CN108087180B - Vertical rear bulb vertical shaft extending through-flow water wheel generator set - Google Patents
Vertical rear bulb vertical shaft extending through-flow water wheel generator set Download PDFInfo
- Publication number
- CN108087180B CN108087180B CN201810017162.4A CN201810017162A CN108087180B CN 108087180 B CN108087180 B CN 108087180B CN 201810017162 A CN201810017162 A CN 201810017162A CN 108087180 B CN108087180 B CN 108087180B
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- water
- bulb
- main shaft
- vertical
- water guide
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 230000005484 gravity Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/02—Machines or engines of reaction type; Parts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/006—Sealing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention relates to a vertical rear bulb vertical shaft extending through-flow water turbine generator set, which effectively solves the potential safety hazard of submerged gears and bearings in the bulb, improves the power generation efficiency, and has the structure that a main shaft of a water turbine is connected with a rotating shaft of a horizontal generator through a 90-degree steering power transmission structure, a water guide blade, a rotating wheel and the bulb are sequentially arranged in the center of a shell, the water guide blade connects a water guide cone with the shell of the water guide mechanism to form a water guide structure, and the rotating wheel is provided with the water guide blade in front to form the required annular quantity of an inlet at the lower part of the water turbine; the lower part of the main shaft of the water turbine is provided with a rotating wheel arranged outside the bulb body, the main shaft of the water turbine is vertically arranged in the center of the bulb body through a pushing bearing and a water guiding bearing, the lower part of the pushing bearing is provided with a framework seal and a main shaft seal, a drainage cavity is formed between the framework seal and the main shaft seal, the drainage cavity is communicated with the outside of the shell through a drainage pipe, and water leakage at the main shaft seal is discharged.
Description
Technical Field
The invention relates to power generation equipment, in particular to a vertical post bulb vertical shaft extending through-flow water wheel generator set which is arranged on a water supply pipeline of a cooling tower when residual pressure of industrial circulating water is recovered.
Background
In the energy-saving field of industrial circulating water residual pressure utilization, the vertical shaft extending through-flow type integral unit is used for industrial circulating water residual pressure recovery power generation, and the unit has a compact structure, small occupied area and convenient installation. The existing vertical shaft extension tubular integral unit adopts a traditional front bulb type, the front part of a water turbine runner is provided with a bulb, a group of steering gears are arranged in the bulb, the direction of a main shaft of the water turbine runner is reversed by 90 degrees to form a vertical shaft extension type, and the vertical shaft extension type extends out of a pipeline to be connected with a generator so as to avoid the generator from being wetted and flooded. The rear part of the bulb body is sequentially provided with a water guide blade, a rotating wheel and the like. Such units are typically installed on horizontal pipes without serious problems. However, in practical engineering for generating power by utilizing residual pressure of industrial circulating water, there is often a small available space, and a generator set cannot be installed horizontally, and the generator set must be directly and vertically installed on an upper tower pressure pipeline of a cooling tower, so that the occupation of the generator set is omitted. However, the shaft extension through-flow unit with the traditional structure is only suitable for being installed on a horizontal pipeline, if the unit is installed on a vertical water supply pipeline of an industrial cooling tower, water leakage which cannot be smoothly discharged from a main shaft seal of the unit can occur, the water leakage is gradually accumulated in a bulb body, a reversing gear and a unit bearing are submerged, and then faults of damaging the gear and the bearing frequently occur. The root cause of the problem is that when the unit is vertically installed, the gravity effect causes difficult drainage. Once the main shaft seal is worn, when water leakage occurs, the water leakage can be quickly penetrated through the framework seal and the bearing to be directly collected into the bulb body under the action of gravity. The bearing and the gear are submerged with the increase of accumulated water, so that oil-water mixture is formed to degrade lubricating oil, and the lubrication of the bearing and the gear is damaged, so that the bearing and the gear are damaged. Gravity acts as a main factor accumulated in the bulb body, is an insurmountable natural factor, and is difficult to completely prevent water leakage from entering the bulb body even if a drain pipe is arranged after the main shaft is sealed, so that the improvement and innovation of the structure are necessary.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention aims to provide the vertical rear bulb vertical shaft extending through-flow wheel generator set which can be directly arranged on a water supply pipeline of a cooling tower, so that the potential safety hazard that water leakage is accumulated in a bulb body and a gear and a bearing are submerged is effectively solved, and the problem of improving the power generation efficiency is ensured.
The invention adopts the technical scheme that the unit adopts the arrangement of a rear bulb body, the whole device comprises a shell, the bulb body, a water turbine and a generator, a main shaft of the water turbine is connected with a rotating shaft of a horizontal generator through a 90-degree steering power transmission structure, and a water guide blade, a rotating wheel and the bulb body are sequentially arranged in the center of the shell from bottom to top. The water guide blades connect the water guide cone with the water guide mechanism shell to form a water guide structure, and the water guide blades are arranged in front of the rotating wheel to form the annular quantity required by the inlet A at the lower part of the water turbine; the lower part of the main shaft of the water turbine is provided with a rotating wheel arranged outside the bulb body, the main shaft of the water turbine is vertically arranged in the center of the bulb body through a pushing bearing and a water guide bearing, the lower part of the pushing bearing is provided with a framework seal and a main shaft seal, a water draining cavity is formed between the framework seal and the main shaft seal, the water draining cavity is communicated with the outside of the shell through a water draining pipe, water leakage at the main shaft seal part is discharged, water leakage in a water flowing channel is effectively prevented from leaking into the bulb body, and the use safety and the service life are ensured.
The invention has novel and unique structure, easy installation and use, good use effect, long service life, can effectively utilize residual pressure of industrial circulating water to generate electricity, is energy-saving and environment-friendly, is particularly suitable for being directly installed on a vertical water supply pipeline of a cooling tower, and has good economic and social benefits.
Drawings
Fig. 1 is a front view (partially cut away) of the structure of the present invention.
Description of the embodiments
The following describes the embodiments of the present invention in detail with reference to the drawings.
As shown in figure 1, the unit adopts a rear bulb body arrangement, the whole device comprises a shell, a bulb body, a water turbine and a generator, a main shaft 10 of the water turbine is connected with a rotating shaft of a horizontal generator through a 90-degree steering power transmission structure, a water guide blade 1, a rotating wheel 2 and the bulb body 11 are sequentially arranged in the center of the shell 16 from bottom to top, the water guide blade 1 connects a water guide cone 17-1 with the shell 17 of the water guide mechanism to form a water guide structure, the rotating wheel 2 is arranged in front of the water guide blade to form the required ring quantity of an inlet A at the lower part of the water turbine, the rotating wheel 2 is arranged at the lower part of the main shaft 10 of the water turbine, the main shaft 10 of the water turbine is vertically arranged in the center of the bulb body 11 through a pushing bearing 5 and a water guide bearing 6, a skeleton seal 4 and a main shaft seal 3 are arranged at the lower part of the pushing bearing 5, a water drain cavity 13 is formed between the skeleton seal 4 and the main shaft seal 3, the water drain cavity 13 is communicated with the outside of the shell 16 through a drain pipe 14, water leakage at the main shaft seal 3 is effectively prevented from leaking water in a water flowing channel 16-1 to the bulb body, and the service life is ensured.
The 90-degree steering power transmission structure is characterized in that a horizontal gear 7-1 and a vertical gear 7-2 are meshed together at 90 degrees, the horizontal gear 7-1 is arranged at the upper end part of a main shaft 10 of a water turbine, a transverse power transmission shaft 19 is arranged in the center of the vertical gear 7-2, the transverse power transmission shaft 19 is arranged in a reversing bearing box 8, and one end extending out of the reversing bearing box is connected with a rotating shaft of a generator 12 through a first flange 20.
The water guide cone 17-1, the rotating wheel 2 and the bulb 11 are arranged in sequence from bottom to top to form a mechanism for scientifically utilizing gravity to drain water of the unit.
A blind hole 17-2 is formed in the center of one end of the water guide cone, a sliding bearing 17-3 is arranged in the blind hole, one end of the main shaft 10 of the water turbine extends into the sliding bearing in the blind hole, rigidity of the main shaft of the water turbine is guaranteed, and operation of a unit is safer and more stable.
The shell 16 and the water guide mechanism shell 17 are assembled together up and down through the second flange 15 to form a convenient dismounting structure.
The water guide mechanism shell 17, the shell 16, the bulb 11 and the water guide cone 17-1 form water which enters the water flowing channel 16-1 from the inlet A at the lower part of the water turbine and the end B at the upper part of the shell.
The bulb 11 and the shell 16 are fixedly connected together through the support 9.
The generator 12 is mounted on a support 18 in a lying position.
The structure can be seen that the inlet of the water turbine is provided with the water guide vane 1 with the inclined angle, and water flows through the water guide vane to form the required circulation of the inlet of the rotating wheel. The main shaft of the water turbine is provided with a main shaft seal 3 for preventing water in the flow channel from leaking into the bulb body 11 of the water turbine, and a framework seal 4 for preventing lubricating oil of the bearing 5 from leaking. The bulb 11 is provided with a water guide bearing 6 and a pushing bearing 5 to assist the guide wheels 7-1 and 7-2 to enable the output of the water turbine to rotate 90 degrees, and then the water turbine is vertically extended out of the runner with the main shaft 10 of the water turbine to be connected with the generator 12. Considering that any type of seal is difficult to completely stop water leakage, a water drainage cavity 13 is arranged between the main shaft seal 3 and the framework seal 4, water leakage of the main shaft seal is collected, and the water leakage is discharged to the outside of the water turbine through a water drainage pipe 14.
After the water in the flow channel passes through the main shaft seal 3, a small amount of water leakage enters the drainage cavity 13 at the upper part of the seal, and due to the adoption of the rear bulb structure, accumulated water can be rapidly discharged through the drainage pipe 14 under the action of gravity, so that the safety and the service life of the power generation equipment are ensured.
When the invention is used, the invention is arranged on a cooling tower water pipeline, industrial circulating residual pressure is utilized, industrial circulating water enters the water flow channel 16-1 through the water turbine inlet A, water entering from the water inlet pushes the water turbine to rotate through the inclined water guide blade, the water turbine main shaft 10 is driven to rotate, and the horizontal gear 7-1 and the vertical gear 7-2 drive the transverse power transmission shaft 19 arranged in the reversing bearing box 8 to rotate, thereby driving the generator rotor shaft and the rotor to rotate for generating electricity.
Compared with the prior art, the invention has the following outstanding substantive characteristics and beneficial technical effects:
1. the structural style of the machine set is different from the traditional machine set structural style in that the rear bulb body style is adopted, gravity is scientifically utilized, a water draining cavity with larger volume is arranged, the adverse factors are changed into beneficial factors, the gravity helps the drainage of water leakage, the hidden danger that the bearing and the gear are submerged in the water leakage storage of the machine set is fundamentally solved, the use is safe, the service life is long, and the service life can be prolonged by more than 5 times.
2. The front water guide vanes are added, so that the water flow circulation is facilitated, the power generation efficiency of the water turbine is ensured and improved, and the power generation efficiency is improved by more than 10%.
3. The structure of the rear bulb body and the front water guide vane enables the unit of the invention to have the vertical installation condition, be suitable for being installed on an uplink pressure pipeline to carry out residual pressure power generation, fully utilize the residual pressure of industrial circulating water, effectively reduce the pollution of industrial wastewater to the environment, save energy and protect the environment, be a great innovation on utilizing industrial circulating water power generation equipment, and have good economic and social benefits.
Claims (6)
1. The vertical rear bulb vertical shaft extending through-flow water wheel generator set is characterized in that the 90-degree steering power transmission structure is that a horizontal gear (7-1) and a vertical gear (7-2) are meshed together at 90 degrees, the horizontal gear (7-1) is arranged at the upper end part of the water turbine main shaft (10), a transverse power transmission shaft (19) is arranged in the center of the vertical gear (7-2), the transverse power transmission shaft (19) is arranged in a steering bearing box (8), and one end extending out of the steering bearing box is connected with a rotating shaft of a generator (12) through a first flange (20); a water guide blade (1), a rotating wheel (2) and a bulb body (11) are sequentially arranged in the center of the shell (16) from bottom to top, the water guide blade (1) connects a water guide cone (17-1) with a water guide mechanism shell (17) to form a water guide structure, a blind hole (17-2) is formed in the center of one end of the water guide cone, a sliding bearing (17-3) is arranged in the blind hole, one end of a main shaft (10) of the water turbine extends into the sliding bearing in the blind hole, the rigidity of the main shaft of the water turbine is ensured, and the running of a unit is safer and more stable; the rotating wheel (2) is provided with a front water guide blade to form the required annular quantity of a water turbine inlet (A), the rotating wheel (2) arranged outside the bulb body (11) is arranged at the lower part of the main shaft (10) of the water turbine, the main shaft (10) of the water turbine is vertically arranged in the center of the bulb body (11) up and down through a push bearing (5) and a water guide bearing (6), a framework seal (4) and a main shaft seal (3) are arranged at the lower part of the push bearing (5), a water draining cavity (13) is formed between the framework seal (4) and the main shaft seal (3), the water draining cavity (13) is communicated with the outside of the shell (16) through a water draining pipe (14), water leakage in the main shaft seal (3) is effectively prevented from leaking into the bulb body, and the use safety and the service life are ensured;
when the water turbine is used, the water turbine is arranged on a cooling tower water pipeline, industrial circulating water enters a water flowing channel (16-1) through a water turbine inlet (A), water entering from a water inlet pushes a water wheel to rotate through a water guide blade with an inclined angle to drive a water turbine main shaft (10) to rotate, and a horizontal power transmission shaft (19) arranged in a reversing bearing box (8) is driven to rotate through a horizontal gear (7-1) and a vertical gear (7-2), so that a generator rotor shaft and a rotor are driven to rotate for generating electricity.
2. The vertical rear bulb vertical shaft extending through-flow water wheel generator set according to claim 1, wherein the water guide cone (17-1), the rotating wheel (2) and the bulb (11) are arranged in sequence from bottom to top to form a mechanism for scientifically utilizing gravity to drain water leakage of the generator set.
3. The vertical post bulb vertical shaft extension through-flow wheel generator set according to claim 1, wherein the shell (16) and the water guide mechanism shell (17) are assembled together up and down through the second flange (15) to form a convenient dismounting structure.
4. The vertical post bulb vertical shaft through-flow wheel generator set according to claim 1, wherein the water guide mechanism shell (17), the shell (16), the bulb (11) and the water guide cone (17-1) form a water flowing channel (16-1) for water to enter from the inlet A at the lower part of the water turbine and exit from the end B at the upper part of the shell.
5. The vertical post bulb vertical shaft through-flow wheel generator set according to claim 1, wherein the bulb (11) and the shell (16) are fixedly connected together through a support (9).
6. The vertical post bulb vertical shaft through-flow wheel generator set of claim 1, wherein the generator (12) is mounted on a support (18) in a recumbent manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017162.4A CN108087180B (en) | 2018-01-09 | 2018-01-09 | Vertical rear bulb vertical shaft extending through-flow water wheel generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017162.4A CN108087180B (en) | 2018-01-09 | 2018-01-09 | Vertical rear bulb vertical shaft extending through-flow water wheel generator set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108087180A CN108087180A (en) | 2018-05-29 |
| CN108087180B true CN108087180B (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810017162.4A Active CN108087180B (en) | 2018-01-09 | 2018-01-09 | Vertical rear bulb vertical shaft extending through-flow water wheel generator set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108087180B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915924A (en) * | 2018-08-31 | 2018-11-30 | 天津电气科学研究院有限公司 | A kind of self-contained bulb tubular hydraulic generating set |
| EP3865701B1 (en) * | 2018-09-07 | 2023-12-13 | Kim, Seongsik | Conduit turbine for supporting conduit of water wheel rotational body, and hydroelectric generator having conduit turbines serially provided in multiple levels |
| KR102632641B1 (en) * | 2019-09-12 | 2024-02-02 | 항저우 엘에이치디 인스티튜트 오브 뉴 에너지, 엘엘씨 | Sealed system for marine energy power generation equipment |
| CN111606537B (en) * | 2020-06-11 | 2024-09-03 | 辽宁省环保集团有限责任公司 | High-efficient anaerobic fermentation tank airtight formula end supports agitating unit |
| CN114576206B (en) * | 2022-03-15 | 2024-07-02 | 江苏省江都水利工程管理处 | Automatic desilting visual guide vane device of vertical axial flow pump |
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| US4505638A (en) * | 1981-08-11 | 1985-03-19 | Sugino Machine Limited | Underwater hydraulic motor |
| CN2575320Y (en) * | 2002-10-11 | 2003-09-24 | 钟挺 | Wind power generating apparatus |
| JP2007270738A (en) * | 2006-03-31 | 2007-10-18 | Chugoku Electric Power Co Inc:The | Hydraulic power generator |
| KR20130055723A (en) * | 2011-11-20 | 2013-05-29 | 송길봉 | Centripetal type turbine |
| CN204163920U (en) * | 2014-09-24 | 2015-02-18 | 江西省莲花水轮机厂有限公司 | The cooling system of axle extend through flow type hydraulic turbine guide bearing |
| CN105736218A (en) * | 2016-04-19 | 2016-07-06 | 西华大学 | Horizontal water turbine generator set |
| CN107313889A (en) * | 2017-05-27 | 2017-11-03 | 杨广平 | Vertical self-contained conduit type hydroelectric generating group |
| CN207686893U (en) * | 2018-01-09 | 2018-08-03 | 河南新飞纪元节能科技股份有限公司 | Vertical postposition bulb vertical axis stretches axial-flow hydrogenerator group |
-
2018
- 2018-01-09 CN CN201810017162.4A patent/CN108087180B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505638A (en) * | 1981-08-11 | 1985-03-19 | Sugino Machine Limited | Underwater hydraulic motor |
| CN2575320Y (en) * | 2002-10-11 | 2003-09-24 | 钟挺 | Wind power generating apparatus |
| JP2007270738A (en) * | 2006-03-31 | 2007-10-18 | Chugoku Electric Power Co Inc:The | Hydraulic power generator |
| KR20130055723A (en) * | 2011-11-20 | 2013-05-29 | 송길봉 | Centripetal type turbine |
| CN204163920U (en) * | 2014-09-24 | 2015-02-18 | 江西省莲花水轮机厂有限公司 | The cooling system of axle extend through flow type hydraulic turbine guide bearing |
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| CN107313889A (en) * | 2017-05-27 | 2017-11-03 | 杨广平 | Vertical self-contained conduit type hydroelectric generating group |
| CN207686893U (en) * | 2018-01-09 | 2018-08-03 | 河南新飞纪元节能科技股份有限公司 | Vertical postposition bulb vertical axis stretches axial-flow hydrogenerator group |
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| Publication number | Publication date |
|---|---|
| CN108087180A (en) | 2018-05-29 |
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