A filtration device

Abstract

This application discloses a filtration device belonging to the field of filtration. It includes an inlet pipe, an outlet pipe, and a filtration unit. A valve is installed on the inlet pipe. The filtration unit includes a connecting pipe and a filter plate disposed within the connecting pipe. Both ends of the connecting pipe are connected to the inlet pipe and the outlet pipe, respectively. The end of the outlet pipe furthest from the filtration unit is used to fill a finished product tank with nitrogen. Multiple air holes for gas flow are provided at both ends of the filter plate. A filter chamber is provided within the filter plate, containing a filter medium for absorbing water. A detector for detecting the moisture content of the gas is installed near the outlet pipe end within the connecting pipe. The filtration device also includes a control console for receiving the detector signal. The control console contains an alarm system and a control system for controlling the valve's opening and closing. The filtration device also includes a replacement mechanism for changing the filter medium. This application has the effect of reducing the moisture content in nitrogen and improving the purity of nitrogen.

Description

Technical Field

[0001] This application relates to the field of filtration technology, and in particular to a filtration device. Background Technology

[0002] Nitrogen, as an important inert gas, is widely used in many industries, especially in the food production field. It is used to delay food oxidation and microbial growth, extend shelf life, and plays an indispensable role in food preservation. It can effectively prevent oxidation reactions, improve product quality, and extend product shelf life.

[0003] However, nitrogen is easily contaminated with moisture during preparation, storage, or transportation. This moisture reacts with trace amounts of oxygen in the nitrogen to form acidic substances, which corrode pipes and equipment and reduce food shelf life. One existing method for filtering water from nitrogen is condensation. While condensation can remove some moisture, it is difficult to completely remove tiny water vapor particles, and it is also costly, contributing to high production costs. Utility Model Content

[0004] In order to reduce the moisture content in nitrogen and improve the purity of nitrogen, this application provides a filtration device.

[0005] The filtration device provided in this application adopts the following technical solution: A filtration device includes an inlet pipe, an outlet pipe, and a filter element. The inlet pipe is equipped with a valve. The filter element includes a connecting pipe and a filter plate disposed within the connecting pipe. Both ends of the connecting pipe are connected to the inlet pipe and the outlet pipe, respectively. The end of the outlet pipe furthest from the filter element is used to fill a finished product tank with nitrogen. Multiple air holes for gas flow are provided at both ends of the filter plate. A filter chamber is provided within the filter plate, containing a filter medium for absorbing water. A detector for detecting the moisture content of the gas is disposed within the connecting pipe near the outlet pipe. The filter device also includes a control console for receiving signals from the detector. The control console contains an alarm system and a control system for controlling the opening and closing of the valve. The filter device also includes a replacement mechanism for changing the filter medium.

[0006] By adopting the above technical solution, nitrogen enters the inner wall of the filter device from the inlet pipe, absorbs moisture through the filter medium in the filter chamber, and the dried gas enters the outlet pipe through the detector. When the detector transmits the detected gas moisture content data to the control console, the control console compares the received data with the set parameters in real time. If the moisture content exceeds the standard, the control console closes the valve through the control system and notifies the staff to replace the filter medium through the alarm system.

[0007] Preferably, the inner wall of the filter device is provided with a hydrophobic coating.

[0008] By adopting the above technical solution, the inner wall is coated with a hydrophobic coating, such as polytetrafluoroethylene, to prevent moisture from adhering.

[0009] Preferably, the connecting pipe has an inlet and an outlet respectively provided on its peripheral sidewall. Both the inlet and the outlet are connected to the filter chamber. The inlet and the outlet are provided with arc-shaped grooves relative to their inner walls. The replacement mechanism includes two arc-shaped plates that are slidably connected in the two arc-shaped grooves. The replacement mechanism also includes two sets of driving components that drive the two arc-shaped plates to move and two sets of sealing components that seal the inlet and the outlet respectively.

[0010] By adopting the above technical solution, when the operator replaces the filter media, the operator opens the arc plate at the output port using the drive component, allowing the saturated filter media in the filter chamber to be discharged from the output port. After the saturated filter media in the filter chamber is cleaned, the operator closes the output port by moving the arc plate at the output port under the action of the drive component, and opens the input port by moving the arc plate at the input port to pour in new filter media. Subsequently, the arc plate at the input port is closed. When the valve is opened and gas is introduced, the airtightness of the connecting pipe is improved by the sealing component, reducing the possibility of leakage.

[0011] Preferably, the driving assembly includes a first spring, an arc-shaped telescopic rod, and a pull rod. The two ends of the arc-shaped telescopic rod are respectively fixedly connected to the arc-shaped plate and the inner wall of the arc-shaped groove. The first spring is sleeved on the arc-shaped telescopic rod, and its two ends are respectively fixedly connected to the arc-shaped plate and the inner wall of the arc-shaped groove. The pull rod is connected to the arc-shaped plate, and a slide rail for sliding the pull rod is provided on the side wall of the connecting pipe.

[0012] By adopting the above technical solution, the arc plate is compressed and moved into the arc groove by pulling the rod until the inlet or outlet is fully opened. The arc telescopic rod guides the deformation direction of the spring.

[0013] Preferably, a support rod is fixedly connected to the arc plate, a first pulley is provided on the support rod, two micro motors are fixedly installed on the side wall of the connecting pipe, the control console controls the micro motors, the two micro motors are connected to the two pull rods respectively through two drive ropes, the drive ropes pass around the first pulley, and the drive ropes are connected to one end of the pull rods under the action of the first pulleys and extend along the direction of the pull rods.

[0014] By adopting the above technical solution, the staff can control the start of the micro motor through the console. The start of the micro motor causes the drive rope to retract and move in the direction of the micro motor. The movement of the drive rope pulls the lever, thereby causing the arc plate to move and opening the input or output port.

[0015] Preferably, the sealing assembly includes a slider and a rubber pad. A groove is formed on the side wall of the arc-shaped plate near the filter plate. The slider slides in the groove. The rubber pad is fixedly connected to the slider and abuts against the inlet. A plurality of second springs are provided in the groove. The two ends of the second springs are fixedly connected to the slider and the inner wall of the groove. The pull rod passes through and slides in the groove. The end of the pull rod away from the drive rope is fixedly connected to the end of the slider away from the rubber pad.

[0016] By adopting the above technical solution, when the drive rope is pulled, when the drive rope starts to drive the arc plate to move, the drive rope pulls the pull rod under the action of the first pulley, which drives the slider to move. The movement of the slider drives the rubber pad to move into the groove, thereby avoiding the rubber pad from obstructing the movement of the arc plate. When the pull rod moves to the same height as the first pulley under the pull of the drive rope, the direction of the pull force of the drive rope on the pull rod changes. At this time, the pull rod drives the arc plate to move under the action of the drive rope.

[0017] Preferably, a cleaning plate is rotatably disposed inside the filter chamber, a rotating rod is rotatably disposed at the axis position of the filter chamber, the cleaning plate is fixedly connected to the rotating rod, the end of the cleaning plate away from the rotating rod is slidably connected to the inner wall of the filter chamber, and a rotating assembly for driving the cleaning plate to rotate is disposed inside the connecting pipe.

[0018] By adopting the above technical solution, after the arc plate at the outlet is opened, the cleaning plate in the filter chamber rotates under the action of the rotating component, thereby pushing the saturated filter medium in the filter chamber to the outlet for discharge, which not only improves the discharge efficiency but also makes the arrangement thorough.

[0019] Preferably, the rotating assembly includes a magnetic ring, a rotating ring, and a rotating rod. The magnetic ring is rotatably sleeved on the outer wall of the connecting pipe. A rotating groove is formed on the inner wall of the connecting pipe. The rotating ring rotates within the rotating groove. The rotating rod passes through the side wall of the filter plate and extends to the center of the rotating ring. The two ends of the rotating rod are respectively fixedly connected to the rotating rod and the inner wall of the rotating ring. The rotating ring rotates with the magnetic ring under the action of magnetic force. A turbine is fixedly sleeved on the outer wall of the magnetic ring. A vortex is rotatably mounted on the control console. The vortex meshes with the vortex.

[0020] By adopting the above technical solution, when the console opens the output port through the micro motor, the console starts the worm gear to rotate. The rotation of the worm gear drives the turbine to rotate, the turbine drives the magnetic ring to rotate, the magnetic ring drives the rotating ring inside the connecting pipe to rotate, the rotating ring drives the rotating rod to rotate, the rotating rod drives the rotating rod to rotate, and the rotating rod drives the cleaning plate to rotate.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. Nitrogen gas enters the inner wall of the filter device through the inlet pipe, and absorbs moisture through the filter medium in the filter chamber. The dried gas enters the outlet pipe through the detector. When the detector transmits the detected gas moisture content data to the control console, the control console compares the received data with the set parameters in real time. If the moisture content exceeds the standard, the control console closes the valve through the control system and notifies the staff to replace the filter medium through the alarm system. 2. When the drive rope is pulled, when the drive rope starts to drive the arc plate to move, the drive rope pulls the pull rod under the action of the first pulley, which drives the slider to move. The slider moves and drives the rubber pad to move into the groove, thereby avoiding the rubber pad from obstructing the movement of the arc plate. When the pull rod moves to the same height as the first pulley under the pull of the drive rope, the direction of the pull force of the drive rope on the pull rod changes. At this time, the pull rod drives the arc plate to move under the action of the drive rope. 3. After the arc-shaped plate at the outlet is opened, the cleaning plate in the filter chamber rotates under the action of the rotating component, thereby pushing the saturated filter medium in the filter chamber to the outlet for discharge, which not only improves the discharge efficiency but also makes the arrangement thorough. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a filtration device.

[0023] Figure 2 This is a side cross-sectional view of the filtering device according to an embodiment of this application.

[0024] Figure 3 This is a cross-sectional structural diagram of the filtering device according to an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of the prominent sealing component in this embodiment.

[0026] Explanation of reference numerals in the attached figures: 1. Inlet pipe; 2. Outlet pipe; 3. Filter device; 4. Valve; 5. Filter plate; 6. Connecting pipe; 7. Air hole; 8. Filter chamber; 9. Detector; 10. Control console; 11. Replacement mechanism; 12. Input port; 13. Output port; 14. Arc groove; 15. Arc plate; 16. Drive assembly; 17. Sealing assembly; 18. First spring; 19. Arc telescopic rod; 20. Pull rod; 21. Slide rail; 22. Support rod; 23. First pulley; 24. Micro motor; 25. Slider; 26. Rubber pad; 27. Slide groove; 28. Second spring; 29. ​​Cleaning plate; 30. Rotating rod; 31. Rotating assembly; 32. Magnetic ring; 33. Rotating ring; 34. Rotating rod; 35. Rotating groove; 36. Turbine; 37. Worm rod; 38. Drive rope; 39. Drive motor; 40. Sleeve; 41. Sealing gasket. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0028] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0029] This application discloses a filtering device 3, such as... Figure 1 and Figure 2 As shown, a filtration device 3 includes an inlet pipe 1, an outlet pipe 2, and a filtration unit 3. The filtration unit 3 includes a connecting pipe 6 and a filter plate 5 disposed within the connecting pipe 6. The two ends of the connecting pipe 6 are sealed and connected to the inlet pipe 1 and the outlet pipe 2, respectively. Nitrogen gas enters the filtration unit 3 through the inlet pipe, is dried by the filtration unit 3, and then flows into the next stage through the outlet pipe 2. A valve 4 for controlling the gas flow is installed on the inlet pipe 1, and a control panel 10 for adjusting the valve 4 is installed on the filtration unit 3.

[0030] like Figure 2 As shown, the filter plate 5 has a circular cross-section. The peripheral wall of the filter plate 5 is integrally connected to the inner wall of the connecting pipe 6. A filter chamber 8 for placing the filter medium is provided inside the filter plate 5. Multiple air holes 7 for gas flow are provided on both ends of the filter plate 5. The air holes 7 are arranged in a horizontal direction. A detector 9 for detecting the moisture content in the gas is provided at the rear end of the connecting pipe 6. The detector 9 is connected to the control console 10. The inner wall of the filter device 3 is coated with a hydrophobic coating, such as polytetrafluoroethylene, to prevent moisture from adhering and corroding the structure. The filter device 3 adopts a corrosion-resistant structure. The filter device 3 also has a replacement mechanism 11 for replacing the filter medium.

[0031] like Figure 1 and Figure 2As shown, nitrogen enters the inner wall of the filter device 3 through the inlet pipe 1, and absorbs moisture through the filter medium in the filter chamber 8. The dried gas then enters the outlet pipe 2 through the detector 9. When the detector 9 transmits the detected gas moisture content data to the control console 10, the control console 10 compares the real-time received data with the set parameters. The control console 10 is also equipped with an alarm system. If the moisture content exceeds the standard, the control console 10 closes the valve 4 through the control system and notifies the staff to replace the filter medium through the alarm system.

[0032] like Figure 2 As shown, the connecting pipe 6 has an inlet 12 and an outlet 13 on its surrounding sidewalls. Both inlet 12 and outlet 13 are connected to the filter chamber 8. Saturated filter media is output from outlet 13, and new filter media is delivered into the filter chamber 8 from inlet 12. Both inlet 12 and outlet 13 are equipped with arc-shaped plates 15 to control their opening and closing. A rotating rod 30 is rotatably mounted on the axis of the filter chamber 8. A cleaning plate 29 is fixedly welded to the rotating rod 30. Except for the end connected to the rotating rod 30, the other end face of the cleaning plate 29 is slidably connected to the inner wall of the filter chamber 8. A rotating assembly 31 is provided inside the connecting pipe 6 to drive the cleaning plate 29 to rotate. When the saturated filter media in the filter chamber 8 is output, the cleaning plate 29 rotates under the action of the rotating assembly 31, thereby enabling the filter media in the filter chamber 8 to be discharged from outlet 13 more quickly and thoroughly.

[0033] like Figure 1 and 2 As shown, the rotating assembly 31 includes a magnetic ring 32, a rotating ring 33, and a rotating rod 34. A rotating groove 35 is formed on the inner wall of the connecting pipe 6 at the right end of the filter plate 5. The rotating groove 35 is located at the end of the filter plate 5 furthest from the inlet pipe. The rotating ring 33 is magnetic and can be made of a material that does not affect nitrogen gas, or a metal material with an anti-corrosion treatment. The rotating ring 33 rotates on the inner wall of the rotating groove 35, while the magnetic ring 32 is rotated and fitted onto the outer wall of the connecting pipe 6. The positions of the magnetic ring 32 and the rotating ring 33 coincide. When the magnetic ring 32 is rotated, the rotating ring 33 rotates synchronously with it under the action of magnetic force. The rotating rod 30 extends through the side wall of the filter plate 5 and reaches the center of the rotating ring 33. The rotating rod 34 is located at the radius of the rotating ring 33, and its two ends are fixedly welded to the inner wall of the rotating rod 30 and the rotating ring 33, respectively. The detector 9 is fixedly installed on the rotating rod 34 and is used to detect the water content of the filtered gas. A turbine 36 is fixedly sleeved on the outer wall of the magnetic ring 32. A support plate is fixedly welded to the side wall of the control console 10. A drive motor 39 is fixedly installed on the support plate. A vortex rod 37 is rotatably installed on the support plate. The drive motor 39 is connected to the vortex rod 37. The control console 10 controls the drive motor 39, and the vortex rod 37 meshes with the vortex rod 37. The control console 10 controls the rotation of the vortex rod 37.

[0034] like Figure 2As shown, when the output port 13 is opened, the control console 10 starts the worm gear 37 to rotate. The rotation of the worm gear 37 drives the turbine 36 to rotate. The rotation of the turbine 36 drives the magnetic ring 32 to rotate. The rotation of the magnetic ring 32 drives the rotating ring 33 inside the connecting pipe 6 to rotate. The rotation of the rotating ring 33 drives the rotating rod 34 to rotate. The rotation of the rotating rod 34 drives the rotating rod 30 to rotate. The rotation of the rotating rod 30 drives the cleaning plate 29 to rotate, thereby pushing the saturated filter media in the filter chamber 8 to the output port 13 for discharge. This not only improves the discharge efficiency but also makes the arrangement thorough.

[0035] like Figure 2 and Figure 3 As shown, both the input port 12 and the output port 13 have arc-shaped grooves 14 on their inner walls for sliding of the arc-shaped plates 15. The replacement mechanism 11 also includes two sets of drive assemblies 16 that drive the two arc-shaped plates 15 to move respectively, and two sets of sealing assemblies 17 that seal the input port 12 and the output port 13 respectively. The input port 12 and the output port 13 have the same structure. This embodiment uses the output port 13 as an example to illustrate the structural configuration.

[0036] like Figure 3 As shown, the drive assembly 16 includes a first spring 18, an arc-shaped telescopic rod 19, and a pull rod 20. The two ends of the arc-shaped telescopic rod 19 are respectively fixedly welded to the inner walls of the arc-shaped plate 15 and the arc-shaped groove 14. The first spring 18 is sleeved on the arc-shaped telescopic rod 19, and its two ends are respectively fixedly welded to the inner walls of the arc-shaped plate 15 and the arc-shaped groove 14. The pull rod 20 is vertically connected to the arc-shaped plate 15. A sealing gasket 41 is provided at the end of the arc-shaped groove 14 away from the first spring 18, and the arc-shaped plate 15 is pressed against the sealing gasket 41 under the action of the first spring 18.

[0037] like Figure 4 As shown, the sealing assembly 17 includes a slider 25 and a rubber pad 26. A groove 27 is formed on the side wall of the arc-shaped plate 15 near the inner cavity of the connecting pipe 6. The slider 25 slides vertically within the groove 27. The rubber pad 26 is fixedly connected to the outer end face of the slider 25, and the slider 25 and the rubber pad 26 are integrally formed. Multiple second springs 28 are vertically arranged within the groove 27, with both ends of the second springs 28 fixedly welded to the side wall of the slider 25 and the inner wall of the groove 27. When the arc-shaped plate 15 covers the output port 13, the slider 25 is pushed outward from the groove 27 by the action of the second springs 28, causing the rubber pad 26 to press against the input port 12, thereby sealing the filter chamber 8 and reducing the possibility of gas leakage.

[0038] like Figure 1 and 4As shown, a slide rail 21 is provided on the side wall of the connecting pipe 6 for the pull rod 20 to slide. The pull rod 20 passes through the groove 27 perpendicular to the arc plate 15 and slides within the slide rail 27. The bottom of the pull rod 20 is fixedly welded to the slider 25. A support rod 22 is also fixedly welded to the arc plate 15. A first pulley 23 is rotatably mounted on the top of the support rod 22, and the support rod 22 slides within the slide rail 21. A micro motor 24 is fixedly installed on the side wall of the connecting pipe 6. The micro motor 24 is controlled by the control console 10. A sleeve 40 is fixedly sleeved on the shaft of the micro motor 24. A drive rope 38 is wound around the sleeve 40. The end of the drive rope 38 away from the sleeve 40 is fixedly connected to the top of the pull rod 20. The drive rope 38 is wound around the first pulley 23.

[0039] like Figure 3 As shown, when it is necessary to open the output port 13, the operator controls the micro motor 24 to start via the control console 10. When the micro motor 24 starts, it pulls the drive rope 38 to move. Under the action of the first pulley 23, the drive rope 38 pulls the pull rod 20 along its extension direction, causing the slider 25 to compress the second spring 28 and move. The slider 25 moves into the slide groove 27, causing the rubber pad 26 to slide into the slide groove 27. At this time, the top of the pull rod 20 is flush with the first pulley 23. The first pulley 23 cannot change the direction of the pull force of the drive rope 38. The drive rope 38 continues to contract, thereby pulling the pull rod 20 to move along the extension direction of the drive rope 38. The movement of the pull rod 20 causes the arc plate 15 to move into the arc groove 14 to compress the first spring 18 until the output port 13 is fully opened. The micro motor 24 stops and fixes the position of the drive rope 38, making it convenient to discharge the saturated filter medium from the output port 13. When it is necessary to close the output port 13, the control console 10 drives the micro motor 24 to reverse, the drive rope 38 is slowly released, and the arc plate 15 gradually closes the output port 13 under the push of the first spring 18. The arc telescopic rod 19 can reduce the possibility of the first spring 18 bending and being damaged, and plays a guiding role in the direction of the first elastic deformation. When the arc plate 15 abuts against the sealing gasket 41 on the arc groove 14 and completely covers the output port 13, the pull rod 20 can move with the slider 25 under the tension released by the drive rope 38. The slider 25, under the action of the second spring 28, makes the rubber pad 26 press against the output port 13.

[0040] The implementation principle of this application embodiment is as follows: Nitrogen gas enters the inner wall of the filter device 3 from the inlet pipe 1, and absorbs moisture through the filter medium in the filter chamber 8. The dried gas enters the outlet pipe 2 through the detector 9. When the detector 9 transmits the detected gas moisture content data to the control console 10, the control console 10 compares the real-time received data with the set parameters. If the moisture content exceeds the standard, the control console 10 closes the valve 4 through the control system and notifies the staff to replace the filter medium through the alarm system.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A filter device, characterized by: It includes an inlet pipe (1), an outlet pipe (2), and a filter device (3). The inlet pipe (1) is equipped with a valve (4). The filter device (3) includes a connecting pipe (6) and a filter plate (5) disposed in the connecting pipe (6). The two ends of the connecting pipe (6) are respectively connected to the inlet pipe (1) and the outlet pipe (2). The end of the outlet pipe (2) away from the filter device (3) is used to fill the finished product tank with nitrogen. Both ends of the filter plate (5) are provided with multiple air holes (7) for gas flow. The filter plate (5) is provided with a filter chamber (8). The filter chamber (8) is provided with a filter medium for absorbing water. The connecting pipe (6) is equipped with a detector (9) for detecting the water content of the gas near the end of the outlet pipe (2). The filter device (3) also includes a control console (10) for receiving the signal from the detector (9). The control console (10) contains an alarm system and a control system for controlling the opening and closing of the valve (4). The filter device (3) also has a replacement mechanism (11) for replacing the filter medium.

2. A filter device according to claim 1, characterised in that: The inner wall of the filter device (3) is provided with a hydrophobic coating.

3. The filter device of claim 1, wherein: The connecting pipe (6) has an inlet (12) and an outlet (13) on its peripheral sidewall. Both the inlet (12) and the outlet (13) are connected to the filter chamber (8). The inlet (12) and the outlet (13) are provided with arc-shaped grooves (14) relative to the inner wall. The replacement mechanism (11) includes two arc-shaped plates (15), which are slidably connected in the two arc-shaped grooves (14). The replacement mechanism (11) also includes two sets of driving components (16) for driving the two arc-shaped plates (15) to move respectively and two sets of sealing components (17) for sealing the inlet (12) and the outlet (13) respectively.

4. A filter device according to claim 3, characterised in that: The drive assembly (16) includes a first spring (18), an arc-shaped telescopic rod (19), and a pull rod (20). The two ends of the arc-shaped telescopic rod (19) are fixedly connected to the inner wall of the arc-shaped plate (15) and the arc-shaped groove (14), respectively. The first spring (18) is sleeved on the arc-shaped telescopic rod (19), and its two ends are fixedly connected to the inner wall of the arc-shaped plate (15) and the arc-shaped groove (14), respectively. The pull rod (20) is connected to the arc-shaped plate (15), and a slide rail (21) is provided on the side wall of the connecting pipe (6) for the pull rod (20) to slide.

5. A filtration device according to claim 4, characterized in that: A support rod (22) is fixedly connected to the arc plate (15). A first pulley (23) is provided on the support rod (22). Two micro motors (24) are fixedly installed on the side wall of the connecting pipe (6). The control console (10) controls the micro motors (24). The two micro motors (24) are connected to the two pull rods (20) respectively through two drive ropes (38). The drive ropes (38) pass around the first pulley (23). Under the action of the first pulley (23), the drive ropes (38) are connected to one end of the pull rod (20) and extend along the direction of the pull rod (20).

6. A filter device according to claim 5, characterised in that: The sealing assembly (17) includes a slider (25) and a rubber pad (26). The arc plate (15) has a groove (27) on one side wall near the filter plate (5). The slider (25) slides in the groove (27). The rubber pad (26) is fixedly connected to the slider (25) and abuts against the inlet (12). A plurality of second springs (28) are provided in the groove (27). The two ends of the second springs (28) are fixedly connected to the slider (25) and the inner wall of the groove (27). The pull rod (20) passes through and slides in the groove (27). The end of the pull rod (20) away from the drive rope (38) is fixedly connected to the end of the slider (25) away from the rubber pad (26).

7. The filter device of claim 1, wherein: A cleaning plate (29) is rotatably disposed inside the filter chamber (8), and a rotating rod (30) is rotatably disposed at the axis position of the filter chamber (8). The cleaning plate (29) is fixedly connected to the rotating rod (30), and the end of the cleaning plate (29) away from the rotating rod (30) is slidably connected to the inner wall of the filter chamber (8). A rotating assembly (31) for driving the cleaning plate (29) to rotate is disposed inside the connecting pipe (6).

8. A filter device according to claim 7, characterised in that: The rotating assembly (31) includes a magnetic ring (32), a rotating ring (33), and a rotating rod (34). The magnetic ring (32) is rotatably sleeved on the outer wall of the connecting pipe (6). A rotating groove (35) is opened on the inner wall of the connecting pipe (6). The rotating ring (33) rotates in the rotating groove (35). The rotating rod (30) passes through the side wall of the filter plate (5) and extends to the center of the rotating ring (33). The two ends of the rotating rod (34) are fixedly connected to the rotating rod (30) and the inner wall of the rotating ring (33), respectively. The rotating ring (33) rotates with the magnetic ring (32) under the action of magnetic force. A turbine (36) is fixedly sleeved on the outer wall of the magnetic ring (32). A worm gear (37) is rotatably arranged on the control console (10). The worm gear (37) meshes with the worm gear (38).

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