JP2006010144A - Liquid fuel supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid fuel supply device without causing a hindrance, when the whole combustors are operated in maximum consumption, even if pipes are thinned and relay tanks are miniaturized. <P>SOLUTION: This liquid fuel supply device supplies liquid fuel to a plurality of combustors 17 from a communicating tube 15, by communicating a second relay tank 14 by the communicating tube 15 with the relay tank 8 for supplying the liquid fuel in an oil tank 1 for storing the liquid fuel. Even if the size of the relay tank and the thickness of the communicating tube are reduced to about half as compared with a conventional liquid fuel supply device, cost can be reduced thereby without causing a shortage of fuel supply to the combustors, and construction can also be simplified more than the conventional liquid fuel supply device. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid fuel supply apparatus for supplying liquid fuel such as kerosene to each house in an apartment house.

Conventionally, in this type of liquid fuel supply apparatus, for example, an oil tank 101 is installed on the ground or underground, and after the liquid fuel in the oil tank 101 is pumped up to an oil storage tank 103 provided on the roof of a building by a pump 102. There is a liquid fuel supply system in which liquid fuel is supplied from an oil storage tank 103 to relay tanks 105 provided on each floor via an oil storage supply pipe 104 and liquid fuel is supplied from the relay tanks 105 on each floor to the combustors 106 on each floor. (For example, see Patent Document 1)
Japanese Patent Laid-Open No. 11-37457

  By the way, this liquid fuel supply apparatus is provided with a hot water heater, a heater, or the like as a combustor 106 in each section of each floor, and the volume of the relay tank 105 that supplies liquid fuel to it or from the relay tank 105 to each combustor 10. The pipe 107 has a thickness corresponding to the maximum amount of fuel consumed when all the combustors 106 on the floor perform maximum combustion operation.

  However, when there are many devices such as a water heater that have a large instantaneous fuel consumption, but are frequently operated intermittently without being continuously operated, the fuel consumption on that floor is the total combustor. Although it is rare that the maximum fuel consumption consumed when the maximum combustion operation of the engine 106 is performed, it is expensive to install and use the large relay tank 105 and the thick pipe 107 that can cope with the maximum fuel consumption. There was a problem that took too much.

  However, when the relay tank 105 and the pipe 107 corresponding to the fuel consumption smaller than the maximum fuel consumption are installed and used, for example, the combustor closest to the relay tank 105 on the same floor and the farthest combustor are simultaneously maximized. When the combustion operation is performed, if the pipe 107 is thin, the fuel of the maximum fuel consumption immediately flows into the nearest combustor 106, but the farthest combustor 106 has a large pipe load on the pipe path, so There was a problem that the maximum amount of fuel consumption did not flow.

  Also, instead of providing one large relay tank 105 at one end of the piping path, a plurality of small relay tanks 105 are provided in parallel at one end of the piping path, and even when a thinner pipe 107 is installed, the relay tank 105 is connected to the piping path. However, because the pipe 107 is thin, the pipe load on the pipe path is large. For example, the combustor 106 closest to the relay tank 105 on the same floor and the farthest combustor 106 simultaneously perform maximum combustion operation. When the pipe 107 is thin, the fuel of the maximum fuel consumption immediately flows into the nearest combustor, but the farthest combustor 106 has a large pipe load in the piping path, so the maximum fuel consumption is immediately There was a problem that the amount of fuel did not flow.

  This invention pays attention to this point and solves the above-mentioned problem. In particular, in claim 1, the configuration includes an oil tank that stores liquid fuel, and a relay tank that is supplied with the liquid fuel in the oil tank, In the liquid fuel supply apparatus for supplying liquid fuel from the relay tank to the combustor, the relay tank communicates with the second relay tank through a communication pipe, and liquid is supplied from the communication pipe to the plurality of combustors. It supplies fuel.

  Further, in the liquid fuel supply apparatus according to claim 2 of the present invention, in particular, in the structure, in claim 1, the relay tank and the second relay tank are installed at the same height at a position higher than the oil tank. In addition, an oil storage tank is provided at a position higher than the relay tank and the second relay tank, and liquid oil in the oil tank is supplied to the oil storage tank through a supply pipe by a supply pump, and The relay tank is supplied by a drop from an oil storage tank through an oil storage supply pipe.

  Further, in the liquid fuel supply apparatus according to claim 3 of the present invention, in particular, the configuration thereof is as set forth in claim 1, wherein the relay tank and the second relay tank are installed at the same height at a position higher than the oil tank. In addition, liquid fuel in the oil tank is supplied to the relay tank via a supply pipe by a supply pump.

  According to the first aspect of the present invention, the second relay tank is connected to the relay tank supplied with the liquid fuel in the oil tank for storing the liquid fuel through the communication pipe, and the communication pipe is connected to the plurality of combustors. Liquid fuel is supplied, so that the conventional relay tank has a shortage of fuel supply to the combustor even if the size of the relay tank and the communication pipe are about half that of one liquid fuel supply device. It does not occur, so the installation space of the relay tank can be reduced, and the relay tank mounting structure may be one that can withstand about half the load of a conventional relay tank compared to one liquid fuel supply device, In addition, by using a thin pipe, the cost of the pipe itself can be reduced, and the construction of the pipe can be made easier than the conventional thick pipe.

According to the liquid fuel supply apparatus of claim 2, the relay tank and the second relay tank according to claim 1 are installed at the same height at a position higher than the oil tank. In addition, an oil storage tank is provided at a position higher than the relay tank and the second relay tank, and liquid fuel in the oil tank is supplied to the oil storage tank via a supply pipe by the supply pump, Is supplied from the oil storage tank by a drop through the oil storage supply pipe, so that even if the supply pump is broken, liquid fuel can be supplied to the relay tank until the liquid fuel in the oil storage tank is exhausted. It is possible to slow down oil leakage of the relay tank 2.

  According to a third aspect of the present invention, in the liquid fuel supply apparatus according to the first aspect, the relay tank and the second relay tank are installed at the same height at a position higher than the oil tank. In addition, liquid fuel in the oil tank is supplied to the relay tank via a supply pipe by a supply pump, so that it is not necessary to provide an oil storage tank, and the cost can be reduced accordingly. Thus, in the case of a high-rise building, even if an abnormality occurs in a relay tank on one floor, liquid fuel can be supplied to the relay tank on another floor via a supply pipe by a supply pump.

Next, a liquid fuel supply apparatus according to the present invention will be described with reference to an embodiment shown in the drawings.
As shown in FIG. 1, 1 is an oil tank installed underground or on the ground, 2 is an oil storage tank installed on the roof of a building, 3 is an oil tank 2 on the roof of the building, and 3 is a supply pipe 4 that supplies liquid fuel in the oil tank 1 to the roof. A supply pump 5 is supplied by pressure to the supply pipe 5 is an on-off valve for opening and closing the supply pipe 4, and 6 is a return pipe having one end provided on the oil storage tank 2 and the other end connected to the oil tank 1. When the liquid level detection device 7 provided in 2 detects that the liquid fuel in the tank has become lower than a predetermined liquid level, the on-off valve 5 is opened and the supply pump 3 is operated so that the oil tank 1 When liquid fuel is supplied to the oil storage tank 2 and the liquid level detection device 7 detects that the liquid fuel in the tank has reached a predetermined liquid level, the on-off valve 5 is closed and the supply pump 3 is stopped. Is.

  Further, when the liquid fuel in the oil storage tank 2 becomes higher than a predetermined liquid level due to a failure of the liquid level detection device 7 provided in the oil storage tank 2, one end is provided at the upper part of the oil storage tank 2, and the other end However, since the liquid fuel in the oil storage tank 2 is returned to the oil tank 1 by the return pipe 7 connected to the oil tank 1, the liquid fuel is prevented from overflowing from the oil storage tank 2.

  8 is a first relay tank provided above each floor, branched from an oil storage supply pipe 9 having one end connected to the bottom of the oil storage tank 2 and the other end connected to the vicinity of the oil tank 1 connection portion of the return pipe 6. When the liquid fuel is supplied from the branch pipe 10 and the liquid level detecting means 11 provided in the first relay tank 8 detects that the liquid fuel in the tank has become lower than a predetermined liquid level, the oil is stored first. The oil storage supply pipe opening / closing valve 12 provided at the place connected to the bottom of the oil storage tank 2 of the supply pipe 9 is opened, and then the branch pipe opening / closing valve 13 provided in the branch pipe 10 is opened so that the oil storage tank 2 and the relay tank are opened. When the liquid fuel is supplied from the oil storage tank 2 to the first relay tank 8 due to a drop with respect to 8 and the liquid level detection means 11 detects that the liquid fuel in the tank has reached a predetermined liquid level, the oil storage supply pipe The on-off valve 12 is closed and the branch pipe on-off valve 13 is closed. It is intended.

  Reference numeral 14 denotes a second relay tank provided above each floor. One end of the second relay tank is connected to the bottom of the first relay tank 8 and the other end of the second relay tank is connected to the bottom of the second relay tank 14 via a communication pipe 15. Liquid fuel is supplied from the first relay tank 8, a tank of the same size as the first relay tank 8 is provided at the same height, and the flow rate of each room is integrated in the communication pipe 15. A combustor 17 in each room is connected through a flow meter 16.

  Reference numeral 18 denotes a relay tank return pipe, one end of which is connected to the bottom of the second relay tank 14 and the other end of which is connected to the return pipe 6. The bottom of the first relay tank 8 and the relay tank return pipe 18 Are connected via a first relay tank return opening / closing valve 19, one end is provided at the upper part of the first relay tank 8, and the other end is connected to the first relay tank by a relay tank return pipe 18. A first relay tank return pipe 20 connected to the return pipe 6 side, that is, the downstream side is provided from where the return return valve 19 is connected.

  Reference numeral 21 denotes a second relay tank return opening / closing valve 19 which is provided in the vicinity of the connection portion of the relay tank return pipe 18 with the bottom of the second relay tank 14, and one end is provided above the second relay tank 14. The relay tank return pipe 18 is provided with a second relay tank return pipe 22 connected to the return pipe 6 side, that is, downstream of the second relay tank return opening / closing valve 21 at the other end. .

Next, the operation of this liquid fuel supply device will be described.
First, when the combustor 17 such as a water heater starts operation, liquid fuel is supplied from the communication pipe 15 to the combustor 17 via the flow meter 16.
As a result, when the liquid level detection means 11 detects that the liquid fuel in the first relay tank 8 has decreased and the liquid level in the tank has been lowered and has become lower than the predetermined liquid level, the oil storage supply pipe is opened and closed. The valve 12 is opened, and then the branch pipe opening / closing valve 13 provided in the branch pipe 10 is opened, so that liquid fuel is supplied from the oil storage tank 2 to the first relay tank 8 due to a drop between the oil storage tank 2 and the relay tank 8. When the liquid level detecting means 11 detects that the liquid fuel in the tank has reached a predetermined liquid level, the oil storage supply pipe opening / closing valve 12 is closed and the branch pipe opening / closing valve 13 is closed, and this operation is repeated. Is.

  Further, since the first relay tank 8 and the second relay tank 14 are provided with the same size tank at the same height, and the two tanks are always in communication with each other via the communication pipe 15, the two tanks. When the liquid level detecting means 11 detects that the liquid fuel in the first relay tank 8 has reached the predetermined liquid level, the second relay tank is operated. The liquid fuel in 14 also reaches a predetermined liquid level.

  Next, the operation when the amount of liquid fuel consumption increases significantly will be described. When all the combustors 17 start operating at the maximum combustion amount from the state where all the combustors 17 on the floor are stopped, the liquid fuel with the maximum consumption amount is supplied from the communication pipe 15 to the combustor 17 through the flow meter 16. Supplied.

  At this time, the combustor 17 closest to the first relay tank 8 is supplied with the maximum amount of liquid fuel from the first relay tank 8 via the communication pipe 15 and is closest to the second relay tank 14. The combustor 17 is supplied with the maximum amount of liquid fuel from the second relay tank 14 via the communication pipe 15, and the combustor 17 connected near the middle of the communication pipe 15 has the first relay tank 8. And the second relay tank 14 are supplied with the maximum amount of liquid fuel via the communication pipe 15.

  As a result, the conventional relay tank does not cause shortage of fuel supply to the combustor 17 even if the size of the relay tank and the thickness of the communication pipe 15 are reduced by about half compared to a single liquid fuel supply device. The installation space of the relay tank can be reduced, and the installation structure of the relay tank may be able to withstand about half the load of a conventional relay tank compared to one liquid fuel supply device, and thin piping is used. Thus, the cost of the piping itself can be reduced, and the construction of the piping can be made easier than the conventional thick piping.

  As described above, in a liquid fuel supply apparatus such as a water heater that has a large instantaneous maximum consumption amount of liquid fuel, but is connected to many devices that do not operate continuously as the combustor 17, all the combustors 17 have a maximum consumption amount. The size of the relay tank and the thickness of the piping of the communication pipe 15 were determined so as not to cause any trouble when driving. However, an excessive capacity is set in terms of the normal consumption, and the relay tank And the cost of the pipe itself, and the construction cost, etc., but the relay tank has two relay tanks, so that all the combustors 17 are operated at the maximum consumption without causing any trouble. In addition, the cost of the piping itself can be reduced, and the construction itself is simpler than before, so that the construction cost can be reduced.

  In this embodiment, the oil storage tank 2 is installed on the roof of the building. However, the present invention is not limited to this. For example, the oil tank 1 is not installed on the roof of the building as shown in FIG. Alternatively, the liquid fuel may be directly pumped and supplied to the first relay tank 8 on each floor by the supply pump 3.

In this case, when the combustor 17 such as a water heater starts operation, liquid fuel is supplied from the communication pipe 15 to the combustor 17 via the flow meter 16.
As a result, when the liquid level detection means 11 detects that the liquid fuel in the first relay tank 8 has decreased and the liquid level in the tank has been lowered and has become lower than the predetermined liquid level, the branch pipe on-off valve 13 is opened, and then the supply pump 3 operates to supply liquid fuel from the oil tank 1 to the first relay tank 8, and the liquid level detection means 11 causes the liquid fuel in the relay tank 8 to reach a predetermined liquid level. When it is detected that it has reached, the supply pump 3 is stopped and the branch pipe opening / closing valve 13 is closed.

  Also in the embodiment of FIG. 2, the first relay tank 8 and the second relay tank 14 are the same size, and the first relay tank 8 and the second relay tank 14 are provided at the same height. Since the two tanks are always in communication with each other via the communication pipe 15, the liquid levels in the two tanks always act the same, and the liquid fuel in the first relay tank 8 is kept at a predetermined level. When the liquid level detecting means 11 detects that the liquid level has been reached, the liquid fuel in the second relay tank 14 has also reached the predetermined liquid level, and the effect thereof is also the same as that of the embodiment of FIG. The same.

The whole figure at the time of providing the liquid fuel supply apparatus of this invention in a building. The whole figure of the other Example. The whole figure at the time of providing the conventional liquid fuel supply apparatus in a building.

Explanation of symbols

1 Oil tank 8 Relay tank 14 Second relay tank 15 Communication pipe 17 Combustor

Claims (3)

  In a liquid fuel supply apparatus that includes an oil tank that stores liquid fuel and a relay tank that is supplied with the liquid fuel in the oil tank, and that supplies liquid fuel from the relay tank to a combustor, the relay tank includes: A liquid fuel supply device that communicates with the second relay tank through a communication pipe and supplies liquid fuel to the plurality of combustors from the communication pipe.   The relay tank and the second relay tank are installed at the same height at a position higher than the oil tank, and an oil storage tank is provided at a position higher than the relay tank and the second relay tank. 2. The liquid fuel in the oil tank is supplied by a supply pump through a supply pipe, and the relay tank is supplied by a drop from an oil storage tank through an oil storage supply pipe. Liquid fuel supply device.   The relay tank and the second relay tank are installed at the same height at a position higher than the oil tank, and liquid fuel in the oil tank is supplied to the relay tank through a supply pipe by a supply pump. The liquid fuel supply apparatus according to claim 1, wherein:

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