CN208505765U - A kind of true triaxil tester sliding loading device - Google Patents
A kind of true triaxil tester sliding loading device Download PDFInfo
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- CN208505765U CN208505765U CN201821279853.3U CN201821279853U CN208505765U CN 208505765 U CN208505765 U CN 208505765U CN 201821279853 U CN201821279853 U CN 201821279853U CN 208505765 U CN208505765 U CN 208505765U
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- horizontal
- shell
- horizontal addload
- sliding
- vertical
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Abstract
A kind of true triaxil tester sliding loading device includes a pair of vertical loading frame being arranged oppositely along the vertical direction and a pair of horizontal addload frame being arranged oppositely in the horizontal direction.Vertical loading frame is made of positioning fixture shell, horizontal connection sleeve, vertical guide rod, sliding shaft base, horizontal cross guide rail, bearing housing connecting cross beam and vertical load plate；Horizontal addload frame is made of horizontal addload sliding shell, guide cylinder, horizontal addload plate and horizontal compression groups of springs；Lateral edge level is vertically arranged with backing pin in vertical guide rod, and four vertical guide rods pass through backing pin respectively and are coupled in the backing pin sliding groove of horizontal addload sliding shell for two horizontal addload framves being arranged oppositely in the horizontal direction.Beneficial effect is: the sliding loading method successively retreated using horizontal addload plate, the length of horizontal addload plate can be effectively reduced, it avoids vertical direction and the horizontal direction at the same time in loading procedure with this, the case where load plate in both direction is mutually collided occurs.
Description
Technical field
The utility model belongs to rock-soil mechanics equipment technical field more particularly to a kind of loading device of true triaxil tester.
Background technique
True triaxil tester is a set of advanced instrument for soil mechanical properties triaxial test, and true triaxial loading device is special
Equipment for true triaxial experiment.
The loading device for true triaxial experiment newest at present is generally rigid-flexible composite loading device, in loading procedure
In be easy to appear the phenomenon that load plate is mutually touched, and the phenomenon that load boundary gap is excessive causes true triaxial experimental study
It influences.
Summary of the invention
Purpose of the utility model is to solve existing true triaxil tester sliding loading devices to load during loading
Plate is easy the problem mutually collided and load gap is excessive, and the true triaxil tester sliding for providing a kind of hierarchical level sliding load adds
It carries and sets.
To achieve the goals above, technology used by the utility model the utility model true triaxil tester sliding loading device
Scheme be include a pair of vertical loading frame being arranged oppositely along the vertical direction and a pair of level being arranged oppositely in the horizontal direction
Loading frame.The vertical loading frame is by positioning fixture shell, horizontal connection sleeve, vertical guide rod, sliding shaft base, horizontal cross
Guide rail, bearing housing connecting cross beam and vertical load plate composition；The positioning fixture shell is in horizontal rectangular structure setting, center
Position offers vertical load pilot hole；The horizontal connection sleeve is fixed at two transverse sides of positioning fixture shell
On, it is fixedly installed horizontal cross guide rail on horizontal connection sleeve, the horizontal cross guide rail along horizontal connection sleeve two sides is installed
It is provided with vertical guide rod, sliding shaft base is fixedly installed on vertical guide rod, vertical guide rod is slided by sliding shaft base pacifies
In horizontal cross guide rail, the vertical guide rod in the horizontal cross guide rail of positioning fixture shell two sides is connected by bearing housing
Crossbeam is fixedly connected along longitudinal direction；The vertical load plate, which is fixedly mounted, to be arranged on positioning fixture shell, is set in vertical load plate
There is vertical load guiding axis, is fitted on vertical load pilot hole；
The horizontal addload frame is by horizontal addload sliding shell, guide cylinder, horizontal addload plate and horizontal compression groups of springs group
At；The horizontal addload sliding shell is in Contraband type structure, slides shell, the second level by the first level load being set in together
Load sliding shell and third horizontal addload sliding shell composition；First level load the sliding shell, the second horizontal addload
Vertically horizontal plane two sides same position offers backing pin sliding groove respectively for sliding shell and third horizontal addload sliding shell,
Horizontal addload pilot hole and compressed spring mounting hole are respectively arranged with along vertical plane；The compression bullet of the horizontal addload sliding shell
Guide cylinder is fixedly installed on the inside of spring mounting hole；The horizontal addload plate is mounted in third horizontal addload sliding shell, with water
The vertical plane of flat load sliding shell is arranged in parallel；The horizontal compression groups of springs is by the first compressed spring, the second compressed spring
With the concentric suit setting composition of third compressed spring, it is mounted between horizontal addload plate and horizontal addload sliding shell,
One end is fixedly connected on horizontal addload plate, and the other end is successively fixedly mounted on first level load sliding shell, second respectively
Horizontal addload slides on the compressed spring mounting hole of shell and third horizontal addload sliding shell；It is vertical on the horizontal addload plate
It is provided with horizontal addload guiding axis, is mounted in the horizontal addload pilot hole of horizontal addload sliding shell；
Lateral edge level is vertically arranged with backing pin in the vertical guide rod of the vertical loading frame, and four of vertical loading frame are perpendicular
Pass through the horizontal addload sliding that backing pin is coupled two horizontal addload framves being arranged oppositely in the horizontal direction respectively to guide rod
In the backing pin sliding groove of shell.
The positioning fixture shell is made of the identical half body case opposite direction split of two structures, the setting of halfbody shell side
It picks up the ears, is fixedly connected by picking up the ears.
The horizontal addload pilot hole is arranged along horizontal addload sliding housing vertical face center.
Four groups of horizontal compression groups of springs are evenly arranged between the horizontal addload plate and horizontal addload sliding shell.
On the first level load sliding shell, the second horizontal addload sliding shell and third horizontal addload sliding shell
Compressed spring mounting hole it is successively equal increase, and the diameter with the first compressed spring, the second compressed spring and third compressed spring
It matches.
The diameter of first compressed spring, the second compressed spring and third compressed spring is sequentially increased, wherein the first pressure
The diameter of contracting spring less than the second horizontal addload sliding shell on compressed spring mounting hole diameter, the second compressed spring it is straight
Diameter is less than the diameter of the compressed spring mounting hole on third horizontal addload sliding shell.
The two sides of the horizontal addload plate are provided with side plate.
The distance between backing pin and vertical load plate on the guide rod be respectively greater than first level load sliding shell,
Second horizontal addload slides the thickness of shell and third horizontal addload sliding shell.
The utility model has the beneficial effects that: the sliding loading method successively retreated using horizontal addload plate, Neng Gouyou
Effect reduces the length of horizontal addload plate, avoids vertical direction and horizontal direction at the same time in loading procedure with this, occurs two
The case where load plate on direction is mutually collided.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the utility model；
Attached drawing 2 is the structure front view of the utility model
Attached drawing 3 is the vertical loading frame structural schematic diagram of the utility model；
Attached drawing 4 is the vertical loading frame structure front view of the utility model；
Attached drawing 5 is the horizontal addload frame structural schematic diagram of the utility model；
Attached drawing 6 is the vertical loading frame structure front view of the utility model；
Attached drawing 7 is that the horizontal addload of the utility model slides shell mechanism cross-sectional view；
In attached drawing: vertical loading frame 1, half body case 111, vertical load pilot hole 112, is picked up the ears at positioning fixture shell 11
113, horizontal connection sleeve 12, vertical guide rod 13, backing pin 131, sliding shaft base 14, horizontal cross guide rail 15, bearing housing connect
Connect crossbeam 16, vertical load plate 17, vertical load guiding axis 171, horizontal addload frame 2, horizontal addload sliding shell 21, the first water
Flat load sliding shell 211, the second horizontal addload sliding shell 212, third horizontal addload slide shell 213, backing pin sliding groove
21a, horizontal addload pilot hole 21b, compressed spring mounting hole 21c, guide cylinder 22, horizontal addload plate 23, horizontal addload guiding axis
231, side plate 232, horizontal compression groups of springs 24, the first compressed spring 241, the second compressed spring 242, third compressed spring 243,
Permeable stone 3.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model
Scheme is described in detail in conjunction with the embodiments.
As shown in attached drawing 1-2, the utility model true triaxil tester slides loading device, includes a pair of opposite along the vertical direction
The vertical loading frame 1 and a pair of horizontal addload frame 2 being arranged oppositely in the horizontal direction being arranged；
As shown in attached drawing 3-4, the vertical loading frame 1 is by positioning fixture shell 11, horizontal connection sleeve 12, vertical guiding
Bar 13, sliding shaft base 14, horizontal cross guide rail 15, bearing housing connecting cross beam 16 and vertical load plate 17 form；The positioning
Fixture shell 11 is in horizontal rectangular structure setting, and centre offers vertical load pilot hole 112；The horizontal connection sleeve
12 are fixed in two transverse sides of positioning fixture shell 11, are fixedly installed horizontal cross on horizontal connection sleeve 12
Guide rail 15,15 installation settings of horizontal cross guide rail along 12 two sides of horizontal connection sleeve have vertical guide rod 13, vertical guide rod
Sliding shaft base 14 is fixedly installed on 13, vertical guide rod 13 is slidably mounted on horizontal cross guide rail 15 by sliding shaft base 14
On, the vertical guide rod 13 in 11 two sides horizontal cross guide rail 15 of positioning fixture shell is by bearing housing connecting cross beam 16 along vertical
To being fixedly connected；The vertical load plate 17, which is fixedly mounted, to be arranged on positioning fixture shell 11, and vertical load plate 17 is equipped with
Vertical load guiding axis 171 is fitted on vertical load pilot hole 112；
As shown in attached drawing 3-4, the horizontal addload frame 2 slides shell 21, guide cylinder 22, horizontal addload plate by horizontal addload
23 and horizontal compression groups of springs 24 form；Horizontal addload sliding shell 21 is in Contraband type structure, by be set in together first
Horizontal addload slides shell 211, the second horizontal addload sliding shell 212 and third horizontal addload sliding shell 213 and forms；It is described
First level load sliding shell 211, the second horizontal addload sliding shell 212 and third horizontal addload sliding shell 213 are along upper
Lower horizontal plane two sides same position offers backing pin sliding groove 21a respectively, is respectively arranged with horizontal addload guiding along vertical plane
Hole 21b and compressed spring mounting hole 21c；Fixation is set on the inside of the compressed spring mounting hole 21c of the horizontal addload sliding shell 21
It is equipped with guide cylinder 22；The horizontal addload plate 23 is mounted in third horizontal addload sliding shell 213, outer with horizontal addload sliding
The vertical plane of shell 21 is arranged in parallel；The horizontal compression groups of springs 24 is by the first compressed spring 241,242 and of the second compressed spring
The concentric suit of third compressed spring 243 setting composition, is mounted on horizontal addload plate 23 and horizontal addload slides shell 21
Between, one end is fixedly connected on horizontal addload plate 23, and it is outer that the other end is successively fixedly mounted on first level load sliding respectively
On the compressed spring mounting hole 21c of shell 211, the second horizontal addload sliding shell 212 and third horizontal addload sliding shell 213；
It is vertically installed with horizontal addload guiding axis 231 on the horizontal addload plate 23, is mounted on horizontal addload sliding shell 21
In horizontal addload pilot hole 21b；
Lateral edge level is vertically arranged with backing pin 131, vertical loading frame 1 in the vertical guide rod 13 of the vertical loading frame 1
Four vertical guide rods 13 two horizontal addload framves 2 being arranged oppositely in the horizontal direction are coupled by backing pin 131 respectively
Horizontal addload sliding shell 21 backing pin sliding groove 21a in.
The positioning fixture shell 11 is made of the opposite split of identical half body case 111 of two structures, half body case 111
Side, which is provided with, picks up the ears 113,113 is fixedly connected by picking up the ears.
The horizontal addload pilot hole 21b is arranged along horizontal addload sliding 21 vertical plane center of shell.
Four groups of horizontal compression groups of springs are evenly arranged between the horizontal addload plate 23 and horizontal addload sliding shell 21
24。
The first level load sliding shell 211, the second horizontal addload sliding shell 212 and the sliding of third horizontal addload
Compressed spring mounting hole 21c on shell 213 is successively equal to be increased, and with the first compressed spring 241, the second compressed spring 242 and
The diameter of third compressed spring 243 matches.
The diameter of first compressed spring 241, the second compressed spring 242 and third compressed spring 243 is sequentially increased,
In the first compressed spring 241 diameter less than the second horizontal addload sliding shell 212 on compressed spring mounting hole 21c it is straight
Diameter, the diameter of the second compressed spring 242 are less than the straight of the compressed spring mounting hole 21c on third horizontal addload sliding shell 213
Diameter.
The two sides of the horizontal addload plate 23 are provided with side plate 232.
The distance between backing pin 131 and vertical load plate 17 on the guide rod 13 are respectively greater than first level load and slide
The thickness of dynamic shell 211, the second horizontal addload sliding shell 212 and third horizontal addload sliding shell 213.
Embodiment
As shown in attached drawing 1-7, the utility model true triaxil tester slides the loading procedure and principle of loading device:
The utility model loads vertical load plate 17 by vertical loading frame 1 along the vertical direction, passes through 2 edge of horizontal addload frame
Horizontal direction loading level load plate 23.Wherein, vertical loading frame 1 controls vertical guide rod 13 along level by sliding shaft base 14
The sliding of cross slide way 15 drives the horizontal addload sliding shell 21 of horizontal addload frame 2 to load in the horizontal direction, bearing housing connection
Crossbeam 16 ensures the stability slided along horizontal cross guide rail 15.Wherein, horizontal addload frame 2 horizontal addload sliding shell 21 by
First level load sliding shell 211, the second horizontal addload sliding shell 212 and the third horizontal addload of three layers of suit slide outer
Shell 213, every thickness 2mm are layered pressure by the horizontal compression groups of springs 24 of concentric suit setting, and automatic sliding drives horizontal
Load plate 23 loads in the horizontal direction, wherein the first compressed spring 241 effect first level load sliding shell 211, second is pressed
Contracting spring 242 acts on the second horizontal addload sliding shell 212 and third compressed spring 243 acts on third horizontal addload and slides shell
213.First level load sliding shell 211, the second horizontal addload sliding shell 212 and third horizontal addload slide shell 213
Overlapping is set in together, and limits resistance by the backing pin 131 on the vertical guide rod 13 of vertical loading frame 1 by backing pin sliding groove 21a
Gear, in the downwardly vertical moving process of vertical loading frame 1, the backing pin 131 on vertical guide rod 13 is successively loaded from first level
In the backing pin sliding groove 21a for sliding shell 211, the second horizontal addload sliding shell 212 and third horizontal addload sliding shell 213
It disengages, first level load sliding shell 211, the second horizontal addload sliding shell 212 and third horizontal addload slide shell 213
Successively under the elastic force effect of the first compressed spring 241, the second compressed spring 242 and third compressed spring 243, it is layered along level
Direction is gradually exited.
When the utility model true triaxil tester slides loading device work, the pressure that can be sealed processing should be mounted on
In power room, as shown in attached drawing 1-2, connects two permeable stones 3 installed on a vertical loading frame 1 up and down and be cased with a rubber membrane, rubber
The cuboid sand sample prepared is born in epithelium, big principal stress and intermediate principal stress are added using rigidity during loading
It carries, minor principal stress provides confining pressure by pressure indoor liquid；Experimental stage start-up loading system, with the shifting of horizontal addload plate 23
It is dynamic, push vertical 13 horizontal movement of guide rod；Backing pin 131 on vertical guide rod 13 is with vertical guide rod 13 and vertical load
Plate 17 moves downwardly together, at this point, because the first level of permeable stone 3 and horizontal addload sliding 21 top layer of shell is loaded and slided
Shell 211 is reserved with the distance of 3mm in vertical direction, after backing pin 131 moves down 2mm, can exit completely first level and add
The backing pin sliding groove 21a for carrying sliding shell 211 is lauched smooth move in the effect of the first compressed spring 241 and exits horizontal addload plate 23；
During backing pin 131 is moved down along backing pin sliding groove 21a, permeable stone 3 is most upper with not yet backed off after random horizontal addload plate 23
Vertical range between layer horizontal addload sliding shell 21 is remained not less than 1mm, and permeable stone 3 is avoided to add with top layer level
Sliding shell 21 is carried to collide during loading.Hereafter, backing pin 131, which moves down, is gradually backed out the sliding of the second horizontal addload
The backing pin sliding groove 21a of shell 212 and third horizontal addload sliding shell 213, equally, the second horizontal addload slides shell 212
It is successively lauched in the second compressed spring 242 and the effect of third compressed spring 243 with third horizontal addload sliding shell 213 smooth dynamic
Exit horizontal addload plate 23.Horizontal addload plate 23 reduces the length of horizontal addload plate 23 using the sliding loading method successively retreated
Degree avoids vertical direction and the horizontal direction at the same time in loading procedure with this, and the load plate occurred in both direction is mutually touched
The case where hitting.
It should be pointed out that the technical solution and its improvement of all spirit and scope for not departing from the invention, should all contain
It covers in the protection scope of the invention patent.
Claims (8)
1. a kind of true triaxil tester slides loading device, include a pair of vertical loading frame (1) being arranged oppositely along the vertical direction and
The horizontal addload frame (2) that a pair is arranged oppositely in the horizontal direction, it is characterised in that:
The vertical loading frame (1) is by positioning fixture shell (11), horizontal connection sleeve (12), vertical guide rod (13), sliding
Axle bed (14), horizontal cross guide rail (15), bearing housing connecting cross beam (16) and vertical load plate (17) composition；The locating clip
Having shell (11) is in horizontal rectangular structure setting, and centre offers vertical load pilot hole (112)；The horizontal connection set
Cylinder (12) is fixed in two transverse sides of positioning fixture shell (11), and horizontal connection sleeve is fixedly installed on (12)
Horizontal cross guide rail (15), horizontal cross guide rail (15) installation settings along horizontal connection sleeve (12) two sides have vertical guide rod
(13), it is fixedly installed with sliding shaft base (14) on vertical guide rod (13), vertical guide rod (13) is sliding by sliding shaft base (14)
It is dynamic to be mounted on horizontal cross guide rail (15), the vertical guide rod in positioning fixture shell (11) two sides horizontal cross guide rail (15)
(13) it is fixedly connected along longitudinal direction by bearing housing connecting cross beam (16)；Setting is fixedly mounted fixed in the vertical load plate (17)
On position fixture shell (11), vertical load plate (17) is equipped with vertical load guiding axis (171), is fitted to vertical load and leads
To on hole (112)；
The horizontal addload frame (2) is by horizontal addload sliding shell (21), guide cylinder (22), horizontal addload plate (23) and horizontal pressure
Contracting groups of springs (24) composition；Horizontal addload sliding shell (21) is in Contraband type structure, is added by the first level being set in together
Carry sliding shell (211), the second horizontal addload sliding shell (212) and third horizontal addload sliding shell (213) composition；It is described
First level load sliding shell (211), the second horizontal addload sliding shell (212) and third horizontal addload slide shell
(213) vertically horizontal plane two sides same position offers backing pin sliding groove (21a) respectively, is respectively arranged with water along vertical plane
Flat load pilot hole (21b) and compressed spring mounting hole (21c)；The compressed spring mounting hole of the horizontal addload sliding shell
Guide cylinder (22) are fixedly installed on the inside of (21c)；The horizontal addload plate (23) is mounted on third horizontal addload sliding shell
(213) it in, is arranged in parallel with the vertical plane of horizontal addload sliding shell (21)；The horizontal compression groups of springs (24) is by the first pressure
Contracting spring (241), the second compressed spring (242) and the concentric suit setting composition of third compressed spring (243), are mounted on
Between horizontal addload plate (23) and horizontal addload sliding shell (21), one end is fixedly connected on horizontal addload plate (23), another
End is successively fixedly mounted on first level load sliding shell (211), the second horizontal addload sliding shell (212) and third respectively
Horizontal addload slides on the compressed spring mounting hole (21c) of shell (213)；Water is vertically installed on the horizontal addload plate (23)
Flat load guiding axis (231), is mounted in the horizontal addload pilot hole (21b) of horizontal addload sliding shell (21)；
The interior lateral edge level of vertical guide rod (13) of the vertical loading frame (1) is vertically arranged with backing pin (131), vertical loading frame
(1) the vertical guide rod (13) of four is coupled two levels being arranged oppositely in the horizontal direction by backing pin (131) respectively
In the backing pin sliding groove (21a) of horizontal addload sliding shell (21) of loading frame (2).
2. true triaxil tester as described in claim 1 slides loading device, it is characterised in that: the positioning fixture shell (11) is
It is made of the opposite split of identical half body case (111) of two structures, half body case (111) side is provided with pick up the ears (113), passes through
Pick up the ears (113) be fixedly connected.
3. true triaxil tester as described in claim 1 slides loading device, it is characterised in that: the horizontal addload pilot hole
(21b) is arranged along horizontal addload sliding shell (21) vertical plane center.
4. true triaxil tester as described in claim 1 slides loading device, it is characterised in that: the horizontal addload plate (23) and water
Four groups of horizontal compression groups of springs (24) are evenly arranged between flat load sliding shell (21).
5. true triaxil tester as described in claim 1 slides loading device, it is characterised in that: the first level load sliding is outer
Compressed spring installation in shell (211), the second horizontal addload sliding shell (212) and third horizontal addload sliding shell (213)
Hole (21c) is successively equal to increase, and with the first compressed spring (241), the second compressed spring (242) and third compressed spring (243)
Diameter match.
6. true triaxil tester as described in claim 1 slides loading device, it is characterised in that: the two of the horizontal addload plate (23)
Side is provided with side plate (232).
7. true triaxil tester as claimed in claim 1 or 5 slides loading device, it is characterised in that: first compressed spring
(241), the diameter of the second compressed spring (242) and third compressed spring (243) is sequentially increased, wherein the first compressed spring
(241) diameter of the diameter less than the compressed spring mounting hole (21c) in the second horizontal addload sliding shell (212), the second pressure
The diameter of contracting spring (242) is less than the diameter of the compressed spring mounting hole (21c) in third horizontal addload sliding shell (213).
8. true triaxil tester as described in claim 1 slides loading device, it is characterised in that: the backing pin on the guide rod (13)
(131) shell (211), the second horizontal addload are slided with the distance between vertical load plate (17) respectively greater than first level load
Slide the thickness of shell (212) and third horizontal addload sliding shell (213).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821279853.3U CN208505765U (en) | 2018-08-09 | 2018-08-09 | A kind of true triaxil tester sliding loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821279853.3U CN208505765U (en) | 2018-08-09 | 2018-08-09 | A kind of true triaxil tester sliding loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208505765U true CN208505765U (en) | 2019-02-15 |
Family
ID=65300214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821279853.3U Expired - Fee Related CN208505765U (en) | 2018-08-09 | 2018-08-09 | A kind of true triaxil tester sliding loading device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208505765U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160875A (en) * | 2019-04-22 | 2019-08-23 | 东北大学 | A kind of double-layer concentric loading frame structure suitable for true triaxial test machine |
| CN114184463A (en) * | 2021-12-16 | 2022-03-15 | 广西大学 | Three-way mutual-buckling rolling-sliding type connecting mechanism and connecting method of true triaxial rock sample clamping plate |
-
2018
- 2018-08-09 CN CN201821279853.3U patent/CN208505765U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110160875A (en) * | 2019-04-22 | 2019-08-23 | 东北大学 | A kind of double-layer concentric loading frame structure suitable for true triaxial test machine |
| CN110160875B (en) * | 2019-04-22 | 2021-04-02 | 东北大学 | Double-layer concentric loading frame structure suitable for true triaxial testing machine |
| CN114184463A (en) * | 2021-12-16 | 2022-03-15 | 广西大学 | Three-way mutual-buckling rolling-sliding type connecting mechanism and connecting method of true triaxial rock sample clamping plate |
| CN114184463B (en) * | 2021-12-16 | 2023-10-13 | 广西大学 | Three-way inter-buckling rolling-sliding type connecting mechanism and connecting method for true triaxial rock sample clamping plates |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190215 Termination date: 20190809 |