Architectural coating spray apparatus and spray method

Abstract

The application discloses a kind of building coating injection equipment and injection method, including main frame body, the main frame body inside installation has storage bin, storage bin side is provided with and is connected with coating pump, the main frame body both sides are equipped with lifting system, lifting system includes elevator, main frame body is close to the top of wall side and is equipped with horizontal displacement system, photoelectric sensor and visual identification module are installed on horizontal displacement system, horizontal longitudinal displacement system is also installed on the upper end surface of carrier, nozzle is installed on the longitudinal displacement system, nozzle is driven longitudinal displacement by longitudinal displacement system, nozzle is connected with coating pump and air compressor by hose, the horizontal displacement system and longitudinal displacement system have two sets, and symmetrically arranged, by with existing suspension system, tension machine cooperation use, realize high-rise outer wall surface spraying operation, high safety, and can effectively identify and avoid window position, real-time monitoring floor spraying quality, facilitate construction personnel timely adjustment parameter.

Description

Technical Field

[0001] This invention relates to the field of paint spraying equipment technology, specifically to a building paint equipment and spraying method. Background Technology

[0002] Spraying is a coating method that uses a spray gun or disc atomizer to disperse the material into uniform and fine droplets by pressure or centrifugal force and apply them to the surface of the object. It can be divided into air spraying, airless spraying, electrostatic spraying, and various derivatives of the above basic spraying methods.

[0003] Existing wall painting work on building exteriors usually requires manual operation or the use of portable equipment. Both of these methods are slow, inefficient, and labor-intensive. Furthermore, due to the limitations of manual labor, the paint cannot be applied evenly, resulting in poor paint quality.

[0004] The invention disclosed in application number CN202210190281.6 is an environmentally friendly material spraying device for building exterior walls, including a fixed base. Threaded holes are provided at the four corners of the bottom of the fixed base. Adjusting screws are threaded into the threaded holes. A universal wheel is fixedly connected to the bottom end of the adjusting screw. A wheel brake is provided at the top of the universal wheel. A placement groove is provided inside the fixed base. A first servo motor is fixedly connected to the top of the column. A threaded rod is rotatably connected inside the column. A slider is rotatably connected to the outer circumference of the threaded rod. A sliding plate is fixedly connected to the outer side of the slider. Limiting components are fixedly connected to both ends of the sliding plate on the side away from the column. A spraying component is disposed between the two limiting components. A cleaning component is fixedly connected to the bottom end of the sliding plate. A control console is fixedly connected to the top of the fixed base. While the above technical solutions achieve unmanned spraying and reduce labor intensity, they have the following drawbacks: 1. This type of equipment has a limited lifting height, making it unable to spray tall building exteriors. This necessitates the use of a suspended platform to raise the equipment to the working height for spraying, which is highly dangerous; 2. Even with a suspended platform, allowing for high-altitude operations, it cannot identify building windows during high-altitude spraying, resulting in paint spraying into the windows; 3. Due to the unmanned nature of the operation, it is impossible to identify and judge the spraying quality, thus making it impossible to adjust spraying parameters in real time.

[0005] On the other hand, the nozzles used are designed to operate under various spray conditions. Therefore, selecting the appropriate nozzle is crucial to achieving optimal spray performance during use. The characteristics of a nozzle are mainly reflected in its spray type, that is, the shape formed when the liquid leaves the nozzle orifice and its operational performance. Nozzles are named according to their spray shape, such as fan-shaped, cone-shaped, liquid column flow (i.e., jet), air atomizing, and flat nozzles. Conical nozzles are further divided into hollow cones and solid cones. The naming of Venturi nozzles (i.e., mixing nozzles), strong cold (hot) air blowers, and special nozzles (such as garden nozzles, tank washing nozzles, pipe cleaning nozzles, etc.) reflects the nozzle's operational performance.

[0006] In cold spraying, the paint is usually mixed with compressed air as it flows through the nozzle, causing the paint to be atomized and sprayed out. However, the atomization effect of nozzles with existing structures is poor. Summary of the Invention

[0007] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a building coating equipment and spraying method. By using it in conjunction with existing suspension systems and tension machines, it can realize the spraying operation of the exterior walls of high-rise buildings. On the one hand, it is highly safe, and more importantly, it can effectively identify and avoid window positions, monitor the spraying quality of the floor in real time, and facilitate the construction personnel to adjust the parameters in a timely manner.

[0008] The present invention is implemented as follows: a building coating spraying device is constructed, including a main frame, a material storage bin is installed inside the main frame, a coating pump connected to one side of the material storage bin, and a lifting system is installed on both sides of the main frame. The lifting system includes a hoist, which is used to connect with a steel cable corresponding to a suspension system installed on the roof of the building. The hoist achieves climbing or descending by the friction force generated by the engagement of the drive wheel and the steel wire rope.

[0009] A lateral displacement system is installed on the top side of the main frame near the wall, and photoelectric sensors and a visual recognition module are installed on the lateral displacement system.

[0010] The lateral displacement system is also equipped with a longitudinal displacement system that is set horizontally and longitudinally. The nozzle is installed on the longitudinal displacement system and the nozzle is driven to move longitudinally through the longitudinal displacement system. The nozzle is connected to the paint pump and air compressor through a hose.

[0011] There are two sets of horizontal displacement system and longitudinal displacement system, which are arranged symmetrically; they are responsible for spraying the left half and the right half respectively, in order to improve the efficiency of spraying.

[0012] The nozzle includes an inner cavity, an outer cavity, an inner sleeve, and a nozzle head. The outer cavity is sleeved outside the inner cavity. The tail of the inner cavity is integrally provided with a liquid inlet connector connected to a hose connected to the paint pump. The tail of the outer cavity is integrally provided with an air inlet connector connected to a hose connected to the compressor. The air inlet connector is sleeved outside the liquid inlet connector. The outer surface of the head of the outer cavity has external threads. The inner sleeve is disposed at the head of the inner and outer cavities. The inner sleeve includes a liquid inlet portion that can be embedded in the head of the inner cavity, an air inlet portion with an outer diameter equal to that of the inner cavity, and a baffle that contacts the head of the outer cavity. The liquid inlet portion has a liquid inlet hole at its center, and the outer surface of the air inlet portion has several airflow holes. The axes of the airflow holes are in the same plane and form a centripetal structure. The outer diameter of the baffle is larger than the inner diameter of the outer cavity and smaller than the inner diameter of the outer cavity. The outer diameter of the outer cavity; the nozzle is located at the head of the outer cavity, and the nozzle also includes a connecting part sleeved on the head of the outer cavity and a spraying part for spraying paint. The connecting part has an internal thread that matches the external thread. By tightening the nozzle, the stepped surface at the connection between the connecting part and the spraying part abuts against the baffle, thereby fixing the inner sleeve. At this time, the stepped surface at the connection between the air inlet and the liquid inlet contacts the end face of the head of the inner cavity to form a seal. The two end faces of the baffle respectively form seals with the outer cavity and the nozzle. A flow channel is opened in the center of the spraying part; the section of the flow channel near the inner sleeve forms an angle α, and the section of the flow channel away from the inner sleeve forms an angle β, where α is 45° and β is 10°; the diameter of the outer cavity is larger than the diameter of the air inlet pipe, and the diameter of the inner cavity is larger than the diameter of the liquid inlet pipe. When using the nozzle, gas enters the nozzle from the airflow hole, forming a rotating airflow through the airflow hole, and a negative pressure chamber is formed at the confluence of multiple airflows. When the gas-liquid two-phase fluid is ejected from the negative pressure chamber, the gas velocity is very high while the liquid velocity is not high. Therefore, the relative velocity between the two phases is high, the friction is large, and the airflow generates a strong shearing and tearing effect on the liquid, further atomizing the liquid. Moreover, due to the spiral effect, the liquid diffuses to the surroundings while being atomized, improving the atomization effect.

[0013] Furthermore, a lateral displacement system is installed on the top side of the main frame near the wall. This system includes a platform, a rack horizontally mounted on the top of the main frame, and the platform positioned above the rack. The platform is slidably mounted on a guide rail parallel to the rack and mounted on the top of the main frame via a slider. A first servo motor is mounted at the bottom of the platform, and a gear is mounted on the shaft of the first servo motor, meshing with the rack. The purpose of this arrangement is to provide the driving force for the lateral movement of the spray gun moving platform by having the first servo motor drive the gear to rotate and the gear and rack mesh.

[0014] Furthermore, the longitudinal displacement system includes a fixed platform and a carrier plate. Slide rails are installed on both sides of the top of the fixed platform, and protrusions are provided on the outer side of the slide rails. A connecting block is installed on the outer side of the bottom of the carrier plate, and a groove that mates with the protrusion is opened on the inner side of the connecting block. A guide groove is provided on the inner side of the slide rails. A drive wheel with its side embedded in the guide groove is installed on the bottom of the carrier plate. The drive wheel is connected to a second servo motor installed on the upper surface of the carrier plate. The second servo motor drives the drive wheel to rotate. The drive wheel rolls along the guide groove, causing the carrier plate to slide longitudinally. The nozzle is installed on the upper surface of the carrier plate. The nozzle is connected to a paint pump and an air compressor through a hose.

[0015] Furthermore, the system also includes an industrial control computer comprising a main control module, a data acquisition module, a servo circuit, and a communication module, wherein the data acquisition module, servo circuit, and communication module are connected to the main control module. The purpose of this setup is that the data acquisition module converts the data from the vision recognition module into signals recognizable by the main control module; the servo circuit is connected to the first and second servo motors to control their operation; and the communication module is used to transmit data with the ground workstation.

[0016] Furthermore, a dustproof box is fixedly installed on the upper surface of the platform. Inside the dustproof box are a photoelectric sensor and a vision recognition module. The photoelectric sensor can identify the position of the window and avoid it when it encounters a window position during the spraying process. The vision recognition module captures and stores the spraying image of the wall during the spraying process.

[0017] Furthermore, wall-mounted wheels are installed on the side of the main frame near the wall; this is to improve the stability of the equipment; rollers are also installed at the bottom of the main frame; this is to facilitate movement.

[0018] Furthermore, to enhance equipment safety, the lifting system also includes a fall protection monitoring device. This device monitors the tension between the wire rope and the hoist in real time, converting the tension into an electrical signal. This signal is then transmitted to the main control module for analysis and judgment. When an abnormal change in the tension value occurs, the main control module controls the actuator to stop working and transmits the data signal to the ground workstation via the communication module. The alarm at the ground workstation is activated, and ground personnel remotely lower the equipment to resolve the problem. This feature aims to improve equipment safety.

[0019] Furthermore, an extension frame is installed on the side of the main frame. A first connecting hole is opened on the side of the main frame where the rack and guide rail are installed. The extension frame has a second connecting hole corresponding to the first connecting hole on opposite sides. The two are fixed by inserting bolts into the first and second connecting holes and tightening them. The extension frame is equipped with an extension rack and extension guide rail corresponding to the rack and guide rail. The purpose of this setting is that, depending on the floor width, several extension frames can be installed on the side of the main frame to achieve spraying of floors of different widths.

[0020] Furthermore, during implementation, the material usage in the storage silo cannot be known in a timely manner. Therefore, when the paint in the silo runs out, it is impossible to add paint in time, affecting the equipment's spraying. To solve the above problem, a liquid level sensor is installed at the bottom of the storage silo. When the paint level is lower than the position of the liquid level sensor, the liquid level sensor sends a signal to the main control module. The main control module controls the paint pump, the first servo motor, and the second servo motor to stop working, the hoist lowers the equipment to the ground, and sends a signal to the ground workstation to add paint. The purpose of this setting is to facilitate the timely addition of paint by the staff.

[0021] A spraying method based on the above-mentioned architectural coating equipment is specifically operated as follows: During installation, the hoist is connected to the steel wire rope of the external suspension system, a tension machine is set at the bottom of the building, and the tension machine is connected to the suspension system through a stabilizing rope. The stabilizing rope is wound around the stabilizing wheel of the equipment.

[0022] During the first spraying, the main control module in the industrial computer controls the hoist. The hoist ascends or descends using the friction generated by the engagement of the drive wheel and the wire rope. After raising the equipment to the working height, the hoist stops. The main control module then controls the paint pump to pump paint from the storage hopper to the nozzles, which spray the paint in a fan shape onto the exterior wall. Simultaneously, the main control module sends a signal to the servo circuit, which controls the first servo motor to drive the gears. The gear and rack mesh, providing the driving force for the lateral movement of the spray gun moving platform, thus moving the nozzles laterally to spray the wall. At the same time, the vision recognition module captures an image of the sprayed wall and... The data is transmitted to the data transmission module for conversion, transforming it into a signal readable by the main control module. After reading the signal, the main control module transmits the data wirelessly to the ground workstation via the communication module. The ground workstation performs algorithm analysis and comparison to determine whether the spraying quality is up to standard. If it is not up to standard, an instruction is sent to the main control module, which controls the second servo motor to drive the drive wheel to rotate, causing the drive wheel to roll along the guide groove, thereby driving the carrier plate to slide longitudinally and adjusting the distance between the nozzle and the wall. At the same time, the flow rate of the paint pump and the speed of the first servo motor are adjusted until the spraying effect reaches the preset effect. If it is up to standard, the spraying continues according to the planned spraying line.

[0023] When a window is encountered, the photoelectric sensor identifies the window position and transmits a signal to the main control module. The main control module then controls the paint pump to stop working until the photoelectric sensor detects that the window area has been left. At this point, the main control module controls the paint pump to continue working.

[0024] During the spraying process, the anti-fall monitoring device monitors the tension between the wire rope of the suspension system and the hoist in real time, and converts the tension into an electrical signal. The electrical signal is then transmitted to the main control module for analysis and judgment. When the tension value changes abnormally, the main control module controls the actuator to stop working and transmits the data signal to the ground workstation through the communication module. The alarm at the ground workstation is activated, and the ground staff lowers the equipment remotely to troubleshoot the problem.

[0025] A liquid level sensor is installed at the bottom of the storage silo. During the spraying process, when the paint level is lower than the position of the liquid level sensor, the liquid level sensor sends a signal to the main control module. The main control module controls the paint pump, the first servo motor, and the second servo motor to stop working. The hoist lowers the equipment to the ground and sends a signal to the ground workstation to add paint.

[0026] The architectural coating equipment of the present invention has the following advantages:

[0027] 1. This invention controls the hoist through a central control module in an industrial computer. The hoist ascends or descends using the friction generated by the engagement of the drive wheel and the wire rope. After raising the equipment to the working height, the hoist stops working, and the central control module in the industrial computer controls the paint pump to pump the paint from the storage hopper to the nozzle. Under the action of compressed air, the paint is atomized and sprayed in a fan shape onto the exterior wall. At the same time, the central control module in the industrial computer sends a signal to the servo circuit, which controls the first servo motor to drive the gear to rotate. The gear and rack mesh, providing the driving force for the lateral movement of the spray gun moving platform, which in turn moves the nozzle laterally to spray the wall. This achieves unmanned spraying of the building's exterior wall and can adapt to the building's height, making it convenient to use.

[0028] 2. This invention uses a visual recognition module to capture images of the sprayed wall surface and transmits them to a data transmission module for conversion. The converted images are then converted into signals that can be read by the main control module. After the main control module reads the signals, the communication module transmits the data wirelessly to the ground workstation. The ground workstation performs algorithm analysis and comparison to determine whether the spraying quality is up to standard. This facilitates real-time monitoring of the floor spraying quality and allows construction personnel to adjust parameters in a timely manner.

[0029] 3. After the photoelectric sensor identifies the window position, the present invention transmits a signal to the main control module. The main control module controls the paint pump to stop working until the photoelectric sensor identifies that it has left the window area. Then the main control module controls the paint pump to continue working, thereby effectively identifying and avoiding the window position.

[0030] 4. During the spraying process, the present invention monitors the tension between the wire rope of the suspension system and the hoist in real time through the anti-fall monitoring device, and converts the tension into an electrical signal, which is transmitted to the main control module for analysis and judgment. When the tension value changes abnormally, the main control module controls the actuator to stop working and transmits the data signal to the ground workstation through the communication module. The alarm of the ground workstation is activated, and the ground staff lowers the equipment remotely to eliminate the problem.

[0031] 5. A liquid level sensor is installed in the lower part of the storage bin of the present invention. During the spraying process, when the paint level is lower than the position of the liquid level sensor, the liquid level sensor sends a signal to the main control module. The main control module controls the paint pump, the first servo motor and the second servo motor to stop working, the hoist lowers the equipment to the ground and sends a signal to the ground workstation to add paint.

[0032] 6. This invention includes a lateral displacement system installed on the top side of the main frame near the wall. The lateral displacement system comprises a platform, a rack horizontally mounted on the top of the main frame, and the platform positioned above the rack. The platform is slidably mounted on a guide rail parallel to the rack and mounted on the top of the main frame via a slider. A first servo motor is mounted at the bottom of the platform, and a gear is mounted on the shaft of the first servo motor, meshing with the rack. The purpose of this arrangement is to provide the driving force for the lateral movement of the spray gun moving platform by having the first servo motor drive the gear to rotate and the gear and rack mesh. The longitudinal displacement system includes a fixed platform and a carrier plate. Slide rails are mounted on both sides of the top of the fixed platform, with protrusions on the outer sides of the slide rails. A connecting block is mounted on the outer bottom of the carrier plate, with a groove on its inner side that mates with the protrusions. A guide groove is provided on the inner side of the slide rails. A drive wheel with its side embedded in the guide groove is mounted on the bottom of the carrier plate. The drive wheel is connected to a second servo motor mounted on the upper surface of the carrier plate. The second servo motor drives the drive wheel to rotate, causing it to roll along the guide groove and slide the carrier plate longitudinally. A nozzle is mounted on the upper surface of the carrier plate, and the nozzle is connected to a paint pump and an air compressor via a hose. The purpose of this arrangement is that the second servo motor drives the drive wheel to rotate, causing it to roll along the guide groove and slide the carrier plate longitudinally.

[0033] 7. The main frame of the present invention is equipped with an extension frame on its side. A first connecting hole is provided on the side of the main frame where the rack and guide rail are installed. The extension frame has a second connecting hole corresponding to the first connecting hole on its opposite sides. The two are fixed by inserting bolts into the first connecting hole and the second connecting hole and tightening them. The extension frame is equipped with an extension rack and an extension guide rail corresponding to the rack and guide rail. The purpose of this setting is that, according to the width of the floor, several extension frames can be installed on the side of the main frame, so that spraying of floors of different widths can be achieved.

[0034] 8. In the implementation of this invention, the usage of materials in the storage silo cannot be known in a timely manner. Therefore, when the paint in the storage silo is used up, it is impossible to add paint in time, which affects the spraying of the equipment. In order to solve the above problem, a liquid level sensor is installed in the lower part of the storage silo. When the paint level is lower than the position of the liquid level sensor, the liquid level sensor sends a signal to the main control module. The main control module controls the paint pump, the first servo motor and the second servo motor to stop working, the hoist lowers the equipment to the ground, and sends a signal to the ground workstation to add paint. The purpose of this setting is to facilitate the timely addition of paint by the staff.

[0035] 9. Gas enters the nozzle through the airflow orifice and forms a rotating airflow. A negative pressure chamber is formed at the confluence of multiple airflows. When the gas-liquid two-phase fluid is ejected from the negative pressure chamber, the relative velocity between the two phases is relatively high due to the high velocity of the gas and the low velocity of the liquid. This results in high friction and strong shearing and tearing action of the airflow on the liquid, further atomizing the liquid. Furthermore, due to the spiral action, the liquid diffuses to the surroundings while being atomized, improving the atomization effect.

[0036] By designing the flow channel at an angle α near the inner sleeve section and at an angle β away from the flow channel section, with α set to 45° and β set to 10°, friction of the coating on the inner wall of the nozzle is reduced, and the backflow and circulation of fluid caused by flow diversion on the inner wall are reduced. This avoids powder flying or excessive powder adhering to the inner wall of the channel, resulting in poor coating deposition. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a front view of the present invention;

[0039] Figure 3 This is a side view of the present invention;

[0040] Figure 4 This is a top view of the present invention;

[0041] Figure 5 yes Figure 2 Enlarged view of a section at point I;

[0042] Figure 6 This is a schematic diagram of the internal structure of the storage silo;

[0043] Figure 7 This is a schematic diagram of the longitudinal movement system;

[0044] Figure 8 This is a schematic diagram of the dustproof box part of the present invention;

[0045] Figure 9 This is a schematic diagram of the extended track structure;

[0046] Figure 10 This is a schematic diagram of the control module structure of the present invention;

[0047] Figure 11 This is a schematic diagram of the modular structure of an industrial control computer;

[0048] Figure 12 This is a schematic diagram of the module structure of the system.

[0049] Figure 13 This is a schematic diagram of the nozzle structure;

[0050] Figure 14 This is a schematic diagram of the inner sleeve structure;

[0051] Figure 15 yes Figure 14 Sectional view of AA.

[0052] In the diagram: 1. Main frame; 1-1. First connecting hole; 2. Roller; 3. Storage bin; 4. Paint pump; 5. Lifting system; 5-1. Hoist; 5-2. Fall protection monitoring device; 6. Dustproof box; 7. Nozzle; 7-1. Outer cavity; 7-2. Inner cavity; 7-3. Inner sleeve; 7-3a. Liquid inlet; 7-3b. Air inlet; 7-3c. Baffle; 7-3d. Airflow hole; 7-3e. Liquid inlet hole; 7-4. Spray head; 7-4a. Connecting part; 7-4b. Flow channel; 7-4c. Spraying part; 7-5. Air inlet pipe; 7-6. Liquid inlet pipe; 8. Platform; 9. 10. Guide rail; 11. Rack; 12. Extension guide rail; 13. Fixed platform; 14. Slide rail; 15. Connecting block; 16. Wall-mounted wheel; 17. Gear; 18. Liquid level sensor; 19. Carrier plate; 20. Second servo motor; 21. Ground workstation; 22. Photoelectric sensor; 23. Vision recognition module; 24. Industrial control computer; 23-1. Main control module; 23-2. Data acquisition module; 23-3. Servo circuit; 23-4. Communication module; 25. Drive wheel; 26. Extension frame; 27. Second connecting hole; 28. Extension rack; 29. ​​Air compressor. Detailed Implementation

[0053] The following will be combined with the appendix Figures 1-15This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0054] This invention provides a building coating equipment, including a main frame 1, a storage bin 3 installed inside the main frame 1, a coating pump 4 connected to one side of the storage bin 3, and a lifting system 5 installed on both sides of the main frame 1. The lifting system 5 includes a hoist 5-1, which is connected to a steel cable of a suspension system installed on the roof. The hoist achieves climbing or descending by the friction force generated by the engagement of the drive wheel and the steel cable.

[0055] A lateral displacement system is installed on the top side of the main frame 1 near the wall. The lateral displacement system includes a platform 8 and a rack 10 horizontally mounted on the top of the main frame 1. The platform 8 is positioned above the rack 10 and is slidably mounted on a guide rail 9 that is parallel to the rack 10 and mounted on the top of the main frame 1 via a slider. A first servo motor is installed at the bottom of the platform 8. A gear 16 is mounted on the shaft of the first servo motor and meshes with the rack 10. The first servo motor drives the gear 16 to rotate, and the gear and rack mesh to provide the driving force for the lateral movement of the spray gun moving platform.

[0056] A dustproof box 6 is fixedly installed on the upper surface of the platform 8. A photoelectric sensor 21 and a vision recognition module 22 are installed inside the dustproof box 6. The photoelectric sensor 21 can identify the window position and avoid it when it encounters a window position during the spraying process. The vision recognition module 22 captures and stores the spraying image of the wall during the spraying process.

[0057] The upper surface of the platform 8 is also equipped with a longitudinal displacement system arranged horizontally and longitudinally, including a fixed platform 12 and a carrier plate 18. The fixed platform 12 has slide rails 13 installed on both sides of its top. The slide rails 13 have protrusions on their outer sides. The carrier plate 18 has a connecting block 14 installed on its bottom outer side. The inner side of the connecting block 14 has a groove that matches the protrusion. The slide rails 13 have guide grooves on their inner sides. The bottom of the carrier plate 18 has a drive wheel 24 that is embedded in the guide groove on its side. The drive wheel 24 is connected to a second servo motor 19 installed on the upper surface of the carrier plate 18. The second servo motor 19 drives the drive wheel 24 to rotate. The drive wheel 18 rolls along the guide groove, causing the carrier plate 18 to slide longitudinally. The upper surface of the carrier plate has a nozzle 7 installed. The nozzle 7 is connected to the paint pump 4 and the air compressor 27 through a hose.

[0058] There are two sets of the aforementioned horizontal displacement system and longitudinal displacement system, arranged symmetrically, responsible for spraying the left and right halves respectively, in order to improve the efficiency of spraying.

[0059] All of the aforementioned actuators are controlled by an industrial control computer 23. The industrial control computer 23 includes a main control module 23-1, a data acquisition module 23-2, a servo circuit 23-3, and a communication module 23-4. The data acquisition module 23-2, the servo circuit 23-3, and the communication module 23-4 are connected to the main control module 23-1. The data acquisition module 23-2 converts the data from the vision recognition module 22 into signals that can be recognized by the main control module 23-1. The servo circuit 23-3 is connected to the first servo motor and the second servo motor 19 and is used to control the operation of the servo motors. The communication module 23-4 is used to realize data transmission with the ground workstation 20.

[0060] To improve the atomization effect of the coating, nozzle 7 can be used as follows: Figures 13-15 The structure shown includes an inner cavity 7-2, an outer cavity 7-1, an inner sleeve 7-3, and a nozzle 7-4. The outer cavity 7-1 is fitted over the inner cavity 7-2. The tail of the inner cavity 7-2 is integrally provided with a liquid inlet pipe 7-6 connected to a hose communicating with the paint pump. The tail of the outer cavity 7-1 is integrally provided with an air inlet pipe 7-5 connected to a hose communicating with the compressor. The air inlet pipe 7-5 is fitted over the liquid inlet pipe 7-6. The outer surface of the head of the outer cavity 7-1 is provided with external threads. The inner sleeve 7-2 is disposed at the head of the inner cavity 7-2 and the outer cavity 7-1. The inner sleeve 7-2 includes a liquid inlet portion 7-3a that can be embedded in the head of the inner cavity 7-2, an air inlet portion 7-3b with the same outer diameter as the inner cavity 7-2, and a baffle 7-3 that contacts the head of the outer cavity 7-1. The liquid inlet portion 7-3a has a liquid inlet hole 7-3e in the center, and the outer surface of the air inlet portion 7-3b has several airflow holes. The axes of the holes 7-3b and 7-3b are in the same plane and form a centripetal structure. The outer diameter of the baffle 7-3c is larger than the inner diameter of the outer cavity 7-1 and smaller than the outer diameter of the outer cavity 7-1. The nozzle 7-3 is located at the head of the outer cavity 7-1. The nozzle 7-3 includes a connecting part 7-4a sleeved on the head of the outer cavity 7-1 and a spraying part 7-3c for spraying paint. The connecting part 7-4a has an internal thread that matches the external thread. By tightening the nozzle, the stepped surface at the connection between the connecting part 7-4a and the spraying part 7-4c abuts against the baffle 7-3c, thereby fixing the inner sleeve 7-3. At this time, the stepped surface at the connection between the air inlet 7-3b and the liquid inlet 7-3a contacts the end face of the head of the inner cavity 7-2 to form a seal. The two end faces of the baffle 7-3c respectively form a seal with the outer cavity 7-1 and the nozzle 7-4. A flow channel 7-4b is opened in the center of the spraying part 7-4c.

[0061] In use, gas enters the nozzle through the airflow orifice, forming a rotating airflow. A negative pressure chamber is formed at the confluence of multiple airflows. When the gas-liquid two-phase fluid is ejected from the negative pressure chamber, the relative velocity between the two phases is high due to the high velocity of the gas and the low velocity of the liquid. This results in high friction and strong shearing and tearing action of the airflow on the liquid, further atomizing the liquid. Furthermore, due to the spiral action, the liquid diffuses in all directions while being atomized, improving the atomization effect.

[0062] Because traditional spraying channels are mostly straight or narrow at the front and wide at the back, the coating deposition effect is not obvious. Therefore, to solve this problem, the flow channel 7-4b is at an angle α near the inner sleeve 7-3 section, and at an angle β away from the 7-3 section, where α is 45° and β is 10°. This reduces the friction of the paint on the inner wall of the spray nozzle, reduces fluid diversion on the inner wall causing backflow and circulation, and thus avoids powder flying or excessive powder adhering to the inner wall of the channel, resulting in poor coating deposition.

[0063] Furthermore, the diameter of the outer cavity 7-1 is larger than the diameter of the air inlet pipe 7-5, and the diameter of the inner cavity 7-2 is larger than the diameter of the liquid inlet pipe 7-6. When compressed air is introduced, the pressure difference between the larger inner diameter end and the smaller inner diameter end is more easily satisfied, so that the compressed air in the outer cavity and the coating in the inner cavity can be mixed more smoothly.

[0064] The spraying method of this equipment is described in detail below;

[0065] During installation, the existing suspension system corresponding to the technology is placed on the top platform of the building. The steel wire rope of the suspension system is connected to the hoist 5-1. A tension machine is set up at the bottom of the building and connected to the suspension system through a stabilizing rope. The stabilizing rope is wound around the stabilizing wheel installed on the equipment.

[0066] During the first spraying, the main control module 23-1 in the industrial control computer 23 controls the hoist 5-1 to operate. The hoist climbs or descends through the friction generated by the engagement of the drive wheel and the wire rope. After raising the equipment to the working height, the hoist 5-1 stops working. The main control module 23-1 in the industrial control computer 23 then controls the paint pump 4 to operate, pumping the paint from the storage bin 3 to the nozzle 7. Under the action of compressed air, the paint is atomized and sprayed in a fan shape onto the exterior wall surface from the nozzle 7. At the same time, the main control module 23-1 in the industrial control computer 23 sends a signal to the servo circuit 23-3. The servo circuit 23-3 controls the first servo motor to operate, driving the gear 16 to rotate. The gear and rack mesh, providing the driving force for the lateral movement of the spray gun moving platform, drives the nozzle 7 to move laterally, and sprays the wall surface. Simultaneously, the vision recognition module 22 monitors the image of the sprayed wall surface. The data is captured and transmitted to the data transmission module 23-2 for conversion, transforming it into a signal readable by the main control module 23-1. After reading the signal, the main control module 23-1 transmits the data wirelessly to the ground workstation 20 via the communication module 23-4. The ground workstation 20 performs algorithm analysis and comparison to determine whether the spraying quality is up to standard. If it is not up to standard, an instruction is sent to the main control module 23-1, which controls the second servo motor 19 to drive the drive wheel 24 to rotate. The drive wheel 18 rolls along the guide groove, causing the carrier plate 18 to slide longitudinally, adjusting the distance between the nozzle and the wall. At the same time, the flow rate of the paint pump 4 and the speed of the first servo motor are adjusted until the spraying effect reaches the preset effect. If it is up to standard, the spraying continues according to the planned spraying line.

[0067] When a window is encountered, the photoelectric sensor 21 identifies the window position and transmits a signal to the main control module 23-1. The main control module controls the paint pump 4 to stop working until the photoelectric sensor 21 identifies that it has left the window area, at which point the main control module controls the paint pump 4 to continue working.

[0068] To improve the stability of the equipment, wall-mounted wheels 15 can be installed on the side of the main frame 1 near the wall.

[0069] To improve equipment safety, the hoisting system 5 also includes a fall protection monitoring device 5-2, which monitors the tension between the wire rope and the hoist 5-1 in real time and converts the tension into an electrical signal. This signal is then transmitted to the main control module 23-1 for analysis and judgment. When the tension value changes abnormally, the main control module 23-1 controls the actuator to stop working and transmits the data signal to the ground workstation via the communication module 23-4. The alarm at the ground workstation 20 is activated, and ground personnel remotely lower the equipment to resolve the problem.

[0070] To facilitate equipment movement, rollers 2 can be installed at the bottom of the main frame 1.

[0071] Due to the limited width of the equipment body, its spraying range is limited. To solve this problem, an extension frame 25 can be installed on the side of the main frame 1. A first connecting hole 1-1 is opened on the side of the main frame 1 where the rack and guide rail are installed. The extension frame 25 has second connecting holes 25-1 on opposite sides, corresponding to the first connecting hole 1-1. The two are fixed by inserting bolts into the first connecting hole 1-1 and the second connecting hole 25-1 and tightening them. The extension frame 25 is equipped with an extension rack 26 and an extension guide rail 11 corresponding to the rack 10 and guide rail 9.

[0072] Depending on the floor width, several extension frames can be installed on the side of the main frame 1 to achieve spraying of floors of different widths.

[0073] Because the material usage in storage silo 3 cannot be known in a timely manner, when the paint in storage silo 3 runs out, it is impossible to add paint in time, which affects the equipment spraying. In order to solve the above problem, a liquid level sensor 17 is installed in the lower part of storage silo 3. When the paint level is lower than the position of liquid level sensor 17, liquid level sensor 17 sends a signal to the main control module 23-1. The main control module 23-1 controls the paint pump 4, the first servo motor and the second servo motor 19 to stop working, the hoist 5-1 lowers the equipment to the ground, and sends a signal to the ground workstation 20 to add paint.

Claims

1. A building coating spraying device, comprising a main frame, wherein a material storage bin is installed inside the main frame, characterized in that, A spraying machine is connected to one side of the storage silo, and a lifting system is installed on both sides of the main frame. The lifting system includes a hoist, which is used to connect with the steel cable corresponding to the suspension system installed on the roof of the building. The hoist achieves climbing or descending by the friction generated by the engagement of the drive wheel and the steel wire rope. A lateral displacement system is installed on the top side of the main frame near the wall, and photoelectric sensors and a visual recognition module are installed on the lateral displacement system. The lateral displacement system is also equipped with a longitudinal displacement system that is set horizontally and longitudinally. The nozzle is installed on the longitudinal displacement system and the nozzle is driven to move longitudinally through the longitudinal displacement system. The nozzle is connected to the paint pump and air compressor through a hose. There are two sets of horizontal and vertical displacement systems, arranged symmetrically; they are responsible for spraying the left and right halves respectively, in order to improve the efficiency of spraying. The nozzle includes an inner cavity, an outer cavity, an inner sleeve, and a nozzle head. The outer cavity is sleeved outside the inner cavity. The tail of the inner cavity is integrally provided with a liquid inlet connector connected to a hose connected to the paint pump. The tail of the outer cavity is integrally provided with an air inlet connector connected to a hose connected to the compressor. The air inlet connector is sleeved outside the liquid inlet connector. The outer surface of the head of the outer cavity has external threads. The inner sleeve is disposed at the head of the inner and outer cavities. The inner sleeve includes a liquid inlet portion that can be embedded in the head of the inner cavity, an air inlet portion with an outer diameter equal to that of the inner cavity, and a baffle that contacts the head of the outer cavity. The liquid inlet portion has a liquid inlet hole at its center, and the outer surface of the air inlet portion has several airflow holes. The axes of the airflow holes are in the same plane and form a centripetal structure. The outer diameter of the baffle is larger than the inner diameter of the outer cavity and smaller than the inner diameter of the outer cavity. The outer diameter of the outer cavity; the nozzle is located at the head of the outer cavity, and the nozzle also includes a connecting part sleeved on the head of the outer cavity and a spraying part for spraying paint. The connecting part has an internal thread that matches the external thread. By tightening the nozzle, the stepped surface at the connection between the connecting part and the spraying part abuts against the baffle, thereby fixing the inner sleeve. At this time, the stepped surface at the connection between the air inlet and the liquid inlet contacts the end face of the head of the inner cavity to form a seal. The two end faces of the baffle respectively form a seal with the outer cavity and the nozzle. A flow channel is opened in the center of the spraying part; the flow channel is at an angle α near the inner sleeve and at an angle β away from the inner sleeve. α is 45° and β is 10°. The diameter of the outer cavity is larger than the diameter of the air inlet pipe, and the diameter of the inner cavity is larger than the diameter of the liquid inlet pipe. The architectural coating spraying equipment adopts the following spraying method, and the specific operation is as follows: During installation, the hoist is connected to the steel wire rope of the external suspension system, a tension machine is set at the bottom of the building, and it is connected to the suspension system through a stabilizing rope. The stabilizing rope is wrapped around the stabilizing wheel of the equipment. During the first spraying, the main control module in the industrial computer controls the hoist. The hoist ascends or descends using the friction generated by the engagement of the drive wheel and the wire rope. After raising the equipment to the working height, the hoist stops. The main control module then controls the spraying machine to pump paint from the storage hopper to the nozzles, which then spray the paint in a fan shape onto the exterior wall. Simultaneously, the main control module sends a signal to the servo circuit, which controls the first servo motor to drive the gears. The gear and rack mesh, providing the driving force for the lateral movement of the spray gun moving platform, thus moving the nozzles laterally to spray the wall. At the same time, the vision recognition module captures an image of the sprayed wall and... The data is transmitted to the data transmission module for conversion, transforming it into a signal readable by the main control module. After reading the signal, the main control module transmits the data wirelessly to the ground workstation via the communication module. The ground workstation performs algorithm analysis and comparison to determine whether the spraying quality is up to standard. If it is not up to standard, an instruction is sent to the main control module, which controls the second servo motor to drive the drive wheel to rotate, causing the drive wheel to roll along the guide groove, thereby driving the carrier plate to slide longitudinally and adjusting the distance between the nozzle and the wall. At the same time, the flow rate of the paint pumped out by the sprayer and the speed of the first servo motor are adjusted until the spraying effect reaches the preset effect. If it is up to standard, the spraying continues according to the planned spraying line. When the photoelectric sensor detects the window position, it transmits a signal to the main control module. The main control module then controls the sprayer to stop working until the photoelectric sensor detects that the sprayer has left the window area. The main control module then controls the sprayer to continue working. During the spraying process, the anti-fall monitoring device monitors the tension between the wire rope of the suspension system and the hoist in real time, and converts the tension into an electrical signal. The electrical signal is then transmitted to the main control module for analysis and judgment. When the tension value changes abnormally, the main control module controls the actuator to stop working and transmits the data signal to the ground workstation through the communication module. The alarm at the ground workstation is activated, and the ground staff lowers the equipment remotely. A liquid level sensor is installed at the bottom of the storage hopper. During the spraying process, when the paint level is lower than the position of the liquid level sensor, the liquid level sensor sends a signal to the main control module. The main control module controls the sprayer, the first servo motor, and the second servo motor to stop working, the hoist lowers the equipment to the ground, and sends a signal to the ground workstation to add paint.

2. The architectural coating spraying equipment according to claim 1, characterized in that, A lateral displacement system is installed on the top side of the main frame near the wall. The lateral displacement system includes a platform and a rack horizontally installed on the top of the main frame. The platform is positioned above the rack and is slidably mounted on a guide rail that is parallel to the rack and installed on the top of the main frame via a slider. A first servo motor is installed at the bottom of the platform. A gear is installed on the shaft of the first servo motor and meshes with the rack. Its function is to drive the gear to rotate through the first servo motor. The meshing of the gear and rack provides the driving force for the lateral movement of the spray gun moving platform.

3. The architectural coating spraying equipment according to claim 1, characterized in that, The longitudinal displacement system includes a fixed platform and a carrier plate. Slide rails are installed on both sides of the top of the fixed platform. Protrusions are provided on the outer side of the slide rails. A connecting block is installed on the outer side of the bottom of the carrier plate. A groove that mates with the protrusion is opened on the inner side of the connecting block. A guide groove is provided on the inner side of the slide rail. A drive wheel with its side embedded in the guide groove is installed on the bottom of the carrier plate. The drive wheel is connected to a second servo motor installed on the upper surface of the carrier plate. The second servo motor drives the drive wheel to rotate, causing the drive wheel to roll along the guide groove and drive the carrier plate to slide longitudinally. The nozzle is installed on the upper surface of the carrier plate.

4. The architectural coating spraying equipment according to claim 1, characterized in that, It also includes an industrial control computer comprising a main control module, a data acquisition module, a servo circuit, and a communication module. The data acquisition module, servo circuit, and communication module are connected to the main control module. The data acquisition module converts the data from the vision recognition module into signals that the main control module can recognize. The servo circuit is connected to the first servo motor and the second servo motor to control the operation of the servo motors. The communication module is used to realize data transmission with the ground workstation.

5. The architectural coating spraying equipment according to claim 2, characterized in that, A dustproof box is fixedly installed on the upper surface of the platform. Inside the dustproof box are a photoelectric sensor and a vision recognition module. The photoelectric sensor can identify the position of the window and avoid it when it encounters a window position during the spraying process. The vision recognition module captures and stores the spraying image of the wall during the spraying process.

6. The architectural coating spraying equipment according to claim 1, characterized in that, The main frame is equipped with wall-mounted wheels near the wall to improve the stability of the equipment; the bottom of the main frame is equipped with rollers for easy movement.

7. The architectural coating spraying equipment according to claim 1, characterized in that, The hoisting system also includes a fall protection monitoring device, which monitors the tension between the wire rope and the hoist in real time and converts the tension into an electrical signal. This signal is then transmitted to the main control module for analysis and judgment. When the tension value changes abnormally, the main control module controls the actuator to stop working and transmits the data signal to the ground workstation via the communication module. The alarm at the ground workstation is activated, and ground personnel lower the equipment remotely.

8. The architectural coating spraying equipment according to claim 1 or 6, characterized in that, An extension frame is installed on the side of the main frame. A first connecting hole is opened on the side of the main frame where the rack and guide rail are installed. The extension frame has a second connecting hole corresponding to the first connecting hole on opposite sides. The two are fixed by inserting bolts into the first and second connecting holes and tightening them. The extension frame is equipped with an extension rack and extension guide rail corresponding to the rack and guide rail. Its function is to install several extension frames on the side of the main frame according to the floor width, so as to realize the spraying of floors of different widths.

9. The architectural coating spraying equipment according to claim 1, characterized in that, A liquid level sensor is installed at the bottom of the storage silo. When the paint level is lower than the position of the liquid level sensor, the liquid level sensor sends a signal to the main control module. The main control module controls the sprayer, the first servo motor, and the second servo motor to stop working. The hoist lowers the equipment to the ground and sends a signal to the ground workstation to add paint, so that the staff can add paint in time.

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