Graphene quantum dot size grading purification centrifuge

Abstract

The utility model relates to centrifuge field especially, it is a kind of graphene quantum dot size grading purification centrifuge, technical scheme: a kind of graphene quantum dot size grading purification centrifuge, including tubular centrifuge main body, centrifuge tank body, support frame plate and arc movable plate, centrifuge tank body and driving structure are installed on tubular centrifuge main body, the utility model is in real time monitoring cleaning fluid residue by spectrum sensor, replace traditional "fixed number of times cleaning", both guarantee cleanliness, and reduce unnecessary cleaning cycle, to improve the convenience of centrifuge cleaning, and the ultrasonic vibrator driven by electric cylinder and can be telescopic adjustment, can be in cleaning by low-frequency ultrasonic vibration to make adsorbed material material fall off in centrifuge tank inner wall, to improve the cleaning efficiency of centrifuge tank body, solve the problem that existing tubular centrifuge is inconvenient to clean when being used for graphene quantum dot size grading purification, and centrifugal tank body inner wall is easily left with material.

Description

Technical Field

[0001] This utility model belongs to the field of centrifuges, specifically relating to a graphene quantum dot size fractionation purification centrifuge. Background Technology

[0002] Industrial high-speed centrifuges are key equipment used for large-scale material separation, dehydration, and clarification, and are widely used in chemical, pharmaceutical, food, environmental protection, and mining industries. Their core feature is the rapid separation of solid-liquid, liquid-liquid, or solid-liquid-gas multiphase mixtures through centrifugal force generated by high-speed rotation, offering advantages such as large processing capacity, high efficiency, and high degree of automation.

[0003] In existing technologies, centrifuges used for the size fractionation and purification of graphene quantum dots often require batch processing. During this batch process, to ensure the accuracy of the size fractionation and purification, the centrifuge tanks and rotors inside the centrifuge are often cleaned. However, traditional water-based cleaning methods are insufficient to effectively remove adsorbed materials from the rotors and the inner walls of the centrifuge tanks, especially after processing high-concentration samples, resulting in high residual levels that often directly affect the reproducibility of subsequent production or experiments. Therefore, this invention proposes a graphene quantum dot size fractionation and purification centrifuge to solve the problems existing in the prior art. Utility Model Content

[0004] To overcome the problems of existing tubular centrifuges being inconvenient to clean when used for the size fractionation and purification of graphene quantum dots, and the easy residue of materials on the inner wall of the centrifuge tank.

[0005] The technical solution of this utility model is as follows: a graphene quantum dot size fractionation purification centrifuge, including a tubular centrifuge body and a centrifuge tank, as well as a support frame plate and an arc-shaped movable plate. The centrifuge tank and drive structure are installed on the tubular centrifuge body. Two sets of support frames are symmetrically distributed on the left and right sides of the upper edge of the tubular centrifuge body. Several sets of equidistant vibration grooves are opened on the left and right sides of the outer wall of the centrifuge tank. Four sets of mounting grooves are opened through the four corner edges of the left and right ends of the support frame plate. An electric cylinder is fixedly connected in the mounting groove. The output end of the electric cylinder is connected to the end of the arc-shaped movable plate away from the centrifuge tank. Several sets of equidistant ultrasonic transducers are installed through the arc-shaped movable plate. A liquid outlet is installed on the upper outer wall of the centrifuge tank. A spectral sensor is installed in the liquid outlet. A CNC computer is installed on the right end of the tubular centrifuge body through a bracket.

[0006] Preferably, the drive structure is connected to the centrifuge tank, the lower end of the centrifuge tank is equipped with a liquid inlet, and the lower outer wall of the centrifuge tank is equipped with a residual liquid outlet.

[0007] Preferably, the support frame plate near the right side of the centrifuge tank has through slots at both ends, and the support frame plate near the left side of the centrifuge tank has an opening at the top.

[0008] Preferably, a protective cover is installed at the end of the two sets of support plates away from the centrifuge tank, and the protective cover encloses the electric cylinder.

[0009] Preferably, a rubber pad is installed at one end of the curved movable plate near the outer wall of the centrifuge tank, and several sets of equidistant through holes are opened at both ends of the rubber pad.

[0010] Preferably, the output end of the ultrasonic transducer passes through the through hole and is adapted to the vibration groove, and the end of the arc-shaped movable plate near the outer wall of the centrifuge tank is in contact with the outer wall of the centrifuge tank, with the through hole, vibration groove and ultrasonic transducer corresponding to each other.

[0011] Preferably, the end of the rubber pad near the outer wall of the centrifuge tank is in contact with the outer wall of the centrifuge tank, and the centrifuge tank is located between two sets of arc-shaped movable plates, which are located between two sets of support frame plates.

[0012] The beneficial effects of this utility model are:

[0013] 1. Real-time monitoring of cleaning solution residue using a spectral sensor replaces the traditional "fixed number of cleaning cycles," ensuring cleanliness while reducing unnecessary cleaning cycles, thereby improving the convenience of centrifuge cleaning;

[0014] 2. By using an ultrasonic transducer that can be extended and retracted and is driven by an electric cylinder, the adsorbed material can be dislodged from the inner wall of the centrifuge tank during cleaning through low-frequency ultrasonic vibration, thereby improving the cleaning efficiency of the centrifuge tank. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of the graphene quantum dot size fractionation purification centrifuge of this utility model.

[0016] Figure 2 The diagram shown is a three-dimensional structural breakdown of the graphene quantum dot size fractionation purification centrifuge of this utility model.

[0017] Figure 3 The diagram shows a three-dimensional structural schematic of the tubular centrifuge body, centrifuge tank, CNC computer, and drive structure of the graphene quantum dot size fractionation purification centrifuge of this utility model.

[0018] Figure 4 The diagram shown is a three-dimensional disassembled view of the support frame and protective cover of the graphene quantum dot size fractionation purification centrifuge of this utility model.

[0019] Figure 5 The diagram shows a three-dimensional structure of the arc-shaped movable plate, electric cylinder, and rubber pad of the graphene quantum dot size fractionation purification centrifuge of this utility model.

[0020] Figure 6 The diagram shown is a schematic diagram of the cleaning operation logic of the graphene quantum dot size fractionation purification centrifuge of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1-Cylindrical centrifuge body, 2-Support frame plate, 3-Arc-shaped movable plate, 4-CNC computer, 5-Centrifuge tank, 6-Drive structure, 7-Residual liquid outlet, 8-Liquid inlet, 9-Spectral sensor, 10-Vibration tank, 11-Liquid outlet, 12-Mounting groove, 13-Through groove, 14-Protective cover, 15-Notch, 16-Electric cylinder, 17-Ultrasonic transducer, 18-Rubber pad, 19-Through hole. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figures 1-6 This utility model provides an embodiment: a graphene quantum dot size fractionation purification centrifuge, including a tubular centrifuge body 1 and a centrifuge tank 5, and also includes a support frame plate 2 and an arc-shaped movable plate 3. The centrifuge tank 5 and a drive structure 6 are installed on the tubular centrifuge body 1. Two sets of support frame plates 2 are symmetrically distributed on the left and right sides of the upper edge of the tubular centrifuge body 1. Several sets of equidistantly distributed vibration grooves 10 are opened on the left and right sides of the outer wall of the centrifuge tank 5. The left and right sides of the support frame plate 2... Four sets of mounting slots 12 are provided through the four corner edges of the centrifuge tank 5. An electric cylinder 16 is fixedly connected in the mounting slot 12. The output end of the electric cylinder 16 is connected to the end of the arc-shaped movable plate 3 away from the centrifuge tank 5. Several sets of equidistant ultrasonic transducers 17 are installed through the arc-shaped movable plate 3. An outlet 11 is installed on the upper outer wall of the centrifuge tank 5. A spectral sensor 9 is installed in the outlet 11. A CNC computer 4 is installed on the right end of the tubular centrifuge body 1 through a bracket.

[0024] The spectral sensor 9 monitors the cleaning fluid residue in real time, replacing the traditional "fixed number of cleaning cycles". This ensures cleanliness while reducing unnecessary cleaning cycles, thereby improving the convenience of centrifuge cleaning. The ultrasonic transducer 17, which is adjustable in length and retraction and is driven by the electric cylinder 16, can use low-frequency ultrasonic vibration to dislodge the adsorbed material from the inner wall of the centrifuge tank during cleaning, thereby improving the cleaning efficiency of the centrifuge tank 5.

[0025] Please see Figure 3In this embodiment, the drive structure 6 is connected to the centrifuge tank 5. The lower end of the centrifuge tank 5 is equipped with a liquid inlet 8 and the lower outer wall of the centrifuge tank 5 is equipped with a residual liquid outlet 7. The connected drive structure 6 can provide rotational power to the centrifuge tank 5.

[0026] Please see Figure 4 In this embodiment, through grooves 13 are provided at both ends of the support frame plate 2 near the right side of the centrifuge tank 5, and a notch 15 is provided at the upper end of the support frame plate 2 near the left side of the centrifuge tank 5. The notch 15 allows the user to easily connect and install the hose to the liquid outlet 11 and can provide support for the hose. The through grooves 13 allow the residual liquid outlet 7 to pass through the support frame plate 2 and connect to the external pipeline. A protective cover 14 is installed at the end of the two sets of support frame plates 2 away from the centrifuge tank 5. The protective cover 14 covers the electric cylinder 16 and can provide dust protection and collision protection for the electric cylinder 16 to improve the service life of the electric cylinder 16.

[0027] Please see Figures 3-5 In this embodiment, a rubber pad 18 is installed at one end of the arc-shaped movable plate 3 near the outer wall of the centrifuge tank 5. Several sets of equidistant through holes 19 are provided at both ends of the rubber pad 18. The rubber pad 18 can buffer and dampen the ultrasonic transducer 17 when the electric cylinder 16 pushes it into the vibration groove 10, thus avoiding affecting the normal use and service life of the ultrasonic transducer 17. The output end of the ultrasonic transducer 17 passes through the through holes 19 and is adapted to the vibration groove 10. The end of the arc-shaped movable plate 3 near the outer wall of the centrifuge tank 5 is connected to the centrifuge tank... The outer walls of the centrifuge tank 5 are in contact with each other, and the through hole 19, the vibration groove 10 and the ultrasonic transducer 17 correspond to each other. The in contact arc-shaped movable plate 3 and the centrifuge tank 5 can make the ultrasonic transducer 17 on the arc-shaped movable plate 3 fit tightly in the vibration groove 10 to perform ultrasonic cleaning. The end of the rubber pad 18 near the outer wall of the centrifuge tank 5 is in contact with the outer wall of the centrifuge tank 5. The centrifuge tank 5 is located between two sets of arc-shaped movable plates 3. The two sets of arc-shaped movable plates 3 are located between two sets of support frame plates 2. The two sets of support frame plates 2 can support the arc-shaped movable plates 3.

[0028] The spectral sensor 9 can be of the Shimadzu SALD-7500nano series, TSI 3330 Optical Particle Sizer series, or TSI Model 3938 Scanning Mobility Particle Size Spectrometer series, such as... Figure 6 The sorting system flowchart shown below illustrates the specific control method as follows:

[0029] 1. Equipment initialization and parameter preset

[0030] The CNC computer 4 starts up and checks the status of each component (drive structure 6, tubular centrifuge body 1, electric cylinder 16, ultrasonic transducer 17, spectral sensor 9 calibration status, etc.). If any abnormality is detected, an alarm is triggered. Then, the operator inputs the target grading parameters (such as centrifugation speed and ultrasonic frequency for 3 size grades) and cleaning termination threshold (such as residual particle concentration ≤0.01mg / mL, or the proportion of particles of a specific size ≤1%) through the CNC computer 4. Then, the solution to be purified is injected into the centrifuge tank 5 through the inlet 8. After the liquid level reaches the target, the inlet 8 is closed.

[0031] 2. Centrifugal separation and product fractionation collection

[0032] For the first size grade, the CNC computer 4 controls the drive structure 6 to start, the tank is raised to the preset speed, and at the same time the electric cylinder 16 pushes the arc-shaped movable plate 3 to fit the tank. The ultrasonic transducer 17 is started to assist in dispersion. After centrifugation and stabilization, the outlet 11 is opened to collect the product of the corresponding grade (this stage does not rely on the spectral sensor 9, and the grading is controlled by the preset centrifugation time / speed). The separation of all size grades is completed in sequence, and finally the outlet 11 is closed.

[0033] 3. Cleaning and Residue Detection (Core Adjustment Step)

[0034] Open the residual liquid outlet 7 to drain the residual mother liquor from the tank, then close the residual liquid outlet 7. Inject cleaning fluid (such as deionized water or a special solvent) through the liquid inlet 8 until the liquid level reaches half the height of the tank. The CNC computer 4 controls the drive structure 6 to start low-speed centrifugation (e.g., 1000 r / min), while the ultrasonic transducer 17 starts (high-frequency mode, e.g., 50 kHz). Mechanical vibration combined with ultrasonic action strips away residual particles from the tank wall. After cleaning for 5-10 minutes, stop centrifugation and ultrasonication, open the residual liquid outlet 7 to drain the cleaning waste liquid. As the waste liquid flows through the residual liquid outlet 7, the spectral sensor 9 collects data in real time (detecting the size distribution and concentration of particles in the waste liquid) and transmits it to the CNC computer 4. The CNC computer 4 compares the detection results with the preset "cleaning termination threshold."

[0035] If the standard is not met: close the residual liquid outlet 7, re-inject the cleaning solution, and repeat the process of "low-speed centrifugation + ultrasonic cleaning + waste liquid discharge + testing";

[0036] Achieved: The cleaning process is deemed complete, and the process proceeds to the next stage.

[0037] If the standard is not met after three consecutive cleanings, the CNC computer will automatically alarm (there may be contamination on the inner wall of the tank or sensor malfunction) and stop the process to wait for manual intervention.

[0038] 4. End and Standby

[0039] After the cleaning meets the standards, close all valves (liquid inlet 8, residual liquid outlet 7), the electric cylinder 16 retracts to disengage the arc-shaped movable plate 3 from the tank, the equipment enters standby mode, and the CNC computer 4 generates a report on this operation (graded product quantity, number of cleaning times, final residual amount, etc.).

[0040] Through the above steps, the cleaning fluid residue is monitored in real time by the spectral sensor 9, replacing the traditional "fixed number of cleaning cycles". This ensures cleanliness while reducing unnecessary cleaning cycles, thereby improving the convenience of centrifuge cleaning. The ultrasonic transducer 17, which is telescopic and adjustable and driven by the electric cylinder 16, can dislodge the adsorbed material from the inner wall of the centrifuge tank during cleaning through low-frequency ultrasonic vibration, thereby improving the cleaning efficiency of the centrifuge tank 5. This solves the problem that existing tubular centrifuges are inconvenient to clean when used for the size classification and purification of graphene quantum dots, and that material residue is easy to remain on the inner wall of the centrifuge tank.

[0041] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A graphene quantum dot size fractionation purification centrifuge, comprising a tubular centrifuge body (1) and a centrifuge tank (5), characterized in that: It also includes a support frame plate (2) and an arc-shaped movable plate (3). The centrifuge tank (5) and drive structure (6) are installed on the main body (1) of the tubular centrifuge. Two sets of support frame plates (2) are fixedly connected to the upper edge of the main body (1) of the tubular centrifuge. Several sets of equidistant vibration grooves (10) are opened on the left and right sides of the outer wall of the centrifuge tank (5). Four sets of mounting grooves (12) are opened through the four corner edges of the left and right ends of the support frame plate (2). The mounting grooves (12) are fixed inside. An electric cylinder (16) is connected to the centrifuge tank (5) at one end of the output end of the electric cylinder (16) and the arc-shaped movable plate (3) away from the centrifuge tank (5). Several sets of equally spaced ultrasonic transducers (17) are installed through the arc-shaped movable plate (3). An outlet (11) is installed on the upper outer wall of the centrifuge tank (5). A spectral sensor (9) is installed inside the outlet (11). A CNC computer (4) is installed on the right end of the tubular centrifuge body (1) through a bracket.

2. The graphene quantum dot size fractionation purification centrifuge according to claim 1, characterized in that: The drive structure (6) is connected to the centrifuge tank (5). The lower end of the centrifuge tank (5) is equipped with a liquid inlet (8) and the lower outer wall of the centrifuge tank (5) is equipped with a residual liquid outlet (7).

3. The graphene quantum dot size fractionation purification centrifuge according to claim 1, characterized in that: A through groove (13) is provided on both the left and right ends of the support frame plate (2) near the right side of the centrifuge tank (5), and a notch (15) is provided on the upper end of the support frame plate (2) near the left side of the centrifuge tank (5).

4. The graphene quantum dot size fractionation purification centrifuge according to claim 1, characterized in that: The two sets of support plates (2) are equipped with protective covers (14) at the ends away from the centrifuge tank (5), and the protective covers (14) enclose the electric cylinder (16).

5. The graphene quantum dot size fractionation purification centrifuge according to claim 1, characterized in that: A rubber pad (18) is installed at one end of the arc-shaped movable plate (3) near the outer wall of the centrifuge tank (5). Several sets of equidistant through holes (19) are opened through the left and right ends of the rubber pad (18).

6. The graphene quantum dot size fractionation purification centrifuge according to claim 1, characterized in that: The output end of the ultrasonic transducer (17) passes through the through hole (19) and is adapted to the vibration groove (10). The end of the arc-shaped movable plate (3) close to the outer wall of the centrifuge tank (5) is attached to the outer wall of the centrifuge tank (5). The through hole (19), the vibration groove (10) and the ultrasonic transducer (17) correspond to each other.

7. The graphene quantum dot size fractionation purification centrifuge according to claim 1, characterized in that: The rubber pad (18) is attached to the outer wall of the centrifuge tank (5) at one end. The centrifuge tank (5) is located between two sets of arc-shaped movable plates (3), and the two sets of arc-shaped movable plates (3) are located between two sets of support frame plates (2).

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