JPH03240699A - Vapor recovering device - Google Patents

Abstract

PURPOSE:To insert a tube and to dispose a tube for passing fuel therein by inserting the tube into an oil supply tube for connecting an underground oil storage tank to an oil supply unit, branching the supply tube and the tube at a branch end, using the interior of the tube as a fuel passage, and a space between the supply tube and the tube as a vapor passage. CONSTITUTION:A tube 5 is inserted into an oil supply tube 4 in an oil supply unit 1, guided into a lower tube 4' at a branch port 15, and dipped in fuel 6. On the other hand, a branch tube 7 is connected to the port 15, and to other tube 8 to bring a space 9 in an underground oil tank 3 into communication with a vapor passage 16 in the tube 4. Then, when the unit 1 is operated to fill a vehicle with fuel, fuel 6 in the tank 3 is fed through a check valve 14, a water remover 13 from the end of the tube 5, and guided into the unit 1 through a fuel passage 17 in the tube 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to steam recovery in extraction stations.

(Prior Art) Equipment for recovering steam stored in the fuel tank of an automobile usually includes a dedicated steam recovery pipe from a refueling machine to return the steam to an underground storage extraction tank.

In other words, a steam recovery pipe was specially buried underground.

As a countermeasure to this problem, a steam recovery pipe is inserted into the oil supply pipe to recover the steam without burying the pipe separately (see Japanese Patent Laid-Open No. 142195/1983).

(Problems to be Solved by the Invention) However, when using the invention (Japanese Unexamined Patent Publication No. 61-142195), the steam recovery pipe is inserted into the oil supply pipe and protrudes into the upper space of the underground oil storage tank. The problem is. That is, since a backflow prevention valve and a water remover are provided at the tip of the oil supply pipe, there is a problem in inserting the oil supply pipe.

Furthermore, it is unreasonable to insert the steam recovery pipe into the fuel supply pipe so that the steam passage is on the inside and the fuel passage is on the outside. That is, as the fuel supply pipe ages, a hole develops in the fuel supply pipe, and fuel flows out from the hole, creating a dangerous situation.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned conventional problems, and is characterized by the fact that the Insertion was made possible by inserting a tube and branching the oil supply piping and the tube at the distal end. Further, the problem was solved by making the inside of the pipe a fuel passage and the outside part a steam passage.

(Function) According to the present invention, first, a pipe is inserted from the end of the refueling pipe that connects the underground storage extraction tank and the refueling machine, and the refueling pipe is branched at the branch end of the refueling pipe. By connecting the branch pipe to the other pipe, the space inside the underground oil storage tank and the oil supply pipe are integrally formed, so that the steam recovered from the fuel tank is transferred to the underground oil storage via the passage of the oil supply pipe. It is collected in the space inside the tank.

In addition, the pipe is inserted into the existing branched oil supply pipe and
j'' By arranging the opening of the pipe below the fuel liquid level in the oil tank, the refueling machine side and the fuel side in the underground oil storage tank are integrally formed via the pipe passage. Accordingly, the fuel dispenser performs suction, draws up the fuel in the underground storage tank, and distributes it to the fuel dispenser.

(Example) Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a longitudinal sectional front view of the steam recovery device of the present invention, and FIG. 2 is a sectional view of a portion of the oil supply piping.

A refueling machine stand 2 is shown below the refueling machine 1 in FIG. The tip is immersed in fuel 6. The other end of the pipe 5 is located inside the refueling machine 1 (not shown). The branch pipe 7 is connected to the other pipe 8, and the other pipe 8 communicates with a space 9 inside the underground oil storage tank 3.

On the other hand, the underground oil storage tank 3 is provided with a meter 10 for checking the remaining thickness of the fuel 6, an oil filling pipe 11 for replenishing fuel, and a vent pipe 12 communicating with the atmosphere.

Further, in the underground oil storage tank 3, there are provided a down pipe 1F of the oil supply pipe 11, a down pipe 4' of the oil supply pipe 4, and a water remover 13 and a check valve 14 at the end of the down pipe 4°. There is. The steam recovery device of the present invention has a pipe 5 in the fuel supply pipe 4 in the fuel supply machine 1.
Insert the pipe 5 into the down pipe 4° through the branch port 15, and immerse it in the fuel 6.

On the other hand, a new branch pipe 7 is installed from the mI branch port 15, and the other pipe 8
By connecting this, the space 9 in the underground oil storage tank 3 and the steam passage 16 in the oil supply pipe 4 are brought into communication.

Next, when the fuel tank 1 is activated to fill the car with fuel, the fuel 6 in the underground oil storage tank 3 flows through the check valve 14, the water remover 13, and the tip of the pipe 5, and goes to the fuel passage 17 in the pipe 5. The fuel 6 is guided into the refueling machine 1 through.

In addition, the steam recovered by the refueling machine 1 is guided to the refueling pipe 4 in the refueling machine 1, passes through the steam passage 16 in the refueling pipe 4, passes through the branch pipe 7 from the branch port 15, and passes through the other pipe 8 underground. Steam is recovered into a space 9 within the storage tank 3.

The present invention is not limited to the above-mentioned embodiments, but can be implemented efficiently by appropriately combining connecting pipes, etc.

(Effects of the Invention) As described above, the present invention enables the insertion of a pipe, and by placing the fuel passage pipe inside, the fuel can be safely disposed in terms of fire prevention.

Furthermore, since the existing fuel supply piping can be used, there is no need to install a new steam recovery pipe, resulting in savings in construction costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view of an embodiment of the present invention, and FIG. 2 is a sectional view of the oil supply piping portion. l...Refueling machine, 2...Refueling machine stand 3
...Underground oil storage tank, 4...Refueling pipe 4'...Down pipe, 5...Pipe,
6... Fuel 7... Branch pipe, 8...
...other tube, 9...space lO...
Instrument, 11... Oil supply pipe, 11'...
... Down pipe 12 ... Ventilation pipe, 13 ...
・Water remover, 14...Check valve 15...
Branch port, 16...Steam passage 17...
fuel passage.

Claims (1)

[Claims] In equipment for recovering vapor from a fuel tank of an automobile, a pipe is inserted into a fuel supply pipe that connects an underground fuel storage tank and a fuel supply machine, and the pipe is branched from the fuel supply pipe at a branching end, and the inside of the pipe is A steam recovery device characterized in that a fuel passage is provided, and a steam passage is provided between the refueling pipe and the pipe.