JPH0565199A - Method and device for inserting suction pipe into oil feed pipe at oil station. - Google Patents

Abstract

PURPOSE:To insert a suction pipe into an oil feed pipe connected to underground tank in an automatic stock adjusting system at an oil station. CONSTITUTION:The method for inserting a suction pipe into an oil feed pipe 3 includes the steps of inserting a guide wire 32 having a light, spherical float 33 attached to its end into the oil feed pipe 3 connected to an underground tank from its exterior end, sending a liquid from the end thereof into the underground tank to force forward the guide wire 32, together with the float 33, through the oil feed pipe with a flow of the liquid, fixing the suction pipe to the base end of the guide wire 32 and pulling the guide wire 32 out from the end of the oil feed pipe 3 to complete passage of the suction pipe through the oil feed pipe 3. This method permits a quick, accurate passage of the suction pipe through the oil feed pipe, regardless of the configuration of the pipe such as bent pipe. Moreover, there is no need to use a wire passing tool and no metal-to-metal contact and the operation can be performed safely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic inventory adjusting system in a gas station, etc., in which a suction pipe (flexible pipe) is inserted into an oil pipe connected to an underground tank.
The present invention relates to a method and a device for inserting the suction pipe into an oil pipe.

[0002]

2. Description of the Related Art When a plurality of underground tanks and a plurality of weighing machines are installed in a gas station, there are weighing machines that are frequently entered by a vehicle and infrequent weighing machines depending on the installation location of the weighing machines. There is a big difference in the amount of refueling. The difference in the amount of refueling is directly related to the amount of stock in the underground tank. Even for the same 10-kiloliter tank, the amount of stock in the tank connected to the weighing machine with a large amount of refueling will rapidly decrease, and the amount of oil with a small amount of refueling will be measured. The tanks connected to the machine are reduced only slightly.
In the end, although one tank was in stock, the other tank was out of stock, and we couldn't use the weighing machine connected to the out-of-stock tank, leading the car to an available weighing machine. There is considerable waste, such as arranging tanker trucks only for tanks that are out of stock.

In order to solve this, suction pipes from a plurality of underground tanks are mutually connected to a three-way valve, and the output of a liquid level detector provided in each underground tank is monitored by a digital level gauge. An automatic balancing system has been proposed in which the three-way valve is operated to change the underground tank to be used according to the change in the stock quantity of each underground tank. However, when trying to install the system at an existing gas station, it was necessary to replace all the piping from the tank to the weighing machine, which required a long construction period and hindered the operation of the gas station. is there.

Therefore, the applicant of the present invention previously invented an automatic inventory amount adjusting system as shown in FIG. 3 and filed a patent application (Japanese Patent Application No. 3-106028). In FIG. 3, 1,
2 is an underground tank, 3 and 4 are oil pipes, and 5 and 6 are lubrication ports. The oil pipes 3 and 4 are used as they are without modification, and the suction pipes 7 and 8 such as flexible pipes are inserted into the oil pipes 3 and 4 so that the tips project into the underground tanks 1 and 2. The base ends of the suction pipes 7 and 8 are taken out to the ground via adapters 9 and 10 provided near the oil pipes 3 and 4.
Suction opening / closing solenoid valves 11 and 12 are connected to the tip ends of the suction pipes 7 and 8 on the ground side. Further, the tips of the oiling pipes 13 and 14 are connected to the adapters 9 and 10 so as to communicate with the interiors of the oil pipes 3 and 4, and the oiling opening / closing solenoid valves are connected to the base ends of the oiling pipes 13 and 14. 15, 16 are connected. An oil supply pump 17 is provided between the suction opening / closing solenoid valves 11 and 12 and the oil supply opening / closing solenoid valves 15 and 16. Reference numeral 22 in the drawing denotes a motor for driving the oil supply pump 17. The underground tanks 1 and 2 are respectively provided with oil level sensors 18 and 19 for detecting the stock quantity, and the detection outputs thereof are input to the digital indicator 20. The output of the digital indicator 20 is input to the solenoid valve control device 21.

One of the oil stock quantities in the underground tanks 1 and 2 detected by the oil level sensors 18 and 19, for example, the stock quantity of the underground tank 1 is below a certain value, or the mutual difference is a certain value. As described above, the solenoid valve control device 21 issues a command to open the suction opening / closing solenoid valve 12 and the oil supply opening / closing solenoid valve 15, and operates the oil supply pump 17. This allows
The oil in the underground tank 2 is sucked up via the suction pipe 8,
The oil is sent to the adapter 9 on the oil inlet 5 side via the solenoid valve 12, the oil supply pump 17, and the solenoid valve 15, and the oil is supplied to the underground tank 1 through the oil pipe 3. When the stock quantity in the underground tanks 1 and 2 reaches a nearly equilibrium value, the pump 17 is stopped and the solenoid valves 12 and 15 are closed. As described above, in the system proposed above, the existing underground oil pipes can be used as they are, so that there is an advantage that there is no business interruption time during the remodeling.

[0006]

However, in the above-mentioned system, when the suction pipe is inserted into the existing or new oil pipe, the wire passing tool used in the electric wiring work is used. Depending on the number of bends, there were things that were very difficult to pass or things that did not pass at all, which made the work extremely difficult, and in some cases the construction had to be stopped. In addition, a spark is generated due to the contact between the oil pipe and the metal of the wire passing tool, and the work is always carried on the risk of ignition, explosion, etc., which causes a safety problem. Therefore, the problem to be solved by the present invention is to reliably, easily and safely perform the piping of the suction pipe in the above system.

[0007]

In order to solve this problem, in the method of the present invention, when inserting a suction pipe into an oil pipe, a guide wire having a light spherical float at its tip is connected to an underground tank. Inserted from the outer end surface of the oil pipe, the liquid is poured from the end surface toward the underground tank, the guide wire is passed through the oil pipe together with the float by the force of the liquid, and the suction pipe is attached to the base end of the guide wire. It is characterized in that the guide wire is fixed and the guide wire passed through the tip of the oil pipe is pulled to insert the suction pipe into the oil pipe. Further, the suction pipe insertion device of the present invention comprises a winding drum rotatably supported in an oil inlet at the base end of the oil pipe, and a guide wire wound around the winding drum and having a float fixed to the tip. It is characterized by

[0008]

By this means, the guide wire with the light spherical float attached to the tip is guided to the tip of the oil pipe along the flow of the liquid regardless of the bending of the oil pipe, and the suction pipe is attached to the base end of the guide wire. Is fixed and the guide wire is pulled to insert the suction pipe into the oil pipe.

[0009]

EXAMPLES The present invention will be specifically described below based on examples. FIG. 1 is an explanatory view showing the method of the present invention, and FIG. 2 is a sectional view showing an embodiment of the device of the present invention. 1 and 2
At the base end of the oil pipe 3, the oil inlet fitting 30
The winding drum 31 is rotatably attached inside the oil inlet fitting 30. A guide wire 32, such as a single wire such as a piano wire (steel wire) or Tegs, or a stranded wire of natural fiber or synthetic fiber, is wound around the winding drum 31, and the tip of the guide wire 32 is oil resistant to float on oil. A flexible float 33 (for example, a metal ball, a synthetic resin ball) is fixed.

When inserting the suction pipe 7 (see FIG. 3), as shown in FIG. 2, the lorry metal fitting 36 at the tip of the lorry hose 34 from the lorry vehicle is attached to the oil filler metal fitting 30 as in the case of normal refueling. The lory metal fitting claw 37 is fixed by engaging the flange portion of the oil filler fitting 30. Reference numeral 35 in the drawing denotes a lorry hose adapter that connects the lorry hose 34 and the lorry metal fitting 36.

In this way, the truck hose 34 is connected to the oil pipe 3
When the oil is supplied from the lorry, the float 33 becomes a resistance against the oil flow, and the float 33 is caused to flow along with the oil flow. Since the oil flows into the underground tank 1, the float 33 is also flowed to the underground tank 1 together. Since the guide wire 32 is connected to the float 33, the guide wire 32 is unwound from the winding drum 31 and passes through the oil pipe 3 to the underground tank 1. By stopping the refueling from the tank truck, tying the base end of the guide wire on the winding drum 31 side to the tip of the suction pipe 7, and pulling the guide wire on the float 33 side inside the underground tank 1, the suction pipe 7 becomes oily. It can be inserted through the pipe 3 to the outlet on the side of the underground tank 1. Figure 1 shows oil piping 3
However, no matter how the oil pipe is bent, the float 33 moves due to the oil flow, so that the suction pipe can be inserted.

The take-up drum 31 is always the lubrication port fitting 3
Although it may be installed at 0, by removing the filler metal 30 from the base end of the oil pipe 3 after the insertion work is completed, the winding drum 31 does not become a resistance during normal refueling.

[0013]

As described above, the present invention has the following effects. The suction pipe can be surely inserted into the oil pipe in a short time regardless of bending of the pipe. There is no need to use a wire passing tool, there is no metal-to-metal contact, and work can be performed safely.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a sectional view showing an embodiment of the device according to the present invention.

FIG. 3 is a configuration diagram showing a configuration example of an inventory amount automatic adjustment system to which the present invention is applied.

[Explanation of symbols]

1, 2 underground tank, 3, 4 oil pipe, 5, 6 oil inlet, 7, 8 suction pipe, 9, 10 adapter, 11, 1
2 Solenoid valve for suction opening / closing, 13, 14 Oil supply pipe, 15, 1
6 Solenoid valve for lubrication opening / closing, 17 Oil supply pump, 18, 19
Oil level sensor, 20 digital indicator, 21 solenoid valve control device, 22 motor, 30 oil inlet fitting, 31 winding drum, 32 guide wire, 33 float, 34 lory hose, 35 lory hose adapter, 36
Lorry bracket, 37 lorry bracket

Claims (2)

[Claims] 1. When inserting a suction pipe into an oil pipe, a guide wire having a light spherical float attached to the tip is inserted from the outer end face of the oil pipe connected to the underground tank, and the liquid is underground from the end face. The guide wire is poured into the oil pipe together with the float by pouring it toward the tank, and the suction pipe is fixed to the proximal end of the guide wire, and the guide wire passed earlier than the tip of the oil pipe is fixed. A method of inserting a suction pipe into an oil pipe at a gas filling station, which comprises pulling and inserting the suction pipe into the oil pipe. 2. A winding drum rotatably supported in an oil inlet at the base end of the oil pipe, and a winding drum wound around the winding drum,
A suction pipe insertion device into an oil pipe in a gas filling station, comprising: a guide wire having a float fixed to a tip thereof.