Automatic powder changing large cyclone powder recycling room and powder spraying gun

Abstract

The utility model relates to the technical field of powder spraying, and particularly discloses an automatic powder changing large cyclone powder recovery room and a powder spraying gun, which comprise a powder supply system, a back flushing type cyclone dust removal system and a filter element filter, the reverse blowing type cyclone dust removal system and the filter element filter are respectively used for recycling and treating redundant powder generated in the spraying process; the curing system and the cooling system are used for heating and curing the sprayed workpiece, the curing system and the cooling system are used for heating and curing the sprayed workpiece and cooling the sprayed workpiece respectively, and the filter element filter serves as a secondary filter device and further filters out fine dust in air. And the purity of the recycled powder is ensured, meanwhile, pollution of dust to the environment is avoided, and the uniformity and consistency of the powder coating in the spraying process are ensured through a stable and accurate powder supply system.

Description

Technical Field

[0001] The utility model relates to the technical field of powder spraying, and in particular discloses an automatic powder-changing large cyclone powder recovery room and a powder spraying gun. Background Art

[0002] A spray gun is a device that uses the rapid release of liquid or compressed air as power. There are two types of spray guns: standard pressure and pressurized. There are also pressure-type spray guns, Carel-type spray guns, and automatic recovery types. In industrial applications, spray guns can be used directly with paint. These simple spray guns can be installed in automated equipment such as automatic glue sprayers, automatic glue applicators, automatic paint sprayers, and coating machines.

[0003] In the prior art, the nozzles used in automatic powder spray guns only have the simple function of spraying powder. In some powder spraying equipment that requires frequent and rapid powder replacement, the existing spray guns need to clean the powder residue in the nozzle when changing powder. The cleaning is often carried out by performing dry spraying in the spray chamber or replacing the nozzle. The use of dry spraying to clean the residual powder not only wastes the powder, but also makes it easy for the powder to fly in the spray chamber because there is no spraying target after spraying, which has a greater adverse effect on the working environment. If the nozzle replacement method is adopted, the efficiency is very low. Utility Model Content

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a large cyclone powder recovery room and a powder spray gun with automatic powder replacement.

[0005] To achieve the above-mentioned purpose, the utility model provides an automatic powder-changing large cyclone powder recovery room and a powder spray gun, which include a powder supply system, a back-blowing cyclone dust removal system and a filter element filter. The powder supply system is used to provide powder coating for spraying, and the back-blowing cyclone dust removal system and the filter element filter are respectively used to recover and process excess powder generated during the spraying process; it also includes a curing system and a cooling system for heating and curing the workpiece after spraying. The curing system and the cooling system are respectively used for heating and curing and cooling the workpiece after spraying.

[0006] Preferably, the powder supply system includes a powder spraying room, a powder pipeline arranged in the powder spraying room, and a powder spray gun connected to the powder pipeline. The powder supply system also includes a powder storage tank connected to the powder pipeline and a powder pump for supplying the powder in the powder storage tank to the powder spray gun. As a storage container for powder coating, the powder storage tank can stably store a large amount of powder coating to ensure continuous powder supply during the production process. The tank body is made of highly sealed and moisture-proof materials to prevent the powder from getting damp and agglomerating, which affects the spraying quality. The powder pump serves as a power source to evenly and continuously transport the powder in the powder storage tank to the powder spray gun. By precisely controlling the delivery speed and pressure of the powder pump, accurate supply of powder coating can be achieved, thereby improving spraying efficiency and quality.

[0007] Preferably, the powder spray gun is used to spray a uniform and dense coating on demand. The powder spray gun is provided with a flow meter used in conjunction with the powder spray gun, which is connected to the powder spray gun through a delivery pipe to form a closed-loop system for powder supply. The powder pump draws powder from the storage tank, adjusts the flow rate through the flow meter, and then sends it to the powder spray gun through the delivery pipe for spraying. The flow meter provided on the powder spray gun can monitor and adjust the flow rate of powder in real time to ensure that the supply amount of powder during the spraying process is accurate and controllable, avoiding coating quality problems caused by uneven powder supply. Due to the precise control of the powder supply amount, the powder spray gun can spray a uniform and dense coating on demand, which can have better adhesion, corrosion resistance and wear resistance, thereby improving the overall quality and service life of the product. The design of the closed-loop system reduces the waste and loss of powder during the transportation process, improves the utilization rate of powder, and at the same time, precise flow control makes the spraying process more efficient, reduces unnecessary spraying time and material consumption, thereby improving production efficiency.

[0008] Preferably, the back-blowing cyclone dust removal system includes a cyclone separator and a dust hopper. The cyclone separator is connected to the powder spraying room via a pipeline to ensure that the excess powder generated during the spraying process is collected in the dust hopper at the bottom of the cyclone separator. The cyclone separator can efficiently collect the excess powder generated during the spraying process. These powders are guided to the inner wall of the cyclone separator under the action of the airflow and are deposited in the dust hopper at the bottom due to the centrifugal force. This efficient collection method significantly reduces the dust pollution in the spraying environment and improves the cleanliness of the working environment. The timely collection and treatment of excess powder effectively reduces the dust concentration in the air, thereby improving the air quality in the spraying operation area. Through the collection effect of the cyclone separator, the excess powder can be recycled and the utilization rate of the powder is improved, which not only reduces the production cost, but also reduces the pollution to the environment, which is in line with the concept of sustainable development.

[0009] Preferably, the back-blowing cyclone dust removal system also includes a back-blowing device and an exhaust duct. The back-blowing device is used to regularly clean the dust accumulated on the dust hopper and the inner wall of the cyclone separator. The exhaust duct is arranged on the cyclone separator to discharge clean air from the inside of the cyclone separator. The back-blowing device is used to regularly clean the dust accumulated on the dust hopper and the inner wall of the cyclone separator. Through the back-blowing operation, high-pressure gas or airflow is introduced into the inside of the cyclone separator, forming a reverse airflow, which blows off and discharges the dust particles attached to the inner wall and the dust hopper. This cleaning method is not only thorough, but also can reduce the problems of equipment blockage and performance degradation caused by excessive dust accumulation, ensuring the continuous and efficient operation of the dust removal system. At the same time, regular cleaning of dust accumulation can reduce the wear and corrosion of dust on the cyclone separator and the dust hopper, thereby extending the service life of the equipment. The coordinated use of the back-blowing device and the exhaust duct can ensure that the inside of the cyclone separator always maintains a clean air state. During the back-blowing cleaning process, the blown-off dust particles are discharged to the outside of the system through the exhaust duct, avoiding the accumulation of dust inside the equipment and secondary pollution.

[0010] Preferably, the filter element filter includes a shell and a filter element located in the shell. The filter element is used to perform secondary filtration treatment on the airflow that may contain dust after preliminary separation. The filter element in the filter element filter can perform secondary filtration treatment on the airflow that may still contain dust after preliminary separation. This secondary filtration mechanism significantly improves the filtration accuracy and ensures the cleanliness of the exhaust gas. The dust particles in the airflow are effectively removed through the filtering effect of the filter element, avoiding the wear and blockage of subsequent equipment (such as powder spray guns, conveying pipelines, etc.) by these particles. The clean airflow reduces coating defects caused by dust pollution during the spraying process, such as particles, pitting, etc., which helps to improve the quality and appearance of the sprayed products and meet higher market demands.

[0011] Preferably, the curing system includes a furnace body, a heating component arranged on the furnace body, a temperature control system and a ventilation system. The temperature control system is used to heat the workpiece by the heating component so that the powder coating melts and solidifies on the surface of the workpiece. The ventilation system is used to circulate hot air in the furnace body to help the temperature in the furnace body be evenly distributed. The temperature control system ensures that the temperature in the furnace body reaches the conditions required for melting and solidifying the powder coating by accurately controlling the working state of the heating component, so that the powder coating can melt evenly and quickly and firmly adhere to the surface of the workpiece, thereby improving the efficiency and effect of curing. Since the temperature control system can ensure the uniform distribution of temperature in the furnace body, the powder coating can form a uniform and dense coating during the melting and solidification process, and has excellent physical and chemical properties, such as corrosion resistance, wear resistance, etc., thereby improving the overall quality and service life of the workpiece. The introduction of the ventilation system enables the hot air in the furnace body to circulate, reducing heat loss and waste, which not only helps to maintain the uniformity of temperature in the furnace body, but also improves energy utilization efficiency and reduces production costs.

[0012] Preferably, the curing system further comprises a preheating component =, which is arranged between the powder supply system and the curing system for preheating the workpiece before curing. The surface temperature of the workpiece after preheating is increased, which is beneficial to the adhesion of the powder coating and the subsequent curing process. The preheating component = preheats the workpiece before entering the curing system, so that the surface temperature of the workpiece is increased. The preheating process helps the powder coating to better wet and adhere when it contacts the workpiece surface, reducing problems such as poor leveling and weak adhesion of the coating caused by too low a surface temperature of the workpiece. The surface temperature of the workpiece after preheating is relatively high, which is beneficial to the melting and chemical reaction of the powder coating during the curing process. Under high temperature conditions, the resin and other components in the powder coating are more likely to undergo cross-linking and curing reactions, thereby accelerating the curing process and shortening the production cycle. The use of the preheating component = makes the powder coating adhere more firmly and evenly to the workpiece surface. During the curing process, due to the effect of preheating, the coating can form a denser and smoother coating, which is not only beautiful in appearance, but also has better physical and chemical properties, such as corrosion resistance and wear resistance.

[0013] Preferably, the cooling system includes a cooling fan / cooling water circulation device, which is used to cool the workpiece after solidification to prevent deformation or damage of the workpiece due to excessive temperature. The cooling system promptly cools the solidified workpiece through a cooling fan or a cooling water circulation device, effectively reducing the surface temperature of the workpiece. This cooling measure prevents problems such as workpiece deformation, warping or internal stress concentration caused by excessive temperature, thereby protecting the quality and dimensional accuracy of the workpiece. By quickly cooling the workpiece, the cooling system shortens the residence time of the workpiece in the curing system, reduces the production cycle, and reduces production costs.

[0014] Preferably, the powder spray gun includes a gun head and a pipe portion. The gun head has a notch for spraying powder, and the inner wall of the gun head has a spiral groove connected to the notch. The spiral groove is used to guide the powder. The design of the spiral groove allows the powder to be guided and dispersed along a spiral trajectory before being sprayed. This guidance helps the powder form a more uniform and delicate spray during spraying, thereby improving the uniformity and consistency of the spraying. Due to the guidance of the spiral groove, the powder can be more concentrated and effectively covered on the workpiece surface during spraying, reducing powder waste caused by uneven spraying. This not only reduces production costs but also conforms to the environmental protection concept of energy conservation and emission reduction.

[0015] The beneficial effects of the present invention are as follows: through the high-speed rotating airflow and the unique back-flushing design, the excess powder generated during the spraying process is effectively separated from the gas, achieving a recovery efficiency of more than 98%, which not only reduces the waste of powder, but also reduces the production cost. The filter element filter serves as a secondary filtering device, and the filter element filter further filters out the fine dust in the air, ensuring the purity of the recovered powder, while avoiding the pollution of the dust to the environment. The stable and accurate powder supply system ensures the uniformity and consistency of the powder coating during the spraying process, providing a high-quality coating foundation for the workpiece surface. The heating and curing treatment enables the powder coating to be fully cross-linked and cured in a short time to form a strong and corrosion-resistant coating, thereby improving the surface quality and durability of the workpiece, and facilitating the use of air spraying to change powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic plan view of the main structure of the utility model;

[0017] Figure 2 This is a schematic plan view of the powder supply system of the present utility model;

[0018] Figure 3 This is a schematic plan view of a powder spray gun of the present invention;

[0019] Figure 4 This is a schematic plan view of the cooling system of the present invention.

[0020] Reference numerals include:

[0021] 1. Powder supply system; 2. Back-blowing cyclone dust removal system; 3. Filter element filter; 4. Curing system; 5. Preheating component 5; 6. Cooling system; 7. Workpiece unloading area; 8. Workpiece loading area; 9. Powder spray gun. DETAILED DESCRIPTION

[0022] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0023] See also Figures 1 to 4 As shown, the utility model is an automatic powder changing large cyclone powder recovery room, including a powder supply system 1, a back-blowing cyclone dust removal system 2 and a filter element filter 3. The powder supply system 1 is used to provide powder coating for spraying, and the back-blowing cyclone dust removal system 2 and the filter element filter 3 are respectively used to recover and treat excess powder generated during the spraying process; it also includes a curing system 4 and a cooling system 6 for heating and curing the workpiece after spraying. The curing system 4 and the cooling system 6 are respectively used for heating and curing treatment and cooling treatment of the workpiece after spraying.

[0024] Specifically, through the high-speed rotating airflow and unique back-blowing design, the excess powder generated during the spraying process is effectively separated from the gas, achieving a recovery efficiency of more than 98%, which not only reduces the waste of powder, but also reduces production costs. The filter element filter 3 serves as a secondary filtering device. The filter element filter 3 further filters out the fine dust in the air, ensuring the purity of the recovered powder, while avoiding the pollution of dust to the environment. The stable and precise powder supply system 1 ensures the uniformity and consistency of the powder coating during the spraying process, providing a high-quality coating foundation for the workpiece surface. The heating and curing treatment allows the powder coating to be fully cross-linked and cured in a short time to form a strong, corrosion-resistant coating, which improves the surface quality and durability of the workpiece and is conducive to changing powder by air spraying.

[0025] Specifically, the powder supply system 1 includes a powder spraying room, a powder pipeline arranged in the powder spraying room, and a powder spraying gun 9 connected to the powder pipeline. The powder supply system 1 also includes a powder storage tank connected to the powder pipeline, and a powder pump for supplying the powder in the powder storage tank to the powder spraying gun 9. As a storage container for powder coating, the powder storage tank can stably store a large amount of powder coating to ensure continuous powder supply during the production process. The tank body is made of highly sealed and moisture-proof materials to prevent the powder from getting damp and agglomerating, which affects the spraying quality. The powder pump serves as a power source to evenly and continuously transport the powder in the powder storage tank to the powder spraying gun 9. By precisely controlling the delivery speed and pressure of the powder pump, accurate supply of powder coating can be achieved, thereby improving spraying efficiency and quality.

[0026] Specifically, the powder spray gun 9 is used to spray a uniform and dense coating on demand. The powder spray gun 9 is provided with a flow meter used in conjunction with the powder spray gun 9, which is connected to the powder spray gun 9 through a conveying pipe to form a closed-loop system for powder supply. The powder pump draws powder from the storage tank, adjusts the flow rate through the flow meter, and then sends it to the powder spray gun 9 through the conveying pipe for spraying. The flow meter set on the powder spray gun 9 can monitor and adjust the flow rate of powder in real time to ensure that the supply amount of powder during the spraying process is accurate and controllable, avoiding coating quality problems caused by uneven powder supply. Due to the precise control of the powder supply amount, the powder spray gun 99 can spray a uniform and dense coating on demand, which can have better adhesion, corrosion resistance and wear resistance, thereby improving the overall quality and service life of the product. The design of the closed-loop system reduces the waste and loss of powder during the transportation process, and improves the utilization rate of powder. At the same time, precise flow control makes the spraying process more efficient, reduces unnecessary spraying time and material consumption, thereby improving production efficiency.

[0027] Specifically, the back-blowing cyclone dust removal system 2 includes a cyclone separator and a dust hopper. The cyclone separator is connected to the powder spraying room via a pipeline, so that the excess powder generated during the spraying process is collected in the dust hopper at the bottom of the cyclone separator. The cyclone separator can efficiently collect the excess powder generated during the spraying process. These powders are guided to the inner wall of the cyclone separator under the action of the airflow, and are deposited in the dust hopper at the bottom due to the action of centrifugal force. This efficient collection method significantly reduces the dust pollution in the spraying environment and improves the cleanliness of the working environment. The timely collection and treatment of excess powder effectively reduces the dust concentration in the air, thereby improving the air quality in the spraying operation area. Through the collection function of the cyclone separator, the excess powder can be recycled and the utilization rate of the powder is improved, which not only reduces the production cost, but also reduces the pollution to the environment, which is in line with the concept of sustainable development.

[0028] Specifically, the back-blowing cyclone dust removal system 2 also includes a back-blowing device and an exhaust duct. The back-blowing device is used to regularly clean the dust accumulated on the inner wall of the dust hopper and the cyclone separator. The exhaust duct is arranged on the cyclone separator to discharge the clean air inside the cyclone separator. The back-blowing device is used to regularly clean the dust accumulated on the inner wall of the dust hopper and the cyclone separator. Through the back-blowing operation, high-pressure gas or airflow is introduced into the interior of the cyclone separator to form a reverse airflow, which blows off and discharges the dust particles attached to the inner wall and the dust hopper. This cleaning method is not only thorough, but also can reduce the equipment blockage and performance degradation problems caused by excessive dust accumulation, ensuring the continuous and efficient operation of the dust removal system. At the same time, regular cleaning of dust accumulation can reduce the wear and corrosion of dust on the cyclone separator and the dust hopper, thereby extending the service life of the equipment. The coordinated use of the back-blowing device and the exhaust duct can ensure that the inside of the cyclone separator always maintains a clean air state. During the back-blowing cleaning process, the blown-off dust particles are discharged to the outside of the system through the exhaust duct, avoiding the accumulation of dust inside the equipment and secondary pollution.

[0029] Specifically, the filter element filter 3 includes a shell and a filter element located in the shell. The filter element is used to perform secondary filtering treatment on the airflow that may contain dust after preliminary separation. The filter element in the filter element filter 3 can perform secondary filtering treatment on the airflow that may still contain dust after preliminary separation. This secondary filtration mechanism significantly improves the filtration accuracy and ensures the cleanliness of the exhaust gas. Through the filtering effect of the filter element, the dust particles in the airflow are effectively removed, avoiding the wear and blockage of subsequent equipment (such as powder spray guns, conveying pipelines, etc.) by these particles. The clean airflow reduces coating defects caused by dust pollution during the spraying process, such as particles, pitting, etc., which helps to improve the quality and appearance of the sprayed products and meet higher market demands.

[0030] Specifically, the curing system 4 includes a furnace body, a heating component arranged on the furnace body, a temperature control system and a ventilation system. The temperature control system is used to heat the workpiece by the heating component so that the powder coating melts and solidifies on the surface of the workpiece. The ventilation system is used to circulate hot air in the furnace body to help the temperature in the furnace be evenly distributed. The temperature control system ensures that the temperature in the furnace body reaches the conditions required for melting and solidifying the powder coating by accurately controlling the working state of the heating component, so that the powder coating can melt evenly and quickly and firmly adhere to the surface of the workpiece, thereby improving the efficiency and effect of curing. Since the temperature control system can ensure the uniform distribution of temperature in the furnace body, the powder coating can form a uniform and dense coating during the melting and solidification process, and has excellent physical and chemical properties, such as corrosion resistance and wear resistance, thereby improving the overall quality and service life of the workpiece. The introduction of the ventilation system enables the hot air in the furnace body to circulate, reducing heat loss and waste, which not only helps to maintain the uniformity of temperature in the furnace body, but also improves energy utilization efficiency and reduces production costs.

[0031] Specifically, the ventilation system uses a fan to circulate air in the furnace.

[0032] Specifically, the curing system 4 also includes a preheating component 5, which is arranged between the powder supply system 1 and the furnace body of the curing system 4 to preheat the workpiece before curing. The surface temperature of the workpiece after preheating is increased, which is conducive to the adhesion of the powder coating and the subsequent curing process. The preheating component 5 preheats the workpiece before entering the curing system, so that the surface temperature of the workpiece is increased. The preheating process helps the powder coating to better wet and adhere when it contacts the workpiece surface, reducing problems such as poor leveling and weak adhesion of the coating caused by the low surface temperature of the workpiece. The surface temperature of the workpiece after preheating is relatively high, which is conducive to the melting and chemical reaction of the powder coating during the curing process. Under high temperature conditions, the resin and other components in the powder coating are more likely to undergo cross-linking and curing reactions, thereby accelerating the curing process and shortening the production cycle. The use of the preheating component 5 makes the powder coating adhere more firmly and evenly to the workpiece surface. During the curing process, due to the effect of preheating, the coating can form a denser and smoother coating, which is not only beautiful in appearance, but also has better physical and chemical properties, such as corrosion resistance and wear resistance.

[0033] Specifically, the preheating component 5 comes from the curing system 4, and the curing system 4 includes a heating chamber. The heating chamber forms the preheating component 5 through pipelines, and the pipelines are made of different materials to preheat specific areas.

[0034] Specifically, the cooling system 6 includes a cooling fan / cooling water circulation device. The cooling system 6 is used to cool the workpiece after solidification to prevent deformation or damage of the workpiece due to excessive temperature. The cooling system 6 uses a cooling fan or a cooling water circulation device to timely cool the workpiece after solidification, effectively reducing the temperature of the workpiece surface. This cooling measure prevents problems such as workpiece deformation, warping or internal stress concentration caused by excessive temperature, thereby protecting the quality and dimensional accuracy of the workpiece. By quickly cooling the workpiece, the cooling system 6 shortens the residence time of the workpiece in the curing system, reduces the production cycle, and reduces production costs.

[0035] Specifically, the powder spray gun 9 includes a gun head and a pipe portion. The gun head has a notch for spraying powder, and the inner wall of the gun head has a spiral groove connected to the notch. The spiral groove is used to guide the powder. The design of the spiral groove allows the powder to be guided and dispersed along a spiral trajectory before being sprayed. This guiding effect helps the powder form a more uniform and delicate spray during spraying, thereby improving the uniformity and consistency of the spraying. Due to the guiding effect of the spiral groove, the powder can be more concentrated and effectively covered on the workpiece surface during spraying, reducing powder waste caused by uneven spraying. This not only reduces production costs but also conforms to the environmental protection concept of energy conservation and emission reduction.

[0036] Specifically, the powder gun 9 is made of materials with self-lubricating and anti-clogging properties, such as polymer materials: polytetrafluoroethylene (PTFE): has an extremely low friction coefficient and excellent corrosion resistance, and is often used to manufacture self-lubricating bearings, seals, etc.; polyetheretherketone (PEEK): has high strength and strong wear resistance, and is also commonly used to manufacture wear-resistant composite materials; polyphenylene sulfide (PPS): has excellent heat resistance, chemical and mechanical properties, and its self-lubricating properties can be further improved by adding specific fillers (such as graphite, PTFE, etc.); silver-impregnated graphite: with carbon graphite as the matrix, the molten metal is made by high temperature and high pressure. Silver is immersed in the open pores of carbon graphite materials to form a strong network structure with high temperature resistance, corrosion resistance and good self-lubrication; Metal-based composite materials: such as copper-based, aluminum-based composite materials, made by adding solid lubricants (such as graphite, molybdenum disulfide, etc.), have excellent self-lubricating properties and mechanical strength; Surface-coated metal: A layer of material with self-lubricating properties (such as PTFE, MoS2, etc.) is coated on the metal surface to improve its self-lubricating properties; Ion implantation: Solid lubricants are injected into the metal surface layer through ion implantation technology to form a modified layer with self-lubricating properties.

[0037] Specifically, the pipeline portion is provided with a vibrating member, which is used to vibrate the powder and / or the powder spray gun 9. The action of the vibrating member causes the powder in the pipeline to vibrate, which helps the relative movement between the powder particles, reduces the friction and agglomeration between the particles, and thus improves the fluidity and dispersibility of the powder. During the spraying process, the powder sometimes accumulates or forms a blockage in the pipeline. The vibration generated by the vibrating member can effectively prevent this from happening, keep the pipeline unobstructed, and ensure the continuity and stability of the spraying process. At the same time, through the action of the vibrating member, the powder spray gun 9 can generate tiny vibrations during the spraying process, which helps the powder to adhere to the workpiece surface more evenly, reducing the problems of uneven spraying and coating thickness differences.

[0038] Specifically, the vibrating element is an electromagnetic vibrator: it uses electromagnetic force to generate vibration, and has the advantages of simple structure and easy control; a pneumatic vibrator: it uses the pressure difference generated by compressed air or gas to drive the vibrator to generate vibration; a mechanical vibrator: it generates vibration through the rotation or reciprocating motion of a mechanical structure (such as an eccentric wheel, cam, etc.); an ultrasonic vibrator: it uses the high-frequency vibration of ultrasonic waves to generate vibration effects, etc.

[0039] Specifically, the cooling system 6 is also connected to the workpiece lower area 7, and the powder supply system 1 is also connected to the workpiece upper area 8. The powder supply system 1, the back-blowing cyclone dust removal system 2, the filter element filter 3, the curing system 4, the cooling system 6, the workpiece lower area 7, and the workpiece upper area form a closed loop, making the equipment more compact.

[0040] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. An automatic powder-changing large cyclone powder recovery room, comprising a powder supply system (1), a back-blowing cyclone dust removal system (2) and a filter cartridge (3), wherein the powder supply system (1) is used to provide powder coating for spraying, and the back-blowing cyclone dust removal system (2) and the filter cartridge (3) are used to respectively recover and process excess powder generated during the spraying process; and the characteristics are: The invention also includes a curing system (4) and a cooling system (6) for heating and curing the workpiece after spraying. The curing system (4) and the cooling system (6) are respectively used for heating and curing the workpiece after spraying.

2. The automatic powder changing large cyclone powder recovery room according to claim 1, characterized in that: The powder supply system (1) includes a powder spraying room, a powder pipeline arranged in the powder spraying room, and a powder spraying gun (9) connected to the powder pipeline. The powder supply system (1) also includes a powder storage tank connected to the powder pipeline and a powder pump for supplying powder in the powder storage tank to the powder spraying gun (9).

3. The automatic powder changing large cyclone powder recovery room according to claim 1, characterized in that: The back-blowing cyclone dust removal system (2) comprises a cyclone separator and a dust collecting hopper. The cyclone separator is connected to the powder spraying room via a pipeline so that excess powder generated during the spraying process is collected into the dust collecting hopper at the bottom of the cyclone separator.

4. The automatic powder changing large cyclone powder recovery room according to claim 3, characterized in that: The back-blowing cyclone dust removal system (2) further comprises a back-blowing device and an exhaust duct. The back-blowing device is used to regularly clean dust accumulated on the dust collecting hopper and the inner wall of the cyclone separator. The exhaust duct is arranged on the cyclone separator to discharge clean air from the inside of the cyclone separator.

5. The automatic powder changing large cyclone powder recovery room according to claim 1, characterized in that: The filter element filter (3) comprises a housing and a filter element located in the housing, and the filter element is used for performing secondary filtering on the airflow that may contain dust after preliminary separation.

6. The automatic powder changing large cyclone powder recovery room according to claim 1, characterized in that: The curing system (4) includes a furnace body, a heating component arranged on the furnace body, a temperature control system and a ventilation system. The temperature control system is used for the heating component to heat the workpiece so that the powder coating melts and solidifies on the surface of the workpiece. The ventilation system is used for circulating hot air in the furnace body to help the temperature in the furnace body to be evenly distributed.

7. The automatic powder changing large cyclone powder recovery room according to claim 6, characterized in that: The curing system (4) further comprises a preheating assembly (5), which is arranged between the powder supply system (1) and the furnace body of the curing system (4) for preheating the workpiece before curing.

8. The automatic powder changing large cyclone powder recovery room according to claim 1, characterized in that: The cooling system (6) includes a cooling fan / cooling water circulation device, and the cooling system (6) is used to cool the workpiece after solidification to prevent the workpiece from being deformed or damaged due to excessive temperature.

9. A powder spray gun with automatic powder changing and large cyclone, characterized by: The powder spraying gun (9) comprises a gun head and a pipe part. The gun head is provided with a slot for spraying powder. The inner wall of the gun head is provided with a spiral slot body connected with the slot. The spiral slot body is used for guiding the powder.

10. The automatic powder changing large cyclone powder spray gun according to claim 9, characterized in that: The pipeline portion is provided with a vibration member, which is used to generate vibration for the powder and / or the powder spraying gun (9).

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