CN209811423U - Electric shock-proof energy-saving device for electric welding machine - Google Patents
Electric shock-proof energy-saving device for electric welding machine Download PDFInfo
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- CN209811423U CN209811423U CN201822054960.2U CN201822054960U CN209811423U CN 209811423 U CN209811423 U CN 209811423U CN 201822054960 U CN201822054960 U CN 201822054960U CN 209811423 U CN209811423 U CN 209811423U
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Abstract
The utility model belongs to the technical field of the electric welding safety energy-saving technology and specifically relates to an electric welding protection against electric shock economizer, including electric welding T1, treat welding circuit and welding control circuit, the power reduces electric welding output voltage to safe low-voltage through treating the condenser C1 of welding circuit, and welding control circuit makes the main contact KM1-1 of treating the ac contactor of welding circuit closed, and the electric welding is got the electricity and is executed and weld. In the intermittent period of welding, the primary of the electric welding machine is automatically connected with the capacitor in series, so that the secondary voltage of the electric welding machine is greatly reduced, the safety protection effect is achieved, and the electric energy of the electric welding machine is greatly saved.
Description
Technical Field
The utility model relates to an electric welding safety energy-saving technology, especially an electric welding protection against electric shock economizer.
Background
The AC electric welding machine is an indispensable welding tool for occasions such as machinery manufacturing factories, equipment maintenance units, building construction sites and the like. The electric welding machine generally works intermittently, when welding, a large amount of electric energy is consumed, but in the intermittent period when the electric welding machine stops welding, the power consumption is generally hundreds of watts, particularly, workers forget to turn off a power switch when going off duty, and the electric welding machine always runs in a no-load mode, so that the electric energy is wasted, the power factor of a power grid is reduced, and even personal electric shock accidents are caused.
SUMMERY OF THE UTILITY MODEL
For solving the not enough of prior art, the utility model provides an electric welding protection against electric shock economizer, it can be at the intermittence phase of electric welding, and its elementary automation concatenates the condenser, makes the secondary only have several volts or tens of volts, and not only safety can practice thrift the electric energy simultaneously again greatly.
For solving the technical problem, the utility model discloses the technical scheme who adopts as follows:
an electric shock prevention energy-saving device of an electric welding machine comprises the electric welding machine T1, a circuit to be welded and a welding control circuit, wherein the output voltage of the electric welding machine is reduced to be safe low voltage by a power supply through a capacitor C1 of the circuit to be welded, a main contact KM1-1 of an alternating current contactor of the circuit to be welded is closed by the welding control circuit, and the electric welding machine is electrified to carry out welding.
Preferably, the circuit to be welded comprises a double-pole single-throw switch SA1, a fuse FU, a main contact KM1-1 of an alternating current contactor, a capacitor C1; the moving contact of the double-pole single-throw switch SA1 is respectively connected with a power bus L1 and a power bus L2; one static contact of the double-pole single-throw switch SA1 is divided into two paths after passing through the fuse FU, and one path of the static contact is connected with one end of a primary coil of an electric welding machine T1 through a main contact KM1-1 of an alternating current contactor; the other path is connected with one end of a primary coil of the electric welding machine T1 through a capacitor C1; the other end of the primary coil of the electric welding machine T1 is connected with the other stationary contact of the double-pole single-throw switch SA1 through the fuse FU; one end of the secondary coil of the welding machine T1 is connected with the welding handle, and the other end of the secondary coil of the welding machine T1 passes through a current transformer TA1 of the welding control circuit and is connected with the welding handle.
Preferably, the welding control circuit comprises a coil KM1 of an alternating current contactor, a first rectifier bridge, a unidirectional thyristor VT1, a resistor R1, a resistor R2, a second rectifier bridge and a current transformer TA 1.
One end of a coil KM1 of the alternating current contactor is connected between a main contact KM1-1 of the alternating current contactor and the fuse FU, and the other end of the coil KM1 of the alternating current contactor is connected between the anode of a diode VD1 and the cathode of the diode VD4 of the first rectifier bridge; the anode of the diode VD3 and the cathode of the diode VD2 are connected with a zero line N; the cathode of the diode VD1 and the cathode of the diode VD3 are connected with the anode of the unidirectional thyristor VT 1; the cathode of the unidirectional thyristor VT1 is connected between the anode of the diode VD6 and the anode of the diode VD8 of the second rectifier bridge; the control electrode of the unidirectional thyristor VT1 is connected between the cathode of the diode VD5 and the cathode of the diode VD7 through a resistor R1 and a resistor R2 which are connected in series; one end of the current transformer TA1 is connected between the cathode of the diode VD8 and the anode of the diode VD5, and the other end of the current transformer TA1 is connected between the cathode of the diode VD6 and the anode of the diode VD 7.
Further preferably, a capacitor C2 and a voltage regulator VS1 are connected in series between the anode of the diode VD6 and the anode of the diode VD8 and between the resistor R1 and the resistor R2.
The beneficial effects of the utility model are that, in the intermittent type phase of executing the welding, the electric welding is elementary automatic concatenates the condenser, makes electric welding secondary voltage greatly reduced, not only plays the safety protection effect, makes the electric welding practice thrift the electric energy greatly moreover.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 the utility model discloses electric welding protection against electric shock economizer schematic diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
An electric shock prevention energy-saving device of an electric welding machine is shown in figure 1 and comprises the electric welding machine T1, a circuit to be welded and a welding control circuit, wherein the output voltage of the electric welding machine is reduced to be safe low voltage by a power supply through a capacitor C1 of the circuit to be welded, a main contact KM1-1 of an alternating current contactor of the circuit to be welded is closed by the welding control circuit, and the electric welding machine is electrified to carry out welding.
Specifically, the circuit of waiting to weld of the utility model discloses a main contact KM1-1, the condenser C1 that treat circuit including double-pole single-throw SA1, fuse FU, ac contactor.
The moving contact of the double-pole single-throw switch SA1 is respectively connected with a power bus L1 and a power bus L2; one static contact of the double-pole single-throw switch SA1 is divided into two paths after passing through the fuse FU, and one path of the static contact is connected with one end of a primary coil of an electric welding machine T1 through a main contact KM1-1 of an alternating current contactor; the other path is connected with one end of a primary coil of the electric welding machine T1 through a capacitor C1; the other end of the primary coil of the electric welding machine T1 is connected with the other stationary contact of the double-pole single-throw switch SA1 through the fuse FU; one end of the secondary coil of the welding machine T1 is connected with the welding handle, and the other end of the secondary coil of the welding machine T1 passes through a current transformer TA1 of the welding control circuit and is connected with the welding handle.
The welding control circuit comprises a coil KM1 of an alternating current contactor, a first rectifier bridge, a unidirectional thyristor VT1, a resistor R1, a resistor R2, a second rectifier bridge and a current transformer TA 1.
One end of a coil KM1 of the alternating current contactor is connected between a main contact KM1-1 of the alternating current contactor and the fuse FU, and the other end of the coil KM1 of the alternating current contactor is connected between the anode of a diode VD1 and the cathode of the diode VD4 of the first rectifier bridge; the anode of the diode VD3 and the cathode of the diode VD2 are connected with a zero line N; the cathode of the diode VD1 and the cathode of the diode VD3 are connected with the anode of the unidirectional thyristor VT 1; the cathode of the unidirectional thyristor VT1 is connected between the anode of the diode VD6 and the anode of the diode VD8 of the second rectifier bridge; the control electrode of the unidirectional thyristor VT1 is connected between the cathode of the diode VD5 and the cathode of the diode VD7 through a resistor R1 and a resistor R2 which are connected in series; one end of the current transformer TA1 is connected between the cathode of the diode VD8 and the anode of the diode VD5, and the other end of the current transformer TA1 is connected between the cathode of the diode VD6 and the anode of the diode VD 7.
In order to prevent fluctuation, a capacitor C2 and a voltage regulator VS1 are connected in series between the anode of the diode VD6 and the anode of the diode VD8 and between the resistor R1 and the resistor R2.
And the utility model discloses electric welding protection against electric shock economizer's theory of operation as follows:
before welding operation, firstly closing a double-pole single-throw switch SA1, and connecting a primary coil of an electric welding machine T1 to a power supply bus L1 and a power supply bus L2 through a capacitor C1, a fuse FU and a double-pole single-throw switch SA 1; the capacitor C1 connected in series with the primary coil of the welding machine T1 reduces the output voltage of the secondary coil of the welding machine T1 to a safe low voltage, and the micro power consumption of the welding machine is in a state to be welded.
When welding is carried out, an operator holds a welding handle to clamp a welding rod to touch a welding piece, so that a secondary coil of an electric welding machine T1 is approximately short-circuited to generate approximate short-circuit current, the approximate short-circuit current flows through a current transformer TA1, the current transformer TA1 outputs a voltage signal, the voltage signal passes through a second rectifier bridge, direct-current voltage output by the anode of the second rectifier bridge triggers a unidirectional thyristor VT1 through a resistor R2 and a resistor R1 to conduct the unidirectional thyristor VT1, the unidirectional thyristor VT1 is conducted and communicated with a positive-negative circuit of the first rectifier bridge, a coil KM1 of an alternating-current contactor is electrified and attracted, a main contact KM1-1 of the alternating-current contactor is closed, and the electric welding machine T1 obtains normal working voltage to enter a welding state.
When a welding rod needs to be replaced or welding is suspended, as the welding rod leaves a weldment, no signal is output from a current transformer TA1, a one-way thyristor VT1 is turned off due to no trigger signal, a coil KM1 of an alternating current contactor is released due to the loss of working power, a main contact KM1-1 of the alternating current contactor is disconnected, a primary coil of an electric welding machine T1 is connected with a power supply through a capacitor C1, and only small power supply can be obtained, and the purpose of ignition and arcing of the welding rod can be maintained; the secondary voltage of the electric welding machine T1 is only several volts to ten volts, no matter the welding rod is replaced or the workpiece is arranged, or the electric welding machine T1 unintentionally contacts the electrified part on the welding handle, the personal electric shock accident cannot be caused, and the electric shock protection function of the electric welding machine is realized.
Therefore, the electric welding machine can be normally electrified to work only when welding is carried out, and once a welder stops welding, the primary side of the electric welding machine is automatically connected with the capacitor in series, so that the secondary side of the electric welding machine outputs very low voltage, the safety is realized, and the electric energy is saved.
The above embodiments are only used for describing the present invention, and are not to be construed as limiting the present invention. It will be obvious to those skilled in the art that suitable changes and modifications may be made without departing from the scope of the invention, and all equivalent technical solutions are therefore intended to fall within the scope of the invention, which is defined by the appended claims.
Claims (2)
1. The utility model provides an electric shock protection economizer of electric welding which characterized in that: the welding device comprises an electric welding machine T1, a circuit to be welded and a welding control circuit, wherein the power supply reduces the output voltage of the electric welding machine to a safe low voltage through a capacitor C1 of the circuit to be welded, the welding control circuit closes a main contact KM1-1 of an alternating current contactor of the circuit to be welded, and the electric welding machine is electrified to carry out welding;
the circuit to be welded comprises a double-pole single-throw switch SA1, a fuse FU, a main contact KM1-1 of an alternating current contactor and a capacitor C1; the moving contact of the double-pole single-throw switch SA1 is respectively connected with a power bus L1 and a power bus L2; one static contact of the double-pole single-throw switch SA1 is divided into two paths after passing through the fuse FU, and one path of the static contact is connected with one end of a primary coil of an electric welding machine T1 through a main contact KM1-1 of an alternating current contactor; the other path is connected with one end of a primary coil of the electric welding machine T1 through a capacitor C1; the other end of the primary coil of the electric welding machine T1 is connected with the other stationary contact of the double-pole single-throw switch SA1 through the fuse FU; one end of a secondary coil of the electric welding machine T1 is connected with the welding handle, and the other end of the secondary coil of the electric welding machine T1 penetrates through a current transformer TA1 of the welding control circuit and then is connected with the welding handle;
the welding control circuit comprises a coil KM1 of an alternating current contactor, a first rectifier bridge, a unidirectional thyristor VT1, a resistor R1, a resistor R2, a second rectifier bridge and a current transformer TA 1; one end of a coil KM1 of the alternating current contactor is connected between a main contact KM1-1 of the alternating current contactor and the fuse FU, and the other end of the coil KM1 of the alternating current contactor is connected between the anode of a diode VD1 and the cathode of the diode VD4 of the first rectifier bridge; the anode of the diode VD3 and the cathode of the diode VD2 are connected with a zero line N; the cathode of the diode VD1 and the cathode of the diode VD3 are connected with the anode of the unidirectional thyristor VT 1; the cathode of the unidirectional thyristor VT1 is connected between the anode of the diode VD6 and the anode of the diode VD8 of the second rectifier bridge; the control electrode of the unidirectional thyristor VT1 is connected between the cathode of the diode VD5 and the cathode of the diode VD7 through a resistor R1 and a resistor R2 which are connected in series; one end of the current transformer TA1 is connected between the cathode of the diode VD8 and the anode of the diode VD5, and the other end of the current transformer TA1 is connected between the cathode of the diode VD6 and the anode of the diode VD 7.
2. The electric shock prevention energy-saving device of the electric welding machine as claimed in claim 1, wherein: a capacitor C2 and a voltage regulator VS1 are connected in series between the anode of the diode VD6 and the anode of the diode VD8 and between the resistor R1 and the resistor R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822054960.2U CN209811423U (en) | 2018-12-08 | 2018-12-08 | Electric shock-proof energy-saving device for electric welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822054960.2U CN209811423U (en) | 2018-12-08 | 2018-12-08 | Electric shock-proof energy-saving device for electric welding machine |
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| CN209811423U true CN209811423U (en) | 2019-12-20 |
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| CN201822054960.2U Active CN209811423U (en) | 2018-12-08 | 2018-12-08 | Electric shock-proof energy-saving device for electric welding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434247A (en) * | 2018-12-08 | 2019-03-08 | 郑州工业应用技术学院 | A kind of Anti-electric shock energy-saving device for electric welding machine |
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- 2018-12-08 CN CN201822054960.2U patent/CN209811423U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434247A (en) * | 2018-12-08 | 2019-03-08 | 郑州工业应用技术学院 | A kind of Anti-electric shock energy-saving device for electric welding machine |
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