A dual-channel filter filling device for beer production

Abstract

This application relates to the technical field of beer production equipment, specifically a dual-channel filtration and filling device for beer production. By installing a pressure mechanism on the filter box, a motor drives a cam to rotate during beer filtration. As the cam rotates, a connecting rod moves a slider up and down within a groove. Simultaneously, the slider moves a sliding rod up and down, achieving intermittent pressure from the pressure plate. This pressure applies pressure to the beer in the filter box located above the filtration mechanism, accelerating the beer's passage through the coarse and fine filters, resulting in faster filtration. Furthermore, by installing a leveling component on the lower side of the filling branch pipe in the filling mechanism, the leveling hood within the component ensures that the beer sprayed through the constriction tube is evenly distributed on the inner wall of the empty bottle during filling after filtration, reducing the impact of the beer on the empty bottle and thus minimizing bubble formation.

Description

Technical Field

[0001] This application relates to the field of beer production equipment technology, and in particular to a dual-channel filter filling device for beer production. Background Technology

[0002] In the beer production process, after the beer fermentation is completed, it needs to be bottled and filled to ensure that the beer can be put on the market for people to drink. Before bottling and filling, the beer also needs to be filtered to improve the transparency of the beer and reduce the impact of impurities on the taste of the beer.

[0003] The existing dual-channel filtration and filling device for beer production mainly consists of a filling platform, a filling tank installed in the middle of the filling platform, a filling mechanism installed at the bottom of the filling tank, a dual-channel filtration mechanism installed at the top of the filling tank, and a conveying mechanism installed on the filling platform below the filling mechanism. When filling beer, the fermented beer is first filtered through the coarse and fine filters in the filtration mechanism. Then, the filtered beer is temporarily stored in the filling tank. Finally, it is filled into empty bottles conveyed by the conveying mechanism through the filling pipe on the filling mechanism.

[0004] While existing dual-channel filtration and filling devices for beer production can achieve filtration, bottling, and filling of beer, they have several drawbacks. First, during the filtration and filling process, a significant amount of impurities accumulate on the filter screen within the filter chamber. These impurities reduce the mesh size of the filter screen, slowing down the filtration speed and resulting in a slow overall filtration, bottling, and filling process with low efficiency. Second, when filling beer directly into empty bottles using a filling tube, the speed at which the beer is sprayed into the bottle can easily cause excessive foaming during filling, thus degrading the taste of the beer after bottling. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a dual-channel filtration and filling device for beer production. This device can both apply pressure during filtration to increase the filtration speed and ensure the overall filtration, filling, and packing efficiency of the beer, and ensure that the beer flows down the inner wall of the empty bottle in a uniform manner during filling, reducing the impact of the beer on the empty bottle. This reduces the generation of foam during filling and packing, resulting in better beer quality after filling.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A dual-channel filtration and filling device for beer production includes a filling platform. An inverted L-shaped support plate is welded to one side of the top of the filling platform. A liquid storage tank is attached to one side of the support plate. A filling mechanism is installed on the support plate next to the liquid storage tank. The filling mechanism includes a filling pump, a guide column, a second electric telescopic rod, a main filling pipe, and a branch filling pipe. A leveling assembly is also installed at the bottom of the branch filling pipe. The leveling assembly includes a constricted tube, a connecting column, and a leveling cover. Two outlet pipes are symmetrically welded to the top of the liquid storage tank. Each outlet pipe is connected to a filter box at its top. A dual-channel inlet pipe is installed between the two filter boxes. A filtration mechanism is installed on the lower side inside the filter box. The filtration mechanism includes a mounting frame, a coarse filter screen, a fine filter screen, a mounting plate, a first electric telescopic rod, and a sealing strip. A pressure applying mechanism is installed at the top of the filter box. The pressure applying mechanism includes a sliding sleeve, a connecting rod, a cam, a first motor, a slider, a groove, a vertical plate, a sliding rod, and a pressure plate.

[0008] Optionally, a one-way inlet valve is also installed on the dual-channel inlet pipe at the connection point with each of the filter boxes, and the inlet of the filter box is higher than the filtration mechanism.

[0009] Optionally, a conveying mechanism is installed in the middle of the filling platform. The conveying mechanism includes a support roller, a motor, and a conveyor belt. An H-shaped support leg is also welded to each side of the bottom end of the filling platform.

[0010] Optionally, the support roller is rotatably mounted on the filling platform, the conveyor belt is sleeved on the outside of the support roller, and the second motor is mounted on one side wall of the filling platform, directly opposite the support roller at one end of the conveyor belt.

[0011] Optionally, the filling pump is installed on one side of the top of the support plate, the electric telescopic rod II is installed at the bottom of the support plate directly opposite the filling pump, the main filling pipe is connected to the telescopic part of the electric telescopic rod II, the filling branch pipe is installed at the bottom of the main filling pipe, the filling branch pipe has a filling valve, there are two guide posts, the two guide posts are symmetrically installed on both sides of the top of the main filling pipe, the guide posts penetrate the support plate and slide with the support plate.

[0012] Optionally, the constricted tube is formed at the bottom end of the filling branch pipe and communicates with the inside of the filling branch pipe, the connecting post is installed in a ring at the bottom end of the filling branch pipe, and the material leveling cover is connected to the bottom end of the connecting post.

[0013] Optionally, the mounting frame is slidably installed inside the filter box, and the sealing strip is installed at both the top and bottom of the mounting frame. The coarse filter screen is installed in the upper part of the mounting frame, and the fine filter screen is installed in the lower part of the mounting frame. The mounting plate is welded to the lower part of the outer side wall of the filter box. The electric telescopic rod is installed between the mounting plate and the mounting frame, and the telescopic part of the electric telescopic rod is bolted to the mounting frame.

[0014] Optionally, the sliding sleeve is welded to the middle of the top of the filter box, the sliding rod is slidably installed in the sliding sleeve, the pressure plate is connected to the bottom end of the sliding rod and the pressure plate is located inside the filter box, and the slider is welded to the middle of one side wall of the sliding rod.

[0015] Optionally, the groove is formed on the sliding sleeve at the part that mates with the slider, the slider slides in the groove, the slider is rotatably connected to the connecting rod on the side wall opposite to the sliding rod, the connecting rod is rotatably connected to the cam at the end opposite to the slider, a vertical plate is provided on one side of the cam and welded and fixed to the filter box, the motor is installed on the vertical plate facing the lower side of the cam, and the motor is connected to the cam coupling.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] This invention utilizes a pressure mechanism installed on a filter box, consisting of a sliding sleeve, connecting rod, cam, motor, slider, groove, upright plate, slide bar, and pressure plate. During beer filtration, the motor drives the cam to rotate, which in turn drives the slider to move up and down within the groove via the connecting rod. Simultaneously, the slider moves the slide bar up and down, resulting in intermittent downward pressure from the pressure plate. This pressure plate applies pressure to the beer in the filter box located above the filtration mechanism, thereby accelerating the speed at which the beer passes through the coarse and fine filter screens. This results in faster beer filtration and prevents impurities from being trapped on the coarse and fine filter screens, which would reduce the filter pore area and improve the efficiency of beer filtration, filling, and dispensing.

[0018] This invention utilizes a material leveling assembly, consisting of a constriction tube, a connecting column, and a material leveling hood, installed on the lower side of the filling branch pipe in the filling mechanism. This assembly allows the constriction tube to penetrate deep into the empty bottle during the bottling process after beer filtration. Simultaneously, the material leveling hood helps to evenly distribute the beer sprayed through the constriction tube onto the inner wall of the empty bottle, reducing the impact between the beer and the empty bottle, thereby reducing the generation of bubbles and improving the quality of the beer after filling. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure provided in the embodiments of this application;

[0020] Figure 2 This is a left sectional view of the filter box provided in the embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the installation frame, coarse filter screen, and sealing strip provided in the embodiments of this application;

[0022] Figure 4 This is provided by the embodiments of this application. Figure 1 Enlarged view of point A in the middle;

[0023] Figure 5 This is provided by the embodiments of this application. Figure 1 Enlarged view of point B in the middle.

[0024] Explanation of reference numerals in the attached drawings: 1. Dual-channel inlet pipe; 2. Filter box; 3. Support plate; 4. Filling platform; 5. Support leg; 6. Conveying mechanism; 61. Support roller; 62. Motor II; 63. Conveyor belt; 7. Filling mechanism; 71. Filling pump; 72. Guide column; 73. Electric telescopic rod II; 74. Main filling pipe; 75. Filling branch pipe; 8. Pressing mechanism; 81. Sliding sleeve; 82. Connecting rod; 83. Cam; 84. Motor I; 85. Groove; 86. Vertical plate; 87. Sliding rod; 88. Pressure plate; 89. Sliding block; 9. Filtering mechanism; 91. Mounting frame; 92. Coarse filter screen; 93. Fine filter screen; 94. Mounting plate; 95. Electric telescopic rod I; 96. Sealing strip; 10. Material leveling assembly; 101. Narrowing tube; 102. Connecting column; 103. Material leveling cover; 11. Storage tank; 12. Outlet pipe. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] To better understand the technical solutions presented in the embodiments of this application, the structure and working principle of the existing dual-channel filtration and filling device for beer production will be introduced first.

[0027] The existing dual-channel filtration and filling device for beer production mainly consists of a filling platform, a filling tank installed in the middle of the filling platform, a filling mechanism installed at the bottom of the filling tank, a dual-channel filtration mechanism installed at the top of the filling tank, and a conveying mechanism installed on the filling platform below the filling mechanism. When filling beer, the fermented beer is first filtered through the coarse and fine filters in the filtration mechanism. Then, the filtered beer is temporarily stored in the filling tank. Finally, it is filled into empty bottles conveyed by the conveying mechanism through the filling pipe on the filling mechanism.

[0028] Please see Figure 1 , Figure 2 , Figure 4 and Figure 5This application discloses a dual-channel filtration and filling device for beer production, comprising a filling platform 4. An inverted L-shaped support plate 3 is welded to one side of the top of the filling platform 4. A liquid storage tank 11 is mounted on one side of the support plate 3. A filling mechanism 7 is installed on the support plate 3, located on one side of the liquid storage tank 11. The filling mechanism 7 includes a filling pump 71, a guide column 72, an electric telescopic rod 73, a main filling pipe 74, and a filling branch pipe 75. A leveling assembly 10 is also installed at the bottom of the filling branch pipe 75. The leveling assembly 10 includes a constriction tube 101, a connecting column 102, and a leveling cover 103. Two liquid outlet pipes 12 are symmetrically welded to the top of the box 11. Each liquid outlet pipe 12 is connected to a filter box 2 at its top. A dual-channel liquid inlet pipe 1 is installed between the two filter boxes 2. A filter mechanism 9 is installed on the lower side inside the filter box 2. The filter mechanism 9 includes a mounting frame 91, a coarse filter screen 92, a fine filter screen 93, a mounting plate 94, an electric telescopic rod 95, and a sealing strip 96. A pressure applying mechanism 8 is installed at the top of the filter box 2. The pressure applying mechanism 8 includes a sliding sleeve 81, a connecting rod 82, a cam 83, a motor 84, a slider 89, a groove 85, a vertical plate 86, a sliding rod 87, and a pressure plate 88.

[0029] Specifically, during the filtration process, to ensure the filtration speed of the beer, the cam 83 is first rotated by the motor 84. After the cam 83 rotates, it drives the slider 89 to move up and down in the groove 85 through the connecting rod 82. While the slider 89 is moving, the sliding rod 87 moves up and down synchronously, thereby realizing the intermittent downward pressure of the pressure plate 88. While the pressure plate 88 is pressing down, it applies pressure to the beer located on the upper side of the filtration mechanism 9 in the filter box 2, thereby accelerating the speed at which the beer passes through the coarse filter screen 92 and the fine filter screen 93 in the filtration mechanism 9, making the beer filtration speed faster. When filling the filtered beer into the empty bottle, the constriction tube 101 is inserted into the empty bottle. At the same time, the uniform coating hood 103 is used to evenly spread the beer sprayed through the constriction tube 101 on the inner wall of the empty bottle, reducing the impact between the beer and the empty bottle, thereby reducing the generation of bubbles and making the beer of better quality after filling.

[0030] Please see Figure 1 A one-way inlet valve is also installed on the part of the dual-channel inlet pipe 1 that connects to each filter box 2. The inlet of the filter box 2 is higher than the filter mechanism 9.

[0031] As one implementation method, controlling the opening and closing of the one-way inlet valve on the dual-channel inlet pipe 1 can control the on-demand flow of beer into the two filter boxes 2. That is, when filtering beer before bottling, both filter boxes 2 can be used simultaneously to ensure the filtration speed of the beer; or one filter box 2 can be used while the other filter box 2 is not used, so that the other filter box 2 can continue to be used for filtration when the filtration mechanism 9 in one filter box 2 is cleaned and maintained.

[0032] Please see Figure 1 A conveying mechanism 6 is installed in the middle of the filling platform 4. The conveying mechanism 6 includes a support roller 61, a motor 62, and a conveyor belt 63. An H-shaped support leg 5 is also welded to each side of the bottom end of the filling platform 4.

[0033] As one implementation method, the support leg 5 can be used to ensure the stable placement of the filling platform 4.

[0034] Please see Figure 1 The support roller 61 is rotatably mounted on the filling platform 4, the conveyor belt 63 is sleeved on the outside of the support roller 61, and the motor 62 is mounted on one side wall of the filling platform 4, directly opposite the support roller 61 at one end of the conveyor belt 63.

[0035] In one implementation, motor 62 is mainly used to provide power to the corresponding support roller 61 so that the support roller 61 rotates and drives the conveyor belt 63 to rotate, thereby realizing the transfer of empty beer bottles for filling.

[0036] Please see Figure 1 The filling pump 71 is installed on one side of the top of the support plate 3. The electric telescopic rod 73 is installed at the bottom of the support plate 3, directly opposite the filling pump 71. The filling main pipe 74 is connected to the telescopic part of the electric telescopic rod 73. The filling branch pipe 75 is installed at the bottom of the filling main pipe 74. The filling branch pipe 75 is equipped with a filling valve. There are two guide posts 72. The two guide posts 72 are symmetrically installed on both sides of the top of the filling main pipe 74. The guide posts 72 penetrate the support plate 3 and slide with the support plate 3.

[0037] In one implementation, during filling, the filling main pipe 74 and filling branch pipe 75 are first lowered by the action of the electric telescopic rod 73 until the filling component in the filling branch pipe 75 extends into the empty bottle. Then, the beer filtered in the storage tank 11 is filled into the empty bottle through the filling main pipe 74 and filling branch pipe 75 by the action of the filling pump 71.

[0038] Please see Figure 1 and Figure 5 The constricted tube 101 is formed at the bottom end of the filling branch pipe 75 and communicates with the inside of the filling branch pipe. The connecting column 102 is installed in a ring at the bottom end of the filling branch pipe 75, and the bottom end of the connecting column 102 is connected to the material leveling cover 103.

[0039] In one implementation, when the beer is delivered to the filling branch pipe 75 during filling, the beer will be sprayed into the uniform hood 103 through the constriction pipe 101. When the beer passes through the uniform hood 103, it will spread onto the inner wall of the empty bottle, thereby reducing the impact between the beer and the inner wall of the empty bottle and reducing the generation of bubbles.

[0040] Please see Figures 1-3The mounting frame 91 is slidably installed inside the filter box 2. Sealing strips 96 are installed at the top and bottom of the mounting frame 91. The coarse filter screen 92 is installed in the upper part of the mounting frame 91, and the fine filter screen 93 is installed in the lower part of the mounting frame 91. The mounting plate 94 is welded to the lower part of the outer side wall of the filter box 2. The electric telescopic rod 95 is installed between the mounting plate 94 and the mounting frame 91. The telescopic part of the electric telescopic rod 95 is bolted to the mounting frame 91.

[0041] As one implementation, the sealing strip 96 ensures the sealing of the mounting frame 91 after it is inserted into the filter box 2. When the beer passes through the coarse filter 92, large particulate matter in the beer is filtered out first, while when the beer passes through the fine filter 93, small impurities in the beer are filtered out. With the help of the electric telescopic rod 95, the mounting frame 91 can be easily pushed out of the filter box 2 for cleaning and maintenance, so as to clean the coarse filter 92 and the fine filter 93.

[0042] Please see Figure 1 , Figure 2 and Figure 4 The sliding sleeve 81 is welded to the middle of the top of the filter box 2. The sliding rod 87 is slidably installed in the sliding sleeve 81. The pressure plate 88 is connected to the bottom of the sliding rod 87 and is located inside the filter box 2. The slider 89 is welded to the middle of one side wall of the sliding rod 87.

[0043] In one implementation, the sliding sleeve 81 is mainly used to guide the up and down sliding of the sliding rod 87. The pressure plate 88 is slidably and sealed with the inner wall of the filter box 2 to ensure that the external air does not come into contact with the beer in the filter box 2 when the pressure plate 88 slides up and down in the filter box 2.

[0044] Please see Figure 1 , Figure 2 and Figure 4 The groove 85 is formed on the sliding sleeve 81 and mates with the slider 89. The slider 89 slides with the groove 85. The slider 89 is rotatably connected to the side wall of the sliding rod 87. The end of the connecting rod 82 that is rotatably connected to the slider 89 is connected to the cam 83. A vertical plate 86 that is welded and fixed to the filter box 2 is provided on one side of the cam 83. A motor 84 is installed on the vertical plate 86 directly opposite the lower side of the cam 83. The motor 84 is connected to the cam 83 by a coupling.

[0045] In one implementation, motor 84 is mainly used to provide power for the rotation of cam 83. After cam 83 rotates, it will use connecting rod 82 to make slider 89 move up and down along groove 85. While slider 89 is moving, it will drive slide rod 87 to move up and down synchronously along slide sleeve 81. Thus, the slide rod 87 is used to realize the intermittent up and down movement of pressure plate 88, so as to realize the intermittent pressure on beer in filter box 2 and speed up the filtration speed of beer.

[0046] The specific working principle is as follows: First, connect the dual-channel inlet pipe 1 to the external fermented beer storage tank. Then, open the corresponding one-way inlet valve on the dual-channel inlet pipe 1 to allow the beer to be filtered to enter the filter box 2. After entering the filter box 2, the beer will be filtered through the coarse filter screen 92 and the fine filter screen 93. The filtered beer will be temporarily stored in the storage tank 11. During filling, the filling main pipe 74 and the filling branch pipe 75 are lowered by the electric telescopic rod 73 until the filling component in the filling branch pipe 75 extends into the empty bottle. Then, the beer filtered in the storage tank 11 is filled into the empty bottle conveyed by the conveying mechanism 6 through the filling main pipe 74 and the filling branch pipe 75 by the filling pump 71. During the filtration and filling process, the cam 83 is rotated by the motor 84. When the cam 83 rotates, it can be filled with the help of the connecting rod. 82 drives slider 89 to move up and down within groove 85. As slider 89 moves, it causes slider 87 to move up and down synchronously, thereby intermittently pressing down pressure plate 88. While pressing down, pressure plate 88 applies pressure to the beer in filter box 2 located above filter mechanism 9, thereby accelerating the speed at which the beer passes through coarse filter screen 92 and fine filter screen 93 in filter mechanism 9, making the beer filter faster and preventing impurities in the beer from being trapped on coarse filter screen 92 and fine filter screen 93, which would reduce the filter hole area and make the beer filtration and filling efficiency higher. At the same time, when filling the beer after filtration, the constriction tube 101 is inserted into the empty bottle, and the uniform coating 103 is used to evenly spread the beer sprayed through the constriction tube 101 on the inner wall of the empty bottle, reducing the impact between the beer and the empty bottle, thereby reducing the generation of bubbles and making the beer of better quality after filling.

[0047] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual pass filter filler apparatus for beer production, characterised in that: The system includes a filling platform (4), on one side of which is welded an inverted L-shaped support plate (3). A storage tank (11) is located on one side of the support plate (3). A filling mechanism (7) is installed on one side of the storage tank (11) on the support plate (3). The filling mechanism (7) includes a filling pump (71), a guide column (72), an electric telescopic rod (73), a main filling pipe (74), and a filling branch pipe (75). A leveling assembly (10) is also installed at the bottom of the filling branch pipe (75). The leveling assembly (10) includes a constriction tube (101), a connecting column (102), and a leveling cover (103). Two outlet pipes are symmetrically welded on both sides of the top of the storage tank (11). 12), each of the outlet pipes (12) is connected to a filter box (2) at the top. A dual-channel inlet pipe (1) is installed between the two filter boxes (2). A filter mechanism (9) is installed on the lower side of the filter box (2). The filter mechanism (9) includes a mounting frame (91), a coarse filter screen (92), a fine filter screen (93), a mounting plate (94), an electric telescopic rod (95), and a sealing strip (96). A pressure applying mechanism (8) is installed at the top of the filter box (2). The pressure applying mechanism (8) includes a sliding sleeve (81), a connecting rod (82), a cam (83), a motor (84), a slider (89), a groove (85), a vertical plate (86), a sliding rod (87), and a pressure plate (88).

2. The dual-channel filtration and filling device for beer production according to claim 1, characterized in that: A one-way inlet valve is also installed on the dual-channel inlet pipe (1) at the part that connects with each of the filter boxes (2), and the inlet of the filter box (2) is higher than the filter mechanism (9).

3. The dual-channel filtration and filling device for beer production according to claim 1, characterized in that: The filling platform (4) is equipped with a conveying mechanism (6) in the middle. The conveying mechanism (6) includes a support roller (61), a motor (62) and a conveyor belt (63). An H-shaped support leg (5) is also welded to each side of the bottom end of the filling platform (4).

4. The dual-channel filtration and filling device for beer production according to claim 3, characterized in that: The support roller (61) is rotatably mounted on the filling platform (4), the conveyor belt (63) is sleeved on the outside of the support roller (61), and the motor (62) is mounted on one side wall of the filling platform (4) at the support roller (61) directly opposite one end of the conveyor belt (63).

5. The dual-channel filtration and filling device for beer production according to claim 1, characterized in that: The filling pump (71) is installed on one side of the top of the support plate (3). The electric telescopic rod two (73) is installed at the bottom of the support plate (3) directly opposite the filling pump (71). The filling main pipe (74) is connected to the telescopic part of the electric telescopic rod two (73). The filling branch pipe (75) is installed at the bottom of the filling main pipe (74). The filling branch pipe (75) has a filling valve. There are two guide columns (72). The two guide columns (72) are symmetrically installed on both sides of the top of the filling main pipe (74). The guide columns (72) penetrate the support plate (3) and slide with the support plate (3).

6. The dual-channel filtration and filling device for beer production according to claim 1, characterized in that: The constricted tube (101) is formed at the bottom end of the filling branch pipe (75) and communicates with the inside of the filling branch pipe. The connecting column (102) is installed in a ring at the bottom end of the filling branch pipe (75). The bottom end of the connecting column (102) is connected to the material leveling cover (103).

7. A dual-channel filtration and filling device for beer production according to claim 1, characterized in that: The mounting frame (91) is slidably installed inside the filter box (2). The top and bottom of the mounting frame (91) are equipped with sealing strips (96). The coarse filter screen (92) is installed in the upper part of the mounting frame (91). The fine filter screen (93) is installed in the lower part of the mounting frame (91). The mounting plate (94) is welded to the lower part of the outer side wall of the filter box (2). The electric telescopic rod (95) is installed between the mounting plate (94) and the mounting frame (91). The telescopic part of the electric telescopic rod (95) is bolted to the mounting frame (91).

8. A dual-channel filtration and filling device for beer production according to claim 1, characterized in that: The sliding sleeve (81) is welded to the middle of the top of the filter box (2), the sliding rod (87) is slidably installed in the sliding sleeve (81), the pressure plate (88) is connected to the bottom of the sliding rod (87), and the pressure plate (88) is located inside the filter box (2), and the slider (89) is welded to the middle of one side wall of the sliding rod (87).

9. A dual-channel filtration and filling device for beer production according to claim 8, characterized in that: The groove (85) is formed on the sliding sleeve (81) and engages with the slider (89). The slider (89) is slidably engaged with the groove (85). The slider (89) is rotatably connected to the connecting rod (82) on the side wall of the sliding rod (87) away from the slider (89). The connecting rod (82) is rotatably connected to the cam (83) at the end away from the slider (89). A vertical plate (86) is provided on one side of the cam (83) and welded and fixed to the filter box (2). The motor (84) is installed on the vertical plate (86) directly opposite the lower side of the cam (83). The motor (84) is connected to the cam (83) by a coupling.

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