Multilayer painting assembly line

Abstract

The invention provides a multilayer painting assembly line which comprises a lower-layer space, an upper-layer space and a transfer assembly line, the upper-layer space is located above the lower-layer space, a communication channel is formed between the upper-layer space and the lower-layer space, and the transfer assembly line flows between the lower-layer space and the upper-layer space through the communication channel. A workpiece feeding area, a workpiece discharging area and a powder spraying area are arranged in the lower-layer space, the forward stroke of the transfer assembly line sequentially passes through the workpiece feeding area and the powder spraying area, the return stroke of the transfer assembly line passes through the workpiece discharging area, powder spraying equipment is arranged in the powder spraying area, and the workpiece feeding area is used for hanging workpieces to be painted on the transfer assembly line. And the workpiece discharging area is used for taking down the paint-baked workpieces from the transfer assembly line. According to the technical scheme, the vertical space of a plant is effectively utilized, the utilization rate of a production site is increased, and the paint baking equipment is arranged on the upper layer, so that the adverse effects on the workpiece feeding area and the workpiece discharging area in the lower layer space are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of painting manufacturing, in particular to a multi-layer painting production line. Background Art

[0002] In the field of industrial manufacturing, spraying and baking processes are essential links in the production process of many products. Most existing spraying line designs adopt a single-layer structure. This structure usually sets up a straight or circular assembly line on the first floor of the factory. Workers hang the workpieces in the upper area manually or mechanically. Then the assembly line passes through the spraying process area and the baking process area in turn, and finally unloads the workpieces in the lower area. In such a layout, the spraying and baking processes are arranged in the same lower space, forming a compact process flow line.

[0003] From the existing design, the single-layer spraying line has certain advantages, such as relatively simple process flow, clear transmission path of workpieces, and convenient operation and maintenance for workers. However, this design requires a large plane area, especially for factories that need to process large quantities of workpieces, the problem of low site utilization is particularly obvious. In addition, the baking process will generate a lot of heat and volatile gases during the process. These heat and gases can easily spread to other areas of the factory through the conveying port of the assembly line, causing pollution to the environment inside the factory.

[0004] It can be seen that the main problems of the existing single-layer spraying assembly line are the deficiencies in space utilization and environmental protection. First, the single-layer structure makes the vertical space of the factory building not be effectively utilized. Especially in factories with higher floor heights, the inefficient plane layout limits the factory's production capacity and expansion space. Second, the harmful gases and heat generated during the baking process diffuse in the same plane and cannot be effectively guided and treated, which can easily have an adverse effect on the working environment. This design not only increases safety hazards in the production process, but also brings additional ventilation and refrigeration processing costs to the company. Overall, the existing single-layer spraying assembly line is in urgent need of improvement in terms of efficiency, environmental protection and heat emission. Summary of the invention

[0005] The main purpose of the present invention is to provide a multi-layer painting production line to solve the problems of low site utilization and impact on factory links that are easily encountered in single-layer painting production lines in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a multi-layer painting assembly line, characterized in that it includes a lower space, an upper space and a transfer assembly line, the upper space is located above the lower space, and a connecting channel is opened between the upper space and the lower space, and the transfer assembly line flows between the lower space and the upper space through the connecting channel; an upper piece area, a lower piece area and a powder spraying area are arranged in the lower space, the outward journey of the transfer assembly line passes through the upper piece area and the powder spraying area in sequence, and the return journey of the transfer assembly line passes through the lower piece area, a powder spraying equipment is arranged in the powder spraying area, the upper piece area is used to hang workpieces to be painted on the transfer assembly line, and the lower piece area is used to remove workpieces after painting from the transfer assembly line; a paint baking area is arranged in the upper space, and a paint baking equipment is arranged in the paint baking area.

[0007] Furthermore, an exhaust device is provided at the top of the upper space, and the exhaust device is located above the paint baking area. The exhaust device is used to discharge the gas in the paint baking area out of the upper space.

[0008] Furthermore, there is one connecting channel, and the transfer line is in a zigzag ring shape, and both the outbound journey and the return journey of the transfer line pass through the connecting channel.

[0009] Furthermore, there are two connecting channels, and the transfer line is ring-shaped. The outbound journey of the transfer line passes through one connecting channel, and the return journey of the transfer line passes through another connecting channel.

[0010] Furthermore, a dust removal area is also provided in the lower space, and the dust removal area is located between the upper area and the powder spraying area. A baking device is provided in the dust removal area, and the baking device is used to remove dust from the workpiece to be painted.

[0011] Furthermore, a powder spraying inspection area is also provided in the lower space. The powder spraying inspection area is located downstream of the powder spraying area. The powder spraying inspection area is used to inspect whether the workpiece after powder spraying is evenly powdered.

[0012] Furthermore, the powder spraying equipment includes an automatic powder spraying device and a manual powder spraying device. The automatic powder spraying device is a manipulator-type powder spraying device, and the manual powder spraying device is a handheld spray gun-type powder spraying device.

[0013] Furthermore, the transfer line includes: a running belt, which is erected in the lower space and the upper space; a driving device, which is connected to the running belt and is used to drive the running belt to move; and a hook assembly, which is hung on the running belt and is used to hang the workpiece.

[0014] Furthermore, the hook assembly includes: a fixing member; a hanging member, including a cantilever and a hanging head arranged at the end of the cantilever, and the upper end of the cantilever can be pivotally arranged on the fixing member; a hook, including a first connecting member and a hook portion fixedly arranged on the first connecting member, the first connecting member has an avoidance hole, the cantilever is inserted into the avoidance hole, and the cantilever can rotate circumferentially in the avoidance hole, a matching structure is arranged at the avoidance hole of the first connecting member, the first connecting member is hung on the hanging head through the matching structure, and the supporting surface of the supporting matching structure of the hanging head has a plurality of convex surfaces of the same shape arranged along the circumferential direction, and the matching structure has a concave surface corresponding to the plurality of convex surfaces.

[0015] Furthermore, the fixing member includes two mounting plates arranged opposite to each other, the mounting plates include fixing sections at both ends and a mounting section located between the two fixing sections, the two mounting plates are fixedly connected by the fixing sections at both ends, the mounting sections of the two mounting plates protrude outwardly to provide an accommodating space between the two mounting sections, the upper end of the cantilever is pivotally arranged on the two mounting sections via a pivot, and the upper end of the cantilever can swing within the accommodating space.

[0016] By applying the technical solution of the present invention, by separating the spraying process and the baking paint process into the upper and lower spaces, the upper and lower parts areas in the lower space and the powder spraying area form a compact and orderly processing flow, so that the workpiece to be painted can complete the powder spraying operation in the lower space. The transfer assembly line uses the connecting channel to efficiently transport the workpiece to the baking paint area in the upper space, thereby realizing the layered processing of powder spraying and baking paint in the same production process. As a result, not only the vertical space of the factory is effectively utilized and the utilization rate of the production site is improved, but also by arranging the baking paint equipment on the upper layer, the heat and gas generated in the baking paint process can be discharged upward from the factory along the direction of the hot air flow, reducing the adverse effects on the upper and lower parts areas in the lower space. The present invention is based on the principle of rising hot air flow and the chimney principle. The harmful gases and heat generated in the baking paint process can naturally rise and be discharged through the top of the upper space. On the one hand, this layout effectively prevents harmful gases from spreading to the lower space, significantly improves the air quality in the upper and lower parts areas and the powder spraying area, and protects the health of the workers; on the other hand, since the heat is mainly concentrated in the upper space, the possibility of the equipment and personnel in the lower space being affected by high temperatures is reduced, thereby reducing the dependence on air-conditioning equipment in the lower space, significantly reducing the power consumption and operating costs of the air-conditioning system. At the same time, this layered treatment solution for heat and harmful gases further improves the safety and comfort of the overall factory environment, providing an important guarantee for efficient production.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 A schematic structural diagram of a multi-layer painting production line according to a first embodiment of the present invention is shown;

[0020] Figure 2 Shows Figure 1 A schematic diagram of the structure of the powder spraying equipment of the multi-layer painting line;

[0021] Figure 3 Shows Figure 1 A schematic diagram of the structure of the hook assembly at A of the multi-layer painting line;

[0022] Figure 4 Shows Figure 3 A schematic cross-sectional view of a hook assembly;

[0023] Figure 5 A structural schematic diagram of a second embodiment of a multi-layer painting production line according to the present invention is shown. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Figure 1 The schematic diagram of the structure of the embodiment 1 of a multi-layer painting line of the present invention is shown. The multi-layer painting line includes a lower space a, an upper space b and a transfer line 80. The upper space is located above the lower space, and a connecting channel c is provided between the upper space and the lower space. The transfer line 80 flows between the lower space and the upper space through the connecting channel c. An upper part area 10, a lower part area 20 and a powder spraying area are provided in the lower space. The outbound journey of the transfer line 80 passes through the upper part area and the powder spraying area in turn, and the return journey of the transfer line 80 passes through the lower part area. A powder spraying device 30 is provided in the powder spraying area. The upper part area is used to hang the workpiece to be painted on the transfer line 80, and the lower part area is used to remove the workpiece after baking paint from the transfer line 80. A baking paint area is provided in the upper space, and a baking paint device 40 is provided in the baking paint area.

[0029] By applying the technical solution of the present invention, by separating the spraying process and the baking paint process into the upper and lower spaces, the upper area 10 and the lower area 20 in the lower space a and the powder spraying area form a compact and orderly processing flow, so that the workpiece to be painted can complete the powder spraying operation in the lower space a. The transfer line 80 uses the connecting channel c to efficiently transport the workpiece to the baking paint area in the upper space b, thereby realizing the layered processing of powder spraying and baking paint in the same production process. As a result, not only the vertical space of the factory is effectively utilized and the utilization rate of the production site is improved, but also by arranging the baking paint equipment 40 on the upper layer, the heat and gas generated in the baking paint process can be discharged upward from the factory along the direction of the hot air flow, reducing the adverse effects on the upper area 10 and the lower area 20 in the lower space a. The present invention is based on the principle of rising hot air flow and the chimney principle, and the harmful gases and heat generated in the baking paint process can naturally rise and be discharged through the top of the upper space b. On the one hand, this layout effectively prevents harmful gases from diffusing to the lower space a, significantly improves the air quality of the upper area 10, the lower area 20 and the powder spraying area, and protects the health of the workers; on the other hand, since the heat is mainly concentrated in the upper space b, the possibility of the equipment and personnel in the lower space a being affected by high temperature is reduced, thereby reducing the dependence on the air-conditioning equipment in the lower space, significantly reducing the power consumption and operating costs of the air-conditioning system. At the same time, this layered treatment scheme for heat and harmful gases further improves the safety and comfort of the overall factory environment, providing an important guarantee for efficient production.

[0030] like Figure 1 As shown, as a preferred embodiment, in the technical solution of Example 1, an exhaust device 50 is provided at the top of the upper space, and the exhaust device is located above the paint baking area. The exhaust device is used to discharge the gas from the paint baking area to the upper space. An exhaust device 50 is provided at the top of the upper space b, and the device is located above the paint baking area, which can efficiently and quickly discharge the gas generated during the paint baking process from the upper space b. Based on the principle of rising hot air flow, the high-temperature gas and harmful volatiles generated during the paint baking process will naturally gather at the top of the upper space. The arrangement of the exhaust device 50 ensures that these gases can be discharged from the factory in time, thereby avoiding their accumulation in the upper space b. This design not only improves the environmental safety of the paint baking area, prevents the impact of harmful gases on operating equipment and personnel, but also further reduces the risk of gas diffusion to the lower space a, and protects the working environment of the upper part area 10, the lower part area 20 and the powder spraying area in the lower space. This optimized gas exhaust structure effectively improves the environmental performance of the entire production line and the air quality in the factory.

[0031] As an optional implementation, Figure 1As shown, in the technical solution of the first embodiment, there is one connecting channel c, and the transfer assembly line 80 is in a zigzag ring shape, and both the outbound and return journeys of the transfer assembly line 80 pass through the connecting channel c. In the first embodiment, there is one connecting channel c, and the transfer assembly line 80 is designed as a zigzag ring structure, so that both the outbound and return journeys of the transfer assembly line pass through the connecting channel c. This design simplifies the spatial layout and makes the connection between the upper and lower spaces more compact and efficient. Through a single connecting channel c, the connecting area between the upper space b and the lower space a where the paint baking area is located is reduced, and the diffusion of the upper space b to the lower space is reduced. This structure optimizes the space utilization rate of the plant and further reduces the complexity of equipment installation and maintenance. In addition, the transfer assembly line 80 with a zigzag ring structure can also be provided with other processing links in the area where the transfer assembly line 80 avoids other equipment.

[0032] As a more preferred embodiment, Figure 1 As shown, in the technical solution of the first embodiment, a dust removal area 60 is also provided in the lower space, and the dust removal area 60 is located between the upper area and the powder spraying area. The dust removal area 60 is provided with a baking device, and the baking device is used to remove dust from the workpiece to be painted. Through the effect of the baking device, the dust and impurities attached to the surface of the workpiece can be effectively removed to ensure the surface treatment quality of the powder spraying process. This design completes the pretreatment before the workpiece enters the powder spraying area, which helps to improve the operating efficiency of the powder spraying equipment 30 and significantly improves the adhesion and uniformity of the coating.

[0033] like Figure 1 As shown, in the technical solution of embodiment 1, optionally, a powder spraying inspection area 70 is also provided in the lower space, and the powder spraying inspection area 70 is located downstream of the powder spraying area. The powder spraying inspection area 70 is used to check whether the workpiece after powder spraying is uniformly powdered. The powder spraying inspection area 70 is set in the lower space a, and it is arranged at the downstream position of the powder spraying area, so that the workpiece after powder spraying can undergo powder spraying quality inspection before entering the next process. The powder spraying inspection area 70 is used to check whether the surface of the workpiece is uniformly powdered, and can identify defects or uneven phenomena during the powder spraying process, thereby ensuring the overall quality of the coating. Through this setting, it is possible to effectively prevent the spraying defective workpiece from entering the paint baking area, and reduce the waste of production costs caused by rework or waste treatment. It should be noted that the powder spraying inspection area 70 can be set for manual inspection, or it can be set for automatic inspection based on visual recognition artificial intelligence.

[0034] Optional, such as Figure 2As shown, the powder spraying equipment 30 includes an automatic powder spraying device 31 and a manual powder spraying device 32, wherein the automatic powder spraying device 31 is a manipulator-type powder spraying device, and the manual powder spraying device 32 is a handheld spray gun-type powder spraying device. The automatic powder spraying device 31 is a manipulator-type powder spraying device, which has high-precision automatic operation capability, and can quickly and evenly spray the surface of the workpiece according to a preset program, significantly improving the production efficiency of the powder spraying area. The manual powder spraying device 32 is a handheld spray gun-type powder spraying device, which provides a flexible manual operation function, and can supplement the spraying treatment of workpieces that may be missed or have special shapes during the automatic powder spraying process. This design combines the advantages of automation and manual operation, while improving the quality and efficiency of powder spraying, it also enhances the adaptability to complex or special workpieces, and effectively meets the diversified requirements of the upper part area 10, the powder spraying area and the lower part area 20 in the lower space a for the spraying process. Through this equipment configuration, the stability and consistency of the overall powder spraying process are ensured.

[0035] like Figure 1 As shown, optionally, as a more preferred embodiment, the transfer line 80 includes a running belt 81, a driving device 82 and a hook assembly. The running belt 81 is set up in the lower space and the upper space, the driving device 82 is connected to the running belt 81 for driving the running belt 81 to move, and the hook assembly is hung on the running belt 81 for hanging the workpiece. The running belt 81 is set up in the lower space a and the upper space b to form a logistics path that runs through the two spaces. The driving device 82 is connected to the running belt 81 for driving, which can achieve stable and continuous movement and ensure the efficient flow of workpieces in the production process. The hook assembly is hung on the running belt 81 for hanging the workpiece safely and reliably. This design realizes the seamless connection between the upper part area 10, the powder spraying area and the lower part area 20 in the lower space and the paint baking area in the upper space, and reduces the need for manual intervention in the workpiece transfer process through automated transmission, thereby improving production efficiency. At the same time, the use of different hook components can adapt to workpieces of different sizes and shapes, improve the versatility and flexibility of the assembly line, and ensure the continuity and stability of the production process.

[0036] like Figure 3 and Figure 4As shown, in the technical solution of this embodiment, the hook assembly includes a fixing member 83, a hanging member 84 and a hook 85. Among them, the hanging member 84 includes a cantilever 841 and a hanging head 842 arranged at the end of the cantilever 841, and the upper end of the cantilever 841 can be pivotally arranged on the fixing member 83. The hook 85 includes a first connecting member 851 and a hook portion 852 fixedly arranged on the first connecting member 851, the first connecting member 851 has an avoidance hole, the cantilever 841 is inserted into the avoidance hole, and the cantilever 841 can rotate circumferentially in the avoidance hole, and a matching structure 853 is provided at the avoidance hole of the first connecting member 851, the first connecting member 851 is hung on the hanging head 842 through the matching structure 853, and the supporting surface of the supporting matching structure 853 of the hanging head 842 has a plurality of convex surfaces of the same shape arranged along the circumferential direction, and the matching structure 853 has a concave surface corresponding to the plurality of convex surfaces. By applying the technical solution of this embodiment, since the upper end of the cantilever 841 is pivotally arranged on the fixing member 83, even if the fixing member 83 moves to the inclined section of the running belt 81, the cantilever 841 will be vertically downward under the action of gravity, ensuring that the parts to be processed on each hook assembly on the inclined running belt 81 remain in a vertical state, reducing the probability of collision between two adjacent parts to be processed. In addition, even if there is a collision between two adjacent parts to be processed, since the convex surface of the suspension head 842 cooperates with the concave surface of the matching structure 853, that is, in the circumferential direction, the convex surface will stop the concave surface, thereby preventing the matching structure 853 from rotating relative to the suspension head 842, thereby avoiding the displacement of the hook 852 in the circumferential direction, and finally avoiding the unexpected rotation of the parts to be processed, ensuring the quality of subsequent painting. Finally, by applying the technical solution of this embodiment, during the hooking process, the matching structure 853 can be manually rotated according to the actual situation to ensure that the direction of the parts hooked by the hook 852 is convenient for subsequent painting.

[0037] In this embodiment, if Figure 3 and Figure 4 As shown, the fixing member 83 includes two mounting plates 831 arranged opposite to each other, the mounting plates 831 include fixing sections at both ends and a mounting section located between the two fixing sections, the two mounting plates 831 are fixedly connected through the fixing sections at both ends, the mounting sections of the two mounting plates 831 protrude outwardly so that there is a receiving space between the two mounting sections, the upper end of the cantilever 841 is pivotally arranged on the two mounting sections through a pivot, and the upper end of the cantilever 841 can swing in the receiving space. The above structure can not only realize the connection between the fixing member 83 and the hanging member 84, but also provide space for the hanging member 84 to swing.

[0038] like Figure 3 and Figure 4As shown, in the present embodiment, the convex surface is an arc surface, and the concave surface is an arc surface adapted to the convex surface. The above structure allows the staff to rotate the matching structure 853 to adjust the direction of the hook 852 more smoothly. The arc transition is between two adjacent convex surfaces, and the arc transition is between two adjacent concave surfaces. The above structure further allows the staff to rotate the matching structure 853 to adjust the direction of the hook 852 more smoothly. In the present embodiment, there are four convex surfaces. The above structure allows the hook 852 to be limited at 0°, 90°, 180° and 270°, so that the hanging method of the parts to be processed is more flexible, that is, different parts can be hung at different angles according to actual needs, so that different parts can be evenly painted. Of course, in other embodiments not shown in the figure, more convex surfaces can be set, and the specific number is set according to actual needs.

[0039] More preferably, in this embodiment, Figure 3 and Figure 4 As shown, the hook 85 further includes a second connecting member 854 disposed below the first connecting member 851, the suspension head 842 is located between the first connecting member 851 and the second connecting member 854, and the hook portion 852 is disposed at a position corresponding to the suspension member 84 at the bottom of the second connecting member 854. The above structure enables the hook portion 852 to be coaxial with the suspension head 842, so that the hook assembly can be miniaturized.

[0040] Optional, such as Figure 3 and Figure 4 As shown, the first connecting member 851 and the second connecting member 854 are two connecting plates arranged in parallel, and the two connecting plates are detachably connected by a fastener 855. The above structure allows the suspension member 84 to be an integrated structure, thereby simplifying the number of parts. Specifically, during installation, the suspension member 84 is firstly inserted on the first connecting member 851 from bottom to top, and then the first connecting member 851 and the second connecting member 854 are connected by the fastener 855, and finally, the suspension member 84 is pivotally connected to the fixing member 83.

[0041] It should be noted that the lower space a defined in the present invention can be multi-layer or single-layer. The multi-layer lower space a can be reasonably arranged with upper parts area 10, lower parts area 20 and powder spraying area as needed.

[0042] As another optional implementation, Figure 5As shown, the present invention also provides a second embodiment. The difference between the second embodiment and the first embodiment is that in the technical solution of the second embodiment, there are two connecting channels c, and the transfer line 80 is annular. The outbound journey of the transfer line 80 passes through one connecting channel c, and the return journey of the transfer line 80 passes through another connecting channel c. The connecting channels c are set to two, and the transfer line 80 adopts a ring design, wherein the outbound journey passes through one connecting channel c, and the return journey passes through another connecting channel c. This design significantly optimizes the logistics path between the upper and lower spaces, forming independent outbound and return channels, and avoiding the problem of workpiece transportation crossing or congestion that may occur in the single-channel design. Through such a dual-channel structure, the transfer line can achieve more efficient workpiece transmission between the upper part area 10, the powder spraying area and the lower part area 20 of the lower space a and the paint baking area of ​​the upper space b.

[0043] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-layer painting line, characterized in that: The invention comprises a lower space (a), an upper space (b) and a transfer line (80), wherein the upper space is located above the lower space, and a connecting passage (c) is provided between the upper space and the lower space, and the transfer line (80) flows between the lower space and the upper space through the connecting passage (c); The lower space is provided with an upper workpiece area (10), a lower workpiece area (20) and a powder spraying area. The outbound journey of the transfer line (80) passes through the upper workpiece area and the powder spraying area in sequence, and the return journey of the transfer line (80) passes through the lower workpiece area. A powder spraying device (30) is provided in the powder spraying area. The upper workpiece area is used to hang workpieces to be painted on the transfer line (80), and the lower workpiece area is used to remove the painted workpieces from the transfer line (80); A paint baking area is arranged in the upper space, and a paint baking device (40) is arranged in the paint baking area.

2. The multi-layer painting line according to claim 1, characterized in that: An exhaust device (50) is arranged at the top of the upper space. The exhaust device is located above the paint baking area and is used to discharge the gas in the paint baking area out of the upper space.

3. The multi-layer painting line according to claim 1, characterized in that: There is one connecting channel (c), and the transfer line (80) is in a zigzag ring shape. The outbound journey of the transfer line (80) and the return journey of the transfer line (80) both pass through the connecting channel (c).

4. The multi-layer painting line according to claim 1, characterized in that: There are two connecting channels (c), and the transfer line (80) is ring-shaped. The outbound journey of the transfer line (80) passes through one connecting channel (c), and the return journey of the transfer line (80) passes through another connecting channel (c).

5. The multi-layer painting line according to claim 1, characterized in that: A dust removal area (60) is also provided in the lower space, and the dust removal area (60) is located between the upper area and the powder spraying area. The dust removal area (60) is provided with a heating device, and the heating device is used to remove dust from the workpiece to be painted.

6. The multi-layer painting line according to claim 1, characterized in that: A powder spraying inspection area (70) is also provided in the lower space. The powder spraying inspection area (70) is located downstream of the powder spraying area. The powder spraying inspection area (70) is used to inspect whether the workpiece after powder spraying is uniformly powder sprayed.

7. The multi-layer painting line according to claim 1, characterized in that: The powder spraying equipment (30) comprises an automatic powder spraying device (31) and a manual powder spraying device (32); the automatic powder spraying device (31) is a manipulator-type powder spraying device, and the manual powder spraying device (32) is a handheld spray gun-type powder spraying device.

8. The multi-layer painting line according to claim 1, characterized in that: The transfer line (80) comprises: A running belt (81), wherein the running belt (81) is installed in the lower space and the upper space; A driving device (82) is drivingly connected to the running belt (81) and is used to drive the running belt (81) to move; A hook assembly is hung on the running belt (81) and is used for hanging workpieces.

9. The multi-layer painting line according to claim 8, characterized in that: The hook assembly comprises: A fixing member (83); A suspension member (84), comprising a cantilever (841) and a suspension head (842) arranged at the end of the cantilever (841), wherein the upper end of the cantilever (841) is pivotally arranged on the fixing member (83); The hook (85) comprises a first connecting member (851) and a hook portion (852) fixedly arranged on the first connecting member (851); the first connecting member (851) has an avoidance hole, the cantilever (841) is inserted into the avoidance hole, and the cantilever (841) can rotate circumferentially in the avoidance hole; a matching structure (853) is arranged at the avoidance hole of the first connecting member (851); the first connecting member (851) is hung on the hanging head (842) through the matching structure (853); the supporting surface of the hanging head (842) supporting the matching structure (853) has a plurality of convex surfaces of the same shape arranged along the circumferential direction, and the matching structure (853) has a concave surface corresponding to the plurality of convex surfaces.

10. The multi-layer painting line according to claim 9, characterized in that: The fixing member (83) comprises two mounting plates (831) arranged opposite to each other, the mounting plates (831) comprising fixing sections at two ends and a mounting section located between the two fixing sections, the two mounting plates (831) are fixedly connected via the fixing sections at their respective ends, the mounting sections of the two mounting plates (831) protrude outwardly so that there is a receiving space between the two mounting sections, the upper end of the cantilever (841) is pivotally arranged on the two mounting sections via a pivot, and the upper end of the cantilever (841) can swing within the receiving space.

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