A multi-stage filtering device for pharmaceutical production

Abstract

This utility model provides a multi-stage filtration device for pharmaceutical production, relating to the technical field of pharmaceutical production equipment. It includes: a filter tank containing a rotating main shaft; a primary filter screen fixedly installed in the upper half of the filter tank; a rotating frame above the primary filter screen; and a fixed frame fixedly installed in the lower half of the filter tank. A secondary filter screen is mounted on the fixed frame. Continuous rotation of a scraper prevents impurities from accumulating on the surface of the primary filter screen, avoiding flow rate reduction or pressure difference increase due to filter pore blockage, thus maintaining stable filtration efficiency. It also reduces corrosion or physical damage to the filter screen caused by long-term impurity adhesion, lowers replacement frequency, and saves maintenance costs. This invention solves the problems of existing multi-stage filtration equipment for pharmaceutical production, where long-term impurity adhesion easily leads to filter screen corrosion or physical damage, and filter pore blockage causes flow rate reduction, requiring frequent replacement and increasing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical production equipment technology, and in particular to a multi-stage filtration device for pharmaceutical production. Background Technology

[0002] In pharmaceutical manufacturing, filtration is a crucial process for ensuring the safety, efficacy, and stability of drugs. It is used to remove contaminants such as particles and microorganisms from liquids or gases. No single filter can remove all types of impurities in a single pass; therefore, multi-stage filtration systems are employed to meet different purification objectives, a common and mandatory practice in the pharmaceutical industry.

[0003] In existing pharmaceutical production multi-stage filtration equipment, long-term adhesion of impurities can easily lead to filter screen corrosion or physical damage. Moreover, filter pore blockage can cause a decrease in flow rate, requiring frequent replacement and increasing maintenance costs. In addition, when filtering high-viscosity pharmaceutical solutions or high-solids-content liquids, the increased impurity load in the pharmaceutical solution increases the liquid viscosity resistance, which can generate particle agglomerates and affect the filtration effect. Utility Model Content

[0004] This utility model relates to a multi-stage filtration device for pharmaceutical production. The continuous rotation and scraping of the scraper can prevent impurities from accumulating on the surface of the primary filter screen, avoiding a decrease in flow rate or an increase in pressure difference due to filter pore blockage, thereby maintaining a stable filtration efficiency. It also reduces the corrosion or physical damage to the filter screen caused by long-term adhesion of impurities, reduces the replacement frequency, and saves maintenance costs.

[0005] This utility model provides a multi-stage filtration device for pharmaceutical production, specifically including: a filter tank, wherein a rotating main shaft is provided inside the filter tank; a primary filter screen is fixedly installed in the upper half of the filter tank; a rotating frame is provided above the primary filter screen; a fixed frame is fixedly installed in the lower half of the filter tank; and a secondary filter screen is provided on the fixed frame. The filter tank is provided with a feed pipe at the upper part of its outer periphery, a discharge pipe at the bottom of the filter tank, and a top cover at the top of the filter tank. A servo motor is provided on the top of the top cover, and the shaft of the servo motor is connected to the rotating main shaft through a coupling.

[0006] Furthermore, the rotating main shaft is rotatably connected to the top cover via bearings, and a stirring fan is provided at the bottom of the rotating main shaft. A spline shaft is provided on the rotating main shaft, and the spline shaft is positioned corresponding to the rotating frame. A rotating seat is provided on the rotating main shaft, and the rotating seat is located below the secondary filter screen. A spherical groove is provided on the top of the rotating seat, and the spherical groove is distributed in a ring array.

[0007] Furthermore, the primary filter screen has an installation ring in the middle, and the rotating main shaft is rotatably connected to the installation ring. A rotating sleeve is rotatably mounted on the installation ring, and a tension spring is provided on the rotating sleeve.

[0008] Furthermore, the rotating frame includes a connecting kit, a spline sleeve, a rotating rod, and a scraper. The connecting kit has a spline sleeve in the middle, which is slidably fitted onto the spline shaft. The connecting kit has three rotating rods on its outer periphery, which are arranged in a circular array. The bottom of the rotating rod has a scraper that contacts the primary filter screen.

[0009] Furthermore, the fixed frame is provided with limiting side frames at both ends, and a support plate is provided at the top of the limiting side frames. A limiting round rod is provided between the support plate and the fixed frame, and a compression spring is fitted on the limiting round rod.

[0010] Furthermore, the secondary filter screen has limiting grooves on both sides of its outer periphery, two fixing blocks on the secondary filter screen, and the fixing blocks are positioned corresponding to the limiting grooves. A mounting base is provided in the middle of the secondary filter screen, and the bottom of the mounting base has spherical protrusions distributed in a ring array.

[0011] Furthermore, the secondary filter screen is slidably connected to the limiting side frame through the limiting groove, and the limiting round rod slides through the fixing block, and the compression spring is supported between the fixing block and the support plate, and the spherical protrusion is connected to the spherical groove in a transmission manner.

[0012] This utility model provides a multi-stage filtration device for pharmaceutical production, which has the following beneficial effects: This invention features a rotating frame that slides between a splined shaft and a splined sleeve, and utilizes the rebound pulling action of a tension spring to bring the scraper into contact with the surface of the primary filter screen. Simultaneously, a servo motor provides power, enabling the rotating main shaft to drive the rotating frame to rotate. The continuous rotation and scraping action of the scraper prevents impurities from accumulating on the surface of the primary filter screen, avoiding a decrease in flow rate or an increase in pressure differential due to filter pore blockage, thereby maintaining stable filtration efficiency. Furthermore, it reduces the corrosion or physical damage to the filter screen caused by long-term adhesion of impurities, lowers the replacement frequency, and saves maintenance costs.

[0013] In addition, during the rotation of the main shaft, the main shaft can drive the rotating seat to rotate. Through the transmission cooperation of the spherical groove and spherical protrusion, and by utilizing the elasticity of the compression spring, the secondary filter screen can float up and down along the limiting side frame. The vibration adjustment of the secondary filter screen reduces the viscosity resistance of the medicine liquid, effectively disperses particle agglomerates, avoids false interception, and significantly improves the filtration effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0015] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0016] In the attached diagram: Figure 1 This paper shows a cross-sectional view of the filter tank structure of this application; Figure 2 A schematic diagram of the primary filter structure of this application is shown; Figure 3 This invention provides a schematic diagram showing the partial disassembled state of the rotating spindle and the rotating frame. Figure 4 A schematic diagram of the rotating spindle and fixed frame structure of this application is shown; Figure 5 A schematic diagram of the secondary filter structure of this application is shown.

[0017] List of reference numerals in the attached diagram: 1. Filter tank; 101. Feed pipe; 102. Discharge pipe; 103. Top cover; 104. Servo motor; 2. Rotating spindle; 201. Agitator fan; 202. Splined shaft; 203. Rotating seat; 204. Spherical groove; 3. Primary filter screen; 301. Mounting ring; 302. Rotating sleeve; 303. Tension spring; 4. Rotating frame; 401. Connecting kit; 402. Splined sleeve; 403. Rotating rod; 404. Scraper; 5. Fixing frame; 501. Limiting side frame; 502. Support plate; 503. Limiting round rod; 504. Compression spring; 6. Secondary filter screen; 601. Limiting groove; 602. Fixing block; 603. Mounting seat; 604. Spherical protrusion. Detailed Implementation

[0018] 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, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] Example 1: Please refer to Figures 1 to 5 : This utility model proposes a multi-stage filtration device for pharmaceutical production, comprising: a filter tank 1, a rotating main shaft 2 inside the filter tank 1; a primary filter screen 3 fixedly installed in the upper half of the filter tank 1; a rotating frame 4 above the primary filter screen 3; a fixing frame 5 fixedly installed in the lower half of the filter tank 1; and a secondary filter screen 6 installed on the fixing frame 5. A feed pipe 101 is provided at the upper part of the outer periphery of the filter tank 1, a discharge pipe 102 is provided at the bottom of the filter tank 1, a top cover 103 is provided at the top of the filter tank 1, a servo motor 104 is provided at the top of the top cover 103, and the rotating shaft of the servo motor 104 is connected to the rotating main shaft 2 through a coupling. The rotating main shaft 2 is rotatably connected to the top cover 103 via bearings, and the bottom end of the rotating main shaft 2 is provided with a stirring fan 201. The rotating main shaft 2 is provided with a spline shaft 202, and the spline shaft 202 is positioned corresponding to the rotating frame 4. The rotating main shaft 2 is provided with a rotating seat 203, and the rotating seat 203 is located below the secondary filter screen 6. The top of the rotating seat 203 is provided with a spherical groove 204, and the spherical grooves 204 are distributed in a ring array.

[0020] In this embodiment, as Figure 2 and Figure 3 As shown, a mounting ring 301 is provided in the middle of the primary filter screen 3, and the rotating main shaft 2 is rotatably connected to the mounting ring 301. A rotating sleeve 302 is rotatably mounted on the mounting ring 301, and a tension spring 303 is provided on the rotating sleeve 302. The rotating frame 4 includes a connecting kit 401, a spline sleeve 402, a rotating rod 403, and a scraper 404. The spline sleeve 402 is located in the middle of the connecting kit 401 and is slidably fitted onto the spline shaft 202. Three rotating rods 403 are located on the outer periphery of the connecting kit 401 and are arranged in a circular array. The scraper 404 is located at the bottom of the rotating rod 403 and is in contact with the primary filter screen 3. In this utility model, the rotating frame 4 is provided. Through the sliding cooperation of the spline shaft 202 and the spline sleeve 402, and the rebound pulling action of the tension spring 303, the scraper 404 can be made to contact the surface of the primary filter screen 3. At the same time, the servo motor 104 provides power so that the rotating main shaft 2 drives the rotating frame 4 to rotate. The continuous rotation and scraping of the scraper 404 can prevent impurities from accumulating on the surface of the primary filter screen 3.

[0021] Example 2, based on Example 1, such as Figure 4 and Figure 5 As shown, the fixed frame 5 has a limiting side frame 501 at both the left and right ends, a support plate 502 at the top of the limiting side frame 501, a limiting round rod 503 between the support plate 502 and the fixed frame 5, and a compression spring 504 is fitted on the limiting round rod 503. The secondary filter screen 6 has limiting grooves 601 on both sides of its outer periphery, and two fixing blocks 602 on the secondary filter screen 6, with the fixing blocks 602 corresponding to the limiting grooves 601. The secondary filter screen 6 has a mounting base 603 in the middle, and the bottom of the mounting base 603 has spherical protrusions 604, which are distributed in a ring array. The secondary filter screen 6 is slidably connected to the limiting side frame 501 via the limiting groove 601, and the limiting round rod 503 slides through the fixed block 602. The compression spring 504 is supported between the fixed block 602 and the support plate 502. The spherical protrusion 604 is connected to the spherical groove 204. When the rotating main shaft 2 rotates, the rotating main shaft 2 can drive the rotating seat 203 to rotate. Through the transmission cooperation of the spherical groove 204 and the spherical protrusion 604, and by utilizing the elasticity of the compression spring 504, the secondary filter screen 6 can float up and down along the limiting side frame 501. The vibration adjustment of the secondary filter screen 6 reduces the viscosity resistance of the medicine liquid and effectively disperses the particle agglomerates.

[0022] The working principle of this embodiment is as follows: During use, the spline shaft 202 and spline sleeve 402 slide together, and the tension spring 303 rebounds and pulls, so that the scraper 404 can contact the surface of the primary filter screen 3. At the same time, the servo motor 104 provides power, which enables the rotating main shaft 2 to drive the rotating frame 4 to rotate. The continuous rotation and scraping of the scraper 404 can prevent impurities from accumulating on the surface of the primary filter screen 3. When the rotating main shaft 2 rotates, it can drive the rotating seat 203 to rotate. Through the transmission cooperation of the spherical groove 204 and spherical protrusion 604, and with the elastic action of the compression spring 504, the secondary filter screen 6 can float up and down along the limiting side frame 501. The vibration adjustment of the secondary filter screen 6 reduces the viscosity resistance of the medicine liquid and effectively disperses the particle agglomerates.

[0023] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A multi-stage filtration device for pharmaceutical production, characterized in that, include: A filter tank (1) is provided with a rotating main shaft (2); a primary filter screen (3) is fixedly installed in the upper half of the filter tank (1); a rotating frame (4) is provided above the primary filter screen (3); a fixing frame (5) is fixedly installed in the lower half of the filter tank (1); a secondary filter screen (6) is provided on the fixing frame (5). The filter tank (1) is provided with a feed pipe (101) at the upper part of its outer periphery, a discharge pipe (102) at the bottom of the filter tank (1), a top cover (103) at the top of the filter tank (1), a servo motor (104) at the top of the top cover (103), and the shaft of the servo motor (104) is connected to the rotating main shaft (2) through a coupling.

2. The multi-stage filtration apparatus for pharmaceutical production according to claim 1, wherein, The rotating main shaft (2) is rotatably connected to the top cover (103) via bearings, and the bottom end of the rotating main shaft (2) is provided with a stirring fan (201). The rotating main shaft (2) is provided with a spline shaft (202), and the spline shaft (202) is positioned corresponding to the rotating frame (4). The rotating main shaft (2) is provided with a rotating seat (203), and the rotating seat (203) is located below the secondary filter screen (6). The top of the rotating seat (203) is provided with a spherical groove (204), and the spherical groove (204) is distributed in a ring array.

3. The multi-stage filtration apparatus for pharmaceutical production according to claim 1, wherein, The primary filter screen (3) is provided with an installation ring (301) in the middle position, and the rotating main shaft (2) is rotatably connected to the installation ring (301). A rotating sleeve (302) is rotatably installed on the installation ring (301), and a tension spring (303) is provided on the rotating sleeve (302).

4. The multi-stage filtration apparatus for pharmaceutical production according to claim 1, wherein, The rotating frame (4) includes a connecting kit (401), a spline sleeve (402), a rotating rod (403), and a scraper (404). The connecting kit (401) has a spline sleeve (402) in the middle position, and the spline sleeve (402) is slidably fitted on the spline shaft (202). The connecting kit (401) has three rotating rods (403) on its outer periphery, and the three rotating rods (403) are distributed in a ring array. The bottom of the rotating rod (403) has a scraper (404), and the scraper (404) is in contact with the primary filter screen (3).

5. A multi-stage filtration device for pharmaceutical production according to claim 1, characterized in that, The fixed frame (5) is provided with a limiting side frame (501) at both ends. The top of the limiting side frame (501) is provided with a support plate (502). A limiting round rod (503) is provided between the support plate (502) and the fixed frame (5). A compression spring (504) is fitted on the limiting round rod (503).

6. The multi-stage filtration apparatus for pharmaceutical production according to claim 1, wherein, The secondary filter (6) has limiting grooves (601) on both sides of its outer periphery. The secondary filter (6) has two fixing blocks (602) on it, and the fixing blocks (602) correspond to the limiting grooves (601). The secondary filter (6) has a mounting base (603) in the middle position. The mounting base (603) has spherical protrusions (604) at the bottom, and the spherical protrusions (604) are distributed in a ring array.

7. The multi-stage filtration apparatus for pharmaceutical production according to claim 6, wherein, The secondary filter screen (6) is slidably connected to the limiting side frame (501) through the limiting groove (601), and the limiting round rod (503) slides through the fixing block (602). The compression spring (504) is supported between the fixing block (602) and the support plate (502), and the spherical protrusion (604) is connected to the spherical groove (204) in a transmission connection.

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