JP5950372B1 - Lubrication device - Google Patents

Abstract

Provided is a safe oil supply device that recovers fuel oil and vapor without touching outside air while reducing the pressure applied to devices and members in a housing. A joint pipe 11 and an electromagnetic valve 12 are provided on the suction side (tank lorry 2 side), and on the discharge side of the oil supply pump 101, apart from the fuel supply path A to the oil supply nozzle 14, the pressure reducing means 15 and the return pipe 16 are reversed. A return flow path B that includes the stop valve 17 and returns to the joint pipe 11 is formed. [Selection] Figure 2

Description

The present invention relates to a fuel supply device that can supply fuel oil mounted on a tank truck to a supply body such as a vehicle via an unloading hose connected to a discharge port of the tank truck.

In recent years, fuel oil such as gasoline may become extremely short due to earthquakes or typhoons. In recent years, the number of gas stations has been remarkably reduced, so it is not uncommon to have to travel more than 100 km in both directions to get gasoline. If it becomes possible to supply fuel directly from a tank truck in such an emergency or in a depopulated area, supply a large amount of fuel oil at a time and supply the required amount of fuel oil when needed. It becomes possible to do.

However, the safety of the fueling device in a general gas station that supplies fuel oil stored in an underground tank or the like to a vehicle is also considered, and a fueling device that performs refueling work in a place where safety facilities are not in place If so, further safety is required.

In general, as a method of supplying fuel oil at a place other than a predetermined facility such as a fueling station, there is a method of supplying oil directly from a drum can as shown in Patent Document 1. However, transporting drums is risky, and there are many opportunities to come in contact with air other than during refueling.

Moreover, a mobile oiling device as shown in FIG. 1 of Patent Document 2 is known. This mobile refueling device can be refueled directly from a fuel tank placed on the loading platform of a truck. However, in such a mobile refueling device, direct refueling of gasoline is prohibited.

Therefore, as shown in FIG. 1, the applicant of the present application inputs an unloading hose connected to a discharge port of a tank truck so that fuel oil such as gasoline can be supplied in a place other than an environment where safety facilities are provided. And an oil supply device having a configuration in which the oil supply nozzle is the output side. That is, the fuel oil mounted on the tank truck can be directly supplied to the vehicle or the like from the fuel supply nozzle by operating the nozzle lever.

JP2013-23261A JP-A-62-135192

Since the pressure on the discharge side of the oil pump is higher than that on the suction side, there is no problem if the increased pressure can be released efficiently by the operation of the nozzle lever, but the operation of the nozzle lever is constant for all users. There is a user who does not always operate at a speed but also performs an abrupt operation. In addition, when a certain amount of oil is reached, the oil supply may be interrupted suddenly by a mechanism that automatically stops the oil supply. Such unusual operations and mechanisms increase the pressure on the equipment and members in the fueling device, and thus cause failure due to damage of the packing, leakage of fuel oil and vapor, and the like.

In a refueling device installed at a filling station, it is possible to easily depressurize equipment and members in the refueling device by simply returning the fuel oil that has not been released from the refueling nozzle to the underground fuel tank of the filling station. In an environment where the tank is directly connected to the tank lorry, if the increased pressure is directly released to the outside air, there is a risk that even fuel oil and vapor leak to the outside. Further, when the fuel oil is returned to the fuel tank of the tank truck, it is necessary to open the upper cover of the hatch, and there is a problem that even the fuel oil mounted on the tank truck touches the outside air. Furthermore, there is a method of collecting the fuel oil in a container such as a pail can, but there is also a problem that the fuel oil touches the outside air.

Therefore, the present invention has been made in view of the problems that occur in an environment in which a fueling device is directly connected to a tank truck, and fuel oil and vapor are reduced while reducing the pressure that has been applied to the devices and members in the housing. It aims at collecting without touching the outside air, and provides a safe oiling device.

An oil supply device according to claim 1 is an oil supply device for directly supplying fuel oil mounted on a tank truck to a supplied body, wherein an oil supply nozzle that discharges fuel oil to the supplied body; A fuel feed path communicated with a fuel feed nozzle, a fuel feed pump that discharges fuel oil toward the fuel feed path, a joint pipe connected between a suction side of the fuel feed pump and the tank truck, A branch formed from the fuel feed path, or formed separately from the fuel feed path on the discharge side of the fuel pump, and a part of the fuel oil discharged from the fuel pump is returned to the joint pipe. A flow path and an electromagnetic valve provided between the joint pipe and the oil supply pump are provided .

An oil supply device according to claim 2 is an oil supply device for directly supplying fuel oil mounted on a tank truck to a supplied body, wherein an oil supply nozzle that discharges fuel oil to the supplied body; A fuel feed path communicated with a fuel feed nozzle, a fuel feed pump that discharges fuel oil toward the fuel feed path, a joint pipe connected between a suction side of the fuel feed pump and the tank truck, A branch formed from the fuel feed path, or formed separately from the fuel feed path on the discharge side of the fuel pump, and a part of the fuel oil discharged from the fuel pump is returned to the joint pipe. A flow path, a nozzle switch that detects whether the oil supply nozzle is overloaded, and provided between the joint pipe and the oil supply pump, and in conjunction with the on / off of the nozzle switch, A solenoid valve which controls the opening and closing of the flow of fuel oil to et the oil supply pump side, characterized by comprising a.

According to a third aspect of the present invention, there is provided a fueling apparatus capable of supplying fuel oil mounted on the tank lorry to a supplied body via an unloading hose connected to a discharge port of the tank lorry. An oil supply nozzle that is inserted into a fuel supply port of the supplied body and discharges fuel oil to the supplied body; a nozzle hook that fixes the fuel supply nozzle; and a nozzle hook that is provided on the nozzle hook; A nozzle switch that operates in conjunction with the unloading, a fuel liquid supply path that communicates with the fuel supply nozzle, and an oil switch that operates in conjunction with the on / off state of the nozzle switch and discharges fuel oil to the fuel liquid supply path An oil pump, a first connecting portion, a second connecting portion, and a third connecting portion, wherein the first connecting portion is connected to the unloading hose, and one end portion is connected to the second connecting portion. Connection The other end is connected to the suction side of the fuel pump, and the flow of fuel oil from the joint pipe side to the suction side of the fuel pump is controlled to open and close in conjunction with the on / off of the nozzle switch. And one end of the solenoid valve that is branched from the fuel feed path, or connected to a discharge side of the fuel pump and a position different from the position where the fuel feed path is connected. A return flow path formed by connecting the other end portion to the third connection portion and returning a part of the fuel oil discharged from the fuel supply pump to the joint pipe. To do.

According to a fourth aspect of the present invention, there is provided a fueling device capable of supplying fuel oil mounted on the tank lorry to a supplied body via an unloading hose connected to a discharge port of the tank lorry. An oil supply nozzle that is inserted into a fuel supply port of the supplied body and discharges fuel oil to the supplied body; a nozzle hook that fixes the fuel supply nozzle; and a nozzle hook that is provided on the nozzle hook; A nozzle switch that operates in conjunction with detachment, a fuel feed path that communicates with the refueling nozzle, operates in conjunction with turning on and off the nozzle switch, and is discharged from the pump body and the pump body. A separator that removes the gas contained in the fuel oil, and a fuel pump that discharges the fuel oil from which the gas has been removed by the separator to the fuel feed path; A joint pipe having one connection part, a second connection part and a third connection part, wherein the first connection part is connected to the unloading hose, one end part being connected to the second connection part, and the other end part; Is connected to the suction side of the fuel pump, and in conjunction with the on / off of the nozzle switch, an electromagnetic valve that controls the opening and closing of the flow of fuel oil from the joint pipe side to the suction side of the fuel pump; One end portion is formed by connecting to the discharge side of the fuel pump and a position different from the position where the fuel feed path is connected, and the other end portion is connected to the third connection portion. And a return flow path for returning a fluid other than the fuel oil from which gas has been removed by the separator to the joint pipe.

The oil supply device according to claim 5 is the oil supply device according to any one of claims 1 to 4 , wherein the return flow path has a predetermined differential pressure between the pressure on the upstream side and the pressure on the downstream side. When it occurs, it has a pressure reducing means for opening the valve to reduce the internal pressure on the upstream side, and a return pipe connected to the downstream side of the pressure reducing means.

The oil supply device according to claim 6 is the oil supply device according to claim 5 , wherein the return flow path further allows a flow of fuel oil from the pressure reducing means side to the joint pipe side, and A check valve for preventing flow from the joint pipe side to the pressure reducing means side is provided.

The oil supply device according to claim 7 is the oil supply device according to any one of claims 1 to 6 , wherein a tip portion of the return flow path on a side connected to the joint pipe is in the joint pipe. The suction side of the fuel pump is open, and the tank lorry side is not open.

An oil supply device according to an eighth aspect is the oil supply device according to any one of the first to sixth aspects, wherein a distal end portion of the return flow channel on a side connected to the joint pipe is in the joint pipe. The oil pump is bent toward the suction side.

An oil supply device according to a ninth aspect is the oil supply device according to any one of the first to eighth aspects, wherein a distal end portion of the return flow channel on a side connected to the joint pipe is formed in a tapered shape. It is characterized by that.

A fueling device according to a tenth aspect is the fueling device according to any one of the fifth to ninth aspects, wherein the pressure reducing means is a pressure relief valve.

In this fueling device, a T-shaped joint pipe is provided between the tank truck and the suction side of the fueling pump, and the fuel oil pumped from the fueling pump is branched from the fuel feeding path through which the fuel oil flows to the fueling nozzle, or A part of the fuel oil discharged from the oil pump is sent to the joint pipe at an arbitrary position on the discharge side of the oil pump separately from the fuel feed path where the fuel oil pumped from the oil pump flows to the fuel nozzle. A return flow path for returning is formed.

With this return flow path, the internal pressure increased in the fuel feed path can be released to the joint pipe having a low pressure, and at the same time, the fuel oil and vapor can be recovered without touching the outside air. Here, the fuel feed path is a path through which fuel oil flows from the discharge side of the fuel pump to the fuel nozzle, and includes devices and members such as a flow meter, a fuel hose, and packing.

The return flow path is provided between the return pipe through which the fuel oil flows, the discharge side of the oil pump and the return pipe, and the pressure on the upstream side (discharge side of the oil pump) and the downstream side (joint pipe side). And pressure reducing means for reducing the internal pressure on the upstream side by opening when a predetermined differential pressure is generated between the pressure and the fuel pressure, thereby preventing fuel oil from flowing back into the flow path more than necessary. However, it is possible to reduce the internal pressure that has increased in the fuel feed path.

A pressure relief valve or a pressure control valve can be used as the pressure reducing means. In the case of a pressure relief valve, the valve is opened only when a predetermined differential pressure is generated between the upstream pressure and the downstream pressure, and the internal pressure increased in the fuel feed path is released to the return pipe to the upstream side. It is possible to reduce the internal pressure increased in the fuel feeding path by releasing the pressure to the downstream side. Similarly, in the case of a pressure control valve such as a relief valve or a pressure reducing valve, it is possible to release the internal pressure increased in the fuel liquid supply path to the return pipe and reduce the internal pressure increased in the fuel liquid supply path. Which of these is used depends on the installation position. Depending on the position, there may be only gas or there may be a large amount of liquid (fuel oil), so an optimal valve may be selected depending on the position to be installed.

The return flow path is further provided with a check valve that allows the flow of fuel oil from the pressure relief valve side to the joint pipe side and prevents the flow from the joint pipe side to the pressure relief valve side. While preventing the fuel oil discharged from the discharge port from being sucked into the return pipe, the fuel oil flowing in the return pipe (a part of the fuel oil pumped from the oil pump) is returned to the joint pipe side and reused. be able to.

Here, the structure of a general oil supply pump will be described. The oil supply pump includes a pump body, a separator, a float chamber, and the like. Among these, the pump body pumps up and discharges fuel oil while rotating a wheel by driving a motor. At this time, since the fuel oil is pumped up and discharged while enclosing the surrounding gas, the gas is mixed into the discharged fuel oil. Therefore, the gas mixed in the fuel oil is removed by the separator, and is separated into the fuel oil from which the gas has been removed, the removed gas, and the fuel oil from which the gas could not be removed.

According to a fourth aspect of the present invention, there is provided a fuel supply apparatus configured to send fuel oil from which gas has been removed by a separator to a fuel feed path, and to send a fluid other than fuel oil from which gas has been removed to a return flow path. ing. The fluid substance sent to the return flow path here refers to both or one of the removed gas and the fuel oil from which the gas could not be removed. For example, both the gas and the fuel oil that could not remove the gas can be sent to the return flow path and returned to the oil supply pump again. In this case, since it is not necessary to provide a float chamber, the oil supply pump can be downsized, and the oil supply device can also be downsized. It is also possible to provide a float chamber and send the fuel oil that could not remove the gas to the return channel. Furthermore, there is an advantage that only the vapor can be recovered by releasing the gas from the float chamber to the return channel without releasing it to the atmosphere. In this case, the upstream side of the decompression means is the discharge side of the pump body.

The tip of the return flow path on the side connected to the joint pipe is open on the suction side of the oil pump (second connection part side of the joint pipe) in the joint pipe, and the tank lorry side (first connection part side of the joint pipe) ) Can be discharged in the same direction as the flow direction of the fuel oil discharged from the discharge port of the tank lorry, and the back flow of the fuel oil to the return flow path is prevented. It becomes possible.

Further, the tip of the return flow path on the side connected to the joint pipe is formed so as to be bent in the joint pipe so as to be guided toward the suction side of the oil pump (second connection section side of the joint pipe). For example, the fuel oil discharged from the discharge port of the tank lorry can be discharged in the same direction as the direction in which the fuel oil flows, and the backflow of the fuel oil to the return flow path can be prevented.

At that time, if the tip of the return flow path on the side connected to the joint pipe is tapered, it is possible to reduce the obstruction of the flow of fuel oil flowing from the tank truck to the suction side of the fuel pump. In addition, it is possible to prevent the fuel oil generated by the wraparound of the fuel oil from flowing into the return flow path.

It is the schematic which shows the oil supply apparatus which concerns on this invention. It is a lineblock diagram showing the oil supply device concerning the present invention. It is a lineblock diagram showing the oil supply device concerning the present invention. It is a lineblock diagram showing the oil supply device concerning the present invention. It is a lineblock diagram showing the oil supply device concerning the present invention. It is sectional drawing which shows the front-end | tip of the return flow path in a joint pipe | tube.

The best mode for carrying out the present invention will be described with reference to the drawings.

As shown in FIG. 1, the fuel supply device 1 can supply fuel oil such as gasoline mounted on the tank truck 2 to the supplied body 4 via an unloading hose 3 connected to the discharge port 2 a of the tank truck 2. It is a thing. Here, the to-be-supplied body includes an aircraft such as a helicopter and a fuel container such as a drum can in addition to a vehicle such as an automobile or a motorcycle.

As shown in FIG. 2, the oil supply device 1 includes a joint pipe 11, an electromagnetic valve 12, an oil supply pump 101, from an upstream side (tank lorry 2 side) where fuel oil flows toward a downstream side (supplied body 4 side). The flow meter 102, the flow control valve 103, the oil supply hose 13, and the oil supply nozzle 14 are configured in this order. Among these, the oil supply pump 101, the flow meter 102, and the flow control valve 103 are accommodated in a housing 10 formed of a hermetically sealed casing combined with a metal panel.

Further, the fuel supply device 1 flows from the discharge side of the fuel pump 101 to the fuel nozzle 14 through the flow meter 102, the flow control valve 103 and the fuel hose 13 in the fuel oil flow path having the above-described configuration. Separately from the fuel feed path A, a return flow path B for returning a part of the fuel oil pumped from the oil feed pump 101 to the joint pipe 11 is formed. In addition, as shown in FIG. 3, the return flow path B may be formed by branching from the fuel feed path A.

In the fueling device 1, a fueling hose 13 extends from the housing 10, a fueling nozzle 14 is provided at the tip of the fueling hose 13, and fuel oil can be discharged from the fueling nozzle 14. Further, the refueling nozzle 14 is provided with a nozzle lever 14 a that adjusts the flow rate of the fuel oil discharged from the refueling nozzle 14 by gripping the user's hand.

The housing 10 is provided with a nozzle hook 105 for fixing the fueling nozzle 14, and the nozzle hook 105 is provided with a nozzle switch 106 for detecting whether the fueling nozzle 14 is detached. The nozzle switch 106 is turned off when the fuel nozzle 14 is hooked on the nozzle hook 105 (stored state), and is switched off when the fuel nozzle 14 is removed from the nozzle hook 105 (not stored). Turn on.

Further, the housing 10 is provided with a control device 104 for controlling the fuel supply device 1, and controls starting and stopping of the solenoid valve 12, the fuel pump 101 and the like in conjunction with the on / off of the nozzle switch 106. Yes. In addition, the power supply used for the fuel supply apparatus 1 can use any power supply of 12V and 24V used for a motor vehicle, and household 100V.

The joint pipe 11 is formed in a T shape, and has a first connection part 11a, a second connection part 11b, and a third connection part 11c. The first connection part 11a and the second connection part 11b are connected to the tank lorry 2. It arrange | positions in the position which opposes so that the fuel oil discharged from the discharge outlet 2a may flow linearly. The first connecting portion 11a is connected to the unloading hose 3 through the base 5, the second connecting portion 11b is connected to the electromagnetic valve 12, and the third connecting portion 11c is connected to the return flow path B. In addition, if the 1st connection part 11a is formed so that it can connect directly to the unloading hose 3, it is not necessary to connect via the nozzle | cap | die 5. Further, the joint pipe 11 does not have to be formed in a T shape, and may be formed so that the return flow path B is connected between the discharge port 2 a of the tank truck 2 and the electromagnetic valve 12.

The solenoid valve 12 is provided between the joint pipe 11 and the oil supply pump 101, and controls the opening and closing of the flow of fuel oil from the joint pipe 11 side to the oil supply pump 101 side in conjunction with the on / off of the nozzle switch 106. . Specifically, the valve is opened with the fuel nozzle 14 removed from the nozzle hook 105 (on state) to allow the flow of fuel oil, and the fuel nozzle 14 is hooked on the nozzle hook 105 (off state). In the state) to prevent the flow of fuel oil.

Such a solenoid valve 12 is not provided in a general fueling device installed in a fueling station. This is because fuel oil discharged from the discharge port 2a of the tank truck 2 may flow into the fuel pump 101 even when the fuel pump 101 is not operating in an environment where the fuel filler 1 is directly connected to the tank truck 2. Therefore, since it is dangerous, the solenoid valve 12 is provided on the suction side (tank lorry side) of the oil supply pump 101 to ensure safety. By linking the start of the electromagnetic valve 12 with the on / off of the nozzle switch 106, the oil supply device 1 can be used more safely than providing a separate switch. In the present embodiment, the electromagnetic valve 12 is provided outside the housing 10, but may be provided inside the housing 10.

The oil supply pump 101 is connected with the solenoid valve 12 side as the suction side and the flow meter 102 side as the discharge side, and operates in conjunction with the on / off of the nozzle switch 106. Specifically, the oil supply pump 101 starts when the oil supply nozzle 14 is removed from the nozzle hook 105 (on state) and stops when the oil supply nozzle 14 is applied to the nozzle hook 105 (off state). Let

The flow meter 102 measures the flow rate of the fuel oil pumped from the fuel pump 101, performs a predetermined calculation process by the control device 104, and is measured by a flow meter display 1 d provided on the front surface of the housing 10. Display the amount of oil.

The flow rate control valve 103 can adjust the flow rate of the fuel oil steplessly in conjunction with the operation of the nozzle lever 14a with the fuel oil pumped by the oil supply pump 101.

The return path B is configured by connecting the pressure reducing means 15, the return pipe 16, and the check valve 17 in this order from the discharge side of the oil supply pump 101 to the joint pipe 11.

The depressurizing means 15 is for depressurizing the internal pressure that has increased in the fuel feed path A. For example, a pressure relief valve can be used. In the case of a pressure relief valve, the valve is opened only when a predetermined differential pressure is generated between the upstream pressure and the downstream pressure, and the internal pressure (in the discharge side of the fuel pump 101) increased in the fuel feed path A. It is possible to release the increased pressure) to the return pipe 16 and reduce the internal pressure increased in the fuel feed path. Further, a pressure control valve such as a relief valve or a pressure reducing valve may be used.

The check valve 17 allows the flow of fuel oil from the pressure reducing means 15 side to the joint pipe 11 side, blocks the flow from the joint pipe 11 side to the pressure reducing means 15 side, and reduces the pressure from the joint pipe 11 side to the pressure reducing means 15. Prevents backflow to The position where the check valve 17 is provided may be provided between the return pipe 16 and the joint pipe 11 or may be provided in the middle of the return pipe 16.

In the present invention, the return flow path B is connected to the discharge side of the fuel pump 101 at a position different from the position where the fuel flow path A is connected. Since a differential pressure is generated between the suction side and the discharge side of the oil pump 101, the return flow path B may be provided at an arbitrary position on the discharge side of the oil pump 101. For example, as shown in FIG. 2, it may be provided in the vicinity of the fuel flow path A. Moreover, as shown in FIG. 3, the return flow path B may be formed by branching from the fuel feed path A. Moreover, as shown in FIG. 4, it is also possible to release to the return flow path B without releasing it from the float chamber 101c to the atmosphere. Further, as shown in FIG. 5, it is possible to release the gas and the fuel oil that could not be separated into the return flow path B without providing the float chamber 101 c. As described above, when the return flow path B is provided on the discharge side (float chamber 101c or separator 101b) of the pump main body of the fuel supply pump, the internal pressure of the fuel feed path A communicating with the return flow path B can be reduced. It becomes.

The return channel B is connected to the third connection part 11c of the joint pipe 11 on the side where the return flow path B is connected to the joint pipe 11, and may be discharged from the opening part so as to flow vertically downward. In order to discharge fuel oil smoothly while preventing backflow of the fuel oil, the tip structure may be devised as shown in FIG.

For example, as shown in FIG. 6a, the opening at the tip on the side where the return flow path B is connected to the joint pipe 11 is open on the second connecting portion 11b side (the electromagnetic valve 12 side), and the first connecting portion 11a. You may form a notch so that the side (unloading hose 3 side) may not open. Thus, by providing an opening only in one direction, the fuel oil discharged from the discharge port 2a of the tank lorry 2 is discharged from the return flow path B in the same direction as the direction in which the fuel oil flows to the solenoid valve 12 side. It is possible to prevent the fuel oil flowing toward the solenoid valve 12 from flowing into the return flow path B.

Also, as shown in FIG. 6b, if the return flow path B is formed with a tapered tip on the side connected to the joint pipe 11, the flow of fuel oil flowing from the unloading hose 3 to the solenoid valve 12 is hindered. In addition, it is possible to prevent the fuel oil from flowing into the return flow path B, which is generated by the wraparound caused by the collision of the fuel oil with the tip of the return flow path B.

Moreover, as shown in FIG. 6c, the return flow path B can be formed by bending the tip end on the side connected to the joint pipe 11 toward the second connection part 11b.

Further, as shown in FIG. 6d, the distal end portion of the return flow path B connected to the joint pipe 11 is bent toward the second connection portion 11b side, and further cut in an oblique direction either up or down. Thus, a notch can be provided.

Further, as shown in FIG. 6e, the tip of the return flow path B on the side connected to the joint pipe 11 can be bent toward the second connection portion 11b to further form a taper shape.

In addition, when this fueling device 1 is used in a fuel-depleted area, it is necessary to periodically perform a fueling operation. Therefore, the tanker 2 and the truck on which the fueling device 1 is mounted do not move each time. For example, the refueling device 1 can be permanently installed in a refueling station that is no longer in business. By doing so, there is a space where the tank truck 2 can be parked, and environmental considerations have already been taken into account, so that the fuel supply device 1 can be used more safely.

In an emergency or in a fuel-depleted area, the tank truck 2 may not be parked at a predetermined fueling place (place where the fueling device 1 is installed). Further, when refueling an aircraft such as a helicopter with this refueling device 1, the tank truck 2 cannot be brought close to the aircraft. In such a case, the oil supply device 1 can be used by connecting an extension hose or the like to the unloading hose 3.

DESCRIPTION OF SYMBOLS 1 Oil supply apparatus 2 Tank truck 3 Unloading hose 4 Supply object 10 Housing 11 Joint pipe 12 Solenoid valve 13 Oil supply hose 14 Oil supply nozzle 14a Nozzle lever 15 Decompression means 16 Return pipe 17 Check valve 101 Oil supply pump 102 Flowmeter 103 Flow control valve 105 Nozzle bracket 106 Nozzle switch A Fuel flow path B Return path

Claims (10)

A fueling device for directly supplying fuel oil mounted on a tank truck to a supplied body,
A refueling nozzle that discharges fuel oil to the supplied body;
A fuel feed path communicating with the fuel nozzle;
A fuel pump for discharging fuel oil toward the fuel feed path;
A joint pipe connected between the suction side of the oil pump and the tank truck;
It is formed by branching from the fuel feed path, or formed separately from the fuel feed path on the discharge side of the fuel pump, and returns a part of the fuel oil discharged from the fuel pump to the joint pipe A return channel;
A solenoid valve provided between the joint pipe and the oil pump;
An oil supply device comprising: A fueling device for directly supplying fuel oil mounted on a tank truck to a supplied body,
A refueling nozzle that discharges fuel oil to the supplied body;
A fuel feed path communicating with the fuel nozzle;
A fuel pump for discharging fuel oil toward the fuel feed path;
A joint pipe connected between the suction side of the oil pump and the tank truck;
It is formed by branching from the fuel feed path, or formed separately from the fuel feed path on the discharge side of the fuel pump, and returns a part of the fuel oil discharged from the fuel pump to the joint pipe A return channel;
A nozzle switch for detecting unloading of the fueling nozzle;
An electromagnetic valve that is provided between the joint pipe and the oil supply pump, and controls the opening and closing of the flow of fuel oil from the joint pipe side to the oil supply pump side in conjunction with the on / off of the nozzle switch;
An oil supply device comprising: In the fueling device that enables the fuel oil mounted on the tank truck to be supplied to the supplied body via the unloading hose connected to the discharge port of the tank truck,
The fueling device is:
A refueling nozzle that is inserted into a fuel supply port of the supplied body and discharges fuel oil to the supplied body;
A nozzle hook for fixing the oil supply nozzle;
A nozzle switch that is provided on the nozzle hook and operates in conjunction with the hooking of the oiling nozzle;
A fuel feed path communicating with the fuel nozzle;
An oil supply pump that operates in conjunction with turning on and off the nozzle switch, and that discharges fuel oil to the fuel feed path;
A joint pipe having a first connection part, a second connection part and a third connection part, wherein the first connection part is connected to the unloading hose;
One end portion is connected to the second connection portion, the other end portion is connected to the suction side of the oil pump, and the suction of the oil pump from the joint pipe side is interlocked with the on / off of the nozzle switch. A solenoid valve that controls opening and closing of the flow of fuel oil to the side,
One end is branched and connected from the fuel feed path, or is connected to a discharge side of the fuel pump and a position different from the position where the fuel feed path is connected, and the other end is A return flow path formed by being connected to the third connection portion and returning a part of the fuel oil discharged from the fuel supply pump to the joint pipe;
An oil supply device comprising: In the fueling device that enables the fuel oil mounted on the tank truck to be supplied to the supplied body via the unloading hose connected to the discharge port of the tank truck,
The fueling device is:
A refueling nozzle that is inserted into a fuel supply port of the supplied body and discharges fuel oil to the supplied body;
A nozzle hook for fixing the oil supply nozzle;
A nozzle switch that is provided on the nozzle hook and operates in conjunction with the hooking of the oiling nozzle;
A fuel feed path communicating with the fuel nozzle;
A fuel oil that operates in conjunction with the on / off of the nozzle switch, and has a pump body and a separator that removes gas contained in the fuel oil discharged from the pump body, and the gas is removed by the separator. A fuel pump for discharging the fuel to the fuel feed path;
A joint pipe having a first connection part, a second connection part and a third connection part, wherein the first connection part is connected to the unloading hose;
One end portion is connected to the second connection portion, the other end portion is connected to the suction side of the oil pump, and the suction of the oil pump from the joint pipe side is interlocked with the on / off of the nozzle switch. A solenoid valve that controls opening and closing of the flow of fuel oil to the side,
One end portion is formed by connecting to the discharge side of the fuel pump and a position different from the position where the fuel feed path is connected, and the other end portion is connected to the third connection portion. A return flow path for returning a fluid other than fuel oil from which gas has been removed by the separator to the joint pipe;
An oil supply device comprising: The return flow path is opened when a predetermined differential pressure is generated between the upstream pressure and the downstream pressure, and is connected to the downstream side of the pressure reducing means and the pressure reducing means for reducing the internal pressure on the upstream side. It has a return piping, The oil supply apparatus in any one of Claims 1 thru | or 4 characterized by the above-mentioned. The return flow path is further provided with a check valve that allows fuel oil to flow from the pressure reducing means side to the joint pipe side and prevents flow from the joint pipe side to the pressure reducing means side. The oil supply device according to claim 5 . The tip of the return flow path on the side connected to the joint pipe is open on the suction side of the fuel pump and not open on the tank lorry side in the joint pipe. The oil supply apparatus in any one of 6 . Distal end of the return channel on the side connected to the joint pipe, wherein in said joint pipe, to any one of claims 1 to 6, characterized in that is bent toward the suction side of the oil supply pump Oiling device. The oil supply device according to any one of claims 1 to 8 , wherein a tip portion of the return flow path on the side connected to the joint pipe is formed in a tapered shape. The oil supply device according to any one of claims 5 to 9 , wherein the pressure reducing means is a pressure relief valve.