CN209462689U - A kind of twin cathode axial direction feeding plasma gun - Google Patents
A kind of twin cathode axial direction feeding plasma gun Download PDFInfo
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- CN209462689U CN209462689U CN201821778437.8U CN201821778437U CN209462689U CN 209462689 U CN209462689 U CN 209462689U CN 201821778437 U CN201821778437 U CN 201821778437U CN 209462689 U CN209462689 U CN 209462689U
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Abstract
The utility model discloses a kind of twin cathode axial direction feeding plasma gunes, are related to plasma gun construction applications.The spray gun includes with symmetrically arranged first gun body of axial feed pipe, the second gun body, and the axial feed pipe for inputting sprayed on material, and axial feed pipe has the feed end and discharge end being oppositely arranged；On the direction of feed end to discharge end, the first gun body and the second gun body include the rear lance set gradually, cathode, insulator, middle gun body, anode, front gun body；Wherein, rear lance, insulator, middle gun body and front gun body are wrapped in the outside of cathode jointly, and insulator one end is connect with rear lance, and the other end is connect with middle gun body, and middle gun body one end is connect with insulator, and the other end is connect with front gun body and anode.Powder, suspension or solution presoma can be injected plasma jet center while improving plasma spraying power by the spray gun, realize that high-power spraying prepares quality coating under normal pressure, low pressure or ultralow pressure environment.
Description
Technical field
The utility model relates to plasma gun construction applications, in particular to a kind of twin cathode axial direction feeding etc. from
Sub- spray gun.
Background technique
Prior art plasma spraying uses non-diverting type plasma-arc as heat source, can be by metal, alloy, ceramic material
Material is heated to melting or semi-molten state, and the coating of adhesion-tight is formed with high-speed impact to workpiece surface.The technology can be real
Existing workpiece surface is strengthened and surface is modified, improve workpiece resist Service Environment ability it is (such as wear-resisting, anti-corrosion, endurance, resistant to high temperatures
Oxidation etc.), assign workpiece surface it is new or higher physical function, chemical functional and specific function (including sound, electricity, light, magnetic,
The performances such as heat and its conversion), the good composite material of comprehensive performance is become, to meet the application need of various bad working environments
It asks.
Currently, spray gun used in plasma spraying mostly uses single cathode construction and radial feeding style both at home and abroad.On the one hand, single
The usual power of cathode construction spray gun is lower (< 50kW), it is difficult to the coating deposition for realizing very high quality, especially in sprayed suspension
When it is even more so.On the other hand, radial feeding style easily makes dusty spray or liquid material move rail after entering plasma jet
Mark diverging, can not fully enter plasma jet center, cause plasma jet to accelerate the heating of sprayed on material uneven, will
It reduces spray efficiency and influences the structure and performance of coating, especially when painting environments are low pressure or ultralow pressure, plasma is penetrated
Stream will obviously expand, and become increasingly difficult this radial feeding.In order to be further improved spraying process, coating quality is promoted,
Occur more cathode plasma spray guns in succession both at home and abroad, wherein most representative is three cathode plasma spray guns.The spray gun energy
Large power shaft is enough realized to dusty spray and suspension, but lance driving device is at high cost, when spraying easily stifled rifle, and be not implemented low
High-power spraying is carried out under pressure or ultralow pressure environment.
Utility model content
The purpose of this utility model is to provide a kind of twin cathode axial direction feeding plasma gun, by using twin cathode and
Axial feeding design realizes that high-power spraying prepares quality coating under normal pressure, low pressure or ultralow pressure environment.
The embodiments of the present invention are achieved in that
A kind of twin cathode axial direction feeding plasma gun, comprising:
First gun body, the second gun body and axial feed pipe, the first gun body and the second gun body are symmetrical arranged with axial feed pipe,
Axial feed pipe is for inputting sprayed on material, and axial feed pipe has the feed end and discharge end being oppositely arranged；
Wherein, on the direction of feed end to discharge end, the first gun body and the second gun body include the rear rifle set gradually
Body, cathode, insulator, middle gun body, anode, front gun body, rear lance, insulator, middle gun body and front gun body are wrapped in yin jointly
The outside of pole, and insulator one end is connect with rear lance, the other end is connect with middle gun body, and middle gun body one end is connect with insulator,
The other end is connect with front gun body and anode.
Further, in the preferred embodiment of the utility model, front gun body includes upper end gun body and lower end gun body, lower end
Gun body one end is connect with middle gun body, and the other end is connect with upper end gun body, and anode one end is connect with middle gun body, and the other end is to discharge end
Extend, so that an end face of anode is connect with lower end gun body, other end is connect with upper end gun body.
Further, in the preferred embodiment of the utility model, between rear lance and cathode, rear lance and insulator it
Between, between insulator and middle gun body, between middle gun body and front gun body, between anode and lower end gun body and upper end gun body, upper end rifle
The connection that is screwed is all made of between body and lower end gun body.
Further, in the preferred embodiment of the utility model, the central axis of the first gun body and the second gun body and double
The spindle centerline of cathode axial direction feeding plasma gun is in 15~20 ° of angles.
Further, in the preferred embodiment of the utility model, the central axis of the first gun body and the second gun body and double
The spindle centerline of cathode axial direction feeding plasma gun is in 17 ° of angles.
Further, in the preferred embodiment of the utility model, the first gun body is separately connect with the second gun body
Be provided with a DC power supply and a control cabinet, and the anode and cathode of DC power supply respectively with the first gun body and the second gun body
Anode be connected with cathode.
Further, in the preferred embodiment of the utility model, the feed end of axial feed pipe is connected with turntable
Formula powder feeder or liquid material pump conveyer, and rotating disc type powder feeder conveys powder for feed pipe in the axial direction, and liquid material pump conveyer is used for
Feed pipe conveying suspension or solution presoma in the axial direction.
Further, in the preferred embodiment of the utility model, middle gun body, lower end gun body, the material of upper end gun body are equal
For brass material.
Further, in the preferred embodiment of the utility model, the material of cathode is tungsten alloy material, the material of anode
For red copper material.
Further, in the preferred embodiment of the utility model, anode further includes liner layer, and the material of liner layer is difficult
Molten tungsten alloy material, tungsten alloy material are selected from any one of cerium tungsten alloy or thorium tungsten alloy.
The embodiments of the present invention at least have following advantages or the utility model has the advantages that
1) by using two cathodes and two DC power supplies, increase the power of plasma gun, maximum power is reachable
80kW is conducive to spray refractory material and suspension.
It 2) can will be in powder, suspension or solution presoma axial injection plasma jet using axial feed pipe
The heart enhances plasma jet to the heating acceleration effect of sprayed on material, and can improve the deposition efficiency of sprayed on material, is suitable for fast
The fast uniform quality coating of deposition fabric.
3) equipment cost is low, and when spraying is not easy stifled rifle, and the big function under normal pressure, low pressure or ultralow pressure environment may be implemented
Rate spraying.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram for the twin cathode axial direction feeding plasma gun that the embodiments of the present invention provide；
Fig. 2 is the twin cathode axial direction feeding plasma gun low pressure spray zirconia powder that the embodiments of the present invention provide
The coating cross sections microstructure picture at end；
Fig. 3 is traditional single cathode radial direction powder feeding plasma gun low pressure spray Zirconium oxide powder that the prior art provides
Coating cross sections microstructure picture；
Fig. 4 is that the twin cathode axial direction feeding plasma gun low pressure spray zirconium oxide that the embodiments of the present invention provide is outstanding
The coating cross sections microstructure picture of supernatant liquid；
Fig. 5 is the painting of three cathode axial powder feed plasma gun low pressure spray zirconia nanosuspensions of low-power in the prior art
Layer cross section microstructure picture.
Icon: 100- twin cathode axial direction feeding plasma gun；101- rear lance；103- cathode；105- insulator；107-
Middle gun body；109- anode；111- front gun body；The lower end 113- gun body；The upper end 115- gun body；117- axial direction feed pipe.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.Therefore, below to attached
The detailed description of the embodiments of the present invention provided in figure is not intended to limit the range of claimed invention,
But it is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, belongs to the model of the utility model protection
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the utility model embodiment, it should be noted that term " center ", "upper", "lower", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "inner", "outside" is orientation based on the figure or position
Relationship or the utility model product using when the orientation or positional relationship usually put, be merely for convenience of describing this reality
It is described with novel with simplified, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third "
It is described etc. being only used for distinguishing, is not understood to indicate or imply relative importance.
In the description of the utility model embodiment, it is also necessary to which explanation is unless specifically defined or limited otherwise, art
Language " setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachable
Connection, or be integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, centre can also be passed through
Medium is indirectly connected, and can be the connection inside two elements.It for the ordinary skill in the art, can specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature is on or below second feature
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature the
Right above two features and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature is in the second spy
Under sign, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of fisrt feature level
Height is less than second feature.
Fig. 1 is the structural schematic diagram of twin cathode axial direction feeding plasma gun 100 provided in this embodiment.Referring to Fig. 1,
Present embodiments provide a kind of twin cathode axial direction feeding plasma gun 100, comprising: the first gun body, the second gun body and axial direction are sent
Expects pipe 117.
In detail, in the present embodiment, the first gun body and the second gun body are symmetrical arranged with axial feed pipe 117, are axially sent
Expects pipe 117 is for inputting sprayed on material, and axial feed pipe 117 has the feed end and discharge end being oppositely arranged.Also, into
Expect on end to the direction of discharge end, the first gun body and the second gun body include the rear lance 101 set gradually, cathode 103, insulation
Body 105, middle gun body 107, anode 109, front gun body 111, rear lance 101, insulator 105, middle gun body 107 and front gun body 111
It being wrapped in the outside of cathode 103 jointly, and 105 one end of insulator is connect with rear lance 101, the other end is connect with middle gun body 107,
Middle 107 one end of gun body is connect with insulator 105, and the other end is connect with front gun body 111 and anode 109.The equipment cost of the spray gun
Low, when spraying, is not easy stifled rifle, and the high-power spraying under normal pressure, low pressure or ultralow pressure environment may be implemented.Also, use axis
Can powder, suspension or solution presoma axial injection plasma jet center be enhanced plasma to feed pipe 117 and penetrated
The heating acceleration effect to sprayed on material is flowed, and the deposition efficiency of sprayed on material can be improved, is suitable for fast deposition even tissue
Quality coating.
Referring to Fig. 1, in the present embodiment, front gun body 111 includes upper end gun body 115 and lower end gun body 113, lower end
113 one end of gun body is connect with middle gun body 107, and the other end is connect with upper end gun body 115, and 109 one end of anode and middle gun body 107 connect
It connecing, the other end extends to discharge end, so that an end face of anode 109 is connect with lower end gun body 113, other end and upper end gun body
115 connections.By the setting of upper end gun body 115 and lower end gun body 113 so that anode 109 can be effectively fixed, Jin Erneng
Effectively guarantee being normally carried out for spraying operation.
As a preferred option, in the present embodiment, between rear lance 101 and cathode 103, rear lance 101 and insulator
Between 105, between insulator 105 and middle gun body 107, between middle gun body 107 and front gun body 111, anode 109 and lower end gun body
Between 113 and upper end gun body 115, the connection that is screwed is all made of between upper end gun body 115 and lower end gun body 113.Using screw thread
Connection type can facilitate the installation and removal between each component, improve operating efficiency, while when any component is damaged
When, the component of the replaceable damage, without all replacements, can effectively save the cost expense, reduce maintenance cost.
Referring to Fig. 1, in the present embodiment, the central axis of the first gun body and the second gun body is axially sent with twin cathode
The spindle centerline for expecting plasma gun 100 is in 15~20 ° of angles.The first gun body and the second gun body of the angle are easily worked,
Processing cost is low.Meanwhile effect and matter by the setting of the angle so that feeding operation is easier to carry out, after also spraying feeding
Amount is more preferable.
As a preferred option, in the present embodiment, the central axis of the first gun body and the second gun body and twin cathode are axial
The spindle centerline of feeding plasma gun 100 is in 17 ° of angles.Certainly, in the other embodiments of the utility model, the first rifle
The angle of the spindle centerline of body and the central axis of the second gun body and twin cathode axial direction feeding plasma gun 100 can be with root
It is adjusted according to demand, the embodiments of the present invention are without limitation.
It is further preferred that in the present embodiment, the first gun body and the second gun body are separately connected with one
DC power supply and a control cabinet, and the anode and the cathode anode 109 with the first gun body and the second gun body respectively of DC power supply
It is connected with cathode.By using two cathodes 103 and two DC power supplies, increase the power of plasma gun, maximum power
Up to 80kW, be conducive to spray refractory material and suspension.
Also, in the present embodiment, the feed end of axial feed pipe 117 is connected with rotating disc type powder feeder or liquid material pump
Conveyer, rotating disc type powder feeder convey powder for feed pipe 117 in the axial direction, and liquid material pumps conveyer for feed pipe in the axial direction
117 conveying suspension or solution presoma.It can be by powder, suspension or solution presoma axis using axial feed pipe 117
To injection plasma jet center, enhance plasma jet to the heating acceleration effect of sprayed on material, and sprayed on material can be improved
Deposition efficiency, the quality coating suitable for fast deposition even tissue.
As a preferred option, in the present embodiment, middle gun body 107, lower end gun body 113, the material of upper end gun body 115 are equal
For brass material.The material of cathode 103 is tungsten alloy material, and the material of anode 109 is red copper material.The thermal conductivity of brass material
It preferably, can effectively conduction heat transfer.Red copper material is also thermally conductive and material with good conductivity.The electron emissivity of tungsten alloy
Strong and fusing point is high.The setting of these materials can effectively guarantee spraying effect and quality.
It is further preferred that in the present embodiment, anode 109 further includes liner layer, the material of liner layer is the conjunction of infusibility tungsten
Golden material, tungsten alloy material are selected from any one of cerium tungsten alloy or thorium tungsten alloy.The use of infusibility tungsten alloy can effectively prolong
Its long service life, saves the cost of maintenance with replacement.
Fig. 2 is 100 low pressure spray of the twin cathode axial direction feeding plasma gun oxidation that the embodiments of the present invention provide
The coating cross sections microstructure picture of zirconium powder, as a comparison, Fig. 3 are that traditional single cathode 103 that the prior art provides is radial
The coating cross sections microstructure picture of powder feeding plasma gun low pressure spray Zirconium oxide powder.From two width figures it can be found that with
Conventional lance is compared using radial powder feeding, since the utility model is using axial powder feed mode, therefore the Zirconium oxide powder quilt sprayed
Plasma jet heat more sufficiently with it is consistent, coating structure obtained is finer and close and uniform, the quality of coating
Also higher.
Fig. 4 is 100 low pressure spray of the twin cathode axial direction feeding plasma gun oxidation that the embodiments of the present invention provide
The coating cross sections microstructure picture of zirconium suspension, as a comparison, Fig. 5, which is that three cathode of low-power 103 is axial in the prior art, to be sent
The coating cross sections microstructure picture of powder plasma gun low pressure spray zirconia nanosuspensions.From two width figures as can be seen that with
Three cathode of low-power, 103 axial powder feed spray gun is compared, since the utility model spray gun has higher power, therefore can preferably more
Because of the heat that liquid evaporation is taken away when mending sprayed suspension, more energy is allowed to can be used in heated oxide zirconium, makes the painting of preparation
Layer melts more abundant, and the porosity and defect of institutional framework are less.
To sum up, in the specific use process, each component is sequentially connected after being completed, in the first gun body and the second gun body
On be separately connected two independent DC power supplies and control cabinet, the positive electrode and negative electrode of DC power supply be connected to anode 109 with
On cathode 103, its maximum power is made to reach 80kW.After plasma jet is stablized, using axial feed pipe 117 by powder or
Suspension or solution presoma are sent into plasma jet center, and final sprayed on material is melted rear high-speed impact matrix and forms painting
Layer.The spray gun that the embodiments of the present invention provide can be sprayed under normal pressure, low pressure or ultralow pressure, and sprayed on material can
To be metal, alloy and high-melting-point ceramic material.
In conclusion compared with prior art, the utility model has the advantage, that
1) by using two cathodes 103 and two DC power supplies, increase the power of plasma gun, maximum power can
Up to 80kW, be conducive to spray refractory material and suspension.
It 2) can be by powder, suspension or solution presoma axial injection plasma jet using axial feed pipe 117
Center enhances plasma jet to the heating acceleration effect of sprayed on material, and can improve the deposition efficiency of sprayed on material, is suitable for
The quality coating of fast deposition even tissue.
3) equipment cost is low, and when spraying is not easy stifled rifle, and the big function under normal pressure, low pressure or ultralow pressure environment may be implemented
Rate spraying.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of twin cathode axial direction feeding plasma gun characterized by comprising
First gun body, the second gun body and axial feed pipe, first gun body and second gun body are with the axial feed pipe
It is symmetrical arranged, the axial direction feed pipe is for inputting sprayed on material, and the axial feed pipe has the feed end being oppositely arranged
And discharge end；
Wherein, on the feed end to the direction of the discharge end, first gun body and second gun body include according to
Rear lance, cathode, insulator, middle gun body, the anode, front gun body of secondary setting, the rear lance, the insulator, the middle rifle
Body and the front gun body are wrapped in the outside of the cathode jointly, and described insulator one end is connect with the rear lance, separately
One end is connect with the middle gun body, and described middle gun body one end is connect with the insulator, the other end and the front gun body and described
Anode connection.
2. twin cathode axial direction feeding plasma gun according to claim 1, it is characterised in that:
The front gun body includes upper end gun body and lower end gun body, and lower end gun body one end is connect with the middle gun body, the other end
It is connect with the upper end gun body, described anode one end is connect with the middle gun body, and the other end extends to the discharge end, so that institute
The end face for stating anode is connect with the lower end gun body, and other end is connect with the upper end gun body.
3. twin cathode axial direction feeding plasma gun according to claim 2, it is characterised in that:
Between the rear lance and the cathode, between the rear lance and the insulator, the insulator and the middle rifle
Between body, between the middle gun body and the front gun body, between the anode and the lower end gun body and the upper end gun body, institute
It states and is all made of the connection that is screwed between upper end gun body and the lower end gun body.
4. twin cathode axial direction feeding plasma gun according to claim 1, it is characterised in that:
The main shaft of the central axis of first gun body and second gun body and the twin cathode axial direction feeding plasma gun
Center line is in 15~20 ° of angles.
5. twin cathode axial direction feeding plasma gun according to claim 4, it is characterised in that:
The main shaft of the central axis of first gun body and second gun body and the twin cathode axial direction feeding plasma gun
Center line is in 17 ° of angles.
6. twin cathode axial direction feeding plasma gun according to any one of claim 1 to 5, it is characterised in that:
First gun body and second gun body are separately connected with a DC power supply and a control cabinet, and
The anode and the cathode anode and the cathode with first gun body and second gun body respectively of the DC power supply
It is connected.
7. twin cathode axial direction feeding plasma gun according to claim 6, it is characterised in that:
The feed end of the axial direction feed pipe is connected with rotating disc type powder feeder or liquid material pump conveyer, the rotating disc type
Powder feeder is used to convey powder to the axial feed pipe, and the liquid material pump conveyer is used for outstanding to the axial feed pipe conveying
Supernatant liquid or solution presoma.
8. twin cathode axial direction feeding plasma gun according to claim 2, it is characterised in that:
The middle gun body, the lower end gun body, the upper end gun body material be brass material.
9. twin cathode axial direction feeding plasma gun according to claim 6, it is characterised in that:
The material of the cathode is tungsten alloy material, and the material of the anode is red copper material.
10. twin cathode axial direction feeding plasma gun according to claim 9, it is characterised in that:
The anode further includes liner layer, and the material of the liner layer is infusibility tungsten alloy material, and the tungsten alloy material is selected from
Any one of cerium tungsten alloy or thorium tungsten alloy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821778437.8U CN209462689U (en) | 2018-10-30 | 2018-10-30 | A kind of twin cathode axial direction feeding plasma gun |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821778437.8U CN209462689U (en) | 2018-10-30 | 2018-10-30 | A kind of twin cathode axial direction feeding plasma gun |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041396A (en) * | 2018-10-30 | 2018-12-18 | 广东省新材料研究所 | A kind of twin cathode axial direction feeding plasma gun |
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2018
- 2018-10-30 CN CN201821778437.8U patent/CN209462689U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109041396A (en) * | 2018-10-30 | 2018-12-18 | 广东省新材料研究所 | A kind of twin cathode axial direction feeding plasma gun |
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Address after: 510000 No. 363, Changxin Road, Guangzhou, Guangdong, Tianhe District Patentee after: Institute of new materials, Guangdong Academy of Sciences Address before: 510000 No. 363, Changxin Road, Guangzhou, Guangdong, Tianhe District Patentee before: GUANGDONG INSTITUTE OF NEW MATERIALS |
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