JP3329363B2 - Oil supply nozzle for oil supply device - 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 supply nozzle suitable for an oil supply device for metering and selling high-viscosity liquids such as engine oils and machine oils having relatively high viscosity and in which bubbles are difficult to remove.

[0002]

2. Description of the Related Art For example, in a facility that consumes a large amount of oil, such as a maintenance shop or a gas station, a required amount of oil is stored in a tank, and the oil is metered and sold as needed. . The supply of oil to such facilities is usually performed using a tank that stores oil in a vehicle and a lorry equipped with a measuring device.

[0003]

However, since engine oil has a very high viscosity compared to fuel oil such as gasoline or light oil, bubbles generated by vibration during transportation are mixed in the oil. There is a problem that measurement using a positive displacement meter includes a large error in the measured value. In order to solve such a problem, the weight is sometimes measured while being stored in a container.However, it is not only necessary to prepare a weight measuring device, but also a weight measuring operation is required. There is a problem that it takes time. In order to solve such a problem, it is conceivable to provide a pressure reducing valve in the refueling nozzle and maintain the pressure in the flow path from the pump to the refueling nozzle including the positive displacement measuring means at a pressure that can crush bubbles. , Because the discharge pressure is higher than fuel oil,
There is a problem that a high pressure acts on the main valve to apply a large pressure to the refueling lever, which makes the lever operation heavy and makes it difficult to adjust the flow rate by lever operation. The present invention has been made in view of such a problem, and an object of the present invention is to reduce a measurement error in a positive displacement flowmeter as much as possible and to reduce a force required for operating a refueling lever. It is an object of the present invention to provide an oil supply nozzle for an oil supply device capable of reducing the oil supply.

[0004]

In order to solve such a problem, according to the present invention, a liquid from a refueling hose is received at an inflow port, and is passed through a main valve which is opened / closed by a refueling lever, from a nozzle cylinder tip. In the refueling nozzle to be discharged, a pressure reducing valve having a valve body whose discharge pressure is adjusted by a pressure setting spring and a diaphragm is provided between the inflow port and the main valve, and the set pressure of the pressure reducing valve is adjusted by the oiling lever. Change in conjunction with the movement, the lever is configured so that the discharge pressure is low in the valve closed state or in the throttled position, and the discharge pressure is reduced in the valve closed state or the throttled position, The lever operation was lightened.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a first embodiment of the present invention. FIG. 1 shows an example in which the present invention is provided.
The weighing device 3 and the hose reel 4 are mounted.

The metering device 3 sucks the oil in the tank 2 through the check valve 10 to reduce the volume of bubbles in the oil to 1/1.
A high-pressure pump 11 capable of pumping at a pressure that can be compressed to about 0, a positive displacement flow meter 12 for measuring oil from the pump 11, a stop valve 25 provided on the discharge port side of the flow meter 12, The pump 13 drives the motor 13 and calculates a refueling amount based on a flow pulse from a flow pulse transmitter 18 of the flow meter 12, and drives and stops the motor 13 by operating a start switch 14 a of the switch box 14. A control device 16 for opening and closing the small valve 25 and a small valve 15 described later, and for driving and stopping the reel motor 21 by operating the winding switch 14b, and a display 17 for displaying the amount of refueling. I have.

The flow meter 12 has a top space 45 (FIG. 3) connected to the tank 2 by a tube 19 via a stop valve 15.

The hose 2 wound around the hose reel 4
Reference numeral 0 denotes a pressure-resistant hose capable of withstanding a pressure enough to compress bubbles contained in the oil, for example, about 10 kg / sq. 38 (FIG. 3), and the other end is connected to the pressure reducing valve 23 of the fueling nozzle 22 which is a feature of the present invention.

FIG. 3 shows an embodiment of the flow meter 12 described above, in which a fluid flowing from an inflow port 30 is supplied to one cylinder via a rotary valve 31 and a port 35 provided in a valve seat 32. 33, the one piston 34 is moved by the pressure of the fluid, and the fluid in the other cylinder 33 'is transferred from the other port 35' to the outlet port of the rotary valve 31, the center port 36 of the valve seat 32, the crank chamber. It flows out from the outlet 38 via 37.

The reciprocating motion of the pistons 34, 34 'is transmitted to the crankshaft 40 via the connecting rods 39, 39' as rotational motion, and the fluid flowing from the inlet 30 through the rotary valve 31 attached to the crankshaft 40 is transmitted. Sequentially into the next cylinders 33, 33 ',
It is configured to cause the fluid to flow from the outlet 7 to the outlet 38.

A through hole 46 for connecting to the tube 19 is provided in a top space 45 containing the rotary valve 31. Further, a slit disc 41 constituting the flow pulse transmitter 18 is attached to the crankshaft 40 via a drive shaft 42.

In this embodiment, the fluid flowing from the inlet 30 selectively flows into the cylinders 33, 33 'by the rotary valve 31 and slides the pistons 34, 34', and at a speed proportional to the flow rate. The slit disc 4 constituting the flow rate pulse transmitter 18 by rotating the crankshaft 40
1 is rotated to output a flow rate pulse proportional to the flow rate from the slit detection means 43 and output it to the control device 16 via the cable 44.

FIG. 4 shows an embodiment of a refueling nozzle according to the present invention. In the drawing, reference numeral 50 denotes a main valve, which is always elastically contacted with a valve seat 52 by a spring 51, A liquid from an outlet 55 of a pressure adjustment chamber 54, which will be described later, is discharged to a nozzle cylinder tip 56.

In the pressure adjusting chamber 54, a valve seat 58 is provided so as to define an inflow port 57 and an outflow port 55. A compression spring 60, whose compression force can be adjusted by a dial 59, is always provided with a valve seat 58. A frusto-conical valve element 61 which is resiliently contacted is accommodated.

A diaphragm chamber 63 is provided below the valve body 61 and communicates with the pressure adjusting chamber 54 through an opening 62. A diaphragm 64 stretched in the diaphragm chamber 63 is provided.
Is connected to the valve body 61 through the diaphragm chamber 63 by a connecting rod 65, and the lower surface of the diaphragm 64 is communicated with the atmosphere through a through hole 70.
Spring 6 connected to operating rod 66 pushed up on the upper surface of
7. A gap G is provided between the end surface of the operating rod 66 and the upper surface of the main valve 50 so as not to come into contact with the operating rod 66 when the main valve 50 is opened or the flow rate is reduced. . In the drawing, reference numeral 68 denotes a seal member, and 69 denotes a through hole provided in the diaphragm 64 for liquid passage.

In this embodiment, when the pressure is set at, for example, 2 kg / square centimeter by the dial 59 and the liquid is supplied from the outlet 57, the oil flowing from the inlet 57 presses the valve body 61 and the valve seat 61 is pressed. The air flows into the pressure adjusting chamber 54 away from the pressure adjusting chamber 58. When the pressure of the inflowing fluid reaches or exceeds the pressure set by the dial 59,
The diaphragm 64 resists the elastic force of the spring 67
The valve body 61 is resiliently contacted with the valve seat 58. As a result, the pressure set by the dial 59 is reduced from the outlet 55 and the oil is discharged to the outlet 55.

Next, the operation of the apparatus thus constructed will be described with reference to FIG.
A description will be given based on the flowchart shown in FIG.
When the start switch 14a is turned on (FIG. 5 step
B) The control device 16 closes the stop valve 25 to maintain the fluid pressure in the hose 20, turns on the pump motor 13 and turns on the tank 2
Is sent to the flow meter 12. At this stage, small valve 15
Is opened for a predetermined time, for example, about 2 seconds, and then closed, and the air accumulated in the top space 45 of the flow meter 12 is discharged to the tank 2 together with the oil by the previous lubrication (step B in FIG. 5). Then, the indicator 17 is returned to zero, and the stop valve 25 is opened to make it possible to refuel (step C in FIG. 5).
During this time, the hose 20 is pulled out from the hose reel 4, and the nozzle 22 is inserted into the oil supply tank.

Immediately after starting the pump, the flow meter 12 and the hose 2
0 and the oil up to the valve body 61 increase in pressure. As a result, the bubbles contained in the oil are compressed to reduce the volume. When the pressure of the valve body 61 reaches the set pressure or more in this way, the valve 61 separates from the valve seat 58 against the urging force of the spring 60, and the oil depressurized by the valve body 61 flows into the nozzle 22 side.

The main valve 50 is opened by raising the oil supply lever 53 of the nozzle 22 to lubricate the oil supply tank. In this case, the oil is reduced to the set pressure of the valve 61 because the valve 61 is in elastic contact with the valve seat 58 at the pressure set by the dial 59. For this reason, since the degree of pressure reduction is large, the pressure applied to the main valve 50 is small, and the lever 53 can be pulled up with a small force.

When the main valve 50 is further pushed upward beyond the gap G in this manner, the operating rod 66 raises the connecting rod 65 via the spring 67. Accordingly, the pressing force of the valve body 61 is reduced by an amount corresponding to the elastic force of the spring 67, so that the pressure reduced by the valve body 61 is reduced, and the oil is slightly higher in pressure from the cylinder tip 56 than at the beginning of valve opening. leak. The oil spilled in this way is supplied to the high pressure pump 11
Although the liquid is sent at a high pressure, the liquid is discharged at a relatively slow flow rate, and the generation of unnecessary bubbles during refueling is prevented.

After the valve is opened, the pressure reduced by the valve body 61 is reduced as described above, so that the flow rate is unnecessarily reduced even at a low temperature in winter or the like, even when the oil has a relatively high viscosity. The refueling can be completed in as short a time as possible.

On the other hand, even when the oil is relatively slowly discharged from the nozzle 2, the flow path from the pump 11 to the valve element 23 is pressurized to about 10 kg / cm 2 by the high-pressure pump 11 and is therefore included in the oil. Since the bubble that has been crushed and flows into the nozzle 22, the volume of the oil bubble passing through the flow meter 12 is extremely small, and the error of the flow meter 12 caused by the bubble is extremely small.

Since the flow pulse is output from the flow pulse transmitter 18 upon refueling (step d in FIG. 5), the controller 16 counts the flow pulses and displays the refueling amount on the display 17 (step e in FIG. 5). When the refueling lever 53 is lowered at the stage when the refueling of a predetermined amount is completed, the operating rod 66
When the valve reaches the bottom dead center, the main valve 50 separates from the operating rod 66, so that the valve body 61 receives the elastic pressure of the spring 60 at the net pressure set by the dial 59. As a result, the amount of pressure reduction at the valve body 61 increases, and the pressure applied to the main valve 50 decreases, so that the lever can be operated lightly in the range of the gap G. Therefore, not only can the flow rate be accurately reduced, but also the impact can be reduced by reducing the contact pressure of the main valve 50 against the valve seat 52 when the valve is closed. After refueling is completed, the start switch 14a is turned off (FIG. 5).
Step e) Stop the pump motor 13 (FIG. 5)
Step f).

Even when the high-pressure pump 11 is stopped, the flow path from the check valve 10 to the valve body 61 maintains the hydraulic pressure at the time of operation of the pump. To accommodate. Thus, even if the hose 20 is long and a large amount of oil is stored in the hose 20, it is possible to prevent the oil in the hose from returning due to the expansion of air bubbles and to supply an accurate amount of oil at the next oil supply. can do.

Next, when the take-up switch 14b is turned on to store the hose 20 (step (a) in FIG. 6), the control device 16 checks whether the start switch 14a is turned off. It waits for the start switch 14a to be turned off without executing the take operation (step b in FIG. 6). This prevents the nozzle 22 from coming off the tank by winding up the hose 20 during refueling.

On the other hand, if the start switch 14a is already off (Step B in FIG. 6), the reel motor 21 is operated (Step C in FIG. 6) and the hose 20 is turned off.
On the reel 4 and waits until the winding switch 14b is turned off (step d in FIG. 6).

When the pressure of the oil in the hose 20 decreases due to a long-time stop of the high-pressure pump 11, the oil bubbles contained therein expand, and a part of the bubbles is reduced to the top space 45 of the flow meter 12. As described above, since the small valve 15 is opened for a certain period of time at the start of refueling (step b in FIG. 5) and discharged to the tank 2, measurement errors due to bubbles are prevented. At this time, since the stop valve 25 on the discharge side of the flow meter 12 is closed, the pressure in the hose 20 does not decrease.

In the above embodiment, the case where the oil supply device is applied to a vehicle mounted on a vehicle has been described. However, it is apparent that the same effect can be obtained by using the oil supply device installed on the ground. is there.

[0029]

As described above, according to the present invention, in the refueling nozzle which receives the liquid from the refueling hose at the inflow port and discharges it from the nozzle cylinder tip via the main valve which is opened and closed by the refueling lever, A pressure reducing valve having a valve body whose discharge pressure is adjusted by a pressure setting spring and a diaphragm is provided between the inlet and the main valve, and the set pressure of the pressure reducing valve is changed in conjunction with the movement of the oil supply lever, and the lever is moved. Since the discharge pressure is low in the valve closed state and the throttled position,
Even during refueling, the oil in the hose can be pressurized to the extent that the bubbles are crushed, which not only reduces the error of the volume flow meter due to the bubbles, but also reduces the degree of pressure reduction by the pressure reducing means according to the lever position. It can be switched automatically, light load at lever operation and small flow rate,
In addition, a required flow rate can be secured at the time of refueling.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of an oil supply device using an oil supply nozzle of the present invention.

FIG. 2 is a diagram showing a configuration of an oil supply device using the oil supply nozzle of the present invention.

FIG. 3 is a cross-sectional view showing one embodiment of a positive displacement flowmeter used in the same device.

FIG. 4 is a cross-sectional view showing one embodiment of a fueling nozzle of the present invention.

FIG. 5 is a flowchart showing a refueling operation of the same device.

FIG. 6 is a flowchart showing a hose winding operation of the same device.

[Explanation of symbols]

 Reference Signs List 20 refueling hose 22 refueling nozzle 23 pressure reducing valve 50 main valve 53 refueling lever 54 pressure adjustment chamber 55 outflow port 56 cylinder tip 57 inflow port 60 pressure adjustment spring 61 valve body 64 diaphragm 65 connecting rod 66 operating rod

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B67D 5/37 B67D 5/04

Claims (4)

(57) [Claims] 1. A refueling nozzle for receiving a liquid from a refueling hose at an inflow port and discharging the liquid from a nozzle cylinder tip through a main valve opened and closed by a refueling lever, wherein a pressure is set between the inflow port and the main valve. A pressure reducing valve having a valve body whose discharge pressure is adjusted by a spring for use and a diaphragm is provided, and the set pressure of the pressure reducing valve is changed in conjunction with the movement of the oil supply lever, and the lever is closed or throttled. An oil supply nozzle for an oil supply device configured to reduce the discharge pressure at a position. 2. The diaphragm is provided with a spring for biasing the valve body in a direction to open the valve body, and the spring is operated via an operating rod having a gap between the diaphragm and the oil supply lever. Item 2. An oil supply nozzle for an oil supply device according to Item 1. 3. The oil supply nozzle for an oil supply device according to claim 2, wherein the gap has a size capable of controlling a small flow rate. 4. The oil supply nozzle for an oil supply device according to claim 2, wherein the main valve, the operating rod, the diaphragm, the valve body, and the pressure setting spring are arranged on substantially the same straight line.