Centrifugal concentration rotating concentricity guaranteeing device

Abstract

The invention relates to the technical field of centrifugal concentration devices, in particular to a centrifugal concentration rotating concentricity guaranteeing device. According to the technical scheme, the device comprises a rack and an axis fixing system mounted on the rack, wherein the axis fixing system comprises a mounting box, a supporting cylinder rotationally mounted in the mounting box and a plurality of groups of clamping mechanisms mounted on the supporting cylinder. The clamping mechanism is connected with a balance weight ring located outside the supporting cylinder through hydraulic transmission, an electromagnet fixedly connected with the lifting mechanism is arranged above the balance weight ring, and the balance weight ring is driven to press downwards in a non-contact mode through electromagnetic attraction force, so that the clamping mechanism synchronously acts to conduct self-centering clamping on the penicillin bottle. According to the scheme, a power source is arranged on a static part, accurate transmission and adjustment of clamping force are achieved through hydraulic transmission and electromagnetic control, arrangement of electrical elements on a rotating part is avoided, dynamic balance design is simplified, concentricity and operation stability during high-speed centrifugation are effectively guaranteed, the structure is compact, and adaptability is high.

Description

Technical Field

[0001] This invention relates to the field of centrifugal concentration apparatus technology, and more particularly to a centrifugal concentration apparatus that ensures concentric rotation. Background Technology

[0002] Centrifugal concentration technology is widely used in research fields such as biopharmaceuticals, medical testing, chemical analysis, and life sciences. It primarily uses a combination of vacuum, heating, and high-speed centrifugation to rapidly concentrate or dry trace amounts of sample within vials. During this process, the vial rotates at high speed along with its holder to accelerate the evaporation of the sample liquid under centrifugal force. To ensure uniform concentration, equipment stability, and sample safety, the vial must remain highly concentric with the axis of rotation throughout the process. Insufficient concentricity can lead to increased equipment vibration and noise, and may even cause the vial to break due to uneven stress, resulting in sample loss or equipment damage.

[0003] During centrifugal concentration, vials require precise axial positioning and fixation before high-speed rotation to ensure they align with the rotation axis of the vial holder. Existing technology typically employs multiple linkage mechanisms that move synchronously from all sides towards the center to achieve centering and clamping of the vials. However, these positioning components need to rotate at high speed with the vial holder along with the vials, which presents the following drawbacks in actual operation:

[0004] First, under the centrifugal force generated by high-speed rotation, the kinematic pairs in the linkage mechanism are prone to loosening, leading to a decrease in positioning accuracy and even clamping failure. Second, it is difficult to set up the power unit that drives these positioning components. If the power unit such as the motor is installed on the rotating part, it is necessary not only to solve the circuit connection and signal transmission problems under high-speed rotation, but also to perform strict dynamic balancing of the entire rotating body to prevent swaying caused by uneven mass distribution, which increases the structural complexity and manufacturing cost.

[0005] If the power unit is placed on a stationary component, the motion must be transmitted to the positioning component inside the rotating body through a complex transmission mechanism. This brings about problems such as sealing, wear and transmission clearance between the moving and stationary components, which further affects the positioning accuracy and system reliability. Summary of the Invention

[0006] The purpose of this application is to address the problems existing in the background technology by proposing a centrifugal concentration device that ensures concentricity while maintaining structural simplicity, power arrangement, and long-term operational stability.

[0007] The technical solution of this application: A centrifugal concentration device ensuring concentric rotation, including a frame, and further comprising:

[0008] A shaft-fixing system mounted on the frame to hold vials;

[0009] The shaft fixing system includes a mounting box and a support cylinder rotatably mounted in the mounting box for supporting vials. The support cylinder is equipped with multiple clamping mechanisms and a power source. The clamping mechanisms amplify the power source and clamp the vials to position and fix the shaft.

[0010] The clamping mechanism includes a thick cylinder fixedly installed on a support cylinder and a thin cylinder with an inner diameter smaller than that of the thick cylinder. The power source controls the hydraulic pressure inside the thin cylinder. The thick cylinder and the thin cylinder are hydraulically driven and pressure is applied to the vial through the thick cylinder.

[0011] The thin cylinder is slidably and sealed with a sealing plug, and a pressure rod is fixedly installed on the sealing plug. A counterweight ring is fixedly installed on multiple pressure rods.

[0012] Multiple lifting mechanisms are fixedly installed inside the mounting box. The power source includes an electromagnet fixedly installed on the lifting mechanism and an iron ring fixedly installed on the counterweight ring. The lifting mechanism controls the distance between the electromagnet and the iron ring.

[0013] Optionally, the clamping mechanism further includes a sealing plate that is slidably and sealingly connected to the inside of the coarse cylinder, a pressure rod is fixedly installed on the sealing plate, and a clamping block is fixedly installed on the pressure rod.

[0014] Optionally, one end of the thin cylinder and one end of the thick cylinder are connected by a pipe, and the pipe, the side of the thick cylinder near the thin cylinder, and the side of the thin cylinder near the thick cylinder are all filled with hydraulic medium.

[0015] Optionally, the pipeline is made of steel.

[0016] Optionally, a guide rod is fixedly installed on the clamping block, and the guide rod includes a vertical rod fixedly installed on the clamping block and an arc-shaped rod provided on the vertical rod.

[0017] Optionally, the lifting mechanism includes a push rod motor fixedly installed inside the mounting box and a connecting plate fixedly installed on the output shaft of the push rod motor, and a distance sensor is fixedly installed on the connecting plate;

[0018] The electromagnet is fixedly connected to the connecting plate.

[0019] Optionally, a centrifugal drive system is fixedly installed on the mounting box. The centrifugal drive system is fixedly connected to the support cylinder and drives the vial to rotate.

[0020] Optionally, a sliding system is installed on the frame, which is connected to the mounting box and drives the mounting box to move horizontally.

[0021] Optionally, a vertical drive system and a bottle mouth sealing connector are installed on the frame. The vertical drive system drives the bottle mouth sealing connector to move in the vertical direction, and the bottle mouth sealing connector seals and connects to the end of the vial.

[0022] Optionally, a vacuum adsorption system is installed on the frame, which is connected to the bottle mouth sealing connector and evacuates the inside of the vial.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] This application achieves flexible self-centering clamping of vials by completely decoupling the power source from the rotating parts, using electromagnetic non-contact drive of the counterweight ring, and synchronously controlling multiple clamping mechanisms via hydraulic transmission.

[0025] This application fundamentally avoids the problems of circuit connection difficulties, signal interference and complex dynamic balancing caused by arranging electrical components on high-speed rotating bodies, and significantly improves the operational reliability and safety of the equipment.

[0026] The incompressibility of the hydraulic medium ensures timely transmission and stable output of clamping force. The synchronous action of multiple clamping blocks ensures that the vial and the axis of rotation are highly aligned, effectively eliminating the risk of vibration and sample breakage caused by eccentricity, ensuring structural stability under high-speed rotation. The overall structure is compact, highly automated, and can flexibly adapt to vials of different sizes. Attached Figure Description

[0027] Figure 1 Schematic diagram of the rotating concentric device for centrifugal concentration Figure 1 ;

[0028] Figure 2 Schematic diagram of the rotating concentric device for centrifugal concentration Figure 2 ;

[0029] Figure 3 Schematic diagram of the rotating concentric device for centrifugal concentration Figure 3 ;

[0030] Figure 4 Schematic diagram of the rotating concentric device for centrifugal concentration Figure 4 ;

[0031] Figure 5 This is a schematic diagram of the shaft fixing system;

[0032] Figure 6 This is a schematic diagram showing the location of the clamping mechanism;

[0033] Figure 7 Schematic diagram of the clamping mechanism Figure 1 ;

[0034] Figure 8 Schematic diagram of the clamping mechanism Figure 2 ;

[0035] Figure 9 for Figure 8 A magnified view of a portion of point A in the middle.

[0036] Reference numerals: 1. Frame; 2. Shaft fixing system; 21. Mounting box; 22. Support cylinder; 23. Clamping mechanism; 231. Mounting plate; 232. Coarse cylinder; 233. Sealing plate; 234. Pressure rod; 235. Clamping block; 236. Fine cylinder; 237. Sealing plug; 238. Pressure rod; 239. Pipe; 24. Counterweight ring; 25. Lifting mechanism; 251. Push rod motor; 252. Connecting plate; 253. Distance sensor; 26. Power source; 261. Electromagnet; 262. Iron ring; 27. Guide rod; 271. Vertical rod; 272. Arc rod; 3. Centrifugal drive system; 4. Sliding system; 5. Vertical drive system; 6. Bottle mouth sealing connector; 7. Vacuum adsorption system; 8. Vial. Detailed Implementation

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] Example: Figure 1 and Figures 5 to 9 As shown, the centrifugal concentration device proposed in this application includes a frame 1 and an axis fixing system 2 mounted on the frame 1 for accommodating vials 8. The axis fixing system 2 is used to accurately position and clamp the vials 8 before centrifugal concentration, ensuring that they remain concentric with the axis of rotation during high-speed rotation, thereby effectively reducing vibration, lowering noise, and avoiding the risk of vial breakage due to eccentricity, providing a stable and reliable clamping foundation for the subsequent centrifugation process.

[0039] Furthermore, the shaft fixing system 2 includes a mounting box 21 and a support cylinder 22 rotatably mounted in the mounting box 21 for supporting the vial 8. Multiple clamping mechanisms 23 and a power source 26 are mounted on the support cylinder 22. The clamping mechanism 23 amplifies the clamping force of the power source 26 to position and fix the shaft of the vial 8. The clamping mechanism 23 amplifies the small force output by the power source 26 into a strong clamping force through hydraulic transmission, so that the vial 8 is firmly clamped. At the same time, since a non-contact hydraulic transmission method is adopted, the power source 26 does not need to be installed on the rotating support cylinder 22, avoiding the difficulties in circuit connection and dynamic balance problems caused by arranging electrical components on high-speed rotating parts, significantly improving the reliability and safety of the system, and simplifying the structure of the rotating body.

[0040] Furthermore, the clamping mechanism 23 includes a coarse cylinder 232 fixedly installed on the support cylinder 22 and a fine cylinder 236 with an inner diameter smaller than that of the coarse cylinder 232. The power source 26 controls the hydraulic pressure inside the fine cylinder 236. The coarse cylinder 232 and the fine cylinder 236 are hydraulically transmitted and pressure is applied to the vial 8 through the coarse cylinder 232. The power source 26 controls the hydraulic pressure inside the fine cylinder 236 to push the sealing plug 237 and the pressure rod 238 to move, and then transmits the hydraulic medium to the coarse cylinder 232, causing the sealing plate 233 inside the coarse cylinder 232 to drive the pressure rod 234 and the clamping block 235 to move towards the center, thereby clamping the vial 8.

[0041] A sealing plug 237 slides and is sealed inside the thin cylinder 236. A pressure rod 238 is fixedly installed on the sealing plug 237. A counterweight ring 24 is fixedly installed on multiple pressure rods 238. The counterweight ring 24 is fixed to multiple pressure rods 238. When the counterweight ring 24 is subjected to downward pressure, all pressure rods 238 press down synchronously, causing the hydraulic pressure in each thin cylinder 236 to increase synchronously, thereby driving all clamping mechanisms 23 to act simultaneously, achieving uniform clamping of the vial 8. This method of applying pressure centrally through the counterweight ring 24 eliminates the need to set up a separate drive on each set of clamping mechanisms 23, resulting in a simple structure. Furthermore, since the counterweight ring 24 is located outside the support cylinder 22 and has no mechanical connection with the power source 26, it is easy to achieve contactless control. At the same time, the counterweight ring 24 can be designed to counterbalance the centrifugal force during rotation, ensuring the dynamic balance of the support cylinder 22.

[0042] The support cylinder 22 is equipped with multiple mounting plates 231. The coarse cylinder 232 is fixedly mounted on the mounting plates 231. The clamping mechanism 23 also includes a sealing plate 233 that slides and seals inside the coarse cylinder 232. A pressure rod 234 is fixedly mounted on the sealing plate 233, and a clamping block 235 is fixedly mounted on the pressure rod 234. One end of the thin cylinder 236 and one end of the coarse cylinder 232 are connected through a pipe 239. The pipe 239, the side of the coarse cylinder 232 near the thin cylinder 236, and the side of the thin cylinder 236 near the coarse cylinder 232 are all filled with hydraulic medium. When the sealing plug 237 inside the thin cylinder 236 is pushed downward by the pressure rod 238, the hydraulic medium inside the thin cylinder 236 is compressed and transmitted to the coarse cylinder 232 through the pipe 239, pushing the sealing plate 233 and the pressure rod 234 to extend outward, so that the clamping block 235 is tightly attached to the outer wall of the vial 8. Since each thin cylinder 236 is pressurized synchronously through the counterweight ring 24, all clamping blocks 235 move towards the center at the same time until they are in uniform contact with the vial 8, thereby achieving self-centering clamping. The hydraulic medium is an incompressible liquid, which ensures the immediacy of pressure transmission and the stability of clamping.

[0043] It is worth noting that pipe 239 is made of steel. Steel pipe has sufficient rigidity and will not deform or swing due to centrifugal force when rotating at high speed, thus ensuring the stability and sealing of the hydraulic circuit. At the same time, the uniformly arranged steel pipe is conducive to the symmetrical mass distribution of the support cylinder 22, which facilitates dynamic balance calibration and makes the centrifugal forces in each direction cancel each other out, avoiding vibration caused by pipe deformation or mass eccentricity.

[0044] The clamping block 235 is fixedly equipped with a guide rod 27, which includes a vertical rod 271 fixedly installed on the clamping block 235 and an arc-shaped rod 272 provided on the vertical rod 271. When the vial 8 is not placed, the counterweight ring 24, under its own weight, causes the clamping block 235 to be in the initial position of inward contraction through the pressure rod 238. When the vial 8 is placed, the bottom edge of the vial first contacts the arc-shaped rod 272. As the vial is pressed down, the guide rod 27 is pushed outward, thereby causing the clamping block 235 to overcome the pressure of the counterweight ring 24 and move outward, so that the vial can be smoothly put into the support cylinder 22. The vial can be easily filled without additional operation. During the filling process, the clamping block 235 always maintains slight contact with the vial, laying the foundation for subsequent precise positioning.

[0045] like Figures 7 to 9 As shown, in this embodiment, multiple lifting mechanisms 25 are fixedly installed inside the mounting box 21. The power source 26 includes an electromagnet 261 fixedly installed on the lifting mechanism 25 and an iron ring 262 fixedly installed on the counterweight ring 24. The lifting mechanism 25 controls the distance between the electromagnet 261 and the iron ring 262. By adjusting the distance between the electromagnet 261 and the iron ring 262, the magnitude of the electromagnetic attraction can be precisely controlled, thereby changing the downward pull on the counterweight ring 24 and indirectly controlling the hydraulic pressure inside the thin cylinder 236.

[0046] Specifically, when the power and spacing of the electromagnets 261 are fixed, the attraction force is constant, and the pressure on the counterweight ring 24 is constant, thus maintaining a constant clamping force. There is no need to install a pressure sensor on the rotating support cylinder 22, avoiding the problems of sensor cable entanglement and signal interference caused by rotation. At the same time, since the power source 26 is located entirely on the stationary mounting box 21, the support cylinder 22 only contains mechanical parts such as hydraulic components and counterweight ring 24, which makes it easy to achieve dynamic balance and ensures stability during high-speed rotation.

[0047] Furthermore, the lifting mechanism 25 includes a push rod motor 251 fixedly installed inside the mounting box 21, and a connecting plate 252 fixedly installed on the output shaft of the push rod motor 251. A distance sensor 253 is fixedly installed on the connecting plate 252. An electromagnet 261 is fixedly connected to the connecting plate 252. The push rod motor 251 drives the connecting plate 252 to lift and lower, thereby changing the height of the electromagnet 261 and adjusting the distance between the electromagnet and the iron ring 262. The distance sensor 253 detects the position of the connecting plate 252 in real time and feeds it back to the control system to ensure that the distance between the electromagnet 261 and the iron ring 262 is precisely controllable, thereby achieving precise adjustment of the clamping force. This allows the clamping force to be flexibly set according to the specifications and process requirements of the vial 8, improving the adaptability and automation level of the equipment.

[0048] like Figures 1 to 4 As shown, in this embodiment, a centrifugal drive system 3 is fixedly installed on the mounting box 21. The centrifugal drive system 3 is fixedly connected to the support cylinder 22 and drives the vial 8 to rotate. The centrifugal drive system 3 provides rotational power to the support cylinder 22, enabling the vial 8 to rotate at high speed in a clamped state, thereby achieving centrifugal concentration. A sliding system 4 is installed on the frame 1. The sliding system 4 is connected to the mounting box 21 and drives the mounting box 21 to move horizontally. The sliding system 4 is used to move the mounting box 21 as a whole to different work positions, such as the feeding position and the centrifugation position, which facilitates operation and automation. A vertical drive system 5 and a bottle mouth sealing connector 6 are installed on the frame 1. The vertical drive system 5 drives the bottle mouth sealing connector 6 to move vertically. The bottle mouth sealing connector 6 seals and connects to the end of the vial 8. The vertical drive system 5 controls the lifting and lowering of the bottle mouth sealing connector 6 so that it can align and seal with the bottle mouth of the vial 8 when needed. The bottle mouth sealing connector 6 adopts a flexible sealing structure to ensure airtightness under rotation and vacuum conditions. A vacuum adsorption system 7 is installed on the frame 1. The vacuum adsorption system 7 is connected to the bottle mouth sealing connector 6 and evacuates the inside of the vial 8. The vacuum adsorption system 7 creates a low-pressure environment to promote sample volatilization by evacuating the inside of the vial 8 through the bottle mouth sealing connector 6.

[0049] During operation, the vial 8 is first placed into the support cylinder 22 and positioned and clamped by the shaft fixing system 2. Then, the sliding system 4 moves the mounting box 21 to below the bottle mouth sealing connector 6. The vertical drive system 5 drives the bottle mouth sealing connector 6 to move down and seal with the bottle mouth of the vial 8. Next, the centrifugal drive system 3 is started, driving the support cylinder 22 and the vial 8 to rotate. At the same time, the vacuum adsorption system 7 starts to draw a vacuum, so that the sample is rapidly concentrated under the action of vacuum and centrifugal force. The whole process is completed automatically, and the various systems work together to ensure concentration efficiency and sample safety.

[0050] Working principle: Through the hydraulic clamping mechanism 23 in the shaft fixing system 2, the counterweight ring 24 is controlled by non-contact electromagnetic force to evenly transmit the force of the external power source 26 to multiple clamping blocks 235, realizing flexible self-centering clamping of the vial 8, ensuring that it is highly aligned with the rotation axis of the support cylinder 22. After clamping, the sliding system 4 moves the mounting box 21 to the centrifuge station. The bottle mouth sealing connector 6 is sealed with the bottle mouth under the action of the vertical drive system 5. Then, the centrifugal drive system 3 drives the support cylinder 22 to rotate at high speed, while the vacuum adsorption system 7 evacuates the inside of the vial, completing the sample collection. This vacuum centrifugal concentration device completely solves the problems of circuit connection difficulties, complex dynamic balancing, and clamping loosening caused by centrifugal force in traditional designs by placing the power source in a stationary part and using hydraulic transmission and electromagnetic contactless control. At the same time, multiple clamping mechanisms 23 synchronously hydraulically transmit high-precision centering and uniform clamping, effectively avoiding vibration and sample loss caused by eccentricity, significantly improving the reliability, safety and concentration effect of the equipment. The overall structure is compact, highly automated, and suitable for various sizes of vials 8.

[0051] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A centrifugal concentration apparatus for ensuring concentric rotation, comprising a frame (1), characterized in that, Also includes: A shaft fixing system (2) is installed on the frame (1) to accommodate vials (8). The shaft fixing system (2) includes a mounting box (21) and a support cylinder (22) rotatably mounted in the mounting box (21) for carrying vials (8). Multiple clamping mechanisms (23) and a power source (26) are mounted on the support cylinder (22). The clamping mechanism (23) amplifies the power source (26) and clamps the vial (8) to position and fix the shaft. The clamping mechanism (23) includes a coarse cylinder (232) fixedly installed on the support cylinder (22) and a thin cylinder (236) with an inner diameter smaller than that of the coarse cylinder (232). The power source (26) controls the hydraulic pressure inside the thin cylinder (236). The coarse cylinder (232) and the thin cylinder (236) are hydraulically driven and pressure is applied to the vial (8) through the coarse cylinder (232). The thin cylinder (236) is slidably and sealingly connected with a sealing plug (237), and a pressure rod (238) is fixedly installed on the sealing plug (237). A counterweight ring (24) is fixedly installed on multiple pressure rods (238). Multiple lifting mechanisms (25) are fixedly installed inside the mounting box (21). The power source (26) includes an electromagnet (261) fixedly installed on the lifting mechanism (25) and an iron ring (262) fixedly installed on the counterweight ring (24). The lifting mechanism (25) controls the distance between the electromagnet (261) and the iron ring (262).

2. The centrifugal concentration and concentric rotation device according to claim 1, characterized in that, The clamping mechanism (23) further includes a sealing plate (233) that is slidably and sealingly connected to the inside of the coarse cylinder (232), a pressure rod (234) is fixedly installed on the sealing plate (233), and a clamping block (235) is fixedly installed on the pressure rod (234).

3. The centrifugal concentration and concentric rotation device according to claim 2, characterized in that, One end of the thin cylinder (236) and one end of the thick cylinder (232) are connected by a pipe (239). The pipe (239), the side of the thick cylinder (232) near the thin cylinder (236), and the side of the thin cylinder (236) near the thick cylinder (232) are all filled with hydraulic medium.

4. The centrifugal concentration and concentric rotation device according to claim 3, characterized in that, The pipeline (239) is made of steel.

5. The centrifugal concentration and concentric rotation device according to claim 4, characterized in that, A guide rod (27) is fixedly installed on the clamping block (235). The guide rod (27) includes a vertical rod (271) fixedly installed on the clamping block (235) and an arc-shaped rod (272) provided on the vertical rod (271).

6. The centrifugal concentration and concentric rotation device according to claim 5, characterized in that, The lifting mechanism (25) includes a push rod motor (251) fixedly installed inside the mounting box (21) and a connecting plate (252) fixedly installed on the output shaft of the push rod motor (251). A distance sensor (253) is fixedly installed on the connecting plate (252). The electromagnet (261) is fixedly connected to the connecting plate (252).

7. The centrifugal concentration and concentric rotation device according to claim 1, characterized in that, A centrifugal drive system (3) is fixedly installed on the mounting box (21). The centrifugal drive system (3) is fixedly connected to the support cylinder (22) and drives the vial (8) to rotate.

8. The centrifugal concentration and concentric rotation device according to claim 1, characterized in that, A sliding system (4) is installed on the frame (1), the sliding system (4) is connected to the mounting box (21) and drives the mounting box (21) to move horizontally.

9. The centrifugal concentration and concentric rotation device according to claim 1, characterized in that, The frame (1) is equipped with a vertical drive system (5) and a bottle mouth sealing connector (6). The vertical drive system (5) drives the bottle mouth sealing connector (6) to move in the vertical direction. The bottle mouth sealing connector (6) seals and connects the end of the vial (8).

10. A centrifugal concentration device for ensuring concentric rotation according to claim 9, characterized in that, A vacuum adsorption system (7) is installed on the frame (1). The vacuum adsorption system (7) is connected to the bottle mouth sealing connector (6) and evacuates the vial (8).

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