A spraying waste gas environmental protection purification device

Abstract

The present invention relates to the technical field of waste gas purification, and discloses an environmentally friendly purification device for waste gas from spraying, including a filter part, wherein the filter part includes a frame with a main shaft fixedly connected in the middle, a plurality of limit frames are arranged inside the frame, a limit member is arranged inside the limit frame, a pressure member is arranged above the limit member, the pressure member is fixedly connected to the outside of the main shaft, and a magnetic member is slidably connected to the lower surface of the pressure member. The invention is provided with a limit member, and when it is found that some filter elements are damaged or the adsorbed particles reach the limit, the staff can use a special tool such as a magnetic structure or a pressure structure to apply a force to the magnetic member inside the limit frame where the corresponding filter element is located, so that the magnetic member is forced to move toward the inside of the limit frame, and the size of the cavity that is tightly fitted with the outside of the filter element is enlarged, and the staff can easily remove the filter element that is damaged or needs to be cleaned and replaced, without disassembling the filter part as a whole, thereby reducing the waste of resources.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas purification, and in particular to an environmentally friendly purification device for spraying waste gas. Background Art

[0002] The waste gas generated during the spraying process mainly includes paint mist and organic waste gas. Paint mist is formed by paint particles that have not reached the spraying surface during the spraying process, while organic waste gas mainly comes from the volatilization of solvents in the paint. Many components in the waste gas, such as benzene, toluene, xylene, etc., are seriously harmful to human health. Long-term exposure to these substances may cause headaches, eye and respiratory irritation, allergic reactions, and even cancer risks. Therefore, in the spraying operation environment, physical adsorption, chemical reactions and other operations are required to thoroughly purify the waste gas generated during the spraying process in order to purify the waste gas in a more environmentally friendly way.

[0003] In actual production, a filter is set before the chemical reaction to purify the organic waste gas. A pre-filter is set to remove larger particles and impurities and reduce pollutants entering the rotor. However, the existing filter layers are mostly integral structures. When part of the filter element is blocked or damaged, the entire filter element needs to be removed for cleaning and maintenance. However, not only is the removal process cumbersome, but the undamaged or normally filtered parts will also be removed, and then the subsequent maintenance steps will be entered, which increases the maintenance cost and wastes the normally used part of the filter element, resulting in a low filtration efficiency of the filter element. In view of this, a spray waste gas environmental protection purification device is provided. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an environmentally friendly purification device for spraying waste gas, which can effectively solve the problems of the difficulty in removing filters and high maintenance costs in the prior art.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides an environmental protection purification device for spraying waste gas, comprising a frame, wherein an air inlet is provided at an upper position outside the frame;

[0009] The filter part comprises a frame with a main shaft fixedly connected in the middle, a plurality of limit frames are arranged inside the frame, a limit piece is arranged inside the limit frame, a pressing piece is arranged above the limit piece, the pressing piece is fixedly connected to the outside of the main shaft, a magnetic piece is slidably connected to the lower surface of the pressing piece, the magnetic piece is fitted with the upper surface of the limit piece, the magnetic piece moves to exert a force on the limit piece, the limit piece is deformed inside the limit frame by the force, a filter element for filtering exhaust gas is arranged on the inner wall of the limit piece, and the deformation of the limit piece is transformed from a state where the sides of the filter element are fully fitted to a state where there is a gap between the two;

[0010] The inner wall of the frame is provided with a cleaning area, and a cleaning element is provided above the cleaning area to drive the filter element to move inside the limiting element.

[0011] Furthermore, the limiting member includes a bottom plate fixedly connected to the bottom end of the inner wall of the limiting frame, a sealing groove is provided on the upper surface of the bottom plate, a slider is slidably connected to the inner wall of the sealing groove, a side plate is fixedly connected to the top of the slider, a rotating shaft is fixedly connected to the top of the side plate, the rotating shaft is rotatably connected to the side of the upper arc block, and a knob spring is sleeved on the outer side of the rotating shaft.

[0012] Furthermore, the limiting member also includes a pressure rod fixedly connected to the outer side of the side plate, the upper surface of the pressure rod is in contact with the lower surface of the magnetic member, the lower surface of the pressure rod is located above the upper arc block and is fixedly connected to a pressure block, and the outer curvature of the pressure block is the same as that of the upper arc block.

[0013] Furthermore, the filter element includes a filter screen for particle filtering, a fixed frame is fixedly connected to the outside of the filter screen, sealing strips are fixedly connected to both sides of the fixed frame, magnetic strips are fixedly connected to the sides of the sealing strips, and a rack is fixedly connected to the top of the fixed frame away from the limit frame.

[0014] Furthermore, a slot engaged with the sealing strip is provided in the middle of the inner wall of the side plate, and a magnetic block magnetically connected to the magnetic strip is provided outside the slot.

[0015] Furthermore, the cleaning member includes a motor fixed on the outside of the frame, the motor output end is transmission-connected with a crank, the other end of the crank is slidably connected with a perforated plate, the side of the perforated plate close to the crank is rotatably connected to the inner wall of the frame via a fixedly connected shaft block, a fan gear is provided at the top of the other side of the perforated plate, a cleaning strip is provided under the fan gear, and the side of the cleaning strip away from the filtering portion is fixedly connected to the outside of the perforated plate.

[0016] Furthermore, an electromagnet is fixedly connected above the cleaning area, and the electromagnet is magnetically connected to a magnetic member above a limiting member that rotates downward and is flush with the cleaning area. Beneficial Effects

[0017] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] The present invention is provided with a limit piece. When it is found that part of the filter element is damaged or the adsorbed particles have reached the limit, the staff can use a special tool such as a magnetic structure or a pressure structure to apply a force to the magnetic piece inside the limit frame where the corresponding filter element is located, so that the magnetic piece is forced to move toward the inside of the limit frame, and the magnetic piece moves from a state of being in contact with the surface of the pressure rod in the middle to a state of being in contact with the surface of the pressure rod at the tail end. While the magnetic piece slides smoothly on the inside of the circular arc groove, it applies a downward force to the pressure rod. The pressure rod is forced to drive the side plate to rotate, and the side plate rotates around the rotating shaft to overcome the elastic force of the knob spring. The two side plates Rotate along the bottom plate toward the inner wall of the side of the limit frame, so as to enlarge the size of the cavity that fits tightly with the outside of the filter element. The staff can easily remove the damaged filter element or the filter element that needs to be cleaned and replaced, without disassembling the filter part as a whole, thus reducing the waste of resources. When reinstalling, insert the new filter element into the enlarged cavity, and then restore the magnetic element to the initial position by changing the magnetic field or force direction of the special tool. The side plate also returns to the position that fits tightly with the outside of the filter element under the tensile force of the elastic deformation recovery of the knob spring, so that the disassembly and replacement can be carried out quickly and conveniently.

[0019] When the size of the cavity surrounded by the upper arc block, the side plate and the bottom plate provided in the present invention increases, the side plates attached to the two sides of the fixed frame rotate synchronously, and the side plates are away from the magnetic field environment of the magnetic strip. When the size of the cavity surrounded by the upper arc block, the side plate and the bottom plate decreases, the side plates rotate in the opposite direction and gradually approach the two sides of the fixed frame. In addition to the elastic deformation recovery force of the knob spring on the top end, the side plates also quickly approach the two sides of the fixed frame under the magnetic force of the magnetic strip, so that the sealing strip is engaged with the card groove on the inner side of the side plate, so that the installation and fixation of the filter element is quickly realized while improving the sealing effect between the limiter and the filter element.

[0020] The present invention is provided with a cleaning part. The motor starts to drive the crank to rotate, and the rotation of the crank drives the round block to slide on the inner side of the orifice plate. At the same time, the lateral dimension of the crank rotation drives the orifice plate to swing with the shaft block at the top as the center, and the orifice plate drives the cleaning strip to swing synchronously, thereby avoiding cleaning the filter screen and clogging it, thereby improving the service life of the unit filter screen and its cleaning efficiency. The orifice plate drives the fan gear to swing, and the fan gear transmission drives the rack meshing with it to move, and the rack drives the fixed frame to slide in the enlarged cavity of the limiter. Therefore, while cleaning the outside of the filter screen, it also swings itself to achieve a better cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the internal connection structure of a single limit frame according to an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of the limiter according to an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of a filter connection structure according to an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the connection between a pressure rod and a pressure block according to an embodiment of the present invention;

[0027] Figure 6 Schematic diagram of the cleaning area structure of an embodiment of the present invention.

[0028] The numbers in the figure represent: 1. frame; 11. cleaning area; 12. air inlet; 2. filter part; 21. frame; 22. limit frame; 23. magnetic part; 24. limit part; 241. upper arc block; 242. side plate; 243. bottom plate; 244. sealing groove; 245. slider; 246. pressure rod; 247. rotating shaft; 248. knob spring; 249. pressure block; 25. filter element; 251. filter screen; 252. fixing frame; 253. sealing strip; 254. magnetic strip; 255. rack; 3. cleaning part; 31. motor; 32. crank; 33. orifice plate; 34. cleaning strip; 35. fan gear; 4. electromagnet; 5. main shaft; 51. pressure part. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention will be further described below in conjunction with the embodiments. Example

[0031] See also Figure 1-Figure 6 The present invention provides a technical solution for an environmentally friendly purification device for waste gas from spraying: the device includes a frame 1, a filter unit 2 is arranged inside the frame 1, the filter unit 2 can rotate inside the frame 1 through a main shaft 5 fixedly connected in the middle, the main shaft 5 is connected to a driving member connected to a control system, and can drive the main shaft 5 and the filter unit 2 to rotate synchronously and intermittently, an air inlet 12 is opened at the upper position of the outer side of the frame 1, the waste gas generated by spraying will contact the air inlet 12 with the filter unit 2 through a pipeline, the side of the filter unit 2 is close to the inner wall of the frame 1, and the waste gas will be directly filtered by the filter unit 2 after passing through the air inlet 12 and then transmitted out of the equipment, and the two are fitted to reduce the possibility of waste gas escaping to the corners inside the frame 1.

[0032] like Figure 1 and Figure 2 As shown, the filter unit 2 includes a frame 21 fixedly connected to the circumferential outer surface of the main shaft 5, and the interior of the frame 21 is evenly divided into a plurality of limit frames 22. In the present invention, six are set, and the number can be changed as needed. The number needs to be the same as the number of times the main shaft 5 stops intermittently during one rotation. The purpose is that the main shaft 5 drives the frame 21 to rotate one circle, and the limit frames 22 can pass through the air inlet 12 in sequence, and the air inlet 12 is always located at the center position when the gap stops. A pressing piece 51 is fixedly connected to the upper surface of the inner wall of the limit frame 22, and the pressing piece 51 is fixedly connected to the outer side of the main shaft 5. An arc groove is opened on the lower surface of the pressing piece 51, and a magnetic piece 23 is slidably connected to the inner side of the arc groove. The magnetic piece 23 is set to a truncated cone shape, and a limit piece 24 is set at the bottom end of the magnetic piece 23. The limit piece 24 is located on the inner side of the limit frame 22, and a filter element 25 is set on the inner side of the limit piece 24.

[0033] like Figure 2 , Figure 3 and Figure 5As shown, the limiting member 24 includes a bottom plate 243 fixedly connected to the bottom end of the inner wall of the limiting frame 22, and the side of the bottom plate 243 is slidably sealed with a side plate 242. The top of the side plate 242 is rotatably connected to the side of the upper arc block 241 through a rotating shaft 247, and a knob spring 248 is sleeved on the outer side of the rotating shaft 247. Under the initial condition, under the elastic force restriction of the knob spring 248, the upper arc block 241, the side plate 242 and the bottom plate 243 jointly form a cavity, and the filter element 25 is placed in the cavity. The side of the side plate 242 is fixedly connected with a pressure filter. The upper surface of the pressure rod 246 contacts the middle position of the lower surface of the magnetic member 23 in the initial state. When the magnetic member 23 moves into the limit frame 22, it will exert a force on the upper surface of the pressure rod 246, so that the pressure rod 246 rotates. The bottom end of the pressure rod 246 is fixedly connected to a pressure block 249, and the pressure block 249 is set to be an arc block that fits the upper surface of the upper arc block 241. The pressure rod 246 drives the side plate 242 to rotate around the rotating shaft 247. The bottom end of the side plate 242 is fixedly connected to a slider 245, and the side plate 242 will drive the slider 245 to rotate. The block 245 slides on the inner side of the bottom plate 243. The size of the bottom plate 243 is equal to the size of the inner wall of the limit frame 22. The inner wall of the bottom plate 243 is provided with a sealing groove 244. Therefore, the side plate 242 can drive the slider 245 to slide along the sealing groove 244 at the top of the bottom plate 243. The two side plates 242 rotate synchronously to change the internal size of the cavity surrounded by the upper arc block 241, the side plate 242 and the bottom plate 243. In the initial state, that is, when there is no external force, the size of the enclosed cavity is the smallest. The side plate 242 is a retractable member with changeable size. At this time, the size of the side plate 242 is the smallest. As the side plate 242 rotates, the bottom end is slidably sealed with the bottom plate 243, and the upper end rotates around the rotating shaft 247. Therefore, in the subsequent rotation process, the side plate 242 can be stretched to a certain size as needed. When the size of the cavity surrounded by the upper arc block 241, the side plate 242 and the bottom plate 243 is the smallest, it fits tightly against the outside of the filter element 25. When the size of the cavity changes, the filter element 25 has a fixed state that fits tightly against the limit member 24, and then changes to a movable connection state.

[0034] When it is found that some of the filter elements 25 are damaged or the adsorbed particles have reached the limit, the staff can use special tools such as magnetic structures or pressure structures to apply a force to the magnetic member 23 inside the limit frame 22 where the corresponding filter element 25 is located, so that the magnetic member 23 is forced to move toward the inside of the limit frame 22, and the magnetic member 23 moves from a state of contact with the surface of the middle part and the pressure rod 246 to a state of contact with the surface of the pressure rod 246 at the tail end. While the magnetic member 23 slides smoothly on the inside of the arc groove, it applies a downward force to the pressure rod 246. The pressure rod 246 is forced to drive the side plate 242 to rotate, and the side plate 242 rotates around the rotating shaft 247 to overcome the elastic force of the knob spring 248. The force applied by the special tool is greater than the pressure rod 246 and the side plate 242. Due to the vertical gravity component and the elastic force of the knob spring 248, the two side panels 242 rotate along the bottom plate 243 toward the inner wall of the side of the limit frame 22, thereby increasing the size of the cavity that fits tightly against the outside of the filter element 25. The staff can easily remove the filter element 25 that is damaged or needs to be cleaned and replaced without disassembling the filter unit 2 as a whole, thus reducing the waste of resources. When reinstalling, the new filter element 25 is inserted into the enlarged cavity, and then the magnetic element 23 is restored to its initial position by changing the magnetic field or force direction of the special tool. The side panel 242 is also restored to a position that fits tightly against the outside of the filter element 25 under the action of the tension of the elastic deformation recovery of the knob spring 248, so that disassembly and replacement can be performed quickly and conveniently.

[0035] refer to Figure 2 , Figure 3 and Figure 4 The filter element 25 includes a filter screen 251 for filtering spray particles. A fixed frame 252 is sleeved on the outer side of the filter screen 251. The top of the fixed frame 252 is in contact with the bottom of the upper arc block 241. The bottom of the filter screen 251 is in contact with the top of the bottom plate 243. Sealing strips 253 are fixedly connected to the middle of both sides of the filter screen 251. The sealing strips 253 are engaged with the slots provided on the inner walls of the side plates 242. Magnetic strips 254 are provided on both sides of the sealing strip 253. The magnetic strips 254 are magnetically connected to the magnetic blocks fixedly connected to the inner walls of the side plates 242.

[0036] When the size of the cavity surrounded by the upper arc block 241, the side plate 242 and the bottom plate 243 becomes larger, the side plates 242 attached to the two sides of the fixed frame 252 rotate synchronously, and the side plates 242 move away from the magnetic field environment of the magnetic strip 254. When the size of the cavity surrounded by the upper arc block 241, the side plates 242 and the bottom plate 243 becomes smaller, the side plates 242 rotate in the opposite direction and gradually approach the two sides of the fixed frame 252. In addition to the elastic deformation recovery force of the knob spring 248 on the top end, the side plates 242 quickly approach the two sides of the fixed frame 252 under the magnetic force of the magnetic strip 254, so that the sealing strip 253 is engaged with the card groove on the inner side of the side plate 242, so as to quickly realize the installation and fixation of the filter element 25 while improving the sealing effect between the limit member 24 and the filter element 25.

[0037] refer to Figure 1 and Figure 6 A cleaning area 11 is provided on the inner wall of the frame 1. The cleaning area 11 is set to be slightly larger than the size of the filter element 25 in the shape of a sector. The filter element 25 for filtering particles will gradually rotate from the position where the center coincides with the air inlet 12 to the position flush with the cleaning area 11 as the main shaft 5 rotates. An electromagnet 4 is provided above the cleaning area 11. When one of the filter elements 25 moves to the position flush with the cleaning area 11 below after intermittent rotation, the electromagnet 4 coincides with the magnetic element 23. The magnetic field generated by the electromagnet 4 when it is energized and the magnetic field of the magnetic element 23 repel each other. The magnetic element 23 slides along the lower surface of the pressing element 51. The sliding of the magnetic element 23 exerts an effect on the upper surface of the pressing rod 246. The pressing rod 246 is forced to push the side plate 242 to rotate around the rotating shaft 247, so that the inner wall of the side plate 242 is no longer in contact with the outer side of the fixed frame 252. The upper and lower ends of the fixed frame 252 are respectively in contact with the bottom end of the upper arc block 241 and the top end of the bottom plate 243.

[0038] refer to Figure 1 and Figure 6 A cleaning member 3 is provided above the cleaning area 11. The cleaning member 3 includes a motor 31 provided outside the frame 1. A crank 32 is fixedly connected to the other end of the motor 31. A round block is provided at the other end of the crank 32. The round block can slide in the slot hole inside the orifice plate 33. The size of the slot hole opened on the inner side of the orifice plate 33 is slightly larger than twice the length of the crank 32. When the crank 32 rotates one circle, its longitudinal displacement is equal to the size of the round block at one end of the crank 32 sliding in the slot hole inside the crank 32. Its lateral displacement can drive the orifice plate 33 to move. A shaft block is fixedly connected to the top of one side of the orifice plate 33 close to the crank 32. The shaft block is rotatably connected to the inner wall of the frame 1. A fan gear 35 is fixedly connected to the top of the other side of the crank 32. Figure 4 As shown, a rack 255 is fixedly connected to the top of one side of the fixed frame 252, and the bottom end of the fan gear 35 can be meshed with the upper surface of the rack 255. A cleaning strip 34 is provided below the fan gear 35. The width of the cleaning strip 34 is greater than the width of the fan gear 35. One end of the cleaning strip 34 is in contact with the surface of the filter screen 251, and the other end of the cleaning strip 34 is fixedly connected to one side of the crank 32. There is a certain gap between the fan gear 35 and the cleaning strip 34, and the width of the gap is the same as the ring width of the rack 255. The overall rotation of the filter element 25 drives the rack 255 to rotate synchronously, and the bottom end of the rack 255 slides along the top of the cleaning strip 34 until it meshes with the bottom end of the fan gear 35.

[0039] The intermittent rotation of the main shaft 5 drives the frame 21 to rotate intermittently, and the limit frame 22 passes through the air inlet 12 once to perform particle adsorption and filtration. The filter element 25 that has completed the filtration continues to rotate with the limit frame 22 until it rotates to a position where the bottom end is flush with the cleaning area 11. Since the size of the cleaning area 11 is larger than the size of the filter element 25, the upper surface of the rack 255 located above contacts the bottom end of the fan gear 35 of the cleaning element 3, and the two are meshed with each other. At the same time, the electromagnet 4 above the cleaning area 11 is in a power-on state, and the magnetic element 23 enters the magnetic induction field of the electromagnet 4. The magnetic poles of the electromagnet 4 and the magnetic element 23 repel each other. The magnetic element 23 is acted upon by the repulsive force and moves toward the inner wall of the limit frame 22 along the arc groove set on the lower surface of the pressing element 51. Since the size of the magnetic element 23 gradually increases from the inside to the outside, the diameter of the contact with the pressing rod 246 gradually increases during the movement of the magnetic element 23. The magnetic element 23 applies a downward force to the pressing rod 246, and the pressing rod 246 pushes the side plate 242 to rotate with the rotating shaft 247 The two side plates 242 rotate synchronously in opposite directions, and the side plates 242 are no longer in contact with the sides of the fixed frame 252. At this time, only the top and bottom ends of the fixed frame 252 are in contact with the inner side of the cavity, and at the same time, the motor 31 starts to drive the crank 32 to rotate. The rotation of the crank 32 drives the round block to slide on the inner side of the orifice plate 33. At the same time, the lateral dimension of the rotation of the crank 32 drives the orifice plate 33 to swing around the shaft block at the top, and the orifice plate 33 drives the cleaning bar 34 to swing synchronously, thereby avoiding cleaning of the filter screen 251 and preventing it from being blocked, thereby improving the service life and cleaning efficiency of the unit filter screen 251, and the orifice plate 33 drives the fan gear 35 to swing, and the swing of the fan gear 35 drives the rack 255 meshing with it to move, and the rack 255 drives the fixed frame 252 to slide in the enlarged cavity of the limiter 24. Therefore, while cleaning the outside of the filter screen 251, it also swings itself to achieve a better cleaning effect. The filter screen 251 can also be cleaned without stopping the machine to suspend filtering.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spraying waste gas environmental protection purification device, characterized in that: include: A frame (1), wherein an air inlet (12) is provided at an upper position on the outer side of the frame (1); A filter part (2), the filter part (2) comprising a frame (21) with a main shaft (5) fixedly connected to the middle part, a plurality of limit frames (22) being arranged inside the frame (21), a limit member (24) being arranged inside the limit frame (22), a pressing member (51) being arranged above the limit member (24), the pressing member (51) being fixedly connected to the outside of the main shaft (5), a magnetic member (23) being slidably connected to the lower surface of the pressing member (51), the magnetic member (23) being in contact with the upper surface of the limit member (24), the magnetic member (23) moving to exert a force on the limit member (24), the limit member (24) being deformed inside the limit frame (22) by the force, a filter member (25) for filtering exhaust gas being arranged on the inner wall of the limit member (24), the deformation of the limit member (24) is due to the state in which the side of the filter member (25) is fully in contact with the filter member (25) being changed to a state in which there is a gap between the two; The inner wall of the frame (1) is provided with a cleaning area (11), and above the cleaning area (11) is provided a cleaning element (3) for driving the filter element (25) to move inside the limiting element (24); The limiting member (24) comprises a bottom plate (243) fixedly connected to the bottom end of the inner wall of the limiting frame (22); a sealing groove (244) is provided on the upper surface of the bottom plate (243); a slider (245) is slidably connected to the inner wall of the sealing groove (244); a top end of the slider (245) is fixedly connected to a side plate (242); a top end of the side plate (242) is fixedly connected to a rotating shaft (247); the rotating shaft (247) is rotatably connected to the side of the upper arc block (241); and a knob spring (248) is sleeved on the outer side of the rotating shaft (247).

2. The environmental protection purification device for spraying waste gas according to claim 1 is characterized in that: The limiting member (24) further comprises a pressure rod (246) fixedly connected to the outer side of the side plate (242), the upper surface of the pressure rod (246) being in contact with the lower surface of the magnetic member (23), the lower surface of the pressure rod (246) being located above the upper arc block (241) and fixedly connected to a pressure block (249), the outer curvature of the pressure block (249) being the same as that of the upper arc block (241).

3. The environmental protection purification device for spraying waste gas according to claim 2 is characterized in that: The filter element (25) comprises a filter screen (251) for filtering particles, a fixed frame (252) being fixedly connected to the outside of the filter screen (251), sealing strips (253) being fixedly connected to both sides of the fixing frame (252), a magnetic strip (254) being fixedly connected to the side of the sealing strip (253), and a rack (255) being fixedly connected to the top of a side of the fixing frame (252) away from the limiting frame (22).

4. The environmental protection purification device for spraying waste gas according to claim 3 is characterized in that: A slot for engaging with the sealing strip (253) is provided in the middle of the inner wall of the side plate (242), and a magnetic block for magnetic connection with the magnetic strip (254) is provided outside the slot.

5. The environmental protection purification device for spraying waste gas according to claim 4 is characterized in that: The cleaning member (3) comprises a motor (31) fixed to the outside of the frame (1); the output end of the motor (31) is drivingly connected to a crank (32); the other end of the crank (32) is slidably connected to a perforated plate (33); a side of the perforated plate (33) close to the crank (32) is rotatably connected to the inner wall of the frame (1) via a fixedly connected shaft block; a fan gear (35) is provided at the top end of the other side of the perforated plate (33); a cleaning bar (34) is provided below the fan gear (35); and a side of the cleaning bar (34) away from the filter portion (2) is fixedly connected to the outside of the perforated plate (33).

6. The environmental protection purification device for spraying waste gas according to claim 1 is characterized in that: An electromagnet (4) is fixedly connected above the cleaning area (11), and the electromagnet (4) is magnetically connected to a magnetic member (23) above a limiting member (24) that rotates downward and is flush with the cleaning area (11).

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