Multi-stage fine filtration equipment for preparing fructose diphosphate sodium sterile powder

Abstract

The invention relates to the technical field of filtering equipment, in particular to multistage fine filtering equipment for preparing fructose diphosphate sterile powder, which comprises a barrel and an end cover arranged at the top of the barrel, and a liquid inlet pipe and a liquid outlet pipe are respectively arranged on two sides of the barrel. The cams on the lifting rotating shaft are driven by the driving mechanism to synchronously rotate and ascend and descend, and in the descending process of the lifting rotating shaft and the cams, the swing disc is eccentrically pushed in an outward trend, so that the swing grinding heads below the swing disc deflect and swing together around the swing ball, and the grinding efficiency is improved. Further, the viscous particles possibly attached to the grinding expansion grooves in the grinding holes are further crushed, and the filtering effect is kept; and in the ascending process of the lifting rotating shaft and the cam, the cam continuously stirs the filtrate accumulated in the middle, so that small-aperture particles, bacteria and other impurities which are preliminarily filtered are prevented from being accumulated on the upper surfaces of a filtering inner plate and a filtering outer plate in the graded filtrate mounting seat, and the sterile environment in the preparation process is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of filtering equipment, in particular to a multi-stage fine filtering equipment for preparing sterile fructose sodium diphosphate powder. Background Art

[0002] In the process of preparing sterile sodium fructose diphosphate powder, fine filtration equipment is required to ensure the purity and sterility of the final product. The existing technology usually uses a combination of multi-level progressive microporous filter membranes to filter out impurities such as particles and bacteria that are larger than the pore size.

[0003] For example, the Chinese patent application number CN202211514785.5 discloses a high-precision filtering device based on a rotating filter membrane, including a frame, on which a filter tank and a piping system are arranged; a rotating shaft is rotatably arranged on the frame, on which a rotating filter membrane with a closed cavity is installed; a cavity connected to the cavity is opened in the rotating shaft, and the cavity extends upward from the rotating shaft to form a flow channel; the rotating filter membrane is driven to rotate by the rotating shaft, so that the cleaning solution in the filter tank cleans the side wall of the filter tank and the rotating filter membrane, so as to achieve the purpose of cleaning the filter tank and the rotating filter membrane. However, since the filtrate of sodium fructose diphosphate has a certain degree of adhesion, it is very easy to clog the filter membrane medium. In the process of using the fine filtration equipment to prepare sterile sodium fructose diphosphate powder, the centrifugal force near the edge of the filter membrane is relatively large, which can achieve the purpose of cleaning. However, due to the poor centrifugal effect near the middle area, a local sticky filter cake is easily formed, which increases the filtration resistance. In addition, since there is no stirring effect in the filtration area filled with filtrate, impurities such as small-pore particles and bacteria that have passed through the filter membrane medium are accumulated on the upper surface of the filter membrane medium. Even if the filter membrane medium is backwashed regularly, there will still be residues, making it difficult to maintain a sterile environment. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a multi-stage fine filtration equipment for preparing sterile fructose sodium diphosphate powder, so as to solve the technical problems that the centrifugal effect of the filter membrane near the middle area of ​​the prior art is poor, which easily forms a local sticky filter cake, increases the filtration resistance, and there is no stirring effect in the filtration area, resulting in impurities remaining.

[0005] Based on the above purpose, the present invention provides a multi-stage fine filtration device for preparing sterile fructose disodium phosphate powder, comprising a cylinder and an end cover arranged on the top of the cylinder, a liquid inlet pipe and a liquid outlet pipe are respectively arranged on both sides of the cylinder, a sewage pump is installed at the bottom of the cylinder, the cylinder is detachable, and the multi-stage fine filtration device also includes:

[0006] A graded filtrate mounting seat, wherein the graded filtrate mounting seats are provided in a plurality and are all hollow structures, the plurality of graded filtrate mounting seats are evenly distributed in the cylinder from top to bottom, the upper end surface of the graded filtrate mounting seat is a curved concave structure, the graded filtrate mounting seat is provided with a plurality of evenly distributed grinding holes, the grinding holes are through-set on the graded filtrate mounting seat, and a trumpet-shaped grinding expansion slot is provided at the upper end of the grinding hole;

[0007] A lifting shaft, the lifting shaft being liftable and arranged on the end cover;

[0008] A filter inner plate, the filter inner plate being inserted into the cavity of the graded filtrate mounting seat;

[0009] A filter outer plate, the filter outer plate being detachably mounted on the bottom of the graded filtrate mounting seat;

[0010] A swinging grinding head, the swinging grinding head cooperates with the grinding expansion slot;

[0011] A driving mechanism for driving the lifting shaft to lift;

[0012] A swing mechanism is used to drive the swing grinding head to swing in the grinding expansion slot.

[0013] Furthermore, the driving mechanism comprises:

[0014] A driving motor, wherein the driving motor is mounted on the end cover via a mounting plate;

[0015] A long gear, wherein the long gear is mounted on the output end of the driving motor;

[0016] A rotating cylinder, the rotating cylinder is coaxially fixedly mounted on the lifting shaft, the upper end surface of the rotating cylinder is a guide inclined surface with a height difference, and the outer end surface of the rotating cylinder is mounted with a gear ring, which meshes with the long gear;

[0017] A slide bar, the slide bar is slidably arranged on the end cover, the slide bar is kept in non-rotational directional vertical sliding through the guide opening, and a connecting block is installed at the lower end of the slide bar;

[0018] A spring, wherein the spring is sleeved on the slide bar, one end of the spring abuts against the upper protruding end of the slide bar, and the other end of the spring abuts against the upper surface of the end cover;

[0019] An upper roller, the upper roller being mounted on the lower surface of the end cover, the upper roller being matched with the upper guide inclined surface of the rotating cylinder;

[0020] A lower roller is installed on the connecting block, and the lower roller matches with the lower end surface of the rotating cylinder.

[0021] Furthermore, the swing mechanism comprises:

[0022] A swinging disc, wherein the side ends of the swinging disc are evenly provided with a plurality of tension springs, the other ends of the plurality of tension springs are connected to the inner wall of the cylinder through a fixing block, a countersunk groove is provided in the middle of the swinging disc, and there is no rigid contact between the middle of the swinging disc and the lifting shaft;

[0023] A cam, wherein the cam is mounted on the lifting shaft, and the outer edge of the cam with a small diameter matches the inner wall of the countersunk groove;

[0024] The swinging balls are in a plurality of numbers, and the plurality of swinging balls are movably mounted on the lower end surface of the swinging disc, and the swinging grinding head is mounted on the lower end of the swinging balls.

[0025] Furthermore, the lengths of the plurality of swing grinding heads gradually decrease from the inside to the outside, and the plurality of swing grinding heads are in a synchronous state on the grinding expansion slot.

[0026] Furthermore, when the lifting shaft is in an ascending state, the cam is disengaged from the inner wall of the countersunk groove, and the cam is placed in the filtering area between two adjacent graded filtrate mounting seats to stir the filtrate in the filtering area.

[0027] Furthermore, when the lifting shaft is in an ascending state, under the tension of several tension springs, the swing disc is in the middle, and several swing grinding heads are in a vertical state and placed in the grinding hole to isolate the adjacent upper and lower filtering areas of the graded filtrate mounting seat.

[0028] Furthermore, the lower end of the cam and the top side ridges of the countersunk groove are both chamfered. When the lifting shaft is in a descending state, the outer edge of the cam cooperates with the inner wall of the countersunk groove through the chamfered side ridges, so that the tension spring on the side opposite to the outer edge of the cam's minor diameter is in a stretched state, and the tension spring on the side corresponding to the outer edge of the cam's minor diameter is in a compressed state.

[0029] Furthermore, when the lifting shaft is in a descending state, a plurality of the swing grinding heads perform a swinging motion on the grinding expansion slot.

[0030] Furthermore, a partition plate is provided in the cylinder body, the upper area of ​​the partition plate is a closed cavity, the rotating cylinder is placed in the closed cavity, the lower area of ​​the partition plate is a sterile fine filtration area, the liquid outlet pipe is placed at the top of the sterile fine filtration area, and the liquid inlet pipe is placed at the bottom of the sterile fine filtration area.

[0031] Furthermore, a protective cover is detachably mounted on the end cover, and a leaked portion of the lifting shaft on the end cover is placed in the protective cover.

[0032] The beneficial effects of the present invention are as follows: when a multi-stage fine filtration device for preparing sterile fructose sodium diphosphate powder of the present invention is used, the driving mechanism drives the cams on the lifting shaft to rotate and lift synchronously, and in the process of the lifting shaft and the cam descending, the swing disc is eccentrically pushed outward, so that the swing grinding head below the swing disc is collectively deflected and swung around the swing ball, and then the sticky particles that may be attached to the grinding expansion groove on the grinding hole are further crushed to maintain the filtering effect; and in the process of the lifting shaft and the cam rising, the cam continuously stirs the filtrate accumulated in the middle, so as to avoid the accumulation of small-pore particles, bacteria and other impurities after preliminary filtration on the upper surface of the filter inner plate and the filter outer plate in the graded filtrate mounting seat, thereby ensuring a sterile environment during the preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of the present invention;

[0035] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0036] Figure 3 It is a side view of the internal structure of the present invention;

[0037] Figure 4 It is a schematic diagram of the assembly of the driving mechanism, the lifting shaft and the cam in the present invention;

[0038] Figure 5 It is a bottom view of the assembly of the swing mechanism and the graded filtrate mounting seat in the present invention;

[0039] Figure 6 It is a top view of the assembly of the swing mechanism and the graded filtrate mounting seat in the present invention.

[0040] The markings in the figure are:

[0041] 1. Cylinder; 2. End cover; 3. Liquid inlet pipe; 4. Liquid outlet pipe; 5. Sewage pump; 6. Graded filtrate mounting seat; 7. Grinding hole; 8. Grinding expansion slot; 9. Lifting shaft; 10. Filter inner plate; 11. Filter outer plate; 12. Swinging grinding head; 13. Driving motor; 14. Mounting plate; 15. Long gear; 16. Rotating cylinder; 17. Guide ramp; 18. Gear ring; 19. Sliding rod; 20. Connecting block; 21. Spring; 22. Upper roller; 23. Lower roller; 24. Swinging disc; 25. Tension spring; 26. Fixed block; 27. Countersunk groove; 28. Cam; 29. ​​Swinging ball; 30. Partition plate; 31. Enclosed cavity; 32. Aseptic fine filtration area; 33. Protective cover. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0043] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] The embodiment of the present invention provides a multi-stage fine filtration device for preparing sterile fructose sodium diphosphate powder, such as Figure 1-6 As shown, it includes a cylinder 1 and an end cover 2 arranged on the top of the cylinder 1, a liquid inlet pipe 3 and a liquid outlet pipe 4 are respectively arranged on both sides of the cylinder 1, a sewage pump 5 is installed at the bottom of the cylinder 1, and the cylinder 1 is detachable. The multi-stage fine filtration equipment also includes:

[0045] A grading filtrate mounting seat 6, which has a plurality of grading filtrate mounting seats 6 and all of which are of a cavity structure, is evenly distributed in the cylinder 1 from top to bottom, and the upper end surface of the grading filtrate mounting seat 6 is a curved concave structure, and a plurality of evenly distributed grinding holes 7 are opened on the grading filtrate mounting seat 6, and the grinding holes 7 are through-set on the grading filtrate mounting seat 6, and a trumpet-shaped grinding expansion slot 8 is set at the upper end of the grinding hole 7;

[0046] A lifting shaft 9, which can be lifted and lowered on the end cover 2;

[0047] The filter inner plate 10 is inserted into the cavity of the graded filtrate mounting seat 6;

[0048] A filter outer plate 11, which is detachably arranged at the bottom of the graded filtrate mounting seat 6;

[0049] A swinging grinding head 12, the swinging grinding head 12 cooperates with the grinding expansion slot 8;

[0050] A driving mechanism for driving the lifting shaft 9 to lift;

[0051] A swing mechanism is used to drive the swing grinding head 12 to swing in the grinding expansion slot 8.

[0052] In this embodiment, the driving mechanism includes:

[0053] A driving motor 13, the driving motor 13 is mounted on the end cover 2 through a mounting plate 14;

[0054] A long gear 15, which is mounted on the output end of the driving motor 13;

[0055] The rotating cylinder 16 is coaxially fixedly mounted on the lifting shaft 9. The upper end surface of the rotating cylinder 16 is a guide inclined surface 17 with a height difference. The outer end surface of the rotating cylinder 16 is equipped with a gear ring 18, which meshes with the long gear 15.

[0056] A slide bar 19 is slidably disposed on the end cover 2. The slide bar 19 is kept in a non-rotating directional vertical sliding state through the guide opening. A connecting block 20 is installed at the lower end of the slide bar 19.

[0057] A spring 21, wherein the spring 21 is sleeved on the slide bar 19, one end of the spring 21 abuts against the upper protruding end of the slide bar 19, and the other end of the spring 21 abuts against the upper surface of the end cover 2;

[0058] An upper roller 22, which is mounted on the lower surface of the end cover 2, and matches with the upper guide slope 17 of the rotating cylinder 16;

[0059] The lower roller 23 is mounted on the connecting block 20 , and the lower roller 23 matches with the lower end surface of the rotating cylinder 16 .

[0060] In this embodiment, the swing mechanism includes:

[0061] A swinging disc 24, the side ends of which are uniformly provided with a plurality of tension springs 25, the other ends of which are all connected to the inner wall of the cylinder 1 through a fixing block 26, a countersunk groove 27 is provided in the middle of the swinging disc 24, and there is no rigid contact between the middle of the swinging disc 24 and the lifting shaft 9;

[0062] Cam 28, cam 28 is installed on the lifting shaft 9, and the small diameter outer edge of cam 28 matches the inner wall of countersunk groove 27;

[0063] There are several swinging balls 29 , and the swinging balls 29 are movably mounted on the lower end surface of the swinging disc 24 , and the swinging grinding head 12 is mounted on the lower end of the swinging balls 29 .

[0064] In this embodiment, the lengths of the plurality of oscillating grinding heads 12 gradually decrease from the inside to the outside, and the plurality of oscillating grinding heads 12 are in a synchronous state on the grinding expansion slot 8 .

[0065] However, since the filtrate of sodium fructose diphosphate has a certain degree of adhesion, it is very easy to clog the filter membrane medium. In the process of using the fine filtration equipment to prepare sterile sodium fructose diphosphate powder, the centrifugal force near the edge of the filter membrane is relatively large, which can achieve the purpose of cleaning, but the centrifugal effect near the middle area is poor, which is easy to form a local sticky filter cake, which increases the filtration resistance. In addition, since there is no stirring effect in the filtration area filled with filtrate, impurities such as small pores of the filter membrane medium, bacteria, etc., are accumulated on the upper surface of the filter membrane medium. Even if the filter membrane medium is backwashed regularly, there will still be residues, making it difficult to maintain a sterile environment.

[0066] In this embodiment, when in use, the sodium fructose diphosphate stock solution to be filtered is delivered into the cylinder 1 through the liquid inlet pipe 3 by the liquid delivery pump, and the driving motor 13 is started so that its output end drives the long gear 15 to rotate, and drives the rotating cylinder 16 to rotate synchronously through the gear ring 18. Since the upper end surface of the rotating cylinder 16 is a guide inclined surface 17 with a height difference, and under the action of the elastic force of the spring 21 itself, the upper roller 22 and the lower roller 23 can be abutted against the two sides of the guide inclined surface 17, and with the rotation of the rotating cylinder 16, the lifting shaft 9 is rotated and lifted, and then the various cams 28 on the lifting shaft 9 are driven to rotate and lift synchronously;

[0067] Since the upper end surface of the graded filtrate mounting seat 6 is a curved concave structure, after preliminary filtration by the filter inner plate 10 and the filter outer plate 11 in the graded filtrate mounting seat 6 below, the filtrate will expand and surge outward from the middle of the graded filtrate mounting seat 6. During the process of the lifting shaft 9 and the cam 28 descending, the small diameter outer edge of the cam 28 cooperates with the inner wall of the countersunk groove 27. As the cam 28 rotates, the swing disc 24 is eccentrically pushed outward, so that the swing grinding head 12 below the swing disc 24 is collectively deflected and swung around the swing ball 29, and the sticky particles that may be attached to the grinding expansion groove 8 on the grinding hole 7 are further crushed, thereby avoiding the formation of local sticky filter cakes near the middle area caused by the traditional centrifugal filtration method, and maintaining the filtering effect;

[0068] During the rising process of the lifting shaft 9 and the cam 28, the outer edge of the cam 28 is separated from the countersunk groove 27. Under the pulling force of the tension springs 25 around the swing disc 24, the swing disc 24 is in the center position. Under its own weight, the swing grinding heads 12 at the lower ends of the swing balls 29 are placed in the grinding holes 7 to form a blocking effect on the graded filtrate mounting seat 6. When the cam 28 is placed between two adjacent 6, it still maintains a rotating effect, thereby continuously stirring the filtrate accumulated in the middle, thereby preventing small-pore particles, bacteria and other impurities after preliminary filtration from accumulating on the upper surfaces of the filter inner plate 10 and the filter outer plate 11 in the graded filtrate mounting seat 6. The step-by-step processing of the above-mentioned actions realizes a multi-stage fine filtration effect on the fructose sodium diphosphate stock solution.

[0069] In this embodiment, when the lifting shaft 9 is in the ascending state, the cam 28 is disengaged from the inner wall of the countersunk groove 27, and the cam 28 is placed in the filtering area between two adjacent graded filtrate mounting seats 6 to stir the filtrate in the filtering area.

[0070] In this embodiment, when the lifting shaft 9 is in the ascending state, under the tension of several tension springs 25, the swing disc 24 is in the middle, and several swing grinding heads 12 are in the vertical state and placed in the grinding hole 7 to isolate the adjacent filtering areas above and below the graded filtrate mounting seat 6.

[0071] In this embodiment, the lower end of the cam 28 and the top side ridges of the countersunk groove 27 are both chamfered. When the lifting shaft 9 is in the descending state, the outer edge of the cam 28 cooperates with the inner wall of the countersunk groove 27 through the chamfered side ridges, so that the tension spring 25 on the side opposite to the small diameter outer edge of the cam 28 is in a stretched state, and the tension spring 25 on the side corresponding to the small diameter outer edge of the cam 28 is in a compressed state.

[0072] In this embodiment, when the lifting shaft 9 is in the descending state, a plurality of swing grinding heads 12 perform a swinging motion on the grinding expansion slot 8 .

[0073] In this embodiment, if Figure 2 As shown, a partition plate 30 is provided in the cylinder body 1, the upper area of ​​the partition plate 30 is a closed chamber 31, the rotating cylinder 16 is placed in the closed chamber 31, the lower area of ​​the partition plate 30 is a sterile fine filtration area 32, the liquid outlet pipe 4 is placed at the top of the sterile fine filtration area 32, and the liquid inlet pipe 3 is placed at the bottom of the sterile fine filtration area 32.

[0074] In this embodiment, if Figure 1 , Figure 2 As shown, a protective cover 33 is detachably mounted on the end cover 2, and the leaked portion of the lifting shaft 9 on the end cover 2 is placed in the protective cover 33 to ensure the sterility effect during the fine filtration process.

[0075] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0076] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-stage fine filtration device for preparing sterile fructose sodium diphosphate powder, comprising a cylinder (1) and an end cover (2) arranged on the top of the cylinder (1), a liquid inlet pipe (3) and a liquid outlet pipe (4) are respectively arranged on both sides of the cylinder (1), and a sewage pump (5) is installed at the bottom of the cylinder (1), characterized in that: The cylinder (1) is detachable, and the multi-stage fine filtration equipment further comprises: A grading filtrate mounting seat (6), wherein the grading filtrate mounting seats (6) are in a plurality and are all of a hollow structure, the plurality of grading filtrate mounting seats (6) are evenly distributed in the cylinder (1) from top to bottom, the upper end surface of the grading filtrate mounting seat (6) is a curved concave structure, the grading filtrate mounting seat (6) is provided with a plurality of evenly distributed grinding holes (7), the grinding holes (7) are through-set on the grading filtrate mounting seat (6), and a trumpet-shaped grinding expansion groove (8) is provided at the upper end of the grinding hole (7); A lifting shaft (9), wherein the lifting shaft (9) is liftably disposed on the end cover (2); A filter inner plate (10), the filter inner plate (10) being inserted into the cavity of the graded filtrate mounting seat (6); A filter outer plate (11), the filter outer plate (11) being detachably mounted on the bottom of the graded filtrate mounting seat (6); A swinging grinding head (12), wherein the swinging grinding head (12) cooperates with the grinding expansion slot (8); A driving mechanism for driving the lifting shaft (9) to lift and lower; A swing mechanism is used to drive the swing grinding head (12) to swing in the grinding expansion slot (8).

2. A multi-stage fine filtration device for preparing sterile fructose disodium phosphate powder according to claim 1, characterized in that: The driving mechanism comprises: A drive motor (13), wherein the drive motor (13) is mounted on the end cover (2) via a mounting plate (14); A long gear (15), wherein the long gear (15) is mounted on the output end of the driving motor (13); A rotating cylinder (16), the rotating cylinder (16) is coaxially fixedly mounted on the lifting shaft (9), the upper end surface of the rotating cylinder (16) is a guide inclined surface (17) with a height difference, and the outer end surface of the rotating cylinder (16) is mounted with a gear ring (18), and the gear ring (18) is meshed with the long gear (15); A slide bar (19), the slide bar (19) is slidably arranged on the end cover (2), the slide bar (19) maintains non-rotational directional vertical sliding through the guide opening, and a connecting block (20) is installed at the lower end of the slide bar (19); A spring (21), wherein the spring (21) is sleeved on the slide bar (19), one end of the spring (21) abuts against the upper protruding end of the slide bar (19), and the other end of the spring (21) abuts against the upper surface of the end cover (2); An upper roller (22), the upper roller (22) being mounted on the lower surface of the end cover (2), the upper roller (22) being matched with the upper end guide inclined surface (17) of the rotating cylinder (16); A lower roller (23), the lower roller (23) is mounted on the connecting block (20), and the lower roller (23) matches with the lower end surface of the rotating cylinder (16).

3. A multi-stage fine filtration device for preparing sterile fructose disodium phosphate powder according to claim 2, characterized in that: The swing mechanism comprises: A swinging disc (24), wherein a plurality of tension springs (25) are evenly distributed on the side ends of the swinging disc (24), the other ends of the plurality of tension springs (25) are connected to the inner wall of the cylinder (1) through a fixing block (26), a countersunk groove (27) is provided in the middle of the swinging disc (24), and there is no rigid contact between the middle of the swinging disc (24) and the lifting shaft (9); A cam (28), wherein the cam (28) is mounted on the lifting shaft (9), and the small-diameter outer edge of the cam (28) matches the inner wall of the countersunk groove (27); A swinging ball (29), wherein there are a plurality of swinging balls (29), and the plurality of swinging balls (29) are movably mounted on the lower end surface of the swinging disc (24), and the swinging grinding head (12) is mounted on the lower end of the swinging ball (29).

4. The multi-stage fine filtration equipment for preparing sterile fructose disodium phosphate powder according to claim 1, characterized in that: The lengths of the plurality of swing grinding heads (12) gradually decrease from the inside to the outside, and the plurality of swing grinding heads (12) are in a synchronous state on the grinding expansion slot (8).

5. The multi-stage fine filtration equipment for preparing sterile fructose disodium phosphate powder according to claim 3, characterized in that: When the lifting shaft (9) is in an ascending state, the cam (28) is disengaged from the inner wall of the countersunk groove (27), and the cam (28) is placed in the filtering area between two adjacent graded filtrate mounting seats (6) to stir the filtrate in the filtering area.

6. A multi-stage fine filtration equipment for preparing sterile fructose disodium phosphate powder according to claim 5, characterized in that: When the lifting shaft (9) is in an ascending state, under the pulling force of the plurality of tension springs (25), the swing disc (24) is in the middle, and the plurality of swing grinding heads (12) are in a vertical state and placed in the grinding hole (7) to isolate the adjacent filtering areas above and below the graded filtrate mounting seat (6).

7. The multi-stage fine filtration equipment for preparing sterile fructose disodium phosphate powder according to claim 3, characterized in that: The lower end of the cam (28) and the top side ridges of the countersunk groove (27) are both chamfered. When the lifting shaft (9) is in a descending state, the outer edge of the cam (28) cooperates with the inner wall of the countersunk groove (27) through the chamfered side ridges, so that the tension spring (25) on the side opposite to the small diameter outer edge of the cam (28) is in a stretched state, and the tension spring (25) on the side corresponding to the small diameter outer edge of the cam (28) is in a compressed state.

8. The multi-stage fine filtration equipment for preparing sterile fructose disodium phosphate powder according to claim 7, characterized in that: When the lifting shaft (9) is in a descending state, a plurality of the swing grinding heads (12) perform a swinging motion on the grinding expansion slot (8).

9. The multi-stage fine filtration equipment for preparing sterile fructose disodium phosphate powder according to claim 2, characterized in that: A partition plate (30) is provided in the cylinder body (1), the upper area of ​​the partition plate (30) is a closed cavity (31), the rotating cylinder (16) is placed in the closed cavity (31), the lower area of ​​the partition plate (30) is a sterile fine filtration area (32), the liquid outlet pipe (4) is placed at the top of the sterile fine filtration area (32), and the liquid inlet pipe (3) is placed at the bottom of the sterile fine filtration area (32).

10. The multi-stage fine filtration equipment for preparing sterile fructose disodium phosphate powder according to claim 1, characterized in that: A protective cover (33) is detachably mounted on the end cover (2), and a leaking portion of the lifting shaft (9) on the end cover (2) is placed in the protective cover (33).

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