CN210151206U

CN210151206U - Filter device for plasma spraying equipment

Info

Publication number: CN210151206U
Application number: CN201920965927.7U
Authority: CN
Inventors: 赵梓羽
Original assignee: Beijing Aviation Baichuan Science And Technology Development Center
Current assignee: Beijing Aviation Baichuan Science And Technology Development Center
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-03-17
Anticipated expiration: 2029-06-25

Abstract

The utility model provides a filter equipment for plasma spraying equipment, including the back rifle body, the back rifle body is connected with the preceding rifle body through insulating cover, and the middle part of the back rifle body, insulating cover, preceding rifle body is seted up porosely, installs the tungsten utmost point in the hole, and another part hole of the preceding rifle body is material passageway, is equipped with feedstock channel on the preceding rifle body, and feedstock channel and material passageway communicate, are equipped with the material pump on the feedstock channel, and feedstock channel sets up in the material storage box, is equipped with filter equipment in the material storage box; the utility model discloses a filter equipment can filter the powder, filters away the great impurity in the air, mainly is to carry out vibration filter to the powder, can make the powder piece dispersion of powder, makes the powder more fine and smooth that enters into in the spray gun, easily heats, makes the powder change in melting, makes the porosity of coating low, and the adhesive force is good, and then makes the quality of coating better, prevents that the coating from appearing droing and falling the phenomenon of powder.

Description

Filter device for plasma spraying equipment

Technical Field

The utility model relates to a spraying technical field, concretely relates to a filter equipment for plasma spraying equipment.

Background

Plasma spraying is a material surface strengthening and surface modifying technology based on plasma, and can enable the surface of a matrix to have the performances of wear resistance, corrosion resistance, high-temperature oxidation resistance, electric insulation, heat insulation, radiation protection, wear reduction, sealing and the like. The main characteristics are as follows:

1. the heat influence on the matrix in the spraying process is small, the part is not deformed, and the heat treatment property of the matrix metal is not changed;

2. the material for plasma spraying is very wide, and spraying layers with various performances can be obtained;

3. the process is stable, and the coating quality is high;

4. the coating is flat and smooth, and the thickness can be accurately controlled.

Plasma spraying is a thermal spraying surface processing method which adopts rigid non-transfer plasma arc as a heat source, heats a powder material to be sprayed to a molten or semi-molten state, atomizes and accelerates the powder material to be sprayed to the surface of a pretreated workpiece through high-speed flame flow, and forms a spraying coating; the spraying principle is that a plasma torch (also called a plasma arc generator) is used for generating plasma flame flow, a tungsten electrode (cathode) and a nozzle (anode) of the torch are respectively connected with a negative electrode and a positive electrode of a power supply, and electric arcs are ignited through high-frequency sparks, so that working gas (Ar or N2) supplied to the torch is ionized into plasma under the action of the electric arcs; under the combined action of mechanical compression effect, self-magnetic compression effect and thermal compression effect, the electric arc is compressed to form a non-transfer plasma arc, the powder flow is fed to convey the powder spraying material into the plasma arc, the powder spraying material is rapidly heated to a molten or semi-molten state, the powder flow impacts the surface of the pretreated base material at a high speed along with the plasma flow, and a firm spraying layer is formed on the surface of the base material, so that the sprayed surface of the part obtains various special physical and chemical properties such as different hardness, wear resistance, heat resistance, corrosion resistance, insulation, heat insulation, lubrication and the like, so as to meet the requirements of different working conditions of the part, in the process of forming the coating, a single molten particle is a basic unit for forming the coating, the behavior of the single particle basically reflects the characteristics of the formation of the coating, and the behavior of: firstly, feeding the spraying material into a heat source; then the interaction process of the spraying material and the heat source is carried out, the material is heated, melted and accelerated under the action of the heat source, and meanwhile, the action process of high-temperature and high-speed particles and the ambient atmosphere also occurs, particularly for metal materials, the entrainment of air in the heat source can cause the reaction of the spraying particles and the atmosphere, such as oxidation and the like; finally, the collision, transverse flow flattening and rapid cooling solidification of the high-temperature and high-speed molten particles and the aggregate are completed in a very short time of tens of microseconds; when the surface of a product is sprayed by using plasma spraying, a plasma spray gun is moved by a robot arm to make the plasma spray gun regularly reciprocate on the surface of the product to form a spraying layer, but in the spraying process in the prior art, some impurities exist in the sprayed powder, and some powder lumps can be generated by directly using the powder put into a powder box, so that the powder is difficult to completely melt in the melting process due to the existence of the powder lumps, the incompletely melted powder falls down from a spray gun opening and is attached to the surface of the coating, and then the powder is covered by the next coating, and the powder inside the coating has the influence on the adhesive force and the porosity of the coating, thereby influencing the quality of the coating and leading the coating to have the phenomena of falling and powder falling; therefore, a new technical solution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that exists among the above-mentioned prior art, the utility model provides a filter equipment for plasma spraying equipment, the utility model discloses can filter the powder, filter away the great impurity in the air, mainly carry out vibration filter to the powder, can make the powder piece dispersion of powder, make the powder that enters into in the spray gun more fine and smooth, easily heat, make the powder change in melting, make the porosity of coating low, the adhesive force is good, and then make the quality of coating better, prevent that the coating from appearing droing and falling the phenomenon of powder.

The utility model provides a filter equipment for plasma spraying equipment, including the back rifle body, the back rifle body is connected with the preceding rifle body through insulating cover, the middle part of the back rifle body, insulating cover, preceding rifle body is seted up porosely, install the tungsten utmost point in the hole of the back rifle body, insulating cover and part preceding rifle body, another part hole of the preceding rifle body is material passageway, be equipped with feedstock channel on the preceding rifle body, feedstock channel and material passageway intercommunication, feedstock channel is equipped with the material pump; the feeding channel is arranged in the material storage box, a filtering device is arranged in the material storage box and comprises a shell, a feeding opening is formed in the top of the shell, a first filtering net is arranged in the shell and fixed in the shell through a spring, a material guide plate is fixed to the lower portion of the first filtering net, a gap is formed between the material guide plate and the inside of the shell, and the material guide plate is connected with the inside of the shell through a vibrator; the lower part of the first filter screen is provided with a second filter screen, the second filter screen is connected with the material guide plate, and the bottom of the shell is provided with a discharge hole.

And a blower is arranged on one side of the material storage box, which is close to the filtering device.

The material guide plate is also connected with the inside of the shell through a spring.

The upper portion of casing still is equipped with the charge door, the charge door is seted up on the charge door.

The air outlet gun is characterized in that an air outlet channel and an air inlet channel are formed in the foregun body, the direction of the air outlet channel is consistent with that of the material channel, the air inlet channel is connected with an air conveying pipe, and the air conveying pipe is connected with a compressed air source.

The top of the material storage box is provided with a movable end cover.

The shell comprises a first shell and a second shell, and the first shell is movably connected with the second shell.

Due to the adoption of the technical scheme, compared with the prior art, the utility model provides a filter equipment for plasma spraying equipment, the utility model discloses a filter equipment can filter the powder, filters away the great impurity in the air, mainly vibrates the filtration to the powder, can make the powder piece dispersion of powder, makes the powder that enters into the spray gun more exquisite, and easy heating makes the powder more easily melt, makes the porosity of coating low, and the adhesive force is good, and then makes the quality of coating better, prevents that the coating from coming off and falling the phenomenon of powder; furthermore, the utility model discloses still set up air outlet channel, utilized compressed air source can blow away the product surface with the impurity in the powder of not complete melting and the air, guaranteed the quality of product coating, simultaneously, the gas that blows off can cool off the base member simultaneously, avoids at spraying in-process base member high temperature, makes the base member appear deformation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic structural view of the filtering apparatus of the present invention;

reference numerals:

1. a rear gun body 2, an insulating sleeve 3, a front gun body 4, a tungsten electrode 5 and a material channel

6. Feed channel 7, power supply 8, high-frequency generator 9 and working gas channel

10. Material pumping pump 11, material storage box 12, filtering device 13 and shell

14. First shell 15, second shell 16, charge door 17, charge door

18. A first filter screen 19, a spring 20, a material guide plate 21, a vibrator 22 and a second filter screen

23. Discharge port 24, blower 25, movable end cover 26 and air outlet channel

27. An air inlet passage 28, a bracket.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It should be noted that the embodiments described herein are only for illustrating and explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1 and 2, the utility model provides a filter device for plasma spraying equipment, including the back rifle body 1, the back rifle body 1 is connected with the preceding rifle body 3 through insulating cover 2, the middle part of the back rifle body 1, insulating cover 2, preceding rifle body 3 is seted up porosely, the downthehole tungsten electrode 4 that installs of the back rifle body 1, insulating cover 2 and part preceding rifle body 3, another part hole of the preceding rifle body 3 is material channel 5, be equipped with feedstock channel 6 on the preceding rifle body 3, feedstock channel 6 and material channel 5 intercommunication, the tungsten electrode 4 (negative pole) and the nozzle (positive pole) (not shown in the figure) of spray gun connect the negative pole and the positive pole of power 7 respectively, ignite the electric arc through high frequency generator 8, make the gas (Ar or N2) that supplies the spray gun work through working gas passageway 9 ionizes into plasma under the effect of electric arc; the above is the plasma spraying equipment in the prior art, and the utility model discloses do not improve this, therefore, do not do specific details; the utility model discloses the improvement of doing makes this device can filter powder, makes the more fine and smooth of powder that enters into in the spray gun, easily heats, makes the powder change in melting, makes the porosity of coating low, and the adhesive force is good, and then makes the quality of coating better, prevents that the coating from appearing droing and falling the phenomenon of powder.

The feeding channel 6 is provided with a material pumping pump 10, the material pumping pump 10 can be a material pumping pump in the prior art, the utility model does not specifically limit the material pumping pump, and the feeding channel 6 is arranged in the material storage box 11; starting a material pumping pump 10 to pump the powder material in a material storage box 11 into the spray gun through a feeding channel 6; a filtering device 12 is arranged in the material storage box 11, the filtering device 12 is used for filtering powder, the filtering device 12 is fixedly connected with the ground through a support 28, the support 28 is installed to avoid interference with the material storage box 11, and the specific form is not limited; the filtering device 12 includes a housing 13, the housing 13 includes a first housing 14 and a second housing 15, the first housing 14 and the second housing 15 are movably connected, such as a buckle, a threaded connection, etc., the present invention is not limited specifically, and the first housing 14 and the second housing 15 are disposed to facilitate installation and maintenance of the filtering device 12; as a preferable scheme, the top of the housing 13 is provided with a feed inlet 16, the upper part of the housing 13 is further provided with a feed door 17, and the feed inlet 16 is opened on the feed door 17; the operations such as replacement, cleaning and the like can be performed on the parts in the housing 13 by opening the charging door 17; a first filter screen 18 is arranged in the shell 13, the first filter screen 18 is fixed in the shell 13 through a spring 19, the spring 19 is fixed in the shell 13 through a welding mode, and the first filter screen 18 is connected with the spring 19 through welding; a material guide plate 20 is fixed at the lower part of the first filter screen 18, and the material guide plate 20 and the first filter screen 18 can be connected by welding or threaded connection, which is not specifically limited by the present invention; a gap is formed between the material guide plate 20 and the inner wall of the shell 13, and the gap is arranged for the shaking of the material guide plate 20 to fully filter the powder; the material guide plate 20 is connected with the inside of the shell 13 through a vibrator 21; preferably, the material guiding plate 20 is further connected to the inside of the casing 13 through a spring 19, so as to improve the stability of the material guiding plate 20 and prevent the material guiding plate 20 from falling off due to vibration; the spring 19 is connected with the inside of the shell 13 through welding, and the spring 19 is connected with the material guide plate 20 through welding; the vibrator 21 is arranged on the outer side of the shell 13, the vibrator 21 adopts a pneumatic vibrator in the prior art, the specific model is not specifically limited, the vibrator 21 can be connected with the shell 13 in a threaded connection or welding mode or the like, or a vibrator mounting base is arranged at the bottom of the vibrator 21 for mounting the vibrator 13; the vibrator starts to work after being connected with compressed air through an air inlet of the vibrator, and drives the material guide plate 20 to vibrate, so that the first filter screen 18 is driven to vibrate, and the input powder is filtered; the lower part of the first filter screen 18 is provided with a second filter screen 22, the second filter screen 22 is connected with the material guide plate 20, the second filter screen 22 and the material guide plate are fixed in a welding or threaded connection mode, the first filter screen 18 and the second filter screen 22 are both filter screens in the prior art, the first and second descriptions are adopted to distinguish the number and the installation positions of the filter screens, and the second filter screen 22 is arranged to further filter powder so that the powder is more uniform; the utility model is not only limited to two filter screens, and can be specifically set according to specific conditions, one or more than three of which belong to the simple deformation of the utility model and belong to the protection range of the utility model; the bottom of the shell 13 is provided with a discharge hole 23; the vibrator 21 drives the material guide plate 20 to vibrate, so as to drive the first filter screen 18 and the second filter screen 22 to vibrate, so as to filter the powder which is put into the material storage box 11, and the filtered powder enters the spray gun through the discharge port 23 and is pumped by the material pumping pump 10 to perform spraying work; as a preferable scheme, a blower 24 is arranged on one side of the material storage box 11 close to the filtering device 12, the blower 24 is arranged on the outer side of the material storage box 11, and an air inlet is formed in the position of the material storage box 11 corresponding to the blower 24; the blower 24 is a blower in the prior art, and is connected with the material storage box 11 in a threaded connection mode, a welding mode and the like, or is directly placed on the ground through the mounting base; the concrete selection is carried out according to the concrete condition, and the utility model is not limited specifically; when powder is accumulated in the material storage box 11 and is inconvenient for the feeding channel 6 to suck, the blower 24 is started, so that the powder suction effect of the feeding channel 6 is better; the top of the material storage box 11 is provided with a movable end cover 25, and the movable end cover 25 is arranged to prevent impurities in the air from entering the material storage box 11 and prevent powder loss when the blower 24 is started; blower 24 is only a preferred option and normal operation of the device is still possible when blower 24 is not used, but the powder absorption effect can also be artificially interfered with by opening movable end cap 25.

As a preferable scheme, an air outlet channel 26 and an air inlet channel 27 are formed in the front gun body 3, the direction of the air outlet channel 26 is consistent with the direction of the material channel 5, the air inlet channel 26 is connected with an air pipe (not shown), the air pipe is connected with a compressed air source (not shown), and the compressed air source is compressed air; preferably, the air outlet channels 26 and the air inlet channels 27 are vertically arranged, and at least two air outlet channels 26 are symmetrically arranged on two sides of the material channel 5; during operation, compressed air is conveyed to the air inlet channel 27 on the front gun body 3 through the air conveying pipe and then blown out through the air outlet channel 26, incompletely melted powder in the spray gun and impurities in the air in the plasma spraying process are blown away from the surface of a product, and meanwhile, the blown gas can cool a base product.

The utility model discloses a theory of operation: powder is added through a feed inlet 16, a vibrator 21 is started, a guide plate 20 is driven to vibrate through the vibrator 21, so that a first filter screen 18 and a second filter screen 22 are driven to vibrate, the added powder is filtered, the filtered powder enters a material storage box 11 through a discharge port and enters a spray gun through a material pumping pump 10 to perform spraying work; compressed air is conveyed to an air inlet channel 27 on the front gun body 1 through an air conveying pipe and then blown out through an air outlet channel 26, incompletely melted powder in a spray gun and impurities in the air in the plasma spraying process are blown off the surface of a product, and simultaneously blown gas can cool a base product.

In conclusion, due to the adoption of the technical scheme, compared with the prior art, the utility model provides a filter device for plasma spraying equipment, the utility model discloses a filter device can filter the powder, filters away the great impurity in the air, mainly vibrates the filter to the powder, can make the powder piece dispersion of powder, makes the powder that enters into the spray gun more exquisite, easily heats, makes the powder melt more easily, makes the porosity of coating low, and the adhesion is good, and then makes the quality of coating better, prevents that the coating from coming off and falling the phenomenon of powder; furthermore, the utility model discloses still set up air outlet channel, utilized compressed air source can blow away the product surface with the impurity in the powder of not complete melting and the air, guaranteed the quality of product coating, simultaneously, the gas that blows off can cool off the base member simultaneously, avoids at spraying in-process base member high temperature, makes the base member appear deformation.

The preferred mode of the present invention has been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention, and can be right to the technical solution of the present invention, and these simple variants all belong to the protection scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and various possible combinations of the embodiments are not described in detail in order to avoid unnecessary repetition.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. A filtering device for plasma spraying equipment comprises a rear gun body, wherein the rear gun body is connected with a front gun body through an insulating sleeve, the middle parts of the rear gun body, the insulating sleeve and the front gun body are provided with holes, tungsten electrodes are arranged in the holes of the rear gun body, the insulating sleeve and part of the front gun body, the other part of the holes of the front gun body are material channels, a feeding channel is arranged on the front gun body and communicated with the material channels, the filtering device is arranged in the material storage box and comprises a shell, the top of the shell is provided with a feeding port, a first filter screen is arranged in the shell and fixed in the shell through a spring, a guide plate is fixed at the lower part of the first filter screen, a gap is arranged between the guide plate and the inner wall of the shell, the material guide plate is connected with the inside of the shell through a vibrator; the lower part of the first filter screen is provided with a second filter screen, the second filter screen is connected with the material guide plate, and the bottom of the shell is provided with a discharge hole.

2. The filtering device for the plasma spraying apparatus as claimed in claim 1, wherein a blower is provided at a side of the material storage tank adjacent to the filtering device.

3. The filter device for a plasma spray apparatus as recited in claim 1, wherein the guide plate is further connected to an inside of the housing by a spring.

4. The filtering device for plasma spraying equipment as claimed in claim 1, wherein the upper part of the housing is further provided with a feed door, and the feed opening is opened on the feed door.

5. The filtering device for plasma spraying equipment as claimed in any one of claims 1 to 4, wherein the foregun body is provided with an air outlet channel and an air inlet channel, the direction of the air outlet channel is consistent with that of the material channel, the air inlet channel is connected with an air pipe, and the air pipe is connected with a compressed air source.

6. The filtering device for the plasma spraying equipment as claimed in claim 5, wherein a movable end cover is arranged at the top of the material storage tank.

7. The filtering device for plasma spraying equipment according to claim 6, wherein the housing comprises a first housing and a second housing, and the first housing and the second housing are movably connected.