01-22 | 中车西安车辆有限公司 | Secondary side electric shock protection device, multi-station direct current welding machine and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1280057C (en) | 2006-10-18 |
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