A multi-component precise proportioning mixing device for spraying

Abstract

This invention relates to the field of spraying equipment technology and discloses a multi-component precise proportioning mixing device for spraying, including a main agent tank, a curing tank, a transparent mixing tank, and an intelligent formula management and control system. The main agent tank is used to store the main agent, the curing tank is used to store the curing agent, and the transparent mixing tank is used to remix the initially mixed main agent and curing agent. Both the main agent tank and the curing tank are equipped with jacketed water bath constant temperature tanks on their outer walls. Circulation inlets are provided on both the top and bottom sides of the jacketed water bath constant temperature tanks. Liquid level sensors are installed through the top side of both the main agent tank and the curing tank. Viscosity drift is eliminated through the tank water bath and pipeline insulation, ensuring servo metering accuracy. A three-stage series mixing path is adopted to sequentially achieve pre-dispersion, deep stirring, and final homogenization, solving the problems of uneven dispersion at high proportions and insufficient mixing at high viscosity, and improving the consistency of coating curing.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, specifically to a multi-component precision mixing equipment for spraying. Background Technology

[0002] Spraying equipment is a specialized tool used to apply protective or decorative layers to metal and non-metal surfaces. It is categorized into manual, semi-automatic, and fully automatic types based on its level of automation. China's spraying equipment manufacturing industry began after the reform and opening up. With the development of industrial automation, spraying production lines have been applied in the automotive, home appliance, and aerospace industries. Intelligent spraying equipment achieves coating uniformity control through automatic trajectory planning and collaborative operation systems, significantly improving construction efficiency. Currently, the industry is in the technology import stage, facing issues such as insufficient manufacturing capabilities for basic components, and core components still rely on imports. Some models, such as the Fengtan third-generation coating robot, have achieved a latex paint spraying efficiency of 250㎡ / hour and support multi-machine collaborative operation.

[0003] Multi-component coatings (such as two-component polyurethane, polyurea, and epoxy systems) have become the mainstream materials in industrial coating and anti-corrosion engineering due to their excellent wear resistance, corrosion resistance, weather resistance, and adhesion. Their coating performance depends entirely on the precise ratio and uniform mixing of each component. Once the ratio is out of balance or the mixing is uneven, it will directly lead to quality problems such as coating softening, poor curing, cracking, and peeling, resulting in the scrapping of the entire batch of materials and rework of the project.

[0004] Currently, most existing equipment uses open-loop metering or single-flow closed-loop control, lacking a compensation mechanism for fluctuations in coating temperature, viscosity, and pressure. Changes in ambient temperature and batch differences in coatings can cause significant viscosity fluctuations, directly resulting in metering deviations. The feeding, metering, and mixing pipelines of existing equipment are mostly designed in a shared manner. When changing colors or materials, the entire pipeline needs to be repeatedly cleaned, resulting in high solvent consumption and long cleaning time. A single color change can take more than 30 minutes, and the residual material in the pipeline cannot be recovered, directly causing coating waste. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multi-component precision mixing device for spraying, which solves the problems of low seed quantity control accuracy and disconnect between sowing and covering processes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-component precision mixing device for spraying, comprising: The system includes a main agent tank, a curing tank, a transparent mixing tank, and an intelligent formula management and control system. The main agent tank is used to store the main agent, the curing tank is used to store the curing agent, and the transparent mixing tank is used to remix the initially mixed main agent and curing agent. Both the main agent tank and the curing tank have jacketed water bath thermostatic tanks on their outer walls. Each jacketed water bath thermostatic tank has a circulating water inlet on one side of its top and one side of its bottom. Both the main agent tank and the curing tank have a liquid level sensor installed through their top sides. A servo motor is fixedly connected to the top of both the main agent tank and the curing tank. A stirring shaft is fixedly connected to the output end of the servo motor. Evenly distributed paddles are fixedly connected to the outer wall of the stirring shaft. A counter-flushing premixing assembly is installed at the bottom of both the main agent tank and the curing tank. A pneumatic shut-off valve is fixedly connected to the bottom of the transparent mixing tank, and a static mixing tank is fixedly connected to the bottom of the pneumatic shut-off valve. The bottom of the static mixing tank is threadedly connected to a feed pipe. One end of the feed pipe is equipped with a three-way reversing valve. The bottom of the three-way reversing valve is equipped with a spray pipe. One end of the spray pipe is threadedly connected to a high-pressure airless spray gun. The output end of the high-pressure airless spray gun is equipped with an atomizing pressure regulating structure. The other end of the high-pressure airless spray gun is connected to a pneumatic needle valve. One side of the three-way reversing valve is equipped with a solvent pipeline interface, and the other side of the three-way reversing valve is equipped with a compressed air pipeline interface.

[0007] Preferably, the counter-mixing assembly includes a servo screw pump and a high-precision servo plunger pump. The input end of the servo screw pump is fixedly connected to the bottom of the main agent tank, and the input end of the high-precision servo plunger pump is fixedly connected to the bottom of the curing tank. The output ends of both the servo screw pump and the high-precision servo plunger pump are fixedly connected to a discharge pipe, and one end of the discharge pipe is fixedly connected to a flange.

[0008] Preferably, one end of the flange is provided with a second discharge pipe, and the outer walls of both the second discharge pipe and the first discharge pipe are provided with a heat insulation film. One end of the second discharge pipe is fixedly connected to a gathering head, and one end of the gathering head is fixedly connected to a counter-flushing premixing pipe.

[0009] Preferably, an observation box is provided between the two counter-current premixing pipes, with plugs installed at both ends of the observation box, and a discharge pipe is provided at the bottom of the observation box, with a pneumatic shut-off valve connected through and fixed to the outer wall of the discharge pipe.

[0010] Preferably, a premixing tank is provided at the bottom of the feeding pipe, and the bottom of the premixing tank is connected to the top of the transparent mixing tank.

[0011] Preferably, a servo motor 2 is fixedly connected to the top center of the transparent mixing tank, a stirring shaft 2 is fixedly connected to the output end of the servo motor 2, and uniformly distributed blades 2 are fixedly connected to the outer wall of the stirring shaft 2.

[0012] Preferably, the intelligent formula management and control system adopts a PLC + industrial touch screen architecture and is equipped with a wireless communication module; it has a built-in formula storage unit that can store spraying formulas and recall them with one click; it has real-time parameter monitoring, operation data storage traceability, fault self-diagnosis and alarm, and remote monitoring functions.

[0013] Preferably, a method for operating a multi-component precision mixing equipment for spraying includes the following steps: S1: Equipment Preparation Add each component of the coating to its corresponding storage tank, start the constant temperature control unit, and stabilize the coating temperature at the preset value; S2: Recipe Settings Select or preset the spraying formula in the measurement and control system, and set parameters such as mixing ratio, flow rate, mixing speed, and spraying pressure. S3: Metrological Calibration Start the metering pump, purge the air from the pipeline, calibrate the metering accuracy of each component, and ensure that the mixing ratio meets the preset requirements; S4: Spraying Operation Triggering the spray gun switch triggers the system to start feeding, mixing, and spraying. The dual closed-loop control system corrects the mixing ratio deviation in real time to ensure stable spraying. S5: Cleaning and Maintenance After the operation is completed, the cleaning program is started with one click to complete the fully automatic cleaning of the pipeline, mixing chamber and spray gun, drain the residual material and waste liquid, and complete the equipment maintenance.

[0014] Working principle: I. Standby preparation stage After the equipment is powered on and supplied with gas, the intelligent formula management and control system enters standby mode. The main agent and curing agent are added to the main agent tank and curing tank respectively. The level sensor monitors the material level in the tank in real time, and feeding stops when the level reaches the set value. The system starts servo motor one, driving stirring shaft one and impeller one to rotate at a preset speed, continuously stirring the coating in the tank to prevent sedimentation and stratification. Simultaneously, the jacketed water bath constant temperature tank forms a closed circulation water circuit with an external constant temperature circulator through a circulation port, stabilizing the coating temperature in the main agent tank and curing tank at the preset value. The insulation film wrapped around the outer wall of all discharge pipes continuously maintains a constant coating temperature within the pipeline, eliminating viscosity fluctuations caused by changes in ambient temperature from the source, laying the foundation for accurate subsequent metering. II. Metering and Feeding Stage Operators select or preset the spraying formula on the industrial touchscreen, inputting parameters such as the target ratio, total flow rate, mixing speed, and spraying pressure. The system automatically decomposes the target output quantities of the main agent and curing agent. After the metering program is started, the servo screw pump and the high-precision servo plunger pump start synchronously, pumping the main agent from the main agent tank and the curing agent from the curing tank out at the set flow rates, respectively. The coating is sequentially conveyed to the collection head through discharge pipe one, flange, and discharge pipe two. The intelligent formula management and control system collects the operating parameters of the metering pump in real time and dynamically corrects the pump speed to ensure that the output ratio of the main agent and curing agent strictly matches the preset ratio. III. Three-tiered mixed stage After the main agent and curing agent are separated by the aggregator, they are injected into the observation box through two sets of opposing premixing pipes using a high-pressure opposing method to complete the first stage of preliminary dispersion and mixing. The removable plugs at both ends of the observation box allow operators to visually observe the premixing status and clean residual impurities. The premixed coating flows into the premixing tank through the discharge pipe for buffering and pressure stabilization. The pneumatic shut-off valve on the discharge pipe controls the flow of the premixed coating. After buffering, the coating enters the transparent mixing tank. The system starts the second servo motor, which drives the second stirring shaft and the second blade to rotate at the preset speed of the formula, to perform the second stage of forced dynamic mixing of the coating. The transparent tank design allows for real-time observation of the internal mixing effect and timely detection of uneven mixing problems. After dynamic mixing is completed, the pneumatic shut-off valve at the bottom of the transparent mixing tank is opened, and the paint flows into the static mixing tank. It undergoes the third stage of final homogenization through the fixed spiral guide structure inside the tank, so that the main agent and the curing agent are fully integrated, ensuring that the paint entering the spraying stage is uniformly mixed. IV. Spraying Operation Stage The uniformly mixed coating is delivered to the high-pressure airless spray gun via a feed pipe, a three-way reversing valve, and a spray pipe at the bottom of the static mixing tank. When the spray gun switch is triggered, the pneumatic needle valve opens simultaneously. Under high pressure, the coating is atomized by the atomization and pressure regulating structure and then sprayed onto the workpiece surface. The atomization and pressure regulating structure can adjust the atomization pressure and spraying effect in real time according to the spraying requirements. During the spraying process, the intelligent formula management and control system continuously monitors the flow rate, pressure, and temperature parameters of each component and corrects the metering pump output in real time to ensure stable mixing ratios during the spraying process. When the spray gun switch is released, the pneumatic needle valve closes simultaneously, the metering pump stops supplying material, and the spraying operation is paused. V. Cleaning and Maintenance Phase After the spraying operation is completed, the cleaning program is started with a single button on the touchscreen. The three-way reversing valve automatically switches the circuit, cutting off the supply line and sequentially connecting the solvent and compressed air lines. High-pressure solvent first flushes the supply line, spray line, high-pressure airless spray gun, and the interior of each mixing tank to remove residual paint. Then, compressed air purges the lines, emptying residual solvent and waste liquid. After cleaning, the three-way reversing valve resets, and the equipment returns to standby mode, awaiting the next operation.

[0015] This invention provides a multi-component precision mixing device for spraying. It has the following beneficial effects: 1. This invention eliminates viscosity drift by using a tank water bath and pipeline insulation to ensure servo metering accuracy; it adopts a three-stage series mixing path to achieve pre-dispersion, deep stirring and final homogenization in sequence, solving the problems of uneven dispersion and insufficient mixing of high-proportion and high-viscosity materials, and improving the consistency of coating curing.

[0016] 2. This invention features a transparent observation box and a transparent mixing tank, allowing for real-time monitoring of the mixing status without disassembling the machine; it integrates a three-way reversing valve to enable one-button switching of the material supply, solvent, and compressed air pathways, and automatically completes full pipeline flushing and purging, significantly shortening material change and cleaning time and reducing solvent and coating waste. Attached Figure Description

[0017] Figure 1 This is a front view of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a cross-sectional view of the jacketed water bath constant temperature tank of the present invention; Figure 4 This is a cross-sectional view of the transparent mixing tank of the present invention; Figure 5 This is a schematic diagram of the three-way directional valve of the present invention; Figure 6 This is a schematic diagram of the feed pipe of the present invention; Figure 7 This is a schematic diagram of the high-pressure airless spray gun of the present invention.

[0018] The components include: 1. Jacketed water bath thermostatic tank; 2. Servo screw pump; 3. Circulating water inlet; 4. High-precision servo plunger pump; 5. Premixing tank; 6. Transparent mixing tank; 7. Static mixing tank; 8. Spray pipe; 9. High-pressure airless spray gun; 10. Main agent tank; 11. Servo motor; 12. Liquid level sensor; 13. Stirring shaft; 14. Paddle; 15. Pneumatic needle valve; 16. Atomizing pressure regulating structure; 17. Solid... 18. Discharge pipe 1; 19. Flange; 20. Discharge pipe 2; 21. Insulation film; 22. Aggregator head; 23. Counter-mixing pipe; 24. Observation box; 25. Plug; 26. Feed pipe; 27. Servo motor 2; 28. Stirring shaft 2; 29. ​​Paddle 2; 30. Feed pipe; 31. Three-way reversing valve; 32. Solvent pipeline interface; 33. Compressed air pipeline interface; 34. Pneumatic shut-off valve. Detailed Implementation

[0019] The technical solutions in 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: Please see the appendix Figure 1 -Appendix Figure 7 This invention provides a multi-component precise proportioning mixing device for spraying, including... The system includes a main agent tank 10, a curing tank 17, a transparent mixing tank 6, and an intelligent formula management and control system. The main agent tank 10 is used to store the main agent, the curing tank 17 is used to store the curing agent, and the transparent mixing tank 6 is used to remix the initially mixed main agent and curing agent. Both the main agent tank 10 and the curing tank 17 are equipped with a jacketed water bath constant temperature tank 1 on their outer walls. The jacketed water bath constant temperature tank 1 has a circulating water inlet 3 on one side of its top and one side of its bottom. Both the main agent tank 10 and the curing tank 17 have a liquid level sensor 12 installed through their top sides. Both the main agent tank 10 and the curing tank 17 have a servo motor 11 fixedly connected to their tops. The output end of the servo motor 11 is fixedly connected to a stirring shaft 13. The outer wall of the stirring shaft 13 is fixedly connected to evenly distributed paddles 14. Both the main agent tank 10 and the curing tank 17 have a counter-flushing premixing component at their bottoms. The bottom of the transparent mixing tank 6 is fixedly connected to a pneumatic shut-off valve 34, and the bottom of the pneumatic shut-off valve 34 is fixedly connected to a static mixing tank 7.

[0021] Storage unit: Main agent tank 10 + curing tank 17, both with outer walls wrapped in jacketed water bath constant temperature tank 1, connected to an external constant temperature circulation machine through circulation port 3. Stirring unit: Each tank is equipped with a servo motor 11 at the top, driving the stirring shaft 13 and the blade 14 to prevent coating sedimentation and stratification. Monitoring unit: Each tank is equipped with a liquid level sensor 12 at the top to monitor the material level in real time. Metering and conveying unit: The main agent uses a servo screw pump 2, and the curing agent uses a high-precision servo plunger pump 4. Insulation unit: All discharge pipes are wrapped with an insulation film 21 to maintain a constant coating temperature in the pipeline.

[0022] A feed pipe 30 is threadedly connected to the bottom of the static mixing tank 7. A three-way reversing valve 31 is installed at one end of the feed pipe 30. A spray pipe 8 is installed at the bottom of the three-way reversing valve 31. A high-pressure airless spray gun 9 is threadedly connected to one end of the spray pipe 8. An atomizing pressure regulating structure 16 is installed at the output end of the high-pressure airless spray gun 9. A pneumatic needle valve 15 is installed through the other end of the high-pressure airless spray gun 9. A solvent pipeline interface 32 is installed on one side of the three-way reversing valve 31. A compressed air pipeline interface 33 is installed on the other side of the three-way reversing valve 31. A servo motor 27 is fixedly connected to the middle of the top of the transparent mixing tank 6. A stirring shaft 28 is fixedly connected to the output end of the servo motor 27. Evenly distributed blades 29 are fixedly connected to the outer wall of the stirring shaft 28.

[0023] Level 1: Hedging Premix The main agent and curing agent are transported to the aggregation head 22 through their respective pipelines. They are then subjected to high-pressure flushing in the observation box 24 through the flushing premixing pipe 23 to complete the initial dispersion and mixing. The observation box is equipped with removable plugs 25 at both ends to facilitate observation of the premixing state and cleaning of residues. After premixing, the coating enters the premixing tank 5 for buffering through the discharge pipe 26. A pneumatic shut-off valve 34 is installed on the discharge pipe to control the on / off state. Level 2: Transparent Dynamic Blending The coating in the premix tank flows into the transparent mixing tank 6, where the stirring shaft 28 and the blade 29 are driven by the servo motor 27 to perform forced dynamic stirring. The transparent tank design allows for direct observation of the internal mixing state and timely detection of uneven mixing problems. Level 3: Static Mixing After dynamic mixing, the coating enters the static mixing tank 7 through the pneumatic shut-off valve 34, where it undergoes final homogenization through an internally fixed spiral structure to ensure uniform mixing.

[0024] A feed pipe 30 is threadedly connected to the bottom of the static mixing tank 7. A three-way reversing valve 31 is installed at one end of the feed pipe 30. A spray pipe 8 is installed at the bottom of the three-way reversing valve 31. A high-pressure airless spray gun 9 is threadedly connected to one end of the spray pipe 8. An atomizing pressure regulating structure 16 is installed at the output end of the high-pressure airless spray gun 9. A pneumatic needle valve 15 is installed through the other end of the high-pressure airless spray gun 9. A solvent pipeline interface 32 is installed on one side of the three-way reversing valve 31. A compressed air pipeline interface 33 is installed on the other side of the three-way reversing valve 31. A discharge pipe 20 is installed at one end of the flange 19. Both the second discharge pipe 20 and the first discharge pipe 18 are provided with heat insulation film 21 on their outer walls. One end of the second discharge pipe 20 is fixedly connected to a gathering head 22. One end of the gathering head 22 is fixedly connected to a counter-flushing premixing pipe 23. An observation box 24 is provided between the two counter-flushing premixing pipes 23. Both ends of the observation box 24 are provided with plugs 25. The bottom of the observation box 24 is provided with a discharge pipe 26. The outer wall of the discharge pipe 26 is fixedly connected with a pneumatic shut-off valve 34. The bottom of the discharge pipe 26 is provided with a premixing tank 5. The bottom of the premixing tank 5 is connected to the top of the transparent mixing tank 6.

[0025] The mixed coating now features atomized spraying and basic cleaning functions. The bottom of the static mixing tank is connected to the feed pipe 30, which is connected to the spray pipe 8 via the three-way reversing valve 31 to the high-pressure airless spray gun 9. The spray gun is equipped with an atomizing pressure regulating structure 16, which can adjust the atomization effect and spraying pressure. A pneumatic needle valve 15 is set to control the paint flow. The three-way reversing valve 31 is connected to both the solvent pipeline interface 32 and the compressed air pipeline interface 33 for pipeline flushing and purging after shutdown.

[0026] The intelligent formula management and control system adopts a PLC + industrial touch screen architecture and is equipped with a wireless communication module; it has a built-in formula storage unit that can store spraying formulas and recall them with one click; it has real-time parameter monitoring, operation data storage and traceability, fault self-diagnosis and alarm, and remote monitoring functions.

[0027] It achieves basic automated control and data management of the equipment, with a functional framework consistent with industry-standard solutions: It adopts a PLC + industrial touch screen architecture, is equipped with a wireless communication module, supports the storage and one-click recall of spraying formulas, and has real-time parameter monitoring, operation data storage traceability, fault self-diagnosis and alarm, and remote monitoring functions.

[0028] A method for operating a multi-component precision mixing equipment for spraying includes the following steps: S1: Equipment Preparation Add each component of the coating to its corresponding storage tank, start the constant temperature control unit, and stabilize the coating temperature at the preset value; S2: Recipe Settings Select or preset the spraying formula in the measurement and control system, and set parameters such as mixing ratio, flow rate, mixing speed, and spraying pressure. S3: Metrological Calibration Start the metering pump, purge the air from the pipeline, calibrate the metering accuracy of each component, and ensure that the mixing ratio meets the preset requirements; S4: Spraying Operation Triggering the spray gun switch triggers the system to start feeding, mixing, and spraying. The dual closed-loop control system corrects the mixing ratio deviation in real time to ensure stable spraying. S5: Cleaning and Maintenance After the operation is completed, the cleaning program is started with one click to complete the fully automatic cleaning of the pipeline, mixing chamber and spray gun, drain the residual material and waste liquid, and complete the equipment maintenance.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-component precision mixing device for spraying, characterized in that, include: The system includes a main agent tank (10), a curing tank (17), a transparent mixing tank (6), and an intelligent formula management and control system. The main agent tank (10) is used to store the main agent, the curing tank (17) is used to store the curing agent, and the transparent mixing tank (6) is used to mix the initially mixed main agent and curing agent again. The outer walls of both the main agent tank (10) and the curing tank (17) are equipped with jacketed water bath constant temperature tanks (1). The top and bottom sides of the jacketed water bath constant temperature tank (1) are equipped with circulating water inlets (3). The top sides of both the main agent tank (10) and the curing tank (17) are connected to the main agent tank and the curing tank (17). A liquid level sensor (12) is provided. A servo motor (11) is fixedly connected to the top of the main agent tank (10) and the curing tank (17). A stirring shaft (13) is fixedly connected to the output end of the servo motor (11). A uniformly distributed paddle (14) is fixedly connected to the outer wall of the stirring shaft (13). A counter-flushing premixing assembly is provided at the bottom of the main agent tank (10) and the curing tank (17). A pneumatic shut-off valve (34) is fixedly connected to the bottom of the transparent mixing tank (6). A static mixing tank (7) is fixedly connected to the bottom of the pneumatic shut-off valve (34). The bottom of the static mixing tank (7) is threadedly connected to a feed pipe (30). One end of the feed pipe (30) is provided with a three-way reversing valve (31). The bottom of the three-way reversing valve (31) is provided with a spray pipe (8). One end of the spray pipe (8) is threadedly connected to a high-pressure airless spray gun (9). The output end of the high-pressure airless spray gun (9) is provided with an atomizing pressure regulating structure (16). The other end of the high-pressure airless spray gun (9) is connected with a pneumatic needle valve (15). One side of the three-way reversing valve (31) is provided with a solvent pipeline interface (32). The other side of the three-way reversing valve (31) is provided with a compressed air pipeline interface (33).

2. The multi-component precise proportioning mixing equipment for spraying according to claim 1, characterized in that, The counter-mixing premixing assembly includes a servo screw pump (2) and a high-precision servo plunger pump (4). The input end of the servo screw pump (2) is fixedly connected to the bottom of the main agent tank (10), and the input end of the high-precision servo plunger pump (4) is fixedly connected to the bottom of the curing tank (17). The output ends of the servo screw pump (2) and the high-precision servo plunger pump (4) are both fixedly connected to a discharge pipe (18), and one end of the discharge pipe (18) is fixedly connected to a flange (19).

3. The multi-component precise proportioning mixing equipment for spraying according to claim 2, characterized in that, One end of the flange (19) is provided with a discharge pipe two (20), and the outer walls of the discharge pipe two (20) and the discharge pipe one (18) are both provided with a heat insulation film (21). One end of the discharge pipe two (20) is fixedly connected to a gathering head (22), and one end of the gathering head (22) is fixedly connected to a counter-flushing premixing pipe (23).

4. The multi-component precise proportioning mixing equipment for spraying according to claim 3, characterized in that, An observation box (24) is provided between the two counter-mixing pipes (23). Both ends of the observation box (24) are provided with plugs (25). A feed pipe (26) is provided at the bottom of the observation box (24). A pneumatic shut-off valve (34) is connected through and fixedly connected to the outer wall of the feed pipe (26).

5. The multi-component precise proportioning mixing equipment for spraying according to claim 4, characterized in that, The bottom of the feed pipe (26) is provided with a premix tank (5), and the bottom of the premix tank (5) is connected to the top of the transparent mixing tank (6).

6. The multi-component precise proportioning mixing equipment for spraying according to claim 1, characterized in that, A servo motor (27) is fixedly connected to the top center of the transparent mixing tank (6), and a stirring shaft (28) is fixedly connected to the output end of the servo motor (27). A uniformly distributed impeller (29) is fixedly connected to the outer wall of the stirring shaft (28).

7. The multi-component precise proportioning mixing equipment for spraying according to claim 1, characterized in that, The intelligent formula management and control system adopts a PLC + industrial touch screen architecture and is equipped with a wireless communication module; it has a built-in formula storage unit that can store spraying formulas and recall them with one click; it has real-time parameter monitoring, operation data storage and traceability, fault self-diagnosis and alarm, and remote monitoring functions.

8. A method for operating a multi-component precision mixing equipment for spraying, characterized in that, Includes the following steps: S1: Equipment Preparation Add each component of the coating to its corresponding storage tank, start the constant temperature control unit, and stabilize the coating temperature at the preset value; S2: Recipe Settings Select or preset the spraying formula in the measurement and control system, and set parameters such as mixing ratio, flow rate, mixing speed, and spraying pressure. S3: Metrological Calibration Start the metering pump, purge the air from the pipeline, calibrate the metering accuracy of each component, and ensure that the mixing ratio meets the preset requirements; S4: Spraying Operation Triggering the spray gun switch triggers the system to start feeding, mixing, and spraying. The dual closed-loop control system corrects the mixing ratio deviation in real time to ensure stable spraying. S5: Cleaning and Maintenance After the operation is completed, the cleaning program is started with one click to complete the fully automatic cleaning of the pipeline, mixing chamber and spray gun, drain the residual material and waste liquid, and complete the equipment maintenance.

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