CN202291764U - Electric welding machine protective device - Google Patents
Electric welding machine protective device Download PDFInfo
- Publication number
- CN202291764U CN202291764U CN201120359422XU CN201120359422U CN202291764U CN 202291764 U CN202291764 U CN 202291764U CN 201120359422X U CN201120359422X U CN 201120359422XU CN 201120359422 U CN201120359422 U CN 201120359422U CN 202291764 U CN202291764 U CN 202291764U
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- relay
- welding machine
- electric welding
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Abstract
The utility model discloses an electric welding machine protective device, which includes an arching control relay, a non-load protection relay, an electrode holder line grounding protection relay, a time relay, a start button, a main power source contactor and a control transformer. By controlling the relays, the normally-open/normally closed contacts of the contactor and the on-off of a coil, the electric welding machine DH can have the protection action in controlling the arching, the non-load and the electrode holder line grounding. The electric welding machine protective device reduces the non-load current and voltage of the welding machine, saves the energy, is reliable to work, is easy to find the failure in case of failure, is convenient to maintain, and is applicable to any types of electric welding machines.
Description
Technical field
The utility model relates to electric welding machine, relates 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 purpose of the utility model is the defective that overcomes 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 utility model 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 control transformer.
In technique scheme, on two inputs of said control 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 utlity model has following advantage:
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 utility model 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; Easy to maintenance, be applicable to various types of electric welding machines.
Description of drawings
Fig. 1 is the circuit diagram of the utility model preferred embodiments.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe in 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.
The operation principle of the utility model 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 insulation is normal, welding machine gets electric, welding startup work; Control transformer BK gets electric, 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, makes 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, and 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.The low-voltage of electric welding machine DH makes the coil losing electricity of leading line ground(preference) relay JC3 when leading line causes short circuit because of other reason; Electric welding machine DH voltage is about 34V when freezing; The coil adhesive of tap line ground(preference) relay JC3; If welding machine voltage has only about 0 to 5 volt during leading line shorted to earth, the coil losing electricity of leading line ground(preference) relay JC3, the normally-closed contact of leading line ground(preference) relay JC3 is closed; (leading line ground(preference) relay JC3 coil is played a protective role with its parallel resistor R2; Prevent that leading line ground(preference) relay JC3 coil from burning under high floating voltage state), make time relay coil SJ get electric Time Delay Opening time relay sj normally-closed contact, make control starting the arc relay J C1 coil losing electricity that the welding machine outage is quit work; Time relay sj timing closing, the normally opened contact of no-load protection relay J C2 plays holding function; When time relay sj action makes electric welding machine DH outage, only unclamp behind the starting button SA again by could operate as normal, make electric welding machine DH under the control starting the arc, zero load, three kinds of states of leading line ground connection, can both play a protective role.
The utility model 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.
The just basic principle of describing in the foregoing description and the specification of the utility model, under spirit that does not break away from the utility model and scope, improvement of the utility model and variation all drop within the protection domain of the utility model.
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 1 and 2 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 |
|---|---|---|---|
| CN201120359422XU CN202291764U (en) | 2011-09-23 | 2011-09-23 | Electric welding machine protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120359422XU CN202291764U (en) | 2011-09-23 | 2011-09-23 | Electric welding machine protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202291764U true CN202291764U (en) | 2012-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120359422XU Withdrawn - After Issue CN202291764U (en) | 2011-09-23 | 2011-09-23 | Electric welding machine protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202291764U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350570A (en) * | 2011-09-23 | 2012-02-15 | 中国长江航运集团青山船厂 | Protection device for electric welder |
| CN102974919A (en) * | 2012-12-18 | 2013-03-20 | 云南昆钢重型装备制造集团有限公司 | Energy-saving overheat protection device of electric welder |
| CN107538107A (en) * | 2016-06-23 | 2018-01-05 | 上海安莱德汽车零部件有限公司 | A kind of welding gun isolated from power protection device |
| CN107971609A (en) * | 2018-01-16 | 2018-05-01 | 河南省黄河防爆起重机有限公司 | A kind of no-load economizer for electric welding machine |
-
2011
- 2011-09-23 CN CN201120359422XU patent/CN202291764U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350570A (en) * | 2011-09-23 | 2012-02-15 | 中国长江航运集团青山船厂 | Protection device for electric welder |
| CN102350570B (en) * | 2011-09-23 | 2014-10-22 | 中国长江航运集团青山船厂 | Protection device for electric welder |
| CN102974919A (en) * | 2012-12-18 | 2013-03-20 | 云南昆钢重型装备制造集团有限公司 | Energy-saving overheat protection device of electric welder |
| CN107538107A (en) * | 2016-06-23 | 2018-01-05 | 上海安莱德汽车零部件有限公司 | A kind of welding gun isolated from power protection device |
| CN107971609A (en) * | 2018-01-16 | 2018-05-01 | 河南省黄河防爆起重机有限公司 | A kind of no-load economizer for electric welding machine |
| CN107971609B (en) * | 2018-01-16 | 2024-03-08 | 河南省黄河防爆起重机有限公司 | No-load energy-saving device of 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: 20120704 Effective date of abandoning: 20141022 |
|
| RGAV | Abandon patent right to avoid regrant |