Closed pressurized purging filter

Abstract

The utility model discloses a closed pressurized purging filter which comprises a filter body, the side wall of the filter body is communicated with a feed pipe, the bottom of the filter body is provided with a drain outlet, and the top of the filter body is fixedly connected with a sealing cover. The utility model relates to the technical field of filters, in particular to a closed pressurized purging filter, which realizes the rotation of a filter screen through the matching of a first servo motor, a first gear, a second gear and a connecting seat, enlarges the blowback range of a nozzle, and solves the problem that in the actual use process, the filter screen cannot rotate. Even if a plurality of air nozzles are arranged on a traditional closed pressurized purging filter, cleaning dead angles can still exist when a filter screen in the closed pressurized purging filter is subjected to back-blowing cleaning operation, so that some impurities can still remain on the filter screen, and in subsequent use, the cleaning dead angles cannot be cleaned. And the filtering effect of the closed pressurized purging filter can be influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a closed pressurized purging filter. Background Technique

[0002] A filter is an indispensable device on a pipeline for transporting a medium, and is used for screening, filtering or separating the medium.

[0003] When a traditional closed pressurized purging filter is in use, gas is blown back to the surface of the filter screen through a jet nozzle inside the filter, and the impurities attached to the surface of the filter screen are blown off to achieve the purpose of cleaning the filter screen.

[0004] However, in the actual use process, even if multiple jet nozzles are provided on the traditional closed pressurized purging filter, there may still be cleaning dead corners during the back-blowing cleaning operation of the filter screen inside the closed pressurized purging filter, resulting in some impurities remaining on the filter screen. In subsequent use, it may affect the filtering effect of the closed pressurized purging filter. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a closed pressurized purging filter, which solves the problem that in the actual use process, even if multiple jet nozzles are provided on the traditional closed pressurized purging filter, there may still be cleaning dead corners during the back-blowing cleaning operation of the filter screen inside the closed pressurized purging filter, resulting in some impurities remaining on the filter screen, and in subsequent use, it may affect the filtering effect of the closed pressurized purging filter.

[0006] To achieve the above object, the utility model is realized through the following technical solutions: A closed pressurized purging filter includes a filter body. A feed pipe is communicated with the side wall of the filter body. A sewage discharge port is opened at the bottom of the filter body. A sealing cover is fixedly connected to the top of the filter body. A controller is fixedly connected to the top of the sealing cover. A booster pump is fixedly connected to one side of the top of the sealing cover close to the back of the controller. A filter screen is arranged inside the filter body. The closed pressurized purging filter further includes a rotating device, which is arranged on the top of the sealing cover and located between the controller and the booster pump; a cleaning device is arranged on the outer wall of the filter screen; a transmission device is installed on the top of the cleaning device; wherein, the filter screen is rotated by the rotating device, the surface of the filter screen is cleaned by the cleaning device, and the cleaning device is assisted to move by the transmission device.

[0007] Preferably, the output end of the booster pump is communicated with a backflush pipe. The outer wall of the backflush pipe is fixedly connected with a first support plate. The bottom of the first support plate is fixedly connected to the top of the sealing cover. The backflush pipe penetrates through the top of the sealing cover and is rotatably connected to the top of the filter net through a sealing bearing and extends into the filter net. A plurality of nozzles are arranged inside the filter net. The plurality of nozzles are all communicated with the outer wall of the backflush pipe. The bottom of the filter net is communicated with a discharge pipe. The discharge pipe penetrates through the bottom of the sewage outlet and extends to the outside of the filter body. The outer wall of the discharge pipe is fixedly connected with a second support plate. The top of the second support plate is fixedly connected to the bottom of the filter body. The outer wall of the filter body is fixedly connected with a support frame.

[0008] Preferably, the rotating device includes a first servo motor. The first servo motor is fixedly connected to one side of the top of the sealing cover close to the backflush pipe through a motor base; a first gear is fixedly connected to the output end of the first servo motor; a second gear is meshed and connected to the outer wall of the first gear; a connecting seat is sleeved on the outer wall of the backflush pipe, and the upper side of the side wall is fixedly connected to the inner wall of the second gear. The lower side of the side wall is rotatably connected to the inner wall of the sealing cover through a sealing bearing and extends into the filter body, and the bottom is fixedly connected to the top of the filter net; wherein, the first servo motor drives the first gear to rotate, and through the cooperation of the first gear, the second gear and the connecting seat, the filter net rotates.

[0009] Preferably, the cleaning device includes a second servo motor. The second servo motor is arranged on the outer wall of the first servo motor away from the backflush pipe and is fixedly connected to the top of the sealing cover through a motor base; there are two threaded rods. One side of the threaded rod is fixedly connected to the output end of the second servo motor, and the outer walls of the threaded rods on both sides are rotatably connected to the inner wall of the sealing cover through a sealing bearing and extend into the filter body; a connecting ring is internally threaded on the outer walls of the two threaded rods on both sides of its inner wall respectively; a scraping plate is fixedly connected to the outer wall of the connecting ring, and the side away from the connecting ring on the outer wall is attached to the inner wall of the filter body; a cleaning brush is installed on the inner wall of the connecting ring, and the side away from the connecting ring on the outer wall is attached to the surface of the filter net; wherein, the second servo motor drives the threaded rod to rotate, and through the cooperation of the threaded rod, the connecting ring, the scraping plate and the cleaning brush, the inner wall of the filter body and the surface of the filter net are respectively cleaned.

[0010] Preferably, the transmission device includes belt pulleys. There are two belt pulleys, which are respectively located on both sides of the top of the sealing cover, and the inner wall is fixedly connected to the outer wall of the threaded rod; a belt is attached to the outer walls of the two belt pulleys and is sleeved on the outer walls of the first gear and the second gear; wherein, through the cooperation of the two belt pulleys and the belt, the two threaded rods rotate synchronously.

[0011] Preferably, a pressure gauge is communicated with one side of the top of the sealing cover close to the back of the controller and away from the first servo motor. Pressure sensors are fixedly connected to both sides of the bottom of the sealing cover. Beneficial effects

[0012] The utility model provides a closed pressurized purging filter, which has the following beneficial effects: through the cooperation of the first servo motor, the first gear, the second gear and the connecting seat, the filter screen is rotated, the backwashing range of the nozzle is expanded, and the problem that in the actual use process, even if a plurality of jet nozzles of the traditional closed pressurized purging filter are provided, there may still be cleaning dead corners when backwashing and cleaning the filter screen inside the closed pressurized purging filter, resulting in some impurities remaining on the filter screen, which may affect the filtering effect of the closed pressurized purging filter in subsequent use is solved.

[0013] Through the cooperation of the second servo motor, the threaded rod, the connecting ring, the scraping plate and the cleaning brush, the inner wall of the filter body and the surface of the filter screen are cleaned simultaneously, and the problem that in the traditional closed pressurized purging filter during the backwashing operation, the impurities blown off from the surface of the filter screen may adhere to the inner wall of the filter body, and after a period of filtering work, these impurities may reattach to the surface of the filter screen, so that the cleaned filter screen still cannot reach the ideal filtering effect is solved. Brief description of the drawings

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a schematic external view of the utility model;

[0016] Figure 3 is Figure 1 a schematic structural diagram of the first servo motor, the first gear and the second gear in

[0017] Figure 4 is Figure 1 a schematic structural diagram of the sealing cover, the backwashing pipe and the filter screen in

[0018] Figure 5 is Figure 2 a schematic structural diagram of the threaded rod, the connecting ring and the scraping plate in

[0019] In the figure: 1. Filter body; 11. Feed pipe; 12. Drain port; 13. Support frame; 2. Sealing cover; 21. Controller; 22. Booster pump; 23. Pressure gauge; 24. Pressure sensor; 3. Backflush pipe; 31. First support plate; 32. Filter screen; 321. Discharge pipe; 3211. Second support plate; 33. Nozzle; 4. Rotating device; 41. First servo motor; 42. First gear; 43. Second gear; 44. Connecting seat; 5. Cleaning device; 51. Second servo motor; 52. Threaded rod; 53. Connecting ring; 54. Scraper; 55. Cleaning brush; 6. Transmission device; 61. Pulley; 62. Belt. Detailed implementation mode

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] During the actual use process, even if multiple jet nozzles are provided in the traditional closed pressurized purge filter, there may still be cleaning dead corners when performing backflush cleaning operations on the internal filter screen of the closed pressurized purge filter, resulting in some impurities remaining on the filter screen. In subsequent use, it may affect the filtering effect of the closed pressurized purge filter.

[0022] In view of this, the present invention provides a closed pressurized purge filter, which solves the problem that during the actual use process, even if multiple jet nozzles are provided in the traditional closed pressurized purge filter, there may still be cleaning dead corners when performing backflush cleaning operations on the internal filter screen of the closed pressurized purge filter, resulting in some impurities remaining on the filter screen, and in subsequent use, it may affect the filtering effect of the closed pressurized purge filter.

[0023] Through the personnel in this field, the components in this case are connected in sequence. For the specific connection and operation sequence, reference should be made to the following working principle. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process.

[0024] Embodiment 1: Consisting of Figures 1-5It can be known that a closed pressurized purging filter includes a filter body 1. A feed pipe 11 is connected to the side wall of the filter body 1. A sewage discharge port 12 is provided at the bottom of the filter body 1. A sealing cover 2 is fixedly connected to the top of the filter body 1. A controller 21 is fixedly connected to the top of the sealing cover 2. A booster pump 22 is fixedly connected to one side of the top of the sealing cover 2 close to the back of the controller 21. A filter screen 32 is arranged inside the filter body 1. The closed pressurized purging filter further includes a rotating device 4, a cleaning device 5 and a transmission device 6. The rotating device 4 is arranged on the top of the sealing cover 2 and is located between the controller 21 and the booster pump 22; the cleaning device 5 is arranged on the outer wall of the filter screen 32; the transmission device 6 is installed on the top of the cleaning device 5; wherein, the filter screen 32 is rotated by the rotating device 4, the surface of the filter screen 32 is cleaned by the cleaning device 5, and the movement of the cleaning device 5 is assisted by the transmission device 6;

[0025] In the specific implementation process, it is particularly worth noting that the filter body 1 is generally cylindrical in shape, with a conical bottom, which is convenient for discharging impurities from the inside of the filter body 1. In terms of material selection, the filter body 1 can be made of high-strength and corrosion-resistant stainless steel material, which can not only withstand a certain pressure but also effectively resist the erosion of various corrosive materials, extending the service life of the equipment. At the same time, the inside of the body is polished to reduce material residue and improve the filtering effect. The feed pipe 11 on its side wall is connected to an external feeding device, and a leak-proof cover is provided at the bottom of the sewage outlet 12 at the bottom, which is fixed by screws. When sewage discharge is required, the leak-proof cover is opened to discharge the impurities to an external collection device, and its material can be selected as stainless steel. The sealing cover 2 is generally circular plate-shaped, with a relatively large circular through-hole opened at the center and two smaller-diameter circular through-holes opened on both sides respectively. In the connection part between the sealing cover 2 and the filter body 1, a double-sealing design is adopted. A rubber sealing ring is used on the inner layer to ensure good sealing performance, and the outer layer is fastened by bolts to further enhance the reliability of the connection, preventing material leakage and pressure loss. Its material can also be selected as stainless steel. The model of the controller 21 can be selected according to actual needs as long as it meets the working requirements. For example, it can be of the SINAMICS-S120 model. The model of the booster pump 22 can also be selected according to actual needs. For example, it can be of the STD100 model. Its output pressure is proportional to and adjustable with the driving pressure, and it can flexibly adjust the output pressure according to the clogging situation of the filter net 32 and the requirements of the filtering process to ensure the backwashing effect. To ensure the stable operation of the booster pump 22, a gas filter can be installed at the pump body inlet to prevent impurities from entering the pump and affecting the performance and service life of the pump. The filter net 32 is generally cylindrical in shape, and its material can be selected as stainless steel. A circular plate is provided at the top, which is convenient for fixing with the components on its top by screws and can prevent gas leakage. When in use, the outside of it is the unfiltered medium, and the medium reaches its inside through the filter net 32, thus realizing the filtering operation. Through the cooperation of the controller 21 and the booster pump 22, the staff can achieve the intermittent multi-pressure technology inside the filter body 1, perform intermittent multi-backwashing on the filter net 32, remove the impurities attached to its surface, improve the service life of the filter net 32, and save the maintenance cost;

[0026] Further, the output end of the booster pump 22 is communicated with a backflush pipe 3. The outer wall of the backflush pipe 3 is fixedly connected with a first support plate 31. The bottom of the first support plate 31 is fixedly connected to the top of the sealing cover 2. The backflush pipe 3 penetrates through the top of the sealing cover 2 and is rotatably connected to the top of the filter screen 32 through a sealing bearing and extends into the filter screen 32. A plurality of nozzles 33 are arranged inside the filter screen 32. The plurality of nozzles 33 are all communicated with the outer wall of the backflush pipe 3. The bottom of the filter screen 32 is communicated with a discharge pipe 321. The discharge pipe 321 penetrates through the bottom of the sewage discharge port 12 and extends to the outside of the filter body 1. The outer wall of the discharge pipe 321 is fixedly connected with a second support plate 3211. The top of the second support plate 3211 is fixedly connected to the bottom of the filter body 1. The outer wall of the filter body 1 is fixedly connected with a support frame 13;

[0027] In the specific implementation process, it is particularly worth pointing out that the backflush pipe 3 is integrally in a '7' shape, and its material can be selected as stainless steel. The top is communicated with the output end of the booster pump 22. Three nozzles 33 are communicated with the outer wall of the backflush pipe 3 on the front, back, left and right sides of the outer wall extending into the filter body 1. The nozzles 33 can be selected as stainless steel. It adopts a new structure of an eight-shaped horn, which can instantaneously pressurize and realizes the improvement of the backflush effect of the closed pressurized purging filter. The first support plate 31 plays a role in supporting and limiting the backflush pipe 3. The discharge pipe 321 is integrally in an 'L' shape, and a flange is arranged at the end, which is convenient for connecting with an external collection device. The second support plate 3211 plays a role in supporting and limiting the discharge pipe 321. The support frame 13 plays a role in supporting the entire closed pressurized purging filter, realizing the improvement of the structural stability of the closed pressurized purging filter;

[0028] Further, the rotating device 4 includes a first servo motor 41, a first gear 42, a second gear 43 and a connecting seat 44. The first servo motor 41 is fixedly connected to one side of the top of the sealing cover 2 close to the backflush pipe 3 through a motor seat; the first gear 42 is fixedly connected to the output end of the first servo motor 41; the second gear 43 is meshed with the outer wall of the first gear 42; the connecting seat 44 is sleeved on the outer wall of the backflush pipe 3, and the upper side of the side wall is fixedly connected to the inner wall of the second gear 43, and the lower side of the side wall is rotatably connected to the inner wall of the sealing cover 2 through a sealing bearing and extends into the filter body 1, and the bottom is fixedly connected to the top of the filter screen 32; wherein, the first servo motor 41 drives the first gear 42 to rotate, and through the cooperation of the first gear 42, the second gear 43 and the connecting seat 44, the filter screen 32 rotates;

[0029] In the specific implementation process, it is particularly worth noting that the model of the first servo motor 41 can be selected according to actual needs. For example, it can be of the model 1FK7032-5AF71-1SG0, which can be used in conjunction with the controller SINAMICS-S120. The specific connection method is as follows: In terms of power connection, connect the PM240-2 power module to the three-phase AC power supply, and connect the output terminal of the power module to the power terminal of the 1FK7032-5AF71-1SG0 motor. In terms of control signal connection, use communication cables such as PROFIBUS and PROFINET to connect the CU320-2 control unit and the PM240-2 power module, and connect the encoder feedback signal of the motor to the CU320-2 control unit through the corresponding encoder cable. In terms of the connection of the enable and alarm signals, connect the enable signal output terminal of the control unit to the input terminal of the power module, and connect the alarm signal output terminal of the power module to the alarm signal input terminal of the control unit. After the connection is completed, the first gear 42 and the second gear 43 are of different sizes. The first gear 42 is smaller, but the teeth and tooth pitches of the first gear 42 and the second gear 43 are exactly the same. The connecting seat 44 is integrally in an 'n' shape, and a through hole with a diameter slightly larger than that of the backflush pipe 3 is provided at its top. A sealing ring is provided between the top of the connecting seat 44 and the backflush pipe 3, and the bottom is fixed to the annular circular plate at the top of the filter screen 32 by two screws to ensure that the internal medium will not leak to the outside of the filter body 1 through the connecting seat 44. The staff starts the first servo motor 41 to drive the first gear 42 to rotate, and through the cooperation of the first gear 42, the second gear 43 and the connecting seat 44, the filter screen 32 is rotated, realizing an increase in the backflush range of the nozzle 33 inside the closed pressurized purge filter;

[0030] Specifically, the unfiltered medium first enters the interior of the filter body 1 through the feed pipe 11, then passes through the outer wall of the filter screen 32 and enters the interior of the filter screen 32, and finally leaves the interior of the filter body 1 through the discharge pipe 321. After the filtering operation is completed, when it is necessary to perform a backflush operation on the surface of the filter screen 32, the staff opens the leak-proof cover at the bottom of the drain port 12 and connects the external power supply of the controller 21. The booster pump 22 is started through the controller 21, and the booster pump 22 discharges the pressurized gas into the backflush pipe 3. These pressurized gases are blown onto the surface of the filter screen 32 through the nozzle 33. At the same time, the staff connects the external power supply of the first servo motor 41 through the controller 21 and starts the first servo motor 41. The first servo motor 41 drives the first gear 42 to rotate, the first gear 42 drives the second gear 43 to rotate, the second gear 43 drives the connecting seat 44 to rotate, the connecting seat 44 drives the filter screen 32 to rotate, and the rotation of the filter screen 32 cooperates with the gas blown out by the nozzle 33 to achieve a full purge of the side wall of the filter screen 32, blowing off the impurities attached to the filter screen 32. These impurities leave the interior of the filter body 1 through the drain port 12.

[0031] Example 2: As Figures 1-5 shown, the cleaning device 5 includes a second servo motor 51, a threaded rod 52, a connecting ring 53, a scraper 54 and a cleaning brush 55. The second servo motor 51 is arranged on one side of the outer wall of the first servo motor 41 away from the backwashing pipe 3, and is fixedly connected to the top of the sealing cover 2 through a motor base; there are two threaded rods 52, one side of the threaded rod 52 is fixedly connected to the output end of the second servo motor 51, and the outer walls of the threaded rods 52 on both sides are rotatably connected to the inner wall of the sealing cover 2 through sealing bearings and extend into the interior of the filter body 1; both sides of the inner wall of the connecting ring 53 are respectively threadedly connected to the outer walls of the two threaded rods 52; the scraper 54 is fixedly connected to the outer wall of the connecting ring 53, and one side of the outer wall away from the connecting ring 53 is attached to the inner wall of the filter body 1; the cleaning brush 55 is installed on the inner wall of the connecting ring 53, and one side of the outer wall away from the connecting ring 53 is attached to the surface of the filter screen 32; wherein, the second servo motor 51 drives the threaded rod 52 to rotate, and through the cooperation of the threaded rod 52, the connecting ring 53, the scraper 54 and the cleaning brush 55, the inner wall of the filter body 1 and the surface of the filter screen 32 are respectively cleaned;

[0032] In the specific implementation process, it is particularly worth noting that the model of the second servo motor 51 can be selected to be the same as that of the first servo motor 41, and the connection method with the controller 21 is also the same as that of the first servo motor 41. Among them, if the terminals of the controller 21 are insufficient, external terminals can be selected for auxiliary connection. There are two threaded rods 52, which are arranged in parallel. The connecting ring 53 is integrally in the shape of an annular plate and is sleeved on the outer wall of the filter screen 32. The material of the connecting ring 53 can be selected as stainless steel. The scraper 54 is integrally in the shape of a circular ring plate and is fixed on the outer ring of the connecting ring 53. Its material can be selected as polytetrafluoroethylene. After long-term use, the scraper 54 can be replaced. The cleaning brush 55 is fixed on the inner ring of the connecting ring 53, and its material can be selected as plastic PP. Through the cooperation of the second servo motor 51, the threaded rod 52, the connecting ring 53, the scraper 54 and the cleaning brush 55, the staff can clean the inner wall of the filter body 1 and the surface of the filter screen 32, realizing the improvement of the service life of the closed pressurized purge filter;

[0033] Furthermore, the transmission device 6 includes a pulley 61 and a belt 62. There are two pulleys 61, which are respectively located on both sides of the top of the sealing cover 2, and the inner wall is fixedly connected to the outer wall of the threaded rod 52; the belt 62 is attached to the outer walls of the two pulleys 61 and is sleeved on the outer walls of the first gear 42 and the second gear 43; wherein, through the cooperation of the two pulleys 61 and the belt 62, the two threaded rods 52 rotate synchronously;

[0034] In the specific implementation process, it is particularly worth noting that two pulley wheels 61 are provided, and the material of the pulley wheels 61 can be selected as plastic. Multiple grooves are provided on the pulley wheels 61. The belt 62 can be selected as rubber. Through the cooperation of the belt 62 and the pulley wheels 61, multiple wedges are provided on the belt 62 to closely cooperate with the grooves of the pulley wheels 61, making the belt 62 more stable during the transmission process, reducing the possibility of slipping, so that the two threaded rods 52 rotate synchronously, ensuring that both sides are balanced when the connecting ring 53 moves, preventing jamming, and the diameter of the pulley wheels 61 is larger than that of the first gear 42 and the second gear 43, ensuring that there is a gap between the first gear 42, the second gear 43 and the belt 62, achieving the improvement of the operation stability of the closed pressurized purge filter;

[0035] It can be understood that in some working environments, the fluid to be filtered may contain impurities that can adhere to the outer wall of the threaded rod 52, affecting the threaded connection between the threaded rod 52 and the connecting ring 53. In this case, the second servo motor 51 and the threaded rod 52 can be replaced with a telescopic rod, such as a telescopic motor or a hydraulic cylinder, which can avoid the adhesion of impurities in the thread of the threaded rod 52 affecting the threaded connection between the threaded rod 52 and the connecting ring 53, ensuring the normal driving of the lifting of the connecting ring 53 and cleaning the inner wall of the filter body 1 and the outer wall of the filter screen 32;

[0036] Furthermore, a pressure gauge 23 is connected to the top of the sealing cover 2 on the side close to the back of the controller 21 and away from the first servo motor 41, and pressure sensors 24 are fixedly connected to both sides of the bottom of the sealing cover 2;

[0037] In the specific implementation process, it is particularly worth noting that the pressure gauge 23 is used to observe the internal pressure of the closed pressurized purge filter. Two pressure sensors 24 are provided. The pressure sensors 24 cooperate with the controller 21 to accurately monitor the internal pressure of the closed pressurized purge filter, monitor whether the effect of multiple pressurizations is achieved, and can also prevent excessive pressure and cause danger, achieving the improvement of the use safety of the closed pressurized purge filter;

[0038] Specifically, after the backwashing operation, impurities during the backwashing process may remain on the inner wall of the filter body 1. When it is necessary to clean the inner wall of the filter body 1, the staff connects the external power supply of the second servo motor 51 through the controller 21 to start the second servo motor 51. The second servo motor 51 drives the threaded rod 52 on one side to rotate. The threaded rod 52 on one side drives the threaded rod 52 on the other side to rotate synchronously through the cooperation of the pulley 61 and the belt 62. The threaded rod 52 drives the connecting ring 53 to move, and the connecting ring 53 drives the scraper 54 and the cleaning brush 55 to move. The scraper 54 and the cleaning brush 55 respectively clean the inner wall of the filter body 1 and the surface of the filter screen 32. The stains cleaned are discharged from the inside of the filter body 1 through the sewage outlet 12. After cleaning, it can also be rinsed with clean water to further improve the cleaning effect.

[0039] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A closed pressurized purge filter, comprising a filter body (1), characterized in that: The side wall of the filter body (1) is connected to a feed pipe (11), the bottom of the filter body (1) is provided with a sewage outlet (12), the top of the filter body (1) is fixedly connected to a sealing cover (2), the top of the sealing cover (2) is fixedly connected to a controller (21), the top of the sealing cover (2) is fixedly connected to a booster pump (22) on one side close to the back of the controller (21), the filter body (1) is provided with a filter screen (32), and the closed pressurized purge filter further comprises: A rotating device (4) is arranged on the top of the sealing cover (2) and is located between the controller (21) and the booster pump (22); A cleaning device (5) is arranged on the outer wall of the filter screen (32); A transmission device (6) is mounted on the top of the cleaning device (5); The filter screen (32) is rotated by the rotating device (4), the surface of the filter screen (32) is cleaned by the cleaning device (5), and the movement of the cleaning device (5) is assisted by the transmission device (6).

2. A closed pressurized purge filter according to claim 1, characterized in that: The output end of the booster pump (22) is connected to a backflush pipe (3); the outer wall of the backflush pipe (3) is fixedly connected to a first support plate (31); the bottom of the first support plate (31) is fixedly connected to the top of the sealing cover (2); the backflush pipe (3) passes through the top of the sealing cover (2) and is rotatably connected to the top of the filter screen (32) through a sealing bearing and extends to the inside of the filter screen (32); a plurality of nozzles (33) are arranged inside the filter screen (32); the plurality of nozzles (33) are connected to the top of the filter screen (32); 3) are both connected to the outer wall of the backblowing pipe (3), the bottom of the filter screen (32) is connected to a discharge pipe (321), the discharge pipe (321) passes through the bottom of the sewage outlet (12) and extends to the outside of the filter body (1), the outer wall of the discharge pipe (321) is fixedly connected to a second support plate (3211), the top of the second support plate (3211) is fixedly connected to the bottom of the filter body (1), and the outer wall of the filter body (1) is fixedly connected to a support frame (13).

3. A closed pressurized purge filter according to claim 2, characterized in that: The rotating device (4) comprises: A first servo motor (41) is fixedly connected to a side of the top of the sealing cover (2) close to the backflush pipe (3) via a motor base; A first gear (42) fixedly connected to an output end of the first servo motor (41); A second gear (43) meshingly connected to an outer wall of the first gear (42); A connecting seat (44) is sleeved on the outer wall of the backflush pipe (3), and the upper part of the side wall is fixedly connected to the inner wall of the second gear (43), and the lower part of the side wall is rotatably connected to the inner wall of the sealing cover (2) through a sealing bearing, and extends to the interior of the filter body (1), and the bottom is fixedly connected to the top of the filter screen (32); The first servo motor (41) drives the first gear (42) to rotate, and the filter screen (32) rotates through the cooperation of the first gear (42), the second gear (43) and the connecting seat (44).

4. A closed pressurized purge filter according to claim 3, characterized in that: The cleaning device (5) comprises: A second servo motor (51) is arranged on a side of the outer wall of the first servo motor (41) away from the backflush tube (3), and is fixedly connected to the top of the sealing cover (2) via a motor seat; Two threaded rods (52) are provided, the threaded rod (52) on one side being fixedly connected to the output end of the second servo motor (51), and the outer walls of the threaded rods (52) on both sides being rotatably connected to the inner wall of the sealing cover (2) via sealing bearings and extending to the interior of the filter body (1); A connecting ring (53), the inner walls of which are respectively threadedly connected to the outer walls of the two threaded rods (52); A scraper (54) is fixedly connected to the outer wall of the connecting ring (53), and a side of the outer wall away from the connecting ring (53) is in contact with the inner wall of the filter body (1); A cleaning brush (55) is mounted on the inner wall of the connecting ring (53), and a side of the outer wall away from the connecting ring (53) is in contact with the surface of the filter screen (32); The second servo motor (51) drives the threaded rod (52) to rotate, and the threaded rod (52), the connecting ring (53), the scraper (54) and the cleaning brush (55) cooperate to clean the inner wall of the filter body (1) and the surface of the filter screen (32).

5. A closed pressurized purge filter according to claim 4, characterized in that: The transmission device (6) comprises: Two pulleys (61) are provided, which are respectively located on both sides of the top of the sealing cover (2), and the inner walls of which are fixedly connected to the outer wall of the threaded rod (52); A belt (62) is attached to the outer walls of the two pulleys (61) and is sleeved on the outer walls of the first gear (42) and the second gear (43); Wherein, the two threaded rods (52) rotate synchronously through the cooperation of the two pulleys (61) and the belt (62).

6. The closed pressurized purge filter according to claim 3, characterized in that: A pressure gauge (23) is connected to a side of the top of the sealing cover (2) close to the back of the controller (21) and away from the first servo motor (41), and pressure sensors (24) are fixedly connected to both sides of the bottom of the sealing cover (2).

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