JP3348655B2 - Fuel supply system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a boiler and the like.
Those about the fuel supply system settings.

[0002]

The oil service tank which is installed to supply fuel to the Related Art boiler, is provided with a detector for detecting the remaining amount of the fuel reduces the fuel so that to grasp the degree of . Then, based on the reduced degree of the fuel, refueling to the oil service tank from a main tank.

[0003] The fuel decrease in the oil service tank, but in order to consume the fuel in the boiler, it really a thing by consumption, or not discriminated whether something's due to leakage. If long it due to leak, it means that the fuel is leaking to the outside from the oil service tank or a fuel pipe,
Not only is the fuel wasted, but there is a risk of igniting the leaked fuel and causing a fire.

[0004] In addition, as described above, according to the reduced degree of fuel in the oil service tank, the fuel based on Tan
Although the the auxiliary sheet is to the oil service tank from click, the <br/> when such capacity reduction of the fuel pump provided jam or to the pipe of the piping to the oil service tank occurs, the fuel is not properly complement feed. In this state, when continued operation of the boiler, the oil fuel in the service static tank is consumed, eventually resulting in the boiler is stopped.

[0005]

The invention of this [0006] tries to solve
The problem to be is Oite the fuel supply system, fuel leakage or pipe clogging, the abnormality of the fuel pump and the control valve is detected early, suppresses small leakage amount of the fuel, the risk of accidents due to the fuel leak avoiding sex, also it is to avoid the shutdown of the fuel used equipment supply of fuel due to the interrupted from the fuel supply system.

[0006]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 has a fuel tank for supplying fuel to a fuel- using device;
A main tank for replenishing the fuel through a supply pipe to the fuel tank, and a supplying-side control valve provided on the supply side pipe, the fuel
A liquid level detector for detecting a change in the liquid level in the fuel tank;
The supply side control valve based on the liquid level detected by the liquid level detector
Controls the opening and closing of, when the supply side control valve liquid level in the fuel tank despite the closed chain <br/> state rises to leak and determine the constant of the supplying-side control valve And a fuel supply controller.

[0007] According to a second aspect of the invention, a fuel tank for supplying fuel through the <br/> supply pipe to the fuel used equipment, a supply-side control valve provided on the supply pipe, the fuel tank Inside
A liquid level detector for detecting a change in the liquid level of the liquid, and the liquid level detector
Of fuel to the fuel tank based on the liquid level detected in
Controls the supply, the supply-side control valve comes with <br/> the liquid level in the fuel tank despite the closed state is reduced, and a fuel supply controller for fuel leakage and determine the constant It is characterized by that.

The invention according to claim 3 is directed to a fuel- using device .
A fuel tank for supplying fuel, and a main tank refueling via a supply pipe to the fuel tank, a fuel pump provided in the supply pipe, variations in liquid level in the fuel tank
Liquid level detector to detect gasification, and detected by the liquid level detector
When the start / stop of the fuel pump is controlled based on the liquid level,
Both after a predetermined time has elapsed from the start of the fuel pump, the liquid level does not change bite other in the fuel tank and drops
It can, and characterized in that a fuel supply control device for plugging and determine the constant of the supply pipe.

The invention according to claim 4 is directed to a fuel- using device .
A fuel tank for supplying fuel, and a main tank refueling via a supply pipe to the fuel tank, a fuel pump provided in the supply pipe, variations in liquid level in the fuel tank
Liquid level detector to detect gasification, and detected by the liquid level detector
When the start / stop of the fuel pump is controlled based on the liquid level,
Both can and after the predetermined time has passed from the activation of the fuel pump, the liquid level in the fuel tank does not reach a predetermined liquid level, the
It is characterized in that a fuel supply controller for capacity reduction and determine the constant of the fuel pump.

[0010] Further, the invention according to claim 5 is characterized by using fuel.
Tank for supplying fuel to equipment for use, and the fuel tank
A source tank for refueling via a supply side pipe to the
A supply side control valve provided in the supply side pipe,
A liquid level detector for detecting a change in the liquid level of the liquid, and the liquid level detector
Control the opening and closing of the supply side control valve based on the liquid level detected in
At the specified time after opening the supply side control valve.
After a lapse of time, the liquid level in the fuel tank does not change or
When the fuel pressure drops, it is determined that the supply side piping is clogged.
And a feed control unit.

[0011]

Next, an embodiment of the present invention will be described.
explain about. The fuel supply system of the invention, Boi
For fuel supply systems for fuel-using equipment such as
You .

[0012] The fuel supply system of the invention includes a fuel tank <br/> click, via a supply pipe to the fuel tank
Fuel usage device is connected. In addition , the fuel tank
The, be connected to one main tank through a supplying-side pipe, before
Depending on the consumption of fuel by supplying to the serial fuels used equipment, fuel from the source tank are configured to be replenished. The fuel supply system includes a fuel supply controller, the fuel supply controller, by detecting a change in liquid level in the fuel tank by the liquid level detector mounted to the fuel tank, the original Refuel from tank
And, liquid level a predetermined position 置Ma other in the fuel tank is maintained within a predetermined range.

[0013] Here, supply of fuel from said main tank to said fuel tank, said or supplied by only drop by utilizing the difference in height between the source tank and the fuel tank, or
The fuel is pumped by providing a fuel pump in the supply side pipe. Thus, wherein the supply pipe, the according to the installation conditions of the original tank or the fuel tank, the supplying-side control valve Contact
One is provided even spare the fuel pump sac Chi no less. Then, the control fuel <br/> auxiliary supply system of the main tank to the fuel tank, in the case of by drop is done by opening and closing of the supplying-side control valve, in the case of those performed by pumping of the fuel pump opening and closing the front of said supplying-side control valve
This is performed by starting and stopping the fuel pump. Further, the main tank is lower place than the fuel tank (e.g., underground) in some cases, the only attachment the fuel pump to the supply pipe, in some cases carried out by starting and stopping of the fuel pump.

Further, there is a case provided with a supply-side control valve to the supply pipe, such as when stopping the fuel used equipment, fuel
In order to prevent leakage of fuel , the flow of fuel from the fuel tank to the fuel- using equipment is shut off.

[0015] The supplying-side control valve, the fuel pump and
The supply side control valve is connected to the fuel supply controller. Then, the fuel supply controller, said supplying-side control valve, by controlling the fuel pump and the supply-side control valve, as before reporting, liquid level a predetermined position 置Ma other in the fuel tank In addition to maintaining the predetermined range, these abnormalities are detected in the following procedure.

[0016] First, when detecting an abnormality in the supply-side control valve is in the closed state of the supply-side control valve, said fuel
Detecting a change in the liquid level in the charge tank. When the liquid level of the fuel <br/> tank rises, the problem has occurred with the supplying-side control valve, to determine the constant a leak has occurred. In this case, the case supply of fuel to the fuel tank is by only the height difference as in the previous SL. Moreover, said which was provided on the supply side pipe and the supplying-side control valve and said fuel pump, and close the supply-side control valve, detecting a change in the liquid level in the fuel tank by starting the fuel pump I do. When the liquid level in the fuel tank rises, before
Serial there is an abnormality in the supply-side control valve, when determine the constant <br/> leakage has occurred. Further, even if provided with the fuel pump and the supplying-side control valve, the liquid level of the fuel in the original tank, when in a position higher than the auxiliary <br/> supply side control valve and the fuel tank fuel without starting the fuel pump tends to flow toward the fuel <br/> tank. Therefore, in this case, to close the supply-side control valve, in a state of stopping the fuel pump, by detecting a change in liquid level in the fuel tank, similarly to the supplying-side control valve abnormality it is possible to detect.

Further, the despite the supply-side control valve is in the closed state, the case where the fuel liquid level in the tank drops, the supply-side control valve was abnormal or is the supply-side piping and before
To fuel leakage and determine constant in serial fuel tank.

Further, the fuel supply controller detects clogging in the supply pipe. That is, in the configuration refueling from the main tank by the fuel port <br/> pump, after a predetermined time has elapsed after starting the fuel pump
Liquid level does not change bite other in the fuel tank was reduced
Time, clogging and determine the constant of the supply pipe. Further, the <br/> the case of the configuration refueling using only difference in height of the original tank and the fuel tank, the liquid level in the fuel tank to the supply-side control valve from the opened after a predetermined time has elapsed There is bitten other unchanged when lowered, to <br/> determination Priority determination and clogging of the supply side pipe. That is, it is detected that the supply of fuel to the fuel tank from the main tank is not performed, the replenishment
To determine the clogging of the side pipe. Here, when the former liquid level does not change, the supply is not Na state of the fuel to the fuel used equipment (i.e., the fuel used device state at the time of non-operation)
, And the case where the latter liquid level is lowered, the state where there is a supply of fuel to the fuel used equipment (i.e., the fuel used device state at the time of operation) is.

Furthermore, the fuel supply controller, to determine a constant the capacity of the fuel pump in the supply pipe. Here, the capacity of the fuel pump indicates a discharge amount per unit time . As before reporting, the fuel pump, the fuel data <br/> For example the liquid level Otaku in tank are controlled to maintain the predetermined range, the liquid level is lower level inside the fuel tank Then, the fuel pump is started, and when the liquid level reaches the upper limit, the fuel pump is stopped. Therefore, the liquid level of said fuel tank even fuel pump after starting the predetermined time elapses can not reach a predetermined liquid level, the ability decreases and determine the constant <br/> of the fuel pump. In other words, it decreased ability of the fuel pump due to aging, the discharge amount is decreased, the required time is to become longer according to raise the liquid level in the fuel tank to the upper liquid level from the lower limit liquid level .

[0020] Before SL predetermined time is set longer than the time it takes to Ru was increased from the lower limit liquid level to the upper liquid level of the liquid level in the fuel tank by the normal-time of the fuel pump. You
Ie, when you start the fuel pump during operation of the fuel used equipment, the fuel pump even if normal, the
The time required to raise the liquid level in the fuel tank from the lower limit liquid level to the upper limit liquid level is longer than when the fuel- using device is not operating. Therefore, the prior SL predetermined time set longer than the fuel <br/> use according place needed time to Ru was increased to the upper limit liquid level from the lower limit liquid level of the liquid level in the fuel tank during operation of the equipment You.

[0021] Thus, fuel leakage from the fuel tank or the supply pipe, the leakage due to failure of the control valves, capacity reduction of the fuel pump, clogging of the supply side pipe has occurred When it is determined that a warning has been issued, an alert is issued and that effect is immediately notified to the person in charge of management.

As described above , according to the above configuration , it is possible to detect the occurrence of fuel leakage at an early stage, to reduce the amount of fuel leakage, and to prevent accidents caused by fuel leakage. Danger can be avoided. Therefore, the risk of fire occurrence can be avoided.

Furthermore, according to the configuration, the like fuel Pont <br/> capacity reduction or clogging of the supply side pipe flop it can be detected by supply failure of fuel to the fuel tank, the fuel It is possible to prevent the used equipment from becoming unusable.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 is an explanatory diagram showing an actual施例which the present invention is applied to a fuel supply system of the boiler.

[0025] In FIG. 1, the fuel supply system 1 includes a fuel tank 2 to supply the fuel to the boiler 4 as the fuel used device through a supply side pipe 3 from the fuel tank 2. Further, the fuel tank 2, in response to said consumption of fuel by the boiler 4, the fuel from the main tank 6 of a large capacity via a supply pipe 5 is Ru is replenished. Have you to this embodiment
Te is being configured to supply fuel to the one boiler 4, the boiler 4 may be not limited to one, and plural.

A liquid level detector 7 is provided in the fuel tank 2.
Only by Ah it is, in this embodiment, is provided with a liquid level detector 7 for detecting a continuous liquid level. The liquid level detector 7 includes:
For example, it is a pressure sensor which continuously detects the liquid level of the fuel in the fuel tank 2 as pressure. Further, as the liquid level detector 7, one that measures the weight of the fuel tank 2 with a load cell or the like and detects a change in the weight of the fuel can also be used. Further , as the liquid level detector 7, for example, a float type sensor that detects a liquid level in two stages of an upper limit liquid level H and a lower limit liquid level L can be used.

The supply pipe 3 is provided with a supply control valve 8, and the supply pipe 5 is provided with a supply control valve 9 and a fuel pump 10 in order from the source tank 6 side. . In the example of this, two of the supplying-side control valve 9
Are connected in series to ensure that fuel can be shut off.
Tei Ru.

[0028] Here, the fuel supply system 1, the are those composed of a main tank 6 to the supply-side control valve 8, before Symbol fuel tank 2 and the supply side control valve 8
Is installed together with the boiler 4 in a boiler room (not shown).

In the fuel supply system 1, the liquid level detector 7, the supply side control valve 8, and the supply side control valve 9
The fuel pump 10 is connected to a fuel supply controller 11. The fuel supply controller 11 controls replenishment of fuel from the source tank 6 to the fuel tank 2 and maintains the fuel level in the fuel tank 2 within a predetermined range. That reduces the fuel in the fuel tank 2, the liquid level is below limit
When reduced by the liquid level L or, together with activating the fuel pump 10, opens the supply-side control valve 9 starts to supply the fuel. Further, when the liquid level rises until the upper limit liquid level H, it stops the the fuel pump 10, closing the supply-side control valve 9, to stop the supply of fuel. Therefore,
The fuel tank 2, that have have a function as a so-called service tank.

Further, the fuel supply controller 11 performs the abnormality detection in the fuel supply system 1. The procedure for detecting an abnormality in the fuel supply controller 11 will be described below.

Firstly, the fuel supply controller 11, the start of the fuel pump 10 in a state of closing the auxiliary <br/> supply side control valve 9, in the fuel tank 2 by the liquid level detector 7 Detect the liquid level. According to the signal from the liquid level detector 7,
Wherein if it is detected that the fuel tank liquid level in 2 rises, abnormality in the supply-side control valve 9 occurs, to determine the constant when the leakage occurs. Further, with the supply side control valve 9 closed and the fuel pump 10 stopped, the fuel tank 2
When the liquid level of the inner rises to leak and <br/> determination Priority determination of the supplying-side control valve 9. Furthermore, even though the supply-side control valve 8 is closed, when said fuel tank liquid level in 2 drops, was the and the supply-side control valve 8 the supply-side pipe 3 or <br/> the fuel leak and determine the constant in the fuel tank 2.

Further, as described above, the fuel supply controller 11 has detected the liquid level in the fuel tank 2 by the liquid level detector 7, the liquid level in the fuel tank 2 is below < if the br /> limit liquid level L, and activates the fuel pump 10 DOO
First, the supply side control valve 9 is opened . Then, the fuel tank liquid level in 2 bite other unchanged after starting the fuel pump 10 after a predetermined time has elapsed when lowered, to clogging and determine the constant of the <br/> supplying-side pipe 5. That is, the from the fuel pump 10 by detecting that is not made the supply of fuel to the fuel tank 2, determine clogging of the supplying-side pipe 5
Set . Here, when the former liquid level does not change, the <br/> supply is not name status of the fuel to the boiler 4 (i.e., the boiler 4 is not operating at the time of the state), and the latter liquid level Drop
In this case, the fuel is supplied to the boiler 4 (that is, the boiler 4 is in operation).

Furthermore, when even after the lapse of a predetermined time after starting the fuel pump 10 liquid level in the fuel tank 2 does not reach the upper limit liquid level H, the discharge per capacity (unit time of the fuel pump 10 to decrease and determine a constant amount). In other words, decreased ability of the fuel pump 10 due to aging, the discharge amount is decreased, the required time it takes to raise the fuel tank liquid level in the 2 from the lower limit liquid level L to the upper liquid level H is long It is because it becomes.

[0034] Before SL predetermined time is set longer than the take place essential time to Ru was increased from the lower limit liquid level L to the upper liquid level H of the liquid level in the fuel tank 2 by the fuel pump 10 in a normal state . That is, when you start the fuel pump 10 during operation of the boiler 4, Ru said also the fuel pump 10 is normal to increase the liquid level in the fuel tank 2 from the lower limit liquid level L to the upper liquid level H Kaname Tokoro time is longer than when the boiler 4 is <br/> in inactive. Therefore, the prior SL predetermined time, raising the liquid level in the fuel tank 2 during operation of the boiler 4 from the lower limit liquid level L to the upper liquid level H Nonika
To set longer than mow the required time.

The above manner, the fuel leakage from the fuel tank 2 or the supply-side pipe 3, leakage due to failure of the supply-side control valve 8 and the supplying-side control valve 9, capacity reduction of the fuel pump 10, when clogging of the supply side pipe 5 is determined to have occurred, it notifies the immediately manage personnel to that effect by an alarm.

As described above, according to the above configuration, the occurrence of fuel leakage can be detected at an early stage, the amount of fuel leakage can be minimized, and accidents due to fuel leakage , such as leakage It is possible to avoid the danger of a fire occurring due to the ignition of the fuel . Further, the including capacity reduction and the clogging of the supplying-side pipe 5 of the fuel pump 10 can be detected early, and the supply failure of the fuel to the fuel tank 2, in advance that the boiler 4 can not be used Can be prevented.

[0037]

Effects of the Invention According to the present invention, it is possible to detect the occurrence of fuel leakage in early, it is possible to suppress decrease the leakage amount of the fuel, avoiding the risk of fire caused by fuel leakage I can .

[0038] Further, according to the present invention, the clogging of the capacity reduction and the supplying-side piping of the fuel pump can be detected early, the supply failure of the fuel to the fuel tank, fuel used <br/> It is possible to prevent the device from becoming unusable beforehand.

[Brief description of the drawings]

FIG. 1 shows a case where the present invention is applied to a boiler fuel supply system.
And is an explanatory diagram showing an actual施例.

[Explanation of symbols]

2 Fuel tank 3 supply pipe 4 boiler (fuel used equipment) 5 supplying-side pipe 6-way tank 7 liquid level detector 8 supply-side control valve 9 supplying-side control valve 10 the fuel pump 11 fuel supply controller

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI G01M 3/26 G01M 3/26 S (72) Inventor Isao Higuchi ^7- Horiecho, Matsuyama-shi, Ehime Prefecture Miura Kogyo Co., Ltd. (72 ) Inventor Koichi Noguchi 7-7, Horie-cho, Matsuyama-shi, Ehime Miura Kogyo Co., Ltd. (56) References JP-A-7-174593 (JP, A) JP-A 8-184523 (JP, A) JP 58-8904 (JP, A) JP-A-62-293125 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01F 1/00-25/00

Claims (5)

(57) [Claims] [Claim 1] A fuel motor <br/> tank 2 for supplying the fuel to the fuel used equipment 4, fuel through the supply side pipe 5 to the fuel tank 2
A supply tank 6 for replenishing the fuel , a replenishment control valve 9 provided in the replenishment side pipe 5, and a change in the liquid level in the fuel tank 2.
The liquid level detector 7 to be detected and the liquid level detected by the liquid level detector 7
When the opening and closing of the supply side control valve 9 is controlled based on the liquid level
Both the supplying-side control valve 9 is written in a closed-chain state
When Warazu liquid level of the fuel tank 2 rises, the fuel supply system characterized by comprising a fuel supply controller 11 to leak and determine the constant of the supplying-side control valve 9. 2. The fuel- using equipment 4 is connected to the fuel- using equipment 4 via a supply-side pipe 3.
A fuel tank 2 for supplying the fuel, the supply-side control valve 8 provided in the supply-side pipe 3, varying the liquid level in the fuel tank 2
Level detector 7 for detecting gasification and detection by the liquid level detector 7
Refueling of the fuel tank 2 based on the liquid level
Controls, the despite the supply-side control valve 8 is closed liquid level in the fuel tank 2 comes with <br/> was lowered, and the fuel supply controller 11 to fuel leakage and determine the constant A fuel supply system comprising: And wherein the fuel data <br/> tank 2 for supplying the fuel to the fuel used equipment 4, fuel through the supply side pipe 5 to the fuel tank 2
Provided in the original tank 6 for replenishing the feed and the replenishment side pipe 5
The change in the liquid level in the fuel tank 10 with the fuel pump 10
The liquid level detector 7 to be detected and the liquid level detected by the liquid level detector 7
The start / stop of the fuel pump 10 is controlled based on the liquid level.
Rutotomoni, after a predetermined time from the activation of the fuel pump 10, can the liquid level in the fuel tank 2 is bitten other unchanged decreased to clogging and determine the constant of the supplying-side pipe 5 retardant
The fuel supply system is characterized in that a charge supply controller 11. And wherein the fuel data <br/> tank 2 for supplying the fuel to the fuel used equipment 4, fuel through the supply side pipe 5 to the fuel tank 2
Provided in the original tank 6 for replenishing the feed and the replenishment side pipe 5
The change in the liquid level in the fuel tank 10 with the fuel pump 10
The liquid level detector 7 to be detected and the liquid level detected by the liquid level detector 7
The start / stop of the fuel pump 10 is controlled based on the liquid level .
Rutotomoni, after starting a predetermined time lapse of the fuel pump 10, the fuel tank liquid level in 2 comes with <br/> not reach a predetermined liquid level, fuel subjected to diminished ability and determine the constant of the fuel pump 10 A fuel supply system, comprising: a supply controller (11). 5. A fuel tank for supplying fuel to a fuel-using device 4.
To the fuel tank 2 via a supply side pipe 5.
Provided in the original tank 6 for replenishing the feed and the replenishment side pipe 5
The change of the liquid level in the fuel tank 2 with the supply side control valve 9
The liquid level detector 7 to be detected and the liquid level detected by the liquid level detector 7
When the opening and closing of the supply side control valve 9 is controlled based on the liquid level
In both cases, a predetermined time has elapsed since the supply side control valve 9 was opened.
Later, the liquid level in the fuel tank 2 does not change or is low.
When the fuel is dropped, it is determined that the supply side pipe 5 is clogged.
A fuel supply system comprising a supply controller (11) .