CN201776554U - Plasma arc striking device - Google Patents
Plasma arc striking device Download PDFInfo
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- CN201776554U CN201776554U CN 201020509565 CN201020509565U CN201776554U CN 201776554 U CN201776554 U CN 201776554U CN 201020509565 CN201020509565 CN 201020509565 CN 201020509565 U CN201020509565 U CN 201020509565U CN 201776554 U CN201776554 U CN 201776554U
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- circuit
- arc striking
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- striking
- resistance
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Abstract
The utility model relates to a plasma arc striking device, which comprises a main contactor, a main transformer, a chopper, a pulse arc striking circuit, a high-frequency starting circuit, an arc striking relay, an inductance proximity switch, an arc striking resistor, an inductor, a resistor and a cutting torch. Two ends of the main transformer are respectively connected with input ends of the main contactor and the chopper, two output ends of the chopper are respectively connected with the inductor and the resistor, the pulse arc striking circuit and the arc striking resistor after being connected in series are connected between the other end of the inductor and the other end of the resistor, the pulse arc striking circuit is connected in parallel with the high-frequency starting circuit, the arc striking relay is connected between the pulse arc striking circuit and the high-frequency starting circuit, two ends of the high-frequency starting circuit are respectively connected with two ends of the cutting torch, and the other end of the inductor is connected with a work piece to be processed through the inductance proximity switch. The plasma arc striking device has the advantages of small volume, simple structure, long arc striking duration, long service life, low failure rate, stability and reliability.
Description
Technical field
The utility model relates to CUT, relates in particular to be used for the arc initiation device that electric arc produces and continues in the CUT.
Background technology
Air plasma arc cutting is the plasma arc bundle that relies on high temperature and high speed, the workpiece part metals melted and evaporation, and the matrix that blows off, a kind of cutting method of formation joint-cutting along with moving of plasma arc cutting torch.Because the temperature of its arc bundle is higher than the fusing point of present most metal and oxide thereof far away, so can cut most materials.The air plasma arc cutting now has been widely used in the plate cutting in the productions such as automobile, rolling stock, chemical industry, boats and ships, machine room, ventilation, environmental protection.
The plasma arc initiation device is to be used for the device that electric arc produces and continues in the CUT.Traditional plasma arc initiation device is made up of each apportion element, these apportion element cost costlinesses, the fault rate height, as easy as rolling off a log damage in the process that produces high-frequency and high-voltage, so the fault rate of plasma arc initiation device will account for 80% of whole CUT fault rate.Device such as high frequency transformer, high frequency capacitance is in short-circuit condition in producing the process of high-frequency and high-voltage, electric current is very big, so service life is short, arcing time factor is low, and striking is no more than 5 minutes continuous time.And each apportion element is heavy, and whole arc initiation device volume is big, complex structure, causes difficulty for maintenance and user's normal use.
The utility model content
At the above-mentioned deficiency of existing plasma arc initiation device, the applicant improves through research, and another kind of striking length continuous time, long service life, fault rate is low, volume is little, simple in structure, reliable and stable plasma arc initiation device are provided.
The technical solution of the utility model is as follows:
The plasma arc initiation device is made up of main contactor, main transformer, chopper, pulse arc ignition circuit, high frequency start-up circuit, striking relay, inductance approach switch, striking resistance, inductance, resistance and cutting torch; The two ends of described main transformer connect the input of main contactor and chopper respectively, and two outputs of chopper connect inductance and resistance respectively; Be connected after the series connection of pulse arc ignition circuit and striking resistance between the other end of the other end of inductance and resistance, the pulse arc ignition circuit is in parallel with the high frequency start-up circuit, be connected with the striking relay between pulse arc ignition circuit and the high frequency start-up circuit, the two ends of high frequency start-up circuit are connected with the two ends of cutting torch respectively; The other end of inductance is connected with workpiece to be processed by inductance approach switch.
Its further technical scheme is: be connected with current divider resistance between described inductance and the striking resistance.
Useful technique effect of the present utility model is:
The utility model is made up of main contactor, main transformer, chopper, pulse arc ignition circuit, high frequency start-up circuit, striking relay, inductance approach switch, striking resistance, inductance, resistance and cutting torch, volume is little, simple in structure, reliable and stable, and striking length continuous time, long service life, fault rate are low.
Description of drawings
Fig. 1 is a structure chart of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is specifically described by embodiment.
As shown in Figure 1, the utility model is made up of main contactor 1, main transformer 2, chopper 3, pulse arc ignition circuit 4, high frequency start-up circuit 5, striking relay 6, inductance approach switch 7, striking resistance 8, inductance 9, resistance 10 and cutting torch 11.The two ends of main transformer 2 connect the input of main contactor 1 and chopper 3 respectively, and two outputs of chopper 3 connect inductance 9 and resistance 10 respectively, and chopper 3 is used for producing the direct current that cutting is used.Be connected after 8 series connection of pulse arc ignition circuit 4 and striking resistance between the other end of the other end of inductance 9 and resistance 10, pulse arc ignition circuit 4 is used for the output current maintenance when high frequency produces.Be connected with current divider resistance 13 between inductance 9 and the striking resistance 8, be used to measure electric current.Pulse arc ignition circuit 4 is in parallel with high frequency start-up circuit 5, be connected with striking relay 6 between pulse arc ignition circuit 4 and the high frequency start-up circuit 5, high frequency start-up circuit 5 is used to produce the high-frequency and high-voltage alternating current, and (present embodiment is 10～15KV/AC, thereby 2MHz) begins to produce plasma arc.The two ends of high frequency start-up circuit 5 are connected with the two ends of cutting torch 11 respectively.The other end of inductance 9 is connected with workpiece 12 to be processed by inductance approach switch 7.
The utility model course of work is as follows:
(1) pre-stream
A. when receiving enabling signal, main contactor 1 adhesive, three phase mains gives main transformer 2 power supplies by main contactor 1, and main transformer 2 secondary through behind the chopper 3 forms the dc source that is suitable for plasma arc cutting at the output of chopper 3.
B. the pre-gas body of plasma at first flows out from the nozzle of cutting torch 11, has just set up the dc source that is suitable for plasma arc cutting between electrode of cutting torch 11 (negative pole) and the workpiece (positive pole).
C. pulse arc ignition circuit 4 chargings.
(2) striking
A. striking relay 6 closures, high frequency start-up circuit 5 is started working, and produces the required high-frequency and high-voltage of striking, about about 1～3S of striking time.
B. when high frequency produced, the plasma arc striking was successful, and 4 discharges of pulse arc ignition circuit come stabilizing circuit voltage, and voltage reduces extinguish arcs automatically on the high frequency start-up circuit 5.
(3) cut mode
A. the electric arc contact workpiece 12, and inductance approach switch 7 produces low level, an arc transfer then after detecting electric current.
B. high frequency start-up circuit 5 quits work, and striking relay 6 disconnects.
C. air-flow slowly increases up to the pressure that reaches setting.The plasma arc bundle of ejection high temperature and high speed in cutting torch 11 nozzles with the local fusing rapidly of workpiece, and blows away molten metal with high velocity air simultaneously, and forms narrow otch, finishes cutting process.Cutting finishes, and plasma arc extinguishes.
Each components and parts described in the present embodiment are prior art, can adopt the commercial goods.
Above-described only is preferred implementation of the present utility model, and the utility model is not limited to above embodiment.Be appreciated that those skilled in the art under the prerequisite that does not break away from spirit of the present utility model and design, can make other improvement and variation.
Claims (2)
1. a plasma arc initiation device is characterized in that being made up of main contactor (1), main transformer (2), chopper (3), pulse arc ignition circuit (4), high frequency start-up circuit (5), striking relay (6), inductance approach switch (7), striking resistance (8), inductance (9), resistance (10) and cutting torch (11); The two ends of described main transformer (2) connect the input of main contactor (1) and chopper (3) respectively, and two outputs of chopper (3) connect inductance (9) and resistance (10) respectively; Be connected after the series connection of pulse arc ignition circuit (4) and striking resistance (8) between the other end of the other end of inductance (9) and resistance (10), pulse arc ignition circuit (4) is in parallel with high frequency start-up circuit (5), be connected with striking relay (6) between pulse arc ignition circuit (4) and the high frequency start-up circuit (5), the two ends of high frequency start-up circuit (5) are connected with the two ends of cutting torch (11) respectively; The other end of inductance (9) is connected with workpiece (12) to be processed by inductance approach switch (7).
2. according to the described plasma arc initiation device of claim 1, it is characterized in that, be connected with current divider resistance (13) between described inductance (9) and the striking resistance (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020509565 CN201776554U (en) | 2010-08-27 | 2010-08-27 | Plasma arc striking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020509565 CN201776554U (en) | 2010-08-27 | 2010-08-27 | Plasma arc striking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201776554U true CN201776554U (en) | 2011-03-30 |
Family
ID=43789786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020509565 Expired - Lifetime CN201776554U (en) | 2010-08-27 | 2010-08-27 | Plasma arc striking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201776554U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941114A (en) * | 2010-08-27 | 2011-01-12 | 无锡华联科技集团有限公司 | Plasma arc initiating device |
| CN102625560A (en) * | 2012-03-10 | 2012-08-01 | 新疆天业（集团）有限公司 | Arc-striking method for plasma torches |
| CN103401468A (en) * | 2013-07-29 | 2013-11-20 | 深圳市航天新源科技有限公司 | Plasma arc starting circuit |
-
2010
- 2010-08-27 CN CN 201020509565 patent/CN201776554U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941114A (en) * | 2010-08-27 | 2011-01-12 | 无锡华联科技集团有限公司 | Plasma arc initiating device |
| CN101941114B (en) * | 2010-08-27 | 2012-08-29 | 无锡华联科技集团有限公司 | Plasma arc initiating device |
| CN102625560A (en) * | 2012-03-10 | 2012-08-01 | 新疆天业（集团）有限公司 | Arc-striking method for plasma torches |
| CN103401468A (en) * | 2013-07-29 | 2013-11-20 | 深圳市航天新源科技有限公司 | Plasma arc starting circuit |
| CN103401468B (en) * | 2013-07-29 | 2016-02-17 | 深圳市航天新源科技有限公司 | A kind of plasma arc striking circuit |
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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: 20110330 Effective date of abandoning: 20120829 |