A combined rod plastic spraying production line

Abstract

The application discloses a combined rod plastic spraying production line, relates to the technical field of plastic spraying production lines, and solves the problem that the existing plastic spraying production line is not suitable for combined rods. The production line comprises feeding and discharging stations, a plastic spraying chamber and a curing chamber which are sequentially arranged along the conveying direction of a suspension conveyor, and the conveying line of the suspension conveyor is in a closed circulation mode. The conveying line is in an L shape, the feeding and discharging station is located on the short arm of the conveying line, the plastic spraying chamber and the curing chamber are located on the long arm of the conveying line, the conveying line encloses a storage area, and a feeding and discharging device is arranged between the feeding and discharging station and the storage area. The suspension conveyor, the plastic spraying chamber, the curing chamber and the feeding and discharging device are connected with an electric control system. The production line is reasonable in layout, high in space utilization, and is provided with the feeding and discharging device, and is high in automatic degree of feeding and discharging.

Description

Technical Field

[0001] This invention relates to the field of powder coating production line technology, and more specifically to a paddle-joint powder coating production line. Background Technology

[0002] Integrated poles, as the name suggests, combine various poles such as streetlights, signs, traffic lights, and surveillance cameras, burying overhead lines underground and transforming the "forest of poles" into a more open space. Various devices find their place on these convenient integrated poles, leading to intelligent urban road space management and services. To put it figuratively, integrated poles are like well-furnished apartments, facilitating the "move-in ready" installation of power lines, traffic lights, charging stations, environmental sensing and measurement systems, mini 5G base stations, and other facilities, equipment, or innovative applications.

[0003] After the assembly rod and its accessories are manufactured individually, they need to be coated with an anti-corrosion coating. Currently, there is no automated powder coating production line specifically for assembly rods, but existing automated powder coating production lines for other workpieces can be used as a reference in the design.

[0004] For example, patent application CN 111570132 A discloses a painting system for ring-shaped products, belonging to the field of surface painting technology for ring-shaped products. This system includes a loading area, a first spray booth, a turning device, a second spray booth, a baking oven, and an unloading area, arranged sequentially along the conveying direction of a suspended conveyor line. The suspended conveyor line is a closed-loop conveyor line, with several hangers suspended at intervals along it. These hangers are conveyed sequentially along the conveying direction of the suspended conveyor line. Each of the first and second spray booths is equipped with a corresponding painting device. However, this painting system uses manual loading and unloading, which is unsuitable for large and heavy assembled rods. Furthermore, because the suspended conveyor line is ring-shaped, when used for assembled rod powder coating, the space within the ring area cannot be used to store large and heavy assembled rods; otherwise, loading and unloading would be inconvenient. Additional storage space needs to be set up outside the ring area, resulting in an excessively large footprint and low space utilization for the entire painting system.

[0005] For example, patent application CN 111850728 A discloses a powder coating production line for automotive fuel lines, including a suspended conveyor, a curing chamber, a powder coating chamber, a heating chamber, a loading station, a cooling chamber, an inspection station, and a unloading station. The suspended conveyor is a continuous, looping conveyor line. Several hanging rods are suspended from the bottom of the suspended conveyor, and the lower ends of the hanging rods are hook-shaped. The hanging rods are connected to a detachable lifting ring at the top of the automotive fuel line through the lower ends of the hanging rods. The bottom of the lifting ring is provided with an external thread that matches the threaded hole at the top of the automotive fuel line. The suspended conveyor passes through the powder coating chamber, the curing chamber, and the cooling chamber in sequence. Before entering the powder coating chamber, the suspended conveyor passes through the loading station. After exiting the cooling chamber, the suspended conveyor passes through the inspection station and the unloading station in sequence. This powder coating production line also lacks automated loading and unloading devices, making it unsuitable for large and heavy composite rods. Furthermore, since the circulating conveyor line is arranged in an "n" shape, when it is used for composite rod powder coating, the space within the "n" shape cannot be used to store large and heavy composite rods, otherwise it would be inconvenient for loading and unloading. Therefore, additional storage space needs to be set up at the entrance of the coating area outside the "n" shape. The entire powder coating production line occupies too much area and has a low space utilization rate.

[0006] It is evident that existing powder coating production lines are not suitable for powder coating of rods and there is still room for improvement. Summary of the Invention

[0007] The purpose of this invention is to provide a rod powder coating production line in order to solve the above-mentioned technical problems.

[0008] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0009] A composite rod powder coating production line. The production line includes loading and unloading stations, a powder coating chamber, and a curing chamber arranged sequentially along the conveying direction of an overhead conveyor. The conveying line of the overhead conveyor is a closed loop, specifically an L-shaped line. The loading and unloading stations are located on the short arm of the conveyor line, while the powder coating chamber and the curing chamber are located on the long arm. The conveyor line encloses a storage area, and a loading and unloading device is provided between the loading and unloading stations and the storage area. The overhead conveyor, the powder coating chamber, the curing chamber, and the loading and unloading device are all connected to an electrical control system. The loading and unloading device includes a suspended trolley, a ground rail trolley, and a lifting device. The suspended trolley is located above the overhead conveyor, and the ground rail trolley is located below the overhead conveyor. The suspended trolley is wider than the ground rail trolley. The rail-mounted trolley includes two parallel ground rails embedded in the ground and a trolley body that slides along the ground rails. The trolley body includes a base frame erected between the two ground rails, drive rollers located on the left and right sides of the bottom of the base frame, a drive motor for moving the drive rollers, and four lifting frames arranged symmetrically on the base frame. The lifting device includes a crossbar and crossbar hooks located on the left and right sides of the top of the crossbar, as well as multiple workpiece hooks located at the bottom of the crossbar. The crossbar hooks correspond to the lifting rings at the bottom of the suspended conveyor and the suspended trolley. The crossbar can be horizontally mounted on the top of the lifting frames, and the top of the lifting frames is provided with a groove to accommodate the crossbar. The opening of the crossbar hook faces away from the loading and unloading station.

[0010] Furthermore, the lifting frame includes an n-shaped fixed frame vertically mounted on the base frame, and an electric cylinder mounted inside the n-shaped fixed frame. The telescopic rod of the electric cylinder passes through the top of the n-shaped fixed frame and is connected to the vertical support frame. The groove is provided on the inner side of the top of the vertical support frame.

[0011] Furthermore, a fixing sleeve is provided at the top of the n-shaped fixing frame, and the vertical support frame is located inside the fixing sleeve.

[0012] Furthermore, an angle steel is provided between the inner side of the vertical support frame and the bottom of the groove, and an opening for accommodating the angle steel is provided on the inner side of the top of the fixing sleeve.

[0013] Furthermore, a cross-shaped support column and / or a straight support column are provided between the two fixed sleeves on the same side; a triangular stabilizing frame is provided on the left or right side of the bottom of the lifting frame; and a driven roller is provided at the middle position of the bottom of the base frame.

[0014] Furthermore, an entrance is provided at the rear of the powder coating chamber, an exit is provided at the front of the powder coating chamber, and a liftable powder coating mechanism is provided on the left and right side walls of the powder coating chamber. An infrared sensor is provided inside the powder coating chamber at the rear of the liftable powder coating mechanism, and a manual powder coating area is provided inside the powder coating chamber at the front of the liftable powder coating mechanism.

[0015] Furthermore, the curing chamber uses natural gas for direct heating and full hot air circulation to provide a heat source. Temperature measuring elements are installed on the inner wall of the curing chamber. Exhaust hoods are installed at the inlet and outlet of the curing chamber, and the exhaust hoods are connected to the waste gas treatment device.

[0016] Furthermore, the waste gas treatment device includes an exhaust duct, a spray adsorption device, a mechanical drying device, a photocatalytic oxidation device, an activated carbon adsorption device, and an exhaust fan connected in sequence.

[0017] Furthermore, a rack for storing poles is provided on the ground of the storage area.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) The production line has the loading and unloading device, which realizes the loading and unloading of the lifting device through the cooperation of the suspended trolley and the ground rail trolley. It has a high degree of automation and is suitable for large and heavy composite rods.

[0020] (2) The loading and unloading device uses the lifting device to carry the workpiece. The workpiece can be loaded from the lifting device in advance, and the unloading can be done after the workpiece has cooled down. This does not take up the loading and unloading time and improves work efficiency.

[0021] (3) The suspended trolley is wider than the ground rail trolley, so loading and unloading between the suspended trolley and the ground rail trolley is not affected;

[0022] (4) The conveying line of the overhead conveyor is arranged in an L-shape, and the storage area formed can be used to store the rods. The entire powder coating production line occupies a small area and has a high space utilization rate. Moreover, since the storage area is directly opposite the loading and unloading station, the location is reasonably arranged and loading and unloading are convenient. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0024] Figure 2 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0025] Figure 3 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0026] Figure 4 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0027] Figure 5 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0028] Figure 6 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0029] Figure 7 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0030] Figure 8 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0031] Figure 9 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0032] Figure 10 This is a schematic diagram illustrating the working principle of the loading and unloading device of a composite rod powder coating production line according to the present invention.

[0033] Figure 11 This is a top view schematic diagram of a combined rod powder coating production line according to the present invention;

[0034] Figure 12 This is a schematic diagram of the structure of the ground rail trolley body of the loading and unloading device of a combined rod powder coating production line according to the present invention.

[0035] Figure 13 This is a schematic diagram of the lifting frame of the loading and unloading device for a combined rod powder coating production line according to the present invention.

[0036] Figure 14 This is another structural schematic diagram of the lifting frame of the loading and unloading device of a combined rod powder coating production line according to the present invention;

[0037] Figure 15 This is a schematic diagram of the structure of the lifting device for the loading and unloading of a combined rod powder coating production line according to the present invention;

[0038] Figure 16 This is a top view of the powder coating chamber of a combined rod powder coating production line according to the present invention.

[0039] Figure 17 This is a schematic diagram of the structure of a waste gas treatment device for a composite powder coating production line according to the present invention.

[0040] Attached reference numerals: 1-Suspended conveyor; 2-Loading / unloading station; 3-Powder coating chamber; 4-Curing chamber; 5-Storage area; 6-Suspended crane; 7-Ground rail; 8-Ground rail crane body; 81-Base frame; 82-Drive roller; 83-Drive motor; 84-Lifting frame; 841-N-type fixed frame; 842-Electric cylinder; 843-Vertical support frame; 844-Fixing sleeve; 845-Cross-shaped support column; 846-Straight support column; 85-Gateway; 86-Angle steel; 87-Three 9-Angle stabilizing frame; 91-Hanging device; 92-Horizontal bar; 93-Horizontal bar hook; 10-Workpiece to be powder coated; 11-Powder coated and cured workpiece; 12-Liftable powder coating mechanism; 13-Infrared sensor; 14-Manual powder coating area; 15-Temperature measuring element; 16-Exhaust hood; 17-Waste gas treatment device; 171-Exhaust duct; 172-Spray adsorption device; 173-Photocatalytic oxidation device; 174-Activated carbon adsorption device; 175-Exhaust fan; 18-Collectible storage rack. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] Example 1

[0044] like Figures 1 to 15As shown, this embodiment provides a combined rod powder coating production line. The production line includes loading / unloading stations 2, a powder coating chamber 3, and a curing chamber 4 arranged sequentially along the conveying direction of the overhead conveyor 1. The conveying line of the overhead conveyor 1 is a closed loop, specifically an L-shaped line. The loading / unloading stations 2 are located on the short arm of the conveyor line, while the powder coating chamber 3 and curing chamber 4 are located on the long arm. The conveyor line encloses a storage area 5, and a loading / unloading device is installed between the loading / unloading stations 2 and the storage area 5. The overhead conveyor 1, powder coating chamber 3, curing chamber 4, and loading / unloading device are all connected to an electrical control system (not shown in the figure). The loading / unloading device includes a suspended trolley 6, a ground rail trolley, and a lifting device 9. The suspended trolley 6 is located above the overhead conveyor 1, and the ground rail trolley is located below the overhead conveyor 1. The suspended trolley 6 is wider than the ground rail trolley. The system includes two parallel ground rails 7 embedded in the ground and a ground rail carriage body 8 that slides along the ground rails 7. The ground rail carriage body 8 includes a base frame 81 erected between the two ground rails 7, active rollers 82 set on the left and right sides of the bottom of the base frame 81, a drive motor 83 that drives the active rollers 82 to move, and four lifting frames 84 set on the base frame 81 and arranged symmetrically in the front, back, left and right directions. The lifting device 9 includes a crossbar 91 and crossbar hooks 92 set on the left and right sides of the top of the crossbar 91 and multiple workpiece hooks 93 set at the bottom of the crossbar 91. The crossbar hooks 92 correspond to the lifting rings at the bottom of the suspended conveyor 1 and the suspended carriage 6. The crossbar 91 can be horizontally erected on the top of the lifting frame 84. The top of the lifting frame 84 is provided with a groove 85 to accommodate the crossbar 91.

[0045] Working principle: The loading and unloading device 6 transports the workpiece 10 to be powder coated stored in the storage area 5 to the loading and unloading station 2. Here, the workpiece 10 to be powder coated is hoisted onto the overhead conveyor 1 by the loading and unloading device 6. The overhead conveyor 1 carries the workpiece 10 to the powder coating chamber 3 for powder coating, and then to the curing chamber 4 for high-temperature curing. Subsequently, the overhead conveyor 1 carries the powder-coated and cured workpiece 11 away from the curing chamber 4 and returns to the loading and unloading station 2. The loading and unloading device 6 then takes the powder-coated and cured workpiece 11 from the overhead conveyor 1. After that, the loading and unloading device 6 carries the powder-coated and cured workpiece 11 to the storage area 5 and unloads it into the storage area 5.

[0046] The above production line has automated loading and unloading devices, which are suitable for large and heavy composite rods. In addition, since the conveying line of the overhead conveyor 1 is arranged in an L-shape, the enclosed storage area 5 can be used to store composite rods. The entire powder coating production line occupies a small area and has a high space utilization rate. Furthermore, since the storage area 5 is directly opposite the loading and unloading station 2, the location is reasonable and loading and unloading are convenient.

[0047] Specifically, the loading and unloading device uses a lifting device 9 to carry the workpiece. Loading of the workpiece from the lifting device 9 can be done in advance, while unloading can be performed after the workpiece has cooled down, without taking up loading and unloading time, thus improving work efficiency. The loading and unloading of the lifting device 9 is achieved through the cooperation of the overhead crane 6 and the ground rail crane, resulting in a high degree of automation, suitable for large and heavy composite rods. The overhead crane 6 is wider than the ground rail crane, so loading and unloading between the overhead crane 6 and the ground rail crane are not affected.

[0048] First, connect the horizontal hook 92 of the lifting device 9 to the lifting ring of the overhead crane 6, and then hang the workpieces 10 to be powder coated one by one onto the workpiece hook 93 of the lifting device 9. When loading and unloading are required, follow these steps:

[0049] (1) As Figure 1 As shown, the ground rail trolley is driven between the loading / unloading station 2 of the overhead trolley 6 and the overhead conveyor 1.

[0050] (2) Figure 2 As shown, the overhead crane 6 drives the lifting device 9 to move towards the loading and unloading station 2 of the overhead conveyor 1 until it reaches the top of the lifting frame 84 on the rear side of the ground rail crane. Then the lifting ring of the overhead crane 6 lowers the height, driving the lifting device 9 to also lower until it falls into the groove 85 at the top of the lifting frame 84.

[0051] (3) Figure 3 As shown, the lifting frame 84 at the rear of the ground rail trolley moves slightly upward, causing the lifting device 9 to rise and the crossbar hook 92 to separate from the lifting ring of the suspended trolley 6. The ground rail trolley then moves towards the loading / unloading station 2 of the suspended conveyor 1, causing the crossbar hook 92 of the lifting device 9 to completely separate from the lifting ring of the suspended trolley 6.

[0052] (4) Figure 4 As shown, the rear lifting frame 84 descends to the initial position, while the lifting ring of the suspended trolley 6 rises until it is higher than the lifting device 9, and then the suspended trolley 6 travels in the direction away from the loading and unloading station 2 of the suspended conveyor 1.

[0053] (5) Figure 5 As shown, the ground rail trolley moves to the loading and unloading station 2 of the overhead conveyor 1, and at the same time the overhead conveyor 1 moves to transfer the powder-coated and cured workpiece 11 out of the curing chamber 4 until it moves to the loading and unloading station 2 of the overhead conveyor 1, located in front of the ground rail trolley.

[0054] (6) Figure 6 As shown, the ground rail trolley moves towards the suspended trolley 6 until the front lifting frame 84 reaches directly below the lifting device 9 on the suspended transport vehicle 3, and then the front lifting frame 84 rises until the lifting device 9 falls into the groove 85 at the top of the lifting frame 84.

[0055] (7) Figure 7 As shown, the front lifting frame 84 moves slightly upward, causing the lifting device 9 to rise and separate the crossbar hook 92 from the lifting ring of the suspension trolley 6. The ground rail trolley then moves to the rear, causing the crossbar hook 92 of the lifting device 9 to completely disengage from the lifting ring of the suspension trolley 6. After that, the front lifting frame 84 descends to return to its initial height.

[0056] (8) Figure 8 As shown, the ground rail trolley moves forward until the rear lifting frame 84 moves to a position close to the suspended conveyor 1. Then the rear lifting frame 84 rises to the position corresponding to the hanging ring of the suspended conveyor 1. After that, the ground rail trolley moves forward until the crossbar hook 92 enters the hanging ring of the suspended conveyor 1. The rear lifting frame 84 then descends, and the lifting device 9 is hooked on the hanging ring of the suspended conveyor 1.

[0057] (9) such as Figure 9 As shown, the ground rail trolley travels towards the loading / unloading station 2 away from the overhead conveyor 1 until the front lifting frame 84 moves to a position close to the lower right of the overhead trolley 6 lifting ring. Then the front lifting frame 84 rises to the position corresponding to the overhead trolley 6 lifting ring. After that, the ground rail trolley moves forward until the crossbar hook 92 enters the overhead trolley 6 lifting ring. The front lifting frame 84 then descends, and the lifting device 9 is hooked on the overhead conveyor 1 lifting ring.

[0058] (10) such as Figure 10 As shown, the overhead crane 6 drives the hoist 9 to move away from the loading / unloading station 2 of the overhead conveyor 1 until it reaches the storage area 5. At the same time, the overhead conveyor 1 drives the workpiece 10 to be powder coated to the powder coating chamber 3 for powder coating.

[0059] After the powder-coated and cured workpiece has cooled, it is removed from the hanger 9. It should be noted that the above loading and unloading process is based on the orientation of the opening of the crossbar hook 92 towards the loading / unloading station 2 away from the overhead conveyor 1. It is understood that when the opening direction of the crossbar hook 92 is reversed, some steps of the loading and unloading process need to be slightly adjusted. Furthermore, when hanging composite rod accessories on the hanger 9, each composite rod accessory can be hung on a row of workpiece hooks 93 provided on the hanger 9; when hanging the composite rod body on the hanger 9, both ends of the composite rod body can be detachably connected to the workpiece hooks 93 at both ends of the hanger 9, and the middle workpiece hooks 93 can be temporarily removed to avoid scratching the composite rod body and affecting the powder coating effect.

[0060] It should be noted that the specific structure of the overhead crane 6 and the overhead conveyor 1 is not the focus of this invention, and can be set with reference to the prior art, and will not be described in detail here.

[0061] Furthermore, the overhead conveyor 1 is an accumulation overhead conveyor, which is particularly suitable for situations where the longitudinal dimension of the conveyed object is long and the lateral dimension is narrow. It helps to make full use of the available space, improve storage capacity, and shorten the length of the conveying line.

[0062] Furthermore, a combined storage rack 18 is installed on the ground of storage area 5.

[0063] Example 2

[0064] Based on Example 1, this example provides a detailed description of the specific structure of the lifting frame 84.

[0065] The lifting frame 84 includes an n-shaped fixed frame 841 vertically mounted on the base frame 81, and an electric cylinder 842 mounted inside the n-shaped fixed frame 841. The telescopic rod of the electric cylinder 842 passes through the top of the n-shaped fixed frame 841 and is connected to the vertical support frame 843. A groove 85 is provided on the inner side of the top of the vertical support frame 843.

[0066] Working principle: When the lifting device 9 is erected on top of the lifting frame 84 and needs to be hooked onto the lifting ring of the overhead crane 6 or the overhead conveyor 1, the telescopic rod of the electric cylinder 842 extends, lifting the vertical support frame 843 and the support groove 85, thereby driving the lifting device 9 to rise, and then continuing the lifting action of the lifting device 9. After the lifting device 9 is hooked onto the overhead crane 6 or the overhead conveyor 1, the telescopic rod of the electric cylinder 842 retracts, and the vertical support frame 843 and the support groove 85 fall back to their original positions. Although the lifting frame 84 provided in this embodiment can complete the corresponding operation, after repeatedly lifting heavy composite rods, the lifting frame 84 may become tilted, affecting subsequent lifting operations.

[0067] Example 3

[0068] Based on Example 1, this example provides a detailed description of another specific structure of the lifting frame 84.

[0069] The lifting frame 84 includes an n-shaped fixed frame 841 vertically mounted on a base frame 81, and an electric cylinder 842 disposed within the n-shaped fixed frame 841. The telescopic rod of the electric cylinder 842 passes through the top of the n-shaped fixed frame 841 and is connected to a vertical support frame 843. A groove 85 is provided on the inner side of the top of the vertical support frame 843. A fixing sleeve 844 is provided on the top of the n-shaped fixed frame 841, and the vertical support frame 843 is located inside the fixing sleeve 844.

[0070] Working principle: When the lifting device 9 is erected on top of the lifting frame 84 and needs to be hooked onto the lifting ring of the suspended trolley 6 or the suspended conveyor 1, the telescopic rod of the electric cylinder 842 extends, lifting the vertical support frame 843, which in turn drives the lifting device 9 to rise away from the rest 85. The lifting device 9 continues to be hoisted, but throughout the process, it remains within the rest 85 to prevent it from falling. After the lifting device 9 is hooked onto the suspended trolley 6 or the suspended conveyor 1, the telescopic rod of the electric cylinder 842 retracts, and the vertical support frame 843 falls back to its original position. The n-type fixing frame 841 serves to fix the electric cylinder 842. The fixing sleeve 844 is fixed to the n-type fixing frame 841, protecting and positioning the vertical support frame 843 to prevent it from tilting during the ascent, which would affect the hoisting of the lifting device 9. The rest 85 is used to support the lifting device 9, providing stable support as it moves with the ground rail trolley.

[0071] Furthermore, an angle steel 86 is provided between the inner side of the vertical support frame 843 and the bottom of the groove 85 to reinforce the groove 85, making the support of the groove 85 more stable. An opening for accommodating the angle steel 86 is provided on the inner side of the top of the fixing sleeve 844, which facilitates the raising and lowering of the vertical support frame 843, the angle steel 86, and the crossbar 91.

[0072] Furthermore, a cross-shaped support column 845 and / or a straight support column 846 are provided between the two fixed sleeves 844 on the same side to reinforce the lifting frame 84 and prevent the lifting frame 84 from tilting and affecting the hanging of the lifting device 9.

[0073] Furthermore, a triangular stabilizing frame 87 is provided on the left or right side of the bottom of the lifting frame 84 to reinforce the lifting frame 84 and prevent the lifting frame 84 from tilting and affecting the hanging of the lifting device 9.

[0074] Furthermore, a driven roller (not shown) is provided at the middle position of the bottom of the base frame 81. Since the base frame 81 is relatively wide, the driven roller can support the middle position of the base frame 81 and prevent the middle of the base frame 81 from collapsing.

[0075] Example 4

[0076] Based on Example 1, this example provides a detailed description of the specific structure of the powder coating chamber 3.

[0077] like Figure 16 As shown, an entrance is provided on the rear side of the powder coating chamber 3, an exit is provided on the front side of the powder coating chamber 3, a channel is provided on the top of the powder coating chamber 3 to accommodate the passage of the suspended conveyor 1, a liftable powder coating mechanism 12 is provided on the left and right side walls of the powder coating chamber 3, an infrared sensor 13 is provided inside the powder coating chamber 3 behind the liftable powder coating mechanism 12, and a manual powder coating area 14 is provided inside the powder coating chamber 3 in front of the liftable powder coating mechanism 12.

[0078] Working principle: The overhead conveyor 1 carries the workpiece 10 to be powder coated into the powder coating chamber 3 through the channel. The overhead conveyor 1 is located at the top of the powder coating chamber 3, and the workpiece 10 to be powder coated is located inside the powder coating chamber 3. When the infrared sensor 13 senses the workpiece 10 to be powder coated, the lifting powder coating mechanism 12 starts the powder coating work. The lifting powder coating mechanism 12 moves up and down while powder coating, which helps to improve the uniformity of powder coating. When the infrared sensor 13 no longer senses the workpiece 10 to be powder coated, the lifting powder coating mechanism 12 stops working.

[0079] Example 5

[0080] Based on Example 1, this example provides a detailed description of the specific structure of the curing chamber 4.

[0081] The curing chamber 4 uses natural gas for direct heating and full hot air circulation to provide heat source. Temperature measuring element 15 is installed on the inner wall of the curing chamber 4. Exhaust hoods 16 are installed at the inlet and outlet of the curing chamber 4 and are connected to the exhaust gas treatment device 17.

[0082] The function of the exhaust gas treatment device 17 is to treat the volatiles generated during the powder curing process. The exhaust gas treatment device 17 includes an exhaust duct 171, a spray adsorption device 172, a photocatalytic oxidation device 173, an activated carbon adsorption device 174, and an exhaust fan 175 connected in sequence.

[0083] The gas collected in the solidification chamber 4 first passes through a spray adsorption device, where water spraying adsorbs and cools the substances in the waste gas, pre-treating it for subsequent waste gas treatment. Then, the waste gas passes through a photocatalytic oxidation device 173, which uses UV ultraviolet technology to generate ozone and free active oxygen ions. High-energy ultraviolet light breaks down molecular bonds and promotes synergistic decomposition and oxidation reactions to remove organic pollutants. Afterward, the waste gas passes through an activated carbon adsorption device 174. Activated carbon is a porous carbonaceous material with a highly developed pore structure. This porous structure provides a large surface area, allowing for full contact with the gas (impurities), thus giving activated carbon its unique adsorption properties, making it very easy to absorb harmful impurities. After the waste gas treatment meets the standards, it is discharged at a height of 15m.

Claims

1. A composite rod powder coating production line, comprising loading and unloading stations, a powder coating chamber, and a curing chamber arranged sequentially along the conveying direction of an overhead conveyor, wherein the conveying line of the overhead conveyor is a closed loop, characterized in that, The conveyor line is L-shaped, with the loading and unloading stations located on the short arm of the conveyor line, and the powder coating chamber and the curing chamber located on the long arm of the conveyor line. The conveyor line encloses a storage area, and a loading and unloading device is installed between the loading and unloading stations and the storage area. The overhead conveyor, the powder coating chamber, the curing chamber, and the loading and unloading device are all connected to an electrical control system. The loading and unloading device includes a suspended trolley, a ground rail trolley, and a lifting device. The suspended trolley is located above the overhead conveyor, and the ground rail trolley is located below the overhead conveyor. The suspended trolley is wider than the ground rail trolley. The ground rail trolley includes two parallel ground rails embedded in the ground and a sliding mechanism along the ground rails. The trolley body includes a base frame erected between two ground rails, active rollers on the left and right sides of the bottom of the base frame, a drive motor for moving the active rollers, and four lifting frames symmetrically arranged on the base frame. The lifting device includes a crossbar, crossbar hooks on the left and right sides of the top of the crossbar, and multiple workpiece hooks at the bottom of the crossbar. The crossbar hooks correspond to the lifting rings at the bottom of the suspended conveyor and the suspended trolley. The crossbar can be horizontally mounted on the top of the lifting frames, and the top of the lifting frames is provided with a groove to accommodate the crossbar. The opening of the crossbar hook faces away from the loading and unloading station. The lifting frame includes an n-shaped fixed frame vertically mounted on the base frame, and an electric cylinder mounted inside the n-shaped fixed frame. The telescopic rod of the electric cylinder passes through the top of the n-shaped fixed frame and is connected to the vertical support frame. The groove is provided on the inner side of the top of the vertical support frame. The top of the n-shaped fixing frame is provided with a fixing sleeve, and the vertical support frame is located inside the fixing sleeve; An angle steel is provided between the inner side of the vertical support frame and the bottom of the groove, and an opening for accommodating the angle steel is provided on the inner side of the top of the fixing sleeve. A cross-shaped support column and / or a straight support column are provided between the two fixed sleeves on the same side; a triangular stabilizing frame is provided on the left or right side of the bottom of the lifting frame; a driven roller is provided at the middle position of the bottom of the base frame; An entrance is provided at the rear of the powder coating chamber, an exit is provided at the front of the powder coating chamber, and a liftable powder coating mechanism is provided on the left and right side walls of the powder coating chamber. An infrared sensor is provided inside the powder coating chamber behind the liftable powder coating mechanism, and a manual powder coating area is provided inside the powder coating chamber in front of the liftable powder coating mechanism. The curing chamber uses natural gas for direct heating and full hot air circulation to provide a heat source. Temperature measuring elements are installed on the inner wall of the curing chamber. Exhaust hoods are installed at the inlet and outlet of the curing chamber, and the exhaust hoods are connected to the waste gas treatment device. The waste gas treatment device includes an exhaust duct, a spray adsorption device, a mechanical drying device, a photocatalytic oxidation device, an activated carbon adsorption device, and an exhaust fan connected in sequence. The storage area is equipped with a rack for storing poles.

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