Preparation equipment of stem cell-loaded injectable hydrogel for tissue repair

Abstract

The invention relates to the technical field of hydrogel preparation, and particularly discloses stem cell-loaded injectable hydrogel preparation equipment for tissue repair, the stem cell-loaded injectable hydrogel preparation equipment comprises a mixing barrel, a sealing cover is fixedly mounted on the upper end surface of the mixing barrel, and a stirring and extruding assembly is arranged in the mixing barrel and at the upper end of the sealing cover; the stirring and extruding assembly comprises a rectangular rod fixedly mounted on the upper end face of the sealing cover, and mounting grooves are formed in the lower end of the rectangular rod and the upper end of the sealing cover; a threaded ring is rotationally mounted between the two mounting grooves; threads are formed in the inner circumferential surface of the threaded ring; under the cooperation of a plurality of structures such as an external threaded rod, an extrusion disc and a threaded ring, the extrusion disc can slide up and down in the mixing barrel, so that colloidal hydrogel in the mixing barrel can be extruded out of the mixing barrel, and the time is saved.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogel preparation, and in particular to a preparation device for injectable hydrogel loaded with stem cells for tissue repair. Background Art

[0002] As a high-water-content polymer network material, hydrogel is widely used in various tissue repairs, such as wound dressings, cartilage repair, bone defect filling materials, etc. Among them, hydrogels made of natural polymer materials (such as gelatin, chitosan, hyaluronic acid and sodium alginate) have more outstanding biocompatibility. In the production process, it is necessary to mix a variety of raw materials together, and then use a stirring device to stir and mix the raw materials to produce usable hydrogels. There are many stirring and mixing equipment for stirring hydrogel matrix in China, including horizontal, vertical, and reactor.

[0003] However, in the production process, the raw materials of the hydrogel are liquid colloidal materials after mixing. Therefore, when the mixed raw materials are discharged from the preparation device, the automatic discharge speed is slow due to the physical properties. If the time is too long, it will affect the subsequent processing steps, resulting in low work efficiency and affecting the processing effect.

[0004] Therefore, we specifically propose a stem cell-loaded injectable hydrogel preparation device for tissue repair. Summary of the invention

[0005] The purpose of the present invention is to provide a device for preparing an injectable hydrogel loaded with stem cells for tissue repair, which can allow the extrusion disk to slide up and down inside the mixing barrel with the cooperation of multiple structures such as an external threaded rod, an extrusion disk, and a threaded ring, so that the colloidal hydrogel inside the mixing barrel can be squeezed out of the mixing barrel, thereby saving time and solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a preparation device for injectable hydrogel loaded with stem cells for tissue repair, comprising a mixing barrel, a sealing cover is fixedly installed on the upper end surface of the mixing barrel, and a stirring and extruding component is provided inside the mixing barrel and on the upper end of the sealing cover;

[0007] The stirring and extruding assembly comprises a rectangular rod fixedly mounted on the upper end surface of the sealing cover, and the lower end of the rectangular rod and the upper end of the sealing cover are both provided with mounting grooves;

[0008] A threaded ring is installed between the two installation grooves for common rotation; a thread is provided on the inner circumferential surface of the threaded ring;

[0009] An external threaded rod is slidably mounted inside the rectangular rod, and the external threaded rod is rotatably combined with the threaded ring;

[0010] The lower end of the external threaded rod passes through the sealing cover and is located inside the mixing barrel. The lower end of the external threaded rod is located on the inner circumference of the mixing barrel and a squeezing disk is fixedly installed thereon.

[0011] Preferably, a fixing frame is fixedly mounted on the upper end surface of the sealing cover, and the inner upper end of the fixing frame is fixedly connected to the outer side of the lower end of the rectangular rod.

[0012] Preferably, a mounting plate is fixedly mounted on the outer side of the upper end of the rectangular rod, and a mounting plate is evenly fixedly mounted on the upper end surface of the mounting plate. The mounting plates are grouped in pairs, and a second motor is fixedly mounted on the outer side of one of the mounting plates in the group of two, and the output rotation of the second motor is installed on the inner side of another mounting plate in the group of two.

[0013] Preferably, a first adjustment plate is fixedly mounted on the output shaft of the second motor, a second adjustment plate is rotatably mounted on the upper end of the first adjustment plate, and a positioning connector is commonly fixedly mounted inside the upper ends of a plurality of the second adjustment plates.

[0014] Preferably, a rotating shaft rod is fixedly mounted on the output shaft of the positioning connector, a secondary rod is arranged on the outer side of the rotating shaft rod, and both the rotating shaft rod and the secondary rod are slidably mounted inside the external threaded rod.

[0015] Preferably, a through hole is opened on the circumferential surface of the lower end of the secondary rod, a first stirring rod is rotatably mounted on the circumferential surface of the rotating shaft rod, a second stirring rod is rotatably mounted on the lower end of the first stirring rod, the lower end of the second stirring rod is rotatably mounted on the inner lower part of the through hole, and a copper rotor is fixedly mounted on the lower end of the secondary rod.

[0016] Preferably, a fourth motor is fixedly installed inside the extrusion disk, a first gear is fixedly installed on the output shaft of the fourth motor, a mounting shell is fixedly installed at the lower end of the extrusion disk, and a sliding groove is provided from the inner bottom surface to the outer bottom surface of the mounting shell.

[0017] Preferably, a gear ring is rotatably installed inside the mounting shell, an outer circumferential surface of the gear ring is provided with an external tooth groove, the first gear passes through the mounting shell and meshes with the gear ring, a second gear is rotatably installed inside the mounting shell and located inside the gear ring, a sealing plate is slidably installed inside the mounting shell, a cylinder is provided on the lower end surface of the sealing plate, and the cylinder is slidably installed inside the slide groove, and the tooth groove of the straight edge of the sealing plate meshes with the adjacent second gear.

[0018] Preferably, a feeding port is provided on the circumferential surface of the mixing barrel, a discharge pipe is fixedly installed on the bottom surface of the mixing barrel, an annular groove is provided on the inner bottom surface of the mixing barrel, the copper rotor is slidably installed inside the annular groove, and a sealing shell is fixedly installed on the inner bottom surface of the mixing barrel.

[0019] Preferably, a first motor is fixedly mounted on the lower end surface of the mixing barrel, a magnetic rotor is fixedly mounted on the output shaft of the first motor, the magnetic rotor is located inside the sealing shell, and support legs are fixedly mounted on the outer circumferential surface of the mixing barrel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention enables the extrusion disk to slide up and down inside the mixing barrel with the cooperation of multiple structures such as the external threaded rod, the extrusion disk, and the threaded ring, so that the colloidal hydrogel inside the mixing barrel can be squeezed out of the mixing barrel, thereby saving time.

[0022] 2. In the process of extrusion, the extrusion plate of the present invention can clean the inner wall of the mixing barrel, thereby saving the time of operators for cleaning and avoiding waste of materials.

[0023] 3. The present invention can adjust the first stirring rod and the second stirring rod under the action of multiple structures such as the rotating shaft rod, the secondary rod, the first adjustment plate, and the second adjustment plate, thereby avoiding the first stirring rod and the second stirring rod from being affected by the extrusion disk during operation.

[0024] 4. Under the action of the magnetic rotor and the copper rotor, the present invention can avoid the situation where the stirring rod of the motor cannot rotate due to the viscosity of the colloid during the stirring process, thereby avoiding overload inside the motor and ensuring the safety of the first motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the external structure of the main body of the present invention;

[0027] Figure 2 It is a cross-sectional view of a mixing barrel of the present invention;

[0028] Figure 3 It is a schematic diagram of a rectangular rod of the present invention;

[0029] Figure 4 It is a schematic diagram of the first adjustment plate and the second adjustment plate of the present invention;

[0030] Figure 5It is a schematic diagram of the rectangular rod, the rotating shaft rod and the secondary rod of the present invention;

[0031] Figure 6 It is a schematic diagram of the first stirring rod and the second stirring rod of the present invention;

[0032] Figure 7 It is a partial structural schematic diagram of the stirring and extruding assembly of the present invention;

[0033] Figure 8 It is a schematic diagram of the threaded ring of the present invention;

[0034] Fig. 9 For the present invention Figure 8 Enlarged view of point A in the middle;

[0035] Fig.10 It is a schematic diagram of the external threaded rod and the extruded plate of the present invention;

[0036] Fig.11 It is a schematic diagram of the gear ring and the sealing plate of the present invention.

[0037] Description of reference numerals:

[0038] 1. Mixing barrel; 2. Feeding port; 3. Discharging pipe; 4. Ring groove; 5. Sealing shell; 6. First motor; 7. Magnetic rotor; 8. Support legs; 9. Sealing cover; 10. Fixed frame;

[0039] 40. stirring and extruding assembly; 11. rectangular rod; 12. mounting plate; 13. mounting plate; 14. second motor; 15. first adjusting plate; 16. second adjusting plate; 17. positioning connector; 18. rotating shaft rod; 19. first stirring rod; 20. second stirring rod; 21. secondary rod; 211. copper rotor; 22. through-hole; 23. mounting groove; 24. threaded ring; 25. external threaded rod; 26. extruding plate;

[0040] 27. Fourth motor; 28. First gear; 29. ​​Mounting shell; 30. Slide groove; 31. Gear ring; 32. External tooth groove; 33. Second gear; 34. Sealing plate. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figures 1 to 10 , the present invention provides a technical solution:

[0043] A preparation device for injectable hydrogel loaded with stem cells for tissue repair, comprising a mixing barrel 1, a sealing cover 9 is fixedly installed on the upper end surface of the mixing barrel 1, and a stirring and extruding component 40 is commonly provided inside the mixing barrel 1 and the upper end of the sealing cover 9; the stirring and extruding component 40 comprises a rectangular rod 11 fixedly installed on the upper end surface of the sealing cover 9, and a mounting groove 23 is provided at the lower end of the rectangular rod 11 and the upper end of the sealing cover 9; a threaded ring 24 is rotatably installed between the two mounting grooves 23; a thread is provided on the inner circumferential surface of the threaded ring 24; an externally threaded rod 25 is slidably installed inside the rectangular rod 11, and the externally threaded rod 25 is rotatably combined with the threaded ring 24; the lower end of the externally threaded rod 25 passes through the sealing cover 9 and is located inside the mixing barrel 1, and the lower end of the externally threaded rod 25 is located on the inner circumference of the mixing barrel 1 and an extrusion disk 26 is fixedly installed.

[0044] A fixing frame 10 is fixedly mounted on the upper end surface of the sealing cover 9 , and the inner upper end of the fixing frame 10 is fixedly connected to the outer side of the lower end of the rectangular rod 11 .

[0045] A mounting plate 12 is fixedly mounted on the outer side of the upper end of the rectangular rod 11, and a mounting plate 13 is evenly fixedly mounted on the upper end surface of the mounting plate 12. The mounting plates 13 are grouped in pairs, and a second motor 14 is fixedly mounted on the outer side of one of the mounting plates 13 in the group of two. The output of the second motor 14 is rotatably mounted on the inner side of another mounting plate 13 in the group of two; a first adjusting plate 15 is fixedly mounted on the output shaft of the second motor 14, and a second adjusting plate 16 is rotatably mounted on the upper end of the first adjusting plate 15. A positioning connector 17 is commonly fixedly mounted on the upper ends of multiple second adjusting plates 16. A rotating shaft rod 18 is fixedly mounted on the output shaft of the positioning connector 17, and a secondary rod 21 is arranged on the outer side of the rotating shaft rod 18. The rotating shaft rod 18 and the secondary rod 21 are both slidably mounted inside the externally threaded rod 25.

[0046] By adopting the above technical solution, when in use, the mixing barrel 1 is kept away from the ground under the action of the supporting legs 8, the raw materials are added into the mixing barrel 1 through the feeding port 2, and then the multiple second motors 14 on the upper end surface of the mounting plate 12 in the stirring and extruding assembly 40 are started, and the output of the second motor 14 drives the first adjustment plate 15 to rotate, and the first adjustment plate 15 drives the second adjustment plate 16 to rotate synchronously, and the multiple second adjustment plates 16 will pull the positioning connector 17 to slide downward.

[0047] As the positioning connector 17 slides downward, it will also slide the shaft rod 18 downward synchronously. As the shaft rod 18 slides downward, due to the limitation of the secondary rod 21, the shaft rod 18 can move downward synchronously with the first stirring rod 19. When the through hole 22 at the lower end of the secondary rod 21 slides out of the interior of the external threaded rod 25, the first stirring rod 19 will rotate with the second stirring rod 20.

[0048] At this time, the shaft rod 18 continues to move downward, so that the copper rotor 211 at the lower end of the secondary rod 21 can slide into the inside of the annular groove 4; the first motor 6 is started, and the output shaft of the first motor 6 will rotate synchronously with the magnetic rotor 7, and the magnetic field formed between the magnetic rotor 7 and the copper rotor 211 will pass through the sealing shell 5, so that the copper rotor 211 can rotate, and then the copper rotor 211 can rotate synchronously with the secondary rod 21, and the secondary rod 21 can rotate synchronously with the shaft rod 18, so that the first stirring rod 19 and the second stirring rod 20 can rotate synchronously, so as to mix and stir the raw materials inside the mixing barrel 1.

[0049] Then, after the mixing operation is completed, the interface needs to be operated in reverse according to the above steps to allow the rotating shaft rod 18 to slide into the interior of the external threaded rod 25 with the secondary rod 21 and other structures.

[0050] At this time, the operator rotates the threaded ring 24, wherein the threaded ring 24 can rotate forward and reverse under the action of the mounting groove 23, so that the external threaded rod 25 used later can move up and down, and the threaded ring 24 can make the external threaded rod 25 rotate inside the rectangular rod 11 when rotating. It should be noted that the upper end surface of the mixing barrel 1 is fixedly installed with a sealing cover 9, and the upper end surface of the sealing cover 9 is fixedly installed with a fixing frame 10, and the rectangular rod 11 is fixedly connected to the fixing frame 10, so the rectangular rod 11 can be in a fixed state, and the second motor 14 used above is fixed. It is fixedly installed on the upper end surface of the mounting plate 12, and the second motor 14 is fixedly installed on the mounting plate 13; and during the rotation process, the external threaded rod 25 can slide downward with the extrusion plate 26 inside the mixing barrel 1, and then the colloid inside the mixing barrel 1 can be squeezed out of the mixing barrel 1 and flow out from the discharge pipe 3, thereby saving the time for the colloid to flow on its own. Therefore, the stirred material is in a colloid state with poor fluidity, thereby saving the collection time, and the inner wall of the mixing barrel 1 can be initially cleaned under the action of the extrusion plate 26, saving the tedious subsequent cleaning.

[0051] Specifically, Figures 1 to 11 As shown, a through hole 22 is opened on the circumferential surface of the lower end of the secondary rod 21, and a first stirring rod 19 is rotatably installed on the circumferential surface of the rotating shaft rod 18. A second stirring rod 20 is rotatably installed on the lower end of the first stirring rod 19, and the lower end of the second stirring rod 20 is rotatably installed on the inner lower part of the through hole 22. A copper rotor 211 is fixedly installed on the lower end of the secondary rod 21.

[0052] A fourth motor 27 is fixedly installed inside the extrusion plate 26, and a first gear 28 is fixedly installed on the output shaft of the fourth motor 27. A mounting shell 29 is fixedly installed at the lower end of the extrusion plate 26, and a slide groove 30 is provided from the inner bottom surface to the outer bottom surface of the mounting shell 29; a gear ring 31 is rotatably installed inside the mounting shell 29, and an outer circumferential surface of the gear ring 31 is provided with an external tooth groove 32, the first gear 28 passes through the mounting shell 29 and meshes with the gear ring 31, and a second gear 33 is rotatably installed inside the mounting shell 29 and located inside the gear ring 31, and a sealing plate 34 is slidably installed inside the mounting shell 29, and a cylinder is provided on the lower end surface of the sealing plate 34, and the cylinder is slidably installed inside the slide groove 30, and the tooth groove of the straight edge of the sealing plate 34 meshes with the adjacent second gear 33.

[0053] A feeding port 2 is provided on the circumferential surface of the mixing barrel 1, a discharge pipe 3 is fixedly installed on the bottom surface of the mixing barrel 1, an annular groove 4 is provided on the inner bottom surface of the mixing barrel 1, the copper rotor 211 is slidably installed inside the annular groove 4, a sealing shell 5 is fixedly installed on the inner bottom surface of the mixing barrel 1; a first motor 6 is fixedly installed on the lower end surface of the mixing barrel 1, a magnetic rotor 7 is fixedly installed on the output shaft of the first motor 6, and the magnetic rotor 7 is located inside the sealing shell 5; a supporting leg 8 is fixedly installed on the outer circumferential surface of the mixing barrel 1.

[0054] By adopting the above technical solution, when in use, since it is necessary to let the rotating shaft rod 18 slide the secondary rod 21 downward, the fourth motor 27 needs to be started during use, and the output shaft of the fourth motor 27 rotates with the first gear 28. The first gear 28 can drive the gear ring 31 inside the mounting shell 29 to rotate synchronously under the action of the external tooth groove 32, and the gear ring 31 can make the gear ring 31 rotate internally and multiple second gears 33 installed on the bottom surface of the mounting shell 29 rotate synchronously during the rotation process, so that the second gear 33 can drive the sealing plate 34 to rotate, and the sealing plate 34 can slide linearly under the action of the lower end surface cylinder and the slide groove 30, and then the central closed position can be opened, so that the secondary rod 21 can pass through the mounting shell 29 and enter the interior of the mixing barrel 1.

[0055] Working principle: First, raw materials are added to the mixing barrel 1 under the action of the feeding port 2, and the fourth motor 27 is started, and the first gear 28 drives the gear ring 31 to rotate, and then the gear ring 31 drives the second gear 33 to rotate, so that the closed position of the sealing plate 34 can be in an open state.

[0056] Then start the second motor 14, so that the first adjustment plate 15 rotates with the second adjustment plate 16, so that the positioning connector 17 can move downward with the rotating shaft rod 18, so that the first stirring rod 19 and the second stirring rod 20 can be changed from a vertical state to a horizontal state, and then rotate under the action of the first motor 6.

[0057] Finally, under the action of the threaded ring 24, the external threaded rod 25 carries the extrusion disk 26 to perform the extrusion operation.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for preparing an injectable hydrogel loaded with stem cells for tissue repair, comprising a mixing barrel (1), a sealing cover (9) being fixedly mounted on the upper end surface of the mixing barrel (1), characterized in that: The interior of the mixing barrel (1) and the upper end of the sealing cover (9) are provided with a stirring and extruding assembly (40); The stirring and extruding assembly (40) comprises a rectangular rod (11) fixedly mounted on the upper end surface of the sealing cover (9), and a mounting groove (23) is provided at the lower end of the rectangular rod (11) and the upper end of the sealing cover (9); A threaded ring (24) is mounted between the two mounting grooves (23) for co-rotation; threads are provided on the inner circumferential surface of the threaded ring (24); An external threaded rod (25) is slidably mounted inside the rectangular rod (11), and the external threaded rod (25) is rotatably combined with the threaded ring (24); The lower end of the externally threaded rod (25) passes through the sealing cover (9) and is located inside the mixing barrel (1). The lower end of the externally threaded rod (25) is located on the inner circumference of the mixing barrel (1) and a squeezing disc (26) is fixedly installed.

2. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 1, characterized in that: A fixing frame (10) is fixedly mounted on the upper end surface of the sealing cover (9), and the inner upper end of the fixing frame (10) is fixedly connected to the outer side of the lower end of the rectangular rod (11).

3. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 1, characterized in that: A mounting plate (12) is fixedly mounted on the outer side of the upper end of the rectangular rod (11), and mounting plates (13) are evenly fixedly mounted on the upper end surface of the mounting plate (12). The mounting plates (13) are arranged in groups of two, and a second motor (14) is fixedly mounted on the outer side of one of the mounting plates (13) in the group of two, and the output of the second motor (14) is rotatably mounted on the inner side of another mounting plate (13) in the group of two.

4. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 3, characterized in that: A first adjustment plate (15) is fixedly mounted on the output shaft of the second motor (14); a second adjustment plate (16) is rotatably mounted on the upper end of the first adjustment plate (15); and a positioning connector (17) is commonly fixedly mounted inside the upper ends of a plurality of the second adjustment plates (16).

5. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 4, characterized in that: A rotating shaft rod (18) is fixedly mounted on the output shaft of the positioning connector (17), a secondary rod (21) is arranged outside the rotating shaft rod (18), and both the rotating shaft rod (18) and the secondary rod (21) are slidably mounted inside the external threaded rod (25).

6. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 5, characterized in that: A through hole (22) is provided on the circumferential surface of the lower end of the secondary rod (21); a first stirring rod (19) is rotatably mounted on the circumferential surface of the rotating shaft rod (18); a second stirring rod (20) is rotatably mounted on the lower end of the first stirring rod (19); the lower end of the second stirring rod (20) is rotatably mounted on the inner lower part of the through hole (22); and a copper rotor (211) is fixedly mounted on the lower end of the secondary rod (21).

7. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 5, characterized in that: A fourth motor (27) is fixedly mounted inside the extrusion disk (26), a first gear (28) is fixedly mounted on the output shaft of the fourth motor (27), a mounting shell (29) is fixedly mounted at the lower end of the extrusion disk (26), and a slide groove (30) is provided from the inner bottom surface to the outer bottom surface of the mounting shell (29).

8. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 7, characterized in that: A gear ring (31) is rotatably mounted inside the mounting shell (29), an outer circumferential surface of the gear ring (31) is provided with an external tooth groove (32), the first gear (28) passes through the mounting shell (29) and meshes with the gear ring (31), a second gear (33) is rotatably mounted inside the mounting shell (29) and located inside the gear ring (31), a blocking plate (34) is slidably mounted inside the mounting shell (29), a cylinder is provided on the lower end surface of the blocking plate (34), and the cylinder is slidably mounted inside the slide groove (30), and the tooth groove of the straight edge of the blocking plate (34) meshes with the adjacent second gear (33).

9. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 6, characterized in that: A feeding port (2) is provided on the circumferential surface of the mixing barrel (1) and the inside thereof; a discharge pipe (3) is fixedly mounted on the bottom surface of the mixing barrel (1); an annular groove (4) is provided on the inner bottom surface of the mixing barrel (1); the copper rotor (211) is slidably mounted inside the annular groove (4); and a sealing shell (5) is fixedly mounted on the inner bottom surface of the mixing barrel (1).

10. The device for preparing an injectable hydrogel loaded with stem cells for tissue repair according to claim 1, characterized in that: A first motor (6) is fixedly mounted on the lower end surface of the mixing barrel (1); a magnetic rotor (7) is fixedly mounted on the output shaft of the first motor (6); the magnetic rotor (7) is located inside the sealing shell (5); and a support leg (8) is fixedly mounted on the outer circumferential surface of the mixing barrel (1).

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