A powder coating drying apparatus

Abstract

The utility model relates to drying equipment technical field, concretely is a kind of powder coating drying device, including support, drum, drive mechanism, drying mechanism and air extraction mechanism, drum and drive mechanism are fixedly installed on support, drive mechanism is transmission connection with drum and is used to drive drum rotation around the axis of drum, drying mechanism includes heat conduction plate and oil heater, heat conduction plate is fixedly installed on the inner chamber surface of drum, heat conduction plate is equipped with the heat conduction cavity for storing heat conduction oil, oil heater is fixedly installed in heat conduction cavity and is used to heat heat conduction oil, air extraction mechanism is fixedly installed on support and air inlet is communicated with the inner chamber of drum.The utility model can improve the heat conduction efficiency between powder coating and heat conduction plate by setting heat conduction plate and oil heater, improve the drying efficiency of powder coating, solve the problem that the drying efficiency of powder coating of existing drum-type powder dryer is lower, have good practicality.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, specifically a powder coating drying device. Background Technology

[0002] Powder coatings are solid powdered synthetic resin coatings composed of solid resin, pigments, fillers, and additives. They are broadly classified into thermoplastic and thermosetting types. During the powder coating production process, a drying device is generally required to remove moisture from the powder coating.

[0003] Chinese utility model patent application number CN202223521070.0 discloses a drum-type powder dryer, including a support frame. A heating groove is provided on one inner wall of the support frame, and a heating mesh is fixedly connected to the upper inner wall of the support frame near the heating groove. A combustion disc is provided on the inner wall of the heating groove. In this drum-type powder dryer, during actual use, the material to be dried is placed into the inner drum through the feed inlet, and the heating mechanism located below the outer drum, specifically the combustion disc, heats the inner drum inside the outer drum to dry the powder coating inside.

[0004] However, the heating mechanism of the aforementioned drum-type powder dryer is located below the outer cylinder, and the inner cylinder does not directly contact the heating mechanism. Furthermore, the material to be dried in the inner cylinder is separated from the heating plate by the outer cylinder. This heating structure obviously reduces the heat transfer efficiency and the drying efficiency of the powder coating. Its structure needs to be improved and optimized. Utility Model Content

[0005] To address the low drying efficiency of existing drum-type powder dryers for powder coatings, this invention provides a powder coating sieving device, the specific technical solution of which is as follows:

[0006] A powder coating drying device includes a support, a drum, and a drive mechanism. The drum and the drive mechanism are both fixedly mounted on the support. The drum has an inlet and an outlet. The drive mechanism is connected to the drum and drives the drum to rotate around its axis. The powder coating drying device also includes a drying mechanism and a ventilation mechanism. The drying mechanism includes a heat-conducting plate and an oil heater. The heat-conducting plate is fixedly mounted on the inner surface of the drum and has a heat-conducting cavity for storing heat-conducting oil. The oil heater is fixedly mounted in the heat-conducting cavity and used to heat the heat-conducting oil. The ventilation mechanism is fixedly mounted on the support and its inlet communicates with the inner cavity of the drum.

[0007] The powder coating drying device features a heat-conducting plate inside the drum cavity, with a heat-conducting oil storage chamber within the plate. An oil heater rapidly heats the oil in the chamber, dissipating heat quickly throughout the drum cavity and preventing heat waste, thus accelerating the drying process. Simultaneously, a drive mechanism rotates the drum, preventing powder coating buildup and ensuring even drying by dispersing it during rotation. Furthermore, the heat-conducting plate's placement within the drum cavity allows for direct contact between some powder coating material and the plate during rotation, improving heat transfer efficiency.

[0008] In other words, the powder coating drying device, by setting up a heat-conducting plate and an oil heater, can improve the heat transfer efficiency between the powder coating and the heat-conducting plate, thereby improving the drying efficiency of the powder coating and solving the problem of low drying efficiency of existing drum-type powder dryers. It has great practicality.

[0009] Preferably, the drive mechanism includes a drive motor, a pulley assembly, a reduction gearbox, a first gear, and a second gear. The drive motor is fixedly mounted on the bracket and its output shaft is connected to the reduction gearbox via the pulley assembly. The output shaft of the reduction gearbox is connected to the first gear. The second gear is fixedly mounted on the drum and its axis coincides with the axis of the drum. The second gear meshes with the first gear.

[0010] Preferably, the pulley assembly includes a first pulley, a second pulley, and a belt. The first pulley is fixedly connected to the output shaft of the drive motor, the second pulley is fixedly connected to the input shaft of the gearbox, and the belt is sleeved on the first pulley and the second pulley.

[0011] Preferably, the heat-conducting plate includes two sets of rotating guide plates. Each set of rotating guide plates includes multiple rotating guide plates that are equally spaced along the axial direction of the roller. Each rotating guide plate is provided with the heat-conducting cavity. The two sets of rotating guide plates are arranged opposite to each other.

[0012] Preferably, the exhaust mechanism includes an exhaust fan, an air inlet pipe, and an air outlet pipe. The air inlet of the exhaust fan is connected to the inner cavity of the roller through the air inlet pipe, and the air outlet of the exhaust fan is connected to one end of the air outlet pipe.

[0013] Preferably, the powder coating drying device further includes a flange and a bearing. The flange is fixedly sleeved on the drum, and the bearing is fixedly installed on the bracket. The bearing surface is provided with a rolling groove, and the flange cooperates with the bearing through the rolling groove.

[0014] Preferably, the spiral directions of each group of the spiral guide plates are the same, and the spiral directions of the spiral guide plates in two groups of the spiral guide plates are opposite.

[0015] Preferably, the first pulley is a solid pulley, and the second pulley is a spoked pulley.

[0016] Preferably, the heat-conducting plate is a spiral guide plate, and the heat-conducting cavity is arranged along the spiral direction of the spiral guide plate. Attached Figure Description

[0017] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale; rather, the focus is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0018] Figure 1 This is a schematic diagram of the overall structure of a powder coating drying device according to one embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of a powder coating drying device according to one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the drive mechanism and the exhaust mechanism in one embodiment of the present invention. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the pulley assembly in one embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the drive mechanism and the exhaust mechanism in one embodiment of the present invention. Figure 2 ;

[0023] Figure 6 This is a schematic diagram showing the structural relationship between the drying mechanism and the drum in one embodiment of the present invention.

[0024] In the diagram: 1. Support; 2. Roller; 3. Drive mechanism; 4. Drying mechanism; 5. Exhaust mechanism; 6. Flange; 7. Bearing; 30. Drive motor; 31. Pulley assembly; 32. Gearbox; 33. First gear; 34. Second gear; 40. Heat-conducting plate; 41. Heat-conducting cavity; 50. Exhaust fan; 310. First pulley; 311. Second pulley; 312. Belt. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0029] like Figure 1 as well as Figure 3 As shown, a powder coating drying device according to one embodiment of the present invention includes a support 1, a roller 2 and a drive mechanism 3. The roller 2 and the drive mechanism 3 are both fixedly installed on the support 1. The roller 2 is provided with an inlet and an outlet. The drive mechanism 3 is connected to the roller 2 and is used to drive the roller 2 to rotate around the axis of the roller 2.

[0030] For example, the inlet and outlet can be opened on the circumferential surface of the roller 2. The drive mechanism 3 includes a drive motor 30, a pulley assembly 31, a reduction gearbox 32, a first gear 33, and a second gear 34. The drive motor 30 is fixedly mounted on the bracket 1 and its output shaft is connected to the reduction gearbox 32 through the pulley assembly 31. The output shaft of the reduction gearbox 32 is connected to the first gear 33. The second gear 34 is fixedly mounted on the roller 2 and its axis coincides with the axis of the roller 2. The second gear 34 meshes with the first gear 33.

[0031] like Figure 1 , Figure 3 , Figure 4 as well as Figure 5As shown, the pulley assembly 31 includes a first pulley 310, a second pulley 311, and a belt 312. The first pulley 310 is fixedly connected to the output shaft of the drive motor 30, and the second pulley 311 is fixedly connected to the input shaft of the reduction gearbox 32. The belt 312 is sleeved on the first pulley 310 and the second pulley 311. Specifically, the first pulley 310 is a solid pulley, the second pulley 311 is a spoked pulley, and the diameter of the first pulley 310 is smaller than the diameter of the second pulley 311.

[0032] like Figure 2 As shown, the second gear 34 meshes with the first gear 33, and the diameter of the first gear 33 is smaller than the diameter of the second gear 34. The roller 2 is cylindrical, and the second gear 34 is fixedly mounted on one side of the roller 2.

[0033] like Figure 2 as well as Figure 6 As shown, the powder coating drying device further includes a drying mechanism 4 and an exhaust mechanism 5. The drying mechanism 4 includes a heat-conducting plate 40 and an oil heater. The heat-conducting plate 40 is fixedly installed on the inner surface of the drum 2. The heat-conducting plate 40 is provided with a heat-conducting cavity 41 for storing heat-conducting oil. The oil heater (not shown in the figure) is fixedly installed in the heat-conducting cavity 41 and is used to heat the heat-conducting oil. The exhaust mechanism 5 is fixedly installed on the bracket 1 and its air inlet is connected to the inner cavity of the drum 2.

[0034] Specifically, the oil heater can be an electric heating wire inserted into the heat-conducting oil in the heat-conducting cavity 41, and its power supply can be fixedly installed on the surface of the drum. The heat-conducting oil can be silicone oil, L-QB300 heat-conducting oil, or L-QC320 heat-conducting oil, etc. To ensure that the heat-conducting cavity 41 will not crack, the sidewall thickness of the heat-conducting cavity 41 can be minimized, for example, designed to be 1 mm or 2 mm. The heat-conducting plate 40 is made of a metal with good thermal conductivity, such as copper, aluminum, or aluminum alloy, so that when the oil heater is working, it can quickly conduct heat through the heat-conducting oil, thereby rapidly heating the heat-conducting plate 40 and improving the heat transfer efficiency between the heat-conducting plate 40 and the powder coating.

[0035] Preferably, the surface of the heat-conducting plate 40 is wavy to increase its surface area, thereby increasing the heat dissipation area of ​​the heat-conducting plate 40 so that it can come into contact with more powder coating and accelerate the overall drying speed of the powder coating.

[0036] The exhaust mechanism 5 includes an exhaust fan 50, an inlet pipe, and an outlet pipe. The exhaust fan 50 is fixedly mounted on the bracket 1 via a support frame. The air inlet of the exhaust fan 50 is connected to the inner cavity of the drum 2 through the inlet pipe, and the air outlet of the exhaust fan 50 is connected to one end of the outlet pipe. To prevent powder coating from being dispersed into the air during the mixing process and polluting the environment, staggered filter screens can be installed on the inner wall of the inlet pipe. These filter screens adsorb the powder coating, thus filtering and purifying the powder coating in the hot air drawn from the drum. Alternatively, a filter unit such as a filter sponge can also be installed at the air inlet of the exhaust fan 50.

[0037] During the powder coating drying process, the hot air drawn out by the exhaust fan 50 from the inner cavity of the drum 2 has a certain temperature and is generally higher than the room temperature. In order to improve the heat utilization efficiency, the other end of the air outlet pipe, i.e., the air outlet, can be positioned directly opposite the drum surface to heat the drum with hot air.

[0038] like Figure 1 As shown, the powder coating drying device also includes a flange 6 and a bearing 7. The flange 6 is fixedly sleeved on the roller 2, and the bearing 7 is fixedly installed on the bracket 1. The surface of the bearing 7 is provided with a rolling groove, and the flange 6 works in cooperation with the bearing 7 through the rolling groove.

[0039] In summary, the powder coating drying device, by setting a heat-conducting plate 40 inside the drum 2 and a heat-conducting cavity 41 for storing heat-conducting oil within the heat-conducting plate 40, allows the heat-conducting oil in the heat-conducting cavity 41 to be rapidly heated by an oil heater, enabling heat to be quickly dissipated within the drum 2, avoiding heat waste and thus accelerating the drying speed of the powder coating. Simultaneously, by setting a drive device to drive the drum 2 to rotate, the accumulation of powder coating inside the drum 2 can be prevented, allowing the powder coating to be dispersed during the rolling process and achieving uniform drying. Furthermore, since the heat-conducting plate 40 is located inside the drum 2, during the rotation of the drum 2, some powder coating directly contacts the heat-conducting plate 40, which also improves the heat transfer efficiency between the heat-conducting plate 40 and the powder coating.

[0040] In other words, the powder coating drying device, by setting up a heat-conducting plate 40 and an oil heater, can improve the heat transfer efficiency between the powder coating and the heat-conducting plate 40, thereby improving the drying efficiency of the powder coating and solving the problem of low drying efficiency of existing drum-type powder dryers. It has great practicality.

[0041] As a preferred technical solution, such as Figure 2As shown, the heat-conducting plate 40 includes two sets of rotating guide plates. Each set of rotating guide plates includes multiple rotating guide plates that are equally spaced along the axial direction of the roller 2. Each rotating guide plate is provided with the heat-conducting cavity 41. The two sets of rotating guide plates are arranged opposite to each other.

[0042] The spiral directions of each set of guide vanes are the same, while the spiral directions of the guide vanes in two sets of sets are opposite. Thus, by using guide vanes in two sets with opposite spiral directions, the powder coating can be prevented from accumulating in one direction during the rotation of the drum 2, allowing the powder coating to be stirred more evenly, thereby ensuring uniform heating of the powder coating and improving drying efficiency.

[0043] Of course, the heat-conducting plate 40 can also be a spiral guide plate, and the heat-conducting cavity 41 is arranged along the spiral direction of the spiral guide plate. In this case, the roller 2 can be driven to rotate in both directions by the forward and reverse rotation of the drive motor 30, thereby realizing the stirring and drying of the powder coating.

[0044] 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.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A powder coating drying device, comprising a support, a roller, and a drive mechanism, wherein the roller and the drive mechanism are both fixedly mounted on the support, the roller is provided with an inlet and an outlet, and the drive mechanism is drivenly connected to the roller and is used to drive the roller to rotate around the axis of the roller, characterized in that, The powder coating drying device further includes a drying mechanism and a ventilation mechanism. The drying mechanism includes a heat-conducting plate and an oil heater. The heat-conducting plate is fixedly installed on the inner surface of the drum. The heat-conducting plate is provided with a heat-conducting cavity for storing heat-conducting oil. The oil heater is fixedly installed in the heat-conducting cavity and is used to heat the heat-conducting oil. The ventilation mechanism is fixedly installed on the bracket and its air inlet is connected to the inner cavity of the drum.

2. The powder coating drying apparatus as described in claim 1, characterized in that, The drive mechanism includes a drive motor, a pulley assembly, a reduction gearbox, a first gear, and a second gear. The drive motor is fixedly mounted on the bracket and its output shaft is connected to the reduction gearbox via the pulley assembly. The output shaft of the reduction gearbox is connected to the first gear. The second gear is fixedly mounted on the drum and its axis coincides with the axis of the drum. The second gear meshes with the first gear.

3. The powder coating drying apparatus as described in claim 2, characterized in that, The pulley assembly includes a first pulley, a second pulley, and a belt. The first pulley is fixedly connected to the output shaft of the drive motor, the second pulley is fixedly connected to the input shaft of the gearbox, and the belt is sleeved on the first pulley and the second pulley.

4. The powder coating drying apparatus as described in claim 3, characterized in that, The heat-conducting plate includes two sets of rotating guide plates. Each set of rotating guide plates includes multiple rotating guide plates that are equally spaced along the axial direction of the roller. Each rotating guide plate is provided with the heat-conducting cavity. The two sets of rotating guide plates are arranged opposite to each other.

5. A powder coating drying apparatus as described in claim 4, characterized in that, The exhaust mechanism includes an exhaust fan, an air inlet pipe, and an air outlet pipe. The air inlet of the exhaust fan is connected to the inner cavity of the roller through the air inlet pipe, and the air outlet of the exhaust fan is connected to one end of the air outlet pipe.

6. A powder coating drying apparatus as described in claim 5, characterized in that, The powder coating drying device also includes a flange and a bearing. The flange is fixedly sleeved on the roller, and the bearing is fixedly installed on the bracket. The bearing surface is provided with a rolling groove, and the flange works in cooperation with the bearing through the rolling groove.

7. A powder coating drying apparatus as described in claim 6, characterized in that, The spiral directions of each group of spiral guide plates are the same, and the spiral directions of the spiral guide plates in two groups of spiral guide plates are opposite.

8. A powder coating drying apparatus as described in claim 7, characterized in that, The first pulley is a solid pulley, and the second pulley is a spoked pulley.

9. A powder coating drying apparatus as described in claim 1, characterized in that, The heat-conducting plate is a spiral guide plate, and the heat-conducting cavity is arranged along the spiral direction of the spiral guide plate.

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