CN112630239A - Continuous humidifying device for micron CT scanning and using method - Google Patents

Continuous humidifying device for micron CT scanning and using method Download PDF

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Publication number
CN112630239A
CN112630239A CN202011630240.1A CN202011630240A CN112630239A CN 112630239 A CN112630239 A CN 112630239A CN 202011630240 A CN202011630240 A CN 202011630240A CN 112630239 A CN112630239 A CN 112630239A
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liquid
scanning
handle
suction head
hose
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CN202011630240.1A
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冷艳秋
何芝远
马鹏辉
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Changan University
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Changan University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/03—Investigating materials by wave or particle radiation by transmission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/10—Different kinds of radiation or particles
    • G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
    • G01N2223/1016—X-ray

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  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pulmonology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Theoretical Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a continuous humidifying device for micron CT scanning and a use method thereof, wherein a piston button is pressed to suck liquid, a flow stopping clamp is opened, a disposable suction head is inserted into a hose, the liquid is discharged into the hose, and the piston button is continuously pressed to empty the liquid in the hose, so that the liquid is accurately transferred into a sample to finish liquid transfer; the device achieves the aims of completing sampling, humidifying and scanning three test contents by one set of device; multiple disturbances to the sample in the test process are avoided as much as possible, and the scanning data obtained by the disturbance can reflect the change condition of the microstructure in the sample humidification process more accurately.

Description

Continuous humidifying device for micron CT scanning and using method
Technical Field
The invention belongs to the field of geotechnical engineering geotechnical tests, and particularly relates to a continuous humidifying device for micron CT scanning and a using method thereof.
Background
Whether the unstable destruction problem of rock-soil body in production and construction or common geological disasters (collapse, landslide and ground cracks), a great important induction factor of the rock-soil body is the softening effect of water or other liquid on the mechanical strength of the rock-soil body after entering the rock-soil body, and the softening effect is macroscopically represented as wet collapse, wet shear and thixotropic liquefaction. Therefore, it is important to research the instability of the engineering geotechnical body and the geological disaster problem to accurately grasp how the liquid has influence on the physical structure, chemical components and stress state after entering the geotechnical body.
At present, researches on softening effect caused by water entering rock and soil mass are more, and scholars summarize the problems into water sensitivity. In contrast, some researchers focus on the change of macroscopic mechanical strength of the rock-soil mass, and others focus on how much influence is exerted on the change of the microstructure of the rock-soil mass after water enters the rock-soil mass.
Micro CT is an important tool that has been introduced into microstructure research in recent years. Compared with the traditional mercury intrusion Method (MIP) and Scanning Electron Microscope (SEM), the micron CT is a novel nondestructive detection technology. The method utilizes the principle that energy attenuation of rays in different degrees is caused when cone-shaped X-ray beams penetrate through different substances, and the X-ray intensity sensors sense the intensity of the X-ray beams passing through all parts of a sample, so that the aim of quickly and visually obtaining detailed three-dimensional structure information of the sample is fulfilled.
The container for accommodating the sample when the laboratory carries out micron CT scanning in the current stage has simple structure and poor flexibility, and is commonly provided with a plastic hollow round tube and the like. Because the openings at the two ends of the container cannot ensure that the water content of the sample is not changed in the scanning process, the obtained three-dimensional reconstruction image cannot truly reflect the microstructure characteristics of the sample under the specific water content; meanwhile, as the sample bearing container is simple, on the aspect of researching the microstructure form change of the sample under the condition of different water contents, the samples with different water contents can only be scanned in batches by utilizing a plurality of hollow circular tubes, so that not only is time-consuming, but also the microstructure change of the sample can not be continuously observed, and the specific situation that the microstructure change is caused after liquid enters the sample is difficult to clear. In conclusion, in the micron CT scanning test, the method for accurately reflecting the three-dimensional microstructure of the sample under the condition of specific water content and in the continuous humidifying process is significant in geotechnical engineering construction and geological disaster prevention and control.
Disclosure of Invention
The invention aims to solve the problem that the conventional sample bearing device cannot truly reflect the microstructure morphology of a sample under the condition of specific water content and the condition of continuous humidification, provides a continuous humidification device for micron CT scanning and a using method thereof, and can provide accurate criteria for solving the problem of unstable destruction of rock and soil mass caused by water in engineering construction and preventing and controlling geological disasters.
In order to achieve the aim, the continuous humidifying device for micron CT scanning comprises a handle, wherein a nozzle is arranged at the front part of the handle, a plunger is arranged in the handle, a first steel wire spring is sleeved on the plunger, the rear end of the plunger extends out of the handle, a nozzle push-out ring pipe is arranged at the front end of the plunger and is connected with a second steel wire spring, the nozzle push-out ring pipe extends into the nozzle, the axial surface of the nozzle push-out ring pipe is sealed with the nozzle, a disposable suction head is arranged at the front part of the nozzle and is connected with a hose, and a flow stopping clamp is arranged on the hose.
The handle is provided with a nozzle ejector which is connected with a third steel wire spring, and the third steel wire spring is connected with a nozzle ejection ring pipe.
The end of the plunger is connected with a piston button through an operating rod, a digital window is arranged on the handle, and the piston button is connected with the digital window.
The handle is provided with a handle grip, and the handle is provided with a range mark.
The plunger is sleeved with a foot piece.
The end of the disposable sucker is provided with an end cap.
A method of using a continuous humidification apparatus for micro CT scanning, comprising the steps of:
step one, mounting a disposable suction head to a nozzle to ensure good sealing;
pressing a piston button to a first stop point, extending the disposable suction head below the liquid level of the liquid, loosening the piston button, and sucking the liquid through the disposable suction head;
step three, opening a flow stopping clamp, inserting the disposable suction head into a hose, slightly pressing a piston button to a first stop point, discharging liquid in the disposable suction head into the hose, continuously pressing the piston button to a second stop point, and discharging the liquid in the hose to ensure that the liquid is accurately transferred into a sample;
and step four, drawing out the disposable suction head, closing the flow stopping clamp, and screwing the end cap to finish liquid transfer.
The piston button is rotated to adjust the pipetting range size, the range display in the digital window is observed and confirmed, and the digital display is ensured to be in the center of the window.
Compared with the prior art, the liquid is sucked by pressing the piston button, the flow stopping clamp is opened, the disposable suction head is inserted into the hose, the liquid is discharged into the hose, the piston button is continuously pressed to empty the liquid in the hose, the liquid is accurately transferred into a sample, and the liquid transfer is completed; the device achieves the aims of completing sampling, humidifying and scanning three test contents by one set of device; multiple disturbances to the sample in the test process are avoided as much as possible, and the scanning data obtained by the disturbance can reflect the change condition of the microstructure in the sample humidification process more accurately.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the flow stopping clip of the present invention; wherein, (a) is in liquid transfer, and (b) is after liquid-liquid;
wherein, 1-piston button; 2-handle shaking; 3-a handle; 4-digital window; 5-measuring range; 6-pushing out a ring pipe from a pipe nozzle; 7-disposable suction head; 8-operating lever; 9-nozzle ejector; 10-a plunger; 11-a first wire spring; 12-a foot piece; 13-a nozzle; 14-an end cap; 15-a flow stopping clip; 16-a hose; 17-a rubber plug; 18-acrylic tube; 19-sample; 20-a second wire spring; 21-third wire spring.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a continuous humidifying device for micron CT scanning comprises a handle 3, a nozzle 13 is arranged at the front part of the handle 3, a plunger 10 is arranged in the handle 3, a first steel wire spring 11 is sleeved on the plunger 10, the rear end of the plunger 10 extends out of the handle 3, a nozzle push-out ring pipe 6 is arranged at the front end of the plunger 10, the nozzle push-out ring pipe 6 is connected with a second steel wire spring 20, the nozzle push-out ring pipe 6 extends into the nozzle 13, the axial surface of the nozzle push-out ring pipe 6 is sealed with the nozzle 13, a disposable suction head 7 is arranged at the front part of the nozzle 13, the disposable suction head 7 is connected with a hose 16, and a flow stopping. The handle 3 is provided with a nozzle ejector 9, the nozzle ejector 9 is connected with a third steel wire spring 21, and the third steel wire spring 21 is connected with a nozzle ejection ring pipe 6. The end of the plunger 10 is connected with the piston button 1 through the operating rod 8, the handle 3 is provided with a digital window 4, and the piston button 1 is connected with the digital window 4. The handle 3 is provided with a handle grip 2, and the handle 3 is provided with a range 5 mark. The plunger 10 is sleeved with a foot 12. The end of the disposable tip 7 is provided with an end cap 14.
Referring to fig. 1, the pipette part is mainly composed of six components from inside to outside.
The first group of components is composed of a plunger 10 with a thick upper part and a thin lower part, and two groups of first steel wire springs 11 and second steel wire springs 20 with the outer diameters being one larger and one smaller, and the first group of components and the second group of components are used for generating negative pressure inside the pipette by utilizing the compression characteristics of the two springs so as to suck liquid.
The second group of components are a foot piece 12 and a nozzle 13, the foot piece 12 is sleeved outside a thin rod at the lower part of the plunger 10, negative pressure is generated inside the nozzle 13 when a third wire spring 21 outside the upper plunger 10 is compressed, and the negative pressure disappears gradually when the third wire spring 21 rebounds, so that liquid is sucked into the pipette.
The third group of components is a disposable suction head 7 with scales, the disposable suction head 7 is connected with a nozzle 13 through tight friction, liquid sucked by the liquid suction device is stored in the suction head 7, the disposable suction head 7 is required to be replaced every time a liquid suction and drainage process is completed, and the influence on test results caused by the mixing of the sucked liquid for many times is avoided.
The fourth group of components is a nozzle push-out ring pipe 6, and the function of the fourth group of components is to automatically push out the disposable suction head 7 through the displacement of the nozzle push-out ring pipe 6, so that the direct contact between the skin of a human body and the disposable suction head 7 possibly stained with corrosive liquid is avoided.
The fifth group of components consists of a piston button 1, a handle grip 2, a handle 3, a digital window 4, a range 5 and an operating rod 8, and mainly plays roles of adjusting the liquid inhalation dosage and controlling liquid inhalation and discharge, wherein the piston button 1 is provided with two stop points so as to be convenient for fully discharging the liquid in the disposable suction head 7, the range 5 represents that the volume of the inhaled liquid is within the range of 0.5-10 mu L, and the volume of the currently inhaled liquid can be observed by rotating the piston button 1 in the digital window 4.
The sixth set of members comprises a nozzle ejector 9 and a wire spring 11, which are snap-locked in connection with the nozzle ejector collar 6, the wire spring 11 being compressed when the nozzle ejector 9 is pressed, the nozzle ejector collar 6 connected thereto being pushed downwards out of the disposable tip 7.
The liquid migration part is composed of an end cap 14, a flow stopping clip 15 and a hose 16. The end cap 14 can protect the inner wall of the hose 16 from being cleaned when the liquid is not needed to be transferred, the flow stopping clamp 15 can be opened and closed to control the liquid transfer according to the requirement, the hose 16 with the inner diameter of 1mm and the length of 10mm can ensure that a large amount of liquid is not accumulated in the hose 16, and the liquid in the hose 16 is completely discharged when the piston button 1 is squeezed for the second time.
The sample bearing cylinder part mainly comprises two rubber plugs 17, an acrylic tube 18 and a sample 19. The two rubber plugs 17 are convenient for sampling and removing samples, and simultaneously, the liquid in the sample 19 can not be evaporated outwards in the process of pipetting; the transparent acrylic tube 18 outer wall of internal diameter 5mm, height 30mm is carved with the scale that the range is 1mm will be convenient for calculate the volume of intraductal sample 19, combines sample moisture content and dry density alright calculate sample 19 quality again, can calculate the volume that needs added liquid according to concrete demand from this, utilizes the pipettor to implement accurate pipetting.
Example (b):
the specific implementation steps are described by taking micron CT scanning of the continuously humidified loess as an example:
1. cutting loess block to obtain a volume of not less than 10cm3Removing surface floating soil and sharp edges and corners of the representative cubic sample, and leveling the top and bottom surfaces of the sample;
2. slowly pressing an acrylic tube 18 into a representative sample, observing the scale of the tube wall, taking out a sample 19 with the height not more than 20mm, recording the actual height h of the sample 19 in the tube, trowelling the redundant soil sample below the sample 19 by using a knife, and then screwing the upper and lower rubber plugs 17;
3. collecting the residual loess sample according to GB/T50123-The natural density rho and the dry density rho of the material are measured by a chemical test method standarddAnd the water content w;
4. calculate the dry soil mass M of the sample 19 inside the acrylic tube 18s＝Πr2hρdAssuming that the moisture content gradient is a%, the total humidification is performed for b times, and the mass of the liquid required for one humidification is calculated as Mw＝0.01aMsVolume is Vw＝0.01aρwMs；
5. Rotating piston button 1 to adjust pipetting range 5 to VwThe size is that the range display in the digital window 4 is observed and confirmed to ensure that the number is displayed in the center of the window;
6. the disposable sucker 7 is pressed and firmly installed to the nozzle 13, so that good sealing is ensured;
7. pressing the piston button 1 to a first stop point, immersing the disposable sucker 7 into the liquid level of the prepared liquid for 2-3mm, slightly loosening the piston button 1, lifting the disposable sucker 7 and stopping on the wall of the container to remove the redundant liquid;
8. unscrewing the end cap 14, opening the flow stopping clamp 15, slowly inserting the disposable suction head 7 into the hose 16, slightly pressing the piston button 1 to a first stop point to discharge liquid in the disposable suction head 7 into the hose 16, continuously pressing the piston button 1 to a second stop point to discharge the liquid in the hose 16, and ensuring that the liquid is accurately transferred into the sample 19;
9. slowly drawing out the disposable sucker 7, closing the flow stopping clamp 15 and screwing the end cap 14;
10. pressing the nozzle ejector 9 to eject the disposable tip 7 and discard it to a waste container;
11. putting the transfer-finished acrylic tube 18 and the internal sample 19 into a moisturizing cylinder to wait for the liquid to be sufficiently transported;
12. after the liquid is transported, placing the acrylic tube 18 in the center of a micro CT objective table, starting to perform micro CT scanning, after the scanning is finished, performing three-position microstructure reconstruction by utilizing avizo software after scanning data, and observing and counting microstructure characteristics in the sample 19;
13. taking out the acrylic tube 18, and repeating the steps of 5-12 until the humidification is completed for b times;
14. after the test is finished, the end cap 14 is unscrewed, the flow stopping clamp 15 is opened, the rubber plug 17 is unscrewed, the acrylic tube 18 and all parts are washed by distilled water, and after the washing is finished, the acrylic tube is placed into an oven to be dried for the next use.
The specific implementation steps can be summarized as follows: sampling was performed by using an acrylic tube 18, and the basic physical properties (ρ, ρ) of the sample 19 were measureddW) calculating the liquid volume required by single pipetting, adjusting the range of the pipettor according to the requirement and sucking the calculated liquid volume; unscrewing the end cap 14, opening the flow stopping clamp 15, inserting the disposable suction head 7 into the hose 16, pushing the piston button 1 twice to ensure that no liquid remains in the disposable suction head 7 and the hose 16, and ensuring that the liquid enters the sample 19; pulling out the suction head 7, closing the flow stopping clamp 15 and abandoning the disposable suction head 7; placing the sample 19 into a micron CT objective table for scanning, and repeating the steps according to the specific humidification times until the test is finished; finally, all the parts are cleaned to complete all the tests.

Claims (8)

1. The utility model provides a continuous humidification device for micron CT scanning, characterized in that, including handle (3), handle (3) front portion is provided with mouthpiece (13), be provided with plunger (10) in handle (3), the cover is equipped with first wire spring (11) on plunger (10), the rear end of plunger (10) stretches out handle (3), plunger (10) front end is provided with mouthpiece release ring canal (6), second wire spring (20) is connected in mouthpiece release ring canal (6), mouthpiece release ring canal (6) stretch into mouthpiece (13), mouthpiece release ring canal (6) axial plane is sealed with mouthpiece (13), mouthpiece (13) front portion is provided with disposable suction head (7), disposable suction head (7) connecting hose (16), be provided with on hose (16) and end the clamp (15).
2. The continuous humidifying device for micro CT scanning as recited in claim 1, wherein the handle (3) is provided with a nozzle ejector (9), the nozzle ejector (9) is connected with a third wire spring (21), and the third wire spring (21) is connected with the nozzle ejector ring tube (6).
3. The continuous humidifying device for micro CT scanning as recited in claim 1, wherein the end of the plunger (10) is connected with the piston button (1) through the operating rod (8), the handle (3) is provided with the digital window (4), and the piston button (1) is connected with the digital window (4).
4. The continuous humidifying device for micro CT scanning as recited in claim 1, wherein a handle grip (2) is arranged on the handle (3), and a range (5) mark is arranged on the handle (3).
5. A continuous humidification apparatus for micro CT scanning according to claim 1 wherein the plunger (10) is fitted with a foot (12).
6. A continuous humidification device for micro CT scanning according to claim 1 characterized in that the end of the disposable tip (7) is provided with an end cap (14).
7. The method of using a continuous humidification apparatus for micro CT scanning as claimed in claim 1, comprising the steps of:
step one, a disposable suction head (7) is arranged at a nozzle (13) to ensure good sealing;
step two, pressing the piston button (1) to a first stop point, extending the disposable suction head (7) below the liquid level, loosening the piston button (1), and sucking liquid through the disposable suction head (7);
step three, opening a flow stopping clamp (15), inserting the disposable suction head (7) into a hose (16), slightly pressing a piston button (1) to a first stop point, discharging liquid in the disposable suction head (7) into the hose (16), continuously pressing the piston button (1) to a second stop point, and discharging the liquid in the hose (16) to ensure that the liquid is accurately transferred into a sample (19);
and step four, drawing out the disposable suction head (7), closing the flow stopping clamp (15), and screwing the end cap (14) to finish liquid transfer.
8. The use method of the continuous humidifying device for micro CT scan according to claim 7, characterized in that the piston button (1) is rotated to adjust the pipetting range size, the range display in the digital window (4) is observed and confirmed, and the digital display is ensured to be in the center of the window.
CN202011630240.1A 2020-12-30 2020-12-30 Continuous humidifying device for micron CT scanning and using method Pending CN112630239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011630240.1A CN112630239A (en) 2020-12-30 2020-12-30 Continuous humidifying device for micron CT scanning and using method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011630240.1A CN112630239A (en) 2020-12-30 2020-12-30 Continuous humidifying device for micron CT scanning and using method

Publications (1)

Publication Number Publication Date
CN112630239A true CN112630239A (en) 2021-04-09

Family

ID=75289801

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011630240.1A Pending CN112630239A (en) 2020-12-30 2020-12-30 Continuous humidifying device for micron CT scanning and using method

Country Status (1)

Country Link
CN (1) CN112630239A (en)

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