Particle size detection device for lignin nanoparticles

Abstract

The utility model discloses a particle size detection device for lignin nanoparticles, and relates to the technical field of nanoparticle physical property detection. The particle size detection device for lignin nanoparticles comprises: a base; the dispersing box is fixedly arranged on the base, and an ultrasonic transducer for dispersing lignin particles is fixedly arranged on the surface of the dispersing box; the conveying pipe is fixedly communicated with one side of the dispersion box, the other end of the conveying pipe is communicated with a detection mechanism used for detecting the particle size, and the detection mechanism comprises a detection camera obscura fixedly arranged on the base. According to the particle size detection device for the lignin nanoparticles, by arranging the dispersion box, the buffer mechanism, the detection mechanism and the filtering mechanism, sample dispersion, filtering, constant-temperature pretreatment and laser detection are integrated, manual intervention is not needed, errors caused by separation of pretreatment and detection are effectively avoided, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of nanoparticle physical property detection technology, specifically a particle size detection device for lignin nanoparticles. Background Technology

[0002] As a renewable green material, lignin nanoparticles are widely used in fields such as biomedicine, environmental adsorption, and composite materials. Their particle size and distribution directly determine their application performance, so quality control needs to be achieved through precise testing.

[0003] Currently, the particle size detection of lignin nanoparticles requires manual ultrasonic dispersion and filtration to remove impurities. This process is cumbersome and the pretreatment effect is unstable, leading to a disconnect between pretreatment and detection, which reduces detection efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a particle size detection device for lignin nanoparticles to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a particle size detection device for lignin nanoparticles, comprising: a base; a dispersion box fixedly mounted on the base, wherein an ultrasonic transducer for dispersing lignin particles is fixedly mounted on the surface of the dispersion box; a conveying pipe fixedly connected to one side of the dispersion box, wherein the other end of the conveying pipe is connected to a detection mechanism for detecting particle size, the detection mechanism comprising: a detection dark box fixedly mounted on the base; a sample cell detachably mounted inside the detection dark box, wherein a gap is provided between the sample cell and the bottom surface of the detection dark box; a laser generator fixedly mounted on the top surface of the detection dark box; a laser receiver fixedly mounted on the bottom surface of the detection dark box; a filtering mechanism connected to the conveying pipe, wherein the filtering mechanism is used to intercept impurities; and a buffer mechanism connected to the conveying pipe, wherein the buffer mechanism is located between the filtering mechanism and the detection mechanism.

[0006] Preferably, the filtration mechanism includes: an installation tube fixedly connected to the conveying pipe, the installation tube being vertically arranged; a sealing cap threaded onto the top and bottom ends of the installation tube; and a filter sleeve inserted inside the installation tube, the two ends of the filter sleeve respectively abutting against the surfaces of the two sealing caps, the filter sleeve being in the shape of an inclined cylinder, with its inclined opening facing the feed inlet of the conveying pipe, and impurities in the material being intercepted when the conveying pipe is configured to feed material.

[0007] Preferably, it further includes: a rotating frame rotatably mounted on a sealing cover located at the top; and a cleaning brush detachably mounted on the side of the rotating frame, the surface of the cleaning brush being in contact with the inner surface of the filter sleeve, wherein when the rotating frame is rotated, the cleaning brush slides along the inner surface of the filter sleeve to clean the impurities attached to the filter sleeve.

[0008] Preferably, it further includes: a limiting strip, fixedly disposed on the surface of the filter sleeve; a limiting groove, formed on the inner surface of the mounting tube, wherein the outer surface of the limiting strip is slidably disposed with the inner surface of the limiting groove; a motor, fixedly disposed on the sealing cover located at the top, wherein the output end of the motor is driven by the shaft end of the rotating frame; and a pressure sensor, fixedly disposed on the conveying pipe, wherein the detection end of the pressure sensor is located inside the conveying pipe, and the pressure sensor is located on both sides of the mounting tube.

[0009] Preferably, the buffer mechanism includes: a buffer box, which is connected to the conveying pipe; a circular groove, which is formed on the bottom surface inside the buffer box, and a rotor is arranged inside the circular groove; an electromagnetic generator, which is fixedly arranged at the bottom of the buffer box, and the electromagnetic generator is set to rotate the rotor when running, so that the buffer material is stirred; and a constant temperature jacket, which is fitted on the buffer box.

[0010] Preferably, it further includes: a slider, fixedly disposed on both sides of the sample cell; a sliding sleeve, fixedly disposed on both sides of the inner side wall of the detection dark chamber, the outer surface of the slider being slidably disposed with the inside of the sliding sleeve; and a thermo-humidifier, disposed on the detection dark chamber, the output end and input end of the thermo-humidifier being connected to the inside of the detection dark chamber.

[0011] Preferably, it further includes: a temperature sensor, fixedly mounted on the dispersion box, the detection end of the temperature sensor being located inside the dispersion box; and a pump, connected to the conveying pipe, the pump being located on one side of the dispersion box and between the buffer mechanism and the detection mechanism.

[0012] This invention provides a particle size detection device for lignin nanoparticles, which has the following beneficial effects:

[0013] (1) This utility model integrates sample dispersion, filtration, constant temperature pretreatment and laser detection by setting up a dispersion box, buffer mechanism, detection mechanism and filtration mechanism. No manual intervention is required, which effectively avoids the error caused by the disconnect between pretreatment and detection and improves detection efficiency.

[0014] (2) By setting up the installation pipe, filter sleeve and sealing cover, the impurities inside the dispersed material are directly intercepted and stored during the transportation process. When the filter sleeve needs to be cleaned, it can be taken out and cleaned directly after the sealing cover is removed, which improves the cleaning efficiency. Furthermore, by setting up the rotating frame and cleaning brush, the filter sleeve can be continuously cleaned during the detection process, so that the filter sleeve cannot be blocked by debris, thus improving the detection effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall internal structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the detection dark box of this utility model;

[0018] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of the structure of region A in the middle;

[0019] Figure 5 This is an exploded view of the internal structure of the mounting tube of this utility model.

[0020] In the diagram: 1. Base; 2. Dispersion box; 3. Ultrasonic transducer; 4. Delivery pipe; 5. Buffer mechanism; 51. Buffer box; 52. Thermostatic jacket; 53. Circular groove; 54. Rotor; 55. Electromagnetic generator; 6. Detection mechanism; 61. Detection dark box; 62. Sample cell; 63. Laser generator; 64. Laser receiver; 65. Sliding bar; 66. Sliding sleeve; 67. Thermostatic and humidifier; 7. Filter mechanism; 71. Mounting pipe; 72. Filter sleeve; 73. Sealing cover; 74. Rotating frame; 75. Cleaning brush; 76. Limiting bar; 77. Limiting groove; 78. Motor; 8. Temperature sensor; 9. Pump; 10. Pressure sensor. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] The present invention provides a technical solution: (Refer to...) Figures 1-5In this embodiment, a particle size detection device for lignin nanoparticles includes: a base 1, which is formed by welding steel plate and coated with epoxy resin after sandblasting and rust removal; a dispersion box 2, fixedly mounted on the base 1, which is made of high borosilicate glass and has a stainless steel fixing bracket on its surface, fixed to the base 1 by bolts; an ultrasonic transducer 3 for dispersing lignin particles, which is made of piezoelectric ceramic and distributed circumferentially on the outer wall of the dispersion box 2; and a conveying pipe 4, fixedly connected to one side of the dispersion box 2, which is made of PTFE, resistant to chemical corrosion and has a smooth inner wall to reduce lignin particle adsorption; and a detection mechanism 6 for detecting particle size, which is connected to the other end of the conveying pipe 4. The detection mechanism 6 includes:

[0023] The detection dark box 61 is fixedly mounted on the base 1; the sample cell 62 is detachably mounted inside the detection dark box 61. The sample cell 62 is made of quartz and its inner wall is coated with a polytetrafluoroethylene anti-adsorption coating. There is a gap between the sample cell 62 and the bottom surface of the detection dark box 61; the laser generator 63 is fixedly mounted on the top surface inside the detection dark box 61. The laser generator 63 is a helium-neon laser; the laser receiver 64 is fixedly mounted on the bottom surface inside the detection dark box 61. The laser receiver 64 is a photomultiplier tube and is coaxially aligned with the laser generator 63.

[0024] The filter mechanism 7 is connected to the conveying pipe 4 and is used to intercept impurities.

[0025] The buffer mechanism 5 is connected to the delivery pipe 4 and is located between the filter mechanism 7 and the detection mechanism 6.

[0026] The filtration mechanism 7 includes: an installation pipe 71, which is fixedly connected to the conveying pipe 4 and is vertically installed; a sealing cover 73, which is threaded onto the top and bottom of the installation pipe 71 and is made of stainless steel with a silicone rubber sealing gasket on its inner surface to ensure no leakage after installation; and a filter sleeve 72, which is inserted into the installation pipe 71 and whose two ends abut against the surfaces of the two sealing covers 73 respectively. The filter sleeve 72 is shaped like a sloping cylinder with its inclined opening facing the feed inlet of the conveying pipe 4. When the conveying pipe 4 is set to feed material, impurities in the material are intercepted. The filter sleeve 72 is made of polypropylene and has a 30° cone angle. The inclined opening design increases the filtration area and reduces impurity accumulation.

[0027] It also includes: a rotating frame 74, which is rotatably mounted on the top sealing cover 73. The rotating frame 74 is made of aluminum alloy and is rotatably connected to the sealing cover 73 via a deep groove ball bearing; and a cleaning brush 75, which is detachably mounted on the side of the rotating frame 74. The surface of the cleaning brush 75 is in contact with the inner surface of the filter sleeve 72. When the rotating frame 74 is rotated, the cleaning brush 75 slides along the inner surface of the filter sleeve 72 to clean the impurities attached to the filter sleeve 72. The bristles of the cleaning brush 75 are made of nylon and are detachably connected to the rotating frame 74 via a snap fastener for easy replacement. The pressure between the bristles and the inner surface of the filter sleeve 72 is small to avoid damaging the filter membrane.

[0028] It also includes: a limiting strip 76, fixedly installed on the surface of the filter sleeve 72, the limiting strip 76 is made of stainless steel, symmetrically arranged on both sides of the filter sleeve 72, and cooperates with the limiting groove 77 to prevent the filter sleeve 72 from rotating; the limiting groove 77 is opened on the inner surface of the mounting tube 71, and the outer surface of the limiting strip 76 slides with the inner surface of the limiting groove 77; a motor 78, fixedly installed on the sealing cover 73 located at the top, and the output end of the motor 78 is driven by the shaft end of the rotating frame 74; a pressure sensor 10, fixedly installed on the conveying tube 4, the detection end of the pressure sensor 10 is located inside the conveying tube 4, the pressure sensor 10 is located on both sides of the mounting tube 71, the pressure sensor 10 is a diffused silicon type, the detection end is made of polytetrafluoroethylene, which does not react with the material, and monitors the pressure difference before and after filtration in real time. When the difference exceeds the specified range, it prompts to clean the filter sleeve 72.

[0029] The buffer mechanism 5 includes: a buffer box 51, connected to the conveying pipe 4, the buffer box 51 is made of stainless steel with a polished inner wall to reduce particle adsorption; a circular groove 53, formed on the bottom surface inside the buffer box 51, with a rotor 54 inside the circular groove 53, the rotor 54 is a neodymium iron boron permanent magnet with a polytetrafluoroethylene coating on the surface, which is corrosion resistant and magnetically stable; an electromagnetic generator 55, fixedly installed at the bottom of the buffer box 51, the electromagnetic generator 55 is a high-frequency electromagnetic coil, which drives the rotor 54 to rotate through electromagnetic induction to achieve continuous stirring of materials and prevent particle sedimentation. When the electromagnetic generator 55 is set to run, the rotor 54 rotates to stir the buffered materials; and a constant temperature jacket 52, fitted onto the buffer box 51, the constant temperature jacket 52 is made of stainless steel, with a spiral flow channel inside, connected to a constant temperature water bath to maintain the temperature of the materials inside the buffer box 51.

[0030] It also includes: a slider 65, which is fixedly installed on both sides of the sample cell 62; a sliding sleeve 66, which is fixedly installed on both sides of the inner side wall of the detection dark chamber 61, with the outer surface of the slider 65 slidingly installed with the inside of the sliding sleeve 66; and a thermo-humidifier 67, which is installed on the detection dark chamber 61, with both the output and input ends of the thermo-humidifier 67 connected to the inside of the detection dark chamber 61.

[0031] It also includes: a temperature sensor 8, which is fixedly installed on the dispersion box 2. The detection end of the temperature sensor 8 is located inside the dispersion box 2 to monitor the material temperature in real time during ultrasonic dispersion, so as to avoid changes in the lignin structure caused by high temperature; and a pump 9, which is connected to the conveying pipe 4. The pump 9 is located on one side of the dispersion box 2 and between the buffer mechanism 5 and the detection mechanism 6.

[0032] This invention provides a particle size detection device for lignin nanoparticles, the specific working principle of which is as follows:

[0033] In use, the coarse dispersion of lignin nanoparticles is injected into the dispersion box 2, the ultrasonic transducer 3 is activated, and the temperature sensor 8 monitors the material temperature in real time. After dispersion, the pump 9 is activated, and the material enters the filtration mechanism 7 through the conveying pipe 4. The filter sleeve 72 intercepts agglomerates and impurities. At the same time, the motor 78 drives the rotating frame 74 to rotate the cleaning brush 75, continuously cleaning the inner surface of the filter sleeve 72 to prevent clogging. The pressure sensor 10 monitors the pressure difference before and after filtration in real time to ensure smooth filtration. The filtered material enters the buffer mechanism 5, where the constant temperature jacket 52 maintains the material temperature at 25°C. The electromagnetic generator 55 drives the rotor 54 to rotate and stir to prevent particle sedimentation. Subsequently, the material enters the sample cell 62 in the detection dark box 61 through the conveying pipe 4. The laser generator 63 emits a laser that penetrates the material in the sample cell 62. The laser receiver 64 collects the scattered signal and converts it into an electrical signal, which is transmitted to an external data processor to calculate and output the particle size distribution curve, Z-average particle size, and polydispersity index. After the test is completed, turn off the equipment, pull out the sample cell 62 through the slide bar 65 for cleaning, unscrew the sealing cover 73 of the filter mechanism 7, take out the filter sleeve 72 to clean impurities, and run the material pump 9 in reverse to flush the pipeline with cleaning solution to ensure the equipment is clean and ready for the next use.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A particle size detection device for lignin nanoparticles, characterized in that, include: Base (1); Dispersion box (2), fixedly mounted on base (1), wherein an ultrasonic transducer (3) for dispersing lignin particles is fixedly mounted on the surface of the dispersion box (2). A conveying pipe (4) is fixedly connected to one side of the dispersion box (2), and the other end of the conveying pipe (4) is connected to a detection mechanism (6) for detecting particle size. The detection mechanism (6) includes: The detection dark box (61) is fixedly installed on the base (1); The sample cell (62) is detachably installed inside the detection dark box (61), and a gap is provided between the sample cell (62) and the bottom surface of the detection dark box (61). A laser generator (63) is fixedly installed on the top surface inside the detection dark box (61); A laser receiver (64) is fixedly installed on the bottom surface inside the detection dark box (61); A filter mechanism (7) is connected to the conveying pipe (4) and is used to intercept impurities; A buffer mechanism (5) is connected to the delivery pipe (4) and is located between the filter mechanism (7) and the detection mechanism (6).

2. The particle size detection device for lignin nanoparticles according to claim 1, characterized in that: The filtration mechanism (7) includes: The mounting pipe (71) is fixedly connected to the conveying pipe (4), and the mounting pipe (71) is set vertically; A sealing cap (73) is threaded onto the top and bottom of the mounting tube (71); The filter sleeve (72) is inserted inside the mounting tube (71). The two ends of the filter sleeve (72) abut against the surfaces of the two sealing caps (73). The filter sleeve (72) is shaped like a sloping cylinder with its inclined opening facing the feed inlet of the conveying pipe (4). When the conveying pipe (4) is set to feed, impurities in the material are intercepted.

3. The particle size detection device for lignin nanoparticles according to claim 2, characterized in that: Also includes: The rotating bracket (74) is rotatably mounted on the sealing cover (73) located at the top; A cleaning brush (75) is detachably mounted on the side of a rotating frame (74). The surface of the cleaning brush (75) is in contact with the inner surface of the filter sleeve (72). When the rotating frame (74) is rotated, the cleaning brush (75) slides along the inner surface of the filter sleeve (72) so that the impurities attached to the filter sleeve (72) are cleaned.

4. The particle size detection device for lignin nanoparticles according to claim 3, characterized in that: Also includes: The limiting strip (76) is fixedly installed on the surface of the filter sleeve (72); A limiting groove (77) is formed on the inner surface of the mounting tube (71), and the outer surface of the limiting strip (76) is slidably disposed with respect to the inner surface of the limiting groove (77); The motor (78) is fixedly mounted on the sealing cover (73) located at the top, and the output end of the motor (78) is connected to the shaft end of the rotating frame (74) for transmission. A pressure sensor (10) is fixedly installed on the delivery pipe (4). The detection end of the pressure sensor (10) is located inside the delivery pipe (4), and the pressure sensor (10) is located on both sides of the mounting pipe (71).

5. The particle size detection device for lignin nanoparticles according to claim 1, characterized in that: The caching mechanism (5) includes: The buffer box (51) is connected to the conveying pipe (4); A circular groove (53) is formed on the bottom surface inside the buffer box (51), and a rotor (54) is provided inside the circular groove (53). An electromagnetic generator (55) is fixedly installed at the bottom of the buffer box (51). When the electromagnetic generator (55) is running, the rotor (54) rotates to stir the buffer material. A constant temperature jacket (52) is fitted onto the buffer box (51).

6. The particle size detection device for lignin nanoparticles according to claim 1, characterized in that: Also includes: Slide bar (65) is fixedly installed on both sides of sample cell (62); The sliding sleeve (66) is fixedly installed on both sides of the inner side wall of the detection dark box (61), and the outer surface of the slide bar (65) is slidably installed with the inside of the sliding sleeve (66); A constant temperature and humidity device (67) is installed on the detection dark box (61). The output and input terminals of the constant temperature and humidity device (67) are both connected to the inside of the detection dark box (61).

7. The particle size detection device for lignin nanoparticles according to claim 5, characterized in that: Also includes: A temperature sensor (8) is fixedly mounted on the dispersion box (2), and the detection end of the temperature sensor (8) is located inside the dispersion box (2); A material pump (9) is connected to the conveying pipe (4). The material pump (9) is located on one side of the dispersion box (2) and between the buffer mechanism (5) and the detection mechanism (6).

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