CN106760880A - Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure - Google Patents
Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure Download PDFInfo
- Publication number
- CN106760880A CN106760880A CN201611072521.3A CN201611072521A CN106760880A CN 106760880 A CN106760880 A CN 106760880A CN 201611072521 A CN201611072521 A CN 201611072521A CN 106760880 A CN106760880 A CN 106760880A
- Authority
- CN
- China
- Prior art keywords
- level gauge
- undersetting
- ultrasonic radar
- radar water
- gauge support
- 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.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
- E04H12/2284—Means for adjusting the orientation of the post or pole
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The present invention relates to stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, it is characterised in that：Including split type bearing, split type bearing is upper by what is be hinged, undersetting is constituted, upper bracket correspondence is provided with small support arm with the side of the jointed shaft of undersetting, driving oil cylinder I is hinged between small support arm and undersetting lower end, the inner bottom plating of undersetting fixes limited location riser away from the side of jointed shaft, buffer spring is provided with the Horizontal limiting space that spacing riser is formed with the inwall of undersetting, buffering briquetting is provided with the top of buffer spring, the position of the ring flange correspondence buffering briquetting of undersetting upper end is provided with gap, the ring flange upper surface of the upper surface higher than undersetting upper end of briquetting is buffered under buffer spring release conditions.Its reasonable in design, easy to use, the saving cost of overhaul, raising overhaul efficiency, reduction construction risk, while the characteristics of meeting Stability Analysis of Structures, prevents from installing the electricity piece product damaged on ultrasonic radar water-level gauge support in transformation process.
Description
Technical field
Supplementary structure, particularly a kind of stable type hydrology single-column ultrasonic wave thunder are installed with support the present invention relates to hydrology exploration
Up to water-level gauge support supplementary structure, the structure of modification of original hydrology single-column ultrasonic radar water-level gauge support is particularly well-suited to.
Background technology
With society fast development, hydrology prospecting technique progressively to automation, intelligent direction change, but at present also
It is that the infrastructure for there are some traditional cannot be perfect, constrains the development of hydrology prospecting technique, is have impact on hydrlolgic work just
Often carry out and hydrological industry overall image.Infrastructure, existing hydrology single-column ultrasonic radar water are surveyed as the hydrology
Position meter support by main frame body and main frame body top be hinged the lateral arms for installing ultrasonic radar water-level gauge, located at master
The guardrail on support body top, the lightening protection installation in guardrail, lateral arms take-up device etc. are constituted, and main frame body is round steel tubulose,
Main frame body bottom is provided with ring flange, and uniform foundation bolt is connected with well foundation on the ring flange.Its Maintenance and Repair,
There are the following problems for the aspects such as stability：
1st, the installation site of ultrasonic radar water-level gauge is ruined more than 4 meters of main frame body top to prevent non-working person from stealing
The monitoring device of cantilever tip, generally pedal is not set on body frame, so being examined to indicator water gage and other monitoring assemblies
When repairing, workmen falls from high altitude risk, and potential safety hazard is big；
2nd, because ultrasonic radar water-level gauge is arranged on main frame body top, multiple person cooperational is needed when safeguarding, workmen needs
To be cooperated the related tools such as equipment box, main frame, radar probe, battery, solar panels, annex (100 on frame top and ground
Kilogram weight) to frame top guardrail, personnel and related tool return to ground, workload along ladder again after the completion of installation and repairing for transport
It is big with labour intensity；
3rd, main frame body installs river bank in the wild, and running environment is moist, silt when meeting flood in frame body skin of paint and current
Phase mutual friction causes depainting, is influenceed by height and position, and personnel have falling risk when mopping is conserved.
Although there is the above-mentioned danger for using, safeguarding inconvenience in existing hydrology single-column ultrasonic radar water-level gauge support structure
Evil, but existing structure is abandoned, obvious and unrealistic using new supporting structure, it will necessarily cause the substantial amounts of wasting of resources, be
It is infeasible, therefore how to transform existing support and be only the current most important thing, the application is proposed aiming at this problem.
The content of the invention
The purpose of the present invention is to provide a kind of reasonable in design for solving the above problems, easy to use, saving ultrasound
The ripple indicator water gage support cost of overhaul, the stabilization for improving ultrasonic radar water-level gauge support overhaul efficiency, reducing construction risk
Type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, while the characteristics of meeting Stability Analysis of Structures, prevents installation from transforming
The electricity piece product damaged on ultrasonic radar water-level gauge support in journey.
The technical scheme is that：
A kind of stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, it is characterised in that：Including for pacifying
Mounted in the split type bearing of single-column ultrasonic radar water-level gauge support main frame body bottom, the split type bearing by undersetting and with
The upper bracket composition that undersetting is hinged, the upper/lower terminal of the upper and lower bearing is respectively equipped with ring flange, under the upper bracket
The ring flange at end is connected with the ring flange of the upper end of undersetting using multigroup bolt pair, the flange of the lower end of the undersetting
Disk is provided with the anchor (bolt) hole being connected with sunk well foundation, and the ring flange of the upper end of the upper bracket is provided with and single-column ultrasonic wave
The bolt hole of indicator water gage support main frame body bottom connection, the upper bracket correspondence is provided with the side of the jointed shaft of undersetting
Small support arm, is hinged with driving oil cylinder I between the small support arm and undersetting lower end, the inner bottom plating of the undersetting is away from jointed shaft
Side fix limited location riser, Horizontal limiting space, the level are formed between the spacing riser and the inwall of undersetting
Vertically arranged buffer spring is provided with spacing space, the top spiral-lock of the buffer spring has buffering briquetting, the undersetting
Upper end ring flange correspondence buffering briquetting position be provided with gap, under buffer spring release conditions buffer briquetting upper surface
Higher than the upper surface of the ring flange of undersetting upper end.
Above-mentioned stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, the longitudinal direction of the buffering briquetting is cut
Face is T-shaped.
Above-mentioned stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, also including for installed in single-column
Ultrasonic radar water-level gauge support main frame body top and the drive being connected with the lateral arms of single-column ultrasonic radar water-level gauge support
Motivation structure；The drive mechanism is by the driving oil cylinder II arranged vertically, the vertical drawing for being articulated with the cylinder rod end for driving oil cylinder II
Bar, the brace for being articulated with the vertical connecting rod other end, will drive oil cylinder II cylinder body be fixed on single-column ultrasonic radar water-level gauge
Clamping device I on support main frame body, it is fixed in the lateral arms of single-column ultrasonic radar water-level gauge support and and brace
Clamping device II that the other end is hinged, the vertical pull bar of correspondence being fixed on the main frame body of single-column ultrasonic radar water-level gauge support
Fairlead composition.
Above-mentioned stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, the clamping device I is flexibility
Strainer or rigid grasp hoop.
Above-mentioned stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, the clamping device II is flexibility
Strainer or rigid grasp hoop.
Above-mentioned stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, the undersetting and upper bracket
Physical dimension is consistent.
Above-mentioned stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, the undersetting and upper bracket point
Wei not round steel pipe support.
Above-mentioned stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, the fairlead and driving oil cylinder
The base that is rigidly connected is connected between II clamping device I.
The beneficial effects of the invention are as follows：1st, after transforming existing single-column ultrasonic radar water-level gauge support, water level
The main frame body for counting support can be rotated by 90 ° and plane-parallel under the drive of split type bearing, the horizontal branch of water-level gauge support
Arm can refer to Fig. 6 under the drive of drive mechanism from being changed into parallel with main frame body with main frame body is vertical.This structure setting
Facilitate workmen's repair and maintenance, one can complete independently service work, without climbing, effectively ensured Construction and Maintenance people
The personal safety of member, complies fully with the requirement that work high above the ground is returned in national security production more than 2 meters of relevant regulations.2nd, by using
Buffer spring eases up pressing block, when the upper bracket of split type bearing drive main frame body from level to flip vertical in place when, upper branch
The ring flange of seat lower end is first pressed onto on buffering briquetting, is steadily fallen under the support cushioning effect of buffer spring, it is to avoid body frame
Body produces larger vibration, prevents the electricity piece damaged on main frame body, significantly improves stability and reliability.
Brief description of the drawings
Fig. 1 is use state figure of the invention；
Fig. 2 is the structural representation of split type bearing of the invention；
Fig. 3 is the structural representation under the rollover states of split type bearing of the invention；
Fig. 4 is A direction views in Fig. 3；
Fig. 5 is the structural representation of the gentle pressing block of buffer spring in Fig. 4；
Fig. 6 is the structural representation of drive mechanism of the invention；
Fig. 7 is the structural representation that the lateral arms of water-level gauge support are pulled to the present invention main frame body；
Fig. 8 is the schematic diagram that water-level gauge support is in inspecting state；
Fig. 9 is using the working state figure of improved hydrology single-column ultrasonic radar water-level gauge support of the invention.
In figure：1. lateral arms, 2. main frame body, 3. drive mechanism, 301. clamping devices II, 302. braces, 303. erect
Drag link, 304. fairleads, 305. driving oil cylinders II, 306. clamping devices I, 307. be rigidly connected base, 4. split type bearing,
401. upper brackets, 402. undersettings, 403. ring flanges, 404. ring flanges, 405. ring flanges, 406. ring flanges, 407. jointed shafts,
408. small support arms, 409. drive the buffering of oil cylinder I, 410. briquetting, 411. gap, 412. spacing risers, 413. buffer springs.
Specific embodiment
As shown in Fig. 1-Fig. 9, the stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, by for installing
Split type bearing 4 in the bottom of single-column ultrasonic radar water-level gauge support main frame body 2, for installed in single-column ultrasonic radar water
The top of position meter support main frame body 4 and 3 groups of drive mechanism being connected with the lateral arms 1 of single-column ultrasonic radar water-level gauge support
Into.
The split type bearing 4 is made up of undersetting 402 and the upper bracket 401 being hinged with undersetting 402, described upper and lower
The upper/lower terminal of bearing 401,402 is respectively equipped with ring flange, the ring flange 404 and undersetting of the lower end of the upper bracket 401
The ring flange 405 of 402 upper end is connected using multigroup bolt pair, is set on the ring flange 406 of the lower end of the undersetting 402
The ring flange 403 for having the anchor (bolt) hole being connected with sunk well foundation, the upper end of the upper bracket 401 is provided with and single-column ultrasonic wave
The jointed shaft 407 of the bolt hole of the bottom of indicator water gage support main frame body 2 connection, the correspondence of the upper bracket 401 and undersetting 402
Side be provided with small support arm 408, be hinged between the small support arm 408 and the lower end of undersetting 402 driving oil cylinder I 409.Under described
Bearing 402 is consistent with the physical dimension of upper bracket 401, and both are respectively round steel pipe support.The inner bottom plating of the undersetting 402 is remote
Limited location riser 412 is fixed from the side of jointed shaft 407, water is formed between the spacing riser 412 and the inwall of undersetting 402
Spacing space is put down, vertically arranged buffer spring 413, the top of the buffer spring 413 are provided with the Horizontal limiting space
The position that spiral-lock has buffering briquetting 410, the correspondence buffering briquetting 410 of ring flange 405 of the upper end of the undersetting 402 is provided with gap
411, the upper table of the upper surface higher than the ring flange 405 of undersetting upper end of briquetting 410 is buffered under the release conditions of buffer spring 413
Face.The longitudinal cross-section of the buffering briquetting 410 is T-shaped.
The drive mechanism 3 is by the driving oil cylinder II 305 arranged vertically, the cylinder rod end for being articulated with driving oil cylinder II 305
Vertical pull bar 303, be articulated with the other end of vertical connecting rod 303 brace 302, will drive oil cylinder II 305 cylinder body be fixed on
Clamping device I 306 on single-column ultrasonic radar water-level gauge support main frame body 2, it is fixed on single-column ultrasonic radar water-level gauge branch
The clamping device II 301 that is hinged in the lateral arms 1 of frame and with the other end of brace 302, it is fixed on single-column ultrasonic radar water
The fairlead 304 of the vertical pull bar 303 of correspondence on the main frame body 2 of position meter support is constituted.The clamping device I 306 draws for flexible
Tight device or rigid grasp hoop, the clamping device II 301 are flexible strainer or rigid grasp hoop.The fairlead 304 and drive
The base 307 that is rigidly connected is connected between the clamping device I 306 of dynamic oil cylinder II 305.
After by original hydrology single-column ultrasonic radar water-level gauge the support reformation, its normal operating conditions will drive referring to Fig. 7
The driving oil cylinder I 409 of mechanism 3 and split type bearing 4 is removed.
Claims (8)
1. a kind of stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure, it is characterised in that：Including for installing
In the split type bearing of single-column ultrasonic radar water-level gauge support main frame body bottom, the split type bearing is by undersetting and with
The upper bracket composition that bearing is hinged, the upper/lower terminal of the upper and lower bearing is respectively equipped with ring flange, the lower end of the upper bracket
Ring flange be connected using multigroup bolt pair with the ring flange of the upper end of undersetting, the ring flange of the lower end of the undersetting
The anchor (bolt) hole being connected with sunk well foundation is provided with, the ring flange of the upper end of the upper bracket is provided with and single-column ultrasonic wave thunder
Up to the bolt hole of water-level gauge support main frame body bottom connection, the upper bracket correspondence is provided with small with the side of the jointed shaft of undersetting
Support arm, is hinged with driving oil cylinder I between the small support arm and undersetting lower end, the inner bottom plating of the undersetting is away from jointed shaft
Limited location riser is fixed in side, and Horizontal limiting space, the level limit are formed between the spacing riser and the inwall of undersetting
Vertically arranged buffer spring is provided with bit space, the top spiral-lock of the buffer spring has buffering briquetting, the undersetting
The position of the ring flange correspondence buffering briquetting of upper end is provided with gap, and the upper surface that briquetting is buffered under buffer spring release conditions is high
In the upper surface of the ring flange of undersetting upper end.
2. stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure according to claim 1, its feature exists
In：The longitudinal cross-section of the buffering briquetting is T-shaped.
3. stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure according to claim 1, its feature exists
In：Also include for be arranged on single-column ultrasonic radar water-level gauge support main frame body top and with single-column ultrasonic radar water-level gauge
The drive mechanism of the lateral arms connection of support；The drive mechanism by arrange vertically driving oil cylinder II, be articulated with driving oil
The vertical pull bar of the cylinder rod end of cylinder II, the brace for being articulated with the vertical connecting rod other end, will drive oil cylinder II cylinder body fix
In the clamping device I on single-column ultrasonic radar water-level gauge support main frame body, it is fixed on single-column ultrasonic radar water-level gauge support
Lateral arms on and be hinged with the brace other end clamping device II, be fixed on single-column ultrasonic radar water-level gauge support
The fairlead composition of the vertical pull bar of correspondence on main frame body.
4. stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure according to claim 3, its feature exists
In：The clamping device I is flexible strainer or rigid grasp hoop.
5. stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure according to claim 3, its feature exists
In：The clamping device II is flexible strainer or rigid grasp hoop.
6. stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure according to claim 1, its feature exists
In：The undersetting is consistent with the physical dimension of upper bracket.
7. stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure according to claim 1, its feature exists
In：The undersetting and upper bracket are respectively round steel pipe support.
8. stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure according to claim 3, its feature exists
In：The base that is rigidly connected is connected between the fairlead and the clamping device I for driving oil cylinder II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072521.3A CN106760880A (en) | 2016-11-28 | 2016-11-28 | Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611072521.3A CN106760880A (en) | 2016-11-28 | 2016-11-28 | Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106760880A true CN106760880A (en) | 2017-05-31 |
Family
ID=58905453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611072521.3A Withdrawn CN106760880A (en) | 2016-11-28 | 2016-11-28 | Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106760880A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100059366A (en) * | 2008-11-26 | 2010-06-04 | 김종근 | Post structure |
| CN201521915U (en) * | 2009-11-06 | 2010-07-07 | 常州星宇车灯股份有限公司 | Adjustable balancing bracket device |
| CN202017071U (en) * | 2010-11-23 | 2011-10-26 | 浙江昱辉阳光能源有限公司 | Simple and practical crystal bar bracket for silicon single crystal furnace |
| CN203082472U (en) * | 2012-12-19 | 2013-07-24 | 邹小寒 | Universal mounting bracket for supporting, fixing, mounting and adjusting device |
| KR101295982B1 (en) * | 2013-01-31 | 2013-08-13 | 김광일 | Rotary support for street furniture |
| CN203502082U (en) * | 2013-09-09 | 2014-03-26 | 河南安宏信息科技有限公司 | Novel hydrological gauge support |
| CN205367647U (en) * | 2016-02-16 | 2016-07-06 | 福建世纪电缆有限公司 | Cable reel overturning device |
| CN205404856U (en) * | 2016-03-25 | 2016-07-27 | 北京瀚禹信息科技有限公司 | Integration water level monitoring station |
| CN205719174U (en) * | 2016-06-27 | 2016-11-23 | 王淑娟 | Ultrasonic radar water-level gauge mounting bracket |
| CN206290068U (en) * | 2016-11-28 | 2017-06-30 | 王淑娟 | Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure |
-
2016
- 2016-11-28 CN CN201611072521.3A patent/CN106760880A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100059366A (en) * | 2008-11-26 | 2010-06-04 | 김종근 | Post structure |
| CN201521915U (en) * | 2009-11-06 | 2010-07-07 | 常州星宇车灯股份有限公司 | Adjustable balancing bracket device |
| CN202017071U (en) * | 2010-11-23 | 2011-10-26 | 浙江昱辉阳光能源有限公司 | Simple and practical crystal bar bracket for silicon single crystal furnace |
| CN203082472U (en) * | 2012-12-19 | 2013-07-24 | 邹小寒 | Universal mounting bracket for supporting, fixing, mounting and adjusting device |
| KR101295982B1 (en) * | 2013-01-31 | 2013-08-13 | 김광일 | Rotary support for street furniture |
| CN203502082U (en) * | 2013-09-09 | 2014-03-26 | 河南安宏信息科技有限公司 | Novel hydrological gauge support |
| CN205367647U (en) * | 2016-02-16 | 2016-07-06 | 福建世纪电缆有限公司 | Cable reel overturning device |
| CN205404856U (en) * | 2016-03-25 | 2016-07-27 | 北京瀚禹信息科技有限公司 | Integration water level monitoring station |
| CN205719174U (en) * | 2016-06-27 | 2016-11-23 | 王淑娟 | Ultrasonic radar water-level gauge mounting bracket |
| CN206290068U (en) * | 2016-11-28 | 2017-06-30 | 王淑娟 | Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206832245U (en) | A kind of new hydrology measurement apparatus | |
| CN205719174U (en) | Ultrasonic radar water-level gauge mounting bracket | |
| CN206205886U (en) | Underwater platform for exploring sampling or in-situ test | |
| CN206290068U (en) | Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure | |
| CN108680326A (en) | A kind of submarine pipeline junk shock simulation experiment method | |
| CN201666120U (en) | Novel small oil-well repair work platform | |
| CN206514912U (en) | Surcharge water level meter support supplementary structure | |
| CN103321468A (en) | Guyed triangular truss wind measuring tower | |
| CN203502082U (en) | Novel hydrological gauge support | |
| CN204214437U (en) | Profundal zone surface subsidence monitoring device | |
| CN205918214U (en) | Hydrology single -column ultrasonic radar fluviograph support auxiliary structure | |
| CN108489699A (en) | A kind of submarine pipeline junk shock simulation experiment system | |
| CN106760880A (en) | Stable type hydrology single-column ultrasonic radar water-level gauge support supplementary structure | |
| CN204938800U (en) | Tower crane rood beam basis | |
| CN206191228U (en) | Stable form ultrasonic radar fluviograph installing support | |
| CN207078935U (en) | A kind of portable full circle swinging mast loop wheel machine anchor | |
| CN203704829U (en) | Bridge static load experiment displacement monitoring device | |
| CN106193781B (en) | Mechanical device for erecting pole | |
| CN102839949B (en) | Intelligent type oil pumping machine | |
| CN203285134U (en) | Wire-bracing-type triangular truss wind measuring tower | |
| CN106439450A (en) | Stable installation support of ultrasonic radar water level gauge | |
| CN212714689U (en) | Adjustable highway safety protection facility | |
| CN203615910U (en) | Bridge overall displacement warning device | |
| CN215596990U (en) | Pier cap hydraulic lifting rotary type water level gauge support | |
| CN209586262U (en) | A kind of drilling machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170531 |