Powder coating apparatus

Abstract

This application relates to a powder coating device. The powder coating device includes a fluidizing mechanism, a gas distribution mechanism, an inlet pipe, and a discharge device. The fluidizing mechanism has a fluidizing chamber. The gas distribution mechanism has a gas distribution chamber and is located within the fluidizing mechanism. A gas chamber is formed between the gas distribution mechanism and the fluidizing mechanism. The gas distribution mechanism has ventilation holes that connect the gas chamber and the gas distribution cavity. The inlet pipe communicates with the gas chamber. The discharge device is connected to the fluidizing mechanism and has a discharge port that communicates with the gas distribution cavity. In this application, the gas distribution mechanism is located inside the fluidizing mechanism, and the discharge device is located at one end of the fluidizing mechanism, allowing the fluidized powder to flow out from the discharge device. Compared to a scheme where the discharge device and the gas distribution mechanism share the same area, separating the discharge device from the gas distribution mechanism allows the ventilation holes on the gas distribution mechanism to not restrict the discharge area, thereby improving the discharge efficiency of the discharge device.

Description

Technical Field

[0001] This application relates to the field of fluidized bed technology, and in particular to a powder coating device. Background Technology

[0002] Surface functionalization of powder particles is an important component of materials surface engineering technology, especially significant for improving the original properties of particles. Surface functionalization of powder particles can be achieved by coating the surface with a layer. Therefore, powder coating is one of the crucial steps in powder functionalization and surface modification.

[0003] Currently, there are many types of powder coating equipment, such as fluidized beds, spray dryers, and spray beds. Generally, in a powder fluidized bed, the gas can be uniformly fluidized in the chamber through the ventilation holes on the gas distribution mechanism. However, since the ventilation holes on the gas distribution mechanism limit the area of ​​the discharge device, it leads to low discharge efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a powder coating device that can improve powder discharge efficiency to address the above problems.

[0005] A powder coating device, comprising:

[0006] Fluidization mechanism, wherein the fluidization mechanism is provided with a fluidization chamber;

[0007] A gas distribution mechanism is provided, the gas distribution mechanism is provided in a gas distribution chamber, the gas distribution mechanism is disposed within the fluidization mechanism; a gas chamber is formed between the gas distribution mechanism and the fluidization mechanism; the gas distribution mechanism is also provided with a ventilation hole, the ventilation hole connecting the gas chamber and the gas distribution chamber;

[0008] An air intake pipe, which is connected to the air chamber;

[0009] A discharge device is connected to the fluidizing mechanism, and the discharge device is provided with a discharge port that communicates with the gas distribution chamber.

[0010] The technical solution will be further explained below:

[0011] In one embodiment, the gas distribution mechanism includes a first sidewall, a first end plate, and a second end plate. The first end plate is connected to the end of the first sidewall facing the discharge device. The second end plate is connected to the end of the first sidewall facing away from the discharge device. Both the first end plate and the second end plate are connected to the fluidizing mechanism. The fluidizing mechanism, the first sidewall, the first end plate, and the second end plate together enclose the gas chamber.

[0012] In one embodiment, the first end plate is provided with an air inlet, and one end of the air inlet pipe passes through the air inlet and is disposed in the air chamber.

[0013] In one embodiment, there are multiple ventilation holes, which are arranged circumferentially along the gas distribution mechanism to form a ventilation hole layer. Multiple ventilation hole layers are spaced apart along the direction from one end of the gas distribution mechanism near the discharge port to the other end; the ventilation holes in two adjacent ventilation hole layers are arranged alternately.

[0014] In one embodiment, the diameter of the ventilation holes in each ventilation hole layer increases sequentially along the direction from one end of the gas distribution mechanism near the outlet to the other.

[0015] In one embodiment, the powder coating device further includes a wind cap located inside the gas distribution chamber and connected to the ventilation hole. The wind cap has multiple air distribution holes, all of which are connected to the ventilation hole.

[0016] In one embodiment, the plurality of air distribution holes are arranged in an alternating pattern, and the openings of the plurality of air distribution holes all face the discharge device.

[0017] In one embodiment, the discharge device includes:

[0018] A connector, one end of which is connected to the fluidizing mechanism; the connector is provided with a connecting channel communicating with the gas distribution chamber;

[0019] A discharge component is connected to the end of the connecting component away from the fluidizing mechanism; a discharge port is located inside the discharge component and communicates with the connecting channel to form a discharge channel; and

[0020] A control component is connected between the connector and the discharge component, and the control component is used to open or close the discharge channel.

[0021] In one embodiment, the powder coating equipment further includes a reaction mechanism, which has a reaction chamber. One end of the reaction mechanism is connected to the end of the fluidizing mechanism away from the discharge device, and the reaction chamber is in communication with the gas distribution chamber.

[0022] In one embodiment, the powder coating device further includes an ultrasonic rod flange connected to the reaction mechanism, the ultrasonic rod flange being used to generate a sound field within the reaction chamber.

[0023] In the aforementioned powder coating equipment, the gas distribution mechanism is located inside the fluidization mechanism, creating a gas chamber between them. This allows gas supplied to the gas chamber via the inlet pipe to enter the gas distribution chamber through ventilation holes, thus fluidizing the powder. The fluidized powder can then flow out from a discharge device located at one end of the fluidization mechanism. Compared to conventional designs where the discharge device and gas distribution mechanism share the same area, this application separates the discharge device from the gas distribution mechanism. This ensures that the ventilation holes on the gas distribution mechanism do not restrict the discharge area of ​​the discharge device, thereby improving its discharge efficiency. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0027] Figure 1 This is a partial cross-sectional view of the powder coating equipment in the embodiments of this application.

[0028] Figure 2 This is a schematic diagram of the gas distribution mechanism.

[0029] Figure 3 This is a schematic diagram of the windproof cap.

[0030] Figure 4 This is a diagram showing the gas flow velocity distribution inside the powder coating equipment when the air holes in the vent cap are arranged in a triangular pattern.

[0031] Figure 5 This is a diagram showing the gas flow velocity distribution inside the powder coating equipment when the air holes in the air cap are arranged in a conventional manner.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Powder coating equipment; 1. Reaction mechanism; 1a. Reaction chamber; 2. Ultrasonic rod flange; 3. Fluidization mechanism; 3a. Fluidization chamber; 31. Second side wall; 4. Gas chamber; 5. Gas distribution mechanism; 5a. Ventilation hole; 5b. Gas distribution chamber; 51. First end plate; 51a. Air inlet; 52. First side wall; 53. Second end plate; 6. Air inlet pipe; 7. Discharge device; 7a. Discharge channel; 71. Connecting part; 71a. Connecting channel; 72. Control part; 73. Discharge part; 73a. Discharge port; 8. Air cap; 8a. Air distribution hole; 8b. Air guide channel; 81. Connecting part; 82. Air distribution part. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0040] See Figure 1 , Figure 1 This diagram shows a partial cross-sectional view of a powder coating device 100 according to an embodiment of this application. The powder coating device 100 provided in this embodiment includes a fluidization mechanism 3, a gas distribution mechanism 5, an air inlet pipe 6, and a discharge device 7. Wherein:

[0041] Combination Figure 1 and Figure 2 As shown, Figure 2This is a schematic diagram of the gas distribution mechanism 5. The fluidizing mechanism 3 has a fluidizing chamber 3a. The gas distribution mechanism 5 has a gas distribution chamber 5b and is located within the fluidizing mechanism 3. A gas chamber 4 is formed between the gas distribution mechanism 5 and the fluidizing mechanism 3. The gas distribution mechanism 5 also has a ventilation hole 5a, which connects the gas chamber 4 and the gas distribution chamber 5b. The inlet pipe 6 is connected to the gas chamber 4. The discharge device 7 is connected to the fluidizing mechanism 3 and has a discharge port 73a that communicates with the gas distribution chamber 5b.

[0042] Combination Figure 1 and Figure 2 As shown, it can be understood that one end of the air inlet pipe 6 can be connected to the air chamber 4, and the other end can be connected to the air source device (not shown), so that the air inlet pipe 6 can transport the gas in the air source device to the air chamber 4. Then, the gas can enter the gas distribution chamber 5b through the ventilation hole 5a on the gas distribution mechanism 5. After entering the gas distribution chamber 5b, the gas can blow up the powder located inside the powder coating equipment 100, thereby achieving powder fluidization. The type of gas transported by the air source device and the air inlet pipe 6 can be designed according to product needs; for example, the air source device can be a nitrogen generator, and the gas transported by the air inlet pipe 6 can be nitrogen.

[0043] In this powder coating equipment 100, the gas distribution mechanism 5 is located inside the fluidization mechanism 3, so that a gas chamber 4 can be formed between the gas distribution mechanism 5 and the fluidization mechanism 3. This allows the gas supplied to the gas chamber 4 by the inlet pipe 6 to enter the gas distribution chamber 5b through the ventilation hole 5a, thereby fluidizing the powder. Subsequently, the fluidized powder can flow out from the discharge device 7 located at one end of the fluidization mechanism 3. Compared with the conventional scheme where the discharge device 7 and the gas distribution mechanism 5 share the same area, this application separates the discharge device 7 from the gas distribution mechanism 5. This ensures that the ventilation hole 5a on the gas distribution mechanism 5 does not restrict the discharge area of ​​the discharge device 7, thereby improving the discharge efficiency of the discharge device 7.

[0044] In one embodiment, combined Figure 1 and Figure 2 As shown, the gas distribution mechanism 5 includes a first sidewall 52, a first end plate 51, and a second end plate 53. The first end plate 51 is connected to the end of the first sidewall 52 facing the discharge device 7. The second end plate 53 is connected to the end of the first sidewall 52 facing away from the discharge device 7. Both the first end plate 51 and the second end plate 53 are connected to the fluidizing mechanism 3. The fluidizing mechanism 3, the first sidewall 52, the first end plate 51, and the second end plate 53 together enclose and form a gas chamber 4.

[0045] like Figure 1 and Figure 2As shown, the fluidization mechanism 3 may include a second sidewall 31, which is located on the outer periphery of the gas distribution mechanism 5. The first sidewall 52 in the gas distribution mechanism 5 and the second sidewall 31 in the fluidization mechanism 3 are arranged at intervals. The first end plate 51 and the second end plate 53 in the gas distribution mechanism 5 are both connected to the first sidewall 52 in the fluidization mechanism 3, so that the first sidewall 52, the first end plate 51, the second end plate 53, and the second sidewall 31 can together enclose and form a gas chamber 4. Gas entering through the inlet pipe 6 can flow within the gas chamber 4 between the fluidization mechanism 3 and the gas distribution mechanism 5 to fill the gas chamber 4. Furthermore, the gas in the gas chamber 4 can enter the gas distribution cavity 5b at a certain speed through the ventilation hole 5a, thereby allowing the gas entering the gas distribution cavity 5b to blow up the powder within the powder coating device 100, thus achieving powder fluidization.

[0046] In one embodiment, combined Figure 1 and Figure 2 As shown, the first end plate 51 is provided with an air inlet 51a, and one end of the air inlet pipe 6 passes through the air inlet 51a and is located in the air chamber 4. One end of the air inlet pipe 6 passes through the air inlet 51a on the first end plate 51 and enters the air chamber 4, so that the air inlet pipe 6 can directly deliver gas to the air chamber 4.

[0047] Optionally, the number of intake pipes 6 and intake ports 51a can be designed as needed, for example, one, two, three or more.

[0048] In other embodiments, the position of the air inlet 51a can also be designed as needed, as long as the air inlet 51a allows one end of the air intake pipe 6 to pass through and be disposed in the air chamber 4 so that the air intake pipe 6 can deliver gas to the air chamber 4. For example, the air inlet 51a can be disposed on the second side wall 31 of the fluidizing mechanism 3, or the air inlet 51a can be disposed on the second end plate 53.

[0049] In one embodiment, such as Figure 2 As shown, there are multiple ventilation holes 5a, which are arranged circumferentially along the gas distribution mechanism 5 to form a ventilation hole layer. Multiple ventilation hole layers are spaced apart along the direction from one end of the gas distribution mechanism 5 near the discharge port 73a to the other end. The ventilation holes 5a in adjacent ventilation hole layers are arranged alternately.

[0050] Combination Figure 1 and Figure 2As shown, multiple ventilation holes 5a can be arranged at intervals along the circumference of the first sidewall 52 to form a ventilation hole layer. Multiple ventilation hole layers can be arranged at intervals on the first sidewall 52, and the ventilation holes 5a in adjacent ventilation hole layers are staggered. This ensures that when gas enters the gas distribution cavity 5b from the gas chamber 4 through the ventilation holes 5a, the airflow of each ventilation hole 5a will not interfere with the gas flowing out of the adjacent ventilation holes 5a, thereby reducing the instability of the airflow in the gas distribution cavity 5b and improving the uniformity of powder fluidization.

[0051] In one embodiment, such as Figure 2 As shown, along the direction from one end of the gas distribution mechanism 5 near the outlet 73a to the other end, the diameter of the ventilation holes 5a in each ventilation hole layer increases sequentially.

[0052] Combination Figure 1 and Figure 2 As shown, along the direction from one end of the gas distribution mechanism 5 near the outlet 73a to the other, the diameters of the ventilation holes 5a in each ventilation hole layer arranged on the first sidewall 52 increase sequentially. A larger diameter ventilation hole 5a results in lower air resistance when gas passes through it, which is more conducive to gas distribution into the gas distribution chamber 5b. Therefore, along the direction from one end of the gas distribution mechanism 5 near the outlet 73a to the other, the air resistance of the ventilation holes 5a in each ventilation hole layer arranged on the first sidewall 52 decreases sequentially.

[0053] During the fluidization process, a vacuum pump (not shown) needs to be installed on the side of the fluidization mechanism 3 away from the discharge device 7 to ensure the fluidization effect. The vacuum pump is used to generate a vacuum negative pressure in the powder coating equipment 100 so that the airflow inside the powder coating equipment 100 can flow from the end where the discharge device 7 is located to the end where the vacuum pump is located. Therefore, the vacuum pump can create a vacuum negative pressure in the gas distribution chamber 5b. This allows the gas in the gas chamber 4 to enter the gas distribution chamber 5b at a higher speed from the ventilation hole 5a near the air inlet pipe 6, even when the ventilation hole 5a has the same aperture. This is not conducive to ensuring the uniformity of the airflow in the gas distribution chamber 5b, thus affecting the uniform fluidization of the powder. In this embodiment, by changing the aperture size of the ventilation hole 5a according to the distance between the ventilation hole 5a and the air inlet pipe 6, the speed of the gas passing through each ventilation hole 5a can be ensured by changing the wind resistance of the ventilation hole 5a. This ensures the uniformity of the airflow in the gas distribution chamber 5b and the uniform fluidization of the powder, thereby ensuring the fluidization effect.

[0054] In other embodiments, the aperture size of the ventilation hole 5a can also be designed according to the distance between the ventilation hole 5a and the air inlet pipe 6 that supplies gas to the air chamber 4. For example, when the air inlet pipe 6 enters the air chamber 4 from the second end plate 53, the aperture size of the ventilation holes 5a in each ventilation hole layer can be successively reduced along the direction from one end of the gas distribution mechanism 5 near the discharge port 73a to the other end.

[0055] In one embodiment, combined Figure 1 , Figure 2 and Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the air cap 8. The powder coating equipment 100 also includes an air cap 8, which is located in the gas distribution chamber 5b and connected to the ventilation hole 5a. The air cap 8 is provided with multiple air distribution holes 8a, all of which are connected to the ventilation hole 5a.

[0056] Combination Figure 1 , Figure 2 and Figure 3 As shown, the wind cap 8 is disposed within the gas distribution chamber 5b. The wind cap 8 may include a connecting part 81 and a wind distribution part 82 connected together. The connecting part 81 can be connected to a ventilation hole 5a. For example, the connecting part 81 may have threads, and a nut may be provided inside the ventilation hole 5a. When the threads and the nut are engaged, the connecting part 81 can be connected to the gas distribution mechanism 5. The wind distribution part 82 has multiple wind distribution holes 8a. A guide channel 8b connecting the ventilation hole 5a and the wind distribution hole 8a is provided in the wind distribution part 82 and the connecting part 81, so that the gas in the air chamber 4 can flow out from the wind distribution holes 8a in the wind cap 8 to the gas distribution chamber 5b.

[0057] like Figure 1 As shown, the multiple air caps 8 located in the gas distribution cavity 5b are staggered with each other, which makes the gas flowing out of each air cap 8 less affected by the gas flowing out of other air caps 8, thus helping to ensure the uniformity of airflow in the gas distribution cavity 8b and ensuring the powder fluidization effect.

[0058] In one embodiment, such as Figure 3 As shown, multiple air distribution holes 8a are arranged in an alternating pattern, and the openings of multiple air distribution holes 8a all face the discharge device 7.

[0059] Combination Figure 1 and Figure 3As shown, the openings of the multiple air distribution holes 8a on the air cap 8 all face the discharge device 7. On the one hand, this prevents the powder from clogging the air distribution holes 8a when it enters the gas distribution chamber 5b from the end of the fluidizing mechanism 3 away from the discharge device 7, thus avoiding affecting the fluidization effect. On the other hand, the opening direction of the air distribution holes 8a facing the side where the discharge device 7 is located allows the airflow from the air distribution holes 8a to flow towards the side of the discharge device 7 first, blowing up the powder between the air cap 8 and the discharge device 7. This allows the blown powder to flow towards the end of the fluidizing mechanism 3 away from the discharge device 7 under the suction of the vacuum pump in the powder coating equipment 100, thereby ensuring the fluidization effect. The staggered arrangement of the multiple air distribution holes 8a in the air cap 8 allows the airflow inside the powder coating equipment 100 to more quickly return to a stable and uniform distribution state when passing through the air cap 8.

[0060] Optional, combined Figure 1 and Figure 3 As shown, the multiple air distribution holes 8a in the air cap 8 can be arranged in a triangular pattern. This triangular arrangement of the air distribution holes 8a allows the powder to achieve a stable and uniform distribution over a shorter distance when it undergoes a fluidization reaction inside the powder coating equipment 100. Furthermore, the triangular arrangement of the air distribution holes 8a can reduce the peak fluctuations of the airflow inside the powder coating equipment 100.

[0061] In one embodiment, such as Figure 1 As shown, the discharge device 7 includes a connecting member 71, a discharge member 73, and a control member 72. Wherein:

[0062] like Figure 1 As shown, one end of the connector 71 is connected to the fluidizing mechanism 3. The connector 71 has a connecting channel 71a that communicates with the gas distribution chamber 5b. The discharge member 73 is connected to the end of the connector 71 furthest from the fluidizing mechanism 3. A discharge port 73a is located on the discharge member 73 and communicates with the connecting channel 71a to form a discharge channel 7a. A control member 72 is connected between the connector 71 and the discharge member 73, and is used to open or close the discharge channel 7a.

[0063] like Figure 1 As shown, one end of the connector 71 is connected to the fluidization mechanism 3, and the other end is connected to the discharge member 73. The connecting channel 71a provided in the connector 71 can communicate with the gas distribution chamber 5b. The discharge member 73 is connected to the other end of the connector 71, and the discharge port 73a on the discharge member 73 can communicate with the connecting channel 71a to form a discharge channel 7a together with the connecting channel 71a. The discharge channel 7a can communicate with the gas distribution chamber 5b, which allows the powder to flow out from the discharge port 73a after fluidization.

[0064] like Figure 1As shown, the control component 72 is located between the connecting component 71 and the discharge component 73. The control component 72 can control the flow of fluidized powder from the powder coating equipment 100 by closing or opening the discharge channel 7a.

[0065] Optionally, the control component 72 can be a butterfly valve. Compared with manual discharge structures such as gear and rack, the butterfly valve has the advantages of simple structure, easy maintenance, no need for lubrication, larger discharge area, rapid discharge in a short time, and higher overall automation level of the device.

[0066] In one embodiment, such as Figure 1 As shown, the powder coating equipment 100 also includes a reaction mechanism 1, which has a reaction chamber 1a. One end of the reaction mechanism 1 is connected to the end of the fluidizing mechanism 3 away from the discharge device 7, and the reaction chamber 1a is connected to the gas distribution chamber 5b.

[0067] like Figure 1 As shown, the reaction mechanism 1 is located at the end of the fluidization mechanism 3 opposite to the discharge device 7, and the reaction chamber 1a can be connected to the gas distribution chamber 5b. During the fluidization reaction, the powder can flow in the powder coating equipment 100. When the powder expands, it can enter the reaction chamber 1a to ensure the safety of powder fluidization and the reliability of the fluidization reaction. For ease of explanation, the connected reaction chamber 1a, gas distribution chamber 5b, and connecting channel 71a are defined below as the reaction cavity of the powder coating equipment 100.

[0068] like Figure 1 As shown, the end of the reaction mechanism 1 furthest from the fluidization mechanism 3 can be connected to a vacuum pump (not shown). When the fluidization reaction begins, the powder located between the air cap 8 and the control component 72, which is closest to the discharge port 73a, is blown up by the gas blown out by the air cap 8. Under the suction of the vacuum pump, the powder can flow towards the side where the vacuum pump is located, so that the powder can flow in the reaction cavity to ensure the fluidization effect.

[0069] Please see Figure 4 and Figure 5 As shown, Figure 4 This is a diagram showing the gas flow velocity distribution inside the powder coating equipment 100 when the air distribution holes 8a in the air cap 8 are arranged in a triangular pattern. Figure 5 This is a diagram showing the gas flow velocity distribution inside the powder coating equipment 100 when the air distribution holes 8a in the air cap 8 are arranged in a conventional manner. In the diagram, the bottom surface of the horizontal axis refers to the end of the connecting channel 71a near the control component 72, the horizontal axis represents the distance from a point in the reaction cavity to the bottom surface, and the vertical axis represents the gas flow velocity in the reaction cavity. Figure 5 The arrangement of the air distribution holes 8a can be that multiple air distribution holes 8a are arranged in a semi-circular pattern on the outer periphery of the wind cap 8.

[0070] Depend on Figure 4 It can be seen that when the air distribution holes are arranged in a triangular pattern (8a), the gas flow velocity in the reaction cavity reaches a stable state approximately 0.2m above the bottom surface. Furthermore, the airflow in the reaction cavity reaches a stable state after passing through two airflow peak regions. Figure 5 It can be seen that when the air distribution holes 8a are conventionally arranged, the gas flow velocity in the reaction cavity reaches a stable state at approximately 0.5m from the bottom surface. Furthermore, the airflow within the reaction cavity needs to pass through three airflow peak regions to reach a stable state. Therefore, compared to the conventionally arranged air distribution holes 8a, the triangular arrangement of the air distribution holes 8a allows the fluid powder within the reaction cavity to achieve a stable and uniform distribution over a shorter distance. Moreover, the triangular arrangement of the air distribution holes 8a can reduce the peak fluctuations of the airflow within the reaction cavity.

[0071] In one embodiment, such as Figure 1 As shown, the powder coating equipment 100 also includes an ultrasonic rod flange 2, which is connected to the reaction mechanism 1. The ultrasonic rod flange 2 is used to generate a sound field in the reaction chamber 1a.

[0072] like Figure 1 As shown, the ultrasonic rod flange 2 is located on the outer periphery of the reaction mechanism 1 and is connected to the reaction mechanism 1. This allows the ultrasonic rod flange 2 to introduce the sound field into the reaction chamber 1a, so that the powder entering from the feed port (not shown) on the reaction mechanism 1 can be dispersed under the action of the sound field, thereby improving the powder fluidization effect.

[0073] Optionally, the number of ultrasonic bar flanges 2 can be designed as needed, for example, one, two, three or more can be set.

[0074] In one embodiment, the powder coating equipment 100 may further include a temperature detection mechanism (not shown), which may be connected to the reaction mechanism 1 to detect or monitor temperature changes in the powder coating equipment 100, thereby preventing excessively high or low temperatures from affecting the powder fluidization effect.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A powder coating device, characterized in that, include: Fluidization mechanism, wherein the fluidization mechanism is provided with a fluidization chamber; A gas distribution mechanism is provided, the gas distribution mechanism is provided in a gas distribution chamber, the gas distribution mechanism is disposed within the fluidization mechanism; a gas chamber is formed between the gas distribution mechanism and the fluidization mechanism; the gas distribution mechanism is also provided with a ventilation hole, the ventilation hole connecting the gas chamber and the gas distribution chamber; An air intake pipe, which is connected to the air chamber; A discharge device is connected to the fluidization mechanism, and the discharge device is provided with a discharge port that communicates with the gas distribution chamber; A wind cap is located inside the gas distribution chamber and is connected to the ventilation hole. The wind cap has multiple air distribution holes, all of which are connected to the ventilation hole. The multiple air distribution holes in the wind cap are arranged in a triangular pattern.

2. The powder coating equipment according to claim 1, characterized in that, The gas distribution mechanism includes a first sidewall, a first end plate, and a second end plate. The first end plate is connected to the end of the first sidewall facing the discharge device. The second end plate is connected to the end of the first sidewall facing away from the discharge device. Both the first end plate and the second end plate are connected to the fluidization mechanism. The fluidization mechanism, the first sidewall, the first end plate, and the second end plate together enclose the gas chamber.

3. The powder coating equipment according to claim 2, characterized in that, The first end plate is provided with an air inlet, and one end of the air inlet pipe passes through the air inlet and is located in the air chamber.

4. The powder coating equipment according to claim 1, characterized in that, The number of ventilation holes is multiple, and the multiple ventilation holes are arranged circumferentially along the gas distribution mechanism to form a ventilation hole layer. Multiple ventilation hole layers are spaced apart along the direction from one end of the gas distribution mechanism near the discharge port to the other end. The ventilation holes in two adjacent ventilation hole layers are arranged alternately.

5. The powder coating equipment according to claim 4, characterized in that, Along the direction from one end of the gas distribution mechanism near the outlet to the other end, the diameter of the ventilation holes in each ventilation hole layer increases sequentially.

6. The powder coating equipment according to claim 1, characterized in that, The openings of all the multiple air distribution holes face the discharge device.

7. The powder coating equipment according to claim 1, characterized in that, The discharge device includes: A connector, one end of which is connected to the fluidizing mechanism; the connector is provided with a connection channel communicating with the gas distribution chamber; A discharge component is connected to the end of the connecting component away from the fluidizing mechanism; a discharge port is located inside the discharge component and communicates with the connecting channel to form a discharge channel; and A control component is connected between the connector and the discharge component, and the control component is used to open or close the discharge channel.

8. The powder coating equipment according to any one of claims 1 to 7, characterized in that, The powder coating equipment also includes a reaction mechanism, which has a reaction chamber. One end of the reaction mechanism is connected to the end of the fluidizing mechanism away from the discharge device, and the reaction chamber is in communication with the gas distribution chamber.

9. The powder coating equipment according to claim 8, characterized in that, The end of the reaction mechanism furthest from the fluidization mechanism is connected to a vacuum pump.

10. The powder coating equipment according to claim 8, characterized in that, The powder coating equipment also includes an ultrasonic rod flange, which is connected to the reaction mechanism and is used to generate a sound field in the reaction chamber.

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