A new filtering device

Abstract

This application discloses a novel filtration device, belonging to the field of material filtration technology. The key technical features include a housing, a first filter assembly, and a second filter assembly. The housing has an inlet port and multiple flow channels communicating with them. Inside the housing is a movable cavity communicating with the flow channels. The first and second filter assemblies are located within the movable cavity, selectively isolating the inlet and outlet ends of the flow channels. The housing has a working position and a maintenance position. The first and second filter assemblies are respectively connected to a first drive assembly and a second drive assembly, allowing switching between the working and maintenance positions. At most one component can be in the maintenance position, achieving maintenance of the filter assemblies without shutting down the system, thus improving filtration efficiency.

Description

Technical Field

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

[0002] PET extrusion foaming is an emerging composite material processing technology. Its product, PET foam board, has many technical advantages, such as environmental protection, noise reduction, flame retardancy, heat insulation, light weight, and high performance. It can replace traditional metal materials and be used in various fields, such as wind power, shipping, aerospace, and high-speed rail.

[0003] The main raw material for PET foam boards is PET chips, which are currently divided into two types. One type is PET bottle-grade chips (mainly derived from petroleum), but the cost is high and it consumes petroleum resources. The other type comes from recycled PET granules, mainly from recycled PET bottles (beverage bottles), which are obtained through crushing, washing, and granulation. This type is lower in cost and more environmentally friendly.

[0004] With increasingly stringent environmental protection requirements, the proportion of PET recycled granules used as raw materials is increasing year by year. However, since they are recycled, PET bottle flakes contain many impurities, such as PP, PVC, glass, metal, and stone. Using them in foaming production lines can cause frequent clogging of the extruder outlet filter, resulting in poor PET foam board structure, increased waste, and the need to stop production to replace the filter after clogging, thus affecting production efficiency. Utility Model Content

[0005] In order to maintain the filter components without shutting down the system and improve filtration efficiency, this utility model provides a novel filtration device.

[0006] The novel filtration device provided by this utility model adopts the following technical solution: A novel filtration device includes a housing, a first filter assembly, and a second filter assembly. The housing has an inlet and multiple flow channels communicating with the inlet. The housing contains a movable cavity communicating with the flow channels. Both the first and second filter assemblies are located within the movable cavity, selectively isolating the inlet and outlet ends of the flow channels. The housing has a working station and a maintenance station. The first filter assembly is connected to a first drive assembly for switching between the working station and the maintenance station. The second filter assembly is connected to a second drive assembly for switching between the working station and the maintenance station. At most one of the first and second filter assemblies is located at the maintenance station.

[0007] By adopting the above technical solution, multiple flow channels are connected to the input port and the moving chamber is connected to the flow channels. The first filter component and the second filter component can selectively isolate the inlet and outlet ends of the flow channels to achieve multi-channel filtration function. A working station and a maintenance station are set up, and the first drive component drives the first filter component and the second drive component drives the second filter component to switch between the working station and the maintenance station. At most one of the first filter component and the second filter component is located in the maintenance station, so that the filter device can be maintained without stopping the machine, ensuring the continuous operation of the filtration work.

[0008] Preferably, the first filter assembly includes a first filter disc and a first filter screen. The first filter disc is connected to the first drive assembly. The first filter disc has a plurality of first through holes. When the first through holes are connected to the flow channel, they are used to allow PET to pass through. The first filter screen is connected to the first filter disc and is located at the outlet end of the first through holes to filter PET passing through the first through holes.

[0009] By adopting the above technical solution, the filtration device can use the flow channel to transport PET to the first through hole of the first filter plate, and the first filter screen filters the PET that has passed through the first through hole, thereby realizing the filtration function of PET.

[0010] Preferably, the first drive assembly includes a first hydraulic cylinder, a first linkage rod, and a first support plate. The first hydraulic cylinder is connected to the outer wall of the housing, and the drive shaft of the first hydraulic cylinder extends into the housing. One end of the first linkage rod is connected to the drive shaft of the first hydraulic cylinder, and the other end is connected to the first support plate. The first support plate is slidably connected to the housing. The first filter disc passes through the first support plate and is connected to the first support plate. The first support plate is provided with a first filtration station and a first sealing station. The first filter disc is located at the first filtration station. When the first filtration station coincides with the working station, the first filter screen filters the PET in the flow channel. When the first filtration station coincides with the maintenance station and the first sealing station coincides with the working station, the first support plate blocks the flow channel.

[0011] By adopting the above technical solution, the first hydraulic cylinder can drive the first linkage rod, which in turn drives the first support plate to slide, thereby realizing the switching of the first filter assembly between the working position and the maintenance position. It can filter the PET in the flow channel at the working position, and at the maintenance position, the flow channel can be blocked by the first support plate, which facilitates the maintenance of the first filter assembly and does not affect the normal operation of the device.

[0012] Preferably, the second filter assembly includes a second filter disc and a second filter screen. The second filter disc is connected to the second drive assembly. The second filter disc has a plurality of second through holes. When the second through holes are connected to the flow channel, they are used to allow PET to pass through. The second filter screen is connected to the second filter disc and is located at the outlet end of the second through holes to filter the PET passing through the second through holes.

[0013] By adopting the above technical solution, PET can pass through the second through hole on the second filter disc, and with the second filter screen located at the outlet end of the second through hole, the PET passing through the second through hole can be filtered, which can effectively improve the filtration effect. Furthermore, the position of the second filter disc can be flexibly controlled by the second drive component to perform the filtration operation.

[0014] Preferably, the second drive assembly includes a second hydraulic cylinder, a second linkage rod, and a second support plate. The second hydraulic cylinder is connected to the outer wall of the housing, and its drive shaft extends into the housing. One end of the second linkage rod is connected to the drive shaft of the second hydraulic cylinder, and the other end is connected to the second support plate. The second support plate is slidably connected to the housing. The second filter disc passes through and is connected to the second support plate. The second support plate is provided with a second filtration station and a second sealing station. The second filter disc is located at the second filtration station. When the second filtration station coincides with the working station, the second filter screen filters the PET in the flow channel. When the second filtration station coincides with the maintenance station and the second sealing station coincides with the working station, the second support plate blocks the flow channel.

[0015] By adopting the above technical solution, the second filter disc can be flexibly driven to switch between the working position and the maintenance position using the drive structure composed of the second hydraulic cylinder, the second linkage rod and the second support plate, so as to realize the function of filtering PET in the flow channel and isolating the flow channel, and ensure the stable operation of the filtration device under different working conditions.

[0016] Preferably, maintenance stations are provided on both sides of the working station, with the first filtration station and the second filtration station extending to different maintenance stations.

[0017] By adopting the above technical solution, the maintenance stations on both sides of the working station allow the first and second filtration stations to extend to different maintenance stations respectively. This makes it more flexible for the first and second filtration components to switch between the working station and different maintenance stations. It also facilitates the maintenance of the filtration components located at the maintenance station without affecting the normal operation of the other side's filtration components, and avoids the simultaneous maintenance of two filtration components affecting the overall operation of the filtration device.

[0018] Preferably, the inner peripheral walls of the first filter disc and the second filter disc are provided with first grooves, and the first filter screen and the second filter screen are engaged in their respective first grooves.

[0019] By adopting the above technical solution, the installation and disassembly of the first and second filter screens can be facilitated, making filter screen replacement and maintenance easier. At the same time, the filter screens can be securely installed on the filter disc to ensure the filtration effect.

[0020] Preferably, a second groove is provided on the outer peripheral wall of both the first filter plate and the second filter plate, and the first support plate and the second support plate are engaged with their respective second grooves.

[0021] By adopting the above technical solution, the connection between the first filter disc and the first support plate, the second filter disc and the second support plate is made more stable, ensuring that the relative position between the filter disc and the support plate is stable during the operation of the filtration device, thereby ensuring the normal operation of the filtration work.

[0022] Preferably, the housing is further connected to a control component, which includes a detector and a controller. The detector is connected to the inner wall of the housing and is used to monitor the filter clogging. The controller is connected to the outer wall of the housing and is used to receive signals and control the hydraulic cylinder.

[0023] By adopting the above technical solution, the filter screen clogging status can be monitored in real time, and the hydraulic cylinder can be automatically controlled according to the monitoring results to realize the switching of the filter components between the working position and the maintenance position, thereby improving the efficiency and automation of the filter device.

[0024] In summary, this utility model has the following beneficial effects: 1. Multiple flow channels are connected to the input port, and the movable chamber is connected to the flow channels. The first and second filter components can be selectively isolated at the inlet and outlet ends of the flow channels to achieve multi-channel filtration. A working station and a maintenance station are provided. The first drive component drives the first filter component, and the second drive component drives the second filter component to switch between the working station and the maintenance station. At most one of the first and second filter components can be located at the maintenance station, so that the filter device can be maintained without stopping the machine, ensuring continuous filtration and improving production efficiency. 2. The first filter screen and the second filter screen are respectively located at the outlet end of the first through hole and the second through hole. They can filter the PET passing through the through hole, remove impurities in the PET, avoid impurities causing frequent clogging of the extruder outlet filter device, and reduce the generation of poor PET foam board structure and waste. 3. The detector in the control component can monitor the filter screen blockage. The controller receives the signal and controls the hydraulic cylinder to facilitate timely treatment of the blocked filter screen. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a new type of filtration device.

[0026] Figure 2 This is a schematic diagram of the structure of the first and second filter components. Figure 3 This is a schematic diagram of the internal structure of the casing.

[0027] Figure 4 This is a schematic diagram of the structure of the first filter disc.

[0028] Figure 5 This is a schematic diagram of the structure of the first drive component and the second drive component.

[0029] Figure 6 This is a schematic diagram of the baffle structure.

[0030] Explanation of reference numerals in the attached figures: 1. Housing; 11. Input port; 12. Movable cavity; 13. Working station; 14. Maintenance station; 2. Flow channel; 3. First filter assembly; 31. First filter disc; 311. First through hole; 32. First filter screen; 4. First drive assembly; 41. First support plate; 411. First filtration station; 412. First sealing station; 43. First hydraulic cylinder; 42. First linkage rod; 5. Second filter assembly; 51. Second filter disc; 511. Second through hole; 52. Second filter screen; 6. Second drive assembly; 61. Second support plate; 611. Second filtration station; 612. Second sealing station; 62. Second hydraulic cylinder; 63. Second linkage rod; 7. First groove; 8. Second groove; 9. Baffle. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0032] In the description of the embodiments of this application, the words "for example" or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design that is described as "for example" or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Rather, the use of the words "for example" or "for instance" is intended to present the relevant concepts in a specific manner.

[0033] In the description of the embodiments of this application, the term "multiple" means two or more. For example, multiple systems means two or more systems, and multiple screen terminals means two or more screen terminals. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0034] A novel filtration device, referring to Figure 1 , Figure 2 and Figure 3 The system includes a housing 1, a first filter assembly 3, a first drive assembly 4, a second filter assembly 5, and a second drive assembly 6. The housing 1 has an input port 11 and multiple flow channels 2. The input port 11 is used for PET input, and the multiple flow channels 2 are all connected to the input port 11, allowing the input PET to be distributed into each flow channel 2. The housing 1 has a movable cavity 12, which is connected to the multiple flow channels 2. The first filter assembly 3 and the second filter assembly 5 are both disposed within the movable cavity 12, each corresponding to a flow channel 2, and their respective inlet and outlet ends can be selectively isolated. The housing 1 has a working station 13 and a maintenance station 14. The first drive assembly 4 can drive the first filter assembly 3 to switch between the working station 13 and the maintenance station 14, and the second drive assembly 6 can drive the second filter assembly 5 to switch between the working station 13 and the maintenance station 14. At most one of the first filter assembly 3 and the second filter assembly 5 can be located in the maintenance station 14.

[0035] The inlet and outlet ends of the flow channel 2 can be selectively isolated by the first filter component 3 and the second filter component 5, and at most either one can be located at the maintenance station 14. This allows the filter components to be maintained without stopping the machine, thus avoiding the impact on production efficiency due to the need to replace the filter screen during machine shutdown.

[0036] Reference Figure 2 In this embodiment, two flow channels 2 are provided, corresponding one-to-one with the first filter component 3 and the second filter component 5. The width of the flow channel 2 gradually increases from one end near the inlet to the other end. The first filter component 3 and the second filter component 5 are distributed vertically.

[0037] Reference Figure 2 and Figure 4The first filter assembly 3 includes a first filter disc 31 and a first filter screen 32. The first filter disc 31 is connected to the first drive assembly 4. The first filter disc 31 includes a passage portion and a connecting portion. The passage portion is cylindrical, and the connecting portion is annular, with its inner wall fixedly connected to the passage portion. The passage portion of the first filter disc 31 has multiple first through holes 311. When the first through holes 311 communicate with the flow channel 2, they are used to allow PET to pass through. The inner wall of the connecting portion has a first groove 7. The first filter screen 32 is engaged in the first groove 7, and the second filter screen 52 has two layers for filtering the PET output from the first through holes 311.

[0038] The filtration device can use the flow channel 2 to transport PET to the first through hole 311 of the first filter plate 31, and the first filter screen 32 filters the PET that has passed through the first through hole 311 to achieve the filtration function of PET.

[0039] Reference Figure 3 and Figure 5 The first drive assembly 4 includes a first hydraulic cylinder 43, a first linkage rod 42, and a first support plate 41. The first hydraulic cylinder 43 is fixedly connected to the outer wall of the housing 1, and the drive shaft of the first hydraulic cylinder 43 extends into the interior of the housing 1. One end of the first linkage rod 42 is fixedly connected to the drive shaft of the first hydraulic cylinder 43, and the other end is fixedly connected to the first support plate 41. The first support plate 41 is slidably connected to the housing 1.

[0040] Reference Figure 2 and Figure 5 The first filter disc 31 passes through the first support plate 41. A second groove 8 is formed on the outer peripheral wall of the first filter disc 31. The first support plate 41 engages with the second groove 8 to achieve the connection between the two. The first support plate 41 is provided with a first filtration station 411 and a first sealing station 412. The first filter disc 31 is located at the first filtration station 411. When the first filtration station 411 coincides with the working station 13, the first filter screen 32 filters the PET in the flow channel 2. When the first filtration station 411 coincides with the maintenance station 14 and the first sealing station 412 coincides with the working station 13, the first support plate 41 blocks the flow channel 2.

[0041] The first hydraulic cylinder 43 can drive the first linkage rod 42, which in turn drives the first support plate 41 to slide, thereby enabling the first filter assembly 3 to switch between the working station 13 and the maintenance station 14. It can filter the PET in the flow channel 2 in the working station 13, and can also block the flow channel 2 through the first support plate 41 in the maintenance station 14, which facilitates the maintenance of the first filter assembly 3 without affecting the normal operation of the device.

[0042] Reference Figure 2The second filter assembly 5 includes a second filter disc 51 and a second filter screen 52. The second filter disc 51 is connected to the second drive assembly 6. The structure of the second filter disc 51 is the same as that of the first filter disc 31. The second filter disc 51 has multiple second through holes 511, which are connected to the flow channel 2 to allow PET to pass through. The inner wall of the second filter disc 51 also has a first groove 7, in which the second filter screen 52 is fitted. The second filter screen 52 has two layers to filter the PET output from the second through holes 511.

[0043] By using the second through hole 511 on the second filter plate 51 to allow PET to pass through, and in conjunction with the second filter screen 52 located at the outlet end of the second through hole 511, the PET passing through the second through hole 511 can be filtered, which can effectively improve the filtration effect.

[0044] Reference Figure 2 and Figure 5 The second drive assembly 6 includes a second hydraulic cylinder 62, a second linkage rod 63, and a second support plate 61. The second hydraulic cylinder 62 is fixedly connected to the outer wall of the housing 1. The drive shaft of the second hydraulic cylinder 62 extends into the housing 1. One end of the second linkage rod 63 is fixedly connected to the drive shaft of the second hydraulic cylinder 62, and the other end is fixedly connected to the second support plate 61. The second support plate 61 is slidably connected to the housing 1.

[0045] Reference Figure 2 and Figure 5 The second filter disc 51 passes through the second support plate 61, and a second groove 8 is also provided on the outer peripheral wall of the second filter disc 51. The second support plate 61 is engaged with the second groove 8 to achieve the connection between the two. The second support plate 61 is provided with a second filtration station 611 and a second sealing station 612. The second filter disc 51 is located at the second filtration station 611. When the second filtration station 611 coincides with the working station 13, the second filter screen 52 filters the PET in the flow channel 2. When the second filtration station 611 coincides with the maintenance station 14 and the second sealing station 612 coincides with the working station 13, the second support plate 61 blocks the flow channel 2.

[0046] Start the second hydraulic cylinder 62, which drives the second linkage rod 63 to move. The second linkage rod 63 drives the second support plate 61 to move, so that the second filtration station 611 is in the working station 13, or the second filtration station 611 is in the maintenance station 14 and the second sealing station 612 is in the working station 13.

[0047] Reference Figure 2It also includes control components. The control components include a detector and a controller. The detector is fixedly connected to the inner wall of the flow channel 2 and is used to monitor the filter screen clogging status. The controller is fixedly connected to the outer wall of the housing 1 and is used to receive signals and control the hydraulic cylinder's movement. The detector can be a pressure sensor, which determines whether the filter screen is clogged by detecting pressure changes within the flow channel 2. The controller can be a PLC controller, which has good stability and reliability.

[0048] The control unit can monitor the filter screen blockage and control the hydraulic cylinder, enabling maintenance of the filter components without stopping the machine, ensuring continuous production and improving production efficiency.

[0049] During operation, both the first filter assembly 3 and the second filter assembly 5 are located at the working station 13. PET enters from the inlet 11 and is dispersed into the various flow channels 2. It then passes through the first through-hole 311 on the first filter disc 31, and is filtered by the first filter screen 32 before continuing to flow; alternatively, it passes through the second through-hole 511 on the second filter disc 51, and is filtered by the second filter screen 52 before continuing to flow. When the detector detects that the first filter screen 32 is clogged, the controller controls the first drive assembly 4 to switch the first filter assembly 3 to the maintenance station 14 for cleaning or replacement of the first filter screen 32. Simultaneously, the second filter assembly 5 remains at the working station 13 to ensure continuous production. When the detector detects that the second filter screen 52 is clogged, the second filter assembly 5 switches to the maintenance station 14, while the first filter assembly 3 remains at the working station 13.

[0050] Reference Figure 6 The maintenance station 14 of the housing 1 can be equipped with a baffle 9, which covers the maintenance station 14 and is fixedly connected to the housing 1 by bolts. The baffle 9 is fixedly connected with a handle.

[0051] The operating principle of this application is as follows: By setting a first filter component 3 and a second filter component 5, and enabling them to switch between the working station 13 and the maintenance station 14, with at most one of the first filter component 3 and the second filter component 5 located at the maintenance station 14, the problem of frequent shutdowns for filter replacement due to filter clogging is avoided, thus improving production efficiency. Simultaneously, the control component can monitor the filter clogging status in real time and perform timely switching operations, ensuring the normal operation of the filter device. Compared with the prior art, the filter device of this embodiment can better adapt to the production needs of using recycled PET granules as raw materials, reducing the scrap rate and improving production stability and environmental friendliness.

[0052] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A novel filtration device characterized by: The device includes a housing (1), a first filter assembly (3), and a second filter assembly (5). The housing (1) has an input hole (11) and multiple flow channels (2). The multiple flow channels (2) are all connected to the input hole (11). The housing (1) has a movable cavity (12) inside, which is connected to the flow channels (2). The first filter assembly (3) and the second filter assembly (5) are both located in the movable cavity (12). The first filter assembly (3) and the second filter assembly (5) are used to selectively isolate the inlet end and the outlet end of the flow channels (2). The housing (1) is provided with a working station (13) and a maintenance station (14). The first filter component (3) is connected to a first drive component (4) for driving the first filter component (3) to switch between the working station (13) and the maintenance station (14). The second filter component (5) is connected to a second drive component (6) for driving the second filter component (5) to switch between the working station (13) and the maintenance station (14). At most one of the first filter component (3) and the second filter component (5) is located in the maintenance station (14).

2. A novel filtration device as claimed in claim 1, wherein: The first filter assembly (3) includes a first filter disc (31) and a first filter screen (32). The first filter disc (31) is connected to the first drive assembly (4). The first filter disc (31) has a plurality of first through holes (311). When the first through holes (311) are connected to the flow channel (2), they are used to allow PET to pass through. The first filter screen (32) is connected to the first filter disc (31) and is located at the outlet end of the first through holes (311) to filter the PET that passes through the first through holes (311).

3. A novel filtration device as claimed in claim 2, wherein: The first drive assembly (4) includes a first hydraulic cylinder (43), a first linkage rod (42), and a first support plate (41). The first hydraulic cylinder (43) is connected to the outer wall of the housing (1), and the drive shaft of the first hydraulic cylinder (43) extends into the housing (1). One end of the first linkage rod (42) is connected to the drive shaft of the first hydraulic cylinder (43), and the other end is connected to the first support plate (41). The first support plate (41) is slidably connected to the housing (1). The first filter disc (31) passes through the first support plate (41) and is connected to the first support plate (41). 41) Connection, the first support plate (41) is provided with a first filtration station (411) and a first sealing station (412), the first filter plate (31) is located at the first filtration station (411), when the first filtration station (411) coincides with the working station (13), the first filter screen (32) filters the PET in the flow channel (2); when the first filtration station (411) coincides with the maintenance station (14) and the first sealing station (412) coincides with the working station (13), the first support plate (41) blocks the flow channel (2).

4. A novel filtration device as claimed in claim 3, wherein: The second filter assembly (5) includes a second filter disc (51) and a second filter screen (52). The second filter disc (51) is connected to the second drive assembly (6). The second filter disc (51) has a plurality of second through holes (511). When the second through holes (511) are connected to the flow channel (2), they are used to allow PET to pass through. The second filter screen (52) is connected to the second filter disc (51) and is located at the outlet end of the second through holes (511) to filter the PET that passes through the second through holes (511).

5. A novel filtration device according to claim 4, characterized in that: The second drive assembly (6) includes a second hydraulic cylinder (62), a second linkage rod (63), and a second support plate (61). The second hydraulic cylinder (62) is connected to the outer wall of the housing (1), and the drive shaft of the second hydraulic cylinder (62) extends into the housing (1). One end of the second linkage rod (63) is connected to the drive shaft of the second hydraulic cylinder (62), and the other end is connected to the second support plate (61). The second support plate (61) is slidably connected to the housing (1). The second filter disc (51) passes through the second support plate (61) and is connected to the second support plate (61). 61) Connection, the second support plate (61) is provided with a second filtration station (611) and a second sealing station (612), the second filter plate (51) is located at the second filtration station (611), when the second filtration station (611) coincides with the working station (13), the second filter screen (52) filters the PET in the flow channel (2); when the second filtration station (611) coincides with the maintenance station (14) and the second sealing station (612) coincides with the working station (13), the second support plate (61) blocks the flow channel (2).

6. A novel filtration device as claimed in claim 5, wherein: Maintenance stations (14) are provided on both sides of the work station (13), and the first filtration station (411) and the second filtration station (611) extend to different maintenance stations (14).

7. A novel filtration device as claimed in claim 4, wherein: The inner peripheral walls of the first filter disc (31) and the second filter disc (51) are provided with first grooves (7), and the first filter screen (32) and the second filter screen (52) are engaged in their respective first grooves (7).

8. A novel filtration device as claimed in claim 5, wherein: The first filter plate (31) and the second filter plate (51) are provided with second grooves (8) on their outer peripheral walls, and the first support plate (41) and the second support plate (61) are engaged with their respective second grooves (8).

9. A novel filtration device according to claim 1, characterized in that: The housing (1) is also connected to a control component, which includes a detector and a controller. The detector is connected to the inner wall of the housing (1) to monitor the filter blockage, and the controller is connected to the outer wall of the housing (1) to receive signals and control the hydraulic cylinder.

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