JP2000301984A - Oil feeding automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil feeding automobile in which protection of an accumulator is easily achieved by preventing sudden discharge from the accumulator, thereby preventing the accumulator from vibrating, causing foreign noises or being damaged. SOLUTION: This oil feeding automobile forcibly feeds fuel oil into an aircraft A by means of an oil feed hose 4 with an oil feed nozzle 3, after passing the fuel oil through an oil feed pipe line 2 fitted with oil feeding equipment 1. The oil feeding automobile includes an accumulator 14 branching from the oil feeding line 2 via a branch pipe line 15 for absorbing surge pressures generated in the oil feeding line 2, and a throttle-and-check valve 22 intervening in a portion of the branch pipe line 16 and having a throttle valve 23 and a check valve 24 arranged in parallel. For discharge of the fuel oil absorbed and accumulated by the accumulator 14, the throttle-and-check valve 22 sets a constant discharge time to prevent sudden discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a refueling vehicle. That is, the present invention relates to a refueling vehicle that refuels an aircraft at an airport.

[0002]

2. Description of the Related Art FIG. 2 is a view for explaining a conventional example of this kind, and is an explanatory view of an oil supply pipe, an oil supply device and the like. As shown in FIG. 1, in the refueling vehicle, the fuel oil passes through a refueling pipe 2 in which refueling equipment 1 is disposed, and then is supplied to the aircraft A by a refueling hose 4 having a refueling nozzle 3 at a tip. To feed and refuel. In other words, in the servicer, a typical example of a refueling car,
Fuel oil taken in from the hydrant valve C of the hydrant refueling device B via the intake hose 5 is supplied to a swivel joint 6, a valve 7, a line strainer 8, a pressure regulating valve 9 with an on / off function, and a filter separator 1.
0, a flow meter 11, a valve 7, a venturi 12, etc., after passing through an oil supply pipe 2 in which the oil supply pipes 1 are sequentially arranged, and then a swivel joint 6, a relay hose 13, a swivel joint 6, a valve 7, a swivel joint 6, and an oil supply hose. 4 and the like, from the refueling nozzle 3 at the tip to the refueling port on the aircraft A,
The tank was being pumped and refueled.

In a refueling vehicle such as a servicer, an accumulator 14 for absorbing a surge pressure generated in the refueling pipe 2 is branched from the refueling pipe 2 via a branch pipe 15 with a valve 7. I was In other words, when refueling the aircraft A, the refueling is interrupted, stopped, and stopped by turning off (closing) the pressure regulating valve 9 and the on-off valve on the side of the aircraft A.
When the process is completed, the pressure of the fuel oil in the fuel supply pipe 2 is rapidly increased because the fuel oil has been sent under pressure. Therefore, the accumulator 14 has conventionally been used in order to absorb the surge pressure generated in the oil supply pipe 2 and the like and temporarily accumulate the fuel oil accompanying the surge pressure and discharge it afterwards. In the illustrated conventional example, such an accumulator 14 is branched and connected to the oil supply pipe 2 on the upstream side and the downstream side of the pressure regulating valve 9 having an on / off function.

[0004]

The following problems have been pointed out in such a conventional example. As described above, when the refueling is interrupted, stopped, or terminated, the accumulator 14 absorbs the surge pressure generated in the refueling pipe 2 and, after the fact, pressurizes the absorbed and accumulated fuel oil in the refueling pipe 2. Discharge to At the time of such a discharge, the pressure of the fuel oil discharged from the accumulator 14 is much higher than the pressure of the fuel oil in the oil supply pipe 2, so that the discharge is suddenly performed instantaneously. Therefore, due to such rapid discharge of fuel oil, the accumulator 1
Regarding No. 4, a problem that vibration, abnormal noise, damage, breakage, and the like occur was pointed out. In the case of the piston type accumulator 14, it has been pointed out that, for example, such a problem occurs because the piston and the cylinder portion collide.

The present invention has been made in view of such circumstances, and has been made in order to solve the above-mentioned problems of the conventional example, and has a structure in which a predetermined throttle check valve is provided in the middle of a branch pipe to an accumulator. First, by adopting,
It is another object of the present invention to propose a refueling vehicle which prevents sudden discharge from the accumulator, thereby protecting the accumulator, and secondly, realizing this easily and easily.

[0006]

The technical means of the present invention for solving such a problem is as follows. First, claim 1 is as follows. That is, this claim 1
After refueling a vehicle, the fuel oil passes through a refueling pipe in which refueling equipment is arranged, and then is fed to the aircraft by refueling with a refueling hose having a refueling nozzle at a tip. And an accumulator branched from the refueling pipe via a branch pipe to absorb a surge pressure generated in the refueling pipe, and a throttle check valve interposed in the middle of the branch pipe, It is characterized by. Next, claim 2 is as follows. That is, the refueling vehicle of the second aspect is the first aspect of the invention.
In the refueling vehicle described in the above, the throttle check valve is interposed so as to function from the accumulator side to the refueling pipe side, and is provided with a pressurized state stored in the accumulator as the surge pressure is absorbed. When discharging the fuel oil to the refueling pipe side, the discharge is throttled to set a constant discharge time to prevent a sudden discharge, and the discharge time is set to be shorter than the generation cycle of the secondary wave of the surge pressure and thereafter. So as to be shorter,
The aperture is set.

[0007] The refueling vehicle according to the present invention has the following configuration. When the refueling is interrupted, stopped, or terminated, the pressure of the fuel oil rapidly rises in the refueling pipe, and the surge pressure generated as described above is temporarily absorbed by the accumulator. Then, after the fact, the fuel oil in the pressurized state thus absorbed and accumulated is discharged from the accumulator to the oil supply pipe. At this time, a predetermined throttle check valve is interposed in the middle to restrict the flow of the fuel oil to be discharged, so that the discharge is gradually performed over a certain discharge time, and a rapid discharge is avoided. . The surge pressure generates a secondary wave, a tertiary wave, and the like while gradually attenuating. Therefore, the throttle degree of the throttle check valve is set so that the discharge time is shorter than the generation cycle of the surge pressure. Have been. Thus, the discharge from the accumulator is performed without any trouble in absorbing the surge pressure by the accumulator.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments of the invention shown in the drawings. FIG. 1 is a diagram for explaining an embodiment of the present invention and is an explanatory diagram of an oil supply pipe, an oil supply device, and the like. FIG. 3 is an explanatory front view showing a refueling state by a servicer as a refueling vehicle.

First, a refueling vehicle will be generally described with reference to FIG. In the refueling vehicle, after passing the fuel oil through the refueling pipe 2 in which the refueling equipment 1 is arranged, the fuel oil is supplied to the aircraft A from the lifter 16 which can be moved up and down by the refueling hose 4 having the refueling nozzle 3 at the tip. Pressure feeding and refueling are performed through the refueling port H. As shown in the figure, such a fuel refueling vehicle includes a servicer of a type in which fuel oil pumped through an underground hydrant pipe D is taken in and refueled. There is a type in which oil is supplied by a vehicle-mounted pump.

The illustrated servicer type refueling vehicle will be described in further detail. A hydrant refueling device B is provided near the airport, and the fuel oil pumped from a storage tank by a pump (not shown) passes through a hydrant pipe D under the airport, and then flows into an underground pit near a parking area. It reaches the hydrant valve C at the filler port. Then, the tip of the intake hose 5 serving as the receiving hose mounted on the servicer is connected to the hydrant valve C via the hydrant coupler E.
The fuel oil, which has been connected and connected to the oil supply pipe, is fed through the hydrant pipe D through the intake hose 5 to the oil supply pipe 2 (see FIG. 1) of the machine room 17 of the servicer.
Incorporated. In the oil supply pipe 2 of the machine room 17, various oil supply devices 1 (see FIG. 1) are provided in order from the upstream side to the downstream side. Then, the taken-in fuel oil is filtered and purified by passing through the oil supply pipe 2 and the oil supply equipment 1 of the machine room 17, and is adjusted to predetermined oil supply pressure, flow rate and flow rate. Controlled.

Then, the fuel oil is fed and supplied to the aircraft A through the fuel hose 4 as a deck hose and the fuel nozzle 3 at the tip thereof. That is, servicer machine room 1
7, a lifter 16 serving as a work table for refueling is provided on a chassis frame 18 at the rear, for example, so that the lifter 16 can be moved up and down by a lift mechanism 19.
Is installed. The lifter 16 carries the worker F at the time of refueling, and is lifted to just below the fuel port H on the lower surface of the wing G of the aircraft A parked at the airport parking lot. And the worker F
Refueling nozzle 3 at the tip of refueling hose 4 as deck hose
Is connected to and connected to a refueling port H provided on the lower surface of the wing G of the aircraft A to perform a refueling operation. The fuel tank on the aircraft A side is disposed in the wing G and is usually divided into a plurality of tank chambers. Each of the tank chambers of such a fuel tank is provided with a fuel supply port via an on-off valve and a collective pipe. Connected to H. Reference numeral 20 denotes a cab of the servicer, and reference numeral 21 denotes wheels of the servicer. Servicer-type refueling vehicles generally do this.

Next, referring to FIG. 1, the oil supply pipe 2, the oil supply equipment 1 and the like will be described. The upstream side of the oil supply pipe 2 is connected to the intake hose 5 via the swivel joint 6,
The downstream side is connected to a refueling hose 4 as a deck hose via a swivel joint 6, a relay hose 13, a swivel joint 6, a valve 7, a swivel joint 6, and the like. Then, in the refueling pipe 2, from the upstream side to the downstream side,
Valve 7, line strainer 8, pressure regulating valve 9, filter separator 10, flow meter 11, valve 7, venturi 12
Are provided in order. The line strainer 8 filters the fuel oil taken in, the filter separator 10 cleans the fuel oil, and the venturi 12
Corrects the fuel oil pressure. The valves 7 can each be manually operated. The pressure regulating valve 9 functions to regulate the pressure of the fuel oil for refueling and, in the illustrated example, to turn on / off (open / close) the flow of the fuel oil through the refueling pipe 2.
The on / off (opening / closing) of the refueling pipe 2 and the start, interruption, stop, and end of refueling are not limited to the illustrated example, and a deadman valve provided on the refueling pipe 2 and other on / off functions. It may be performed by a valve or the like. The refueling pipe 2 and the refueling equipment 1 are generally configured as described above.

The fuel supply pipe 2 is provided with an accumulator 14 as the fuel supply equipment 1. The accumulator 14 is branched from the oil supply pipe 2 via a branch pipe 15 and absorbs surge pressure generated in the oil supply pipe 2. That is, as is well known, the accumulator 14 is used for absorbing, accumulating, and releasing surge pressure energy in a fluid pipeline, and is a cylinder type in which nitrogen gas or the like is sealed in one cylinder chamber via a piston, A bladder type in which an inflatable / contractible rubber bag in which gas or the like is sealed is placed in a container is known.

When the refueling vehicle such as a servicer refuels the aircraft A, the accumulator 14
Refueling by turning off (closed) a valve with an on / off function such as the pressure adjusting valve 9 or turning off (closed) an on-off valve (not shown) on the aircraft A side to which the refueling nozzle 3 is connected. When the operation is interrupted, stopped, or terminated, it functions to absorb the surge pressure generated in the oil supply pipe 2. That is, the oil supply pipe 2
When the fuel oil being pumped through the inside is suddenly shut off, the fuel oil accompanying the surge pressure is temporarily stored in a pressurized state in order to absorb the suddenly rising pressure in the oil supply pipe 2. Thereafter, for example, by turning on (opening) the pressure regulating valve 9 or the like or turning on (opening) the on-off valve on the aircraft A side, when refueling is restarted, the accumulator 14 is turned on.
Discharges the pressurized fuel oil that has been absorbed and accumulated into the oil supply pipe 2 at a lower pressure.

In the illustrated example, the accumulators 14 are respectively disposed one immediately downstream of the pressure regulating valve 9 and one upstream of the pressure regulating valve 9 with the filter separator 10 interposed therebetween. Various usage forms are also conceivable. For example, the pressure regulating valve 9 may be disposed on only one of the upstream side and the downstream side, or may be provided on two sides instead of one by one.
It is also conceivable to arrange them three by three, or to arrange them differently on the upstream side and the downstream side of the pressure regulating valve 9. In any case, the accumulator 14 is connected to an end of each branch pipe 15 branched from the oil supply pipe 2. The accumulator 14 is configured as described above.

A throttle check valve 22 is interposed in the branch pipe 15 to the accumulator 14. The throttle check valve 22 is interposed so as to function from the accumulator 14 side to the oil supply pipe 2 side. And the throttle check valve 22
When discharging the pressurized fuel oil accumulated in the accumulator 14 due to the absorption of the surge pressure to the oil supply pipe 2 side,
The discharge is throttled to set a constant discharge time to prevent a sudden discharge, and the degree of throttle is set so that the discharge time is shorter than the generation cycle of the surge pressure after the secondary wave. In other words, the throttle check valve 22 functions to narrow the opening of the flow path, narrow the flow rate, decrease the flow rate of the fluid, reduce the flow velocity, and decrease the pressure. The throttle check valve 22 shown in the figure is a throttle valve 23 having such a function and a check valve 2.
4 is arranged in parallel, the throttle valve 23 functions from the accumulator 14 side to the oil supply pipe 2 side, and the check valve 24 only flows from the oil supply pipe 2 side to the accumulator 14 side. Is allowed.

The throttle valve 2 of the throttle check valve 22
The throttle degree of 3 is set so that the discharge from the accumulator 14 to the oil supply pipe 2 is performed within a fixed discharge time. In other words, although this discharge time is not instantaneous,
It is set to a relatively short time. That is, the oil supply pipe 2
The surge pressure in the inside periodically and gradually attenuates with the primary wave, the secondary wave, the tertiary wave, the quaternary wave, etc. (usually, it is sufficient to mark up to the quaternary wave). Is about 2 to 5 seconds, for example. Therefore, the discharge time from the accumulator 14 to the oil supply pipe 2 via the throttle check valve 22 is set to be shorter than the generation period of such surge pressure. That is, the throttle check valve 22
The throttle degree of the throttle valve 23 is set so as to achieve such a discharge time. In the illustrated example, the throttle check valve 22 is interposed closer to the accumulator 14 than the manually operated valve 7. However, the interposed position of the throttle check valve 22 in the branch pipe 15 is different from the illustrated example. The present invention is not limited to this, and may be interposed between the valve 7 and the oil supply pipe 2. Throttle check valve 2
No. 2 is like this.

The present invention is configured as described above. Then, it becomes as follows. When the refueling is interrupted, stopped, or terminated when refueling the aircraft A, the pressure of the fuel oil rapidly rises in the refueling pipe 2, but the surge pressure generated in this way is transmitted to the branch pipe 15 and the throttle check valve 22. Is temporarily absorbed by the accumulator 14 through the check valve 24 and the like. In this way, the surge pressure can be reliably absorbed by the accumulator 14 as in the prior art. Thereafter, the pressurized fuel oil absorbed and stored in the accumulator 14 is discharged from the accumulator 14 to the fuel supply pipe 2 via the branch pipe 15 in which the throttle check valve 22 is interposed. . Then, the following first and second cases are obtained.

First, a predetermined throttle check valve 22 is interposed in the middle of the branch pipe 15, and the throttle valve 23 restricts the flow of the discharged fuel oil. Therefore, the discharge from the accumulator 14
The ejection is performed slowly and slowly over a certain ejection time, and instantaneous sudden ejection is avoided.

Note that the surge pressure is
Since the second wave and the third wave are periodically generated although gradually attenuating, the throttle of the throttle check valve 22 is controlled so that the above-described discharge time becomes shorter than the generation period of the surge pressure. The degree of restriction of the valve 23 is set. Thus, the discharge of the previous wave from the accumulator 14 is performed within a relatively short time so that the accumulator 14 does not interfere with the absorption of the surge pressure of the next wave. . That is, when refueling the aircraft A once, the pressure regulating valve 9 and the on-off valve on the aircraft A side are turned on and off.
The start of refueling by turning off (opening / closing) and the interruption, stop, and end of refueling are often performed many times, and the two may be switched around at any time. If the discharge time of the surge pressure of the previous wave from the accumulator 14 is excessively long, there is a possibility that absorption of the surge pressure of the next wave may be hindered. Since this is set to be shorter than the generation cycle of the above, there is no such fear.

Secondly, these are realized by a simple configuration in which a predetermined throttle check valve 22 is interposed in a branch pipe 15 to the accumulator 14.
That is, for example, the throttle check valve 22 including the throttle valve 23 and the check valve 24 in the illustrated example is interposed with the accumulator 14 and the branch pipe 15 which are conventionally used.
Only by adding, as described above, abrupt ejection can be avoided.

[0022]

As described above, the refueling vehicle according to the present invention exhibits the following effects by adopting a configuration in which a predetermined throttle check valve is interposed in the middle of the branch pipe to the accumulator. .

First, abrupt discharge from the accumulator is prevented, thereby protecting the accumulator. In other words, in this refueling vehicle, the discharge of fuel oil from the accumulator to the refueling pipe is performed slowly and slowly over a fixed discharge time by an interposed throttle check valve, and a rapid discharge is avoided. Is done. Therefore, as in the above-mentioned conventional example, with a sudden sudden discharge,
Vibration, abnormal noise, damage, breakage, and the like do not occur in the accumulator, and the accumulator is reliably protected.

Second, and this is easily and easily realized. That is, in this refueling vehicle, the first point described above is easily realized by adopting a configuration in which a predetermined throttle check valve is interposed in the branch pipe to the accumulator, that is, by adopting a simple configuration. Is also excellent. As described above, the effects exerted by the present invention are remarkable and large, for example, all the problems existing in this type of conventional example are solved.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram illustrating a refueling vehicle according to an embodiment of the present invention, illustrating a refueling pipe, refueling equipment, and the like.

FIG. 2 is an explanatory diagram of an oil supply pipe, oil supply equipment, and the like for explanation of this type of conventional example.

FIG. 3 is an explanatory front view showing a refueling state by a refueling vehicle.

[Explanation of symbols]

 Reference Signs List 1 refueling equipment 2 refueling pipe 3 refueling nozzle 4 refueling hose 14 accumulator 15 branch pipe 22 throttle check valve A aircraft

Claims (2)

[Claims] 1. A refueling vehicle in which fuel oil is fed to an aircraft after passing through a refueling pipe provided with refueling equipment and then supplied to an aircraft by a refueling hose having a refueling nozzle at an end thereof. A refueling vehicle comprising: an accumulator branched and connected through a branch pipe to absorb a surge pressure generated in the refueling pipe; and a throttle check valve interposed in the branch pipe. . 2. The refueling vehicle according to claim 1, wherein the throttle check valve is interposed so as to function from the accumulator side to the refueling pipe side, and the accumulator is absorbed by absorbing the surge pressure. When discharging the fuel oil in the pressurized state accumulated in the oil supply pipe side, a fixed discharge time is set by restricting the discharge to prevent a sudden discharge, and the discharge time is reduced by the surge pressure. A refueling vehicle, wherein the degree of throttle is set so as to be shorter than the generation cycle of the secondary wave and thereafter.