Automatic spraying device

Abstract

The utility model discloses an automatic spraying device which comprises an additive pipeline, a high-pressure gas pipeline, a powder collecting tank and a controller, the additive pipeline is provided with a peristaltic pump and a discharging valve, the high-pressure gas pipeline is provided with an electromagnetic valve, a powder discharging pipeline is arranged on the upper portion of the powder collecting tank, and an induction valve is arranged on the powder discharging pipeline. A plurality of atomization devices are annularly arranged at the outlet end of the powder discharging pipeline, the additive pipeline and the high-pressure gas pipeline are mixed at the intersection of the pipelines to obtain a gas-liquid premix, the gas-liquid premix is atomized through the atomization devices, the discharging valve, the electromagnetic valve and the induction valve are all electrically connected with the controller, and the electromagnetic valve and the discharging valve control the on-off time through the controller. After sensing a pipeline powder discharging signal, the sensing valve transmits an execution signal to the controller; according to the utility model, the additive in the pipeline is atomized according to the required time interval through automatic blowing and then is sprayed to the raw material, so that the additive required by the product produced by the jet mill is effectively and uniformly added to the raw material in the powder collecting tank according to the requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of atomizers, and particularly relates to an automatic spraying device. Background Art

[0002] Sintered neodymium iron boron permanent magnet materials have excellent magnetic properties and are widely used in fields such as electronics, electric machinery, medical devices, toys, packaging, hardware machinery, aerospace, etc. More common ones are permanent magnet motors, loudspeakers, magnetic separators, computer disk drives, magnetic resonance imaging equipment instruments, etc.

[0003] Currently, the mainstream process is to grind the crushed coarse powder into fine powder by a jet mill. After powder making, antioxidants, grain growth inhibitors, lubricants and other additives need to be added to protect the powder and improve its performance. And after powder making, the antioxidants, grain growth inhibitors, lubricants and other additives are poured into the powder collecting tank and then mixed by a three-dimensional mixer for several hours to make the additives and the powder well mixed. However, due to the innate characteristics of the additives, such a mixing method will cause the additives and the powder to agglomerate and cake, affecting the effect of the additives and the consistency and fluidity of the formed powder, which has an adverse impact on production and performance consistency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic spraying device. When the induction valve senses the powder feeding signal of the pipeline, it transmits the execution signal to the controller. At the same time, the peristaltic pump, the feeding valve and the solenoid valve adjust the interval operation time and flow rate through the controller, so as to atomize the additives in the pipeline at the required time interval through automatic air blowing and spray them onto the raw materials, effectively adding the additives required for the products after the production of the jet mill to the raw materials in the powder collecting tank more evenly as required.

[0005] The utility model is realized through the following technical solutions:

[0006] An automatic spraying device, comprising:

[0007] An additive pipeline, which is provided with a peristaltic pump for pressurizing the additives and a feeding valve for adjusting the additive addition ratio;

[0008] A high-pressure gas pipeline, which is provided with a solenoid valve for adjusting the air blowing time;

[0009] A powder collecting tank, the upper part of which is provided with a powder feeding pipeline, and an induction valve is arranged on the powder feeding pipeline. The outlet end of the powder feeding pipeline is annularly provided with a plurality of atomizing devices. Among them, the additive pipeline and the high-pressure gas pipeline are mixed at the intersection of the pipelines to obtain a gas-liquid premix, which is atomized by the atomizing devices;

[0010] A controller, the blanking valve, the solenoid valve and the induction valve are all electrically connected to the controller. The solenoid valve and the blanking valve control the on-off time through the controller. After the induction valve senses the powder feeding signal in the pipeline, it transmits the execution signal to the controller.

[0011] As a further technical solution of the automatic spraying device, a pressure relief valve is provided on the powder feeding pipeline to balance the internal and external pressure differences of the powder collecting tank.

[0012] As a further technical solution of the automatic spraying device, a primary mixing and buffering cavity is provided at the intersection of the additive pipeline and the high-pressure gas pipeline to preliminarily mix the high-pressure gas and the additive in the pipeline.

[0013] As a further technical solution of the automatic spraying device, the additive pipeline includes a first mixing pipeline, the high-pressure gas pipeline includes a second mixing pipeline, and the primary mixing and buffering cavity includes a mixing pipeline;

[0014] The second mixing pipeline is connected to the mixing pipeline on the same axis. The first mixing pipeline is connected to the mixing pipeline obliquely. The mixing pipeline is connected to the atomizing device. Driven by the high-velocity gas, a negative pressure is formed at the connection between the first mixing pipeline and the mixing pipeline, thereby accelerating the mixing speed of the high-pressure gas and the additive.

[0015] As a further technical solution of the automatic spraying device, wing-shaped blocks are provided at the mixing connection of the first mixing pipeline, the second mixing pipeline and the mixing pipeline to further accelerate the mixing speed of the high-pressure gas and the additive.

[0016] As a further technical solution of the automatic spraying device, the leading edge of the wing-shaped block faces the outlet end of the first mixing pipeline, and the trailing edge of the wing-shaped block faces the inlet end of the mixing pipeline. The high-velocity gas will peel off when passing through the trailing edge of the wing-shaped block, preventing the un-mixed additive from accumulating in the pipeline, thereby improving the efficiency of gas-liquid premixing.

[0017] As a further technical solution of the automatic spraying device, at least 3 atomizing devices are provided and are evenly distributed around the outlet end of the powder feeding pipeline. The atomizing devices are all connected through three-way pipelines.

[0018] As a further technical solution of the automatic spraying device, the atomizing device includes an atomizing device body, a secondary mixing and buffering cavity and an atomizing nozzle;

[0019] The atomizing device body, the secondary mixing and buffering cavity, and the atomizing nozzle are connected in sequence, enabling the high-pressure gas and the additive to be more evenly mixed in the secondary mixing and buffering cavity. The outside of the atomizing device body is hermetically connected to the powder collecting tank through an external thread, and the middle part of the atomizing device body is hermetically connected to the pipeline for transporting the gas-liquid premix through an internal thread of the powder collecting tank.

[0020] As a further technical solution of the automatic spraying device, a stable channel is provided in the middle of the atomizing device body. The design of the stable channel ensures the stability of the fluid before entering the mixing chamber, reduces flow fluctuations, and improves the reliability of the system operation. The secondary mixing and buffering cavity is provided with a mixing chamber, and both ends of the mixing chamber are respectively connected to the stable channel and the atomizing nozzle. Among them, the mixing chamber is a gradually expanding cross-section chamber, and the large-diameter end of the mixing chamber is connected to the stable channel. The design of the gradually expanding cross-section chamber enhances the mixing effect of the fluid, makes the spraying more uniform, and improves the distribution consistency of the additive in the powder.

[0021] As a further technical solution of the automatic spraying device, a buffer block is provided at the top of the atomizing nozzle for adjusting the spraying range of the atomizing nozzle.

[0022] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0023] The present utility model provides an automatic spraying device. The additive pipeline transports high-pressure liquid through a peristaltic pump, the high-pressure gas pipeline transports high-pressure gas, and the powder feeding pipeline transports raw materials to the powder collecting tank. The peristaltic pump, the feeding valve, and the solenoid valve adjust the interval operation time and flow rate through a controller. When the induction valve senses the powder feeding signal in the pipeline and transmits the execution signal to the controller, the high-pressure gas pipeline atomizes the additive in the pipeline at required time intervals through automatic air blowing and sprays it onto the raw materials, effectively adding the required additive for the product after airflow milling to the raw materials in the powder collecting tank more evenly as required, thereby ensuring the uniform distribution of the additive and the powder, avoiding the agglomeration and caking of the additive, and improving the effect of the additive. Description of the Drawings

[0024] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not constitute a limitation to the embodiments of the present utility model. In the drawings:

[0025] Figure 1 is a schematic structural diagram of the present utility model;

[0026] Figure 2 is a schematic structural diagram of the primary mixing and buffering mechanism;

[0027] Figure 3 is a schematic structural diagram of the atomizing device;

[0028] Figure 4 is a schematic cross-sectional structure diagram of an atomization device;

[0029] Figure 5 is Figure 3 an enlarged structure diagram of the part marked A in

[0030] Labels in the attached drawings and corresponding component names:

[0031] 1 - additive pipeline, 2 - high-pressure gas pipeline, 3 - peristaltic pump, 4 - solenoid valve, 5 - controller, 6 - blanking valve, 7 - primary mixing and buffering cavity, 8 - mixing pipeline, 9 - atomization device, 10 - tee pipeline, 11 - powder collection tank, 12 - powder feeding pipeline, 13 - pressure relief valve, 14 - induction valve, 15 - first mixing pipeline, 16 - second mixing pipeline, 17 - airfoil block, 18 - atomization device body, 19 - secondary mixing and buffering cavity, 20 - atomization nozzle, 21 - buffer block, 22 - mixing cavity, 23 - stable channel. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with embodiments and the attached drawings. The illustrative embodiments of the present utility model and their descriptions are only used to explain the present utility model and shall not be construed as limiting the present utility model.

[0033] Embodiment 1

[0034] This Embodiment 1 provides an automatic spraying device, as Figure 1 shown, including an additive pipeline 1, a high-pressure gas pipeline 2, a powder collection tank 11 and a controller 5;

[0035] Among them, the additive pipeline 1 is equipped with a peristaltic pump 3 for pressurizing the additive and a blanking valve 6 for adjusting the additive addition ratio. The high-pressure gas pipeline 2 is equipped with a solenoid valve 4. The upper part of the powder collection tank 11 is communicated with a powder feeding pipeline 12. The powder feeding pipeline 12 is equipped with an induction valve 14 and a pressure relief valve 13. The outlet end of the powder feeding pipeline 12 is equipped with 3 atomization devices 9, and the 3 atomization devices 9 are annularly distributed along the outlet end of the powder feeding pipeline 12. At the same time, the additive pipeline 1 and the high-pressure gas pipeline 2 are mixed at the pipeline intersection to obtain a gas-liquid pre-mixture, and the gas-liquid pre-mixture is atomized by the atomization device 9, so that the additives required for the products produced by the jet mill can be added to the raw materials in the powder collection tank more evenly according to the requirements, thereby ensuring the uniform distribution of the additives and the powder, avoiding the agglomeration and caking of the additives, and improving the effect of the additives.

[0036] In this embodiment, the peristaltic pump 3, the solenoid valve 4, the blanking valve 6 and the induction valve 14 are all electrically connected to the controller 5. The solenoid valve 4, the peristaltic pump 3 and the blanking valve 6 are controlled by the controller 5 for the on-off time. After the induction valve 14 senses the powder feeding signal in the pipeline, it transmits the execution signal to the controller 5. Specifically, when the induction valve 14 senses powder feeding in the pipeline and transmits the execution signal to the controller 5, at this time, the solenoid valve 4, the peristaltic pump 3 and the blanking valve 6 are opened synchronously. After passing into the powder collecting tank 11 for a period of time, the solenoid valve 4, the peristaltic pump 3 and the blanking valve 6 are closed. After an interval of time, the solenoid valve 4, the peristaltic pump 3 and the blanking valve 6 are opened again to put additives into the powder collecting tank 11. This cycle repeats. The interval time and the adding time can both be determined according to the actual additive requirements. When the pressure in the powder collecting tank 11 increases, the pressure relief valve 13 will balance the internal and external pressure difference of the powder collecting tank 11.

[0037] In this embodiment, the peristaltic pump 3, the solenoid valve 4, the blanking valve 6 and the induction valve 14 are electrically connected to the controller 5 to achieve automatic control and ensure uniform distribution of additives. After the induction valve 14 senses the powder feeding signal, it transmits the signal to the controller 5. The controller 5 precisely controls the on-off time and the interval time of the solenoid valve 4, the peristaltic pump 3 and the blanking valve 6, avoiding agglomeration and caking of additives and optimizing the mixing effect. At the same time, the pressure relief valve 13 balances the internal and external pressure difference of the powder collecting tank 11 to ensure stable operation of the system.

[0038] In this implementation, the above-mentioned peristaltic pump 3 can select the industrial peristaltic pump F6-12L, which is suitable for large liquid volume and high-efficiency filling. The solenoid valve 4 can select the solenoid valve 4V110-06DC24V with higher sensitivity. The blanking valve 6 can select a butterfly valve such as the D371X type, which occupies less space and has rapid opening and closing. The induction valve 14 can select the electronic induction valve KSF-30, which has good powder sensing accuracy and stable control performance. The controller 5 can select the Siemens S7-200 PLC or the Omron CP1H series PLC, which has characteristics such as high reliability and flexible programming and can meet the control requirements of this process.

[0039] Embodiment 2

[0040] Based on the technical solution of Embodiment 1, this Embodiment 2 provides another automatic spraying device, as Figure 1 - Figure 2 shown, the difference is that a primary mixing and buffering cavity 7 is provided at the intersection of the additive pipeline 1 and the high-pressure gas pipeline 2;

[0041] Specifically, please refer to Figure 2As shown, the additive pipeline 1 includes a first mixing pipeline 15, the high-pressure gas pipeline 2 includes a second mixing pipeline 16, the primary mixing buffer cavity 7 includes a mixing pipeline 8. The second mixing pipeline 16 is connected to the mixing pipeline 8 in the same axis. The first mixing pipeline 15 is inclined to connect to the mixing pipeline 8. Preferably, the inclination angle is between 30 - 45 degrees. The inclination angle of 30 - 45 degrees enables the first mixing pipeline 15 and the mixing pipeline 8 to form optimal hydrodynamic conditions at the connection, which helps generate appropriate negative pressure, thereby accelerating the mixing speed of the high-pressure gas and the additive. Therefore, to achieve the best optimized mixing effect, ensure that the additive can be more evenly distributed on the powder, and avoid agglomeration and caking phenomena, the inclination angle in this embodiment is 30 degrees. At the same time, the mixing pipeline 8 is connected to the atomizing device 9. Driven by the high-flow gas, a negative pressure is formed at the connection between the first mixing pipeline 15 and the mixing pipeline 8, thereby accelerating the mixing speed of the high-pressure gas and the additive.

[0042] Embodiment 3

[0043] Based on the technical solution of Embodiment 2, Embodiment 3 provides another automatic spraying device, as Figure 1 - Figure 2 shown. The difference is that an airfoil block 17 is fixed at the mixing connection of the first mixing pipeline 15, the second mixing pipeline 16, and the mixing pipeline 8. The leading edge of the airfoil block 17 faces the outlet end of the first mixing pipeline 15, and the trailing edge of the airfoil block 17 faces the inlet end of the mixing pipeline 8. The high-flow gas will peel off when passing through the trailing edge of the airfoil block 17, avoiding the accumulation of unmixed additives in the pipeline, thereby improving the efficiency of gas-liquid premixing.

[0044] Embodiment 4

[0045] Embodiment 4 provides another automatic spraying device based on any one of the solutions in Embodiments 1 - 3, as Figure 1 - Figure 5 shown. The atomizing device 9 includes an atomizing device body 18, a secondary mixing buffer cavity 19, and an atomizing nozzle 20. The atomizing device body 18, the secondary mixing buffer cavity 19, and the atomizing nozzle 20 are connected in sequence. The outside of the atomizing device body 18 is hermetically connected to the powder collecting tank 11 through an external thread. The middle part of the atomizing device body 18 is hermetically connected to the pipeline for transporting the gas-liquid premixed body of the powder collecting tank 11 through an internal thread, that is, the mixing pipeline 8 in Embodiment 3. And a stable channel 23 is opened in the middle part of the atomizing device body 18. The secondary mixing buffer cavity 19 is provided with a mixing cavity 22. Both ends of the mixing cavity 22 are connected to the stable channel 23 and the atomizing nozzle 20 respectively. In this embodiment, the mixing cavity 22 is a cavity with a gradually expanding cross-section. The large-diameter end of the mixing cavity 22 is connected to the stable channel 23. In this way, after two times of mixing, the atomizing nozzle 20 is fully activated to obtain an ideal atomizing effect.

[0046] Embodiment 5

[0047] Based on the technical solution of Embodiment 4, this Embodiment 5 provides another automatic spraying device. As Figure 1 - Figure 5 shown, to adjust the spraying range of the atomizing nozzle, 3 or 6 or more of the above atomizing devices 9 are provided and evenly distributed around the outlet end of the powder feeding pipe 12. The atomizing devices 20 are all connected through a tee pipe 10.

[0048] In this embodiment, the atomizing nozzle 20 is formed by evenly enclosing a spherical nozzle with multiple triangular thin plates at a certain interval. Specifically, one side line end of the triangular thin plate is connected to the outlet end of the secondary mixing buffer cavity 19 and is evenly distributed along the outlet end of the secondary mixing buffer cavity 19 at a certain interval. In the developed view of the spherical nozzle, it resembles a plum blossom shape. Finally, the tips of all the triangular thin plates converge at one point to form a Figure 5 spherical nozzle as shown.

[0049] At the same time, a buffer block 21 is connected to the top end of the inner cavity of the atomizing nozzle 20. The buffer block 21 is flat. The buffer block 21 can diffuse the mixed liquid of high-pressure gas and additive to the surroundings. Buffer blocks 21 with different areas can make the mixed liquid have different spraying ranges. Therefore, in actual use, the atomizing nozzle 20 containing a buffer block 21 with a different area can be replaced as needed to achieve the purpose of adjusting the spraying range.

[0050] The above specific embodiments have further elaborated on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic spraying device, characterized in that, Including: An additive pipeline (1), wherein the additive pipeline (1) is provided with a peristaltic pump (3) for pressurizing the additive and a blanking valve (6) for adjusting the additive addition ratio; A high-pressure gas pipeline (2), wherein the high-pressure gas pipeline (2) is provided with a solenoid valve (4) for adjusting the blowing time; A powder collecting tank (11), wherein a powder discharging pipeline (12) is provided at the upper part of the powder collecting tank (11), an induction valve (14) is arranged on the powder discharging pipeline (12), and a plurality of atomizing devices (9) are annularly arranged at the outlet end of the powder discharging pipeline (12). Among them, the additive pipeline (1) and the high-pressure gas pipeline (2) are mixed at the intersection of the pipelines to obtain a gas-liquid premixed body, and are atomized by the atomizing devices (9); A controller (5), wherein the blanking valve (6), the solenoid valve (4) and the induction valve (14) are all electrically connected to the controller (5). The on-off time of the solenoid valve (4) and the blanking valve (6) is controlled by the controller (5), and after the induction valve (14) senses the powder discharging signal of the pipeline, it transmits an execution signal to the controller (5).

2. An automatic spraying device according to claim 1, characterized in that, A pressure relief valve (13) is arranged on the powder discharging pipeline (12).

3. An automatic spraying device according to claim 1, characterized in that, An primary mixing buffer cavity (7) is arranged at the intersection of the additive pipeline (1) and the high-pressure gas pipeline (2).

4. An automatic spray device according to claim 3, characterized in that: The additive pipeline (1) includes a first mixing pipeline (15), the high-pressure gas pipeline (2) includes a second mixing pipeline (16), and the primary mixing buffer cavity (7) includes a mixing pipeline (8); The second mixing pipeline (16) is communicated with the mixing pipeline (8) on the same axis, the first mixing pipeline (15) is obliquely communicated with the mixing pipeline (8), and the mixing pipeline (8) is communicated with the atomizing devices (9).

5. An automatic spraying device according to claim 4, characterized in that, Airfoil blocks (17) are arranged at the mixing joints of the first mixing pipeline (15), the second mixing pipeline (16) and the mixing pipeline (8).

6. The automatic spraying device according to claim 5, wherein, The leading edge of the airfoil block (17) faces the outlet end of the first mixing pipeline (15), and the trailing edge of the airfoil block (17) faces the inlet end of the mixing pipeline (8).

7. An automatic spraying device according to claim 1, characterized in that, At least 3 atomizing devices (9) are arranged and are evenly distributed around the outlet end of the powder discharging pipeline (12), and the atomizing devices (9) are all communicated through a tee pipeline (10).

8. An automatic spraying device according to any one of claims 1-7, characterized in that The atomizing device (9) includes an atomizing device body (18), a secondary mixing buffer cavity (19) and an atomizing nozzle (20); The atomizing device body (18), the secondary mixing buffer cavity (19) and the atomizing nozzle (20) are communicated in sequence. The outside of the atomizing device body (18) is hermetically connected to the powder collecting tank (11) through an external thread, and the middle part of the atomizing device body (18) is hermetically connected to the pipeline for transporting the gas-liquid premixed body of the powder collecting tank (11) through an internal thread.

9. An automatic spraying device according to claim 8, wherein, A stable channel (23) is provided in the middle of the atomization device body (18), and a mixing chamber (22) is provided in the secondary mixing and buffering cavity (19). Both ends of the mixing chamber (22) are respectively communicated with the stable channel (23) and the atomization nozzle (20). Among them, the mixing chamber (22) is a cavity with a gradually expanding cross-section, and the large-diameter end of the mixing chamber (22) is communicated with the stable channel (23).

10. An automatic spraying device according to claim 9, wherein, A buffer block (21) is provided at the top of the atomization nozzle (20).

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