Automatic purification system applied to solid powder spraying

Abstract

The invention discloses an automatic purification system applied to solid powder spraying, and belongs to the technical field of solid powder spraying. According to the system, air in a spraying room is guided to sequentially pass through a first filtering device, a second filtering device, a third filtering device, an air return opening, an air inlet of a purification channel, an air outlet of the purification channel and an air outlet through an induced draft fan and a waste gas recovery cycle, and powder around the position where a through hole and / or a slit is located is purified through the purification channel composed of a framework and an interlayer; the first anti-blocking equipment, the second anti-blocking equipment and the third anti-blocking equipment are used for cleaning the first filtering equipment, the second filtering equipment and the third filtering equipment through air in the purification channel correspondingly, so that real-time air purification is achieved, the whole spraying room and all the filtering equipment are purified, full-automatic spraying room purification can be achieved, and the spraying efficiency is improved. Shutdown, production halt and maintenance are not needed, a special spraying room does not need to be additionally built, factory production efficiency is remarkably improved, and cost is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of solid powder spraying, and particularly relates to an automated purification system applied to solid powder spraying. Background Art

[0002] Solid powder spraying is a key process for metal surface treatment. The powder is evenly coated on the workpiece through static electricity or compressed air and forms a protective layer after high-temperature curing. However, dust is generated during the spraying process, polluting the environment, endangering health and posing an explosion risk. The existing purification system uses an induced draft fan in cooperation with a multi-stage filtering device to filter dust through negative pressure exhaust, but there are two major defects: one is that dust is likely to block the filtering medium, resulting in frequent shutdowns for maintenance; the other is that when changing different powders (such as powders of different colors), the system needs to be thoroughly cleaned, which is time-consuming and laborious or requires the construction of a dedicated spraying room, significantly increasing costs. Summary of the Invention

[0003] The purpose of this application is to provide an automated purification system applied to solid powder spraying to solve the above technical problems.

[0004] To achieve the above application purpose, the technical solution adopted in this application is as follows:

[0005] The embodiment of this application provides an automated purification system applied to solid powder spraying, including:

[0006] The skeleton and interlayer in the spraying room, the inside of the skeleton is hollow and connected into one body to form a purification channel, and through holes and / or slits for air outlet are provided on the purification channel;

[0007] A filtering device, which includes a first filtering device, a second filtering device, a third filtering device and an induced draft fan arranged in sequence, and the induced draft fan is provided with a return air port and an air outlet;

[0008] A first anti-blocking device, which is connected to the purification channel and the first filtering device and is used to clean the first filtering device;

[0009] A second anti-blocking device, which is arranged inside the second filtering device and connected to the purification channel and is used to clean the inside of the second filtering device;

[0010] A third anti-blocking device, which is arranged outside the second filtering device and connected to the purification channel and is used to clean the outside of the second filtering device;

[0011] Among them, when the induced draft fan is working, the air in the spraying room sequentially passes through the first filtering device, the second filtering device, the third filtering device, the return air port, the air inlet of the purification channel, the air outlet of the purification channel, and the air outlet; the through holes and / or slits are used for air outlet to purify the powder around the position where they are located.

[0012] In some embodiments, air guiding plates are provided at the positions of the through holes and / or slits to change the air outlet direction for purifying the powder around the position where they are located.

[0013] In some embodiments, the first filtering device includes a first filter screen and a second filter screen. An air duct is formed between the first filter screen and the second filter screen. The top of the air duct is used to communicate with the first anti-clogging device, and a recovery device for recovering solid powder is provided at the bottom of the air duct.

[0014] In some embodiments, the first anti-clogging device includes: a first pipeline and a first switch valve. The first pipeline is used to communicate the purification channel and the top of the air duct, and the first switch valve is installed on the first pipeline.

[0015] In some embodiments, the second filtering device includes a barrel-shaped filter screen with a sealed bottom. After the air passing through the first filtering device enters the interior of the barrel-shaped filter screen, it flows through the top opening of the barrel-shaped filter screen to the third filtering device.

[0016] In some embodiments, a bearing is connected to the top of the barrel-shaped filter screen;

[0017] The second anti-clogging device includes: a second pipeline, a second switch valve, and a first air guiding rod. The first air guiding rod is arranged inside the barrel-shaped filter screen. One end of the second pipeline communicates with the purification channel, and the other end is inserted into the first air guiding rod, so that the side of the first air guiding rod discharges air to blow the inner side of the barrel-shaped filter screen and rotate it through the bearing. The second switch valve is installed on the second pipeline.

[0018] In some embodiments, the third anti-clogging device includes: a third pipeline, a third switch valve, and a second air guiding rod. The second air guiding rod is arranged outside the barrel-shaped filter screen. One end of the third pipeline communicates with the purification channel, and the other end is inserted into the second air guiding rod, so that the side of the second air guiding rod discharges air to blow the outside of the barrel-shaped filter screen and rotate it through the bearing. The third switch valve is installed on the third pipeline.

[0019] In some embodiments, the filtering device further includes a fourth filtering device that surrounds the induced draft fan, so that the air passes through the fourth filtering device before flowing out through the air outlet.

[0020] In some embodiments, the filtering device further includes a fifth filtering device that is arranged at the air outlet position, so that the air passes through the fifth filtering device before flowing out through the air outlet.

[0021] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0022] The automated purification system for solid powder spraying provided by the embodiments of the present application, through an induced draft fan, guides the air in the spraying room for waste gas recovery and circulation to sequentially pass through a first filtering device, a second filtering device, a third filtering device, an air return port, an air inlet of a purification channel, an air outlet of the purification channel, and an air outlet. The powder around the positions where the purification through holes and / or slits formed by the framework of the purification channel are located is purified. The first anti-blocking device, the second anti-blocking device, and the third anti-blocking device use the air in the purification channel to clean the first filtering device, the second filtering device, and the third filtering device respectively, so as to realize real-time air purification, purification of the entire spraying room and each filtering device, can realize full-automatic purification of the spraying room, without shutdown for maintenance, without building a dedicated spraying room, and significantly improve the production efficiency of the factory and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 FIG. 1 shows a schematic structural diagram of an automated purification system for solid powder spraying provided by an embodiment of the present application;

[0025] Figure 2 FIG. 2 shows a partial structural diagram of an automated purification system for solid powder spraying provided by an embodiment of the present application;

[0026] Figure 3 FIG. 3 shows a partial structural diagram of an automated purification system for solid powder spraying provided by an embodiment of the present application;

[0027] Figure 4 FIG. 4 shows a top view schematic diagram of a purification channel provided by an embodiment of the present application;

[0028] Figure 5 FIG. 5 shows a waste gas utilization flow chart of an automated purification system for solid powder spraying provided by an embodiment of the present application.

[0029] ILLUSTRATION DESCRIPTION:

[0030] 10. Spray gun; 11. Workpiece; 12. Purification channel; 121. Slit; 122. Air return opening; 131. First filter screen; 132. Second filter screen; 141. Barrel-shaped filter screen; 15. Third filtering device; 161. First pipeline; 162. First switching valve; 171. Second pipeline; 172. Second switching valve; 173. First air guiding rod; 181. Third pipeline; 182. Third switching valve; 183. Second air guiding rod; 19. Induced draft fan; 20. Fifth filtering device; 21. Baffle; 22. Electric control room; 23. Bottom cross beam; 24. Adsorption door; 25. Rotatable scraping door. Detailed implementation manners

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0034] In order to illustrate the technical solutions described in the present application, the following will be described through specific embodiments.

[0035] Please refer to Figures 1 to 4 As shown, the embodiment of the present application provides an automated purification system applied to solid powder spraying, including:

[0036] The framework in the spraying room, the interior of the framework is hollow and integrated to form a purification channel 12, and through holes and / or slits 121 for air outlet are provided on the purification channel 12;

[0037] A filtering device, the filtering device includes a first filtering device, a second filtering device, a third filtering device 15 and an induced draft fan 19 arranged in sequence, and the induced draft fan 19 is provided with an air return opening 122 and an air outlet;

[0038] A first anti-blocking device, which is connected to the purification channel 12 and the first filtering device and is used to clean the first filtering device;

[0039] A second anti-clogging device is disposed inside the second filtering device and communicates with the purification channel 12 for cleaning the inside of the second filtering device;

[0040] A third anti-clogging device is disposed outside the second filtering device and communicates with the purification channel 12 for cleaning the outside of the second filtering device;

[0041] Wherein, when the induced draft fan 19 is operating, the air in the spraying booth sequentially passes through the first filtering device, the second filtering device, the third filtering device 15, the air return port 122, the air inlet of the purification channel 12, the air outlet of the purification channel 12, and the air outlet; the through holes and / or slits 121 are used for discharging air to purify the powder around the position where they are located.

[0042] In the embodiments of the present application, the skeleton includes, but is not limited to: the support skeleton of the production equipment in the spraying booth, the support skeleton of the automated production line (for example, the production line for transporting the workpiece 11), the door panels, cross beams, etc. of the spraying booth.

[0043] The present application does not specifically limit the shape and structure of the skeleton, and those skilled in the art can design it according to the needs of the spraying booth.

[0044] The present application does not specifically limit the shape and structure of the purification channel 12.

[0045] The through holes and / or slits 121 on the purification channel 12 can be pre-opened according to design requirements, or can be opened later according to actual production needs, and the present application does not specifically limit this.

[0046] As an example, the filtering device is disposed on the opposite side of the spray gun 10.

[0047] It should be noted that the air inlet of the purification channel 12 is connected to the air return port 122, and the air outlet of the purification channel 12 can be understood as the end of the air flow in the purification channel 12.

[0048] In some embodiments, a wind deflector is disposed at the position of the through holes and / or slits 121 for changing the air outlet direction to purify the powder around the position where they are located. The wind deflector can be pre-fabricated according to design requirements, or can be fabricated later according to actual production needs, and the present application does not specifically limit this.

[0049] In some embodiments, the first filtering device includes a first filter screen 131 and a second filter screen 132. An air passage is formed between the first filter screen 131 and the second filter screen 132. The top of the air passage is used to communicate with the first anti-clogging device, and a recovery device for recovering solid powder is provided at the bottom of the air passage.

[0050] In some embodiments, the first anti-clogging device includes: a first pipe 161 and a first switching valve 162. The first pipe 161 is used to connect the purification channel 12 and the top of the air duct, and the first switching valve 162 is installed on the first pipe 161.

[0051] For example, the first switching valve 162 is an electronic valve and can be remotely controlled to achieve automatic purification.

[0052] For example, the first switching valve 162 is opened and closed regularly, or is opened and closed at intervals of a certain period of time.

[0053] For example, when the first switching valve 162 is opened, the air in the purification channel 12 enters the air duct and then flows to the first filter screen 131 and the second filter screen 132, so as to automatically clean the first filter screen 131 and the second filter screen 132 and prevent them from being clogged.

[0054] In some embodiments, the second filtering device includes a barrel-shaped filter screen 141. The bottom of the barrel-shaped filter screen 141 is sealed. After the air passing through the first filtering device enters the inside of the barrel-shaped filter screen 141, it flows to the third filtering device 15 through the top opening of the barrel-shaped filter screen 141.

[0055] In some embodiments, a bearing is connected to the top of the barrel-shaped filter screen 141.

[0056] The second anti-clogging device includes: a second pipe 171, a second switching valve 172, and a first air guiding rod 173. The first air guiding rod 173 is arranged inside the barrel-shaped filter screen 141. One end of the second pipe 171 is connected to the purification channel 12, and the other end is inserted into the first air guiding rod 173, so that the air exits from the side of the first air guiding rod 173 to blow the inner side of the barrel-shaped filter screen 141 and rotate it through the bearing. The second switching valve 172 is installed on the second pipe 171.

[0057] For example, the second switching valve 172 is an electronic valve and can be remotely controlled to achieve automatic purification.

[0058] For example, the second switching valve 172 is opened and closed regularly, or is opened and closed at intervals of a certain period of time.

[0059] For example, when the second switching valve 172 is opened, the air in the purification channel 12 enters the first air guiding rod 173 and then flows to the inner side wall of the barrel-shaped filter screen 141, so as to automatically clean the inner side wall and prevent it from being clogged.

[0060] For example, the air outlet of the first air guiding rod 173 has a certain angle relative to the inner side wall of the barrel-shaped filter screen 141, so as to drive the barrel-shaped filter screen 141 to rotate through the bearing, so as to clean more thoroughly.

[0061] In some embodiments, the third anti-clogging device includes: a third pipe 181, a third switching valve 182, and a second air guide rod 183. The second air guide rod 183 is disposed outside the barrel-shaped filter net 141. One end of the third pipe 181 communicates with the purification channel 12, and the other end is inserted into the second air guide rod 183, such that air exits from the side surface of the second air guide rod 183 to blow the outside of the barrel-shaped filter net 141 and rotate it through a bearing. The third switching valve 182 is installed on the third pipe 181.

[0062] For example, the third switching valve 182 is an electronic valve and can be remotely controlled to achieve automated purification.

[0063] For example, the third switching valve 182 is opened and closed at regular intervals, or opened and closed at intervals of a certain period of time.

[0064] For example, when the third switching valve 182 is opened, the air in the purification channel 12 enters the second air guide rod 183 and then flows to the outer side wall of the barrel-shaped filter net 141, achieving automatic cleaning of the outer side wall to prevent them from being clogged.

[0065] For example, the air outlet of the second air guide rod 183 has a certain angle relative to the outer side wall of the barrel-shaped filter net 141, so as to drive the barrel-shaped filter net 141 to rotate through a bearing for more thorough cleaning.

[0066] In some embodiments, the filtering device further includes a fourth filtering device that surrounds the induced draft fan 19, such that the air passes through the fourth filtering device before flowing out through the air outlet. In some embodiments, the filtering device further includes a fifth filtering device 20 disposed at the air outlet position. For example, the air passes through the fifth filtering device 20 before being discharged through the air outlet.

[0067] As an example, the third filtering device 15, the fourth filtering device, and the fifth filtering device 20 are all filter cotton.

[0068] It should be noted that the fourth filtering device and the fifth filtering device 20 can be provided or not provided according to needs. When the air circulation is not smooth, the fourth filtering device and / or the fifth filtering device 20 can be removed.

[0069] As an example, in the electric control room 22, a baffle 21 is installed on the second pipe 171. When the air flows from the barrel-shaped filter net 141 to the electric control room 22 and then to the third filtering device 15, the baffle 21 is used to change the flow direction of part of the air entering the electric control room 22, so as to utilize the air flow to impact and clean the dust in the electric control room 22. Optionally, the overall space of the electric control room 22 is in a normally closed state.

[0070] As an example, a bottom crossbeam 23 is provided below the first filtering device, an adsorption door 24 is installed on the bottom crossbeam, and a rotatable scraping door 25 is installed on the adsorption door 24. Specifically, as Figure 3 shown, during normal operation, the rotatable scraping door 25 is located at the right position and does not contact the arc for sealing, so that the adsorption door 24 is tightly attached and sealed under negative pressure. When the rotatable scraping door 25 is manually or electrically controlled to rotate to the left (dashed line) position, it contacts the arc for sealing and makes the adsorption door 24 move away to maintain an open state (as Figure 3 shown), so that the bottom dust flows out for recovery. It should be noted that the adsorption door 24 and the rotatable scraping door 25 cooperate to prevent dust backflow and achieve recovery, and their structures are not specifically limited, and technicians can set them according to actual situations.

[0071] As an example, the purification channel 12 further includes a sandwich layer, that is, the sandwich layer and the hollow skeleton together form the purification channel 12, which can make the air flow smoother.

[0072] It should be noted that the definition of the sandwich layer generally refers to the intermediate layer space between the main structural layers (such as the ground layer and the roof layer) in the factory building structure. Through specific structures, a relatively independent enclosed or semi-enclosed area is formed, which is mainly used to achieve functions such as ventilation circulation, air conditioning, equipment layout and space utilization.

[0073] In the embodiments of the present application, the sandwich layer is mainly used to connect the purification channel 12 to achieve smooth air circulation. The position of the sandwich layer can be set at the middle section, the end, etc. of the purification channel 12, and technicians can adjust and set it according to actual situations.

[0074] In summary, the automated purification system for solid powder spraying provided by the embodiments of the present application guides the air in the spraying room through the induced draft fan 19 to sequentially pass through the first filtering device, the second filtering device, the third filtering device 15, the air return port 122, the air inlet of the purification channel 12, the air outlet of the purification channel 12, and the air outlet. The powder around the purification through holes and / or slits 121 of the purification channel 12 formed by the skeleton is purified, and the first anti-blocking device, the second anti-blocking device and the third anti-blocking device use the air in the purification channel 12 to clean the first filtering device, the second filtering device and the third filtering device 15 respectively, so as to realize real-time air purification, purification of the entire spraying room and each filtering device, and can realize full-automatic purification of the spraying room without stopping production for maintenance, without building a dedicated spraying room, and significantly improve the factory production efficiency and reduce costs.

[0075] Further, please refer to Figure 5As shown, for a better understanding of the technical solution of the present application, in another embodiment of the present application, a waste gas utilization flowchart of the above-mentioned automated purification system applied to solid powder spraying is further provided, including the following steps:

[0076] S1. After starting spraying, start cleaning the spray booth and collect the powder in the spray booth simultaneously.

[0077] This step is carried out continuously.

[0078] S2. Clean the mesh surfaces of the first and second filter meshes and collect and recycle the powder. For example, clean the mesh surfaces of the first filter 131 and the second filter 132.

[0079] This step is carried out repeatedly.

[0080] S3. Clean the internal mesh surface of the third filter cartridge and push the filter cartridge to rotate rapidly to filter the powder. For example, clean the internal mesh surface of the barrel-shaped filter mesh 141.

[0081] This step is carried out repeatedly.

[0082] S4. Automatically clean the dust in the electric control room when passing through it. For example, clean the dust in the electric control room 22 through the baffle 21.

[0083] This step is carried out repeatedly.

[0084] S5. Push the filter cartridge to rotate rapidly to blow and clean the external surface and mesh holes of the filter cartridge for the fourth filtration. For example, clean the external mesh surface of the barrel-shaped filter mesh 141.

[0085] This step is carried out repeatedly.

[0086] S6. Blow and clean the top, bottom, left and right wall surfaces of the recovery chamber and collect the powder.

[0087] This step is carried out repeatedly.

[0088] S7. Collect the trace waste powder after the fifth filtration into the filter cotton and replace the filter cotton when there is no need to recycle the powder. For example, carry out the fifth filtration through the fourth filtration device.

[0089] This step is carried out repeatedly.

[0090] S8. There is no powder to be recycled in the sixth filtration. Replace the filter cotton when necessary and blow and cool the induced draft fan motor to increase the service life of the motor. For example, carry out the sixth filtration through the fifth filtration device 20, which is also the last filtration.

[0091] This step is carried out repeatedly.

[0092] The purpose of the last filtration is to reduce the motor noise. Replace the filter cotton when necessary and finally return the clean gas to nature.

[0093] This step is repeated.

[0094] All of the above processes are fully automated during production.

[0095] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. An automated purification system applied to solid powder spraying, characterized in that Including: The framework and interlayer in the spraying booth, the interior of the framework is hollow and integrated to form a purification channel, and through holes and / or slits for air outlet are formed on the purification channel; A filtering device, the filtering device includes a first filtering device, a second filtering device, a third filtering device and a draft fan arranged in sequence, and the draft fan is provided with an air return port and an air outlet; A first anti-blocking device, communicating the purification channel and the first filtering device, for cleaning the first filtering device; A second anti-blocking device, arranged inside the second filtering device and communicating with the purification channel, for cleaning the inside of the second filtering device; A third anti-blocking device, arranged outside the second filtering device and communicating with the purification channel, for cleaning the outside of the second filtering device; Wherein, when the draft fan is working, the air in the spraying booth sequentially passes through the first filtering device, the second filtering device, the third filtering device, the air return port, the air inlet of the purification channel, the air outlet of the purification channel, and the air outlet; the through holes and / or the slits are used for air outlet to purify the powder around the position; 2. The automated purification system applied to solid powder spraying according to claim 1, wherein A wind guide plate is arranged at the position of the through holes and / or the slits, for changing the air outlet direction to purify the powder around the position.

3. The automated purification system applied to solid powder spraying according to claim 1, characterized in that, The first filtering device includes a first filter screen and a second filter screen, an air channel is formed between the first filter screen and the second filter screen, the top of the air channel is used for communicating with the first anti-blocking device, and a recovery device for recovering solid powder is arranged at the bottom of the air channel.

4. The automated purification system applied to solid powder spraying according to claim 3, characterized in that The first anti-blocking device includes: a first pipeline and a first switching valve, the first pipeline is used for communicating the purification channel and the top of the air channel, and the first switching valve is installed on the first pipeline.

5. The automated purification system applied to solid powder spraying according to claim 1, characterized in that, The second filtering device includes a barrel-shaped filter screen, the bottom of the barrel-shaped filter screen is sealed, and after the air passing through the first filtering device enters the inside of the barrel-shaped filter screen, it flows to the third filtering device through the top opening of the barrel-shaped filter screen.

6. The automated purification system applied to solid powder spraying according to claim 5, wherein A bearing is connected to the top of the barrel-shaped filter screen; The second anti-blocking device includes: a second pipeline, a second switching valve, and a first air guiding rod, the first air guiding rod is arranged inside the barrel-shaped filter screen, one end of the second pipeline communicates with the purification channel, and the other end is inserted into the first air guiding rod, so that the side of the first air guiding rod discharges air to blow the inner side of the barrel-shaped filter screen and rotate through the bearing, and the second switching valve is installed on the second pipeline.

7. The automated purification system applied to solid powder spraying according to claim 6, characterized in that, The third anti-blocking device includes: a third pipeline, a third switching valve, and a second air guiding rod, the second air guiding rod is arranged outside the barrel-shaped filter screen, one end of the third pipeline communicates with the purification channel, and the other end is inserted into the second air guiding rod, so that the side of the second air guiding rod discharges air to blow the outside of the barrel-shaped filter screen and rotate through the bearing, and the third switching valve is installed on the third pipeline.

8. The automated purification system applied to solid powder spraying according to claim 1, characterized in that The filtering device further includes a fourth filtering device, the fourth filtering device is arranged around the draft fan, so that the air passes through the fourth filtering device before flowing out through the air outlet.

9. The automated purification system applied to solid powder spraying according to claim 1, wherein The filtering device further includes a fifth filtering device, which is arranged at the position of the air outlet, so that the air passes through the fifth filtering device before flowing out through the air outlet.

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