CN102350570B - Protection device for electric welder - Google Patents
Protection device for electric welder Download PDFInfo
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- CN102350570B CN102350570B CN201110285200.2A CN201110285200A CN102350570B CN 102350570 B CN102350570 B CN 102350570B CN 201110285200 A CN201110285200 A CN 201110285200A CN 102350570 B CN102350570 B CN 102350570B
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- relay
- welding machine
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- electric welding
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Abstract
The invention discloses a protection device for an electric welder. The protection device comprises a control arcing relay, an idle protection relay, a bibcock wire grounding protection relay, a time relay, a starting button, a main power supply contactor and a control transformer. By controlling the normally opened contacts and normally closed contacts of the relays and a contactor and the on/off state of a coil, the electric welder DH can exert a protection function in three states, namely control arcing state, idle state and bibcock wire grounding state. by the adoption of the protection device, idle current and voltage of the welder are reduced; energy is saved; work is reliable; a fault is easily searched when the fault occurs; and the protection device is convenient to maintain and is suitable for various electric welders.
Description
Technical field
The present invention relates to electric welding machine, relate in particular to no-load protection, control starting the arc protection and leading shorted to earth protective device in this electric welding machine.
Background technology
All there is following defect in factory's single head AC welding set, cross, straight dual-purpose welding machine of bull combined type used: when turn-on current in the situation that not freezing, tap just has 67V alternating current or 67V direct current over the ground, this voltage exceedes safe voltage, easily cause electric shock accidents, consume electric energy simultaneously, waste energy; When unloaded, electric current also has 7 amperes, and while aboard ship construction, if leading line is pounded shorted to earth, in the situation that nobody knows, long-time shorted to earth can cause burning of welding machine; And the starting the arc before the work of entering is very slow, and operating efficiency is low.
Summary of the invention
The object of the invention is to overcome the defect of above-mentioned existence; and provide a kind of simple in structure; can be anticreep, to unloaded and leading line shorted to earth all plays a protective role, protection against electric shock, prevent the electric welding machine protective device that the unloaded power consumption of welding machine and leading line length phase shorted to earth cause welding machine to burn out.
For achieving the above object, the electric welding machine protective device of the present invention's design, comprises and controls starting the arc relay, no-load protection relay, leading line ground(preference) relay, the time relay, starting button, main power source contactor, control transformer;
Described control transformer is connected in parallel on two inputs of electric welding machine, and the normally-closed contact of described starting button, the time relay, the coil of control starting the arc relay are connected in series on the output loop of control transformer BK;
The normally opened contact of described no-load protection relay and the coil of the time relay are connected in series, and are connected in parallel with the circuit two ends that the normally-closed contact of the time relay and the coil of control starting the arc relay are connected in series;
The two ends of the normally opened contact of described no-load protection relay are connected in parallel to respectively the normally opened contact of the time relay and the normally-closed contact of leading line ground(preference) relay;
The normally opened contact of described main power source contactor is connected in series on the circuit that electric welding machine is connected with power supply; The coil of described power contactor is in parallel with two inputs of control transformer after being connected in series with the normally opened contact of controlling starting the arc relay;
After the coil connection in series with a resistor of described no-load protection relay, be connected in two outputs of electric welding machine in parallel, after the coil connection in series with a resistor of described leading line ground(preference) relay, be connected in two outputs of electric welding machine in parallel.
In technique scheme, be connected with power supply with second switch by the first switch respectively at two inputs of described device.
In technique scheme, on the circuit being connected with the first switch and second switch at two inputs of transformer, be connected with respectively the first fuse and the second fuse.
In technique scheme, described resistance is slide rheostat.
The present invention has the following advantages:
1, no-load current is minimum, is less than 0.003A, can effectively save the energy;
2, welding machine rises lonely fast;
3, there is leading line shorted to earth defencive function;
4, this protective device main element is made up of relay, and reliable operation is convenient to maintenance;
5, this protective device can be used for the electric welding machine of any machine type.
The present invention has reduced welding machine no-load current, voltage, has saved the energy, and at leading line shorted to earth energy automatic cut-off power; play the protective effect of leading line shorted to earth, reliable operation, and in the time breaking down; maintenance failure is easily searched, easy to maintenance, is applicable to various types of electric welding machines.
Brief description of the drawings
Fig. 1 is the circuit diagram of preferred embodiments of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Electric welding machine protective device as shown in Figure 1, comprises and controls starting the arc relay J C1, no-load protection relay J C2, leading line ground(preference) relay JC3, time relay sj, starting button SA, main power source contactor JC and control transformer BK; Control transformer BK is connected in parallel on two inputs of electric welding machine DH, and the normally-closed contact of starting button SA, time relay sj, the coil of control starting the arc relay J C1 are connected in series on the output loop of control transformer BK; The normally opened contact of no-load protection relay J C2 and the coil of time relay sj are connected in series, and are connected in parallel with the circuit two ends that the normally-closed contact of time relay sj and the coil of control starting the arc relay J C1 are connected in series; The two ends of the normally opened contact of no-load protection relay J C2 be connected in parallel the respectively normally opened contact of time relay sj and the normally-closed contact of leading line ground(preference) relay JC3; The normally opened contact of main power source contactor JC is connected in series on the circuit that electric welding machine DH is connected with power supply; The coil of described main power source contactor JC is in parallel with two inputs of control transformer BK after being connected in series with the normally opened contact of controlling starting the arc relay J C1; After the coil of no-load protection relay J C2 and resistance R 1 are connected in series, be connected in two outputs of electric welding machine DH in parallel, resistance R 1 is slide rheostat.After being connected in series, the coil of tap line ground(preference) relay JC3 and resistance R 2 be connected in two outputs of electric welding machine DH in parallel.
Two inputs at control transformer BK are connected with power supply with second switch K2 by the first K switch 1 respectively; On the circuit being connected with the first K switch 1 and second switch K2 at two inputs of control transformer BK, be connected with respectively the first fuse FU1 and the second fuse FU2.
Operation principle of the present invention is as follows:
When closing after earth leakage circuit-breaker, in the time that welding machine insulating is undesired, K switch 1, K2 jump disconnection, and welding machine must not can not be started by electricity; When welding machine insulating normal, welding machine obtains electric, welding startup work, and control transformer BK obtains electric, and export the control voltage of 26V, when after the first-class welding rod of the personnel of freezing, while pinning the starting button SA in faucet handles, control the coil energized action of starting the arc relay J C1, make to control the normally opened contact closure of starting the arc relay J C1, make main power source contactor JC coil energized action, main power source contactor JC normally opened contact closure, makes electric welding machine DH obtain electric freezing; In the time unclamping starting button SA, control the coil losing electricity of starting the arc relay J C1, the normally opened contact of controlling starting the arc relay J C1 disconnects, and makes the coil losing electricity of main power source contactor JC, and the normally opened contact of main power source contactor JC disconnects electric welding machine DH power-off is quit work.
Welder operates starting button SA in faucet handles and controls the power supply of welding machine.The leading at this moment 67V floating voltage of electric welding machine DH that do not freeze over the ground when having pressed starting button SA, make the coil adhesive of no-load protection relay J C2, the resistance R 1 of series connection with it plays the effect of dividing potential drop, by upper electric welding machine DH unloaded high voltage dividing potential drop, adhesive in the time that voltage is 24V left and right on the coil of no-load protection relay J C2, the normally opened contact closure of no-load protection relay J C2, make the coil energized action of time relay sj start timing, to setting time opening time relay SJ normally-closed contact, make to control the coil losing electricity control electric welding machine DH power-off of starting the arc relay J C1, when two heart yearns of starting button SA because of other reason cause short circuit electric welding machine also can be in setting-up time auto-breaking, keep away 67V voltage on rabbit tap and cause electric shock.In the time that leading line causes short circuit because of other reason, the low-voltage of electric welding machine DH makes the coil losing electricity of leading line ground(preference) relay JC3, in the time freezing, electric welding machine DH voltage is in 34V left and right, the coil adhesive of tap line ground(preference) relay JC3, if welding machine voltage only has about 0 to 5 volt when leading line shorted to earth, the coil losing electricity of tap line ground(preference) relay JC3, the normally-closed contact closure of tap line ground(preference) relay JC3, (resistance R 2 in parallel with it plays a protective role to leading line ground(preference) relay JC3 coil, prevent that leading line ground(preference) relay JC3 coil from burning under high floating voltage state), make time relay coil SJ obtain electric Time Delay Opening time relay sj normally-closed contact, making to control starting the arc relay J C1 coil losing electricity quits work welding machine power-off, time relay sj timing closing, the normally opened contact of no-load protection relay J C2 plays holding function, in the time that time relay sj action makes electric welding machine DH power-off, only unclamp after starting button SA again by could normal work, make electric welding machine DH control under the starting the arc, zero load, three kinds of states of leading line ground connection and can play a protective role.
The present invention has reduced welding machine no-load current, voltage, has saved the energy, and reliable operation, and in the time breaking down, maintenance failure is easily searched, easy to maintenance, is applicable to various types of electric welding machines.
The content that this description is not described in detail belongs to the known prior art of professional and technical personnel in the field.
What in above-described embodiment and description, describe is general principle of the present invention, without departing from the spirit and scope of the invention, and within improvement of the present invention and variation all drop on protection scope of the present invention.
Claims (2)
1. an electric welding machine protective device, is characterized in that: comprise and control starting the arc relay (JC1), no-load protection relay (JC2), leading line ground(preference) relay (JC3), the time relay (SJ), starting button (SA), main power source contactor (JC) and control transformer (BK);
Described control transformer (BK) is connected in parallel on two inputs of electric welding machine (DH), and the normally-closed contact of described starting button (SA), the time relay (SJ), the coil of control starting the arc relay (JC1) are connected in series on the output loop of control transformer (BK);
The coil of the normally opened contact of described no-load protection relay (JC2) and the time relay (SJ) is connected in series, and is connected in parallel with the circuit two ends that the normally-closed contact of the time relay (SJ) and the coil of control starting the arc relay (JC1) are connected in series;
The two ends of the normally opened contact of described no-load protection relay (JC2) be connected in parallel the respectively normally opened contact of the time relay (SJ) and the normally-closed contact of leading line ground(preference) relay (JC3);
The normally opened contact of described main power source contactor (JC) is connected in series on the circuit that electric welding machine (DH) is connected with power supply; The coil of described main power source contactor (JC) is in parallel with two inputs of control transformer (BK) after being connected in series with the normally opened contact of controlling starting the arc relay (JC1);
After the coil of described no-load protection relay (JC2) and resistance (R1) are connected in series, be connected in two outputs of electric welding machine (DH) in parallel, after the coil of described leading line ground(preference) relay (JC3) and resistance (R2) are connected in series, be connected in two outputs of electric welding machine (DH) in parallel;
Two inputs at described control transformer (BK) are connected with power supply with second switch (K2) by the first switch (K1) respectively;
On the circuit being connected with the first switch (K1) and second switch (K2) at two inputs of described control transformer (BK), be connected with respectively the first fuse (FU1) and the second fuse (FU2).
2. according to electric welding machine protective device claimed in claim 1, it is characterized in that: described resistance (R1) is slide rheostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110285200.2A CN102350570B (en) | 2011-09-23 | 2011-09-23 | Protection device for electric welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110285200.2A CN102350570B (en) | 2011-09-23 | 2011-09-23 | Protection device for electric welder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102350570A CN102350570A (en) | 2012-02-15 |
| CN102350570B true CN102350570B (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110285200.2A Expired - Fee Related CN102350570B (en) | 2011-09-23 | 2011-09-23 | Protection device for electric welder |
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| CN (1) | CN102350570B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928753B (en) * | 2012-11-12 | 2014-10-08 | 小原(南京)机电有限公司 | Inverter welding machine middle frequency insulation detection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB803534A (en) * | 1956-05-18 | 1958-10-29 | Foster Transformers Ltd | Improvements in alternating current arc welding systems |
| CN86104447A (en) * | 1986-06-26 | 1988-01-06 | 宋峻峰 | Electric welding machine electricity saving security switch |
| CN1129626A (en) * | 1993-12-06 | 1996-08-28 | 林肯电气公司 | Method and apparatus for providing welding current from brushless alternator |
| CN1220929A (en) * | 1997-12-24 | 1999-06-30 | 丛建敏 | Electric-saving circuit of electric welder |
| CN201086173Y (en) * | 2007-09-11 | 2008-07-16 | 周克京 | Weight empty power-saving device for electric welding machine |
| CN202291764U (en) * | 2011-09-23 | 2012-07-04 | 中国长江航运集团青山船厂 | Electric welding machine protective device |
-
2011
- 2011-09-23 CN CN201110285200.2A patent/CN102350570B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB803534A (en) * | 1956-05-18 | 1958-10-29 | Foster Transformers Ltd | Improvements in alternating current arc welding systems |
| CN86104447A (en) * | 1986-06-26 | 1988-01-06 | 宋峻峰 | Electric welding machine electricity saving security switch |
| CN1129626A (en) * | 1993-12-06 | 1996-08-28 | 林肯电气公司 | Method and apparatus for providing welding current from brushless alternator |
| CN1220929A (en) * | 1997-12-24 | 1999-06-30 | 丛建敏 | Electric-saving circuit of electric welder |
| CN201086173Y (en) * | 2007-09-11 | 2008-07-16 | 周克京 | Weight empty power-saving device for electric welding machine |
| CN202291764U (en) * | 2011-09-23 | 2012-07-04 | 中国长江航运集团青山船厂 | Electric welding machine protective device |
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| Publication number | Publication date |
|---|---|
| CN102350570A (en) | 2012-02-15 |
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Address after: 430082 Hubei province Wuhan City Qingshan shipping factory new village Patentee after: Changhang group Wuhan Qingshan shipyard Co., Ltd. Address before: 430082 Qingshan boat factory village, Qingshan District, Wuhan, Hubei Patentee before: China Changjiang National Shipping Group Qingshan Ship Plant |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20180923 |
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| CF01 | Termination of patent right due to non-payment of annual fee |