HK1163774B - Apparatus for transporting fuel - Google Patents
Apparatus for transporting fuel Download PDFInfo
- Publication number
- HK1163774B HK1163774B HK12104160.2A HK12104160A HK1163774B HK 1163774 B HK1163774 B HK 1163774B HK 12104160 A HK12104160 A HK 12104160A HK 1163774 B HK1163774 B HK 1163774B
- Authority
- HK
- Hong Kong
- Prior art keywords
- fuel
- cabinet
- tank
- delivery
- storage tank
- Prior art date
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Description
Technical Field
The present invention relates to a fuel delivery system for boilers of ships, generators, and the like (hereinafter referred to as "ships and the like"), and more particularly to a fuel delivery system for preventing fuel heated in a fuel precipitation tank (japanese: Cheng タンク) and/or a fuel day tank (japanese: サ - ビ ス タンク) from naturally flowing down or flowing back during a stop.
Background
In a ship or the like, when fuel is supplied to a mechanism engine, generally, the fuel is first sent from a fuel storage tank to a fuel sedimentation tank via a transfer pipe by a transfer pump, and then sent from the fuel sedimentation tank to a fuel day tank (fuel ordinary tank), and the fuel is supplied from the fuel day tank to the mechanism engine. At this time, heating is required to reduce the viscosity of the fuel in the fuel storage tank and to facilitate fuel delivery.
As a fuel delivery apparatus having such a heating device, there has been conventionally known an apparatus having no valve 15 of fig. 1, the apparatus including: a fuel storage cabinet 1; a fuel oil settling tank 3 which is communicated with the fuel oil storage tank 1 via a transfer line 2 and has a heating device not shown; a delivery pump 4 for delivering the fuel in the fuel storage tank 1 to the fuel sedimentation tank 3; the fuel oil daily cabinet 5 is communicated with the fuel oil sedimentation cabinet 3; a suction pipeline 6 which leads either one or both of the fuel oil sedimentation cabinet 3 and the fuel oil daily cabinet 5 to be communicated with the fuel oil storage cabinet 1; and a downflow pump 7 provided in the suction line 6 and adapted to pump the heated fuel in either or both of the fuel oil settling tank 3 and the fuel oil daily use tank 5 down to the fuel oil storage tank 1. In fig. 1, reference numeral 8 denotes a heater, 9 denotes a temperature sensor, and 10, 11, 12, and 13 denote valves.
In the apparatus of fig. 1 not having the valve 15, the fuel in the fuel sedimentation tank 3 is heated by a heating device, not shown, and then cleaned by a fuel cleaner, not shown, and then sent to the fuel day tank 5, and then distributed and supplied to a main engine, an auxiliary engine, a boiler, and the like, not shown. At the same time, a part of the heated fuel flows down the fuel storage tank 1 through the main suction pipe 1 in the fuel storage tank 1 by the down-flow pump 7, and heats the fuel in the tank 1.
In the device of fig. 1 not having the valve 15, when the fuel in the fuel storage tank 1 is heated after a part of the heated fuel is returned from the fuel sedimentation tank 3 or the fuel day tank 5 to the fuel storage tank 1, the amount and temperature of the returned fuel need to be changed in accordance with the length of the intake pipe 6 and the delivery pipe 2 or the temperature change of the sea water or the outside air.
That is, when the amount of heat of the returned heated fuel is larger than the appropriate value, the amount of heat radiation to the sea water and the outside air becomes large, and when the amount of heat of the returned heated fuel is smaller than the appropriate value, the required amount of fuel cannot be transported, so it is necessary to ensure that the amount and temperature of the returned heated fuel are appropriate.
However, in the device of fig. 1 not having the valve 15, when a part of the fuel heated in the fuel settling tank and/or the fuel day tank is caused to flow down to the fuel storage tank, the fuel does not return to the fuel storage tank but flows backward in the direction of the delivery pipe. Air bubbles are also generated when fuel from the fuel storage tank is delivered in the direction of the delivery pipe.
Further, a device of fig. 1 having the valve 15 only in the transfer pipe 2 is also known (japanese patent No. 3807597).
Even during the stop of the fuel delivery apparatus, the pressure on the inlet side (suction side) is basically high, and the pressure on the outlet side (discharge side) is basically low. This is because the fuel sump (suction side of the pump) is at a higher pressure than the fuel storage tank (output side of the pump). Thus, during the stoppage of the device, the oil will naturally flow involuntarily from the settling tank and/or the day tank to the storage tank under the effect of this pressure.
Patent document 1: japanese patent No. 3807597
Disclosure of Invention
Therefore, the problem to be solved by the present invention is to provide a fuel delivery device which prevents the heated fuel in the fuel settling tank and/or the fuel day tank from flowing down or flowing back naturally during the operation stop process and improves the disadvantages of the prior art.
In order to solve the above problem, a fuel delivery device according to the present invention includes: a fuel storage tank having a main suction line; a fuel oil settling tank which is communicated with the storage tank through a conveying pipeline; a delivery pump arranged in the delivery pipeline and used for delivering the fuel in the storage cabinet to the fuel sedimentation cabinet through the delivery pipeline; the fuel oil daily cabinet is communicated with the settling cabinet; a suction pipeline for communicating the storage cabinet with the fuel oil precipitation cabinet and/or the daily use cabinet; a downflow pump disposed in the intake duct and adapted to cause the heated fuel in the settling tank and/or the day tank to flow down toward the storage tank, to cause the heated fuel to flow down through a main intake duct to mix with the fuel in the storage tank and to heat the fuel in the storage tank, wherein a valve for holding a spring is provided downstream of the delivery pump in the delivery duct, and a valve for holding a spring is provided downstream of the downflow pump in the intake duct, and the spring is set to an arbitrary pressure, and the valve for holding the spring is adapted to prevent the heated fuel from flowing back toward the delivery duct by bringing a spool protector into contact with a valve seat by a biasing force of the spring and to prevent the heated fuel from flowing back toward the intake duct, thereby preventing the heated fuel from flowing back toward the delivery duct in the settling tank and/or the day tank, the heated fuel in the settling tank and/or the daily cabinet is prevented from flowing down to the suction pipeline, the fuel is prevented from flowing down naturally, and the fuel is delivered to the storage tank.
In the present invention, a valve for holding a spring is provided on the downstream side of the transfer pump in the transfer line, and a valve for holding a spring is provided on the downstream side of the downflow pump in the intake line, so that the heated fuel is prevented from flowing back to the transfer line and the heated fuel is also prevented from flowing back to the intake line.
Drawings
Fig. 1 is a flow chart of the fuel delivery apparatus of the present invention.
Fig. 2 is a sectional view showing a closed state of a valve used in the fuel supply system according to an embodiment of the present invention.
Fig. 3 is a sectional view showing an opened state of a valve used in the fuel supply system according to an embodiment of the present invention.
Detailed Description
In fig. 1, the fuel delivery apparatus of the present invention includes: a fuel storage tank 1 having a main suction pipe 14; a fuel oil settling tank 3 communicating with the fuel oil storage tank 1 via a transfer pipe 2; a delivery pump 4 provided in the delivery pipe 2 for delivering the fuel in the fuel storage tank 1 to the fuel precipitation tank 3 through the delivery pipe 2; the fuel oil daily cabinet 5 is communicated with the fuel oil sedimentation cabinet 3; a suction pipeline 6 which enables the fuel oil storage cabinet 1 to be communicated with the fuel oil sedimentation cabinet 3 and/or the fuel oil daily cabinet 5; and a downflow pump 7 disposed in the suction line 6 and flowing the heated fuel in the fuel oil settling tank 3 and/or the fuel oil day tank 5 down to the fuel oil storage tank 1. The heated fuel is caused to flow down through main suction line 14 to mix with the fuel in fuel storage 1 and heat the fuel in fuel storage 1. In fig. 1, reference numeral 8 denotes a heater, 9 denotes a temperature sensor, and 10, 11, 12, and 13 denote valves.
The main improvement of the apparatus of the present invention is that a valve 15 for holding a spring 16 is provided on the downstream side of the feed pump 4 in the feed pipe 2, and a valve 15 for holding a spring 16 is provided on the downstream side of the suction pipe 6 in the flow-down pump 7. The apparatus of the present invention is characterized in that the fuel heated in the fuel oil settling tank 3 and/or the fuel oil daily use tank 5 is prevented from flowing backward in the direction of the delivery pipe 2, and the fuel heated in the fuel oil settling tank 3 and/or the fuel oil daily use tank 5 is prevented from flowing backward in the intake pipe 6, and is prevented from flowing down naturally, and flows down to the storage tank 1.
Fig. 2 is a sectional view showing a closed state of the valve 15, fig. 3 is a sectional view showing an open state of the valve 15, and as shown in fig. 2, during the operation stop, the stem 18 is closed in advance and the spool protector 21 is brought into contact with the valve seat 22. In this state, the fuel from the inlet 19 does not advance toward the outlet 20.
In operation, as shown in fig. 3, the valve stem 18 is opened in advance to pull up the valve stem 23. In this state, normally, the spool protector 21 is pressed against the valve seat 22 via the gasket 17 by the pressing force of the spring 16. Therefore, the spool protector 21 abuts on the valve seat 22, and the fuel from the inlet 19 is blocked by the spool protector 21 from communicating with the outlet 20. Therefore, the heated fuel is prevented from flowing backward in the direction of the delivery pipe 2, and the heated fuel is prevented from flowing down naturally in the direction of the intake pipe 6. At the same time, the air bubbles generated from the fuel storage tank 1 through the main suction pipe 14 are also destroyed and disappear.
The spring 16 may be set to any pressure, for example, about 0.098MPa.1.0Kgf/cm2(fully open). Thereby, the heated fuel from the fuel storage 1 flows from the inlet 19 toward the outlet 20 while lifting the spool protector 21. At this time, bubbles generated by the air also disappear by the pressure.
The fuel delivery device of the present invention is provided with the valve 15 for holding the spring 16 on the downstream side of the delivery pump 4 of the delivery pipe 2 and the valve 15 for holding the spring 16 on the downstream side of the downflow pump 7 of the intake pipe 6, so that the fuel heated in the settling tank 3 and/or the day tank 5 flows down to the storage tank without flowing back in the direction of the delivery pipe 2 and without flowing down naturally to the intake pipe 6, and the air bubbles in the delivery pipe 2 are automatically destroyed and eliminated, and the fuel delivery device has high industrial applicability.
Description of the reference numerals
1 fuel storage tank, 2 delivery pipes, 3 fuel settling tank, 4 delivery pumps, 5 fuel day tank, 6 suction pipes, 7 down flow pumps, 14 suction main pipe, 15 valves, 16 springs, 17 gaskets, 18 valve handles, 19 inlets, 20 outlets, 21 valve post sheaths, 22 valve seats and 23 valve stems.
Claims (1)
1. A fuel delivery device for a ship, comprising: a fuel storage tank having a main suction line; a fuel oil settling tank which is communicated with the storage tank through a conveying pipeline; a delivery pump arranged in the delivery pipeline and used for delivering the fuel in the storage cabinet to the fuel sedimentation cabinet through the delivery pipeline; the fuel oil daily cabinet is communicated with the settling cabinet; a suction pipeline for communicating the storage cabinet with the sedimentation cabinet and/or the daily cabinet; a downflow pump disposed in the suction line to cause the heated fuel in the settling tank and/or the daily use tank to flow down to the storage tank; a valve for holding a spring, provided on the downstream side of the transfer pump of the transfer pipe; and a valve for holding a spring provided on the downstream side of the downflow pump in the suction pipe,
the heated fuel is made to flow down through a main suction pipe to mix with the fuel in the storage tank and heat the fuel in the storage tank,
the valve holding the spring is provided on both the delivery pipe and the suction pipe, so that the spool protector is brought into contact with the valve seat by the urging force of the spring, thereby preventing the heated fuel from flowing back to the delivery pipe, preventing the heated fuel from flowing down to the suction pipe while stopping, and preventing the heated fuel from flowing down naturally, and bubbles generated from the fuel storage cabinet from being destroyed and disappearing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-155466 | 2010-07-08 | ||
| JP2010155466A JP5530276B2 (en) | 2010-07-08 | 2010-07-08 | Fuel oil transfer device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| HK1163774A1 HK1163774A1 (en) | 2012-09-14 |
| HK1163774B true HK1163774B (en) | 2015-10-09 |
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