JP2023166745A - Fueling device with vapor recovery function - Google Patents

Abstract

To recover vapor emitted from a fueling target into an underground tank during fueling, without a need for constructing an underground pipe even when installing a vapor recovery device.SOLUTION: A fueling device 1 with a vapor recovery function comprises: a fueling nozzle 30 that supplies an oil liquid stored in an underground tank 2 to the fueling target; a vent pipe 50 having one end connected to the underground tank 2 and the other end with a vent hole opening at a high position on the ground, which communicates the underground tank 2 with the outside; and a vapor recovery duct 45 which is a duct for recovering the vapor emitted from the fueling target when supplying the oil liquid to the fueling target, having one end opening towards the fueling nozzle 30 side and the other end connected to a ground position of the vent pipe 50.SELECTED DRAWING: Figure 1

Description

The present invention relates to a refueling device with a vapor recovery function.

From the perspective of preserving the atmospheric environment, there is a growing need for vapor recovery equipment that collects the vapor emitted from the tank (refueling target) of a vehicle when a refueling device refuels a tank (refueling target) with oil such as gasoline. A general vapor recovery device, for example, as disclosed in Patent Document 1, is configured to suck vapor discharged during refueling and return it to an underground tank.

Special Publication No. 6-59920

If a new vapor recovery device is installed in a refueling system that does not have a vapor recovery device installed, it is necessary to construct a new pipe to return the vapor to the underground tank, but underground piping Construction required excavation work, which resulted in an increase in construction period and construction cost.

Therefore, even if a vapor recovery device is installed, the present invention has a vapor recovery function that eliminates the need to construct the above-mentioned underground piping and allows vapor discharged from the target to be refueled during refueling to be recovered into an underground tank. Provides a lubricating device with a

The refueling device with a vapor recovery function of the present invention includes a refueling nozzle that supplies oil stored in an underground tank to a refueling target, and a vent that is connected at one end to the underground tank and whose other end opens at a high place above the ground. a vent pipe having an opening and communicating the underground tank with the outside; and a pipe line having one end opening toward the refueling nozzle and collecting vapor discharged from the refueling target when refueling the refueling target. and a vapor recovery pipe whose other end is connected to the above ground position of the ventilation pipe.

According to the present invention, even if a vapor recovery device is installed, there is no need to construct underground piping, and the vapor discharged from the target to be refueled during refueling can be collected into an underground tank.

1 is a diagram showing the overall configuration of a suspended type refueling device with a vapor recovery function according to a first embodiment. FIG. 3 is a diagram showing the overall configuration of a ground-mounted refueling device with a vapor recovery function according to a second embodiment.

Embodiments of the present invention will be described in detail based on the drawings. It goes without saying that, in the following embodiments, the constituent elements are not necessarily essential, except when specifically specified or when it is considered to be clearly essential in principle.

(Example 1)
FIG. 1 is a diagram showing the overall configuration of a suspended type refueling device with a vapor recovery function according to a first embodiment. The refueling device 1 with a vapor recovery function of the first embodiment is installed, for example, at a gas station, a vehicle depot of a transportation company, a refueling station of a car dealer, etc., and pumps up oil stored in an underground tank 2 to supply fuel to vehicles, etc. Supply to the target.

(Refueling device 1 with vapor recovery function)
As shown in FIG. 1, the refueling device 1 with a vapor recovery function is a suspended type refueling device, and includes a pump device 10, a delivery unit 20, a refueling nozzle 30, a vapor recovery device 40, and a vent pipe 50. and.

(Pump equipment 10)
The pump device 10 includes a pump 11 that pumps up and discharges oil stored in an underground tank 2, a motor 12 that drives the pump 11, and a flow meter 14. The oil discharged from the pump 11 is supplied to the delivery unit 20 via the oil supply pipe 13.

(Delivery unit 20)
The delivery unit 20 is installed in a canopy 3 (ceiling) of a gas station. The delivery unit 20 houses a hose reel 22 around which a refueling hose 21 connected to the refueling pipe 13 is wound. One end of the refueling hose 21 is connected to the refueling pipe 13, and the other end is connected to the refueling nozzle 30. The oil supplied from the oil supply pipe 13 is supplied to the oil supply nozzle 30 via the oil supply hose 21.

(Refueling nozzle 30)
The refueling nozzle 30 is suspended from the delivery unit 20, inserted into a refueling port of a refueling target such as a vehicle, and refuels the refueling target. The refueling nozzle 30 includes a vapor suction port 31 that sucks vapor discharged from the refueling target when refueling the refueling target, and a vapor suction tube 32 connected to the vapor suction port 31.

(Vapor recovery device 40)
The vapor recovery device 40 is a device that returns vapor discharged from the refueling target when refueling the refueling target to the gas phase portion of the underground tank 2 . The vapor recovery device 40 is a device installed above ground, and installation of the vapor recovery device 40 does not require construction of underground piping. The vapor recovery device 40 includes a vapor recovery device main body 43 having a suction pump 41 and a motor 42, a check valve 44, and a vapor recovery conduit 45 for supply (hereinafter referred to as vapor recovery conduit 45). .

The vapor recovery device main body 43 is housed within the delivery unit 20. The delivery unit 20 is provided on the canopy 3 (ceiling) and has more space than on the ground. Therefore, even if there is no space on the ground to install the vapor recovery device main body 43, the vapor recovery device main body 43 can be installed inside the delivery unit 20 in the first embodiment. The suction pump 41 is provided in the vapor recovery conduit 45, sucks vapor from the vapor suction tube 32, and discharges the vapor. Motor 42 drives suction pump 41.

The check valve 44 is provided on the secondary side (downstream side) of the suction pump 41, that is, between the suction pump 41 and the apex 45a of the vapor recovery conduit 45. In this embodiment, the check valve 44 is provided in the vapor recovery pipe 45 within the delivery unit 20 in order to facilitate inspection. The check valve 44 prevents vapor from flowing into the suction pump 41 from the ventilation pipe 50 and allows vapor to flow out from the suction pump 41 into the ventilation pipe 50. In this embodiment, the check valve 44 is provided inside the delivery unit 20, so when inspecting the equipment inside the delivery unit 20, the check valve 44 can be easily inspected. Although the arrangement position of the check valve 44 is not limited to this, it may be arranged closer to the apex 45a of the vapor recovery pipe 45, and in this way, the vapor recovery pipe It is possible to reduce the possibility that vapor liquefied in the check valve 45 will accumulate in the upper part of the check valve 44. Note that a filter may be further provided in the vapor flow path, such as in the middle of the vapor recovery pipe 45.

The vapor recovery pipe 45 is connected to the ventilation pipe 50 and supplies the vapor sucked by the vapor recovery device main body 43 to the ventilation pipe 50.

A downstream portion 45b of the vapor recovery pipe 45 from the apex 45a is constructed so as to have a downward slope. That is, the entire pipe line from the apex 45a of the vapor recovery pipe line 45 to the position connected to the ventilation pipe 50 has a downward slope.

A part of the vapor recovery pipe 45 (L-shaped pipe 45e) is configured to be detachable. The L-shaped pipe 45e is removably fixed by flange joints 45c and 45d on the upstream side and the downstream side, respectively. The L-shaped pipe 45e is provided near the ventilation pipe 50 from the viewpoint of maintenance.

(ventilation pipe 50)
The ventilation pipe 50 is connected to the gas phase part of the underground tank 2. The vent pipe 50 releases the pressure inside the underground tank 2 to the atmosphere when the pressure inside the underground tank 2 becomes higher than atmospheric pressure, and also releases the pressure inside the underground tank 2 to the atmosphere when the pressure inside the underground tank 2 becomes lower than atmospheric pressure. This is an existing facility that introduces atmospheric air into the underground tank 2. The ventilation pipe 50 includes a lower ventilation pipe 51 connected to the underground tank 2, a middle ventilation pipe 52, an upper ventilation pipe 53, a branch pipe joint 54 connecting the lower ventilation pipe 51 and the middle ventilation pipe 52, and a middle ventilation pipe 52. It has a vapor recovery connection part 55 for unloading that connects to the upper ventilation pipe 53, and a ventilation port 56 provided at the tip of the upper ventilation pipe 53. This vent 56 opens high above the ground. Therefore, when the pressure in the underground tank 2 becomes higher than atmospheric pressure, the gas in the underground tank 2 is released to the atmosphere through the lower ventilation pipe 51, the middle ventilation pipe 52, the upper ventilation pipe 53, and the vent 56. Further, when the pressure inside the underground tank 2 becomes lower than atmospheric pressure, the atmosphere is introduced into the underground tank 2 through the vent 56, the upper ventilation pipe 53, the middle ventilation pipe 52, and the lower ventilation pipe 51. Additionally, inside the vent 56, there is an atmosphere introduction valve (not shown) that opens when the pressure inside the underground tank 2 becomes lower than atmospheric pressure, and an atmosphere introduction valve (not shown) that opens when the pressure inside the underground tank 2 becomes higher than atmospheric pressure by a predetermined pressure. An atmosphere release valve 56a is provided that opens when

A lower vent pipe 51 , a middle vent pipe 52 , and a vapor recovery pipe 45 are connected to the branch pipe joint 54 . The branch pipe joint 54 to which the vapor recovery pipe 45 is connected is provided closer to the underground tank 2 than the unloading vapor recovery connection 55. That is, the vapor recovery pipe 45 is connected to the ventilation pipe 50 on the underground tank 2 side from the unloading vapor recovery connection part 55.

The unloading vapor recovery connection part 55 introduces the vapor in the underground tank 2 into the tank (not shown) of the tank lorry (not shown) when the oil liquid is unloaded from the tank lorry to the underground tank 2. It is a mechanism to do this. The middle ventilation pipe 52 is connected to the lower connection port 55a of the vapor recovery connection part 55 for unloading, the upper ventilation pipe 53 is connected to the upper connection port 55b, and the hose connection port 55c is connected to the tank of the tank lorry vehicle. A vapor recovery hose 4 is connected during unloading. The hose connection port 55c has a connection valve that opens when the vapor recovery hose 4 is connected during unloading, and closes when the vapor recovery hose 4 is not connected during unloading. 55e is provided. As a result, since the connection valve 55e is closed except when oil is being unloaded from the tank truck to the underground tank 2, the gas in the underground tank 2 can leak out from the hose connection port 55c to the outside. Also, air is prevented from entering through the hose connection port 55c.

Further, the unloading vapor recovery connection section 55 has a switching valve 55d, which is an on-off valve, at the connection section with the upper ventilation pipe 53. After the vapor recovery hose 4 is connected during unloading, when the pressure inside the central ventilation pipe 52 increases due to oil being unloaded from the tank lorry to the underground tank 2, the switching valve 55d is activated. The valve is closed in response to this, and the outflow direction of vapor discharged from the underground tank 2 to the ventilation pipe 50 is switched to the vapor recovery hose 4 during unloading. In addition, when the vapor recovery hose 4 is not connected during unloading, the switching valve 55d is opened to connect the upper ventilation pipe 53 and the underground tank 2, thereby preventing the oil in the underground tank 2 from being connected. In order to prevent the inside of the underground tank 2 from becoming negative pressure when the liquid level of the oil liquid in the underground tank 2 decreases as the liquid is refueled to the target to be refueled through the refueling nozzle 30, the oil is sent to the underground tank 2. This allows for the inflow of air.

Next, the flow of vapor will be explained.

(When unloading oil from a tank truck to underground tank 2)
First, the flow of vapor when unloading oil from the tank truck to the underground tank 2 will be explained. A vapor recovery hose 4 is connected to the upper part of the tank of the tank truck when unloading. One end of this hose 4 for vapor recovery during unloading is connected to the upper part of the tank of the tank lorry, and the other end is connected to the hose connection port 55c of the connection part 55 for vapor recovery for unloading.

When the oil liquid is unloaded from the tank of the tank truck to the underground tank 2, the vapor in the gas phase of the underground tank 2 is transferred to the lower ventilation pipe 51, the branch pipe joint 54, the middle ventilation pipe 52, and the unloading vapor recovery connection. 55 (hose connection port 55c) and the vapor recovery hose 4 during unloading, the vapor is collected in the tank of the tank lorry. In this manner, all of the vapor is collected in the tank of the tank lorry, so that the vapor is not discharged to the outside from the tip of the upper ventilation pipe 53.

(When refueling from the refueling nozzle 30 to the target)
Next, the flow of vapor when refueling from the refueling nozzle 30 to an object to be refueled will be explained. When refueling an object to be refueled from the refueling nozzle 30 , vapor is sucked from the vapor suction port 31 of the refueling nozzle 30 by driving the suction pump 41 . Here, the oil level in the underground tank 2 decreases as refueling progresses from the refueling nozzle 30 to the target, and the upper space (volume of the space) in the underground tank 2 expands, causing the vapor suction port 31 to The sucked vapor is collected into the underground tank 2 via the vapor suction tube 32, the suction pump 41, the check valve 44, the vapor recovery pipe 45, the branch pipe joint 54, and the lower ventilation pipe 51.

(When refueling from the refueling nozzle 30 to the refueling target during unloading of oil by a tank truck)
Next, a description will be given of the flow of vapor when refueling from the refueling nozzle 30 to the object to be refueled during unloading of oil by the tank truck. When refueling a target from the refueling nozzle 30 during unloading of oil by a tank truck, vapor is sucked from the vapor suction port 31 of the refueling nozzle 30 by driving the suction pump 41 . The vapor sucked from the vapor suction port 31 is transferred to the vapor suction tube 32, the suction pump 41, the check valve 44, the vapor recovery pipe 45, the branch pipe joint 54, the middle ventilation pipe 52, and the unloading vapor recovery connection 55 ( The vapor is collected into the tank of the tank truck and the underground tank 2 via the hose connection port 55c) and the vapor recovery hose 4 during unloading.

(Effects of Example 1)
When introducing the suspended type refueling system 1 with a vapor recovery function of Embodiment 1 in a small gas station due to the demand for replacement with a suspended type refueling system with a vapor recovery function, the vapor recovery pipe 45 is installed above ground and the existing By connecting to the ventilation pipe 50, the construction of underground piping is unnecessary, and vapor discharged from a refueling object such as a vehicle during refueling can be collected into the underground tank 2. As a result, it is possible to prevent the length of construction period and increase in construction cost related to the construction of underground piping.

Furthermore, in Embodiment 1, the vapor recovery pipe 45 is connected to the vent pipe 50 on the side of the underground tank 2 rather than the connection valve 55e, so that the oil liquid can be unloaded from the tank truck to the underground tank 2. Even when simultaneously refueling a refueling target such as a vehicle, the vapor discharged from the vapor recovery pipe 45 is collected into the underground tank 2 and/or the tank lorry without being released into the atmosphere via the ventilation pipe 50. It is possible to preserve the atmosphere.

In addition, in the first embodiment, by providing the check valve 44 between the suction pump 41 and the connection part (branch pipe joint 54) of the ventilation pipe 50, when unloading oil from the tank truck to the underground tank 2, The vapor discharged from the underground tank 2 into the ventilation pipe 50 can be prevented from flowing back to the suction pump 41 via the vapor recovery pipe 45. Thereby, it is possible to prevent functional deterioration of the vapor recovery device 40 and vapor leakage from the vapor suction port 31.

Further, in the first embodiment, by constructing the downstream portion 45b of the vapor recovery pipe 45 from the apex 45a to have a downward slope, it is possible to prevent the vapor from accumulating in the vapor recovery pipe 45, and to prevent the vapor from accumulating in the vapor recovery pipe 45. Even if it liquefies in the vapor recovery pipe 45, it can flow out into the ventilation pipe 50.

In addition, in the first embodiment, by housing the suction pump 41 and motor 42 that suck vapor discharged from the refueling target when refueling the refueling target in the delivery unit 20, more space is available than on the ground. A suction pump 41 and a motor 42 can be installed at a certain position. This makes it possible to introduce the suspended type refueling device 1 with a vapor recovery function of the first embodiment even in a refueling station where there is no space on the ground.

(Example 2)
FIG. 2 is a diagram showing the overall configuration of a ground-mounted refueling device with a vapor recovery function according to a second embodiment. In the first embodiment, a suspended type refueling device 1 with a vapor recovery function was described, but the refueling device with a vapor recovery function of the present invention is a ground-mounted refueling device with a vapor recovery function, as shown in the figure. Good too. Explanation that overlaps with Example 1 will be omitted as appropriate.

The installed type refueling device 100 with a vapor recovery function according to the second embodiment includes a pump device 10, a refueling nozzle 30, a vapor recovery device 40, and a vent pipe 50.

Pump equipment 10 includes a pump 11, a motor 12, and a flow meter 14. Further, in the second embodiment, the pump device 10 houses a suction pump 41 that sucks vapor from the vapor suction tube 32 and discharges it to the vapor recovery pipe 45, and a motor 42 that drives the suction pump 41. .

The vapor recovery device 40 of the second embodiment is similar to the first embodiment, and is a device installed above ground, and installation of the vapor recovery device 40 does not require construction of underground piping. The vapor recovery device 40 includes a suction pump 41, a motor 42, a check valve 44, and a vapor recovery conduit 45.

(Modified example)
Although the present invention has been described above along with the embodiments, the above embodiments are merely examples of implementation of the present invention, and the technical scope of the present invention should not be construed as limited by these embodiments. This is something that should not happen. That is, the present invention can be implemented in various forms without departing from its technical idea or main features.

1: Suspended type refueling device with vapor recovery function, 2: Underground tank, 3: Canopy, 4: Hose for vapor recovery during unloading, 10: Pump equipment, 11: Pump, 12: Motor, 13: Refueling piping, 20 : Delivery unit, 21: Refueling hose, 22: Hose reel, 30: Refueling nozzle, 31: Vapor suction port, 32: Vapor suction tube, 40: Vapor recovery device, 41: Suction pump, 42: Motor, 43: Vapor Recovery device main body, 44: Check valve, 45: Vapor recovery pipe for supply (vapor recovery pipe), 45a: Vertex, 45b: Portion downstream from the peak, 45c, 45d: Flange joint, 45e: L-shape Piping, 50: Ventilation pipe, 51: Lower ventilation pipe, 52: Middle ventilation pipe, 53: Upper ventilation pipe, 54: Branch pipe joint, 55: Unloading vapor recovery connection, 55d: Switching valve, 55e: Connection valve (switching means), 56: vent, 56a: atmosphere release valve, 100: ground-mounted refueling device with vapor recovery function

Claims (6)

a refueling nozzle that supplies oil liquid stored in an underground tank to a refueling target;
a ventilation pipe having one end connected to the underground tank and the other end opening at a high place above ground, communicating the underground tank with the outside;
A vapor recovery pipe whose one end opens toward the refueling nozzle side and collects vapor discharged from the refueling target when refueling the refueling target, and whose other end is connected to the ground position of the ventilation pipe. A conduit and
A refueling device with a vapor recovery function, characterized by comprising: a vapor recovery connection part for unloading, which is provided at an above ground position of the ventilation pipe, and to which a vapor recovery pipe of the tank lorry is connected when unloading the oil liquid from the tank lorry to the underground tank;
an atmosphere release valve that is provided on the ventilation pipe on the side of the opening to the outside of the ventilation pipe and switches between communication and isolation between the underground tank and the outside of the ventilation port,
2. The refueling device with a vapor recovery function according to claim 1, wherein the vapor recovery pipe is connected to an above-ground position of the ventilation pipe on the underground tank side from the unloading vapor recovery connection part. a suction pump that is provided in the vapor recovery conduit and that sucks vapor discharged from the refueling target when the refueling target is refueled by the refueling nozzle;
The vapor recovery pipe is provided in the vapor recovery pipe between the suction pump and the connection part of the ventilation pipe, and prevents vapor from flowing into the suction pump from the ventilation pipe, and prevents vapor from flowing from the suction pump into the ventilation pipe. a check valve that allows vapor to flow out;
The refueling device with vapor recovery function according to claim 2, further comprising the following. The refueling device with a vapor recovery function according to claim 1, wherein a portion of the vapor recovery pipe downstream from the apex is constructed so as to have a downward slope. When unloading oil into the underground tank, the other end of the hose for collecting vapor during unloading is connected to the other end of the hose, which is connected to the tank of the tank lorry when unloading the oil liquid to the underground tank. an unloading vapor recovery connection part for supplying vapor discharged from the underground tank to the tank when unloading the oil liquid to the underground tank;
When the unloading vapor recovery hose is connected, the unloading vapor recovery connection unit directs the outflow direction of vapor discharged from the underground tank to the ventilation pipe to the unloading vapor recovery hose. and a switching mechanism that switches the underground tank and the other end of the ventilation pipe into communication when the vapor recovery hose is not connected during unloading,
The refueling supply with vapor recovery function according to claim 1, wherein the connection position of the vapor recovery pipe with the ventilation pipe is closer to the underground tank than the unloading vapor recovery connection part. Device. The vapor recovery pipe is provided with a suction pump that sucks vapor discharged from the refueling target when the refueling target is refueled by the refueling nozzle,
The refueling device with a vapor recovery function according to claim 2, wherein the suction pump is provided in a delivery unit that suspends the refueling nozzle.

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