CN86104447A - Electric welding machine electricity saving security switch - Google Patents
Electric welding machine electricity saving security switch Download PDFInfo
- Publication number
- CN86104447A CN86104447A CN 86104447 CN86104447A CN86104447A CN 86104447 A CN86104447 A CN 86104447A CN 86104447 CN86104447 CN 86104447 CN 86104447 A CN86104447 A CN 86104447A CN 86104447 A CN86104447 A CN 86104447A
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- welding machine
- electric
- switch
- signal
- automatic stop
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Abstract
Special welding machine switch of the present invention, it is made up of an A.C. contactor and the transistor circuit that aims at this switch designs.It has no-load automatic stop and two kinds of functions of electrical shock protection.Use it not only can save idle power consumption, simultaneously, because of insulation damages, can cut off the electricity supply automatically under the situation that electric leakage occurs or cause the person to get an electric shock thus, and send warning at electric welding machine.
Complete machine power consumption when unloaded is no more than 3VA.
Description
The present invention is a kind of special welding machine switch.
Present employed special welding machine switch has only no-load automatic stop, no electrical shock protection function.Because electric welding machine also is a kind of frequent hand-hold type power consumption equipment that moves, its employed switch should have electrical energy saving and two kinds of functions of protection personal safety.
Purpose of design of the present invention is in order to provide a kind of both can having accomplished to save idle power consumption, and can to accomplish the protection personal safety again, such two kinds of new switching equipments that function integrates.
The present invention is made up of an A.C. contactor and the transistor circuit that aims at this switch designs, and it has no-load automatic stop and two kinds of functions of electrical shock protection.Use it not only can save idle power consumption, again can be at electric welding machine because of insulation damages, electric leakage occurs and cause thus cutting off the electricity supply automatically under the situation of electric shock and sending warning.Before getting rid of, fault no longer do not send.Complete machine power consumption when unloaded is no more than 3VA.
This switch is provided with current supply circuit and is used for detection of electrical leakage amplified current signal amplifier and no-load automatic stop and its auxiliary circuit frequency generator.
Accompanying drawing is a schematic circuit of the present invention, and the meaning of symbol is as follows among the figure:
DK-knife switch RD-fuse CJ-A.C. contactor
OLH-zero sequence current mutual inductor DH-electric welding machine B-3VA transformer SA-leak(age) test button K-toggle switch J-sensitive relay BG-triode D-diode DW-voltage stabilizing didoe C-capacitor R-resistor W-adjustable resistor Y-loudspeaker
Operation principle of the present invention is described below with reference to the accompanying drawings:
After DK closed a floodgate, B at first entered operation, and voltage-stablizer is exported+12V voltage simultaneously, and this voltage is through R1、D
1, to C1After the charging, again through W3Trigger BG2.3Saturation conduction makes J1, the CJ adhesive, DH brings into operation, DH time level is just exported the voltage of 60～80V, this voltage is through D3Rectification C2R is passed through in filtering6、W
1At W2Upper dividing potential drop rear portion electric current returns zero, and another part electric current flows into BG after DW punctures1Base stage makes BG1Saturation conduction is (owing to adjusting W1And W2After make a point current potential b point current potential when 40～50V be higher than the breakdown voltage of DW) BG at this moment1Current collection is electronegative potential very. D1Just no current passes through. This moment J1Adhesive by C1Discharge is kept, and this is held time is exactly the setting time of no-load running, capable of regulating W3Realize, be generally 1～5 minute. The calculating of this setting time is namely to begin stopping postwelding each time, because a point current potential is lower than 40～50V during welding, DW does not have punch-through, BG1Be in cut-off state, BG2.3Keep saturated, J1, the normal adhesive of CJ, electric welding machine place duty.
When electric welding machine stops weldering above behind the setting time, because C1Discharge off BG2.3Just cut-off, J1, CJ discharges, DH is just out of service. All not having over the ground power-frequency voltage in the primary and secondary winding of electric welding machine DH after out of service exists.
DH is after out of service because two normally-closed contacts of CJ connect, at this moment by the audio signal of frequency generator output through R
4, CJ
1-6And D
3Rectification, C
2CJ is passed through in filtering again
1-7Directly inject BG
1Base stage has been kept BG
1Saturated, and BG
2.3End, make J
1, CJ no longer moves.
When the welding beginning, because welding rod and workpiece contact short circuit, the audio signal current potential that a is ordered equals zero BG
1End rapidly ,+12V triggers BG again in this moment
2.3Saturation conduction makes J
1, the CJ adhesive, electric welding machine is in running order again.
When welding machine was damaged the situation that electric leakage occurs or get an electric shock because of insulation under, last generation one electric leakage signal of OLH after current signal amplifier amplifies, became a command signal, makes J
2Adhesive, CJ discharges, and electric welding machine is just out of service, and loudspeaker send alarm signal again at the same time.
This switch also is provided with manually and automatic transmission switch, if in use, this switch internal circuit failure can push K switch manually temporarily, can not delay work.
Claims (5)
1, a kind of special welding machine switch is characterized in that audio electrical signal is used on the special welding machine switch, makes this special switch possess no-load automatic stop and two kinds of functions of electrical shock protection.
2, special switch according to claim 1 is characterized in that two kinds of functions of no-load automatic stop and electrical shock protection are to finish under the instruction of transistor circuit with an A.C. contactor.
3, transistor circuit according to claim 2 is characterized in that being provided with in the circuit frequency generator, and the signal of telecommunication of this frequency generator output is input to the secondary winding of electric welding machine after the electric welder no-load automatic stop.
4, its function Characteristics of the signal of telecommunication of exporting of frequency generator according to claim 3 is:
A, keep the transient state after the electric welder no-load automatic stop.
The sampled signal of b, do welding beginning.
C, electric welding machine are because of electric leakage, and after the protective circuit action, it is again the signal source of reporting to the police.
5, the frequency of the frequency generator output signal of telecommunication according to claim 3 is selected to be confined in the audiorange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86104447 CN86104447A (en) | 1986-06-26 | 1986-06-26 | Electric welding machine electricity saving security switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86104447 CN86104447A (en) | 1986-06-26 | 1986-06-26 | Electric welding machine electricity saving security switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86104447A true CN86104447A (en) | 1988-01-06 |
Family
ID=4802469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86104447 Pending CN86104447A (en) | 1986-06-26 | 1986-06-26 | Electric welding machine electricity saving security switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86104447A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350570A (en) * | 2011-09-23 | 2012-02-15 | 中国长江航运集团青山船厂 | Protection device for electric welder |
-
1986
- 1986-06-26 CN CN 86104447 patent/CN86104447A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350570A (en) * | 2011-09-23 | 2012-02-15 | 中国长江航运集团青山船厂 | Protection device for electric welder |
| CN102350570B (en) * | 2011-09-23 | 2014-10-22 | 中国长江航运集团青山船厂 | Protection device for electric welder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |