A target thermal spray powder feeder

Abstract

The utility model discloses a target material thermal spraying powder feeding and storing device, including the outer tube and the coaxial setting inside the inner tube of outer tube and open upper end, the top of outer tube is provided with the top cap, the bottom of outer tube is provided with the discharge gate, the inner wall of outer tube and the outer wall of inner tube form the powder conveying channel between, and the top of powder conveying channel is connected with the upper end of inner tube, and the outer portion of outer tube is wrapped with the heating cover, be provided with the material transfer device for the powder material in the inner tube to the powder conveying channel in the inner tube of inner tube, and the target material thermal spraying powder feeding and storing device is reduced the heating range of heating cover through setting powder conveying channel between the inner wall of outer tube and the outer wall of inner tube, and the powder is heated in the process of conveying powder, effectively avoid local powder material to be continuously heated, guarantee the uniformity of powder material heated in the mixing process simultaneously.

Description

Technical Field

[0001] This utility model relates to the technical field of target material processing equipment, specifically to a target material thermal spraying powder feeding and storage device. Background Technology

[0002] Powder feeders and storage devices typically have one or more storage bins for storing large quantities of target powder. These storage bins are generally designed to be sealed to prevent the powder from getting damp, oxidized, or otherwise contaminated.

[0003] In the production process of a target material, the required metal mixed powder is heated and then thermally sprayed onto a back tube to obtain a rotating target material. The powder is mixed, baked in an oven, and then manually transferred to a powder feeder, which is time-consuming and labor-intensive, and powder loss is inevitable during the transfer process. To avoid powder loss, Chinese Utility Model Patent (application number 201520007436.3) discloses a target material thermal spraying powder feeder and storage device, which includes a powder storage tank and a stirring mechanism located inside the storage tank. The stirring mechanism mixes the powder evenly and then automatically transfers it to the powder feeder. Argon gas then drives the spray gun for spraying, effectively avoiding the inevitable powder loss during the transfer process. However, during the heating process of the powder stored on the upper side of the stirring blades in the powder storage tank, the powder has poor fluidity during storage and a long heat conduction distance, resulting in uneven heating of the powder inside the storage tank. The powder on the outer side of the storage tank will be heated preferentially and continuously, while the heating effect of the powder in the center of the storage tank will be worse. At the same time, after the powder on the outer side of the storage tank is continuously heated, the composition will deviate from the design requirements, resulting in a decrease in the electrical, optical or magnetic properties of the target material. Utility Model Content

[0004] To address the aforementioned issues, a powder feeding and storage device for thermal spraying of target materials is provided. By setting a powder conveying channel between the inner wall of the outer cylinder and the outer wall of the inner cylinder, the heating range of the heating hood is reduced, and the powder is heated during the powder conveying process. This effectively avoids continuous heating of local powder materials and ensures the uniformity of powder heating during the mixing process.

[0005] To address the existing technical problems, this utility model provides a target material thermal spraying powder feeding and storage device, including an outer cylinder and an inner cylinder coaxially disposed inside the outer cylinder and open at the top. The top of the outer cylinder is provided with a top cover, and the bottom of the outer cylinder is provided with a discharge port. A powder conveying channel is formed between the inner wall of the outer cylinder and the outer wall of the inner cylinder. The top of the powder conveying channel is connected to the upper end of the inner cylinder. The outer cylinder is wrapped with a heating cover.

[0006] The inner cylinder is equipped with a material transfer device for transferring the powder inside the inner cylinder to the powder conveying channel.

[0007] Preferably, the outer cylinder is provided with a mixing chamber located below the inner cylinder and communicating with the powder conveying channel, the discharge port is located at the bottom of the mixing chamber, and a mixing shaft is provided inside the outer cylinder, the portion of the mixing shaft located inside the mixing chamber having mixing blades.

[0008] Preferably, the stirring shaft is provided with a plurality of auxiliary rods extending upward to the powder conveying channel.

[0009] Preferably, the auxiliary rod is provided with a scraper that contacts the inner wall of the outer cylinder and the outer wall of the inner cylinder.

[0010] Preferably, the material transfer device includes a lifting plate that is horizontally arranged inside the inner cylinder and a lifting mechanism that drives the lifting plate to move up and down.

[0011] Preferably, the upper surface of the lifting plate is a conical surface.

[0012] Preferably, the stirring shaft extends from top to bottom through the lifting plate, and the portion of the stirring shaft located inside the inner cylinder is a screw section. The lifting plate is threadedly engaged with the screw section, and the inner cylinder is also provided with a guide rod that slides with the lifting plate. The screw section and the guide rod constitute the lifting mechanism.

[0013] Preferably, the inner cylinder is made of heat-insulating material or the outer surface of the inner cylinder has a heat-insulating layer.

[0014] Preferably, the top cover has heat dissipation holes.

[0015] The advantages of this utility model compared to the prior art are:

[0016] 1. By storing the powder inside the inner cylinder and setting a powder conveying channel between the inner wall of the outer cylinder and the outer wall of the inner cylinder to reduce the heating range of the heating hood, the heating efficiency of the powder inside the powder conveying channel is improved.

[0017] 2. The powder inside the powder conveying channel is stirred by the auxiliary rod and scraper to improve the mixing effect of the powder during the heating process, and the inner wall of the outer cylinder and the outer wall of the inner cylinder are scraped and cleaned in time to effectively avoid blockage inside the powder conveying channel.

[0018] 3. The stirring shaft drives the material transfer device during rotation to guide the powder in the inner cylinder to the powder conveying channel for heating, making the overall linkage of the device stronger. Attached Figure Description

[0019] Figure 1 This is a first three-dimensional structural diagram of a powder feeding and storage device for thermal spraying of target materials.

[0020] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the outer cylinder of a powder feeding and storage device for thermal spraying of target materials.

[0021] Figure 3 This is a schematic diagram of the main cross-sectional structure of the outer cylinder of a powder feeding and storage device for thermal spraying of target materials.

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the inner cylinder of a powder feeding and storage device for thermal spraying of target materials.

[0023] Figure 5 This is a schematic diagram of the auxiliary rod structure of a powder feeding and storage device for thermal spraying of target materials.

[0024] Figure 6 A schematic diagram of the three-dimensional structure of a lifting plate for a powder feeding and storage device for thermal spraying of target materials.

[0025] The numbers in the diagram are: 1. Outer cylinder; 1a. Top cover; 1b. Mixing chamber; 1c. Mixing shaft; 1c1. Mixing blade; 1c2. Secondary rod; 1c3. Scraper; 2. Inner cylinder; 2a. Lifting plate; 2b. Guide rod. Detailed Implementation

[0026] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0027] See Figures 1-3 As shown, a powder feeding and storage device for thermal spraying of target materials includes an outer cylinder 1 and an inner cylinder 2 coaxially disposed inside the outer cylinder 1 and open at the top. The outer cylinder 1 has a top cover 1a and a discharge port at the bottom. It should be noted that the inner cylinder 2 is used to store the powder required for thermal spraying of the target material. When the powder inside the inner cylinder 2 is exhausted, the top cover 1a of the outer cylinder 1 can be opened to replenish the powder inside the inner cylinder 2.

[0028] See Figures 2-4 As shown, a powder conveying channel is formed between the inner wall of the outer cylinder 1 and the outer wall of the inner cylinder 2. The top of the powder conveying channel is connected to the upper end of the inner cylinder 2. The outer cylinder 1 is covered with a heating hood. A material transfer device is provided inside the inner cylinder 2 to transfer the powder inside the inner cylinder 2 into the powder conveying channel. It should be noted that by setting up the powder conveying channel, the heating range of the heating hood can be reduced, and heat can be quickly accumulated in a smaller space. When the powder is moved into the powder conveying channel by the material transfer device, it is quickly heated, thus improving the heating efficiency of the powder.

[0029] See Figure 2 and Figure 3As shown, the outer cylinder 1 has a mixing chamber 1b located below the inner cylinder 2 and communicating with the powder conveying channel. The discharge port is located at the bottom of the mixing chamber 1b. A mixing shaft 1c is provided inside the outer cylinder 1, and the portion of the mixing shaft 1c located inside the mixing chamber 1b has mixing blades 1c1. It should be noted that the mixing chamber 1b at the bottom of the powder conveying channel uses the mixing shaft 1c to drive the mixing blades 1c1 to mix the heated powder within the powder conveying channel, and then discharges the mixed material out through the discharge port. Furthermore, the power source for the mixing shaft 1c is provided by a drive motor.

[0030] See Figure 2 and Figure 5 As shown, the stirring shaft 1c is provided with several auxiliary rods 1c2 extending upward to the powder conveying channel. Each auxiliary rod 1c2 is provided with scrapers 1c3 that contact the inner wall of the outer cylinder 1 and the outer wall of the inner cylinder 2. It should be noted that when the stirring shaft 1c drives the stirring blades 1c1 to rotate, the stirring blades 1c1 will drive the auxiliary rods 1c2 at the top to rotate, performing preliminary stirring of the powder sliding down inside the powder conveying channel. This effectively prevents the powder from melting and clogging the conveying channel after heating, and also performs preliminary stirring and mixing of the heated powder, improving the mixing efficiency. Simultaneously, when the auxiliary rods 1c2 rotate, they scrape the inner wall of the outer cylinder 1 and the outer wall of the inner cylinder 2 through the scrapers 1c3, preventing powder adhesion.

[0031] See Figure 2 and Figure 6 As shown, the material transfer device includes a lifting plate 2a horizontally disposed inside the inner cylinder 2 and a lifting mechanism for driving the lifting plate 2a to move up and down. The upper surface of the lifting plate 2a is conical. It should be noted that the lifting mechanism, in conjunction with the lifting plate 2a, can push the powder stored inside the inner cylinder 2 to the top of the inner cylinder 2 and then slide it into the powder conveying channel. The conical shape of the upper surface of the lifting plate 2a can push all the remaining powder inside the inner cylinder 2 out of the inner cylinder 2, ensuring that the powder inside the inner cylinder 2 is utilized as much as possible and avoiding powder waste.

[0032] See Figure 2 As shown, the stirring shaft 1c extends from top to bottom through the lifting plate 2a. The portion of the stirring shaft 1c located inside the inner cylinder 2 is a screw section. The lifting plate 2a is threadedly engaged with the screw section. The inner cylinder 2 is also provided with a guide rod 2b that slides with the lifting plate 2a. The screw section and the guide rod 2b constitute the lifting mechanism. It should be noted that when the stirring shaft 1c rotates, its screw section inside the inner cylinder 2 interacts with the threaded groove inside the lifting plate 2a, and under the guidance of the guide rod 2b, it drives the lifting plate 2a to move upward along the inner cylinder 2, pushing the powder into the powder conveying channel.

[0033] The inner cylinder 2 is made of heat-insulating material or has an external heat-insulating layer. The top cover 1a has heat dissipation holes. It should be noted that the inner cylinder 2 has a heat-insulating effect, which effectively prevents heat from rapidly entering the inner cylinder 2 and causing the powder to be heated for a prolonged period. Furthermore, the heat dissipation holes on the top of the top cover 1a effectively balance the pressure difference between the inside of the outer cylinder 1 and the outside environment during the heating process, allowing the mixed material to be smoothly discharged from the outlet. Simultaneously, both the heat dissipation holes and the outlet are open during the heating process and closed after the heating process stops.

[0034] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A powder feeding and storage device for thermal spraying of target materials, characterized in that, It includes an outer cylinder (1) and an inner cylinder (2) coaxially disposed inside the outer cylinder (1) and open at the top. The top of the outer cylinder (1) is provided with a top cover (1a). The bottom of the outer cylinder (1) is provided with a discharge port. A powder conveying channel is formed between the inner wall of the outer cylinder (1) and the outer wall of the inner cylinder (2). The top of the powder conveying channel is connected to the upper end of the inner cylinder (2). The outer cylinder (1) is wrapped with a heating cover. The inner cylinder (2) is provided with a material transfer device for transferring the powder inside the inner cylinder (2) into the powder conveying channel.

2. The target material thermal spraying powder feeding and storage device according to claim 1, characterized in that, The outer cylinder (1) is provided with a mixing chamber (1b) located below the inner cylinder (2) and connected to the powder conveying channel. The discharge port is located at the bottom of the mixing chamber (1b). The outer cylinder (1) is provided with a mixing shaft (1c). The portion of the mixing shaft (1c) located inside the mixing chamber (1b) has mixing blades (1c1).

3. The target material thermal spraying powder feeding and storage device according to claim 2, characterized in that, The stirring shaft (1c) is provided with several auxiliary rods (1c2) that extend upward to the powder conveying channel.

4. The target material thermal spraying powder feeding and storage device according to claim 3, characterized in that, The auxiliary rod (1c2) is provided with a scraper (1c3) that contacts the inner wall of the outer cylinder (1) and the outer wall of the inner cylinder (2).

5. A target material thermal spraying powder feeding and storage device according to claim 2, characterized in that, The material transfer device includes a lifting plate (2a) arranged horizontally inside the inner cylinder (2) and a lifting mechanism for driving the lifting plate (2a) to rise and fall.

6. A target material thermal spraying powder feeding and storage device according to claim 5, characterized in that, The upper surface of the lifting plate (2a) is a conical surface.

7. A powder feeding and storage device for thermal spraying of target materials according to claim 5, characterized in that, The stirring shaft (1c) passes through the lifting plate (2a) from top to bottom. The part of the stirring shaft (1c) located inside the inner cylinder (2) is a screw part. The lifting plate (2a) is threadedly engaged with the screw part. The inner cylinder (2) is also provided with a guide rod (2b) that slides with the lifting plate (2a). The screw part and the guide rod (2b) constitute the lifting mechanism.

8. A powder feeding and storage device for thermal spraying of target materials according to any one of claims 1-7, characterized in that, The inner cylinder (2) is made of heat-insulating material or the outer surface of the inner cylinder (2) has a heat-insulating layer.

9. A powder feeding and storage device for thermal spraying of target materials according to any one of claims 1-7, characterized in that, The top cover (1a) has heat dissipation holes.

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