Biological sample centrifugal machine
By using a servo motor and shock absorbing mechanism in the centrifuge and combining the design of setting up reinforcements on the transmission shaft, the problems of large vibration and imbalance in traditional centrifuges under large sample sizes are solved, achieving more efficient and stable experimental operations.
Patent Information
- Application Number
- CN202421817052.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-30
AI Technical Summary
When facing a large sample size, the moment of inertia is limited, resulting in large vibrations and serious imbalance problems, which affects the experimental efficiency and equipment stability.
A biological sample centrifuge is designed, using a servo motor and shock absorber mechanism (including springs and rubber shock absorbers) to reduce vibrations, and reinforcements are provided on the drive shaft to improve moment of inertia tolerance.
It effectively reduces the vibration during the centrifuge operation, solves the imbalance caused by uneven liquid addition of centrifuge tubes, improves experimental efficiency and equipment stability, and meets the experimental needs of large samples.
Smart Images
Figure CN222984603U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of laboratory equipment, and particularly relates to a biological sample centrifuge. Background Art
[0002] In daily laboratory operations, it is often necessary to centrifuge samples in centrifuge tubes, and centrifuge equipment is used. A centrifuge is a machine that uses centrifugal force to accelerate different materials to be separated and then separate them. Centrifuges are mainly used to separate solid particles from a suspension from the liquid, or to separate two immiscible liquids with different densities in an emulsion; it can also be used to remove liquid from wet solids; special ultra-high-speed tubular separators can also separate gas mixtures with different densities; using the characteristic that solid particles with different densities or particle sizes have different sedimentation rates in a liquid, some sedimentation centrifuges can also classify solid particles according to density or particle size. With the increase in workload, it is necessary to use automated equipment to replace manual operations, and the demand for fully automatic centrifuges is also increasing.
[0003] Due to the direct connection of the traditional centrifuge to the motor using a coupling, the sample volume it can carry is relatively small. The strength of the transmission shaft is insufficient, and the bearing capacity of the moment of inertia is limited, often resulting in inability to cope when facing the centrifugation requirements of a large sample volume, which restricts the scale and efficiency of the experiment. In addition, the shock absorption of the centrifuge is relatively simple, usually only having a single shock absorption device, which is difficult to effectively reduce the vibration during the operation of the centrifuge, cannot meet the experimental requirements of a large sample volume, and the imbalance problem caused by uneven liquid addition to the centrifuge tubes on the rotor is difficult to be well solved, affecting the experimental effect and the stability of the equipment. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a biological sample centrifuge, which reduces the vibration during the operation of the centrifuge and effectively solves the imbalance problem caused by uneven liquid addition to the centrifuge tubes on the rotor of the centrifuge.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a biological sample centrifuge, including a main chassis and a sealed machine cover rotatably connected to one side of the main chassis, further including a centrifuge rotor, a servo motor, a shock absorption mechanism and a transmission shaft. Centrifuge tubes are placed on the centrifuge rotor; an inner cavity of the chassis is provided above the interior of the main chassis, and the centrifuge rotor is arranged in the inner cavity of the chassis; the servo motor is arranged in the main chassis below the inner cavity of the chassis. An upper fixing plate and a lower fixing plate are provided in the main chassis. The shock absorption mechanism is arranged between the upper fixing plate and the lower fixing plate. The lower fixing plate is fixedly connected to the main chassis, the upper fixing plate is spaced from the inner wall of the main chassis, the upper part of the servo motor is fixedly connected to the upper fixing plate, the servo motor is electrically connected to the control module; one end of the transmission shaft is connected to the output end of the servo motor, and the other end is connected to the centrifuge rotor.
[0006] Preferably, the shock absorption mechanism includes a spring shock absorber and a rubber shock absorber. The spring shock absorber is arranged between the upper fixing plate and the lower fixing plate, and the rubber shock absorber is arranged between the output end of the servo motor and the upper fixing plate.
[0007] Preferably, a reinforcing member is sleeved outside the transmission shaft.
[0008] Preferably, the reinforcing member includes a transmission shaft fixing seat and a plurality of bearings. The plurality of bearings are sleeved on the transmission shaft, the transmission shaft fixing seat is sleeved outside the bearings, and the bottom of the transmission shaft fixing seat is fixedly connected to the upper fixing plate.
[0009] Preferably, an encoder is provided on the servo motor.
[0010] Preferably, a disinfection mechanism is further provided in the main chassis. The disinfection mechanism includes a vaporization module and a hydrogen peroxide residue removal module fixed in the main chassis. An injection pipe is provided on the vaporization module, and the injection pipe communicates with the inner cavity of the box. A recovery pipe is provided on the hydrogen peroxide residue removal module, and the recovery pipe is connected to the bottom of the inner cavity of the box.
[0011] Preferably, the sealing cover is rotatably connected to the upper part of the side wall of the main chassis and is movably arranged above the main chassis through an electric push rod. A sealing rubber strip is further provided on the main chassis. When the sealing cover is closed, it closes the inner cavity of the box and contacts the sealing rubber strip.
[0012] Preferably, a fixed flange is sleeved outside the main chassis.
[0013] Preferably, a plurality of fixed feet are provided at the bottom of the main chassis.
[0014] Compared with the prior art, the above technical solution has the following beneficial effects:
[0015] 1. The setting of the servo motor of the biological sample centrifuge of the present invention not only enables the centrifuge rotor to be adapted to the angle rotor and the horizontal rotor, but also realizes the arbitrary positioning of the working position of the centrifuge rotor. The setting of the shock absorption mechanism reduces the vibration during the operation of the centrifuge and effectively solves the imbalance problem caused by uneven liquid addition to the centrifuge tubes on the centrifuge rotor.
[0016] 2. The present invention is equipped with a hydrogen peroxide disinfection mechanism, which can quickly and conveniently achieve disinfection and avoid cross-infection. It has the advantages of faster speed, no dead angle, and higher sterilization rate compared with ultraviolet disinfection.
[0017] 3. The biological sample centrifuge of the present invention is provided with a reinforcing member on the transmission shaft, which meets the experimental requirements for a larger amount of centrifuged samples.
[0018] 4. By setting fixed feet at the bottom of the main chassis and arranging a fixed flange outside the main chassis, the utility model has two installation methods: floor-mounted and embedded, which are convenient for adapting to automated workstations in different scenarios and can also reduce the floor area of the workstation. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a cross-sectional view of the biological sample centrifuge of the utility model.
[0020] Figure 2 is Figure 1 an enlarged view of part A in
[0021] Figure 3 It is a schematic diagram of the internal structure of the biological sample centrifuge of the utility model.
[0022] Figure 4 is Figure 3 an enlarged view of part B in
[0023] Figure 5 It is a top view of the biological sample centrifuge of the utility model.
[0024] Figure 6 It is a side view of the biological sample centrifuge of the utility model.
[0025] Wherein: 1. Main chassis; 101. Inner cavity of the box; 2. Centrifuge tube; 3. Electric push rod; 4. Centrifuge rotor; 5. Sealing machine cover; 6. Fixed flange; 7. Upper fixing plate; 8. Spring shock absorber; 9. Rubber shock absorber; 10. Servo motor; 11. Fixed feet; 12. Lower fixing plate; 13. Transmission shaft; 14. Transmission shaft fixing seat; 15. Electromagnetic lock; 16. Control module; 17. Disinfection mechanism; 1701. Vaporization module; 1702. Injection pipe; 1703. Recovery pipe; 1704. Hydrogen peroxide residue removal module. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] Figures 1 to 6 is the best embodiment of the utility model. The following further describes the utility model in conjunction with the attached Figures 1 to 6 drawings.
[0027] As Figures 1 to 2As shown, a biological sample centrifuge of the utility model comprises a main case 1 and a sealing cover 5 rotatably connected to one side of the main case 1, a case inner cavity 101 is provided above the inside of the main case 1, a centrifuge rotor 4 is arranged in the case inner cavity 101, and a centrifuge tube 2 is placed on the centrifuge rotor 4; a servo motor 10 is arranged in the main case 1 below the case inner cavity 101, an upper fixed plate 7 and a lower fixed plate 12 are provided in the main case 1, a shock absorbing mechanism is arranged between the upper fixed plate 7 and the lower fixed plate 12, the lower fixed plate 12 is fixedly connected to the main case 1, the upper fixed plate 7 is spaced apart from the inner wall of the main case 1, and the upper part of the servo motor 10 is fixedly connected to the upper fixed plate 7; one end of the transmission shaft 13 is connected to the output end of the servo motor 10, and the other end is connected to the centrifuge rotor 4. The setting of the servo motor 10 of the biological sample centrifuge of the utility model not only makes the centrifuge rotor 4 adaptable to the angle rotor and the horizontal rotor, but also realizes the arbitrary positioning of the working position of the centrifuge rotor 4. The setting of the shock absorbing mechanism reduces the vibration of the centrifuge when working, and effectively solves the imbalance problem caused by uneven liquid addition of the centrifuge tube 2 on the centrifuge rotor 4.
[0028] A disinfection mechanism 17 and a control module 16 are provided in the main housing 1, and the servo motor 10 and the disinfection mechanism 17 are electrically connected to the control module 16. The fully automatic biological sample centrifuge not only effectively solves the imbalance problem caused by uneven liquid addition to the centrifuge tube 2 on the centrifuge rotor 4, but also significantly improves the degree of automation, bringing convenience to the experimenter.
[0029] Specifically, the shock absorbing mechanism includes a spring shock absorber 8 and a rubber shock absorber 9, the spring shock absorber 8 is arranged between the upper fixed plate 7 and the lower fixed plate 12, the upper fixed plate 7 is connected to the spring shock absorber 9 and is arranged at intervals with the inner wall of the main box 1, and the rubber shock absorber 9 is arranged between the output end of the servo motor 10 and the upper fixed plate 7. The spring shock absorber 8 and the rubber shock absorber 9 constitute a secondary shock absorbing system, which can reduce the vibration of the centrifuge during operation and reduce the imbalance problem caused by uneven liquid addition to the rotor test tube; at the same time, it can also adapt to the fast start and fast stop mode, and reduce the shaking caused by excessive acceleration of the lifting and lowering speed. In this embodiment, an encoder is provided on the servo motor 10, and the encoder is electrically connected to the control module 16. By detecting the pulse signal, the speed, position and other working information can be determined. The control module 16 is mainly composed of components such as a PLC controller and a servo motor 10 driver. The controller can realize the working positioning through the servo motor 10 encoder, open and close the door in time, and facilitate the mechanical arm and other components to grab the sample test tube. It can also be connected to the host computer communication, adapt to the automated workstation, and realize multi-level linkage and centralized monitoring.
[0030] In this embodiment, a reinforcing member is sleeved outside the transmission shaft 13. The setting of the reinforcing member enables the centrifuge rotor 4 to bear a greater moment of inertia, meeting the experimental requirements for a larger centrifuged sample volume. Specifically, the reinforcing member includes a transmission shaft fixing seat 14 and a plurality of bearings. The plurality of bearings are sleeved on the transmission shaft 13, and the transmission shaft fixing seat 14 is sleeved outside the bearings. The bottom of the transmission shaft fixing seat 14 is fixedly connected to the motor module. By combining the transmission shaft fixing seat 14 with two or more bearings above and below, high-speed operation is achieved. This connection method can bear a greater moment of inertia than the direct connection of the motor and the transmission shaft 13 through a coupling, enabling the centrifuge to meet the experimental requirements for a larger centrifuged sample volume.
[0031] Combined with Figures 3 to 4 , further, a disinfection mechanism 17 is also equipped in the main chassis 1, and the disinfection mechanism 17 is connected to the inner cavity 101 of the chassis. The disinfection mechanism 17 includes a vaporization module 1701 and a hydrogen peroxide residue removal module 1704 fixed in the main chassis 1. Hydrogen peroxide is provided in the vaporization module 1701. The vaporization module 1701 quickly generates vaporized hydrogen peroxide through the flash evaporation method. An injection pipe 1702 is provided on the vaporization module 1701, and the vaporized hydrogen peroxide is injected into the inner cavity 101 of the chassis through the injection pipe 1702 to achieve rapid disinfection of the inner cavity 101 of the chassis, the centrifuge rotor 4, and the internal centrifuge tubes 2 inside. It can achieve on-line disinfection during the sample centrifugation process or can also achieve the regular disinfection function, avoiding cross-infection during the transportation process. The hydrogen peroxide residue removal module 1704 recovers and removes the remaining hydrogen peroxide after disinfection through the recovery pipe 1703, which can not only avoid harm to personnel and the environment caused by hydrogen peroxide but also reduce the daily consumption of hydrogen peroxide. In this embodiment, the centrifuge rotor 4 is preferably made of aluminum alloy material, which can not only reduce the weight but also withstand disinfection.
[0032] Refer to Figure 1 、 5 , the sealing cover 5 is rotatably connected to the upper part of the side wall of the main chassis 1 and is movably arranged above the main chassis 1 through the electric push rod 3. The electric push rod 3 realizes the automatic opening and closing of the sealing cover 5. A sealing rubber strip is also provided on the main chassis 1. When the sealing cover 5 is closed, it closes the inner cavity 101 of the chassis and contacts the sealing rubber strip. The sealing rubber strip realizes the isolation and sealing between the inner cavity 101 of the chassis and the outside world, ensuring the safety and pollution-free of the sample. An electromagnetic lock 15 is also provided on the main chassis 1. The sealing cover 5 contacts the electromagnetic lock 15, and the electromagnetic lock 15 can determine whether the sealing cover 5 is closed in place, ensuring safety interlocking.
[0033] Such as Figure 6As shown in the figure, the utility model can be installed in a floor-standing manner. A plurality of fixed feet 11 are provided at the bottom of the main chassis 1, and the position is fixed by relying on the fixed feet 11. A fixed flange 6 is sleeved outside the main chassis 1. The utility model can also be installed in an embedded manner by relying on the fixed flange 6. The fixed flange 6 has mounting holes and positioning pins, which are convenient for the installation and positioning of the equipment, convenient for integrating an automated workstation, and saving installation space.
[0034] The specific working process of the utility model is as follows: First, place the centrifuge tube 2 on the centrifuge sleeve of the centrifuge rotor 4, and control the electric push rod 3 to close the sealing machine cover 5. When the sealing machine cover 5 is closed, it contacts the sealing rubber strip on the main chassis 1 to realize the isolation and sealing between the inner cavity 101 of the box and the outside world. At the same time, the electromagnetic lock 15 determines whether the sealing machine cover 5 is closed in place and transmits the signal to the control system. After receiving the signal that the sealing machine cover 5 is closed in place, the control module 16 controls the motor module to work, driving the centrifuge rotor 4 to rotate. The control module 16 plays a role. The encoder on the servo motor 10 is electrically connected to the control module 16. By detecting the pulse signal, the working information such as the rotation speed and position is judged. The controller realizes the working positioning through the encoder of the servo motor 10, and timely controls the electromagnetic lock 15 to open and close the door, which is convenient for a robotic arm or the like to grab the sample test tube inside the centrifuge cavity. The control module 16 can also provide a variety of protocols to connect to the host computer for communication, adapt to the automated workstation, and realize multi-level linkage and centralized monitoring. When the motor module is working, the disinfection mechanism 17 works together. The hydrogen peroxide in the vaporization module 1701 quickly generates vaporized hydrogen peroxide by flash evaporation and is injected into the inner cavity 101 of the box through the injection pipe 1702 to quickly disinfect the inner cavity 101 of the box, the centrifuge rotor 4 and the centrifuge tube 2. The hydrogen peroxide residue removal module 1704 recovers the remaining hydrogen peroxide after disinfection through the recovery pipe 1703.
[0035] The above is only the preferred embodiment of the utility model, and it is not a limitation of the utility model in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the technical solution content of the utility model still belong to the protection scope of the technical solution of the utility model.
Claims
1. A biological sample centrifuge, comprising a main case (1) and a sealing cover (5) rotatably connected to one side of the main case (1), characterized in that: It also comprises a centrifuge rotor (4), a servo motor (10), a damping mechanism and a transmission shaft (13); a centrifuge tube (2) is placed on the centrifuge rotor (4); a box inner cavity (101) is provided above the main box (1), and the centrifuge rotor (4) is arranged in the box inner cavity (101); the servo motor (10) is arranged in the main box (1) below the box inner cavity (101); an upper fixing plate (7) and a lower fixing plate (12) are provided in the main box (1); the damping mechanism is arranged between the upper fixing plate (7) and the lower fixing plate (12); the lower fixing plate (12) is fixedly connected to the main box (1); the upper fixing plate (7) is spaced apart from the inner wall of the main box (1); the upper part of the servo motor (10) is fixedly connected to the upper fixing plate (7); the servo motor (10) is electrically connected to the control module (16); one end of the transmission shaft (13) is connected to the output end of the servo motor (10), and the other end is connected to the centrifuge rotor (4); The shock absorbing mechanism comprises a spring shock absorber (8) and a rubber shock absorber (9); the spring shock absorber (8) is arranged between an upper fixing plate (7) and a lower fixing plate (12); and the rubber shock absorber (9) is arranged between an output end of a servo motor (10) and the upper fixing plate (7).
2. A biological sample centrifuge according to claim 1, characterized in that: A reinforcement piece is provided on the outer sleeve of the transmission shaft (13).
3. A biological sample centrifuge according to claim 2, characterized in that: The reinforcement member comprises a transmission shaft fixing seat (14) and a plurality of bearings, wherein the plurality of bearings are sleeved on the transmission shaft (13), the transmission shaft fixing seat (14) is sleeved outside the bearings, and the bottom of the transmission shaft fixing seat (14) is fixedly connected to the upper fixing plate (7).
4. The biological sample centrifuge according to claim 1, characterized in that: The servo motor (10) is provided with an encoder.
5. The biological sample centrifuge according to claim 1, characterized in that: A disinfection mechanism (17) is also provided in the main box (1), the disinfection mechanism (17) comprising a vaporization module (1701) and a hydrogen peroxide residue removal module (1704) fixed in the main box (1), an injection pipe (1702) is provided on the vaporization module (1701), the injection pipe (1702) is connected to the box body cavity (101), and a recovery pipe (1703) is provided on the hydrogen peroxide residue removal module (1704), and the recovery pipe (1703) is connected to the bottom of the box body cavity (101).
6. The biological sample centrifuge according to claim 1, characterized in that: The sealing cover (5) is rotatably connected to the upper part of the side wall of the main box (1) and is movably arranged above the main box (1) via an electric push rod (3). A sealing strip is also provided on the main box (1). When the sealing cover (5) is closed, it seals the inner cavity (101) of the box and contacts the sealing strip.
7. The biological sample centrifuge according to claim 1, characterized in that: The main housing (1) is sleeved with a fixing flange (6) on the outside.
8. The biological sample centrifuge according to claim 1, characterized in that: The bottom of the main box (1) is provided with a plurality of fixing feet (11).