JPH05330600A - Vapor recovery device of oil feeding apparatus - Google Patents

Abstract

PURPOSE:To simplify the structure of a vapor recovery device, by equipping an ejector in the flow way of air bubble-bearing oil separated in a gas-liquid separator to conduct to the gas-liquid separating chamber and jointing a vapor recovery pipe from an oil feeding nozzle to the blowing side of the ejector. CONSTITUTION:When a pump 43 is operated in an oil feeding work, the air- bearing oil separated in a gas-liquid separator V is conducted from the path 53a to an ejector 59 and the air-bearing oil separated in a moderate flowing chamber 44 is conducted from the path 53b to the ejector respectively. These air-bearing oil are ejected from the ejector 59 to the path 57. At this time, the vapor from a vapor collector of the oil feeding nozzle is sucked through a recovery pipe Q to recover it into a gas-liquid separating chamber 48 and returned to the underground tank through a vapor recovery pipe E. The oil in the gas-liquid separating chamber 48 is recycled to the chamber 42 of tame pump 43 side by the actuation of a float valve 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a pump device, a gas-liquid separating device for introducing oil from the pump device, and a gas-liquid separating chamber for introducing oil containing bubbles separated by the gas-liquid separating device. The present invention relates to a vapor recovery device for an oil supply device.

[0002]

[Prior Art] During refueling work, the refueling nozzle is inserted into the fuel tank of an automobile. At that time, oil vapor is generated, which may cause pollution, ignition, etc.
A technique has been proposed in which the vapor is collected by a vapor collector provided in a fueling nozzle, and the collected vapor is returned to the upper part of an underground tank (for example, Japanese Patent Application No.
25426).

[0003]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to better understand the present invention, its prior art will be described with reference to FIG. In FIG. 4, a plurality of (two in the illustrated example) refueling machines A1 and A2 are installed. The refueling machine A1 refuels, for example, regular gasoline from an underground tank T1, and the refueling machine A2 refuels, for example, high-octane gasoline underground. Refuel from tank T2. The pump of the pump device P1 which is rotated by the drive motor M1 sucks up oil from the underground tank T1 via the oil supply line L1. A fluid motor F1 is connected to the oil supply pipe S1 from the pump, a flowmeter C1 is connected to the downstream side thereof, and an oil supply hose H1 is connected to the downstream side thereof. The flow rate of the flow meter C1 is indicated on the display meter D1.

On the other hand, the vapor from the vapor recovery hose R1 and the recovery pipe Q1 is sucked by the blower B1 which is rotated by the fluid motor F1, flows into the gas-liquid separation chamber of the pump device P1, and then passes through the vapor recovery pipe E1. Underground tank T
It is set back to 1, T2.

In FIG. 4, a suffix 2 is attached to each of the above parts of the oil supply machine A2.

Generally, the fuel tankers A1 and A2 are arranged at relatively close positions, but the underground tanks T1 and T2 are provided at positions away from the fuel tankers A1 and A2. Therefore, the vapor recovery pipes E1 and E2 are connected to the common pipe E3, and the common pipe E3 is connected to the underground tank T1 or T2.
Near underground, branching into branch pipes E4 and E5
1 and T2, respectively.

FIG. 5 is a sectional view of the pump device P1 shown in FIG. 4, and in FIG. 5, the casing 4 of the pump device P1 is shown.
At 0, an oil inlet I and an oil outlet O are provided. The inflow port I opens into a chamber 42 provided with a strainer 42a on the inflow side. An internal gear pump 43 is provided substantially at the center of the casing 40. This pump 43 has a suction port 4
It has 3a and the discharge port 43b, and the discharge port 43b of the pump 43 is connected to the slow flow chamber 44 via the gas-liquid separator V. In the gentle flow chamber 44, a liquid passage is configured so that oil containing no bubbles flows into the strainer chamber 45 provided with the strainer 45a on the outflow side, and the strainer chamber 45 on the outflow side and the outflow port. Control valve 4 between O
6 is provided.

The gas-liquid separation device V generates a swirling flow in the oil from the pump 43, and the oil containing bubbles gathers in the center and flows into the flow path 53.
The oil flowing into the flow path a and containing the bubbles in the gentle flow chamber 44 flows into the flow path 53b. The reason why the oil containing bubbles flows in the flow path 53a is that the Japanese Patent Application No.
-5494. An inlet portion of the merged flow path 53 communicates with a gas-liquid separation chamber 48 provided with a float valve 60 that controls the outflow of gas mixed oil. The gas separated in the gas-liquid separation chamber 48 is vapor recovery pipe E1.
The oil which has flowed into the underground tank from which the gas has been separated flows into the liquid passage 55. The liquid passage 55 communicates with the strainer chamber 42 on the inflow side. A gas outflow control valve 47 for controlling outflow of gas flowing from the vapor recovery pipe E1 to the underground tank is provided in the gas-liquid separation chamber 48, and oil flowing from the liquid passage 55 to the strainer chamber 42 is controlled. A float valve 50 is provided. And the blower B1
The recovery pipe Q1 from is connected to the gas-liquid separation chamber 48.

Therefore, when the pump 43 is rotated by the motor M1, the oil flows from the inflow port I to the strainer chamber 4 on the inflow side.
2. The gas is discharged from the outlet O through the pump 43, the gas-liquid separator V, the gentle flow chamber 44, the strainer chamber 45 on the outflow side, and the control valve 46. Gas-liquid separator S and slow flow chamber 44
The oil containing the gas from the gas flows to the gas-liquid separation chamber 48, where the gas is recovered from the recovery pipe E1 to the underground tank.

On the other hand, the fluid motor F1 operates by refueling, drives the blower B1 to suck the vapor, and guides it to the gas-liquid separation chamber 48 via the vapor recovery pipe Q1. While such a technique is useful in its own right, fluid motors and blowers generally have a complicated structure, are prone to failure, and are expensive.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vapor recovery device for an oil supply system which has a simple structure and is inexpensive.

[0012]

According to the present invention, a pump device, a gas-liquid separator for guiding oil from the pump device, and a gas-liquid for guiding oil containing bubbles separated by the gas-liquid separator. In a vapor recovery device of an oil supply device including a separation chamber, an ejector is provided in a flow path that guides the oil containing the bubbles to the gas-liquid separation chamber, and a vapor recovery pipe from the oil supply nozzle is connected to the ejection side of the ejector. There is.

[0013]

[Description of Operation and Effects] Therefore, when the pump is operated during refueling work, the oil containing bubbles separated by the gas-liquid separation device and the vapor separated in the slow flow chamber are provided in the flow path leading to the gas-liquid separation chamber. Flow into the gas-liquid separation chamber through the ejector. At that time, the vapor recovery pipe becomes a negative pressure due to the ejector effect, and the vapor is sucked from the vapor collector of the oil supply nozzle.

For example, in a fixed type oil supply device, when the oil supply nozzle is removed from the nozzle hook, the pump motor is driven, so that as long as the pump is operating,
Since oil containing bubbles is flowing in the flow path, the suction work by the ejector is performed during the oil supply work, and the vapor can be sucked.

As described above, according to the present invention, it is possible to obtain a vapor recovery device having a simple structure and free from a failure etc. only by providing a relatively inexpensive ejector.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

In these figures, the parts corresponding to those in FIG. 5 are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 1 shows an oil supply apparatus for carrying out the present invention.
The refueling device 30 includes a pump device P driven by a motor 31, to which a refueling pipe L and a vapor recovery pipe E are connected to an underground tank (not shown), and further a vapor recovery pipe Q is connected. Has been done. A flow meter 34 is attached to the discharge pipe 33 connected to the pump device P.
And the hose 35 is connected to the hose 3
A refueling nozzle 1 is connected to 5, and a vapor recovery hose R is connected to a vapor collector 4 provided in the refueling nozzle 1. Further, the refueling device 30 is provided with a nozzle switch 36 that detects that the refueling nozzle 1 is removed from the refueling device 30, and the switch 36 is connected to the control device 37. Further, the control device 37 has
A drive signal is output to the drive unit 31a of the motor 31. The flow rate pulse transmitter 34a provided in the flow meter 34 outputs a pulse signal to the controller 37, and according to the output signal,
The amount of refueling, etc. is displayed on the display 38.

FIG. 2 shows a refueling nozzle 1 embodied in the present invention. The refueling nozzle 1 comprises a barrel tip portion 2, a barrel body portion 10, and a grip portion 25.

The cylinder tip portion 2 is a portion to be inserted into a fuel filler port of an automobile, and is provided with a nozzle portion 3 having a fuel filler port engaging piece 3a. A vapor collector 4 made of transparent oil-resistant plastic or rubber is provided on the outer circumference of the nozzle portion 3.
Is provided. The tip portion 4a of the vapor collector spreads like a trumpet so that the vapor collector can be easily sealed with the fuel filler port and the vapor can be easily collected.
The rear end of the vapor collector 4 is tightly attached by a band 4b to an attachment cylinder 5 protruding from the outer peripheral portion of the nozzle portion 3, and a vapor recovery passage 6 is opened at a substantially intermediate position thereof. The recovery passage 6 is arranged outside the barrel portion 10 as shown in the drawing.

The nozzle portion 3 of the cylinder tip portion 2 fluidly communicates with the cylinder body portion 10, and an oil supply valve 12 is provided in the cylinder body portion 10. The oil supply valve 12 is movable in the axial direction, and the valve 12 abuts on the valve seat at the position shown in the figure so that oil does not flow. However, when the refueling lever 13 is pulled to rotate counterclockwise about the fulcrum 14 and the lever 13 moves the pin of the valve rod 19 to the right, the refueling valve 1
2 opens. Reference numeral 15 in the figure indicates a latch portion of the fuel supply lever 13.

The vapor recovery passage 6 is provided along the outside of the barrel portion 10. In the illustrated embodiment, the vapor recovery passage 6 is formed by a vapor valve 21 urged in the closing direction by a coil spring 20 in the upper portion of the oil supply nozzle 1. It is designed to be opened and closed. When the vapor valve 21 is operated by operating the refueling lever 13, the operating end 22 of the lever opens the vapor valve 21 by causing the rod 23 of the vapor valve 21 to move leftward. Therefore, during refueling, the vapor valve 21 opens to collect the vapor. The vapor recovery passage 6 is provided with the vapor valve 2
1 is connected to a communication pipe (not shown) formed in the central direction of the cylindrical body 10 at a substantially right angle on the downstream side of 1, and passes through a vapor recovery passage 17 and a vapor recovery hose R and a vapor recovery pipe Q to separate the gas-liquid separation chamber 48. Is in communication with.

Since the vapor collector 4 is made of a transparent material, the oil level at the oil filler port can be seen especially when fueling a motorcycle, which is very convenient.

FIG. 3 shows an embodiment of the present invention, in which the oil containing the gas separated by the gas-liquid separation device V of the pump device P flows into the liquid passage 53a as described above, but this passage 53a flows slowly. It merges with the flow path 53b from the chamber 44, communicates with the large-diameter flow path 57, and communicates with the gas-liquid separation chamber 48. Further, according to the present invention, an ejector 59 projecting into the flow path 57 is provided on the upstream side of the liquid passage 57, and a vapor recovery pipe Q is opened and communicated with an annular portion 58 surrounding the ejector 59.

When the pump 43 is operated during the refueling work, the oil containing the gas separated by the gas-liquid separator V is passed through the flow path 5
The oil containing gas separated from 3a and in the slow flow chamber 44 flows from the flow passage 53b toward the flow passage 57, respectively.
At that time, it ejects from the ejector 59 to the flow path 57. Then, due to the ejector effect, the vapor from the vapor collector 4 is sucked through the recovery pipe Q, flows into the gas-liquid separation chamber 48, and is returned to the underground tank through the vapor recovery pipe E. The oil accumulated in the gas-liquid separation chamber 48 is returned to the pump-side chamber 42 by the operation of the float valve 50.

[0026]

As described above, according to the present invention, the vapor can be recovered from the vapor collector simply by providing the ejector, and there is no failure and the structure is simple. Since the suction operation is always performed during the pump operation, the vapor can be sufficiently sucked.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an oil supply device embodying the present invention.

FIG. 2 is a side sectional view showing an oil supply nozzle implemented in the present invention.

FIG. 3 is a front sectional view showing a pump device embodying the present invention.

FIG. 4 is an explanatory view showing a conventional device.

FIG. 5 is a front cross-sectional view showing a conventional pump device.

[Explanation of symbols]

 E ... Vapor recovery pipe L ... Oil supply pipe Q ... Vapor recovery pipe R ... Vapor recovery hose 36 ... Nozzle switch 1 ... Oil supply nozzle 2 ... Tube tip 3 ... Nozzle Part 3a ... Refueling engagement piece 4 ... Vapor collector 4a ... Tip part 4b ... Band 5 ... Mounting tube 6 ... Vapor recovery path 10 ... Tube body 12 ... Refueling valve 13 ... Refueling lever 14 ... Support point 15 ... Latch part 17 ... Vapor recovery path 19 ... Valve rod 20 ... Coil spring 21 ... Vapor valve 22 ... Operating end 23 ... Rod 25 ... Grip part 30 ... Lubrication device 31 ... Motor 33 ... Discharge pipe 34 ... Flowmeter 35 ... Hose 36 ... Nozzle switch 37 ... Control Device 38 ... Display 40 ... Sourcing 42 ... Chamber 42a ... Strainer 43 ... Internal gear pump 43a ... Suction port 43b ... Discharge port 44 ... Slow flow chamber 45 ... Strainer chamber 45a ... Strainer 46 ... Control valve 47 ... Gas outflow control valve 48 ... Gas-liquid separation chamber 50 ... Float valve 53a, 53b, 57 ... Flow path 58 ... Annular portion 59 ... Ejector 60 ... ..Float valves

Claims (1)

[Claims] 1. A vaporizer for an oil supply device, comprising: a pump device; a gas-liquid separation device for guiding oil from the pump device; and a gas-liquid separation chamber for guiding oil containing bubbles separated by the gas-liquid separation device. In the recovery device, an ejector is provided in a flow path that guides the oil containing the bubbles to the gas-liquid separation chamber, and a vapor recovery pipe from an oil supply nozzle is connected to a blowout side of the ejector. ..