CN108204319B - Fuel oil transfer device - Google Patents
Fuel oil transfer device Download PDFInfo
- Publication number
- CN108204319B CN108204319B CN201710223996.6A CN201710223996A CN108204319B CN 108204319 B CN108204319 B CN 108204319B CN 201710223996 A CN201710223996 A CN 201710223996A CN 108204319 B CN108204319 B CN 108204319B
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- China
- Prior art keywords
- fuel oil
- storage tank
- transfer device
- tank
- oil storage
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B11/00—Interior subdivision of hulls
- B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
Abstract
The invention provides a fuel oil transfer device, which is provided with a small compartment capable of easily and newly setting heated fuel oil to stop so as to improve the mixing property of the fuel oil. When a main suction pipe (2C) and a small compartment (20) are provided in a fuel oil storage tank (2), the small compartment (20) uses aggregate (2A) prepared as an existing structure for separating spaces, the aggregate (2A) is provided with through holes (2A1) at positions where the central phases are different and the outlines do not intersect with each other, the main suction pipe (2C) has a bell mouth (2B) opening toward the bottom, and the small compartment (20) partially forms a space separated from other spaces in the fuel oil storage tank (2) and capable of covering the main suction pipe (2C).
Description
Technical Field
The present invention relates to a fuel oil transfer device, and more particularly, to a fuel oil storage tank for storing fuel oil supplied to an internal combustion engine or the like.
Background
Fuel oil for boilers of ships, generators, and the like is supplied from a fuel oil storage tank to an internal combustion engine. For example, inexpensive C heavy oil is used as the fuel oil stored in the fuel oil storage tank.
The viscosity of the fuel oil changes relatively greatly due to the temperature difference. Therefore, it is required to maintain a low viscosity temperature. In order to satisfy this requirement, a structure is known in which fuel oil in a fuel oil storage tank is heated (for example, patent document 1).
Fig. 3 is a piping diagram for explaining the fuel oil transfer device 100 using a configuration for heating fuel oil.
The fuel oil transfer device 100 includes, for example: the ship is provided with a plurality of fuel oil storage tanks 101 near the bottom of the ship, a fuel oil settling tank 103 for heating the fuel oil sucked from the fuel oil storage tank 101 by using a transfer pump 102, and a fuel oil day tank 104 for purifying and temporarily storing the heated fuel oil.
A downflow pump 105 for returning the heated fuel oil to the fuel oil storage tank 101 is provided in an oil passage between the fuel oil day tank 104 and the fuel oil storage tank 101. In fig. 3, reference numeral 106 denotes a heater, reference numerals 107, 108 denote valves, and reference numeral 109 denotes a temperature sensor.
The fuel oil heated in the fuel oil precipitation tank 103 is transferred to the fuel oil day tank 104 after being purified, and a part thereof is returned from the fuel oil precipitation tank 103 and/or the fuel oil day tank 104 to the fuel oil storage tank 101 little by little via the downflow pump 105.
The fuel oil is supplied from the fuel oil day tank 104 temporarily stored to a fuel injection device of a main engine such as an internal combustion engine used for a ship, a generator, or the like, or other auxiliary machines.
The heated fuel oil returned to the fuel oil storage tank 101 is returned in an amount corresponding to the amount of fuel oil supplied to the main engine or the auxiliary engine, mixed with a part of the fuel oil in the tank, and heated to 30 to 40 ℃.
As shown in fig. 4, the fuel oil storage tank 101 includes a box-shaped cell 112 for heating a part of the stored fuel. The box-shaped cells 112 are provided for the purpose of preventing a decrease in transfer efficiency caused when the temperature distribution of the stored fuel oil varies in the vertical direction.
That is, since the heated fuel oil has a lower specific gravity than the fuel oil that has not been heated, it tends to rise, and a high-viscosity fuel oil having a relatively low temperature and a relatively high specific gravity tends to accumulate below the fuel oil storage tank. As a result, the viscosity of the fuel oil is high when the fuel oil is taken out from the lower side, and therefore the transfer efficiency is deteriorated.
The box-like cells 112 can suppress the rise of the heated fuel oil and reduce the variation in the temperature distribution in the vertical direction in the fuel oil storage tank. As a result, when the fuel oil is taken out from the bottom portion side of the tank, the fuel oil can be taken out with less temperature drop and without impairing the transfer efficiency by suppressing the increase in viscosity.
The function of the box-shaped small compartment 112 provided in the fuel oil storage tank 101 shown in fig. 3 will be explained.
In fig. 4, a box-shaped cell 112 of a fuel oil storage tank 101 includes a main suction pipe 111 communicating with a bell 110, and the bell 110 is opened to the vicinity of the bottom.
The suction main pipe 111 is covered by a box-shaped small compartment 112. The box-shaped cell 112 has a cut-out portion 112A formed by cutting out one of the sides partitioning the space upward from the bottom surface side, and the inside of the fuel oil storage tank 101 communicates with the inside of the box-shaped cell using the cut-out portion 112A.
The box-shaped small compartment 112 prevents the heated fuel oil returned from the bell 110 into the fuel oil storage tank 101 from rising from the position of the bell 110 and flowing to a position away from the bell. That is, when the fuel oil flowing out of the bell 110 rises, it collides with the ceiling of the box-shaped cell 112 and bounces. As a result, the fuel oil is disturbed in the box-like cells 112 and stops inside the box-like cells 112.
The box-shaped cell 112 is provided with an air discharge hole 112B1 in the ceiling for discharging air accumulated therein and allowing fuel oil to flow therein.
On the other hand, as a structure for collecting the heated fuel oil flow around the bell mouth 110, a structure in which a partition plate 113 having a T-shaped cross section is disposed near the notch portion 112A has been proposed (for example, patent document 1).
The heated fuel oil collides with the horizontal piece 113A of the partition 113 in addition to the ceiling of the box-shaped cell 112 to form a turbulent flow, thereby improving the mixing property with the fuel oil in the box-shaped cell 112. As a result, the mixing ratio of the fuel oil sucked through the bell mouth 110 and the heated fuel oil is increased, and the heating efficiency of the fuel oil is improved.
The provision of the box-like cells 112 as described above has the following effect: the mixing ratio of the fuel oil can be increased by stopping the heated fuel oil in the small space, and the viscosity increase of the fuel oil can be suppressed.
Here, when a new cell is to be provided in a structure such as a ship, it is necessary to create the cell while preventing interference with a frame, a beam, a partition plate, and the like, which are existing structural parts. Further, even if interference with the conventional structure is avoided, a material for new installation needs to be prepared, and it is difficult for new installation or addition of a small compartment to be easily performed.
Patent document 1: japanese patent No. 3807596
Disclosure of Invention
Problems to be solved by the invention
The invention provides a fuel oil transfer device, which is provided with a structure that a small chamber capable of stopping heated fuel oil and improving mixing property of the fuel oil can be easily and newly arranged.
Means for solving the problems
In order to solve the problem, the present invention is characterized in that, when the suction main pipe and the small compartment are provided in the fuel oil storage tank, the small compartment uses bone materials prepared as an existing structure for partitioning a space, and the bone materials are provided with through holes at positions where the center phases are different and the outlines do not intersect with each other. The main suction pipe has a bell mouth opening toward the bottom, and the small compartment is partially formed in the fuel oil storage tank in a space which is separated from other spaces and can cover the main suction pipe.
Effects of the invention
According to the present invention, when a small compartment is newly provided, an aggregate used as an existing structure for partitioning a space can be used, and therefore, it is not necessary to newly prepare a material for providing the small compartment. Therefore, the cubicle can be easily newly or additionally installed.
Drawings
Fig. 1 is a schematic diagram showing a configuration of a fuel oil transfer device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram for explaining the structure of a fuel oil storage tank of the fuel oil transfer device shown in fig. 1.
Fig. 3 is a schematic diagram showing a structure of a conventional fuel oil transfer device.
Fig. 4 is a perspective view for explaining a structure used in the fuel oil storage tank shown in fig. 3.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described.
Fig. 1 is a diagram showing a structure of a fuel oil transfer device 1 according to an embodiment.
The fuel oil transfer device 1 includes a fuel oil precipitation tank 3 and a fuel oil day tank 4 which are communicated with a fuel oil storage tank 2.
The fuel oil precipitation tank 3 is a tank for heating fuel oil, and heats the fuel oil to a temperature of 70 to 80 ℃ by a heater, not shown, as an example.
The fuel oil storage tank 2 and the fuel oil precipitation tank 3 are communicated through a transfer pipe 5, and a transfer pump 6, a temperature sensor 7, and a pressure sensor 8 are disposed midway therebetween.
The temperature sensor 7 is used to control the opening and closing of a heater provided in the fuel oil precipitation tank 3 or to set the temperature of the heater based on the result of measuring the temperature of the fuel oil inlet side of the transfer pump 6.
The pressure sensor 8 is provided for monitoring a change in pressure of the fuel oil sucked into the transfer pump 6. The pressure change is used to determine a change in flow resistance corresponding to a change in viscosity of the fuel oil. In particular, when the viscosity becomes high and the flow resistance increases, the pressure on the inlet side of the transfer pump 6 tends to be vacuum. Therefore, when a pressure change of the vacuum tendency is detected, heating for reducing the viscosity of the fuel oil is required.
The fuel oil precipitation tank 3 is provided with a liquid level sensor 9 for detecting the liquid level of the fuel oil sucked by the transfer pump 6.
The liquid level sensor 9 is a sensor capable of detecting the liquid level when a predetermined amount of fuel oil is introduced into the fuel oil precipitation tank 3. The liquid level sensor 9 is used to stop the driving of the transfer pump 6 when it is detected that a predetermined amount of fuel oil has been introduced into the fuel oil precipitation tank 3.
The fuel oil day tank 4 is a tank for temporarily storing and supplying the heated fuel oil to an internal combustion engine or the like after purifying the fuel oil. The fuel oil storage tank 2 and the fuel oil day tank 4 are communicated through an intake pipe 10, and a downflow pump 11 is disposed midway therebetween. A part of the fuel oil stored in the fuel oil day tank 4 is flowed down to the fuel oil storage tank 2 by the downflow pump 11 to raise the temperature of the fuel oil in the fuel oil storage tank 2.
The reason why the down pump 11 is referred to in this case is that the fuel oil day tank 4 is assumed to be disposed at a higher position than the fuel oil storage tank 2. That is, the expression that the fuel oil is repeatedly caused to flow down from the upper fuel oil day tank 4 to the lower fuel oil storage tank 2 and is used to flow down is meant.
In the configuration shown in fig. 1, a fuel oil precipitation tank 3 and a fuel oil day tank 4 are respectively connected to an intake pipe 10. Therefore, by providing the valve 12 in the flow path of the fuel oil outlet of each tank 3, 4, the flow path of the fuel oil from either or both of the tanks 3, 4 to the fuel oil storage tank 2 can be set.
The above fuel oil transfer device 1 is used for heating the fuel oil sucked from the fuel oil storage tank 2 into the fuel oil precipitation tank 3 by the transfer pump 6, purifying the heated fuel oil, introducing the heated fuel oil into the fuel oil day tank 4, and supplying the stored fuel oil to the internal combustion engine or the like.
Part of the fuel oil temporarily stored in the fuel oil precipitation tank 3 and/or the fuel oil day tank 4 is returned to the fuel oil storage tank 2 by the downflow pump 11. As a result, the fuel oil in the fuel oil storage tank 2 is partially heated to 36 to 40 ℃ by being mixed with the heated fuel oil.
In the present embodiment, as the operation time between the pumps, for example, the transfer pump 6 is about 15 minutes and the downflow pump 11 is about 45 minutes, and the operation is selectively alternated. In this time, the operation time of the transfer pump 6 can be made to correspond to, for example, the time until the liquid level of the fuel oil is detected by the liquid level sensor 9 in the fuel oil precipitation tank 3. That is, if the level sensor 9 detects the level of the fuel oil during the operation time when the fuel oil is caused to flow at a flow rate based on the rated values such as the rotational speed and the drive current of the transfer pump 6, it can be determined that the viscosity of the fuel oil is not a flow resistance of the fuel oil, and if the operation time is exceeded, it can be determined that the viscosity of the fuel oil is high and the fluidity is poor. Further, when the liquid level sensor 9 detects that the amount of fuel introduced into the fuel oil precipitation tank 3 reaches a predetermined amount, the operation of the transfer pump 6 is stopped to prevent the fuel oil from overflowing.
When no fuel oil is consumed, such as in parking, the operation time of the transfer pump 6 is short, and the time until the liquid level sensor 9 is activated is, for example, about 6 minutes.
Paths through which the fuel oil is sucked from the fuel oil storage tank 2 to the fuel oil precipitation tank 3 by the transfer pump 6 are denoted by reference numerals F1 to F5 in fig. 1. The path through which the fuel oil flows down from the fuel oil day tank 4 to the fuel oil storage tank 2 by the flow-down pump 11 is indicated by arrows F10 to F12 in fig. 1.
The configuration of the main part of the fuel oil transfer device 1 using such a configuration is disclosed in japanese patent laid-open No. 2012-17123, which was an application filed by the present applicant.
The fuel oil transfer device 1 of the present embodiment having the above-described configuration is characterized by a configuration of a fuel oil storage tank.
That is, in the fuel oil transfer device 1 of the present embodiment, when a new installation or a person adds a cell 20 (see fig. 2) having the same function as the box-shaped cell shown in fig. 4, the reinforcing aggregate 2A (see fig. 2) constituting the existing structure is used without preparing a new material.
Fig. 2 is a schematic diagram for explaining the features of the fuel oil transfer device 1 according to the present embodiment.
As shown in the drawing, the fuel oil storage tank 2 is formed by a space located below the bottom of the ship or the deck of the ship in the interior of the hull, not shown in detail.
As shown in fig. 2, a reinforcing aggregate 2A composed of a plurality of partition plates is provided in the space. The space partitioned by the reinforcing aggregates 2A can be configured as a small compartment 20 into which heated fuel oil is introduced. Therefore, the volume of the small compartment can be determined by selecting the number of spaces partitioned by the reinforcing aggregate 2A.
A bell mouth 2B and a suction main pipe 2C are disposed in one of the spaces partitioned by the reinforcing aggregate 2A, the bell mouth 2B opens to the bottom of the space, and the suction main pipe 2C communicates with the bell mouth 2B and is connected to the transport pipe 5. The bell mouth 2B is used for introducing the heated fuel oil into one of the small compartments 20 and for sucking the fuel oil from the small compartment.
The reinforcing aggregates 2A are provided with through holes 2A1, and the through holes 21A are formed at positions where the contours do not intersect, with the center phases being different in the vertical direction or the horizontal direction. In fig. 2, reference character H denotes a difference in center phase between the through holes 2Al in the vertical direction. By making the center phases different, the fuel oil can be prevented from easily flowing out from the adjacent small compartments. In particular, the respective contours are formed at positions not intersecting each other, so that there is no communicating portion. This can prevent the heated fuel oil from separating from the vicinity of the bell mouth 2B, and can prevent the transfer efficiency from deteriorating due to the viscosity increase caused by the temperature decrease of the fuel oil sucked from the bell mouth 2B.
The through hole 2a1 is generally provided as a hole having a size through which an operator can pass.
A ladder 2a2 is provided at a position higher than the bottom of the fuel oil storage tank 2 in accordance with the center phase of each through hole 2 Al. Further, in fig. 2, reference numeral 2D denotes an air discharge hole.
The fuel oil transfer device 1 configured as described above can be used as it is as a reinforcing aggregate 2A that is an existing structure when a new structure or a small compartment for increasing the mixing ratio of heated fuel oil and fuel oil is added. Thus, when a new cell is newly installed or added, it is not necessary to prepare a new material.
Industrial applicability
The present invention can easily realize new installation or addition without preparing new materials or the like by using an existing structure when a box-shaped small compartment is newly installed or added. This prevents a temperature drop due to diffusion of the heated fuel oil in the fuel oil storage tank, and can reliably prevent deterioration of the transfer efficiency due to an increase in the viscosity of the fuel oil, and therefore, the fuel oil storage tank is highly practical.
Description of the reference numerals
1 fuel oil transfer device
2 fuel oil storage tank
2A reinforcing aggregate
2Al through hole
2B horn mouth
2C suction main pipe
20 small compartment
3 fuel oil precipitation tank
4 fuel oil daily-use tank
5 transport pipe
6 transfer pump
Distances of different phases of H center
Claims (3)
1. A fuel oil transfer device is provided with a fuel oil storage tank, a fuel oil precipitation tank for heating fuel oil sucked from the fuel oil storage tank, and a fuel oil daily tank for temporarily storing the heated fuel oil in order to return the heated fuel oil to the fuel oil storage tank, thereby enabling the fuel oil to circulate,
the fuel oil transfer device is characterized in that the fuel oil storage tank is provided with:
a suction main pipe having a bell mouth opening toward a bottom; and
a small compartment partially formed in the fuel oil storage tank so as to cover the suction main pipe at a distance from other spaces,
the small compartment uses bone materials prepared as an existing structure for partitioning a space, and the bone materials are provided with through holes at positions where the center phases are different and the outlines do not intersect with each other.
2. The fuel oil transfer device according to claim 1,
the through holes are different in center phase from each other in the vertical direction or the horizontal direction.
3. The fuel oil transfer device according to claim 1 or 2,
the volume of the cells is determined by selecting a number of more than two of the aggregates.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-244560 | 2016-12-16 | ||
| JP2016244560A JP6408546B2 (en) | 2016-12-16 | 2016-12-16 | Fuel oil transfer device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108204319A CN108204319A (en) | 2018-06-26 |
| CN108204319B true CN108204319B (en) | 2020-06-05 |
Family
ID=62603428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710223996.6A Active CN108204319B (en) | 2016-12-16 | 2017-04-07 | Fuel oil transfer device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6408546B2 (en) |
| KR (1) | KR102020474B1 (en) |
| CN (1) | CN108204319B (en) |
| TW (1) | TWI639548B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1669873A (en) * | 2004-03-17 | 2005-09-21 | 北辰产业株式会社 | Heating method for fuel oil in fuel oil storage tank |
| CN103299062A (en) * | 2011-01-12 | 2013-09-11 | 丰田自动车株式会社 | Fuel supply device |
| CN104562895A (en) * | 2013-10-10 | 2015-04-29 | 北辰产业株式会社 | Asphalt conveying method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4147269A (en) * | 1977-11-14 | 1979-04-03 | Werts David A | Fuel oil storage tank |
| JPS60107402U (en) * | 1983-12-22 | 1985-07-22 | 株式会社東芝 | hydraulic oil tank |
| JP3600269B2 (en) * | 1994-05-24 | 2004-12-15 | 天信 千々波 | Fuel oil transfer device |
| KR0171501B1 (en) * | 1996-08-28 | 1999-03-20 | 이성래 | Apparatus and process for reclaiming waste oil |
| TW361600U (en) * | 1998-10-30 | 1999-06-11 | Fueltec Energy Technology Corp | Improved kinetic circulation, heating, and storaging system for the emulsified fuel |
| TW437921U (en) * | 2000-06-09 | 2001-05-28 | Yan Guang Kuen | Improved fuel gasification device |
| JP3807596B2 (en) * | 2001-04-13 | 2006-08-09 | ホクシン産業株式会社 | Thermally efficient fuel oil storage tank |
| JP2003097502A (en) * | 2001-09-26 | 2003-04-03 | Koyo Seiko Co Ltd | Reservoir, power steering device and automobile |
| CN201678201U (en) * | 2010-04-16 | 2010-12-22 | 必成玻璃纤维(昆山)有限公司 | Low-sulphur fuel oil storage tank heating device |
| US8726886B2 (en) * | 2011-08-24 | 2014-05-20 | Robert Bosch Gmbh | Fuel supply system and anti-siphon jet pump |
| JP6016049B2 (en) * | 2011-09-26 | 2016-10-26 | いすゞ自動車株式会社 | Vehicle fuel supply device |
| JP5819375B2 (en) * | 2013-09-20 | 2015-11-24 | ホクシン産業株式会社 | Fuel oil heating method |
| CN205687879U (en) * | 2016-06-02 | 2016-11-16 | 龙岩卓越新能源股份有限公司 | A kind of emulsified fuel preparation facilities |
| JP6443639B2 (en) * | 2016-12-16 | 2018-12-26 | ホクシン産業株式会社 | Fuel oil transfer device |
| JP6447618B2 (en) * | 2016-12-16 | 2019-01-09 | ホクシン産業株式会社 | Fuel oil transfer device |
| JP6440329B2 (en) * | 2016-12-16 | 2018-12-19 | ホクシン産業株式会社 | Fuel oil transfer device |
-
2016
- 2016-12-16 JP JP2016244560A patent/JP6408546B2/en active Active
-
2017
- 2017-02-10 TW TW106104482A patent/TWI639548B/en active
- 2017-02-20 KR KR1020170022306A patent/KR102020474B1/en active IP Right Grant
- 2017-04-07 CN CN201710223996.6A patent/CN108204319B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1669873A (en) * | 2004-03-17 | 2005-09-21 | 北辰产业株式会社 | Heating method for fuel oil in fuel oil storage tank |
| CN103299062A (en) * | 2011-01-12 | 2013-09-11 | 丰田自动车株式会社 | Fuel supply device |
| CN104562895A (en) * | 2013-10-10 | 2015-04-29 | 北辰产业株式会社 | Asphalt conveying method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108204319A (en) | 2018-06-26 |
| JP6408546B2 (en) | 2018-10-17 |
| JP2018095311A (en) | 2018-06-21 |
| TWI639548B (en) | 2018-11-01 |
| TW201823141A (en) | 2018-07-01 |
| KR102020474B1 (en) | 2019-09-10 |
| KR20180070429A (en) | 2018-06-26 |
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