A combined filter device

Abstract

The application relates to a combined filter device in the technical field of filtration, which comprises filter boxes with liquid inlets on the top and liquid outlets on the bottom, the inner cavities of the filter boxes are provided with horizontal partition plates which divide the filter boxes into upper chambers and lower chambers, the horizontal partition plates are uniformly provided with a plurality of through holes, the through holes are provided with tubular filter cores penetrating through the through holes, the top of the tubular filter core is provided with a matching part in sealing cooperation with the upper end of the through hole, the bottom of the tubular filter core is provided with a connecting column coaxial with the tubular filter core and smaller in diameter than the tubular filter core, and the connecting column is detachably connected with a plug capable of sealingly cooperating with the bottom of the through hole. Due to the arrangement of the second sliding rod, the connecting column, the first sliding rod and the plug, the tubular filter core can be lifted and rotated, the plug can be sealedly cooperated with the through hole, the liquid to be filtered can be filtered through other tubular filter cores, and the tubular filter core can be removed, cleaned or replaced without stopping the machine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filtration, in particular to a combined filter device. BACKGROUND

[0002] It is known that a filter is an indispensable device on a pipeline for conveying medium, and is usually installed at an inlet of a pressure reducing valve, a pressure relief valve, a liquid level valve or other equipment.

[0003] After the contaminated liquid passes through the filter, impurities are blocked. When the filter element needs to be cleaned or replaced, the detachable filter element can be taken out for cleaning or replacement only after shutdown, which results in long shutdown time and affects production.

[0004] Therefore, the present application provides a combined filter device capable of cleaning or replacing the filter element online. SUMMARY

[0005] The present application aims to provide a combined filter device to solve the above problems.

[0006] The present application achieves the above-mentioned purpose by the following technical solutions:

[0007] The combined filter device comprises a filter box with a liquid inlet at the top and a liquid outlet at the bottom. A horizontal partition is arranged in the inner cavity of the filter box to divide the inner cavity into an upper chamber and a lower chamber. The horizontal partition is uniformly provided with a plurality of through holes. A tubular filter element is arranged through the through holes. The top of the tubular filter element is provided with a matching part in sealing cooperation with the upper end of the through hole. The bottom of the tubular filter element is provided with a connecting column coaxial with the tubular filter element and smaller in diameter than the tubular filter element. A plug capable of sealing cooperation with the bottom of the through hole is detachably connected to the connecting column. A liquid inlet chamber is arranged on one side of the upper chamber in the inner cavity of the filter box. A plurality of plate filter elements are arranged in sequence between the liquid inlet chamber and the upper chamber. The top of one side of all the plate filter elements and / or the bottom of one side of the liquid inlet chamber is provided with an inclined angle.

[0008] The plug is hollow inside and open at the upper end. A first T-shaped sliding groove open at the upper end is arranged on the inner wall of the plug. A first sliding rod matched with the first T-shaped sliding groove is arranged on the column body of the connecting column. A second T-shaped sliding groove open at the upper end is arranged on the outer wall of the plug. A second sliding rod matched with the second T-shaped sliding groove is arranged on the lower end of the hole wall of the through hole.

[0009] Preferably, the plug comprises a matching section capable of sealing cooperation with the bottom of the through hole. A connecting sleeve coaxial with the matching section and matched with the column body of the connecting column is arranged on the top surface of the matching section. A first T-shaped sliding groove is arranged on the inner wall of the connecting sleeve. A second T-shaped sliding groove is arranged on the outer wall of the connecting sleeve.

[0010] Preferably, the inner side wall of the filter box is provided with a receiving groove corresponding to the position of the side wall of the plate filter element, and the inner top wall of the filter box is provided with a through hole for the plate filter element pipe to pass through corresponding to the positions of the plate filter elements on both sides.

[0011] Preferably, the plate filter element comprises a fixed frame, the inner side of the fixed frame is provided with a filter structure, and the fixed frame is provided with an inclined angle corresponding to the top of one side of the upper chamber and / or the bottom of one side of the liquid inlet chamber.

[0012] Preferably, the dismounting mechanism for taking out or installing the tubular filter element and the plate filter element is further included.

[0013] The dismounting mechanism comprises an adsorption structure, and the top surface of the tubular filter element and the plate filter element is provided with a matching structure capable of corresponding connection with the adsorption structure.

[0014] The dismounting mechanism further comprises a driving structure capable of driving the adsorption structure to ascend and descend.

[0015] Preferably, the adsorption structure comprises a mounting disc, the bottom of the mounting disc is rotationally connected with a rotating disc, the lower disc surface of the rotating disc is rotationally symmetrical with respect to the center and is provided with two or three columns, and the lower end of the column is provided with an adsorption member.

[0016] The adsorption structure further comprises a first driving device for driving the rotating disc to rotate.

[0017] Preferably, the column comprises a fixed column with the upper end fixedly connected with the rotating disc, and a driving gear rotationally connected with the upper end of the column body of the fixed column.

[0018] The column further comprises two movable columns with the upper ends slidingly connected with the lower disc surface of the rotating disc, and the column body of the movable column is fixedly sleeved with a driven gear meshing with the driving gear, so that the movable column can move circumferentially along the fixed column.

[0019] The rotating disc is provided with a driving motor, and the output end of the driving motor is provided with a driving gear meshing with the driving gear.

[0020] Preferably, the lower disc surface of the rotating disc is provided with two sliding grooves corresponding to the movable columns one by one, and the top of the movable column is provided with a sliding part matching the sliding groove.

[0021] Preferably, the end portions of the two sliding grooves in the same direction are located between the upper end of the fixed column.

[0022] Preferably, the driving structure comprises an X-axis slide rail pair, a Y-axis slide rail pair and a Z-axis slide rail pair, and the X-axis slide rail pair, the Y-axis slide rail pair and the Z-axis slide rail pair constitute a slide rail group capable of driving the adsorption structure to move in three-dimensional space.

[0023] The beneficial effects are as follows:

[0024] 1. Due to the setting of the second slide rod, connecting column, first slide rod and plug, the tubular filter element can be removed by lifting and rotating the tubular filter element, and the plug and through hole can be sealed at the same time. At this time, the liquid to be filtered can be filtered from other tubular filter elements, realizing the removal of tubular filter elements for cleaning or replacement without stopping the machine.

[0025] 2. Due to the design of the plate filter element, the plate filter element can be lifted at the through hole near the liquid inlet chamber, allowing it to be removed from the filter box. At this time, the liquid to be filtered still needs to pass through the other three plate filter elements, without affecting the filtration effect. During installation, the plate filter element to be installed is pressed down through the through hole near the upper chamber to complete the installation. The entire process does not affect the normal operation of the filtration device, realizing the function of removing the plate filter element for cleaning or replacement without stopping the machine.

[0026] 3. Due to the design of the disassembly and assembly mechanism, the position of the adsorption element can be adjusted according to the type of tubular filter element and plate filter element, so that the adsorption elements are located in a straight line to adapt to the disassembly and assembly of plate filter elements, and the adsorption elements are distributed in an isosceles or equilateral triangle to adapt to the disassembly and assembly of tubular filter elements, thus realizing the function of automatically disassembling and assembling tubular filter elements and plate filter elements without stopping the machine.

[0027] The additional technical features and advantages of the present invention will become more apparent from the following description, or may be learned through practice of the invention. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 yes Figure 1 Enlarged section view of part I;

[0031] Figure 3 This is a schematic diagram of the disassembly and assembly mechanism in this invention;

[0032] Figure 4 This is a schematic diagram of the adsorption structure in this invention;

[0033] Figure 5 This is an exploded structural diagram of the horizontal baffle, tubular filter element, and plug in this invention.

[0034] The annotations in the attached figures are explained as follows:

[0035] 1, filter box; 11, horizontal partition; 12, second sliding rod; 2, tubular filter element; 21, matching part; 22, connecting column; 23, first sliding rod; 3, plug; 301, first T-shaped sliding groove; 302, second T-shaped sliding groove; 31, matching section; 32, connecting sleeve; 4, plate filter element; 41, fixed frame; 42, filter structure; 5, dismounting mechanism; 51, adsorption structure; 511, mounting disc; 512, rotating disc; 513, column body; 5131, fixed column; 5132, driving gear; 5133, movable column; 5134, driven gear; 514, suction member; 515, driving motor; 516, driving gear; 52, driving structure; 521, X-axis sliding rail pair; 522, Y-axis sliding rail pair; 523, Z-axis sliding rail pair. Embodiments

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0038] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] Example 1, as Figures 1-5 As shown, a combined filtration device includes a filter box 1 with an inlet at the top and an outlet at the bottom. The filter box 1 has a horizontal partition 11 that divides it into an upper chamber and a lower chamber. The horizontal partition 11 is evenly provided with a plurality of through holes. A tubular filter element 2 is provided through each through hole. The top of the tubular filter element 2 has a mating part 21 that seals with the upper end of the through hole.

[0044] As needed, the upper end of the through hole is a tapered part, and the mating part 21 is a tapered structure that matches the tapered part.

[0045] The bottom of the tubular filter element 2 is provided with a connecting post 22 that is coaxial with it and has a smaller diameter. The connecting post 22 is detachably connected to a plug 3 that can seal with the bottom of the through hole.

[0046] Furthermore, such as Figure 5As shown, the plug 3 is internally hollow and open at the upper end, the inner wall of the plug 3 is provided with a first T-shaped sliding groove 301 open at the upper end, and the column body of the connecting column 22 is provided with a first sliding rod 23 matched with the first T-shaped sliding groove 301; the outer wall of the plug 3 is provided with a second T-shaped sliding groove 302 open at the upper end, and the lower end of the hole wall is provided with a second sliding rod 12 matched with the second T-shaped sliding groove 302;

[0047] Specifically, the second sliding rod 12 is easier to move in the second T-shaped sliding groove 302 than the first sliding rod 23 in the first T-shaped sliding groove 301. By such arrangement, even if the tubular filter element 2 is rotated in the wrong direction, the second sliding rod 12 can still smoothly enter the position of one end of the wing part of the second T-shaped sliding groove 302, which can effectively prevent the plug 3 from falling off. Specifically, the wing part of the second T-shaped sliding groove 302 can be provided with a friction layer, so that the friction between the second sliding rod 12 and the second T-shaped sliding groove 302 is greater than the friction between the first sliding rod 23 and the first T-shaped sliding groove 301.

[0048] According to the need, in order to facilitate the smooth entry of the first sliding rod 23 into the first T-shaped sliding groove 301 and the smooth entry of the second sliding rod 12 into the second T-shaped sliding groove 302, the upper end openings of the first T-shaped sliding groove 301 and the second T-shaped sliding groove 302 are in the shape of a trumpet mouth; the intersection edges of the abdomen part and the wing part of the first T-shaped sliding groove 301 and the second T-shaped sliding groove 302 are all provided with chamfers; that is, the intersection edges of the abdomen part and the wing part of the first T-shaped sliding groove 301 are all provided with chamfers, and the intersection edges of the abdomen part and the wing part of the second T-shaped sliding groove 302 are all provided with chamfers.

[0049] According to the need, the inner wall of the plug 3 is uniformly and spacedly provided with at least three first T-shaped sliding grooves 301 open at the upper end along the circumference thereof, in this embodiment, the first T-shaped sliding groove 301 is provided with three, and in other embodiments, other number of first T-shaped sliding grooves 301 can also be provided, and the specific number is not limited.

[0050] According to the need, the outer wall of the plug 3 is uniformly and spacedly provided with at least three second T-shaped sliding grooves 302 open at the upper end along the circumference thereof, in this embodiment, the second T-shaped sliding groove 302 is provided with three, and in other embodiments, other number of second T-shaped sliding grooves 302 can also be provided, and the specific number is not limited.

[0051] Specifically, the outer end of the first sliding rod 23 constitutes a circle with a diameter smaller than the diameter of the tubular filter element 2, and the inner end of the second sliding rod 12 constitutes a circle with a diameter greater than the diameter of the tubular filter element 2.

[0052] Further, as shown in the figure, Figure 5 As shown, the plug 3 includes a matching section 31 capable of sealingly cooperating with the bottom of the through hole, the top surface of the matching section 31 is provided with a connecting sleeve 32 coaxial therewith and matched to be sleeved on the column body of the connecting column 22, the inner wall of the connecting sleeve 32 is provided with the first T-shaped sliding groove 301, and the outer wall is provided with the second T-shaped sliding groove 302.

[0053] like Figures 1-2 As shown, the inner cavity of the filter box 1 is provided with an inlet chamber on one side of the upper chamber, and a number of plate filter elements 4 are arranged in sequence between the inlet chamber and the upper chamber. All the plate filter elements 4 have an oblique angle on the top side of the upper chamber and / or the bottom side of the inlet chamber.

[0054] Preferably, the plate filter element 4 has at least three elements; this embodiment uses four as an example.

[0055] In this embodiment, as Figures 1-2 As shown, when the upper end of the filter box 1 is blocked, the inner side wall of the filter box 1 is provided with a receiving groove corresponding to the side wall of the plate filter element 4, and the inner top wall of the filter box 1 is provided with a through hole for the plate filter element 4 to pass through.

[0056] With this configuration, when cleaning or replacing the tubular filter element 2 is required, the connecting sleeve 32 can be inserted into the through hole by lifting the tubular filter element 2, and the mating section 31 can be sealed and abutted against the lower end of the through hole. At the same time, the second slide rod 12 is located at the lower end of the belly of the second T-shaped slide groove 302. Then, by rotating the tubular filter element 2, the tubular filter element 2 drives the connecting column 22 to rotate, the connecting column 22 drives the first slide rod 23 to rotate, and the first slide rod 23 drives the plug 3 to rotate, so that the second slide rod 12 is located at one end of the wing of the second T-shaped slide groove 302, and the plug 3 is sealed and assembled with the lower end of the through hole. Then, the tubular filter element 2 is rotated again, so that the first slide rod 23 is located at the lower end of the belly of the first T-shaped slide groove 301. Then, the tubular filter element 2 is lifted again to complete the removal of the tubular filter element 2. At this time, the liquid to be filtered can be filtered from other tubular filter elements 2, realizing the removal, cleaning or replacement of the tubular filter element 2 without stopping the machine.

[0057] When cleaning or replacing the plate filter element 4 is required, the plate filter element 4 can be lifted at the through hole near the liquid inlet chamber, allowing it to be removed from the filter box 1. At this time, the liquid to be filtered still needs to pass through the other three plate filter elements 4, without affecting the filtration effect. During installation, the plate filter element 4 to be installed is pressed down through the through hole near the upper chamber. Due to the angled setting of the plate filter element 4, the other plate filter elements 4 are subjected to a force biased towards the liquid inlet chamber and move towards the side closer to the liquid inlet chamber, making room for the plate filter element 4 to be installed. Then, continue to press the plate filter element 4 to be installed to complete the installation. The whole process does not affect the normal operation of the filtration device, realizing the function of removing the plate filter element 4 for cleaning or replacement without stopping the machine.

[0058] As needed, both ends of the wings of the first T-shaped slide 301 and the second T-shaped slide 302 are provided with locking structures. In other words, the slide rod will not easily move to the center position of the corresponding T-shaped slide wing, thereby preventing the plug 3 from falling off.

[0059] Furthermore, such as Figure 2 As shown, the plate filter element 4 includes a fixed frame 41, a filter structure 42 is provided inside the fixed frame 41, and the fixed frame 41 has an angle on the top of one side corresponding to the upper chamber and / or the bottom of one side corresponding to the liquid inlet chamber.

[0060] In some embodiments, such as Figure 1 , 3 As shown in -4, it also includes a disassembly and assembly mechanism 5 for removing or installing the tubular filter element 2 and the plate filter element 4;

[0061] The disassembly and assembly mechanism 5 includes an adsorption structure 51. The top surfaces of the tubular filter element 2 and the plate filter element 4 are provided with a mating structure that can be connected to the adsorption structure 51.

[0062] The disassembly and assembly mechanism 5 also includes a drive structure 52 that can lift and lower the adsorption structure 51.

[0063] Furthermore, such as Figure 4 As shown, the adsorption structure 51 includes a mounting plate 511, a rotating plate 512 is rotatably connected to the bottom of the mounting plate 511, and two or three columns 513 are symmetrically arranged on the lower surface of the rotating plate 512 with respect to its center. Adsorption elements 514 are provided at the lower end of the columns 513.

[0064] The adsorption structure 51 also includes a first driving device for driving the rotating disk 512 to rotate.

[0065] Depending on the requirements, the adsorption element 514 can be a strong magnet, that is, the adsorption element 514 is a magnet with a large attraction force; the matching structure is made of a material that can be attracted by a magnet.

[0066] In this embodiment, the column 513 includes a fixed column 5131 fixedly connected to the upper end of the rotating disk 512, and a drive gear 5132 rotatably connected to the upper end of the fixed column 513.

[0067] The column 513 also includes two movable columns 5133 whose upper ends are slidably connected to the lower surface of the rotating disk 512, and the movable column 5133 is fixedly sleeved with a driven gear 5134 that meshes with the driving gear 5132, so that the movable column 5133 can move circumferentially along the fixed column 5131.

[0068] Furthermore, such as Figure 4As shown, the lower surface of the rotating disk 512 is provided with two sliding grooves that correspond one-to-one with the movable column 5133, and the top of the movable column 5133 is provided with a sliding part that matches the sliding groove; as needed, the sliding groove can be a dovetail groove or a T-shaped groove.

[0069] Furthermore, the ends of the two sliding grooves facing the same direction are located at the same distance from the upper end of the fixed column 5131; the curvature of the sliding groove is 55~65 degrees; preferably, the moving span of the movable column 5133 is 60 degrees, wherein when the movable column 5133 is at one extreme, the movable column 5133 and the fixed column 5131 are on the same straight line, and when the movable column 5133 is at the other extreme, the movable column 5133 and the fixed column 5131 are distributed in an equilateral triangle.

[0070] The rotating disk 512 is equipped with a drive motor 515, and the output end of the drive motor 515 is equipped with a drive gear 516 that meshes with the drive gear 5132.

[0071] This configuration, due to the distribution of the adsorption elements 514, allows them to adsorb the top surface of either the tubular or plate filter element, achieving force balance between the two. Combined with the drive structure 52, this enables the stable lifting and removal of the filter element. Specifically, when removing a plate filter element, the adsorption elements 514 are first aligned on a straight line. Then, the drive structure 52 lowers the adsorption structure, causing the adsorption elements 514 to contact and adsorb the top surface of the plate filter element. The drive structure 52 then raises the adsorption structure, removing the plate filter element. Similarly, it can also be used to install plate filter elements. When removing a tubular filter element, the drive motor 515 drives the drive gear 516 to rotate, which in turn drives the drive gear 5132. The drive gear 5132 then drives the driven gear 5134 to rotate. Gear 5134 drives movable column 5133 to move, so that movable column 5133 and fixed column 5131 are distributed in an isosceles triangle, preferably in an equilateral triangle. Then, the drive structure 52 drives the adsorption structure to descend, so that the adsorption element 514 contacts and adsorbs the top surface of the tubular filter element. Then, the drive structure 52 drives the adsorption structure to rise, and the first drive device drives the rotating disk 512 to rotate, thereby driving the tubular filter element to rotate, realizing the function of removing the tubular filter element in the combined filtration device of the applicant's claim. Similarly, it can also realize the function of installing the tubular filter element.

[0072] Furthermore, such as Figure 3 As shown, the driving structure 52 includes an X-axis slide rail pair 521, a Y-axis slide rail pair 522, and a Z-axis slide rail pair 523. The X-axis slide rail pair 521, the Y-axis slide rail pair 522, and the Z-axis slide rail pair 523 constitute a slide rail group capable of driving the adsorption structure 51 to move in three-dimensional space.

[0073] This configuration allows the adsorption structure 51 to rise or fall via the drive structure 52, thereby enabling the tubular filter element 2 and plate filter element 4 to be raised or lowered when removing or installing them, in conjunction with the adsorption structure 51.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined filtration device, comprising a filter box (1) having an inlet at the top and an outlet at the bottom, wherein the filter box (1) has a horizontal partition (11) dividing it into an upper chamber and a lower chamber, and each horizontal partition (11) has a plurality of through holes, wherein a tubular filter element (2) is fitted through the through holes, characterized in that: The tubular filter element (2) has a mating part (21) at the top that seals with the upper end of the through hole, and a connecting post (22) at the bottom of the tubular filter element (2) that is coaxial with it and has a smaller diameter. The connecting post (22) is detachably connected to a plug (3) that seals with the bottom of the through hole. The plug (3) is hollow inside and open at the top. The inner wall of the plug (3) is provided with a first T-shaped groove (301) with an open top. The column body of the connecting column (22) is provided with a first sliding rod (23) that matches the first T-shaped groove (301). The outer wall of the plug (3) is provided with a second T-shaped groove (302) with an open top. The lower end of the through hole wall is provided with a second sliding rod (12) that matches the second T-shaped groove (302). The second T-shaped slide (302) has a friction layer on its wing. The moving resistance of the first slide rod (23) is less than that of the second slide rod (12), so that the plug (3) is fixed by the second slide rod (12) first when rotating, thus preventing it from falling off. The filter box (1) has an inlet chamber located on one side of the upper chamber, and a number of plate filter elements (4) arranged in sequence are provided between the inlet chamber and the upper chamber. All the plate filter elements (4) have an oblique angle on the top of one side of the upper chamber and / or the bottom of one side of the inlet chamber. The plug (3) includes a mating section (31) that can seal with the bottom of the through hole. The top surface of the mating section (31) is provided with a connecting sleeve (32) that is coaxial with it and is fitted onto the body of the connecting column (22). The inner wall of the connecting sleeve (32) is provided with a first T-shaped groove (301), and the outer wall is provided with a second T-shaped groove (302). It also includes a disassembly and assembly mechanism (5) for removing or installing tubular filter elements (2) and plate filter elements (4); The disassembly and assembly mechanism (5) includes an adsorption structure (51), and the top surfaces of the tubular filter element (2) and the plate filter element (4) are provided with a matching structure that can be connected to the adsorption structure (51). The disassembly and assembly mechanism (5) also includes a drive structure (52) that can drive the adsorption structure (51) to rise and fall. The adsorption structure (51) includes a mounting plate (511), a rotating plate (512) is rotatably connected to the bottom of the mounting plate (511), and two or three columns (513) are symmetrically arranged on the lower surface of the rotating plate (512) with respect to its center. The lower end of the column (513) is provided with an adsorption element (514). The adsorption structure (51) also includes a first driving device for driving the rotating disk (512) to rotate; The column (513) includes a fixed column (5131) fixedly connected to the upper end of the rotating disk (512), and the upper end of the fixed column (5131) is rotatably connected to the drive gear (5132). The column (513) also includes two movable columns (5133) whose upper ends are slidably connected to the lower surface of the rotating disk (512), and the movable column (5133) is fixedly sleeved with a driven gear (5134) that meshes with the driving gear (5132), so that the movable column (5133) can move circumferentially along the fixed column (5131); The rotating disk (512) is equipped with a drive motor (515), and the output end of the drive motor (515) is equipped with a drive gear (516) that meshes with the drive gear (5132). The lower surface of the rotating disk (512) is provided with two sliding grooves that correspond one-to-one with the movable column (5133), and the top of the movable column (5133) is provided with a sliding part that matches the sliding groove.

2. The combined filtration device according to claim 1, characterized in that: The inner side wall of the filter box (1) is provided with a receiving groove corresponding to the side wall of the plate filter element (4), and the inner top wall of the filter box (1) is provided with through holes for the plate filter element (4) to pass through, corresponding to the positions of the plate filter elements (4) on both sides.

3. The combined filtration device according to claim 1, characterized in that: The plate filter element (4) includes a fixed frame (41), and a filter structure (42) is provided on the inner side of the fixed frame (41). The fixed frame (41) has an oblique angle on the top of one side of the upper chamber and / or the bottom of one side of the liquid inlet chamber.

4. The combined filtration device according to claim 1, characterized in that: The ends of the two sliding grooves in the same direction are located at the same distance from the upper end of the fixed column (5131); the arc of the sliding groove is 55~65 degrees.

5. A combined filtration device according to claim 1, characterized in that: The driving structure (52) includes an X-axis slide rail pair (521), a Y-axis slide rail pair (522), and a Z-axis slide rail pair (523). The X-axis slide rail pair (521), the Y-axis slide rail pair (522), and the Z-axis slide rail pair (523) constitute a slide rail group that can drive the adsorption structure (51) to move in three-dimensional space.

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