Sample preparation device for nanometer silica sol solidified sandy soil corresponding to triaxial apparatus

Abstract

The utility model relates to the technical field of mechanical test devices of building materials, and discloses a sample preparation device for a triaxial apparatus corresponding to nano silica sol solidified sandy soil, the sample preparation device comprises a base, a tubular mold is nested and connected above the base, the base comprises a cylinder nesting part, a through type round hole, a cylinder bearing platform and a cylinder support, a cylindrical bearing platform is fixedly connected to the upper portion of the cylindrical support, a cylindrical nesting part is connected to the upper portion of the cylindrical bearing platform, a through type round hole is formed in the cylindrical nesting part, the cylindrical nesting part is nested with a tubular mold, and the base and the tubular mold are connected with a peristaltic pump rubber tube. According to the device, under the condition that a liquid curing agent reinforces sandy soil, integrated forming of a triaxial apparatus test sample can be achieved, the influence of liquid in a triaxial apparatus on the curing agent is avoided, the sample curing process can be conducted without the triaxial apparatus, and the sample preparation efficiency and stability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical testing devices for building materials, and in particular to a sample preparation device for a triaxial instrument corresponding to nano-silica sol-solified sand. Background Art

[0002] When conducting research on the mechanical properties of soil, we often need to use a triaxial apparatus for experiments, and nano-silica sol solidification of sand is one of the cases. This device realizes the separate sample preparation from the triaxial apparatus when a liquid solidifying agent such as nano-silica sol solidifies sand, and realizes the function of directly completing the sample preparation in the rubber membrane required for the triaxial apparatus sample, and forming it in one piece.

[0003] In geotechnical tests, sample preparation is one of the steps in triaxial testing of cylindrical specimens. Especially for sandy soil, sample preparation is often difficult when adding liquid curing agents such as nano-silica sol. If the operation is not done properly, the soil sample is likely to be damaged. Since nano-silica sol is a liquid curing agent, the traditional method of directly preparing samples on the triaxial instrument will cause problems such as instrument contamination and clogging of instrument pipelines when dealing with this situation. In addition, since nano-silica sol has a certain curing time, preparing samples on the instrument will reduce the instrument utilization rate, which is a waste of scientific research resources.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the application and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present invention is to provide a sample preparation device for a triaxial instrument corresponding to nano-silica sol-solidified sand, which can be separated from the triaxial instrument for sample preparation, and there is no need to insert the rubber film required by the triaxial instrument after the sample is solidified, thereby avoiding possible damage to the sample when the rubber film is inserted, ensuring the reliability of the experimental results, and improving the efficiency of the instrument.

[0006] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions:

[0007] A sample preparation device for a triaxial instrument corresponding to nano-silica sol-solified sand comprises a base, a tubular mold is nested and connected above the base, the base comprises a cylindrical nesting part, a through-type circular hole, a cylindrical pedestal and a cylindrical support, a cylindrical pedestal is fixedly connected above the cylindrical support, a cylindrical nesting part is connected above the cylindrical pedestal, a through-type circular hole is provided inside the cylindrical nesting part, the cylindrical nesting part is nested with the tubular mold, the through-type circular hole is connected to the inside of the tubular mold, nano-silica sol is input through the through-type circular hole, the cylindrical nesting part is covered with a sample preparation rubber film, and the other end of the sample preparation rubber film is flanged and sleeved on the tubular mold.

[0008] Optionally, a circular hole with rounded bottom corners is provided at the bottom of the base to facilitate the base to be connected to a peristaltic pump rubber tube.

[0009] Optionally, the tubular mold comprises a tubular sample-making sleeve and a drainage groove, the tubular sample-making sleeve is nested with the cylindrical nesting portion, and the drainage groove is obliquely surrounded by the tubular sample-making sleeve.

[0010] Optionally, a drain outlet for collecting and draining overflowed waste liquid is provided at the lowest point of the drain trough.

[0011] Optionally, the tubular mold is provided with a rounded corner at the bottom of the sleeve to facilitate connection with the base when nested with the base.

[0012] Optionally, after the tubular sample preparation sleeve is nested, the internal space size is the same as the required size of the sample.

[0013] Optionally, the through circular hole passes through the base from a vertical geometric center point.

[0014] Optionally, the through-type circular hole of the base and the tubular mold are connected with a peristaltic pump rubber hose, the peristaltic pump rubber hose is connected with an output end of an external peristaltic pump, and the input end of the external peristaltic pump is connected to the nano-silica sol through the peristaltic pump rubber hose.

[0015] Optionally, a circular fine-pore nylon mesh is provided on the upper portion of the cylindrical nesting portion.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The function of preparing samples separately from the triaxial instrument is realized when the liquid curing agent such as nano-silica sol is used to solidify the sand, thus avoiding the instrument contamination caused by the direct contact between the curing agent and the triaxial instrument. The function of forming the sample in one piece is realized directly in the rubber film required by the triaxial instrument sample. The prepared sample can be directly used in the test operation of the triaxial instrument, which is highly practical.

[0018] The nano-silica sol was able to penetrate the sand sample from bottom to top, thus improving the saturation state and uniformity of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1It is a three-dimensional schematic diagram of a sample preparation device corresponding to a triaxial apparatus for nano-silica sol-solified sand in the utility model;

[0021] Figure 2 It is a top view of a sample preparation device corresponding to a triaxial instrument for nano-silica sol-solified sand in the utility model;

[0022] Figure 3 It is a nested schematic diagram of a sample preparation device corresponding to a triaxial apparatus for nano-silica sol-solified sand in the utility model;

[0023] Figure 4 This is a sample preparation schematic diagram of a sample preparation device corresponding to a triaxial instrument for nano-silica sol-solified sand in the utility model;

[0024] Figure 5 The utility model is a schematic diagram of a circular fine-pore nylon mesh of a sample preparation device corresponding to a triaxial instrument for nano-silica sol-solified sand.

[0025] Description of reference numerals:

[0026] 1. Cylinder nesting part; 2. Through-type circular hole; 3. Cylinder base; 4. Rounded corners at the bottom of the circular hole; 5. Cylinder support; 6. Tubular sample sleeve; 7. Drainage trough; 8. Rounded corners at the bottom of the sleeve; 9. Base; 10. Tubular mold; 11. External peristaltic pump; 12. Peristaltic pump rubber tube; 13. Nano-silica sol; 14. Sample rubber membrane; 15. Circular fine-pore nylon mesh. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Example

[0028] A sample preparation device for a triaxial apparatus for nano-silica sol-solified sand, such as Figure 2 and Figure 4 As shown, it includes a base 9, and a tubular mold 10 is nested and connected on the top of the base 9. The base 9 includes a cylindrical nesting part 1, a through-type circular hole 2, a cylindrical base 3 and a cylindrical support 5. The cylindrical support 5 is fixedly connected with the cylindrical base 3, and the cylindrical nesting part 1 is connected on the top of the cylindrical base 3. The cylindrical nesting part 1 is provided with a through-type circular hole 2 inside, the cylindrical nesting part 1 is nested with the tubular mold 10, the through-type circular hole 2 is connected to the inside of the tubular mold 10, and the nano-silica sol is input through the through-type circular hole 2. The cylindrical nesting part 1 is covered with a sample-preparing rubber film 14, and the other end of the sample-preparing rubber film 14 is flanged and sleeved on the tubular mold 10.

[0029] First, test sand is placed in layers in the sample preparation rubber film 14, and then the nano-silica sol 13 is sucked into the external peristaltic pump 11, and then the external peristaltic pump 11 sends the nano-silica sol 13 into the tubular mold 10 through the peristaltic pump rubber tube 12, and the nano-silica sol 13 overflows the tube mouth, and this state is maintained for a period of time to wait for the nano-silica sol 13 to gel and form a sample, and the triaxial instrument is separated for sample preparation. There is no need to put the rubber film required by the triaxial instrument after the sample is solidified, which avoids the damage to the sample that may be caused when the rubber film is put in, ensures the reliability of the experimental results, and improves the efficiency of the instrument.

[0030] like Figure 1 As shown, the bottom of the base 9 is provided with a round hole bottom corner 4 to facilitate the base 9 to be connected to the peristaltic pump rubber tube 12, and the tubular mold 10 is provided with a sleeve bottom corner 8 to facilitate connection with the base 9 when nested with the base 9.

[0031] like Figure 1 As shown, the tubular mold 10 includes a tubular sample sleeve 6 and a drainage groove 7. The tubular sample sleeve 6 is nested with the cylindrical nesting portion 1. The drainage groove 7 is inclined around the tubular sample sleeve 6. A drainage port for collecting and discharging overflowing waste liquid is provided at the lowest point of the drainage groove 7. During the curing process of the sample in the tubular sample sleeve 6, the overflowing waste liquid flows into the drainage groove 7 and is discharged from the drainage port into a pre-placed open container.

[0032] like Figure 3 As shown, after the tubular sample preparation sleeve 6 is nested, the internal space size is the same as the required size of the sample, and the through-type circular hole 2 penetrates the base 9 from the vertical geometric center point.

[0033] The through circular hole 2 of the base 9 and the tubular mold 10 are connected with a peristaltic pump rubber hose 12 , the peristaltic pump rubber hose 12 is connected with the output end of an external peristaltic pump 11 , and the input end of the external peristaltic pump 11 is connected to the nano-silica sol through the peristaltic pump rubber hose 12 . Example

[0034] Based on Example 1, an implementation of a cylindrical nesting portion is provided.

[0035] A circular fine-pore nylon mesh 15 is arranged on the upper part of the cylindrical nesting part 1 , and the circular fine-pore nylon mesh 15 is used to prevent sample preparation sand and soil from entering the through-type circular hole 2 .

[0036] The difference between this embodiment and the first embodiment is that a circular fine-pore nylon mesh 15 is provided to prevent sample preparation sand from entering the through-type circular hole 2 to prevent the sample preparation sand from clogging the through-type circular hole 2 and affecting the nano-silica sol 13 from entering the tubular mold 10.

[0037] Working principle and process:

[0038] (1) Place the circular fine-pore nylon mesh 15 on the upper plane of the cylindrical nesting part 1, and then firmly fit the cylindrical nesting part 1 on one end of the sample-preparing rubber film 14, so that the sample-preparing rubber film 14 and the cylindrical nesting part 1 pass through the tubular sample-preparing sleeve 6 as a whole, thereby completing the nesting of the base 9 and the tubular mold 10.

[0039] (2) The portion of the other end of the sample-preparing rubber film 14 that protrudes from the tubular sample-preparing sleeve 6 is flanged and put on the upper end of the tubular sample-preparing sleeve 6, and then the peristaltic pump rubber tube 12 is connected to the suction end of the external peristaltic pump 11 and the nano-silica sol 13, and the pump outlet end of the external peristaltic pump 11 and the through-type circular hole 2 are connected. During the process, the air tightness of each connection with the base 9 and the tubular mold 10 must be ensured. Then, the device is placed vertically on a plane, and an open container is placed at the drainage position of the drainage trough 7.

[0040] (3) Add the test sand and soil into the sample preparation rubber membrane 14 in layers until the upper surface of the sand and soil is flush with the upper end of the tubular sample preparation sleeve 6. Connect the external peristaltic pump 11 to the power supply and turn on the switch to allow the nano-silica sol 13 to slowly and evenly penetrate the sample from bottom to top.

[0041] (4) When the nano-silica sol 13 penetrates to the top of the sample, the external peristaltic pump 11 is kept working for five minutes to ensure the uniform penetration of the sample by the nano-silica sol 13. The overflowing waste liquid flows into the drainage trough 7 and is discharged from the drainage port into the pre-placed open container.

[0042] (5) Turn off the external peristaltic pump 11, pull out the peristaltic pump rubber tube 12 located at the through-hole 2, and then immediately close the through-hole 2 to ensure air tightness, and keep the sample preparation device stationary before the nano-silica sol 13 gels.

[0043] (6) After the nano-silica sol 13 is gelled, the rubber film 14 on the upper end of the tubular sample preparation sleeve 6 is turned back, and the tubular mold 10 is slowly and vertically taken out. Then, the middle of the rubber film 14 is gently held with one hand, and the base 9 is slowly twisted with the other hand to take out the base 9 and the circular fine-pore nylon mesh 15 placed on the base 9. This completes the sample preparation process. The prepared sample can be directly equipped with filter paper and permeable stone for triaxial test, or further maintenance and strengthening can be carried out.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only used to explain the relative position relationship, movement, etc. between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0046] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A sample preparation device for a triaxial apparatus for nano-silica sol-solified sand, characterized in that: The invention comprises a base, a tubular mold is nested and connected on the top of the base, the base comprises a cylindrical nesting part, a through-hole, a cylindrical support and a cylindrical support, a cylindrical support is fixedly connected on the top of the cylindrical support, a cylindrical nesting part is connected on the top of the cylindrical support, a through-hole is arranged inside the cylindrical nesting part, the cylindrical nesting part is nested with the tubular mold, the through-hole is connected with the inside of the tubular mold, and nano silica sol is input through the through-hole. The cylindrical nesting portion is sleeved with a sample-making rubber film, and the other end of the sample-making rubber film is flanged and sleeved on the tubular mold.

2. The sample preparation device for the triaxial apparatus for nano-silica sol-solified sand according to claim 1, characterized in that: The bottom of the base is provided with a round hole with rounded corners at the bottom to facilitate the base to be connected to the peristaltic pump rubber tube.

3. The sample preparation device for the triaxial apparatus for nano-silica sol-solified sand according to claim 1, characterized in that: The tubular mold comprises a tubular sample-making sleeve and a drainage groove. The tubular sample-making sleeve is nested with the cylindrical nesting portion, and the drainage groove is obliquely surrounded by the tubular sample-making sleeve.

4. The sample preparation device for the triaxial apparatus for nano-silica sol-solified sand according to claim 3 is characterized in that: A drainage port for collecting and draining overflowed waste liquid is provided at the lowest point of the drainage trough.

5. The sample preparation device for the triaxial apparatus for nano-silica sol-solified sand according to claim 1, characterized in that: The tubular mold is provided with a sleeve bottom rounded corner to facilitate connection with the base when nested with the base.

6. The sample preparation device for the triaxial apparatus for nano-silica sol-solified sand according to claim 3, characterized in that: The inner space size of the tubular sample preparation sleeve after being nested is the same as the required size of the sample.

7. The sample preparation device for the triaxial apparatus for nano-silica sol-solified sand according to claim 1, characterized in that: The through-type circular hole penetrates the base from the vertical geometric center point.

8. The sample preparation device for the triaxial apparatus for nano-silica sol-solified sand according to claim 1, characterized in that: The through-type circular hole of the base and the tubular mold are connected with a peristaltic pump rubber hose, the peristaltic pump rubber hose is connected with an output end of an external peristaltic pump, and the input end of the external peristaltic pump is connected with the nano-silica sol through the peristaltic pump rubber hose.

9. The sample preparation device for the triaxial apparatus for nano-silica sol-solified sand according to claim 1, characterized in that: A circular fine-pore nylon mesh is arranged on the upper part of the cylindrical nesting part.

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