Filtering device for producing medical intermediates

Abstract

The utility model relates to a filter device for producing medical intermediates, which comprises a filter box, a filter cartridge and a cleaning component, and is technically characterized in that a through hole is formed in the top of the filter box, a bearing is fixed on the periphery of the through hole, an expanding support edge is arranged at the upper end of the filter cartridge, and the lower surface of the expanding support edge is connected with the bearing; a first transmission mechanism connected with the expanding supporting edge is fixed to the top face of the filter box, a first filter screen layer is fixed to the bottom of the filter cartridge through a positioning ring, a second filter screen layer is fixed to the inner circumferential face of the filter cartridge, a plurality of slag discharging holes are evenly formed in the outer circumferential face of the lower end of the filter cartridge, and a check ring capable of rotating relatively is connected to the periphery of the filter cartridge. The check ring is provided with drainage holes in one-to-one correspondence with the slag discharge holes, a second transmission mechanism is connected between the check ring and the filter box, and the cleaning assembly comprises a cleaning nozzle which is arranged on the filter box and faces the filter cartridge. The device solves the problem that the cleaning process of the filtering device is troublesome, and the cleaning efficiency and the use efficiency of the filtering device are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical intermediate processing, in particular to a filtering device for producing pharmaceutical intermediates. Background Art

[0002] Pharmaceutical intermediates are chemical raw materials or chemical products used in the synthesis of drugs. In order to avoid affecting the production quality of chemical products, the raw materials of pharmaceutical intermediates need to be filtered to remove large particles in the slurry to ensure product quality and drug safety.

[0003] For example, CN 115155135 B provides a filtering device for producing pharmaceutical intermediates, which includes a barrel, a cover plate, a feed port, a discharge pipe and a filter cartridge. A circular ring is provided at the bottom of the filter cartridge, and a filter net bag I is provided at the top of the inner side wall of the circular ring. A support rod connected to the circular ring is provided at the bottom of the barrel, and a clamping rod is also provided on the inner bottom wall of the barrel. A screw extending to the bottom of the filter cartridge is screwed into the screw tube I on the clamping rod, and multiple groups of sliding openings are vertically provided on the side wall of the filter cartridge. A circle of receiving grooves is also provided on the bottom of the filter cartridge, and the receiving grooves and the circular rings are connected by a slider passing through the sliding opening. Multiple groups of fixed rings are provided in the filter cartridge, and arc plates for sealing the corresponding sliding openings are provided on both upper and lower sides of the fixed rings, and the uppermost arc plate is fixedly connected to the bottom of the cover plate. A filter net bag II is provided in the fixed ring, and the middle of the multiple groups of filter net bags II are connected by a connecting rod. The filtering device is intended to deform the side wall of the filter net bag II to facilitate the separation of the filtered material from it, and to achieve the purpose of cleaning by scraping off the adherent material on the side wall of the filter net cylinder. However, there are the following problems during use: when cleaning, it is necessary to open the cover, disassemble the cylinder and the lower barrel, and even disassemble the filter net bag, and the cleaning process is still relatively troublesome. Utility Model Content

[0004] The purpose of the utility model is to provide a filtering device for producing pharmaceutical intermediates with reasonable structure and reliable use, solve the problem that the cleaning process of the filtering device is relatively troublesome, and significantly improve the cleaning efficiency and use efficiency of the filtering device.

[0005] The technical solution of the utility model is:

[0006] A filtering device for producing pharmaceutical intermediates, comprising a filtering box, a filtering cylinder and a cleaning component. Filtering holes are provided on the side wall of the filtering cylinder. The technical key points are as follows: A through hole is provided at the top of the filtering box, and a bearing is fixed on the outer periphery of the through hole. The filtering cylinder is inserted into the filtering box through the through hole. An enlarged diameter support edge is provided at the upper end of the filtering cylinder. The enlarged diameter support edge is concentric with the bearing, and the lower surface of the enlarged diameter support edge is connected to the bearing. A first transmission mechanism connected to the enlarged diameter support edge is fixed on the top surface of the filtering box. A first filter layer is fixed at the bottom of the filtering cylinder by a positioning ring. A second filter layer is fixed on the inner peripheral surface of the filtering cylinder. A plurality of slag discharge holes are evenly provided on the outer peripheral surface of the lower end of the filtering cylinder. A rotatable retaining ring is connected to the outer periphery of the filtering cylinder. Drainage holes corresponding to the slag discharge holes one by one are provided on the retaining ring. A second transmission mechanism is connected between the retaining ring and the filtering box. The cleaning component includes a cleaning nozzle provided on the filtering box and facing the filtering cylinder.

[0007] In the above-mentioned filtering device for producing pharmaceutical intermediates, an upper cover is provided at the top of the filtering cylinder. A connecting handle is provided between the top surface of the upper cover and the top surface of the filtering box. The lower edge of the lower surface of the upper cover contacts the upper edge of the filtering cylinder but does not affect relative rotation.

[0008] In the above-mentioned filtering device for producing pharmaceutical intermediates, a feed inlet is fixed at the center of the upper cover. A hollow frame is fixed at the lower end of the feed inlet, and a stirring paddle is fixed at the center of the lower surface of the hollow frame.

[0009] In the above-mentioned filtering device for producing pharmaceutical intermediates, the inner bottom surface of the filtering box is an inclined surface, and a discharge port is fixed at the low end of the inclined surface. The outer end of the discharge port is further connected with a circulation pipeline. The end of the circulation pipeline is communicated with the feed pipeline of the filtering device. A lifting pump is provided on the circulation pipeline, and control valves are provided at both ends of the circulation pipeline.

[0010] In the above-mentioned filtering device for producing pharmaceutical intermediates, a support is fixed on one side of the top surface of the filtering box. The first transmission mechanism includes a first servo motor fixed on the support, a first gear ring provided on the outer periphery of the enlarged diameter support edge, and a first driving gear provided on the output shaft of the first servo motor and meshing with the first gear ring.

[0011] In the above-mentioned filtering device for producing pharmaceutical intermediates, the second transmission mechanism includes a rotating handle fixed on one side of the top surface of the filtering box, a second gear ring provided on the outer periphery of the retaining ring, and a second driving gear provided at the lower end of the handle and meshing with the second gear ring.

[0012] In the above-mentioned filtering device for producing pharmaceutical intermediates, two-piece snap rings are fixed at the upper end of the retaining ring, and an annular groove cooperating with the two-piece snap rings is provided on the side wall of the filtering cylinder.

[0013] The beneficial effects of the present utility model are:

[0014] When it is necessary to clean the first filter layer and the second filter layer, the first transmission mechanism is used to drive the filter cartridge to rotate. At the same time, the cleaning nozzle sprays clean water to the outer wall of the filter cartridge to clean the outside of the filter cartridge and the outer wall of the second filter layer. The clean water in the filter cartridge drives the attachments on the inner wall of the second filter layer to flow down. The second transmission mechanism drives the retaining ring to rotate a certain angle, so that the leakage holes on the retaining ring correspond to and are connected with the slag discharge holes on the filter cartridge. The clean water in the filter cartridge flows down with the attachments and is discharged from the inside of the filter cartridge through the slag discharge holes and the leakage holes. Finally, it is discharged from the discharge port to the outside of the box to achieve the cleaning purpose. During the entire cleaning process, there is no need to open the upper cover or disassemble the filter box. The operation is convenient, which solves the problem of the troublesome cleaning process of the filter device and significantly improves the cleaning efficiency and use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 Schematic diagram of the top of the filter box;

[0017] Figure 3 yes Figure 1 Enlarged view of part A in the middle.

[0018] In the figure: 1. first servo motor, 2. support, 3. first driving gear, 4. filter box, 5. cleaning nozzle, 6. handle, 7. upper cover, 8. feed port, 9. feed pipeline, 10. control valve, 11. circulation pipeline, 12. expansion support edge, 13. rotating handle, 14. first gear ring, 15. bearing, 16. lifting pump, 17. second driving gear, 18. discharge port, 19. first filter mesh layer, 20. retaining ring, 21. filter cartridge, 22. second filter mesh layer, 23. stirring paddle, 24. hollow frame, 25. two-petal clamp, 26. second gear ring, 27. slag discharge hole, 28. positioning ring. DETAILED DESCRIPTION

[0019] The utility model is described in detail according to the accompanying drawings of the specification.

[0020] like Figures 1 to 3 As shown, the filtering device for producing pharmaceutical intermediates includes a filter box 4, a filter cartridge 21 and a cleaning component.

[0021] Among them, a through hole is provided at the top of the filter box 4, and a bearing 15 is fixed on the outer periphery of the through hole. The filter cylinder 21 is inserted into the filter box 4 through the through hole. An enlarged-diameter support edge 12 is provided at the upper end of the filter cylinder 21. The enlarged-diameter support edge 12 is concentrically arranged with the bearing 15, and the lower surface of the enlarged-diameter support edge 12 is connected to the bearing 15. The top surface of the filter box 4 is fixed with a first transmission mechanism connected to the enlarged-diameter support edge 12. A support 2 is fixed on one side of the top surface of the filter box 4. The first transmission mechanism includes a first servo motor 1 fixed on the support 2, a first gear ring 14 provided on the outer periphery of the enlarged-diameter support edge 12, and a first driving gear 3 provided on the output shaft of the first servo motor 1 and meshing with the first gear ring 14.

[0022] The bottom of the filter cylinder 21 fixes a first filter screen layer 19 by using a positioning ring 28. The inner peripheral surface of the filter cylinder 21 fixes a second filter screen layer 22. A plurality of slag discharge holes 27 are evenly provided on the outer peripheral surface of the lower end of the filter cylinder 21. A rotatable retaining ring 20 is connected to the outer periphery of the filter cylinder 21, and flow discharge holes corresponding to the slag discharge holes 27 one by one are provided on the retaining ring 20. Two split-type snap rings 25 are fixed at the upper end of the retaining ring 20, and an annular groove for cooperating with the two split-type snap rings 25 is provided on the side wall of the filter cylinder 21. A second transmission mechanism is connected between the retaining ring 20 and the filter box 4. The second transmission mechanism includes a rotary handle 13 fixed on one side of the top surface of the filter box 4, a second gear ring 26 provided on the outer periphery of the retaining ring 20, and a second driving gear 17 provided at the lower end of the rotary handle 13 and meshing with the second gear ring 26. The cleaning assembly includes a cleaning spray head 5 provided on the filter box 4 and facing the filter cylinder 21.

[0023] In this embodiment, an upper cover 7 is provided at the top of the filter cylinder 21. A connecting handle 6 is provided between the top surface of the upper cover 7 and the top surface of the filter box 4. The lower edge of the lower surface of the upper cover 7 contacts the upper edge of the filter cylinder 21 but does not affect relative rotation. A feed inlet 8 is fixed at the center of the upper cover 7. A hollow frame 24 is fixed at the lower end of the feed inlet 8, and a stirring paddle 23 is fixed at the center of the lower surface of the hollow frame 24. The inner bottom surface of the filter box 4 is an inclined surface, and a discharge port 18 is fixed at the low position end of the inclined surface. The outer end of the discharge port 18 is further connected with a circulation pipeline 11. The end of the circulation pipeline 11 is communicated with the feed pipeline 9 of the filtering device. A lift pump 16 is provided on the circulation pipeline 11, and control valves 10 are respectively provided at both ends of the circulation pipeline 11.

[0024] Working process:

[0025] 1. During normal operation, slurry is injected into the feed port 8 through the feed pipeline 9. During this process, the first transmission mechanism drives the filter cartridge 21 to rotate, and generates relative rotation with the stirring paddle 23, thereby accelerating the filtering speed of the slurry. The slurry is filtered through the first filter mesh layer 19 and the second filter mesh layer 22, and the filtered liquid is discharged through the discharge port 18. In order to enhance the filtering function, a circulation method can be adopted, and the filtrate can be returned to the filter cartridge 21 by using the lifting pump 16, and discharged for use after multiple filtrations.

[0026] 2. When it is necessary to clean the first filter mesh layer 19 and the second filter mesh layer 22, the first transmission mechanism drives the filter cartridge 21 to rotate. At the same time, the cleaning nozzle 5 sprays clean water to the outer wall of the filter cartridge 21 to clean the outside of the filter cartridge 21 and the outer wall of the second filter mesh layer 22; the clean water in the filter cartridge 21 drives the attachments on the inner wall of the second filter mesh layer 22 to flow down, and the second transmission mechanism drives the retaining ring 20 to rotate a certain angle, so that the leakage holes on the retaining ring 20 correspond to the slag discharge holes 27 on the filter cartridge 21 one by one and are connected. After the clean water in the filter cartridge 21 flows down with the attachments, it is discharged from the inside of the filter cartridge 21 through the slag discharge holes 27 and the leakage holes. Finally, the clean water inside and outside the filter cartridge 21 is discharged from the outside of the box through the discharge port 18 with the attachments, thereby achieving the cleaning purpose.

[0027] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A filtering device for producing pharmaceutical intermediates, comprising a filter box, a filter cartridge and a cleaning assembly, wherein a filter hole group is provided on the side wall of the filter cartridge, characterized in that: The filter box is provided with a through hole on the top and a bearing is fixed on the outer periphery of the through hole, the filter cartridge is inserted into the filter box through the through hole, and an expansion support edge is provided on the upper end of the filter cartridge, the expansion support edge is arranged concentrically with the bearing and the lower surface of the expansion support edge is connected to the bearing, a first transmission mechanism connected to the expansion support edge is fixed on the top surface of the filter box, a first filter mesh layer is fixed on the bottom of the filter cartridge by a positioning ring, a second filter mesh layer is fixed on the inner periphery of the filter cartridge, a plurality of slag discharge holes are evenly arranged on the outer periphery of the lower end of the filter cartridge, a relatively rotatable retaining ring is connected to the outer periphery of the filter cartridge, leakage holes corresponding to the slag discharge holes are provided on the retaining ring, a second transmission mechanism is connected between the retaining ring and the filter box, and the cleaning assembly includes a cleaning nozzle arranged on the filter box and facing the filter cartridge.

2. The filtering device for producing pharmaceutical intermediates according to claim 1, characterized in that: An upper cover is provided on the top of the filter cartridge, a connecting handle is provided between the top surface of the upper cover and the top surface of the filter box, and the lower edge of the upper cover contacts the upper edge of the filter cartridge but does not affect relative rotation.

3. The filtering device for producing pharmaceutical intermediates according to claim 2, characterized in that: A feed port is fixed at the center of the upper cover, a hollow frame is fixed at the lower end of the feed port, and a stirring paddle is fixed at the center of the lower surface of the hollow frame.

4. The filtering device for producing pharmaceutical intermediates according to claim 1, characterized in that: The inner bottom surface of the filter box is an inclined surface and the lower end of the inclined surface is fixed with a discharge port. The outer end of the discharge port is further connected with a circulation pipeline. The end of the circulation pipeline is connected with the feed pipeline of the filter device. A lifting pump is provided on the circulation pipeline. Control valves are respectively provided at both ends of the circulation pipeline.

5. The filtering device for producing pharmaceutical intermediates according to claim 1, characterized in that: A support is fixed on one side of the top surface of the filter box, and the first transmission mechanism includes a first servo motor fixed on the support, a first gear ring arranged along the outer circumference of the expansion support, and a first driving gear arranged on the output shaft of the first servo motor and meshing with the first gear ring.

6. The filtering device for producing pharmaceutical intermediates according to claim 1, characterized in that: The second transmission mechanism includes a rotating handle fixed to one side of the top surface of the filter box, a second gear ring arranged on the outer periphery of the retaining ring, and a second driving gear arranged at the lower end of the handle and meshing with the second gear ring.

7. The filtering device for producing pharmaceutical intermediates according to claim 1, characterized in that: A two-petal clamping ring is fixed on the upper end of the retaining ring, and an annular groove cooperating with the two-petal clamping ring is provided on the side wall of the filter cartridge.

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