A steel structure product paint spraying system
By designing a painting system for steel structure products and employing multi-stage filtration and catalytic combustion equipment to treat paint mist and VOCs during the painting process, the problems of air filtration and VOCs emissions in the paint booth have been solved, achieving efficient painting and environmentally friendly production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TUOFU (QINGYUN) NEW MATERIALS CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-06-26
AI Technical Summary
Existing paint booths lack effective air filtration and circulation systems, making it impossible to effectively control paint mist concentration, which affects the air quality of the working environment. Furthermore, VOCs are emitted directly without adequate treatment, leading to environmental pollution.
A steel structure product painting system was designed, including a conveying mechanism, a spraying chamber, a baking chamber, and an exhaust gas treatment system. It is equipped with a multi-stage filtration structure, catalytic combustion equipment, and an adsorption purification unit to achieve efficient air filtration and exhaust gas treatment. Combined with an automated spraying device and a heating device, it ensures coating uniformity and environmental protection.
Effectively control the paint mist concentration during the spraying process, maintain good working environment air quality, significantly reduce VOC emissions, improve spraying efficiency and coating thickness consistency, reduce quality fluctuations, and reduce environmental pollution.
Smart Images
Figure CN224405526U_ABST
Abstract
Description
Technical Field
[0001] This utility model applies to the field of surface treatment technology for steel structure products, and particularly relates to a painting system for steel structure products. Background Technology
[0002] Surface treatment is a crucial step in the manufacturing process of steel structure products, affecting not only their appearance but also their corrosion resistance and lifespan. Traditional steel structure product painting systems typically include manual spraying, simple spray booths, and natural drying. However, these existing systems have several drawbacks:
[0003] Existing spray booths lack effective air filtration and circulation systems, making it impossible to effectively control paint mist concentration. This not only affects the air quality of the working environment but may also cause paint mist to deposit on undried paint surfaces, impacting the final coating effect. Furthermore, inadequate waste gas treatment measures result in large amounts of volatile organic compounds (VOCs) being directly emitted into the atmosphere without sufficient treatment, causing serious environmental pollution.
[0004] To solve the above-mentioned technical problems, this utility model designs a painting system for steel structure products. Utility Model Content
[0005] This utility model provides a painting system for steel structure products, which aims to solve the problems of insufficient air filtration and circulation systems in existing paint booths and failure to meet VOC emission standards.
[0006] A steel structure product painting system includes a conveying mechanism, a spraying chamber, a baking chamber, and an exhaust gas treatment system; the conveying mechanism passes through the spraying chamber and the baking chamber in sequence to form a continuous conveying path; the spraying chamber is equipped with a spraying device; the baking chamber is equipped with a heating device for drying the sprayed steel structure product; the exhaust gas treatment system is connected to the exhaust end of the spraying chamber and includes a dry filtration unit, a catalytic combustion device, an adsorption purification unit, a fan, and an aerial exhaust pipe connected in sequence.
[0007] Based on the above technical solution, the dry filtration unit is a multi-stage filtration structure, including a primary filter cotton or a cartridge filter.
[0008] Based on the above technical solution, the catalytic combustion device includes a heat exchanger, a catalytic reaction chamber, and an electric heating component; the inlet of the heat exchanger is connected to the exhaust end of the dry filter unit, the outlet of the heat exchanger is connected to the electric heating component, and the end of the electric heating component away from the heat exchanger is connected to the catalytic reaction chamber.
[0009] Based on the above technical solution, the spraying device includes a guide rail parallel to the conveying mechanism, and a spraying robot is slidably connected on the guide rail.
[0010] Beneficial effects
[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. This utility model is equipped with a high-efficiency air filtration system, a ventilation device, and an advanced exhaust gas treatment system, which can effectively control the paint mist concentration during the spraying process, maintain good working environment air quality, and fully treat volatile organic compounds (VOCs), significantly reducing environmental pollution. 2. By setting spraying chambers and automated spraying devices on both sides of the conveying mechanism, uniform double-sided spraying of steel structure products can be achieved in a single pass. This not only improves spraying efficiency but also ensures the consistency of coating thickness and the stability of surface quality, reducing quality fluctuations caused by manual operation. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.
[0013] Figure 1 : A schematic diagram of the structure of this utility model;
[0014] Figure 2 : A schematic diagram of the structure of the waste gas treatment system described in this utility model;
[0015] Figure 3 : A schematic diagram of the structure of the spraying device of this utility model;
[0016] Figure 4 : A schematic diagram showing the location of the air filtration system and the room body described in this utility model. Detailed Implementation
[0017] The present invention will be further described below with reference to the accompanying drawings and examples:
[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0021] like Figure 1 As shown, a steel structure product painting system includes a conveying mechanism 1, a spraying chamber 2, a baking chamber 3, and an exhaust gas treatment system. The conveying mechanism 1 sequentially passes through the spraying chamber 2 and the baking chamber 3 to form a continuous conveying path. The steel structure product is transported on the conveying mechanism 1, and the entire processing from spraying to drying can be completed in a continuous process. No manual intervention or workpiece movement is required, greatly reducing time losses in intermediate steps and improving the overall efficiency of the production line.
[0022] like Figure 3 As shown, a spraying device is installed inside the spraying chamber 2; the spraying device includes a guide rail 71 parallel to the conveying mechanism 1, and a spraying robot 72 is slidably connected on the guide rail 71.
[0023] Gears are installed on the guide rail 71, and a motor is mounted on the mounting base of the painting robot 72. The motor output is connected to a gear, which meshes with the gears on the guide rail, thereby enabling the painting robot to move. Through the precise engagement of the gears and teeth, high-precision movement and positioning of the painting robot 72 can be achieved. Compared with other types of drive methods such as belt drives, rack and pinion drives can provide higher position control accuracy, ensuring the consistency and accuracy of the painting operation.
[0024] like Figure 2 As shown, the exhaust gas treatment system is connected to the exhaust end of the spraying chamber 2 and includes a dry filter unit 41, a catalytic combustion device 43, an adsorption purification unit, a fan 44 and an aerial exhaust pipe 45 connected in sequence.
[0025] The dry filtration unit 41 is a multi-stage filtration structure, including at least one primary filter cotton or cartridge filter. It can effectively remove large particulate matter and some volatile organic compounds (VOCs) from exhaust gas. Multi-stage filtration not only improves the capture efficiency of pollutants of different particle sizes but also extends the service life of subsequent treatment equipment.
[0026] The adsorption purification unit includes a first adsorption chamber 421 and a second adsorption chamber 422, used for alternating adsorption and desorption regeneration operations. By configuring two adsorption chambers, adsorption can be performed in one chamber while desorption and regeneration are carried out in the other. The system can continuously treat waste gas without stopping for adsorbent regeneration or replacement, thus ensuring the continuity and stability of production.
[0027] The catalytic combustion device 43 includes a heat exchanger, a catalytic reaction chamber, and an electric heating component. The inlet of the heat exchanger is connected to the exhaust end of the dry filter unit 41, and the outlet of the heat exchanger is connected to the electric heating component. The end of the electric heating component furthest from the heat exchanger is connected to the catalytic reaction chamber. The heat exchanger in the catalytic combustion device 43 can preheat the incoming low-temperature exhaust gas using the high-temperature purified gas discharged from the catalytic reaction chamber, thereby reducing the energy consumption of the electric heating component. This method achieves effective energy recovery, reduces overall energy consumption, and meets the requirements of energy conservation and environmental protection.
[0028] For waste gas treatment, the waste gas first undergoes preliminary purification through a dry filter unit 41 to remove large particulate pollutants and other impurities. The pre-purified waste gas then enters the heat exchanger section of the catalytic combustion device 43. There, the waste gas comes into contact with the high-temperature purified gas exiting the catalytic reaction chamber, utilizing the heat carried by the latter to preheat the waste gas and increase its temperature. After leaving the heat exchanger, the preheated waste gas enters an electric heating component. If the waste gas temperature has not yet reached the activation temperature required by the catalyst, the electric heating component further heats the waste gas to ensure it reaches the appropriate reaction temperature. Once the reaction temperature is reached, the waste gas then enters the catalytic reaction chamber and comes into contact with the catalyst surface. The catalyst lowers the activation energy of the reaction, allowing VOCs in the waste gas to be rapidly oxidized and decomposed into carbon dioxide and water vapor at a relatively low temperature. The purified gas after treatment in the catalytic reaction chamber contains few or no harmful substances. This gas can be returned to the heat exchanger as part of the heat source to recover waste heat, then further treated by an adsorption purification unit, and finally safely discharged into the atmosphere via a fan 44 and an elevated exhaust pipe 45.
[0029] The spraying chamber 2 includes a chamber body 21, an air filtration system 22, an air supply device, and an electrical control system; the chamber body consists of a frame welded from galvanized square tubes, wall panels, and a safety door; the air supply device is installed inside the spraying chamber 2 and is connected to the air filtration system and the exhaust gas treatment system.
[0030] The frame of the spray booth (model 21) is constructed from 80*80*2mm square tubing, meeting the load-bearing requirements of the booth and the workpiece. The wall panels are made of 100mm thick rock wool composite board with a density of 100 kg / m³. The inner steel plate is 0.4mm galvanized steel, and the outer steel plate is 0.4mm color steel. The galvanized square tubing frame ensures the overall strength and stability of the spray booth. The thick rock wool and color steel composite board provides excellent thermal insulation and fire resistance, while effectively isolating external noise and temperature fluctuations, providing a relatively stable working environment. An air-source heat pump electric heating unit is located on the side of the booth, housing a heat conversion device and a hot air circulation fan.
[0031] The frame of the curing chamber is welded from 80*80*2mm square tubing, and a bridge-type structure supports the weight of the curing chamber. An air curtain is installed above the entrance and exit doors. When the conveyor mechanism 1 is set as a hanging rail, the gutter is 150mm wide to facilitate the movement of the overhead wire rope, and a soft and durable silicone baffle is provided to prevent the leakage of high-temperature gas and paint mist.
[0032] The spraying chambers 2 and spraying devices are configured as two, located on either side of the conveying mechanism 1. This allows for double-sided spraying of steel structure products in a single pass. This significantly reduces the time required for workpiece flipping or secondary processing, thereby greatly improving spraying efficiency. The two spraying chambers 2 are connected to an exhaust gas treatment system via pipelines.
[0033] like Figure 4 As shown, in some embodiments, the air filtration system 22 and the chamber 21 are respectively located on both sides of the conveying mechanism 1. This allows for better planning of the air intake and exhaust paths, ensuring uniform airflow distribution within the spray booth. This helps to create a stable laminar flow environment, reducing paint mist diffusion and deposition, and improving spraying quality.
[0034] The spray booth is equipped with an air filtration system and a ventilation device. The air filtration system ensures good air quality during the spraying process and prevents paint mist from spreading and affecting the environment. An exhaust gas treatment system is connected to the spray booth; exhaust gas first enters a dry filtration unit 41 for preliminary purification, removing large particulate impurities. The ventilation device includes a centrifugal fan and a connected duct system, which is located at the top of the spray booth and has multiple air outlets. The air filtration system is existing equipment available to those skilled in the art and will not be described in detail.
[0035] The paint baking chamber 3 is equipped with a heating device 5 for drying the sprayed steel structure products; the heating device 5 of the paint baking chamber 3 is an air-source heat pump heating device.
[0036] It also includes an automatic control system, including a temperature sensor and a central controller. The temperature sensor is installed inside the paint baking chamber 3. The central controller connects the temperature sensor to the air source heating device. The temperature sensor monitors the temperature inside the paint baking chamber 3 in real time and feeds it back to the central controller. The central controller dynamically adjusts the heat output of the air source heating device to ensure that the temperature inside the paint baking chamber is always maintained within an ideal range.
[0037] Air source heat pumps are a highly efficient heating method that utilizes ambient heat energy. Compared to traditional electric or gas heating methods, they can reach the required drying temperature more quickly and provide more heat with the same energy consumption.
[0038] During operation, the steel structure products are first placed on conveyor mechanism 1, which runs through the entire system, including spraying chamber 2 and baking chamber 3, forming a continuous conveying path. Conveyor mechanism 1 is responsible for smoothly transporting the products to be sprayed from the system's inlet to the outlet, ensuring that each step is carried out in an orderly manner.
[0039] When the product enters the spraying chamber 2, the spraying devices located on both sides of the conveying mechanism 1 begin to operate. These spraying devices are mounted on guide rails 71 parallel to the conveying mechanism, and each spraying device is equipped with a spraying robot 72. The spraying robot can slide on the guide rails to achieve full coverage spraying of the product.
[0040] After preliminary purification, the exhaust gas enters the catalytic combustion device 43, which includes a heat exchanger, a catalytic reaction chamber, and an electric heating component. After being preheated in the heat exchanger, the exhaust gas reaches the temperature required for the catalytic reaction with the assistance of the electric heating component. Then, it enters the catalytic reaction chamber, where it undergoes oxidative decomposition under the action of a catalyst, transforming into harmless substances such as carbon dioxide and water vapor.
[0041] The treated gas continues to pass through the adsorption purification unit, where the first adsorption box 421 and the second adsorption box 422 alternately perform adsorption and desorption regeneration operations to further purify the residual harmful substances in the waste gas. Finally, the purified gas is pressurized by the fan 44 and discharged into the atmosphere through the high-altitude exhaust pipe 45.
[0042] The coated steel structure products are then transported to the paint drying chamber 3, where an air-source heating device 5 is installed to dry and cure the coated steel structure products.
[0043] Temperature sensors are installed inside the paint baking chamber to monitor temperature changes in real time and feed the data back to the central controller. The central controller dynamically adjusts the heat output of the air source heating device according to the set target temperature, ensuring that the temperature inside the chamber is always kept within the optimal range, promoting rapid and uniform drying and curing of the coating.
[0044] It should be noted that the air-source heating device, catalytic combustion equipment, and spraying robot in this embodiment are all general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0045] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.
Claims
1. A painting system for steel structure products, characterized in that: It includes a conveying mechanism (1), a spraying chamber (2), a baking chamber (3), and an exhaust gas treatment system; the conveying mechanism (1) passes through the spraying chamber (2) and the baking chamber (3) in sequence to form a continuous conveying path; the spraying chamber (2) is equipped with a spraying device; the baking chamber (3) is equipped with a heating device (5) for drying the sprayed steel structure products; the exhaust gas treatment system is connected to the exhaust end of the spraying chamber (2) and includes a dry filter unit (41), a catalytic combustion device (43), an adsorption purification unit, a fan (44), and an high-altitude exhaust pipe (45) connected in sequence.
2. The steel structure product painting system according to claim 1, characterized in that: The dry filtration unit (41) is a multi-stage filtration structure, including a primary filter cotton or a cartridge filter.
3. The steel structure product painting system according to claim 1, characterized in that: The catalytic combustion device (43) includes a heat exchanger, a catalytic reaction chamber, and an electric heating component; the inlet of the heat exchanger is connected to the exhaust end of the dry filter unit (41), the outlet of the heat exchanger is connected to the electric heating component, and the end of the electric heating component away from the heat exchanger is connected to the catalytic reaction chamber.
4. A painting system for steel structure products according to claim 1, characterized in that... The spraying device includes a guide rail (71) parallel to the conveying mechanism (1), and a spraying robot (72) is slidably connected on the guide rail (71).
5. A painting system for steel structure products according to claim 1, characterized in that: The spraying chamber (2) includes a chamber body (21), an air filtration system (22), an air supply device, and an electrical control system; the chamber body is composed of a frame welded from galvanized square tubes, wall panels, and a safety door; the air supply device is located inside the spraying chamber (2) and is connected to the air filtration system and the exhaust gas treatment system.
6. A painting system for steel structure products according to claim 5, characterized in that: The spraying chamber (2) and the spraying device are configured as two, located on both sides of the conveying mechanism (1).
7. A steel structure product painting system according to claim 1, characterized in that: The heating device (5) of the paint baking chamber (3) is an air-source heating device.
8. A steel structure product painting system according to claim 7, characterized in that: It also includes an automatic control system, including a temperature sensor and a central controller. The temperature sensor is installed inside the paint baking chamber (3). The central controller connects the temperature sensor to the air-source heating device. The temperature sensor monitors the temperature inside the paint baking chamber (3) in real time and feeds it back to the central controller. The central controller dynamically adjusts the heat output of the air-source heating device.
9. A painting system for steel structure products according to claim 1, characterized in that: The adsorption purification unit includes a first adsorption box (421) and a second adsorption box (422), which are used to alternately perform adsorption and desorption regeneration operations.
10. A steel structure product painting system according to claim 5, characterized in that: The air supply device includes a centrifugal fan and a connected air duct system. The air duct system is located at the top of the spray booth and has multiple air outlets.