Solvent filter press for drug test

Abstract

The utility model discloses a solvent filter press for a medicine test, and relates to the technical field related to the medicine test. The filter comprises a base, a filter pressing head, a funnel, a sealing cover and a filter cartridge, a beaker is placed above the base, the filter cartridge is arranged above the beaker, a filter frame is fixed in the filter cartridge, a filter membrane is fixed in the filter frame, the upper end of the filter cartridge is screwed in the sealing cover, the funnel is located above the sealing cover, a second filter bag is placed in an inner cavity of the funnel, and the filter pressing head is arranged above the funnel. The filter pressing head is sleeved with a first filter bag, and a pressing plate is fixed to the top of the filter pressing head; a pressurizing pipe is fixed to the periphery of the filter cylinder in a penetrating mode, a piston is movably inserted into the pressurizing pipe, and a push rod is fixed to the end, away from the filter cylinder, of the piston. The filter cartridge, the sealing cover, the filter membrane, the funnel, the filter bag I, the filter bag II, the filter pressing head, the base and the beaker are arranged, so that the problem that solvents with different solid contents cannot be subjected to filter pressing treatment is solved; and the whole structure of the filter press is not very large, so that the test space is occupied.

Description

Technical Field

[0001] The utility model belongs to the technical field related to pharmaceutical testing, and particularly relates to a solvent filter press used for pharmaceutical testing. Background Art

[0002] In the process of drug research and development and production, a large number of tests are required to ensure the desired efficacy and safety. Drugs are both solid and liquid. When conducting drug tests, most of them need to be processed and dissolved in the corresponding solvent, and then tested using professional equipment and other processes. However, the dissolution of solid drugs may not be sufficient, and there may be solid residues. Therefore, it is necessary to filter the solvent after dissolving the drug, but it still has the following disadvantages in actual use:

[0003] 1. During the test, if the amount of solvent is too large, the filtration time will be too long, and if the solid content is too much, it is easy to clog the filter material. Therefore, the conventional filtration method is not enough to meet the needs, and it is necessary to use the filter press and other methods for rapid filtration. For the filter press, it is mostly mechanical compression and increased pressure filtration. It is suitable for solvents with too much solid content, but it is not practical for solvents with a small amount of solid content. Therefore, it needs to be improved to make it suitable for different filter press effect needs;

[0004] 2. Since pharmaceutical tests are mostly carried out in laboratories and other places, the overall total amount is not large, so large filter presses are rarely used. It is not very practical to use electric drives for filtration, and it is also necessary to connect electrical wires, which affects the space occupied by the test bench. Utility Model Content

[0005] The utility model aims to provide a solvent filter press for pharmaceutical testing, which solves the problem that it is impossible to perform filter press treatment on solvents with different solid contents by arranging a filter cartridge, a sealing cover, a filter membrane, a funnel, a filter bag one, a filter bag two, a filter press head, a base, and a beaker; and the problem that the overall structure of the filter press should not be too large and occupy the test space is solved.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a solvent filter press for drug testing, comprising a base, a filter head, a funnel, a sealing cover and a filter cartridge, a beaker is placed above the base, a filter cartridge is arranged above the beaker, a filter frame is fixed in the filter cartridge, a filter membrane is fixed in the filter frame, the upper end of the filter cartridge is screwed into the sealing cover, the funnel is located above the sealing cover, a filter bag 2 is placed in the inner cavity of the funnel, a filter head is arranged above the funnel, a filter bag 1 is sleeved outside the filter head, and a pressing plate is fixed on the top of the filter head;

[0008] A pressurizing tube is fixedly passed through the peripheral side of the filter cartridge, a piston is movably inserted in the pressurizing tube, and a push rod is fixed at one end of the piston away from the filter cartridge.

[0009] Furthermore, a vertical plate is fixed to the upper end of the base, a top plate is fixed on the inner side of the vertical plate, a screw rod is vertically threadedly connected in the top plate, and the bottom end of the screw rod is rotatably connected to the top of the pressure plate.

[0010] Furthermore, a connecting plate is fixed on the inner side surface of the vertical plate below the top plate, and a supporting ring is fixed on one end of the connecting plate away from the vertical plate, and the supporting ring is sleeved outside the funnel.

[0011] Furthermore, a liquid outlet pipe is fixed at the bottom of the funnel, a valve is fixed on the liquid outlet pipe, and the bottom of the liquid outlet pipe is connected and fixed to the upper end of the sealing cover.

[0012] Furthermore, the position of the pressurizing tube is higher than the height of the filter membrane.

[0013] Furthermore, a porous plate is fixed in the funnel, and the bottom of the second filter bag is placed above the porous plate, and the upper end of the second filter bag extends out of the funnel.

[0014] Furthermore, the size of the filter bag one matches the inner cavity size of the filter bag two, and the inner cavity size of the filter bag one matches the size of the filter press head.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model solves the problem that it is impossible to perform filter press treatment on solvents with different solid contents by arranging a filter cartridge, a sealing cover, a filter membrane, a funnel, a filter bag 1, a filter bag 2 and a filter press head; for solvents with a relatively high solid content, the solvent is put into the filter bag 2 in the funnel, the screw is rotated to lower the filter press head, the filter bag 1 covers the filter bag 2, wraps the solvent inside the filter bag, and continues to press down to perform an extrusion-type mechanical filtration treatment on the solvent, so as to filter the solvent as much as possible; and for solvents with a relatively low solid content, such as the solvent filtered by the filter bag 2, it can be further introduced into the filter cartridge and filtered by the filter membrane in the filter cartridge, and at the same time, the piston can be pushed by the push rod to move toward the filter cartridge, thereby pressurizing the inside of the filter cartridge to achieve pressurized filtration.

[0017] 2. The utility model solves the problem that the overall structure of the filter press should not be too large and occupies test space by arranging the filter cartridge, base, beaker and funnel; the filter cartridge, base, beaker, funnel and other structures are relatively small, the whole is not powered by electricity, and no electrical wiring is required. The overall operation is simple and the work efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0019] Figure 1 It is a structural stereogram of a solvent filter press used for pharmaceutical testing;

[0020] Figure 2 A bottom view of a solvent filter press used for pharmaceutical testing;

[0021] Figure 3 This is the structural diagram of the base;

[0022] Figure 4 This is the structural diagram of the funnel after sectioning;

[0023] Figure 5 This is the structural diagram of the filter cartridge after cross-section;

[0024] Figure 6 is a bottom view of the cover;

[0025] Figure 7 This is a bottom view of the filter press head.

[0026] Reference numerals:

[0027] 1. Base; 101. Vertical plate; 102. Top plate; 103. Connecting plate; 1031. Support ring; 2. Filter press head; 201. Pressing plate; 202. Screw; 203. Filter bag one; 3. Funnel; 301. Liquid outlet pipe; 302. Valve; 303. Filter bag two; 304. Perforated plate; 4. Cover; 5. Filter cartridge; 501. Pressurized pipe; 502. Push rod; 503. Piston; 504. Filter frame; 505. Filter membrane; 6. Beaker. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] See also Figure 1-7 As shown, the utility model is a solvent filter press for drug testing, comprising a base 1, a filter head 2, a funnel 3, a sealing cover 4 and a filter cartridge 5. A beaker 6 is placed above the base 1, a filter cartridge 5 is arranged above the beaker 6, a filter frame 504 is fixed in the filter cartridge 5, and a filter membrane 505 is fixed in the filter frame 504. The upper end of the filter cartridge 5 is screwed into the sealing cover 4, the funnel 3 is located above the sealing cover 4, a filter bag 2 303 is placed in the inner cavity of the funnel 3, a filter head 2 is arranged above the funnel 3, a filter bag 1 203 is sleeved on the outside of the filter head 2, and a pressing plate 201 is fixed on the top of the filter head 2;

[0030] First, for the solvent with a high solid content, put it into the filter bag 2 303 in the funnel 3, then put the filter bag 1 203 outside the filter press 2, rotate the screw 202 to move the filter press 2 downward, at this time, the filter bag 1 203 covers the filter bag 2 303, covers the solvent inside, and continues to press down to perform an extrusion type mechanical filtration treatment on the solvent, so as to filter the solvent as much as possible, and the solvent is filtered by the filter bag 1 203 and the filter bag 2 303;

[0031] For solvents with less solid content, such as the solvent filtered by the second filter bag 303, it can be further introduced into the filter cartridge 5. If the second filter bag 303 is not suitable for filtration, the second filter bag 303 can be taken out, and the solvent can be directly injected from the funnel 3 and introduced into the filter cartridge 5 through the liquid outlet pipe 301, and filtered by the filter membrane 505 in the filter cartridge 5. At the same time, the piston 503 can be pushed by the push rod 502 to move toward the filter cartridge 5, thereby reducing its internal space, compressing the internal air, and realizing pressurization of the filter cartridge 5, and realizing pressurized filtration;

[0032] A pressurizing tube 501 is fixedly passed through the periphery of the filter cartridge 5, and a piston 503 is movably inserted in the pressurizing tube 501, and a push rod 502 is fixed to the end of the piston 503 away from the filter cartridge 5;

[0033] The piston 503 is pushed by the push rod 502 to move in the pressurized tube 501. When the piston 503 is close to the filter cartridge 5, the internal volume of the filter cartridge 5 is reduced, the air is compressed, and pressurized filtration is achieved, so that the solvent passes through the filter membrane 505 faster. Otherwise, the pressure is reduced.

[0034] A vertical plate 101 is also fixed to the upper end of the base 1, a top plate 102 is fixed to the inner side of the vertical plate 101, a screw rod 202 is vertically threadedly connected in the top plate 102, and the bottom end of the screw rod 202 is rotatably connected to the top of the pressing plate 201;

[0035] The base 1 and the vertical plate 101 and the top plate 102 thereon are all installation carriers. A screw rod 202 is installed in the top plate 102. When the screw rod 202 rotates, it descends, driving the bottom pressure plate 201 and the filter press head 2 to descend.

[0036] A connecting plate 103 is also fixed on the inner side of the vertical plate 101 below the top plate 102, and a support ring 1031 is fixed on one end of the connecting plate 103 away from the vertical plate 101, and the support ring 1031 is sleeved outside the funnel 3;

[0037] The support ring 1031 is used to support the funnel 3 , and the support ring 1031 cooperates with the connecting plate 103 to be connected to the vertical plate 101 .

[0038] A liquid outlet pipe 301 is fixed at the bottom of the funnel 3, and a valve 302 is fixed on the liquid outlet pipe 301. The bottom of the liquid outlet pipe 301 is fixedly connected with the upper end of the sealing cover 4. The solvent filtered by the funnel 3 is discharged through the liquid outlet pipe 301, and the valve 302 is closed after the liquid is discharged from the liquid outlet pipe 301 to prevent air leakage when the pressurizing pipe 501 is pressurized.

[0039] The position of the pressurizing pipe 501 is higher than the height of the filter membrane 505 ; it is used to pressurize the air above the filter membrane 505 .

[0040] A porous plate 304 is fixed in the funnel 3, and the bottom of the filter bag 2 303 is placed above the porous plate 304, and the upper end of the filter bag 2 303 extends out of the funnel 3;

[0041] The porous plate 304 is used to provide a certain support for the filter bag 2 303 to avoid the lack of support parts during mechanical filtration. The filter bag 2 303 extends out of the funnel 3 to prevent the solvent from leaking from the gap.

[0042] The size of filter bag 1 203 matches the inner cavity size of filter bag 2 303 , and the inner cavity size of filter bag 1 203 matches the size of filter press head 2 .

[0043] The specific working principle of the utility model is as follows: first, for the solvent with a high solid content, it is put into the filter bag 2 303 in the funnel 3, and then the filter bag 1 203 is sleeved on the outside of the filter press 2, and the screw 202 in the top plate 102 is rotated to make the pressing plate 201 and the filter press 2 move downward. At this time, the filter bag 1 203 covers the filter bag 2 303, covering the solvent inside it, and the screw 202 continues to be rotated downward, and the filter press 2 squeezes the filter bag 1 203 and the filter bag 2 303, and the solvent between the two is squeezed mechanically filtered, and then the solvent enters the filter cartridge 5 under the sealing cover 4 through the liquid outlet pipe 301, and then the valve 302 is closed, and the solvent in the filter cartridge 5 is filtered by the filter membrane 505. According to actual needs, the piston 503 can be pushed by the push rod 502 to move in the pressurized pipe 501. When the piston 503 is close to the filter cartridge 5, the internal volume of the filter cartridge 5 is reduced, the air is compressed, and pressurized filtration is achieved. Finally, the solvent filtered by the filter membrane 505 is received by the beaker 6.

[0044] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A solvent filter press for pharmaceutical testing, comprising a base (1), a filter press head (2), a funnel (3), a cover (4) and a filter cartridge (5), characterized in that: A beaker (6) is placed above the base (1), a filter cartridge (5) is arranged above the beaker (6), a filter frame (504) is fixed inside the filter cartridge (5), and a filter membrane (505) is fixed inside the filter frame (504), the upper end of the filter cartridge (5) is screwed into the sealing cover (4), the funnel (3) is located above the sealing cover (4), a filter bag 2 (303) is placed in the inner cavity of the funnel (3), a filter press (2) is arranged above the funnel (3), a filter bag 1 (203) is sleeved on the outside of the filter press (2), and a pressure plate (201) is fixed on the top of the filter press (2); A pressurizing tube (501) is fixedly passed through the circumference of the filter cartridge (5), a piston (503) is movably inserted in the pressurizing tube (501), and a push rod (502) is fixed to one end of the piston (503) away from the filter cartridge (5).

2. A solvent filter press for pharmaceutical testing according to claim 1, characterized in that: A vertical plate (101) is also fixed to the upper end of the base (1), a top plate (102) is fixed to the inner side surface of the vertical plate (101), a screw rod (202) is vertically threadedly connected inside the top plate (102), and the bottom end of the screw rod (202) is rotatably connected to the top of the pressure plate (201).

3. A solvent filter press for pharmaceutical testing according to claim 2, characterized in that: A connecting plate (103) is also fixed on the inner side surface of the vertical plate (101) below the top plate (102), and a supporting ring (1031) is fixed on one end of the connecting plate (103) away from the vertical plate (101), and the supporting ring (1031) is sleeved outside the funnel (3).

4. A solvent filter press for pharmaceutical testing according to claim 1, characterized in that: A liquid outlet pipe (301) is fixed at the bottom of the funnel (3), a valve (302) is fixed on the liquid outlet pipe (301), and the bottom of the liquid outlet pipe (301) is connected and fixed to the upper end of the sealing cover (4).

5. A solvent filter press for pharmaceutical testing according to claim 1, characterized in that: The position of the pressurizing tube (501) is higher than the height of the filter membrane (505).

6. A solvent filter press for pharmaceutical testing according to claim 1, characterized in that: A porous plate (304) is fixed inside the funnel (3), and the bottom of the second filter bag (303) is placed above the porous plate (304), and the upper end of the second filter bag (303) extends out of the funnel (3).

7. A solvent filter press for pharmaceutical testing according to claim 1, characterized in that: The size of the filter bag one (203) matches the inner cavity size of the filter bag two (303), and the inner cavity size of the filter bag one (203) matches the size of the filter press head (2).

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