A filter

Abstract

The utility model provides a filter, set up the upper cover at the top of filter drum, set up filter element clamping plate in filter drum, form upper chamber and lower chamber, and set up liquid outlet on one side of upper chamber, set up blowdown and liquid inlet in lower chamber, and blowdown is located the bottom of lower chamber, liquid inlet is located one side of lower chamber, and set up valve in blowdown, set up filter element as the columnar structure, the lower end is closed end, the outer wall of filter element has seted up a plurality of filter holes, the upper end of filter element is liquid outlet end, a plurality of filter elements are vertically set up in lower chamber, and the upper portion of filter element is fixed in filter element clamping plate, filter element clamping plate sets up first through -hole, the scraping dirty subassembly swing setting is in lower chamber, the lifting mechanism for driving scraping dirty subassembly to go up and down sets up in filter drum, when the outer wall of filter element is too much impurity, can drive scraping dirty subassembly to the outer wall of filter element and scrape off the impurity through the lifting mechanism, and export through blowdown, to guarantee the filtering efficiency of filter.

Description

Technical Field

[0001] This utility model relates to the field of filtration equipment, specifically a filter. Background Technology

[0002] Filters are an indispensable device in pipelines transporting media, and are typically installed on pressure reducing valves, pressure relief valves, and positioning water valves. When a filter is in operation, the media to be treated passes through the filter's cylindrical filter element, where impurities are trapped on the outer wall. However, when there are too many impurities, the cylindrical filter element will gradually become clogged, reducing the filter's filtration efficiency. Therefore, a filter is needed that can clean the outer wall of the cylindrical filter element when it becomes clogged. Utility Model Content

[0003] In view of this, the present invention provides a filter to solve the problem of reduced filter efficiency caused by clogging of the cylindrical filter element.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A filter includes: a filter cartridge, a top cover, a filter element clamping plate, a scraping assembly, a lifting mechanism, a valve, and multiple filter elements;

[0006] The top cover is located at the top of the filter cartridge;

[0007] The filter element clamping plate is set inside the filter cartridge to form an upper chamber and a lower chamber;

[0008] A liquid outlet is provided on one side of the upper chamber;

[0009] The lower chamber is equipped with a drain outlet and a liquid inlet. The drain outlet is located at the bottom of the lower chamber, and the liquid inlet is located on one side of the lower chamber.

[0010] The valve is located at the drain outlet;

[0011] The filter element has a columnar structure with a closed end at the bottom. Multiple filter holes are provided on the outer wall of the filter element, and the upper end of the filter element is the liquid outlet.

[0012] Multiple filter elements are vertically arranged in the lower chamber, and the upper part of the filter elements is fixed to the filter element clamping plate.

[0013] The filter element clamping plate has a first through hole for connecting the upper chamber and the liquid outlet end of the filter element;

[0014] The scraping assembly is located in the lower chamber and is used to scrape off impurities from the outer wall of the filter element;

[0015] The lifting mechanism is located on the filter cartridge and is used to drive the scraping component to rise and fall.

[0016] Preferably, the scraping assembly includes: a fixing plate and a plurality of scraping rings;

[0017] The mounting plate has multiple mounting holes for the filter element to pass through;

[0018] The scraper ring is installed inside the mounting hole.

[0019] Preferably, the scraper ring is made of a deformable material.

[0020] Preferably, the fixing plate includes: a first clamping plate and a second clamping plate disposed below the first clamping plate;

[0021] The first clamping plate has a second through hole for the filter element to pass through, wherein the upper diameter of the second through hole is smaller than the lower diameter of the second through hole, forming a first limiting step for restricting the passage of the scraper ring;

[0022] The second clamping plate has a third through hole for the filter element to pass through, wherein the lower diameter of the second through hole is smaller than the upper diameter of the second through hole, forming a second limiting step for restricting the passage of the scraper ring;

[0023] An installation groove for installing a scraper ring is formed between the first limiting step and the second limiting step.

[0024] Preferably, the lifting mechanism includes: a connecting rod, a connecting member, a sealing assembly, and a telescopic mechanism;

[0025] The telescopic mechanism is located on the top cover;

[0026] One end of the connecting rod is connected to the first clamping plate through a connector, and the other end passes through the filter element clamping plate and the top cover and protrudes to be connected to the extension rod of the telescopic mechanism.

[0027] The sealing assembly is located between the connecting rod and the filter element clamping plate.

[0028] Preferably, the first clamping plate has a third through hole for the connector to pass through;

[0029] The lower end of the connector is provided with an annular limiting member to restrict the connector from passing through the third through hole;

[0030] The upper end of the connector is threaded to the connecting rod.

[0031] Preferably, the fixing plate has multiple drainage holes.

[0032] Preferably, the lifting mechanism includes: a screw and a drive mechanism;

[0033] The screw is rotatably mounted inside the filter cylinder;

[0034] The fixing plate has screw holes that mate with the screw rod;

[0035] The drive mechanism is located on the upper cover and is connected to the upper end of the screw. The drive mechanism is used to drive the screw to rotate.

[0036] Preferably, the filter element clamping plate includes: an upper clamping plate, a lower clamping plate, a sealing element, and multiple clamping columns;

[0037] The lower clamping plate is located below the upper clamping plate;

[0038] The sealing element is located between the upper clamping plate and the lower clamping plate;

[0039] The filter element has an annular protrusion on its circumference at the liquid outlet end;

[0040] The lower clamping plate has a fourth through hole for the filter element to pass through, wherein the upper diameter of the fourth through hole is larger than the lower diameter of the fourth through hole, forming a third limiting step for restricting the passage of the annular protrusion;

[0041] The upper clamping plate has a first through hole corresponding to the fourth through hole, wherein the diameter of the first through hole is smaller than the diameter of the annular protrusion;

[0042] The lower end of the clamping column abuts against the upper clamping plate, and the upper end abuts against the upper cover.

[0043] Preferably, it also includes: a first limit switch and a second limit switch;

[0044] Both the first limit switch and the second limit switch are located in the lower cavity.

[0045] The first limit switch is located at the bottom of the chamber;

[0046] The second limit switch is located on the filter element clamping plate.

[0047] Based on the above, the present invention provides a filter in which an upper cover is disposed on the top of the filter cartridge, a filter element clamping plate is disposed inside the filter cartridge to form an upper chamber and a lower chamber, and an outlet is opened on one side of the upper chamber, and a drain outlet and an inlet are opened in the lower chamber. The drain outlet is located at the bottom of the lower chamber, and the inlet is located on one side of the lower chamber. A valve is disposed at the drain outlet. The filter element is configured as a columnar structure with a closed end at the bottom. Multiple filter holes are opened on the outer wall of the filter element, and the upper end of the filter element is the outlet end. Multiple filter elements are vertically disposed in the lower chamber, and the upper part of the filter element is fixed to the filter element clamping plate. The filter element clamping plate is provided with a first through hole for connecting the upper chamber and the outlet end of the filter element. A scraping component for scraping impurities on the outer wall of the filter element is movably disposed in the lower chamber, and a lifting mechanism for driving the scraping component to rise and fall is disposed in the filter cartridge. With the filter disclosed above, when there are too many impurities on the outer wall of the filter element, the connecting rod can drive the scraping assembly to scrape off the impurities on the outer wall of the filter element and discharge them through the drain port to ensure the filtration efficiency of the filter. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0049] Figure 1 A schematic diagram of the structure of a filter provided in an embodiment of this utility model;

[0050] Figure 2 A schematic diagram of the structure of the fixing plate provided in an embodiment of this utility model.

[0051] The filter element comprises: a filter cartridge 1, an upper chamber 11, an outlet 111, a lower chamber 12, a drain outlet 121, and an inlet 122; an upper cover 2; a filter element clamping plate 3, an upper clamping plate 31, a lower clamping plate 32, a sealing element 33, and a pressing column 34; a scraping assembly 4, a fixing plate 41, a first clamping plate 411, a second clamping plate 412, a scraping ring 42, and a drain hole 43; a filter element 5; a connecting rod 6; a connecting piece 7, and a third through hole 71; and a sealing assembly 8. Detailed Implementation

[0052] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0053] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] This utility model embodiment provides a filter, see [link]. Figure 1 and combined Figure 2 , Figure 1 This is a schematic diagram of the filter structure, which includes: filter cartridge 1, top cover 2, filter element clamping plate 3, scraping assembly 4, lifting mechanism, valve and multiple filter elements 5;

[0055] The top cover 2 is located on the top of the filter cartridge 1;

[0056] The filter element clamping plate 3 is disposed inside the filter cartridge 1, forming an upper chamber 11 and a lower chamber 12;

[0057] A liquid outlet 111 is provided on one side of the upper chamber 11;

[0058] The lower chamber 12 is provided with a drain outlet 121 and a liquid inlet 122. The drain outlet 121 is located at the bottom of the lower chamber 12, and the liquid inlet 122 is located on one side of the lower chamber 12.

[0059] The valve is located at drain outlet 121;

[0060] The filter element 5 has a columnar structure with a closed end at the bottom. Multiple filter holes are provided on the outer wall of the filter element 5, and the upper end of the filter element 5 is the liquid outlet end.

[0061] Multiple filter elements 5 are disposed in the lower chamber 12, and the upper part of the filter element 5 is fixed to the filter element clamping plate 3;

[0062] The filter element clamping plate 3 has a first through hole for connecting the upper chamber 11 and the liquid outlet end of the filter element 5;

[0063] The scraping assembly 4 is movably disposed in the lower chamber 12 and is used to scrape off impurities from the outer wall of the filter element 5;

[0064] The lifting mechanism is located on the filter cartridge 1 and is used to drive the scraping component 4 to lift.

[0065] It should be noted that by providing a drain port 121 and a liquid inlet 122 in the lower chamber 12, with the drain port 121 located at the bottom of the lower chamber 12 and the liquid inlet 122 located on one side of the lower chamber 12, when the liquid to be filtered enters through the liquid inlet 122, it is filtered by the filter element 5, then flows out from the liquid outlet of the filter element 5, enters the upper chamber 11 through the first through hole, and is finally discharged through the liquid outlet 111; while impurities are blocked on the outer wall of the filter element 5. When there are too many impurities on the outer wall of the filter element 5, the valve is opened first, and then the lifting mechanism drives the scraping component 4 to move up and down to scrape off the impurities on the outer wall of the filter element 5. The impurities fall off under their own gravity and are discharged from the drain port 121.

[0066] It should also be noted that the scraping component 4 of this application scrapes the outer walls of multiple filter elements 5 simultaneously.

[0067] In this embodiment of the invention, the upper cover 2 is disposed on the top of the filter cartridge 1, and the filter element clamping plate 3 is disposed inside the filter cartridge 1, forming an upper chamber 11 and a lower chamber 12. An outlet 111 is provided on one side of the upper chamber 11, and a drain 121 and an inlet 122 are provided in the lower chamber 12. The drain 121 is located at the bottom of the lower chamber 12, and the inlet 122 is located on one side of the lower chamber 12. A valve is disposed at the drain 121. The filter element 5 is configured as a columnar structure, with the lower end... As a closed end, the outer wall of filter element 5 has multiple filter holes. The upper end of filter element 5 is the liquid outlet end. Multiple filter elements 5 are vertically arranged in the lower chamber 12, and the upper part of filter element 5 is fixed to filter element clamping plate 3. Filter element clamping plate 3 has a first through hole for connecting the upper chamber 11 and the liquid outlet end of filter element 5. Scraping component 4 for scraping impurities from the outer wall of filter element 5 is movably arranged in the lower chamber 12. Lifting mechanism is arranged in filter cylinder 1, and lifting mechanism is used to drive scraping component 4 to lift and lower. With the filter disclosed above, when there are too many impurities on the outer wall of filter element 5, the lifting mechanism can drive scraping component 4 to scrape off the impurities on the outer wall of filter element 5 and discharge them through drain port 121 to ensure the filtration efficiency of the filter.

[0068] Specifically, the smear assembly 4 includes: a fixing plate 41 and multiple smear rings 42;

[0069] The fixing plate 41 has multiple mounting holes for the filter element 5 to pass through;

[0070] The scraper ring 42 is installed inside the mounting hole.

[0071] It should be noted that by opening multiple mounting holes in the fixed plate 41 and installing the scraper ring 42 in the mounting holes, the scraper ring 42 can scrape the outer wall of the columnar filter element 5 when the lifting mechanism drives the fixed plate 41 to move up and down.

[0072] Specifically, the scraper ring 42 is made of a deformable material.

[0073] It should be noted that, due to the possibility of errors in the drilling of mounting holes on the scraper and the possibility of assembly errors during the installation of filter element 5, there are certain errors in the assembly of filter element 5 with the mounting holes. In this case, the scraper ring 42 is made of a deformable material, so that the scraper ring 42 has a certain degree of deformability. This not only ensures that the scraper ring 42 can be installed in the mounting holes, but also ensures that the scraper ring 42 can scrape off the impurities on the outer wall of filter element 5 when the fixed plate 41 moves up and down.

[0074] Specifically, the fixing plate 41 includes: a first clamping plate 411 and a second clamping plate 412 disposed below the first clamping plate 411;

[0075] The first clamping plate 411 has a second through hole for the filter element 5 to pass through, wherein the upper diameter of the second through hole is smaller than the lower diameter of the second through hole, forming a first limiting step for restricting the passage of the scraper ring 42.

[0076] The second clamping plate 412 has a third through hole 71 for the filter element 5 to pass through. The lower diameter of the second through hole is smaller than the upper diameter of the second through hole, forming a second limiting step to restrict the passage of the scraper ring 42.

[0077] An installation groove for installing the scraper ring 42 is formed between the first limiting step and the second limiting step.

[0078] It should be noted that a second through hole for the filter element 5 is provided in the first clamping plate 411, and the upper diameter of the second through hole is smaller than the lower diameter of the second through hole, forming a first limiting step for restricting the passage of the scraper ring 42. A third through hole 71 for the filter element 6 is provided in the second clamping plate 412, and the lower diameter of the second through hole is smaller than the upper diameter of the second through hole, forming a second limiting step for restricting the passage of the scraper ring 42. This creates an installation groove for installing the scraper ring 42 between the first limiting step and the second limiting step. Thus, when the first clamping plate 411 and the second clamping plate 412 are raised and lowered, the scraper ring 42 can be effectively prevented from coming out of the second through hole and / or the third through hole 71.

[0079] Preferably, the distance between the first limiting step and the second limiting step is greater than the height of the scraper ring 42.

[0080] It should be noted that the distance between the first limiting step and the second limiting step is greater than the height of the scraper ring 42, which not only facilitates the installation of the scraper ring 42, but also allows the scraper ring 42 to have a certain amount of room to move.

[0081] Furthermore, the lifting mechanism includes: a connecting rod 6, a connecting piece 7, a sealing assembly 8, and a telescopic mechanism;

[0082] The telescopic mechanism is located on the upper cover 2;

[0083] One end of the connecting rod 6 is connected to the first clamping plate 411 via the connecting piece 7, and the other end passes through the filter element clamping plate 3 and the top cover 2 and extends out to connect with the extension rod of the telescopic mechanism.

[0084] The sealing assembly 8 is located between the connecting rod 6 and the filter element clamping plate 3.

[0085] It should be noted that one end of the connecting rod 6 is connected to the first clamping plate through the connecting piece 7, and the other end passes through the filter element clamping plate 3 and the upper cover 2 and extends out to be connected to the extension rod of the telescopic mechanism. Thus, when the extension rod of the telescopic mechanism extends and retracts, it can drive the first clamping plate 411 connected at the lower end to rise and fall. The rise and fall of the first clamping plate 411 can drive the scraping ring 42 to scrape the outer wall of the columnar filter element 5.

[0086] A sealing component 8 is provided between the connecting rod 6 and the filter element clamping plate 3 to prevent unfiltered liquid from entering the upper chamber 11 through the gap between the filter element clamping plate 3 and the connecting rod 6, thereby further ensuring the quality of the filtered liquid.

[0087] Preferably, the telescopic mechanism is a pneumatic cylinder or an electric cylinder.

[0088] It should be noted that the telescopic mechanism can be a pneumatic cylinder, an electric cylinder, or other mechanisms capable of driving the connecting rod 6 to rise and fall. Those skilled in the art can choose according to their needs.

[0089] Specifically, the first clamping plate 411 has a third through hole for the connector 7 to pass through;

[0090] The lower end of the connector 7 is provided with an annular limiting member for restricting the connector 7 from passing through the third through hole;

[0091] The upper end of connector 7 is threadedly connected to connector 6.

[0092] It should be noted that the upper end of the connector 7 has an axially threaded hole, and the lower end of the connecting rod 6 has an external thread, so that the upper end of the connector 7 can be threadedly connected to the connecting rod 6.

[0093] The first clamping plate 411 has a third through hole for the connector 7 to pass through, and an annular limiting member is provided at the lower end of the connector 7 to restrict the connector 7 from passing through the third through hole. The first clamping plate 411 and the second clamping plate 412 cooperate to clamp the annular limiting member. When the telescopic mechanism drives the connector 7 to rise and fall through the connecting rod 6, it can effectively ensure that the lower end of the connector 7 is firmly connected to the fixing plate 41, and prevent the lower end of the connector 7 from separating from the fixing plate 41.

[0094] Specifically, the fixing plate 41 has multiple drain holes 43.

[0095] It should be noted that multiple drain holes 43 are provided on the fixed plate 41. When the fixed plate 41 drives the scraper ring 42 to move upward, under the pressure of the fixed plate 41 and the filter element clamping plate 3, impurities can enter the area below the fixed plate 41 through the drain holes 43 and finally be discharged from the drain port 121 of the lower chamber 12.

[0096] Specifically, the lifting mechanism includes: a screw and a drive mechanism;

[0097] The screw is rotatably mounted inside the filter cartridge 1;

[0098] The fixing plate 41 has a screw hole that mates with the screw rod;

[0099] The drive mechanism is located on the upper cover 2 and is connected to the upper end of the screw. The drive mechanism is used to drive the screw to rotate.

[0100] It should be noted that the lifting mechanism is set as a screw and a drive mechanism, and the screw is rotatably set inside the filter cylinder 1. The fixed plate 41 has a screw hole that cooperates with the screw. The drive mechanism is set on the upper cover 2 and is connected to the upper end of the screw. Thus, the drive mechanism drives the fixed plate 41 to rise or fall by driving the screw to rotate, so as to drive the scraping component 4 to move up and down to scrape the impurities on the outer wall of the filter element 5. The impurities fall off under their own gravity and are discharged from the drain port 121.

[0101] Specifically, the filter element clamping plate 3 includes: an upper clamping plate 31, a lower clamping plate 32, a sealing element 33, and multiple clamping columns 34;

[0102] The lower clamping plate 32 is located below the upper clamping plate 31;

[0103] The sealing element 33 is disposed between the upper clamping plate 31 and the lower clamping plate 32;

[0104] The outlet end of filter element 5 is provided with an annular protrusion in the circumference;

[0105] The lower clamping plate 32 has a fourth through hole for the filter element 5 to pass through. The upper diameter of the fourth through hole is larger than the lower diameter of the fourth through hole, forming a third limiting step to restrict the passage of the annular protrusion.

[0106] The upper clamping plate 31 has a first through hole corresponding to the fourth through hole, wherein the diameter of the first through hole is smaller than the diameter of the annular protrusion;

[0107] The lower end of the clamping column 34 abuts against the upper clamping plate, and the upper end abuts against the upper cover 2.

[0108] It should be noted that the lower clamping plate 32 is positioned below the upper clamping plate 31, and the sealing element 33 is positioned between the upper clamping plate 31 and the lower clamping plate 32. The outlet end of the filter element 5 has an annular protrusion in the circumference. The lower clamping plate 32 has a fourth through hole for the filter element 5 to pass through, and the upper diameter of the fourth through hole is larger than the lower diameter of the fourth through hole, forming a third limiting step to restrict the passage of the annular protrusion. The upper clamping plate 31 has a first through hole corresponding to the fourth through hole, and the diameter of the first through hole is smaller than the diameter of the annular protrusion. Therefore, when installing the filter element 5, the filter element 5 is first inserted into the fourth hole from the upper chamber 11, and then the filter element 5 is fixed by the cooperation of the upper clamping plate 31 and the lower clamping plate 32. Finally, the lower end of the clamping column 34 abuts against the upper clamping plate, and the upper end abuts against the upper cover 2, further ensuring that the cooperation of the upper clamping plate 31 and the lower clamping plate 32 fixes the filter element 5 and ensures the sealing between the upper clamping plate 31 and the lower clamping plate 32.

[0109] Preferably, the sealing element 33 is a sealing ring.

[0110] Furthermore, the filter also includes: a first limit switch and a second limit switch;

[0111] Both the first limit switch and the second limit switch are located in the lower chamber 12;

[0112] The first limit switch is located at the bottom of the chamber;

[0113] The second limit switch is located on the filter element clamping plate 3.

[0114] It should be noted that by setting a first limit switch and a second limit switch in the lower chamber 12, with the first limit switch located at the bottom of the chamber and the second limit switch located on the filter element clamping plate 3, the stroke of the scraping component 4 can be controlled by the first and second limit switches during the up-and-down movement of the lifting mechanism. That is, when the scraping component 4 descends to the first limit switch, the lifting mechanism will be stopped and restarted in the reverse direction, causing the lifting mechanism to move the scraping component 4 upward. When the scraping component 4 rises to the second limit switch, the lifting mechanism will be stopped again.

[0115] It should also be noted that the first limit switch and the second limit switch in this application are magnetic induction switches.

[0116] It is worth noting that when the telescopic mechanism is driven by a cylinder, the first limit switch and the second limit switch can be set outside the cylinder. The telescopic range of the cylinder is determined by detecting the piston ring with a magnetic ring, so as to avoid the cylinder from colliding with the upper or lower part when it drives the scraping component to rise and fall.

[0117] Furthermore, the filter also includes a sealing assembly 8 disposed between the connecting rod 6 and the filter element clamping plate 3.

[0118] It should be noted that by setting a sealing component 8 between the connecting rod 6 and the filter element clamping plate 3, unfiltered liquid can be prevented from entering the upper chamber 11 through the gap between the filter element clamping plate 3 and the connecting rod 6, thereby further ensuring the quality of the filtered liquid.

[0119] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A filter, characterized in that, include: Filter cartridge, top cover, filter element clamping plate, scraping assembly, lifting mechanism, valve and multiple filter elements; The upper cover is disposed on the top of the filter cartridge; The filter element clamping plate is disposed inside the filter cartridge, forming an upper chamber and a lower chamber; A liquid outlet is provided on one side of the upper chamber; The lower chamber is provided with a drain outlet and a liquid inlet. The drain outlet is located at the bottom of the lower chamber, and the liquid inlet is located on one side of the lower chamber. The valve is located at the drain outlet; The filter element has a columnar structure with a closed end at the bottom. The outer wall of the filter element has multiple filter holes, and the upper end of the filter element is the liquid outlet end. Multiple filter elements are vertically arranged in the lower chamber, and the upper part of each filter element is fixed to the filter element clamping plate; The filter element clamping plate has a first through hole for connecting the upper chamber and the liquid outlet end of the filter element; The scraping assembly is movably disposed in the lower chamber and is used to scrape off impurities from the outer wall of the filter element; The lifting mechanism is located on the filter cylinder and is used to drive the scraping component to move up and down.

2. The filter according to claim 1, characterized in that, The scraping assembly includes: a fixing plate and multiple scraping rings; The fixing plate has multiple mounting holes for the filter element to pass through; The scraper ring is installed in the mounting hole.

3. The filter according to claim 2, characterized in that, The scraper ring is made of a deformable material.

4. The filter according to claim 2, characterized in that, The fixing plate includes: a first clamping plate and a second clamping plate disposed below the first clamping plate; The first clamping plate has a second through hole for the filter element to pass through, wherein the upper diameter of the second through hole is smaller than the lower diameter of the second through hole, forming a first limiting step for restricting the passage of the scraper ring; The second clamping plate has a third through hole for the filter element to pass through, wherein the lower diameter of the second through hole is smaller than the upper diameter of the second through hole, forming a second limiting step for restricting the passage of the scraper ring; An installation groove for installing the scraper ring is formed between the first limiting step and the second limiting step.

5. The filter according to claim 4, characterized in that, The lifting mechanism includes: a connecting rod, a connecting piece, a sealing assembly, and a telescopic mechanism; The telescopic mechanism is disposed on the upper cover; One end of the connecting rod is connected to the first clamping plate through the connecting member, and the other end passes through the filter element clamping plate and the top cover and protrudes to be connected to the extension rod of the telescopic mechanism; The sealing assembly is disposed between the connecting rod and the filter element clamping plate.

6. The filter according to claim 5, characterized in that, The first clamping plate has a third through hole for the connector to pass through; The lower end of the connector is provided with an annular limiting member for restricting the connector from passing through the third through hole; The upper end of the connector is threadedly connected to the connecting rod.

7. The filter according to claim 2, characterized in that, The fixing plate has multiple drainage holes.

8. The filter according to claim 2, characterized in that, The lifting mechanism includes: a screw and a drive mechanism; The screw is rotatably disposed inside the filter cylinder; The fixing plate has a screw hole that mates with the screw rod; The drive mechanism is disposed on the upper cover and is connected to the upper end of the screw for transmission. The drive mechanism is used to drive the screw to rotate.

9. The filter according to claim 1, characterized in that, The filter element clamping plate includes: an upper clamping plate, a lower clamping plate, a sealing element, and multiple clamping columns; The lower clamping plate is disposed below the upper clamping plate; The sealing element is disposed between the upper clamping plate and the lower clamping plate; The filter element has an annular protrusion at its liquid outlet end. The lower clamping plate has a fourth through hole for the filter element to pass through, wherein the upper diameter of the fourth through hole is larger than the lower diameter of the fourth through hole, forming a third limiting step for restricting the passage of the annular protrusion; The upper clamping plate has a first through hole corresponding to the fourth through hole, wherein the diameter of the first through hole is smaller than the diameter of the annular protrusion; The lower end of the clamping column abuts against the upper clamping plate, and the upper end abuts against the upper cover.

10. The filter according to any one of claims 1 to 9, characterized in that, Also includes: First limit switch and second limit switch; Both the first limit switch and the second limit switch are disposed in the lower cavity; The first limit switch is located at the lower part of the chamber; The second limit switch is disposed on the filter element clamping plate.

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