CN204455265U - Plasma spraying equipment high-frequency high-voltage arc striking - Google Patents
Plasma spraying equipment high-frequency high-voltage arc striking Download PDFInfo
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- CN204455265U CN204455265U CN201520122880.XU CN201520122880U CN204455265U CN 204455265 U CN204455265 U CN 204455265U CN 201520122880 U CN201520122880 U CN 201520122880U CN 204455265 U CN204455265 U CN 204455265U
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Abstract
A kind of plasma spraying equipment high-frequency high-voltage arc striking, comprises the main loop circuit of spraying source, high-frequency and high-voltage matching transformer and high-voltage arc strike plate.Negative electrode and the anode of described main loop circuit and spray gun are connected.Described high-frequency and high-voltage matching transformer comprises primary and secondary, and the elementary and described high-voltage arc strike plate of described high-frequency and high-voltage matching transformer is connected, and the secondary tandem of described high-frequency and high-voltage matching transformer is in described main loop circuit.Described arc initiation device also comprises the bypass circuit with the secondary parallel of described high-frequency and high-voltage matching transformer.Described bypass circuit optionally disconnects or closes, make in arc process, a part for the path of the secondary formation striking electric current of described high-frequency and high-voltage matching transformer, and at described main loop circuit when striking successfully provides in the process of work big current, described bypass circuit is by the secondary short circuited of described high-frequency and high-voltage matching transformer.
Description
Technical field
The utility model relates to a kind of plasma spraying equipment, particularly the high-frequency high-voltage arc striking of plasma spraying equipment.
Background technology
Plasma spraying equipment is the plasma beam producing high temperature, high speed by plasma spray gun, produce the general principles of plasma arc: the argon Ar first passing to a minimum flow between the negative electrode and anode of plasma spray gun, then the high-voltage that the high frequency in spraying equipment water power transfer box, high voltage arc generating device produce about 3000V is added between the negative electrode of spray gun and anode, argon gas is ionized, produces plasma arc.
High frequency, high-voltage are added in main power circuit by a high pressure matching transformer by high-frequency arc strike device, also on the negative electrode being namely connected to spray gun and anode, the elementary of high pressure matching transformer is received on a high frequency, high pressure generation plate, during work, high frequency oscillating current on primary winding is coupled to secondary by magnetic core, secondary coil just creates high pressure, high-frequency current, secondary coil is connected with main power circuit by series system, and high pressure, the high-frequency current of striking have just been superimposed upon in master loop.
Current equipment all adopts this series system to connect, the secondary coil of high-frequency and high-voltage matching transformer is connected in series in master loop, its secondary coiled notebook body is just as a path of main power circuit, the big current provided by spraying source for a long time is operationally provided, be 800A to the maximum, like this, just require that secondary coil will ensure certain copper cross section, at present, similar spraying equipment, the coil being manufactured with employing cast aluminium or copper pipe coiling of this coil, coil operationally adopts Forced water cooling or air blast cooling, the making difficulty of coil, volume is not little yet.
Utility model content
The utility model manufactures difficulty, high in cost of production factor for the striking coil of existing arc initiation device, provide the spraying source master loop big current bypass circuit of a kind of practicality, concrete high-frequency and high-voltage striking coil, the application of this circuit can make the arc initiation device manufacture of plasma spraying equipment simple, versatility is good, dependable performance, the advantage that cost is low.
A kind of plasma spraying equipment high-frequency high-voltage arc striking that the utility model provides, comprise the main loop circuit of spraying source, high-frequency and high-voltage matching transformer and high-voltage arc strike plate, negative electrode and the anode of described main loop circuit and spray gun are connected, described high-frequency and high-voltage matching transformer comprises primary and secondary, elementary and the described high-voltage arc strike plate of described high-frequency and high-voltage matching transformer is connected, the secondary tandem of described high-frequency and high-voltage matching transformer is in described main loop circuit, described arc initiation device also comprises the bypass circuit with the secondary parallel of described high-frequency and high-voltage matching transformer, described bypass circuit optionally disconnects or closes, make in arc process, a part for the path of the secondary formation striking electric current of described high-frequency and high-voltage matching transformer, and provide in the process of work big current after described main loop circuit striking success, described bypass circuit is by the secondary short circuited of described high-frequency and high-voltage matching transformer.
In one embodiment, described bypass circuit comprises bypass contactor, the main contact of described bypass contactor is connected in parallel on the secondary two ends of described high-frequency and high-voltage matching transformer, when providing in the process of work big current after described main loop circuit striking success, the main contact of described bypass contactor is in attracting state with the secondary short circuited by described high-frequency and high-voltage matching transformer.
In one embodiment, described bypass contactor is connected with rly., described rly. starts action when forming small area analysis plasma arc between the negative electrode, anode of described spray gun, makes described contactor energized action to make the main contact adhesive of described bypass contactor.
In one embodiment, described high-voltage arc strike plate is connected with rly., described rly. starts action when being applied in an open circuit voltage on described main loop circuit, make described high-voltage arc strike plate switch on power to export high frequency, high pressure to described high-frequency and high-voltage matching transformer elementary on.
In one embodiment, electrical condenser is connected in parallel in described main loop circuit, the path of the described striking electric current of secondary formation of the negative electrode of described electrical condenser, described spray gun, anode and described high-frequency and high-voltage matching transformer.
In one embodiment, described high-frequency high-voltage arc striking comprises the first rly. and the second rly., described first rly. is connected with described high-voltage arc strike plate, described second rly. is connected with described contactor, the action of described first rly. and the second rly. controls by spraying master control cabinet, make: when described main loop circuit is applied in an open circuit voltage, described first rly. starts action, described high-voltage arc strike plate is made to switch on power to export high frequency, high pressure to described high-frequency and high-voltage matching transformer elementary on, thus at the secondary generation high pressure of described high-frequency and high-voltage matching transformer, described high pressure passes through described main loop circuit by the negative electrode of described spray gun, main process gas between anode punctures to form plasma arc, when forming small area analysis plasma arc between the negative electrode, anode of described spray gun, described second rly. starts action, makes described contactor energized action to make the main contact adhesive of described bypass contactor.
In one embodiment, described open circuit voltage is 120V.
In one embodiment, safeguard that the back ground current of described small area analysis plasma arc is within 100A.
In certain embodiments, described work big current is 800A.
Current plasma spraying equipment high frequency used, high voltage arc generating device elementaryly connect high frequency thereon by a high-voltage arc strike plate and one, high pressure matching transformer forms, and the secondary tandem of high pressure matching transformer is in the master loop of spraying source; Although the high-voltage of about 3000V needed for striking can be added on the electrode of the plasma spray gun be connected in master loop by this device, but high pressure matching transformer is secondary again as the circuit path of master loop, master loop must be born and be supplied to the working current that spray gun is 800A to the maximum, so the heat radiation of the secondary conductor cross-section of coiling and transformer must be considered.But the utility model provides a kind of novel plasma spraying equipment high-frequency high-voltage arc striking.In arc process, a part for the secondary formation striking current path of high-frequency and high-voltage matching transformer, be provided in the process of work big current at main loop circuit, arc initiation device utilizes the main contact of the secondary parallel bypass contactor of high-frequency and high-voltage matching transformer, by controlling the work schedule of high-frequency high-voltage arc striking and bypass contactor, make bypass circuit by the secondary short circuited of high-frequency and high-voltage matching transformer, like this, normally striking can either be realized, effectively can be decreased through the secondary working current of high-frequency and high-voltage matching transformer again, can consider that matching transformer secondary coil bears the problem of big current, as used in the argon welder less high-frequency and high-voltage matching transformer be in daily use with one.
Accompanying drawing explanation
Fig. 1 is plasma spraying equipment high-frequency high-voltage arc striking and main circuit current bypass circuit schematic diagram.
Embodiment
Before describing the embodiments in more detail, it should be understood that the utility model is not limited to detailed construction in the application hereafter or described in accompanying drawing or arrangement of elements.The utility model can be the embodiment that alternate manner realizes.And, should be appreciated that wording used herein and term are only used as to describe purposes, should being construed as limiting property not explain.Similar wording meant and comprised item listed thereafter, its equivalent and other additional things " comprising " used herein, " comprising ", " having " etc.Particularly, when describing " certain element ", the quantity that the utility model does not limit this element is one, also can comprise multiple.
As shown in Figure 1, Fig. 1 is plasma spraying equipment high-frequency high-voltage arc striking and main circuit current bypass circuit schematic diagram.Plasma spraying equipment high-frequency high-voltage arc striking comprises the main loop circuit of spraying source, high-frequency and high-voltage matching transformer 5 and high-voltage arc strike plate 6.
Anode 2 and the negative electrode 3 of main loop circuit and spray gun are connected, and are parallel with electrical condenser 1 in main loop circuit.High-frequency and high-voltage matching transformer 5 comprises elementary 5a and secondary 5b, and wherein, the elementary 5a of high-frequency and high-voltage matching transformer 5 is connected with high-voltage arc strike plate 6, and the secondary 5b of high-frequency and high-voltage matching transformer 5 is connected in main loop circuit.The secondary 5b of the anode 2 of electrical condenser 1, spray gun, negative electrode 3 and high-frequency and high-voltage matching transformer 5 forms the path of striking electric current.
Described high-frequency high-voltage arc striking also comprises the bypass circuit in parallel with the secondary 5b of high-frequency and high-voltage matching transformer 5.This bypass circuit optionally disconnects or closes, make in arc process, the secondary 5b of high-frequency and high-voltage matching transformer 5 forms a part for the path of striking electric current, and providing in the process of work big current after main loop circuit striking success, described bypass circuit is by the secondary 5b short circuit of high-frequency and high-voltage matching transformer 5.
In an illustrated embodiment, bypass circuit comprises bypass contactor 9, the main contact 7 of bypass contactor 9 is connected in parallel on the secondary 5b two ends of high-frequency and high-voltage matching transformer 5, when providing in the process of work big current after main loop circuit striking success, the main contact 7 of bypass contactor 9 is in attracting state with the secondary 5b short circuit by high-frequency and high-voltage matching transformer 5.
High-frequency high-voltage arc striking also comprises the first rly. 4 and the second rly. 8, and wherein, the first rly. 4 is connected with high-voltage arc strike plate 6, and the second rly. 8 is connected with bypass contactor 9.
First rly. 4 starts action when being applied in an open circuit voltage on main loop circuit, makes high-voltage arc strike plate 6 switch on power to export on the elementary 5a of high-frequency and high-voltage tremendously high frequency high pressure matching transformer 5.Wherein, this open circuit voltage is such as 120V.
Second rly. 8 starts action when forming small area analysis plasma arc between the anode 2 and negative electrode 3 of spray gun, makes contactor 9 energized action to make main contact 7 adhesive of bypass contactor 9.Wherein, the back ground current of this small area analysis plasma arc is maintained such as within 100A.
The above-mentioned action of the first rly. 4 and the second rly. 8 controls by spraying master control cabinet, specific as follows: when starting to carry out spray coating operations, pilot source in plasma spraying power source first exports a higher open circuit voltage (such as 120V) and adds on main loop circuit, first rly. 4 starts action, high-voltage arc strike plate 6 is made to switch on power to export on the elementary 5a of high-frequency and high-voltage tremendously high frequency high pressure matching transformer 5, thus produce high pressure at the secondary 5b of high-frequency and high-voltage matching transformer 5, main process gas between the anode 2 of spray gun and negative electrode 3 punctures to form plasma arc by main loop circuit by the high pressure produced, now pilot source adds that while setting up electric arc keep-alive voltage is stablized to keep one, the small area analysis plasma arc continued, maintain the back ground current of this small area analysis plasma arc such as within 100A, this electric current is by the secondary coil of transformer 5, first rly. 4 disconnects, high-voltage arc strike plate stops striking, second rly. 8 starts action, make bypass contactor 9 energized action to make main contact 7 adhesive of bypass contactor 9, thus by the secondary coil 5b short circuit of high-frequency and high-voltage matching transformer 5, the now overwhelming majority shunting of working current is flow through from bypass circuit, then main power power-supply startup starts as plasma arc load provides constant work big current, now, work big current is mainly through the main contact 7 of bypass contactor 9, the working current that the secondary coil 5b of high-frequency and high-voltage matching transformer 5 flows through is very little.
In an illustrated embodiment, described open circuit voltage is 120V, and safeguard that the back ground current of described small area analysis plasma arc is within 100A, work big current when plasma spraying equipment normally works is 800A.Should be understood that, above-mentioned voltage and current is exemplary, it is 120V that the utility model does not limit open circuit voltage, back ground current is within 100A, work big current is 800A, in other examples, open circuit voltage, back ground current and work big current also can be got other values or be limited within the scope of certain.
In sum, the utility model provides a kind of plasma spraying equipment high-frequency high-voltage arc striking.In arc process, a part for the secondary formation striking current path of high-frequency and high-voltage matching transformer, there is provided in the process of work big current after main loop circuit striking success, arc initiation device utilizes the main contact of the secondary parallel bypass contactor of high-frequency and high-voltage matching transformer, by controlling the work schedule of high-frequency high-voltage arc striking and bypass contactor, make bypass circuit by the secondary short circuited of high-frequency and high-voltage matching transformer.Like this, normally striking can either be realized, effectively can be decreased through the secondary working current of high-frequency and high-voltage matching transformer again, can consider that matching transformer secondary coil bears the problem of big current, as used in the argon welder less high-frequency and high-voltage matching transformer be in daily use with.
Concept described by the utility model may be embodied to other form when not departing from its spirit and characteristic.Disclosed specific embodiment should be regarded as exemplary instead of restrictive.Therefore, scope of the present utility model is by appended claim, instead of determines according to these descriptions before.Any change in the letter and equivalency range of claim all should belong to the scope of these claims.
Claims (4)
1. a plasma spraying equipment high-frequency high-voltage arc striking, comprise the main loop circuit of spraying source, high-frequency and high-voltage matching transformer and high-voltage arc strike plate, negative electrode and the anode of described main loop circuit and spray gun are connected, described high-frequency and high-voltage matching transformer comprises primary and secondary, elementary and the described high-voltage arc strike plate of described high-frequency and high-voltage matching transformer is connected, the secondary tandem of described high-frequency and high-voltage matching transformer is in described main loop circuit, it is characterized in that, described arc initiation device also comprises the bypass circuit with the secondary parallel of described high-frequency and high-voltage matching transformer, described bypass circuit optionally disconnects or closes, make in arc process, a part for the path of the secondary formation striking electric current of described high-frequency and high-voltage matching transformer, and provide in the process of work big current after described main loop circuit striking success, described bypass circuit is by the secondary short circuited of described high-frequency and high-voltage matching transformer.
2. plasma spraying equipment high-frequency high-voltage arc striking as claimed in claim 1, it is characterized in that, described bypass circuit comprises bypass contactor, the main contact of described bypass contactor is connected in parallel on the secondary two ends of described high-frequency and high-voltage matching transformer, when providing in the process of work big current after described main loop circuit striking success, the main contact of described bypass contactor is in attracting state with the secondary short circuited by described high-frequency and high-voltage matching transformer.
3. plasma spraying equipment high-frequency high-voltage arc striking as claimed in claim 2, it is characterized in that, described bypass contactor is connected with rly., described rly. starts action when forming small area analysis plasma arc between the negative electrode, anode of described spray gun, makes described contactor energized action to make the main contact adhesive of described bypass contactor.
4. plasma spraying equipment high-frequency high-voltage arc striking as claimed in claim 2, it is characterized in that, described high-frequency high-voltage arc striking comprises the first rly. and the second rly., described first rly. is connected with described high-voltage arc strike plate, described second rly. is connected with described contactor, the action of described first rly. and the second rly. controls by spraying master control cabinet, make: when described main loop circuit is applied in an open circuit voltage, described first rly. starts action, described high-voltage arc strike plate is made to switch on power to export high frequency, high pressure to described high-frequency and high-voltage matching transformer elementary on, thus at the secondary generation high pressure of described high-frequency and high-voltage matching transformer, described high pressure passes through described main loop circuit by the negative electrode of described spray gun, main process gas between anode punctures to form plasma arc, when forming small area analysis plasma arc between the negative electrode, anode of described spray gun, described second rly. starts action, makes described contactor energized action to make the main contact adhesive of described bypass contactor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520122880.XU CN204455265U (en) | 2015-03-03 | 2015-03-03 | Plasma spraying equipment high-frequency high-voltage arc striking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520122880.XU CN204455265U (en) | 2015-03-03 | 2015-03-03 | Plasma spraying equipment high-frequency high-voltage arc striking |
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| CN204455265U true CN204455265U (en) | 2015-07-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115637401A (en) * | 2022-09-26 | 2023-01-24 | 北京金轮坤天特种机械有限公司 | Water-electricity switching device for plasma spraying and monitoring method thereof |
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2015
- 2015-03-03 CN CN201520122880.XU patent/CN204455265U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115637401A (en) * | 2022-09-26 | 2023-01-24 | 北京金轮坤天特种机械有限公司 | Water-electricity switching device for plasma spraying and monitoring method thereof |
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