Drug intermediate filtering device

Abstract

The utility model discloses a medicine intermediate filtering device which comprises an outer cylinder and a filtering cylinder core, a cylinder cover is arranged on the outer cylinder, the outer cylinder and the filtering cylinder core are coaxially connected in a sleeved mode, a movable ring is arranged between the outer cylinder and the filtering cylinder core, the inner ring of the movable ring is attached to the outer wall of the filtering cylinder core, the outer ring of the movable ring is attached to the inner wall of the outer cylinder, and the outer ring of the movable ring is connected with the inner wall of the outer cylinder. A screw rod is rotationally connected to the movable ring, the screw rod penetrates through the barrel cover and is in threaded connection with the barrel cover, a feeding pipe is further installed on the barrel cover in a penetrating mode, a discharging pipe is connected to the lower portion of an opening in the center of a bottom plate of the outer barrel, and a blow-off pipe is further connected to the outer side wall of the outer barrel. When the screw rod is twisted, the movable ring can be driven to slide up and down between the outer cylinder and the filter cylinder core, so that impurities on the inner wall of the outer cylinder and the outer wall of the filter cylinder core are scraped off, the cleaning step is more convenient and easy to operate, and when the movable ring moves downwards, liquid to be filtered between the outer cylinder and the filter cylinder core can be pressurized, so that the filtering effect is improved. Therefore, the filtering efficiency is improved.

Description

A drug intermediate filtration device Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a drug intermediate filtration device. Background Technology

[0002] Pharmaceutical intermediates are actually chemical raw materials or products used in the process of drug synthesis. They are fine chemical products in the production process from pharmaceutical chemical raw materials to active pharmaceutical ingredients or drugs. In the processing of pharmaceutical intermediates, the first step is to go through a filtration process to filter out excess impurities in the raw materials, so as to facilitate further processing.

[0003] In order to ensure the filtration effect, existing drug intermediate filtration devices require regular cleaning of the internal filter screen to prevent clogging. However, the current cleaning process usually involves disassembling the device, taking out the filter screen for rinsing, and then reinstalling it. This cleaning process is cumbersome and makes it difficult to achieve the cleaning effect within the device itself.

[0004] To address this issue, we propose a drug intermediate filtration device. Summary of the Invention

[0005] The purpose of this invention is to provide a drug intermediate filtration device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pharmaceutical intermediate filtration device includes an outer cylinder and a filter core. The outer cylinder is provided with a cylinder cover, and the outer cylinder and the filter core are coaxially sleeved. A movable ring is provided between the outer cylinder and the filter core. The inner ring of the movable ring is in contact with the outer wall of the filter core, and the outer ring of the movable ring is in contact with the inner wall of the outer cylinder. A screw is rotatably connected to the movable ring, and the screw passes through the cylinder cover and is threadedly connected to it. A feed pipe is also installed through the cylinder cover and extends below the movable ring. A discharge pipe is connected to the center opening of the bottom plate of the outer cylinder, and a control valve is installed in the middle section of the discharge pipe. A drain pipe is also connected to the outer side wall of the outer cylinder, and a control valve is installed in the middle section of the drain pipe.

[0008] In a further embodiment, the filter core is provided with a connecting cover, which is threadedly connected to the cylinder cover, and a sealing ring is embedded on the upper end face of the threaded interface of the cylinder cover.

[0009] In a further embodiment, the connecting cover has an opening at its center, into which a rubber plug is inserted, and the outer side wall of the rubber plug has a protrusion that engages with the inner side wall of the opening.

[0010] In a further embodiment, the bottom end of the filter core is provided with a beveled ring, and the bottom plate of the outer cylinder is provided with an annular beveled groove that cooperates with the beveled ring. A sealing ring II is embedded on the beveled sidewall of the beveled groove.

[0011] In a further embodiment, the top of the feed tube expands outward to form a funnel-shaped structure.

[0012] In a further embodiment, a one-way valve is installed at the lower end of the feed pipe.

[0013] In a further embodiment, the bottom plate of the outer cylinder is inclined from the middle to the outer edge, and the lower edge of the drain pipe is located at the lowest point of the bottom plate of the outer cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention, by setting the movable ring to slide up and down between the outer cylinder and the filter element when the screw is turned, scrapes away impurities on the inner wall of the outer cylinder and the outer wall of the filter element, achieving the effect of cleaning the filter element inside the device. The cleaning process is more convenient and easier to operate. When the movable ring moves downward, it can also pressurize the liquid to be filtered between the outer cylinder and the filter element, thereby improving the filtration efficiency. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of this utility model;

[0017] Figure 2 is a schematic diagram of the structure of this utility model from a bottom view;

[0018] Figure 3 is a schematic diagram of the structure of this utility model after partial cross-section;

[0019] Figure 4 is a partially enlarged structural diagram of point A in Figure 3 of this utility model.

[0020] In the diagram: 1. Outer cylinder; 2. Cylinder cover; 3. Filter core; 31. Connecting cover; 32. Rubber plug; 33. Inclined ring; 4. Moving ring; 5. Screw; 6. Feed pipe; 7. Discharge pipe; 8. Control valve one; 9. Drain pipe; 10. Control valve two; 11. Sealing ring one; 12. Inclined groove; 13. Sealing ring two; 14. Check valve. Detailed Implementation

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to Figures 1-4. A pharmaceutical intermediate filtration device includes an outer cylinder 1 and a filter core 3. The outer cylinder 1 is equipped with a cover 2. Specifically, the cover 2 is bolted to the upper end of the outer cylinder 1 for easy disassembly. The outer cylinder 1 and the filter core 3 are coaxially sleeved. The filter core 3 is installed inside the outer cylinder 1, forming an annular filtration chamber space between them. A movable ring 4 is provided between the outer cylinder 1 and the filtration chamber of the filter core 3. The inner ring of the movable ring 4 fits against the outer wall of the filter core 3, and the outer ring of the movable ring 4 fits against the inner wall of the outer cylinder 1. A screw 5 is rotatably connected to the movable ring 4, and the upper end of the screw 5 extends through the upper surface of the cover 2. The screw 5 is threadedly connected to the cover 2, so that when the screw 5 rotates, it can drive the movable ring 4 to move up and down. The impurities on the inner wall of the outer cylinder 1 and the outer wall of the filter element 3 are scraped off, achieving the effect of cleaning the filter element inside the device. A feed pipe 6 is also installed through the cylinder cover 2, and the feed pipe 6 extends to the bottom of the movable ring 4, which facilitates the input of the liquid to be filtered into the space below the movable ring 4. The liquid to be filtered is filtered from the outside of the filter element 3 to the inside, so that the impurities remain on the outer layer of the filter element 3. A discharge pipe 7 is connected to the center opening of the bottom plate of the outer cylinder 1, and a control valve 8 is installed in the middle section of the discharge pipe 7. When the control valve 8 is opened, the filtered liquid inside the filter element 3 can be discharged through the discharge pipe 7. A drain pipe 9 is also connected to the outer wall of the outer cylinder 1, and a control valve 10 is installed in the middle section of the drain pipe 9, so that the cleaned impurities can be discharged through the drain pipe 9.

[0025] Furthermore, to facilitate better cleaning of the filter cartridge 3, a connecting cover 31 is provided on the filter cartridge 3. The connecting cover 31 is threadedly connected to the cover 2, allowing the filter cartridge 3 to be rotated and disassembled relative to the outer cylinder 1. A sealing ring 11 is embedded on the upper end face of the threaded interface of the cover 2. A beveled ring 33 is provided at the bottom end of the filter cartridge 3, and an annular beveled groove 12 that mates with the beveled ring 33 is provided on the bottom plate of the outer cylinder 1. A sealing ring 13 is embedded on the beveled side wall of the beveled groove 12, ensuring that when the filter cartridge 3 is tightened, the connection between the connecting cover 31 and the cover 2 is tight, and the connection between the beveled ring 33 and the beveled groove 12 is also tight, preventing the filtrate from overflowing.

[0026] The connecting cover 31 has an opening at its center, into which a rubber plug 32 is inserted. The outer side wall of the rubber plug 32 has a protrusion that engages with the inner side wall of the opening. The protrusion limits the rubber plug 32, so that when the rubber plug 32 is inserted, rotating the rubber plug 32 will drive the connecting cover 31 to rotate, and the rubber plug 32 can be opened to expose the opening. Rinsing water can be injected into the opening to backwash the filter cartridge 3 from the inside to the outside.

[0027] The top of the feed pipe 6 expands outward to form a funnel-shaped structure, so as to better guide the liquid to be filtered into the outer cylinder 1. At the same time, a one-way valve 14 is installed at the lower end of the feed pipe 6 to prevent the liquid from flowing back from the bottom of the feed pipe 6 when the liquid to be filtered is pressurized.

[0028] The bottom plate of the outer cylinder 1 slopes from the middle to the outer edge, and the lower edge of the drain pipe 9 is located at the lowest point of the bottom plate of the outer cylinder 1, so as to fully discharge the cleaning wastewater.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pharmaceutical intermediate filtration device comprising an outer cylinder (1) and a filter cylinder core (3), characterized in that: The outer cylinder (1) is provided with a cylinder cover (2), and the outer cylinder (1) and the filter cylinder core (3) are coaxially sleeved. A movable ring (4) is provided between the outer cylinder (1) and the filter cylinder core (3). The inner ring of the movable ring (4) is in contact with the outer wall of the filter cylinder core (3), and the outer ring of the movable ring (4) is in contact with the inner wall of the outer cylinder (1). A screw (5) is rotatably connected to the movable ring (4), and the screw (5) passes through the cylinder cover (2) and is threadedly connected to it. A feed pipe (6) is also installed through the cylinder cover (2), and the feed pipe (6) passes through to the bottom of the movable ring (4). A discharge pipe (7) is connected to the center opening of the bottom plate of the outer cylinder (1), and a control valve (8) is installed in the middle section of the discharge pipe (7). A drain pipe (9) is also connected to the outer side wall of the outer cylinder (1), and a control valve (10) is installed in the middle section of the drain pipe (9).

2. A pharmaceutical intermediate filtration apparatus as claimed in claim 1, wherein: The filter core (3) is provided with a connecting cover (31), which is threadedly connected to the cover (2), and a sealing ring (11) is embedded on the upper end face of the threaded interface of the cover (2).

3. A pharmaceutical intermediate filtration apparatus as claimed in claim 2, wherein: The connecting cover (31) has an opening at its center, into which a rubber plug (32) is inserted, and the outer side wall of the rubber plug (32) has a protrusion that engages with the inner side wall of the opening.

4. The pharmaceutical intermediate filtration apparatus of claim 1, wherein: The bottom end of the filter core (3) is provided with a beveled ring (33), and the bottom plate of the outer cylinder (1) is provided with an annular beveled groove (12) that cooperates with the beveled ring (33). A sealing ring (13) is inlaid on the beveled side wall of the beveled groove (12).

5. The pharmaceutical intermediate filtration apparatus of claim 1, wherein: The top of the feed pipe (6) expands outward to form a funnel-shaped structure.

6. The pharmaceutical intermediate filtration apparatus of claim 1, wherein: A one-way valve (14) is installed at the lower end of the feed pipe (6).

7. The pharmaceutical intermediate filtration apparatus of claim 1, wherein: The bottom plate of the outer cylinder (1) is inclined from the middle to the outer edge, and the lower edge of the drain pipe (9) is located at the lowest point of the bottom plate of the outer cylinder (1).

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