Culture medium preparation device

Abstract

The invention discloses a culture medium preparation device, and relates to the technical field of culture media, the culture medium preparation device comprises a preparation box fixedly communicated with a liquid inlet pipe and a liquid outlet pipe, the interior of the preparation box is hollow, a rotating gear ring is installed in the preparation box through a rotating assembly, and a driving rotating component matched with the rotating gear ring is installed on the preparation box; a preparation frame is rotationally mounted on the rotating gear ring, and a rotation control component is mounted between the preparation box and the preparation frame; a first stirring assembly is installed on one side of the preparation frame, a second stirring assembly is installed between the other side of the preparation frame and the rotating gear ring, and the flowing direction of liquid stirred and driven by the first stirring assembly is opposite to the flowing direction of liquid stirred and driven by the second stirring assembly. The preparation device has the advantages that the motor is used for controlling the rotating gear ring to rotate, the preparation frame can be driven to rotate in the rotating process of the rotating gear ring, and liquid in the preparation device can be rapidly and fully mixed through rotation of the rotating gear ring and the preparation frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of culture medium, in particular to a culture medium preparation device. BACKGROUND

[0002] Culture medium refers to a nutrient medium prepared by combining different nutrients to provide microorganisms, plants or animals (or tissues) with growth and reproduction. The commonly used stirring preparation device in the specific preparation process is divided into magnetic stirring and mechanical stirring. Mechanical stirring is mostly stirring rod preparation that can be forward and reverse. However, the stirring effect of this mechanical stirring method is relatively general, and the time required for stirring and mixing is relatively long. Therefore, we propose a culture medium preparation device to solve the above problems. SUMMARY

[0003] The purpose of the present application is to solve the problems raised in the background art and to provide a culture medium preparation device.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A culture medium preparation device comprises a preparation box which is fixedly connected with a liquid inlet pipe and a liquid outlet pipe, and the preparation box is hollow. A rotating gear ring is installed in the preparation box through a rotating assembly, and a driving rotating member matched with the rotating gear ring is installed on the preparation box.

[0006] A preparation rack is rotatably installed on the rotating gear ring, and a control rotation member is installed between the preparation box and the preparation rack.

[0007] A stirring assembly one is installed on one side of the preparation rack, a stirring assembly two is installed between the other side of the preparation rack and the rotating gear ring, and the liquid flow direction driven by the stirring assembly one is opposite to the liquid flow direction driven by the stirring assembly two.

[0008] A reciprocating screw is arranged in the middle section of the preparation rack, a lifting disc is installed on the reciprocating screw through a nut, a vertical stirring assembly is installed between the lifting disc and the rotating gear ring, and the liquid flow direction driven by the vertical stirring assembly is perpendicular to the liquid flow direction driven by the stirring assembly one.

[0009] A liquid spraying member is installed between the rotating gear ring and the preparation box, and the liquid spraying member is matched with the vertical stirring assembly.

[0010] In the above culture medium preparation device, the rotating assembly comprises an annular limiting groove and a limiting clamping rod. The annular limiting grooves are arranged on the inner walls of both sides of the preparation box. The limiting clamping rods are fixedly installed on both sides of the rotating gear ring and matched with the annular limiting grooves.

[0011] A plurality of inclined rods are fixedly arranged between the corresponding two limiting clamping rods, and the plurality of inclined rods on the same side of the rotating gear ring are on different vertical planes.

[0012] In the medium preparation device, the driving rotation member comprises a cover, a motor, a rotating shaft and a rotating gear one, the cover and the motor are fixedly installed outside the preparation box, the cover is in communication with the preparation box, the rotating shaft is fixedly installed on the driving end of the motor, and the end of the rotating shaft away from the motor is sealingly and rotatably installed in the cover, and the part of the rotating shaft in the cover is fixedly installed with the rotating gear one engaged with the rotating gear ring.

[0013] The motor is a servo motor.

[0014] In the medium preparation device, the control rotation member comprises a bevel gear, a fixed rod one and a fixed gear ring, the bevel gear is fixedly installed on the preparation frame, and the fixed gear ring engaged with the bevel gear is fixedly installed on the inner wall of one side of the preparation box through a plurality of fixed rod ones.

[0015] The bevel gear is two and symmetrically fixedly installed on the two ends of the preparation frame.

[0016] In the medium preparation device, the stirring assembly one comprises an upper stirring rod and a fixed disc, a plurality of fixed discs are fixedly installed on one side of the preparation frame, and a plurality of upper stirring rods are fixedly installed on each fixed disc.

[0017] The two sides of the upper stirring rod are provided with inclined surfaces.

[0018] In the medium preparation device, the stirring assembly two comprises a support rotation assembly, a direction changing transmission assembly, an inner gear ring, a vertical rod, a lower stirring rod and a rotating disc, the inner gear ring is installed on the rotating gear ring through the support rotation assembly, the direction changing transmission assembly is installed between the preparation frame and the inner gear ring, the rotating disc is rotatably installed on the preparation frame, a plurality of lower stirring rods are fixedly installed on the rotating disc, and the vertical rod is fixedly installed between part of the lower stirring rods and the inner gear ring.

[0019] In the medium preparation device, the support rotation assembly comprises an annular support groove, a support ring and a fixed block, the outer side of the inner gear ring is provided with the annular support groove, and the support ring matched with the annular support groove is fixedly installed on the rotating gear ring through the two fixed blocks.

[0020] The support ring is fixedly installed with the elastic pad matched with the annular support groove.

[0021] In the medium preparation device, the direction changing transmission assembly comprises a gear one and a gear two, the gear one is fixedly installed on the preparation frame, the gear two is rotatably installed on the rotating gear ring, and the gear two is engaged with the gear one and the inner gear ring.

[0022] In the medium preparation device, the vertical stirring assembly comprises shaft bodies, mixing rods, rotating gears two, fixed rods two and a rack, a plurality of shaft bodies are rotatably installed on the lifting disc, a plurality of mixing rods and a rotating gear two are fixedly installed on each shaft body, two racks are fixedly installed on the rotating gear two through two fixed rods two, and the racks are engaged with the corresponding rotating gears two.

[0023] The racks are respectively located on different sides of the corresponding rotating gears two.

[0024] In the medium preparation device, the liquid spraying member comprises rod supports, magnetic blocks one, circulating cylinders, pipes one, pipes two, sealing sliding plates, sealing rods and magnetic blocks two, two magnetic blocks one are fixedly installed on the rotating gear two through the rod supports, the same sides of the two magnetic blocks one are opposite in magnetism, two circulating cylinders are fixedly installed in the preparation box, a plurality of pipes one are fixedly and communicatively connected to one side of each of the two circulating cylinders, a plurality of pipes two are fixedly and communicatively connected to the two circulating cylinders, a sealing sliding plate is sealingly and slidably installed in each of the two circulating cylinders, a sealing rod is fixedly installed on the sealing sliding plate, and the sealing rod sealingly penetrates through the corresponding circulating cylinder and is fixedly installed with a magnetic block two.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] 1. The rotating gear two is controlled to rotate by the motor, and the preparation frame is also rotated during the rotation of the rotating gear two, so that the liquid in the preparation device can be quickly and fully mixed by the rotation of the rotating gear two and the preparation frame.

[0027] 2. The rotating and mixing effects in the horizontal and vertical directions are provided on the preparation frame, and the stirring in the horizontal and vertical directions can produce the effect that the two water flows flow in opposite directions, and the stirring in the horizontal and vertical directions can also cooperate with each other, thereby further improving the overall mixing effect. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A structure diagram of the medium preparation device is provided.

[0029] Figure 2 A cross-sectional view after rotating by a certain angle. Figure 1

[0030] A structure diagram after removing the preparation box and rotating by a certain angle. Figure 3 Figure 2 A structure diagram after rotating the rotating gear two by a certain angle.

[0031] Figure 4 A structure diagram after rotating the rotating gear two by a certain angle. Figure 3

[0032] ​​Figure 5 As Figure 4 Structure diagram of the middle lower stirring rod part after rotating by a certain angle;

[0033] Figure 6 As Figure 5 Structure diagram of the middle after removing the support ring and rotating by a certain angle;

[0034] Figure 7 As Figure 3 Structure diagram of the middle circulating cylinder part after rotating by a certain angle;

[0035] Figure 8 As Figure 7 Sectional view of a single circulating cylinder.

[0036] In the figure: 1, preparation box; 2, liquid inlet pipe; 3, liquid outlet pipe; 4, cover; 5, rotating tooth ring; 6, annular limiting groove; 7, limiting clamping rod; 8, motor; 9, rotating shaft; 10, rotating gear one; 11, preparation frame; 12, helical gear; 13, fixed rod one; 14, fixed tooth ring; 15, upper stirring rod; 16, inner tooth ring; 17, annular support groove; 18, support ring; 19, fixed block; 20, gear one; 21, gear two; 22, vertical rod; 23, lower stirring rod; 24, rotating disc; 25, lifting disc; 26, shaft body; 27, mixing rod; 28, rotating gear two; 29, fixed rod two; 30, rack; 31, rod frame; 32, magnetic block one; 33, circulating cylinder; 34, pipe one; 35, pipe two; 36, sealing sliding plate; 37, sealing rod; 38, magnetic block two. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] Referring to Figures 1-8 A culture medium preparation device includes a preparation box 1 fixedly connected with a liquid inlet pipe 2 and a liquid outlet pipe 3, and the preparation box 1 is hollow. The liquid inlet pipe 2 is capped, and the cap can be installed on the liquid inlet pipe 2 in a clamping or threaded manner. The number of liquid inlet pipes 2 can also be set to be multiple according to requirements. The liquid outlet pipe 3 is provided with a valve, and the valve can be an electric valve. The inner bottom wall of the preparation box 1 is preferably provided with a slope, and the slope is also arc-shaped as a whole. The height of both sides is higher than the height of the middle, and the liquid outlet pipe 3 is arranged at the middle position, so that the liquid in the preparation box 1 can also flow out better through the liquid outlet pipe 3.

[0039] A rotating gear ring 5 is installed in the preparation box 1 through a rotating assembly. The rotating assembly includes an annular limit groove 6 and a limit clamping rod 7. Annular limit grooves 6 are opened on the inner walls of both sides of the preparation box 1, and multiple limit clamping rods 7 that cooperate with the annular limit grooves 6 are fixedly installed on both sides of the rotating gear ring 5; through the coordinated use of the limit clamping rod 7 and the annular limit groove 6, the rotating gear ring 5 can be rotated in the preparation box 1. Furthermore, multiple inclined rods can be fixedly provided between the corresponding two limit clamping rods 7, and the multiple inclined rods on the same side of the rotating gear ring 5 are on different vertical planes, so that the limit clamping rod 7 can drive the inclined rod to rotate together during the rotation process, which can further improve the overall preparation and mixing effect.

[0040] Reference Figures 1-8 , a driving rotating component that cooperates with the rotating gear ring 5 is installed on the preparation box 1; the driving rotating component includes a cover body 4, a motor 8, a rotating shaft 9, and a rotating gear 10. The cover body 4 and the motor 8 are fixedly installed on the outside of the preparation box 1, and the cover body 4 is communicated with the preparation box 1. A rotating shaft 9 is fixedly installed on the driving end of the motor 8, and the end of the rotating shaft 9 away from the motor 8 is sealed and rotatably installed in the cover body 4, and the part of the rotating shaft 9 located in the cover body 4 is fixedly installed with a rotating gear 10 that meshes with the rotating gear ring 5; when the motor 8 is working, it can drive the rotating gear 10 to rotate, and the rotating gear ring 5 can be rotated by the rotation of the rotating gear 10. Furthermore, the motor 8 is set to a servo motor, and the rotating gear ring 5 can be controlled to rotate forward and reverse, which can further improve the overall preparation and mixing effect.

[0041] Reference Figures 1-8 A preparation rack 11 is rotatably mounted on the rotating gear ring 5, and a self-rotation control component is installed between the preparation box 1 and the preparation rack 11; the self-rotation control component includes a bevel gear 12, a fixed rod 13, and a fixed gear ring 14. A bevel gear 12 is fixedly mounted on the preparation rack 11, and a fixed gear ring 14 engaged with the bevel gear 12 is fixedly mounted on the inner wall of one side of the preparation box 1 through multiple fixed rods 13; through the coordinated use of the bevel gear 12 and the fixed gear ring 14, the rotating gear ring 5 can drive the preparation rack 11 to rotate during the rotation process, which can further improve the overall stirring preparation effect.

[0042] There are two helical gears 12 , which are symmetrically fixedly mounted on both ends of the preparation rack 11 , so that both ends of the preparation rack 11 are subjected to a rotational force, making the rotation of the preparation rack 11 more stable.

[0043] Reference Figures 1-8, one side of the preparation rack 11 is provided with the stirring assembly one, the other side of the preparation rack 11 is provided with the stirring assembly two between the rotating tooth ring 5, and the liquid flow direction stirred by the stirring assembly one is opposite to the liquid flow direction stirred by the stirring assembly two;The stirring assembly one comprises an upper stirring rod 15, a fixed disc, a plurality of fixed discs are fixedly installed on one side of the preparation rack 11, and a plurality of upper stirring rods 15 are fixedly installed on each fixed disc;The two sides of the upper stirring rod 15 are provided with inclined surfaces, which can further improve the mixing effect and reduce the resistance of the upper stirring rod 15 in the stirring process.

[0044] The stirring assembly two comprises a support rotating assembly, a direction changing transmission assembly, an inner tooth ring 16, a vertical rod 22, a lower stirring rod 23 and a rotating disc 24, the inner tooth ring 16 is installed on the rotating tooth ring 5 through the support rotating assembly, the direction changing transmission assembly is installed between the preparation rack 11 and the inner tooth ring 16, the rotating disc 24 is rotatably installed on the preparation rack 11, a plurality of lower stirring rods 23 are fixedly installed on the rotating disc 24, and the vertical rod 22 is fixedly installed between part of the lower stirring rods 23 and the inner tooth ring 16;The rotating direction of the lower stirring rod 23 is opposite to that of the upper stirring rod 15, and the positions of the lower stirring rod 23 and the upper stirring rod 15 are also changeable with the rotating position of the rotating tooth ring 5, so that the liquid at different positions in the preparation box 1 can be better stirred.

[0045] The support rotating assembly comprises an annular support groove 17, a support ring 18 and a fixed block 19, the outer side of the inner tooth ring 16 is provided with the annular support groove 17, and the support ring 18 matched with the annular support groove 17 is fixedly installed on the rotating tooth ring 5 through the two fixed blocks 19;The support ring 18 is fixedly installed with the elastic pad matched with the annular support groove 17;The elastic pad can effectively reduce the wear caused by the relative rotation between the support ring 18 and the annular support groove 17, and the elasticity of the elastic pad can make the two more closely fit.

[0046] The direction changing transmission assembly comprises a gear one 20 and a gear two 21, the gear one 20 is fixedly installed on the preparation rack 11, the gear two 21 is rotatably installed on the rotating tooth ring 5, and the gear two 21 is engaged with the gear one 20 and the inner tooth ring 16;The setting of the direction changing transmission assembly can make the rotating direction of the inner tooth ring 16 opposite to the self-rotating direction of the preparation rack 11 during the rotation of the preparation rack 11.

[0047] Referring to Figures 1-8The middle section of the preparation frame 11 is provided with a reciprocating screw thread, a lifting disc 25 is installed on the reciprocating screw thread through a nut, a vertical stirring assembly is installed between the lifting disc 25 and the rotating tooth ring 5, and the liquid flow direction stirred by the vertical stirring assembly is perpendicular to the liquid flow direction stirred by the stirring assembly; the vertical stirring assembly comprises a shaft body 26, a mixing rod 27, a rotating gear two 28, a fixed rod two 29 and a rack 30, a plurality of shaft bodies 26 are rotatably installed on the lifting disc 25, a plurality of mixing rods 27 and a rotating gear two 28 are fixedly installed on each shaft body 26, two racks 30 are fixedly installed on the rotating tooth ring 5 through two fixed rods two 29, and the rack 30 is engaged with the corresponding rotating gear two 28; and the rack 30 is located on different sides of the corresponding rotating gear two 28, and the rotating directions of the two shaft bodies 26 are opposite, so that the overall stirring and mixing effect can be better improved.

[0048] Referring to Figures 1-8 The liquid spraying member is installed between the rotating tooth ring 5 and the preparation box 1, and is matched with the vertical stirring assembly; the liquid spraying member comprises a rod frame 31, a magnetic block one 32, a circulating cylinder 33, a pipe one 34, a pipe two 35, a sealing sliding plate 36, a sealing rod 37 and a magnetic block two 38, two magnetic block ones 32 are fixedly installed on the rotating tooth ring 5 through the rod frame 31, and the same side of the two magnetic block ones 32 is opposite in magnetism, two circulating cylinders 33 are fixedly installed in the preparation box 1, a plurality of pipe ones 34 are fixedly and communicatively arranged on the side close to each other of the two circulating cylinders 33, a plurality of pipe twos 35 are fixedly and communicatively arranged on the two circulating cylinders 33, one sealing sliding plate 36 is sealingly and slidably installed in each of the two circulating cylinders 33, a sealing rod 37 is fixedly installed on the sealing sliding plate 36, and the sealing rod 37 sealingly penetrates through the corresponding circulating cylinder 33 and is fixedly installed with a magnetic block two 38; when the rotating tooth ring 5 rotates, the sealing sliding plate 36 can reciprocate in the circulating cylinder 33, so that the liquid flow is caused, and the preparation effect is further improved.

[0049] Further, the fixed connection is broadly understood unless otherwise specifically defined and limited, for example, it can be welding, or gluing, or integrally formed, and the like.

[0050] In the application, the liquid raw material required for preparation is delivered into the preparation box 1 through the liquid inlet pipe 2, then the motor 8 is started, the motor 8 works to drive the rotating gear one 10 to rotate through the rotating shaft 9, the rotating gear one 10 drives the rotating tooth ring 5 to rotate,

[0051] The rotating tooth ring 5 rotates through the rod frame 31 to drive the magnetic block one 32 to rotate. The rotation of the magnetic block one 32 drives the corresponding magnetic block two 38 to reciprocate. The reciprocation of the magnetic block two 38 drives the sealing slide plate 36 to reciprocate through the sealing rod 37. The sealing slide plate 36 can suck the liquid outside the circulating cylinder 33 and continuously extrude the liquid in the reciprocation process, thereby generating the flow of the liquid and achieving the mixing and stirring effect.

[0052] The rotating tooth ring 5 rotates through the bevel gear 12 and the fixed tooth ring 14 to drive the preparation frame 11 to rotate. At this time, the preparation frame 11 rotates around the axis, and the preparation frame 11 rotates around the axis while rotating around the axis. The preparation frame 11 drives the corresponding upper stirring rod 15 to rotate. The preparation frame 11 drives the inner tooth ring 16 to rotate through the gear one 20 and the gear two 21. The inner tooth ring 16 drives the plurality of lower stirring rods 23 to rotate through the cooperation of the vertical rod 22 and the rotating disc 24. At this time, the rotation direction of the lower stirring rod 23 is opposite to that of the upper stirring rod 15, which further improves the mixing and stirring effect.

[0053] The preparation frame 11 drives the lifting disc 25 to reciprocate in the vertical direction. The reciprocation of the lifting disc 25 drives the shaft body 26 and the mixing rod 27 to move (move relative to the length direction of the preparation frame 11). The shaft body 26 moves through the cooperation of the rotating gear two 28 and the rack 30, so that the shaft body 26 drives the mixing rod 27 to rotate. The rotation directions of the two shaft bodies 26 are opposite, which can further improve the mixing and stirring effect.

[0054] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A culture medium preparation device, comprising a preparation box (1) fixedly connected to a liquid inlet pipe (2) and a liquid outlet pipe (3), wherein the preparation box (1) is hollow, characterized in that: A rotating gear ring (5) is installed in the preparation box (1) via a rotating assembly, and a driving rotating component that matches the rotating gear ring (5) is installed on the preparation box (1); A preparation rack (11) is rotatably mounted on the rotating gear ring (5), and a self-rotation control member is installed between the preparation box (1) and the preparation rack (11); A stirring component 1 is installed on one side of the preparation frame (11), and a stirring component 2 is installed between the other side of the preparation frame (11) and the rotating gear ring (5), and the flow direction of the liquid stirred by the stirring component 1 is opposite to the flow direction of the liquid stirred by the stirring component 2; The middle section of the preparation frame (11) is provided with a reciprocating thread, a lifting plate (25) is mounted on the reciprocating thread via a nut, a vertical stirring assembly is mounted between the lifting plate (25) and the rotating gear ring (5), and the liquid flow direction driven by the vertical stirring assembly is perpendicular to the liquid flow direction driven by the stirring assembly; A liquid spraying component is installed between the rotating gear ring (5) and the preparation box (1), and the liquid spraying component is matched with the vertical stirring component.

2. A culture medium preparation device according to claim 1, characterized in that: The rotating assembly comprises an annular limiting groove (6) and a limiting clamping rod (7); an annular limiting groove (6) is provided on both inner walls of the preparation box (1); and a plurality of limiting clamping rods (7) matching the annular limiting groove (6) are fixedly installed on both sides of the rotating gear ring (5); A plurality of inclined rods are fixedly arranged between the two corresponding limit clamping rods (7), and the plurality of inclined rods on the same side of the rotating gear ring (5) are located on different vertical planes.

3. A culture medium preparation device according to claim 1, characterized in that: The driving rotating component comprises a cover (4), a motor (8), a rotating shaft (9), and a rotating gear (10); the cover (4) and the motor (8) are fixedly mounted on the outside of the preparation box (1), and the cover (4) is connected to the preparation box (1); a rotating shaft (9) is fixedly mounted on the driving end of the motor (8), and an end of the rotating shaft (9) away from the motor (8) is sealed and rotatably mounted in the cover (4); a rotating gear (10) meshing with the rotating gear ring (5) is fixedly mounted on the part of the rotating shaft (9) located in the cover (4); The motor (8) is a servo motor.

4. A culture medium preparation device according to claim 1, characterized in that: The control rotation component comprises a bevel gear (12), a fixed rod (13), and a fixed gear ring (14); the bevel gear (12) is fixedly mounted on the preparation frame (11); and a fixed gear ring (14) meshing with the bevel gear (12) is fixedly mounted on the inner wall of one side of the preparation box (1) via a plurality of fixed rods (13); There are two helical gears (12), which are symmetrically fixedly mounted at both ends of the preparation frame (11).

5. A culture medium preparation device according to claim 1, characterized in that: The stirring assembly includes an upper stirring rod (15) and a fixed plate. A plurality of fixed plates are fixedly mounted on one side of the preparation frame (11), and a plurality of upper stirring rods (15) are fixedly mounted on each of the fixed plates. Both sides of the upper stirring rod (15) are arranged with inclined surfaces.

6. A culture medium preparation device according to claim 1, characterized in that: The stirring assembly 2 comprises a supporting rotating assembly, a direction-changing transmission assembly, an inner gear ring (16), a vertical rod (22), a lower stirring rod (23), and a rotating disk (24); the inner gear ring (16) is mounted on the rotating gear ring (5) via the supporting rotating assembly, and a direction-changing transmission assembly is mounted between the preparation frame (11) and the inner gear ring (16); a rotating disk (24) is rotatably mounted on the preparation frame (11), a plurality of lower stirring rods (23) are fixedly mounted on the rotating disk (24), and vertical rods (22) are fixedly mounted between some of the lower stirring rods (23) and the inner gear ring (16).

7. A culture medium preparation device according to claim 6, characterized in that: The supporting rotating assembly comprises an annular support groove (17), a support ring (18), and a fixing block (19); an annular support groove (17) is provided on the outer side of the inner gear ring (16); a support ring (18) matching the annular support groove (17) is fixedly mounted on the rotating gear ring (5) via two fixing blocks (19); An elastic pad matched with the annular support groove (17) is fixedly mounted on the support ring (18).

8. A culture medium preparation device according to claim 7, characterized in that: The direction-changing transmission assembly includes gear one (20) and gear two (21). Gear one (20) is fixedly mounted on the preparation frame (11), and gear two (21) is rotatably mounted on the rotating gear ring (5), and gear two (21) is meshed with gear one (20) and the inner gear ring (16).

9. A culture medium preparation device according to claim 1, characterized in that: The vertical stirring assembly comprises a shaft (26), a mixing rod (27), a rotating gear (28), a fixed rod (29), and a rack (30); a plurality of shafts (26) are rotatably mounted on the lifting plate (25); a plurality of mixing rods (27) and a rotating gear (28) are fixedly mounted on each shaft (26); two racks (30) are fixedly mounted on the rotating gear ring (5) via two fixed rods (29), and the racks (30) are meshed with the corresponding rotating gears (28); The racks (30) are respectively located on different sides of the corresponding rotating gear 2 (28).

10. A culture medium preparation device according to claim 1, characterized in that: The liquid spraying component includes a rod frame (31), a magnetic block one (32), a circulation cylinder (33), a tube one (34), a tube two (35), a sealing slide (36), a sealing rod (37), and a magnetic block two (38). Two magnetic blocks one (32) are fixedly installed on the rotating gear ring (5) through the rod frame (31), and the magnetic properties of the two magnetic blocks one (32) on the same side are opposite. Two circulation cylinders (33) are fixedly installed in the preparation box (1). The sides of the two circulation cylinders (33) that are close to each other are fixedly connected with multiple tubes one (34). The two circulation cylinders (33) are also fixedly connected with multiple tubes two (35). A sealing slide (36) is sealed and slidably installed in the two circulation cylinders (33). A sealing rod (37) is fixedly installed on the sealing slide (36), and the sealing rod (37) seals and passes through the corresponding circulation cylinder (33) and is fixedly installed with a magnetic block two (38).

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