Air filtering device for plastic processing

Abstract

The invention relates to the technical field of air conditioning equipment, and discloses an air filtering device for plastic processing, which comprises a shell, a mounting cylinder is arranged in the middle of the lower end of the shell, the lower end of the mounting cylinder is communicated with a discharge pipe, and a central shaft is mounted on the inner wall of the mounting cylinder through a fixing frame; a central shaft is arranged in the shell, an impeller is arranged on the central shaft, a filtering assembly is placed at the upper end of the mounting cylinder, a rotating shaft is mounted on the inner top wall of the shell, a spraying frame is mounted on the rotating shaft, a liquid pump is arranged above the shell, and the liquid outlet end of the liquid pump is communicated with the spraying frame through a communicating bent pipe; a filtering frame is jointly installed between the installation cylinder and the shell, and a cleaning assembly is jointly installed between the spraying frame and the shell. By means of the mode that the filtering assembly and spraying are combined, all-around and multi-layer purification of various pollutants in plastic processing waste gas is achieved; the cleaning assembly effectively prevents the filtering frame from being blocked due to accumulation of pollutants, and good ventilation and filtering performance of the filtering frame is maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and particularly relates to an air filtration device for plastic processing. Background Art

[0002] In the plastic processing industry, with the increasingly strict environmental protection standards and the increasing attention to the health of workers, it has become particularly crucial to efficiently treat the polluted air generated during the production process. Plastic processing involves a variety of complex processes, such as extrusion, injection molding, blow molding, etc. These processes will release pollutants with complex components, including dust particles, volatile organic compounds, and harmful gases. For example, in the heating process, a large amount of plastic raw materials will release toxic gases, which will not only pose a serious threat to the physical health of workers in the workshop and may cause occupational diseases if inhaled for a long time, but also, if discharged into the atmosphere without effective treatment, will cause light pollution, damage plant growth, and affect the ecological balance.

[0003] Currently, there are various air filtration devices on the market for treating plastic processing waste gas. Some traditional devices use a single filter screen, which only intercepts particulate matter through a simple fiber filter screen. However, in the face of the complex pollutants generated by plastic processing, the disadvantages of this single filter screen are obvious. On the one hand, it cannot take into account the filtration of pollutants with different properties and particle sizes, and the removal effects on fine dust, oily particles, and harmful gases are not good, resulting in the purified air being difficult to meet the strict air quality standards. On the other hand, the filter screen is easily blocked by pollutants. Frequent replacement of the filter screen not only increases the cost but also increases the maintenance workload. To improve the filtration effect, some air purification devices introduce chemical filtration. For example, a plastic waste gas filtration device disclosed in CN202421369131.2, but the patented device lacks in terms of cleaning and maintenance. After long-term operation, a large amount of pollutants accumulate on the surface of the filtration component, but there is no effective automatic cleaning mechanism. It requires frequent manual disassembly and cleaning, which consumes manpower and time, and is also prone to component damage due to frequent disassembly, affecting the service life of the device.

[0004] Therefore, it is necessary to provide an air filtration device for plastic processing to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an air filtration device for plastic processing to solve the existing problems in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An air filtration device for plastic processing, comprising a housing, a base frame is provided on the housing, an air outlet pipe and a liquid outlet pipe are communicated with the housing, an installation cylinder is provided in the middle of the lower end of the housing, the installation cylinder is communicated with an air inlet pipe, a pressure increasing valve is communicated on the air inlet pipe, a discharge pipe is communicated at the lower end of the installation cylinder, a valve is provided on the discharge pipe, a central shaft is installed on the inner wall of the installation cylinder through a fixing frame, an impeller is provided on the central shaft, and the impeller is located above the air inlet pipe, the upper end of the installation cylinder is an opening, a filtration assembly is placed at the upper end of the installation cylinder, and the filtration assembly is sleeved outside the central shaft, a rotating shaft is installed on the inner top wall of the housing, and the rotating shaft is sleeved outside the central shaft, a spraying frame is installed on the rotating shaft, a liquid pump is provided above the housing, and the liquid outlet end of the liquid pump is communicated with the spraying frame through a connecting elbow, a filtration frame is jointly installed between the installation cylinder and the housing, a cleaning assembly is jointly installed between the spraying frame and the housing, and the cleaning assembly simultaneously cleans the filtration frame and the filtration assembly, and the filtration assembly is located above the filtration frame.

[0008] As a further scheme of the present invention, the cleaning assembly includes a planetary end face gear frame, an installation ring groove is opened on the inner side wall of the housing, and the planetary end face gear frame is arranged in the installation ring groove, a sliding ring groove is opened on the inner wall of the installation ring groove, a sliding seat is slidably connected in the sliding ring groove, a horizontal cleaning roller is provided on the sliding seat, and the horizontal cleaning roller cleans the surface of the filtration frame, a connecting frame is provided on the horizontal cleaning roller, a connecting column is provided on the upper end face of the connecting frame, a positioning hole is opened on the lower end face of the spraying frame, and the upper end of the connecting column is inserted into the positioning hole, a transmission gear is installed on the horizontal cleaning roller, and the transmission gear meshes with the planetary end face gear frame, and one end of the horizontal cleaning roller away from the transmission gear is connected with a vertical cleaning roller through a universal joint, and the vertical cleaning roller cleans the surface of the filtration assembly.

[0009] As a further scheme of the present invention, a liquid guiding seat is provided on the outer surface of the rotating shaft, and the liquid guiding seat is located above the filtration assembly, a limiting ring groove is opened on the lower end face of the liquid guiding seat, a limiting seat is provided on the upper end of the vertical cleaning roller, and the limiting seat is slidably connected in the limiting ring groove.

[0010] As a further scheme of the present invention, a limiting card slot is provided on the outer side wall of the central shaft, and the limiting card slot is communicated with the upper end face of the central shaft, a circular groove is opened on the lower end face of the rotating shaft, and the upper part of the central shaft is located in the circular groove, a limiting card strip is provided on the inner side wall of the circular groove, and the limiting card strip is clamped in the limiting card slot.

[0011] As a further scheme of the present invention, the connecting elbow is located in the rotating shaft and is communicated with the inside of the spraying frame, the spraying frame includes a spraying disc, and the spraying disc is installed outside the rotating shaft and is communicated with the connecting elbow, the spraying disc is communicated with a spraying support seat outside, and a spray head is communicated below the spraying support seat.

[0012] As a further solution of the present invention, the filtering component sequentially includes an inner filtering sleeve, a middle filtering sleeve, and an outer filtering sleeve from inside to outside.

[0013] As a further solution of the present invention, the housing includes an upper housing and a lower housing, and a gasket is provided between the upper housing and the lower housing and they are connected by locking screws. The air outlet pipe is arranged on the upper housing, the liquid outlet pipe is arranged on the lower housing, and the lower part of the lower housing is inclined.

[0014] Through the deep integration of the filtering component and the spraying system, the present invention greatly improves the filtering ability of plastic processing waste gas. The spraying rack rotates stably during the operation of the equipment, spraying the spraying liquid evenly and finely into a mist shape, enabling the water mist to fully blend with the rising air. The water mist can not only capture residual dust particles by virtue of its own wetting characteristics, but also efficiently absorb some water-soluble harmful gases. The combination of the filtering component and spraying realizes the all-round and multi-level purification of various pollutants in plastic processing waste gas. The cleaning component effectively prevents the filtering rack from being blocked due to the accumulation of pollutants, maintains its good filtering performance, and at the same time ensures that all parts of the filtering component can be fully cleaned, greatly reducing the residue of pollutants in the pores of the filtering component and avoiding pore blockage, thereby significantly extending the service life of the filtering component. Description of the Drawings

[0015] The present invention will be further described below with reference to the drawings and embodiments.

[0016] Figure 1 is the perspective view of the present invention;

[0017] Figure 2 is the structural schematic diagram of the present invention;

[0018] Figure 3 is the cross-sectional view of the present invention;

[0019] Figure 4 is the schematic diagram of the lower housing and its internal structure in Embodiment 3 of the present invention;

[0020] Figure 5 is the perspective view of the lower housing and its internal structure in Embodiment 3 of the present invention;

[0021] Figure 6 is the schematic diagram of the upper housing and its internal structure in Embodiment 3 of the present invention;

[0022] Figure 7 is the perspective view of the upper housing and its internal structure in Embodiment 3 of the present invention;

[0023] Figure 8 is the structural schematic diagram of the combined state of the spraying rack and the cleaning component in the present invention;

[0024] Figure 9 is an enlarged view of a partial structure of the spray rack in the present invention;

[0025] Figure 10 is an enlarged view of a partial structure of the filter assembly in the present invention.

[0026] In the figure: 1. housing; 101. lower housing; 102. upper housing; 2. liquid pump; 3. pressure increasing valve; 4. air inlet pipe; 5. discharge pipe; 6. liquid outlet pipe; 7. air outlet pipe; 8. filter rack; 9. installation ring groove; 10. planetary end face gear rack; 11. horizontal cleaning roller; 12. connecting column; 13. vertical cleaning roller; 14. spray rack; 1401. spray disc; 1402. spray support; 15. installation cylinder; 16. impeller; 17. central shaft; 18. liquid guiding seat; 19. transmission gear; 20. connecting frame; 21. rotating shaft; 22. communicating elbow; 23. limit card slot; 24. outer layer filter sleeve; 25. limit seat; 26. limit ring groove; 27. limit card strip; 28. middle layer filter sleeve; 29. inner layer filter sleeve. Detailed implementation manners

[0027] Embodiment 1

[0028] Refer to Figure 1 —10, an air filtration device for plastic processing, including a housing 1, a base frame is provided on the housing 1, an air outlet pipe 7 and a liquid outlet pipe 6 are communicated with the housing 1, the lower part of the housing 1 is inclined at a certain angle, and the gravity is used to ensure that the liquid can be discharged efficiently and smoothly through the liquid outlet pipe 6. A flow regulating valve and a water quality monitoring sensor are also installed on the liquid outlet pipe 6. The flow regulating valve can be adjusted according to the actual liquid discharge amount, and the water quality monitoring sensor can monitor the pollution degree of the discharged liquid in real time, so as to adjust the operation parameters of the device in time or perform subsequent processing. The middle part of the lower end of the housing 1 is provided with an installation cylinder 15, and the installation cylinder 15 and the housing 1 are integrally formed structures to ensure good sealing performance and stability. The installation cylinder 15 is communicated with an air inlet pipe 4, a pressure increasing valve 3 is communicated with the air inlet pipe 4, and the pressure increasing valve 3 adopts a high-precision electric regulating valve, which can accurately adjust the inlet air pressure according to the pressure and air flow requirements in the device to ensure the stable entry of air into the device. The lower end of the installation cylinder 15 is communicated with a discharge pipe 5, the lower part of the installation cylinder 15 is inclined at a certain angle, and the gravity is used to ensure that the material can be discharged through the discharge pipe 5. A valve is provided on the discharge pipe 5, and the valve is an electric ball valve, which can realize remote control and automatic operation, and is convenient to open or close in time according to the material accumulation situation.

[0029] The inner wall of the installation cylinder 15 is provided with a central shaft 17 through a fixing frame. An impeller 16 is arranged on the central shaft 17, and the impeller 16 is located above the air inlet pipe 4. The upper end of the installation cylinder 15 is open, and a filtering assembly is placed at the upper end of the installation cylinder 15. The filtering assembly is sleeved outside the central shaft 17. The filtering assembly sequentially includes an inner filtering sleeve 29, a middle filtering sleeve 28, and an outer filtering sleeve 24 from inside to outside. The inner filtering sleeve 29 is made of a high-efficiency filter screen material, such as fiberglass filter paper, and can effectively filter fine particles with a particle size less than 1 μm; the middle filtering sleeve 28 is made of synthetic fiber filter material and can filter medium particles with a particle size between 1 and 5 μm; the outer filtering sleeve 24 is made of coarse-effect non-woven fabric material and mainly filters large particle dust and impurities. A rotating shaft 21 is installed on the inner top wall of the housing 1, and the rotating shaft 21 is sleeved outside the central shaft 17. A spraying frame 14 is installed on the rotating shaft 21. A liquid pump 2 is arranged above the housing 1. The liquid outlet end of the liquid pump 2 is communicated with the spraying frame 14 through a connecting elbow 22. A filtering frame 8 is jointly installed between the installation cylinder 15 and the housing 1. The filtering frame 8 adopts a multi-layer composite filtering structure to further remove residual impurities and liquid droplets in the air. The connecting elbow 22 is located inside the rotating shaft 21 and is communicated with the inside of the spraying frame 14. The spraying frame 14 includes a spraying disc 1401, and the spraying disc 1401 is installed outside the rotating shaft 21 and is communicated with the connecting elbow 22. Spray supports 1402 are communicated outside the spraying disc 1401. The spray supports 1402 are radially distributed on the outer periphery of the spraying disc 1401, and the quantity is reasonably set according to the size of the device and the processing requirements. Spray heads are communicated below the spray supports 1402. The spray heads adopt atomizing spray heads, which can atomize the liquid into fine water droplets, increase the contact area with the air, and improve the effect of spray washing.

[0030] The air containing pollutants enters the installation cylinder 15 through the air inlet pipe 4. The pressure increasing valve 3 on the air inlet pipe 4 can adjust the intake air pressure according to the actual situation to ensure the stable entry of air. The airflow impacts the impeller 16 to make it rotate. On the one hand, the rotation of the impeller 16 can initially stir the air to make the pollutants more evenly distributed, which is beneficial to subsequent filtering; on the other hand, it can assist in air intake and improve the intake efficiency. During the upward movement of the air, it first passes through the pre-filtering of the filtering assembly. The inner filtering sleeve 29, the middle filtering sleeve 28, and the outer filtering sleeve 24 filter the air layer by layer from inside to outside, intercepting pollutants such as dust particles with different particle sizes from fine to coarse, and initially purifying the air.

[0031] The pre-filtered air continues to rise and enters the shell 1, and the liquid pump 2 draws external cleaning liquid and transports the liquid to the spray rack 14 through the connecting elbow 22. The spray disc 1401 of the spray rack 14 is connected to the rotating shaft 21. The airflow generated by the air flow drives the rotating shaft 21 to rotate, and then the spray disc 1401 and the spray support 1402 connected thereto and the spray head rotate together. The rotating spray head sprays the liquid evenly in the air, and the water mist is in full contact with the air to further capture the residual dust particles and absorb some water-soluble harmful gases to achieve deep purification of the air. The air after spray washing continues to move upward and passes through the filter rack 8 between the installation cylinder 15 and the shell 1 for secondary filtration to further remove residual impurities and droplets in the air. The purified air is finally discharged from the device through the outlet pipe 7 and transported to areas such as workshops that require clean air.

[0032] During the spray washing process, the sewage formed by the mixture of liquid and pollutants is collected to the liquid outlet pipe 6 under the action of gravity because the lower part of the shell 1 is inclined at a certain angle, and is discharged from the device through the liquid outlet pipe 6 for subsequent centralized treatment. The lower part of the installation cylinder 15 is also inclined at a certain angle. The larger particles of material intercepted during the air intake and rotation of the impeller 16 move toward the discharge pipe 5 along the inclined lower part of the installation cylinder 15 under the action of gravity. The valve on the discharge pipe 5 is opened and the material can be discharged to prevent the material from accumulating in the device and affecting the operation.

[0033] Embodiment 2

[0034] Based on Example 1, refer to Figure 2 —5 and Figure 8 A cleaning component is installed between the spray frame 14 and the shell 1 , and the cleaning component cleans the filter frame 8 and the filter component at the same time, and the filter component is located above the filter frame 8 .

[0035] The cleaning component includes a planetary end face gear carrier 10. An installation ring groove 9 is provided on the inner side wall of the housing 1, and the planetary end face gear carrier 10 is arranged in the installation ring groove 9. A sliding ring groove is provided on the inner wall of the installation ring groove 9. A sliding seat is slidably connected in the sliding ring groove. A horizontal cleaning roller 11 is provided on the sliding seat, and the horizontal cleaning roller 11 cleans the surface of the filter rack 8. A special cleaning brush is wrapped on the surface of the horizontal cleaning roller 11. The brush is made of a mixed material of nylon and polyester fiber, and has the characteristics of high elasticity, high adsorption and wear resistance. These brushes are processed by encryption, and can capture and clean the dust and impurities on the surface of the filter rack 8 more effectively. A connecting frame 20 is provided on the horizontal cleaning roller 11. A connecting column 12 is provided on the upper end face of the connecting frame 20. A positioning hole is provided on the lower end face of the spray rack 14, and the upper end of the connecting column 12 is inserted into the positioning hole. The inner wall of the positioning hole is provided with a rubber sealing ring, which can ensure the tight connection between the connecting column 12 and the positioning hole, and at the same time reduce the vibration and noise during the movement. A transmission gear 19 is installed on the horizontal cleaning roller 11, and the transmission gear 19 meshes with the planetary end face gear carrier 10. One end of the horizontal cleaning roller 11 away from the transmission gear 19 is connected with a vertical cleaning roller 13 through a universal joint. The universal joint is made of high-quality carbon steel and is formed by forging and machining. The internal structure of the universal joint is optimized, and can adapt to the angle change between the horizontal cleaning roller 11 and the vertical cleaning roller 13 while transmitting torque, ensuring the smoothness of the movement, and the vertical cleaning roller 13 cleans the surface of the filter component. A liquid guide seat 18 is provided on the outer surface of the rotating shaft 21, and the liquid guide seat 18 is located above the filter component. A limiting ring groove 26 is provided on the lower end face of the liquid guide seat 18. A limiting seat 25 is provided on the upper end of the vertical cleaning roller 13, and the limiting seat 25 is slidably connected in the limiting ring groove. The liquid guide seat 18 provides limiting and guiding for the movement of the vertical cleaning roller 13 on the one hand, and on the other hand, it can reduce the spray liquid from spraying onto the filter component. The shape of the liquid guide seat 18 is similar to an umbrella-shaped structure, and the top is relatively wide, which can block and disperse part of the spray liquid when the spray rack 14 sprays the spray liquid downward. When the spray liquid is sprayed onto the liquid guide seat 18, the surface of the liquid guide seat 18 will guide the spray liquid to flow down along its edge in a relatively gentle manner, forming an annular water curtain. In this way, a large amount of spray liquid is prevented from directly spraying onto the filter component with a large impact force. Because if the spray liquid directly sprays onto the filter component in a large amount and with a strong force, it may cause the pores of the filter component to be blocked, affecting its filtering performance, and at the same time, some pollutants may be washed into the deep part of the filter component, making it difficult to clean. The presence of the liquid guide seat 18 enables the spray liquid to contact the filter component more evenly and gently, which not only ensures the wetting and cleaning effect on the filter component, but also reduces the damage to the filter component, and helps to maintain the long-term stable operation of the filter component.

[0036] The spray rack 14 rotates driven by the rotating shaft 21. Since the upper end of the connecting column 12 is inserted into the positioning hole on the lower end face of the spray rack 14, the rotation of the spray rack 14 will drive the connecting rack 20 to rotate, and further enable the horizontal cleaning roller 11 connected to the connecting rack 20 to obtain the rotation power. The transmission gear 19 on the horizontal cleaning roller 11 meshes with the planetary end face gear rack 10 installed in the installation ring groove 9. When the horizontal cleaning roller 11 rotates with the spray rack 14, the transmission gear 19 rolls on the planetary end face gear rack 10. At the same time, the horizontal cleaning roller 11 is slidably connected to the sliding ring groove on the inner wall of the installation ring groove 9 through the sliding seat, which enables the horizontal cleaning roller 11 to rotate around its own axis and at the same time make a circular motion along the sliding ring groove. During this compound motion process, the horizontal cleaning roller 11 cleans the surface of the filter rack 8 and brushes off the attached dust and impurities.

[0037] One end of the horizontal cleaning roller 11 away from the transmission gear 19 is connected to the vertical cleaning roller 13 through a universal joint. When the horizontal cleaning roller 11 moves, the motion is transmitted to the vertical cleaning roller 13 through the universal joint. Moreover, the limit seat 25 at the upper end of the vertical cleaning roller 13 is slidably connected to the limit ring groove 26 on the lower end face of the liquid guide seat 18. The liquid guide seat 18 rotates with the rotating shaft 21, and the limit ring groove 26 plays a role in restraining and guiding the limit seat 25. Therefore, the vertical cleaning roller 13 rotates around its own axis and at the same time makes a circular motion around the rotating shaft 21, thereby cleaning the surface of the filter assembly and preventing the filter assembly from being blocked.

[0038] Embodiment III

[0039] On the basis of Embodiment II, referring to Figure 1 —9, the housing 1 includes an upper housing 102 and a lower housing 101, and a gasket is provided between the upper housing 102 and the lower housing 101 and they are connected by locking screws. The base frame is arranged on the upper housing 102, the air outlet pipe 7 is arranged on the upper housing 102, the liquid outlet pipe 6 is arranged on the lower housing 101, and the lower part of the lower housing 101 is inclined at a certain angle to ensure that the liquid can be efficiently and smoothly discharged through the liquid outlet pipe 6 by the action of gravity. A limit card slot 23 is provided on the outer side wall of the central shaft 17, and the limit card slot 23 communicates with the upper end face of the central shaft 17. A circular groove is opened on the lower end face of the rotating shaft 21, and the upper part of the central shaft 17 is located in the circular groove. A limit card strip 27 is provided on the inner side wall of the circular groove, and the limit card strip 27 is clamped in the limit card slot 23, so that the rotating shaft 21 can drive the central shaft 17 to rotate synchronously during the rotation process, and at the same time, the radial and axial displacements between the rotating shaft 21 and the central shaft 17 are restricted, improving the stability and reliability of the rotation.

[0040] A limit ring groove 26 is opened on the lower end face of the liquid guide seat 18, a limit seat 25 is slidably connected in the limit ring groove 26, and the upper end of the vertical cleaning roller 13 is inserted into the limit seat 25.

[0041] During the installation process, insert the central shaft 17 into the circular groove of the rotating shaft 21, align the limit clamping strip 27 with the limit clamping groove 23, and then gently press the rotating shaft 21 to enable the limit clamping strip 27 to be smoothly clamped into the limit clamping groove 23. During the operation of the device, due to the cooperation between the limit clamping strip 27 and the limit clamping groove 23, the rotation of the rotating shaft 21 can be accurately transmitted to the central shaft 17, thereby driving components such as the impeller 16 and the spray rack 14 to work normally. In addition, for the convenience of maintenance and component replacement, when it is necessary to disassemble the rotating shaft 21, only a certain axial pulling force needs to be applied to disengage the limit clamping strip 27 from the limit clamping groove 23, and then the rotating shaft 21 can be removed from the central shaft 17. This connection structure not only ensures the normal operation of the device but also improves the convenience of maintenance. By removing the locking screw, the upper housing 102 can be separated from the lower housing 101, and after separation, the filter assembly can be cleaned or replaced more precisely.

[0042] Through the above improvements, the air filtration device for plastic processing in Embodiment 3 has been significantly improved in terms of sealing performance, stability, and maintenance convenience, and can better meet the air filtration requirements during the plastic processing process.

Claims

1. An air filter device for plastic processing, comprising a housing, characterized in that: An air outlet pipe and a liquid outlet pipe are connected to the shell, a mounting cylinder is provided in the middle of the lower end of the shell, the mounting cylinder is connected to an air inlet pipe, the lower end of the mounting cylinder is connected to a discharge pipe, a central axis is installed on the inner wall of the mounting cylinder through a fixed frame, an impeller is provided on the central axis, a filter assembly is placed on the upper end of the mounting cylinder, a rotating shaft is installed on the inner top wall of the shell, and the rotating shaft is connected to the central shaft, a spray rack is installed on the rotating shaft, a liquid pump is provided above the shell, the liquid outlet end of the liquid pump is connected to the spray rack through a connecting elbow, a filter rack is installed between the mounting cylinder and the shell, a cleaning assembly is installed between the spray rack and the shell, and the cleaning assembly cleans the filter rack and the filter assembly at the same time, and the filter assembly is located above the filter rack.

2. The air filter device for plastic processing according to claim 1, characterized in that: The cleaning assembly includes a planetary end face gear frame, an installation ring groove is provided on the inner side wall of the shell, and the planetary end face gear frame is arranged in the installation ring groove, a sliding ring groove is provided on the inner wall of the installation ring groove, a sliding seat is slidably connected in the sliding ring groove, a horizontal cleaning roller is provided on the sliding seat, and the horizontal cleaning roller cleans the surface of the filter frame, a connecting frame is provided on the horizontal cleaning roller, a connecting column is provided on the upper end surface of the connecting frame, a positioning hole is provided on the lower end surface of the spray frame, and the upper end of the connecting column is inserted into the positioning hole, a transmission gear is installed on the horizontal cleaning roller, and the transmission gear is meshed with the planetary end face gear frame, and the end of the horizontal cleaning roller away from the transmission gear is connected to a vertical cleaning roller through a universal joint, and the vertical cleaning roller cleans the surface of the filter assembly.

3. The air filter device for plastic processing according to claim 2, characterized in that: The outer surface of the rotating shaft is provided with a liquid guiding seat, and the liquid guiding seat is located above the filter assembly, and the upper part of the vertical cleaning roller is connected to the liquid guiding seat.

4. The air filter device for plastic processing according to claim 1, characterized in that: A limit slot is provided on the outer wall of the central axis, a circular slot is provided on the lower end surface of the rotating shaft, and the upper part of the central axis is located in the circular slot, a limit strip is provided on the inner wall of the circular slot, and the limit strip is clamped in the limit slot.

5. The air filter device for plastic processing according to claim 1, characterized in that: The connecting elbow is located inside the rotating shaft and connected to the inside of the spray rack. The spray rack includes a spray disc, and the spray disc is installed outside the rotating shaft and connected to the connecting elbow. The outside of the spray disc is connected to a spray support, and the bottom of the spray support is connected to a spray head.

6. The air filter device for plastic processing according to claim 1, characterized in that: The filter assembly comprises an inner filter sleeve, a middle filter sleeve and an outer filter sleeve in sequence from the inside to the outside.

7. The air filter device for plastic processing according to claim 5, characterized in that: The shell comprises an upper shell and a lower shell, and a sealing gasket is arranged between the upper shell and the lower shell and connected by locking screws, the air outlet pipe is arranged on the upper shell, the liquid outlet pipe is arranged on the lower shell, and the lower part of the lower shell is arranged obliquely.

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