CN114383908A - Saturator, triaxial test sample preparation device and sample preparation method - Google Patents
Saturator, triaxial test sample preparation device and sample preparation method Download PDFInfo
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- CN114383908A CN114383908A CN202210011654.9A CN202210011654A CN114383908A CN 114383908 A CN114383908 A CN 114383908A CN 202210011654 A CN202210011654 A CN 202210011654A CN 114383908 A CN114383908 A CN 114383908A
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- 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
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- 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
- G01N1/36—Embedding or analogous mounting of samples
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- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a saturator, a triaxial test sample preparation device and a sample preparation method, wherein in the saturator, a first cylinder unit comprises two semicircular outer shells of which the inner walls are fixed with 1/4 circular inner shells; the second cylinder unit comprises a fixing ring and two 1/4 circular inner shells which are oppositely arranged in the fixing ring; the two semicircular outer shells are enclosed to form an outer cylinder, and the four 1/4 circular inner shells are enclosed to form an inner cylinder; an outer sleeve ring is arranged on the inner barrel, and a force application hole for inserting the pressure rod is formed in the outer sleeve ring; the outer sleeve is positioned at the top of the outer cylinder and below the fixing ring; the sampler comprises a sampling sleeve, a sampling iron ring and a magnetic pressure ring which are sequentially arranged from top to bottom, wherein the magnetic pressure ring is provided with a pressure rod; spacing sleeve includes barrel and detachable base, is equipped with the bar opening of adaptation depression bar on the barrel, and the barrel top is equipped with the screw that is used for fixed sampling sleeve. The invention can reduce the sampling times and the contact area between the single valve and the sample, realize the synchronous sampling and the film covering, ensure the integrity of the sample from the sampling to the film covering and improve the reliability of data.
Description
Technical Field
The invention relates to preparation of geotechnical engineering triaxial test samples, in particular to a saturator, a triaxial test sample preparation device and a sample preparation method.
Background
The triaxial test is a reliable method for acquiring physical parameters of rock and soil mass in geotechnical engineering, and the preparation quality of a test sample in the test has important influence on the test precision and the data reliability. At present, in a common saturator for sample preparation, a sample preparation cylinder is composed of three petals, the contact area of a single petal and a sample is large, the sample is easy to damage during sampling, and the sampling needs to be carried out for three times, so that the times are more. After sampling is finished, film covering work is carried out, and secondary damage is easily caused to the sample during film covering. Like CN109531798A, it has the following problems: (1) the three-flap mold is adopted for sampling, and the problems that the contact area of the flap mold and a sample is large, the sampling times are many, and the surface of the sample is easy to damage exist during mold stripping; (2) the valve ring for sampling has no proper force application point, so that the valve mold is easily pressed askew by uneven force application during sampling, and a sample is damaged; (3) the outer sides of the three petals are not limited during sampling, and the surface soil can be obliquely driven to slide down to damage the sample when the petals are quickly stripped. As with CN103969081A, it has the following problems: (1) the force application point is single when the sample is pressed downwards, so that the three-segment mold is easy to be out of the vertical direction when the sample is sampled, and the sample is extruded and deformed by the three-segment mold; (2) the three-split mold is separated at one time during sampling, the contact area between the mold and the sample is large, and the surface of the sample is easy to damage; (3) the sample that takes out is located the piston cap, need take out again, need again to the sample mantle during the experiment, and the step is loaded down with trivial details, easily causes the sample destruction.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a saturator for ensuring the quality of a sample during mold stripping, the second aim of the invention is to provide a triaxial test sample preparation device capable of synchronously stripping and coating, and the third aim of the invention is to provide a triaxial test sample preparation method.
The technical scheme is as follows: the saturator comprises a sample preparation cylinder, wherein the sample preparation cylinder comprises a first cylinder unit and a second cylinder unit, and the first cylinder unit comprises two semicircular outer shells of which the inner walls are fixed with a first 1/4 circular inner shell; the second cylinder unit comprises a fixing ring and two second 1/4 circular inner shells which are oppositely arranged in the fixing ring; the two semicircular outer shells are enclosed to form an outer cylinder, and the four 1/4 circular inner shells are enclosed to form an inner cylinder.
The traditional three-petal saturator is improved, and comprises two mutually separable cylinder units, so that the sampling which is originally required to be completed by three times is reduced to two times, meanwhile, the contact area of a sample and a single petal is reduced in each sampling, an 1/4 round inner shell (equivalent to the petal) is contacted with the sample, the contact area of the single petal is reduced to 1/4 round from the original 1/3 round, and the damage degree of the sample in the sampling process can be effectively reduced.
Furthermore, a limiting sleeve ring is arranged at the end part of the sample preparation cylinder, and the limiting sleeve ring, the first cylinder unit and the second cylinder unit are fixedly inserted through a limiting bolt, so that the saturator forms a whole and is convenient to carry, take and place.
Furthermore, an outer sleeve ring is arranged on the inner barrel, and force application holes for inserting the compression bar are symmetrically formed in the outer sleeve ring; the outer collar is located the urceolus top, solid fixed ring below. The pressing rods are symmetrically inserted into the outer sleeve ring, the first cylinder unit can be separated downwards by the aid of the pressing rods matched with the outer sleeve ring, force is applied uniformly, and deformation of a soil sample caused by uneven stress during sampling can be avoided.
The invention also provides a triaxial test sample preparation device, which comprises a sampler, a limiting sleeve and the saturator; the sampler comprises a sampling sleeve, a sampling iron ring and a magnetic pressure ring which are sequentially arranged from top to bottom, wherein two sides of the magnetic pressure ring are provided with pressure rods; spacing sleeve includes the barrel, and the barrel bottom is equipped with the detachable base, is equipped with the bar opening that supplies the depression bar to reciprocate on the barrel, and the barrel top is equipped with the screw that is used for fixed sampling sleeve.
The limiting sleeve can prevent the saturant inside from damaging the sample by obliquely driving surface soil to slide off in the later stage of sampling. Butting the sampling sleeve with a sampling iron ring, fixing the tail end of the rubber membrane on the outer wall of the sampling sleeve by using a rubber band, penetrating out of the sampling sleeve and wrapping the sampling sleeve on the outer wall of the sampling sleeve; then put into spacing sleeve in proper order with the saturator with the sampling sleeve of wrapping up the rubber membrane, after fixing the sampling sleeve through the screw on the spacing sleeve, push down outer lantern ring and break away from first barrel unit, push down the magnetism clamping ring again and break away from second barrel unit, drive the sample hoop together and move down under the magnetic force effect when the magnetism clamping ring moves down, overlap the rubber membrane on the soil sample when taking a sample. The device can realize synchronous sampling and film covering, simplifies the sample preparation process, ensures the integrity of the sample, has strong applicability, and is not only suitable for sampling and film covering of rock and soil materials with strong crumbling property and weak viscosity, such as steel slag, fly ash, sandy soil and the like, but also suitable for sampling and film covering of cohesive soil.
Further, the top of the outer wall of the sampling sleeve is provided with a circumferential groove. The circumferential groove can be matched with a rubber band to better fix the tail end of the rubber film.
Further, be equipped with the aspirating hole on the sampling sleeve, this aspirating hole is used for taking out the air between rubber membrane and the sampling sleeve inner wall after the rubber membrane has been wrapped up in to the sampling sleeve for the rubber membrane pastes tight sampling sleeve.
Furthermore, the compression bar is inserted and fixed on the magnetic compression ring.
Further, the base is in threaded connection with the barrel.
The invention also provides a triaxial test sample preparation method, which comprises the following steps:
(1) completely pulling out the limiting bolt on the saturator, taking down the limiting lantern ring, and putting the saturator into the limiting sleeve;
(2) placing the magnetic compression ring into a limiting sleeve, butting the sampling sleeve with a sampling iron ring, fixing the tail end of the rubber film on the outer wall of the sampling sleeve by using a rubber band, penetrating out of the sampling sleeve and wrapping the sampling sleeve on the outer wall of the sampling sleeve;
(3) placing the sampling sleeve wrapped with the rubber film into a limiting sleeve, and screwing a screw into the screw hole to fix the sampling sleeve;
(4) pressing the outer sleeve ring to the bottom end of the strip-shaped opening to complete the separation of the first cylinder unit; and pressing the magnetic pressing ring to the bottom end of the strip-shaped opening to complete the separation of the second cylinder unit, and simultaneously, sliding the sampling iron ring down along with the magnetic pressing ring to complete the film sleeving work.
As mentioned above, the invention can realize the synchronous sampling and film covering, simplify the sample preparation process and ensure the integrity of the sample.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: (1) the sampling frequency is reduced, and the contact area between the sample and the single valve mold is reduced during sampling, so that the damage degree of the sample during sampling can be reduced; (2) the sample preparation device has strong applicability, can realize synchronous sampling and film covering, simplifies the sample preparation process, can ensure the integrity of the sample from sampling to film covering, and improves the reliability of the triaxial test data.
Drawings
FIG. 1 is a schematic view of a sample preparation device;
FIG. 2 is a schematic diagram of the structure of the sampler;
FIG. 3 is a schematic view of the magnetic pressure ring;
FIG. 4 is a schematic diagram of a saturator configuration;
FIG. 5 is a schematic structural view of a first cartridge unit;
FIG. 6 is a schematic structural view of the second cartridge unit;
FIG. 7 is a schematic diagram of the construction of the saturator cap;
FIG. 8 is a schematic structural view of a limit bolt;
fig. 9 is a schematic structural view of the spacing sleeve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The triaxial test sample preparation device shown in fig. 1 comprises a sampler 1, a saturator 2 and a limiting sleeve 3.
With reference to fig. 2 and 3, the sampler 1 includes a sampling sleeve 11, a sampling iron ring 12 and a magnetic compression ring 13, which are sequentially arranged from top to bottom, wherein compression rods 14 are arranged on two sides of the magnetic compression ring 13, and the compression rods 14 are in insertion fit with the magnetic compression ring 13. The sampling sleeve 11 is provided with an air suction hole 16, and the top of the outer wall of the sampling sleeve 11 is provided with a circumferential groove 15. The top of the sampling sleeve 11, the bottom of the sampling iron ring 12 and the top of the magnetic pressure ring 13 are all subjected to smoothing treatment to avoid damaging the rubber membrane.
Referring to fig. 4 to 8, the saturator 2 includes a sample making cylinder and two saturator caps 26, wherein the sample making cylinder includes a first cylinder unit 21 and a second cylinder unit 22, and the first cylinder unit 21 includes two semicircular outer shells 212 having first 1/4 circular inner shells 211 fixed on inner walls thereof. The second cylinder unit 22 includes a fixing ring 222 and two second 1/4 round inner shells 221 oppositely disposed in the fixing ring 222. The two semicircular outer shells 212 are enclosed to form an outer cylinder, and the four 1/4 circular inner shells are enclosed to form an inner cylinder. An outer sleeve ring 23 is arranged on the inner barrel, force application holes for inserting the compression bar are symmetrically formed in the outer sleeve ring 23, and the outer sleeve ring 23 is located on the top of the outer barrel and below the fixing ring 222. Two ends of the sample preparation cylinder are provided with limiting lantern rings 24, and the limiting lantern rings 24 are uniformly provided with four limiting holes along the circumferential direction and used for inserting limiting bolts 27 to fix the first cylinder body unit and the second cylinder body unit. The position of the limit hole is also provided with a clamping groove for buckling with a buckle of the saturator sealing cover 26, and a permeable stone 25 is placed in a sinking groove of the saturator sealing cover 26.
Referring to fig. 9, the limiting sleeve 3 includes a barrel 32 and a base 31, and the base 31 is provided with an external thread 34, which is in threaded connection with the barrel 32. The cylinder 32 is provided with a strip-shaped opening 33 for the pressure rod 14 to move up and down, and the top of the cylinder 32 is provided with a screw hole 35 for fixing the sampling sleeve 11.
The triaxial test sample preparation method comprises the following steps:
(1) connecting the cylinder 32 with the base 31 through threads 34 to form a complete limiting sleeve 3;
(2) taking out the saturator 2 which is maintained to the age from the maintenance box, pulling out all the limit bolts 27, and removing the saturator cover 26 and the limit lantern ring 24;
(3) putting the disassembled saturator 2 into a limiting sleeve 3;
(4) inserting the pressure rod 14 into the magnetic pressure ring 13, and placing the magnetic pressure ring 13 into the limiting sleeve 3;
(5) butting the sampling sleeve 11 with a sampling iron ring 12, fixing the tail end of a rubber film in a circumferential groove 15 of the sampling sleeve 11 by using a rubber band, penetrating out of the sampling sleeve 11 and wrapping the sampling sleeve 11 on the outer wall of the sampling sleeve 11, and exhausting air at an exhaust hole 16 by using a dropper or an exhaust cylinder so that the rubber film is tightly attached to the inner wall of the sampling sleeve 11, and flattening the rubber film to finish the wrapping work of the rubber film;
(6) placing the sampling sleeve 11 wrapped with the rubber film into the limiting sleeve 3, and screwing a screw into a screw hole 35 of the limiting sleeve 3 to fix the sampling sleeve 11;
(7) inserting the pressure lever 14 into the force application hole of the outer sleeve ring 23, pressing down the pressure lever 14 to the bottom end of the strip-shaped opening 33, removing the pressure lever 14, and completing the separation of the first cylinder unit 21;
(8) pressing the magnetic pressing ring 13 to the bottom end of the strip-shaped opening 33 to complete the separation of the second cylinder unit 22, and along with the downward sliding of the sampling iron ring 12 along with the magnetic pressing ring 13, the film covering work is completed while the second cylinder unit 22 is separated;
(9) the base 31 is unscrewed, and the base 31, the first cylinder unit 21, the second cylinder unit 22, the limiting sleeve 3 and the sample sleeved with the film are taken out in sequence.
Claims (9)
1. A saturator, includes system appearance section of thick bamboo, its characterized in that: the sample preparation cylinder comprises a first cylinder unit (21) and a second cylinder unit (22), wherein the first cylinder unit (21) comprises two semicircular outer shells (212) of which the inner walls are fixed with first 1/4 circular inner shells (211); the second cylinder unit (22) comprises a fixing ring (222) and two second 1/4 round inner shells (221) which are oppositely arranged in the fixing ring (222); the two semicircular outer shells (212) are enclosed to form an outer cylinder, and the four 1/4 circular inner shells are enclosed to form an inner cylinder.
2. The saturator of claim 1, wherein: the end part of the sample preparation cylinder is provided with a limiting sleeve ring (24), and the limiting sleeve ring (24) and the first and second cylinder units are fixedly inserted through a limiting bolt (27).
3. The saturator according to claim 1 or 2, wherein: an outer sleeve ring (23) is arranged on the inner barrel, and force application holes for inserting the compression bar are symmetrically formed in the outer sleeve ring (23); the outer sleeve (23) is positioned on the top of the outer cylinder and below the fixing ring (222).
4. The utility model provides a triaxial test system appearance device which characterized in that: comprising a sampler (1), a limiting sleeve (3) and a saturator according to claim 3; the sampler (1) comprises a sampling sleeve (11), a sampling iron ring (12) and a magnetic pressure ring (13) which are sequentially arranged from top to bottom, and two sides of the magnetic pressure ring (13) are provided with pressure rods (14); spacing sleeve (3) are equipped with detachable base (31) including barrel (32) bottom barrel (32), are equipped with on barrel (32) and supply bar pressure lever (14) bar opening (33) that reciprocate, and barrel (32) top is equipped with screw (35) that are used for fixed sampling sleeve (11).
5. The triaxial test sample preparation apparatus of claim 4, wherein: the top of the outer wall of the sampling sleeve (11) is provided with a circumferential groove (15).
6. The triaxial test sample preparation apparatus of claim 4, wherein: and an air suction hole (16) is formed in the sampling sleeve (11).
7. The triaxial test sample preparation apparatus of claim 4, wherein: the compression bar (14) is inserted and fixed on the magnetic compression ring (13).
8. The triaxial test sample preparation apparatus of claim 4, wherein: the base (31) is in threaded connection with the barrel (32).
9. A triaxial test sample preparation method is characterized in that: the method comprises the following steps:
(1) completely pulling out the limiting bolt (27) on the saturator, taking down the limiting lantern ring (24), and putting the saturator into the limiting sleeve (3);
(2) the magnetic compression ring (13) is placed into the limiting sleeve (3), the sampling sleeve (11) is butted with the sampling iron ring (12), the tail end of the rubber film is fixed on the outer wall of the sampling sleeve (11) through a rubber band, penetrates out of the sampling sleeve (11) and is wrapped on the outer wall of the sampling sleeve (11);
(3) placing the sampling sleeve (11) wrapped with the rubber film into the limiting sleeve (3), and screwing a screw into the screw hole (35) to fix the sampling sleeve (11);
(4) pressing the outer sleeve ring (23) downwards to the bottom end of the strip-shaped opening (33) to complete the separation of the first cylinder unit (21); and the magnetic pressure ring (13) is pressed down to the bottom end of the strip-shaped opening (33) to complete the separation of the second cylinder unit (22), and meanwhile, the sampling iron ring (12) slides down along with the magnetic pressure ring (13) to complete the film sleeving work.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210011654.9A CN114383908B (en) | 2022-01-06 | 2022-01-06 | Saturator, triaxial test sample preparation device and sample preparation method |
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| CN202210011654.9A CN114383908B (en) | 2022-01-06 | 2022-01-06 | Saturator, triaxial test sample preparation device and sample preparation method |
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| CN114383908B CN114383908B (en) | 2023-06-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117419995A (en) * | 2023-12-18 | 2024-01-19 | 中铁十八局集团第四工程有限公司 | Saturated red clay triaxial sample demoulding structure |
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| CN114383908B (en) | 2023-06-20 |
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