Multi-layer medical filter with pre-disinfection function

Abstract

The invention discloses a medical multi-layer filter with a pre-disinfection function, the multi-layer filter comprises a support frame, a disinfection device, a flow guide device and a liquid inlet pipe, the disinfection device is connected with the support frame, an outlet of the liquid inlet pipe is communicated with a pipeline of the flow guide device, the flow guide device is fixedly connected with the support frame, and the disinfection device is communicated with the middle section of the liquid inlet pipe. The flow guide device comprises a plurality of shells, drainage pipes are arranged between the adjacent shells, the adjacent shells are communicated through the drainage pipes, the shells are vertically arranged, a medium in the shells flows from bottom to top, the whole filtering system is disinfected through the disinfection device before medicament filtering, it is ensured that a disinfectant can cover all filtering pipelines, and after disinfection is completed, the disinfectant can be disinfected through the disinfection device. The filter system is washed by pure water or cleaning liquid, residual disinfectant is removed, pollution to medicaments is avoided, and during filtering, multiple shells are arranged, and multi-layer filtering is adopted, so that the filtering quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of multi-layer filtration of medicaments, in particular to a multi-layer filter for medicaments and medicines with a pre-sterilization function. Background Art

[0002] Medicines are mainly used to prevent, treat and diagnose human diseases, including various types of preparations, tablets, etc. With the advancement of science and technology, the pharmaceutical industry has also developed accordingly.

[0003] However, when manufacturing medicines, the quality of filtration greatly affects the quality of the finished medicine. The filtration process of medicines is mainly to filter out some impurities in the medicines. The commonly used method is to filter with a filter membrane or filter mesh structure. This unidirectional flow filtration structure easily causes impurities to accumulate on the filter surface, causing the filter holes to be blocked and unable to be automatically cleaned. It requires manual shutdown to clear or replace, which affects the preparation efficiency of the medicine.

[0004] In addition, some existing auxiliary filtering equipment mostly uses scrapers to remove impurities, and the removal efficiency is not high. Summary of the invention

[0005] The object of the present invention is to provide a multi-layer filter for medicine with pre-sterilization function to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A multi-layer filter for medicine with a pre-disinfection function, the multi-layer filter comprises a support frame, a disinfection device, a guide device and a liquid inlet pipe, the disinfection device is connected to the support frame, the liquid inlet pipe outlet is connected to the guide device pipeline, the guide device and the support frame are tightly connected, the disinfection device is connected to the middle section of the liquid inlet pipe, the guide device comprises a plurality of shells, drainage pipes are arranged between adjacent shells, adjacent shells are connected through the drainage pipes, the shells are arranged vertically, and the medium in the shells flows from bottom to top.

[0008] The support frame serves as the main supporting carrier and is used to install and fix the disinfection device and the diversion device. The liquid inlet pipe is used to transport medical agents. Before filtering the agents, the entire filtration system is disinfected by the disinfection device to ensure that the disinfectant can cover all filters and pipelines. After the disinfection is completed, the filtration system is rinsed with pure water or cleaning fluid to remove residual disinfectant and avoid contamination of the agents. When filtering, multiple shells are set up and multi-layer filtration is adopted to improve the filtration quality.

[0009] Furthermore, the disinfection device includes a disinfectant tank, a flushing tank and a starter pump, the disinfectant tank and the flushing tank are respectively fastened to the support frame, the outlets of the disinfectant tank and the flushing tank are intermittently connected to the inlet of the starter pump, and the outlet of the starter pump is connected to the liquid inlet pipe;

[0010] During disinfection: the disinfectant tank is connected to the liquid inlet pipe through the starter pump, and the outlet of the flushing tank is blocked;

[0011] During flushing: the flushing tank is connected to the liquid inlet pipe through the starting pump, and the outlet of the disinfectant tank is blocked.

[0012] The disinfectant box and the flushing box are respectively fixed on the support frame. The disinfectant box is filled with disinfectant, and the flushing box is filled with pure water or cleaning liquid. The liquids in the disinfectant box and the flushing box are pumped by starting the pump. A stop valve is set at the connection point. Before filtering the agent, the disinfectant in the disinfectant box is first pumped into the diversion device by starting the pump to automatically disinfect the internal pipes. After the disinfection is completed, the valve connected to the disinfectant tank is closed, and the pure water or cleaning liquid in the flushing box is sent into the diversion device. The residual disinfectant is removed by flushing to ensure the cleanliness of the overall filtration system, and then the agent is transported into the diversion device through the liquid inlet pipe for layered filtration.

[0013] Furthermore, the flow guide device also includes a flow guide plate, a filter assembly and an ultrasonic generator. A flow guide cavity is provided on the shell, a liquid inlet is provided at the lower end of the flow guide cavity, a liquid outlet is provided on the side wall of the upper end of the flow guide cavity, the liquid outlet is connected to the liquid inlet of the adjacent shell through a drainage pipe, the flow guide plate and the filter assembly are arranged in sequence along the flow direction of the medium in the flow guide cavity, the ultrasonic generator is located at the top of the flow guide cavity, the output end of the ultrasonic generator faces the filter assembly, and the filter assembly is used to filter the medium;

[0014] A contraction channel, a flat channel and an expansion channel are arranged on the guide plate in sequence, and the contraction channel, the flat channel and the expansion channel are connected in sequence. An air duct is arranged outside the flat channel, and the air duct is connected with an air source.

[0015] The guide device is mainly used to filter the medicine. The shell provides a filtering space through the guide cavity. When the medicine enters the guide cavity, it flows upward along the guide cavity, passes through the guide plate and the filter assembly in sequence, and when passing through the guide plate, the diameter is first reduced through the shrinking and expanding channels with gradually changing diameters, and then enters the flat channel with the fastest flow rate. The air inlet and the gas source are connected to form a venturi-like tube, and the gas is sucked into the expanding channel with increasing diameter, and flows upward along the guide cavity. When the medicine containing bubbles passes through the filter assembly, the filter assembly filters out the solid impurities in the medicine. When the bubbles float above the filter assembly, ultrasonic cavitation is performed through an ultrasonic generator, and the ultrasonic wave drives the bubbles in the medicine to collapse and close sharply. During the process of collapse and closing sharply, the huge energy released drives the medicine to form a jet motion with strong impact force. Since the jet motion is located on the upper layer of the filter assembly, the motion generated by the jet deviates from the direction of medicine delivery, and the impurity particles deposited on the filter assembly are removed by the jet impact, thereby improving the continuous filtration efficiency.

[0016] Furthermore, the filter assembly includes a filter plate, a connecting rod and a guide ring. The connecting rod is tightly connected to the wall of the guide chamber. A plurality of filter plates are provided at the lower end of the connecting rod. The filter plates and the connecting rod are tightly connected. The plurality of filter plates are arranged in a ring shape. Angle plates are provided between adjacent filter plates. The angle plates are in sliding contact with the filter plates on both sides. The outer circle of the angle plates is connected to the guide ring. The guide ring is tightly connected to the guide chamber. A guide groove is provided on the guide ring. The outer side of one end of the filter plate is in contact with the guide groove. A card slot is provided on the filter plate. A filter membrane is provided in the card slot. The filter plate is gradually provided with a thickness. The filter hole diameters of the plurality of filter membranes gradually decrease along the filter level. The distance between the guide plate and the filter plate gradually decreases along the filter level.

[0017] The filter assembly adopts a split design, including several filter plates. The two filter plates are contact-sealed by angle plates. The angle plates are fixed on the guide rings. The filter plates are arranged in a ring shape, the inner sides are fixed to the connecting rods, and are fixed on the wall of the guide cavity. When the jet formed by cavitation hits the filter plate, the thickness of the filter plate gradually decreases toward the edge, and the mass and rigidity decrease, thereby increasing the amplitude at the far end and improving the efficiency of impurity separation. The filter membrane in each shell is used as a filter level, and graded filtration is performed by setting multiple filter levels. Along the direction of multi-layer filtration, the distance between the guide plate and the filter plate is reduced, that is, in the initial state, the distance between the two is the largest, and the bubbles have the largest floating stroke during the floating process. When passing through the filter membrane, the most and densest bubbles are generated. When the bubbles collapse, the impact is the largest. Solid particles smaller than this level will also impact the deposited impurities, thereby improving the efficiency of impurity removal.

[0018] Furthermore, the center thickness of the filter plate is greater than the edge thickness.

[0019] The middle of the filter plate is the fixed end, and the edge is the movable end. The amplitude formed at the edge is the largest, which facilitates acoustic cavitation in the middle.

[0020] Furthermore, the slot is arranged to be inclined, and the slot is located at a lower end close to one end of the connecting rod.

[0021] By setting the slot tilted, the filter membrane installed in the slot is also tilted. When the jetting agent passes through the filter membrane, the impurity particles are pushed to move outward tilted, avoiding affecting the flow of the agent guided by the guide plate.

[0022] As an optimization, a drop groove is provided on the guide plate, and the drop groove is an annular groove. When the impurity particles hit the wall of the guide cavity, they fall along the wall and enter the drop groove.

[0023] As an optimization, a sealing surface is provided on the outside of the filter plate, the sealing surface is arranged in an arc shape, and the sealing surface contacts the guide groove. By setting the sealing surface, the sealing surface contacts the guide groove, and local sealing is performed to prevent the leakage of the agent from the contact point and affect the filtering quality.

[0024] As an optimization, the guide groove is set in an arc shape, and the curvature of the guide groove and the sealing surface are adapted. The guide groove is adapted to the sealing surface so that surface contact can be achieved during partial sealing, thereby improving the sealing efficiency.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: after the medicine enters the guide cavity, it flows upward along the guide cavity, passes through the guide plate and the filter assembly in sequence, and when passing through the guide plate, the diameter is first reduced through the gradually decreasing and expanding channels, and then enters the flat channel with the fastest flow rate. The air inlet and the air source are connected to form a venturi-like tube, and the gas is sucked into the expanding channel with increasing diameter, and flows upward along the guide cavity. When the medicine containing bubbles passes through the filter assembly, the filter assembly filters out the solid impurities in the medicine. When the bubbles float above the filter assembly, ultrasonic cavitation is performed through the ultrasonic generator, and the ultrasonic wave band The bubbles in the medicine are driven to collapse and close rapidly. During the rapid collapse and closing process, the huge energy released drives the medicine to form a jet movement with strong impact force. Since the jet movement is located on the upper layer of the filter component, the movement generated by the jet deviates from the direction of medicine delivery. The impurity particles deposited on the filter component are removed by the jet impact, thereby improving the continuous filtration efficiency; the filter plate is arranged in a ring shape, the inner side is fixed to the connecting rod, and fixed on the wall of the guide cavity. When the jet impact formed by cavitation hits the filter plate, the thickness of the filter plate gradually decreases toward the edge, and the mass and stiffness decrease, thereby increasing the amplitude at the far end and improving the impurity separation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the structure of the flow guide device of the present invention;

[0029] Figure 3 is a schematic diagram of drug drainage of the present invention;

[0030] Figure 4 yes Figure 3 A magnified view of a part of the view;

[0031] Figure 5 It is a schematic diagram of the structure of the filter assembly of the present invention;

[0032] Figure 6 It is a schematic diagram of the self-cleaning of the filter membrane of the present invention;

[0033] In the figure: 1-support frame, 2-disinfection device, 21-disinfectant box, 22-flushing box, 23-starting pump, 3-guiding device, 31-shell, 311-guiding cavity, 312-liquid inlet, 313-liquid outlet, 32-guide plate, 321-contraction channel, 322-flat channel, 323-expansion channel, 324-air duct, 325-dropping chute, 33-filter component, 331-filter plate, 3311-card slot, 3312-sealing surface, 332-angle plate, 333-connecting rod, 334-guide ring, 3341-guide groove, 335-filter membrane, 34-ultrasonic generator, 35-drainage pipe, 4-liquid inlet pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention provides a technical solution:

[0036] like Figure 1-2 As shown, a multi-layer filter for medicine with a pre-disinfection function, the multi-layer filter includes a support frame 1, a disinfection device 2, a guide device 3 and a liquid inlet pipe 4, the disinfection device 2 is connected to the support frame 1, the outlet of the liquid inlet pipe 4 is connected to the guide device 3 pipeline, the guide device 3 and the support frame 1 are tightly connected, the disinfection device 2 is connected to the middle section of the liquid inlet pipe 4, the guide device 3 includes a plurality of shells 31, drainage pipes 35 are provided between adjacent shells 31, adjacent shells 31 are connected through the drainage pipes 35, the shells 31 are arranged vertically, and the medium in the shells 31 flows from bottom to top.

[0037] The support frame 1 is used as the main supporting carrier to install and fix the disinfection device 2 and the guide device 3. The liquid inlet pipe 4 is used to transport medical drugs. Before filtering the drugs, the entire filtration system is disinfected by the disinfection device 2 to ensure that the disinfectant can cover all filters and pipelines. After the disinfection is completed, the filtration system is rinsed with pure water or cleaning liquid to remove residual disinfectant and avoid contamination of the drugs. When filtering, multiple shells 31 are set and multi-layer filtration is adopted to improve the filtration quality.

[0038] like Figure 1-2 As shown, the disinfection device 2 includes a disinfectant tank 21, a flushing tank 22 and a starter pump 23. The disinfectant tank 21 and the flushing tank 22 are respectively fastened to the support frame 1. The outlets of the disinfectant tank 21 and the flushing tank 22 are intermittently connected to the inlet of the starter pump 23. The outlet of the starter pump 23 is connected to the liquid inlet pipe 4.

[0039] During disinfection: the disinfectant tank 21 is connected to the liquid inlet pipe 4 through the start pump 23, and the outlet of the flushing tank 22 is blocked;

[0040] During flushing: the flushing box 22 is connected to the liquid inlet pipe 4 through the starting pump 23, and the outlet of the disinfectant box 21 is cut off.

[0041] The disinfectant box 21 and the flushing box 22 are respectively fixed on the support frame 1. The disinfectant box 21 is filled with disinfectant, and the flushing box 22 is filled with pure water or cleaning liquid. The liquids in the disinfectant box 21 and the flushing box 22 are pumped by starting the pump 23. A stop valve is set at the connection point. Before filtering the agent, the disinfectant in the disinfectant box 21 is first pumped into the diversion device 3 by starting the pump 23, and the internal pipeline is automatically disinfected. After the disinfection is completed, the valve connected to the disinfectant box 21 is closed, and the pure water or cleaning liquid in the flushing box 22 is sent into the diversion device 3. The residual disinfectant is removed by flushing to ensure the cleanliness of the overall filtration system, and then the agent is transported into the diversion device 3 through the liquid inlet pipe 4 for layered filtration.

[0042] like Figure 2 to Figure 4 As shown, the flow guide device 3 also includes a flow guide plate 32, a filter assembly 33 and an ultrasonic generator 34. A flow guide chamber 311 is provided on the shell 31. A liquid inlet 312 is provided at the lower end of the flow guide chamber 311. A liquid outlet 313 is provided on the upper side wall of the flow guide chamber 311. The liquid outlet 313 is communicated with the liquid inlet 312 of the adjacent shell 31 through a drainage pipe 35. The flow guide plate 32 and the filter assembly 33 are arranged in sequence along the flow direction of the medium in the flow guide chamber 311. The ultrasonic generator 34 is located at the top of the flow guide chamber 311. The output end of the ultrasonic generator 34 faces the filter assembly 33. The filter assembly 33 is used to filter the medium.

[0043] The guide plate 32 is provided with a contraction channel 321, a flat channel 322 and an expansion channel 323 in sequence, and the contraction channel 321, the flat channel 322 and the expansion channel 323 are connected in sequence. An air duct 324 is provided outside the flat channel 322, and the air duct 324 is connected to an air source.

[0044] The guide device 3 is mainly used to filter the medicine. The shell 31 provides a filtering space through the guide cavity 311. When the medicine enters the guide cavity 311, it flows upward along the guide cavity 311, passes through the guide plate 32 and the filter assembly in sequence, and when passing through the guide plate 32, the diameter is first reduced through the gradually decreasing diameter channel 321 and the expanding channel 323, and enters the flat channel 322 with the fastest flow rate. The air inlet 324 is connected to the air source to form a venturi-like tube, which sucks the gas into the expanding channel 323 with increasing diameter, and flows upward along the guide cavity 311. When the medicine containing bubbles When the medicine passes through the filter component 33, the filter component 33 filters out the solid impurities in the medicine. When the bubbles float above the filter component 33, ultrasonic cavitation is performed through the ultrasonic generator 34. The ultrasonic wave drives the bubbles in the medicine to collapse and close rapidly. During the rapid collapse and closing process, the huge energy released drives the medicine to form a jet movement with strong impact force. Since the jet movement is located on the upper layer of the filter component 33, the movement generated by the jet deviates from the direction of medicine delivery. The impurity particles deposited on the filter component 33 are removed by the jet impact, thereby improving the continuous filtration efficiency.

[0045] like Figure 5 As shown, the filter assembly 33 includes a filter plate 331, a connecting rod 333 and a guide ring 334. The connecting rod 333 is tightly connected to the wall of the guide cavity 311. A plurality of filter plates 331 are arranged at the lower end of the connecting rod 333. The filter plates 331 and the connecting rod 333 are tightly connected. The plurality of filter plates 331 are arranged in a ring shape. Angle plates 332 are arranged between adjacent filter plates 331. The angle plates 332 are in sliding contact with the filter plates 331 on both sides. The outer circle of the angle plates 332 and the guide ring 334 are in contact with each other. The guide ring 334 and the guide cavity 311 are tightly connected, a guide groove 3341 is provided on the guide ring 334, the outer side of one end of the filter plate 331 is in contact with the guide groove 3341, a card slot 3311 is provided on the filter plate 331, a filter membrane 335 is provided in the card slot 3311, the filter plate 331 is gradually set in thickness, the filter hole diameters of the filter membranes 335 gradually decrease along the filtration level, and the distance between the guide plate 32 and the filter plate 331 gradually decreases along the filtration level.

[0046] The filter assembly 33 adopts a split design, including a plurality of filter plates 331. The two filter plates 331 are contact-sealed by an angle plate 332. The angle plate 332 is fixed on the guide ring 334. The filter plates 331 are arranged in a ring shape, and the inner side is fixed to the connecting rod 333 and fixed on the wall of the guide cavity 311. When the jet formed by cavitation impacts the filter plate 331, the thickness of the filter plate 331 gradually decreases toward the edge, and the mass and rigidity decrease, so that the amplitude at the far end increases, and the impurity separation efficiency is improved. The filter membrane 335 in each housing 31 is used as a filter level. By setting multiple filter levels for graded filtration, the distance between the guide plate 32 and the filter plate 331 is reduced along the direction of multi-layer filtration, that is, in the initial state, the distance between the two is the largest, and the bubble has the largest floating stroke during the floating process. When passing through the filter membrane, the most and densest bubbles are generated. When the bubble collapses, the impact is the largest. Solid particles smaller than this level will also impact the deposited impurities, thereby improving the removal efficiency of impurities.

[0047] like Figure 3 As shown, the center thickness of the filter plate 331 is greater than the edge thickness.

[0048] The middle part of the filter plate 331 is a fixed end, and the edge is a movable end. The amplitude formed at the edge is the largest, which facilitates acoustic cavitation in the middle part.

[0049] like Figure 6 As shown, the slot 3311 is tilted and is located at a lower end close to one end of the connecting rod 333 .

[0050] By tilting the card slot 3311 , the filter membrane 335 installed in the card slot 3311 is also tilted. When the jetting medicine passes through the filter membrane 335 , the foreign particles are pushed to move outwards obliquely, avoiding affecting the flow of the medicine guided by the guide plate 32 .

[0051] As an optimization, a material drop groove 325 is provided on the guide plate 32 , and the material drop groove 325 is an annular groove. When the foreign particles hit the wall surface of the guide cavity 311 , they fall along the wall surface and enter the material drop groove 325 .

[0052] As an optimization, a sealing surface 3312 is provided on the outside of the filter plate 331. The sealing surface 3312 is arranged in an arc shape, and the sealing surface 3312 contacts the guide groove 3341. By setting the sealing surface 3312, the sealing surface 3312 contacts the guide groove 3341, and local sealing is performed to prevent the medicine from leaking from the contact point and affecting the filtering quality.

[0053] As an optimization, the guide groove 3341 is arranged in an arc shape, and the curvature of the guide groove 3341 matches that of the sealing surface 3312. The guide groove 3341 matches the sealing surface 3312, so that surface contact can be achieved during partial sealing, thereby improving sealing efficiency.

[0054] The working principle of the present invention is as follows: after the medicine enters the guide cavity 311, it flows upward along the guide cavity 311, passes through the guide plate 32 and the filter assembly in sequence, and when passing through the guide plate 32, it first reduces its diameter through the gradually decreasing diameter channel 321 and the expanding channel 323, and enters the flat channel 322 with the fastest flow rate. The air inlet 324 is connected to the air source to form a venturi-like tube, and the gas is sucked into the expanding channel 323 with increasing diameter, and flows upward along the guide cavity 311. When the medicine containing bubbles passes through the filter assembly 33, the filter assembly 33 filters out the solid impurities in the medicine. When the bubbles float above the filter assembly 33, ultrasonic cavitation is performed through the ultrasonic generator 34, and the ultrasonic wave The bubbles in the medicine are driven to collapse and close rapidly. During the rapid collapse and closing process, the huge energy released drives the medicine to form a jet movement with strong impact force. Since the jet movement is located on the upper layer of the filter component 33, the movement generated by the jet deviates from the direction of medicine delivery. The impurity particles deposited on the filter component 33 are removed by the jet impact, thereby improving the continuous filtration efficiency; the filter plate 331 is arranged in a ring shape, and the inner side is fixed to the connecting rod 333 and fixed on the wall of the guide cavity 311. When the jet impact formed by cavitation hits the filter plate 331, the thickness of the filter plate 331 gradually decreases toward the edge, and the mass and stiffness are reduced, thereby increasing the amplitude at the far end and improving the impurity separation efficiency.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-layer filter for medicine with pre-sterilization function, characterized in that: The multi-layer filter comprises a support frame (1), a disinfection device (2), a flow guide device (3) and a liquid inlet pipe (4); the disinfection device (2) is connected to the support frame (1); the outlet of the liquid inlet pipe (4) is connected to a pipeline of the flow guide device (3); the flow guide device (3) and the support frame (1) are tightly connected; the disinfection device (2) is connected to the middle section of the liquid inlet pipe (4); the flow guide device (3) comprises a plurality of shells (31); drainage pipes (35) are provided between adjacent shells (31); adjacent shells (31) are connected via the drainage pipes (35); the shells (31) are arranged vertically; and the medium in the shells (31) flows from bottom to top.

2. A multi-layer filter for medicine with pre-sterilization function according to claim 1, characterized in that: The disinfection device (2) comprises a disinfectant box (21), a flushing box (22) and a starter pump (23); the disinfectant box (21) and the flushing box (22) are respectively firmly connected to the support frame (1); the outlets of the disinfectant box (21) and the flushing box (22) are intermittently connected to the inlet of the starter pump (23); and the outlet of the starter pump (23) is connected to the liquid inlet pipe (4); During disinfection: the disinfectant tank (21) is connected to the liquid inlet pipe (4) via the starter pump (23), and the outlet of the flushing tank (22) is blocked; During flushing: the flushing box (22) is connected to the liquid inlet pipe (4) through the starting pump (23), and the outlet of the disinfectant box (21) is blocked.

3. The multi-layer filter for medicine with pre-sterilization function according to claim 2, characterized in that: The flow guide device (3) further comprises a flow guide plate (32), a filter assembly (33) and an ultrasonic generator (34); a flow guide chamber (311) is provided on the shell (31); a liquid inlet (312) is provided at the lower end of the flow guide chamber (311); a liquid outlet (313) is provided on the side wall of the upper end of the flow guide chamber (311); the liquid outlet (313) is communicated with the liquid inlet (312) of the adjacent shell (31) through a drainage pipe (35); the flow guide plate (32) and the filter assembly (33) are arranged in sequence along the flow direction of the medium in the flow guide chamber (311); the ultrasonic generator (34) is located at the top of the flow guide chamber (311); the output end of the ultrasonic generator (34) faces the filter assembly (33); and the filter assembly (33) is used to filter the medium; The guide plate (32) is provided with a contraction channel (321), a flat channel (322) and an expansion channel (323) in sequence, the contraction channel (321), the flat channel (322) and the expansion channel (323) are connected in sequence, an air duct (324) is provided outside the flat channel (322), and the air duct (324) is connected to an air source.

4. The multi-layer filter for medicine with pre-sterilization function according to claim 3, characterized in that: The filter assembly (33) comprises a filter plate (331), a connecting rod (333) and a guide ring (334); the connecting rod (333) is tightly connected to the wall of the guide cavity (311); a plurality of filter plates (331) are arranged at the lower end of the connecting rod (333); the filter plates (331) and the connecting rod (333) are tightly connected; the plurality of filter plates (331) are arranged in a ring shape; angle plates (332) are arranged between adjacent filter plates (331); the angle plates (332) are in sliding contact with the filter plates (331) on both sides; the outer circle of the angle plates (332) and the guide ring (334) are in contact with each other; The guide ring (334) and the guide cavity (311) are connected in a row, the guide ring (334) and the guide cavity (311) are tightly connected, the guide ring (334) is provided with a guide groove (3341), the outer side of one end of the filter plate (331) is in contact with the guide groove (3341), the filter plate (331) is provided with a clamping groove (3311), a filter membrane (335) is arranged in the clamping groove (3311), the filter plate (331) is gradually thickened, the filter hole diameters of the filter membranes (335) gradually decrease along the filter level, and the distance between the guide plate (32) and the filter plate (331) gradually decreases along the filter level.

5. The multi-layer filter for medicine with pre-sterilization function according to claim 4, characterized in that: The center thickness of the filter plate (331) is greater than the edge thickness.

6. The multi-layer filter for medicine with pre-sterilization function according to claim 5, characterized in that: The clamping slot (3311) is arranged obliquely, and the clamping slot (3311) is located at a lower end close to one end of the connecting rod (333).

7. The multi-layer filter for medicine with pre-sterilization function according to claim 6, characterized in that: The guide plate (32) is provided with a material dropping groove (325), and the material dropping groove (325) is an annular groove.

8. The multi-layer filter for medicine with pre-sterilization function according to claim 6, characterized in that: A sealing surface (3312) is provided on the outside of the filter plate (331), and the sealing surface (3312) is arranged in an arc shape, and the sealing surface (3312) is in contact with the guide groove (3341).

9. The multi-layer filter for medicine with pre-sterilization function according to claim 8, characterized in that: The guide groove (3341) is arranged in an arc shape, and the curvatures of the guide groove (3341) and the sealing surface (3312) are adapted.

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