A steel structure product processing system

Abstract

This utility model relates to the field of steel structure product processing technology, and provides a steel structure product processing system, including a circulating track mechanism, a spraying device, an exhaust gas treatment system, an air source heat pump, and a control system; the circulating track mechanism includes a product transfer section and an empty return section, the product transfer section sequentially passing through a feeding hopper, a spraying hopper, a baking hopper, and an unloading hopper; a transfer unit is movably connected to the circulating track mechanism, the transfer unit being used to carry steel structure products and move along the product transfer section; the spraying device is set inside the spraying hopper, the spraying device including a guide rail and a spraying robot slidably connected to the guide rail; the exhaust gas treatment system is connected to the exhaust end of the spraying hopper, including a dry filtration unit, a catalytic combustion device, and an adsorption purification unit sequentially connected; the air source heat pump is connected to the baking hopper.

Description

Technical Field

[0001] This utility model applies to the field of steel structure product processing technology, and in particular relates to a steel structure product processing system. Background Technology

[0002] In current industrial production, steel structure products are highly favored due to their high strength, durability, and wide range of applications. However, traditional steel structure product processing systems have a series of shortcomings that limit further improvements in production efficiency and product quality.

[0003] Traditional steel structure product processing systems typically consist of independently operating feeding, spraying, baking, and unloading processes. Material handling between these processes relies primarily on manual labor or simple mechanized equipment. This not only increases labor costs but also easily creates bottlenecks in the production process, impacting overall production efficiency. Furthermore, the lack of an effective automated control system results in poor coordination and continuity between processes, leading to extended production cycles and an inability to meet rapid market demands.

[0004] Especially in the spraying process, traditional methods often employ manual or semi-automatic spraying. This approach makes it difficult to ensure consistent coating thickness and uniform surface treatment, easily leading to problems such as missed areas and overspray, wasting paint and reducing the product's appearance quality. Furthermore, the large amounts of volatile organic compounds (VOCs) generated during the spraying process, if not effectively treated, will cause serious environmental pollution and may harm workers' health.

[0005] To solve the above-mentioned technical problems, this utility model designs a steel structure product processing system. Utility Model Content

[0006] This utility model provides a steel structure product processing system, which aims to solve the technical problems of poor coordination between processes, low production efficiency and insufficient environmental protection in traditional steel structure product processing systems.

[0007] A steel structure product processing system includes a circulating track mechanism, a spraying device, an exhaust gas treatment system, an air source heat pump, and a control system;

[0008] The circulating track mechanism includes a product transfer section and an empty return section. The product transfer section sequentially passes through the feeding hopper, spraying hopper, baking hopper, and discharging hopper. A transfer unit is movably connected to the circulating track mechanism, which carries the steel structure product and moves it along the product transfer section. The spraying device is located inside the spraying hopper and includes a guide rail and a spraying robot slidably connected to the guide rail. The exhaust gas treatment system is connected to the exhaust end of the spraying hopper and includes a dry filtration unit, a catalytic combustion device, and an adsorption purification unit connected in sequence. The air source heat pump is connected to the baking hopper. The control system connects the circulating track mechanism, the spraying robot, the exhaust gas treatment system, and the air source heat pump to coordinate the continuous operation of the transfer, spraying, and drying processes.

[0009] Based on the above technical solution, the circulating track mechanism is a hanging track mechanism, including a frame and a circular track, and the transfer unit is an electric hoist and a detachable hook, with the steel structure product suspended on the detachable hook.

[0010] Based on the above technical solution, the top of the feeding hopper, spraying hopper, baking hopper and discharging hopper are all provided with sliding grooves, and the electric hoist is slidably connected to the sliding grooves.

[0011] Based on the above technical solution, the circulating track mechanism is a ground track mechanism, including a ground track transfer track and a ground track return track arranged in parallel, and the transfer unit is a support frame; the two ends of the ground track transfer track are connected to the ground track return track through ground track connecting rails, and a sliding frame is slidably connected on the ground track connecting rails, and the support frame is movably arranged on the sliding frame.

[0012] Beneficial effects

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. By adopting a circulating track mechanism, efficient flow of steel structure products between the feeding, spraying, baking, and unloading processes is achieved. This design reduces manual intervention and handling time, lowers labor costs, and solves the bottleneck problems that may occur in traditional systems, making the entire production line smoother and improving overall production efficiency. 2. The introduction of the exhaust gas treatment system, especially the effective combination of dry filtration units, catalytic combustion equipment, and adsorption purification units, can treat volatile organic compounds generated during the spraying process, greatly reducing environmental pollution. 3. The application of air source heat pumps not only provides an efficient drying solution but also dynamically adjusts the operating mode according to actual needs, optimizes energy use, reduces energy consumption, and demonstrates good energy-saving effects. Attached Figure Description

[0014] 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.

[0015] Figure 1 : A schematic diagram of the processing system structure when the circulating track mechanism of this utility model is a segmented composite track;

[0016] Figure 2 : A schematic diagram of the processing system structure when the circulating track mechanism described in this utility model is a ground track mechanism;

[0017] Figure 3 : A schematic diagram of the structure of the suspension rail mechanism described in this utility model;

[0018] Figure 4 The schematic diagram of the transfer unit structure of the circulating track mechanism described in this utility model is a suspended track mechanism;

[0019] Figure 5 This utility model describes a circular track mechanism, specifically a ground track mechanism.

[0020] Figure 6 : A diagram showing the positional relationship between the ground rail connecting rail and the sliding frame described in this utility model;

[0021] Figure 7 : A schematic diagram of the segmented composite track of this utility model;

[0022] Figure 8 : Positional relationship diagram of the electric hoist described in this utility model;

[0023] Figure 9 : A schematic diagram of the structure of the waste gas treatment system described in this utility model;

[0024] Figure 10 : A schematic diagram of the structure of the spraying device described in this utility model;

[0025] Figure 11 : A diagram showing the positional relationship of the spraying chamber described in this utility model;

[0026] Figure 12 : Schematic diagram of the air source heat pump described in this utility model. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and examples:

[0028] 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.

[0029] 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.

[0030] 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.

[0031] A steel structure product processing system includes a circulating track mechanism 1, a spraying device, an exhaust gas treatment system 3, an air source heat pump 4, and a control system.

[0032] The circulating track mechanism 1 includes a product transfer section and an empty return section. The product transfer section passes through the feeding bin 51, the spraying bin 52, the baking bin 53 and the discharging bin 54 in sequence. A transfer unit is movably connected to the circulating track mechanism. The transfer unit is used to carry the steel structure product 9 and move it along the product transfer section.

[0033] like Figure 10 As shown, the spraying device is installed inside the spraying chamber 52. The spraying device includes a guide rail 201 and a spraying robot 202 slidably connected to the guide rail. A rack is installed on the guide rail 201, and a motor is installed on the mounting base of the spraying robot 202. The output end of the motor is connected to a gear, which meshes with the rack on the guide rail, thereby realizing the movement of the spraying robot. Through the precise cooperation of the gear and rack, high-precision movement and positioning of the spraying robot 202 can be achieved. Compared with other types of drive methods such as belt drive, gear and rack drive can provide higher position control accuracy, ensuring the consistency and accuracy of the spraying operation.

[0034] The control system connects the circulating track mechanism 1, the spraying robot 202, the exhaust gas treatment system 3, and the air source heat pump 4, coordinating the continuous operation of the transfer, spraying, and drying processes.

[0035] The circulating track mechanism 1 can be a suspended track mechanism, a ground track mechanism, or a segmented composite track.

[0036] like Figure 3 and Figure 4 As shown, the circulating track mechanism 1 is a suspended track mechanism, which includes a frame 11 and a ring track 12 mounted on the frame 11. The transfer unit is slidably connected to the ring track 12, as shown. Figure 3 As shown, the transfer unit consists of an electric hoist 21 and a detachable hook 22 suspended below it, with the steel structure product 9 hung on the detachable hook 22. The electric hoist 21 and the detachable hook 22 allow for easy hanging, transfer, or unloading of the steel structure product, making it suitable for handling products of different sizes and weights.

[0037] The electric hoist can be composed of a motor, reducer, drum, wire rope or chain, etc. In this invention, the electric hoist not only has vertical lifting capability, but also can move horizontally along the circular track 12. The electric hoist is a device well known to those skilled in the art, and therefore will not be described in detail here.

[0038] The overhead rail mechanism moves the steel structure product 9 via suspension, effectively utilizing the space above the factory building and reducing the floor space occupied by ground equipment. This helps optimize the workshop layout and leaves more floor space for other operations.

[0039] The tops of the feeding hopper 51, spraying hopper 52, baking hopper 53, and discharging hopper 54 are all provided with sliding grooves, and the electric hoist 21 is slidably connected to the sliding grooves. Through the design of the sliding grooves, the electric hoist 21 can move precisely laterally within multiple functional hoppers. This allows the steel structure product to be accurately positioned to the specific location requiring processing or treatment. The sliding grooves provide a stable guiding path for the electric hoist 21, avoiding safety hazards caused by track deviation or instability.

[0040] During operation, at the starting point of the production line, the unprocessed steel structure product 9 is loaded onto the transfer unit via a workpiece handover station. Specifically, workers or automated equipment hang the steel structure product 9 on a detachable hook 22 below an electric hoist 21, such as an electric hoist.

[0041] After the steel structure product 9 is installed, the electric hoist begins to move along the circular track 12 set on the frame 11. This track is designed as a closed loop to ensure that the product can pass through each functional compartment according to the predetermined path.

[0042] As the electric hoist moves along the product transfer section of the circular track, steel structure product 9 passes through multiple functional compartments (feed compartment 51, spraying compartment 52, baking compartment 53, and discharge compartment 54). Each functional compartment has a chute at the top to ensure stable entry and exit of the electric hoist and to process the steel structure product accordingly. After steel structure product 9 completes all necessary processing steps, the electric hoist carries it to the workpiece handover station on the production line, transferring it to the external unloading process, ready for the next production stage or direct transport. The electric hoist then returns to its initial position along the unloaded return section, allowing it to be reused within the circular track.

[0043] like Figure 5 and Figure 6 As shown, the circulating track mechanism 1 can be a ground track mechanism, including a ground track transfer track 16 and a ground track return track 17 arranged in parallel. By setting two parallel tracks, one for forward transportation of steel structure products 9 and the other for empty return, continuous material flow is realized, improving the efficiency of the entire production line.

[0044] The ground rail transfer rail 16 is provided with ground rail connecting rails 18 at both ends. A sliding frame 181 is slidably connected to the ground rail connecting rail 18. The transfer unit is a carrier frame 182. The carrier frame 182 is slidably connected to the sliding frame 181. The sliding frame 181 moves on the ground rail connecting rail 18 to realize the switching of the steel structure product 9 between the ground rail transfer rail 16 and the ground rail return rail 17.

[0045] Conveying rollers are installed on the ground rail transfer rail 16, ground rail return rail 17, and ground rail connecting rail 18. The support frame 182 is placed on the conveying rollers and moves along them. Each conveying roller or a group of conveying rollers is connected to one or more drive motors. These motors provide power, enabling the conveying rollers to rotate. A control system is also installed on the conveying rollers to coordinate the operation of each drive motor, ensuring that the conveying rollers can run at a predetermined speed and direction.

[0046] The sliding frame can move on the ground rail connecting rail 18, allowing the carrier frame to smoothly switch between the ground rail transfer rail 16 and the ground rail return rail 17. This design reduces waiting time and ensures efficient material handling.

[0047] The support frame 182 includes a frame structure and bottom rollers. The bottom rollers cooperate with the conveying rollers to move the support frame 182 on the ground rail transfer rail 16, the ground rail return rail 17 and the ground rail connecting rail 18.

[0048] Preferably, a transition plate or transition wheel is installed in the gap between the ground rail transfer rail 16 and the ground rail connecting rail 18. These devices can fill the gap, allowing the bottom rollers on the support frame 182 to move smoothly from one rail to another.

[0049] During operation, unprocessed steel structure products are loaded onto the support frame 182 via an external loading process and a workpiece handover station. Workers or automated equipment then place the steel structure products 9 onto the support frame, preparing them for the next process.

[0050] After the control system is activated, the drive motor rotates the conveyor rollers, causing the support frame 182 and the steel structure product 9 on it to move along the ground transfer rail 16. The steel structure product 9 passes through multiple functional compartments sequentially with the support frame 182, undergoing various processes. The conveyor rollers in each functional compartment ensure that the support frame can pass smoothly and perform specific operations as needed.

[0051] When the support frame 182 reaches the end of the ground rail transfer rail 16, the steel structure product is unloaded from the support frame 182 and transferred to the external unloading process. The support frame 182 then enters the ground rail connecting rail 18. At this time, the sliding frame 181 moves along the ground rail connecting rail 18, transferring the support frame 182 from the ground rail transfer rail to the ground rail return rail 17. The support frame 182 returns to its starting position along the ground rail return rail 17, ready for the next loading task. During this process, the support frame also relies on the drive of the conveyor rollers to ensure its smooth movement.

[0052] like Figure 7 and Figure 8 As shown, in order to adapt to different process requirements, the circulating track mechanism is a segmented composite track, including at least one suspended track section 13 and at least one ground track section 14. An electric hoist 21 is slidably connected to the suspended track section 13, and a carrying trolley 23 is slidably connected to the ground track section 14.

[0053] There are two ground track sections 14 and two carrier trolleys 23, with the carrier trolleys 23 slidably connected to the ground track sections 14. The carrier trolleys 23 are respectively mounted on the ground track-type transfer units in the feed and discharge bins. The bottom of each carrier trolley 23 is equipped with rollers designed to match the tracks on the ground track sections 14. Each carrier trolley or group of trolleys is typically connected to one or more drive motors. These motors provide power, enabling the trolleys to move along the tracks.

[0054] The feeding and discharging hoppers are equipped with ground rail sections 14, while the spraying hopper 52 and baking hopper 53 are equipped with overhead rail sections 13. Different functional hoppers may require different types of handling methods. For example, the spraying hopper 52 and baking hopper 53 are suitable for suspended operation using overhead rail sections 13 to avoid interference from ground equipment and ensure uniform processing; while the feeding hopper 51 and discharging hopper 54 are more suitable for ground rail sections because they typically need to bear greater weight. The segmented composite rail design allows for flexible selection of appropriate handling methods according to specific needs.

[0055] Segmented composite tracks allow steel structure products to switch between suspended and ground rail sections according to actual needs, reducing unnecessary handling steps and time, and improving the overall logistics efficiency of the system.

[0056] In use, the unprocessed steel structure product 9 is loaded from the workpiece handover station onto the carrying trolley 23 via an external loading process. Workers or automated equipment then place the steel structure product onto the carrying trolley, preparing it for the next process.

[0057] A separate control system, drive motor, and conveyor rollers are installed on the ground track section 14. Upon startup, the drive motor rotates the conveyor rollers, causing the carrying trolley 23 and the steel structure product 9 on it to move along the ground track section 14. Transition devices (such as lifting platforms or transfer robotic arms) are provided before certain functional compartments (e.g., spraying compartment 52, drying compartment 53) to transfer the steel structure product 9 from the ground track section 14 to the suspended track section 13. The transition devices transfer the steel structure product 9 from the carrying trolley 23 to the detachable hook 22 of the electric hoist 21. The steel structure product 9 is suspended on the electric hoist 21 and moves along the suspended track section 13, passing sequentially through functional compartments such as the spraying compartment 52 and the baking compartment 53.

[0058] At this point, the carrying trolley 23, located on the ground rail section of the feeding hopper 51, returns to its initial position to continue receiving the next steel structure product 9. After completing all necessary processes, the steel structure product 9 returns to the ground rail section of the discharging hopper 54. There, it is transferred from the hanging rail section 13 to the carrying trolley 23 via a transition device, and then proceeds along the ground rail section to the final workpiece handover station.

[0059] like Figure 9 As shown, the exhaust end of the waste gas treatment system 3 connected to the spraying chamber 52 includes a dry filtration unit 31, a catalytic combustion device 33 and an adsorption purification unit connected in sequence.

[0060] In the exhaust gas treatment system 3, the dry filtration unit 31 has 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 the 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.

[0061] The catalytic combustion device 33 includes a heat exchanger, an electric heating component, and a catalytic reaction chamber, with the inlet of the heat exchanger connected to the outlet of the dry filtration unit 31. The adsorption purification unit includes a first adsorption box 321 and a second adsorption box 322, used for alternating adsorption and desorption regeneration operations. By configuring two adsorption boxes, adsorption can be performed in one adsorption box while desorption and regeneration are performed 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.

[0062] The catalytic combustion device 33 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 31, 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 33 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.

[0063] During waste gas treatment, the waste gas first undergoes preliminary purification through a dry filter unit 31 to remove large particulate pollutants and other impurities. The pre-purified waste gas then enters the heat exchanger section of the catalytic combustion device 33. There, the waste gas comes into contact with 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 assembly. If the waste gas temperature has not yet reached the activation temperature required by the catalyst, the electric heating assembly 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 34 and an elevated exhaust pipe 35.

[0064] The spraying chamber 52 includes a chamber body 521, an air filtration system 522, an air supply device, and an electrical control system; the chamber body 521 consists of a frame welded from galvanized square tubes, wall panels, and a safety door; the air supply device is located inside the spraying chamber 52 and is connected to the air filtration system 522 and the exhaust gas treatment system.

[0065] The frame of booth 521 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 52. 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 electric heating unit is located on the side of the booth, housing a heat conversion device and a hot air circulating fan.

[0066] 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 circulation track mechanism 1 is set as a hanging track, the gutter is 150mm wide to facilitate the movement of the overhead crane wire rope, and a soft and durable silicone baffle is provided to prevent the leakage of high-temperature gas and paint mist.

[0067] The spraying chambers 52 and spraying devices are configured as two, located on either side of the circulating track mechanism 1. Double-sided spraying of the steel structure product can be performed 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 52 are connected to the exhaust gas treatment system 3 via pipelines.

[0068] like Figure 11 As shown, in some embodiments, the air filtration system 522 and the chamber 521 are respectively located on both sides of the circulation track mechanism 1. This allows for better planning of the air intake and exhaust paths, ensuring uniform airflow distribution within the spray booth 52. This helps to create a stable laminar flow environment, reducing paint mist diffusion and deposition, and improving spraying quality.

[0069] 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 31 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.

[0070] like Figure 12 As shown, the air source heat pump 4 is connected to the paint baking chamber 53; the air source heat pump 4 includes a refrigerant circulation channel, which includes a compressor 41, a condenser 42, an outdoor evaporator 43, an expansion valve 455, and an indoor evaporator 44;

[0071] Among them, the evaporator: the air source heat pump drying room first absorbs low-temperature and low-pressure heat from the surrounding air, causing the moisture in the air to evaporate.

[0072] Compressor 41: After absorbing the low-temperature, low-pressure refrigerant, the compressor compresses it. This process compresses the gas into a high-temperature, high-pressure state.

[0073] Condenser 42: High-temperature, high-pressure refrigerant gas passes through the condenser, releasing heat. This causes the refrigerant gas to condense into a liquid state, releasing a large amount of heat energy.

[0074] Expansion valve 455: High-temperature and high-pressure liquid refrigerant expands rapidly through the expansion valve, and its temperature and pressure decrease accordingly, returning it to its initial low-temperature and low-pressure state.

[0075] The compressor 41 outlet is connected to the inlet of the first throttle valve 451 and the inlet of the second throttle valve 452; the outlet of the second throttle valve 452 is connected to the inlet of the condenser 42, and a fourth throttle valve 454 is connected in parallel to the compressor 41 inlet on the connecting pipe; the condenser 42 outlet is connected to a distribution pipe via an expansion valve 455; the distribution pipe includes a first channel and a second channel, the first channel is connected to the inlet of the indoor evaporator 44 via the outdoor evaporator 43 and the seventh throttle valve 457 in sequence; the second channel is directly connected to the inlet of the indoor evaporator 44 via a sixth throttle valve 456; the outlet of the indoor evaporator 44 and the outlet of the first throttle valve 451 are respectively connected to the inlet of the third throttle valve 453; the outlet of the third throttle valve 453 is connected to the compressor 41 inlet.

[0076] It also includes an air circulation channel, which includes a sealed air duct that connects the paint baking chamber 53, the indoor evaporator 44, the condenser, and the fan in sequence. The fan is used to drive air to flow through the paint baking chamber 53, the indoor evaporator 44, and the condenser 42 in sequence in the sealed air duct, and then return to the paint baking chamber 53, forming a closed air circulation path.

[0077] The workflow of high-temperature drying:

[0078] Open the second throttle valve 452, expansion valve 455, and seventh throttle valve 457, and close the remaining throttle valves; so that the refrigerant flows sequentially through the compressor 41, the second throttle valve 452, the condenser 42, the expansion valve 455, the outdoor evaporator 43, the seventh throttle valve 457, the indoor evaporator 44, and the third throttle valve 453 before returning to the compressor 41.

[0079] Refrigerant flow direction: Compressor 41-a-Second throttle valve 452-b-Condenser 42-c-Expansion valve 455-d-Outdoor evaporator 43-e-Seventh throttle valve 457-f-Indoor evaporator 44-g-Third throttle valve 453-h-Compressor 41.

[0080] The refrigerant is compressed into a high-temperature, high-pressure gas from the compressor outlet 41. During this compression, both the temperature and pressure of the refrigerant increase significantly. The high-temperature, high-pressure refrigerant gas enters the condenser 42 through the second throttle valve 452. In the condenser 42, the refrigerant releases heat to the surrounding air or water, thereby cooling and partially liquefying. During this process, the refrigerant temperature decreases, but it still maintains a relatively high pressure. After passing through the expansion valve 455, the refrigerant pressure drops rapidly, causing its temperature to decrease further, becoming a low-temperature, low-pressure liquid. In high-temperature drying mode, the refrigerant flows to the outdoor evaporator 43 through the seventh throttle valve 457, and then enters the indoor evaporator 44. The outdoor evaporator 43 absorbs heat from the external environment, causing the refrigerant to turn back into a gas. Subsequently, the gaseous refrigerant enters the indoor evaporator 44, absorbing heat from the indoor air during this process, further heating the indoor air. Finally, the refrigerant returns to the compressor 41 through the third throttle valve 453, completing one cycle.

[0081] In high-temperature drying mode, air is drawn from the paint baking chamber 53 and heated as it passes through the indoor evaporator 44, which acts as a heater at this stage, absorbing heat from the refrigerant. The heated air then passes through the condenser 42, where it may undergo further heating or cooling, depending on the specific requirements of the system design. The treated air finally returns to the paint baking chamber 53, forming a closed air circulation path to ensure that suitable temperature and humidity conditions are maintained within the paint baking chamber, achieving an efficient drying process.

[0082] The intelligent mode is suitable for high temperatures and should be used when the temperature is above 25 degrees Celsius.

[0083] Workflow of the open / closed drying mode:

[0084] Open the second throttle valve 452, expansion valve 455, and sixth throttle valve 456, and close the remaining throttle valves; so that the refrigerant flows sequentially through the compressor 41, the second throttle valve 452, the condenser 42, the expansion valve 455, the sixth throttle valve 456, the indoor evaporator 44, and the third throttle valve 453 before returning to the compressor 41.

[0085] The open / closed drying mode is suitable for use at temperatures between 10 and 25 degrees Celsius.

[0086] Refrigerant flow direction: Compressor 41-a-Second throttle valve 452-b-Condenser 42-c-Expansion valve 455-d-Sixth throttle valve 456-f-Indoor evaporator 44-g-Third throttle valve 453-h-Compressor 41.

[0087] The refrigerant is compressed into a high-temperature, high-pressure gas from the compressor outlet 41. At this point, due to compression, both the temperature and pressure of the refrigerant increase significantly. The high-temperature, high-pressure refrigerant gas enters the condenser 42 through the second throttle valve 452. In the condenser 42, the refrigerant releases heat to the surrounding air or water, thereby cooling and partially liquefying. The temperature of the refrigerant decreases, but it still maintains a relatively high pressure. After passing through the expansion valve 455, the pressure of the refrigerant drops rapidly, causing its temperature to decrease further, becoming a low-temperature, low-pressure liquid. The low-temperature, low-pressure refrigerant liquid then flows to the indoor evaporator 44 through the sixth throttle valve 456. In the indoor evaporator 44, the refrigerant absorbs heat, evaporating from the surrounding air and turning into a gas. This process cools the indoor air for dehumidification or heating, depending on the specific application. Finally, the refrigerant returns to the compressor 41 through the third throttle valve 453, completing one cycle.

[0088] Air is drawn from the paint baking chamber 53 and passes through the indoor evaporator 44. During this stage, the air is heated; the treated air then flows to the condenser 42, where it is further heated to achieve the desired drying conditions. The treated air eventually returns to the paint baking chamber 53, forming a closed air circulation path.

[0089] The compressor is controlled by a drive controller, which sets the drying temperature value.

[0090] Low-temperature drying process:

[0091] Open the first throttle valve 451, the fourth throttle valve 454, and the sixth throttle valve 456, and close the remaining throttle valves; so that the refrigerant flows sequentially through the compressor 41, the first throttle valve 451, the indoor evaporator 44, the sixth throttle valve 456, the expansion valve 455, the condenser 42, and the fourth throttle valve 454 before returning to the compressor 41.

[0092] Refrigerant flow direction: Compressor 41-a-First throttle valve 451-g-Indoor evaporator 44-f-Sixth throttle valve 456-d-Expansion valve 455-c-Condenser 42-b-Fourth throttle valve 454-h-Compressor 41.

[0093] The refrigerant is compressed into a high-temperature, high-pressure gas from the compressor outlet 41. At this point, due to compression, both the temperature and pressure of the refrigerant increase significantly. The high-temperature, high-pressure refrigerant gas passes through the first expansion valve 451 and enters the indoor evaporator 44. This step differs from high-temperature or open-close drying modes; the high-temperature, high-pressure refrigerant is directly guided to the indoor evaporator 44 to heat the air. In the indoor evaporator 44, the refrigerant releases heat to the surrounding air, thereby heating the air for drying. During this process, the refrigerant cools and partially liquefies, but the pressure remains high. Afterward, the refrigerant passes through the sixth expansion valve 456 before flowing to the expansion valve 455, preparing to enter the expansion stage. After passing through the expansion valve 455, the refrigerant pressure drops rapidly, causing its temperature to further decrease, becoming a low-temperature, low-pressure liquid. Subsequently, the low-temperature, low-pressure refrigerant liquid flows into the condenser 42, where it absorbs heat from the external environment. If the external temperature is low, additional auxiliary heating may be required to make the refrigerant revert to a gaseous state and restore a certain temperature and pressure. Finally, the refrigerant returns to the compressor 41 through the fourth throttle valve 454, completing one cycle.

[0094] Air is drawn from the paint drying chamber 53 and enters the air circulation system. The air flows through the indoor evaporator 44, where it is heated, releasing heat from the refrigerant. The heated air then continues to flow to the condenser 42. Finally, the heated air returns to the paint drying chamber 53, providing a suitable drying environment for the product.

[0095] Low-temperature drying is suitable for certain specific applications where materials need to be dried at temperatures below ambient. The second throttle valve 452 and the third throttle valve 453 are four-way throttle valves.

[0096] The air source heat pump 4 also includes a temperature sensor and a central controller. The temperature sensor is located inside the paint baking chamber 53. The central controller connects the temperature sensor to the air source heat pump 4. The temperature sensor monitors the temperature inside the paint baking chamber 53 in real time and feeds it back to the central controller, which dynamically adjusts the heat output of the air source heat pump 4. By monitoring the temperature at the outlet of the compressor 41, the controller can precisely adjust the direction and flow rate of the refrigerant. This allows the system to dynamically adjust operating parameters according to actual needs, thereby improving the overall energy conversion efficiency. When external environmental conditions change (such as temperature or humidity), the system can respond quickly and make corresponding adjustments to ensure high energy efficiency under various operating conditions.

[0097] It should be noted that the control system, spraying device, and drive mechanism 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. The "inlet" and "outlet" in this embodiment need to be determined in conjunction with the system operating mode and are not absolutely unidirectional.

[0098] 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 steel structural product processing system characterized by: It includes a circulating track mechanism (1), a spraying device, an exhaust gas treatment system (3), an air source heat pump (4), and a control system; The circulating track mechanism (1) includes a product transfer section and an empty return section. The product transfer section passes through the feeding hopper (51), the spraying hopper (52), the baking hopper (53), and the discharge hopper (54) in sequence. A transfer unit is movably connected to the circulating track mechanism. The transfer unit is used to carry the steel structure product (9) and move along the product transfer section. The spraying device is set in the spraying hopper (52). The spraying device includes a guide rail (201) and a spraying robot (202) slidably connected to the guide rail. The exhaust gas treatment system (3) is connected to the exhaust end of the spraying hopper (52). It includes a dry filter unit (31), a catalytic combustion device (33), and an adsorption purification unit connected in sequence. The air source heat pump (4) is connected to the baking hopper (53). The control system is connected to the circulating track mechanism (1), the spraying robot (202), the exhaust gas treatment system (3), and the air source heat pump (4) to coordinate the continuous operation of the transfer, spraying, and drying processes.

2. A steel construction product processing system according to claim 1, characterized in that The circulating track mechanism (1) is a hanging track mechanism, including a frame (11) and a ring track (12). The transfer unit is an electric hoist (21) and a detachable hook (22). The steel structure product (9) is suspended on the detachable hook (22).

3. A steel construction product processing system according to claim 2, characterized in that The top of the feeding hopper (51), spraying hopper (52), baking hopper (53) and discharging hopper (54) are all provided with sliding grooves, and the electric hoist (21) is slidably connected to the sliding grooves.

4. A steel construction product processing system according to claim 1, characterized in that The circulating track mechanism (1) is a ground track mechanism, including a ground track transfer track (16) and a ground track return track (17) arranged in parallel. The transfer unit is a carrier frame (182). The two ends of the ground track transfer track (16) are connected to the ground track return track (17) through the ground track connecting track (18), and the sliding frame (181) is slidably connected on the ground track connecting track (18). The carrier frame (182) is movably arranged on the sliding frame (181).

5. A steel construction product processing system according to claim 1, characterized in that: The circulating track mechanism (1) is a segmented composite track, including at least one suspended track section (13) and at least one ground track section (14); the suspended track section (13) is equipped with an electric hoist (21), and the ground track section (14) is equipped with a carrying trolley (23).

6. A steel construction product processing system according to claim 1, characterized in that: In the waste gas treatment system (3), the dry filtration unit (31) is a multi-stage filtration structure, the catalytic combustion device (33) includes a heat exchanger, an electric heating component and a catalytic reaction chamber, and the inlet of the heat exchanger is connected to the outlet of the dry filtration unit (31); the adsorption purification unit includes a first adsorption box (321) and a second adsorption box (322), which are used to alternately perform adsorption and desorption regeneration operations.

7. A steel construction product processing system according to claim 1, characterized in that: The spraying chamber (52) includes a chamber body (521), an air filtration system (522), an air supply device, and an electrical control system; the chamber body (521) 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 (52) and is connected to the air filtration system (522) and the exhaust gas treatment system.

8. A steel construction product processing system according to claim 1, characterized in that: The air source heat pump (4) includes a refrigerant circulation channel, which includes a compressor (41), a condenser (42), an outdoor evaporator (43), and an indoor evaporator (44). The outlet of the compressor (41) is connected to a first throttle valve (451) and a second throttle valve (452). The outlet of the second throttle valve (452) is connected to the inlet of the condenser (42), and a fourth throttle valve (454) is connected in parallel to the inlet of the compressor (41) on the refrigerant circulation channel. The outlet of the condenser (42) is split into two paths by an expansion valve (455): the first path is connected to the inlet of the indoor evaporator (44) via the outdoor evaporator (43) and the seventh throttle valve (457), and the second path is directly connected to the inlet of the indoor evaporator (44) via the sixth throttle valve (456). The outlet of the indoor evaporator (44) and the outlet of the first throttle valve (451) merge into the third throttle valve (453) and then return to the compressor (41).

9. A steel construction product processing system according to claim 8, characterized in that It also includes an air circulation channel, which includes a sealed air duct that connects the paint baking chamber (53), the indoor evaporator (44), the condenser (42), and the fan in sequence. The fan is used to drive air to flow through the paint baking chamber (53), the indoor evaporator (44), and the condenser (42) in the sealed air duct in sequence, and then return to the paint baking chamber (53), forming a closed air circulation path.

10. A steel construction product processing system according to claim 9, characterized in that It also includes a temperature sensor and a central controller. The temperature sensor is installed inside the paint baking chamber (53). The central controller connects the temperature sensor to the air source heat pump (4). The temperature sensor monitors the temperature inside the paint baking chamber (53) in real time and feeds it back to the central controller. The central controller dynamically adjusts the heat output of the air source heat pump (4).

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