JP3026927B2 - Kerosene delivery vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kerosene delivery vehicle for delivering kerosene to factories and ordinary households.

[0002]

2. Description of the Related Art A delivery vehicle of a type in which kerosene is supplied using a pump driven by a vehicle engine (hereinafter referred to as PT).
O lorry), compared to a delivery car that supplies kerosene using a motor-driven pump that is driven by the electric power of the vehicle's battery, the pump capacity is considerably higher due to the difference in the drive source. Using its capacity, use a large-diameter oil supply channel, that is, a large-diameter pipeline and a large-diameter hose to directly refuel a large-capacity fixed tank such as a factory underground tank. Was commonly done.

In addition, kerosene is branched from the large-diameter oil supply passage through a switching valve so that kerosene can be supplied from a PTO lorry to a small transport container such as a home tank or a plastic container installed in a garden or the like of a general house. There is a small-diameter oil supply passage, that is, a small-diameter pipeline, a small-diameter hose, and a lubrication nozzle with a hand valve provided at the end of the hose, so that lubrication can be performed with low discharge.

As described above, kerosene can be supplied from a PTO lorry to various tanks and containers. However, only when supplying fuel to a small transport container, the kerosene splashes or spills. In order to prevent the risk of overflow and overflow, and to minimize the amount even if it overflows, rather than refueling at the maximum discharge rate provided by the refueling system, it was specified by the Fire Service Law. It is mandatory to refuel at a safe discharge rate (in this case, 60 liters per minute), so adjust the opening of the refueling nozzle's hand valve and refuel at a discharge rate of 60 liters per minute or less. Or the opening of the hand valve of the refueling nozzle is set to the maximum discharge rate and 60 minutes per minute.
A simple stopper is provided so that it can be adjusted in two stages with a discharge amount of less than 1 liter.
The refueling is performed by adjusting the discharge amount with a manual valve provided in the middle of the refueling passage.

[0005]

However, since it is difficult to reliably control the discharge rate to 60 liters per minute or less by the method of adjusting the opening degree of the hand valve of the refueling nozzle, it is difficult to reduce the discharge rate to 60 liters per minute. Refueling is performed at a considerably lower discharge rate, and it takes longer than necessary to refuel, and the operator has to keep holding the hand valve with a certain amount of force, which places a burden on the operator.

In a method of providing a simple stopper at a hand valve of a refueling nozzle or a method of providing a manual valve in a refueling passage, the discharge condition is constant, that is, the pump capacity, piping condition, nozzle head difference, and the like are constant. Is valid for
In the TO lorry, the condition is not considered to be constant, and it is not possible to cope with the fluctuation. In particular, since the pump is driven by the engine of the vehicle, the discharge amount is directly affected by the variation in the rotation of the engine. It was unstable and could not always be refueled at a safe discharge rate.

[0007] It is an object of the present invention to provide a kerosene delivery vehicle which can solve the above problems.

[0008]

In order to achieve the above object, the present invention provides a tank for storing kerosene, a pump driven by an engine of a vehicle, and a relief valve provided between a discharge side and a suction side of the pump. A large diameter oil supply path which discharges kerosene pumped from the pump at a high rate, and a branch valve from the large diameter oil supply path via a switching valve to reduce kerosene pumped from the pump. In a kerosene delivery vehicle provided with a small-diameter oil supply passage for discharging, a discharge-amount detection means for detecting an amount of discharge from the small-diameter oil supply path, and a valve driving means for gradually displacing a valve element from a fully opened state to a fully closed state. A control valve for varying the discharge amount from the small-diameter oil supply passage, setting means for setting a mode for performing refueling at a legally safe discharge amount, and at the start of the refueling mode, controlling the valve driving means, Statutory control valve opening At a position predicted to be a target discharge amount within a predetermined range equal to or less than the total discharge amount, a signal from the discharge amount detecting means is constantly monitored during refueling in the refueling mode, and the discharge amount is set to the predetermined amount. The gist of the invention is to provide a kerosene delivery vehicle comprising: a control unit that controls the valve driving unit to move the control valve opening to a position that converges to the target discharge amount if the range deviates from the range. .

[0009]

According to the present invention, it is possible to easily set the legally required safe discharge amount when supplying kerosene from a PTO lorry to a small transport container. Oil can be supplied in the vicinity of the legally safe discharge amount.

[0010]

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an explanatory view showing the overall structure of a fueling device mounted on a kerosene delivery vehicle according to one embodiment of the present invention, wherein 1 is a tank for storing kerosene, and 2 is a PTO (power take-out). When the fuel is supplied, the output of the engine 3 of the vehicle is transmitted to the pump 4 so that kerosene can be pumped at a considerably high discharge rate (about 250 liters per minute).

The discharge side of the pump 4 is provided with a large-diameter oil supply passage 6 used for refueling a large-capacity underground tank or the like in a short time via a switching valve 5 capable of manually switching a pipeline. It is connected to a small-diameter oil supply passage 7 used when refueling a small-capacity tank such as a tank or a small transport container, and depending on the handle position of the switching valve 5, whether the large-diameter oil supply passage 6 is opened. It is possible to select whether the small-diameter oil supply passage 7 is opened or both are closed.

Further, a return line 9 connecting the discharge side and the suction side of the pump 4 through a relief valve 8 is provided. The return line 9 closes the switching valve 5 or switches to the small-diameter oil supply path 7. Thus, when a predetermined or more discharge pressure is applied to the discharge side of the pump 4, the pressure can be released.

By the way, the small-diameter oil supply passage 7 converts the discharge amount into a pulse and outputs a pulse signal to the small-diameter oil supply passage 7.
Amount detection means 10 (the range of detectable discharge amount is about 10 liters per minute to about 120 liters per minute) for detecting the discharge amount of kerosene discharged from the nozzle, and the discharge amount from the small diameter oil supply passage 7 is variable A control valve 11 is provided at the front end, and a refueling nozzle 12 with a hand valve for interrupting or terminating refueling is provided at the tip.

In this embodiment, the large-diameter oil supply passage 6 is also provided with a high-discharge-amount detecting means 13 for detecting a high discharge amount (a detectable discharge amount ranges from 25 liters to 250 liters per minute). At the time of refueling, a hose provided with a connecting member 14 at the end for connecting to a refueling port such as an underground tank is connected.

In the high discharge amount detecting means 13, the range of the discharge amount detectable by the discharge amount detecting means 10 is from about 10 liters per minute to about 250 liters per minute.
It is not necessary to provide the discharge amount detection means 10 if the discharge amount can be detected from both oil supply paths. In this case, the discharge amount detection means 10 is provided upstream of the switching valve 5 and What is necessary is just to make it possible to detect even the discharge amount of.

Reference numeral 15 denotes an operation unit. An indicator 16 for displaying refueling data and the like, and an 18-liter preset switch 17 (home) for setting a refueling mode at a legally safe discharge rate of 60 liters per minute or less. And a setting switch 18 that is used when refueling other small transport containers that are not preset but are also required to refuel at a legally safe discharge rate. An operation switch 19 that allows the opening degree of the control valve 11 to be adjusted in various patterns depending on whether the switch is turned on after the operation or turned on without the operation.
And a numeric keypad 20 for inputting an appropriate amount of refueling, and a power switch 2 for turning on the display 16 and putting it in a standby state.
1 and so on.

Reference numeral 22 denotes a battery provided in the vehicle, which is connected to the power-supplied unit 23.

Reference numeral 24 denotes a control means comprising a conventionally known microcomputer or the like, which causes the display 16 to display data on the basis of signals from the discharge amount detecting means 10, the high discharge amount detecting means 13 and the switches of the operation unit 15. And adjusting the opening of the control valve 11 to execute various refueling modes.

Reference numeral 25 denotes a battery connected to the control means 24, which is a backup power supply for the control means 24, which constantly supplies enough power that the control means 24 can hold itself.

FIG. 2 shows the structure of the control valve 11, in which reference numeral 26 denotes a motor which is a valve driving means provided with a speed reducer 27, reference numeral 28 denotes a ball valve which opens and closes the small-diameter oil supply passage 7, and reference numeral 29 denotes a ball valve. The gear that rotates the shaft 30 drives the motor 26 in the forward and reverse directions to open and close the ball valve 28, thereby adjusting and closing the flow rate of the small-diameter oil supply passage 7.

Reference numeral 31 denotes an encoding disk integrally mounted on the gear 29, and reference numerals 32, 33 denote signal holes 34, 35, 3 formed in a peripheral portion of the encoding disk 31.
First and second photocouplers for detecting 6, 37 and 38 are used for detecting the valve opening of the ball valve 28.

That is, as shown in the main part plan view of FIG. 3, the signal holes 34 and 35 are set so as to be detected by the first and second photocouplers 32 and 33 at the fully open position of the ball valve 28, respectively. As the ball valve 28 is closed,
The first photocoupler 32 sequentially detects the signal holes 36 and 37 and detects the signal hole 38 when the ball valve 28 is fully closed. The maximum flow rate when the ball valve 28 is fully opened is about 120 liters per minute. On the other hand, it is set so as to reduce the flow rate to about 55 liters per minute at the signal hole 36 detection position (control valve throttle position A) and to about 20 liters per minute at the signal hole 37 detection position (control valve throttle position B). Have been.

Next, the use and operation of the present invention will be described.

First, a refueling method usually performed by a PTO lorry, using a large-diameter refueling passage 6,
A case of refueling a large capacity tank such as an underground tank in a factory will be described.

The worker arriving at the refueling station checks the position of the switching valve 5 and confirms that the switching valve 5 is closed. Then, the operator connects the PTO 2 without turning off the engine 3 of the vehicle, drives the pump 4 and operates the pump 4. The power switch 21 of the unit 15 is turned on, the control unit 24 is turned on, and a standby state is set.

At this time, the kerosene in the tank 1 is discharged by the pump 4, but since the switching valve 5 is closed, the discharged kerosene pushes the relief valve 8 through the return line 9 to open the suction valve of the pump 4. Side, so that no extra load is applied to the pump 4.

Next, the worker connects the connecting member 14 at the tip of the large-diameter oil supply path 6 to the oil supply port of the underground tank, and switches the switching valve 5 to open the large-diameter oil supply path 6. From 6 the refueling at the maximum discharge rate of the pump (about 250 liters per minute) is started, and the control means 24
A pulse signal is sent from the high discharge amount detecting means 13, and the control means 24 calculates the signal as a refueling amount and causes the display 16 to integrate and display the refueling amount.

After the appropriate amount of refueling is completed, the switching valve 5 is closed, the refueling is terminated, the connection of the PTO 2 is disconnected, the final refueling amount displayed on the display 16 is confirmed, and then the power switch 21 is turned off. .

In this manner, the refueling can be completed in a short time by utilizing the high discharge property of the PTO lorry.

Next, FIG. 4 shows a case in which a small tank oil supply path 7 is used to supply oil to a home tank or a small transport container.
It will be described based on.

First, when refueling the home tank, the worker arriving at the refueling place confirms that the switching valve 5 is in the closed position, connects the PTO 2 to drive the pump 4, and turns the power switch 21 on. Is turned on (step 1), the power is turned on to the control means 24 (step 2), and the switching valve 5 is further operated to open the small-diameter oil supply passage 7.

Here, if the 18 liter preset switch 17 is pressed (step 3), a preset refueling mode in which 18 liters of refueling is performed at a discharge rate of 60 liters per minute or less (step 4), and the setting switch 18 is pressed. (Step 5), the refueling mode is performed at a discharge rate of 60 liters or less per minute regardless of the refueling amount (Step 6),
When the operation switch 19 is pressed (step 7), the normal refueling mode is performed at the maximum discharge rate (about 120 liters per minute) in the small-diameter refueling passage 7. Here, the refueling is performed for the home tank. Since there is no particular rule, the operation switch 13 is pressed to perform normal refueling (step 7).

Then, the signal enters the control means 24 to enter the normal refueling mode, a normal refueling signal is output to the control valve 11, the motor 26 of the control valve 11 rotates, and the first and second photocouplers 32, 33 are activated. Stop at the position where the signal holes 34 and 35 of the encoding disk 31 are detected, the ball valve 28 is fully opened (step 8),
Refueling can be performed at a liter discharge rate.

When the fuel supply nozzle 12 is inserted into the fuel supply port of the home tank and the hand valve is opened, a pulse is output from the discharge amount detecting means 10 and the control means 24 which receives the pulse converts the pulse into a flow rate and displays it. The refueling amount is integrated and displayed on the heater 16.

During this time, the pump 4 continues to discharge at a maximum discharge rate of about 250 liters per minute. However, since the oil supply passage is small in diameter, the pump 4 is actually discharged from the small diameter oil supply passage 7 at about 120 liters per minute.
Only the liter is discharged, and the excess discharge is returned from the return line 9 to the suction side of the pump 4.

When the required amount of oil has been supplied, the nozzle 12
When the operation switch 19 is pressed again (step 9), the signal enters the control means 24 to enter the standby mode, the motor 26 of the control valve 11 is rotated, and the first photocoupler 32 is moved to the encode disk 31. Stop at the position where the signal hole 38 is detected, and the ball valve 28 is closed (step 10), so that the operator confirms the final refueling amount displayed on the display 16 and ends the refueling.

At this time, if any one of the preset switch 17, the setting switch 18 and the operation switch 19 is further pressed (steps 3, 5, and 7), refueling in each mode can be continued, and at this point If the refueling has been completed, press the power switch 21 (step 1).
1) Turn off the power to the control means 24 (step 1)
2) Then, the operation of the pump 4 may be stopped by separating the PTO 2.

Next, in a case where preset oiling is performed for an 18-liter plastic container, in this case, it is confirmed that the switching valve 5 is also closed, and the PTO 2 is connected.
After the pump 4 is driven, the power switch 21 is pressed (step 1), and the power is supplied to the control means 24 (step 2), the switching valve 5 is operated to open the small-diameter oil supply passage 7, and the preset switch 17 is turned on. If it is pressed (step 3), the operation enters the preset refueling mode, so that the operation switch 19 is continuously pressed as shown in FIG. 5 (step 13).

Then, the signal enters the control means 24, a signal is output to the control valve 11, the motor 26 of the control valve 11 rotates, and the position at which the first photocoupler 32 detects the signal hole 36 of the encode disk 31. To stop the control valve at the throttle position A (step 14), and it becomes possible to perform refueling at a target discharge rate of about 55 liters per minute, that is, a legally safe discharge rate. The refueling nozzle 12 is inserted into the refueling port of the container, and the hand valve is opened to refuel.

However, during refueling, there is a variation in the number of revolutions of the engine 3, there is a slight clogging of the refueling passage (such as clogging of a strainer provided in the middle of the pipe line), the routing of the refueling hose, and the refueling nozzle 12. The discharge amount may fluctuate due to the difference in the height of the ink. for that reason,
The control means 24 constantly monitors the pulse sent from the discharge amount detecting means 10 to determine whether or not the discharge amount Q is within a range of 50 liters to 60 liters per minute. Is detected (step 15), the control means 24 sends the control valve 11
A correction drive signal for driving the motor 26 is output (step 16), and the control valve 1 is controlled to converge to 55 liters per minute.
An opening degree correction of 1 is performed.

More specifically, for example, when the control means 24 deviates from the range, the control means 24 rotates the motor 26 of the control valve 11 forward by T1 milliseconds at predetermined time intervals until the control means 24 once enters the range. Alternatively, after entering the range, the motor 26 of the control valve 11 is rotated forward or backward by T2 (<T1) milliseconds at predetermined time intervals until the target discharge rate reaches 55 liters per minute. A table is provided, and the discharge rate is set to 55
The control means 24 sends the control valve 11
The signal for driving the motor 26 is continuously output, and the signal output is stopped when the discharge amount reaches 55 liters per minute.

In this way, even if the discharge amount is always below the legally safe discharge amount, refueling can be performed with a discharge amount close to the maximum, and refueling can be performed safely and in the shortest time.

Eventually, when the control means 24 detects that the refueling amount P exceeds X liters by a pulse signal from the discharge amount detecting means 10 (step 17), the control means 24 drives the motor 26 of the control valve 11. Signal is output,
The motor 26 of the control valve 11 rotates, the first photocoupler 32 stops at the position where the signal hole 37 of the encode disk 31 is detected, and the control valve throttle position B is set (step 18). To prevent foaming and overflow from the container.

Further, when the control means 24 detects that the refueling has advanced and the refueling amount P has reached 18 liters (step 19), a signal for driving the motor 26 of the control valve 11 is output from the control means 24, and the control is performed. The motor 26 of the valve 11 rotates, the first photocoupler 32 stops at the position where the signal hole 38 of the encode disc 31 is detected, the ball valve 28 is closed (step 20), and the 18-liter plastic container is closed. After the preset refueling is completed, the process exits from the preset refueling mode, and thereafter, in the same manner as in the case of the normal refueling, refueling is continuously performed in each mode (steps 3, 5, and 7), and the power is turned off ( Step 11,
12) Yes.

Next, in the case where oil is supplied to a transport container other than a plastic container having a capacity of 18 liters, oil supply with a legally safe discharge amount is required in this case as well. 5 is closed, the power switch 21 is pressed (step 1), the power is turned on to the control means 24 (step 2), and the small-diameter oil supply passage 7 is opened by operating the switching valve 5, When the setting switch 18 is pressed (step 5), the refueling mode is started at a discharge rate of 60 liters per minute or less. As shown in FIG.
Press 9 (step 21).

Then, similarly to the case of the preset refueling, the control valve 11 becomes the throttle position A (step 22),
While correcting the opening of the control valve 11 (step 23,
24) Refuel the required amount.

After the refueling is completed, when the operation switch 19 is pressed again (step 25), the control valve 11 is closed (step 26), the fuel supply mode is stopped at a discharge rate of 60 liters per minute or less, and each mode can be selected. (Steps 3, 5,
7) Or, the power can be turned off (step 11,
12).

[0049]

According to the present invention, as described above, the statutory safe discharge amount at the time of refueling a small transport container from a refueling device provided in a PTO lorry can be easily set, and the discharge during refueling can be performed. Even if the conditions fluctuate, in particular, even for a PTO lorry where the engine speed directly affects the discharge rate of the pump, what kind of fuel can be always supplied near the legal safe discharge rate that is equal to or less than the legal safe discharge rate? Even under conditions, refueling can be performed reliably and quickly without relying on workers' intuition, and safe refueling can be performed without splashing or spilling of kerosene or foaming and overflowing. It is possible to provide a preset refueling function necessary for efficiently refueling the vehicle.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an oil supply device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a control valve of the device.

FIG. 3 is an explanatory diagram of an encoding disk of the same device.

FIG. 4 is a flowchart showing an overall operation of the apparatus.

FIG. 5 is a flowchart showing a preset operation of the apparatus.

FIG. 6 is a flowchart showing a refueling operation at 60 liters per minute or less of the apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 3 Engine 4 Pump 5 Switching valve 6 Large-diameter oil supply path 7 Small-diameter oil supply path 8 Relief valve 9 Return line 10 Discharge amount detection means 11 Control valve 17 18 liter preset switch 18 Setting switch 24 Control means 28 Ball valve 31 Encode・ Disk 32, 33 Photocoupler

Continuation of the front page (56) References JP-A-63-82998 (JP, A) JP-A-62-135092 (JP, A) JP-A-6-199397 (JP, A) JP-B-6-37237 (JP) 58-16559 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B67D 5/00-5/30

Claims (1)

(57) [Claims] 1. A tank for storing kerosene, a pump driven by an engine of a vehicle, a return line connecting a discharge side and a suction side of the pump via a relief valve, and a pump fed from the pump. A kerosene delivery vehicle having a large-diameter oil supply passage that discharges kerosene at a high rate, and a small-diameter oil supply passage that branches off from the large-diameter oil supply passage via a switching valve and that discharges low-pressure kerosene from the pump. Control to vary the discharge amount from the small-diameter oil supply passage by a discharge-amount detection means for detecting the discharge amount from the small-diameter oil supply passage, and valve drive means for gradually displacing the valve element from fully open to fully closed. A valve, setting means for setting a mode for performing refueling at a legal safe discharge rate, and at the start of the refueling mode, controlling the valve driving means to set the control valve opening within a predetermined range equal to or less than a legal safe discharge rate. At the target discharge rate In the predicted position, during the refueling in the refueling mode, the signal from the discharge amount detection means is constantly monitored, and when the discharge amount deviates from the predetermined range, the valve drive means is controlled, and Control means for setting a control valve opening to a position converging to the target discharge amount.