CN107971609B - No-load energy-saving device of electric welding machine - Google Patents
No-load energy-saving device of electric welding machine Download PDFInfo
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- CN107971609B CN107971609B CN201810041289.XA CN201810041289A CN107971609B CN 107971609 B CN107971609 B CN 107971609B CN 201810041289 A CN201810041289 A CN 201810041289A CN 107971609 B CN107971609 B CN 107971609B
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- 238000003466 welding Methods 0.000 title claims abstract description 99
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 34
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 description 4
- 230000001934 delay Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
- B23K9/105—Power supply characterised by the electric circuit by using discharge tubes or mechanical contactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention relates to an idle energy-saving device of an electric welding machine, wherein a primary coil of a transformer of the electric welding machine is connected with power terminals, a first control branch and an idle energy-saving control branch are further connected between the two power terminals, the idle energy-saving control branch comprises an attracting coil of a second contactor and a normally closed contact of a second relay, a current detection module for detecting the working state of the electric welding machine is further arranged between the normally open contact of the first contactor and the idle energy-saving control branch, the current detection module is further connected with an idle time delay module, and the idle time delay module is connected with an energy-saving time delay module through the normally open contact of the second relay. The transformer through the electric current detection module can detect the magnitude of the working current of the electric welding machine so as to judge the working state of the electric welding machine, and the delay chip in the idle time delay module can enable the second relay to be electrified and attracted after the electric welding machine enters the idle state for a preset time, so that the electric welding machine enters an idle energy-saving mode, and the idle energy saving of the electric welding machine can be reliably realized.
Description
Technical Field
The invention relates to an energy-saving control technology of an electric welding machine, in particular to an idle energy-saving device of the electric welding machine.
Background
The electric welding machine is intermittent working equipment with high power consumption, load and idle load are alternately carried out, the electric welding machine still consumes high power when the idle load is not carried out, the electric quantity consumed by the electric welding machine when the idle load is measured and calculated is 10% -20% of the total electric quantity, and the existing electric welding machine energy-saving devices are various in variety. The energy-saving device for the electric welding machine disclosed in the Chinese patent document with the application number of 200620024163.4 achieves the aim of controlling the automatic power-off of the electric welding machine when in no-load by connecting a current transformer and a bistable trigger circuit on an electric welding handle sleeve through connecting an alternating current contactor in series on a transformer coil of the electric welding machine, but has the problems of complex circuit structure, large number of used components and parts, high manufacturing cost and high failure rate. The energy-saving electric welding machine disclosed in the Chinese patent document with the application number of 200820118834.2 is characterized by simple structure, but has the problem of inconvenient operation, and when in welding operation, a welder must always press the button switch to keep the contactor in a working state, and the electric welding machine is turned off immediately after releasing hands, and when the operation needs to be suspended in a short time for replacing welding rods, joint processing, workpiece position adjustment and the like, the electric welding machine is repeatedly restarted to cause heavy current impact damage of the electric welding machine, and the energy consumption in the starting process is larger.
Disclosure of Invention
The invention aims to provide an idle energy-saving device of an electric welding machine, which is used for reliably realizing idle energy saving of the electric welding machine.
In order to solve the problems, the invention provides an idle energy-saving device of an electric welding machine, wherein a primary coil of a transformer of the electric welding machine is connected with power terminals, a first control branch consisting of an absorption coil of a first contactor and a normally-closed contact of a first relay is also connected between the two power terminals, the first control branch is also connected with an idle energy-saving control branch in parallel, the idle energy-saving control branch comprises an absorption coil of a second contactor and the normally-closed contact of the second relay, and the idle energy-saving control branch is connected with two ends of the first control branch in parallel through two normally-open contacts of the first contactor; a normally open contact of the second contactor is also connected in series between the suction coil of the second contactor and the electric welding machine, and the two ends of the normally open contact of the second contactor are connected in parallel with a first capacitor and a voltage dropping resistor; a current detection module for detecting the working state of the electric welding machine is further arranged between the normally open contact of the first contactor and the idle energy-saving control branch, and comprises a transformer sleeved on a power supply line of the electric welding machine; the current detection module is also connected with an idle-load delay module, the idle-load delay module comprises a delay chip and the second relay, and the second relay is electrified when the electric welding machine is in an idle-load state; the energy-saving delay module comprises a delay chip and a first relay, the first relay is electrified when the electric welding machine is in an idle state for more than a preset time, and the delay time of the energy-saving delay module is longer than that of the idle delay module.
The no-load energy-saving device of the electric welding machine provided by the invention also has the following technical characteristics:
further, the two ends of the first capacitor are further connected with a Hall detection circuit, the Hall detection circuit comprises a Hall sensor, a second diode and a second triode, a primary coil of the Hall sensor is connected with the two ends of the first capacitor, a secondary coil of the Hall sensor is connected with a resistor in parallel, the secondary coil of the Hall sensor is further connected with the diode through a sixth capacitor, the second triode is connected between the sixth capacitor and the diode, and a collector of the second triode is connected with a delay chip in the no-load delay module.
Further, the current detection module further comprises a first diode, a fifth capacitor and a first triode, wherein the first diode, the fifth capacitor and the first triode are connected with the transformer, the first diode and the fifth capacitor are connected in series and then connected with the two ends of the transformer in parallel, the first triode is connected between the first diode and the fifth capacitor, and a collector electrode of the first triode is connected with a delay chip in the no-load delay module.
Further, the no-load energy-saving device of the electric welding machine further comprises a rectification voltage stabilizing circuit, the rectification voltage stabilizing circuit comprises a first transformer connected with the power terminal, a secondary coil of the first transformer is connected with a bridge rectification filtering module, the output end of the bridge rectification filtering module is connected with a three-terminal voltage stabilizer, and the output end of the three-terminal voltage stabilizer is connected with the no-load time delay module and the energy-saving time delay module to supply power for the no-load time delay module and the energy-saving time delay module.
The invention has the following beneficial effects: the transformer of the current detection module can detect the working current of the electric welding machine to judge the working state of the electric welding machine, the delay chip in the idle time module can enable the second relay to be electrified and attracted after the electric welding machine enters the idle state for a preset time, the normally closed contact of the second relay connected with the attraction coil of the second contactor in series is disconnected after the first relay is electrified, the attraction coil of the second contactor is powered off, the normally open contact of the second contactor connected with the first capacitor in parallel is disconnected, the first capacitor is connected into a power supply circuit of the electric welding machine, the input voltage of the electric welding machine is reduced through the first capacitor, and the electric welding machine enters an idle energy-saving mode; the delay chip in the no-load delay module can avoid frequent opening and closing of the second contactor, reduce the arc loss of the contactor contact, prolong the service life of the contactor, and reliably realize no-load energy saving of the electric welding machine.
Drawings
Fig. 1 is a schematic structural diagram of an idle load energy-saving device of an electric welding machine according to an embodiment of the invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In one embodiment of the no-load energy saving device for the electric welding machine, shown in fig. 1, the no-load energy saving device for the electric welding machine comprises a primary coil of a transformer T4 of the electric welding machine 10 connected with power terminals L1 and L2, a first control branch 20 consisting of an absorption coil of a first contactor KM1 and a normally closed contact J1-1 of a first relay J1 is further connected between the two power terminals L1 and L2, the first control branch is further connected with an no-load energy saving control branch 30 in parallel, the no-load energy saving control branch 30 comprises an absorption coil of a second contactor KM2 and a normally closed contact J2-1 of a second relay J2, and the no-load energy saving control branch 30 is connected in parallel with two ends of the first control branch 20 through two normally open contacts KM1-1 and KM1-2 of the first contactor KM 1; a normally open contact KM2-1 of the second contactor KM2 is also connected in series between the suction coil of the second contactor KM2 and the electric welding machine 10, and two ends of the normally open contact KM2-1 of the second contactor KM2 are connected in parallel with a first capacitor C1 and a voltage dropping resistor R9; a current detection module 40 for detecting the working state of the electric welding machine 10 is further arranged between the normally open contacts KM1-1 and KM1-2 of the first contactor KM1 and the idle energy-saving control branch 30, and the current detection module 40 comprises a transformer T2 sleeved on a power supply line of the electric welding machine 10; the current detection module 40 is also connected with an idle-load delay module 50, the idle-load delay module 50 comprises a delay chip IC2 and a second relay J2, and the second relay J2 is electrified when the electric welding machine 10 is in an idle-load state; the no-load time delay module 50 is connected with an energy-saving time delay module 60 through normally open contacts J2-2 and J2-3 of a second relay J2, the energy-saving time delay module 60 comprises a time delay chip IC1 and a first relay J1, the first relay J1 is electrified when the electric welding machine 10 is in an no-load state for more than a preset time, and the time delay time of the energy-saving time delay module 60 is longer than that of the no-load time delay module 50. According to the no-load energy-saving device of the electric welding machine, the size of the working current of the electric welding machine can be detected through the mutual inductor of the current detection module to judge the working state of the electric welding machine, the delay chip in the no-load delay module can enable the second relay to be electrified and attracted after the electric welding machine enters the no-load state for a preset time (for example, 5 to 15 seconds), the normally closed contact of the second relay connected in series with the attraction coil of the second contactor after the first relay is electrified is disconnected, the attraction coil of the second contactor is powered off, the normally open contact of the second contactor connected in parallel with the first capacitor is disconnected, the first capacitor is connected into a power supply circuit of the electric welding machine, the input voltage of the electric welding machine is reduced through the first capacitor, and the electric welding machine enters the no-load energy-saving mode; the delay chip in the no-load delay module can avoid frequent opening and closing of the second contactor, reduce the arc loss of the contactor contact, prolong the service life of the contactor, and reliably realize no-load energy saving of the electric welding machine. Specifically, the delay chip in the no-load delay module can delay for a preset time, so that the frequent action of the second contactor to switch the power supply state when welding rods are replaced and welding quality is checked for short stopping time is avoided, the arc loss of the contact points of the contactor is reduced, and the service life of the contactor is prolonged; after the current detection module detects that the electric welding machine is in an idle state, the current detection module transmits detection signals to a delay chip IC2 in the idle delay module, the delay chip delays for 3 to 20 seconds and outputs high potential to an attracting coil of a second relay J2, the second relay J2 is electrified and attracted, a normally closed contact J2-1 of the second relay J2 connected in series with the attracting coil of the second contactor KM2 is disconnected, the attracting coil of the second contactor KM2 is deenergized, a normally open contact KM2-1 of the second contactor KM2 connected in parallel with a first capacitor C1 is disconnected, the first capacitor C1 is connected to a power supply line of the electric welding machine, 380V power frequency high voltage input by two power terminals L1 and L2 can be reduced to about 80V through the first capacitor C1 and then power is supplied to a transformer T4 of the electric welding machine 10, and the transformer T4 reduces 80V power frequency power to about 13V to power the electric welding machine, so that the electric welding machine is in an idle power saving state; after the second relay J2 is electrified and attracted, normally open contacts J2-2 and J2-3 of the second relay J2 are closed, a delay chip IC1 in the energy-saving delay module 60 starts to count, when the delay chip IC1 delays for a preset time (for example, the delay time can be set according to specific requirements) the first relay J1 is electrified, a normally closed contact J1-1 of the first relay J1 is disconnected, an attracting coil of the first contactor KM1 is deenergized, normally open contacts KM1-1 and KM1-2 of the first contactor KM1 are disconnected, the whole no-load energy-saving device of the electric welding machine stops working, the electric welding machine is in a complete power-off stop state, and the electric welding machine can be completely powered off after the electric welding machine is in a no-load state for a preset time by setting the delay time of the delay chip in the energy-saving delay module, so that the electric welding worker forgets to turn off the total power supply after the welding is finished, or the electric welding machine is always in the no-load state after the work is finished.
In the above embodiment, the no-load energy-saving device for the electric welding machine further has the following technical characteristics: preferably, two ends of the first capacitor C1 are further connected with a hall detection circuit 70, the hall detection circuit 70 includes a hall sensor T3, a second diode D2, and a second triode Q2, a primary coil of the hall sensor T3 is connected with two ends of the first capacitor C1, a secondary coil of the hall sensor T3 is connected with a resistor XR2 in parallel, a secondary coil of the hall sensor T3 is further connected with a diode D2 through a sixth capacitor C6, a second triode Q2 is connected between the sixth capacitor C6 and the diode D2, and a collector of the second triode Q2 is connected with a delay chip IC2 in the no-load delay module 50; through setting up hall detection circuitry, when second contactor KM2 loses electricity the electric welding machine and is in idle power saving dormant state, if the welding is restarted to the electric welding, the moment that the welding rod contacted with the work piece, send the reversal signal by delay chip IC2 in the idle time delay module after the electric current of hall sensor T3 perception electric welding power supply line changes, output low level and lose electricity second relay J2 loses electricity after the delay chip IC2 in the idle time delay module received the reversal signal that hall sensor T3 sent, the normally closed contact J2-1 of second relay J2 is closed, the actuation coil of second contactor KM2 gets the electricity, normally open contact KM2-1 of second contactor KM2 is closed, first electric capacity C1 is short circuited, the 380V power frequency high voltage direct action of two power supply terminal L1, L2 input is at the both ends of the primary coil of the transformer T4 of electric welding machine 10, the normal operation of 380V rated voltage value is resumes to the electric welding machine in time, can resume normal operating condition with the electric welding machine in time in order to guarantee normal welding demand.
In the above embodiment, preferably, the current detection module 40 further includes a first diode D1, a fifth capacitor C5 and a first triode Q1 connected to the transformer T2, where the first diode D1 is connected in series with the fifth capacitor C5 and then connected in parallel to two ends of the transformer T2, the first triode Q1 is connected between the first diode D1 and the fifth capacitor C5, and a collector of the first triode Q1 is connected to the delay chip IC2 in the idle delay module 50, so that current variation of a power supply line of the electric welding machine can be reliably collected, and a detection signal can be timely sent to the delay chip in the idle delay module when the electric welding machine is in an idle state.
In the foregoing embodiment, preferably, the no-load energy saving device for an electric welding machine further includes a rectifying and voltage stabilizing circuit 80, where the rectifying and voltage stabilizing circuit 80 includes a first transformer T1 connected to the power terminals L1 and L2, a secondary winding of the first transformer T1 is connected with a bridge rectifying and filtering module, an output end of the bridge rectifying and filtering module is connected with a three-terminal voltage stabilizer IM7812, and an output end of the three-terminal voltage stabilizer IM7812 is connected with the no-load delay module 50 and the energy-saving delay module 60 to supply power to the no-load delay module 50 and the energy-saving delay module 60, so as to ensure normal operation of the no-load delay module and the energy-saving delay module, so that the no-load energy saving device for an electric welding machine runs reliably.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. The no-load energy-saving device of the electric welding machine is characterized in that a first control branch consisting of an absorption coil of a first contactor and a normally-closed contact of a first relay is also connected between two power terminals, the first control branch is also connected in parallel with a no-load energy-saving control branch, the no-load energy-saving control branch comprises an absorption coil of a second contactor and the normally-closed contact of the second relay, and the no-load energy-saving control branch is connected in parallel with two ends of the first control branch through two normally-open contacts of the first contactor; a normally open contact of the second contactor is also connected in series between the suction coil of the second contactor and the electric welding machine, and the two ends of the normally open contact of the second contactor are connected in parallel with a first capacitor and a voltage dropping resistor; a current detection module for detecting the working state of the electric welding machine is further arranged between the normally open contact of the first contactor and the idle energy-saving control branch, and comprises a transformer sleeved on a power supply line of the electric welding machine; the current detection module is also connected with an idle-load delay module, the idle-load delay module comprises a delay chip and the second relay, and the second relay is electrified when the electric welding machine is in an idle-load state; the energy-saving delay module comprises a delay chip and a first relay, the first relay is electrified when the electric welding machine is in an idle state for more than a preset time, and the delay time of the energy-saving delay module is longer than that of the idle delay module.
2. The idle energy saving device of a welding machine according to claim 1, wherein: the Hall detection circuit comprises a Hall sensor, a second diode and a second triode, wherein a primary coil of the Hall sensor is connected with two ends of the first capacitor, a secondary coil of the Hall sensor is connected with a resistor in parallel, the secondary coil of the Hall sensor is connected with the diode through a sixth capacitor, the second triode is connected between the sixth capacitor and the diode, and a collector of the second triode is connected with a delay chip in the no-load delay module.
3. The idle energy saving device of the electric welding machine according to claim 2, wherein: the current detection module further comprises a first diode, a fifth capacitor and a first triode, wherein the first diode, the fifth capacitor and the first triode are connected with the mutual inductor, the first diode and the fifth capacitor are connected in series and then connected with the two ends of the mutual inductor in parallel, the first triode is connected between the first diode and the fifth capacitor, and a collector electrode of the first triode is connected with a delay chip in the no-load delay module.
4. The idle energy saving device of a welding machine according to claim 1, wherein: the no-load energy-saving device of the electric welding machine further comprises a rectification voltage stabilizing circuit, the rectification voltage stabilizing circuit comprises a first transformer connected with the power supply terminal, a secondary coil of the first transformer is connected with a bridge rectification filtering module, the output end of the bridge rectification filtering module is connected with a three-terminal voltage stabilizer, and the output end of the three-terminal voltage stabilizer is connected with the no-load time delay module and the energy-saving time delay module to supply power for the no-load time delay module and the energy-saving time delay module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810041289.XA CN107971609B (en) | 2018-01-16 | 2018-01-16 | No-load energy-saving device of electric welding machine |
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| CN201810041289.XA CN107971609B (en) | 2018-01-16 | 2018-01-16 | No-load energy-saving device of electric welding machine |
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| CN107971609A CN107971609A (en) | 2018-05-01 |
| CN107971609B true CN107971609B (en) | 2024-03-08 |
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| CN112247317B (en) * | 2020-09-16 | 2022-08-23 | 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 |
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