Temperature control type paint spraying room for pressure container
By using the equalization chamber and temperature control device of the temperature-controlled spray booth, combined with multi-point temperature sensors and PID controllers, the problems of unstable temperature control and adaptive adjustment in traditional spray booths are solved, achieving precise temperature control and efficient energy utilization.
Patent Information
- Application Number
- CN202423287861.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Traditional spray booths have low temperature control accuracy and lack adaptive adjustment capabilities, resulting in unstable temperatures, which affects paint quality and leads to energy waste.
The temperature-controlled spray booth uses a pressure equalization chamber and a temperature control device to achieve stable temperature control. Combined with multi-point temperature sensors and a closed-loop digital PID controller, it achieves adaptive adjustment and precise temperature control.
It improved paint quality and production efficiency, reduced energy consumption and human error, and lowered production costs.
Smart Images
Figure CN223761320U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spray painting, and more particularly to the field of pressure vessel spray painting technology, specifically referring to a temperature-controlled spray booth for pressure vessels. Background Technology
[0002] In the pressure vessel manufacturing industry, painting is a crucial process that directly affects the product's appearance and long-term durability. However, many traditional paint booths use relatively simple heating equipment, which presents the following problems:
[0003] First, the temperature control accuracy is relatively low. Significant temperature fluctuations are common during the painting process. This instability has a particularly significant impact on paint quality: when the temperature is too high, the paint film may appear white or have an orange-peel texture; when the temperature is too low, the paint layer is prone to running. This uncertainty in temperature control directly affects the uniformity and adhesion of the paint, thereby reducing the corrosion resistance and service life of the pressure vessel.
[0004] Secondly, traditional spray booths lack adaptive temperature control capabilities. When faced with different seasons, weather conditions, or different painting process requirements, they often cannot automatically and quickly adjust to the appropriate temperature range. Operators typically need to manually adjust the temperature control settings frequently, which is not only time-consuming and labor-intensive but also prone to inaccurate temperature control due to human error.
[0005] Thirdly, there is the issue of energy waste. Traditional paint booth temperature control systems often suffer from overheating due to a lack of precise temperature control. This problem is particularly pronounced when handling large pressure vessels. This not only results in significant energy waste but also significantly increases the company's operating costs.
[0006] In view of the shortcomings of the existing technology, this technology aims to provide a temperature-controlled spray booth that can effectively solve problems such as temperature control stability, adaptive adjustment, and energy utilization efficiency. Utility Model Content
[0007] This invention addresses the shortcomings of existing technologies by providing a temperature-controlled spray booth for pressure vessels, effectively solving problems related to temperature control stability, adaptive adjustment, and energy utilization efficiency.
[0008] This utility model is achieved through the following technical solution: a temperature-controlled spray booth for pressure vessels, comprising a booth body, a pressure equalization chamber located directly above the pressure vessel, an air supply outlet connected to the pressure equalization chamber, and an exhaust outlet located below the side of the pressure vessel. The air supply outlet is connected to an air supply system via an air supply pipe, and the air supply system is equipped with a temperature control device. The exhaust outlet is connected to a paint mist filtration and exhaust device.
[0009] In this preferred solution, the air supply system primarily introduces fresh air and, with the heat exchange function of the temperature control device, maintains a constant temperature and humidity to meet the requirements of painting. Through the placement of the equalizing chamber and the paint mist filtering exhaust device, a top-suction, bottom-suction ventilation method is adopted to achieve laminar airflow within the room. Simultaneously, the equalizing chamber ensures uniform airflow. This solution not only meets the requirements for uniform indoor airflow and air field but also ensures that paint mist generated during the painting process is captured in a timely manner, improving the operating environment. The temperature control device achieves stable temperature control and replaces manual operation. It automatically adjusts to different seasonal temperatures, thereby improving yield, reducing waste, and lowering energy consumption.
[0010] Preferably, the pressure vessel is provided with an air inlet located circumferentially around the equalizing chamber at an angle above it, and a first diversion valve is provided on the air supply pipe, which is connected to the air inlet through the air supply pipe.
[0011] In this preferred embodiment, the air entering from the air inlet is sent directly to the paint booth without passing through the equalization chamber. Before painting, the paint booth is quickly preheated. During the painting process, the first diversion valve is closed, allowing all the hot air to enter the equalization chamber.
[0012] Preferably, the temperature control device includes a first heat exchanger and a second heat exchanger. The tube side of the first heat exchanger is connected to the low-NOx environmentally friendly combustion chamber via a heat inlet pipe. A fresh air fan is connected to the shell side of the first heat exchanger. The first exhaust port of the shell side of the first heat exchanger is connected to the first air inlet of the shell side of the second heat exchanger via a ventilation pipe. A cold water inlet pump is connected to the tube side of the second heat exchanger. The ventilation pipe is provided with a first tee, and the other opening of the first tee is connected to an air supply pipe. The second exhaust port of the shell side of the second heat exchanger is connected to the air supply pipe via a second tee.
[0013] In this preferred embodiment, air heated by the low-NOx environmentally friendly combustion chamber flows through the tubes of the first heat exchanger, thus heating the air. The second heat exchanger cools the air using cold water. The air temperature during painting needs to be controlled at 20-25℃. Therefore, the process of heating or cooling the air is selected based on the supply air temperature. When heating is required, the hot air in the low-NOx environmentally friendly combustion chamber heats the fresh air. When the temperature is suitable, the fresh air fan directly sends the fresh air into the supply duct through the first three-way valve. When the temperature is too high, it is sent to the second heat exchanger for cooling before entering the supply duct through the second three-way valve. When cooling is required, the valve on the heat inlet pipe is closed, preventing the hot air in the low-NOx environmentally friendly combustion chamber from entering the tubes. As a result, the fresh air does not undergo heating after passing through the first heat exchanger tube and directly enters the second heat exchanger tube for heat exchange, thereby achieving cooling of the fresh air.
[0014] Preferably, the heat inlet pipe is also provided with a third tee located at the first heat exchange device, and another opening of the third tee is connected to a flushing pump.
[0015] In use, this preferred solution facilitates the flushing and cleaning of the tubes of the first heat exchanger by setting up a flushing pump. After cleaning, the other opening of the third tee is connected to a blower, which blows the water in the tubes clean.
[0016] Preferably, the heat inlet pipe is also provided with a second diversion valve located at the third tee, the second diversion valve is connected to the flue gas outlet, and the flue gas outlet is connected to the third exhaust port of the first heat exchanger tube.
[0017] When this preferred solution is used, if the temperature of the fresh air after heat exchange is detected to be too high, the second diversion valve is adjusted while reducing the amount of hot air entering, so that some of the hot air is directly discharged from the third exhaust port, thereby reducing the air volume of the hot air that exchanges heat with the fresh air in a timely manner, thus achieving rapid temperature regulation.
[0018] Preferably, the paint booth is also equipped with a flatbed truck for transporting pressure vessels.
[0019] The beneficial effects of this utility model are as follows: The air supply system is mainly used for introducing fresh air, and under the heat exchange of the temperature control device, it maintains a constant temperature and humidity to meet the requirements of painting. Through the setting of the equalizing chamber and the paint mist filtering exhaust device, a top-suction and bottom-suction ventilation method is adopted to achieve laminar air supply in the room. At the same time, the setting of the equalizing chamber ensures uniform air velocity. This solution not only meets the requirements of uniform indoor air velocity and air field, but also ensures that the paint mist generated during the painting process is captured in time, improving the operating environment. The temperature control device achieves stable temperature control and replaces manual operation. According to the different temperatures in the four seasons, the temperature control device can automatically adjust itself, thereby improving the yield, reducing waste, and reducing energy consumption. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the heat exchange device;
[0022] Figure 3 This is a top-down view of the air inlet.
[0023] As shown in the figure:
[0024] 1. Room body, 2. Equalizing chamber, 3. Air inlet, 4. Flatbed cart, 5. Air supply duct, 6. Paint mist filtration and exhaust device, 7. Air supply system, 8. Fresh air fan, 9. Ventilation pipe, 10. Second diversion valve, 11. First heat exchanger, 12. Second heat exchanger, 13. First diversion valve, 14. Third tee, 15. Third exhaust port, 16. First tee, 17. Second tee, 18. Fresh air inlet, 19. Heat inlet pipe. Detailed Implementation
[0025] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.
[0026] See attached document Figure 1-3 This utility model discloses a temperature-controlled spray booth for pressure vessels, comprising a booth body 1, which serves as an enclosed spraying area for pressure vessels. The booth body 1 employs a steel frame structure with external insulation panels, ensuring structural stability while effectively reducing energy loss. This design not only effectively isolates the booth from external temperature changes but also significantly reduces energy consumption.
[0027] The room 1 is also equipped with a flatbed cart 4 for transporting pressure vessels, mainly used for the pressure vessels to enter and exit the paint booth.
[0028] A pressure equalization chamber 2 is provided directly above the pressure vessel. The pressure equalization chamber 2 is connected to an air outlet. The air outlet is connected to an air supply system 7 through an air supply pipe 5. The air supply system 7 is equipped with a temperature control device.
[0029] The temperature control device includes a first heat exchange device 11 and a second heat exchange device 12. The tube side of the first heat exchange device 11 is connected to the low-NOx environmentally friendly combustion chamber through a heat inlet pipe 19. The shell side of the first heat exchange device 11 is connected to a fresh air fan 8. The first exhaust port of the shell side of the first heat exchange device 11 is connected to the first air inlet of the shell side of the second heat exchange device 12 through an air exchange pipe 9. The tube side of the second heat exchange device 12 is connected to a cold water inlet pump. The air exchange pipe 9 is provided with a first tee 16. The other opening of the first tee 16 is connected to an air supply pipe 5. The second exhaust port of the shell side of the second heat exchange device 12 is connected to the air supply pipe 5 through a second tee 17.
[0030] The heat inlet pipe 19 is also provided with a third tee 14 located at the first heat exchange device 11, and another opening of the third tee 14 is connected to a flushing pump.
[0031] The heat inlet pipe 19 is also provided with a second diversion valve 10 located at the third tee 14. The second diversion valve 10 is connected to the flue gas outlet, and the flue gas outlet is connected to the third exhaust port 15 of the tube side of the first heat exchange device 11.
[0032] Temperature sensors are installed on the heat inlet pipe 19, the air exchange pipe 9, the first tee 16, and the air supply pipe 5. Valves are installed on each opening of the first tee 16, the second tee 17, and the third tee 14.
[0033] The chamber 1 also has an exhaust vent located below the side of the pressure vessel, which is connected to a paint mist filtration exhaust device 6. This paint mist filtration exhaust device 6 is existing technology, primarily used to remove paint mist generated during spraying. It treats the paint mist through a dry paint mist purification system, effectively intercepting solid particles. Subsequently, volatile organic compounds are decomposed through a catalytic combustion treatment device, ultimately achieving compliant emissions with no air pollution.
[0034] The pressure vessel is also provided with an air inlet 3 located around the pressure equalization chamber 2 at an angle above it. The air supply pipe 5 is provided with a first diversion valve 13, which is connected to the air inlet 3 through the air supply pipe.
[0035] This solution also employs an advanced closed-loop digital PID controller. A multi-point temperature sensor network uses multiple sensors located in key areas to collect signals in real time and transmit them to the PID controller. The controller responds quickly based on the real-time temperature data. The PID controller parameters have been carefully calibrated to balance the speed and stability of temperature regulation, effectively avoiding problems such as excessive temperature fluctuations or regulation lag. When the system detects a temperature deviation from the set value, it quickly initiates heating or cooling measures to ensure the temperature is always maintained within the optimal range.
[0036] In use, the pressure vessel to be painted is placed into the paint booth via a transport flatbed trolley 4 and the booth door is closed. At this time, the temperature control device and the blower have been pre-started to adjust the indoor temperature to the optimal painting temperature, usually around 20-25°C.
[0037] During the painting process, different temperature parameters are selected based on the type of paint and the painting technique before the painting equipment is started. This precise control ensures stable temperature during the painting process, avoiding paint film defects caused by temperature fluctuations. The paint mist exhaust system is activated during painting to ensure that the indoor air quality remains within safe limits, thus protecting personnel safety.
[0038] After the painting is completed, the drying stage begins. The room temperature and airflow are adjusted according to the type of paint used and the coating thickness. For example, for thicker coatings, the temperature and airflow are moderately increased to accelerate solvent evaporation. This personalized drying solution not only improves efficiency but also effectively prevents coating quality problems caused by insufficient drying.
[0039] Final inspection and acceptance: After the painting and drying processes are completed, the pressure vessel undergoes a comprehensive inspection. Once no issues are found, it is moved out of the paint booth to complete the painting operation. The temperature control system continues to function during this stage to ensure a stable ambient temperature and prevent temperature fluctuations from affecting the accuracy of coating quality assessment.
[0040] The implementation of this solution has not only significantly improved paint quality but also greatly increased production efficiency. Compared to traditional painting methods, this method can complete high-quality painting operations in a shorter time while reducing rework rates caused by temperature issues, thereby lowering overall production costs.
[0041] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.
Claims
1. A temperature-controlled paint spray booth for pressure vessels, characterized by: The paint spraying room comprises a housing (1), an equalizing chamber (2) located above the pressure container, an air supply port communicated with the equalizing chamber (2), and an air exhaust port located below the side of the pressure container, the air supply port is connected with an air supply system (7) through an air supply pipe (5), the air supply system (7) is provided with a temperature control device, and the air exhaust port is connected with a paint mist filtering and air exhaust device (6).
2. The temperature-controlled paint spray booth for pressure vessels according to claim 1, characterized in that: The oblique upper side of the pressure container is further provided with an air inlet (3) located in the circumferential direction of the equalizing chamber (2), the air supply pipe (5) is provided with a first shunt valve (13), and the first shunt valve (13) is connected with the air inlet (3) through an air inlet pipe.
3. The temperature-controlled paint spray booth for pressure vessels according to claim 1, characterized in that: The temperature control device comprises a first heat exchange device (11) and a second heat exchange device (12), the tube side of the first heat exchange device (11) is connected with a low-nitrogen environmental protection combustion chamber through a heat inlet pipe (19), the shell side of the first heat exchange device (11) is connected with a fresh air fan (8), the first exhaust port of the shell side of the first heat exchange device (11) is communicated with the first air inlet of the shell side of the second heat exchange device (12) through an air exchange pipe (9), the tube side of the second heat exchange device (12) is connected with a cold water inlet pump, the air exchange pipe (9) is provided with a first three-way pipe (16), another opening of the first three-way pipe (16) is connected with the air supply pipe (5), and the second exhaust port of the shell side of the second heat exchange device (12) is connected with the air supply pipe (5) through a second three-way pipe (17).
4. The temperature-controlled paint spray booth for pressure vessels according to claim 3, characterized in that: The heat inlet pipe (19) is further provided with a third three-way pipe (14) located at the first heat exchange device (11), and another opening of the third three-way pipe (14) is connected with a flushing pump.
5. The temperature-controlled paint spray booth for pressure vessels according to claim 4, characterized in that: The heat inlet pipe (19) is further provided with a second shunt valve (10) located at the third three-way pipe (14), the second shunt valve (10) is connected with an exhaust port, and the exhaust port is communicated with the third exhaust port (15) of the tube side of the first heat exchange device (11).
6. The temperature-controlled paint spray booth for pressure vessels according to claim 1, characterized in that: The paint spraying room is further provided with a flat car (4) used for transporting the pressure container.