Raw material fermentation equipment for veterinary drug production

Abstract

The invention relates to the technical field of fermentation equipment, in particular to raw material fermentation equipment for veterinary drug production, which comprises a tank body and a vertical stirring shaft arranged at the center position of the tank body, the upper end of the stirring shaft is connected with a main stirring motor, the raw material fermentation equipment further comprises stirring blades, the stirring blades comprise inner side sheets and outer side sheets, the inner side sheets and the outer side sheets are plate-shaped, and the outer side sheets and the inner side sheets are connected with each other. One end of each inner side piece is rotationally connected to the stirring shaft, the other end of each inner side piece is slidably connected with the corresponding outer side piece, and the rotationally-connected axis of the inner side pieces and the stirring shaft is parallel to the length direction of the stirring blades; the driving device is used for driving the outer side sheet to move along the length direction of the stirring blade so as to adjust the length of the stirring blade; and the adjusting device is used for driving the stirring blades to vertically rotate so as to adjust the included angle between the stirring blades and the vertical surface. By adjusting the length and angle of the stirring blades, the effect of adjusting the mixing efficiency while adapting to the rotating speed of the stirring shaft is achieved.

Description

Technical Field

[0001] This invention relates to the technical field of fermentation equipment, and specifically to a fermentation equipment for raw materials used in veterinary drug production. Background Technology

[0002] Fermentation of veterinary drug raw materials is a method that uses microorganisms to biologically transform these materials. This process not only alters the properties of the original drug and increases the proportion of its active components, but also generates new metabolites or secondary metabolites, thereby enhancing the drug's efficacy and reducing its potential toxicity and side effects. In the livestock industry, fermented veterinary drugs are considered an innovative feed additive that can effectively improve animal growth performance and immunity.

[0003] Chinese patent document CN201901671U discloses a fermenter, including a tank body and a stirring shaft disposed within the tank body. The stirring shaft is equipped with a stirrer, which includes a propeller-type stirrer and a turbine-type stirrer. The turbine-type stirrer is located at the lower end of the stirring shaft, and the propeller-type stirrer is located above the turbine-type stirrer. The propeller-type stirrer has axial-flow blades, and the turbine-type stirrer has parabolic disc turbine blades. The main function of the turbine-type stirrer is to cause the fermentation material to flow radially. Both the propeller-type stirrer and the turbine-type stirrer are fixed on the stirring shaft and rotate together with it. Thus, the fermentation material is agitated under the combined action of the propeller-type stirrer and the turbine-type stirrer, improving mixing efficiency.

[0004] However, the viscosity of the fermentation broth, cell concentration, and required dissolved oxygen level all change throughout the fermentation process, thus altering the mixing requirements of the fermentation materials. These variations limit the stirring speed; for example, excessively fast stirring may damage the cells. Therefore, we need to design a fermentation device that can regulate both the stirring speed and the mixing efficiency. Summary of the Invention

[0005] This invention provides a fermentation device for raw materials used in veterinary drug production, aiming to solve the problem of how to adjust the mixing efficiency while controlling the stirring speed.

[0006] The present invention provides a fermentation device for raw materials used in veterinary drug production, comprising a tank and a vertical stirring shaft disposed at the center of the tank, wherein a main stirring motor for controlling the rotational speed of the stirring shaft is connected to the upper end of the stirring shaft, and further comprising: The stirring blade includes an inner plate and an outer plate, both of which are plate-shaped. One end of the inner plate is rotatably connected to the stirring shaft, and the other end is slidably connected to the outer plate. The axis of rotation between the inner plate and the stirring shaft is parallel to the length direction of the stirring blade. A driving device is used to drive the outer side plate to move along the length direction of the stirring blade, so as to adjust the length of the stirring blade; An adjusting device is used to drive the stirring blade to rotate vertically in order to adjust the angle between the stirring blade and the vertical plane.

[0007] The effect is that the inner and outer stirring blades allow for dynamic adjustment of the stirring length. The inner blade is connected to the stirring shaft, while the outer blade can slide along the length of the stirring blade. This design allows for flexible adjustment of the overall length of the stirring blades according to the characteristics of the fermentation material and process requirements. When a larger stirring range is needed, the stirring blades can be extended via a drive device, and vice versa. The application of the adjustment device allows the stirring blades to rotate vertically, thereby adjusting the angle between them and the vertical plane. This function is crucial for adapting to fermentation materials with different viscosities and densities. By adjusting the angle, the stirring path can be optimized, dead zones can be reduced, and the material can be fully and uniformly stirred within the tank, which is beneficial to the growth and metabolism of microorganisms and further improves the fermentation quality.

[0008] The rotational speed of the stirring shaft is controlled by the main stirring motor, and the shaft speed is dynamically adjusted in conjunction with the stirring blades. By adjusting the stirring speed and combining it with changes in the length and angle of the stirring blades, the energy consumption of the main stirring motor can be minimized while ensuring the stirring effect.

[0009] Preferably, the adjusting device includes a vertical rod and a columnar drive cam. The drive cam is coaxially fixed on the vertical rod. An elongated hole perpendicular to the length direction of the stirring blade is opened on the outer side plate. The vertical rod passes through the elongated hole and the drive cam is located in the elongated hole. Connecting rods are fixed at both ends of the elongated hole. The ends of the connecting rods are fitted into the grooves of the drive cam. The vertical rod drives the drive cam to rotate. Through the cooperation between the connecting rods and the drive cam, the stirring blade changes angle relative to the vertical plane. A driver for driving the vertical rod to rotate is connected to the vertical rod.

[0010] Its effect is as follows: the vertical rod rotates under the drive of the actuator. The coaxially fixed drive cam on the vertical rod, along with the elongated hole and connecting rod on the outer side plate, causes the connecting rod to drive the stirring blades to rotate vertically. This allows for adjustment of the angle of the stirring blades relative to the vertical plane, enabling the equipment to adapt to fermentation materials of different viscosities and densities, reducing dead zones in the stirring process, and accommodating stirring efficiency at different speeds. The design of the vertical rod and drive cam makes the entire adjustment device compact and space-saving. This is particularly important when the internal space of the fermenter is limited, effectively improving space utilization.

[0011] Preferably, the vertical rod is a hollow structure with multiple spray holes on its side wall, which are connected to the interior of the vertical rod. The upper end of the vertical rod is connected to an inlet pipe for injecting cleaning fluid into the vertical rod. During the stirring process, the vertical rod rotates on its own axis while revolving around the stirring shaft, spraying cleaning fluid into the tank through the spray holes. When the stirring blades extend to their maximum length, the cleaning fluid sprayed from the vertical rod cleans the inner wall of the tank and the vertical rod itself. When the stirring blades retract to their minimum length, the cleaning fluid sprayed from the vertical rod cleans the stirring shaft.

[0012] Its advantages are as follows: the vertical rod is designed with a hollow structure and multiple spray holes on its side wall, allowing the cleaning fluid to be sprayed evenly and widely into the tank. During the stirring process, the vertical rod revolves with the stirring shaft and rotates on its own axis, ensuring that the cleaning fluid covers every corner of the tank, thus greatly improving cleaning efficiency. Simultaneously, the vertical rod reaches the inside of the tank when the stirring blades are at their maximum length, resulting in better cleaning of the inner wall of the tank by the sprayed cleaning fluid, while the splashed cleaning fluid also cleans the vertical rod itself. When the stirring blades retract to their minimum length, the cleaning fluid sprayed from the vertical rod can rinse the side walls around the stirring shaft.

[0013] Preferably, the vertical rod is provided with an inner tube, and the side wall of the inner tube has liquid outlet holes that correspond one-to-one with the spray holes. The inner tube is slidably and sealed within the vertical rod. A return spring is connected to the inner tube to drive the inner tube to slide along the vertical rod and to misalign the liquid outlet holes with the spray holes. When pressurized cleaning fluid enters the inlet pipe, the pressure of the cleaning fluid overcomes the elastic force of the return spring, pushing the inner tube to slide along the vertical rod until the liquid outlet holes correspond one-to-one with the spray holes, causing the cleaning fluid to spray out.

[0014] Its effect is as follows: when the cleaning fluid enters the inlet pipe under pressure, this pressure can overcome the elastic force of the return spring, pushing the inner tube to slide, so that the outlet hole and the spray hole correspond one-to-one, thereby ensuring that the cleaning fluid is sprayed out under appropriate pressure, and also helping to prevent the cleaning fluid from leaking when there is no pressure. When the supply of cleaning fluid stops or the pressure drops, the return spring pushes the inner tube back to its original position, causing the outlet hole and the spray hole to be misaligned, preventing fermented material from entering the vertical rod.

[0015] Preferably, a guide sleeve is fixedly installed on the stirring shaft, and a support rod is slidably connected inside the guide sleeve. The length directions of the guide sleeve and the support rod are parallel to the length direction of the stirring blade. The upper end of the vertical rod is rotatably connected to the end of the support rod away from the guide sleeve. A fixing tube is fixedly installed inside the guide sleeve. The fixing tube is connected to the liquid inlet pipe through a rotary joint, and the fixing tube is inserted into the support rod and slidably and sealingly connected to it. The interior of the vertical rod is connected to the internal cavity of the support rod through a connecting hole.

[0016] Preferably, the driving device includes a driving disk, a gear, and a driving motor. The driving disk is rotatably connected to the stirring shaft, the driving motor is fixed to the guide sleeve, the gear is coaxially fixed to the output shaft of the driving motor, and is used to drive the driving disk to rotate. The driving disk has a driving groove, and a pin is fixedly installed on the support rod and inserted into the driving groove. When the pin moves in the driving groove, the support rod moves linearly along the length direction of the guide sleeve.

[0017] Preferably, the driver includes a rotary motor, a telescopic rod, a worm gear, and a worm wheel. The worm gear is rotatably mounted on a support rod, the rotary motor is fixed on a stirring shaft, the output shaft of the rotary motor is rotatably connected to the worm gear through the telescopic rod, and the worm wheel is coaxially fixed on a vertical rod.

[0018] Its effect is as follows: the rotating motor drives the worm to rotate through the telescopic rod, so that the worm and the worm wheel can maintain a stable connection. Moreover, the rotating motor is located on the stirring shaft, which can reduce the centrifugal force generated when the motor rotates with the stirring shaft. At the same time, the self-locking effect of the worm and the worm wheel can keep the angle of the stirring blades stably maintained at the set position after adjustment.

[0019] Preferably, the stirring blades are arranged in multiple layers along the length of the stirring shaft, with two blades evenly arranged in each layer around the circumference of the stirring shaft, and the lengths of the two stirring blades in each layer are simultaneously extended or shortened. When the tilt angle between the stirring blades and the vertical plane is adjusted, the rotation directions of the two stirring blades in the same layer are opposite, and the same vertical rod passes through multiple stirring blades sequentially from top to bottom.

[0020] Its effect is that each layer is equipped with two evenly distributed stirring blades. Under the action of the drive disc, the two stirring blades in the same layer can extend and retract synchronously. When adjusting the tilt angle, the two stirring blades in the same layer rotate in opposite directions, thus ensuring the balance of stirring force.

[0021] Preferably, a sealing ring is provided at the end where the inner side plate connects to the outer side plate, and the end of the inner side plate away from the outer side plate is connected to the outside through the hollow inside the stirring shaft.

[0022] Its effect is that a sealing ring is set at the connection between the inner and outer plates, so that the fermentation material in the tank will not enter the interior of the inner plate. At the same time, the interior of the inner plate is connected to the outside through the hollow inside the stirring shaft, so as not to affect the expansion and contraction of the outer plate.

[0023] Preferably, the stirring shaft includes a housing, an upper shaft, and a lower shaft. The interior of the housing is used to fix a rotating motor, while the drive disc is rotatably mounted on the housing. The upper shaft and the lower shaft are respectively fixed to the upper and lower ends of the housing.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are as follows: This invention utilizes an adjustment device to enable the stirring blades to rotate vertically, thereby adjusting the angle between them and the vertical plane. This promotes the growth and metabolism of microorganisms. The rotational speed of the stirring shaft is controlled by the main stirring motor, and the shaft speed and the dynamic adjustment of the stirring blades complement each other. By adjusting the stirring speed and combining it with changes in the length and angle of the stirring blades, the energy consumption of the main stirring motor can be minimized while ensuring the stirring effect.

[0025] The vertical rod can reach the inside of the tank when the stirring blades are extended to their maximum length, so that the sprayed cleaning fluid can better clean the inner wall of the tank. At the same time, the splashed cleaning fluid can also clean the vertical rod itself. When the stirring blades are retracted to their minimum length, the cleaning fluid sprayed by the vertical rod can rinse the side walls around the stirring shaft.

[0026] The two stirring blades on the same layer can extend and retract synchronously, and rotate in opposite directions when adjusting the tilt angle, thus ensuring a balanced stirring force. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the external shape of a raw material fermentation device for veterinary drug production according to the present invention; Figure 2 This is an internal schematic diagram of a raw material fermentation device for veterinary drug production according to the present invention; Figure 3 This is a schematic diagram of the installation structure of the stirring blades in an embodiment of the present invention; Figure 4 This is a schematic diagram of the mounting structure of the driving cam in an embodiment of the present invention; Figure 5 This is a schematic diagram showing the maximum tilt angle of the stirring blades in an embodiment of the present invention; Figure 6 This is a schematic diagram of the drive disk structure in an embodiment of the present invention; Figure 7 This is a schematic diagram of the installation position structure of the fixing tube in an embodiment of the present invention; Figure 8 This is a schematic diagram of the driver structure in an embodiment of the present invention; Figure 9 This is a schematic diagram showing the position of the mounting bracket in an embodiment of the present invention; Figure 10 This is a schematic diagram of the installation structure of the inner tube in an embodiment of the present invention.

[0028] Figure label: 1. Tank body; 11. Main stirring motor; 12. Feed inlet; 2. Stirring shaft; 21. Shell; 22. Upper shaft; 23. Lower shaft; 3. Stirring blades; 31. Inner blade; 32. Outer blade; 321. Elongated hole; 33. Connecting rod; 4. Cross-shaped mounting bracket; 5. Adjusting device; 51. Vertical rod; 511. Spray nozzle; 52. Drive cam; 6. Drive unit; 61. Drive disc; 62. Gear; 63. 64. Drive motor; 65. Arc rack; 66. Drive groove; 67. Clearance groove; 71. Arc groove; 72. Guide sleeve; 73. Support rod; 74. Pin; 8. Driver; 81. Rotary motor; 82. Telescopic rod; 83. Worm gear; 84. Worm wheel; 85. Mounting bracket; 9. Inner tube; 91. Liquid outlet; 92. Liquid inlet pipe; 93. Return spring; 94. Fixing tube; 95. Connecting hole; 10. Protective cover. Detailed Implementation

[0029] The following is combined with Figures 1 to 10 Embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] This embodiment discloses a raw material fermentation device for veterinary drug production, such as... Figure 1 and Figure 2 As shown, the equipment includes a tank 1, with a main stirring motor 11 fixedly mounted on the upper end of the tank 1. A stirring shaft 2 is mounted on the output shaft of the main stirring motor 11, and the stirring shaft 2 is vertically positioned. The tank 1 is cylindrical and vertically positioned, with a feed inlet 12 located on one side of the upper end of the tank 1. The stirring shaft 2 is located inside the tank 1, and its centerline coincides with the centerline of the tank 1. The main stirring motor 11 drives the stirring shaft 2 to rotate horizontally within the tank 1. Multiple stirring blades 3 are mounted on the stirring shaft 2, and these blades can rotate horizontally together with the stirring shaft 2. The multiple stirring blades 3 are arranged in multiple layers along the height direction of the tank 1, in this embodiment, three layers, and are also evenly arranged in the circumferential direction of the stirring shaft 2, with two blades per layer. The stirring blades 3 are used to stir the veterinary drug production raw materials inside the tank 1. The veterinary drug production raw materials ferment in the tank 1 and are called fermented materials. When it is necessary to adjust the stirring speed, this can be achieved by controlling the rotation speed of the main stirring motor 11.

[0031] refer to Figure 2 and Figure 3A cross-shaped mounting bracket 4 is fixedly installed on the stirring shaft 2 at the position corresponding to each layer of stirring blades 3. The cross-shaped mounting bracket 4 is sleeved on the stirring shaft 2, with both ends of the cross-shaped mounting bracket 4 arranged along the stirring shaft 2, and the other two ends perpendicular to the stirring shaft 2 and used to install the stirring blades 3. One end of the stirring blade 3 is rotatably connected to one end of the cross-shaped mounting bracket 4, and the rotation axis of the stirring blade 3 and the cross-shaped mounting bracket 4 are horizontally arranged. The two ends of the cross-shaped mounting bracket 4 are perpendicular to the stirring shaft 2 and are along the rotation axis of the stirring blade 3 and the cross-shaped mounting bracket 4. The extension direction of the stirring blade 3 is parallel to the axis of the stirring blade 3 and the cross-shaped mounting bracket 4. In this embodiment, the stirring blade 3 is a plate-shaped structure. The plate surface of the stirring blade 3 can rotate vertically through the connection with the cross-shaped mounting bracket 4, so that the stirring blade 3 can be tilted with respect to the vertical plane. When two stirring blades 3 located in the same layer rotate vertically, they should rotate in opposite directions and at the same angle to control the tilt angle of each layer of stirring blades 3, thereby adjusting the mixing efficiency by controlling the tilt angle of the stirring blades 3 with respect to the vertical plane.

[0032] refer to Figure 3 , Figure 4 and Figure 5 The stirring shaft 2 is also equipped with an adjustment device 5 for adjusting the tilt angle of the stirring blades 3. This adjustment device 5 includes a vertical rod 51 and a drive cam 52. An elongated hole 321 is formed on the stirring blades 3, with the length direction of the hole 321 perpendicular to the length direction of the stirring blades 3. Connecting rods 33 are fixedly installed on the inner walls at both ends of the elongated hole 321, with the two connecting rods 33 positioned opposite each other. Specifically, one end of the connecting rod 33 is fixed to the corresponding end of the elongated hole 321, and the other end extends to a position connected to the drive cam 52. The drive cam 52 is a cylindrical grooved cam, coaxially fixed to the vertical rod 51. The vertical rod 51 penetrates the stirring blades 3 through the elongated hole 321, and the drive cam 52 is located within the elongated hole 321. The connecting rod 33 is connected to a groove in the peripheral wall of the drive cam 52. This groove has only one highest point and one lowest point along the axial direction of the drive cam 52, and these two points are 180 degrees apart in the circumferential direction of the drive cam 52. Meanwhile, the orientation of the slot at different positions around the drive cam 52 should ensure that the connecting rod 33 does not get stuck during rotation. This typically means the slot should be parallel to a straight line pointing from the center of the drive cam 52 to the slot. This design ensures that the connecting rod 33 can always move smoothly within the slot of the drive cam 52. When the stirring blade 3 rotates, if one connecting rod 33 is at the highest point of the slot in the drive cam 52, the other connecting rod 33 will be at the lowest point, at which point the stirring blade 3 reaches its maximum tilt angle. Conversely, when both connecting rods 33 are at the middle height position of the drive cam 52 and are arranged opposite each other, the stirring blade 3 is at its minimum tilt angle, i.e., horizontal. The maximum and minimum tilt angles refer to the angle between the surface of the stirring blade 3 and the horizontal plane.

[0033] The stirring blade 3 includes an inner blade 31 and an outer blade 32. The inner blade 31 is positioned close to the stirring shaft 2, while the outer blade 32 is connected to the end of the inner blade 31 away from the stirring shaft 2. The inner blade 31 has a hollow structure with an open end for sliding connection to the outer blade 32, allowing the outer blade 32 to slide within the inner blade 31. To prevent liquid from seeping into the hollow structure of the inner blade 31, a sealing ring (not shown in the attached drawings) is provided on the peripheral wall of the inner blade 31 at the connection point with the outer blade 32. This design allows the outer blade 32 to move horizontally relative to the inner blade 31 in the radial direction of the stirring shaft 2, thereby adjusting the length of the stirring blade 3. As the length of the stirring blade 3 increases, its stirring area also increases, thus allowing adjustment of the stirring efficiency for the fermentation material. To address the potential issue of vacuum problems affecting the smooth movement of the outer plate 32 due to the increased internal space caused by the outward movement of the hollow inner plate 31, the stirring shaft 2 is designed as a hollow structure with a closed lower end and an opening in its upper sidewall connecting it to the outside. This allows the hollow portion of the inner plate 31 to connect to the interior of the stirring shaft 2 via the cross-shaped mounting bracket 4, and then to the outside via the stirring shaft 2, thus avoiding any interference with the movement of the outer plate 32. Alternatively, as an alternative, the interior of the stirring shaft 2 can be connected to an air or water supply device, such as a water tank, via a rotary joint, ensuring smooth movement of the outer plate 32. The elongated hole 321 is located at the end of the outer plate 32 furthest from the inner plate 31 to prevent the vertical rod 51 from affecting the length of the outer plate 32 when it retracts to the inner plate 31, and also allows the vertical rod 51 to be closer to the inner wall of the tank 1 under the influence of the outer plate 32.

[0034] refer to Figure 3 , Figure 6 and Figure 7A drive device 6 is installed on the stirring shaft 2, which is used to adjust the length of the stirring blades 3. The drive device 6 includes a drive disc 61, a gear 62, and a drive motor 63. The drive disc 61 is rotatably connected to the stirring shaft 2, and a guide sleeve 71 is fixedly installed on the stirring shaft 2. A support rod 72 is slidably connected inside the guide sleeve 71, and the length direction of the support rod 72 is parallel to the length direction of the stirring blades 3. One end of the support rod 72 is located inside the guide sleeve 71, and the other end is used to rotatably connect to the vertical rod 51. The drive device 6 is usually installed at the upper end of the stirring shaft 2 to ensure that the fermentation material in the tank 1 does not submerge the drive device 6. The drive motor 63 is fixed to the guide sleeve 71. An arc-shaped groove 67 is formed on the upper surface of the drive disc 61, and an arc-shaped rack 64 is provided in the arc-shaped groove 67. The center of the arc formed by the arc-shaped rack 64 is exactly located on the center line of the stirring shaft 2. The output shaft of the drive motor 63 is coaxially fixed with the gear 62, and the gear 62 and the arc-shaped rack 64 mesh with each other. Therefore, when the drive motor 63 starts, it can drive the drive disk 61 to rotate horizontally. Furthermore, the drive disk 61 has two drive grooves 65. One end of each drive groove 65 is close to the center of the drive disk 61, and the other end is close to its edge. A pin 73 is fixedly mounted on the support rod 72, penetrating downwards through the side wall of the guide sleeve 71 and inserting into the drive groove 65. Simultaneously, to ensure smooth sliding of the pin 73, a long, narrow clearance groove 66 is formed on the side wall of the guide sleeve 71 facing the drive disk 61, running along the length of the guide sleeve 71. The pins 73 on the two support rods 72 are respectively located in their corresponding drive grooves 65, and the two drive grooves 65 are identical in shape. When the drive motor 63 drives the gear 62 to rotate, the gear 62 rolls on the arc-shaped rack 64, thereby causing the drive disk 61 to rotate relative to the stirring shaft 2. At this time, the drive groove 65 will drive the two support rods 72 to move along the guide sleeve 71 through the pin 73, thereby causing the vertical rod 51 to move along the radial direction of the tank body 1. The stirring blade 3 will extend and retract with the horizontal movement of the vertical rod 51, thereby achieving the purpose of adjusting the length.

[0035] refer to Figure 7 The stirring shaft 2 includes a housing 21, an upper shaft 22, and a lower shaft 23 arranged along the same axis. Two guide sleeves 71 are fixed on the outer peripheral wall of the housing 21. The upper shaft 22 and the lower shaft 23 are fixedly connected to the upper and lower ends of the housing 21 respectively through flanges. In this way, during manufacturing, the guide sleeves 71 and the drive disc 61 can be installed on the housing 21 first, and then the housing 21 can be connected to the lower shaft 23 and the upper shaft 22, which makes the installation more convenient.

[0036] refer to Figure 7 , Figure 8 and Figure 9To drive the vertical rod 51 to rotate around its own axis, and thereby adjust the tilt angle of the stirring blade 3 via the drive cam 52, a driver 8 is connected to the vertical rod 51. The driver 8 can be a separate servo motor, with its output shaft coaxially fixed to the vertical rod 51, thus driving the vertical rod 51 to rotate. In this embodiment, the driver 8 includes a rotary motor 81, a telescopic rod 82, a worm gear 83, and a worm wheel 84. The telescopic rod 82 is a torque-transmitting telescopic rod 82, meaning that the two sections of the telescopic rod 82 will not rotate relative to each other, and can have a polygonal structure. The telescopic rod 82 is rotatably connected inside the guide sleeve 71, while the worm wheel 84 is coaxially fixed to the vertical rod 51. The worm gear 83 is coaxially set with the output shaft of the rotary motor 81 via the telescopic rod 82. The rotary motor 81 can be a servo motor or a stepper motor. A mounting bracket 85 is fixedly provided at one end of the support rod 72 that is rotatably connected to the vertical rod 51, for rotatably connecting the worm gear 83 to the mounting bracket 85. When the support rod 72 moves along the guide sleeve 71, the length of the telescopic rod 82 changes accordingly, thereby driving the worm 83 to move with the worm wheel 84, ensuring that the worm 83 and the worm wheel 84 always remain in a meshed state. The rotating motor 81 drives the telescopic rod 82 to rotate, which in turn drives the worm wheel 84 to rotate through the worm 83 on the telescopic rod 82. Since the drive device 6 restricts the position of the worm 83 through the mounting bracket 85, the worm 83 will not move arbitrarily in the radial direction of the tank 1. In addition, the self-locking characteristics of the worm wheel 84 and the worm 83 ensure that the stirring blade 3 can stably maintain the angle after angle adjustment. The rotating motor 81 is located inside the aforementioned housing 21.

[0037] refer to Figure 2 and Figure 10Multiple spray holes 511 are provided on the side wall of the vertical rod 51. An inner tube 9 is installed inside the vertical rod 51, with its lower end sealed and slidably connected within the vertical rod 51, allowing it to slide vertically. To prevent circumferential rotation of the inner tube 9 within the vertical rod 51, its cross-section can be designed as a polygon, such as a regular quadrilateral. Liquid outlet holes 91 corresponding to the spray holes 511 are provided on the side wall of the inner tube 9. An inlet pipe 92 is connected to the upper end of the vertical rod 51, used to introduce cleaning fluid into the vertical rod 51. When the spray holes 511 are connected to the liquid outlet holes 91, the cleaning fluid can be sprayed out from the spray holes 511. When the stirring blades 3 are in their longest position, the vertical rod 51 is close to the inner wall of the tank 1, and the sprayed cleaning fluid is closer to the inner wall of the tank 1, thus improving the cleaning effect on the tank 1. Simultaneously, the direction of the multiple spray holes 511 can be set to be upward or downward inclined. In this way, when the vertical rod 51 rotates, the cleaning fluid sprayed from the nozzle 511 can cover a wider area. Furthermore, because the vertical rod 51 is positioned relatively close to the interior of the tank 1, the cleaning fluid sprayed onto the inner wall of the tank 1 will splash back onto the side wall of the vertical rod 51 after impact, thus cleaning the outer wall of the vertical rod 51 as well, reducing cleaning dead zones. When the stirring blade 3 is in its shortest position, the vertical rod 51 can also rinse the outer wall of the stirring shaft 2.

[0038] To prevent fermentation materials from entering the vertical rod 51 inside the tank 1 during fermentation, a return spring 93 is installed below the vertical rod 51. One end of the return spring 93 abuts against the inner tube 9, and the other end abuts against the inner bottom surface of the vertical rod 51. The force of the return spring 93 drives the inner tube 9 to move upward, so that the liquid outlet 91 is misaligned with the spray hole 511, thereby blocking the spray hole 511. The upper end of the vertical rod 51 is sealed by a threaded plug, so even if the inner tube 9 moves to its highest position under the action of the return spring 93, its upper end is still lower than the connecting hole 95 opened at the upper end of the vertical rod 51. This connecting hole 95 communicates with the cavity provided inside the support rod 72. A fixing tube 94 is fixedly installed inside the guide sleeve 71, and the fixing tube 94 is connected to the liquid inlet pipe 92 through a rotary joint. One end of the fixing tube 94 is inserted into the guide sleeve 71 and is slidably sealed to the support rod 72. When pressurized cleaning fluid is injected into the inlet pipe 92, the inner tube 9 will move downward under pressure, thereby squeezing the return spring 93. At this time, the outlet hole 91 on the inner tube 9 connects with the spray hole 511, allowing the cleaning fluid to flow out. When the injection of cleaning fluid stops, the return spring 93 will automatically move the inner tube 9 upward, causing the outlet hole 91 and the spray hole 511 to be misaligned again, and the inner tube 9 will re-seal the spray hole 511 to prevent fermentation raw materials from entering the inner tube 9.

[0039] The working process of this embodiment is as follows: During fermentation, the drive motor 63, via gear 62, first drives the drive disc 61 to rotate, causing the support rod 72 to move radially along the tank 1, thereby shortening the length of the stirring blades 3 to their shortest state. The main stirring motor 11 can drive the stirring blades 3 to rotate via the stirring shaft 2, and the rotation speed of the stirring blades 3 can be controlled by controlling the speed of the main stirring motor 11. When low-speed stirring is required and high mixing efficiency is demanded, the vertical rod 51 can be rotated by the driver 8. The drive cam 52 on the vertical rod 51 can adjust the tilt angle of the stirring blades 3 with the horizontal plane, increasing the tilt angle so that the stirring blades 3 can still maintain good mixing efficiency at low speeds. At the same time, the length of the stirring blades 3 can be increased by rotating the drive disc 61 to obtain a larger stirring area and further improve mixing efficiency. Conversely, when a higher stirring speed is required, the resistance of the stirring blades 3 can be reduced by shortening the length of the stirring blades 3 and decreasing the angle between the stirring blades 3 and the horizontal plane, to adapt to situations where the fermentation raw materials have high viscosity.

[0040] During the cleaning of tank 1, drive motor 63 first drives drive disc 61 to rotate via gear 62, causing support rod 72 to move radially along tank 1 to a position close to the inner wall of tank 1. Cleaning fluid is introduced into inlet pipe 92 and enters vertical rod 51. The pressurized cleaning fluid pushes inner tube 9 downward, aligning the outlet hole 91 on inner tube 9 with the spray hole 511 on vertical rod 51, allowing cleaning fluid to be sprayed out from the spray hole 511. At this time, drive motor 8 rotates vertical rod 51, enabling multiple spray holes 511 in different directions to more comprehensively clean the inner wall of tank 1. Simultaneously, in conjunction with the rotation of main stirring motor 11, the circumferential inner wall of tank 1 can be cleaned. Conversely, when vertical rod 51 moves closer to stirring shaft 2, the cleaning fluid sprayed from spray hole 511 can clean stirring shaft 2.

[0041] In this embodiment, reference Figure 2 A protective cover 10 is also provided above the drive device 6. The protective cover 10 is conical, with its larger end facing the drive device 6. The upper end of the protective cover 10 can be fixed to the inner wall of the top of the tank 1. The protective cover 10 is spaced apart from the side wall of the tank 1. The function of the protective cover 10 is to prevent raw materials from falling onto the drive device 6 when they are added to the tank 1.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fermentation device for raw materials used in veterinary drug production, comprising a tank (1) and a vertical stirring shaft (2) disposed at the center of the tank (1), wherein a main stirring motor (11) for controlling the rotational speed of the stirring shaft (2) is connected to the upper end of the stirring shaft (2), characterized in that, Also includes: The stirring blade (3) includes an inner plate (31) and an outer plate (32). Both the inner plate (31) and the outer plate (32) are plate-shaped. One end of the inner plate (31) is rotatably connected to the stirring shaft (2), and the other end is slidably connected to the outer plate (32). The axis of rotational connection between the inner plate (31) and the stirring shaft (2) is parallel to the length direction of the stirring blade (3). The driving device (6) is used to drive the outer plate (32) to move along the length direction of the stirring blade (3) in order to adjust the length of the stirring blade (3); Adjustment device (5) is used to drive the stirring blade (3) to rotate vertically in order to adjust the angle between the stirring blade (3) and the vertical plane.

2. The fermentation equipment for raw materials in veterinary drug production according to claim 1, characterized in that, The adjustment device (5) includes a vertical rod (51) and a columnar drive cam (52). The drive cam (52) is coaxially fixed on the vertical rod (51). An elongated hole (321) perpendicular to the length of the stirring blade (3) is opened on the outer side plate (32). The vertical rod (51) passes through the elongated hole (321) and the drive cam (52) is located in the elongated hole (321). Connecting rods (33) are fixed at both ends of the elongated hole (321). The ends of the connecting rods (33) are fitted into the grooves of the drive cam (52). The vertical rod (51) drives the drive cam (52) to rotate. Through the cooperation between the connecting rods (33) and the drive cam (52), the stirring blade (3) changes angle relative to the vertical plane. A driver (8) for driving the vertical rod (51) to rotate is connected to the vertical rod (51).

3. The fermentation equipment for raw materials in veterinary drug production according to claim 2, characterized in that, The vertical rod (51) is a hollow structure with multiple spray holes (511) on its side wall, which are connected to the interior of the vertical rod (51). The upper end of the vertical rod (51) is connected to an inlet pipe (92) for injecting cleaning fluid into the vertical rod (51). During the stirring process, the vertical rod (51) rotates on its own axis while revolving with the stirring shaft (2), and sprays cleaning fluid into the tank (1) through the spray holes (511). When the stirring blade (3) extends to its maximum length, the cleaning fluid sprayed by the vertical rod (51) cleans the inner wall of the tank (1) and the vertical rod (51) itself. When the stirring blade (3) retracts to its minimum length, the cleaning fluid sprayed by the vertical rod (51) cleans the stirring shaft (2).

4. The fermentation equipment for raw materials in veterinary drug production according to claim 3, characterized in that, The vertical rod (51) is provided with an inner tube (9). The side wall of the inner tube (9) is provided with liquid outlet holes (91) that correspond one-to-one with the spray holes (511). The inner tube (9) is slidably sealed inside the vertical rod (51). A return spring (93) is connected to the inner tube (9) to drive the inner tube (9) to slide along the vertical rod (51) and to make the liquid outlet holes (91) misaligned with the spray holes (511). When pressurized cleaning fluid enters the inlet pipe (92), the pressure of the cleaning fluid overcomes the elastic force of the return spring (93) and pushes the inner tube (9) to slide along the vertical rod (51) until the liquid outlet holes (91) correspond one-to-one with the spray holes (511), so that the cleaning fluid is sprayed out.

5. The fermentation equipment for raw materials in veterinary drug production according to claim 4, characterized in that, A guide sleeve (71) is fixedly installed on the stirring shaft (2), and a support rod (72) is slidably connected inside the guide sleeve (71). The length directions of the guide sleeve (71) and the support rod (72) are parallel to the length direction of the stirring blade (3). The upper end of the vertical rod (51) is rotatably connected to the end of the support rod (72) away from the guide sleeve (71). A fixing tube (94) is fixedly installed inside the guide sleeve (71). The fixing tube (94) is connected to the liquid inlet pipe (92) through a rotary joint, and the fixing tube (94) is inserted into the support rod (72) and slidably sealed to it. The interior of the vertical rod (51) is connected to the internal cavity of the support rod (72) through a connecting hole (95).

6. The fermentation equipment for raw materials in veterinary drug production according to claim 5, characterized in that, The driving device (6) includes a driving disk (61), a gear (62) and a driving motor (63). The driving disk (61) is rotatably connected to the stirring shaft (2). The driving motor (63) is fixed on the guide sleeve (71). The gear (62) is coaxially fixed on the output shaft of the driving motor (63) and is used to drive the driving disk (61) to rotate. The driving disk (61) has a driving groove (65). The support rod (72) is fixedly provided with a pin (73) inserted into the driving groove (65). When the pin (73) moves in the driving groove (65), the support rod (72) moves linearly along the length direction of the guide sleeve (71).

7. The fermentation equipment for raw materials in veterinary drug production according to claim 6, characterized in that, The driver (8) includes a rotating motor (81), a telescopic rod (82), a worm (83) and a worm wheel (84). The worm (83) is rotatably mounted on a support rod (72). The rotating motor (81) is fixed on a stirring shaft (2). The output shaft of the rotating motor (81) is rotatably connected to the worm (83) through the telescopic rod (82). The worm wheel (84) is coaxially fixed on a vertical rod (51).

8. A fermentation device for raw materials in veterinary drug production according to any one of claims 2-7, characterized in that, The stirring blades (3) are arranged in multiple layers along the length of the stirring shaft (2). Two blades are evenly arranged in each layer around the stirring shaft (2), and the lengths of the two stirring blades (3) in each layer are simultaneously extended or shortened. When the tilt angle between the stirring blades (3) and the vertical plane is adjusted, the rotation directions of the two stirring blades (3) in the same layer are opposite. The same vertical rod (51) passes through multiple stirring blades (3) from top to bottom.

9. The fermentation equipment for raw materials in veterinary drug production according to claim 1, characterized in that, A sealing ring is provided at one end of the inner side plate (31) connected to the outer side plate (32), and the end of the inner side plate (31) away from the outer side plate (32) is connected to the outside through the hollow inside the stirring shaft (2).

10. The fermentation equipment for raw materials in veterinary drug production according to claim 7, characterized in that, The stirring shaft (2) includes a housing (21), an upper shaft (22) and a lower shaft (23). The interior of the housing (21) is used to fix the rotating motor (81), while the drive disk (61) is rotatably mounted on the housing (21). The upper shaft (22) and the lower shaft (23) are respectively fixed to the upper and lower ends of the housing (21).

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