CN101259560A - Electric welding machine with prevention of electric shock and electric leakage function - Google Patents
Electric welding machine with prevention of electric shock and electric leakage function Download PDFInfo
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- CN101259560A CN101259560A CN 200810036609 CN200810036609A CN101259560A CN 101259560 A CN101259560 A CN 101259560A CN 200810036609 CN200810036609 CN 200810036609 CN 200810036609 A CN200810036609 A CN 200810036609A CN 101259560 A CN101259560 A CN 101259560A
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Abstract
An electric welding machine with anti-electric shock and anti-current leakage functions is provided with an anti-electric shock device and a current leakage protector, and the anti-electric shock device comprises a start-up signal frequency selection circuit, a switching circuit of start-up and shut-down and an empty travel delay circuit which are connected by circuits. The electric welding machine with the anti-electric shock and anti-current leakage functions which is provided by the invention has simple circuits, reliable work, long service life and strong practicality.
Description
Technical field
The present invention relates to a kind of electric welding machine, relate in particular to a kind of electric welding machine with protection against electric shock and leakage function.
Background technology
Electric welder no-load voltage reduces can prevent electric shock.In the prior art, the technical scheme of a lot of realizations reduction floating voltages is arranged, as using piezoelectric element, under unloaded no-voltage situation, producing starting-up signal through the people for knocking piezoelectric element, make electric welding machine connect the control scheme of welding behind the power supply, is exactly wherein a kind of.Because there are shortcomings such as circuit is complicated, shortage, the necessary link that adapts to operation, interference free performance difference in this type of scheme at present, the technology that hindering is used.
And existing electric welding machine, generally be not with earth leakage protective device, easily cause the generation of electric shock accidents.
Summary of the invention
A kind of electric welding machine with protection against electric shock leakage function provided by the invention provides a kind of circuit simple, and reliable operation is used Shou Yongchang, practical anti-electric shock apparatus and earth leakage protective device.
In order to achieve the above object, the invention provides a kind of electric welding machine, on electric welding machine, be provided with anti-electric shock apparatus and earth leakage protective device with protection against electric shock leakage function;
Described anti-electric shock apparatus comprises:
The starting-up signal frequency selection circuit takes out the starting-up signal that piezoelectric element produces from the electric welding machine primary side, can start shooting;
The startup-shutdown commutation circuit when welding finishes to send stop sign when the back floating voltage rises to rated value, can be shut down;
The idle running delay circuit, after starting-up signal is connected, prolong a short duration and connect the welder power start again, make operating personnel that the time of a gesture conversion be arranged, because of the rules regulation, electric welding machine must not surpass a second by the logical specified floating voltage time, as do not have idle running and delay time, (do not surpass a second) when then operating personnel also have enough time to aim at welding work pieces after knocking piezoelectric element, the power supply failed again for electric welding machine, cisco unity malfunction;
Adopt such scheme, frequency selection circuit can effectively stop spurious signal to be invaded, and reduces misoperation, increases functional reliability.Commutation circuit adopts the control of small power electric sub-element, helps simplifying circuit, increases the service life.The idle running delay circuit gears to actual circumstances from being convenient to operation, helps improving practicality.
Described earth leakage protective device is connected on the welder power circuit, and earth leakage protective device is installed on the electric welding machine panel.
Rational in infrastructure, safe in utilization, can effectively take precautions against the generation of electric shock accidents, and RCCB is directly installed on the electric welding machine panel compact conformation.
Description of drawings
Fig. 1 is the electrical schematic diagram of anti-electric shock apparatus among the present invention;
Fig. 2 is the configuration diagram of earth leakage protective device among the present invention;
Fig. 3 is earth leakage protective device installation site figure among the present invention.
The specific embodiment
Followingly specify preferred embodiment of the present invention according to Fig. 1～Fig. 3:
As shown in Figure 1, the main contacts of electric welding machine coil B primary side 1 end and electric network source 16 end coupled in series A.C. contactor QC is controlled as main circuit, and current transformer L punching is enclosed within on this series wiring.Secondary side 17 ends, 18 ends connect electrode holder line H and ground wire D respectively, and parallel connection simultaneously has the piezoelectric element HTD of shell protection.Start-stop car signal respectively through comparator 1C1, IC2 carry out definite value relatively after output order.This device is by power transformer and slightly power supply of rectifier power source figure.
Commutation circuit 11 is made up of unidirectional controllable silicon S CR, triode G2, resistor R 3.7 ends of its 8 end and diode D2 link, and 11 ends of basic 12 ends and comparator 1C2 link, and 10 ends of its 9 end and idle running delay circuit 111 link.When the high potential starting-up signal arrived this circuit 8 ends, unidirectional controllable silicon S CR was switched on, and the shift pulse signal that piezoelectric element HTD is produced is the normal open starting-up signal.
Stopping process is when electric welding machine stops welding; similar with prior art; comparator 1C2 through definite value relatively after exportable high potential; make this circuit triode G2 conducting; then unidirectional controllable silicon S CR ends because of the anode decompression; send stopping signal, similar with prior art, electric welding machine coil B will be de-energized.
Idle running delay circuit 111 is made up of potentiometer W, capacitor C2.9 ends of its 10 end and commutation circuit 11 link, and 14 ends of its 13 end and triode C1 link.After the normal open starting-up signal enters into this circuit 10 ends, need through the time-delay of RC charging constant, similar with prior art, realize the time-delay start.
As shown in Figures 2 and 3, be connected to earth leakage protective device 2 on electric welding machine 1 power circuit, earth leakage protective device 2 is installed on electric welding machine 1 front panel 3.
Claims (7)
1. the electric welding machine with protection against electric shock leakage function is characterized in that, is provided with anti-electric shock apparatus and earth leakage protective device on electric welding machine;
Described anti-electric shock apparatus comprises starting-up signal frequency selection circuit, startup-shutdown commutation circuit and the idle running delay circuit that circuit connects.
2. the electric welding machine with protection against electric shock leakage function as claimed in claim 1, it is characterized in that, a side of electric welding machine coil (B) (1) is controlled as main circuit with the main contacts of electric network source end (16) coupled in series A.C. contactor (QC), and current transformer (L) punching is enclosed within on this series wiring; Secondary side (17,18) connects electrode holder line (H) and ground wire (D) respectively, and parallel connection simultaneously has the piezoelectric element (HTD) of shell protection; The startup-shutdown signal respectively through comparator (1C1, IC2) carry out definite value relatively after output order.
3. the electric welding machine with protection against electric shock leakage function as claimed in claim 1 is characterized in that, described anti-electric shock apparatus is by power transformer and rectifier power source power supply.
4. the electric welding machine with protection against electric shock leakage function as claimed in claim 1 is characterized in that, described frequency selection circuit (1) is made up of the normally-closed contact (J2) of transformer (BL), capacitor (C1), relay (J); This circuit end (3,4) links with the end (1,2) of electric welding machine coil (B) respectively, and its end (5) links with the end (6) of diode (D1); The power-on pulse signal that piezoelectric element (HTD) is knocked the back generation enters transformer (BL) through normally-closed contact (J2) again through electric welding machine coil (B) coupling, the LC resonant tank of being made up of its secondary coil and capacitor (C1) is selected and is delivered to comparator (1C1) through diode (D1), its end (7) output high potential starting-up signal.
5. the electric welding machine with protection against electric shock leakage function as claimed in claim 1 is characterized in that, described commutation circuit (11) is made up of one-way SCR (SCR), triode (G2), resistor (R3); Its end (8) links with the end (7) of diode (D2), and end (12) links with the end (11) of comparator (1C2), and its end (9) links with the end (10) of idle running delay circuit (111); When the high potential starting-up signal arrived this circuit end (8), one-way SCR (SCR) was switched on, and the shift pulse signal that piezoelectric element (HTD) is produced is the normal open starting-up signal; Stopping process is when electric welding machine stops welding, comparator (1C2) through definite value relatively after exportable high potential, make this circuit triode (G2) conducting, then one-way SCR (SCR) ends because of the anode decompression, sends stopping signal, electric welding machine coil (B) will be de-energized.
6. the electric welding machine with protection against electric shock leakage function as claimed in claim 1 is characterized in that, described idle running delay circuit (111) is made up of potentiometer (W), capacitor (C2); Its end (10) links with the end (9) of commutation circuit (11), and its end (13) links with the end (14) of triode (C1); After the normal open starting-up signal enters into this circuit end (10), need to realize the time-delay start through the time-delay of RC charging constant.
7. the electric welding machine with protection against electric shock leakage function as claimed in claim 1 is characterized in that, is connected to earth leakage protective device (2) on the described welder power circuit, and earth leakage protective device (2) is installed on the electric welding machine front panel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810036609 CN101259560A (en) | 2008-04-24 | 2008-04-24 | Electric welding machine with prevention of electric shock and electric leakage function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810036609 CN101259560A (en) | 2008-04-24 | 2008-04-24 | Electric welding machine with prevention of electric shock and electric leakage function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101259560A true CN101259560A (en) | 2008-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810036609 Pending CN101259560A (en) | 2008-04-24 | 2008-04-24 | Electric welding machine with prevention of electric shock and electric leakage function |
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| CN (1) | CN101259560A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639570A (en) * | 2013-12-27 | 2014-03-19 | 芬雷选煤工程技术(北京)有限公司 | Electric welding machine protecting device |
| CN107649768A (en) * | 2017-10-16 | 2018-02-02 | 安徽工程大学 | A kind of electric shock-prevention safety protector of electric welding machine |
| CN111618394A (en) * | 2020-05-23 | 2020-09-04 | 上海沪工焊接集团股份有限公司 | Electric shock prevention control circuit of inverter welding machine |
-
2008
- 2008-04-24 CN CN 200810036609 patent/CN101259560A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639570A (en) * | 2013-12-27 | 2014-03-19 | 芬雷选煤工程技术(北京)有限公司 | Electric welding machine protecting device |
| CN103639570B (en) * | 2013-12-27 | 2017-01-04 | 芬雷选煤工程技术(北京)有限公司 | A kind of electric welding machine protective device |
| CN107649768A (en) * | 2017-10-16 | 2018-02-02 | 安徽工程大学 | A kind of electric shock-prevention safety protector of electric welding machine |
| CN111618394A (en) * | 2020-05-23 | 2020-09-04 | 上海沪工焊接集团股份有限公司 | Electric shock prevention control circuit of inverter welding machine |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080910 |