Cold spraying gun

Abstract

The utility model discloses a spray gun for cold spraying, which relates to the technical field of spray guns for cold spraying and comprises a base, a gun body mounted at one end of the base, a spray cap mounted at one end of the gun body, a filter mechanism mounted at one end of the gun body, and a spray cap sleeve ring mounted at one end of the gun body. A rectangular friction protruding block is fixedly connected to the surface of the spray cap lantern ring, a spray cap piece is installed on the surface of the spray cap lantern ring, a nozzle piece is connected to the surface of the spray cap piece in a sleeved mode, and a sealing ferrule is arranged in the spray cap lantern ring. Compressed air is output into the adjusting air channel through the adjusting through hole in the adjusting disc, the compressed air is guided to the adjusting spray hole of the adjusting base through the guiding function of the adjusting air channel, the compressed air is ejected through the adjusting spray head, the adjusting spray hole faces the front end of the adjusting base, and therefore the width of air ejected from the spray hole is adjusted. And the width of the coating is adjusted, the actual production requirement is met, and the flexibility of the spray gun in spraying use is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cold spraying guns, and particularly relates to a cold spraying gun. Background Art

[0002] Cold spraying is a spraying technology based on the principle of aerodynamics. Its working process is to use high-pressure gas (such as N2, He, air or their mixed gas, etc.) to generate supersonic flow through a converging-diverging tube. The high-speed flowing gas carries powder particles, and the powder particles impact the substrate material in a solid state and are deposited on the substrate surface through the plastic deformation of the particles to form a coating.

[0003] Currently, the cold spraying gun disclosed in the patent with publication number CN105499086B relates to cold spraying in the field of surface engineering. It is provided with a gun body, and at least 2 nozzles and n powder feeding pipes are arranged in the gun body. The n powder feeding pipes are used to feed the powder to be sprayed and the powder feeding gas for each nozzle, and each powder feeding pipe is externally connected to an independent powder feeding device through its respective pipeline; where n is an integer greater than or equal to 2. It not only optimizes the function of the nozzle and improves the adaptability of the nozzle to different powders, but also avoids the problem of separating the remaining powder after mechanical mixing. In addition, by using an appropriate combination of nozzles and large particle powders, the in-situ shot peening strengthening effect of the coating can be obtained. Controlling the powder feeding speed of different nozzles is very effective for preparing gradient composite coatings.

[0004] In order to solve the problems in the use of cold spraying guns, the prior art is to adopt a method of arranging at least 2 nozzles and n powder feeding pipes to improve the adaptability of the nozzles to different powders. However, there will still be a situation where the gun does not have a filtering function for the powder and the width of the sprayed coating cannot be adjusted, resulting in poor powder filtering effect, low efficiency, and low flexibility in the use of the gun for spraying. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a cold spraying gun to solve the problems put forward in the above background art.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A cold spray gun, comprising a base, one end of the base is equipped with a gun body, one end of the gun body is equipped with a spray cap, one end of the gun body is equipped with a filtering mechanism, the spray cap includes a nozzle collar, the nozzle collar is installed at one end of the gun body, rectangular friction bump blocks are fixedly connected to the surface of the nozzle collar, a spray cap member is installed on the surface of the nozzle collar, a nozzle member is sleeved on the surface of the spray cap member, a sealing ring is arranged inside the nozzle collar, the spray cap member and the nozzle are connected together by a dimension matching method, and then the spray cap member and the nozzle are placed into the nozzle collar by means of snapping or screwing the nozzle collar in, and at this time the sealing ring seals between the nozzle and the spray cap sleeve.

[0008] A further improvement of the technical solution of the present invention lies in that: the spray cap member includes a cap body, the cap body is installed on the surface of the nozzle collar, spray holes are opened on the surface of the cap body, the spray cap member and the nozzle are connected together by a dimension matching method, and then the nozzle collar is snapped or screwed in.

[0009] A further improvement of the technical solution of the present invention lies in that: an adjusting base is fixedly connected to the surface of the cap body, spray holes are opened on the surface of the cap body, adjusting spray holes are opened on the surface of the adjusting base, an adjusting air passage is opened inside the adjusting base, when the width of the spray needs to be adjusted, compressed air is output into the adjusting air passage through the adjusting through holes on the adjusting disc.

[0010] A further improvement of the technical solution of the present invention lies in that: the nozzle member includes a nozzle, the nozzle is sleeved inside the nozzle collar, the nozzle penetrates to the surface of the spray hole, an adjusting disc is sleeved on the surface of the nozzle, and the width of the sprayed material is adjusted by adjusting the number of adjusting through holes on the adjusting disc during actual production.

[0011] A further improvement of the technical solution of the present invention lies in that: a partition disc is fixedly connected to the surface of the adjusting disc, adjusting through holes are opened on the outer side of the partition disc, negative pressure through holes are opened on the inner side of the partition disc, and the width of the sprayed material is adjusted by adjusting the number of adjusting through holes on the adjusting disc.

[0012] A further improvement of the technical solution of the present invention lies in that: the filtering mechanism includes a discharge port, the discharge port is threadedly connected to one side of the gun body, one end of the discharge port is fixedly connected to a housing, a filter cartridge is installed inside the housing, one end of the filter cartridge is fixedly connected to a cover body, the cover body, the cover body is threadedly connected to the surface of the housing, a feed port is fixedly connected to the surface of the cover body, the cover body and the housing are connected by threads, the feed pipe is connected to the threaded joint at the feed port, and then the threaded joint at the discharge port is connected to the spray cap.

[0013] A further improvement of the technical solution of the present utility model lies in that: the filter cylinder includes a baffle and filter holes. The baffle is installed at one end of the feed port, and the filter holes are opened on the surface of the filter cylinder. The filter holes can connect the feed port and the discharge port. Filter powder flows into the inner cavity of the filter cylinder from the conveying pipe. The powder to be filtered impacts the baffle under the action of the pressure in the pipeline, so that the powder to be filtered flows out from the filter holes, and the powder flowing out from the filter holes is the filtered powder.

[0014] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model compared with the prior art is:

[0015] The present utility model provides a cold spray gun. Powder enters the inner cavity of the filter cylinder from the feed port and impacts the baffle. The powder splashes on the inner wall of the filter cylinder. The powder flows into the inner cavity from the filter holes on the side wall of the filter cylinder. The filtered powder flows out from the inner cavity through the discharge port, while impurities are blocked in the filter cylinder. The cylindrical area of the filter cylinder is larger than the filtering area of the filter mesh plate in the prior art, improving the powder filtering efficiency. At the same time, the powder flowing into the feed port changes its flow direction at the baffle and is dispersed and flows out from the filter holes, reducing the impact of the powder on the inner wall of the filter cylinder, making the filtering effect of the powder flowing out from the filter holes better.

[0016] The present utility model provides a cold spray gun. Compressed air is output to the adjustment air path through the adjustment through holes on the adjustment disc. Through the guiding action of the adjustment air path, the compressed air is led to the adjustment spray holes of the adjustment base, and the compressed air is ejected through the adjustment nozzle. The adjustment spray holes face the front end of the adjustment base, thereby adjusting the width of the ejected air jet and the width of the coating, meeting the actual production needs and improving the flexibility of the spray gun during spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a structural schematic diagram of the spray cap of the present utility model;

[0019] Figure 3 is a structural schematic diagram of the spray cap part of the present utility model;

[0020] Figure 4 is a structural schematic diagram of the filtering mechanism of the present utility model;

[0021] Figure 5 is a structural schematic diagram of the filter cylinder of the present utility model.

[0022] In the figure: 1, base; 2, gun body; 3, spray cap; 30, spray cap part; 301, cap body; 302, adjustment base; 303, adjustment spray hole; 304, spray hole; 305, adjustment air passage; 31, nozzle collar; 32, rectangular friction raised block; 33, nozzle part; 330, adjustment disc; 331, adjustment through hole; 332, negative pressure through hole; 333, nozzle; 334, partition disc; 34, sealing ring; 4, filtering mechanism; 40, housing; 41, discharge port; 42, cover body; 43, feed port; 44, filter cartridge; 440, baffle; 441, filter hole. Detailed implementation mode

[0023] The following further elaborates on the present utility model in conjunction with the embodiments: Embodiment

[0024] As Figures 1-5 shown, the present utility model provides a cold spray gun, including a base 1, one end of the base 1 is installed with a gun body 2, one end of the gun body 2 is installed with a spray cap 3, one end of the gun body 2 is installed with a filtering mechanism 4, the spray cap 3 includes a nozzle collar 31, the nozzle collar 31 is installed at one end of the gun body 2, the surface of the nozzle collar 31 is fixedly connected with a rectangular friction raised block 32, the surface of the nozzle collar 31 is installed with a spray cap part 30, the surface of the spray cap part 30 is sleeved with a nozzle part 33, the inside of the nozzle collar 31 is provided with a sealing ring 34, the spray cap part 30 includes a cap body 301, the cap body 301 is installed on the surface of the nozzle collar 31, a spray hole 304 is opened on the surface of the cap body 301, the surface of the cap body 301 is fixedly connected with an adjustment base 302, a spray hole 304 is opened on the surface of the cap body 301, an adjustment spray hole 303 is opened on the surface of the adjustment base 302, an adjustment air passage 305 is opened inside the adjustment base 302, the nozzle part 33 includes a nozzle 333, the nozzle 333 is sleeved inside the nozzle collar 31, the nozzle 333 penetrates to the surface of the spray hole 304, the surface of the nozzle 333 is sleeved with an adjustment disc 330, the surface of the adjustment disc 330 is fixedly connected with a partition disc 334, an adjustment through hole 331 is opened on the outside of the partition disc 334, and a negative pressure through hole 332 is opened on the inside of the partition disc 334;

[0025] Specifically, the spray cap 30 and the nozzle 333 are connected together by dimension matching. Then, the nozzle collar 31 is used to insert or screw in the spray cap 30 and the nozzle 333 into the nozzle collar 31. At this time, the sealing ring 34 seals the gap between the nozzle 333 and the nozzle collar 31 to prevent the compressed air at the nozzle 333 from leaking. The input end of the nozzle 333 is connected to the corresponding compressed air output end. The compressed air flows out through the negative pressure through-holes 332 to the front end of the nozzle. Under the action of negative pressure flow, the paint in the nozzle 333 is sucked out and ejected through the spray holes 304. The negative pressure through-holes 332 are arranged in twelve, which can reduce the distance between adjacent two negative pressure through-holes 332 and improve the spraying uniformity. When adjusting the width of the spray, the compressed air is output through the adjustment through-holes 331 on the adjustment disk 330 into the adjustment air path 305. Through the guiding action of the adjustment air path 305, the compressed air is led to the adjustment spray holes 303 of the adjustment base 302, and the compressed air is ejected through the adjustment nozzle. The adjustment spray holes 303 face the front end of the adjustment base 302, so as to adjust the width of the ejected air at the spray holes 304. Since the number of the negative pressure through-holes 332 is not convenient to adjust, the width of the sprayed material can only be adjusted by adjusting the number of the adjustment through-holes 331 on the adjustment disk 330 in actual production. Rectangular friction raised blocks 32 are arranged on the outer surface of the nozzle collar 31, which can facilitate the subsequent disassembly of the nozzle collar 31. Embodiment

[0026] As Figures 1-5 shown, on the basis of Embodiment 1, the present utility model provides a technical solution: Preferably, the filtering mechanism 4 includes a discharge port 41, the discharge port 41 is threadedly connected to one side of the gun body 2, one end of the discharge port 41 is fixedly connected to a housing 40, a filter cartridge 44 is installed inside the housing 40, one end of the filter cartridge 44 is fixedly connected to a cover body 42, the cover body 42 is threadedly connected to the surface of the housing 40, a feed port 43 is fixedly connected to the surface of the cover body 42, the filter cartridge 44 includes a baffle 440 and filter holes 441, the baffle 440 is installed at one end of the feed port 43, and the filter holes 441 are formed on the surface of the filter cartridge 44. The filter holes 441 can connect the feed port 43 and the discharge port 41.

[0027] Specifically, the cover 42 is threadedly connected to the housing 40. The feed pipe is connected to the threaded joint at the feed port 43, and then the threaded joint at the discharge port 41 is connected to the spray cap 3. The filtered powder flows into the inner cavity of the filter cylinder 44 from the feed pipe. The powder to be filtered impacts the baffle 440 under the action of the pressure in the pipeline, causing the powder to be filtered to flow out from the filter holes 441. The powder flowing out from the filter holes 441 is the filtered powder. After entering the housing 40, the filtered powder is supplied to the spray gun through the discharge port 41. The impurities are isolated in the filter cylinder 44, completing the filtration of the powder. The number of the filter holes 441 is 150 - 320 meshes, ensuring the filtration effect and efficiency of the powder.

[0028] Next, the working principle of the cold spray gun will be specifically described.

[0029] As Figures 1-5 shown, when it is necessary to adjust the spray width, the compressed air is output to the adjustment air path 305 through the adjustment through holes 331 on the adjustment disk 330. Through the guiding action of the adjustment air path 305, the compressed air is led to the adjustment spray holes 303 of the adjustment base 302, and the compressed air is ejected through the adjustment nozzle. The adjustment spray holes 303 face the front end of the adjustment base 302, thereby adjusting the width of the jet ejected from the spray holes 304. Since the number of the negative pressure through holes 332 is not convenient to adjust, it is only possible to adjust the width of the sprayed material by adjusting the number of the adjustment through holes 331 on the adjustment disk 330 in actual production. A rectangular friction raised block 32 is provided on the outer surface of the nozzle collar 31, which can facilitate the subsequent disassembly of the nozzle collar 31. The cover 42 is threadedly connected to the housing 40. The feed pipe is connected to the threaded joint at the feed port 43, and then the threaded joint at the discharge port 41 is connected to the spray cap 3. The filtered powder flows into the inner cavity of the filter cylinder 44 from the feed pipe. The powder to be filtered impacts the baffle 440 under the action of the pressure in the pipeline, causing the powder to be filtered to flow out from the filter holes 441. The powder flowing out from the filter holes 441 is the filtered powder. After entering the housing 40, the filtered powder is supplied to the spray gun through the discharge port 41. The impurities are isolated in the filter cylinder 44, completing the filtration of the powder. The number of the filter holes 441 is 150 - 320 meshes, ensuring the filtration effect and efficiency of the powder.

[0030] In the above text, the present invention has been generally described in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, any modifications or improvements made without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A cold spray gun, comprising a base (1), characterized in that: One end of the base (1) is equipped with a gun body (2), one end of the gun body (2) is equipped with a spray cap (3), and one end of the gun body (2) is equipped with a filtering mechanism (4). The spray cap (3) includes a nozzle collar (31), the nozzle collar (31) is installed at one end of the gun body (2), a rectangular friction raised block (32) is fixedly connected to the surface of the nozzle collar (31), a spray cap member (30) is installed on the surface of the nozzle collar (31), a nozzle member (33) is sleeved on the surface of the spray cap member (30), and a sealing ring (34) is arranged inside the nozzle collar (31).

2. The cold spray gun according to claim 1, characterized in that: The spray cap member (30) includes a cap body (301), the cap body (301) is installed on the surface of the nozzle collar (31), and spray holes (304) are formed in the surface of the cap body (301).

3. The cold spray gun according to claim 2, characterized in that: An adjusting base (302) is fixedly connected to the surface of the cap body (301), spray holes (304) are formed in the surface of the cap body (301), adjusting spray holes (303) are formed in the surface of the adjusting base (302), and an adjusting air passage (305) is arranged inside the adjusting base (302).

4. The cold spray gun according to claim 1, wherein: The nozzle member (33) includes a nozzle (333), the nozzle (333) is sleeved inside the nozzle collar (31), the nozzle (333) penetrates to the surface of the spray hole (304), and an adjusting disc (330) is sleeved on the surface of the nozzle (333).

5. The cold spray gun according to claim 4, wherein: A partition disc (334) is fixedly connected to the surface of the adjusting disc (330), adjusting through holes (331) are formed on the outer side of the partition disc (334), and negative pressure through holes (332) are formed on the inner side of the partition disc (334).

6. The cold spray gun according to claim 1, characterized in that: The filtering mechanism (4) includes a discharge port (41), the discharge port (41) is threadedly connected to one side of the gun body (2), one end of the discharge port (41) is fixedly connected to a housing (40), a filter cartridge (44) is installed inside the housing (40), one end of the filter cartridge (44) is fixedly connected to a cover body (42), the cover body (42) is threadedly connected to the surface of the housing (40), and a feed port (43) is fixedly connected to the surface of the cover body (42).

7. The cold spraying gun according to claim 6, characterized in that: The filter cartridge (44) includes a baffle (440) and filter holes (441), the baffle (440) is installed at one end of the feed port (43), the filter holes (441) are formed in the surface of the filter cartridge (44), and the filter holes (441) can communicate the feed port (43) and the discharge port (41).

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