Curing oven for coating production line

Abstract

The utility model discloses a curing oven for a coating production line, the coating production line comprises a conveying device suitable for conveying workpieces, the conveying device comprises a conveying track arranged in the curing oven, and the curing oven comprises an oven body with a baking chamber; the multiple heat radiation pipelines are laid in the baking chamber, each heat radiation pipeline extends in the first direction, and the multiple heat radiation pipelines are arranged in the second direction different from the first direction; each heat radiation pipeline comprises an air supply pipeline, an air return pipeline stacked on the air supply pipeline, and a connecting pipeline connected between the air supply pipeline and the air return pipeline end to end; and the hot air generating device is constructed to be suitable for generating hot air, and the hot air generating device, the air supply pipelines of all the heat radiation pipelines and the air return pipelines of all the heat radiation pipelines are sequentially in airflow communication to form a hot air circulation path. More heat radiation pipelines can be laid in a limited space, and a more uniform and better heat radiation effect can be provided.

Description

Technical Field

[0001] The utility model relates to the technical field of combustion curing furnaces for powder coating, in particular to a curing furnace used in a coating production line. Background Art

[0002] In coating production lines, workpieces are typically transported using conveying devices such as power-and-free suspension chains or power-and-free floor chains. The conveyor tracks run through the curing oven, where the workpieces are transported to the oven for curing. This process melts and solidifies the powder coating on the workpiece surface, forming a dense protective layer. Traditional curing ovens generate high-temperature air in a combustion chamber, which is then blown into the oven by a fan. Curing occurs through convection heat exchange between the hot air and the workpieces. However, the high-temperature air generated by combustion can carry smoke and dust, which can easily contaminate the coating if not thoroughly removed. Furthermore, the hot air comes into direct contact with the workpieces. If the workpieces are stacked closely together, some workpieces may not be exposed to the hot air, or the hot air may not flow between the workpieces. This can lead to uneven curing, compromising the surface quality. Therefore, this convection-based hot air curing method is not clean, environmentally friendly, and produces suboptimal curing results. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a curing furnace for a coating production line that is clean, environmentally friendly and has better curing effect.

[0004] To this end, the present invention provides a curing oven for a coating production line, wherein the coating production line includes a conveying device suitable for conveying workpieces, the conveying device includes a conveying track arranged in the curing oven, and the curing oven includes: a furnace body with a baking chamber; a plurality of heat radiation pipes laid in the baking chamber, each of the heat radiation pipes extending along a first direction, and the plurality of heat radiation pipes are arranged along a second direction different from the first direction, each of the heat radiation pipes includes an air supply pipe, a return air pipe stacked on the air supply pipe, and a connecting pipe connected between the supply air pipe and the return air pipe; a hot air generating device is constructed and suitable for generating hot air, and the hot air generating device, the air supply pipes of each of the heat radiation pipes, and the return air pipes of each of the heat radiation pipes are connected in sequence to form a path for hot air circulation.

[0005] According to an embodiment of the present invention, the plurality of heat radiation pipes are laid on the bottom wall of the baking chamber, the first direction is the length direction of the baking chamber, and the second direction is the width direction of the baking chamber.

[0006] According to an embodiment of the present invention, the conveying track is installed at the bottom of the baking chamber and is located above the plurality of heat radiation pipes.

[0007] According to an embodiment of the present invention, the plurality of heat radiation pipes are laid on the side wall of the baking chamber, the first direction is the length direction of the baking chamber, and the second direction is the height direction of the baking chamber.

[0008] According to an embodiment of the present invention, the conveying track is installed above the baking chamber and is surrounded by the plurality of heat radiation pipes.

[0009] According to one embodiment of the present invention, the hot air generating device includes a hot air furnace, a heating source, a first hot air duct, a second hot air duct and a circulating fan, the hot air furnace has a heating chamber, the heating source is arranged in the heating chamber, one end of the first hot air duct is connected to the heating chamber, and the other end is connected to the supply air duct of each of the heat radiation ducts in an airflow manner, and one end of the second hot air duct is connected to the heating chamber, and the other end is connected to the return air duct of each of the heat radiation ducts in an airflow manner.

[0010] According to one embodiment of the present invention, the hot air generating device also includes a first distribution pipe, the first distribution pipe includes a first air inlet and multiple first air outlets, the first air inlet is connected to the first hot air pipe, and each of the first air outlets is connected to the air supply pipe of each of the heat radiation pipes.

[0011] According to one embodiment of the present invention, the hot air generating device also includes a second distribution pipe, the second distribution pipe includes multiple second air inlets and a second air outlet, each of the second air inlets is connected to the return air duct of each of the heat radiation pipes, and the second air outlet is connected to the second hot air duct.

[0012] According to an embodiment of the present invention, each of the heat radiation pipes is U-shaped.

[0013] According to one embodiment of the present invention, the conveying device also includes a chain track, a conveying chain, a driving mechanism and an accumulation trolley. The conveying track and the chain track are both passed through the baking chamber. The conveying chain is movably arranged on the chain track and driven by the driving mechanism. The accumulation trolley is movably arranged on the conveying track and driven by the conveying chain. The accumulation trolley is provided with a coating tool suitable for supporting the workpiece.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] Because the supply and return ducts of each heat radiation duct are stacked, they achieve good thermal contact. This allows the hot air to radiate as much heat as possible into the curing oven both during its entry and return, resulting in a better heat radiation effect. Furthermore, the stacked supply and return ducts reduce the floor space occupied by the heat radiation ducts within the curing oven, allowing for more ducts to be installed within a limited space, providing a more uniform and improved heat radiation effect. This structure is particularly suitable for curing coatings requiring high surface quality, as it reduces the formation of bubbles within the coating and improves the quality of the cured product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic cross-sectional view of a curing furnace according to an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 A partial enlarged view of point A shown in FIG;

[0018] Figure 3 yes Figure 1 A schematic top cross-sectional view of a curing oven shown in FIG.

[0019] Figure 4 yes Figure 1 A schematic side cross-sectional view of a curing oven shown in FIG. 1 (showing the air supply path);

[0020] Figure 5 yes Figure 4 A partial enlarged view of point B shown in FIG;

[0021] Figure 6 yes Figure 1 A schematic side cross-sectional view of the curing oven shown in FIG. 1 (showing the return air path);

[0022] Figure 7 yes Figure 6 A partial enlarged view of point C shown in FIG;

[0023] Figure 8 yes Figure 3 The structural diagram of the heat radiation pipe is shown in FIG;

[0024] Figure 9 yes Figure 1 Schematic diagram of hot air flow direction of the heat radiation pipe shown in;

[0025] Figure 10 yes Figure 1 Schematic diagram of air supply between the hot air generating device and the heat radiation duct shown in ;

[0026] Figure 11 yes Figure 1 Schematic diagram of return air between the hot air generating device and the heat radiation duct shown in ;

[0027] Figure 12 yes Figure 1 A schematic top cross-sectional view of the hot air generating device shown in FIG;

[0028] The accompanying drawings are numerals as follows:

[0029] 100, curing furnace; 101, furnace body; 102, baking chamber; 103, heat radiation duct; 104, air supply duct; 105, return air duct; 106, connecting duct; 107, hot air generating device; 108, hot air furnace; 109, heating source; 110, first hot air duct; 111, second hot air duct; 112, circulating fan; 113, heating chamber; 114, first distribution duct; 115, first air inlet; 116, first air outlet; 117, second distribution duct; 118, second air inlet; 119, second air outlet;

[0030] 200, conveying device; 201, conveying track; 202, accumulation trolley; 203, coating tool;

[0031] 300. Workpiece. DETAILED DESCRIPTION

[0032] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural methods and implementation methods. Therefore, the following specific embodiments and drawings are only illustrative of the technical solution of the present invention and should not be regarded as the entire present invention or as a limitation or restriction of the technical solution of the present invention.

[0033] according to Figure 1 、 Figure 3 、 Figure 4 and Figure 6 As shown, one embodiment of the present invention provides a curing oven 100 for a coating production line. The coating production line includes a conveying device 200 suitable for conveying a workpiece 300 . The conveying device 200 includes a conveying track 201 disposed in the curing oven 100 .

[0034] according to Figure 2As shown, the conveying device 200 includes a chain track, a conveyor chain, a drive mechanism, and an accumulation trolley 202. The conveyor track 201 and the chain track both pass through the baking chamber 102. The conveyor chain is movably mounted on the chain track and driven by the drive mechanism. The accumulation trolley 202 is movably mounted on the conveyor track 201 and driven by the conveyor chain. The accumulation trolley 202 is provided with a coating tool 203 suitable for supporting the workpiece 300. In this embodiment, the conveying device 200 is a accumulation-type ground chain. In other embodiments, the conveying device 200 may also be an accumulation-type suspended chain, without limitation.

[0035] according to Figure 3 、 Figure 4 and Figure 6 As shown, the curing oven 100 includes a furnace body 101, multiple heat radiation pipes 103, and a hot air generating device 107. The furnace body 101 has a baking chamber 102. Multiple heat radiation pipes 103 are laid out within the baking chamber 102. Each heat radiation pipe 103 includes a supply air duct 104, a return air duct 105 stacked on the supply air duct 104, and a connecting pipe 106 connecting the supply air duct 104 and the return air duct 105 at their ends. The hot air generating device 107, the supply air duct 104 of each heat radiation pipe 103, and the return air duct 105 of each heat radiation pipe 103 are sequentially connected to form a path for hot air circulation.

[0036] according to Figure 3 、 Figure 8 and Figure 9 As shown, each heat radiation pipe 103 extends along a first direction, and multiple heat radiation pipes 103 are arranged along a second direction different from the first direction. In this embodiment, multiple heat radiation pipes 103 are laid on the bottom wall of the baking chamber 102, the first direction is the length direction of the baking chamber 102, and the second direction is the width direction of the baking chamber 102. The conveying track 201 is erected on the bottom of the baking chamber 102 and is located above the multiple heat radiation pipes 103. The shape of each heat radiation pipe 103 is U-shaped. The heat radiation pipe 103 can radiate heat from bottom to top to the workpiece 300, so that the workpiece 300 can be evenly heated from entering the baking chamber 102 to leaving the baking chamber 102, with a good curing effect, and is particularly suitable for the ground chain conveyor device 200.

[0037] Because the supply ducts 104 and return ducts 105 of each heat radiation duct 103 are stacked, the supply ducts 104 and return ducts 105 are in good thermal contact. The hot air can radiate heat into the curing oven 100 both during its entry and return, resulting in a better heat radiation effect. Furthermore, the stacked supply ducts 104 and return ducts 105 can save space within the curing oven 100 for laying the heat radiation ducts 103, allowing for more heat radiation ducts 103 to be laid within a limited space, providing a more uniform and improved heat radiation effect. This structure is particularly suitable for curing coatings requiring high surface quality, as it can reduce the formation of bubbles within the coating and improve the quality of the cured product.

[0038] In other embodiments, multiple heat radiation pipes 103 may be laid along the sidewalls of the baking chamber 102, with the first direction being the length of the baking chamber 102 and the second direction being the height of the baking chamber 102. The conveyor track 201 is erected above the baking chamber 102 and surrounded by the multiple heat radiation pipes 103, and is particularly suitable for a power-and-free hanging chain. The shape of each heat radiation pipe 103 may also be V-shaped or C-shaped, without limitation.

[0039] according to Figures 10 to 12 As shown, the hot air generating device 107 includes a hot air furnace 108, a heating source 109, a first hot air duct 110, a second hot air duct 111 and a circulating fan 112. The hot air furnace 108 has a heating chamber 113. The heating source 109 is arranged in the heating chamber 113. One end of the first hot air duct 110 is connected to the heating chamber 113, and the other end is connected to the air supply duct 104 of each heat radiation duct 103 in an airflow manner. One end of the second hot air duct 111 is connected to the heating chamber 113, and the other end is connected to the return air duct 105 of each heat radiation duct 103 in an airflow manner.

[0040] In this embodiment, the heating source 109 is a gas burner and the circulating fan 112 is a centrifugal fan. In other embodiments, the heating source 109 may also be other fuel burners, such as an oil burner, and the circulating fan 112 may also be an air pump, an axial flow fan, etc., without specific limitation.

[0041] according to Figure 5 、 Figure 9 and Figure 10 As shown, the hot air generating device 107 also includes a first distribution pipe 114, the first distribution pipe 114 includes a first air inlet 115 and multiple first air outlets 116, the first air inlet 115 is connected to the first hot air pipe 110, and each first air outlet 116 is connected to the air supply pipe 104 of each heat radiation pipe 103.

[0042] according to Figure 7 、 Figure 9 and Figure 11 As shown, correspondingly, the hot air generating device 107 also includes a second distribution pipe 117, the second distribution pipe 117 includes multiple second air inlets 118 and a second air outlet 119, each second air inlet 118 is connected to the return air pipe 105 of each heat radiation pipe 103, and the second air outlet 119 is connected to the second hot air pipe 111.

[0043] The hot air output from the first hot air duct 110 is uniformly distributed to the supply air ducts 104 of the multiple heat radiation ducts 103 through the first distribution duct 114, and the hot air from the return air ducts 105 of the multiple heat radiation ducts 103 is uniformly returned to the second hot air duct 111 through the second distribution duct 117, which can achieve one-to-many and simpler structure.

[0044] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the scope of protection of the present invention.

Claims

1. A curing oven for a coating production line, the coating production line comprising a conveying device suitable for conveying workpieces, the conveying device comprising a conveying track arranged in the curing oven, characterized in that: The curing oven comprises: A furnace body having a baking chamber; a plurality of heat radiation pipes, laid in the baking chamber, each of the heat radiation pipes extending along a first direction, the plurality of heat radiation pipes being arranged along a second direction different from the first direction, each of the heat radiation pipes including an air supply pipe, a return air pipe stacked on the air supply pipe, and a connecting pipe connected between the end of the air supply pipe and the return air pipe; The hot air generating device is configured to generate hot air. The hot air generating device, the air supply ducts of the heat radiation ducts, and the air return ducts of the heat radiation ducts are sequentially connected by airflow to form a path for hot air circulation.

2. The curing oven according to claim 1, wherein: The plurality of heat radiation pipes are laid on the bottom wall of the baking chamber, the first direction is the length direction of the baking chamber, and the second direction is the width direction of the baking chamber.

3. The curing oven according to claim 2, wherein: The conveying track is mounted on the bottom of the baking chamber and is located above the plurality of heat radiation pipes.

4. The curing oven according to claim 1, wherein: The plurality of heat radiation pipes are laid on the side wall of the baking chamber, the first direction is the length direction of the baking chamber, and the second direction is the height direction of the baking chamber.

5. The curing oven according to claim 4, characterized in that: The conveying track is mounted above the baking chamber and is surrounded by the plurality of heat radiation pipes.

6. The curing oven according to claim 1, wherein: The hot air generating device includes a hot air furnace, a heating source, a first hot air duct, a second hot air duct and a circulating fan. The hot air furnace has a heating chamber. The heating source is arranged in the heating chamber. One end of the first hot air duct is connected to the heating chamber, and the other end is connected to the supply air duct of each of the heat radiation ducts. One end of the second hot air duct is connected to the heating chamber, and the other end is connected to the return air duct of each of the heat radiation ducts.

7. The curing oven according to claim 6, characterized in that: The hot air generating device also includes a first distribution pipe, which includes a first air inlet and multiple first air outlets. The first air inlet is connected to the first hot air pipe, and each of the first air outlets is connected to the air supply pipe of each of the heat radiation pipes.

8. The curing oven according to claim 7, characterized in that: The hot air generating device also includes a second distribution pipe, which includes multiple second air inlets and a second air outlet. Each of the second air inlets is connected to the return air pipe of each of the heat radiation pipes, and the second air outlet is connected to the second hot air pipe.

9. The curing oven according to claim 1, wherein: Each of the heat radiation pipes is U-shaped.

10. The curing oven according to claim 1, wherein: The conveying device also includes a chain track, a conveying chain, a driving mechanism and an accumulation trolley. The conveying track and the chain track are both arranged through the baking chamber. The conveying chain is movably arranged on the chain track and driven by the driving mechanism. The accumulation trolley is movably arranged on the conveying track and driven by the conveying chain. The accumulation trolley is provided with a coating tool suitable for supporting the workpiece.

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