CN203944977U - Electric shock protection device for electric welding machine - Google Patents
Electric shock protection device for electric welding machine Download PDFInfo
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- CN203944977U CN203944977U CN201420432668.9U CN201420432668U CN203944977U CN 203944977 U CN203944977 U CN 203944977U CN 201420432668 U CN201420432668 U CN 201420432668U CN 203944977 U CN203944977 U CN 203944977U
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- control module
- electric shock
- welding machine
- resistance
- electric
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Abstract
The utility model discloses a kind of electric shock protection device for electric welding machine.Comprise monolithic processor control device, clock pulses control module, light emitting diode control module, earth leakage protective control module, failure reset control module, electric shock detection control unit.Described clock pulses control module, light emitting diode control module, earth leakage protective control module, failure reset control module, electric shock detection control unit are all connected with described monolithic processor control device; Described electric shock detection control unit comprises primary power source and control loop and secondary side circuit.It is simple in structure, with low cost, easy to manufacture and handling safety is reliable.Detection weld job personnel that can be reliably real-time, and the resistance value between electric welding machine secondary loop, flow through the current value of human body or to safe voltage of human body etc.; While reaching trip condition, can cut off reliably rapidly welder power, thereby guarantee that weld job personnel, when getting an electric shock, can hightail danger, ensure the object of personal life security.
Description
Technical field
The utility model relates to a kind of welder power technology, relates in particular to a kind of for direct current or A.C. welder shock preventing protector of electric.
Background technology
At present, electric welding machine is one of construction equipment being most widely used during modern industry is produced, electric welding machine is the source of welding current equipment that converts electrical energy into heat energy, the high-temperature electric arc that it utilizes output two electrodes to produce when instantaneous short circuit or electric discharge carrys out scolder and the materials to be welded on consumable electrode, to realize the object that makes their combinations.Electric welding machine is widely used in each large industries such as building, shipbuilding, device fabrication, safe voltage due to the far super 36V of the higher 60～90V of electric welder no-load voltage, during weld job, the required operating voltage of pilot arc is in 16～35V left and right, surpass the 12V safe voltage in canister or under wet environment, there is larger electric shock accidents hidden danger, particularly under bad welding surroundings as in metal structure, in canister, pipeline or under water, weld in moist place, if welder's health is poor, human body resistance is very low, is easy to cause electric shock accidents.Data shows that the annual whole nation causes that by electric welding machine the personnel that cause injure according to incompletely statistics, and electric shock accidents is up to more than 600.Especially in summer, workpeople is at high temperature, humidity, sultry cabin (building site) weld job, and volume of perspiration is large, and welders' life security in serious threat.At present; electric welding machine only has electricity-saving protector; when detecting Light Condition; time delay reduces secondary voltage to 15～20V; still higher than the 12V safe voltage in the canister of national regulation or under wet environment; therefore, the defencive function of existing electricity-saving protector is very limited, can not effectively avoid the generation of personnel's electric shock accidents.
Utility model content
For above-mentioned prior art, the technical problems to be solved in the utility model is to provide a kind of electric shock protection device for electric welding machine.It is simple in structure, with low cost, easy to manufacture and handling safety is reliable.Detection weld job personnel that can be reliably real-time, and the resistance value between electric welding machine secondary loop, flow through the current value of human body or to safe voltage of human body etc.; While reaching trip condition, can cut off reliably rapidly welder power, thereby guarantee that weld job personnel, when getting an electric shock, can hightail danger, ensure the object of personal life security.
For solving the problems of the technologies described above; the utility model provides a kind of electric shock protection device for electric welding machine, comprises monolithic processor control device, clock pulses control module, light emitting diode control module, earth leakage protective control module, failure reset control module, electric shock detection control unit.Two pins in described monolithic processor control device are power input, two pin ground connection; Described clock pulses control module, light emitting diode control module, earth leakage protective control module, failure reset control module, electric shock detection control unit are all connected with described monolithic processor control device; Described clock pulses control module comprises crystal oscillator and electric capacity, and the external described crystal oscillator of described monolithic processor control device two pins and two described condenser networks of parallel connection connect; Described light emitting diode control module comprises two resistance, two light emitting diodes and power supply, and light emitting diode and power circuit are connected described two resistance respectively with separately; Described earth leakage protective control module comprises auxiliary reclay, photoelectrical coupler, resistance, power supply and earth leakage protective output relay, and described auxiliary reclay, photoelectrical coupler, resistance, power supply and earth leakage protective output relay circuit are connected; Described failure reset control module comprises resistance, press button and power supply, and described resistance, press button are connected with VDD-to-VSS circuit; Described electric shock detection control unit comprises primary power source and control loop and secondary side circuit, for detecting in real time insulaion resistance, when presetting standard value, cuts off immediately welder power, guarantees to protect personal safety.
As a kind of improvement of the present utility model, described secondary survey time road comprises additional dc power supply, commutation diode, current-limiting resistance, sampling resistor and soldering turret; Described secondary detection loop is by additional dc power supply, is connected, then is connected with earth connection circuit with electrode holder line respectively by commutation diode with current-limiting resistance circuit separately, and the other end is received on the sheet metal of soldering turret by sampling resistor.
As further improvement of the utility model; described primary power source and control loop comprise power supply, air switch, combined floodgate control loop and contactor; described power supply by the air switch with electric leakage, overcurrent and short-circuit protection after to combined floodgate control loop and contactor, then by arriving the primary side loop of direct current or A.C. welder after contactor.Described combined floodgate control loop comprises fuse, protective relay output node, switch knob, opening button, contactor coil.Described combined floodgate control loop is via fuse, and protective relay output node, switch knob, opening button arrive contactor coil, wherein on switch knob, are parallel with the self-insurance node of contactor.
Compared with prior art, the beneficial effect that the utility model is obtained is: at two output (welding grounds of electric welding machine secondary side, electrode holder line) and between handle (the direct contact site of operating personnel) increase an electric shock detection control unit, this electric shock detection control unit can detect in real time the resistance value between electric welding machine secondary side and operating personnel in welding or unloaded process, when resistance value presets standard value lower than certain, utmost point short time internal cutting off electric welding machine primary side power supply (time can be set), make electric shock personnel hightail danger, only at manual reset, and when detection earth resistance is up to specification, could again open electric welding machine.This electric shock protection device for electric welding machine is simple in structure, with low cost, easy to manufacture and handling safety is reliable; can detect sensitive, accurately the resistance value between welding personnel and electric welding machine secondary side loop, the current value that flows through human body, the safe voltage causing to human body etc.; while reaching trip condition; can rapidly, reliably cut off welder power, the object of the personal security of guaranteeing to get an electric shock.
Accompanying drawing explanation
Fig. 1 is that electric shock of the present utility model detects control chart;
Fig. 2 is monolithic processor control device control system figure of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.
Fig. 1 and Fig. 2 show a kind of electric shock protection device for electric welding machine of the utility model, and this device comprises monolithic processor control device 9, clock pulses control module 13, light emitting diode control module 10,11, earth leakage protective control module 14, failure reset control module 12, electric shock detection control unit 4,7.Described monolithic processor control device 9 can be ATmega16 type single-chip microcomputer (pin number is preferably 40), can also be other model single-chip microcomputers, PLC Programmable Logic Controller or other control systems.Wherein, 10 in described monolithic processor control device 9
#, 30
#pin is power input, and described supply voltage is all preferably 5V; 11
#, 31
#pin ground connection; Described clock pulses control module 13, light emitting diode control module 10,11, earth leakage protective control module 14, failure reset control module 12, electric shock detection control unit 4,7 are all connected with described monolithic processor control device 9 circuit.Described clock pulses control module 13 comprises crystal oscillator Y1 and capacitor C 2, C3, in described monolithic processor control device 9 12
#, 13
#the external crystal oscillator Y1 of pin and two capacitor C 2, C3 parallel connection as shown in Figure 2 circuit connect, and for clock pulses being provided to monolithic processor control device 9, guarantee that monolithic processor control device 9 can normally move.Described light emitting diode control module 10,11 comprises resistance, light emitting diode and power supply, in described monolithic processor control device 9 27
#, 28
#pin respectively by resistance R 3, R4 and light emitting diode D3, D4 separately and preferably 5V power supply as shown in Figure 2 circuit be connected, the control of realization to light emitting diode D3, D4, is used to refer to duty (glimmering during work) and action indication (being lit during leakage tripping).Described earth leakage protective control module 14 comprises auxiliary reclay J, photoelectrical coupler U2, resistance R 2, preferred 5V power supply and earth leakage protective output relay; described auxiliary reclay J, photoelectrical coupler U2, resistance R 2 are connected with power circuit, in described monolithic processor control device 94
#pin by photoelectrical coupler U2, resistance R 2, auxiliary reclay J coil and power supply as shown in Figure 2 circuit be connected, realize the control to earth leakage protective output relay.Described failure reset control module 12 comprises resistance R 5, button switch K 1 and preferred 5V power supply, in described monolithic processor control device 9 22
#pin by R5, button K1 and VDD-to-VSS as shown in Figure 2 circuit be connected, realize failure reset input function.Described electric shock detection control unit 4,7 is 40
#pin is for detection of the voltage on sampling resistor, and has corresponding program to be responsible for carrying out the functions such as analog-to-digital conversion, contrast, analysis, judgement, thereby realizes the real-time detection of human body resistance.Described electric shock detection control unit 4,7 comprises primary power source and control loop 7 and secondary side circuit 4; for detecting in real time insulaion resistance; while presetting standard value lower than insulaion resistance; it is 1-3 kilo-ohm that described insulaion resistance presets standard value; be preferably 2 kilo-ohms; cut off immediately electric welding machine 5 power supplys, thereby guarantee the object of protection personal safety.
As shown in Figure 1, described primary power source and control loop 7 comprise power supply, air switch DL, combined floodgate control loop and contactor M.In described primary power source and control loop 7, power supply preferably adopts the power voltage supplies such as 220V or 380V; by arriving combined floodgate control loop and contactor M after the air switch DL with electric leakage, overcurrent and short-circuit protection, by arriving the primary side loop 6 of direct current or A.C. welder 5 after contactor M.Wherein, described combined floodgate control loop comprises fuse FU, protective relay output node J (often opening), switch knob H (often opening), opening button F (normally closed), contactor coil M.Described combined floodgate control loop is via fuse FU; protective relay output node J (often opening), switch knob H (often opening), opening button F (normally closed) arrive contactor coil M, wherein on switch knob H, are parallel with contactor M self-insurance node (often opening).
The control core forming when monolithic processor control device 9 detects to be possessed after combined floodgate condition, closure is protected to node J, press in the case after switch knob H, contactor M is by charged adhesive, contactor M self-insurance node is closed, after guaranteeing to unclamp switch knob H, still can maintain the adhesive of contactor M, the charged work of electric welding machine 5; When electric shock fault being detected or reaching after trip condition, controller will disconnect protection node J, and contactor M dead electricity node disconnects, disjunction the power supply of electric welding machine 5, thereby realize trip protection function; After pressing opening button F, contactor M dead electricity node disconnects, disjunction the power supply of electric welding machine 5, thereby realize separating brake function.
As shown in Figure 1, described secondary is surveyed 8 loops 4 and is comprised additional dc power supply E1, commutation diode D5, D6, current-limiting resistance R6, R7, sampling resistor R8 and soldering turret 2, it is by additional dc power supply E1, by commutation diode D5, D6 respectively with current-limiting resistance R6, R7 separately as shown in Figure 1 circuit be connected, be connected with earth connection circuit with electrode holder line respectively, one end is connected to by sampling resistor R8 and on the sheet metal of soldering turret 2, realizes and being connected of human body in addition again.
When between weld job personnel human body and soldering turret line, backflow earth connection during resistance variations; the upper ADR voltage detecting of sampling resistor R8 will change thereupon; deliver to controller carry out analog-to-digital conversion and analyze, the processing such as contrast; when reaching certain and presetting standard value; to control protective relay J action tripping operation, thereby realize creepage protection function.
This electric shock protection device for electric welding machine operation principle is:
Welding personnel is given before welded part 3 welding by welding rod 1, inspection possesses after condition of work, air switch DL closes, single-chip computer control system obtains after electric and starts working, it is electric and through two diode D5 that additional dc power supply E1 obtains, D6 and current-limiting resistance R6, R7 and sampling resistor R8, DC voltage is appended on welding personnel and soldering turret 2 (electrode holder line) or welded piece 3 (ground connection return wire), after 2 resistance values of human body and welded part 3 or soldering turret (this value of run duration Real-Time Monitoring) are up to specification, by closed auxiliary reclay J, possessed combined floodgate condition, this is that welding personnel is pressed after switch knob H, contactor M is by charged adhesive, the auxiliary node M of contactor thereupon closed self-insurance switch knob H, at this moment welding personnel welder just can start to carry out weld job after unclamping switch knob H.In welding process due to temperature is high or operate the reason personnel such as lack of standardization touch soldering turret 2, welded 3 or resistance lower when following to safety value; when protector will disconnect rapidly auxiliary reclay J; contactor M power failure tripping, thus the power supply of disconnection electric welding machine is guaranteed personal safety.When welding personnel is wanted to continue welding; need press failure reset button K1 (or disjunction DL air switch more again power transmission); this electric shock protection device for electric welding machine carries out insulaion resistance detection by repetition said process; after satisfying the requirements, by closed auxiliary reclay J, at this moment welding personnel can continue welding job after again pressing switch knob H.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-mentioned embodiment, in the ken possessing those of ordinary skills, can also makes many variations to it.
Claims (8)
1. an electric shock protection device for electric welding machine, comprises monolithic processor control device, clock pulses control module, light emitting diode control module, earth leakage protective control module, failure reset control module; Two pins in described monolithic processor control device are power input, two pin ground connection; Described clock pulses control module, light emitting diode control module, earth leakage protective control module, failure reset control module are all connected with described monolithic processor control device; Described clock pulses control module comprises crystal oscillator and electric capacity, and the external described crystal oscillator of described monolithic processor control device two pins and two Capacitance parallel connection circuit connect; Described light emitting diode control module comprises two resistance, two light emitting diodes and power supply, and described two resistance are connected with power circuit with light emitting diode separately respectively; Described earth leakage protective control module comprises photoelectrical coupler, resistance, power supply and earth leakage protective output relay, and described photoelectrical coupler, resistance, power supply and earth leakage protective output relay circuit are connected; Described failure reset control module comprises resistance, press button and power supply; described resistance, press button are connected with VDD-to-VSS circuit; it is characterized in that: also comprise electric shock detection control unit; described electric shock detection control unit comprises primary power source and control loop and secondary side circuit; and be connected with described monolithic processor control device, for detecting in real time insulaion resistance, while presetting standard value lower than insulaion resistance; cut off immediately welder power, guarantee to protect personal safety.
2. electric shock protection device for electric welding machine as claimed in claim 1; it is characterized in that: described secondary survey time road comprises additional dc power supply, commutation diode, current-limiting resistance, sampling resistor and soldering turret; described secondary detection loop is by additional dc power supply; by commutation diode, be connected with current-limiting resistance circuit separately respectively; be connected with earth connection with electrode holder line respectively, the other end is received on the sheet metal of soldering turret by sampling resistor again.
3. electric shock protection device for electric welding machine as claimed in claim 1 or 2; it is characterized in that: described primary power source and control loop comprise power supply, air switch, combined floodgate control loop and contactor; described power supply arrives combined floodgate control loop and contactor by air switch, then by contactor, arrives the primary side loop of direct current or A.C. welder.
4. electric shock protection device for electric welding machine as claimed in claim 3; it is characterized in that: described combined floodgate control loop comprises fuse, protective relay output node, switch knob, opening button, contactor coil; described combined floodgate control loop is via fuse; protective relay output node, switch knob, opening button arrive contactor coil, wherein on switch knob, are parallel with the self-insurance node of contactor.
5. electric shock protection device for electric welding machine as claimed in claim 1 or 2, is characterized in that: it is 2 kilo-ohms that described insulaion resistance presets standard value.
6. electric shock protection device for electric welding machine as claimed in claim 3, is characterized in that: it is 2 kilo-ohms that described insulaion resistance presets standard value.
7. electric shock protection device for electric welding machine as claimed in claim 1 or 2, is characterized in that: described monolithic processor control device is single-chip microcomputer, PLC Programmable Logic Controller or control device.
8. electric shock protection device for electric welding machine as claimed in claim 7, is characterized in that: described single-chip microcomputer is ATmega16 type single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420432668.9U CN203944977U (en) | 2014-07-25 | 2014-07-25 | Electric shock protection device for electric welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420432668.9U CN203944977U (en) | 2014-07-25 | 2014-07-25 | Electric shock protection device for electric welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203944977U true CN203944977U (en) | 2014-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420432668.9U Withdrawn - After Issue CN203944977U (en) | 2014-07-25 | 2014-07-25 | Electric shock protection device for electric welding machine |
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| Country | Link |
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| CN (1) | CN203944977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104096949A (en) * | 2014-07-25 | 2014-10-15 | 丁少华 | Anti-electric-shock protection device for electric welding machine |
-
2014
- 2014-07-25 CN CN201420432668.9U patent/CN203944977U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104096949A (en) * | 2014-07-25 | 2014-10-15 | 丁少华 | Anti-electric-shock protection device for electric welding machine |
| CN104096949B (en) * | 2014-07-25 | 2015-12-30 | 丁少华 | Electric shock protection device for electric welding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141119 Effective date of abandoning: 20151230 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |