JPH0597199A - Blower for vapour recovery of oil feeder - Google Patents

Abstract

PURPOSE:To securely prevent vapour from flowing out from a vapour collector by use of a check valve, even when the inside of an underground tank becomes positive as the result of unloading, by providing a check valve preventing the flow to the vapour collector side in a blower for vapour recovery. CONSTITUTION:The casing 12 of a fluid motor 11 and the casing 22 of a blower 2 1 are jointed to each other through a joint casing 31. And the motor side casing 12 is equipped to an oil feeding pipe S and the blower side casing 22 is equipped to a vapour collecting pipe E respectively. And in the casings 12, 22, respectively a pair of roters 14, 24 are contained to be freely rotatable in a mutually engaged condition in the respective roter chambers 13, 23. In the above construction, a check valve 27 preventing the flow to the upstream is arranged at the opening 22a of the downstream side in the blower side casing 22. When the vapour generated in the underground tank begins to flows out, the vapour is prevented from flowing out in this side of the blower 21 by the function of the check valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower recovery blower for a refueling machine.

[0002]

2. Description of the Related Art A technique is known in which a nozzle of a refueling machine is provided with a vapor collector for recovering vapor generated during refueling, and the vapor is sucked and recovered.
It is disclosed in Japanese Patent No. 12015. In addition, a technique for providing a fluid motor in the oil supply pipe for recovering the vapor, providing a blower driven by the fluid motor in the vapor recovery path, and returning the sucked vapor to the underground tank is disclosed in Japanese Patent Application No. Proposed in 150495.

[0003]

However, in an oil filling station equipped with such a gas filling machine, a large amount of oil is injected during the unloading from the lory to the underground tank, so that the underground tank becomes positive pressure and the underground tank vapor is refueled. Eject from the vapor collector of the nozzle.

It is an object of the present invention to propose a vapor recovery blower for a fuel filler, which prevents vapor from being ejected from a vapor collector.

[0005]

According to the present invention, the blower for vapor recovery is provided with a check valve for blocking the flow toward the vapor collector side.

[0006]

In the vapor recovery blower of the fuel dispenser configured as described above, even if the underground tank has a positive pressure due to unloading, the vapor is blocked by the check valve and jetted from the vapor collector. Certainly prevented.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a fueling station equipped with a fueling machine A embodying the present invention. A pump 3 rotated by a drive motor M of the fueling machine A pumps oil from an underground tank T through a fueling pipe L. Suck up. The refueling pipe S from the pump 3 is provided with a fluid motor 11, the flowmeter 4 is connected to the downstream side thereof, and the refueling nozzle 2 is connected to the downstream side via a refueling hose 1. ing. The flow rate of the flow meter 4 is displayed on the display 7 by the control device 6 via the flow pulse generator 5. The control device 6 is provided with a nozzle switch SW that detects that the refueling nozzle 2 has been removed from the nozzle hook 8. Further, the vapor of the vapor recovery hose 9 connected to the vapor collector 9 a provided in the fueling nozzle 2 is sucked by the blower 21 driven by the fluid motor 11 and returned to the underground tank T via the vapor recovery pipe E. It is like this. On the other hand, Lori 40
A vapor recovery hose 41 connected to the air vent 42 of the underground tank T is provided in the.

2 and 3, the casing 12 of the fluid motor 11 and the casing 22 of the blower 21 are connected via a connection casing 31, and the casing 12 on the fluid motor 11 side is connected to the oil supply pipe S and the blower. The casing 22 on the 21 side is interposed in each of the vapor recovery pipes E. Both of the casings 12 and 22 are formed in the same shape, and a pair of four-leaf type rotors 14 and 24 having the same shape are rotatably housed in the respective rotor chambers 13 and 23 while maintaining a meshing relationship with each other. There is.

One rotor shaft 15 of the fluid motor 11
Passes through the partition wall 32 of the connection casing 31 and blower 2
A drive gear 17 having a one-way clutch is attached to the end of the drive gear 17 protruding to the second side. This drive gear 17
Is configured to transmit a driving force to the blower 21 via a driven gear and an intermediate gear (not shown) fixed to one rotor shaft 25 of the blower 21. With these gear devices, the rotor 24 of the blower 21 is rotated at a speed of 2 to 2.5 times the rotational speed of the rotor 14 of the fluid motor 11, that is, the vapor discharge amount is 13 to 30 times larger than the oil supply amount.
It is about 35% higher. Also, blower 21
In order to lubricate the rotor 24 of the rotor 24, a port 16 is opened on the downstream side of the rotor 14, and the port 16 is formed by the partition wall 33.
Is connected to one end of a pipe 33 extending therethrough, and the other end of the pipe 33 is connected to an upstream port 26 of the rotor 24. A check valve 27 that blocks the upstream flow is provided at the downstream opening 22a of the casing 22 of the blower 21.

Therefore, at the time of refueling work, an operator removes the refueling nozzle 2 from the nozzle hook 8 and inserts the refueling nozzle 2 into the refueling port of a fuel tank of an automobile to refuel. The vapor generated at that time is sucked by the blower 21. Blower 2
Since 1 is always operated by the fluid motor 11 during refueling, the downstream side thereof is positive pressure during refueling. Therefore, the check valve 27 is opened and the vapor is returned to the underground tank T through the vapor recovery pipe E, so that no problem occurs.

When unloading from the lory 40 to the underground tank T, the inside of the underground tank T becomes positive pressure, and the vapor generated in the underground tank T passes through the vapor recovery pipe E,
Although it tends to jet from the vapor collector 9, according to the present invention, since the check valve 27 is provided, it is possible to surely prevent the inconvenience that the blocker is blocked before the blower 21 and the vapor flows out.

Since the blower 21 is provided with a check valve 27 to prevent the reverse flow of the vapor, the paper collecting passage E is extended as shown by the dotted line in FIG. 1 to collect one vapor of another refueling machine. It will be possible to share it on the road and collect it.

[0014]

Since the present invention is configured as described above, it is possible to reliably prevent the vapor jet from the vapor collector.

[Brief description of drawings]

FIG. 1 is a side view showing a gas station equipped with a fuel dispenser embodying the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 A ... Refueling machine E ... Vapor recovery path L ... Refueling pipe M ... Drive motor S ... Refueling pipe SW ... Nozzle switch T ... Underground tank 1 ... Refueling hose 2・ ・ ・ Refueling nozzle 3 ・ ・ ・ Pump 4 ・ ・ ・ Flow meter 5 ・ ・ ・ Flow pulse generator 6 ・ ・ ・ Control device 7 ・ ・ ・ Display meter 8 ・ ・ ・ Nozzle hook 9 ・ ・ ・ Vapor recovery hose 9a ... Vapor collector 11 ... Fluid motor 12 ... Casing 13 ... Rotor chamber 14 ... Rotor 15 ... Rotor shaft 16 ... Port 17 ... Drive gear 21 ... Blower 22 ... Casing 22a ... Downstream opening 23 ... Rotor chamber 24 ... Rotor 25 ... Rotor shaft 26 ... Port 27 ... Check valve 31 ... Connection casing 32 ... Partition wall 33 ... Pipe 40 ... Over Li 41 ... vapor recovery hose 42 ... Beparikabari tube

Claims (1)

[Claims] 1. A blower recovery blower for a refueling machine, wherein the vapor recovery blower is provided with a check valve for blocking a flow toward the vapor collector side.