JP3308803B2 - Oil liquid 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 an oil / liquid delivery vehicle for delivering / supplying an oil / liquid mounted in an on-vehicle tank by a pump driven by a vehicle engine.

[0002]

2. Description of the Related Art Conventionally, kerosene or the like is supplied to a home tank or a poly tank provided in each home by an oil / liquid delivery vehicle in consideration of road conditions, etc. It was common to use a delivery car. However, in cold regions, kerosene consumption is high, and small delivery vehicles of less than 2 kiloliters may make several round trips to and from the gas station and delivery destination.
Medium-sized delivery vehicles equipped with medium tanks of about 4 kiloliters have become mainstream.

[0003] However, in a medium-sized delivery vehicle, the vehicle is often too large to reach the refueling destination, and therefore, the length of the refueling hose is set to about 40 meters.

[0004] By the way, if the oil supply hose is lengthened, a pump having a larger output must be used accordingly. In a medium-sized delivery vehicle, a high-rotation type turbine pump using a vehicle-mounted battery mainly used in a small delivery vehicle as a power supply is used. Instead, a low-speed vane pump driven by an engine is used.

[0005]

SUMMARY OF THE INVENTION
Because it is designed to discharge a large flow at high pressure,
The fluid tightness is designed to be very high, and when the refueling is stopped by the hand valve of the refueling nozzle, the oil liquid remains in the refueling hose at a high pressure.

[0006] As a result, it takes a great deal of labor to route the refueling hose, which is a major problem in workability.

[0007] In addition, since the oiling hose is of a long length, it is usually wound around a hose reel in consideration of the storage capacity of the hose. It is difficult to wind up the refueling hose on the hose reel manually after refueling,
Like the pump, the hose reel is driven by the engine, and the hose reel is forcibly wound.

For this reason, cracks or breaks in the refueling hose,
Pipeline leakage and other effects on the piping system are very large, which has been a problem in the durability of the piping system.

Further, since the drive stop of the turbine pump can be controlled by the control means, for example, when preset lubrication is continuously performed after so-called normal lubrication in which lubrication is stopped by a hand valve of a lubrication nozzle, once the normal lubrication is performed, If the pump is stopped by the control means, the oil liquid in the hose is quickly returned to the tank due to the structure of the pump, so if the pump is driven again thereafter, the oil liquid is fed into the hose again, The filling amount of the hose can be measured, and the value can be read out as a correction amount to the preset refueling, and the refueling amount can be corrected.However, in a medium-sized delivery vehicle, the pump is driven by the engine and a vane pump with high liquid tightness is used. Therefore, even if you try to perform preset refueling after normal refueling, the pump remains in the running state. Also, the hydraulic fluid in the hose does not return to the tank remains filled in the hose, could not also not be measured loading hoses performs preset fueling.

An object of the present invention is to provide an oil liquid delivery vehicle which can solve the above-mentioned problems.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a tank for storing an oil liquid, an oil supply line having one end connected to the tank, and a fuel supply line interposed in the oil supply line. Liquid-tight pump driven by the engine of the vehicle
And a refueling amount detecting means, a refueling hose connected to the other end of the refueling pipeline, a refueling nozzle connected to a tip of the refueling hose, and displaying a refueling amount based on a signal from the refueling amount detecting means. An oil liquid delivery vehicle for metering and supplying oil by the pump is usually closed during refueling and opened during non-refueling to increase the oil pressure on the discharge side of the pump. Recirculation means for returning to the tank side, presetting means for presetting the refueling amount at the time of preset refueling, refueling stopping means for stopping refueling when the refueling amount reaches the amount preset by the presetting means at the time of preset refueling, Means for detecting a stop; and when the detection means detects the operation of the pump, the recirculation means is closed for a predetermined time, and the amount of oil filled in the oil supply hose is determined by the oil amount detection means. Control means for detecting and storing as a hose filling amount, reading as a correction amount when the hose filling amount could not be measured before starting the subsequent preset refueling, and subtracting and correcting from the preset refueling amount. The point is to provide a car.

[0012]

According to the present invention, the recirculation means is provided for returning the hydraulic fluid pressure on the discharge side of the pump to the tank side when pressure is unnecessary. Therefore, even if the pump and the engine are connected, the oil supply standby state is provided. In this case, the hose is only filled with the low-pressure oil solution, so that the handling of the hose and the storage in the hose reel are improved.

A recirculation means for returning the hydraulic fluid pressure on the discharge side of the pump to the tank side when no pressure is required, a preset means for presetting a refueling amount during preset refueling, and a refueling amount preset at the preset refueling. A refueling stop means for stopping refueling when the amount reaches a predetermined value, the power is turned on / off in conjunction with the drive / stop of the pump,
Immediately after the power is turned on, the recirculation means is closed for a predetermined time, the amount of oil liquid filled in the refueling hose is detected by the refueling amount detecting means and stored as a hose filling amount. Control means for reading out the correction amount when the hose filling amount could not be measured and subtracting correction from the preset refueling amount is provided, so that preset vehicles can be refueled even with a delivery vehicle that refuels with a pump driven by an engine. become.

[0014]

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 an oil liquid delivery vehicle according to one embodiment of the present invention. 1 is a tank for storing oil liquid, 2 is a PTO (power take-out device). At the time of refueling, the output of the engine 3 of the vehicle is transmitted to the pump 4, and high-pressure, large-flow oil can be supplied from the refueling nozzle 7 with the hand valve via the refueling line 5 and the refueling hose 6.

The refueling hose 6 is usually wound around a hose reel 8, and this hose reel 8 is
It is linked with 2. That is, positive displacement circulation pumps 9, 10 are provided on the output shaft of the PTO 2 and the rotation shaft of the hose reel 8, respectively, and the respective pumps are connected by the hydraulic pipeline 11 so that oil circulates. . Further, a manual ball valve 12 is interposed in the middle of the hydraulic pipeline 11 so that the amount of circulating oil can be adjusted.

With the above configuration, when the PTO 2 is connected, the circulating pump 9 rotates and pumps oil to the circulating pump 10 on the hose reel 8 side. Then, the circulation pump 10 rotates and the hose reel 8 also rotates at the same time. At this time, by adjusting the opening and closing of the ball valve 12, the rotation speed of the hose reel 8 can be changed.

The PTO 2 is provided with a power switch 14 for turning on and off the power of a power-supplied unit 13 in accordance with the driving and stopping of the pump 4 (this power switch 14).
May be a sensor that detects the displacement of the PTO lever, an encoder that detects the rotation of the pump 4, a pressure switch that detects the pressure in the oil supply line 5, and the like.

The refueling line 5 has a flow meter 15 for converting a flow rate into a pulse and outputting a pulse signal, and a preset solenoid valve (usually a refueling stop means for stopping refueling when a preset refueling amount is reached during preset refueling). Open) 16.

By the way, since the pump 4 uses a vane pump having a high liquid tightness, the refueling nozzle 7 is normally used during refueling.
In order to prevent a predetermined pressure or more from being applied to the refueling line 5 or the refueling hose 6 when the refueling is interrupted by the hand valve or when the preset solenoid valve 16 is closed at the end of the preset refueling, the oil is supplied before and after the pump 4. Is provided with a return line 18 via a relief valve 17.

When the pump 4 is stopped or when the PT
O2 is connected to drive the pump 4. However, when the pressure of the oil liquid is not required, that is, during the oil refueling standby or the like, recirculation means for quickly releasing the pressure in the pipe is provided before and after the pump 4, This recirculation means is composed of a recirculation line 19 and a recirculation solenoid valve (normally open) 20.

Reference numeral 21 denotes an operation unit, a display 22 for displaying a refueling amount, a preset switch 23 and ten keys 24 as preset means for presetting the refueling amount at the time of preset refueling, a start switch 25 for outputting a refueling start signal, Stop switch 26 that outputs a refueling stop signal
And so on.

Reference numeral 27 denotes a battery provided in the vehicle. When the power switch 14 is turned on, power is supplied to the power-supplied portion 13 including the flow meter 15, the solenoid valves 16, 20 and the control means 28. Has become.

Reference numeral 28 denotes a control means comprising a conventionally known microcomputer or the like, which displays various data on the display 22 based on signals from the flow meter 15 and each switch,
The solenoid valves 16 and 20 are controlled.

Reference numeral 29 denotes a battery connected to the control means 28, which is a backup power supply for the control means 28.

Next, the use and operation of the present invention will be described with reference to FIG.

This device is a PTO until it arrives at the refueling station.
2 is not connected, the pump 4 is stopped, the power is not supplied to the power-supplied unit 13, and the return solenoid valve 20 and the preset solenoid valve 16 are both open. Only the low-pressure oil liquid remains in the oil supply line 5 and the oil supply hose 6.

When the worker arrives at the refueling place, the engine 3 is set in an idling state, and when the PTO 2 is connected, the pump 4 is driven and the power switch 14 provided on the PTO 2 is turned on (step 1), and the battery 27 is turned on.
Then, power is supplied to the power-supplied unit 13, and the oil liquid in the tank 1 is started to be discharged by the pump 4.

At the same time when the power is turned on, a control signal for closing the return solenoid valve 20 is output from the control means 28,
At the same time as the return solenoid valve 20 is closed, a flow rate pulse is output from the pulse transmitter of the flow meter 15, and the control means 28 that has received the pulse immediately starts measuring the flow rate (step 2).

After that, the oil supply hose 6 is filled with a high-pressure oil solution, and when the pressure becomes higher than a predetermined value, the relief valve 17 opens,
Excess oil is returned from the return line 18 to the suction side of the pump 4.

Until this state is reached, the time is counted by a timer provided in the control means 28, and when the time T1 (about several seconds based on the experimental value) elapses (step 3), the control means 28 to return solenoid valve 20
Is output to open the recirculation solenoid valve 20, and the measured flow rate is temporarily stored in the control means 28 as the hose filling amount Q, and the apparatus enters a standby state (step 4).

When performing normal refueling from this state,
When the start switch 25 is turned on (step 5), the signal is input to the control means 28, a signal for closing the return solenoid valve 20 is output from the control means 28, the return solenoid valve 20 is closed (step 6), and the high pressure Since the oil liquid can be discharged from the oil supply nozzle 7, the operator pulls out the oil supply hose 6 from the hose reel 8, brings the oil supply nozzle 7 to the destination, and opens the hand valve of the oil supply nozzle 7 to perform oil supply. Then, a flow rate pulse is output from the pulse transmitter of the flow meter 15 to the control means 28, and the control means 28 outputs the signal as a flow rate signal to the display unit 22, so that the refueling amount is sequentially displayed on the display unit 22. Go.

When refueling is completed, the vehicle is returned to the vehicle with the refueling nozzle 7 and the stop switch 26 is turned on (step 7).
8 outputs a signal to open the return solenoid valve 20, and the return solenoid valve 20 is opened (step 8).
The oil liquid in the tank is returned to the tank 1 side from the reflux line 19 to some extent, the pressure of the oil liquid in the oil supply hose 6 decreases, and the apparatus enters a standby state.

When the worker opens the ball valve 12 in order to wind the oil supply hose 6 around the hose reel 8,
The oil in the hydraulic line 11 is sent to the circulation pump 10 from the circulation pump 9 which is still connected to the PTO 2,
The hose reel 8 starts rotating in the direction in which the oil supply hose 6 is wound up.

At this time, since the return solenoid valve 20 is open, the oil supply hose 6 can be wound up relatively easily even if the pump 4 continues to be driven.

When all the hose reels 8 have been wound, the ball valve 12 is closed, the rotation of the hose reels 8 is stopped, and the amount of refueling displayed on the display 22 is checked. When the vehicle is disconnected, the power switch 14 is turned off (step 17), and the refueling operation is completed. In this state, while the vehicle is moved to the next refueling station or returned to the refueling station, the oil liquid in the pipes is discharged. It is immediately returned to the tank 1 from the return line 19 and the refueling hose 6
The low-pressure oil liquid remains inside.

Next, when performing preset lubrication,
When the preset switch 23 is turned on from the standby state (step 9) and a desired preset refueling amount P is set using the numeric keypad 24 (step 10), those signals enter the control means 28, and the control means 28 Is determined to be the preset refueling, and the preset refueling amount P is stored.

When the start switch 25 is turned on (step 11) as in the case of normal refueling, the return solenoid valve 20 is closed (step 12), the oil in the refueling hose 6 is filled, and the refueling is performed at the destination. The refueling can be started by opening the hand valve of the nozzle 7. However, since the preset refueling is stopped by the preset solenoid valve 16 of the refueling pipe line 5, when the preset refueling amount P is reached, the preset refueling is started. When the solenoid valve 16 is closed, the start switch 2
When the oil supply hose 5 is turned on, the oil is replenished by the amount of the oil filling the oil supply hose 6.

For this reason, in the present preset refueling, the control means 28 reads out the hose filling quantity Q stored when the power is turned on, and reads the preset refueling quantity P
The flow rate pulse sent from the pulse transmitter of the flow meter 15 is counted, and when the refueling amount becomes PQ (step 13), the preset solenoid valve 16 is closed. (Step 14).

When the preset refueling is completed, the stop switch 26 is turned on in the same manner as in the normal refueling (step 15), and the return solenoid valve 20 and the preset solenoid valve 16 are opened (step 16). The refueling hose 6 is wound up, the amount of refueling is processed in a slip, the PTO 2 is separated, and the power switch 14 is turned off (step 17).

Next, there is a case where the preset refueling is continuously performed without disconnecting the PTO 2 after the normal refueling. However, after the normal refueling is completed, the stop switch 26 is turned on, and once the standby state is established, the return electromagnetic wave is returned. Although the valve 20 is open, the pump 4 is still driven, and the oil supply hose 6 is filled with the oil liquid at a certain pressure. As in the case of the preset refueling, the oil is replenished by an amount corresponding to the amount of the oil liquid filled in the refueling hose 6. The amount Q is read out and the subtraction process is performed from the preset refueling amount P to terminate the preset refueling.

[0042]

Since the present invention is constructed as described above, only a relatively low pressure is applied to the piping when the pump is stopped or when the pump is in a standby state even if the pump is in a driving state. Therefore, the handling of the refueling hose, the ease of storing the hose on the hose reel, and the durability of the refueling hose are improved.

In addition, it is possible to perform preset refueling, which was impossible with a conventional oil-liquid delivery vehicle that refuels with a highly liquid-tight pump driven by an engine as a driving source, and is extremely convenient for refueling workers. In addition to the above, it is possible to provide a device which can better meet customer needs.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an oil liquid delivery vehicle according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 tank 2 PTO 3 engine 4 pump 5 oil supply line 6 oil supply hose 7 oil supply nozzle 14 power switch 15 flow meter 16 preset solenoid valve 19 return line 20 return electromagnetic valve 22 indicator 23 preset switch 24 numeric keypad 28 control means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-127491 (JP, A) JP-A-63-75808 (JP, A) JP-A-61-152597 (JP, A) JP-A-7-127 206099 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B67D 5/30

Claims (1)

(57) [Claims] 1. A tank for storing an oil liquid, an oil supply line having one end connected to the tank, and a highly liquid-tight pump driven by an engine of a vehicle interposed in the oil supply line. And a refueling amount detecting means, a refueling hose connected to the other end of the refueling pipeline, a refueling nozzle connected to a tip of the refueling hose, and a refueling amount based on a signal from the refueling amount detecting means. In an oil liquid delivery vehicle, which comprises a display for displaying and supplies oil by the pump, the oil liquid is normally closed during refueling and opened during non-fueling to open the oil pressure on the discharge side of the pump. Recirculation means for returning to the tank side; preset means for presetting a refueling amount during preset refueling; refueling stopping means for stopping refueling when the refueling amount reaches an amount preset by the preset means during preset refueling; Means for detecting the drive / stop of the pump, and when the detection means detects the drive of the pump, the recirculation means is closed for a predetermined time and the amount of oil liquid filled in the oil supply hose is detected by the oil supply amount detection means. Control means for storing as a hose filling amount, reading as a correction amount when the hose filling amount could not be measured before the start of subsequent preset refueling, and subtracting and correcting from the preset refueling amount. car.