CN203720296U - New type welding machine open-phase and housing grounding detection device - Google Patents
New type welding machine open-phase and housing grounding detection device Download PDFInfo
- Publication number
- CN203720296U CN203720296U CN201420071531.5U CN201420071531U CN203720296U CN 203720296 U CN203720296 U CN 203720296U CN 201420071531 U CN201420071531 U CN 201420071531U CN 203720296 U CN203720296 U CN 203720296U
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- Prior art keywords
- phase
- welding machine
- optocoupler
- power source
- resistance
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- 238000003466 welding Methods 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 title abstract description 8
- 206010010219 Compulsions Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010014357 Electric shock Diseases 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Arc Welding Control (AREA)
Abstract
The utility model discloses a new type welding machine open-phase and housing grounding detection device which is used to control a welding machine power source through the electronic detection technology. The adopted technical scheme is that two phases in a three-phase power source are connected to the input end of a control transformer; a third phase in the three-phase power source which is not connected with the control transformer is connected to a detection circuit, the detection circuit comprises a diode V1, resistors R1-R3, an optocoupler U1 and a light-emitting diode LED, the third phase is connected with the input end of the optocoupler U1 through a current-limiting portion, an auxiliary power source terminal is connected with the output end of the optocoupler U1 through the resistor R2, the output end of the optocoupler U1 is connected with the light-emitting diode LED through the resistor R3, and the anode of the light-emitting diode LED is connected with the control portion of the welding machine. According to the china compulsory certification (CCC), the welding machine power housing must be grounded reliably, but many users neglect the requirement, which bring great inconvenience and security risks for welding machine users, and according to the utility model, the problem can be overcome.
Description
Technical field
The utility model relates to welding gear, relates in particular to a kind of welding machine with the instruction of input power phase shortage and chassics earth protection pick-up unit.
Background technology
Welding machine manufacturing enterprise is a lot of at present, and its product is also different, because industrial welding machine electric power is all three-phase three-wire system input power; The lack detection circuit of three-phase three-wire system power supply is more loaded down with trivial details and degree of accuracy is inadequate, so producer's welding machine electric power does not all have phase shortage instruction and protection greatly, require the welding machine electric power casing must reliable ground according to China compulsion certiffication system (CCC), but now a lot of users have neglected again this point, this brings very large inconvenience and potential safety hazard to welding machine user; Bring a lot of negative effects also to welding machine manufacturing firm.
Utility model content
The purpose of this utility model is for whether phase shortage and reliable ground problem whether of welding machine electric power, pass through electric detective technology, butt welding machine power supply is controlled, improve detection and the safe class of butt welding machine input power with this, thereby reach, user is reliable, the object of safe handling, and the technical solution adopted in the utility model is:
The phase shortage of new welder and a chassics earth pick-up unit, is characterized in that: the two-phase Access Control transformer input end in three-phase supply; The third phase access not being connected with control transformer in three-phase supply detects loop, detect loop and comprise diode V1, resistance R 1～R3, optocoupler U1 and LED, third phase is connected with the input end of optocoupler U1 by restricted portion, accessory power supply terminal is connected with the output terminal of optocoupler U1 by resistance R 2, optocoupler U1 output terminal is connected with LED by resistance R 3, and the anode of LED is connected with the control section of welding machine.
According to the phase shortage of described new welder and chassics earth pick-up unit, the negative electrode of the described optocoupler U1 shell that picks, described restricted portion is to be in series by diode V1 and resistance R 1.
This technology is welding machine electric power technical field, and phase shortage butt welding machine power supply brings very large infringement, also can increase the weight of the three-phase imbalance of electrical network, greatly affects welding performance simultaneously; Chassics earth point reliable ground is necessarily requiring of state compulsion certified product system (CCC) security.Welding machine electric power casing is substantially all metal shell, has high pressure in welding machine electric power, because welding machine electric power working environment is often very severe again, is easy to cause high pressure electric leakage, if the unreliable ground connection of welding machine electric power brings very large potential risk can to user's personal safety.The utility model can be stopped the problems referred to above completely.
Brief description of the drawings
Fig. 1 is the functional-block diagram of new welder phase shortage and chassics earth pick-up unit.
Fig. 2 is the circuit diagram of new welder phase shortage and chassics earth pick-up unit.
Embodiment
As Fig. 1; because welding machine electric power adopts three line three-phase system input powers; in power supply, there is no zero line; welding machine electric power is owing to relating to control section, so there is control transformer (low-tension transformer), control transformer is got two-phase; if there is a phase phase shortage in this two-phase; control section does not have accessory power supply, and welding machine electric power can not be worked, and this two-phase has default-phase protection function.Therefore, this two-phase open-phase protection need not be considered, only needs to consider third phase phase shortage problem.Utilize the principle that civil power and large ground voltage are AC220V; third phase and chassics earth point are detected, if not reliable connection of third phase phase shortage or chassics earth point any point, phase shortage/unearthed protection pilot lamp is just bright; and the output of turn-offing welding machine electric power, welding machine electric power is quit work.
As shown in Figure 2, when in three-phase input power, V phase and W have one to occur mutually phase shortage phenomenon in mutually, control transformer T1 just can not work, accessory power supply+15B and-15B just do not have, welding machine just quits work;
When phase shortage situation appears in U mutually, optocoupler U1 does not work, accessory power supply+15B drives phase shortage/unearthed pilot lamp LED work by resistance R 2, R3, phase shortage/unearthed indication light diode (LED) work, there is phase shortage phenomenon in reminding user, resistance R 3 another road control signals are received control panel pwm chip simultaneously, close isolation drive signal, a medium frequency inverter power device is not worked, thereby reach the object of closing welding machine electric power output.
When not phase shortage of U phase, casing does not have the situation of reliable ground, input power U is by diode V1, resistance R 1, the optocoupler U1 shell that picks, because casing does not have reliable ground, this circuit can not form loop, optocoupler U1 does not work, and phase shortage/unearthed indication light diode (LED) is luminous, and phase shortage or unearthed phenomenon appear in reminding user.
When not phase shortage of U phase, casing reliable ground, input power U forms loop by diode V1, resistance R 1, optocoupler U1, chassics earth point mutually, optocoupler U1 work, capacitor C 7 can make the work that optocoupler U1 is stable.Accessory power supply+15B is by resistance R 2, optocoupler U1 to reference point ground, and phase shortage/unearthed indication light diode (LED) is not luminous, resistance R 3 another road control signals are opened welding machine electric power output to control panel, and welding machine electric power is normally worked.
The utility model is source of welding current technical field, by electric detective technology, and the control of butt welding machine power supply, circuit is simple, novel, reliable.Input power is carried out to phase shortage detection and solved welding machine electric power because power supply input phase failure causes the out of order illusion of welding machine, and casing reliable ground is detected, welder's Danger Electric shock risk is reduced greatly, the object that personal safety is protected.
Claims (2)
1. the phase shortage of new welder and a chassics earth pick-up unit, is characterized in that: the two-phase Access Control transformer input end in three-phase supply; The third phase access not being connected with control transformer in three-phase supply detects loop, detect loop and comprise diode V1, resistance R 1～R3, optocoupler U1 and LED, third phase is connected with the input end of optocoupler U1 by restricted portion, accessory power supply terminal is connected with the output terminal of optocoupler U1 by resistance R 2, optocoupler U1 output terminal is connected with LED by resistance R 3, and the anode of LED is connected with the control section of welding machine.
2. the phase shortage of new welder according to claim 1 and chassics earth pick-up unit, is characterized in that: the negative electrode of the described optocoupler U1 shell that picks, described restricted portion is to be in series by diode V1 and resistance R 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420071531.5U CN203720296U (en) | 2014-02-19 | 2014-02-19 | New type welding machine open-phase and housing grounding detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420071531.5U CN203720296U (en) | 2014-02-19 | 2014-02-19 | New type welding machine open-phase and housing grounding detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203720296U true CN203720296U (en) | 2014-07-16 |
Family
ID=51159437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420071531.5U Expired - Lifetime CN203720296U (en) | 2014-02-19 | 2014-02-19 | New type welding machine open-phase and housing grounding detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203720296U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809073A (en) * | 2014-02-19 | 2014-05-21 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of novel welding machine |
-
2014
- 2014-02-19 CN CN201420071531.5U patent/CN203720296U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809073A (en) * | 2014-02-19 | 2014-05-21 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of novel welding machine |
| CN103809073B (en) * | 2014-02-19 | 2017-01-25 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of welding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |