CN113804523A - Visual sealed sample preparation device, assembly method and sample preparation method for discrete materials - Google Patents
Visual sealed sample preparation device, assembly method and sample preparation method for discrete materials Download PDFInfo
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- CN113804523A CN113804523A CN202110990762.0A CN202110990762A CN113804523A CN 113804523 A CN113804523 A CN 113804523A CN 202110990762 A CN202110990762 A CN 202110990762A CN 113804523 A CN113804523 A CN 113804523A
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- 239000000463 material Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000007 visual effect Effects 0.000 title abstract description 19
- 238000005464 sample preparation method Methods 0.000 title abstract description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 69
- 238000011068 loading method Methods 0.000 claims abstract description 59
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 238000012800 visualization Methods 0.000 claims abstract description 10
- 239000012780 transparent material Substances 0.000 claims abstract description 6
- 239000000523 sample Substances 0.000 claims description 195
- 239000004575 stone Substances 0.000 claims description 36
- 238000000465 moulding Methods 0.000 claims description 18
- 239000013590 bulk material Substances 0.000 claims description 15
- 238000009835 boiling Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 abstract description 17
- 230000032798 delamination Effects 0.000 abstract 1
- 241000446313 Lamella Species 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 239000012520 frozen sample Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
本发明公开了一种散体材料的无损伤可视化双向密封制样装置，通过在压力室底座上、瓣体上设置凹槽和密封圈实现竖向和环向的双向密封，使得橡皮膜能在装样过程中无需其他辅助设备保持紧贴对开圆模制样筒内壁；瓣体采用透明材料制作以及瓣体上的分层刻度线实现了装样过程可视化，保证成样的均质性和密度准确性；且保证每层试样、整个试样表面水平；采用卡接条连接左、右瓣体，完成制样后易于拆卸；卡接条外部包裹弹性橡胶层提高了瓣体连接处的密封性。本发明还公开了一种散体材料的制样方法，采用带带刻度线的刨刀使试样刨毛且试样各层交接面处无分层；在对试样无任何损伤的情况下完成装样；整个过程在可视化的环境下操作完成，能够保证每层试样的均匀性。
The invention discloses a damage-free visual bidirectional sealing sample preparation device for bulk materials. The vertical and annular bidirectional sealing is realized by arranging grooves and sealing rings on the base of the pressure chamber and the valve body, so that the rubber membrane can be During the sample loading process, no other auxiliary equipment is required to keep close to the inner wall of the split circular molded sample cylinder; the valve body is made of transparent material and the layered scale lines on the valve body realize the visualization of the sample loading process, ensuring the homogeneity of the sample and the stability of the sample. The density is accurate; and the surface of each layer of the sample and the entire sample is guaranteed to be level; the left and right valve bodies are connected by clip strips, which are easy to disassemble after the sample preparation is completed; tightness. The invention also discloses a sample preparation method for bulk materials, which adopts a planer with a scale line to plan the sample without delamination at the interface of each layer of the sample; the method is completed without any damage to the sample. Loading samples; the whole process is completed in a visual environment, which can ensure the uniformity of each layer of samples.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering indoor geotechnical test equipment, and particularly relates to a nondestructive visual bidirectional sealing sample preparation device for bulk materials, an assembling method of the nondestructive visual bidirectional sealing sample preparation device for the bulk materials, and a nondestructive visual bidirectional sealing sample preparation method for the bulk materials.
Background
The accuracy of test data in an indoor geotechnical test is extremely important, and the preparation of a sample is the core of the accuracy of the test data and is the key for ensuring the value of the geotechnical test data. The sample preparation requires that the sample preparation ensures that the uniformity and the density are within an error range: the maximum allowable error between the density of the sample prepared by the disturbed soil sample and the preparation standard is +/-0.02 g/cm3The maximum allowable difference value between samples in a disturbed soil parallel test or a group of samples is +/-0.02 g/cm3. In particular, in the case of the sample formation of the bulk material (e.g., sandy soil), the particles of the bulk material are not sticky, and it is extremely difficult to ensure uniform, equal-density, and non-destructive sample formation.
The conventional sample loading method for discrete materials is to directly sleeve a rubber film on a base, prepare a sand sample split round die, and then load and form a sample. However, the existing instrument and equipment cannot realize complete sealing with the bottom of the sample preparation circular mold in the circumferential direction, so that a rubber film cannot be tightly attached to a molding barrel, and sample loading cannot be finished or can be finished only by other auxiliary equipment; there are also many experimenters who use a frozen sample to complete the loading of discrete materials. However, both methods have drawbacks: 1. the existing sand sample preparation circular mold is arranged on an instrument base, a split mold can be fixed only by sleeving and tightening, and an auxiliary device is also configured to continuously pump air to enable a rubber film to be tightly attached to a molding barrel, so that the problems that the number of parts is large, the operation is inconvenient, the height and the density of a sample are uncontrollable during sample loading, and the uniformity and the density of the sample cannot reach the design standard are solved; 2. the frozen sample preparation method is only suitable for saturated samples, the samples need to wait for thawing after being installed, the thawing time cannot be controlled, and the samples are subjected to one-time freeze-thaw disturbance. Therefore, the sample preparation of the prior bulk material is difficult, and if the sample is directly loaded on the base of the instrument, the sample forming uniformity and the density are uncontrollable; if the frozen sample is used for loading, the sample is severely disturbed.
Disclosure of Invention
The invention aims to provide a nondestructive visual bidirectional sealing sample preparation device for bulk materials, which can realize nondestructive sample loading of the bulk materials without auxiliary equipment and can accurately control the uniformity of prepared samples.
The invention also aims to provide an assembly method of the nondestructive visual bidirectional sealing sample preparation device for discrete materials.
The invention also aims to provide a nondestructive visual bidirectional sealing sample preparation method for discrete materials.
The invention adopts the technical scheme that the nondestructive visual bidirectional sealing sample preparation device for the bulk materials comprises a pressure chamber base, wherein a boss is arranged in the middle of the pressure chamber base, a base channel is arranged in the pressure chamber base, a split round mold sample cylinder is connected along the periphery of the boss of the pressure chamber base in a sealing manner, the inner wall of the split round mold sample cylinder is connected with a rubber film in a fitting manner, a bottom pervious stone and a top pervious stone are placed in the rubber film, the bulk materials are filled between the bottom pervious stone and the top pervious stone in the rubber film, and the nondestructive visual bidirectional sealing sample preparation device also comprises a compactor for compacting the bulk materials; the split round mold sample cylinder is made of transparent materials, and sample containing layered scale marks are marked along the height direction of the split round mold sample cylinder.
The invention is also characterized in that:
the split-circle molding sample cylinder comprises a left valve body and a right valve body, the cross sections of the left valve body and the right valve body are semicircular, the left valve body and the right valve body are butted to form a cylinder body, the end parts of the side walls of the left valve body and the right valve body are provided with groove-shaped clamping grooves, the left valve body and the right valve body are connected in a sealing mode through clamping strips located in two adjacent clamping grooves, and the clamping strips are flush with the outer wall of the left valve body and the outer wall of the right valve body.
The two ports of the left valve body are inwards provided with grooves, the two ports of the right valve body are outwards provided with bulges, the two bulges and the two grooves are butted and folded, and the clamping strip is attached to the clamping groove at the butt joint position of the bulges and the grooves.
The clamping strip comprises a rigid framework, secondary grooves are formed in two ends of the rigid framework, an elastic rubber layer covers the periphery of the rigid framework, the left valve body and the right valve body are located in the clamping groove and are connected with the secondary protrusions in an integrated mode, and the secondary grooves of the clamping strip are connected with the secondary protrusions on the left valve body and the right valve body in a matched mode.
The left valve body or the right valve body is provided with an air suction hole.
First grooves are formed in the bottom surfaces of the left valve body and the right valve body, second grooves are formed in the positions, right facing the first grooves, of the pressure chamber base, and the first grooves are connected with the second grooves through rubber sealing rings.
The sample loading device is characterized by further comprising a sample loading funnel, the outlet end of the sample loading funnel is connected with a conical plug, the conical plug penetrates through the sample loading funnel through a lifting rod, and sample materials are contained in the sample loading funnel.
The compactor is a step type variable cross-section hammer seat with the largest bottom area, a plurality of heavy hammers are connected to the step type variable cross-section hammer seat, and the top of the compactor is connected with a level meter.
The second technical scheme adopted by the invention is that the assembling method of the nondestructive visual bidirectional sealing sample preparation device for the discrete material is implemented according to the following steps:
selecting a pressure chamber base, checking the air tightness of a rubber film, fastening the bottom of the rubber film on a boss of the pressure chamber base through a rubber band, forming a second groove on the pressure chamber base around the boss, placing a rubber sealing ring in the second groove, forming first grooves at the bottoms of a left valve body and a right valve body, connecting the first grooves at the bottoms of the left valve body and the right valve body with the rubber sealing ring in a matched manner, butting and folding the grooves at the two ends of the left valve body with the bulges at the two ends of the right valve body, and connecting the left valve body and the right valve body in a sealing manner through a clamping strip; turning over the top end of the rubber membrane and sleeving the top peripheries of the left valve body and the right valve body, finishing the flattening of the rubber membrane, and then sucking air by using an ear sucking ball through an air sucking hole to enable the rubber membrane to be tightly attached to the inner walls of the left valve body and the right valve body; preparing bottom permeable stone and top permeable stone, boiling the bottom permeable stone and the top permeable stone in boiling water, cooling, and then sliding the bottom permeable stone along the rubber film to be pressed into the boss of the pressure chamber base.
The third technical scheme adopted by the invention is that the sample preparation method of the discrete material is implemented according to the following steps:
and 8, drawing out the clamping strips, dismounting the left valve body and the right valve body of the sample preparation cylinder, and completing sample preparation of the discrete sample material.
The invention has the beneficial effects that:
the vertical and annular bidirectional sealing is realized by arranging the grooves and the sealing rings on the base and the valve body of the pressure chamber, so that the rubber film can be kept to be tightly attached to the inner wall of the split circular molding sample cylinder in the sample loading process without other auxiliary equipment; the valve body is made of transparent materials, and the layered scale marks on the valve body realize visualization of a sample loading process, so that homogeneity and density accuracy of a formed sample are ensured; and the surface level of each layer of samples and the whole sample is ensured; the clamping strips are adopted to connect and fix the left valve body and the right valve body, so that the valve body is easy to disassemble after sample preparation is finished; the outside parcel elasticity rubber layer of joint strip has improved the leakproofness of lamella body junction.
The invention also discloses a sample preparation method of the discrete material, wherein a planer tool with scale marks is adopted to plane the sample and the joint surfaces of all layers of the sample are not layered; completing sample loading under the condition of no damage to the sample; the whole process is operated and finished under a visual environment, and the uniformity of each layer of samples can be ensured.
Drawings
FIG. 1 is a schematic structural diagram of a nondestructive visual bidirectional sealing sample preparation device for discrete materials according to the invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a right side view of FIG. 1;
FIG. 4 is a left side view of FIG. 1;
FIG. 5 is a cross-sectional view taken along line 1-1 of FIG. 1;
FIG. 6 is a cross-sectional view taken at 2-2 of FIG. 1;
FIG. 7 is a cross-sectional view taken at 3-3 of FIG. 1;
FIG. 8 is a schematic diagram of the split type of the clamping strip, the left valve body and the right valve body;
FIG. 9 is a schematic view of a sample loading funnel;
FIG. 10 is a schematic view of a compactor according to the present invention;
FIG. 11 is a schematic view of the loading process using a loading funnel in accordance with the present invention;
FIG. 12 is a schematic representation of the compactor pressing to a stratified thickness in accordance with the present invention.
In the figure, 1, a pressure chamber base, 2, a rubber membrane, 3, an opposite-opening circular mold sample cylinder, 4, a left valve body, 5, a right valve body, 6, an air suction hole, 7, a sample material, 8, a rubber band, 9, a bottom water-permeable stone, 10, a rubber ring, 11, a top water-permeable stone, 12, a sample top cap, 13, a level gauge, 14, a clamping strip, 15, a sample loading layered scale mark, 16, a clamping groove, 17, a groove, 18, a protrusion, 19, a heavy hammer, 20, a step-type variable cross-section hammer seat, 21, a compactor, 22, a cone-shaped plug, 23, a sample loading funnel, 24, a second groove, 25, a first groove, 26, an inner wall groove, 27, a first layer sample loading and 28, a vertical sealing strip.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a nondestructive visual bidirectional sealing sample preparation device for a bulk material, which comprises a pressure chamber base 1 with a boss arranged in the middle, a base channel is arranged in the pressure chamber base 1, a split round molding sample cylinder 3 is hermetically connected along the periphery of the boss of the pressure chamber base 1, the inner wall of the split round molding sample cylinder 3 is jointed with a rubber film 2, a bottom pervious stone 9 and a top pervious stone 11 are arranged in the rubber film 2, the bulk material is filled between the bottom pervious stone 9 and the top pervious stone 11 in the rubber film 2, and a compactor 21 is further included for compacting the bulk material, the split round molding sample cylinder 3 is made of a transparent material, so that the sample preparation process can be observed, the sample preparation amount can be controlled, and a sample preparation layered scale line 15 is arranged in the height direction of the split round molding sample cylinder 3, so that the precision control of sample preparation is facilitated.
As shown in fig. 5, 6, 7 and 8, the bisected circular molded sample cylinder 3 comprises a left petal body 4 and a right petal body 5, the cross section of which is semicircular, the left petal body 4 and the right petal body 5 are butted and folded to form a cylinder body, the end side walls of the left petal body 4 and the right petal body 5 are provided with clamping grooves 16, the left petal body 4 and the right petal body 5 are connected through clamping strips 14 positioned in the two adjacent clamping grooves 16, and the clamping strips 14 are flush with the outer walls of the left petal body 4 and the right petal body 5.
The two ports of the left valve body 4 are inwards provided with grooves 17, the two ports of the right valve body 5 are outwards provided with protrusions 18, the two protrusions 18 and the two grooves 17 are butted and folded, the clamping strip 14 is inserted into a clamping groove 16 connected to the butt joint position of the protrusions 18 and the grooves 17, a vertical sealing strip 28 is connected between the protrusions 18 and the grooves 17, and the clamping strip 14 can fix and seal the left valve body 4 and the right valve body 5.
The left valve body 4 or the right valve body 5 is provided with the air suction hole 6, so that the rubber film 2 can be attached to the left valve body 4 and the right valve body 5 through air suction.
As shown in fig. 9, the sample loading device further comprises a sample loading funnel 23, an outlet end of the sample loading funnel 23 is connected with a conical plug 22, the conical plug 22 penetrates through the sample loading funnel 23 through a lifting rod, bulk materials 7 are contained in the sample loading funnel, when the bulk materials 7 need to be added into the split round molding sample cylinders 3, the bulk materials 7 are added into the split round molding sample cylinders 3, the size of a gap between the conical plug 22 and the sample loading funnel 23 is controlled by controlling the position of the conical plug 22, the purpose of controlling the sliding speed of the bulk materials 7 is further achieved, the problem that the uniform distribution density is large due to extrusion of local sample materials because free falling bodies or a large amount of bulk materials 7 slide down too fast is avoided, and after the addition of the bulk materials 7, the top permeable stones 11 are covered on the bulk materials 7.
As shown in fig. 10, the compactor 21 is a stepped variable cross-section weight base 20 with the largest bottom area, the diameter of the bottom surface of the stepped variable cross-section weight base 20 is the same as the diameter of the sample, a plurality of weights 19 are connected to the stepped variable cross-section weight base 20, a level 13 is connected to the top of the compactor 21, and the weights 19 can press the material to a predetermined thickness. The stepped profile is designed to spread the force of the weight 19 evenly over the top of the material so that the uneven force does not cause a difference in the compacted density of the material.
The level 13 can control the upper surface of the discrete material 7 to be in a horizontal state, so that the whole plane is uniformly stressed when the next layer of material is laid flatly.
The assembly process of the nondestructive visual bidirectional sealing sample preparation device for the discrete materials comprises the following steps:
selecting a pressure chamber base 1, checking the air tightness of a rubber membrane 2, fastening the bottom of the rubber membrane 2 on a boss of the pressure chamber base 1 through a rubber band 8, forming a second groove 24 on the pressure chamber base 1 around the boss, placing a rubber sealing ring 10 in the second groove 24, forming inner wall grooves 26 on positions of a left valve body 4 and a right valve body 5, which are opposite to the rubber band 8, of the left valve body 4 and the right valve body 5, forming first grooves 25 at the bottoms of the left valve body 4 and the right valve body 5, connecting the first grooves 25 at the bottoms of the left valve body 4 and the right valve body 5 to the rubber sealing ring 10 in a matching manner, butting and folding grooves 17 at two ends of the left valve body 4 with bulges 18 at two ends of the right valve body 5, and hermetically connecting the left valve body 4 and the right valve body 5 through a clamping strip 14; turning the top end of the rubber membrane 2 outwards and sleeving the top peripheries of the left valve body 4 and the right valve body 5, finishing the flattening of the rubber membrane 2, and then sucking air by using an ear sucking ball through an air sucking hole to enable the rubber membrane 2 to be tightly attached to the inner walls of the left valve body 4 and the right valve body 5; preparing a bottom permeable stone 9 and a top permeable stone 11, boiling the bottom permeable stone 9 and the top permeable stone 11 in boiling water, cooling, and then pressing the bottom permeable stone 9 into the boss of the pressure chamber base 1 along the rubber film 2 in a sliding manner.
Meanwhile, the groove 17 on the left valve body 4 is butted and folded with the bulge 18 on the right valve body 5, and then the clamping strip 14 is inserted into the clamping groove 16, so that the left valve body 4 is hermetically connected with the right valve body 5;
the top end of the rubber membrane 2 is turned outwards and sleeved on the peripheries of the tops of the left valve body 4 and the right valve body 5, and the rubber membrane 2 is arranged to be flat and then sucked by an ear suction ball, so that the rubber membrane 2 is tightly attached to the inner walls of the left valve body 4 and the right valve body 5.
The invention relates to a sample preparation method of a discrete material, which is implemented according to the following steps:
and 8, drawing out the clamping strips 14, disassembling the left valve body 4 and the right valve body 5 of the sample preparation cylinder, and completing sample preparation of the discrete sample material.
Through the mode, according to the nondestructive visual bidirectional sealing sample preparation device for the bulk materials, the vertical and annular bidirectional sealing is realized by arranging the grooves and the sealing rings on the base of the pressure chamber and the valve body, so that the rubber film can be kept tightly attached to the inner wall of the split circular molding sample cylinder in the sample loading process without other auxiliary equipment; the valve body is made of transparent materials, and the layered scale marks on the valve body realize visualization of a sample loading process, so that homogeneity and density accuracy of a formed sample are ensured; and the surface level of each layer of samples and the whole sample is ensured; the clamping strips are adopted to connect the left valve body and the right valve body, so that the valve body is easy to disassemble after sample preparation is finished; the elastic rubber layer is wrapped outside the clamping strip, so that the sealing performance of the joint of the valve body is improved; the invention also discloses a sample preparation method of the discrete material, wherein a planer tool with scale marks is adopted to plane the sample and the joint surfaces of all layers of the sample are not layered; completing sample loading under the condition of no damage to the sample; the whole process is operated and finished under a visual environment, and the uniformity of each layer of samples can be ensured.
Claims (10)
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| CN202110990762.0A CN113804523B (en) | 2021-08-26 | 2021-08-26 | Visual sealing sample preparation device, assembly method and sample preparation method for bulk materials |
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| CN202110990762.0A CN113804523B (en) | 2021-08-26 | 2021-08-26 | Visual sealing sample preparation device, assembly method and sample preparation method for bulk materials |
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2021
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| CN113804523B (en) | 2024-03-22 |
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