CN206248617U - Track flaw detection positioner - Google Patents
Track flaw detection positioner Download PDFInfo
- Publication number
- CN206248617U CN206248617U CN201621383037.8U CN201621383037U CN206248617U CN 206248617 U CN206248617 U CN 206248617U CN 201621383037 U CN201621383037 U CN 201621383037U CN 206248617 U CN206248617 U CN 206248617U
- Authority
- CN
- China
- Prior art keywords
- flaw detection
- track
- main part
- ultrasonic probe
- detection positioner
- 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.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 77
- 239000000523 sample Substances 0.000 claims abstract description 64
- 238000009434 installation Methods 0.000 claims abstract description 24
- 230000006378 damage Effects 0.000 claims abstract description 10
- 238000004088 simulation Methods 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 241001669679 Eleotris Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 241000283707 Capra Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 208000037974 severe injury Diseases 0.000 description 1
- 230000009528 severe injury Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model is related to field of traffic, discloses track flaw detection positioner, and track flaw detection positioner includes；Ultrasonic probe (2), track flaw detection locating support (1) for setting the ultrasonic probe (2), track flaw detection locating support (1) includes main part (10), adjust installation portion (20) and running part (40), the adjust installation portion (20) is arranged on the main part (10) so that the ultrasonic probe (2) being arranged in the adjust installation portion (20) is vertically moved and/or transverse shifting relative to the main part (10), the running part (40) is arranged on the bottom (14) of the main part (10) so that track flaw detection positioner can be translated along track, position so as to pass through neatly to adjust ultrasonic probe detects the damage on tongue and railway frog.
Description
Technical field
The utility model is related to field of traffic, in particular it relates to a kind of track flaw detection positioner.
Background technology
With continuing to develop for China's communication, rail transport with its speed of service it is fast, transport capacity is big, cost of transportation
Low advantage and obtained increasing utilization.And how track to be detected a flaw exactly fast, find that track lacks in time
Fall into, becoming most behave technical problem of interest in guarantee rail transport safety.Particularly recent years, in order to improve flaw detection
Operating speed, improves the reliability of flaw detection, is increasingly using ultrasonic wave and track is detected a flaw.
Track is constituted including rail, sleeper, railway roadbed, union piece, track switch etc..Wherein track switch be for make rail vehicle from
One track is transferred to the line connection equipment of another track, and because of its complex structure, stress easily becomes track weak link greatly.
Wherein, as most common common single turnout, it is made up of railway switch, coupling part, three units of railway frog and guard rail.Turn-out track
Device includes stock rail, tongue and switch machine.
Conventional railway frog removes fork and fusion cast frog including rail combined type, and rail combined type removes fork for rail vertically erects incisal bevel
After be assembled into length heart rail and form, fusion cast frog is solid forging heart rail, and track failure detector of the prior art is because of its turnover panel
It is more long and device is integrally heavier after expansion, cause the track such as such as inspection car failure detector to there is the rail wing of bending
On carry out implementation detection.In addition, it is perpendicular cut assembled or solid forging after rail level broaden, flaw detection trolley is because receiving the shadows such as wheel rim or side wheel
Ring, it is impossible to normal detection, easily cause pin-connected panel railway frog missing inspection, it is impossible to effectively realize the comprehensive detection to pin-connected panel railway frog.
Utility model content
The purpose of this utility model is to provide a kind of track flaw detection positioner, and track flaw detection positioner can be effective
Ground is reliably detected a flaw by tongue and/or railway frog etc..
To achieve these goals, the utility model provides a kind of track flaw detection positioner, track flaw detection positioning dress
Put including；Ultrasonic probe, the track flaw detection locating support for setting the ultrasonic probe, the track flaw detection positioning branch
Frame includes main part, adjust installation portion and running part, and the adjust installation portion is arranged on the main part so as to be arranged on institute
The ultrasonic probe stated in adjust installation portion is vertically moved and/or transverse shifting relative to the main part, the walking
Portion is arranged on the bottom of the main part so that track flaw detection positioner can be translated along track.
Preferably, the ultrasonic probe is for multiple and is adapted to detect for track difference hurt.
Preferably, the main part is fluted body, and multiple openings are offered on the top of the main part so as to be arranged on
The ultrasonic probe in the adjust installation portion can therefrom stretch out.
Preferably, the adjust installation portion includes that guide rail and the ultrasonic probe that can be vertically moved along the guide rail are installed
Block, the guide rail is connected across the both sides of the main part, and can be vertically moved along the cannelure on the main part.
Preferably, the ultrasonic probe at least includes that the K2.5 ultrasonic waves launched forward positioned at the main part side are visited
Head, the K2.5 ultrasonic probes positioned at the main part opposite side backward launched, positioned at the main part centre position and forward
K1 ultrasonic probes of transmitting and positioned at the main part centre position and the K0 ultrasonic probes launched downwards.
Preferably, the K2.5 ultrasonic probes are to 20 degree of the main part medial deviation.
Preferably, the running part includes insulating block.
Preferably, track flaw detection positioner also includes simulating test pieces, the simulating test pieces be provided with simulation damage with
Calibrate the set location of the ultrasonic probe.
Preferably, the simulation damages horizontal wire cutting and the use at least included for simulating variable cross-section flange of rail transversal crack
In the flange of rail vertical core that simulation flange of rail point-like is damaged.
Preferably, track flaw detection positioner includes lever.
By above-mentioned technical proposal, because running part can be moved neatly in orbit, and set in adjust installation portion
The ultrasonic probe put can carry out displacement such that it is able to by the position for neatly adjusting ultrasonic probe detect tongue and
Damage on railway frog.
Other features and advantages of the utility model will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is further understood to of the present utility model for providing, and constitutes a part for specification, and following
Specific embodiment be used to explain the utility model together, but do not constitute to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the top view of track flaw detection positioner described in the utility model.
Fig. 2 is the front view of track flaw detection positioner described in the utility model.
Fig. 3 is the use state schematic diagram of track flaw detection positioner described in the utility model.
Description of reference numerals
The 1 track flaw detection ultrasonic probe of locating support 2
3 supersonic reflectoscopes
The top of 10 main part 11
The cannelure of 12 bottom 13
14 15 blocks of opening
The guide rail of 20 adjust installation portion 21
The side installation portion of 22 ultrasonic probe mounting blocks 23
40 levers
50 simulating test pieces
Specific embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described specific embodiment is merely to illustrate and explains the utility model, is not limited to the utility model.
In the utility model, in the case where opposite explanation is not made, the noun of locality for using such as " upper and lower, left and right " is generally
Refer to the upper and lower, left and right shown in refer to the attached drawing；" inside and outside " refers to the inside and outside of the profile relative to each part in itself.
As shown in Figure 1-2, the utility model provides a kind of track flaw detection positioner, track flaw detection positioner bag
Include；Ultrasonic probe 2, the track flaw detection locating support 1 for setting ultrasonic probe 2, track flaw detection locating support 1 include master
Body portion 10, adjust installation portion 20 and running part 40, adjust installation portion 20 are arranged on main part 10 so as to be arranged on regulation and install
Ultrasonic probe 2 in portion 20 is vertically moved and/or transverse shifting relative to main part 10, and running part 40 is arranged on main part 10
Bottom 14 so that the track flaw detection positioner can be translated along track.
By foregoing description, the ultrasonic probe on track flaw detection positioner can be vertically moved and/or horizontal
To movement, it is thus possible to ensure ultrasonic probe position on rail level center line well.Meanwhile, for the ease of carrying out scanning,
Track flaw detection positioner is provided with running part 40, so that track flaw detection positioner can be moved neatly in orbit, and
Remain certain pressure.Can there are abrasion to assembled railway frog using track described in the utility model flaw detection positioner
Wing rail, length heart rail, forging heart rail implement detection comprehensively, and internal hurt is found in time, compensate for detecting a flaw in the prior art small
Car is beyond one's reach effect, improves detection efficient and accuracy, and it is big to solve the angular deviation of hand-held ultrasound probe detection, grasps
The direction and drift angle of ultrasonic probe are variant, and pressure is uneven and easily causes the problem of missing inspection.
Ultrasonic probe 2 is for multiple and is adapted to detect for track difference hurt.Ultrasonic probe can be various, such as monocrystalline
Compressional wave normal probe, twin crystal compressional wave normal probe, monocrystalline transverse wave double-bevel detector.It is unequal in view of the different of tongue type, flange of rail thickness
Situation, the ultrasonic probe chip for being used is also incomplete same.It is preferred that making monocrystalline transverse wave double-bevel detector, and make ultrasonic probe
It is narrower that chip does as far as possible, preferably uses the chip ultrasonic probe of 8*12mm, and probe near field region is smaller ensureing the beginning
Narrower and near surface the resolving power of pulse.
On the basis of above-mentioned technical proposal, main part 10 is fluted body, and multiple is offered on the top 11 of main part 10
Opening 12 so that the ultrasonic probe 2 in adjust installation portion 20 can therefrom stretch out, to connect supersonic reflectoscope 3.
In view of practicality and economy, preferentially using portable weld seam defectoscope, such as institute of Xingtai pioneer ultrasonic electronic Co., Ltd
The model HT-10 of offer.Specifically, the main part 10 is formed as length 300mm or so, width 90mm or so, is highly 106mm
The cubic shaped of left and right, sets opening, so that ultrasonic wave passes through, in addition, both sides can be provided with reinforcing plate to carry below
The bulk strength of high orbit flaw detection locating support 1.When being detected using the portable weld seam defectoscope, each boundary can be made
Face shows four passages, and following four ultrasonic probes are represented respectively by four baselines, and its sound path can be respectively 300mm (K1)
With 250mm (K2.5) 200mm (K0).
Adjust installation portion 20 can be various forms of structures, as long as it can make the ultrasonic probe mounted thereto can
To vertically move and/or transverse shifting.Adjust installation portion 20 is set corresponding to ultrasonic probe 2, that is to say, that each regulation
One ultrasonic probe 2 is installed on installation portion 20.It is preferred that adjust installation portion 20 includes guide rail 21 and can be along the longitudinal direction of guide rail 21
Mobile ultrasonic probe mounting blocks 22, guide rail 21 is connected across the both sides of main part 10, and by side installation portion 23 in width side
To upper limit, can be vertically moved along the cannelure 13 on main part 10.
Ultrasonic probe 2 is at least including being located at the K2.5 ultrasonic probes launched forward the side of main part 10, positioned at main body
The K2.5 ultrasonic probes of the opposite side backward launched of portion 10, visited positioned at the centre position of main part 10 and the K1 ultrasonic waves launched forward
Head and positioned at the centre position of main part 10 and the K0 ultrasonic probes launched downwards.Wherein, front and rear K2.5 ultrasonic probes can
It was found that the defect such as rail head core wound, rail head, the web of the rail, the volume flaw of the flange of rail and special inclination angle are found with K1 ultrasonic probes
The hurts such as crackle, rail head, the web of the rail, the horizontal crackle of the flange of rail, longitudinal crack and special inclination angle are found with K0 ultrasonic probes
The hurts such as crackle.And, using track described in the utility model flaw detection positioner, it is not only able to well visit railway frog
Wound, it is also possible to detected a flaw to tongue, is longitudinally carried out on the basis of tongue inside edge during detection along tongue rail level, you can realized
Detection to above-mentioned hurt, it may be necessary to forward and reverse detection.
Furthermore, it is contemplated that, there is interference ripple, preferably K2.5 ultrasounds to ensure that detection wave beam does not enter the web of the rail in the width of acoustic beam
Ripple probe is to 20 degree of 10 medial deviation of main part.
In the technology of above-mentioned technical proposal, running part 40 includes insulating block.Specifically insulating block can be in main body
It is each under the front and rear fulcrum in portion 10 to install one.In addition, to ensure that track flaw detection positioner is carried out or tuning along consistent direction, it is main
The two sides of the front and rear fulcrum in body portion 10 are provided with block 15, and the block stretches out 10mm or so.
In addition, being provided with block 15 by fasteners such as screws on the side of the main part 10.Specifically, when this practicality is new
Track flaw detection positioner is placed into when on tongue described in type, can be screwed off block 15, is protruded from the downside of main part 10, from
And can be stuck on the rail of side to ensure that flaw detection is easy in track flaw detection positioner straight trip, it is to avoid track flaw detection positioning dress
Put and roll.Can also effectively ensure that coupling is good simultaneously.
As shown in figure 3, track flaw detection positioner also includes simulating test pieces 50, the simulating test pieces 50 are provided with simulation and damage
To calibrate the set location of ultrasonic probe 2.The simulating test pieces 50 can utilize CSK-1A test blocks, the test blocks of CS-1-5, contrast
The test blocks such as GHT-1 test block, GHT-5 test blocks, material object contrast GTS-60 lengthening, it is super by TB/T2658.21-2007 steel rail welding line
Sonic flaw detection operation trials.
In order to further, improve to specific efficiency, tongue rail head, flange of rail simulation hurt reference block, simulation are preferably used
Damage at least include for simulate variable cross-section flange of rail transversal crack horizontal wire cutting 51 and for simulate the flange of rail point-like damage
Flange of rail vertical core 52.
In addition, in order to preferably manipulate track flaw detection positioner, be preferably provided with track flaw detection locating support and held
Handle, in order to human users, pushes.
Using track described in the utility model flaw detection positioner detected, its technical indicator comply fully with TB/T-
2365.21《Rail examination probe technologies condition》TB/T 2340-2012《Multichannel A types show steel rail ultrasonic flaw detecting instrument technology
Condition》Deng related request.And detection accuracy is high, detection speed is fast, is highly suitable for the interval station main track of heavy haul railway and is particularly
The detection of loaded vehicle drawing lines trouble pin-connected panel railway frog, can in time find pin-connected panel railway frog severe injury hidden danger, be prevented effectively from because of pin-connected panel rut
The accident generation that fork cannot be reinforced after fractureing and cause line interruption to influence driving, it is particularly close to main main track or driving
The larger railway frog of degree implements detection, improves the security reliability of track switch, it is ensured that circuit is unimpeded, have received good economic effect
Benefit and social benefit.
Labyrinth according to tongue and its special physical dimension situation, with reference to tongue rail top surface because it is perpendicular cut process etc. into
For irregular rail head shape, lay on the line after need to be fixed on sleeper with fastener or on slide plate and and goat
The characteristics of influence tongue flange of rail such as connection is detected, it is described in the utility model according to the single transmitting-receiving mode in ultrasonic examination principle
Track flaw detection positioner can also be used to detection tongue rail head, the web of the rail and the flange of rail.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, but, the utility model is not limited
Detail in above-mentioned implementation method, in range of the technology design of the present utility model, can be to skill of the present utility model
Art scheme carries out various simple variants, and these simple variants belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the utility model is to each
Possible combination is planted no longer separately to illustrate.
Additionally, can also be combined between a variety of implementation methods of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (10)
1. a kind of track flaw detection positioner, it is characterised in that track flaw detection positioner includes；
Ultrasonic probe (2), track flaw detection locating support (1) for setting the ultrasonic probe (2),
Track flaw detection locating support (1) includes main part (10), adjust installation portion (20) and running part,
The adjust installation portion (20) is arranged on the main part (10) so as to be arranged in the adjust installation portion (20)
The ultrasonic probe (2) vertically moves and/or transverse shifting relative to the main part (10),
The running part is arranged on the bottom (14) of the main part (10) so that track flaw detection positioner can be along rail
Road is translated.
2. track according to claim 1 flaw detection positioner, it is characterised in that the ultrasonic probe (2) is multiple
And it is adapted to detect for track difference hurt.
3. track according to claim 1 flaw detection positioner, it is characterised in that the main part (10) is fluted body,
Multiple openings (12) are offered on the top (11) of the main part (10) so as to be arranged in the adjust installation portion (20)
The ultrasonic probe (2) can therefrom stretch out.
4. track according to claim 3 flaw detection positioner, it is characterised in that the adjust installation portion (20) is including leading
Rail (21) and the ultrasonic probe mounting blocks (22) that can be vertically moved along the guide rail (21), the guide rail (21) are connected across institute
The both sides of main part (10) are stated, and can be vertically moved along the cannelure (13) on the main part (10).
5. track according to claim 3 flaw detection positioner, it is characterised in that the ultrasonic probe (2) is at least wrapped
Include launch forward positioned at the main part (10) side K2.5 ultrasonic probes, positioned at the main part (10) opposite side backward
The K2.5 ultrasonic probes of transmitting, positioned at the main part (10) centre position and the K1 ultrasonic probes launched forward and it is located at
Main part (10) centre position and the K0 ultrasonic probes launched downwards.
6. track according to claim 5 flaw detection positioner, it is characterised in that the K2.5 ultrasonic probes are to institute
State 20 degree of main part (10) medial deviation.
7. track according to claim 1 flaw detection positioner, it is characterised in that the running part includes insulating block.
8. track according to claim 1 flaw detection positioner, it is characterised in that the track flaw detection positioner is also wrapped
Simulating test pieces (50) are included, the simulating test pieces (50) are provided with simulation and damage to calibrate the set location of the ultrasonic probe (2).
9. track according to claim 8 flaw detection positioner, it is characterised in that the simulation to damage at least include to be used for
Simulate the horizontal wire cutting (51) of variable cross-section flange of rail transversal crack and the flange of rail vertical core (52) for simulating the damage of flange of rail point-like.
10. track according to claim 1 flaw detection positioner, it is characterised in that track flaw detection positioner includes
Lever (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621383037.8U CN206248617U (en) | 2016-12-16 | 2016-12-16 | Track flaw detection positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621383037.8U CN206248617U (en) | 2016-12-16 | 2016-12-16 | Track flaw detection positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206248617U true CN206248617U (en) | 2017-06-13 |
Family
ID=59008095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621383037.8U Active CN206248617U (en) | 2016-12-16 | 2016-12-16 | Track flaw detection positioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206248617U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107458419A (en) * | 2017-09-18 | 2017-12-12 | 四川曜诚无损检测技术有限公司 | A kind of rail mother metal flange of rail ultrasonic flaw detecting device |
| CN109212038A (en) * | 2018-11-14 | 2019-01-15 | 北京主导时代科技有限公司 | A kind of rail detector car and its layout system of popping one's head in |
| CN110823144A (en) * | 2019-10-16 | 2020-02-21 | 北京全路通信信号研究设计院集团有限公司 | Indicating rod displacement detecting device for switch machine |
-
2016
- 2016-12-16 CN CN201621383037.8U patent/CN206248617U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107458419A (en) * | 2017-09-18 | 2017-12-12 | 四川曜诚无损检测技术有限公司 | A kind of rail mother metal flange of rail ultrasonic flaw detecting device |
| CN107458419B (en) * | 2017-09-18 | 2023-06-23 | 四川曜诚无损检测技术有限公司 | Ultrasonic flaw detector for rail base metal rail bottom |
| CN109212038A (en) * | 2018-11-14 | 2019-01-15 | 北京主导时代科技有限公司 | A kind of rail detector car and its layout system of popping one's head in |
| CN110823144A (en) * | 2019-10-16 | 2020-02-21 | 北京全路通信信号研究设计院集团有限公司 | Indicating rod displacement detecting device for switch machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206248617U (en) | Track flaw detection positioner | |
| CN105818837B (en) | A kind of rail-defect detector car using automatic centering mode | |
| CN204964448U (en) | Rail failure detection instrument | |
| ES2404354T3 (en) | Procedure and apparatus for ultrasonic on-site inspection of a railroad track | |
| CN102923164B (en) | High-speed rail health monitoring system based on ultrasonic guide wave and wireless network | |
| CN102043015B (en) | Ultrasonic guided wave device and method for detecting defect at rail bottom of steel rail at long distance | |
| CN105946878A (en) | Double-rail flaw detecting car for subway steel rails | |
| US20180011063A1 (en) | System for monitoring the condition of structural elements | |
| WO2006088353A3 (en) | Method and apparatus for detecting flaws in a railhead | |
| JPS61501724A (en) | Method and device for automatically recognizing and detecting discontinuities and abnormalities in railway track rails | |
| CN103175699A (en) | Noise transmission route testing method for railway vehicle | |
| Kenderian et al. | Dynamic railroad inspection using the laser-air hybrid ultrasonic technique | |
| CN101424664A (en) | Rail tread crack ultrasonic detection device and detecting method | |
| DE59904175D1 (en) | METHOD AND DEVICE FOR TESTING A RAILWAY WHEEL | |
| CN106770657A (en) | For the detection method that subway tunnel railway roadbed comes to nothing | |
| CN212989244U (en) | Steel rail nondestructive inspection detection device capable of synchronously detecting welding line and online detection vehicle thereof | |
| CN205317727U (en) | Large -scale double track car centering mechanism of detecting a flaw | |
| CN103364492B (en) | Adjustable weld inspection guided wave probe and using method | |
| CN206362744U (en) | Track flaw detection positioner | |
| CN105445379A (en) | Aligning mechanism of large double-track flaw detection car | |
| US20190293606A1 (en) | Method for ultrasonically inspecting an aluminothermically welded rail joint | |
| CN205958519U (en) | Wheel type probe and ultrasonic transducer are visited to rail ultrasonic wave | |
| CN106959339A (en) | A kind of contactless vacant analysis device and Method of Void | |
| CN206804593U (en) | A kind of contactless vacant analysis device | |
| CN206223984U (en) | A kind of mechanical device of automatic detection shield tunnel liner construction quality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |