Supersonic speed thermal spraying powder feeding assembly

Abstract

The utility model discloses a supersonic speed hot spraying powder feeding assembly, which relates to the technical field of supersonic speed hot spraying, and comprises a base, the top end of the base is fixedly connected with an air tank, the top end of the air tank is fixedly connected with an air pump, the top end of the base is provided with a material storage barrel, the bottom end of the material storage barrel is communicated with one end of a material guide pipe, and the other end of the material guide pipe is communicated with an air outlet. The other end of the material guiding pipe communicates with a feeding box, the side wall of the gas tank communicates with one end of a gas spraying pipe, and the other end of the gas spraying pipe communicates with the interior of the feeding box. High-pressure gas is continuously jetted in the feeding box through the gas jetting pipe, after powder particles in the material storage barrel enter the feeding box through the material guiding pipe, the pressure intensity of the position where the flow speed of fluid is large is small, and therefore suction force in a certain area is generated, and due to the fact that the speed of gas jetted by the gas jetting pipe is high, the suction force is small. The powder particles can be sprayed out of the feeding box more quickly and efficiently, and the feeding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of supersonic thermal spraying, in particular to a supersonic thermal spraying powder feeding component. Background Art

[0002] Supersonic flame spraying is a new type of thermal spraying technology invented by Browing in the United States in 1981. The core of the supersonic flame spraying equipment is the spray gun, which consists of three parts: a combustion chamber, a Laval nozzle and a long nozzle with equal cross-section.

[0003] The spraying material used in supersonic flame spraying needs to be quantitatively transported into the combustion chamber, and is ejected through the nozzle to form a supersonic high-temperature flame flow along with the expanding gas in the combustion chamber. Most existing supersonic flame spraying powder feeders use a motor to drive a drum, which pushes the powder into the gas-powder mixing chamber. However, the air pressure difference between the powder feeding port and the inside of the powder feeder is usually difficult to control, which affects the powder feeding and spraying effects. In addition, most traditional powder feeders are integrated with the spray gun, and the internal volume of the powder feeder is limited. During the spraying process, powder particles to be sprayed need to be frequently added.

[0004] The existing patent (publication number: CN112410714A) and a supersonic flame spraying powder feeder include a powder bin and an air pump. The powder bin is filled with powder particles. The bottom of the powder bin is connected to a feeding barrel. A spiral feeder is embedded in the feeding barrel. One end of the spiral feeder extends out of the feeding barrel. A motor is installed outside the feeding barrel. A cylinder is installed on the top of the cylinder mounting frame. A movable shaft is installed at the telescopic shaft end of the cylinder. The movable shaft penetrates into the feeding barrel. A pin mounting plate is fixed at the lower end of the movable shaft. A plurality of pins are installed at the bottom of the pin mounting plate. A partition is installed at the lower end outlet of the feeding barrel. A plurality of feeding holes are arranged inside the partition. The jet port of the air pump is connected to a high-pressure gas tank. The high-pressure gas tank is connected to an air pipe. A powder bin is arranged in the middle of the air pipe. The diameter of the powder bin is smaller than that of the air pipe. Air valves are arranged on both sides of the powder bin. The lower end outlet of the feeding barrel is connected to the powder bin. The supersonic flame spraying powder feeder has good powder feeding effect and large capacity.

[0005] However, the above technical solution still has certain shortcomings. During use, after the gas enters the powder bin, the smaller diameter of the powder bin is used to increase the gas pressure and spray out the powder particles inside the powder bin. However, in actual use, the smaller diameter of the powder bin will cause the airflow to encounter greater resistance when passing through the powder bin, resulting in a decrease in gas flow rate, and the airflow pressure cannot be increased when passing through the powder bin, so the powder delivery effect cannot be improved. Utility Model Content

[0006] Based on this, the purpose of the utility model is to provide a supersonic thermal spray powder feeding component to solve the technical problem raised in the above background that the smaller diameter of the powder bin will cause the airflow to encounter greater resistance when passing through the powder bin, resulting in a decrease in gas flow rate, and the pressure of the airflow cannot be increased when passing through the powder bin, thereby failing to improve the powder feeding effect.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a supersonic thermal spraying powder feeding assembly, comprising a base, the top of the base is fixedly connected to a gas tank, the top of the gas tank is fixedly connected to an air pump, the top of the base is provided with a material storage barrel, the bottom end of the material storage barrel is connected to one end of a material guide pipe, the other end of the material guide pipe is connected to a feeding box, the side wall of the gas tank is connected to one end of an injection pipe, and the other end of the injection pipe is connected to the interior of the feeding box.

[0008] As an optimal technical solution for a supersonic thermal spray powder feeding assembly of the utility model, the bottom end of the storage barrel is fixedly connected to a motor, the output end of the motor is fixedly connected to an auger extending into the inside of the material guide pipe, and a pressure relief valve is provided at the top of the feeding box.

[0009] As a preferred technical solution of a supersonic thermal spray powder feeding assembly of the utility model, the side wall of the feeding box is connected to a connecting end, the outer wall of the connecting end is fixedly sleeved with a connecting ring, and the inner wall of the connecting ring is sleeved with a nozzle end.

[0010] As a preferred technical solution of a supersonic thermal spray powder feeding assembly of the utility model, the outer wall of the nozzle end is fixedly connected with two groups of protrusions at the connection with the connecting ring, and the side wall of the connecting ring is provided with two groups of notches matching the protrusions.

[0011] As a preferred technical solution of a supersonic thermal spraying powder feeding assembly of the utility model, a baffle is fixedly connected to the inner wall of the connecting end, and a sealing ring is slidably connected to the inner wall of the connecting end.

[0012] As a preferred technical solution of a supersonic thermal spray powder feeding assembly of the utility model, the end of the nozzle end is fixedly connected to a push rod extending to the inside of the connecting end, and the end of the push rod abuts against the side wall of the sealing ring.

[0013] As a preferred technical solution of a supersonic thermal spraying powder feeding assembly of the utility model, one end of a return spring is fixedly connected to the side wall of the sealing ring, and the other end of the return spring is fixedly connected to the inner wall of the connecting end.

[0014] In summary, the utility model mainly has the following beneficial effects:

[0015] 1. The utility model continuously sprays high-pressure gas inside the feeding box through the jet pipe. After the powder particles inside the storage barrel enter the feeding box through the guide pipe, the pressure is small where the fluid flow rate is large, thereby generating suction in a certain area. In addition, since the air flow speed sprayed from the jet pipe is fast, the powder particles can be sprayed out from the inside of the feeding box more quickly and efficiently, thereby improving the feeding efficiency.

[0016] 2. The utility model fixes the nozzle end on the nozzle in advance, so that when the nozzle assembly and the powder delivery assembly are connected together, it is only necessary to insert the nozzle end into the connecting ring, and then turn the nozzle end to achieve a quick connection between the nozzle assembly and the powder delivery assembly. At the same time, when the nozzle needs to be disassembled for maintenance, the nozzle and the powder delivery assembly can be separated more quickly, thereby improving the working efficiency of the nozzle when maintenance is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the feeding box and the connection end position of the utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the connection end of the utility model;

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the pouring tube and the feeding box of the utility model.

[0021] In the figure: 1. base; 2. gas tank; 3. air pump; 4. material storage barrel; 5. material guide pipe; 6. motor; 7. auger; 8. feeding box; 9. jet pipe; 10. pressure relief valve; 11. connecting end; 12. connecting ring; 13. nozzle end; 14. bump; 15. notch; 16. baffle; 17. sealing ring; 18. push rod; 19. reset spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0023] The following describes an embodiment of the utility model based on its overall structure.

[0024] A supersonic thermal spray powder feeding component, such as Figure 1-4As shown, it includes a base 1, the top of the base 1 is fixedly connected to a gas tank 2, the top of the gas tank 2 is fixedly connected to an air pump 3, the top of the base 1 is provided with a storage barrel 4, the bottom end of the storage barrel 4 is connected to one end of a material guide pipe 5, the other end of the material guide pipe 5 is connected to a feeding box 8, the side wall of the gas tank 2 is connected to one end of an injection pipe 9, the other end of the injection pipe 9 is connected to the interior of the feeding box 8, the bottom end of the storage barrel 4 is fixedly connected to a motor 6, the output end of the motor 6 is fixedly connected to an auger 7 extending to the interior of the material guide pipe 5, the top of the feeding box 8 is provided with a pressure relief valve 10, the side wall of the feeding box 8 is connected to a connecting end 11, the outer wall of the connecting end 11 is fixedly sleeved with a connecting ring 12, and the inner wall of the connecting ring 12 is sleeved with a nozzle end 13.

[0025] The air tank 2 is continuously inflated by the air pump 3, and the high-pressure gas in the air tank 2 is ejected into the feeding box 8 through the jet pipe 9. The gases are ejected from the feeding box 8 toward the inside of the connecting end 11, and the auger 7 is driven to rotate by the motor 6. After the powder particles in the storage barrel 4 fall into the guide pipe 5, they fall into the feeding box 8 under the push of the auger 7. During the gas spraying process inside the jet pipe 9, the gases drive the powder falling into the feeding box 8, so that the powder enters the connecting end 11, and the high-speed airflow is used to drive the powder to be ejected quickly, so that the powder particles can be ejected at high speed and in large quantities during the spraying process.

[0026] Please refer to Figure 1-4 The outer wall of the nozzle end 13 is fixedly connected with two groups of protrusions 14 at the connection with the connecting ring 12, and the side wall of the connecting ring 12 is provided with two groups of notches 15 that match the protrusions 14. The inner wall of the connecting end 11 is fixedly connected with a baffle 16, and the inner wall of the connecting end 11 is slidably connected with a sealing ring 17. The end of the nozzle end 13 is fixedly connected with a push rod 18 extending to the inside of the connecting end 11, and the end of the push rod 18 abuts against the side wall of the sealing ring 17. The side wall of the sealing ring 17 is fixedly connected with one end of a return spring 19, and the other end of the return spring 19 is fixedly connected to the inner wall of the connecting end 11.

[0027] The nozzle end 13 is connected to the nozzle assembly on the spraying equipment by pushing the nozzle end 13 so that the nozzle end 13 is inserted into the connecting ring 12, so that the nozzle end 13 and the connecting square tube are docked together. At this time, the protrusion 14 slides into the notch 15 driven by the nozzle, and then the nozzle end 13 is rotated so that the nozzle end 13 drives the protrusion 14 to rotate and slide into the connecting ring 12. At this time, the protrusion 14 is blocked by the connecting ring 12, so that the nozzle end 13 and the connecting end 11 cannot be separated. In the above process, when the nozzle end 13 and the connecting end 11 are docked together, the nozzle end 13 drives the push rod 18 to extend into the connecting end 11, so that the sealing ring 17 is pushed by the push rod 18. At this time, the sealing ring 17 slides on the inner wall of the connecting end 11 under the push of the push rod 18 and compresses the reset spring 19, so that the sealing ring 17 is separated from the baffle 16. At this time, the powder particles driven by the high-speed airflow into the connecting end 11 enter the nozzle end 13 through the gap between the baffle 16 and the connecting end 11, and then enter the nozzle assembly through the nozzle end 13. When the nozzle assembly needs to be separated from the powder feeding assembly, the nozzle end 13 is rotated in the opposite direction to drive the protrusion 14 to rotate in the opposite direction. When the protrusion 14 is aligned with the notch 15, the nozzle end 13 is pulled to drive the protrusion 14 to slide out of the notch 15 so that the nozzle end 13 is separated from the connecting end 11. In the process of pulling the nozzle end 13, the nozzle end 13 drives the push rod 18 to slide out of the connecting end 11. At this time, the reset spring 19 rebounds and pushes the sealing ring to reset, so that the sealing ring is sleeved on the outer wall of the baffle 16, thereby filling the gap between the baffle 16 and the connecting end 11, so that the powder particles cannot be sprayed out of the connecting end 11 under the drive of the high-pressure airflow.

[0028] When in use, high-pressure gas is continuously sprayed inside the feeding box 8 through the jet pipe 9. After the powder particles inside the storage barrel 4 enter the feeding box 8 through the guide pipe 5, the pressure is small where the fluid flow rate is large, thereby generating suction in a certain area. In addition, since the air flow speed sprayed from the jet pipe 9 is relatively fast, the powder particles can be sprayed out from the feeding box 8 more quickly and efficiently, thereby improving the feeding efficiency.

[0029] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A supersonic thermal spray powder feeding assembly, comprising a base (1), characterized in that: The top of the base is fixedly connected to a gas tank (2), the top of the gas tank (2) is fixedly connected to an air pump (3), the top of the base is provided with a material storage barrel (4), the bottom end of the material storage barrel (4) is connected to one end of a material guide pipe (5), the other end of the material guide pipe (5) is connected to a material feeding box (8), the side wall of the gas tank (2) is connected to one end of an injection pipe (9), the other end of the injection pipe (9) is connected to the interior of the material feeding box (8); The side wall of the feeding box (8) is connected to a connecting end (11), the outer wall of the connecting end (11) is fixedly sleeved with a connecting ring (12), and the inner wall of the connecting ring (12) is sleeved with a nozzle end (13).

2. The supersonic thermal spray powder feeding assembly according to claim 1, characterized in that: The bottom end of the material storage barrel is fixedly connected to a motor (6), the output end of the motor (6) is fixedly connected to an auger extending into the interior of the material guide pipe (5), and the top end of the material feeding box (8) is provided with a pressure relief valve (10).

3. The supersonic thermal spraying powder feeding assembly according to claim 1, characterized in that: The outer wall of the nozzle end (13) is fixedly connected with two groups of protrusions (14) at the connection with the connecting ring (12), and the side wall of the connecting ring (12) is provided with two groups of notches (15) that match the protrusions (14).

4. The supersonic thermal spray powder feeding assembly according to claim 1, characterized in that: A blocking piece (16) is fixedly connected to the inner wall of the connecting end (11), and a sealing ring (17) is slidably connected to the inner wall of the connecting end (11).

5. The supersonic thermal spray powder feeding assembly according to claim 4, characterized in that: The end of the nozzle end (13) is fixedly connected to a push rod (18) extending into the interior of the connecting end (11), and the end of the push rod (18) abuts against the side wall of the sealing ring (17).

6. The supersonic thermal spray powder feeding assembly according to claim 4, characterized in that: One end of a return spring (19) is fixedly connected to the side wall of the sealing ring (17), and the other end of the return spring (19) is fixedly connected to the inner wall of the connecting end (11).

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