A biopharmaceutical extraction pressure filtration device

Abstract

The present invention belongs to the field of biopharmaceutical technology, and specifically is a biopharmaceutical extraction pressure filtration device, including a filter tank, a main filter, an automatic cleaning mechanism, a filter hole adjustment mechanism, a secondary filter, a backwash mechanism and a detection mechanism, wherein the main filter is installed inside the filter tank for filtering the drug solution, the automatic cleaning mechanism is arranged in the filter tank for cleaning the filter surface of the main filter and the inner wall of the filter tank, the secondary filter is arranged on the inner side of the main filter, and the filter hole adjustment mechanism is connected to the secondary filter and is used to drive the secondary filter to rotate. The biopharmaceutical extraction pressure filtration device can automatically clean the filter surface of the main filter and the inner wall of the filter tank by using the automatic cleaning mechanism installed on the filter tank, thereby avoiding the problem of impurities accumulating on the main filter and affecting its filtering efficiency and effect, and facilitating the subsequent cleaning of impurities.

Description

Technical Field

[0001] The invention relates to the technical field of biopharmaceuticals, and in particular to a biopharmaceutical extraction and pressure filtration device. Background Art

[0002] Biological drugs refer to products used for prevention, treatment and diagnosis that are manufactured by applying the research results of microbiology, biology, medicine, biochemistry, etc. from organisms, biological tissues, cells, organs, body fluids, etc. and comprehensively utilizing the scientific principles and methods of microbiology, chemistry, biochemistry, biotechnology, pharmacy, etc.

[0003] During the drug extraction process, the drug needs to be filtered under pressure to improve the purity of the drug. However, during the use of existing biopharmaceutical filtration devices, impurities are easily accumulated on the surface of the filtration mechanism, thereby affecting the filtration efficiency.

[0004] In order to solve the above problems, the present application proposes a biopharmaceutical extraction pressurized filtration device. Summary of the invention

[0005] (I) Purpose of the invention

[0006] In order to solve the technical problems existing in the background technology, the present invention provides a biopharmaceutical extraction pressurized filtration device, which has the characteristics of high filtration efficiency.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the present invention provides a biopharmaceutical extraction pressure filtration device, comprising a filter tank, a main filter screen, an automatic cleaning mechanism, a filter hole adjustment mechanism, a secondary filter screen, a backwash mechanism and a detection mechanism, wherein the main filter screen is installed inside the filter tank for filtering the drug solution, and the automatic cleaning mechanism is arranged in the filter tank for cleaning the filter surface of the main filter screen and the inner wall of the filter tank;

[0009] The auxiliary filter is arranged on the inner side of the main filter, the filter hole adjustment mechanism is connected to the auxiliary filter and is used to drive the auxiliary filter to rotate, and the backwash mechanism is installed on the inner side of the auxiliary filter to backwash the main filter and the auxiliary filter;

[0010] The detection mechanism is arranged outside the filter tank and is used to detect the filtering effect of the drug solution.

[0011] Preferably, the automatic cleaning mechanism includes a reduction motor, a rotating shaft, a stirring blade, a connecting rod, a scraper and connecting ribs. The reduction motor is fixedly mounted on the top of the filter tank, and the output shaft of the reduction motor is connected to the rotating shaft through a coupling. The rotating shaft is provided with a stirring blade located inside the filter tank, and the bottom of the rotating shaft is fixedly connected with a connecting rod. The middle part of the scraper is provided with a connecting rib, and both sides of the scraper are respectively in active contact with the inner wall of the filter tank and the outer wall of the main filter screen, and the end of the connecting rod is fixedly connected to the connecting rib.

[0012] Preferably, the filter hole adjustment mechanism includes a driving motor, a main shaft, a driving wheel, a slave shaft, a driven wheel and a synchronous belt. The driving motor is fixedly mounted on the bottom of the outer side of the filter tank, and the output shaft of the driving motor is connected to the main shaft, the bottom of the main shaft is equipped with a driving wheel, the slave shaft is movably mounted on the bottom of the filter tank, and the bottom of the slave shaft is equipped with a driven wheel, and a synchronous belt is mounted between the driven wheel and the driving wheel.

[0013] Preferably, the recoil mechanism includes a recoil pump, an inlet pipe, a branch pipe, a first solenoid valve, a recoil pipe, a fixing frame and a recoil hole, the inlet end of the recoil pump is connected to the inlet pipe, the inlet pipe is connected to the branch pipe, the inlet pipe is located at the front end of the branch pipe and a first solenoid valve is provided on the branch pipe, the outlet end of the recoil pump is connected to the recoil pipe, the fixing frame is fixed to the bottom of the filter tank, the recoil pipe is fixed to the fixing frame, and the recoil hole is opened on the slave shaft.

[0014] Preferably, the detection mechanism includes a water pump, a connecting pipe, a liquid return pipe, a detection tube, a turbidity sensor and a second solenoid valve, the liquid inlet end of the water pump is connected to the connecting pipe, and the liquid outlet end of the water pump is connected to the liquid return pipe, a detection tube is provided on the liquid return pipe, the turbidity sensor is installed on the detection tube, and two second solenoid valves located at the liquid inlet end and the liquid outlet end of the detection tube are installed on the liquid return pipe.

[0015] Preferably, a liquid inlet pipe is provided at the top of the filter tank, and a partition is provided at the bottom of the inner cavity of the filter tank, a liquid outlet is opened in the middle of the partition, a liquid outlet pipe is provided at the bottom of the filter tank, and a sewage pipe located above the partition is fixedly sleeved at the bottom of one side of the filter tank.

[0016] Preferably, the bottom of the main filter is fixed to the top of the partition, and the auxiliary filter is movably mounted inside the main filter.

[0017] Preferably, the top of the slave shaft is fixedly connected to the top of the inner wall of the auxiliary filter.

[0018] Preferably, one end of the branch pipe is connected to the liquid outlet pipe, and one end of the recoil pipe is movably sleeved inside the slave shaft.

[0019] Preferably, one end of the connecting pipe and the liquid return pipe is connected to the liquid outlet pipe.

[0020] The above technical solution of the present invention has the following beneficial technical effects:

[0021] 1. The biopharmaceutical extraction pressurized filtration device uses an automatic cleaning mechanism installed on the filter tank to automatically clean the filtering surface of the main filter and the inner wall of the filter tank, thereby avoiding the problem of impurities accumulating on the main filter and affecting its filtering efficiency and effect, and facilitating the subsequent cleaning of impurities.

[0022] 2. The biopharmaceutical extraction pressurized filtration device is provided with a filter hole adjustment mechanism, so that the main filter screen and the auxiliary filter screen cooperate to adjust the filter hole diameter of the entire filtration structure, thereby facilitating the extraction and filtration work of different drugs and having strong adaptability.

[0023] 3. The biopharmaceutical extraction pressurized filtration device is provided with a backwash mechanism. During the drug extraction and filtration process, the main filter and the auxiliary filter can be backwashed and cleaned to avoid impurities accumulating and clogging in the filter holes of the main filter and the auxiliary filter. At the same time, after the drug filtration is completed, the inside of the filter tank can be backwashed and cleaned, so as to clean the main filter and the auxiliary filter and facilitate the cleaning of impurities.

[0024] 4. The biopharmaceutical extraction pressurized filtration device can detect the turbidity of the filtered drug by arranging a detection mechanism on the liquid outlet pipe, thereby facilitating the monitoring of the impurity content in the filtered drug and helping users understand the effect of drug filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a cross-sectional view of the main filter structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the detection mechanism of the present invention;

[0028] Figure 4 It is an enlarged view of the overall structure A of the present invention;

[0029] Figure 5 A top view of the partition structure of the present invention;

[0030] Figure 6 It is a top cross-sectional view of the main and auxiliary filter screen structures of the present invention.

[0031] Reference numerals:

[0032] 1. Filter tank; 2. Main filter; 3. Automatic cleaning mechanism; 31. Speed ​​reducer motor; 32. Rotating shaft; 33. Stirring blade; 34. Connecting rod; 35. Scraper; 36. Connecting rib; 4. Filter hole adjustment mechanism; 41. Driving motor; 42. Main shaft; 43. Driving wheel; 44. Slave shaft; 45. Driven wheel; 46. Synchronous belt; 5. Auxiliary filter; 6. Recoil mechanism; 61. Recoil pump; 62. Water inlet pipe; 63. Branch pipe; 64. First solenoid valve; 65. Recoil pipe; 66. Fixed frame; 67. Recoil hole; 7. Detection mechanism; 71. Water pump; 72. Connecting pipe; 73. Liquid return pipe; 74. Detection pipe; 75. Turbidity sensor; 76. Second solenoid valve; 8. Liquid inlet pipe; 9. Partition; 10. Liquid outlet; 11. Liquid outlet pipe; 12. Drain pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0034] The specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0035] See also Figure 1-6 The present invention provides a technical solution: a biopharmaceutical extraction pressurized filtration device, including a filter tank 1, a main filter screen 2, an automatic cleaning mechanism 3, a filter hole adjustment mechanism 4, a secondary filter screen 5, a backwash mechanism 6 and a detection mechanism 7.

[0036] The main filter screen 2 is installed inside the filter tank 1 to filter the liquid medicine.

[0037] In this embodiment, the main filter 2 is used to filter the medicine, and the filtered medicine liquid enters the main filter 2 through the filter holes and is finally discharged through the liquid outlet 10 opened in the middle of the partition 9, while impurities are filtered outside the main filter 2.

[0038] The automatic cleaning mechanism 3 is disposed in the filter tank 1 and is used to clean the filter surface of the main filter screen 2 and the inner wall of the filter tank 1 .

[0039] In this embodiment, the automatic cleaning mechanism 3 is used to clean the impurities attached to the outer surface of the main filter 2 and the inner wall of the filter tank 1 during and after the filtering of the medicine.

[0040] The auxiliary filter 5 is arranged on the inner side of the main filter 2 , and the filter hole adjustment mechanism 4 is connected to the auxiliary filter 5 and is used to drive the auxiliary filter 5 to rotate.

[0041] In this embodiment, the filter hole adjustment mechanism 4 is used to drive the auxiliary filter 5 to rotate inside the main filter 2, and cooperate with the main filter 2 to adjust the filter hole diameter of the entire filter structure to adapt to the extraction and filtration work of different drugs.

[0042] The backwash mechanism 6 is installed on the inner side of the auxiliary filter 5 for backwashing the main filter 2 and the auxiliary filter 5 .

[0043] In this embodiment, the backflushing mechanism 6 is used to backflush and clean the main filter 2 and the auxiliary filter 5 during the drug extraction and filtration process and after the filtration is completed.

[0044] The detection mechanism 7 is arranged outside the filter tank 1 to detect the filtering effect of the liquid medicine.

[0045] In this embodiment, the detection mechanism 7 is used to monitor the impurity content in the filtered medicine, so as to understand the filtering effect of the filtering device on the medicine.

[0046] See also Figure 1 In this embodiment, the automatic cleaning mechanism 3 includes a reduction motor 31, a rotating shaft 32, a stirring blade 33, a connecting rod 34, a scraper 35 and a connecting rib 36.

[0047] The reduction motor 31 is fixedly mounted on the top of the filter tank 1 , and the output shaft of the reduction motor 31 is connected to a rotating shaft 32 via a coupling, and a stirring blade 33 located inside the filter tank 1 is disposed on the rotating shaft 32 .

[0048] During the drug filtering process, the reduction motor 31 is started to drive the stirring blade 33 on the rotating shaft 32 to rotate, so that the drugs in the filter tank 1 can be stirred to prevent impurities from settling or accumulating on the main filter screen 2, thereby accelerating the filtering efficiency of the drugs in the filter tank 1.

[0049] A connecting rod 34 is fixedly connected to the bottom of the rotating shaft 32 , a connecting rib 36 is provided in the middle of the scraper 35 , and an end of the connecting rod 34 is fixedly connected to the connecting rib 36 .

[0050] The two scrapers 35 are connected to the connecting rod 34 by means of the connecting rib 36 .

[0051] The two sides of the scraper 35 are in active contact with the inner wall of the filter tank 1 and the outer wall of the main filter screen 2 respectively.

[0052] In this embodiment, there are two scrapers 35, and the two scrapers 35 are in active contact with the outer wall of the main filter 2 and the inner wall of the filter tank 1 respectively. During the filtering process, by starting the reduction motor 31 to drive the scraper 35 to rotate, impurities adhering to the outer wall of the main filter 2 can be cleaned to ensure the filtering effect of the main filter 2.

[0053] It should be noted that after the filtration is completed, the two scrapers 35 are driven to rotate by starting the reduction motor 31 , and the impurities accumulated on the main filter screen 2 and deposited inside the filter tank 1 can be automatically cleaned in cooperation with the recoil mechanism 6 .

[0054] See also Figure 1 , Figure 2 and Figure 6 The filter hole adjustment mechanism 4 includes a driving motor 41 , a main shaft 42 , a driving wheel 43 , a driven shaft 44 , a driven wheel 45 and a synchronous belt 46 .

[0055] The driving motor 41 is fixedly mounted on the bottom of the outer side of the filter tank 1, and the output shaft of the driving motor 41 is connected to a main shaft 42, a driving wheel 43 is mounted on the bottom of the main shaft 42, the slave shaft 44 is movably mounted on the bottom of the filter tank 1, and a driven wheel 45 is mounted on the bottom of the slave shaft 44, and a synchronous belt 46 is mounted between the driven wheel 45 and the driving wheel 43.

[0056] By utilizing the synchronous belt 46 , when the driving motor 41 is started, the slave shaft 44 is rotated synchronously with the main shaft 42 .

[0057] The top of the slave shaft 44 is fixedly connected to the top of the inner wall of the auxiliary filter 5 .

[0058] In this embodiment, the driving motor 41 is utilized to drive the driving wheel 43 on the main shaft 42 to rotate, and the auxiliary filter 5 at the end of the slave shaft 44 is driven to rotate through the transmission of the synchronous belt 46, so that the filter holes of the auxiliary filter 5 are staggered with the filter holes of the main filter 2, thereby adjusting the filter hole size of the overall filtration structure composed of the main filter 2 and the auxiliary filter 5 to adapt to the extraction and filtration work of different drugs.

[0059] It should be noted that, in the present embodiment, the main filter 2 and the auxiliary filter 5 are both cylindrical. The cylindrical main filter 2 and the auxiliary filter 5 have a large filtering surface and a fast filtering rate. In other embodiments, the main filter 2 and the auxiliary filter 5 may be conical. In this case, the scraper 35 can be set at an inclined angle. The conical main filter 2 and the auxiliary filter 5 save materials, but the filtering efficiency is low, and they are suitable for filtering small flow drugs.

[0060] The recoil mechanism 6 includes a recoil pump 61 , a water inlet pipe 62 , a branch pipe 63 , a first solenoid valve 64 , a recoil pipe 65 , a fixing frame 66 and a recoil hole 67 .

[0061] The water inlet end of the recoil pump 61 is connected to a water inlet pipe 62 , and a branch pipe 63 is connected to the water inlet pipe 62 . A first solenoid valve 64 is disposed at the front end of the water inlet pipe 62 and on the branch pipe 63 .

[0062] In this embodiment, during the filtering process, by closing the first solenoid valve 64 on the water inlet pipe 62 and opening the first solenoid valve 64 on the branch pipe 63, the filtered medicine can be extracted by starting the backflush pump 61 and backflushed out through the backflush hole 67 opened on the shaft 44, so that the main filter screen 2 and the auxiliary filter screen 5 can be cleaned during the filtering process to prevent impurities from accumulating and clogging the main filter screen 2 and the auxiliary filter screen 5.

[0063] It should be noted that after the filtration is completed, the first solenoid valve 64 on the water inlet pipe 62 is opened, and the first solenoid valve 64 on the branch pipe 63 is closed. The backwash pump 61 can be started to extract cleaning water to flush the main filter screen 2, the auxiliary filter screen 5 and the inside of the filter tank 1.

[0064] The water outlet end of the backwash pump 61 is connected to a backwash pipe 65 . The fixing frame 66 is fixed to the bottom of the filter tank 1 . The backwash pipe 65 is fixed to the fixing frame 66 . The backwash hole 67 is formed on the slave shaft 44 .

[0065] The recoil pipe 65 is a hard pipe, and the position of the recoil pipe 65 is fixed by a fixing frame 66 to ensure the stability of the recoil pipe 65 .

[0066] The top of the filter tank 1 is provided with a liquid inlet pipe 8 for injecting medicine into the filter tank 1 .

[0067] A liquid outlet pipe 11 is provided at the bottom of the filter tank 1 .

[0068] In this embodiment, after being filtered through the main filter screen 2 , the medicine flows out through the liquid outlet 10 on the partition plate 9 , and finally is discharged from the filter tank 1 through the liquid outlet pipe 11 .

[0069] A sewage discharge pipe 12 located above the partition plate 9 is fixedly sleeved on the bottom of one side of the filter tank 1 .

[0070] The sewage pipe 12 is connected to the filter tank 1 , and the sewage impurities filtered by the main filter screen 2 and deposited in the filter tank 1 are discharged by using the sewage pipe 12 in cooperation with the backflushing mechanism 6 .

[0071] See also Figure 1 and Figure 5 A partition plate 9 is provided at the bottom of the inner cavity of the filter tank 1 , and a liquid outlet 10 is opened in the middle of the partition plate 9 .

[0072] In this embodiment, the partition plate 9 is used to separate the filter tank 1 into two upper and lower cavities. The upper cavity is used to hold the medicine and filtered impurities, and the lower cavity is used to discharge the filtered medicine.

[0073] It should be noted that the partition 9 is in a truncated cone shape, and the truncated cone-shaped partition 9 facilitates the discharge of the impurity wastewater that has settled and collected inside the filter tank 1 and is located above the partition 9 .

[0074] See also Figure 3 In this embodiment, the detection mechanism 7 includes a water pump 71, a connecting pipe 72, a liquid return pipe 73, a detection pipe 74, a turbidity sensor 75 and a second solenoid valve 76.

[0075] The liquid inlet end of the water pump 71 is connected to a connecting pipe 72, and the liquid outlet end of the water pump 71 is connected to a return pipe 73, a detection pipe 74 is provided on the return pipe 73, the turbidity sensor 75 is installed on the detection pipe 74, and two second solenoid valves 76 located at the liquid inlet end and the liquid outlet end of the detection pipe 74 are installed on the return pipe 73. One end of the connecting pipe 72 and the return pipe 73 are connected to the liquid outlet pipe 11.

[0076] During the filtering process, the water pump 71 is started to extract the filtered medicine into the detection tube 74, and the second solenoid valves 76 located on both sides of the detection tube 74 are closed, so that the impurity content in the filtered medicine is detected by using the turbidity sensor 75.

[0077] It should be noted that after the detection is completed, the medicine can be returned to the liquid outlet pipe 11 through the liquid return pipe 73 to avoid wasting the medicine.

[0078] The bottom of the main filter 2 is fixed to the top of the partition 9, and the auxiliary filter is movably sleeved inside the main filter 2.

[0079] See also Figure 2 and 4 In this embodiment, one end of the branch pipe 63 is connected to the liquid outlet pipe 11 , and one end of the recoil pipe 65 is movably sleeved inside the slave shaft 44 .

[0080] In order to prevent the recoil tube 65 from rotating with the slave shaft 44 , the end of the recoil tube 65 is movably sleeved inside the slave shaft 44 , thereby preventing the recoil tube 65 from rotating while connecting the recoil tube 65 and the slave shaft 44 .

[0081] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A biopharmaceutical extraction pressure filtration device, characterized in that: The invention comprises a filter tank (1), a main filter screen (2), an automatic cleaning mechanism (3), a filter hole adjustment mechanism (4), a secondary filter screen (5), a backwash mechanism (6) and a detection mechanism (7), wherein the main filter screen (2) is installed inside the filter tank (1) for filtering the liquid medicine, and the automatic cleaning mechanism (3) is arranged inside the filter tank (1) for cleaning the filtering surface of the main filter screen (2) and the inner wall of the filter tank (1); The auxiliary filter (5) is arranged on the inner side of the main filter (2), the filter hole adjustment mechanism (4) is connected to the auxiliary filter (5) and is used to drive the auxiliary filter (5) to rotate, and the backwash mechanism (6) is installed on the inner side of the auxiliary filter (5) and is used to backwash the main filter (2) and the auxiliary filter (5); The detection mechanism (7) is arranged outside the filter tank (1) and is used to detect the filtering effect of the liquid medicine; The filter hole adjustment mechanism (4) comprises a driving motor (41), a main shaft (42), a driving wheel (43), a slave shaft (44), a driven wheel (45) and a synchronous belt (46); the driving motor (41) is fixedly mounted on the bottom of the outer side of the filter tank (1), and the main shaft (42) is connected to the output shaft of the driving motor (41); the bottom of the main shaft (42) is equipped with a driving wheel (43); the slave shaft (44) is movably mounted on the bottom of the filter tank (1), and the bottom of the slave shaft (44) is equipped with a driven wheel (45); and a synchronous belt (46) is mounted between the driven wheel (45) and the driving wheel (43); The recoil mechanism (6) comprises a recoil pump (61), a water inlet pipe (62), a branch pipe (63), a first solenoid valve (64), a recoil pipe (65), a fixing frame (66) and a recoil hole (67); the water inlet end of the recoil pump (61) is connected to the water inlet pipe (62); the water inlet pipe (62) is connected to the branch pipe (63); the water inlet pipe (62) is located at the front end of the branch pipe (63) and the branch pipe (63) is provided with a first solenoid valve (64). A magnetic valve (64), a water outlet end of the recoil pump (61) is connected to a recoil pipe (65), the fixing frame (66) is fixed to the bottom of the filter tank (1), the recoil pipe (65) is fixed to the fixing frame (66), and the recoil hole (67) is provided on the slave shaft (44); one end of the branch pipe (63) is connected to the liquid outlet pipe (11), and one end of the recoil pipe (65) is movably sleeved inside the slave shaft (44); During the filtering process, by closing the first electromagnetic valve (64) on the water inlet pipe (62) and opening the first electromagnetic valve (64) on the branch pipe (63), the filtered medicine can be extracted by starting the backwash pump (61) and backwashed out through the backwash hole (67) opened on the shaft (44), so that the main filter screen (2) and the auxiliary filter screen (5) can be cleaned during the filtering process to prevent impurities from accumulating and clogging the main filter screen (2) and the auxiliary filter screen (5).

2. A biopharmaceutical extraction pressure filtration device according to claim 1, characterized in that: The automatic cleaning mechanism (3) comprises a reduction motor (31), a rotating shaft (32), a stirring blade (33), a connecting rod (34), a scraper (35) and a connecting rib (36); the reduction motor (31) is fixedly mounted on the top of the filter tank (1), and the output shaft of the reduction motor (31) is connected to the rotating shaft (32) via a coupling; the rotating shaft (32) is provided with a stirring blade (33) located inside the filter tank (1), and the bottom of the rotating shaft (32) is fixedly connected to the connecting rod (34); the middle of the scraper (35) is provided with a connecting rib (36), and the two sides of the scraper (35) are respectively in active contact with the inner wall of the filter tank (1) and the outer wall of the main filter screen (2); and the end of the connecting rod (34) is fixedly connected to the connecting rib (36).

3. A biopharmaceutical extraction pressure filtration device according to claim 1, characterized in that: The detection mechanism (7) comprises a water pump (71), a connecting pipe (72), a liquid return pipe (73), a detection pipe (74), a turbidity sensor (75) and a second electromagnetic valve (76); the liquid inlet end of the water pump (71) is connected to the connecting pipe (72), and the liquid outlet end of the water pump (71) is connected to the liquid return pipe (73); the liquid return pipe (73) is provided with a detection pipe (74); the turbidity sensor (75) is installed on the detection pipe (74); and the liquid return pipe (73) is provided with two second electromagnetic valves (76) located at the liquid inlet end and the liquid outlet end of the detection pipe (74).

4. A biopharmaceutical extraction pressure filtration device according to claim 1, characterized in that: The top of the filter tank (1) is provided with a liquid inlet pipe (8), and the bottom of the inner cavity of the filter tank (1) is provided with a partition (9), a liquid outlet (10) is provided in the middle of the partition (9), a liquid outlet pipe (11) is provided at the bottom of the filter tank (1), and a sewage discharge pipe (12) located above the partition (9) is fixedly sleeved at the bottom of one side of the filter tank (1).

5. The biopharmaceutical extraction pressure filtration device according to claim 1, characterized in that: The bottom of the main filter (2) is fixed to the top of the partition (9), and the auxiliary filter is movably sleeved inside the main filter (2).

6. A biopharmaceutical extraction pressure filtration device according to claim 1, characterized in that: The top of the slave shaft (44) is fixedly connected to the top of the inner wall of the auxiliary filter screen (5).

7. A biopharmaceutical extraction pressure filtration device according to claim 3, characterized in that: One end of the connecting pipe (72) and the liquid return pipe (73) are connected to the liquid outlet pipe (11).

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