JPS6317720B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refueling device that includes an on-off valve provided in the middle of a refueling pipe and that opens and closes the on-off valve to supply oil from a nozzle.

[Prior Art] As is well known, in a refueling system, refueling is performed by opening and closing a main valve by operating a lever, for example.
For example, Japanese Utility Model Application Publication No. 48-40105 discloses a technique in which when a nozzle is inserted into a refueling port, a solenoid valve provided in the middle of the refueling pipe opens, allowing refueling. However, when refueling, it is preferable to refuel in small amounts when the tank is close to "full" or close to the predetermined refueling amount.On the other hand, during normal refueling work, it is better to refuel as much oil as possible over the refueling time. is preferable because it shortens.

Normally, the nozzle of a refueling system includes a main valve and a check valve, and the main valve is opened and closed by operating a lever, and when the main valve closes and the pressure disappears, the check valve closes.

However, in such conventional nozzles, hydraulic pressure is confined within the oil supply pipe or hose by opening and closing the main valve, which causes measurement errors and requires that the oil supply pipe or hose be made durable. Moreover, incorporating an oil amount control valve into the nozzle increases the weight of the nozzle, impairing its operability.

For example, Japanese Patent Application Laid-open No. 52-89813 discloses a lubricating device by the present applicant, in which a check valve is provided in the nozzle, and when the internal pressure in the nozzle increases when the main valve is closed, the check valve It relieves pressure and removes stress from the hose, thereby preventing damage to the hose and measurement errors.

However, in such known technology, the check valve that is opened and closed by an operating lever is only opened and closed, and the degree of opening cannot be adjusted. This is because even if an attempt is made to adjust the opening with the operating lever, the check valve opens and closes due to the spring force and the pressure difference between the upstream and downstream sides of the valve, making it impossible to adjust the desired flow rate. For this reason, in order to control the discharge amount from the nozzle, a valve has conventionally been used which is relatively heavy, whose opening degree can be adjusted by an operating lever, and which is closed by a signal from a liquid level sensor.

[Object of the Invention] Therefore, an object of the present invention is to reduce the weight of the nozzle and improve operability, and to avoid measurement errors even when relatively flexible oil supply pipes and hoses are used. We are here to provide you with a reliable refueling device.

[Structure of the Invention] The refueling device according to the present invention includes an on-off valve provided in the middle of a refueling pipe, a nozzle having a valve closed by a spring or the like when the pressure of the hose becomes low, and a nozzle at the end of the hose, and a valve opening degree set in the nozzle. The valve control device is provided with an operator for controlling the operating element, and a detecting means for detecting the operating state of the operating element, and for controlling the opening degree of the on-off valve in accordance with the output of the detecting means.

[Operations and Effects of the Invention] Therefore, during refueling work, by operating the operator provided on the nozzle, the operating state is detected by the detection means, and the operation is performed in the refueling pipe according to the output from the detection means. The opening degree of the opening/closing valve is controlled by providing the opening/closing valve. As a result, when the tank is nearly full, the flow rate can be reduced to ensure sufficient refueling without overflowing.
In addition, when the on-off valve is fully closed, even if the pressure on the downstream side rises, if the pressure in the piping decreases, the valve will open due to a spring, etc., and the hose downstream of the on-off valve will be filled with pressure oil due to the shutoff of the on-off valve. Since this does not work, it is possible to use a relatively weak and therefore flexible material, which improves operability. Furthermore, the nozzle does not need to be provided with a main valve, and only needs to have a built-in valve, such as a check valve, which closes when the pressure of the hose becomes low, so the weight of the main valve is reduced and a nozzle that is easy to handle can be obtained.

[Preferred Embodiment] When implementing the present invention, it is preferable to provide the on-off valve as close to the flow meter as possible. Therefore, for example, it is preferable to provide an on-off valve at the connection between the oil supply pipe and the hose.

Further, the on-off valve provided in the oil supply pipe is preferably controlled electrically by an operator provided near the nozzle, but it may also be remotely controlled hydraulically. Preferably, the opening degree of the on-off valve is set by the position of the operator. By doing so, the refueling operation becomes easier.

A check valve is installed in the nozzle to prevent oil from flowing out when refueling is stopped, and the cylinder side of this check valve is designed so that oil pressure on the oil supply side, and thus approximately atmospheric pressure, acts on the cylinder side during refueling.
Preferably, the oil pressure on the oil supply side is applied when no oil is being supplied.

In the present invention, as described above, if the nozzle is provided with a valve that is closed by a spring or the like when the pressure in the piping becomes low, and the opening degree of the on-off valve is controlled by the operator, the valve that is closed by the spring or the like is opened by the pressure in the piping. It is preferable to configure the valve to be closed by a spring or the like to open in conjunction with the operation of the operator because the operation of the valve to be closed by a spring becomes more reliable.

[Example] An example of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a pump motor 1, a flow meter 2, a display meter 3, a nozzle switch 4, etc. are provided in a case A of the oil supply system, as in the conventional technology.
Since these are all well known, their explanations will be omitted.

According to the present invention, an on-off valve 8 is provided in the oil supply pipe 5.
is provided. Also, as is well known, the hose 5a
When the nozzle 6 connected to the tip of the nozzle is removed from the nozzle hook 7, the nozzle switch 4 is turned on, the pump motor 1 is activated, and oil can be supplied.

The on-off valve 8 is provided with detection means so that its opening degree can be selected in multiple stages, and in the illustrated example, there are three detection means.
For example, switch S shown in Figure 4 can be selected in stages.
1 is turned on, the on-off valve 8 is fully opened by the valve control device 9, opened halfway when the switch S2 is turned on, and opened slightly when the switch S3 is turned on. That is, in the illustrated example, a switch is used as the detection means.

An operator for an on-off valve 8 is provided near the nozzle 6, as well as a valve that is closed by a spring or the like when the pressure in the pipe becomes low, that is, a check valve in the illustrated example. As shown in FIG. 2 or 3, the operator generally comprises a lever 10, and the aforementioned switches S1, S2, and S3 are operated in conjunction with this lever 10. The base of the lever 10 has a spherical or cylindrical shape, and approximately in the center thereof there is a pore 11 extending diametrically.
is formed, and some are expanded into fan shapes. The cylindrical body constitutes a switching valve. Also lever 10
is always pressed to the non-operating position by a spring 13.

The check valve 20 includes a valve body 21 that contacts a valve seat 22 on the oil supply side, a coil spring 23 that constantly presses the valve body against the valve seat, and a stem 24 that connects the valve body 21 and the piston 25. and cylinder 2
It consists of 6. As shown in FIG.
It is adapted to act via the pore 11 and the passage 27 of the switching valve 12. When the lever 10 is in the operating position, the cylinder 26 communicates with the oil supply side D through the passage 27 and the pore 11 of the switching valve 12, as shown in FIG. There is.

In operation, first, the nozzle 6 is removed from the nozzle hook 7, the nozzle switch 4 is turned on, the pump motor 1 is started, and the pump is set in a state in which oil can be supplied. Then, the refueling staff brings the nozzle 6 to a predetermined position and slightly rotates the lever 10 in the direction of arrow E (FIG. 2). Then switch S3 turns on,
The valve control device 9 opens the on-off valve 8 slightly, and refueling is started in a small amount. In this case, since the cylinder 26 communicates with the oil supply side D via the passage 27 and the pore 11, no pressure acts inside the cylinder, and therefore the supplied oil easily flows through the valve body 21. The oil is pushed open against the coil spring and flows to the oil supply side.

Next, when the lever 10 is further rotated, the switch S2 is turned on, and the on-off valve 8 is opened halfway, and when the switch S3 is turned on, it is fully opened, allowing oil to be supplied at a desired flow rate. Furthermore, when refueling is stopped, the lever 10 is pushed by the spring 13 and returns to the non-operating position, so that the on-off valve 8 is also closed. At this time, even if the oil pressure between the on-off valve 8 and the check valve 20 increases due to high temperatures in the summer, this oil pressure acts on the cylinder 26 of the check valve as shown in FIG. There is no danger of the body 21 being forced open.

[Summary] As described above, according to the present invention, since the output from the detection means provided on the nozzle is applied to the valve control device of the on-off valve, the opening degree of the on-off valve can be determined by the operator provided on the nozzle. As a result, the optimal amount of oil can be supplied depending on the oil supply state.
Therefore, it is easy to operate.

Furthermore, since no hydraulic pressure is generated in the hose downstream of the on-off valve, a flexible and relatively weak hose can be used, improving operability. Furthermore, the hose on the downstream side of the on-off valve does not swell due to pressure oil, and measurement errors do not occur. Moreover, since there is no need to provide a main valve in the nozzle, the weight of the nozzle itself can be reduced.

Furthermore, if the operator, that is, the lever, and the check valve are configured in association with each other as in the embodiment, even if the oil pressure on the oil supply side increases when refueling is stopped, there is no risk of oil leaking from the check valve. There is no need to ignite and cause a fire.

[Brief explanation of the drawing]

Fig. 1 is an overall front view schematically showing a refueling device according to the present invention, Figs. 2 and 3 are sectional views showing the main parts thereof, Fig. 2 is a state in which no refueling is performed, and Fig. 3 is a diagram showing a state in which the refueling device is not refueled. FIG. 4, which shows the state during refueling, is a circuit diagram implemented in the present invention. 5... Oil supply pipe or hose, 6... Nozzle,
8...Opening/closing valve, 10...Operator (lever), 12
...Switching valve, 20...Check valve, 25...Piston, 26...Cylinder.

Claims (1)

[Claims] 1 An on-off valve is provided in the middle of the oil supply pipe, a nozzle having a valve that closes with a spring or the like when the pressure of the hose becomes low is provided at the tip of the hose, and an operator for setting the opening degree of the on-off valve on the nozzle; 1. A refueling device comprising: a detection means for detecting an operating state of an operator; and a valve control device that controls the opening degree of the on-off valve in accordance with the output of the detection means.