CN203636179U - Protective device for electric welding machine - Google Patents
Protective device for electric welding machine Download PDFInfo
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- CN203636179U CN203636179U CN201320879053.6U CN201320879053U CN203636179U CN 203636179 U CN203636179 U CN 203636179U CN 201320879053 U CN201320879053 U CN 201320879053U CN 203636179 U CN203636179 U CN 203636179U
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- welding machine
- electric welding
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Abstract
The utility model provides a protective device for an electric welding machine. The protective device for the electric welding machine comprises a current collection circuit, a comparison circuit and a control signal generation circuit, wherein the current collection circuit is used for collecting a voltage value and a current value of a current on the secondary side of the electric welding machine, the current collection circuit is arranged in a loop of a welding line and a grounding line on the secondary side of the electric welding machine, the comparison circuit is used for generating a set status signal when the voltage value and the current value conform to the preset range value, the control signal generation circuit is used for generating a control signal according to the set status signal, and the control signal is used for turning off a control power supply output by the secondary side. According to the protective device for the electric welding machine, the control signal for turning off the control power supply output by the secondary side can be automatically generated when the electric welding machine is in the electric shock status, and therefore the potential safety hazard that a welder possibly gets an electric shock is eliminated.
Description
Technical field
The utility model relates to engine art, in particular, relates to a kind of electric welding machine protective device.
Background technology
The principle of electric welding machine is that the high-temperature electric arc that utilizes positive and negative polarities to produce in the time of instantaneous short circuit carrys out scolder and the materials to be welded on consumable electrode, reaches the object that makes their combinations.
Electric welding machine generally can comprise a powerful transformer, by higher voltage electricity source electric current being become to the large electric current of low-voltage, the principle of recycling inductance,, utilize inductance value in the time switching on and off, to produce huge voltage change, thereby make positive and negative polarities can produce high-voltage arc in the time of instantaneous short circuit, by the solder fusing on welding rod, reach the object that makes soldered parts combination by high-voltage arc.
Electric welding machine generally can be divided into dc welding machine and A.C. welder, wherein, dc welding machine in use, can may be because the other reasonses such as the humidity of environment or welder's maloperation cause welder's electric shock, thereby bring great potential safety hazard.
Utility model content
In view of this, the utility model provides a kind of electric welding machine protective device, the object of existing potential safety hazard while eliminating use dc welding machine to realize.
For achieving the above object, the utility model provides following technical scheme:
A kind of electric welding machine protective device, comprising:
Current collection circuit, for gathering magnitude of voltage and the current value of secondary side current of described electric welding machine;
Described current acquisition electric current is located in the electrode holder line of described electric welding machine secondary side and the loop of earth connection;
Comparison circuit, in the time that described magnitude of voltage and current value meet preset range value, generates the status signal of setting; Described preset range value is in the time that described electric welding machine is electric shock state, the interval range value of the magnitude of voltage of described secondary side current and current value;
Control signal generative circuit, for generating control signal according to the status signal of described setting, described control signal is for cutting off the control power supply of described secondary side output.
Preferably, in the utility model embodiment, described preset range value, comprising:
Magnitude of voltage is 80V to 85V, and current value is 3ma to 5ma.
Preferably, in the utility model embodiment, described current collection circuit, comprising:
Current transformer, for responding to the electric current of secondary side of described electric welding machine;
Electric current correcting module, for generating described magnitude of voltage and described current value after described current filtering, voltage stabilizing and coupling.
Preferably, in the utility model embodiment, described comparison circuit comprises:
Comparator.
Preferably, in the utility model embodiment, described control signal generative circuit, comprising:
Signal amplifier, for amplifying to generate described control signal by the status signal of described setting.
Preferably, in the utility model embodiment, described control signal generation unit is connected with the control panel of the secondary side output of described electric welding machine.
Preferably, in the utility model embodiment, described control signal generative circuit also comprises:
Time delay module, for existing after setting-up time when the status signal of described setting, is sent to described signal amplifier by described logic state signal.
Known via above-mentioned technical scheme, the current characteristic of the utility model embodiment secondary side of electric welding machine during take electric welding machine electric shock state is as basis for estimation, when having preset electric welding machine and being electric shock state, the interval range value of the magnitude of voltage of described secondary side current and current value, magnitude of voltage and the described current value of the electric current by the real-time secondary side that obtains electric welding machine judge whether electric welding machine is electric shock state, and can generate automatically the control signal of the control power supply for cutting off secondary side output during in electric shock state at electric welding machine, thereby eliminate the potential safety hazard of the possible electric shock of welder.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 is the structural representation of electric welding machine protective device described in the utility model embodiment;
Fig. 2 is the another structural representation of electric welding machine protective device described in the utility model embodiment.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of electric welding machine protective device, as shown in Figure 1, comprises current collection circuit 02, comparison circuit 03 and control signal generative circuit 04, wherein:
Magnitude of voltage and the current value of current collection circuit 02 for gathering; Current collection circuit 02 is located in the electrode holder line of secondary side and the loop of earth connection of electric welding machine 01; Comparison circuit 03, in the time that magnitude of voltage and current value meet preset range value, generates the status signal of setting; Preset range value is in the time that electric welding machine 01 is electric shock state, the interval range value of the magnitude of voltage of secondary side current and current value; Control signal generative circuit 04 is for generating control signal according to the judged result of comparison circuit 03, and control signal is used for the control power supply of the secondary side output of cutting off electric welding machine 01.
Utility model people finds through research, for dc welding machine, when electric welding machine is during in electric shock state, the secondary side current of electric welding machine can, in the specific current characteristics of one, that is to say, the current value of the secondary side current of electric welding machine now and magnitude of voltage are in certain interval range value, for this reason, in the utility model embodiment, this interval range value is made as to preset range value, so that judge thus whether electric welding machine is electric shock state.
In actual applications, the current characteristics of the secondary side current of typical dc welding machine comprises: in the time of normal operating conditions, the voltage of the secondary side current of electric welding machine is 50V left and right, and electric current is 40A left and right; In the time that dc welding machine is Light Condition duty (, while welding), the voltage of the secondary side current of electric welding machine is 24V left and right, electric current is 0; And when electric welding machine be during for electric shock state, the voltage of the secondary side current of electric welding machine is in being 80V to 85V, and current value is in 3ma to 5ma scope, for this reason, in the utility model embodiment, preferably preset range value being made as to magnitude of voltage is 80V to 85V, and current value is 3ma to 5ma.
In order to obtain the current characteristics of secondary side current of electric welding machine, the utility model embodiment has been provided with current collection circuit 02 in the electrode holder line of the secondary side of electric welding machine 01 and the loop of earth connection, to gather magnitude of voltage and the current value of secondary side current of described electric welding machine 01; Further, current collection circuit 02 specifically can comprise current transformer and electric current correcting module, like this, after the electric current of the secondary side of current transformer induced electricity welding machine, then through overcurrent correcting module, this electric current is carried out generating after filtering, voltage stabilizing and coupling magnitude of voltage and the current value of standard.
Obtaining after the magnitude of voltage and current value of secondary side current, whether comparison circuit 03 meets preset range value according to magnitude of voltage and current value, judges that whether electric welding machine 01 is in electric shock state; Concrete, in the time that magnitude of voltage and current value meet preset range value, generate the status signal of setting, now, show that electric welding machine 01 is in electric shock state.In actual applications, comparison circuit 03 can be specifically comparator, like this by the magnitude of voltage and the current value that relatively collect, when magnitude of voltage and current value are in preset range value, generate the status signal of setting,,, in the time that electric welding machine 01 is electric shock state, comparator will generate the status signal of setting at once.
In order to control the control power supply of the secondary side output of electric welding machine 01, also need to generate control signal according to the judged result of comparison circuit 03, like this, as long as when electric welding machine 01 is electric shock state, will generate the control power control signal of the secondary side output for cutting off electric welding machine 01, thereby avoid welder to get an electric shock.
Preferably, control signal generative circuit 04 specifically can comprise signal amplifier, like this, pass through signal amplifier, the status signal of setting is amplified to generate the control signal that can control controlling power supply, because control signal generation unit can be connected with the control panel of the secondary side output of electric welding machine, so control panel just can cut off according to control signal the control power supply of secondary side output.
Further, in the utility model embodiment, control signal generative circuit 01 can also comprise time delay module; Time delay module is used for existing after setting-up time when the status signal of setting, then the status signal of setting is sent to signal amplifier, and then signal amplifier amplifies to generate control signal by the status signal of setting again.Because the having of secondary side current of electric welding machine may be under certain non-electric shock state, in instantaneous time range in preset range value, cut off if now generate at once control signal the control power supply that secondary side is exported, will cause erroneous judgement, for this reason, in the utility model embodiment, by being provided with time delay module, postpone the generation of control signal, when only the magnitude of voltage of secondary side current and current value all meet preset range value in setting-up time section, just judge that this electric welding machine is electric shock state.
In actual applications, the preferred structure of the utility model embodiment can be as shown in Figure 2, and its operation principle is:
After the electric current of the secondary side of the current transformer 21 induced electricity welding machines 01 in current collection circuit 02, the magnitude of voltage and the current value that through overcurrent correcting module 22, this electric current are carried out generating after filtering, voltage stabilizing and coupling standard gather described electric welding machine 01 than specifically comprising current transformer and electric current correcting module again, like this, after the electric current of the secondary side of current transformer induced electricity welding machine, then through overcurrent correcting module, this electric current is carried out generating after filtering, voltage stabilizing and coupling magnitude of voltage and the current value of standard.Then, whether come comparing voltage value and current value in preset range value by comparator 31, generate the status signal of setting, that is, when electric welding machine 01 is during for electric shock state, comparator 31 will generate the status signal of setting at once.The status signal that time delay module 41 in control signal generative circuit 04 receives setting reached after the time of setting, illustrate that now electric welding machine 01 is defined as in electric shock state, now, time delay module 41 is sent to signal amplifier 42 by the status signal of setting again, signal amplifier 42 amplifies to generate control signal by the status signal of setting again, and then the control power control signal that cuts off the secondary side output of electric welding machine 01, to avoid welder to get an electric shock.
In sum, the current characteristic of the utility model embodiment secondary side of electric welding machine during take electric welding machine electric shock state is as basis for estimation, when having preset electric welding machine and being electric shock state, the interval range value of the magnitude of voltage of described secondary side current and current value, magnitude of voltage and the described current value of the electric current by the real-time secondary side that obtains electric welding machine judge whether electric welding machine is electric shock state, and can generate automatically the control signal of the control power supply for cutting off secondary side output during in electric shock state at electric welding machine, thereby eliminate the potential safety hazard of the possible electric shock of welder.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.For the device providing for embodiment, because its method providing with embodiment is corresponding, so description is fairly simple, relevant part illustrates referring to method part.
To the above-mentioned explanation of provided embodiment, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle provided in this article and features of novelty.
Claims (7)
1. an electric welding machine protective device, is characterized in that, comprising:
Current collection circuit, for gathering magnitude of voltage and the current value of secondary side current of described electric welding machine;
Described current acquisition electric current is located in the electrode holder line of described electric welding machine secondary side and the loop of earth connection;
Comparison circuit, in the time that described magnitude of voltage and current value meet preset range value, generates the status signal of setting; Described preset range value is in the time that described electric welding machine is electric shock state, the interval range value of the magnitude of voltage of described secondary side current and current value;
Control signal generative circuit, for generating control signal according to the status signal of described setting, described control signal is for cutting off the control power supply of described secondary side output.
2. according to electric welding machine protective device described in claim 1, it is characterized in that, described preset range value, comprising:
Magnitude of voltage is 80V to 85V, and current value is 3ma to 5ma.
3. according to electric welding machine protective device described in claim 2, it is characterized in that, described current collection circuit, comprising:
Current transformer, for responding to the electric current of secondary side of described electric welding machine;
Electric current correcting module, for generating described magnitude of voltage and described current value after described current filtering, voltage stabilizing and coupling.
4. according to electric welding machine protective device described in claim 3, it is characterized in that, described comparison circuit, comprising:
Comparator.
5. according to electric welding machine protective device described in claim 4, it is characterized in that, described control signal generative circuit, comprising:
Signal amplifier, for amplifying to generate described control signal by the status signal of described setting.
6. according to electric welding machine protective device described in claim 5, it is characterized in that, described control signal generation unit is connected with the control panel of the secondary side output of described electric welding machine.
7. according to electric welding machine protective device described in claim 6, it is characterized in that, described control signal generative circuit also comprises:
Time delay module, for existing after setting-up time when the status signal of described setting, is sent to described signal amplifier by described logic state signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879053.6U CN203636179U (en) | 2013-12-27 | 2013-12-27 | Protective device for electric welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320879053.6U CN203636179U (en) | 2013-12-27 | 2013-12-27 | Protective device for electric welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203636179U true CN203636179U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320879053.6U Withdrawn - After Issue CN203636179U (en) | 2013-12-27 | 2013-12-27 | Protective device for electric welding machine |
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| CN (1) | CN203636179U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639570A (en) * | 2013-12-27 | 2014-03-19 | 芬雷选煤工程技术(北京)有限公司 | Electric welding machine protecting device |
-
2013
- 2013-12-27 CN CN201320879053.6U patent/CN203636179U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103639570A (en) * | 2013-12-27 | 2014-03-19 | 芬雷选煤工程技术(北京)有限公司 | Electric welding machine protecting device |
| CN103639570B (en) * | 2013-12-27 | 2017-01-04 | 芬雷选煤工程技术(北京)有限公司 | A kind of electric welding machine protective device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140611 Effective date of abandoning: 20161019 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |