A filter element component

Abstract

The present invention relates to the technical field of filters and discloses a filter element assembly of a filter, comprising a barrel shell, a filter element is arranged inside the barrel shell, an air outlet cabin connected to the filter element is installed at the bottom of the barrel shell, a lifting mechanism is connected to the bottom of the air outlet cabin, the lifting mechanism passes through the air outlet cabin to the top of the filter element, the top of the output shaft of the lifting mechanism is connected to an air pressure plate through a connecting piece, an air inlet opening is opened at the top of the barrel shell, a one-way valve 1 is fixedly connected to the inner wall of the air inlet opening, a plurality of through-holes are opened at the top of the air pressure plate, a two-way valve is fixedly connected in each of the plurality of through-holes, and a cleaning mechanism is fixedly connected to the bottom of the air pressure plate; the present invention is provided with a lifting mechanism and the air pressure plate, and the air entering the barrel shell can be pressurized during operation, and the gas inside the barrel shell can be quickly filtered through the filter element, so that the filter element assembly has its own air pressurization effect, and the air circulation effect and filtering efficiency are not affected by the attachment of filter particles.

Description

Technical Field

[0001] The invention relates to the technical field of filters, and more particularly to a filter element assembly of a filter. Background Art

[0002] A filter is a device used to filter impurities and pollutants in the air. It mainly captures dust from the gas-solid two-phase flow through the action of porous filter materials and purifies the gas. It captures dust, pollen, bacteria, viruses, mold, smoke, odor and other tiny particulate matter in the air, thereby achieving the effect of purifying the gas. It is often used in air equipment.

[0003] The filter element assembly of the existing filter has some defects: first, filtered particles will adhere to the surface of the filter element during long-term use, and the attached particles will affect the normal circulation of gas, reduce the flow rate, and cause slow filtration efficiency, affecting work efficiency; second, when too many particles adhere to the surface of the filter element during long-term use, the filter holes will be completely blocked and cannot be used normally. Therefore, the filter element needs to be cleaned and maintained frequently, causing inconvenience in use. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a filter element assembly to solve the problem that particles filtered out by the traditional filter element after long-term use in the above-mentioned background technology easily cause difficulty in air circulation of the filter element, thereby reducing the filtration efficiency; secondly, the filter element needs to be cleaned frequently to avoid clogging, causing inconvenience in use.

[0005] The present invention provides the following technical solutions: a filter element assembly of a filter, comprising a cylindrical shell, a filter element is arranged inside the cylindrical shell, an air outlet chamber docking with the filter element is installed at the bottom of the cylindrical shell, a lifting mechanism is docked at the bottom of the air outlet chamber, the lifting mechanism passes through the air outlet chamber to the top of the filter element, the top of the output shaft of the lifting mechanism is connected to the air pressure plate through a connecting piece, an air inlet opening is opened at the top of the cylindrical shell, a one-way valve is fixedly connected to the inner wall of the air inlet opening, a plurality of through-holes are opened at the top of the air pressure plate, a two-way valve is fixedly connected to the plurality of through-holes, and a cleaning mechanism is fixedly connected to the bottom of the air pressure plate;

[0006] The cleaning mechanism comprises a plurality of vertical rods, the bottoms of the plurality of vertical rods are fixedly connected with collars, the inner walls of the collars are fixedly connected with brushes, and the brushes surround the side walls of the filter element and contact the side walls of the filter element.

[0007] Furthermore, the lifting mechanism includes a bottom shell, an electric cylinder is fixedly mounted on the inner wall of the bottom shell, the electric cylinder penetrates to the top of the filter element, and an output shaft of the electric cylinder is connected to the connecting element.

[0008] Furthermore, the filter element includes a fixed mesh cylinder, a main filter element is fixedly installed on the side wall of the fixed mesh cylinder, a fixed ring block is arranged on the top of the inner cavity of the main filter element, the fixed ring block is fixedly connected to the side wall of the electric cylinder, a pressure cover is threadedly sleeved on the side wall of the fixed ring block, and the pressure cover presses and fixes the top of the mesh cylinder.

[0009] Furthermore, bosses are fixedly connected on both sides of the collar, and sliding grooves are provided on both sides of the inner wall of the cylinder shell, and the two bosses are slidably sleeved in the two sliding grooves respectively.

[0010] Furthermore, the slide groove is in a spiral arc shape, and the number of spiral turns is half a turn.

[0011] Furthermore, the connecting piece includes a threaded ring cylinder, a round block is movably sleeved in the inner cavity of the threaded ring cylinder, a cover is threadedly sleeved on the side wall of the round block, a through hole penetrating into the inner cavity of the threaded ring cylinder is opened at the bottom of the cover, and the diameter of the through hole is smaller than the diameter of the round block, and the output end of the lifting mechanism is connected to the cover through the through hole at the bottom of the cover.

[0012] Furthermore, the air outlet cabin includes a main cabin body, a plug pipe connected to the interior is arranged on the top of the main cabin body, an internally threaded cylinder wall is arranged on the side wall of the main cabin body, the internally threaded cylinder wall is threadedly sleeved on the bottom of the side wall of the cylinder shell, an air outlet groove is opened on the inner wall of the main cabin body, and the plug pipe is inserted into the inner cavity of the filter element and fits tightly with the inner wall of the filter element.

[0013] Furthermore, the structure of the one-way valve 2 is the same as that of the one-way valve 1, and the one-way valve 2 includes a valve housing, the inner wall of the valve housing is fixedly connected to a column via a fixed frame, a movable column is slidably sleeved on the inner cavity of the column, the top of the movable column is transmission-connected to the top of the inner wall of the column via a tension spring, and the bottom of the movable column is fixedly connected to a conical valve plug.

[0014] Furthermore, a column groove is provided inside the movable column, and a positioning block is slidably sleeved in the column groove. A through hole is provided on the top of the movable column, and the diameter of the through hole is smaller than the diameter of the positioning block. A positioning column is fixedly connected to the top of the positioning block, and the positioning column passes through the through hole and is fixedly connected to the top of the inner wall of the column tube.

[0015] Furthermore, the convex column includes a main column and a ball. A hemispherical groove is opened at one end of the main column. The ball is movably sleeved in the hemispherical groove and embedded in the slide groove.

[0016] Technical effects and advantages of the present invention:

[0017] The present invention is provided with a lifting mechanism and an air pressure plate, and can pressurize the air entering the cylinder shell during operation, so that the gas inside the cylinder shell can be quickly filtered through the filter element, so that the filter element assembly has its own air pressurization effect, and avoids the effect of air circulation and filtering efficiency affected by the attachment of filter particles;

[0018] In addition, during the operation of the lifting mechanism, the air pressure plate cooperates with the cleaning mechanism to vertically sweep the surface of the filter element, thereby avoiding clogging caused by a large number of particles adhering to the surface of the filter element, thereby achieving an automatic cleaning effect during the operation of the filter, without the need for manual disassembly and cleaning of the filter element, thus improving the maintenance cycle of the device and making the filter element assembly more convenient to use;

[0019] During the operation of the cleaning mechanism, the coordination of the boss and the slide groove can improve the stability of the movement of the cleaning mechanism, thereby preventing the displacement of the boss and the slide groove from scratching the filter element and causing the filter element to rupture and damage. Moreover, due to the shape characteristics of the slide groove, the boss and the slide groove can also drive the ring to rotate when they cooperate, thereby causing the cleaning mechanism to rotate during the vertical sweeping of the filter element surface, thereby increasing the sweeping range and enhancing the cleaning effect of attached particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 Schematic diagram of the splitting of the air pressure plate and the one-way valve;

[0023] Figure 4 For the present invention Figure 2 Schematic diagram of the cleaning mechanism structure;

[0024] Figure 5 For the present invention Figure 2 Schematic diagram of the filter element and lifting mechanism structure;

[0025] Figure 6 For the present invention Figure 2 Schematic diagram of the inner wall structure of the cylinder shell;

[0026] Figure 7 For the present invention Figure 2 Schematic diagram of the connecting parts structure in FIG.

[0027] Figure 8 For the present invention Figure 2 Schematic diagram of the cross-sectional structure of the air outlet cabin;

[0028] Fig. 9 For the present invention Figure 2Schematic diagram of the one-way valve structure II;

[0029] Fig.10 For the present invention Figure 6 Schematic diagram of the convex column structure in .

[0030] The accompanying drawings are marked as follows: 1. cylinder shell; 2. filter element; 3. air outlet cabin; 4. lifting mechanism; 5. connecting piece; 6. air pressure plate; 7. cleaning mechanism; 8. one-way valve one; 9. one-way valve two; 10. slide groove; 71. vertical rod; 72. collar; 73. brush; 74. convex column; 21. fixed mesh cylinder; 22. main filter element; 23. fixed ring block; 24. pressure cover; 41. bottom shell; 42. electric cylinder; 51. threaded ring cylinder; 52. round block; 53. sleeve cover; 31. main cabin body; 32. insert tube; 33. internal thread cylinder wall; 91. valve shell; 92. fixing frame; 93. column cylinder; 94. movable column; 95. tension spring; 96. truncated cone valve plug; 97. positioning column; 98. positioning block; 741. main column; 742. ball. DETAILED DESCRIPTION

[0031] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Reference Figure 1-Figure 4 The present invention provides a filter element assembly of a filter, comprising a cartridge shell 1, a filter element 2 is arranged inside the cartridge shell 1, an air outlet chamber 3 connected to the filter element 2 is installed at the bottom of the cartridge shell 1, a lifting mechanism 4 is connected to the bottom of the air outlet chamber 3, the lifting mechanism 4 penetrates the air outlet chamber 3 to the top of the filter element 2, the top of the output shaft of the lifting mechanism 4 is connected to a pressure plate 6 through a connecting member 5, an air inlet opening is opened at the top of the cartridge shell 1, a one-way valve 8 is fixedly connected to the inner wall of the air inlet opening, a plurality of through-holes are opened at the top of the pressure plate 6, and a one-way valve 9 is fixedly connected to each of the plurality of through-holes, and a cleaning mechanism 7 is fixedly connected to the bottom of the pressure plate 6;

[0033] The cleaning mechanism 7 includes a plurality of vertical rods 71 ​​, the bottoms of which are fixedly connected to collars 72 , the inner walls of which are fixedly connected to brushes 73 , which surround the side walls of the filter element 2 and contact the side walls of the filter element 2 .

[0034] Reference Figure 5 The lifting mechanism 4 includes a bottom shell 41, and an electric cylinder 42 is fixedly installed on the inner wall of the bottom shell 41. The electric cylinder 42 penetrates to the top of the filter element 2. The output shaft of the electric cylinder 42 is connected to the connecting piece 5. The electric cylinder 42 can be retracted to achieve the lifting effect of the air pressure plate 6. In addition, the electric cylinder 42 is convenient for connecting to the control system, so as to control the cleaning frequency of the cleaning mechanism 7 on the filter element 2, and the air pressure plate 6 on the gas compression rate inside the cylinder shell 1, so as to achieve the effect of adjusting the gas filtering speed.

[0035] Reference Figure 5The filter element 2 includes a fixed mesh cylinder 21, a main filter element 22 is fixedly installed on the side wall of the fixed mesh cylinder 21, and a fixed ring block 23 is arranged on the top of the inner cavity of the main filter element 22. The fixed ring block 23 is fixedly connected to the side wall of the electric cylinder 42, and a pressure cap 24 is threadedly sleeved on the side wall of the fixed ring block 23. The pressure cap 24 presses the top of the fixed mesh cylinder 21. When the filter element assembly is in operation, the gas first enters the inside of the cylinder shell 1 and then passes through the filter element 2 to achieve the filtering effect. Therefore, it is necessary to ensure the sealing performance between the filter element 2 and the electric cylinder 42. When the unfiltered gas passes through the gap between the filter element 2 and the electric cylinder 42, the filtering effect cannot be achieved. Through the structural setting of the filter element 2, after the fixed ring block 23 and the pressure cap 24 are connected, the fixed mesh cylinder 21 is pressed inside the cylinder shell 1. On the one hand, the filter element 2 can be fixed inside the cylinder shell 1 to prevent the filter element 2 from being displaced, thereby improving its stability. On the other hand, the sealing effect between the filter element 2 and the electric cylinder 42 can be ensured to avoid that some gases cannot achieve the filtering effect.

[0036] Reference Figure 6 , both sides of the collar 72 are fixedly connected with protruding columns 74, and both sides of the inner wall of the shell 1 are provided with sliding grooves 10. The two protruding columns 74 are slidably sleeved in the two sliding grooves 10 respectively. When the cleaning mechanism 7 is cleaning the side wall of the filter element 2, a number of vertical rods 71 ​​drive the collar 72 to move up and down. In this process, the vertical rods 71 ​​are prone to vibrate, causing the collar 72 to move radially, which is easy to cause scratches and damage to the filter element 2. To avoid this situation, by setting the protruding columns 74 to cooperate with the sliding grooves 10, the radial displacement of the collar 72 can be limited, thereby improving the stability of the cleaning mechanism 7 and preventing damage to the filter element 2.

[0037] Reference Figure 6 The slide groove 10 is in a spiral arc shape, and the number of spiral turns is one-half turn. Through the operating characteristics of the lifting mechanism 4, the brush 73 can only achieve a vertical sweeping effect, and the cleaning range and cleaning effect are limited. However, through the shape characteristics of the slide groove 10, when the protrusion 74 slides inside the slide groove 10, it will drive the cleaning mechanism 7 to rotate, so that the brush 73 can also rotate during the vertical sweeping process, thereby improving the cleaning range and cleaning effect.

[0038] Reference Figure 7The connecting member 5 includes a threaded ring cylinder 51, a round block 52 is movably sleeved on the inner cavity of the threaded ring cylinder 51, and a cover 53 is threadedly sleeved on the side wall of the round block 52. A through hole that penetrates into the inner cavity of the threaded ring cylinder 51 is opened at the bottom of the cover 53, and the diameter of the through hole is smaller than the diameter of the round block 52. The output end of the lifting mechanism 4 passes through the through hole at the bottom of the cover 53 and is connected with the cover 53. When the cleaning mechanism 7 rotates during operation, the air pressure disk 6 will be driven to rotate synchronously. In order to avoid the influence of the rotation of the air pressure disk 6 on the lifting mechanism 4, the structural setting of the connecting member 5 allows the round block 52 to rotate inside the threaded ring cylinder 51, and the threaded ring cylinder 51 is connected to the air pressure disk 6, and the round block 52 is connected to the output shaft of the lifting mechanism 4, so that the air pressure disk 6 does not cause torque to the lifting mechanism 4 when it rotates, thereby avoiding the influence on the lifting mechanism 4.

[0039] Reference Figure 8 The air outlet cabin 3 includes a main cabin body 31, a plug 32 communicating with the interior is arranged on the top of the main cabin body 31, an internally threaded cylinder wall 33 is arranged on the side wall of the main cabin body 31, and the internally threaded cylinder wall 33 is threadedly sleeved on the bottom of the side wall of the cylinder shell 1, and an air outlet groove is opened on the inner wall of the main cabin body 31, and the plug 32 is inserted into the inner cavity of the filter element 2 and fits tightly with the inner wall of the filter element 2. The air outlet cabin 3 needs to ensure the sealing performance between the filter element 2 and the cylinder shell 1, on the one hand, to avoid gas leakage inside the cylinder shell 1, and on the other hand, to avoid the unfiltered gas inside the cylinder shell 1 directly entering the main cabin body 31 and being discharged. Through the structural setting of the air outlet cabin 3, the sealing between the air outlet cabin 3 and the cylinder shell 1 can be ensured by the connection mode between the internally threaded cylinder wall 33 and the cylinder shell 1, and the sealing performance between the filter element 2 and the air outlet cabin 3 can be ensured by the contact relationship between the plug 32 and the inner wall of the filter element 2.

[0040] Reference Fig. 9 The structure of the one-way valve 29 is the same as that of the one-way valve 18. The one-way valve 29 includes a valve housing 91. The inner wall of the valve housing 91 is fixedly connected to a cylinder 93 through a fixing frame 92. A moving column 94 is slidably sleeved in the inner cavity of the cylinder 93. The top of the moving column 94 is transmission-connected to the top of the inner wall of the cylinder 93 through a tension spring 95. The bottom of the moving column 94 is fixedly connected to a truncated cone-shaped valve plug 96. When the air pressure at the top of the truncated cone-shaped valve plug 96 is too high, the gas passes through the valve housing 91 under the influence of the air pressure and pushes the truncated cone-shaped valve plug 96 downward. At this time, the gas from top to bottom The air can flow through the one-way valve 29, and when the air pressure at the bottom of the truncated cone-shaped valve plug 96 is too high, the truncated cone-shaped valve plug 96 is pressed against the bottom of the valve housing 91 to achieve a sealing effect, so that the airflow from bottom to top cannot pass through the one-way valve 29, thereby achieving a one-way flow effect. Since the airflow passing through the one-way valve 29 carries particles, the particles are easily accumulated inside the one-way valve 29 to cause blockage. The shape of the truncated cone-shaped valve plug 96 can make the accumulated particles slide down from the side wall of the truncated cone-shaped valve plug 96, thereby avoiding blockage of the one-way valve 29.

[0041] Reference Fig. 9A column groove is provided inside the movable column 94, and a positioning block 98 is slidably sleeved in the column groove. A through hole is provided on the top of the movable column 94, and the diameter of the through hole is smaller than the diameter of the positioning block 98. A positioning column 97 is fixedly connected to the top of the positioning block 98. The positioning column 97 passes through the through hole and is fixedly connected to the top of the inner wall of the column tube 93. When the one-way valve 9 is in operation, the movable column 94 is at risk of falling off from the inside of the column tube 93. By setting the positioning column 97 and the positioning block 98, the moving distance of the movable column 94 can be limited, thereby avoiding the moving column 94 from falling off.

[0042] Reference Fig.10 The boss 74 includes a main column 741 and a ball 742. A hemispherical groove is opened at one end of the main column 741. The ball 742 is movably sleeved in the hemispherical groove. The ball 742 is embedded in the slide groove 10. When a large friction force is generated by the boss 74 sliding in the slide groove 10, the vertical displacement of the cleaning mechanism 7 is affected. Through the structural setting of the boss 74, the ball 742 rolls in the slide groove 10, which can avoid the boss 74 from generating a large friction force in the slide groove 10.

[0043] The working principle of the present invention is as follows: when in use, the gas enters the interior of the cartridge shell 1 through the one-way valve 1 8, and passes through the one-way valve 2 9 to the bottom of the air pressure plate 6. The gas inside the cartridge shell 1 passes through the filter element 2 to filter the gas, and the filtered particles adhere to the surface of the filter element 2. The filtered gas reaches the inner cavity of the filter element 2 and enters the gas outlet chamber 3 from the bottom end and is discharged, thereby completing the filtering process of the filter assembly;

[0044] During this process, the operation of the lifting mechanism 4 can drive the air pressure plate 6 to rise and fall. When the air pressure plate 6 moves down, the gas at the bottom is pressurized, and the pressurized gas will quickly pass through the filter element 2 and enter the inner cavity. At the same time, when the air pressure plate 6 moves down, the top space increases to generate suction, and the input gas enters the cylinder shell 1 again through the one-way valve 8 to fill it saturated. When the air pressure plate 6 moves down and then rises, the gas at the top of the air pressure plate 6 is compressed, and under the influence of pressure, the gas passes through the one-way valve 2 9 to the bottom of the air pressure plate 6. This reciprocating process can speed up the gas filtration speed and improve the filtration efficiency.

[0045] Through the connection between the air pressure plate 6 and the cleaning mechanism 7, the cleaning mechanism 7 is also driven to rise and fall during the lifting process of the air pressure plate 6. During this process, the ring 72 is driven to rise and fall through a number of vertical rods 71, so that the brush 73 sweeps vertically along the side wall of the filter element 2, thereby achieving an automatic cleaning effect on the particles attached to the surface of the filter element 2, thereby preventing the filter element 2 from being blocked by too many attached particles.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. The present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A filter element assembly, characterized in that: It comprises a cylindrical shell (1), a filter element (2) is arranged inside the cylindrical shell (1), an air outlet chamber (3) connected to the filter element (2) is installed at the bottom of the cylindrical shell (1), and a lifting mechanism (4) is connected to the bottom of the air outlet chamber (3); The lifting mechanism (4) passes through the air outlet chamber (3) to the top of the filter element (2); the top of the output shaft of the lifting mechanism (4) is connected to a pressure plate (6) via a connecting piece (5); an air inlet opening is provided at the top of the cylinder shell (1); a one-way valve (8) is fixedly connected to the inner wall of the air inlet opening; a plurality of through-holes are provided at the top of the pressure plate (6); a two-way valve (9) is fixedly connected to each of the through-holes; and a cleaning mechanism (7) is fixedly connected to the bottom of the pressure plate (6); The cleaning mechanism (7) comprises a plurality of vertical rods (71), the bottoms of the plurality of vertical rods (71) are fixedly connected to collars (72), the inner wall of the collars (72) is fixedly connected to a brush (73), and the brush (73) surrounds the side wall of the filter element (2) and contacts the side wall of the filter element (2); Both sides of the collar (72) are fixedly connected with convex columns (74), and both sides of the inner wall of the cylinder shell (1) are provided with sliding grooves (10), and the two convex columns (74) are respectively slidably sleeved in the two sliding grooves (10); The slide groove (10) is in the shape of a spiral arc, and the number of spiral turns is one-half turn.

2. A filter element assembly according to claim 1, characterized in that: The lifting mechanism (4) comprises a bottom shell (41), an electric cylinder (42) is fixedly mounted on the inner wall of the bottom shell (41), the electric cylinder (42) penetrates to the top of the filter element (2), and the output shaft of the electric cylinder (42) is connected to the connecting element (5).

3. A filter element assembly according to claim 2, characterized in that: The filter element (2) comprises a fixed mesh cylinder (21), a main filter element (22) is fixedly mounted on the side wall of the fixed mesh cylinder (21), a fixed ring block (23) is arranged at the top of the inner cavity of the main filter element (22), the fixed ring block (23) is fixedly connected to the side wall of the electric cylinder (42), a pressure cover (24) is threadedly sleeved on the side wall of the fixed ring block (23), and the pressure cover (24) presses the top of the fixed mesh cylinder (21).

4. The filter element assembly of the filter according to claim 1, characterized in that: The connecting member (5) comprises a threaded ring cylinder (51), the inner cavity of the threaded ring cylinder (51) is movably sleeved with a round block (52), the side wall of the round block (52) is threadedly sleeved with a cover (53), the bottom of the cover (53) is provided with a through hole penetrating into the inner cavity of the threaded ring cylinder (51), the diameter of the through hole is smaller than the diameter of the round block (52), and the output end of the lifting mechanism (4) is connected to the cover (53) through the through hole at the bottom of the cover (53).

5. The filter element assembly of the filter according to claim 1, characterized in that: The air outlet chamber (3) comprises a main chamber body (31), a plug pipe (32) communicating with the interior is arranged on the top of the main chamber body (31), an internally threaded cylindrical wall (33) is arranged on the side wall of the main chamber body (31), the internally threaded cylindrical wall (33) is threadedly sleeved on the bottom of the side wall of the cylinder shell (1), an air outlet groove is arranged on the inner wall of the main chamber body (31), and the plug pipe (32) is inserted into the inner cavity of the filter element (2) and is tightly fitted with the inner wall of the filter element (2).

6. The filter element assembly of the filter according to claim 1, characterized in that: The structure of the one-way valve 2 (9) is the same as that of the one-way valve 1 (8), and the one-way valve 2 (9) comprises a valve housing (91), the inner wall of the valve housing (91) is fixedly connected to a column (93) via a fixing frame (92), a movable column (94) is slidably sleeved in the inner cavity of the column (93), the top end of the movable column (94) is transmission-connected to the top end of the inner wall of the column (93) via a tension spring (95), and the bottom end of the movable column (94) is fixedly connected to a truncated cone-shaped valve plug (96).

7. A filter element assembly according to claim 6, characterized in that: The movable column (94) is provided with a column groove inside, and a positioning block (98) is slidably sleeved in the column groove. The top of the movable column (94) is provided with a through hole, and the diameter of the through hole is smaller than the diameter of the positioning block (98). The top of the positioning block (98) is fixedly connected with a positioning column (97), and the positioning column (97) passes through the through hole and is fixedly connected to the top of the inner wall of the column tube (93).

8. The filter element assembly of the filter according to claim 1, characterized in that: The convex column (74) comprises a main column (741) and a ball (742); one end of the main column (741) is provided with a hemispherical groove; the ball (742) is movably sleeved in the hemispherical groove; and the ball (742) is embedded in the slide groove (10).

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