CN204621330U - A kind of plasma cutting welder main frame temperature protective device - Google Patents
A kind of plasma cutting welder main frame temperature protective device Download PDFInfo
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- CN204621330U CN204621330U CN201520249165.2U CN201520249165U CN204621330U CN 204621330 U CN204621330 U CN 204621330U CN 201520249165 U CN201520249165 U CN 201520249165U CN 204621330 U CN204621330 U CN 204621330U
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Abstract
A kind of plasma cutting welder main frame temperature protective device, relate to plasma cutting welder field, comprise rectifying and wave-filtering voltage regulating module, PWM chip, temperature detection alarm module, single-chip microcomputer, fan control module, described rectifying and wave-filtering voltage regulating module is directly electrically connected with city, 220V alternating voltage can be become the stable DC voltage of waveform, PWM chip is connected after described rectifying and wave-filtering voltage regulating module, described PWM chip transfers the DC voltage of 220V to ± 12V, the DC voltage of+5V, thereafter temperature detection warning device is connected, described temperature detection warning device connects single-chip microcomputer, described single-chip microcomputer connects fan control module simultaneously, control fan control module switch.The utility model can effectively prevent the overheated of substrate, on-off circuit and rectification circuit, thus reach ensure cut the object of defending machine steady operation.
Description
Technical field
The utility model relates to plasma cutting welder main frame, particularly relates to a kind of plasma cutting welder main frame temperature protective device.
Background technology
General plasma cutting welder all works under big current and high voltage, and components and parts operation can produce a large amount of heats, causes power panel and mainboard temperature to raise, if temperature is too high, must has damaging components or work abnormal; In plasma cutting welder, three places are had to need the monitoring of temperature respectively: 1, power panel temperature, 2, mainboard temperature, 3, nozzle temperature.
In addition, when machine also can produce situation that is overheated or overcurrent because of misoperation or some uncertain reason.Some device of the direct burning apparatus of overheated meeting or the life-span of device is shortened greatly, and overcurrent can cause apparatus overheat on the one hand, spray tip or electrode can be made to burn fast on the other hand.Both of these case does not allow to occur when normal work, and when there are these problems, equipment should shutdown inspection in time.
Utility model content
For the problems referred to above, the utility model provides a kind of novel plasma cutting-welding machine main frame, comprises rectifying and wave-filtering voltage regulating module, PWM chip, temperature detection alarm module, single-chip microcomputer, fan control module; Described rectifying and wave-filtering voltage regulating module comprises power filter, rectifier bridge, High frequency filter, inductor filter, high-power special chip wave filter, rectifying and wave-filtering voltage regulating module is directly electrically connected with city, 220V alternating voltage is become the stable DC voltage of waveform, PWM chip is connected after described rectifying and wave-filtering voltage regulating module, described PWM chip transfers the direct current of 220V the DC voltage of ± 12V ,+5V to, thereafter temperature detection warning device is connected, described temperature detection warning device connects single-chip microcomputer, described single-chip microcomputer connects fan control module simultaneously, controls fan control module switch.
Described temperature detection alarm module comprises steady voltage source, resistance, temperature sensor, temperature alarm, described steady voltage source contact resistance, described resistance connects temperature sensor, temperature alarm successively, and described temperature sensor is stable connection voltage source simultaneously; Described temperature sensor is switching diode, the voltage of the PN junction of described switch diode often raises 1 degree Celsius in temperature, 2mV will be reduced, the temperature probe of described temperature sensor is arranged on the power panel of electric power host, mainboard, shower nozzle place respectively, described resistance is connected with switching diode and plays the effect of current limliting, makes the forward current of switching diode between 0.5 to 3mA, when measured temperature exceedes alarm temperature, circuital current reaches alarming value, thus produces alarm signal.
Described fan control pattern is connected with PWM chip, adopts autonomous power supply system, increases stability.
The utility model beneficial effect: detect power panel temperature, nozzle temperature, mainboard temperature signal by the temperature probe of temperature sensor, be converted to voltage signal, feed back to control circuit, effectively prevent the overheated of substrate, on-off circuit and rectification circuit, thus reach ensure cut the object of defending machine steady operation.
Accompanying drawing explanation
Fig. 1: ion cutting-welding machine main frame temperature protective device structural representation;
Fig. 2: ion cutting-welding machine main frame temperature detection alarm module structural representation.
Detailed description of the invention
As shown in Figure 1, the utility model provides a kind of novel plasma cutting-welding machine main frame, comprises rectifying and wave-filtering voltage regulating module, PWM chip, temperature detection alarm module, single-chip microcomputer, fan control module; Described rectifying and wave-filtering voltage regulating module comprises power filter, rectifier bridge, High frequency filter, inductor filter, high-power special chip wave filter, rectifying and wave-filtering voltage regulating module is directly electrically connected with city, 220V alternating voltage is become the stable DC voltage of waveform, PWM chip is connected after described rectifying and wave-filtering voltage regulating module, described PWM chip transfers the direct current of 220V the DC voltage of ± 12V ,+5V to, thereafter temperature detection warning device is connected, described temperature detection warning device connects single-chip microcomputer, described single-chip microcomputer connects fan control module simultaneously, controls fan control module switch.
Described temperature detection warning device comprises steady voltage source, resistance, temperature sensor, temperature alarm, described steady voltage source contact resistance, described resistance connects temperature sensor and temperature alarm, the probe of described temperature sensor is switching diode 1N4148, the voltage of the PN junction of diode is utilized often to raise 1 degree Celsius in temperature, this characteristic of 2mV will be reduced, 1N4148 is adopted to have good linearity as temperature sensor, highly sensitive, the feature that size is little, the scope of its thermometric is-50 ~ 150 degrees Celsius; The temperature probe of described temperature sensor is arranged on the power panel of electric power host, mainboard, shower nozzle place respectively, described resistance is connected with diode and plays the effect of current limliting, make the forward current of diode between 0.5 to 3mA, when measured temperature exceedes alarm temperature, circuital current reaches alarming value, thus produces alarm signal.
Described fan control pattern is connected with PWM chip, adopts autonomous power supply system, increases stability.
Claims (5)
1. a plasma cutting welder main frame temperature protective device, it is characterized in that: comprise rectifying and wave-filtering voltage regulating module, PWM chip, temperature detection alarm module, single-chip microcomputer, fan control module, described rectifying and wave-filtering voltage regulating module is directly electrically connected with city, 220V alternating voltage can be become the stable DC voltage of waveform, PWM chip is connected after described rectifying and wave-filtering voltage regulating module, described PWM chip can transfer the DC voltage of 220V to ± 12V, the DC voltage of+5V, thereafter temperature detection warning device is connected, described temperature detection warning device connects single-chip microcomputer, described single-chip microcomputer connects fan control module simultaneously, control fan control module switch.
2. plasma cutting welder temperature protective device according to claim 1; it is characterized in that: described temperature detection alarm module comprises steady voltage source, resistance, temperature sensor, temperature alarm; described steady voltage source contact resistance; described resistance connects temperature sensor, temperature alarm successively, and described temperature sensor is stable connection voltage source simultaneously.
3. plasma cutting welder temperature protective device according to claim 2, is characterized in that: described temperature sensor is switching diode, and the voltage of the PN junction of described switch diode often raises 1 degree Celsius in temperature, will reduce 2mV.
4. plasma cutting welder temperature protective device according to claim 1, is characterized in that: described rectifying and wave-filtering voltage regulating module comprises power filter, rectifier bridge, High frequency filter, inductor filter, high-power special chip wave filter.
5. plasma cutting welder temperature protective device according to claim 1, is characterized in that: described fan control module is connected with PWM chip, adopts autonomous power supply system, increases stability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520249165.2U CN204621330U (en) | 2015-04-23 | 2015-04-23 | A kind of plasma cutting welder main frame temperature protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520249165.2U CN204621330U (en) | 2015-04-23 | 2015-04-23 | A kind of plasma cutting welder main frame temperature protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204621330U true CN204621330U (en) | 2015-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520249165.2U Active CN204621330U (en) | 2015-04-23 | 2015-04-23 | A kind of plasma cutting welder main frame temperature protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204621330U (en) |
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2015
- 2015-04-23 CN CN201520249165.2U patent/CN204621330U/en active Active
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