A multi-stage series microbial culture device
By using a composite threaded seat and an electromagnetic adsorption plate to connect the culture chamber and the delivery pipeline in a multi-stage series microbial culture device, the problem of inconvenient pipeline connection in the prior art is solved, the flexibility and stability of the device are improved, and the maintenance cost is reduced.
Patent Information
- Application Number
- CN202521978498.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-15
AI Technical Summary
In existing multi-stage series microbial culture devices, the lack of flexibility caused by fixed pipeline connections increases the difficulty of operation and maintenance costs, making it difficult to achieve convenient pipeline and culture chamber connection while maintaining system sealing and stability.
The culture chamber and delivery pipeline are connected by a detachable composite threaded seat and an electromagnetic adsorption plate. The installation deviation is compensated by a support guide plate and an elastic guide column. Combined with a gradient temperature control system, it can achieve quick disassembly and assembly and a stable connection.
It improves the operational flexibility and connection stability of the device, reduces maintenance costs, and ensures the sealing and stability of the microbial culture process.
Smart Images
Figure CN224678036U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of microbial culture technology, and in particular to a multi-stage series microbial culture device. Background Technology
[0002] In the field of microbial engineering, microbial culture devices are the core equipment for achieving cell proliferation and metabolite synthesis, and are widely used in biomedicine, food fermentation, environmental remediation, and other fields. Multi-stage series microbial culture devices connect multiple culture units in sequence to simulate different stages of microbial growth (such as seed culture, scale-up culture, and product synthesis), enabling continuous production from small-scale inoculum to large-scale culture. This is an important piece of equipment for improving culture efficiency and product yield.
[0003] In the field of microbial engineering, multi-stage tandem microbial culture devices utilize multiple culture chambers connected sequentially to achieve stepwise cell amplification and product synthesis. In existing technologies, the culture chambers are typically connected by fixed pipes to ensure system sealing and sterility. However, when maintenance, pipe replacement, or process adjustments under laboratory conditions are required, the fixed pipe structure is difficult to disassemble and reassemble quickly, resulting in insufficient flexibility and increased operational difficulty and maintenance costs. Therefore, improving the adjustability and convenience of pipe-to-culture chamber connections while maintaining system sealing and stability remains a pressing technical challenge. Utility Model Content
[0004] Therefore, the purpose of this utility model is to propose a multi-stage series microbial culture device to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.
[0005] To achieve the above objectives, one embodiment of this utility model provides a multi-stage series-connected microbial culture device, including a first-stage anaerobic culture chamber, a second-stage anaerobic culture chamber, and a third-stage anaerobic culture chamber for microbial culture. The first-stage, second-stage, and third-stage anaerobic culture chambers are connected in series to form an anaerobic culture chamber system. Each of the first-stage, second-stage, and third-stage anaerobic culture chambers is equipped with a gradient temperature control system. This gradient temperature control system uses a PID temperature control module, capable of independently regulating the temperature of each culture chamber. The temperature of the first-stage culture chamber is controlled at 30-40℃, the second-stage culture chamber at 40-50℃, and the third-stage culture chamber at 50-60℃. The system adopts an intelligent PID control algorithm, achieving a temperature control accuracy of ±0.5℃, enabling rapid heating and cooling as well as constant temperature maintenance. The top of the first-stage anaerobic culture chamber is equipped with a material feeding hopper. The bottom of the first-stage anaerobic culture chamber is equipped with a first conveying pipe fixedly installed with the second-stage anaerobic culture chamber. The bottom of the second-stage anaerobic culture chamber is fixedly installed with a second conveying pipe fixedly installed with the third-stage anaerobic culture chamber. Both ends of the first and second conveying pipes are equipped with composite threaded seats that are threadedly connected to the first, second, and third-stage anaerobic culture chambers. The composite threaded seats have internal support guides for guidance and are internally fixed with electromagnetic adsorption plates for magnetic attraction and fixation.
[0006] By installing a detachable composite threaded seat between the culture chambers, and combining it with a guiding structure to limit and seal the pipeline, the connection between the delivery pipeline and the culture chamber is made more stable and reliable. This facilitates quick assembly and disassembly during maintenance, replacement, or process adjustments, thereby improving the operational flexibility of the unit. A support guide plate is installed inside the composite threaded seat. Its elastic deformation guides and buffers the connection between the pipeline and the threaded seat, compensating for minor deviations during installation, improving the sealing and stability of the connection, and extending the service life of the pipeline interface.
[0007] Preferably, the surfaces of the first-stage anaerobic culture chamber, the second-stage anaerobic culture chamber, and the third-stage anaerobic culture chamber are provided with support frames for supporting and fixing them, and the bottom and top of the first-stage anaerobic culture chamber, the second-stage anaerobic culture chamber, and the third-stage anaerobic culture chamber are all provided with stainless iron ring plates for attracting electromagnetic adsorption plates.
[0008] The above technical solution is adopted: the support frame (welded angle steel) on the surface of each culture chamber (304 stainless steel) is fixed to the operating table by expansion bolts to ensure that the culture chamber is placed vertically and to avoid uneven material deposition inside. The stainless iron ring plates (1Cr18Ni9Ti material) at the top and bottom of the culture chamber correspond to the magnetic pole plates of the electromagnetic adsorption plate. When the electromagnetic coil is energized, the magnetic pole plates are magnetized to generate magnetic force, which attracts the stainless iron ring plates, enhances the connection and sealing between the composite thread seat and the culture chamber, and at the same time helps to maintain the anaerobic environment inside the chamber.
[0009] Preferably, either of the above-mentioned solutions has a ring platform at both ends of the first and second conveying pipes to limit their movement, and the ring platform of the first and second conveying pipes is located inside the composite threaded seat.
[0010] The above technical solution is adopted: the ring platform (one-piece molded) at both ends of the conveying pipe (food-grade silicone material) is engaged inside the composite threaded seat to form an axial limit, preventing the pipe from axially moving due to pressure during material conveying. The surface of the ring platform is in contact with the nitrile rubber sealing ring on the inner wall of the composite threaded seat, and radial sealing is achieved by the pressure of the ring platform to avoid material leakage.
[0011] Preferably, in any of the above embodiments, the composite threaded seat is fitted onto the surface of the first conveying pipe and the second conveying pipe, one end of the composite threaded seat is provided with a handle for rotating it, and one end of the composite threaded seat is provided with a slot with an inner diameter smaller than the diameter of the ring and equal to the diameter of the first conveying pipe and the second conveying pipe.
[0012] The above technical solution is adopted: the composite threaded seat (brass material, chrome plated) is fitted onto the surface of the conveying pipe, and the handle at one end (PVC material, with anti-slip texture) is easy to rotate manually. Its inner wall thread engages with the interface thread of the culture chamber to achieve a rigid connection between the pipe and the culture chamber. The slot at one end (inner diameter equal to the pipe diameter) ensures that there is no radial offset when the pipe passes through, and the inner diameter of the slot is smaller than the diameter of the ring platform, which cooperates with the ring platform to form a double limit to prevent the pipe from coming off the threaded seat.
[0013] Preferably, in any of the above embodiments, the support guide plate includes a connecting plate for support, an elastic guide post made of elastic material, and a fixed plate for connection. The connecting plate is rotatably connected to the interior of the composite threaded seat. A plurality of circumferentially distributed elastic guide posts are fixedly installed at one end of the connecting plate, and a fixed plate that is fixedly installed on the ring platform is fixedly installed at one end of the elastic guide post.
[0014] The above technical solution is adopted as follows: the connecting disc (made of polytetrafluoroethylene) is rotatably connected to the composite threaded seat through a bearing. When it rotates with the threaded seat, it does not affect the position of the pipeline. The elastic guide posts (made of silicone rubber) distributed around one end have elastic deformation capability, which can compensate for the installation coaxiality error between the pipeline and the threaded seat. The fixing disc (made of ABS) is connected to the ring bolt. The elastic force of the elastic guide posts keeps the pipeline always aligned, avoiding the sealing failure caused by the pipeline being misaligned during the threaded connection.
[0015] Preferably, in any of the above embodiments, the electromagnetic adsorption plate includes an electromagnetic coil that generates a magnetic field by an electric current and a magnetized magnetic pole plate. The electromagnetic coil is fixedly installed inside the composite threaded seat, and a magnetic pole plate located inside the composite threaded seat is provided on one side of the electromagnetic coil. The electromagnetic coil is electrically connected to a control circuit and a battery module for switching and controlling its functions.
[0016] The above technical solution is adopted: the electromagnetic coil (wound with enameled wire) is fixed inside the composite threaded seat and is powered by the control circuit (STM32 microcontroller) and the battery module (lithium battery). When energized, the coil generates a magnetic field to magnetize the magnetic pole plate (made of low carbon steel). The magnetic pole plate attracts the stainless iron ring plate of the culture chamber. The magnetic force enhances the pre-tightening force of the threaded connection. The control circuit can adjust the coil current according to the pressure of the material in the pipeline (feedback from the pressure sensor). The higher the pressure, the greater the current and the stronger the magnetic attraction, preventing the connection from loosening under high pressure.
[0017] Preferably, in any of the above embodiments, the control circuit is electrically connected to an indicator light that indicates the operation of the electromagnetic coil, and the indicator light is fixedly installed inside the composite threaded seat.
[0018] The above technical solution is adopted: the indicator light (LED beads, red / green light) is electrically connected to the control circuit. When the electromagnetic coil is energized, the green light is on, and when the power is cut off or there is a fault, the red light flashes, which provides intuitive feedback on the magnetic attraction status. The indicator light is embedded in the surface of the composite thread seat, which makes it easy for operators to monitor the connection stability in real time and deal with abnormalities in a timely manner.
[0019] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:
[0020] 1. A delivery pipeline is installed between the multi-stage series microbial culture chambers to connect them. Composite threaded seats are installed at both ends of the delivery pipeline to connect and fix it to the microbial culture chamber. At the same time, an electromagnetic adsorption plate is installed inside the composite threaded seat to magnetically attract and fix it to the microbial culture chamber, which enhances the stability of the delivery pipeline connection. The working state of the electromagnetic adsorption plate can be adjusted according to the different pressure changes inside the delivery pipeline caused by the delivery requirements of different culture nodes. The connection method between each pipeline and the corresponding culture chamber can be adjusted, and the fixation degree and pressure bearing capacity of the delivery pipeline can be adjusted, thereby improving the stability of the internal structural connection of the microbial culture device during use.
[0021] 2. A support guide plate is installed between the conveying pipeline and the composite threaded seat to seal the gap. The elastic deformation inside the support guide plate provides stable guidance for the connection between the conveying pipeline and the composite threaded seat, giving the conveying pipeline and the composite threaded seat a certain installation margin. This is beneficial to the stability of the conveying pipeline installation and ensures the stability and sealing of the connection between the conveying pipeline and the composite threaded seat.
[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0024] Figure 1 This is a schematic diagram of the structure according to an embodiment of the present utility model;
[0025] Figure 2 This is a partial structural schematic diagram according to an embodiment of the present utility model;
[0026] Figure 3 This is a schematic diagram of the composite threaded seat according to an embodiment of the present utility model;
[0027] Figure 4 This is a cross-sectional structural diagram of the composite threaded seat according to an embodiment of the present invention;
[0028] Among them: 1-first-stage anaerobic culture chamber, 2-second-stage anaerobic culture chamber, 3-third-stage anaerobic culture chamber, 4-feed hopper, 5-first conveying pipe, 6-second conveying pipe, 7-composite threaded seat, 8-support guide plate, 81-connecting plate, 82-elastic guide column, 83-fixed plate, 9-electromagnetic adsorption plate, 91-electromagnetic coil, 92-magnetic pole plate, 10-ring platform, 11-indicator light. Detailed Implementation
[0029] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.
[0030] like Figure 1-4 As shown in the figure, a multi-stage series-connected microbial culture device of this utility model includes a first-stage anaerobic culture chamber 1, a second-stage anaerobic culture chamber 2, and a third-stage anaerobic culture chamber 3 for microbial culture. The first-stage anaerobic culture chamber 1, the second-stage anaerobic culture chamber 2, and the third-stage anaerobic culture chamber 3 are connected in series to form an anaerobic culture chamber system. Each of the first-stage anaerobic culture chamber 1, the second-stage anaerobic culture chamber 2, and the third-stage anaerobic culture chamber 3 is equipped with a gradient temperature control system. The gradient temperature control system adopts a PID temperature control module, which can independently regulate the temperature of each culture chamber. The temperature of the first-stage culture chamber is controlled at 30-40℃, the temperature of the second-stage culture chamber is controlled at 40-50℃, and the temperature of the third-stage culture chamber is controlled at 50-60℃. The gradient temperature control system adopts an intelligent PID control module. The ID control algorithm achieves a temperature control accuracy of ±0.5℃, enabling rapid heating and cooling as well as constant temperature maintenance. The top of the first-stage anaerobic culture chamber 1 is equipped with a feeding hopper 4 for introducing materials. The bottom of the first-stage anaerobic culture chamber 1 is equipped with a first conveying pipe 5 that is fixedly installed with the second-stage anaerobic culture chamber 2. The bottom of the second-stage anaerobic culture chamber 2 is fixedly installed with a second conveying pipe 6 that is fixedly installed with the third-stage anaerobic culture chamber 3. Both ends of the first conveying pipe 5 and the second conveying pipe 6 are equipped with composite threaded seats 7 that are threadedly connected to the first-stage anaerobic culture chamber 1, the second-stage anaerobic culture chamber 2, and the third-stage anaerobic culture chamber 3. The interior of the composite threaded seat 7 is equipped with a support guide plate 8 for guiding the materials. The interior of the composite threaded seat 7 is fixedly installed with an electromagnetic adsorption plate 9 for magnetic attraction and fixation.
[0031] Preferably, the surfaces of the first-stage anaerobic culture chamber 1, the second-stage anaerobic culture chamber 2, and the third-stage anaerobic culture chamber 3 are provided with support frames for supporting and fixing them, and the bottom and top of the first-stage anaerobic culture chamber 1, the second-stage anaerobic culture chamber 2, and the third-stage anaerobic culture chamber 3 are all provided with stainless iron ring plates for attracting electromagnetic adsorption plates 9.
[0032] The above technical solution is adopted: the support frame (welded angle steel) on the surface of each culture chamber (304 stainless steel) is fixed to the operating table by expansion bolts to ensure that the culture chamber is placed vertically and to avoid uneven material deposition inside. The stainless iron ring plates (1Cr18Ni9Ti material) at the top and bottom of the culture chamber correspond to the magnetic pole plates 92 of the electromagnetic adsorption plate 9. When the electromagnetic coil 91 is energized, the magnetic pole plates are magnetized to generate magnetic force, which attracts the stainless iron ring plates, enhances the connection and sealing between the composite thread seat 7 and the culture chamber, and at the same time helps to maintain the anaerobic environment inside the chamber.
[0033] Preferably, either of the above-mentioned solutions has annular platforms 10 at both ends of the first conveying pipe 5 and the second conveying pipe 6 to limit their movement, and the annular platforms 10 of the first conveying pipe 5 and the second conveying pipe 6 are located inside the composite threaded seat 7.
[0034] The above technical solution is adopted: the ring platform 10 (one-piece molded) at both ends of the conveying pipe (food-grade silicone material) is engaged inside the composite threaded seat 7 to form an axial limit, preventing the pipe from axially moving due to pressure during material conveying. The surface of the ring platform is in contact with the nitrile rubber sealing ring on the inner wall of the composite threaded seat, and radial sealing is achieved by the ring platform being pressurized to avoid material leakage.
[0035] Preferably, in any of the above schemes, the composite threaded seat 7 is fitted onto the surface of the first conveying pipe 5 and the second conveying pipe 6. One end of the composite threaded seat 7 is provided with a handle for rotating it. One end of the composite threaded seat 7 is provided with a slot with an inner diameter smaller than the diameter of the ring platform 10 and equal to the diameter of the first conveying pipe 5 and the second conveying pipe 6.
[0036] The above technical solution is adopted: the composite threaded seat 7 (brass material, chrome plated) is fitted onto the surface of the conveying pipe, and the handle at one end (PVC material, with anti-slip texture) is easy to rotate manually. Its inner wall thread engages with the interface thread of the culture chamber to achieve a rigid connection between the pipe and the culture chamber. The slot at one end (inner diameter equal to the pipe diameter) ensures that there is no radial offset when the pipe passes through, and the inner diameter of the slot is smaller than the diameter of the ring platform 10, which cooperates with the ring platform to form a double limit to prevent the pipe from coming off the threaded seat.
[0037] Preferably, in any of the above embodiments, the support guide plate 8 includes a connecting plate 81 for support, an elastic guide post 82 made of elastic material, and a fixed plate 83 for connection. The connecting plate 81 is rotatably connected to the interior of the composite threaded seat 7. A plurality of circumferentially distributed elastic guide posts 82 are fixedly installed at one end of the connecting plate 81, and a fixed plate 83 fixedly installed at one end of the elastic guide post 82 and the ring platform 10.
[0038] The above technical solution is adopted as follows: the connecting plate 81 (made of polytetrafluoroethylene) is rotatably connected to the composite threaded seat 7 through the bearing. When it rotates with the threaded seat, it does not affect the position of the pipeline. The elastic guide post 82 (made of silicone rubber) distributed circumferentially at one end has elastic deformation capability, which can compensate for the installation coaxiality error between the pipeline and the threaded seat. The fixing plate 83 (made of ABS) is bolted to the ring platform 10. The elastic force of the elastic guide post keeps the pipeline always aligned, avoiding the sealing failure caused by the pipeline being misaligned during the threaded connection.
[0039] Preferably, in any of the above embodiments, the electromagnetic adsorption plate 9 includes an electromagnetic coil 91 that generates a magnetic field by an electric current and a magnetic pole plate 92 for magnetization. The electromagnetic coil 91 is fixedly installed inside the composite threaded seat 7. A magnetic pole plate 92 located inside the composite threaded seat 7 is provided on one side of the electromagnetic coil 91. The electromagnetic coil 91 is electrically connected to a control circuit and a battery module for switching and controlling its functions.
[0040] The above technical solution is adopted: the electromagnetic coil 91 (wound with enameled wire) is fixed inside the composite threaded seat 7 and is powered by the control circuit (STM32 microcontroller) and the battery module (lithium battery). When energized, the coil generates a magnetic field to magnetize the magnetic pole plate 92 (made of low carbon steel). The magnetic pole plate attracts the stainless iron ring plate of the culture chamber. The magnetic force enhances the pre-tightening force of the threaded connection. The control circuit can adjust the coil current according to the pressure of the material in the pipeline (feedback from the pressure sensor). The higher the pressure, the greater the current and the stronger the magnetic attraction, preventing the connection from loosening under high pressure.
[0041] Preferably, in any of the above schemes, the control circuit is electrically connected to an indicator light 11 that indicates the operation of the electromagnetic coil 91, and the indicator light 11 is fixedly installed inside the composite threaded seat 7.
[0042] The above technical solution is adopted: the indicator light 11 (LED lamp bead, red light / green light) is electrically connected to the control circuit. When the electromagnetic coil 91 is powered on, the green light is lit. When the power is cut off or there is a fault, the red light flashes, which intuitively reflects the magnetic attraction status. The indicator light 11 is embedded in the surface of the composite thread seat 7, which makes it easy for the operator to monitor the connection stability in real time and deal with abnormalities in a timely manner.
[0043] The working principle of this multi-stage series microbial culture device is as follows:
[0044] The material is fed into the first-stage anaerobic culture chamber 1 through the feed hopper 4. The gradient temperature control system stabilizes the temperature at 30-40℃ for anaerobic culture using a PID algorithm. After culture, the material is transported to the second-stage anaerobic culture chamber 2 through the first conveying pipe 5. At this time, the rings 10 at both ends of the first conveying pipe 5 engage with the composite threaded seat 7 to form a limit. The composite threaded seat 7 achieves threaded connection with the first-stage anaerobic culture chamber 1 and the second-stage anaerobic culture chamber 2 by rotating the handle. The elastic guide post 82 of the supporting guide plate 8 compensates for installation deviation through elastic deformation, so that the connecting plate 81 and the fixed plate 83 guide each other to ensure the alignment of the pipe. At the same time, the control circuit of the electromagnetic adsorption plate 9 activates the electromagnetic coil 91, and the magnetic pole plate After being magnetized, the material attracts the stainless steel ring plate of the culture chamber, enhancing the connection seal. Indicator light 11 illuminates to indicate the magnetic attraction status. After the material continues to be cultured at 40-50℃ in the second-stage anaerobic culture chamber 2, it is transported to the third-stage anaerobic culture chamber 3 via the second conveying pipe 6. The connection between the second conveying pipe 6 and the third-stage anaerobic culture chamber 3 is achieved through the same composite threaded seat 7, support guide plate 8, and electromagnetic adsorption plate 9, ensuring no leakage during high-pressure transport. Finally, the material completes its cultivation in the 50-60℃ environment of the third-stage anaerobic culture chamber 3. The support frame of each culture chamber provides stable support. The entire process achieves multi-stage continuous cultivation of microorganisms through the linkage of temperature gradient control and pipeline connection structure.
[0045] Compared with the prior art, the present invention has the following advantages:
[0046] 1. A delivery pipeline is installed between the multi-stage series microbial culture chambers to connect them. A composite threaded seat 7 is installed at both ends of the delivery pipeline to connect and fix it to the microbial culture chamber. At the same time, an electromagnetic adsorption plate 9 is installed inside the composite threaded seat 7 to magnetically attract and fix it to the microbial culture chamber, which enhances the stability of the delivery pipeline connection. The working state of the electromagnetic adsorption plate 9 can be adjusted according to the different pressure changes inside the delivery pipeline caused by the delivery requirements of different culture nodes. The connection method between each pipeline and the corresponding culture chamber can be adjusted, and the fixation degree and pressure bearing capacity of the delivery pipeline can be adjusted, thereby improving the stability of the internal structural connection during the use of the microbial culture device.
[0047] 2. A support guide plate 8 is installed between the conveying pipeline and the composite threaded seat 7 to seal the gap between them. The elastic deformation inside the support guide plate 8 provides stable guidance for the connection between the conveying pipeline and the composite threaded seat 7, so that the conveying pipeline and the composite threaded seat 7 have a certain installation margin, which is conducive to the stability of the installation of the conveying pipeline and ensures the stability and sealing of the connection between the conveying pipeline and the composite threaded seat 7.
Claims
1. A multi-stage series microbial culture device, comprising a first-stage anaerobic culture chamber (1), a second-stage anaerobic culture chamber (2), and a third-stage anaerobic culture chamber (3) for microbial culture, wherein a feed hopper (4) for introducing materials is provided at the top of the first-stage anaerobic culture chamber (1), characterized in that: The bottom of the first-stage anaerobic culture chamber (1) is provided with a first conveying pipe (5) that is fixedly installed with the second-stage anaerobic culture chamber (2). The bottom of the second-stage anaerobic culture chamber (2) is fixedly installed with a second conveying pipe (6) that is fixedly installed with the third-stage anaerobic culture chamber (3). Both ends of the first conveying pipe (5) and the second conveying pipe (6) are provided with a composite threaded seat (7) that is threadedly connected to the first-stage anaerobic culture chamber (1), the second-stage anaerobic culture chamber (2) and the third-stage anaerobic culture chamber (3). The interior of the composite threaded seat (7) is provided with a support guide plate (8) for guiding it. The interior of the composite threaded seat (7) is fixedly installed with an electromagnetic adsorption plate (9) for magnetic attraction and fixation.
2. The multi-stage series microbial culture device as described in claim 1, characterized in that: The surfaces of the first-stage anaerobic culture chamber (1), the second-stage anaerobic culture chamber (2), and the third-stage anaerobic culture chamber (3) are provided with support frames for supporting and fixing them. The bottom and top of the first-stage anaerobic culture chamber (1), the second-stage anaerobic culture chamber (2), and the third-stage anaerobic culture chamber (3) are all provided with stainless iron ring plates for attracting electromagnetic adsorption plates (9).
3. The multi-stage series microbial culture device as described in claim 2, characterized in that: Both ends of the first conveying pipe (5) and the second conveying pipe (6) are provided with ring platforms (10) to limit their movement. The ring platforms (10) of the first conveying pipe (5) and the second conveying pipe (6) are located inside the composite thread seat (7).
4. The multi-stage series microbial culture device as described in claim 3, characterized in that: The composite threaded seat (7) is fitted onto the surface of the first conveying pipe (5) and the second conveying pipe (6). One end of the composite threaded seat (7) is provided with a handle for rotating it. One end of the composite threaded seat (7) is provided with a slot with an inner diameter smaller than the diameter of the ring platform (10) and equal to the diameter of the first conveying pipe (5) and the second conveying pipe (6).
5. The multi-stage series microbial culture device as described in claim 4, characterized in that: The support guide plate (8) includes a connecting plate (81) for support, an elastic guide post (82) made of elastic material and a fixed plate (83) for connection. The connecting plate (81) is rotatably connected to the interior of the composite thread seat (7). A plurality of circumferentially distributed elastic guide posts (82) are fixedly installed at one end of the connecting plate (81), and a fixed plate (83) fixedly installed at one end of the elastic guide post (82) and the ring platform (10).
6. The multi-stage series microbial culture device as described in claim 5, characterized in that: The electromagnetic adsorption plate (9) includes an electromagnetic coil (91) that generates a magnetic field by an electric current and a magnetic pole plate (92) for magnetization. The electromagnetic coil (91) is fixedly installed inside the composite threaded seat (7). A magnetic pole plate (92) located inside the composite threaded seat (7) is provided on one side of the electromagnetic coil (91). The electromagnetic coil (91) is electrically connected to a control circuit and a battery module for switching and functioning on and off.
7. The multi-stage series microbial culture device as described in claim 6, characterized in that: The control circuit is electrically connected to an indicator light (11) that indicates the operation of the electromagnetic coil (91), and the indicator light (11) is fixedly installed inside the composite threaded seat (7).