CN213368207U - Circumferential powder feeding type plasma generator - Google Patents
Circumferential powder feeding type plasma generator Download PDFInfo
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- CN213368207U CN213368207U CN202021650108.2U CN202021650108U CN213368207U CN 213368207 U CN213368207 U CN 213368207U CN 202021650108 U CN202021650108 U CN 202021650108U CN 213368207 U CN213368207 U CN 213368207U
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Abstract
The utility model discloses a circumference send whitewashed formula plasma generator. A circumference powder feeding type plasma generator comprises a nozzle, a lower gun body and an upper gun body, wherein the lower gun body and the upper gun body are connected with an insulating block; the tungsten electrode penetrates through the tungsten electrode seat and extends to the lower part of the lower gun body; the tungsten electrode seat is fixed on the upper gun body through a fixed seat, and the tungsten electrode can move up and down relative to the lower gun body; the nozzle is arranged below the bottom end of the tungsten electrode, and a plasma torch chamber is arranged between the lower gun body and the nozzle; the powder distributor is connected with the upper gun body and the lower gun body, and the lower part of the powder distributor is connected with the nozzle; the powder distributor is communicated with the powder feeding pipe, and the powder feeding pipe is fixedly arranged on the powder blocking device; the powder feeder is arranged below the powder distributor, the powder feeder is communicated with the powder distributor, and the powder stopper is arranged between the powder feeder and the bottom of the lower gun body; the outer side of the powder feeder and the powder blocking device is provided with an outer cover. The utility model discloses a cloth powder ware and the optimal design of powder feeder have guaranteed that alloy powder sends people to the plasma torch in succession according to predetermined ratio, improve coating shaping quality, have avoided the jam phenomenon of nozzle.
Description
Technical Field
The utility model belongs to engineering machine tool part surface protection field specifically, relates to a circumference send whitewashed formula plasma generator.
Background
The corrosive wear is the main reason for the failure of key friction pair parts of the engineering machinery. Among many techniques for improving the wear resistance and corrosion resistance of materials, plasma cladding and spray coating techniques are widely used because of their advantages of high efficiency, low consumption, green color, and the like. The plasma coating technology is characterized in that a layer of material with special physical, chemical or mechanical properties is cladded on the surface of a base material by rapidly melting alloy powder or wire through plasma beam irradiation to form a novel composite material so as to make up for the lack of high properties of the base body, such as good wear resistance, corrosion resistance and the like.
The plasma generator is the core component of plasma technology, and integrates water, electricity, gas and powder systems to generate stable plasma jet flow, and determines parameters and coating quality in the plasma treatment process. The improvement of the jet speed of the plasma generator and the improvement of the powder feeding mode in the plasma jet are the key research directions for optimizing the plasma technology at present.
According to the powder feeding mode, the plasma generator is divided into three types of powder feeding, namely external powder feeding, internal powder feeding and central powder feeding. The powder delivery generator has simple structure, high power and flexible method, and is a more traditional and mature spraying method. For example, the Chinese utility model patent with the application number of 00238202.4 and the application date of 2000, 7 and 6. Because the heat efficiency of the external powder feeding is low, the powder deposition rate is low, and the method is suitable for spraying cheap conventional alloy or materials with low melting point, so that high-melting-point materials such as ceramics and the like are difficult to spray. The central powder-feeding generator feeds powder into the gun from the central axis of the gun body. For example, the Chinese utility model patent with application number 201510669847.3, application date 2015, 10 months and 16 days. In the powder feeding mode, the powder is heated in the gun for a long time, the particle speed is high, the coating quality is good, the thermal efficiency is very high, the energy is greatly saved, the powder flying rate is extremely low, and the powder feeding method is more suitable for spraying precious materials. However, for low melting point or very fine powder materials, the generator tends to clog the nozzle due to powder vaporization, and this approach has certain difficulties in achieving it. The inner powder-feeding generator blows the sprayed powder into the plasma torch vertically or at a certain angle in the nozzle, the powder directly enters the flame flow high-temperature area, the heat efficiency of the spray gun is high, the powder deposition rate is high, and the coating quality is better than that of the outer powder-feeding. The generator can be used for spraying common industrial coatings, is more suitable for spraying high-melting-point or precious materials, and has industrial coatings with higher requirements.
At present, the plasma generator mostly carries out powder feeding within the range, but the powder feeding position and angle still have defects. If the distance between the powder feeding port and the end face of the nozzle is too small, insufficient heating is easily caused, the powder is not melted well, and the bonding force between the coating and the substrate is reduced. If the distance of the powder feeding port is too large, the powder is melted in advance, which easily results in larger droplets, leading to nozzle clogging and deterioration of coating quality. Therefore, in order to improve the thermal efficiency and the service life of the plasma, and to improve the uniformity of powder delivery and the quality of the coating, there is a strong need for an improved powder feeding manner of the plasma generator.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at solving the not enough among the prior art, through the structure of improving the generator, optimize the distribution and the preheating mode of powder, improve homogeneity and the coating quality that the powder was supplied with, provide a circumference and send whitewashed formula plasma generator. The purpose of the utility model is that,
the technical scheme is as follows: a circumference powder feeding type plasma generator comprises a nozzle, a lower gun body, an upper gun body and an insulating block, wherein the top of the lower gun body and the bottom of the upper gun body are connected with the insulating block; a tungsten electrode penetrates through the tungsten electrode seat and extends to the lower part of the lower gun body; the tungsten electrode seat is fixed on the upper gun body through a fixed seat, and the tungsten electrode can move up and down relative to the lower gun body; the nozzle is arranged below the bottom end of the tungsten electrode, a plasma torch chamber is arranged between the lower gun body and the nozzle, and the plasma torch chamber is communicated with the gas feed pipe; the powder distributor is connected with the upper gun body and the lower gun body, and the lower part of the powder distributor is connected with the nozzle; the powder distributor is communicated with the powder feeding pipe, and the powder feeding pipe is fixedly arranged on the powder blocking device; the powder feeder is arranged below the powder distributor, the powder feeder is communicated with the powder distributor, and the gap between the powder feeder and the powder distributor is adjustable; the powder blocking device is arranged between the powder feeding device and the bottom of the lower gun body; the outer side of the powder feeder and the powder blocking device is provided with an outer cover.
The utility model discloses a further improvement lies in, is equipped with the axial slot on the cloth powder ware.
The utility model has the further improvement that the powder distributor is fixed on the lower gun body through the threaded connection.
The utility model discloses a further improvement lies in, tungsten utmost point seat and fixing base spiro union, fixing base and lower rifle body fixed connection.
The utility model discloses a further improvement lies in, and the dustcoat is equipped with the gas board that divides, divides the gas board to be connected with the dustcoat through the screw.
The utility model discloses a further improvement lies in, and the dustcoat passes through threaded connection on keeping off the powder ware.
The utility model discloses a further improvement lies in, and the lower rifle body links to each other with independent condenser tube separately with the last rifle body respectively, and the condenser tube that links to each other with the lower rifle body and the last rifle body links to each other with the two poles of the earth of power respectively.
Compared with the prior art, the utility model provides a pair of powder formula plasma generator is sent to circumference has realized following beneficial effect at least:
(1) the utility model discloses circumference send whitewashed formula plasma generator, through the flexible of adjustment tungsten utmost point 14, adjust nozzle 1's position, can optimize and send whitewashed position and angle, improve coating shaping quality.
(2) Through the optimal design of the powder distributor and the powder feeder, the air supply quantity can be adjusted by adjusting the upper position and the lower position of the outer cover, so that the feeding speed of particles with different specific weights in the powder is adjusted, the alloy powder is continuously fed into a plasma torch according to a preset ratio, the coating forming quality is improved, and the blocking phenomenon of a nozzle is avoided.
(3) The utility model discloses a circumference send whitewashed formula plasma generator, alloy powder has obtained evenly preheating in evenly getting into the powder feeder along the axial slot of circumference mode through the powder distributor, has reduced the coating defect.
(4) The utility model discloses be adapted to surface machining, whole size can carry out nimble design according to the work piece size.
Of course, it is not necessary for any product of the present invention to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic top view of the present invention;
fig. 3 is a schematic view of a groove structure of the powder distributor.
Wherein, 1-a nozzle; 2-powder feeder; 3-gas distribution plate; 4-screws; 5-a powder distributor; 6-outer cover; 7-powder blocking device; 8-a connection screw; 9-setting the gun body; 10-upper gun body; 11-a bolt; 12-a fixed seat; 13-tungsten polar mount; 14-tungsten electrode; 15-cooling water pipes; 16-an air feed pipe; 17-an insulating block; 18-plug; 19-powder feeding pipe.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
As shown in fig. 1, a circumferential powder feeding type plasma generator comprises a nozzle 1, a lower gun body 9, an upper gun body 10 and an insulating block 17, wherein the top of the lower gun body 9 and the bottom of the upper gun body 10 are connected with the insulating block 17; a tungsten electrode 14 penetrates through the tungsten electrode base 13 and extends to the lower part of the lower gun body 9; the tungsten electrode base 13 is fixed on the upper gun body 10 through the fixed base 12, and the tungsten electrode 14 can move up and down relative to the lower gun body 9; the nozzle 1 is arranged below the bottom end of the tungsten electrode 14, a plasma torch chamber is arranged between the lower gun body 9 and the nozzle 1, and the plasma torch chamber is communicated with the gas feed pipe 16; the powder distributor 5 is connected with the upper lower gun body 9, and the lower part of the powder distributor 5 is connected with the nozzle 1; the powder distributor 5 is communicated with the powder feeding pipe 19, and the powder feeding pipe 19 is fixedly arranged on the powder blocking device 7; the powder feeder 2 is arranged below the powder distributor 5, the powder feeder 2 is communicated with the powder distributor 5, and the powder stopper 7 is arranged between the powder feeder 2 and the bottom of the lower gun body 9; the outer sides of the powder feeder 2 and the powder stopper 7 are provided with outer covers 6. In the above embodiment, the lower gun body 9 and the upper gun body 10 are mounted on the movement mechanism of the device through the insulating block 17. The lower gun body 9 and the upper gun body 10 are respectively connected with an insulating block 17 through a connecting screw 8 and a bolt 11, and are kept insulated.
Based on the above embodiment, the tungsten electrode 14 extends downward to the lower part of the lower gun body 9, generates a plasma torch with the nozzle 1 under high pressure, and fully preheats the powder through the powder distributor 5 and the powder stopper 7, thereby heating the alloy powder and improving the forming performance. Meanwhile, the powder feeding position and angle can be optimized and the coating forming quality can be improved by adjusting the extension and retraction of the tungsten electrode 14 and the position of the nozzle 1.
To further explain the present embodiment, it should be noted that, as shown in fig. 2, the powder distributor 5 is provided with an axial groove. In the embodiment, the arrangement of the axial grooves enables powder to uniformly enter the powder feeder 2 along the circumference and to be uniformly preheated by the plasma torch, so that the coating defects are reduced.
To further explain the present embodiment, it should be noted that the powder distributor 5 is fixed to the lower gun body 9 by a screw connection. In this embodiment, the gap between the powder distributor 5 and the powder feeder 2 is adjusted by rotating the powder distributor 5, so that the powder feeding speed suitable for production is obtained.
To further explain the embodiment, it should be noted that the tungsten electrode base 13 is screwed with the fixing base 12, and the fixing base 12 is fixedly connected with the lower gun body 9. In this embodiment, the tungsten electrode 14 is fixed on the upper gun body 10 through the fixing base 12 and the tungsten electrode base 13, so that the tungsten electrode can be fastened quickly and the extension length can be adjusted.
To further explain the present embodiment, it should be noted that the outer cover 6 is provided with the gas distribution plate 3, and the gas distribution plate 3 is connected to the outer cover 6 by screws. In this embodiment, the shielding gas is sent to the outer cover 6 through the gas distribution plate 3 to protect the high-temperature processing position. Meanwhile, the gas distribution plate 3 is connected to the gas distribution plate 3 through screws 4, and the gas distribution plate is convenient to detach and maintain.
To further explain the present embodiment, it should be noted that the housing 6 is screwed to the powder stopper 7. The outer cover 6 is connected to the powder blocking device 7 through threads, the air supply quantity can be adjusted by adjusting the upper position and the lower position of the outer cover 6, and the feeding speed of particles with different specific gravities in the powder can be adjusted.
To further explain the present embodiment, it should be noted that the lower gun body 9 and the upper gun body 10 are connected to separate cooling water pipes 15, respectively, and the cooling water pipes 15 connected to the lower gun body 9 and the upper gun body 10 are connected to both poles of the power supply, respectively. The end of the water channel is circulated and cooled by a loop formed by a plug 18.
According to the above embodiment, the utility model provides a pair of, following beneficial effect has been realized at least:
(1) the utility model discloses circumference send whitewashed formula plasma generator, through the flexible of adjustment tungsten utmost point 14, adjust nozzle 1's position, can optimize and send whitewashed position and angle, improve coating shaping quality.
(2) Through the optimal design of the powder distributor 5 and the powder feeder 2, the air supply quantity can be adjusted by adjusting the upper position and the lower position of the outer cover 6, so that the feeding speed of particles with different specific gravities in the powder is adjusted, the alloy powder is continuously fed into a plasma torch according to a preset proportion, the coating forming quality is improved, and the blocking phenomenon of a nozzle is avoided.
(3) The utility model discloses a circumference send whitewashed formula plasma generator, alloy powder has obtained evenly preheating in evenly getting into the powder feeder along the axial slot of circumference mode through the powder distributor, has reduced the coating defect.
(4) The utility model discloses be adapted to surface machining, whole size can carry out nimble design according to the work piece size.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (7)
1. The circumferential powder feeding type plasma generator is characterized by comprising a nozzle (1), a lower gun body (9), an upper gun body (10) and an insulating block (17), wherein the top of the lower gun body (9) and the bottom of the upper gun body (10) are connected with the insulating block (17);
a tungsten electrode (14) penetrates through the tungsten electrode seat (13) and extends to the lower part of the lower gun body (9); the tungsten electrode seat (13) is fixed on the upper gun body (10) through a fixed seat (12), and the tungsten electrode (14) can move up and down relative to the lower gun body (9);
the nozzle (1) is arranged below the bottom end of the tungsten electrode (14), a plasma torch chamber is arranged between the lower gun body (9) and the nozzle (1), and the plasma torch chamber is communicated with a gas feed pipe (16);
the powder distributor (5) is connected with the lower gun body (9) above the powder distributor, and the lower part of the powder distributor (5) is connected with the nozzle (1); the powder distributor (5) is communicated with a powder feeding pipe (19), and the powder feeding pipe (19) is fixedly arranged on the powder blocking device (7);
the powder feeder (2) is arranged below the powder distributor (5), the powder feeder (2) is communicated with the powder distributor (5), and the gap between the powder feeder (2) and the powder distributor (5) is adjustable;
the powder blocking device (7) is arranged between the powder feeder (2) and the bottom of the lower gun body (9);
and outer covers (6) are arranged on the outer sides of the powder feeder (2) and the powder blocking device (7).
2. The plasma generator of claim 1, wherein the powder distributor (5) is provided with axial grooves.
3. The plasma generator of claim 1, wherein the powder distributor (5) is fixed on the lower gun body (9) by screw connection.
4. The plasma generator of claim 1, wherein the tungsten electrode holder (13) is screwed with the fixed holder (12), and the fixed holder (12) is fixedly connected with the lower gun body (9).
5. The plasma generator of claim 1, wherein the housing (6) is provided with a gas distribution plate (3), and the gas distribution plate (3) is connected with the housing (6) through screws.
6. The plasma generator of claim 1, wherein the housing (6) is screwed to the powder stopper (7).
7. The plasma generator of claim 1, wherein the lower gun body (9) and the upper gun body (10) are connected to separate cooling water pipes (15), and the cooling water pipes (15) connected to the lower gun body (9) and the upper gun body (10) are connected to both poles of a power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021650108.2U CN213368207U (en) | 2020-08-10 | 2020-08-10 | Circumferential powder feeding type plasma generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021650108.2U CN213368207U (en) | 2020-08-10 | 2020-08-10 | Circumferential powder feeding type plasma generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213368207U true CN213368207U (en) | 2021-06-04 |
Family
ID=76143941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021650108.2U Expired - Fee Related CN213368207U (en) | 2020-08-10 | 2020-08-10 | Circumferential powder feeding type plasma generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213368207U (en) |
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2020
- 2020-08-10 CN CN202021650108.2U patent/CN213368207U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210604 Termination date: 20210810 |
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| CF01 | Termination of patent right due to non-payment of annual fee |