CN102350570A - Protection device for electric welder - Google Patents
Protection device for electric welder Download PDFInfo
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- CN102350570A CN102350570A CN2011102852002A CN201110285200A CN102350570A CN 102350570 A CN102350570 A CN 102350570A CN 2011102852002 A CN2011102852002 A CN 2011102852002A CN 201110285200 A CN201110285200 A CN 201110285200A CN 102350570 A CN102350570 A CN 102350570A
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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
The used single head AC welding set of factory, bull combined type are handed over, all there is following defective in straight dual-purpose welding machine: during turn-on current under situation about not freezing; Tap just has 67V alternating current or 67V direct current over the ground; This voltage surpasses safe voltage; Cause electric shock accidents easily; Consumed power wastes energy simultaneously; Electric current also has 7 amperes when unloaded, and when aboard ship constructing, if leading line is pounded shorted to earth, long-time shorted to earth can cause burning of welding machine under the situation that nobody knows; And the starting the arc before entering work is very slow, and operating efficiency is low.
Summary of the invention
The objective of the invention is to overcome the defective 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 unloaded power consumption of welding machine and leading line length phase shorted to earth cause welding machine to burn out.
For realizing above-mentioned purpose, the electric welding machine protective device of the present invention's design comprises control starting the arc relay, no-load protection relay, leading line ground(preference) relay, the time relay, starting button, main power source contactor, control transformer;
Said control transformer is connected in parallel on two inputs of electric welding machine, and the coil of the normally-closed contact of said starting button, the time relay, control starting the arc relay is connected in series on the output loop of control transformer BK;
The normally opened contact of said no-load protection relay, the coil of the time relay are connected in series, and are connected in parallel with circuit two ends that the coil of the normally-closed contact of the time relay and control starting the arc relay is connected in series;
The two ends of the normally opened contact of said no-load protection relay are connected in parallel to the normally opened contact of the time relay and the normally-closed contact of leading line ground(preference) relay respectively;
The normally opened contact of said main power source contactor is connected in series on electric welding machine and the circuit that power supply is connected; The coil of said power contactor is connected in series back parallelly connected with two inputs of control transformer with the normally opened contact of control starting the arc relay;
Be connected in two outputs of electric welding machine after the coil of said no-load protection relay and resistance are connected in series in parallel, be connected in two outputs of electric welding machine after the coil of said leading line ground(preference) relay and resistance are connected in series in parallel.
In technique scheme, be connected with power supply with second switch through first switch respectively at two inputs of said device.
In technique scheme, on two inputs of transformer and first switch and circuit that second switch is connected, be connected with first fuse and second fuse respectively.
In technique scheme, said resistance is slide rheostat.
The present invention has the following advantages:
1, no-load current is minimum, less than 0.003A, and energy savings effectively;
2, welding machine rises lonely fast;
3, has 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 practiced thrift the energy, and can cut off the electricity supply automatically at leading line shorted to earth; Play the protective effect of leading line shorted to earth, reliable operation, and when breaking down; Maintenance failure is searched easily, and is easy to maintenance, is applicable to various types of electric welding machines.
Description of drawings
Fig. 1 is the circuit diagram of better embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
Electric welding machine protective device as shown in Figure 1 comprises control 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 coil of the normally-closed contact of starting button SA, time relay sj, control starting the arc relay J C1 is connected in series on the output loop of control transformer BK; The normally opened contact of no-load protection relay J C2, the coil of time relay sj are connected in series, and are connected in parallel with circuit two ends that the coil of the normally-closed contact of time relay sj and control starting the arc relay J C1 is 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 electric welding machine DH and the circuit that power supply is connected; The coil of said main power source contactor JC is connected in series back parallelly connected with two inputs of control transformer BK with the normally opened contact of control starting the arc relay J C1; Be connected in two outputs of electric welding machine DH after the coil of no-load protection relay J C2 and resistance R 1 are connected in series in parallel, resistance R 1 is a 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 through first K switch 1 respectively; On two inputs of control transformer BK and first K switch 1 and circuit that second switch K2 is connected, be connected with the first fuse FU1 and the second fuse FU2 respectively.
Operation principle of the present invention is following:
Behind the earth leakage circuit-breaker that closes, when welding machine insulate when undesired, K switch 1, K2 jump disconnection, and welding machine must not can not be started by electricity; When welding machine insulate normal; Welding machine gets electric, welding startup work, and control transformer BK gets; And the control voltage of output 26V; Behind the first-class welding rod of the personnel of freezing, when pinning the starting button SA on the faucet handles, the coil of control starting the arc relay J C1 gets electronic work; Make the normally opened contact of control starting the arc relay J C1 closed; Make main power source contactor JC coil get electronic work, main power source contactor JC normally opened contact is closed, makes electric welding machine DH get electric freezing; When unclamping starting button SA, the coil losing electricity of control starting the arc relay J C1, the normally opened contact of control starting the arc relay J C1 breaks off, and makes the coil losing electricity of main power source contactor JC, and the normally opened contact of main power source contactor JC1 breaks off electric welding machine DH outage is quit work.
The welder operates the power supply that starting button SA on the faucet handles controls welding machine.The leading 67V floating voltage of electric welding machine DH at this moment 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; Electric welding machine DH is gone up unloaded high voltage dividing potential drop; Adhesive when voltage is the 24V left and right sides on the coil of no-load protection relay J C2; The normally opened contact of no-load protection relay J C2 is closed; Make the coil of time relay sj get electronic picking up counting; Open the time relay sj normally-closed contact to the time of setting; Make the coil losing electricity control electric welding machine DH outage of control starting the arc relay J C1; When two heart yearns of starting button SA because of other reason causes the short circuit electric welding machine also can outage automatically in setting-up time, keep away that 67V voltage causes electric shock on the rabbit tap.When the faucet lines due to other causes short-circuit low voltage welding DH make JC3 leading wire grounding protection relay coil power loss, when the welding voltage is 34V when welding DH about JC3 leading wire grounding protection relay coil pull, If the leading welding wire is shorted to ground voltage is only 0-5 volts, leading wire grounding protection relay coil power loss JC3, leading JC3 wire grounding protection relay normally closed contact is closed, (in parallel with the resistor R2 on the leading line JC3 ground protection relay coils play a protective role against JC3 leading wire grounding protection relay coil at a high-load voltage state burned), the time delay relay coil is energized to open SJ SJ time relay normally closed contact, since the control JC1 relay coil energized arc welder power to stop the work, time delay relay SJ closed, no-load protection relay normally open contact JC2 role to play to protect themselves; when the time relay SJ action makes welding DH power outage, Only release the Start button and then press the SA to work, making the DH in the control arc welding, no-load, leading wire grounded three states can play a protective role.
The present invention has reduced welding machine no-load current, voltage, has practiced thrift the energy, and reliable operation, and when breaking down, maintenance failure is searched easily, and is easy to maintenance, is applicable to various types of electric welding machines.
The content that this specification is not done to describe in detail belongs to this area professional and technical personnel's known prior art.
What describe in the foregoing description and the specification is basic principle of the present invention, is not breaking away under the spirit and scope of the present invention, and improvement of the present invention and variation all drop within protection scope of the present invention.
Claims (4)
1. an electric welding machine protective device is characterized in that: comprise 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);
Said control transformer (BK) is connected in parallel on two inputs of electric welding machine (DH), and the coil of the normally-closed contact of said starting button (SA), the time relay (SJ), control starting the arc relay (JC1) is connected in series on the output loop of control transformer (BK);
The coil of the normally opened contact of said no-load protection relay (JC2), the time relay (SJ) is connected in series, and is connected in parallel with circuit two ends that the coil of the normally-closed contact of the time relay (SJ) and control starting the arc relay (JC1) is connected in series;
The two ends of the normally opened contact of said 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 said main power source contactor (JC) is connected in series on electric welding machine (DH) and the circuit that power supply is connected; The coil of said main power source contactor (JC) is connected in series back parallelly connected with two inputs of control transformer (BK) with the normally opened contact of control starting the arc relay (JC1);
Be connected in two outputs of electric welding machine (DH) after the coil of said no-load protection relay (JC2) and resistance (R1) are connected in series in parallel, be connected in two outputs of electric welding machine (DH) after the coil of said leading line ground(preference) relay (JC3) and resistance (R2) are connected in series in parallel.
2. electric welding machine protective device according to claim 1 is characterized in that: two inputs at said control transformer (BK) are connected with power supply with second switch (K2) through first switch (K1) respectively.
3. electric welding machine protective device according to claim 3 is characterized in that: on two inputs of said control transformer (BK) and first switch (K1) and circuit that second switch (K2) is connected, be connected with first fuse (FU1) and second fuse (FU2) respectively.
4. according to each described electric welding machine protective device of claim 1-3, it is characterized in that: said 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 true CN102350570A (en) | 2012-02-15 |
| CN102350570B CN102350570B (en) | 2014-10-22 |
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Family Applications (1)
| 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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| Country | Link |
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| CN (1) | CN102350570B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928753A (en) * | 2012-11-12 | 2013-02-13 | 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 |
Non-Patent Citations (1)
| Title |
|---|
| 陈瑞阳等: "《机电控制技术》", 30 November 2010, 高等教育出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928753A (en) * | 2012-11-12 | 2013-02-13 | 小原(南京)机电有限公司 | Inverter welding machine middle frequency insulation detection device |
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| CN102350570B (en) | 2014-10-22 |
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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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Granted publication date: 20141022 Termination date: 20180923 |
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