Air return prevention exhaust system for paint spraying workshop
By designing the anti-return air exhaust system of the paint workshop, including circulating filter components and sealed boxes, the return air problem caused by blockage of activated carbon in the paint workshop is solved, and the filtering net is automatically replaced, which improves the filtration effect and service life.
Patent Information
- Application Number
- CN202411624598.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-02-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
After the operation period of the paint workshop is extended, activated carbon blockage leads to return air problems, and the prior art cannot effectively prevent return air and automatically replace the filter.
A spray painting workshop anti-return air exhaust system is designed, including exhaust main pipe, workshop air outlet pipe and circulation filter components. The circulating filter assembly automatically replaces the filter screen through the motor-driven feeding wheel and collecting wheel, and is sealed through a sealing box and a sealing ring to prevent external air from entering.
It realizes automatic replacement of the filter screen without shutting down, prevents return air, increases the filter area, improves the filtering effect, and extends the service life.
Smart Images
Figure CN119468385A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of workshop anti-return air exhaust technology, and in particular to a paint spraying workshop anti-return air exhaust system. Background Art
[0002] There was no return air problem in the early stage of the paint shop. As the operation cycle lengthened, after 6 months, the activated carbon blockage intensified over time. The on-site workers solved the problem by providing the workshop exhaust fan and adsorption fan frequency. The increase in the workshop fan frequency will lead to an increase in the discharge of paint mist, resulting in thickness blockage and increased processing load. Moreover, the higher the system exhaust concentration, the more serious the activated carbon bed blockage problem. The system exhaust cannot be discharged after being adsorbed by the activated carbon, resulting in the two air flows in the production section can only be returned to the other return air section. At that time, while the return air problem occurs, the concentration of the discharged odor increases, affecting the normal production of the entire workshop. At the same time, the adsorption fan is enlarged, the activated carbon bed is blocked, and the variability problem caused by the increase in suction force of the intake air duct is prominent, affecting the service life and operation stability of the inlet pipeline. At the same time, the frequency of the adsorption fan increases and even overclocking problems occur, and the fan outlet soft joint is broken, affecting the service life of the soft joint.
[0003] It is now necessary to design an exhaust system that can effectively prevent backflow and automatically replace the filter screen. Summary of the invention
[0004] In view of the deficiencies in the prior art, the present invention provides a paint shop anti-return air exhaust system to solve the above-mentioned problems.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a paint shop backflow prevention exhaust system, comprising an exhaust main pipe and three workshop air outlet pipes respectively connected to the exhaust main pipe, a circulating filter assembly is provided in the middle section of the workshop air outlet pipe, and a backflow prevention assembly is provided in the inner cavity where the exhaust main pipe and the workshop air outlet pipe are connected;
[0006] The circulating filter assembly includes a sealing box sleeved on the surface of the workshop air outlet duct, the workshop air outlet duct is located in a section of the inner cavity of the sealing box and is cut off, the inner cavity of the sealing box is respectively driven by a motor to have a feeding wheel and a receiving wheel, the surfaces of the feeding wheel and the receiving wheel are transmission-connected with a filter located in the middle of the cut-off part of the workshop air outlet duct, the surface of the workshop air outlet duct located on the right side of the filter is slidably connected with a sliding plate, the left side of the sliding plate is fixedly connected with an elastic sealing pressure plate abutting the right side of the filter, the surface of the workshop air outlet duct located on the left side of the filter is fixedly connected with the left side of the filter A return spring is fixedly connected to one side of the sliding plate, the right end of the return spring is fixedly connected to the left side of the inner cavity of the sealing box, the left side of the sealing box is fixedly connected to a driving cylinder, the right end of the driving cylinder piston rod is abutted against the left side of the sliding plate, and a trigger switch electrically connected to the feeding wheel and the receiving wheel is fixedly connected to the right side of the sealing box. When in use, the filter screen is located at the cutoff point of the workshop air outlet duct. At this time, the return spring pushes the sliding plate to move to the left, driving the elastic sealing pressure plate to squeeze the surface of the filter screen, and cooperates with the anti-pressure plate on the left to seal the filter screen. The filter screen is connected to the air outlet duct of the workshop, which is separated from the outside world and has a margin that can be extended to the right to form a bag-like structure for filtering. When the filter screen needs to be replaced after a period of use, there is no need to stop the machine. You only need to reduce the wind force of the fan on the air outlet duct of the workshop, and then start the driving cylinder to push the sliding plate to squeeze the reset spring to move to the right, reducing the squeezing force on the filter screen. At this time, the sliding plate moves to the right and abuts against the trigger switch, and the feeding wheel and the receiving wheel are triggered to rotate, driving the filter screen to move downward, and the adsorbed filter screen moves to the receiving wheel below. The filter is wound around the material wheel, and the speed of the feeding wheel is greater than the rotation speed of the receiving wheel. The filter is continuously blown by wind at the cut-off point of the workshop air outlet duct, and a cloth bag structure protruding to the right is formed inside the funnel-shaped wire mesh bag. After the replacement is completed, the driving cylinder is reset, and the reset spring pushes the sliding plate to reset and squeeze the filter to position it, and then the filtering operation is continued. The filter can be replaced fully automatically without stopping the machine for operation. The replacement effect is good, and it can ensure that the filter is always in a cloth bag shape, thereby increasing the filtering effect.
[0007] As a further solution of the present invention: the sealing box and the workshop air outlet pipe are sealed by a sealing ring to effectively seal and prevent outside air from entering.
[0008] As a further solution of the present invention: a cross-shaped supporting steel wire is fixedly connected to the left end of the middle cutoff of the workshop air outlet duct, which is tightly attached to both sides of the filter screen to limit its position and prevent it from being drastically deformed under wind.
[0009] As a further solution of the present invention: a funnel-shaped steel mesh bag recessed to the right is fixedly connected to the right end of the middle cutoff point of the workshop air outlet duct. Through the setting of the funnel-shaped steel mesh bag, the filter net itself is made of flexible material. Under the blowing of wind, a cloth bag structure protruding to the right is formed inside the funnel-shaped steel mesh bag, which can increase the filtering area, minimize the influence of wind force while ensuring the filtering effect, and achieve better filtering effect.
[0010] As a further solution of the present invention: the bottom of the inner cavity of the sealed box is provided with a slope inclined toward the left side, and the bottom of the sealed box is connected to a slag discharge pipe through a slag discharge port. Through the setting of the slag discharge pipe, the residue inside the sealed box can be discharged, and the interior can be effectively cleaned.
[0011] As a further solution of the present invention: the anti-return air component includes an inner convex section opened below the exhaust main pipe, the inner convex section is arranged on the left side of the workshop air outlet duct, and the inner cavity of the inner convex section is rotatably connected to an arc-shaped guide plate. Through the arrangement of the arc-shaped guide plate, when the wind force of the workshop air outlet duct to the outside is too large, the arc-shaped guide plate is driven by a motor to rotate to the top of the workshop air outlet duct, and the exhaust main pipe is diverted from the middle, and the exhaust air of the left workshop air outlet duct is transported from above the exhaust air of the right workshop air outlet duct, and gathered together to discharge to the right side, effectively guiding the airflow to prevent the wind force from being too strong, and the wind in the workshop air outlet duct from flowing back under high pressure into the inside of the workshop air outlet duct.
[0012] As a further solution of the present invention: a guide block which is gradually inclined upward from left to right is fixedly connected to the left side of the inner convex section, and the airflow is guided together by the guide block to move upward.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. In the present invention, the filter screen is continuously blown by wind at the cut-off point of the workshop air outlet duct, and a cloth bag structure protruding to the right is formed inside the funnel-shaped wire mesh bag. After replacement, the cylinder is driven to reset, and the reset spring pushes the sliding plate to reset and squeeze the filter screen to position it, and then the filtering operation is continued. The filter screen can be replaced fully automatically without stopping the machine for operation, and the replacement effect is good. It can also ensure that the filter screen is always in the shape of a cloth bag, thereby increasing the filtering effect.
[0015] 2. The present invention forms a cloth bag structure protruding to the right inside the funnel-shaped wire mesh bag under the blowing of wind, which can increase the filtering area, minimize the influence of wind force while ensuring the filtering effect, and achieve better filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the present invention;
[0017] Figure 2 It is a structural cross-sectional view of the present invention;
[0018] Figure 3 It is a structural cross-sectional view of the sealing box of the present invention;
[0019] Figure 4 For the present invention Figure 3 A partial enlarged view of point A in the middle.
[0020] In the figure: 1. exhaust main pipe; 2. inner convex section; 3. arc-shaped guide plate; 4. guide block; 5. workshop air outlet duct; 6. sealing box; 7. feeding wheel; 8. receiving wheel; 9. filter screen; 10. reset spring; 11. trigger switch; 12. sliding plate; 13. elastic sealing pressure plate; 14. pressure-resistant plate; 15. driving cylinder; 17. sealing ring; 18. inclined surface; 19. slag discharge port; 20. slag discharge pipe. DETAILED DESCRIPTION
[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.
[0022] See also Figure 1-4 The present invention provides a technical solution: a paint shop backflow prevention exhaust system, comprising an exhaust main pipe 1 and three workshop air outlet pipes 5 respectively connected to the exhaust main pipe 1, a circulating filter component is arranged in the middle section of the workshop air outlet pipe 5, and a backflow prevention component is arranged in the inner cavity where the exhaust main pipe 1 and the workshop air outlet pipe 5 are connected;
[0023] The circulating filter assembly includes a sealing box 6 sleeved on the surface of the workshop air outlet duct 5, the workshop air outlet duct 5 is located in a section of the inner cavity of the sealing box 6 and is cut off. The inner cavity of the sealing box 6 is driven by a motor to have a feeding wheel 7 and a receiving wheel 8, respectively. The surfaces of the feeding wheel 7 and the receiving wheel 8 are connected to a filter screen 9 located in the middle of the cutoff of the workshop air outlet duct 5. The surface of the workshop air outlet duct 5 located on the right side of the filter screen 9 is slidably connected to a sliding plate 12, and the left side of the sliding plate 12 is fixedly connected to an elastic sealing pressure plate 13 abutting against the right side of the filter screen 9. The surface of the workshop air outlet duct 5 located on the left side of the filter screen 9 is fixedly connected to the left side of the filter screen 9. A pressure-resistant plate 14 is abutted on the side, and a return spring 10 is fixedly connected to one side of the sliding plate 12. The right end of the return spring 10 is fixedly connected to the left side of the inner cavity of the sealing box 6. A driving cylinder 15 is fixedly connected to the left side of the sealing box 6. The right end of the piston rod of the driving cylinder 15 abuts the left side of the sliding plate 12. A trigger switch 11 electrically connected to the feeding wheel 7 and the receiving wheel 8 is fixedly connected to the right side of the sealing box 6. When in use, the filter screen 9 is located at the cutoff point of the workshop air outlet 5. At this time, the return spring 10 pushes the sliding plate 12 to move to the left, driving the elastic sealing pressure plate 13 to squeeze on the surface of the filter screen 9, cooperating with the pressure-resistant plate 11 on the left side. The plate 14 is sealed and connected to the filter screen 9, isolating it from the outside at the cut-off point of the workshop air outlet duct 5, and leaving a margin that can be extended to the right to form a bag-like structure for filtering. When the filter screen 9 needs to be replaced after a period of use, there is no need to stop the machine. It is only necessary to reduce the wind force of the fan on the workshop air outlet duct 5, and then start the driving cylinder 15 to push the sliding plate 12 to squeeze the reset spring 10 to move to the right, thereby reducing the squeezing force on the filter screen 9. At this time, the sliding plate 12 moves to the right and abuts against the trigger switch 11, and the feeding wheel 7 and the receiving wheel 8 are triggered to rotate, driving the filter screen 9 to move downward, and the adsorbed filter The net 9 moves to the receiving wheel 8 below to be wound around it, and the speed of the feeding wheel 7 is greater than the rotation speed of the receiving wheel 8. The filter net 9 is continuously blown by the wind at the cutoff point of the workshop air outlet duct 5, and a cloth bag structure protruding to the right is formed inside the funnel-shaped wire mesh bag. After the replacement is completed, the driving cylinder 15 is reset, and the reset spring 10 pushes the sliding plate 12 to reset and squeeze the filter net 9 to position it, and then continue the filtering operation. The filter net 9 can be replaced fully automatically without stopping the machine for operation. The replacement effect is good, and it can ensure that the filter net 9 is always in a cloth bag shape, thereby increasing the filtering effect.
[0024] The sealing box 6 and the workshop air outlet duct 5 are sealed by a sealing ring 17, which effectively seals and prevents outside air from entering.
[0025] The left end of the middle cutoff of the workshop air outlet duct 5 is fixedly connected with a cross-shaped supporting steel wire bar, which is closely attached to both sides of the filter screen 9 to limit its position and prevent it from being drastically deformed under the wind.
[0026] The right end of the middle cutoff of the workshop air outlet duct 5 is fixedly connected with a funnel-shaped steel wire mesh bag that is concave to the right. Through the setting of the funnel-shaped steel wire mesh bag, the filter net 9 itself is made of flexible material. Under the blowing of wind, a cloth bag structure that protrudes to the right is formed inside the funnel-shaped steel wire mesh bag, which can increase the filtering area. While ensuring the filtering effect, the influence of wind force is minimized, and the filtering effect is better.
[0027] The bottom of the inner cavity of the sealed box 6 is provided with an inclined surface 18 inclined toward the left side. The bottom of the sealed box 6 is connected to a slag discharge pipe 20 through a slag discharge port 19. Through the setting of the slag discharge pipe 20, the residue inside the sealed box 6 can be discharged, and the interior can be effectively cleaned.
[0028] The anti-backwind component includes an inner convex section 2 opened below the exhaust main pipe 1, and the inner convex section 2 is arranged on the left side of the workshop air outlet duct 5. The inner cavity of the inner convex section 2 is rotatably connected to the arc guide plate 3. Through the setting of the arc guide plate 3, when the workshop air outlet duct 5 blows out too much wind, the arc guide plate 3 is driven by a motor to rotate to the top of the workshop air outlet duct 5, and the exhaust main pipe 1 is diverted from the middle. The exhaust air of the left workshop air outlet duct 5 is transported from above the exhaust air of the right workshop air outlet duct 5, and gathered together to discharge to the right side, effectively guiding the airflow to prevent the wind from being too strong, and the wind in the workshop air outlet duct 5 from flowing back under high pressure into the workshop air outlet duct 5.
[0029] A guide block 4 which is gradually inclined upward from left to right is fixedly connected to the left side of the inner convex section 2, and the airflow is guided by the guide block 4 to move upward.
[0030] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in the form of preferred embodiments, it is not intended to limit the present invention. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A paint shop backflow prevention exhaust system, comprising an exhaust main pipe (1) and three workshop air outlet pipes (5) respectively connected to the exhaust main pipe (1), characterized in that: The middle section of the workshop air outlet pipe (5) is provided with a circulating filter assembly, and the inner cavity at the connection between the exhaust main pipe (1) and the workshop air outlet pipe (5) is provided with an anti-return air assembly; The circulating filter assembly comprises a sealing box (6) sleeved on the surface of a workshop air outlet pipe (5), the workshop air outlet pipe (5) is located in a section of the inner cavity of the sealing box (6) and is cut off, the inner cavity of the sealing box (6) is respectively driven by a motor to have a feeding wheel (7) and a receiving wheel (8), the surfaces of the feeding wheel (7) and the receiving wheel (8) are drivingly connected to a filter screen (9) located in the middle of the cut-off part of the workshop air outlet pipe (5), the surface of the workshop air outlet pipe (5) located on the right side of the filter screen (9) is slidably connected to a sliding plate (12), and the left side of the sliding plate (12) is fixedly connected to an elastic sealing member abutting against the right side of the filter screen (9). A pressure plate (13), the surface of the workshop air outlet duct (5) located on the left side of the filter screen (9) is fixedly connected with a pressure-resistant plate (14) abutting against the left side of the filter screen (9), one side of the sliding plate (12) is fixedly connected with a return spring (10), the right end of the return spring (10) is fixedly connected to the left side of the inner cavity of the sealing box (6), the left side of the sealing box (6) is fixedly connected with a driving cylinder (15), the right end of the piston rod of the driving cylinder (15) abuts against the left side of the sliding plate (12), and the right side of the sealing box (6) is fixedly connected with a trigger switch (11) electrically connected to the feeding wheel (7) and the receiving wheel (8) respectively.
2. The paint shop backflow prevention exhaust system according to claim 1, characterized in that: The sealing box (6) and the workshop air outlet pipe (5) are sealed via a sealing ring (17).
3. The paint shop backflow prevention exhaust system according to claim 1, characterized in that: A cross-shaped supporting steel wire strip is fixedly connected to the left end of the middle cutoff portion of the workshop air outlet pipe (5).
4. The paint shop backflow prevention exhaust system according to claim 1, characterized in that: The right end of the middle cutoff of the workshop air outlet duct (5) is fixedly connected with a funnel-shaped steel wire mesh bag that is recessed to the right. The filter net (9) is made of a flexible material. Under the influence of wind, a cloth bag structure that protrudes to the right is formed inside the funnel-shaped steel wire mesh bag.
5. The paint shop backflow prevention exhaust system according to claim 1, characterized in that: The bottom of the inner cavity of the sealed box (6) is provided with an inclined surface (18) inclined toward the left side. The bottom of the sealed box (6) is connected to a slag discharge pipe (20) through a slag discharge port (19). By providing the slag discharge pipe (20), the residue inside the sealed box (6) can be discharged, thereby effectively cleaning the inside.
6. The paint shop backflow prevention exhaust system according to claim 1, characterized in that: The anti-return air component comprises an inner convex section (2) provided below the exhaust main pipe (1), the inner convex section (2) being arranged on the left side of the workshop air outlet pipe (5), the inner cavity of the inner convex section (2) being rotatably connected with an arc-shaped guide plate (3), through the arrangement of the arc-shaped guide plate (3), when the workshop air outlet pipe (5) blows out too much wind, the arc-shaped guide plate (3) is driven by a motor to rotate to the top of the workshop air outlet pipe (5), so that the exhaust main pipe (1) is diverted from the middle, and the exhaust air of the left workshop air outlet pipe (5) is transported from the top of the exhaust air of the right workshop air outlet pipe (5), and the exhaust air is gathered together and discharged to the right side, so that the airflow is effectively guided, and the wind in the workshop air outlet pipe (5) is prevented from flowing back into the workshop air outlet pipe (5) under high pressure due to the strong wind.
7. The paint shop backflow prevention exhaust system according to claim 6, characterized in that: The left side of the inner convex section (2) is fixedly connected with a guide block (4) which gradually tilts upward from left to right, and the airflow is guided by the guide block (4) so that it moves upward.