CN209282815U - Detection protection circuit, over-pressure safety device and electric welding machine - Google Patents
Detection protection circuit, over-pressure safety device and electric welding machine Download PDFInfo
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- CN209282815U CN209282815U CN201822198023.4U CN201822198023U CN209282815U CN 209282815 U CN209282815 U CN 209282815U CN 201822198023 U CN201822198023 U CN 201822198023U CN 209282815 U CN209282815 U CN 209282815U
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Abstract
The utility model discloses a kind of detection protection circuit, over-pressure safety device and electric welding machine, and it includes detection circuit, control relay circuit and overvoltage crowbar which, which protects circuit,；Wherein, the detection circuit feeds back to the control relay circuit for detecting the alternating voltage of input；The control relay circuit, for according to the alternating voltage and predetermined voltage threshold judge the alternating voltage whether over-voltage；In the alternating voltage over-voltage, output over-voltage protection signal to the detection circuit carries out clamper to the alternating voltage via the overvoltage crowbar, to stop powering to the equipment to be protected.Technical solutions of the utility model are applied in over-pressure safety device by the way that varistor and thermistor are packaged together, by judge input alternating voltage whether over-voltage, to damage machine internal components when preventing over-voltage from inputting.
Description
Technical field
The utility model relates to electric welding machine technical field, in particular to a kind of detection protection circuit, over-pressure safety device and
Electric welding machine.
Background technique
Now with the continuous renewal development of industrial technology, the high light feature small in size of its welding efficiency of inverter type welder is
It is widely used, since its complicated reliance security of industrial environment is also increasingly focal point.For in difference
Welding machine design adaptability is also corresponding variation under environment.General welding machine inhibits surge current using access thermistor,
Varistor is accessed to prevent input over-voltage.
Inverter type welder is using the method for being directly accessed thermistor and varistor at present, and this method is due to thermistor
The specification difference response time is different, and when inputting over-voltage, varistor start-up temperature rises quickly, and thermistor cannot open in time
Dynamic circuit breaker, which opens circuit and will result in varistor, to break down, and this method reliability is very low.
Utility model content
The main purpose of the utility model is to provide a kind of detection protection circuit, over-pressure safety device and electric welding machine, it is intended to
By the way that varistor and thermistor are packaged together, apply in over-pressure safety device, pass through the alternating current of judgement input
Pressure whether over-voltage, thus when preventing over-voltage from inputting damage machine internal components.
To achieve the above object, the utility model proposes detection protection circuit include detection circuit, relay control electricity
Road and overvoltage crowbar；Wherein, the input terminal of the detection circuit and the output end of AC power source connect, the detection circuit
The first output end connect with the first end of the overvoltage crowbar, the second output terminal of the detection circuit and the over-voltage
The second end of protection circuit is all connect with equipment to be protected respectively, the control relay circuit and equipment to be protected difference
All it is connect with control power supply；
The detection circuit feeds back to the control relay circuit for detecting the alternating voltage of input；
The control relay circuit, for judging the alternating voltage according to the alternating voltage and predetermined voltage threshold
Whether over-voltage；In the alternating voltage over-voltage, output over-voltage protection signal to the detection circuit, via the overvoltage protection
Circuit carries out clamper to the alternating voltage, to stop powering to the equipment to be protected.
Preferably, the overvoltage crowbar includes the first thermistor and the second varistor；Wherein, first heat
Quick resistance and second varistor are encapsulated in together；
The first end of first thermistor be connected to the first end of the overvoltage crowbar and with detection electricity
First output end on road connects, the second end of first thermistor be connected to the second end of the overvoltage crowbar and with
The first end of second varistor and the equipment to be protected are separately connected, the second end connection of second varistor
To the overvoltage crowbar third end and connect with the output end of the AC power source.
Preferably, the detection circuit includes the first varistor, shine photo-coupler, the 5th capacitor, first resistor, the
One diode and relay；Wherein,
The second end of first varistor is connect with the second output terminal of the AC power source, the first pressure-sensitive electricity
The first end of resistance is separately connected with the output end of the luminous photo-coupler and the second end of the 5th capacitor, the luminous light
The input terminal of coupler is separately connected with the first end of the 5th capacitor and the second end of the first resistor, first electricity
The first end of resistance is connect with the cathode of the first diode, anode and the overvoltage crowbar of the first diode
First output end of first end, the relay contact first end and the AC power source is separately connected, the relay contact
Second end is connect with the equipment to be protected, and relay Inside coil end is connect with the control relay circuit.
Preferably, the control relay circuit includes power supply, second resistance, third capacitor and receives photo-coupler；Its
In,
The first end point of the Inside coil first end and the second resistance of the output end of the power supply and the relay
It does not connect, the first end point of the second end of the second resistance and the input terminal for receiving photo-coupler and the third capacitor
It does not connect, the second end of the output end for receiving photo-coupler and the third capacitor is grounded.
Preferably, the control relay circuit further includes the second diode, the first triode, the 4th capacitor, third electricity
Resistance and third diode；Wherein,
The output end of the power supply is connect with the cathode of second diode, the collector of first triode and institute
The Inside coil second end for stating the positive and described relay of the second diode is separately connected, the base stage of first triode with
First end, the first end of the positive and described 3rd resistor of the third diode of 4th capacitor are separately connected, described
The cathode of third diode is connect with the first end of the third capacitor, the emitter of first triode, the 4th electricity
The second end of the second end of appearance and the 3rd resistor is grounded.
To achieve the above object, the utility model also proposes that a kind of over-pressure safety device, the over-pressure safety device include
Circuit is protected in detection described in any one as above.
Preferably, the over-pressure safety device further includes the equipment to be protected and the control power supply；Wherein, it is described to
Protecting equipment includes rectification circuit, first capacitor, the second capacitor, inverter；
The second end and relay control electricity of the first input end of the rectification circuit and the overvoltage crowbar
Road is separately connected, and the second input terminal of the rectification circuit is connect with the third end of the overvoltage crowbar, the rectified current
First output end on road is connect with the first end of the first capacitor, the second output terminal of the rectification circuit and first electricity
The second end of appearance connects, and the first end of second capacitor is connect with the first end of the first capacitor, second capacitor
Second end is separately connected with the second end of the first capacitor and the control power supply, the first input end of the inverter and institute
The first end connection of the second capacitor is stated, the second input terminal of the inverter is connect with the second end of second capacitor.
Preferably, the rectification circuit includes the 4th diode, the 5th diode, the 6th diode and the 7th diode；
Wherein,
Anode and the cathode of the 7th diode and the second end of the overvoltage crowbar of 4th diode
It is separately connected, the first end difference of the cathode of the 4th diode and the cathode of the 5th diode and the first capacitor
Connection, the anode of the 5th diode and the third end of the cathode of the 6th diode and the overvoltage crowbar are distinguished
Connection, the anode of the 6th diode and the second end of the positive and described first capacitor of the 7th diode connect respectively
It connects.
To achieve the above object, the utility model also proposes that a kind of electric welding machine, the electric welding machine include any one as above
The over-pressure safety device.
Technical solutions of the utility model are formed by setting detection circuit, control relay circuit and overvoltage crowbar
Circuit is protected in a kind of detection.Wherein, the detection circuit is used to detect the alternating voltage of input, feeds back to the relay control
Circuit processed；The control relay circuit is used to judge that the alternating voltage is according to the alternating voltage and predetermined voltage threshold
No over-voltage；In the alternating voltage over-voltage, output over-voltage protection signal to the detection circuit, via the overvoltage protection electricity
Road carries out clamper to the alternating voltage, to stop powering to the equipment to be protected.Technical solutions of the utility model pass through by
Varistor and thermistor are packaged together, and apply in over-pressure safety device, by judge input alternating voltage whether
Over-voltage, to damage machine internal components when preventing over-voltage from inputting.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the functional block diagram of one embodiment of the utility model over-pressure safety device；
Fig. 2 is the circuit structure diagram of one embodiment of the utility model over-pressure safety device.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Detection protection circuit | RV1~RV2 | First varistor to the second varistor |
| 110 | Detection circuit | PTC1 | Thermistor |
| 120 | Control relay circuit | C1~C5 | First capacitor is to the 5th capacitor |
| 130 | Overvoltage crowbar | R1~R3 | First resistor is to 3rd resistor |
| 200 | Control power supply | Q1 | First triode |
| 300 | Equipment to be protected | D1~D7 | First diode is to the 7th diode |
| 310 | Rectification circuit | U1A | Shine photo-coupler |
| VCC | Power supply | U1B | Receive photo-coupler |
| K1 | Relay | GND | Ground connection |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component, such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot understand
For its relative importance of indication or suggestion or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the technical side between each embodiment
Case can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when the combination of technical solution
Occur it is conflicting or when cannot achieve should people think that the combination of this technical solution is not present, also do not wanted in the utility model
Within the protection scope asked.
The utility model proposes a kind of over-pressure safety devices.
Referring to Fig.1, in the utility model embodiment, it includes detection circuit 110, relay which, which protects circuit 100,
Control circuit 120 and overvoltage crowbar 130；Wherein, the input terminal of the detection circuit 110 and the output end of AC power source connect
It connects, the first output end of the detection circuit 110 is connect with the first end of the overvoltage crowbar 130, the detection circuit
110 second output terminal and the second end of the overvoltage crowbar 130 are all connect with equipment to be protected 300 respectively, it is described after
Electrical apparatus control circuit 120 and the equipment to be protected 300 are all connect with control power supply 200 respectively；
The detection circuit 100 feeds back to the control relay circuit 120 for detecting the alternating voltage of input；
The control relay circuit 120, for judging the exchange according to the alternating voltage and predetermined voltage threshold
Voltage whether over-voltage；In the alternating voltage over-voltage, output over-voltage protection signal is to the detection circuit 110, via described
Overvoltage crowbar 130 carries out clamper to the alternating voltage, to stop powering to the equipment to be protected 300.
It should be noted that in actual use, often thering is the inverter type welder of specified input 220V to be existed by misconnection
Lead to machine breakdown on 380V voltage, in the present embodiment, detection protection circuit 100 is applied into the overvoltage protection
In device, to be connected to the input terminal of electric welding machine, when being switched on work, alternating current first passes through the detection of the detection circuit 110,
And feed back to the control relay circuit 120；The control relay circuit 120 is used for according to the alternating voltage and presets
Voltage threshold judge the alternating voltage whether over-voltage；In the alternating voltage over-voltage, the control relay circuit 120 is controlled
It makes the 100 internal relay K1 of detection circuit and does not start actuation, with output over-voltage protection signal to the detection circuit 110,
It is input to the overvoltage crowbar 130 via the first output end of the detection circuit 110, so that the overvoltage crowbar
130 pairs of alternating voltages carry out clamper, to stop powering to the equipment to be protected 300, then protect machine internal components not
Damage, can be switched on after electric welding machine is accessed correct voltage again normal use in this way, thus damage when preventing over-voltage from inputting
Machine internal components.
Technical solutions of the utility model pass through setting detection circuit 110, control relay circuit 120 and overvoltage crowbar
130, form a kind of detection protection circuit.Wherein, the detection circuit 110 is used to detect the alternating voltage of input, feeds back to
The control relay circuit 120；The control relay circuit 120 is used for according to the alternating voltage and predetermined voltage threshold
Judge the alternating voltage whether over-voltage；In the alternating voltage over-voltage, output over-voltage protection signal to the detection circuit
110, clamper is carried out to the alternating voltage via the overvoltage crowbar, to stop powering to the equipment to be protected 300.
Technical solutions of the utility model apply in over-pressure safety device, lead to by the way that varistor and thermistor are packaged together
Cross judge input alternating voltage whether over-voltage, thus when preventing over-voltage from inputting damage machine internal components.
Specifically, referring to Fig. 2, the overvoltage crowbar 130 includes the first thermistor PTC1 and the second varistor
RV2；Wherein, the first thermistor PTC1 and the second varistor RV2 are encapsulated in together；
The first end of the first thermistor PTC1 be connected to the first end of the overvoltage crowbar 130 and with it is described
First output end of detection circuit 110 connects, and the second end of the first thermistor PTC1 is connected to the overvoltage protection electricity
It the second end on road 130 and is separately connected with the first end of the second varistor RV2 and the equipment to be protected 300, it is described
The second end of second varistor RV2 is connected to the third end of the overvoltage crowbar 130 and defeated with the AC power source
Outlet connection.
It should be noted that being pressed inside the overvoltage crowbar 130 by a thermistor and one in the present embodiment
Quick resistance encapsulates, and such encapsulation combination is avoided because the thermistor specification different response times are different, when inputting over-voltage
Varistor start-up temperature rises quickly, and thermistor cannot start in time disconnects the defect that circuit causes varistor to break down,
So that the overvoltage crowbar 130 carries out clamper to the alternating voltage when receiving overvoltage protection signal.
Specifically, the detection circuit 110 include the first varistor RV1, shine photo-coupler U1A, the 5th capacitor C5,
First resistor R1, first diode D1 and relay K1；Wherein,
The second end of the first varistor RV1 is connect with the second output terminal of the AC power source, first pressure
The first end of quick resistance RV1 connects respectively with the output end of the luminous photo-coupler U1A and the second end of the 5th capacitor C5
It connects, the input terminal and the first end of the 5th capacitor C5 and the second end of the first resistor R1 of the luminous photo-coupler C5
It is separately connected, the first end of the first resistor R1 is connect with the cathode of the first diode D1, the first diode D1
Anode and the first end of the overvoltage crowbar 130, the relay K1 contact first end and the AC power source the
One output end is separately connected, and relay K1 contact second end is connect with the equipment to be protected 300, in the relay K1
Portion's coil-end is connect with the control relay circuit 120.
The control relay circuit 120 includes power supply VCC, second resistance R2, third capacitor C3 and receives photo-coupler
U1B；Wherein,
The of the Inside coil first end of the output end of the power supply VCC and the relay K1 and the second resistance R2
One end is separately connected, the input terminal and third electricity of the second end of the second resistance R2 and the reception photo-coupler U1B
The first end for holding C3 is separately connected, and the second end of the output end for receiving photo-coupler U1B and the third capacitor C3 connect
Ground.
The control relay circuit 120 further includes the second diode D2, the first triode Q1, the 4th capacitor C4, third
Resistance R3 and third diode D3；Wherein,
The output end of the power supply VCC is connect with the cathode of the second diode D2, the collection of the first triode Q1
The Inside coil second end of electrode and the positive and described relay K1 of the second diode D2 is separately connected, and the described 1st
The first end of the base stage of pole pipe Q1 and the 4th capacitor C4, the positive and described 3rd resistor R3 of the third diode D3
First end is separately connected, and the cathode of the third diode D3 is connect with the first end of the third capacitor C3, and the described 1st
The second end of the emitter of pole pipe Q1, the second end of the 4th capacitor C4 and the 3rd resistor R3 is grounded.
It should be noted that in the present embodiment, it is described at this time when the alternating voltage is lower than the predetermined voltage threshold
First varistor RV1 is not turned on, so that the luminous photo-coupler U1A, the first resistor R1 and the described 1st
The circuit of pole pipe D1 is not turned on, and the luminous coupler U1A does not shine, and the alternating voltage passes through the overvoltage protection electricity at this time
The first thermistor PTC1 inside road 130 is via the rectification circuit 310 to the electrolytic capacitor in the equipment to be protected 300
It charges, surge current is reduced by the first thermistor PTC1 inside the overvoltage crowbar 130, described in guarantee
Rectification circuit 310 will not be damaged；When the electrolytic capacitor in the equipment to be protected 300 charges to default starting voltage threshold
Afterwards, the control power supply 200 starts and powers to the 120 internal electric source VCC of control relay circuit, due to the luminous coupling
Clutch U1A does not shine and the reception photo-coupler U1B is made to be also at off-state, and the power supply VCC is through second electricity
It hinders R2 to charge to the third capacitor C3, when the voltage of the third capacitor C3 is charged to the limit value more than the third diode D3
When, the first triode Q1 receives signal and is connected, so that controlling the relay K1 is attracted work, electric current is straight after actuation
The relay K1 was connected via the rectification circuit 310,130 no current of overvoltage crowbar passes through at this time, i.e. institute
The connection stated between detection circuit 110 and the equipment to be protected 300 is connected by the relay K1, and such electric welding machine is just
Rectification starting up's process is completed, so that machine works normally.
Further, in this embodiment when the alternating voltage is higher than the predetermined voltage threshold, i.e. over-voltage, at this time
The first varistor RV1 conducting, so that the luminous photo-coupler U1A, the first resistor R1 and described first
The circuit of diode D1 is connected, and the luminous coupler U1A shines, and the control power supply 200 starts or do not start, institute at this time
Stating reception photo-coupler U1B can all be connected due to receiving the luminous coupler U1A and shining, to control relay K1 disconnection
Without working；The alternating current first passes through the first thermistor PTC1 inside the overvoltage crowbar 130 via described whole
Current circuit 310 charges to the electrolytic capacitor in the equipment to be protected 300, while inside the overvoltage crowbar 130
Second varistor RV2 is connected under high voltages, while by the second end of the overvoltage crowbar 130 and third end both ends
Voltage clamping is being preset in safe voltage to protect the device in the equipment to be protected 300 not damaged by high pressure, the mistake
Meeting fast heating after 130 inside the second varistor RV2 conducting of voltage protection circuit, at this time can be with the overvoltage crowbar 130
The temperature of the first thermistor PTC1 of inside rapid increase together, 130 first thermistor of inside of overvoltage crowbar
The resistance value of PTC1 can rise very rapidly up to 1,100 times or more, finally because of 130 first thermistor of inside of overvoltage crowbar
The internal resistance of PTC1, the voltage beyond part all will be on the 130 first thermistor PTC1 of inside of overvoltage crowbar, i.e.,
Connection between the detection circuit 110 and the equipment to be protected 300 is equal to off-state, thus when preventing over-voltage from inputting
Damage machine internal components.
The utility model also proposes that a kind of over-pressure safety device, the over-pressure safety device include described in any one as above
Detection protect circuit 100.
The over-pressure safety device includes above-mentioned detection protection circuit 100, and the specific structure of the over-pressure safety device is referring to upper
Embodiment is stated, since this over-pressure safety device uses whole technical solutions of above-mentioned all embodiments, is at least had upper
All beneficial effects brought by the technical solution of embodiment are stated, this is no longer going to repeat them.
Specifically, referring to Fig. 2, the over-pressure safety device further includes the equipment to be protected 300 and the control power supply
200；Wherein, the equipment to be protected circuit 300 includes rectification circuit 310, first capacitor C1, the second capacitor C2 and inverter；
The second end and the relay of the first input end of the rectification circuit 310 and the overvoltage crowbar 130
Control circuit 120 is separately connected, the third end of the second input terminal of the rectification circuit 310 and the overvoltage crowbar 130
Connection, the first output end of the rectification circuit 310 are connect with the first end of the first capacitor C1, the rectification circuit 310
Second output terminal connect with the second end of the first capacitor C1, the first end of the second capacitor C2 and the first capacitor
The first end of C1 connects, and the second end of the second capacitor C2 is connect with the second end of the first capacitor C1, the inverter
First input end connect with the first end of the second capacitor C2, the second input terminal of the inverter and second capacitor
The second end of C2 connects.
It should be noted that the first capacitor C1 and the second capacitor C2 is electrolytic capacitor, when the electrolytic capacitor
After charging to default starting voltage threshold, the control power supply 200 be will start to the 120 inside electricity of control relay circuit
Source VCC power supply.
The rectification circuit 310 includes the 4th diode D4, the 5th diode D5, the 6th diode D6 and the 7th diode
D7；Wherein,
The anode of the 4th diode D4 and the cathode of the 7th diode D7 and the overvoltage crowbar 130
Second end is separately connected, the cathode of the 4th diode D4 and the cathode and the first capacitor C1 of the five or two pole D5 pipe
First end be separately connected, anode and the cathode and the overvoltage protection of the 6th diode D6 of the 5th diode D5
The third end of circuit 130 is separately connected, the anode and the anode of the 7th diode D7 of the 6th diode D6 and described
The second end of first capacitor C1 is separately connected.
It should be noted that the rectification circuit 310 is used to carry out the alternating current received after rectification processing to described
First capacitor C1 and the second capacitor C2 charge.
The utility model also proposes that a kind of electric welding machine, the electric welding machine include the dress of overvoltage protection described in any one as above
It sets.
The electric welding machine includes above-mentioned over-pressure safety device, the specific structure of the over-pressure safety device referring to above-described embodiment,
Since this electric welding machine uses whole technical solutions of above-mentioned all embodiments, at least with the technical side of above-described embodiment
All beneficial effects brought by case, this is no longer going to repeat them.
The electric welding machine can be inverter type welder, be applied in inversion Manual direct current Arc Welding Power.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
It is all under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (9)
1. circuit is protected in a kind of detection, which is characterized in that including detection circuit, control relay circuit and overvoltage crowbar；
Wherein, the input terminal of the detection circuit and the output end of AC power source connect, the first output end of the detection circuit and institute
State the first end connection of overvoltage crowbar, the second end of the second output terminal of the detection circuit and the overvoltage crowbar
Difference is all connect with equipment to be protected, and the control relay circuit and the equipment to be protected all connect with control power supply respectively
It connects；
The detection circuit feeds back to the control relay circuit for detecting the alternating voltage of input；
The control relay circuit, for whether judging the alternating voltage according to the alternating voltage and predetermined voltage threshold
Over-voltage；In the alternating voltage over-voltage, output over-voltage protection signal to the detection circuit, via the overvoltage crowbar
Clamper is carried out to the alternating voltage, to stop powering to the equipment to be protected.
2. detection protection circuit as described in claim 1, which is characterized in that the overvoltage crowbar includes the first temperature-sensitive electricity
Resistance and the second varistor；Wherein, first thermistor and second varistor are encapsulated in together；
The first end of first thermistor be connected to the first end of the overvoltage crowbar and with the detection circuit
First output end connection, the second end of first thermistor be connected to the second end of the overvoltage crowbar and with it is described
The first end of second varistor and the equipment to be protected are separately connected, and the second end of second varistor is connected to institute
It states the third end of overvoltage crowbar and is connect with the output end of the AC power source.
3. detection protection circuit as claimed in claim 2, which is characterized in that the detection circuit include the first varistor,
Shine photo-coupler, the 5th capacitor, first resistor, first diode and relay；Wherein,
The second end of first varistor is connect with the second output terminal of the AC power source, first varistor
First end is separately connected with the output end of the luminous photo-coupler and the second end of the 5th capacitor, the luminous optical coupling
The input terminal of device is separately connected with the first end of the 5th capacitor and the second end of the first resistor, the first resistor
First end is connect with the cathode of the first diode, the anode of the first diode and the first of the overvoltage crowbar
First output end at end, the relay contact first end and the AC power source is separately connected, the relay contact second
End is connect with the equipment to be protected, and relay Inside coil end is connect with the control relay circuit.
4. detection protection circuit as claimed in claim 3, which is characterized in that the control relay circuit includes power supply, the
Two resistance, third capacitor and reception photo-coupler；Wherein,
The output end of the power supply connects respectively with the Inside coil first end of the relay and the first end of the second resistance
It connects, the second end of the second resistance and the first end of the input terminal for receiving photo-coupler and the third capacitor connect respectively
It connects, the second end of the output end for receiving photo-coupler and the third capacitor is grounded.
5. detection protection circuit as claimed in claim 4, which is characterized in that the control relay circuit further includes the two or two
Pole pipe, the first triode, the 4th capacitor, 3rd resistor and third diode；Wherein,
The output end of the power supply is connect with the cathode of second diode, the collector of first triode and described the
The Inside coil second end of the positive and described relay of two diodes is separately connected, the base stage of first triode with it is described
The first end of 4th capacitor, the first end of the positive and described 3rd resistor of the third diode are separately connected, the third
The cathode of diode is connect with the first end of the third capacitor, the emitter of first triode, the 4th capacitor
The second end of second end and the 3rd resistor is grounded.
6. a kind of over-pressure safety device, which is characterized in that the over-pressure safety device includes such as claim 1 to 5 any one
Circuit is protected in the detection.
7. over-pressure safety device as claimed in claim 6, which is characterized in that the over-pressure safety device further includes described wait protect
Protect equipment and the control power supply；Wherein, the equipment to be protected includes rectification circuit, first capacitor, the second capacitor, inversion
Device；
The second end and the control relay circuit point of the first input end of the rectification circuit and the overvoltage crowbar
It does not connect, the second input terminal of the rectification circuit is connect with the third end of the overvoltage crowbar, the rectification circuit
First output end is connect with the first end of the first capacitor, the second output terminal of the rectification circuit and the first capacitor
Second end connection, the first end of second capacitor are connect with the first end of the first capacitor, and the second of second capacitor
End is separately connected with the second end of the first capacitor and the control power supply, the first input end of the inverter and described the
The first end of two capacitors connects, and the second input terminal of the inverter is connect with the second end of second capacitor.
8. over-pressure safety device as claimed in claim 7, which is characterized in that the rectification circuit includes the 4th diode, the
Five diodes, the 6th diode and the 7th diode；Wherein,
The anode of 4th diode and the second end of the cathode of the 7th diode and the overvoltage crowbar are distinguished
Connection, cathode and the cathode of the 5th diode and the first end of the first capacitor of the 4th diode connect respectively
It connects, the anode of the 5th diode connects respectively with the cathode of the 6th diode and the third end of the overvoltage crowbar
It connects, the anode of the 6th diode and the second end of the positive and described first capacitor of the 7th diode are separately connected.
9. a kind of electric welding machine, which is characterized in that the electric welding machine includes that the over-voltage as described in claim 6 to 8 any one is protected
Protection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822198023.4U CN209282815U (en) | 2018-12-25 | 2018-12-25 | Detection protection circuit, over-pressure safety device and electric welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822198023.4U CN209282815U (en) | 2018-12-25 | 2018-12-25 | Detection protection circuit, over-pressure safety device and electric welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209282815U true CN209282815U (en) | 2019-08-20 |
Family
ID=67607453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822198023.4U Active CN209282815U (en) | 2018-12-25 | 2018-12-25 | Detection protection circuit, over-pressure safety device and electric welding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162507A (en) * | 2020-01-13 | 2020-05-15 | 浙江众邦机电科技有限公司 | Electric control overvoltage protection system and method for sewing machine |
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2018
- 2018-12-25 CN CN201822198023.4U patent/CN209282815U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111162507A (en) * | 2020-01-13 | 2020-05-15 | 浙江众邦机电科技有限公司 | Electric control overvoltage protection system and method for sewing machine |
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Address after: 518133 floor 501 (4-5), building B, Feiyang science and Technology Innovation Park, No.8, Longchang Road, 67 District, Xingdong community, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province:No.4 factory building, Fenghuang fourth industrial zone, Fenghuang community, Fuyong street, Bao'an District, Shenzhen City) 518133 Room 501, building B, Feiyang science and Technology Innovation Park, No.8, Longchang Road, 67 District, Xingdong community, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Ruiling Industrial Group Co.,Ltd. Address before: 2-6 / F, building B, Feiyang technology, No.8, Longchang Road, Baocheng 67 District, Bao'an District, Shenzhen, Guangdong 518103 Patentee before: SHENZHEN RILAND INDUSTRY Co.,Ltd. |