CN109611344A - A kind of electric submersible pump - Google Patents
A kind of electric submersible pump Download PDFInfo
- Publication number
- CN109611344A CN109611344A CN201910001424.2A CN201910001424A CN109611344A CN 109611344 A CN109611344 A CN 109611344A CN 201910001424 A CN201910001424 A CN 201910001424A CN 109611344 A CN109611344 A CN 109611344A
- Authority
- CN
- China
- Prior art keywords
- magneto
- shell
- outer housing
- volute
- oil
- 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.)
- Pending
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 11
- 239000000565 sealant Substances 0.000 claims description 7
- 230000037452 priming Effects 0.000 claims description 6
- 238000004880 explosion Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 41
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 4
- VQAPWLAUGBBGJI-UHFFFAOYSA-N [B].[Fe].[Rb] Chemical compound [B].[Fe].[Rb] VQAPWLAUGBBGJI-UHFFFAOYSA-N 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
- F04D13/064—Details of the magnetic circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of electric submersible pump is made of shell and setting in the intracorporal driving motor of shell；The shell is made of superposed outer housing, the volute positioned at lower part and pedestal, is a flange-interface at the top of the outer housing, and the peripheral portion of outer housing is equipped with symmetrical unloading port；The driving motor is a totally enclosed magneto, the magneto is arranged in the same main cavity that the outer housing being separately connected above and below by a connecting seat and volute are constituted, the main body of the magneto is located in attachment base upper case body, and the oil plant output cavity with outer housing composition electric oil pump；The output shaft of the magneto then pass through attachment base protrude into lower part volute it is intracavitary, and by be arranged in magneto output end impeller and volute bottom pedestal under shed constitute electric oil pump oil plant suction chamber.
Description
Technical field
The present invention relates to a kind of electric submersible pumps, belong to conveying equipment for fluid substances device class, are particularly suitable for petrochemical industry row
The handling of the liquid type material loaded in industry to tank car are used.
Background technique
It is all made of top emptying in China railways tank car unloading oils, is that vacuum oil discharging by pumping work is added using centrifugal pump in early days
Tank car oil product is led to centrifugal pump inlet in such a way that water ring vacuum pump vacuumizes, then is transported to oil storage tank by centrifugal pump by skill,
Belong to negative pressure vacuurn-centrifugal pump, there are two distinct disadvantages for the vacuurn-centrifugal pump:
One, emptying is easy to produce gasification phenomenon under negative pressure, and there are gas choked flow in petroleum pipeline, there are gas for centrifugal pump
Erosion and air-resistance phenomenon, cisco unity malfunction；
Two, a large amount of gas mixtures will be discharged in water ring vacuum pump in the process of running, exist it is very big it is environmentally friendly, safety is hidden
Suffer from.
Therefore, gradually add the technique of centrifugal pump to replace by Hydrodynamic oil-diving pump after the technique, Hydrodynamic oil-diving pump is inserted into tank car
Oil liquid is pumped into centrifugal pump inlet and is transported to oil storage tank again or is pumped directly into oil storage tank, belongs to positive pressure emptying work by bottom
Skill；The cavitation erosion and vapour lock during centrifugation oil discharging by pumping can be effectively solved, discharge velocity is greatly speeded up, there is peace compared with traditional handicraft
Entirely, the advantage of energy-saving and environmental protection.The technique was widely applied at past more than 20 years.
But there is also some disadvantages for Hydrodynamic oil-diving pump vacuurn-centrifugal pump:
First is that efficiency is low (though than traditional handicraft energy conservation) because by multiple electric energy --- hydraulic energy --- mechanical energy energy
Conversion process is measured, there are energy losses；
Second is that there is hydraulic fluid leak, rotten and contaminated product；
Third is that hydraulic oil low temperature flow is poor in north cold area, hydraulic system operation troubles is more.
Therefore, the above problem present in railway tank car unloading oils technical process how is solved, is always that the sector is uncommon
Hope the important technological problems solved.
Summary of the invention
It is an object of the present invention to provide one kind can overcome the straight of defect existing for above-mentioned existing tank car loading and unloading oils equipment
It connects with motor-driven oil-immersed pump.
This electric submersible pump is made of shell and setting in the intracorporal driving motor of shell, and the shell is upper by being located at
The outer housing 3 in portion, the volute 9 positioned at lower part and pedestal 10 are constituted, and are a flange-interface 1, outer housing at the top of the outer housing
Peripheral portion be equipped with symmetrical unloading port A；The driving motor is a totally enclosed magneto 4, the permanent magnetism
Motor 4 is arranged in the same main cavity that the outer housing 3 being separately connected above and below by a connecting seat 13 and volute 9 are constituted, it is described forever
The main body of magneto 4 is located in 13 upper outer shell 3 of attachment base, and the oil plant output cavity B of electric oil pump is formed with outer housing 3；
The output shaft of the magneto 4 then pass through attachment base 13 protrude into lower part volute it is intracavitary, and by be arranged it is defeated in magneto
The under shed D of the pedestal 10 of 9 bottom of impeller 12 and volute of outlet constitutes the oil plant suction chamber C of electric oil pump.
Preferably, the magneto 4 include: motor housing 27, upper end cover 17, lower cover 21, bearing 16, stator around
Group 25, rotor 26, permanent magnet 24；The stator winding 25, rotor 26 are encapsulated in by motor housing 27 and upper end cover
17, in the cavity that lower cover 21 is constituted, the rubidium iron boron permanent magnet 24 is arranged in regularly on the outer peripheral surface of rotor windings 25,
The stator winding 25 is encapsulated by the electric insulating sealant 23 of priming by vacuum；The both ends of the rotor 26 are equipped with outside framework oil seal
23, one end of the stator winding 25 is equipped with the extraction cable 15 drawn.
Preferably, the charge of oil mouth A being symmetrical set is equipped with closure plate 6.
Preferably, the periphery of the extraction cable 15 is equipped with cable sheath tube 30, the cable sheath tube 30 and extraction
It is also encapsulated by the electric insulating sealant of priming by vacuum 23 between cable 15, the other end of the cable pigtail 15 then connects with electrode
Line end 31 connects, and constitutes conductive channel；30 upper end of cable sheath tube and extraction cable 15 are by being furnished with the spiral shell of gasket 29
Cap 28 fastens.
According to this electric submersible pump that above technical scheme proposes, have the following characteristics that
1, pump is coaxial, motor direct-drive pump operation, eliminates energy conversion links, and efficiency greatly improves.
2, run that low with maintenance cost, there is no leakages and contaminated product problem, especially aviation kerosine to unload.
3, its motor of traditional pump is using induction machine, and volume is big, and magnetic is drawn in energization will consume portion of energy, using neodymium iron
Boron NdFeB Permanent Magnets motor volume is small, and without drawing magnetic, the temperature rise in energy consumption and operational process is smaller.
4, the explosion-proof type structural formula that motor adds glue to seal using special flame proof, security reliability are high.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is permanent magnet motor structure schematic diagram；
Fig. 3 is motor encapsulation portion structural schematic diagram；
Fig. 4 is the overall structure diagram under another working condition of the invention.
In figure: 1- flange 2- flow deflector 3- outer housing 4- magneto 5- movable buckle 6- closure plate 7-O type circle 8-
Bolt 9- volute 10- pedestal 11- gasket 12- impeller 13- attachment base 14- mechanical sealing member 15- extraction cable 16-
Bearing 17- upper end cover 18- outside framework oil seal 19- explosion suppresion surface 20- grounding screw 21- lower cover 22- motor output shaft 23-
Electric insulating sealant 24- permanent magnet 25- stator winding 26- rotor 27- motor housing 28- fastening nut 29- sealing
Pad the lower part 30- cable cover(ing) 31- electrode terminal A- unloading port B- oil plant output cavity C- oil plant suction chamber D- oil inlet.
Specific embodiment
The present invention is further described below in conjunction with Figure of description, and provides the embodiment of the present invention.
Core of the invention intention is: using the rubidium iron boron magneto being encapsulated in oil-immersed pump as the dynamic of oil-immersed pump
Power source by flame proof plus pours seal structure and not only increases the safety in utilization of magneto, while energy consumption is effectively reduced to make to run
The smaller positive technical effect of temperature rise in the process.
As Fig. 1 provide be this electric submersible pump overall structure diagram, this electric submersible pump, by shell and setting
Set in shell intracorporal driving motor composition, the shell by superposed outer housing 3, positioned at the volute 9 and pedestal of lower part
10 are constituted, and are a flange-interface 1 at the top of the outer housing, and the peripheral portion of outer housing is equipped with symmetrical charge of oil mouth A；It is described
Driving motor be a totally enclosed magneto 4, the described setting of magneto 4 is being connected respectively above and below by a connecting seat 13
In the same main cavity that the outer housing 3 and volute 9 connect is constituted, the main body of the magneto 4 is located at 13 upper case of attachment base
In body 3, and the oil plant output cavity B with the composition electric oil pump of outer housing 3；The output shaft of the magneto 4 then passes through attachment base
13 protrude into lower part volute it is intracavitary, and by be arranged in magneto output end 9 bottom of impeller 12 and volute pedestal
10) under shed D constitutes the oil plant suction chamber C of electric oil pump.
Preferably, the magneto 4 include: motor housing 27, upper end cover 17, lower cover 21, bearing 16, stator around
Group 25, rotor 26, permanent magnet 24；The stator winding 25, rotor 26 are encapsulated in by motor housing 27 and upper end cover
17, in the cavity that lower cover 21 is constituted, the rubidium iron boron permanent magnet 24 is arranged in regularly on the outer peripheral surface of rotor windings 25,
The stator winding 25 is encapsulated by the electric insulating sealant 23 of priming by vacuum；The both ends of the rotor 26 are equipped with outside framework oil seal
23, one end of the stator winding 25 is equipped with the extraction cable 15 drawn.
Preferably, the charge of oil mouth A being symmetrical set is equipped with closure plate 6.
Preferably, the periphery of the cable 15 is equipped with cable sheath tube 30, the cable sheath tube 30 and outgoing cable
Also encapsulated by the electric insulating sealant of priming by vacuum 23 between line 15, the other end of the cable pigtail 15 then with electrode terminal
31 connections, 30 upper end of cable sheath tube are fastened with extraction cable 15 by the nut 28 equipped with gasket 29.
The stator winding 25 of the magneto and the faying face of upper and lower end caps are equipped with explosion suppresion surface 19.
The upper end cover 17 of the magneto 4 is equipped with flow deflector 2.Pass through the adjustable liquid stream side of the setting of flow deflector 2
To, make the outlet that flow direction pump top after the adjusting of flow deflector 2, is laminar from the liquid that 12 edge of impeller is thrown away, thus
Improve the efficiency of pump.
What Fig. 1 was provided be the present invention as from oil tank tank car emptying when use state diagram.It is put into the oil-immersed pump
It when oil tank groove turner is made, is powered after starting, for the oil plant of oil tank groove car under the action of impeller 11, oil plant in tank car is from diving
Oil inlet D in the lower base 10 of oil pump volute bottom enters impeller placing chamber C, and the impeller driven by magneto 4
Effect, oil plant is continuously drawn into a steady stream, the petroleum pipeline being connect with flange 1 by oil plant output cavity B by 3 top of shell is defeated
Out.
What Fig. 4 was provided is another use state diagram of the invention.
Use state diagram when what Fig. 4 was provided is car loading operation, the magneto of oil-immersed pump does not work when the state,
Magneto at this time is only only used as a separating device in the channel of latent oil inner cavity, and the oil product in oil storage tank passes through Loading Pump
(pipeline oil pump), petroleum pipeline, oil-immersed pump upper flange enter the pump housing and enter tank car from charge of oil mouth A again, complete car loading operation.
The above is only the general embodiment of the invention that the applicant provides according to claim content, any current rows
The similar scheme for not having substantive innovation that the technical staff of industry makes referring to above technical scheme, belongs to protection of the present invention
Scope.
Claims (6)
1. a kind of electric submersible pump is made of shell and setting in the intracorporal driving motor of shell；The shell is by being located at top
Outer housing (3), the volute (9) positioned at lower part and pedestal (10) are constituted, be a flange-interface at the top of the outer housing (3)
(1), the peripheral portion of outer housing (3) is equipped with symmetrical unloading port (A)；The driving motor is a totally enclosed Permanent Magnet and Electric
Machine (4), the magneto (4) are arranged in the outer housing (3) and volute (9) structure being separately connected above and below by a connecting seat (13)
At same main cavity in, the main body of the magneto (4) is located in attachment base (13) upper outer shell (3), and and shell
The oil plant output cavity (B) of body (3) composition electric oil pump；The output shaft of the magneto (4) then passes through attachment base (13) and protrudes into
The volute of lower part is intracavitary, and passes through the pedestal (10) of impeller (12) and volute (9) bottom that magneto output end is arranged in
Under shed (D) constitute electric oil pump oil plant suction chamber (C).
2. a kind of electric submersible pump as described in claim 1, it is characterised in that: the magneto (4) includes: outside motor
Shell (27), upper end cover (17), lower cover (21), bearing (16), stator winding (25), rotor (26), permanent magnet (24)；Institute
State stator winding (25), rotor (26) is encapsulated in and is made of motor housing (27) and upper end cover (17), lower cover (21)
In cavity, the permanent magnet (24) is arranged in regularly on the outer peripheral surface of rotor windings (25), the stator winding (25) by
The electric insulating sealant (23) of priming by vacuum encapsulates；The both ends of the rotor (26) are equipped with outside framework oil seal (23), the stator
One end of winding (25) is equipped with the extraction cable (15) drawn.
3. a kind of electric submersible pump as described in claim 1, it is characterised in that: the charge of oil mouth (A) being symmetrical set
It is equipped with closure plate (6).
4. a kind of electric submersible pump as claimed in claim 2, it is characterised in that: the periphery of the extraction cable (15) is equipped with
Cable sheath tube (30), also by the electric insulating sealant of priming by vacuum between the cable sheath tube (30) and extraction cable (15)
(23) it encapsulates, the other end of the cable pigtail (15) is then connect with electrode terminal 31, on the cable sheath tube (30)
End is fastened by the nut (28) equipped with gasket (29) with extraction cable (15) and is positioned.
5. a kind of electric submersible pump as described in claim 1, it is characterised in that: the stator winding (25) of the magneto with
The faying face of upper and lower end caps is equipped with explosion suppresion surface (19).
6. a kind of electric submersible pump as described in claim 1, it is characterised in that: the upper end cover (17) of the magneto (4)
It is equipped with flow deflector (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001424.2A CN109611344A (en) | 2019-01-02 | 2019-01-02 | A kind of electric submersible pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910001424.2A CN109611344A (en) | 2019-01-02 | 2019-01-02 | A kind of electric submersible pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109611344A true CN109611344A (en) | 2019-04-12 |
Family
ID=66016025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910001424.2A Pending CN109611344A (en) | 2019-01-02 | 2019-01-02 | A kind of electric submersible pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109611344A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112093767A (en) * | 2020-09-14 | 2020-12-18 | 株洲少梧科技有限公司 | Filling method for reducing static electricity of oil product filling |
| CN113279971A (en) * | 2021-04-19 | 2021-08-20 | 南京乐水机电科技有限公司 | High-sealing anti-blocking submersible axial flow pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2165266Y (en) * | 1993-02-17 | 1994-05-18 | 沈登洪 | Magnetic driving chemical centrifugal pump |
| CN1403715A (en) * | 2002-09-29 | 2003-03-19 | 株洲市自强油气储运设备制造有限公司 | Multistage high-lift submerged oil pump |
| CN1490528A (en) * | 2002-10-18 | 2004-04-21 | 新昌德力石化设备有限公司 | Oil-submersible pump |
| CN101131158A (en) * | 2007-03-28 | 2008-02-27 | 林寿贵 | Natural gas liquid charging-up pump and natural gas liquid charging-up station |
| CN101873043A (en) * | 2010-07-14 | 2010-10-27 | 天津驰达电机有限公司 | Asynchronous starting and permanent magnet synchronous submersible pump motor |
| CN103629118A (en) * | 2013-12-10 | 2014-03-12 | 江苏大学 | Vertical pipeline permanent magnet canned motor pump |
| CN106762704A (en) * | 2017-01-12 | 2017-05-31 | 上海奥泵业制造有限公司 | A kind of portable dive diagonal pumps |
| CN209483628U (en) * | 2019-01-02 | 2019-10-11 | 株洲市自强油气储运设备制造有限公司 | A kind of electric submersible pump |
-
2019
- 2019-01-02 CN CN201910001424.2A patent/CN109611344A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2165266Y (en) * | 1993-02-17 | 1994-05-18 | 沈登洪 | Magnetic driving chemical centrifugal pump |
| CN1403715A (en) * | 2002-09-29 | 2003-03-19 | 株洲市自强油气储运设备制造有限公司 | Multistage high-lift submerged oil pump |
| CN1490528A (en) * | 2002-10-18 | 2004-04-21 | 新昌德力石化设备有限公司 | Oil-submersible pump |
| CN101131158A (en) * | 2007-03-28 | 2008-02-27 | 林寿贵 | Natural gas liquid charging-up pump and natural gas liquid charging-up station |
| CN101873043A (en) * | 2010-07-14 | 2010-10-27 | 天津驰达电机有限公司 | Asynchronous starting and permanent magnet synchronous submersible pump motor |
| CN103629118A (en) * | 2013-12-10 | 2014-03-12 | 江苏大学 | Vertical pipeline permanent magnet canned motor pump |
| CN106762704A (en) * | 2017-01-12 | 2017-05-31 | 上海奥泵业制造有限公司 | A kind of portable dive diagonal pumps |
| CN209483628U (en) * | 2019-01-02 | 2019-10-11 | 株洲市自强油气储运设备制造有限公司 | A kind of electric submersible pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112093767A (en) * | 2020-09-14 | 2020-12-18 | 株洲少梧科技有限公司 | Filling method for reducing static electricity of oil product filling |
| CN113279971A (en) * | 2021-04-19 | 2021-08-20 | 南京乐水机电科技有限公司 | High-sealing anti-blocking submersible axial flow pump |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190412 |