Medical composite magnetic stirrer

Abstract

The utility model belongs to the field of traditional Chinese medicine production, and provides a medical composite magnetic stirrer which comprises a tank body and a stirring device, the stirring device is arranged at the bottom of the tank body, the stirring device comprises a magnetic cylinder with a central shaft groove formed in the bottom and an isolation hood arranged outside the magnetic cylinder, and an impeller is arranged in a gap outside the isolation hood. A radial outer magnetic ring is arranged at the top of the impeller, an axial outer magnetic ring is arranged on the inner wall of the impeller, a radial inner magnetic ring is arranged at the top in the magnetic cylinder, an axial inner magnetic ring is arranged on the inner wall of the magnetic cylinder, a driving device is arranged at the bottom of the magnetic cylinder, and the driving device is connected with a central shaft groove in the bottom of the magnetic cylinder in a matched mode and drives the stirring device to rotate and stir. According to the invention, higher torque can be transmitted through composite magnetic force, controllable transmission torque and rotating speed in a larger range can be obtained, more stable speed regulation performance is obtained, non-contact regulation of torque and power is realized, the practicability is higher, and the operation efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the field of traditional Chinese medicine production, and particularly relates to a medical composite magnetic stirrer. Background Art

[0002] Agitator is a machine that has a shaft with blades rotating in a cylinder or a groove, and mixes and compounds a variety of raw materials to make them into a composite or suitable consistency. By stirring, the reactants are fully compounded and heated evenly, the reaction time is shortened, and the reaction efficiency is improved. The application of mixers is relatively wide, for example, in the fields of pharmaceutical processing, food processing, and chemical raw material production and processing, mixers are used. This application is mainly for medical pharmaceutical mixers, which are extremely important composite equipment in the pharmaceutical industry. In the pharmaceutical industry, the mixing of liquid medicines is an indispensable part of the pharmaceutical process. It involves key factors such as the uniformity, stability and effect of the drug. Traditional manual mixing can no longer meet the requirements of modern drug production for efficiency and quality. Therefore, medicinal mixers are widely used as an efficient and accurate solution. In order to meet the GMP (Good Manufacturing Practice) of drug production in the production process, it is necessary to ensure that no pollution is introduced during the compounding process, the compounding is uniform and easy to clean and disinfect. For this reason, the design usually needs to be made of stainless steel with high surface finish, good sealing, and corrosion and wear resistance. In addition to the basic stirring function, it has also developed a variety of functions such as heating, cooling, vacuum stirring, vacuum degassing, high shear dispersion, etc. to meet the preparation needs of different pharmaceutical preparations (such as solid preparations, liquid preparations, semi-solid preparations, etc.).

[0003] Although most pharmaceutical blenders have good compounding capabilities, it may be difficult to ensure absolute uniformity of compounding when dealing with certain complex formulas or materials with large differences in particle size, especially when dealing with high-viscosity or non-Newtonian fluids. In addition, ordinary pharmaceutical blenders may not be able to flexibly adapt to the production processes of various types of products. For example, the same blender may require different mixing methods and speeds when dealing with solid and liquid preparations, and general-purpose blenders may have limitations in this regard. Modern pharmaceutical blenders are designed with cleaning and disinfection needs in mind, but the complex structure may lead to dead corners that are difficult to clean thoroughly, especially in equipment with internal pipes, valves, or nested components, which may breed microorganisms and are not conducive to maintaining a sterile production environment. Utility Model Content

[0004] In view of the above problems, the utility model proposes a medical composite magnetic stirrer, comprising a tank body and a stirring device, wherein the stirring device is arranged at the bottom of the tank body, the stirring device comprises a magnetic cylinder with a central axis groove arranged at the bottom and an isolation cover arranged outside the magnetic cylinder, an impeller is arranged in the gap outside the isolation cover, a radial outer magnetic ring is arranged at the top of the impeller, an axial outer magnetic ring is arranged on the inner wall of the impeller, a radial inner magnetic ring is arranged at the top of the magnetic cylinder, an axial inner magnetic ring is arranged on the inner wall of the magnetic cylinder, a driving device is arranged at the bottom of the magnetic cylinder, the driving device is cooperatively connected with the central axis groove at the bottom of the magnetic cylinder, and drives the stirring device to rotate and stir.

[0005] Furthermore, the impeller includes a main wheel and a secondary wheel, the secondary wheel is arranged at the top of the main wheel, an annular groove is arranged at the top of the secondary wheel, the radial outer magnetic ring is arranged in the annular groove of the secondary wheel, an axial annular groove is arranged on the inner wall of the main wheel, and the axial outer magnetic ring is arranged in the axial annular groove of the main wheel.

[0006] Furthermore, a radial annular groove is arranged at the top of the magnetic cylinder, an axial annular groove is arranged in the magnetic cylinder, the radial inner magnetic ring is arranged in the radial annular groove of the magnetic cylinder, and the axial inner magnetic ring is arranged in the axial annular groove of the magnetic cylinder.

[0007] Furthermore, the radially outer magnetic ring and the radially inner magnetic ring both adopt a Halbach annular array structure.

[0008] Furthermore, the axial outer magnetic ring and the axial inner magnetic ring both adopt a Halbach linear array structure.

[0009] Furthermore, the driving device includes a driving shaft and a driving motor, one end of the driving shaft is inserted into the central axis groove at the bottom of the magnetic cylinder for connection, and the other end is rotationally connected to the driving motor.

[0010] Furthermore, a keyway is arranged on the inner wall of the central axis groove of the magnetic cylinder, a flat key is arranged on the driving shaft, and the magnetic cylinder and the driving shaft are connected by the flat key being inserted into the keyway.

[0011] Furthermore, the secondary wheel is provided with a plurality of threaded holes extending therethrough, the top of the main wheel is provided with a plurality of threaded holes corresponding to the secondary wheel, and the secondary wheel is connected to the main wheel by screws.

[0012] Furthermore, the main wheel includes a plurality of stirring impeller wings.

[0013] Furthermore, the bottom of the tank body is connected to the bottom of the isolation cover of the stirring device, and a static sealing gasket is arranged between the tank body and the isolation cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present application utilizes the advantages of permanent magnet transmission technology by adopting a composite magnetic agitator including a radial outer magnetic ring, a radial inner magnetic ring, an axial outer magnetic ring, and an axial inner magnetic ring, applies permanent magnet flexible transmission to the field of medical stirring, and mixes the axial magnetic field with the radial magnetic field. The composite magnetic force can transmit higher torque. Considering that different stirring methods and speeds may be required when processing solid preparations and liquid preparations, in order to optimize the magnetic structure and enable the impeller to obtain a higher speed, the magnetic rings all adopt the magnet structure of the Halbach array, the radial magnetic ring adopts a linear array, and the axial magnetic ring adopts a circular array. The radial and axial magnetic rings are compounded together and work synchronously. By axially moving the magnetic cylinder and controlling the air gap and meshing area between the inner and outer magnetic rings, a wider range of controllable transmission torque and speed can be obtained, a more stable speed regulation performance can be obtained, and non-contact adjustment of torque and power can be achieved. It is more practical and has higher operating efficiency.

[0016] 2. The design of this application takes into account the needs of cleaning and disinfection, minimizes complex structures, makes the tank body smooth and easy to clean, and the simple connection between the isolation cover and the tank body, while considering the sealing, can avoid the breeding of microorganisms and is conducive to the maintenance of a sterile production environment in the tank body.

[0017] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in 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 described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The structure diagram of the magnetic stirrer in the embodiment of the utility model is shown;

[0020] Figure 2 A schematic diagram of a stirring device in an embodiment of the utility model is shown;

[0021] Figure 3 A schematic diagram of a Halbach annular array of axial magnetic rings of a magnetic stirrer in an embodiment of the utility model is shown;

[0022] Figure 4 A schematic diagram showing the circumferential development of the Halbach linear array of radial magnetic rings of the magnetic stirrer in the embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the main wheel structure of the magnetic agitator impeller in an embodiment of the utility model is shown;

[0024] Figure 6 The schematic diagram of the auxiliary wheel structure of the magnetic stirrer impeller in the embodiment of the utility model is shown;

[0025] Figure 7 A schematic diagram showing the structure of a magnetic cylinder of a magnetic stirrer in an embodiment of the utility model is shown;

[0026] Figure 8 An enlarged view of the structure of the connection between the magnetic stirrer tank and the isolation cover in the embodiment of the utility model is shown.

[0027] In the figure, 1, tank body; 2, stirring device; 21, magnetic cylinder; 22, isolation cover; 23, impeller; 231, main wheel; 232, secondary wheel; 24, radial outer magnetic ring; 25, axial outer magnetic ring; 26, radial inner magnetic ring; 27, axial inner magnetic ring; 3, driving device; 31, driving shaft; 32, driving motor. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 As shown, a medical composite magnetic stirrer comprises a tank body 1 and a stirring device 2 , wherein the stirring device 2 is arranged at the bottom of the tank body 1 .

[0030] like Figure 2 As shown, the stirring device 2 includes a magnetic cylinder 21 with a central axis groove at the bottom and an isolation cover 22 arranged outside the magnetic cylinder 21, an impeller 23 is arranged in the outer gap of the isolation cover 22, a radial outer magnetic ring 24 is arranged at the top of the impeller 23, an axial outer magnetic ring 25 is arranged on the inner wall of the impeller 23, a radial inner magnetic ring 26 is arranged at the top of the magnetic cylinder 21, an axial inner magnetic ring 27 is arranged on the inner wall of the magnetic cylinder 21, and a driving device 3 is arranged at the bottom of the magnetic cylinder 21, and the driving device 3 is connected with the central axis groove at the bottom of the magnetic cylinder 21 to drive the stirring device 2 to rotate and stir.

[0031] The driving device 3 includes a driving shaft 31 and a driving motor 32 . One end of the driving shaft 31 is inserted into the central axis groove at the bottom of the magnetic cylinder 21 and connected thereto, and the other end is rotatably connected to the driving motor 32 .

[0032] The central axes of the magnetic cylinder 21 , the isolation cover 22 and the impeller 23 coincide with each other. The impeller 23 disposed outside the isolation cover 22 maintains a certain gap with the isolation cover 22 in order to reduce the friction force when the impeller 23 rotates.

[0033] A composite magnetic stirrer is formed by setting a radial outer magnetic ring 24, a radial inner magnetic ring 26, an axial outer magnetic ring 25, and an axial inner magnetic ring 27. The advantages of permanent magnetic transmission technology are utilized, and permanent magnetic flexible transmission is applied to the field of medical stirring. The axial magnetic field and the radial magnetic field are mixed, and the composite magnetic force can transmit a higher torque. Considering that different stirring methods and speeds may be required when processing solid preparations and liquid preparations, in order to optimize the magnetic structure, the impeller 23 can obtain a higher rotation speed.

[0034] like Figure 3 As shown, the radially outer magnetic ring 24 and the radially inner magnetic ring 26 both adopt a Halbach annular array structure.

[0035] like Figure 4 As shown, the axial outer magnetic ring 25 and the axial inner magnetic ring 27 both adopt a Halbach linear array structure.

[0036] The radial magnetic rings adopt a linear array, and the axial magnetic rings adopt a circular array. The radial and axial magnetic rings are compounded together and work synchronously. By axially moving the magnetic cylinder 21, the air gap and the meshing area between the inner and outer magnetic rings are controlled, so that a wider range of controllable transmission torque and speed can be obtained, a more stable speed regulation performance can be obtained, and non-contact adjustment of torque and power can be achieved. It is more practical and has higher operating efficiency.

[0037] By arranging permanent magnets with different magnetizing directions according to a certain pattern, the magnetic lines of force can be gathered on one side of the magnet and weakened on the other side, thereby obtaining a relatively ideal unilateral magnetic field. The radial magnetic rings adopt a linear array, and the axial magnetic rings adopt a circular array. The radial and axial magnetic rings are compounded together and work synchronously. By axially moving the magnetic cylinder 21 and controlling the air gap and meshing area between the inner and outer magnetic rings, a wider range of controllable transmission torque and speed can be obtained, a more stable speed regulation performance can be obtained, and non-contact transmission of energy inside and outside the tank body 1 can be realized.

[0038] The impeller 23 includes a main wheel 231 (such as Figure 5 As shown) and secondary wheel 232 (as shown Figure 6As shown in the figure, the secondary wheel 232 is arranged on the top of the main wheel 231, an annular groove is arranged on the top of the secondary wheel 232, the radial outer magnetic ring 24 is arranged in the annular groove of the secondary wheel, an axial annular groove is arranged on the inner wall of the main wheel 231, and the axial outer magnetic ring 25 is arranged in the axial annular groove of the main wheel 231.

[0039] The secondary wheel 232 is provided with a plurality of threaded holes passing therethrough, and the top of the main wheel 231 is provided with a plurality of threaded holes corresponding thereto, and the secondary wheel 232 is connected to the main wheel 231 by screws.

[0040] The axial outer magnetic ring 25 is installed on the main wheel 231, and the radial outer magnetic ring 24 is installed on the secondary wheel 232, so as to expand the utilization rate of the magnetic field and obtain a larger torque.

[0041] The main wheel 231 includes a plurality of stirring impeller wings.

[0042] In some embodiments, six stirring impeller wings are evenly distributed on the main wheel 231, which can stir and compound a variety of raw materials. A mounting groove for the axial outer magnetic ring 25 is provided in the wall of the main wheel 231, and a through hole is opened in the middle.

[0043] An axial hole is opened in the middle of the secondary wheel 232, a mounting groove for the radial outer magnetic ring 24 is arranged on the top of the secondary wheel 232, and a secondary wheel wing is arranged on the top surface of the secondary wheel 232 to assist the wheel wing of the main wheel 231 in stirring.

[0044] In some embodiments, the main wheel 231 and the secondary wheel 232 are each provided with four pairs of threaded holes corresponding to each other, and are connected and fixed by screws.

[0045] like Figure 7 As shown, a radial annular groove is arranged at the top of the magnetic cylinder 21 , an axial annular groove is arranged in the magnetic cylinder 21 , the radial inner magnetic ring 26 is arranged in the radial annular groove of the magnetic cylinder 21 , and the axial inner magnetic ring 27 is arranged in the axial annular groove of the magnetic cylinder 21 .

[0046] The magnetic cylinder 21 is cylindrical in shape, and has mounting grooves for mounting radial inner magnetic ring 26 and axial inner magnetic ring 27, which play a fixing role. The center of the magnetic cylinder 21 has an axial hole and a keyway, which can be connected to the drive shaft 31 by a flat key. The drive motor 32 provides power to drive the drive shaft 31 to drive the magnetic cylinder 21 to rotate. In order to facilitate the connection and reduce the gap between the magnetic cylinder 21 and the isolation cover 22, a countersunk threaded hole is provided on the top.

[0047] like Figure 8 As shown, the bottom of the tank body 1 is connected to the bottom of the isolation cover 22 of the stirring device 2, and a static sealing gasket is arranged between the tank body 1 and the isolation cover 22. The static sealing gasket has a good sealing effect, so that the stirrer has good sealing performance.

[0048] The driving motor 32 drives the driving shaft 31 to rotate, and the driving shaft 31 drives the magnetic cylinder 21 connected thereto to rotate. The radial inner magnetic ring 26 and the axial inner magnetic ring 27 arranged in the magnetic cylinder 21 and the radial outer magnetic ring 24 and the axial outer magnetic ring 25 arranged on the impeller 23 rotate using a conforming magnetic field. When different drugs are needed, the required rotation speed is different. Therefore, the magnetic cylinder 21 can be moved axially to control the air gap and meshing area between the inner and outer magnetic rings, so as to obtain a wider range of controllable transmission torque and rotation speed, obtain more stable speed regulation performance, and realize non-contact adjustment of torque and power. It is more practical and has higher operating efficiency.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A medical composite magnetic stirrer, comprising a tank body (1), characterized in that: The invention also comprises a stirring device (2), wherein the stirring device (2) is arranged at the bottom of the tank body (1), the stirring device (2) comprises a magnetic cylinder (21) with a central axis groove at the bottom and an isolation cover (22) arranged outside the magnetic cylinder (21), an impeller (23) is arranged in the gap outside the isolation cover (22), a radial outer magnetic ring (24) is arranged at the top of the impeller (23), an axial outer magnetic ring (25) is arranged on the inner wall of the impeller (23), a radial inner magnetic ring (26) is arranged at the top of the magnetic cylinder (21), an axial inner magnetic ring (27) is arranged on the inner wall of the magnetic cylinder (21), and a driving device (3) is arranged at the bottom of the magnetic cylinder (21), the driving device (3) is connected with the central axis groove at the bottom of the magnetic cylinder (21), and drives the stirring device (2) to rotate and stir.

2. The medical composite magnetic stirrer according to claim 1, characterized in that: The impeller (23) comprises a main wheel (231) and a secondary wheel (232), wherein the secondary wheel (232) is arranged at the top of the main wheel (231), an annular groove is arranged at the top of the secondary wheel (232), the radial outer magnetic ring (24) is arranged in the annular groove of the secondary wheel, an axial annular groove is arranged on the inner wall of the main wheel (231), and the axial outer magnetic ring (25) is arranged in the axial annular groove of the main wheel (231).

3. The medical composite magnetic stirrer according to claim 1, characterized in that: A radial annular groove is arranged at the top of the magnetic cylinder (21), an axial annular groove is arranged in the magnetic cylinder (21), the radial inner magnetic ring (26) is arranged in the radial annular groove of the magnetic cylinder (21), and the axial inner magnetic ring (27) is arranged in the axial annular groove of the magnetic cylinder (21).

4. The medical composite magnetic stirrer according to claim 1, characterized in that: The radially outer magnetic ring (24) and the radially inner magnetic ring (26) both adopt a Halbach annular array structure.

5. The medical composite magnetic stirrer according to claim 1, characterized in that: The axial outer magnetic ring (25) and the axial inner magnetic ring (27) both adopt a Halbach linear array structure.

6. The medical composite magnetic stirrer according to claim 1, characterized in that: The driving device (3) comprises a driving shaft (31) and a driving motor (32); one end of the driving shaft (31) is inserted into a central shaft groove at the bottom of the magnetic cylinder (21) for connection, and the other end is rotationally connected to the driving motor (32).

7. The medical composite magnetic stirrer according to claim 6, characterized in that: A keyway is arranged on the inner wall of the central shaft groove of the magnetic cylinder (21), a flat key is arranged on the driving shaft (31), and the magnetic cylinder (21) and the driving shaft (31) are connected by the flat key being inserted into the keyway.

8. The medical composite magnetic stirrer according to claim 2, characterized in that: The secondary wheel (232) is provided with a plurality of threaded holes extending therethrough, and the top of the main wheel (231) is provided with a plurality of threaded holes corresponding to the secondary wheel (232), and the secondary wheel (232) is connected to the main wheel (231) by means of screws.

9. The medical composite magnetic stirrer according to claim 8, characterized in that: The main wheel (231) includes a plurality of stirring impeller wings.

10. The medical composite magnetic stirrer according to claim 1, characterized in that: The bottom of the tank body (1) is connected to the bottom of the isolation cover (22) of the stirring device (2), and a static sealing gasket is arranged between the tank body (1) and the isolation cover (22).

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