Powder feeding frame for plasma spraying

Abstract

The utility model relates to a powder feeding frame for plasma spraying, which belongs to the technical field of powder feeding frames and comprises a powder feeding piece barrel, and a fixing plate is arranged in the powder feeding piece barrel. According to the powder feeding frame for plasma spraying, powder can be conveyed into upper and lower connecting pipes through upper and lower powder feeding pipes and then conveyed into upper and lower sprayers through upper and lower threaded cylinders, then the powder is distributed through the upper and lower sprayers, and a motor can be started when spraying is about to be finished in a powder feeding part cylinder; when a rotating rod rotates, a first scraping plate is driven to scrape powder attached to the inner circumferential wall of a powder feeding piece barrel, meanwhile, a rotating rod rotates to drive second scraping plates on the upper side and the lower side to scrape powder attached to the left side of a fixing plate, and the scraped powder is conveyed to a nozzle through the left side of the powder feeding piece barrel and then sprayed out. And therefore, the powder attached to the inner circumferential wall of the powder feeding piece can be conveniently cleaned, and the waste condition is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of powder feeding racks, in particular to a powder feeding rack for plasma spraying. Background Art

[0002] Plasma spraying technology uses a plasma arc driven by direct current as a heat source to heat materials such as ceramics, alloys and metals to a molten or semi-molten state, and sprays them at high speed onto the pre-treated workpiece surface to form a firmly adhered surface coating. The powder feed rack for plasma spraying is usually fixedly installed on the nozzle. This design allows the powder feed rack to work in conjunction with the spray gun to ensure that the powder is fed into the plasma jet at the correct angle and position, thereby improving the quality of the coating and spraying efficiency.

[0003] For example, Chinese patent CN214811830U discloses a plasma powder feeding rack that is conducive to accelerating the flow rate, which relates to the field of spraying technology. Attached blocks are provided on all four sides of the front edge of the powder feeding piece, and the attached blocks are fixed to the powder feeding piece as a whole. Connecting ports are provided on the outer sides of the attached blocks, and powder spraying ports are provided on the front ends of the attached blocks, and inner nozzles are provided on the inner sides of the attached blocks; connecting pieces are fixed on the inner ends of the powder feeding pipes, and the inner ends of the connecting pieces pass through the outer walls of the connecting sleeve blocks and extend into the powder feeding piece, and the inner ends of the connecting pieces correspond to the inside of the connecting ports respectively, and the connecting pieces are fixedly sleeved with the connecting ports, so that the upper and lower inner nozzles are staggered, and the left and right inner nozzles are also staggered, so that the spray powder released from each other will not conflict with each other, and the flow rate of the spray powder released is accelerated to a certain extent, solving the problem that when multiple powder feeding ports are relatively positioned, the airflow is likely to conflict when feeding powder, which not only fails to increase the flow rate of powder feeding, but also easily hinders the powder feeding work.

[0004] Although the above patent solves the problem that when multiple powder feeding ports are positioned relative to each other, air flows easily conflict during powder feeding, which not only fails to increase the flow rate of powder feeding but also easily hinders the powder feeding work, a certain amount of powder is easily attached to the inner wall of the powder feeding part when conveying powder in this patent, which is more cumbersome to clean and reduces practicality. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a powder feeding rack for plasma spraying, which has the advantages of being easy to clean the powder attached to the inner wall of the powder feeding piece, and solves the problem that a certain amount of powder is easily attached to the inner wall of the powder feeding piece when conveying powder, which is cumbersome to clean and reduces practicality.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a powder feeding rack for plasma spraying, comprising a powder feeding member cylinder, a fixing plate being provided inside the powder feeding member cylinder, a cleaning mechanism being provided on the right side of the fixing plate, a threaded barrel being provided on the upper and lower surfaces of the powder feeding member cylinder, the internal threads of the threaded barrel being sealedly connected to a connecting pipe, and the upper and lower sides of the connecting pipe, which are opposite to each other, being rotatably connected to the powder feeding pipe via a sealed bearing;

[0007] The cleaning mechanism includes a motor, a first gear, a second gear, a rotating rod, a connecting rod, a first scraper and two second scrapers. The motor is fixed to the right side of the fixed plate, the first gear is arranged on the outside of the motor output shaft, the second gear is engaged with the outside of the first gear, the second gear is fixed to the outside of the rotating rod, the rotating rod is rotatably connected to the inside of the fixed plate through a sealed bearing, the connecting rod is arranged on the back side of the left side of the rotating rod, the first scraper is arranged on the left side of the connecting rod, and the two second scrapers are arranged on the upper and lower sides of the outside of the rotating rod.

[0008] By adopting this technical solution, it is convenient to clean the powder attached to the inner peripheral wall of the powder feeding piece.

[0009] Furthermore, the top wall and the bottom wall of the inner cavity of the powder feeding component cylinder are both provided with fixed grooves, and the side walls of the inner cavity of the upper and lower fixed grooves opposite to each other are both provided with nozzles, and the opposite sides of the upper and lower threaded cylinders pass through the powder feeding component cylinder and are connected to the side opposite to the upper and lower nozzles.

[0010] By adopting this technical solution, the connecting pipes on the upper and lower sides can be twisted and removed from the inside of the upper and lower threaded barrels, making it easier to unclog the nozzle.

[0011] Furthermore, the back surface of the first scraper is in contact with the back wall of the inner cavity of the powder feeding member cylinder, and the right side of the second scraper is in contact with the left side of the fixing plate.

[0012] By adopting this technical solution, the first scraper which moves in a circular motion can scrape off the powder attached to the inner peripheral wall of the powder feeding cylinder.

[0013] Furthermore, the rotating rod is located on the transverse center axis of the fixed plate.

[0014] By adopting this technical solution, the stability of the circular movement of the first scraper is improved.

[0015] Furthermore, the second scrapers on the upper and lower sides are symmetrically distributed on the upper and lower sides of the transverse center axis of the rotating rod.

[0016] By adopting this technical solution, the powder attached to the left side of the fixed plate can be scraped off by the two second scrapers.

[0017] Furthermore, the opposite sides of the upper and lower nozzles are connected to at least two nozzles.

[0018] By adopting this technical solution, the powder in the upper and lower powder feeding pipes can be transported to the powder feeding cylinder through the upper and lower nozzles.

[0019] Furthermore, the nozzles, which are not less than two in number, are evenly distributed on opposite sides of the upper and lower nozzles.

[0020] By adopting this technical solution, the powders in the upper and lower pipes can be evenly mixed through at least two nozzles on the upper and lower sides, thereby improving the spraying effect.

[0021] Furthermore, the threaded cylinders on the upper and lower sides are symmetrically distributed on the upper and lower sides of the transverse center axis of the powder feeding component cylinder.

[0022] By adopting this technical solution, the threaded barrels on the upper and lower sides can both transport powder.

[0023] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0024] The powder feeding rack for plasma spraying can transport powder to the interior of the upper and lower connecting pipes through the upper and lower powder feeding pipes, and then transport it to the interior of the upper and lower nozzles through the upper and lower threaded cylinders. The upper and lower nozzles then distribute the powder. Inside the powder feeding cylinder, the powders on the two pipelines can be evenly mixed through the upper and lower nozzles to improve the spraying effect. When spraying is about to end, the motor can be started to drive the first scraper to scrape off the powder attached to the inner peripheral wall of the powder feeding cylinder. At the same time, when the rotating rod rotates, it drives the upper and lower second scrapers to scrape off the powder attached to the left side of the fixed plate. The scraped powder is transported to the nozzle through the left side of the powder feeding cylinder and then sprayed out, which makes it easy to clean the powder attached to the inner peripheral wall of the powder feeding cylinder and reduce waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the cleaning mechanism of the utility model;

[0027] Figure 3 This is a schematic diagram of the connection structure between the first scraper and the connecting rod of the utility model.

[0028] In the figure: 1. Powder feeding cylinder; 2. Fixed plate; 3. Cleaning mechanism; 31. Motor; 32. First gear; 33. Second gear; 34. Rotating rod; 35. Connecting rod; 36. First scraper; 37. Second scraper; 4. Threaded cylinder; 5. Connecting pipe; 6. Powder feeding pipe; 7. Fixed groove; 8. Nozzle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1 In this embodiment, a powder feeding rack for plasma spraying includes a powder feeding cylinder 1, a fixed plate 2 is provided inside the powder feeding cylinder 1, and a cleaning mechanism 3 is provided on the right side of the fixed plate 2. The cleaning mechanism 3 is convenient for cleaning the powder attached to the inner wall of the powder feeding cylinder 1. The upper and lower surfaces of the powder feeding cylinder 1 are provided with threaded cylinders 4. The internal thread of the threaded cylinder 4 is sealed and connected with a connecting pipe 5. The opposite sides of the upper and lower connecting pipes 5 are rotatably connected with a powder feeding pipe 6 through a sealed bearing. The powder feeding cylinder 1 is a powder feeding part, which is fixedly installed on the nozzle. The powder is sprayed out from the left side of the powder feeding cylinder 1, and then the powder is transported to the nozzle for spraying. The powder feeding cylinder 1 can be made of tungsten-copper alloy material.

[0031] In this embodiment, the top wall and the bottom wall of the inner cavity of the powder feeding cylinder 1 are provided with a fixed groove 7, and the side walls of the upper and lower fixed grooves 7 opposite to each other are provided with nozzles 8. The opposite sides of the upper and lower threaded cylinders 4 pass through the powder feeding cylinder 1 and are connected to the side opposite to the upper and lower nozzles 8. The opposite sides of the upper and lower nozzles 8 are connected with no less than two nozzles, and no less than two nozzles are evenly distributed on the opposite sides of the upper and lower nozzles 8. The upper and lower threaded cylinders 4 are symmetrically distributed on the upper and lower sides of the transverse center axis of the powder feeding cylinder 1.

[0032] It should be noted that the powder can be transported to the interior of the upper and lower connecting pipes 5 through the upper and lower powder feeding pipes 6, and then transported to the interior of the upper and lower nozzles 8 through the upper and lower threaded cylinders 4, and then the upper and lower nozzles 8 distribute the powder. Inside the powder feeding cylinder 1, the powders on the two pipelines can be evenly mixed through the upper and lower nozzles 8 to improve the spraying effect.

[0033] See also Figures 2 to 3In order to facilitate the cleaning of powder attached to the inner wall of the powder feeding piece, in this embodiment, the cleaning mechanism 3 includes a motor 31, a first gear 32, a second gear 33, a rotating rod 34, a connecting rod 35, a first scraper 36 and two second scrapers 37. The motor 31 is fixed to the right side of the fixed plate 2, the first gear 32 is arranged on the outside of the output shaft of the motor 31, the second gear 33 is engaged with the outside of the first gear 32, the second gear 33 is fixed to the outside of the rotating rod 34, the rotating rod 34 is rotatably connected to the inside of the fixed plate 2 through a sealed bearing, the connecting rod 35 is arranged on the back side of the left side of the rotating rod 34, the first scraper 36 is arranged on the left side of the connecting rod 35, and the two second scrapers 37 are both arranged on the upper and lower sides of the outside of the rotating rod 34. The upper and lower powder feeding pipes 6 can convey different powders and can convey the same powder at the same time.

[0034] In this embodiment, the back of the first scraper 36 is in contact with the back wall of the inner cavity of the powder feeding cylinder 1, the right side of the second scraper 37 is in contact with the left side of the fixed plate 2, the rotating rod 34 is located on the transverse center axis of the fixed plate 2, and the upper and lower second scrapers 37 are symmetrically distributed on the upper and lower sides of the transverse center axis of the rotating rod 34.

[0035] It should be noted that when the spraying is about to end, the motor 31 can be started to drive the first gear 32, the second gear 33, the connecting rod 35 and the rotating rod 34 to rotate. The connecting rod 35 can drive the first scraper 36 to scrape off the powder attached to the inner wall of the powder feeding component cylinder 1. At the same time, when the rotating rod 34 rotates, it drives the upper and lower second scrapers 37 to scrape off the powder attached to the left side of the fixed plate 2. The scraped powder is transported to the nozzle through the left side of the powder feeding component cylinder 1 and then sprayed out, which facilitates the cleaning of the powder attached to the inner wall of the powder feeding component and reduces waste.

[0036] The working principle of the above embodiment is:

[0037] The powder can be transported to the interior of the upper and lower connecting pipes 5 through the upper and lower powder feeding pipes 6, and then transported to the interior of the upper and lower nozzles 8 through the upper and lower threaded cylinders 4, and then the upper and lower nozzles 8 distribute the powder. Inside the powder feeding cylinder 1, the powders on the two pipelines can be evenly mixed through the upper and lower nozzles 8 to improve the spraying effect. When the spraying is about to end, the motor 31 can be started to drive the first gear 32, the second gear 33, the connecting rod 35 and the rotating rod 34 to rotate. The connecting rod 35 can drive the first scraper 36 to scrape off the powder attached to the inner wall of the powder feeding cylinder 1. At the same time, when the rotating rod 34 rotates, it drives the upper and lower second scrapers 37 to scrape off the powder attached to the left side of the fixed plate 2. The scraped powder is transported to the nozzle through the left side of the powder feeding cylinder 1 and then sprayed out, which makes it easier to clean the powder attached to the inner wall of the powder feeding part and reduce waste.

Claims

1. A powder feeding rack for plasma spraying, comprising a powder feeding cylinder (1), characterized in that: A fixing plate (2) is provided inside the powder feeding member cylinder (1), a cleaning mechanism (3) is provided on the right side of the fixing plate (2), a threaded barrel (4) is provided on the upper and lower surfaces of the powder feeding member cylinder (1), the internal thread of the threaded barrel (4) is sealed and connected to a connecting pipe (5), and the upper and lower sides of the connecting pipe (5) opposite to each other are rotatably connected to a powder feeding pipe (6) through a sealed bearing; The cleaning mechanism (3) comprises a motor (31), a first gear (32), a second gear (33), a rotating rod (34), a connecting rod (35), a first scraper (36) and two second scrapers (37), wherein the motor (31) is fixed to the right side of the fixed plate (2), the first gear (32) is arranged on the outside of the output shaft of the motor (31), the second gear (33) is engaged with the outside of the first gear (32), the second gear (33) is fixed to the outside of the rotating rod (34), the rotating rod (34) is rotatably connected to the inside of the fixed plate (2) through a sealed bearing, the connecting rod (35) is arranged on the back side of the left side of the rotating rod (34), the first scraper (36) is arranged on the left side of the connecting rod (35), and the two second scrapers (37) are both arranged on the upper and lower sides of the outside of the rotating rod (34).

2. The powder feeding rack for plasma spraying according to claim 1, characterized in that: The top wall and the bottom wall of the inner cavity of the powder delivery member cylinder (1) are both provided with fixed grooves (7), and the side walls of the inner cavity of the upper and lower fixed grooves (7) opposite to each other are both provided with nozzles (8), and the opposite sides of the upper and lower threaded cylinders (4) pass through the powder delivery member cylinder (1) and are connected to the side opposite to the upper and lower nozzles (8).

3. The powder feeding rack for plasma spraying according to claim 1, characterized in that: The back surface of the first scraper (36) is in contact with the back wall of the inner cavity of the powder feeding member cylinder (1), and the right side of the second scraper (37) is in contact with the left side of the fixed plate (2).

4. The powder feeding rack for plasma spraying according to claim 1, characterized in that: The rotating rod (34) is located on the transverse center axis of the fixed plate (2).

5. The powder feeding rack for plasma spraying according to claim 1, characterized in that: The second scrapers (37) on the upper and lower sides are symmetrically distributed on the upper and lower sides of the transverse center axis of the rotating rod (34).

6. The powder feeding rack for plasma spraying according to claim 2, characterized in that: The opposite sides of the upper and lower nozzles (8) are both connected to at least two nozzles.

7. The powder feeding rack for plasma spraying according to claim 6, characterized in that: The nozzles, which are not less than two in number, are evenly distributed on opposite sides of the upper and lower nozzles (8).

8. The powder feeding rack for plasma spraying according to claim 1, characterized in that: The threaded cylinders (4) on the upper and lower sides are symmetrically distributed on the upper and lower sides of the transverse center axis of the powder feeding component cylinder (1).

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