JPS6058395A - Device for making sure connection to ground of tank lorry car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention provides a grounding system for preventing explosions caused by static electricity when supplying gasoline, diesel oil, or other fuel 5I from a tank truck to an underground tank of a gas station. This relates to a device for checking whether ζ has been completely taken.

[Prior art and its problems]

When refueling from an I-Lee vehicle into an underground tank at a gas station, if the tank lorry is charged with static electricity, a spark discharge will occur when connecting the refueling hose to the refueling port, and +iJi will be emitted. There is a risk of igniting the gas and causing an explosion. Therefore, in order to bring the tank truck to zero potential, it is mandatory for safety to connect the ground wire to the ground wire installed on the fire wall of the stand.

However, it is also possible that you forgot to connect the ground, or that the j'-ground wire was connected to the terminal and the ground was not completely connected.

The present inventors previously proposed an apparatus having the following configuration (Japanese Patent Application No. 137477/1982). The outline is as follows: The refueling hose of the tank lorry and the refueling pipe that connects this refueling hose (connected to an underground tank).
An electric circuit is formed between the receiving fitting, the ground wire drawn out from the tank lorry tank, and the wiring connected to the receiving fitting and drawn out. When a refueling vibrator of a different type is connected, a closed circuit is formed to confirm that the same type of oil is connected, and an alarm is issued/1 if a different type of refueling vibrator is connected. This is to prevent oil mixture.

However, with this device, if the refueling hose is connected to the refueling port without connecting the ground wire, the above-mentioned closed circuit will not be formed and an alarm will not be issued, so there is a problem in that it is not possible to confirm whether or not the ground connection has been made. Ta.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a device that emits an alarm (μ) when a refueling bow is connected to a refueling port but a ground wire is not connected, so that an earth confirmation circuit operates correctly. It is something to do.

[Structure of the invention]

In the present invention, a refueling port connection detection switch is provided at the refueling port, so that an alarm is issued when the 7'111 port is connected to the refueling port without a ground wire connected, and the alarm is stopped when the ground wire is connected. It is something.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is an explanatory diagram showing the structure of a gas station according to the present invention, and shows a state in which a tank l:J reel (1) is stopped on the second floor and refueling is being performed. (2) in the figure is the ground wire, (31?1 refueling port, (4
) is the tip of the refueling bow, (5) is the ground F tank (6
), (8) is a ground terminal mounted on the wall, and (9) is an operation panel.

The receiving bracket (5) has a switch 0 as shown in FIG.
0) is attached so that when the end fitting (4) of the oil supply bow (3) is connected to the receiving fitting (5), the flange part pushes down the actuator (10a), thereby closing the contact. It is composed of

With this configuration, when the refueling bow is connected to the refueling port, the contact of switch 00) closes, activating the above-mentioned earth confirmation circuit, and if the earth is not connected, an alarm is issued and the earth is connected. When the oil is removed, an OK lamp is lit and refueling can be started. In addition to the alarm, 1. The ground wire is not connected. It can also be configured to broadcast a message such as "."

FIRST EMBODIMENT> FIG. 3 is a first embodiment showing the electrical configuration of equipment in which an oil mixture prevention device is added together with the earthing confirmation device 6 of the present invention. In this figure, (5-1) to (5-N) are the socket fittings for the oil filler pipes connected to each underground tank, and (10-1)
) to (10-N) are connection detection switches installed at each oil filler port, (11) is a calculation unit built into the operation panel (9), and (
12-1) to (12-N) are selection switches, (13-1
) to (13-N) are earth connection confirmation lamps, (14) is a W alarm generator, and (15) is an OK clamp.

These are arranged on the operation panel (914:).

Next, the operation of this device will be explained. First, connect the ground wire (2) of the tank lorry vehicle fil to the ground terminal (81) to ground the vehicle body.Then, connect the refueling port (3) to the underground tank corresponding to the oil type, for example (5- 1)
and press the selection switch on the operation panel (9), in this example (12-1>).Then, the internal circuit of the calculation unit (11) will switch on the power source - the lighting circuit for the lamps (1, 3-1).
4 Electrical refueling base-ground wire (2+--ground terminal (8
) - ground is formed, and the lamp (13-1
) lights up. In addition, the connection detection switch (1
0 to 1) also close the contact, so select switch (12-1)
), the OK clamp 15) is attached, and it can be confirmed that the refueling hose is connected to Masatomi and that the earth is also completely connected.

If the ground wire (2) is not connected even after pressing the selection switch, not only will the confirmation lamp (+3-1) not light up, but the double alarm (14) will sound, indicating that the ground wire is not connected. Notify the worker that there is no such thing.

Next, if a refueling hose is connected to a lubricant 1 other than the corresponding refueling port, the alarm (14) will issue an alarm because the numbers will not match the selection switch numbers.

Note that it is also possible to configure the alarm device (14) to notify the details of the connection error by voice.

Second Embodiment> FIG. 4 is an electric circuit diagram showing a second embodiment of the present invention, and the same components 813 as in the first embodiment of FIG. 3 are indicated by the same reference numerals. In the figure, (16-1) to (1G-N) are the lubrication I" selection lamps, and (17-]) to (17-N) are the lubrication "I" selection lamps.
J connection lamp, (18) is a bad connection lamp, (1) is a bad earth lamp, (20) is an explosion-proof safety circuit that detects when the earth is securely connected, (21) and (22) are input conversion circuit, (23) is a matching circuit, (24) is a memory circuit, (25) and (2G) are lamp drive circuits, (27)
is the lamp/buzzer drive circuit. In this embodiment, the receiving fittings (5-1) to (5-N) of each oil filler port are connected to a common terminal by a conductive wire and input to an explosion-proof safety circuit.

Next, the operation of this device will be explained. First, when one of the oil filler port selection switch groups (12) is pressed, the corresponding lamp of the oil filler port selection lamp group (16) on the second operation panel lights up. Next, when the 61iI metal fitting (4) at the tip of the lubricating bow (3) is connected to the corresponding bracket of the lubricating port bracket group (5), the contact of the connection detection switch at the connected point closes, and the lubricating port is closed. 1] The corresponding lamp of the connection lamp Bl'1171 lights up. Lubrication D The selection lamp group and the lubrication port connection lamp group correspond to the bottom or left and right sides.
It is possible to match the selection lamp that is already lit. In addition, if the 8-continuation is carried out normally and the grounding is also securely done, the OK lamp (15) lights up in the second case.

If the selected refueling port and the refueling hose to which the refueling hose is connected do not match, the poor connection lamp (18) lights up and the W alarm generator (14) is activated. In addition, the tank lorry vehicle (11 ground wire (2)
'li: Is it not connected to the l child or is the earth loop I? 8 (Explosion-proof safety circuit (20) - holder - refueling hose - tank lorry - vehicle + 11 - ground wire (2) - ground α11.1 child (8) - ◆ explosion-proof safety circuit) is not complete. , the earth fault lamp (19) lights up and the alarm ((Ij light η,, the device (14) is activated.

In this way, dangers due to poor grounding or mixed oil can be prevented.

〔Effect of the invention〕

As described above, according to the present invention, an alarm is issued when the ground wire is not connected or the ground is incomplete, so that it is possible to reliably prevent danger.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the configuration of the present invention, Figure 2 is a side view showing details of the oil supply section, Figure 3 is a circuit diagram showing the electrical configuration of the first embodiment, and Figure 4 is the second embodiment. FIG. 2 is a circuit diagram showing the electrical configuration of the embodiment. (1): Tank truck (2): Ground wire (3): Refueling hose (4) - Tip fitting f51. (5-1) to (5-N): Bracket (6):
Underground tank (7): Oil pipe (8): Earth terminal (9): Operation panel 001, (10-1) to (10-N): Connection detection switch (11): Calculation unit (12-1) to ( 12-N): Selection switch (13-
1) ~ (13-11) : Confirmation lamp (14) : Alarm (15) : OK lamp (16-1) ~ (16-N) : Oil filler port selection lamp (1
7-1) to (17-11): Oil filler connection lamp (18
) : Bad connection lamp (19) : Bad earth lamp (20) : Explosion-proof safety circuit (21), (22) : Input conversion circuit (23) D-coincidence circuit (24) : Memory circuit (25), (26) : Lamp drive circuit (27):
Lamp buzzer drive circuit patent applicant Showa Kiki Kogyo Co., Ltd. Agent Masu Kodo (and 2 others)

Claims (1)

[Scope of Claims] 1. A switch is installed to detect each time the end fitting of a tank lorry's refueling hose is connected to the oil filler port of a tank that stores oil, and when this detection switch is activated,
The ground wire of the tank lorry, the conductive refueling hose of the tank lorry that is in electrical continuity with the ground wire, and the wiring that is electrically connected to the hose to which it is connected are connected to the control panel. A ground connection 61f identification device for a tank [-1-Lee vehicle] characterized by having an earth 61 [recognition circuit] for detecting that a closed loop has been formed.