CN210529777U - High-speed railway goaf foundation simulated power loading model test device - Google Patents
High-speed railway goaf foundation simulated power loading model test device Download PDFInfo
- Publication number
- CN210529777U CN210529777U CN201921091745.8U CN201921091745U CN210529777U CN 210529777 U CN210529777 U CN 210529777U CN 201921091745 U CN201921091745 U CN 201921091745U CN 210529777 U CN210529777 U CN 210529777U
- Authority
- CN
- China
- Prior art keywords
- loading
- model
- baffle
- plate
- speed railway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model relates to a high-speed railway goaf foundation simulated power loading model test device, which comprises a test platform provided with a model groove, wherein two sides of the model groove are wallboards, one side of each wallboard is tightly attached to the test platform, the other side of each wallboard is provided with a plurality of clamping grooves, a test rock-soil body is placed in the model groove, a goaf simulation assembly is arranged in the test rock-soil body, two sides of the test rock-soil body are baffles inserted into the clamping grooves, a loading base is arranged above the test rock-soil body, a loading plate is tiled above the loading base, a track backing plate is arranged above the loading plate, two parallel loading tracks are fixed above the track backing plate, a reaction frame is arranged above the test platform, a downward loading device is arranged on the reaction frame, a rigid beam is connected below the loading device, the test device can insert the baffles into the clamping grooves, the positions of the baffles are fixed and can provide level, and the positions of the, the model groove can accommodate test rock-soil bodies of different sizes.
Description
Technical Field
The utility model relates to a large-scale model test's in collecting space area ground technical field, in particular to high-speed railway collecting space area ground simulation power loading model test device.
Background
With the rapid development of high-speed railways in China, various technical problems are met by laying of high-speed railway lines, and goaf foundations are not always passed through. Therefore, a great deal of research results are urgently needed to support the actual engineering. However, for the research on the related problems of the goaf foundation construction high-speed railway and the like, a large number of model tests are required besides the field test, and then comprehensive and reliable test data are obtained to support the actual engineering.
The invention patent with the publication number of CN 101787716A, a model test device for researching dynamic response and long-term settlement rule of a high-speed railway, which can only test vibration displacement, speed and acceleration of a roadbed and a shallow foundation under the action of high-speed railway cyclic dynamic load, but does not consider deformation of a deeper goaf foundation under the action of cyclic dynamic load accumulation. The utility model discloses a utility model patent of publication No. CN 204405654U, a device that simulation collecting space area was mined out, the device is through inserting in the rubber tube that is full of sand with the hollow tube, and then reaches the purpose that simulates collecting space area mining with putting sand. The device rubber tube is full of sand and is laid horizontally, sand is under the action of the dead weight pressure of the upper soil layer, the mobility is not large, the steps of operation difficulty are not clear, the test effect is not good, the device can only simulate a shallow goaf, but the device cannot simulate the effect influence of high-speed rail circulation dynamic load on a goaf foundation.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a high-speed railway collecting space area ground simulation power loading model test device.
The technical scheme of the utility model is that: a high-speed railway goaf foundation simulated dynamic loading model test device comprises a test platform, wherein the test platform is provided with a model groove, two sides of the mould groove are provided with wall plates, one side of each wall plate is tightly attached to the test platform, the other side of each wall plate is provided with a plurality of clamping grooves which are horizontally, uniformly and vertically arranged, a quadrate test rock-soil body is placed in the model groove, a goaf simulation assembly is arranged in the test rock-soil body, the two sides of the test rock-soil body are provided with baffle plates inserted into the clamping grooves, a loading base with a prismoid structure is arranged above the test rock-soil body, a loading plate is flatly laid above the loading base, a track base plate is arranged above the loading plate, two parallel loading tracks are fixed above the track base plate, and a reaction frame crossing the model groove is arranged above the test platform, a downward loading device is arranged on the reaction frame, and a rigid beam crossing the loading track is connected below the loading device.
Preferably, wave absorbing materials are arranged on the inner side of the wall plate and the inner side of the baffle plate.
Preferably, the goaf simulation assembly comprises a water storage bag positioned inside the test rock-soil body, one end of the water storage bag is a water inlet pipe penetrating through one side baffle, the other end of the water storage bag is a water outlet pipe penetrating through the other side baffle, and a flow meter and a valve are mounted on the water outlet pipe.
Preferably, the wall plate is a concrete slab with steel bars arranged inside.
Preferably, the loading device is an actuator.
Preferably, the reaction frame includes that both sides fix the stand on test platform and span the crossbeam in model groove, the stand with the crossbeam is hollow structure, the below of crossbeam is the mounting panel, the middle part of mounting panel is equipped with the spout, be equipped with the jib of T shape in the spout, the horizontal pole of jib is located the mounting panel top the montant of jib passes the spout, the lower extreme of montant is fixed with the connecting plate, the connecting plate with the mounting panel passes through bolted connection, the mounting panel is in the both sides of spout set up the reservation bolt perforation of a plurality of equipartitions, the actuator with connecting plate fixed connection.
Preferably, an inclined strut is connected between the upright post and the cross beam, a bottom plate at the bottom of the upright post is fixed on the test platform through a bolt, and a plurality of uniformly distributed rib plates are connected between the bottom plate and the upright post.
Preferably, the outer side surface of the baffle is provided with uniformly distributed cross braces, and the baffle is provided with reserved pipe holes for the water inlet pipe and the water outlet pipe to penetrate through.
Preferably, the outer side of the baffle is provided with a support frame, the support frame comprises a support frame support, a support rod and a support plate, the support frame is fixed at the bottom of the model groove, one side of the support plate is tightly attached to the outer side surface of the baffle, the other side of the support plate is provided with a connecting seat, one end of the support rod is fixedly connected with the support frame, and the other end of the support rod extends upwards in an inclined mode and is hinged.
Preferably, the supporting plate is located between the two crossbars, and a rubber cushion is arranged on the surface of the supporting plate, which is in contact with the baffle.
The utility model has the advantages that:
the utility model discloses set up the model groove and set up the draw-in groove on the wallboard in model groove, can insert the baffle in the draw-in groove, make baffle rigidity and can provide horizontal counter-force, the position of baffle can be according to the position regulation of draw-in groove moreover, and the model groove can hold not unidimensional experimental ground body.
The loading base, the loading plate, the track base plate and the loading track above the rock-soil body to be tested respectively simulate a high-speed rail roadbed, a concrete base, a track plate and a high-speed rail track, and can effectively simulate the real working condition of the high-speed rail.
The utility model discloses all be equipped with absorbing material in the inboard of wallboard and the inboard of baffle, can prevent stress wave resilience.
The utility model discloses set up collecting space area simulation subassembly in experimental ground, collecting space area simulation subassembly adopts the water storage bag to simulate collecting space area, and the water storage bag can be according to utilizing flowmeter and valve control drainage speed to can simulate the evolution process in collecting space area, and the time emptiness of this collecting space area simulation subassembly is strong, the mobility is good, can effectively simulate the evolution law in collecting space area bending zone, and is relatively less to the soil layer disturbance; and the water storage bag can be set to any shape, the plasticity is good, and the goaf under different conditions can be simulated.
The utility model discloses the mounting panel of well crossbeam below sets up the jib, makes things convenient for the actuator adjusting position, is convenient for adjust suitable loading position.
Drawings
Fig. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the present invention in a partial cross-sectional structure;
fig. 3 is a schematic view of the structure of the present invention;
FIG. 4 is a schematic perspective view of the reaction frame;
FIG. 5 is a schematic structural view of the outer side support frame of the baffle;
FIG. 6 is a schematic structural view of a goaf simulating assembly;
in the figure: 1. a test platform; 1-1, wall plates; 1-11, a card slot; 1-12, steel bars; 1-2, a drainage tank; 2. a baffle plate; 2-1, a cross brace; 2-2, hoisting holes; 2-3, reserving pipe holes; 3. testing a rock-soil body; 4. a gob simulation component; 4-1, a water storage bag; 4-2, a water inlet pipe; 4-3, a water outlet pipe; 4-31, flow meter; 4-32, valve; 5. loading a base; 5-1, loading plates; 5-2, a rail backing plate; 5-3, loading a track; 6. an actuator; 6-1, rigid beam; 7. a reaction frame; 7-1, upright columns; 7-11, a bottom plate; 7-2, a cross beam; 7-21, mounting plate; 7-211, a chute; 7-22, a suspender; 7-23, connecting plates; 7-24, actuator backing plate; 7-3, an inclined strut; 8. A support frame; 8-1, a support; 8-2, a support rod; 8-3, a support plate; 8-31, a connecting seat; 8-4 parts of rubber leather pad.
Detailed Description
The specific implementation mode of the utility model is shown in figures 1-6:
the technical scheme of the utility model is that:
a high-speed railway goaf foundation simulated dynamic loading model test device is shown in figures 1-6 and comprises a test platform 1, wherein the test platform 1 is provided with a model groove with two ends penetrating through, two sides of the model groove are provided with wall plates 1-1, the wall plates 1-1 are concrete plates with internal reinforcing steel bars 1-12, one side of the wall plates 1-1 is tightly attached to the test platform 1, the other side of the wall plates 1-1 is provided with a plurality of clamping grooves 1-11 which are horizontally, uniformly and vertically arranged, a quadrate test rock-soil body 3 is placed in the model groove, a goaf simulation assembly 4 is arranged in the test rock-soil body 3, the goaf simulation assembly 4 comprises a water storage bag 4-1 positioned in the test rock-soil body 3, one end of the water storage bag 4-1 is a water inlet pipe 4-2 penetrating through a baffle plate 2 on one side, and the, the water outlet pipe 4-3 is provided with a flowmeter 4-31 and a valve 4-32, two sides of the bottom of the model groove are provided with a water drainage groove 1-2 adjacent to the wall plate 1-1, the slope foot of the water drainage groove 1-2 is not less than 3%, two sides of the test rock-soil body 3 are provided with baffle plates 2 inserted into the clamping grooves 1-11, two hoisting holes 2-2 positioned at two sides are arranged above the baffle plates 2, the baffle plates 2 are made of toughened glass, the outer side surface of the baffle plates 2 is provided with uniformly distributed cross braces 2-1, the baffle plates 2 are provided with reserved pipe holes 2-3 for the water inlet pipe 4-2 and the water outlet pipe 4-3 to pass through, the surfaces around the test rock-soil body 3 are respectively tightly attached to the baffle plates 2 and the wall plates 1-1, the inner sides of the wall plates 1-1 and the inner sides of the baffle plates 2 are provided with wave, the device is characterized in that a loading base 5 with a prismatic table structure is arranged above a test rock-soil body 3, a loading plate 5-1 is flatly laid above the loading base 5, a track base plate 5-2 is arranged above the loading plate 5-1, two parallel loading tracks 5-3 are fixed above the track base plate 5-2, a reaction frame 7 crossing a mold groove is arranged above a test platform 1, a downward loading device is arranged on the reaction frame 7, a rigid beam 6-1 crossing the loading tracks 5-3 is connected below the loading device, the loading device is an actuator 6, the actuator 6 is an electro-hydraulic servo dynamic actuator 6, the actuator 6 is connected with a constant-pressure variable servo oil source and is controlled by a computer, and the loading device can simulate high-speed rails with different speeds and axle weights and can also simulate different waveform high-frequency operation.
The utility model discloses set up draw-in groove 1-11 on wallboard 1-1 in the model groove, can insert baffle 2 in draw-in groove 1-11, make 2 rigidity of baffle and can provide horizontal counter-force, and the position of baffle 2 can be according to draw-in groove 1-11's position control, the model groove can hold not unidimensional experimental ground body 3, loading base 5, loading plate 5-1, track backing plate 5-2, loading track 5-3 above the experimental ground body 3 simulate high-speed railway road bed, concrete base, track board and high-speed railway track respectively, can effectively simulate the true operating mode of high-speed railway.
The utility model discloses still set up collecting space area simulation subassembly 4 in experimental ground body 3, collecting space area simulation subassembly 4 adopts water storage bag 4-1 simulation collecting space area, and water storage bag 4-1 can be according to utilizing flow table 4-31 and valve 4-32 control drainage speed to can simulate the evolution process in collecting space area, and the time emptiness of this collecting space area simulation subassembly 4 is strong, the mobility is good, can effectively simulate the evolution law in collecting space area bending zone, and is relatively less to the soil layer disturbance; and the water storage bag 4-1 can be set to be in any shape, has good plasticity and can simulate goafs under different conditions.
The reaction frame 7 in the utility model comprises a column 7-1 fixed on the test platform 1 at two sides and a beam 7-2 crossing the model groove, the column 7-1 and the beam 7-2 are both hollow structures, an inclined strut 7-3 is connected between the column 7-1 and the beam 7-2, a bottom plate 7-11 at the bottom of the column 7-1 is fixed on the test platform 1 through bolts, a plurality of uniformly distributed rib plates are connected between the bottom plate 7-11 and the column 7-1, a mounting plate 7-21 is arranged below the beam 7-2, a chute 7-211 is arranged at the middle part of the mounting plate 7-21, a T-shaped suspender 7-22 is arranged in the chute 7-211, a cross rod of the suspender 7-22 is positioned above the mounting plate 7-21, a vertical rod of the suspender 7-22 passes through the chute 7-211, the lower end of the vertical rod is fixedly provided with a connecting plate 7-23, the connecting plate 7-23 is connected with a mounting plate 7-21 through bolts, the mounting plate 7-21 is provided with a plurality of uniformly distributed reserved bolt through holes at two sides of a sliding groove 7-211, an actuator 6 is fixedly connected with the connecting plate 7-23, a suspender 7-22 facilitates the adjustment of the position of the actuator 6 and the adjustment of a proper loading position, two sides of an upright post 7-1 are provided with uniformly distributed mounting holes which can adjust the connecting position of a cross beam 7-2, and an actuator base plate 7-24 is connected between the actuator 6 and the connecting plate 7-23.
The utility model discloses in be equipped with support frame 8 in the outside of baffle 2, 8 supports 8-1 of support frame, vaulting pole 8-2 and backup pad 8-3, support 8-1 is fixed at the model tank bottom, 2 lateral surfaces of baffle are hugged closely to one side of backup pad 8-3, the opposite side is connecting seat 8-31, the one end and the support 8-1 fixed connection of vaulting pole 8-2, the other end stretches out upwards to one side and articulates with connecting seat 8-31, backup pad 8-3 is located between two stull 2-1, the surface of backup pad 8-3 and baffle 2 contact is equipped with rubber leather packing 8-4, this support frame 8 can avoid baffle 2 to warp when the loading capacity is great.
The test method of the high-speed railway goaf foundation simulated power loading model test device comprises the following steps:
step 4, discharging water in the water storage bag 4-1 according to the determined time similarity ratio;
and 9, transmitting the result measured by the measuring instrument to computer software for processing and analysis to obtain a test result.
Claims (10)
1. The utility model provides a high-speed railway collecting space area ground simulation power loading model test device, includes test platform, its characterized in that: the test platform is equipped with the model groove, the both sides in model groove are the wallboard, test platform, opposite side are hugged closely to one side of wallboard are equipped with the draw-in groove of a plurality of horizontal equipartitions and vertical setting, the experimental ground body of square has been placed to the model inslot, the inside of experimental ground body is equipped with collecting space area analog component, the both sides of experimental ground body are the baffle that inserts the draw-in groove, the top of experimental ground body is equipped with the loading base of prismatic table structure, the top tiling of loading base has the loading plate, the top of loading plate is the track backing plate, the top of track backing plate is fixed with the loading track of two parallels, test platform's top is equipped with the reaction frame of crossing the model groove, decurrent loading device is erect to the reaction, loading device's below is connected with and spans the orbital rigid beam of loading.
2. The high-speed railway goaf foundation simulated power loading model test device of claim 1, characterized in that: wave-absorbing materials are arranged on the inner sides of the wall plates and the inner sides of the baffle plates.
3. The high-speed railway goaf foundation simulated power loading model test device of claim 2, characterized in that: the goaf simulation assembly comprises a water storage bag positioned inside a test rock-soil body, one end of the water storage bag is a water inlet pipe penetrating through one side baffle, the other end of the water storage bag is a water outlet pipe penetrating through the other side baffle, and a flow meter and a valve are mounted on the water outlet pipe.
4. The high-speed railway goaf foundation simulated power loading model test device of claim 3, wherein: the wallboard is the concrete slab that inside was equipped with the reinforcing bar.
5. The high-speed railway goaf foundation simulated power loading model test device of claim 4, wherein: the loading device is an actuator.
6. The high-speed railway goaf foundation simulated power loading model test device of claim 5, wherein: the reaction frame includes that both sides fix the stand on test platform and span the crossbeam in model groove, the stand with the crossbeam is hollow structure, the below of crossbeam is the mounting panel, the middle part of mounting panel is equipped with the spout, be equipped with the jib of T shape in the spout, the horizontal pole of jib be located the mounting panel top the montant of jib passes the spout, the lower extreme of montant is fixed with the connecting plate, the connecting plate with the mounting panel passes through bolted connection, the mounting panel is in the both sides of spout set up the reservation bolt perforation of a plurality of equipartitions, the actuator with connecting plate fixed connection.
7. The high-speed railway goaf foundation simulated power loading model test device of claim 6, wherein: the testing device is characterized in that an inclined strut is connected between the upright post and the cross beam, a bottom plate at the bottom of the upright post is fixed on the testing platform through a bolt, and a plurality of uniformly distributed rib plates are connected between the bottom plate and the upright post.
8. The high-speed railway goaf foundation simulated power loading model test device of claim 7, wherein: the outside surface of baffle is equipped with the stull of equipartition, the baffle is equipped with the confession the inlet tube with the reservation tube hole that the outlet pipe passed.
9. The high-speed railway goaf foundation simulated power loading model test device of claim 8, wherein: the outer side of the baffle is provided with a support frame, a support frame support, a support rod and a support plate are arranged on the outer side of the baffle, the support frame is fixed to the bottom of the model groove, one side of the support plate is tightly attached to the outer side face of the baffle, the other side of the support plate is a connecting seat, one end of the support rod is fixedly connected with the support frame, and the other end of the support rod extends upwards in an inclined.
10. The high-speed railway goaf foundation simulated power loading model test device of claim 9, wherein: the supporting plate is positioned between the two cross braces, and a rubber leather pad is arranged on the surface of the supporting plate, which is in contact with the baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921091745.8U CN210529777U (en) | 2019-07-12 | 2019-07-12 | High-speed railway goaf foundation simulated power loading model test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921091745.8U CN210529777U (en) | 2019-07-12 | 2019-07-12 | High-speed railway goaf foundation simulated power loading model test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210529777U true CN210529777U (en) | 2020-05-15 |
Family
ID=70597729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921091745.8U Expired - Fee Related CN210529777U (en) | 2019-07-12 | 2019-07-12 | High-speed railway goaf foundation simulated power loading model test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210529777U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409518A (en) * | 2019-07-12 | 2019-11-05 | 河南理工大学 | A kind of high-speed railway goaf ground intends power stress model experimental rig and method |
| CN113293808A (en) * | 2021-05-24 | 2021-08-24 | 中国电建市政建设集团有限公司 | Test device and method capable of simulating foundation pit retaining wall displacement to induce wall rear soil body deformation |
| CN113373992A (en) * | 2021-06-23 | 2021-09-10 | 唐春梅 | Roadbed settlement test platform for road and bridge transition section |
| GB2596165A (en) * | 2019-07-12 | 2021-12-22 | Univ Henan Polytechnic | High-speed railway goaf foundation pseudo-dynamic loading model test apparatus and method |
| CN115492174A (en) * | 2022-09-15 | 2022-12-20 | 中南大学 | High-speed railway roadbed full-scale model test device and method |
-
2019
- 2019-07-12 CN CN201921091745.8U patent/CN210529777U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409518A (en) * | 2019-07-12 | 2019-11-05 | 河南理工大学 | A kind of high-speed railway goaf ground intends power stress model experimental rig and method |
| WO2021008278A1 (en) * | 2019-07-12 | 2021-01-21 | 河南理工大学 | High-speed railway goaf foundation pseudo-dynamic loading model test apparatus and method |
| GB2596165A (en) * | 2019-07-12 | 2021-12-22 | Univ Henan Polytechnic | High-speed railway goaf foundation pseudo-dynamic loading model test apparatus and method |
| GB2596165B (en) * | 2019-07-12 | 2023-08-16 | Univ Henan Polytechnic | Pseudo-dynamic loading model test apparatus and method for high-speed railway foundation in mined-out area |
| CN113293808A (en) * | 2021-05-24 | 2021-08-24 | 中国电建市政建设集团有限公司 | Test device and method capable of simulating foundation pit retaining wall displacement to induce wall rear soil body deformation |
| CN113373992A (en) * | 2021-06-23 | 2021-09-10 | 唐春梅 | Roadbed settlement test platform for road and bridge transition section |
| CN115492174A (en) * | 2022-09-15 | 2022-12-20 | 中南大学 | High-speed railway roadbed full-scale model test device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021008278A1 (en) | High-speed railway goaf foundation pseudo-dynamic loading model test apparatus and method | |
| CN210529777U (en) | High-speed railway goaf foundation simulated power loading model test device | |
| CN102493500B (en) | Foundation base model test device capable of bidirectional loading | |
| WO2020206759A1 (en) | Coal fault formation simulation test apparatus, and forward and reverse fault simulation test methods | |
| CN104880396B (en) | The soil body two is to flow model in porous media device and method of testing under outside charge function | |
| CN107354961B (en) | Variable-rigidity pre-stressed anchor-pull type retaining wall soil arch effect test model device and method | |
| CN110940571B (en) | Test device for simulating dynamic soil arch effect of shed frame structure | |
| CN105926686A (en) | Centrifugal model testing system and method studying common character of composite foundation and support structure | |
| CN110849790B (en) | Constant water head static load pile bearing type roadbed seepage erosion test device | |
| CN112964563A (en) | Simulation box for simulating long-term tunnel settlement under subway operation load and test method | |
| CN110231115B (en) | Device and method for simulating surrounding rock plastic zone development and fluid lining structure mechanical response under different supporting forces | |
| CN107024574A (en) | A kind of soil arching effect simulation test device and test method | |
| CN110987607B (en) | Nested multi-coupling model test system and test method for dam body of coal mine underground reservoir | |
| CN111089799A (en) | Vertical loading test device and test method for indoor model pile | |
| CN106193330B (en) | A kind of steel building construction land tenure foot bolt pre-embedded construction method | |
| CN106193094B (en) | A kind of embedding anchor bolts construction mould and foundation bolt adjust construction method | |
| CN113776965A (en) | Simulation test device and method for culvert soil arch change rule under load action | |
| CN102828531A (en) | System and construction method for realizing digging and measuring of diaphragm wall trench in geotechnical centrifugal model test | |
| CN112575762A (en) | Multifunctional test device and method for simulating foundation load | |
| GB2596165A (en) | High-speed railway goaf foundation pseudo-dynamic loading model test apparatus and method | |
| CN205636834U (en) | Centrifugal model testing system of research composite foundation and common property of supporting construction | |
| CN116446470A (en) | Pile-supporting embankment model test device and method under rainfall and dry-wet circulation effects | |
| CN115753376A (en) | Multi-scene simulation miniature pile reinforcement model test device | |
| CN104458177B (en) | Earthquake simulation shaking table test bearing model counterweight device and construction method thereof | |
| CN214408964U (en) | Soil slope filling process simulation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200515 Termination date: 20210712 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |