CN114566940A - Welding bead descaling machine protection circuit - Google Patents
Welding bead descaling machine protection circuit Download PDFInfo
- Publication number
- CN114566940A CN114566940A CN202210236362.5A CN202210236362A CN114566940A CN 114566940 A CN114566940 A CN 114566940A CN 202210236362 A CN202210236362 A CN 202210236362A CN 114566940 A CN114566940 A CN 114566940A
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- protection circuit
- circuit
- transformer
- protection
- relay
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a protection circuit of a welding bead cleaning machine, which comprises a transformer, a starting module and a protection module, wherein the primary end of the transformer is connected with one end of a power supply; the protection module comprises a relay and a protection circuit, the relay is in a normally closed state, a controlled end of the relay is respectively connected with the other end of the primary side of the transformer and the other end of the power supply, a control end of the relay is connected with the protection circuit, the starting module comprises a control circuit, a silicon controlled rectifier and a shunt, a first winding and a second winding of the secondary side of the transformer supply power to the control circuit, a third winding of the secondary side of the transformer supplies power to the cleaning machine through the silicon controlled rectifier and the shunt, and the control circuit is connected with a control electrode of the silicon controlled rectifier; the two sides of the shunt are respectively connected with the protection circuit and the control circuit, when the protection circuit detects that the cleaning machine is short-circuited, the control relay is disconnected, and after no current exists in the primary side of the transformer, the circuit stops working after the secondary side of the transformer, so that the protection effect is achieved.
Description
Technical Field
The invention relates to the technical field of welding bead cleaning, in particular to a protection circuit of a welding bead cleaning machine.
Background
Traditional welding bead descaling machine is when cleaning the welding bead, the condition of short circuit can appear, and the circuit short circuit can arouse the incident easily if not in time outage, if directly jump the main brake, can influence other consumer and normally work to and inconvenient use.
Disclosure of Invention
The present invention is directed to solve at least one of the problems of the prior art, and therefore, the present invention provides a bead cleaner protection circuit.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
according to an embodiment of a first aspect of the invention, the protection circuit of the weld bead cleaning machine comprises a transformer, a starting module and a protection module, wherein the primary end of the transformer is connected with one end of a power supply; the protection module comprises a relay and a protection circuit, the relay is in a normally closed state, a controlled end of the relay is respectively connected with the other end of the primary side of the transformer and the other end of the power supply, a control end of the relay is connected with the protection circuit, the starting module comprises a control circuit, a silicon controlled rectifier and a current divider, a first winding and a second winding of the secondary side of the transformer supply power to the control circuit, a third winding of the secondary side of the transformer supplies power to the cleaning machine through the silicon controlled rectifier and the current divider, and the control circuit is connected with a control electrode of the silicon controlled rectifier; the two sides of the shunt are respectively connected with the protection circuit and the control circuit, and when the protection circuit detects that the cleaning machine is short-circuited, the relay is controlled to be disconnected.
The welding bead cleaning machine protection circuit provided by the embodiment of the invention at least has the following beneficial effects: when the cleaning machine works, if the rear-section circuit is short-circuited carelessly, the protection circuit controls the relay of the front-section circuit to be switched off after detecting the short circuit, and the secondary of the transformer stops working after no current exists in the primary of the transformer, so that the protection effect is achieved.
According to some embodiments of the invention, the protection module further comprises an indicator light, the indicator light is connected with the protection circuit, and the indicator light is controlled to flash when the protection circuit detects that the cleaning machine is short-circuited.
According to some embodiments of the invention, the protection module further comprises a fan, the fan is connected to the protection circuit, and the fan is activated when the primary side of the transformer is energized.
According to some embodiments of the invention, the start module further comprises a water pump circuit connected to the control circuit, and a motor connected to the water pump circuit.
According to some embodiments of the invention, the start module further comprises a display meter, the display meter being electrically connected to the control circuit.
According to some embodiments of the invention, the starting module further comprises a rectifier bridge, an input end of the rectifier bridge is connected with the third winding of the secondary of the transformer, and an output end anode of the rectifier bridge is connected with the anode of the thyristor and the control circuit.
According to some embodiments of the invention, the protection circuit further comprises a buzzer for prompting, and the buzzer is controlled to give an alarm when the protection circuit detects that the cleaning machine is short-circuited.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic diagram of a portion of the protection circuit of the present invention;
fig. 3 is a schematic diagram of a portion of the control circuit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are further described below with reference to the accompanying drawings.
The technical solutions in the embodiments of the present invention will be fully described below, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to some embodiments, the protection circuit of the weld bead cleaning machine, as shown in fig. 1, comprises a transformer T, a starting module and a protection module, wherein one primary end of the transformer T is connected with one end of a power supply; the protection module comprises a relay K and a protection circuit, the relay K is in a normally closed state, a controlled end of the relay K is respectively connected with the other end of the primary side of the transformer T and the other end of the power supply, and a control end of the relay K is connected with the protection circuit; the starting module comprises a control circuit, a thyristor Q10 and a current divider F, wherein a first winding and a second winding of a secondary winding of the transformer T supply power to the control circuit, a third winding of the secondary winding of the transformer T supplies power to the cleaning machine through the thyristor Q10 and the current divider F, and the control circuit is connected with a control electrode of the thyristor Q10; and the two sides of the shunt F are respectively connected with the protection circuit and the control circuit, and when the protection circuit detects the short circuit of the cleaning machine, the relay K is controlled to be disconnected.
Based on the above embodiment, during operation, the primary input power of the transformer T is in a normally closed state, the secondary output power of the transformer T is in a normally closed state, the control circuit controls the conduction of the controllable silicon Q10, and the cleaning machine starts to work. The protection circuit detects whether the power supply of the cleaning machine is short-circuited or not through the shunt F, when the protection circuit detects that the power supply of the cleaning machine is short-circuited, the relay K is controlled to be disconnected, after the relay K is disconnected, the primary side of the transformer T does not have the power supply, the secondary side does not output, and the cleaning machine stops working to play a protection role.
According to some embodiments, as shown in fig. 1-2, the protection module further comprises an indicator light D11, the indicator light D11 is connected with the protection circuit, and the indicator light D11 is controlled to blink when the protection circuit detects a short circuit of the cleaning machine.
Based on the embodiment, when the protection circuit detects that the cleaning machine is short-circuited, the indicator lamp D11 is controlled to flash to prompt the cleaning machine to be abnormal, and after the cleaning machine is recovered to be normal, the indicator lamp D11 stops flashing.
According to some embodiments, as shown in fig. 1, the protection module further comprises a fan M1, the fan M1 is connected to the protection circuit, and the fan M1 is activated when the primary of the transformer T is powered on.
Based on the above embodiment, after power is turned on, the fan M1 is activated to assist the whole device in dissipating heat, so as to prevent the electric appliance and components from being damaged by high temperature.
According to some embodiments, as shown in fig. 1, the start module further comprises a water pump circuit connected to the control circuit, and a motor M2 connected to the water pump circuit.
Based on above-mentioned embodiment, provide the water source that washes to the welding bead through water pump circuit control water pump, be convenient for clear up the welding bead.
According to some embodiments, as shown in fig. 1, the start module further comprises a display meter electrically connected to the control circuit.
Based on the embodiment, the display table is used for displaying the working states and working parameters of the cleaning machine and the water pump, and displaying whether the working states are normal or not, so that adjustment can be conveniently made by observing data.
According to some embodiments, as shown in fig. 1, the starting module further includes a rectifier bridge D12, an input terminal of the rectifier bridge D12 is connected to the third winding of the secondary side of the transformer T, and an output terminal of the rectifier bridge D12 is connected to the anode of the thyristor Q10 and the control circuit.
Based on the above embodiment, the cleaning machine needs direct current power supply, and supplies power to the rear-stage circuit after being rectified into direct current by the rectifier bridge D12.
According to some embodiments, the protection circuit further comprises a buzzer for prompting, and the buzzer is controlled to give an alarm when the protection circuit detects that the cleaning machine is short-circuited.
Based on the above embodiment, as shown in fig. 2, the protection circuit includes a resistor R1-a resistor R17, a capacitor C1-a capacitor C6, a diode D1, a diode D2, a transistor Q1-a transistor Q3, and an LM339 chip. The 9V alternating current outputs a direct current power supply VCC after being rectified and filtered, one end of a resistor R1 is connected with the power supply VCC, the other end of the resistor R1 is connected with one end of a resistor R2 and the anode of a diode D1, the cathode of a diode D1 is grounded, the other end of a resistor R2 is connected with one end of a capacitor C1, one end of a resistor R3 and an LM339 chip pin 8, the other end of a capacitor C1 and the other end of a resistor R3 are grounded, the LM339 chip pin 9 is grounded through a shunt F, the LM339 chip pin 3 is connected with the power supply VCC, the pin 12 is grounded, the pin 14 is connected with one end of a capacitor C2, the anode of a diode D2, one end of a resistor R4 and one end of a resistor R5, the other end of a capacitor C2 is grounded, the other end of a resistor R4 is connected with the power supply VCC, the other end of a resistor R5 is connected with the cathode of a diode D2 and one end of a resistor R6, the other end of a resistor R6, one end of a capacitor C4 and one end of an LM339 chip pin 11, the other end of a capacitor C4 is grounded, the other end of a resistor R339 pin 10 is connected with a resistor R7, the other end of a resistor R8 and a resistor C3, the other end of the resistor R7 is connected with a power supply VCC, and the other ends of the resistor R8 and the capacitor C3 are grounded. LM339 chip pin 13 connecting resistance R9, resistance R10, resistance R11 one end, the power VCC is connected to the resistance R9 other end, triode Q1 base is connected to the resistance R10 other end, triode Q3 base is connected to the resistance R11 other end, power VCC is connected to relay K control end one end, triode Q1 collecting electrode is connected to the other end, triode Q1 emitter ground. The power VCC is connected to resistance R12 one end, the other end is connected electric capacity C5, resistance R13, resistance R14 one end and LM339 chip pin 7, electric capacity C5 and resistance R13 other end ground connection, resistance R14 other end connecting resistance R15, resistance R16 one end and LM339 chip pin 1, electric capacity C6 one end and LM339 chip pin 6 are connected to the resistance R15 other end, electric capacity C6 other end ground connection, triode Q2 base is connected to the resistance R16 other end, power VCC is connected to bee calling organ one end, triode Q2 collector is connected to the other end, resistance R17 one end and pilot lamp D11 positive pole, power VCC is connected to the resistance R17 other end, pilot lamp D11 negative ground connection, triode Q2 emitter connects triode Q3 collector, triode Q3 emitter ground connection. After the power is on, 9V alternating current supplies power to the pin 3 and the pin 12 of the LM339 through rectification and filtering, and when the power works normally, the pin 13 of the LM339 outputs low level. When the cleaning machine is short-circuited, the induced current of the current divider F rises and exceeds an early warning value, the LM339 chip pin 13 outputs high level, the triode Q1 is conducted to control the relay K to be conducted and disconnected, the secondary of the transformer T does not have power output, therefore, the protection circuit is safe, the buzzer gives out an alarm sound, and the indicator light D11 flickers.
As shown in fig. 3, the control circuit includes a resistor R18-a resistor R31, a capacitor C7-a capacitor C10, a zener diode D11-a zener diode D13, an LM324 chip, an optocoupler U, a 7812 chip, a triode Q4, a triode Q5 and a thyristor 100-6, the one end of the capacitor C7, the cathode of the zener diode D11 and one end of the resistor R19 are connected through a resistor R18 after rectification of the 13V ac, the other end of the capacitor C7 and the anode of the zener diode D11 are grounded for filtering and voltage stabilization, the other end of the resistor R19 is connected with a pin 2 of the LM324 chip, the input end of the 7812 chip is connected after rectification and filtering of the 13V ac, the first output end of the 7812 chip is connected with a current regulation circuit, one end of the resistor R20, one end of the resistor R25, the collector of the triode Q4 and a pin 4 of the LM324 chip, the second output end of the 7812 chip is connected with a display table, the display table is connected with the control current regulation circuit and connected with the pin 13 of the LM chip 324 through the current regulation circuit, and a pin 13 of the LM324 chip is connected with the anode of a shunt F through a current-limiting resistor, a pin 12 of the LM324 chip is grounded through a current-limiting resistor, a pin 14 is connected with a pin 9 through a resistance-capacitance filter circuit, a pin 8 is connected with the base of a triode Q4 through a resistor R27, a pin 3 is connected with one end of a resistor R22 and the other end of a resistor R20 through a resistor R21, the other end of the resistor R22 is grounded, a pin 11 of the LM324 chip is grounded, a pin 1 is connected with one end of a resistor R24 and the base of the triode Q5 through a resistor R23, the other end of the resistor R24 is grounded, a collector of the triode Q5 is connected with the other end of a resistor R25, the cathode of a voltage-regulator diode D12, one end of a capacitor C8 and a pin 10 of the LM324, an emitter of the triode Q5, the anode of the voltage-regulator diode D12 and the other end of the capacitor C8 are grounded. An emitter of the triode Q4 is connected with one end of a resistor R28 through a control end of an optocoupler U, the other end of the resistor R28 is grounded, one end of a controlled end of the optocoupler U is connected with one end of a capacitor C9, a cathode of a voltage stabilizing diode D13 and one end of a resistor R30, the anodes of the capacitor C9 and the voltage stabilizing diode D13 are connected with a control electrode of a controllable silicon Q10, the other end of the resistor R30 is connected with one end of a resistor R29 and an anode of a controllable silicon 100-6, the other end of the resistor R29 is connected with an anode of the controllable silicon Q10, the control electrode of the controllable silicon 100-6 is connected with the other end of the controlled end of the optocoupler U, one end of the resistor R31 and one end of a capacitor C10, and the other end of the resistor R31, the other end of the capacitor C10 and a cathode of the controllable silicon 100-6 are connected with a control electrode of the controllable silicon Q10. After the power-on, 13V alternating current provides synchronizing signal through resistance R18 and resistance R19 after the rectification, the 13V alternating current after the 7812 chip receives the rectification filtering, the current after the output voltage stabilization, LM324 chip pin 1 outputs synchronizing signal, shunt F detection voltage is exported by LM324 chip pin 14, and with synchronizing signal and detection voltage input LM324 chip comparator pin 10 and pin 9, pin 8 output, and control triode Q4 to switch on through resistance R27, triode Q4 controls the conduction of opto-coupler U, opto-coupler U again controls silicon controlled rectifier 100-6 to switch on, silicon controlled rectifier 100-6 again controls silicon controlled rectifier Q10 to switch on, thereby realize the stable work of descaling machine.
It will be evident to those skilled in the art that the invention is not limited to the exemplary embodiments described above, but that the present solution is capable of being embodied in other specific forms without departing from the essential characteristics thereof. Accordingly, the embodiments should be considered as exemplary and non-limiting.
Claims (7)
1. A protection circuit of a welding bead cleaning machine is characterized by comprising a transformer (T), a starting module and a protection module, wherein the primary end of the transformer (T) is connected with one end of a power supply;
the protection module comprises a relay (K) and a protection circuit, the relay (K) is in a normally closed state, the controlled end of the relay (K) is respectively connected with the other end of the primary side of the transformer (T) and the other end of the power supply, and the control end of the relay (K) is connected with the protection circuit;
the starting module comprises a control circuit, a thyristor (Q10) and a current divider (F), wherein the first winding and the second winding of the secondary side of the transformer (T) supply power to the control circuit, the third winding of the secondary side of the transformer (T) supplies power to the cleaning machine through the thyristor (Q10) and the current divider (F), and the control circuit is connected with a control electrode of the thyristor (Q10);
and the two sides of the shunt (F) are respectively connected with the protection circuit and the control circuit, and when the protection circuit detects the short circuit of the cleaning machine, the relay (K) is controlled to be disconnected.
2. The bead breaker protection circuit according to claim 1, wherein the protection module further comprises an indicator light (D11), the indicator light (D11) is connected with the protection circuit, and the indicator light (D11) is controlled to blink when the protection circuit detects a short circuit of the breaker.
3. The bead breaker protection circuit of claim 1, wherein said protection module further comprises a fan (M1), said fan (M1) being connected to said protection circuit, said fan (M1) being activated when the primary side of the transformer (T) is energized.
4. The bead weld bead remover protection circuit as claimed in claim 1, wherein the starting module further comprises a water pump circuit connected to the control circuit, and a motor (M2) connected to the water pump circuit.
5. The bead cleaner protection circuit of claim 1, wherein the activation module further comprises a display meter, the display meter being electrically connected to the control circuit.
6. The bead cleaner protection circuit according to claim 1, wherein the starting module further comprises a rectifier bridge (D12), an input terminal of the rectifier bridge (D12) is connected to the third winding of the secondary side of the transformer (T), and an output terminal of the rectifier bridge (D12) is connected to the anode of the thyristor (Q10) and the control circuit.
7. The bead breaker protection circuit of claim 1, further comprising a buzzer for providing an alert when the protection circuit detects a short circuit in the breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210236362.5A CN114566940A (en) | 2022-03-11 | 2022-03-11 | Welding bead descaling machine protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210236362.5A CN114566940A (en) | 2022-03-11 | 2022-03-11 | Welding bead descaling machine protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114566940A true CN114566940A (en) | 2022-05-31 |
Family
ID=81718085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210236362.5A Pending CN114566940A (en) | 2022-03-11 | 2022-03-11 | Welding bead descaling machine protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114566940A (en) |
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2022
- 2022-03-11 CN CN202210236362.5A patent/CN114566940A/en active Pending
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