CN112432835A - Permeation test sample demoulding device and demoulding method thereof - Google Patents
Permeation test sample demoulding device and demoulding method thereof Download PDFInfo
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- CN112432835A CN112432835A CN202011338977.6A CN202011338977A CN112432835A CN 112432835 A CN112432835 A CN 112432835A CN 202011338977 A CN202011338977 A CN 202011338977A CN 112432835 A CN112432835 A CN 112432835A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A device and a method for demoulding a penetration test sample, wherein the demoulding device comprises: the top surface of the base is fixedly provided with a plurality of vertical guide rods along the circumferential direction; the lifting demolding part comprises a connecting part and a demolding ring, and the connecting part is slidably arranged on the vertical guide rod; the middle of the connecting part is hollowed out to form a matter containing space; the demolding ring is horizontally arranged at the mass containing space of the connecting part, and the inner diameter of the demolding ring is between the inner diameter and the outer diameter of the three-piece mold; the circular supporting seat is arranged at the top of the base and is positioned right below the demoulding ring; the demolding method comprises the following steps: placing a sample with a three-flap mold on a cylindrical base plate of a circular sample support; adjusting the position of the sample on the circular sample support to ensure that the lower edge of the demoulding ring is contacted with the upper outer edge of the three-segment mould, and the demoulding ring is not contacted with the sample; and (4) holding the connecting rod or the outer ring by two hands to apply downward force to the connecting rod or the outer ring, and stripping off to finish demoulding. The invention has the beneficial effects that: the demoulding safety is high, and the sample is complete.
Description
Technical Field
The invention belongs to the technical field of demoulding of a penetration test sample, and particularly relates to a device and a method for demoulding the penetration test sample.
Background
The penetration test is an important penetration test means in the field of rock penetration process and is an effective method for measuring the mechanical property of soil. For the penetration test, the preparation quality of a soil sample has important influence on the test precision and the data reliability, and the existing penetration test demoulding device is rare. The three-petal mold of the traditional remolding soil sample preparation mold is composed of three one-third annular mold petals and a lantern ring, after the sample preparation is completed through layering compaction, the sample is demolded, rigid tools such as scrapers and the like are adopted to guarantee the integrity of the sample, and the mold is pried on the lever principle to carry out vertical demolding, but the three-petal mold is difficult to fall off due to the fact that the soil body is tightly bonded with the mold wall after being compacted, the three-petal mold is usually fallen off in a mode of beating the wall edge, the process can lead to the performance disturbance change of the sample on the one hand, and on the other hand, the edge of the grinding tool is sharp, so that the personal injury is easily caused to an operator under the condition of uneven stress.
The external force is applied to the lantern ring to detach the three-segment mold separately and take out the sample, the sampling method has obvious defects in actual operation, the sample is detached separately, one third of the wall surface is subjected to frictional resistance, the side wall of the sample is easy to deform, and the accuracy of test data is further influenced.
In order to improve the demolding efficiency and avoid human body injury, some researchers have improved the demolding device and demolding method. Application No.: 201620367246.7, Chinese utility model patent and application number named as remolded soil triaxial sample demoulding device: 201610110610.6, the invention is a Chinese patent named "multifunctional three-split mold remover and its method", which all propose improved demolding device and method for the technical problem of demolding triaxial test specimens.
The demoulding device and the demoulding method adopt one-by-one demoulding to avoid the sample bearing larger frictional resistance, and although the method can avoid the sample from being damaged in the demoulding process to a certain extent, the soil sample is easy to deform due to uneven stress when the second and third split moulds are dismantled. So far, no demolding device for remolded soil triaxial samples or penetration samples exists in the market. Therefore, it is an urgent technical problem to be solved by those skilled in the art of rock penetration process to provide a sample demolding device and a new demolding method for penetration test, which can effectively reduce sample damage caused by uneven stress during demolding process.
(1) Because the sample material is different and the mould is inseparable with the sample laminating after vacuum saturation, the demoulding method of commonly using is for exerting upward force to three lamella mould moulds in proper order, and current demoulding mode commonly used uses the artifical manual mould of prizing of rigidity scraper to make it drop, is difficult to control the size of power in specific operation process to lead to the condition such as operator injury.
(2) The traditional manual demolding process is to apply force to different valve molds in a grading manner, but the force application condition when different valves are demolded is difficult to quantify, and the equal force can not be uniformly applied every time, so that the original stress state or the uniform stress state of a sample is difficult to ensure in the demolding process.
(3) In the traditional manual demoulding process, because a rigid tool is mostly used manually to pry the demoulding by a lever principle, the force application size is difficult to control, and the force application direction is difficult to control, the rigid tool is easy to scratch the periphery of a sample in the manual demoulding process, so that the integrity of the sample is damaged.
(4) In the traditional manual demolding process, a rigid tool is used for prying the mold, but in the prying process, the stress area of the mold is too small, the pressure is too large, so that the mold is partially deformed, and the corresponding stress position is sunken, so that the integrity of the mold is damaged, or the function of the mold can be damaged.
Disclosure of Invention
The invention aims to solve the technical problems that the technical defects in manual demoulding operation and the defects of the existing demoulding device and demoulding method are mainly overcome, and provides a novel demoulding device and a novel demoulding method for a sample for a penetration test, which make up the defect that no special demoulding device or demoulding method exists in the demoulding process, have the advantages of improving demoulding safety in the prior art, ensuring sample integrity, avoiding sample damage and the like, thereby ensuring the integrity of the sample after demoulding and improving the success rate of the penetration test.
The invention relates to a sample demoulding device for a penetration test, which is characterized by comprising the following components:
the top surface of the base is fixedly provided with a plurality of vertical guide rods along the circumferential direction and is used for installing a demoulding device;
the lifting type demoulding part comprises a connecting part and a demoulding ring, and the connecting part is slidably arranged on the vertical guide rod, so that the connecting part can vertically lift along the axial direction of the vertical guide rod under the action of external force; the middle of the connecting part is hollow, so that a matter containing space for containing the demoulding ring is formed; the demolding ring is horizontally arranged at the mass containing space of the connecting part, the inner diameter of the demolding ring is between the inner diameter and the outer diameter of the three-piece mold, and the demolding ring is used for demolding the three-piece mold;
the circular supporting seat is arranged at the top of the base and is positioned right below the demoulding ring, and a demoulding space is reserved between the supporting top of the circular supporting seat and the top surface of the base; the orthographic projection of the circular supporting seat on the top surface of the base completely falls into the orthographic projection of the three-split mold on the top surface of the base, so that the movement of the three-split mold is not hindered in the demolding process.
Preferably, the base is a cylindrical chassis, three guide rods are arranged on the top surface of the base along the circumferential direction of the base at equal intervals, the cross sections of the guide rods are circular, and the guide rods are perpendicular to the base.
Preferably, the connecting portion is an outer ring, the outer ring sets up three nesting holes along circumference equidistance for the guide arm to run through, and the nesting hole diameter is less than the thickness of outer ring to suit with the guide arm external diameter, make the outer ring along the horizontal lift of guide arm axial.
Preferably, the inner annular wall of the connecting part is uniformly provided with three connecting rods distributed along the radial direction, the first ends of the connecting rods are connected to the inner annular wall of the outer ring, the second ends of the connecting rods are connected with the outer annular wall of the demoulding ring, and the central axes of the connecting rods and the central axes of the corresponding nesting holes are positioned on the same vertical plane.
Preferably, the circular supporting seat comprises a cylindrical base plate and three cylindrical supporting rods, the cylindrical base plate is horizontally arranged at the center of the base through the three cylindrical supporting rods, the cylindrical base plate is located under the demolding ring, and the outer diameter of the cylindrical base plate is smaller than the inner diameter of the three-piece mold and used for placing a sample which is not demolded.
Preferably, the outer ring, the demoulding ring and the ring gasket are coaxial and are all parallel to the top surface of the base.
The method for demoulding by using the device for demoulding the penetration test sample is characterized by comprising the following steps of:
(1) horizontally lifting the outer circular ring to the highest position of the guide rod, and placing the sample with the three-flap mold on a cylindrical base plate of a circular sample support;
(2) adjusting the position of the sample on the circular sample support to enable the sample to be located in the middle of the demoulding ring, and adjusting the position of the demoulding ring to enable the lower edge of the demoulding ring to be in contact with the upper outer edge of the three-segment mould, and the demoulding ring is not in contact with the sample;
(3) the connecting rod or the outer ring is held by two hands to apply downward force to the connecting rod or the outer ring, and the three-segment mold is simultaneously stripped off on the premise of not damaging the integrity of the sample to complete demolding.
The invention has the beneficial effects that: the defects of demoulding safety, sample integrity and damaged die in the prior art are overcome.
Drawings
FIG. 1 is a schematic structural view of a sample demolding device for permeation test according to the present invention;
FIG. 2 is a bottom view of the cylindrical backing plate and the lower three support rods of the present invention;
FIG. 3 is a schematic structural view of an outer ring of the present invention;
fig. 4 is a detail view of the outer ring of the present invention.
Wherein: 10 is a base; 20 is a round sample support; 30 is a guide rod; 40 is a lifting demoulding part; 210 is a cylindrical backing plate; 220 is a support rod; 410 is an outer ring; 420 is a demoulding ring; 430 is a connecting rod; and 440 are nested holes.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the description of the present invention, it should be noted that the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
With reference to the accompanying drawings:
embodiment 1 a permeation test specimen mold release device according to the present invention includes:
the top surface of the base 10 is fixedly provided with a plurality of guide rods 30 vertical to the top surface of the base along the circumferential direction and used for installing a demoulding device;
the lifting type demoulding part 40 comprises a connecting part and a demoulding ring 420, wherein the connecting part is slidably arranged on the vertical guide rod, so that the connecting part can vertically lift along the axial direction of the vertical guide rod under the action of external force; the middle of the connecting part is hollow, so that a matter containing space for containing the demoulding ring is formed; the demolding ring 420 is horizontally arranged at the mass containing space of the connecting part, the inner diameter of the demolding ring is between the inner diameter and the outer diameter of the three-piece mold, and the demolding ring is used for demolding the three-piece mold;
the circular supporting seat 20 is arranged at the top of the base, is positioned right below the demoulding ring, and leaves a demoulding space between the supporting top and the top surface of the base; the orthographic projection of the circular supporting seat on the top surface of the base completely falls into the orthographic projection of the three-split mold on the top surface of the base, so that the movement of the three-split mold is not hindered in the demolding process.
Preferably, the base 10 is a cylindrical chassis, three guide rods 30 are equidistantly arranged on the top surface of the cylindrical chassis along the circumferential direction of the cylindrical chassis, the cross sections of the guide rods are circular, and the guide rods are perpendicular to the base.
Preferably, the connecting portion is composed of an outer ring 410 and a plurality of connecting rods 430 uniformly arranged along the radial direction, three embedding holes 440 for the guide rods to pass through are equidistantly arranged on the outer ring 410 along the circumferential direction, and the diameter of the embedding holes 440 is smaller than the thickness of the outer ring and is adapted to the outer diameter of the guide rods 30, so that the outer ring 410 horizontally ascends and descends along the axial direction of the guide rods.
Preferably, three radially distributed connecting rods 410 are uniformly arranged on the inner annular wall of the outer ring 410, the first ends of the connecting rods 430 are connected to the inner annular wall of the outer ring, the second ends of the connecting rods are connected to the outer annular wall of the stripper ring 420, and the central axes of the connecting rods and the central axes of the corresponding nesting holes are located on the same vertical plane.
Preferably, the circular supporting seat 20 comprises a cylindrical base plate 210 and three supporting rods 220, the cylindrical base plate 210 is horizontally erected at the center of the base through the three supporting rods 220, the cylindrical base plate is located right below the demolding ring, and the outer diameter of the cylindrical base plate is smaller than the inner diameter of the three-piece mold and is used for placing a sample which is not demolded.
Preferably, the outer ring 410, the stripper ring 420 and the ring gasket 210 are coaxial and parallel to the top surface of the base 10.
Embodiment 2 the sample demoulding device for the permeation experiment comprises a base 10, a lifting demoulding part 40 and a circular supporting seat 30, wherein the base 10 is a cylindrical chassis, the lifting demoulding part 40 is embedded on the base 10 through three guide rods 30, and the lifting demoulding part 40 can lift along the guide rods 30 vertical to the base 10; the lifting type demoulding part 40 comprises a connecting part and a demoulding ring 420, the connecting part is composed of an outer ring 410 and a plurality of connecting rods 430 uniformly distributed along the radial direction, the centre of the outer ring 410 is provided with the demoulding ring 420, the demoulding ring 420 is connected with the outer ring 410 through the three connecting rods 430 radially arranged, the outer ring 410 is uniformly provided with three nesting holes 440, and the nesting holes 440 are circular through holes penetrating through the upper end surface and the lower end surface of the outer ring, so that the outer ring 410 can move up and down on the guide rod 30; the circular sample support 20 is arranged in the center of the base 10, and the orthographic projection of the circular sample support 20 on the top surface of the base completely falls into the orthographic projection of the three-piece mold and the demolding ring on the top surface of the base, so that the mold can vertically and parallelly fall down the sample when demolding, and the sample is not in secondary contact with the sample, and the integrity of the sample is guaranteed.
The base 10 is slidably connected with the outer ring 410 through three guide rods, in specific application, the base 10 is a cylinder with a diameter consistent with that of the outer ring 410 and a certain thickness according to strength, the outer ring 410 is a cylinder with a diameter consistent with that of the base 10 and a certain thickness and height, and the lifting type demolding part 40 is a whole formed by the outer ring 410, the demolding ring 420 and three radially arranged connecting rods 430.
The base 10 is fixedly connected with the guide rod 30, the outer ring 410 is slidably connected with the guide rod 30, and the outer ring can move up and down on the guide rod in a nested structure.
The diameter of the demoulding ring 420 on the outer ring 410 is slightly larger than that of the sample, but is smaller than the outer diameter of the three-split mould, and is between the inner diameter and the outer diameter of the three-split mould, then external force can be applied to the three-split mould when the outer ring 410 moves up and down on the guide rod 30, and adverse effects on the sample can be reduced as much as possible while the three-split mould is ensured to fall off from the sample.
Referring to fig. 1 and 4, a circular sample support 20 is provided on a base 10, a cylindrical pad 210 and three support rods 220 are provided on the circular sample support 20, and the height of the upper surface of the cylindrical pad 210 from the base is consistent with the height of a sample, so that a sufficient space for accommodating three petals is left between the cylindrical pad 210 and the top surface of the base 10; the diameter of the cylindrical backing plate 210 is consistent with that of the sample, the cylindrical backing plate has certain thickness and strength and is not easy to deform, and the supporting rod 220 below the cylindrical backing plate 210 takes the difference between the height of the sample and the thickness of the cylindrical backing plate 210; the support rod 220 is also circular in cross-section.
The outer ring 410 is provided with three embedding holes 440 which are uniformly distributed, the diameters of the embedding holes 440 are matched with the diameter of the guide rod 30, and the embedding holes are mainly used for completing the up-and-down sliding of the outer ring 410 on the support rod 220.
Embodiment 3 the sample demolding device for the permeation test in this embodiment includes a base 10, a lifting type demolding portion 40 and a circular supporting seat 20, where the base 10 is a cylindrical chassis and is slidably connected to an outer circular ring 410 of the lifting type demolding portion 40 through three guide rods 30, the outer circular ring 410 can move up and down along the guide rods 30, a circular sample support 20 is disposed at the center of the base 10, the circular sample support 20 is composed of three support rods 220 and a cylindrical backing plate 210, the lifting type demolding portion 40 is sleeved on the guide rods 30, the lifting type demolding portion 40 is composed of a demolding ring 420 having a size corresponding to that of a sample, three connecting rods 430 and an outer circular ring 410 which are distributed at equal angles, and the outer circular ring 410 and the demolding ring 420 are coaxially disposed and form a whole through the connecting rods 430.
The outer ring 410 is provided with a nesting hole 440 along the circumferential direction for the guide rod 30 to pass through, and the diameter of the nesting hole is adapted to the outer diameter of the guide rod, so that the connecting part can lift along the axial direction of the guide rod.
The diameter of the insertion hole 440 should be slightly smaller than the thickness of the outer ring 410.
The demoulding ring 420 is a solid cylindrical ring made of steel, and the inner diameter of the demoulding ring 420 is slightly larger than the diameter of a demoulding sample and is between the inner diameter and the outer diameter of the three valves.
The outer ring 410 is made of steel and is connected with the guide rod 30 in a nested structure.
The connecting rod 430 connecting the stripper ring 420 and the outer ring 410 is a straight rod made of solid steel, and the length of the connecting rod can vary according to the diameter of the stripper ring.
The guide rod 30 is a steel hollow steel pipe and has a sealed end.
The base 10 is a cylindrical base made of steel to ensure the strength of the device and the center of gravity of the whole test device below.
The circular sample support 20 is connected to the center of the top surface of the base 10, the circular sample support 20 comprises three support rods 220 and a cylindrical base plate 210 arranged at the top of each support rod, the support rods 220 are positioned on the same base circle on the top surface of the base 10, and the base circle is equally divided into three parts, so that the included angles between two adjacent support rods are equal; the cylindrical backing plate horizontal frame is arranged at the tops of the three support rods, the outer diameter of the cylindrical backing plate is consistent with the outer diameter of a sample which is not demoulded, and the height of the upper surface of the cylindrical backing plate from the base is consistent with the height of the sample and is used for placing the sample which is not demoulded.
Embodiment 4 a method for releasing a mold using a device for releasing a permeation test specimen according to the present invention, comprises the steps of:
(1) horizontally lifting the outer circular ring 410 to the highest position of the guide rod 30, and placing the sample with the three-flap mold on the cylindrical backing plate 210 of the circular sample support 20;
(2) adjusting the position of the sample on the circular sample support 20 to be located at the middle position of the demoulding ring 420, and adjusting the position of the demoulding ring 420 to enable the lower edge of the demoulding ring 420 to be in contact with the upper outer edge of the three-part mould, and the demoulding ring 420 is not in contact with the sample;
(3) the connecting rod 430 or the outer ring 410 is held by two hands to apply downward force to the connecting rod, and the three-piece die is simultaneously stripped on the premise of not damaging the integrity of a sample to complete the demoulding.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (7)
1. The utility model provides a penetration test sample shedder which characterized in that includes:
the top surface of the base is fixedly provided with a plurality of vertical guide rods along the circumferential direction and is used for installing a demoulding device;
the lifting type demoulding part comprises a connecting part and a demoulding ring, and the connecting part is slidably arranged on the vertical guide rod, so that the connecting part can vertically lift along the axial direction of the vertical guide rod under the action of external force; the middle of the connecting part is hollow, so that a matter containing space for containing the demoulding ring is formed; the demolding ring is horizontally arranged at the mass containing space of the connecting part, the inner diameter of the demolding ring is between the inner diameter and the outer diameter of the three-piece mold, and the demolding ring is used for demolding the three-piece mold;
the circular supporting seat is arranged at the top of the base and is positioned right below the demoulding ring, and a demoulding space is reserved between the supporting top of the circular supporting seat and the top surface of the base; the orthographic projection of the circular supporting seat on the top surface of the base completely falls into the orthographic projection of the three-split mold on the top surface of the base, so that the movement of the three-split mold is not hindered in the demolding process.
2. A permeation test specimen demold apparatus according to claim 1, wherein: the base is a cylindrical chassis, three guide rods are arranged on the top surface of the base along the circumferential direction of the base at equal intervals, the cross sections of the guide rods are circular, and the guide rods are perpendicular to the base.
3. A permeation test specimen demold apparatus according to claim 2, wherein: the connecting part is composed of an outer ring and a plurality of connecting rods uniformly distributed along the radial direction, three nesting holes for the guide rods to penetrate through are formed in the outer ring at equal intervals along the circumferential direction, the diameter of each nesting hole is smaller than the thickness of the outer ring, and the nesting holes are matched with the outer diameter of the guide rods, so that the outer ring can horizontally lift along the axial direction of the guide rods; the first end of the connecting rod is connected to the inner annular wall of the outer ring, the second end of the connecting rod is connected with the outer annular wall of the demoulding ring, and the central shaft of the connecting rod and the central shaft of the corresponding nesting hole are located on the same vertical plane.
4. A permeation test specimen demold apparatus according to claim 3, wherein: the circular supporting seat comprises a cylindrical base plate and three supporting rods, the cylindrical base plate is horizontally arranged at the center of the base through the three supporting rods, the cylindrical base plate is located under the demolding ring, and the outer diameter of the cylindrical base plate is smaller than the inner diameter of the three-piece mold and used for placing a sample which is not demolded.
5. A permeation test specimen demold apparatus according to claim 4, wherein: the outer circular ring, the demoulding ring and the circular ring gasket are coaxial and are all parallel to the top surface of the base.
6. A penetration test specimen de-molding apparatus as defined in claim 5, wherein: the height from the upper surface of the cylindrical base plate to the base is consistent with the height of the sample.
7. A method for demoulding by using the device for demoulding the penetration test sample as described in any one of the claims 1 to 6, which is characterized by comprising the following steps:
(1) horizontally lifting the outer circular ring to the highest position of the guide rod, and placing the sample with the three-flap mold on a cylindrical base plate of a circular sample support;
(2) adjusting the position of the sample on the circular sample support to enable the sample to be located in the middle of the demoulding ring, and adjusting the position of the demoulding ring to enable the lower edge of the demoulding ring to be in contact with the upper outer edge of the three-segment mould, and the demoulding ring is not in contact with the sample;
(3) the connecting rod or the outer ring is held by two hands to apply downward force to the connecting rod or the outer ring, and the three-segment mold is simultaneously stripped off on the premise of not damaging the integrity of the sample to complete demolding.
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| CN202011338977.6A CN112432835B (en) | 2020-11-25 | 2020-11-25 | Permeation test sample demolding device and demolding method thereof |
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| CN202011338977.6A CN112432835B (en) | 2020-11-25 | 2020-11-25 | Permeation test sample demolding device and demolding method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114323892A (en) * | 2021-11-26 | 2022-04-12 | 扬州大学 | Three lamella moulds tear appearance device open |
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| CN109596399A (en) * | 2018-12-06 | 2019-04-09 | 绍兴文理学院 | A kind of release method of three axis sample of the soil body |
| CN109531798A (en) * | 2019-01-29 | 2019-03-29 | 福州大学 | A kind of three axis sample stripper apparatus of manipulated soil and its release method |
| CN211545786U (en) * | 2019-12-28 | 2020-09-22 | 长安大学 | Safety type demoulding device capable of automatically lifting |
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| CN114323892B (en) * | 2021-11-26 | 2023-10-27 | 扬州大学 | Sample removing device for three-flap die |
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