Thermal spraying powder supply device

Abstract

The utility model provides a thermal spraying powder supply device which comprises a powder supply pipe and a powder storage box, a main partition plate and a flow guide plate are fixedly connected in the powder supply pipe respectively, the main partition plate and the powder storage box are movably connected with a transmission shaft through sealing bearings, and the lower end of the transmission shaft is fixedly connected with fan blades. The upper end of the transmission shaft is fixedly connected with a dredging assembly, stirring blades and a fixing frame, meanwhile, the two ends of the fixing frame are symmetrically connected with cleaning plates, powder outlet holes are symmetrically formed in the bottom of the powder storage box, the upper surface of the powder storage box is fixedly connected with a pressure relief pipe, and the upper surface of the pressure relief pipe is slidably connected with a limiting rod through a through hole; the sealing plate is slidably connected into the pressure relief pipe through a limiting rod, and meanwhile the upper surface of the powder storage box communicates with a three-way pipe through a branch air pipe. According to the powder supply device, the powder supply pipe, the branch air pipes, the transmission shaft, the main partition plate, the flow guide plate and the dredging plate are matched, so that the powder supply device can uniformly spray powder, and the probability of unsmooth powder circulation is effectively reduced.

Description

Technical Field

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

[0002] Thermal spraying refers to a series of processes in which fine and dispersed metal or non-metallic coating materials are deposited in a molten or semi-molten state onto a prepared substrate surface to form a sprayed deposit layer; the coating material can be in powder, ribbon, filament or rod form; the thermal spray gun (referred to as thermal spray gun) uses fuel gas, electric arc or plasma arc to provide the necessary heat to heat the thermal spray material to a plastic or molten state, and then is accelerated by compressed air (or high-pressure air) to cause the constrained particle beam to impact the substrate surface; the particles impacting the surface are deformed by the stamping to form laminated flakes, which adhere to the prepared substrate surface, then cool and accumulate continuously to eventually form a layered coating. The coating can achieve functions such as high temperature corrosion resistance, wear resistance, heat insulation, and electromagnetic wave resistance due to different coating materials; however, existing thermal spraying equipment that requires powder feeding, such as plasma spraying equipment, has a matching powder feeder that, when conveying powder, if the amount of powder in the powder feeder is particularly large, once powder aggregation and agglomeration occurs, it is not easy to suck out the powder, which can easily cause uneven spraying positions and affect product quality. Utility Model Content

[0003] In order to overcome the defects of the prior art, a thermal spraying powder supply device is now provided to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, a thermal spraying powder supply device is provided, including: a powder supply pipe and a powder storage box, the powder supply pipe is connected to an air pump through a three-way pipe, and the surface of the powder supply pipe is fixedly connected to the powder storage box through a transition pipe and a confluence pipe, the main partition plate and the guide plate are respectively fixedly connected in the powder supply pipe, and the main partition plate and the powder storage box are movably connected to the transmission shaft through a sealed bearing, and the lower end of the transmission shaft is fixedly connected to the fan blade, and the upper end of the transmission shaft is respectively fixedly connected to the dredging component, the stirring blade and the fixed frame, and the cleaning plates are symmetrically connected to the two ends of the fixed frame, and the cleaning plates are symmetrically connected at both ends of the fixed frame, the powder outlet holes are symmetrically opened at the bottom of the powder storage box, and the upper surface of the powder storage box is fixedly connected to the pressure relief pipe, and the upper surface of the pressure relief pipe is slidably connected to the limit rod through the through hole, the lower end of the limit rod is fixedly connected to the sealing plate, and the sealing plate is slidably connected to the pressure relief pipe through the limit rod, and the upper surface of the powder storage box is connected to the three-way pipe through the bronchus.

[0005] Preferably, the powder supply pipe is in a square cylindrical structure, the main partition plate fixedly connected inside the powder supply pipe is in an L-shaped structure, and the transition pipe fixedly connected to the upper surface of the powder supply pipe is in a circular ring structure, and the opening on the upper surface of the powder supply pipe is adapted to the size of the inner cavity of the transition pipe.

[0006] Preferably, the bending portion of the main partition plate is inclined, and the secondary partition plate is fixedly connected to the upper surface of the main partition plate near the transmission shaft. The secondary partition plate is a long strip structure, and the cross-section formed by the main partition plate and the secondary partition plate combined together is an F-shaped structure.

[0007] Preferably, the guide plate fixedly connected to the inner cavity of the powder supply tube has a right-angled triangular prism structure, and the upper and lower surfaces of the guide plate are respectively fixedly connected to the lower surface of the main partition plate and the bottom of the inner cavity of the powder supply tube, while the fan blades and guide plate fixedly connected to the transmission shaft are in the same horizontal plane.

[0008] Preferably, the manifold has a truncated cone structure, the opening on the lower surface of the manifold is connected to the transition pipe, and the inclined surface of the manifold is opposite to the powder outlet hole opened in the powder storage box. At the same time, multiple groups of powder outlet holes evenly opened on the lower surface of the powder storage box all have a truncated cone structure, and the size of the upper opening of the powder outlet hole is smaller than the size of the lower opening.

[0009] Preferably, the dredging assembly consists of a mounting ring and a dredging plate, and the mounting ring is a circular ring structure, and the outer arc surface of the mounting ring is circumferentially surrounded by four groups of dredging plates that are fixedly connected at equal intervals, and the dredging plate is a long strip structure, and the cross-section of the dredging plate is an isosceles trapezoidal structure.

[0010] Preferably, the filter screen fixedly connected to the lower surface of the pressure relief pipe has a conical structure, and a plurality of pressure relief holes are evenly arranged on the upper end of the arc surface of the pressure relief pipe, and the sealing plate has a circular structure, and the outer arc surface of the sealing plate is fixedly connected to the sealing layer. At the same time, the axial cross-section of the limit rod fixedly connected to the upper surface of the sealing plate has a T-shaped structure, and the part of the limit rod located in the pressure relief pipe is connected to the spring.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: through the cooperation of the powder supply pipe, the main partition plate, the guide plate, the fan blades and the transmission shaft, the dredging component, the stirring blades, the fixing frame and the cleaning plate in the powder storage box can rotate synchronously, and then the powder in the powder storage box can be stirred accordingly, reducing the probability of powder agglomeration, and the setting of the dredging component can effectively prevent powder agglomerates from clogging the powder outlet holes, ensuring that normal powder can pass through the powder outlet holes smoothly, ensuring the stability of the thermal spray powder supply, and at the same time, the cooperation of the bronchial tube and the three-way pipe can help enhance the smoothness of powder outflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.

[0013] Figure 2 It is a schematic top view of a powder storage box according to an embodiment of the utility model.

[0014] Figure 3 It is a schematic top view of the powder supply pipe part of an embodiment of the utility model.

[0015] Figure 4 It is a schematic diagram of the cross-sectional structure of a pressure relief pipe according to an embodiment of the utility model.

[0016] In the figure: 1. powder supply pipe; 2. transition pipe; 3. main partition plate; 4. fan blade; 5. transmission shaft; 6. auxiliary partition plate; 7. guide plate; 8. three-way pipe; 9. bronchial pipe; 10. air pump; 11. conduit; 12. powder outlet hole; 13. dredging component; 14. stirring blade; 15. powder storage box; 16. fixing frame; 17. cleaning plate; 18. filter screen; 19. pressure relief pipe; 20. limit rod; 21. sealing plate. DETAILED DESCRIPTION

[0017] Reference Figures 1 to 4 As shown, the utility model provides a thermal spray powder supply device, including: a powder supply pipe 1 and a powder storage box 15, the powder supply pipe 1 is connected to the air pump 10 through a three-way pipe 8, and the surface of the powder supply pipe 1 is fixedly connected to the powder storage box 15 through a transition pipe 2 and a confluence pipe 11, the main partition plate 3 and the guide plate 7 are respectively fixedly connected in the powder supply pipe 1, and the main partition plate 3 and the powder storage box 15 are movably connected to the transmission shaft 5 through a sealed bearing, and the lower end of the transmission shaft 5 is fixedly connected to the fan blade 4, and the upper end of the transmission shaft 5 is respectively fixedly connected to the dredging The powder storage box 15 has a through assembly 13, a stirring blade 14 and a fixing frame 16, and cleaning plates 17 are symmetrically connected at both ends of the fixing frame 16. The powder outlet holes 12 are symmetrically opened at the bottom of the powder storage box 15, and the upper surface of the powder storage box 15 is fixedly connected to the pressure relief pipe 19, and the upper surface of the pressure relief pipe 19 is slidably connected to the limit rod 20 through the through hole, and the lower end of the limit rod 20 is fixedly connected to the sealing plate 21, and the sealing plate 21 is slidably connected in the pressure relief pipe 19 through the limit rod 20. At the same time, the upper surface of the powder storage box 15 is connected to the three-way pipe 8 through the bronchial pipe 9.

[0018] In this embodiment, an appropriate amount of powder is injected into the powder storage box 15 through the feed port, and then the powder storage box 15 is erected and the switch of the air pump 10 is started. The air pump 10 inputs most of the airflow into the powder supply pipe 1 through the three-way pipe 8, and the remaining airflow flows into the bronchial tube 9. After the airflow in the bronchial tube 9 flows into the powder storage box 15, the internal air pressure of the powder storage box 15 can be pressurized accordingly, so that the airflow in the powder storage box 15 can flow into the powder supply pipe 1 through the powder outlet 12, and the powder in the powder storage box 15 can flow in synchronously with the airflow, thereby improving the smoothness of the powder outflow. The airflow flowing in the powder supply pipe 1 will be blown to the fan blades 4 under the guidance of the guide plate 7 and the main partition plate 3, so that the fan blades 4 can drive the transmission shaft 5 to rotate synchronously, so the transmission shaft 5 can drive the fixedly connected dredging component 13, the stirring blade 14, the fixing frame 16 and the cleaning plate 17 to rotate synchronously, wherein the cleaning plate 17 can The inner side of the powder storage box 15 can be cleaned accordingly to reduce the probability of powder adhesion, and the stirring blades 14 can not only stir the powder evenly, but also break the lumps in the powder accordingly, thereby reducing the probability of lumps in the powder, and can also ensure that the powder is dispersed in the powder storage box 15, so that the air flow can flow out from the powder outlet 12. The setting of the dredging component 13 can effectively prevent the powder lumps from blocking the powder outlet 12, and ensure that the powder can flow out smoothly with the air flow, thereby enhancing the stability of the thermal spraying powder supply. When the air pressure in the powder storage box 15 is too high, the air flow in the powder storage box 15 will push the sealing plate 21 to move up and squeeze the corresponding spring, so that the pressure relief hole opened by the pressure relief pipe 19 is connected to the inside of the powder storage box 15, so that the excess gas in the powder storage box 15 can be discharged smoothly, avoiding excessive air pressure in the powder storage box 15, and enhancing the safety of the supply device when in use.

[0019] As a preferred embodiment, the powder supply pipe 1 has a square cylindrical structure, the main partition plate 3 fixedly connected inside the powder supply pipe 1 has an L-shaped structure, and the transition pipe 2 fixedly connected to the upper surface of the powder supply pipe 1 has a circular ring structure, and the opening on the upper surface of the powder supply pipe 1 is matched with the size of the inner cavity of the transition pipe 2.

[0020] In this embodiment, if Figure 1 and Figure 2 The setting of the transition pipe 2 enables the manifold 11 to be smoothly fixedly connected to the powder supply pipe 1. At the same time, the setting of the main partition plate 3 can prevent the airflow blown out from the powder storage box 15 from carrying powder directly to the fan blade 4, thereby reducing the probability of damage to the fan blade 4.

[0021] As a preferred embodiment, the bending portion of the main partition plate 3 is inclined, and at the same time, the upper surface of the main partition plate 3 is fixedly connected to the secondary partition plate 6 near the transmission shaft 5. The secondary partition plate 6 is a long strip structure, and the cross-section formed by the combination of the main partition plate 3 and the secondary partition plate 6 is an F-shaped structure.

[0022] In this embodiment, if Figure 1 and Figure 3 The setting of the auxiliary partition plate 6 can limit the flow direction of the airflow in the powder storage box 15 in the powder supply pipe 1, and then can help reduce the probability of powder accumulation in the bending part of the main partition plate 3. At the same time, the structural setting of the main partition plate 3 can guide the airflow entering the powder supply pipe 1 accordingly, and help enhance the force of the airflow impacting the fan blade 4.

[0023] As a preferred embodiment, the guide plate 7 fixedly connected to the inner cavity of the powder supply pipe 1 is in a right-angled triangular prism structure, and the upper and lower surfaces of the guide plate 7 are respectively fixedly connected to the lower surface of the main partition plate 3 and the bottom of the inner cavity of the powder supply pipe 1, and the fan blades 4 and the guide plate 7 fixedly connected to the transmission shaft 5 are in the same horizontal plane.

[0024] In this embodiment, if Figure 1 and Figure 3 The structural setting of the guide plate 7 can further increase the flow velocity of the airflow flowing in the powder supply pipe 1, thereby enhancing the impact force of the airflow on the fan blades 4 and ensuring that the fan blades 4 can drive the transmission shaft 5 to rotate.

[0025] As a preferred embodiment, the manifold 11 has a truncated cone structure, the opening on the lower surface of the manifold 11 is connected to the transition pipe 2, and the inclined surface of the manifold 11 is opposite to the powder outlet hole 12 opened in the powder storage box 15. At the same time, the multiple groups of powder outlet holes 12 evenly opened on the lower surface of the powder storage box 15 are all truncated cone-shaped, and the size of the upper opening of the powder outlet hole 12 is smaller than the size of the lower opening.

[0026] In this embodiment, if Figure 1 and Figure 2 The inclined surface of the manifold 11 allows the powder to directly hit the inclined surface when the airflow carries the powder in, thereby helping to dissociate small agglomerates that may be carried in the airflow, thereby helping to enhance the fineness of the powder. At the same time, the structural setting of the powder outlet 12 can help reduce the probability of powder being blocked in the powder outlet 12.

[0027] As a preferred embodiment, the dredging assembly 13 is composed of a mounting ring and a dredging plate, and the mounting ring is a circular ring structure, and the outer arc surface of the mounting ring is circumferentially surrounded by four groups of dredging plates fixedly connected at equal intervals, and the dredging plate is a long strip structure, and the cross-section of the dredging plate is an isosceles trapezoidal structure.

[0028] In this embodiment, if Figure 1 and Figure 2 The inclined structure of the dredging plate enables the dredging plate to perform corresponding crushing processing on the powder structure that blocks the powder outlet hole 12, thereby avoiding the powder outlet hole 12 from being blocked and improving the smoothness of powder outflow.

[0029] As a preferred embodiment, the filter screen 18 fixedly connected to the lower surface of the pressure relief pipe 19 has a conical structure, and a plurality of pressure relief holes are evenly arranged on the upper end of the arc surface of the pressure relief pipe 19, and the sealing plate 21 has a circular structure, and the outer arc surface of the sealing plate 21 is fixedly connected to the sealing layer. At the same time, the axial cross-section of the limit rod 20 fixedly connected to the upper surface of the sealing plate 21 has a T-shaped structure, and the part of the limit rod 20 located in the pressure relief pipe 19 is connected to the spring.

[0030] In this embodiment, if Figure 1 and Figure 4 The sealing layer is made of soft rubber material, which can help enhance the sealing between the sealing plate 21 and the pressure relief pipe 19. At the same time, the setting of the limit rod 20 can help enhance the stability of the sealing plate 21 when it moves. The spring sleeved by the limit rod 20 ensures that when the air pressure in the powder storage box 15 reaches a certain range, the push of the sealing plate 21 will be greater than the elastic force of the spring, ensuring that the excess airflow in the powder storage box 15 can be quickly discharged. In addition, the structural setting of the filter screen 18 can help reduce the probability of powder clogging the filter screen 18, ensuring that the airflow can be discharged through the pressure relief pipe 19.

[0031] The thermal spraying powder supply device of the utility model can spray powder evenly through the cooperation of the powder supply pipe 1, the bronchial tube 9, the transmission shaft 5, the main partition plate 3, the guide plate 7 and the clearing plate, and effectively reduce the probability of poor powder circulation. At the same time, through the cooperation of the transmission shaft 5, the clearing component 13, the manifold 11, the stirring blade 14, the fixing part and the cleaning plate 17, the probability of powder agglomeration in the powder supply device can be effectively reduced, ensuring that the powder required for thermal spraying can be stably supplied.

Claims

1. A thermal spraying powder supply device, comprising: A powder supply pipe (1) and a powder storage box (15), wherein the powder supply pipe (1) is connected to an air pump (10) via a tee pipe (8), and the surface of the powder supply pipe (1) is fixedly connected to the powder storage box (15) via a transition pipe (2) and a confluence pipe (11), characterized in that: the main partition plate (3) and the guide plate (7) are respectively fixedly connected inside the powder supply pipe (1), and the main partition plate (3) and the powder storage box (15) are both movably connected to a transmission shaft (5) via a sealed bearing, and the lower end of the transmission shaft (5) is fixedly connected to a fan blade (4), and the upper end of the transmission shaft (5) is respectively fixedly connected to a dredging component (13), a stirring blade (14) and a fixing frame (16), and at the same time, cleaning plates (17) are symmetrically connected at both ends of the fixing frame (16), and powder outlet holes (12) are symmetrically opened at the bottom of the powder storage box (15), and the upper surface of the powder storage box (15) is fixedly connected to a pressure relief pipe (19), and the upper surface of the pressure relief pipe (19) is slidably connected to a limiting rod (20) through a through hole, and the lower end of the limiting rod (20) is fixedly connected to a sealing plate (21), and the sealing plate (21) is slidably connected in the pressure relief pipe (19) through the limiting rod (20), and at the same time, the upper surface of the powder storage box (15) is connected to a three-way pipe (8) through a bronchial tube (9).

2. A thermal spraying powder supply device according to claim 1, characterized in that: The powder supply pipe (1) has a square cylindrical structure, the main partition plate (3) fixedly connected inside the powder supply pipe (1) has an L-shaped structure, and the transition pipe (2) fixedly connected to the upper surface of the powder supply pipe (1) has a circular ring structure, and the opening on the upper surface of the powder supply pipe (1) and the inner cavity of the transition pipe (2) are matched in size.

3. A thermal spraying powder supply device according to claim 1, characterized in that: The bent portion of the main partition plate (3) is arranged in an inclined manner, and the upper surface of the main partition plate (3) is fixedly connected to the auxiliary partition plate (6) near the transmission shaft (5), the auxiliary partition plate (6) is in a long strip structure, and the cross-section formed by the combination of the main partition plate (3) and the auxiliary partition plate (6) is in an F-shaped structure.

4. A thermal spraying powder supply device according to claim 1, characterized in that: The guide plate (7) fixedly connected to the inner cavity of the powder supply pipe (1) is in the form of a right-angled triangular prism structure, and the upper and lower surfaces of the guide plate (7) are respectively fixedly connected to the lower surface of the main partition plate (3) and the bottom of the inner cavity of the powder supply pipe (1), while the fan blade (4) and the guide plate (7) fixedly connected to the transmission shaft (5) are located in the same horizontal plane.

5. The thermal spraying powder supply device according to claim 1, characterized in that: The manifold (11) is in a truncated cone-shaped structure, the opening on the lower surface of the manifold (11) is connected to the transition pipe (2), and the inclined surface of the manifold (11) is directly opposite to the powder outlet holes (12) provided in the powder storage box (15), and the multiple groups of powder outlet holes (12) evenly provided on the lower surface of the powder storage box (15) are all in a truncated cone-shaped structure, and the size of the upper opening of the powder outlet hole (12) is smaller than the size of the lower opening.

6. A thermal spraying powder supply device according to claim 1, characterized in that: The dredging assembly (13) is composed of a mounting ring and dredging plates, and the mounting ring is in a circular ring structure. The outer arc surface of the mounting ring surrounds four groups of dredging plates fixedly connected at equal intervals along the circumferential direction, and the dredging plates are in a long strip structure, and the cross-section of the dredging plates is in an isosceles trapezoidal structure.

7. The thermal spraying powder supply device according to claim 1, characterized in that: The filter screen (18) fixedly connected to the lower surface of the pressure relief pipe (19) has a conical structure, and a plurality of pressure relief holes are evenly arranged at the upper end of the arc surface of the pressure relief pipe (19). The sealing plate (21) has a circular structure, and the outer arc surface of the sealing plate (21) is fixedly connected to the sealing layer. At the same time, the axial cross-section of the limit rod (20) fixedly connected to the upper surface of the sealing plate (21) has a T-shaped structure, and the part of the limit rod (20) located in the pressure relief pipe (19) is sleeved with a spring.

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