Filter for medicament production

Abstract

The utility model discloses a filter for medicament production, which relates to the field of filter devices and comprises a filter cavity, a plurality of filter holes are arranged on the bottom wall and the side wall of the filter cavity, the filter holes on the side wall of the filter cavity extend from the bottom to the top of the filter cavity, and the filter cavity is used for filtering medicament mixed liquor inside the filter cavity; the filtrate collecting cavity is arranged on the outer side of the filtering cavity and is used for collecting filtrate filtered by the filtering cavity; one end of the moving block is connected with the first driving piece, and the first driving piece is arranged to drive the moving block to move; the liquid level height of the medicine mixed liquid in the filtering cavity can be changed through displacement of the moving block; a liquid discharge valve is arranged on the filtrate collection cavity and is used for discharging filtrate. According to the utility model, the filtering cavity is arranged in the filtrate collecting cavity, and the filtering holes in the side wall of the filtering cavity extend from the bottom of the filtering cavity to the top of the filtering cavity, so that the aim of improving the filtering efficiency is fulfilled under the adjustment of the moving block.

Description

Technical Field

[0001] This utility model relates to the field of filtration devices, specifically to a filter for pharmaceutical production. Background Technology

[0002] Filtration is a crucial step in pharmaceutical production, primarily aimed at removing impurities and solid particles from the pharmaceutical solution to ensure its purity and quality. Currently, common pharmaceutical filtration devices include centrifuge filtration, sieve filtration systems, and traditional filter cloth or plate filtration. However, these traditional filtration devices present some technical challenges in practical applications.

[0003] For example, traditional pharmaceutical filtration devices typically employ a single filter chamber structure, with filter pores only distributed in the bottom or a portion of the sidewalls of the chamber. This structure makes the pores prone to clogging by impurities during filtration, thus reducing filtration efficiency. Furthermore, the installation and disassembly of filter screens in some devices are complex, making cleaning and replacement difficult, further impacting equipment maintenance efficiency. Additionally, in some cases, the structural design of the filtration device is flawed, failing to fully utilize the filtration area, resulting in slow filtration speeds that are insufficient to meet the needs of large-scale pharmaceutical production.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this utility model is to provide a filter for pharmaceutical production. This filter solves the problem of low filtration efficiency in the prior art by setting the filter chamber in the filtrate collection chamber and extending the filter holes on the side wall of the filter chamber from the bottom to the top, under the adjustment of the moving block.

[0006] This utility model embodiment is achieved through the following technical solution: This utility model embodiment provides a filter for pharmaceutical production, comprising:

[0007] The filter chamber has multiple filter holes on its bottom and side walls. The filter holes on the side walls of the filter chamber extend from its bottom to its top. The filter chamber is designed to filter the drug mixture inside it.

[0008] The filtrate collection chamber is located outside the filtration chamber and is used to collect the filtrate filtered by the filtration chamber.

[0009] A movable block, one end of which is connected to a first driving component, the first driving component being configured to drive the movable block to displacement;

[0010] The displacement of the moving block can change the liquid level of the drug mixture in the filtration chamber;

[0011] The filtrate collection chamber is equipped with a drain valve, which is designed to drain the filtrate.

[0012] Optionally, the upper end of the filtration chamber is open and a first end cap is provided on its top, and the upper end of the filtrate collection chamber is open and a second end cap is provided on its top.

[0013] The first end cap is provided with a first through hole, and the second end cap is provided with a second through hole. The first driving member can drive the moving block to move vertically within the first through hole and / or the second through hole.

[0014] There is a gap between the moving block and the inner wall of the filter chamber.

[0015] Optionally, an isolation chamber is provided in the filtrate collection chamber. The upper end of the isolation chamber is connected to the second end cap, and its bottom is movably abutting against the first end cap. The first driving member can drive the moving block to move vertically in the isolation chamber.

[0016] The isolation cavity is located between the first through hole and the second through hole, and its two ends are respectively connected to the first through hole and the second through hole;

[0017] A first sealing ring is provided at the bottom of the isolation chamber, which is used to isolate the filtrate collection chamber and the isolation chamber.

[0018] Optionally, a stepped structure extending toward the center is provided on the bottom wall of the first through hole, and a second sealing ring is provided on the inner wall of the first through hole, with the stepped structure configured to provide vertical support for the second sealing ring.

[0019] Optionally, it also includes a support platform, the bottom of the filtrate collection chamber is mounted on the support platform, a second driving component is also provided on the support platform, the second driving component is connected to the bottom of the filter chamber, and there is a gap between the bottom of the filter chamber and the support platform.

[0020] The second driving component is configured to drive the filter chamber to rotate within the filtrate collection chamber.

[0021] Optionally, the moving block includes an action part and a limiting part. The limiting part is located above the action part. The first driving member is connected to the upper part of the limiting part. The limiting part is located above the second through hole and is used to limit the height of the moving block's downward movement.

[0022] When the bottom of the limiting part is in contact with the second end cap, the bottom of the actuating part is in contact with the inner wall of the bottom of the filter chamber or there is a gap.

[0023] Optionally, when the bottom of the limiting part is in contact with the second end cap, there is a gap between the bottom of the actuating part and the inner wall of the bottom of the filter chamber;

[0024] The bottom of the working part is provided with several first brush members. Each brush member is configured to clear the bottom filter holes of the filter cavity when the filter cavity rotates and abuts against the bottom inner wall of the filter cavity.

[0025] Optionally, a plurality of second brush members are provided on the side wall of the working part, and each second brush member abuts against the inner side wall of the filter cavity.

[0026] Optionally, multiple second brush components are provided, and the height difference between the positions of each second brush component is greater than zero.

[0027] Optionally, when the second brush member located at the top abuts against the lower end of the first end cap, the height of the actuating part inside the filter cavity is less than one-third of the height of the filter cavity.

[0028] Compared with the prior art, the embodiments of this utility model have the following advantages and beneficial effects:

[0029] 1. This utility model provides a filter for pharmaceutical production. The filter chamber contains a drug mixture and filters it through filter holes on its bottom and side walls. The filter holes extend from the bottom to the top, increasing the filtration area. After the drug mixture enters the filter chamber, the filtrate flows out through the filter holes, while impurities are trapped inside the filter chamber. Because the filter holes are distributed across the entire range of the side and bottom walls, the filtration process is more uniform. In this utility model embodiment, a first driving member drives a moving block to move up and down, changing the liquid level in the filter chamber. When the liquid level rises, more filter holes are submerged, expanding the filtration area. When the filtrate in the filtrate collection chamber reaches a certain amount, the drain valve is opened, and the filtrate is discharged through the drain valve. This structure solves the problems of low filtration efficiency and insufficient filter hole utilization in the prior art.

[0030] 2. In this embodiment of the utility model, a first end cap is provided at the upper end of the filter chamber, and a second end cap is provided at the upper end of the filtrate collection chamber. A first through hole is provided on the first end cap, and a second through hole is provided on the second end cap. The movement of the moving block is guided by the first and second through holes to achieve the purpose of precisely adjusting the liquid level of the drug mixture in the filter chamber, thereby further improving the filtration efficiency.

[0031] 3. This embodiment of the invention, by setting an isolation chamber, can completely isolate the filtrate collection chamber from the moving block, preventing impurities adhering to the moving block from contaminating the filtrate in the filtrate collection chamber without affecting the filtration efficiency. By setting a stepped structure on the bottom wall of the first through hole to support the second sealing ring, the second sealing ring can prevent the Chinese herbal medicine mixture in the filtration chamber from leaking from the first through hole. The setting of the first sealing ring not only ensures the movable arrangement of the isolation chamber and the first end cap, but also improves the sealing performance between the filtrate collection chamber and the isolation chamber. The entire device is highly flexible and easy to disassemble.

[0032] 4. By setting a first brush and a second brush on the moving block, the filter holes on the filter chamber can be unblocked in multiple directions, thereby further improving the filtration efficiency.

[0033] In general, the pharmaceutical production filter provided by the embodiments of this utility model improves filtration efficiency by setting the filter chamber in the filtrate collection chamber and extending the filter holes on the side wall of the filter chamber from its bottom to its top, under the adjustment of the moving block. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the first operating state of the filter provided in this embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the filter's second operating state provided in an embodiment of this utility model;

[0037] Figure 3 for Figure 1 Enlarged view of the structure at point A in the middle;

[0038] Figure 4 A schematic diagram of the installation structure of the filter chamber, filtrate collection chamber and isolation chamber provided in the embodiment of this utility model;

[0039] Figure 5 This is a schematic diagram of the movable block structure provided in an embodiment of the present utility model.

[0040] The attached diagram shows the markings and corresponding component names:

[0041] 1-Filter chamber, 2-Filter hole, 3-Filtrate collection chamber, 4-Moving block, 5-First driving component, 6-Drain valve, 7-First end cap, 8-Second end cap, 9-First through hole, 10-Second through hole, 11-Isolation chamber, 12-First sealing ring, 13-Step structure, 14-Second sealing ring, 15-Support platform, 16-Second driving component, 17-Actuating part, 18-Limiting part, 19-First brush component, 20-Second brush component. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this utility model, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0046] Example

[0047] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a filter for pharmaceutical production, including: a filter chamber 1, a filtrate collection chamber 3, and a movable block 4. The filter chamber 1 is used to filter the drug mixture inside it. Multiple filter holes 2 are provided on its bottom wall and side wall. The filter holes 2 on the side wall of the filter chamber 1 extend from its bottom to its top, increasing the filtration area. The filtrate collection chamber 3 is located outside the filter chamber 1 and is used to collect the filtrate filtered by the filter chamber 1. Specifically, the filter chamber 1 is located inside the filtrate collection chamber 3, and the two are connected by filter holes 2. The filtrate flows into the filtrate collection chamber 3 through the filter holes 2. After the drug mixture enters the filter chamber 1, the filtrate flows out through the filter holes 2, while impurities are intercepted inside the filter chamber 1. Since the filter holes 2 are distributed over the entire range of the side wall and bottom wall, the filtration process is more uniform. The filtrate collection chamber 3 is provided with a drain valve 6. The filtrate flows from the filter chamber 1 into the filtrate collection chamber 3 through the filter holes 2 and is finally discharged through the drain valve 6. The drain valve 6 is installed at the bottom or side of the filtrate collection chamber 3. When the filtrate in the filtrate collection chamber 3 reaches a certain amount, the drain valve 6 is opened and the filtrate is discharged through the drain valve 6.

[0048] This embodiment of the invention also includes a movable block 4, one end of which is connected to a first driving member 5. The first driving member 5 is configured to drive the movable block 4 to move. The displacement of the movable block 4 can change the liquid level of the drug mixture in the filter chamber 1. Specifically, the first driving member 5 drives the movable block 4 to move up and down, changing the liquid level in the filter chamber 1. When the liquid level rises, more filter holes 2 are submerged, expanding the filtration area. When the liquid level falls, some filter holes 2 are exposed, reducing the risk of filter hole 2 clogging.

[0049] In this embodiment of the invention, by increasing the distribution area of ​​the filter holes 2 and optimizing the liquid level, more filter holes 2 can participate in filtration, further expanding the filtration area and reducing the risk of the filter holes 2 being clogged by impurities. It should be noted that the number and size of the filter holes 2 are not limited here; they can be set according to actual needs, as long as sufficient filtration requirements are met. The first driving component 5 can use existing driving technology, and there are no restrictions here. For example, it can be manually driven or driven by a cylinder. For ease of understanding, the first driving component 5 in this embodiment of the invention is driven by a motor, which improves the automation function of the device.

[0050] For example, such as Figure 4 As shown, the upper end of the filter chamber 1 is open and a first end cap 7 is provided on its top. The upper end of the filtrate collection chamber 3 is open and a second end cap 8 is provided on its top. A first through hole 9 is provided on the first end cap 7, and a second through hole 10 is provided on the second end cap 8. The first driving member 5 can drive the moving block 4 to move vertically within the first through hole 9 and / or the second through hole 10. There is a gap between the moving block 4 and the inner wall of the filter chamber 1.

[0051] Specifically, in this embodiment of the invention, the first end cap 7 is provided with a first through hole 9 for the vertical movement of the moving block 4. The moving block 4 moves vertically within the first through hole 9 of the first end cap 7, and there is a gap between it and the inner wall of the filter chamber 1. The second end cap 8 is provided with a second through hole 10, and the moving block 4 can also move vertically within the second through hole 10. The first end cap 7 and the second end cap 8 respectively cover the openings of the filter chamber 1 and the filtrate collection chamber 3 to ensure the sealing of the filtration process. To improve the flexibility of the device, the first end cap 7 and the second end cap 8 can be set as a detachable and flexible installation structure. During use, the filtrate flows from the filter chamber 1 into the filtrate collection chamber 3 through the filter hole 2, and the liquid level component in the filter chamber 1 decreases. At this time, the first driving member 5 can be driven to move the moving block 4 downward to increase the liquid level in the filter chamber 1. The filtrate in the filtrate collection chamber 3 is discharged through the drain valve 6. In this embodiment of the present invention, the first through hole 9 and the second through hole 10 provide channels for the vertical movement of the moving block 4, while ensuring the sealing of the filtration process and providing guidance for the vertical movement of the moving block 4, so as to improve the stability and accuracy of the device.

[0052] Furthermore, such as Figure 3 As shown, an isolation chamber 11 is provided inside the filtrate collection chamber 3. The upper end of the isolation chamber 11 is connected to the second end cap 8, and its bottom is in movable contact with the first end cap 7. The first driving member 5 can drive the moving block 4 to move vertically inside the isolation chamber 11. The isolation chamber 11 is located between the first through hole 9 and the second through hole 10, respectively. A first sealing ring 12 is provided at the bottom of the isolation chamber 11. The first sealing ring 12 is used to isolate the filtrate collection chamber 3 and the isolation chamber 11.

[0053] In detail, the isolation chamber 11 is used to accommodate the movable block 4 and provide a vertical movement channel for the movable block 4. At the same time, the isolation chamber 11 is isolated from the filtrate collection chamber 3 by the first sealing ring 12 to ensure that the filtrate does not enter the isolation chamber 11. The isolation chamber 11 provides a stable movement channel for the movable block 4. Since the isolation chamber 11 is movably abutted against the first end cap 7 rather than being connected, the installation flexibility of the isolation chamber 11 can be improved.

[0054] In a preferred embodiment of this utility model, a stepped structure 13 extending towards its center is provided on the bottom wall of the first through hole 9, and a second sealing ring 14 is provided on the inner wall of the first through hole 9. The stepped structure 13 is configured to provide vertical support for the second sealing ring 14. Specifically, the stepped structure 13 provides vertical support for the second sealing ring 14 through its protruding portion, preventing the sealing ring from shifting during the movement of the moving block 4. When the moving block 4 moves vertically within the first through hole 9, the second sealing ring 14 tightly fits against the outer wall of the moving block 4, ensuring the sealing between the moving block 4 and the first through hole 9, preventing filtrate leakage, further improving the sealing performance and reliability of the filter, and ensuring the high efficiency and stability of the filtration process.

[0055] Furthermore, it also includes a support platform 15, on which the bottom of the filtrate collection chamber 3 is mounted. A second driving member 16 is also provided on the support platform 15, connected to the bottom of the filter chamber 1, with a gap between the bottom of the filter chamber 1 and the support platform 15. The second driving member 16 is configured to drive the filter chamber 1 to rotate within the filtrate collection chamber 3. Specifically, the support platform 15 is used to mount and support the filtrate collection chamber 3 and provides a mounting base for the second driving member 16, ensuring stable rotation of the filter chamber 1. The second driving member 16 is used to drive the filter chamber 1 to rotate within the filtrate collection chamber 3, thereby improving filtration efficiency through rotational motion. The second driving component 16 is preferably a motor, which drives the filter chamber 1 to rotate within the filtrate collection chamber 3 through rotational motion. During rotation, the filtrate in the filter chamber 1 is subjected to centrifugal force, which makes the impurities more evenly distributed on the inner wall of the filter chamber 1, reducing the risk of clogging of the filter holes 2. At the same time, the rotational motion can also cause the impurities on the surface of the filter chamber 1 to be thrown off under the action of centrifugal force, achieving a certain self-cleaning effect. There is a gap between the bottom of the filter chamber 1 and the support platform 15 to avoid direct contact and reduce wear during rotation.

[0056] As a preferred embodiment of the present invention, as shown in Figure 5, the moving block 4 includes an action part 17 and a limiting part 18. The limiting part 18 is located above the action part 17. The first driving member 5 is connected to the upper part of the limiting part 18. The limiting part 18 is located above the second through hole 10 and is used to limit the height of the moving block 4 moving downward. When the bottom of the limiting part 18 is in contact with the second end cap 8, the bottom of the action part 17 is in contact with or has a gap with the inner wall of the bottom of the filter cavity 1.

[0057] Specifically, the bottom of the actuating part 17 contacts the liquid surface inside the filter chamber 1, and changes the liquid level inside the filter chamber 1 by moving up and down, directly interacting with the liquid inside the filter chamber 1. The limiting part 18 is located above the actuating part 17 and is used to limit the maximum downward movement of the moving block 4, preventing the moving block 4 from moving too far downward, which could cause the actuating part 17 to collide with or be damaged by the bottom of the filter chamber 1. The first driving member 5 is connected to the upper part of the limiting part 18, and the overall up and down movement of the moving block 4 is realized by driving the limiting part 18. This structure makes the movement range of the moving block 4 more precise, avoiding equipment failure or decreased filtration efficiency due to excessive movement.

[0058] More preferably, when the bottom of the limiting part 18 is in contact with the second end cap 8, there is a gap between the bottom of the actuating part 17 and the inner wall of the bottom of the filter chamber 1; the bottom of the actuating part 17 is provided with a plurality of first brush members 19, each brush member being configured to clear the bottom filter holes 2 of the filter chamber 1 when the filter chamber 1 rotates and abuts against the inner wall of the bottom of the filter chamber 1. When the filter chamber 1 rotates, the first brush members 19 abut against the inner wall of the bottom of the filter chamber 1, clearing the filter holes 2 through physical contact and preventing impurities from clogging the filter chamber 1. Even when the moving block 4 moves downward to its limit position, there is still a gap between the bottom of the actuating part 17 and the bottom of the filter chamber 1, avoiding direct collision while providing installation space for the first brush members 19. It should be noted that the first brush component 19 is preferably detachably connected to the working part 17, which can be connected by means of bonding, threading, etc., and there is no limitation here. At the same time, the number and layout of the first brush component 19 are also not limited here. They can be set according to actual needs, as long as they can achieve a sufficient unblocking effect.

[0059] Similarly, several second brush members 20 can be provided on the side wall of the working part 17. Each second brush member 20 abuts against the inner side wall of the filter chamber 1. The second brush member 20 cooperates with the first brush member 19 to clean the inner side wall and bottom filter hole 2 of the filter chamber 1 respectively, thereby optimizing the cleaning effect of the filter chamber 1, ensuring the unobstructed flow of the filter hole 2, and improving the filtration efficiency. When the moving block 4 moves up and down under the drive of the first driving member 5, the second brush member 20 is in close contact with the inner side wall of the filter chamber 1. The friction of the bristles cleans the impurities on the inner side wall. At the same time, during the rotation of the filter chamber 1, its side wall will also generate friction with the second brush member 20, further reducing the risk of filter hole 2 clogging.

[0060] In a preferred embodiment of this invention, multiple second brush members 20 are provided, with a height difference greater than zero between each second brush member 20. When the second brush member 20 at the top abuts against the lower end of the first end cap 7, the height of the working part 17 within the filter chamber 1 is less than one-third of the height of the filter chamber 1. This structure results in the second brush members 20 being distributed in a stepped manner on the side wall of the working part 17. This height difference ensures that during the up-and-down movement of the moving block 4 or the rotation of the filter chamber 1, the brush members can gradually clean impurities on the inner wall of the filter chamber 1, avoiding blind spots caused by overlapping brush member positions. When the second brush 20 at the top abuts against the lower end of the first end cap 7, it acts as a limit, preventing the moving block 4 from moving upwards. By limiting the height of the action part 17, it not only ensures that the action part 17 is positioned reasonably within the filter chamber 1 to ensure that the function of the action part 17 in accurately adjusting the liquid level is not affected, but also enables the first brush 19 and the second brush 20 to efficiently unclog the filter holes 2 and clean the inner wall.

[0061] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes are omitted to avoid unnecessarily limiting the utility model.

Claims

1. A filter for pharmaceutical production, characterized in that, The utility model relates to a filter cavity (1) is provided with a plurality of filter holes (2) on the bottom wall and the side wall, the filter hole (2) of the side wall of filter cavity (1) is arranged from the bottom to the top, and the filter cavity (1) is arranged to filter the medicine mixed solution in it. The filtrate collecting cavity (3) is arranged outside the filter cavity (1) and is used for collecting the filtrate filtered by the filter cavity (1). The mobile block (4) is connected with a first driving member (5) at one end, and the first driving member (5) is arranged to drive the displacement of the mobile block (4). The displacement of the mobile block (4) can change the liquid level of the medicine mixed solution in the filter cavity (1). The filtrate collecting cavity (3) is provided with a drainage valve (6), and the drainage valve (6) is arranged to discharge the filtrate. The filter cavity (1) is open at the upper end, and a first end cover (7) is arranged at the top of the filter cavity (1); the filtrate collecting cavity (3) is open at the upper end, and a second end cover (8) is arranged at the top of the filtrate collecting cavity (3).

2. The filter for pharmaceutical production according to claim 1, characterized in that, The first end cover (7) is provided with a first through hole (9), and the second end cover (8) is provided with a second through hole (10); the first driving member (5) can drive the vertical movement of the mobile block (4) in the first through hole (9) and / or the second through hole (10). There is a gap between the mobile block (4) and the inner side wall of the filter cavity (1). The filtrate collecting cavity (3) is provided with an isolation cavity (11), the upper end of the isolation cavity (11) is connected with the second end cover (8), the bottom of the isolation cavity (11) is movably abutted with the first end cover (7), and the first driving member (5) can drive the vertical movement of the mobile block (4) in the isolation cavity (11).

3. The filter for pharmaceutical production according to claim 2, characterized in that, The isolation cavity (11) is located between the first through hole (9) and the second through hole (10), and the two ends of the isolation cavity (11) are respectively communicated with the first through hole (9) and the second through hole (10). The bottom of the isolation cavity (11) is provided with a first sealing ring (12), and the first sealing ring (12) is arranged to isolate the filtrate collecting cavity (3) and the isolation cavity (11). The bottom wall of the first through hole (9) is provided with a stepped structure (13) extending to the center, and the inner wall of the first through hole (9) is provided with a second sealing ring (14); the stepped structure (13) is arranged to vertically support the second sealing ring (14).

4. The filter for pharmaceutical production according to claim 3, characterized in that, The utility model further comprises a support table (15), the bottom of the filtrate collecting cavity (3) is mounted on the support table (15), the support table (15) is further provided with a second driving member (16), the second driving member (16) is connected with the bottom of the filter cavity (1), and there is a gap between the bottom of the filter cavity (1) and the support table (15).

5. A filter for pharmaceutical production according to any one of claims 2-4, characterised in that The second driving member (16) is arranged to drive the rotation of the filter cavity (1) in the filtrate collecting cavity (3). ​ 6. The filter for pharmaceutical production according to claim 2, wherein The moving block (4) comprises an acting part (17) and a limiting part (18), the limiting part (18) is above the acting part (17), the first driving part (5) is connected with the top of the limiting part (18), the limiting part (18) is above the second through hole (10), and is used for limiting the height of the downward movement of the moving block (4); When the bottom of the limiting part (18) is attached to the second end cover (8), the bottom of the acting part (17) is in contact with or has a gap with the inner wall of the bottom of the filter cavity (1).

7. A filter for pharmaceutical production according to claim 6, characterized in that When the bottom of the limiting part (18) is attached to the second end cover (8), the bottom of the acting part (17) has a gap with the inner wall of the bottom of the filter cavity (1); The bottom of the acting part (17) is provided with a plurality of first brush parts (19), and each of the brush parts is arranged to clear the filter hole (2) of the bottom of the filter cavity (1) when the filter cavity (1) rotates and abuts against the inner wall of the bottom of the filter cavity (1).

8. A filter for pharmaceutical production according to claim 6 or 7, characterized in that A plurality of second brush parts (20) are arranged on the side wall of the acting part (17), and each of the second brush parts (20) abuts against the inner wall of the filter cavity (1).

9. The filter for pharmaceutical production according to claim 8, characterized in that, Each of the second brush parts (20) is arranged at a position with a height difference greater than zero.

10. The filter for pharmaceutical production according to claim 9, characterized in that, When the top second brush part (20) abuts against the lower end of the first end cover (7), the height of the acting part (17) in the filter cavity (1) is less than one third of the height of the filter cavity (1). When the bottom of the limiting part (18) is attached to the second end cover (8), the bottom of the acting part (17) is in contact with or has a gap with the inner wall of the bottom of the filter cavity (1). When the bottom of the limiting part (18) is attached to the second end cover (8), the bottom of the acting part (17) has a gap with the inner wall of the bottom of the filter cavity (1); The bottom of the acting part (17) is provided with a plurality of first brush parts (19), and each of the brush parts is arranged to clear the filter hole (2) of the bottom of the filter cavity (1) when the filter cavity (1) rotates and abuts against the inner wall of the bottom of the filter cavity (1). A plurality of second brush parts (20) are arranged on the side wall of the acting part (17), and each of the second brush parts (20) abuts against the inner wall of the filter cavity (1). Each of the second brush parts (20) is arranged at a position with a height difference greater than zero. When the top second brush part (20) abuts against the lower end of the first end cover (7), the height of the acting part (17) in the filter cavity (1) is less than one third of the height of the filter cavity (1).

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