JPS62193998A - Oil-mixing preventive device - 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 [Field of Industrial Application] The present invention relates to an oil mixture prevention device that prevents oils of different types from being supplied from a tank lorry to a storage tank at a gas station.

[Conventional technology]

Conventionally, in order to prevent the wrong type of oil from being supplied from a tanker truck to a storage tank at a filling station, a joint pointing and shouting between the tanker truck driver and the filling station manager has been carried out prior to refueling. There is. However, since it relies on human attention, there is a high possibility of oil mixing accidents due to incorrect operation.

In Japanese Patent Application No. 60-146491, a key for opening and closing a fuel filler port at a gas station is connected to an oil type plug corresponding to the oil type at the fuel filler port, and the oil type at the fuel filler port is changed using this oil type plug as a medium. Detected.

[Problems to be Solved by the Invention] However, since the type of oil to be unloaded from a tank lorry is manually set or detected in the control unit, it has been insufficient to eliminate human errors.

An object of the present invention is to provide an oil mixture prevention device that can prevent oil mixture accidents caused by human error and ensure safety.

[Means for solving problems]

The oil mixture prevention device according to the present invention has an oil type plug that corresponds to the oil type in the storage tank of the gas station.

A light transmitting part is installed in a discharge passage that leads oil from the bottom to a discharge valve at the bottom of a tank chamber of a tank lorry vehicle, and allows light to cross the discharge passage, and a light transmitting part that transmits light when oil is present or absent in the discharge passage. A transmittance detection means detects the ratio of the amount of transmitted light in the part as transmittance, and the type of oil in the discharge passage and the oil are determined by comparing the output of this transmittance detection means with a reference value related to the oil type corresponding to the oil type plug. A determining means for determining whether or not the oil type corresponding to the seed plug matches, and a lock control for unlocking the closed state of the discharge valve if the determining means determines that they match. and means.

[Effect]

Since the amount of transmitted light changes depending on the type of oil, the ratio of the amount of transmitted light in the light transmitting section when oil is present in the discharge passage and when there is no oil, that is, the transmittance, is related to the type of oil. Therefore, by comparing this transmittance with a reference value related to the oil type corresponding to the oil type plug, the type of oil present in the discharge passage can be determined. Furthermore, when the detected transmittance value does not match the above-mentioned reference value for any oil type, by displaying that the oil type cannot be determined, it becomes possible to correctly identify only normal oils. The lock control means unlocks the closed state of the discharge valve when the type of oil in the discharge passage and the type of oil corresponding to the oil type plug match, and thereby locks the closed state of the discharge valve to the oil filler port corresponding to the oil type plug. Refueling from tanker trucks becomes possible.

〔Effect of the invention〕

Since both the type of oil at the refueling port to be filled at a gas station and the type of oil unloaded from a tanker truck are detected without relying on human attention, oil mixture accidents due to single human error can be eliminated. I can do it. In detecting the type of oil to be unloaded from a tank truck, sufficient safety can be achieved by simply transmitting light through the oil and the electric means can be placed sufficiently away from the oil. Furthermore, since the transmittance is used as a parameter instead of simply the amount of transmitted light, it is possible to eliminate the influence of fluctuations in the optical system on oil type detection.

〔Example〕

The present invention will be described below with reference to an embodiment shown in the drawing.

In FIG. 2, underground in the gas station 10, there are storage tanks 12 for each type of oil, such as gasoline, diesel oil, and kerosene.
a, L2b, 12c are provided, and oil filler ports 14a, 14
b and 14c are underground storage tanks 12a and 12b, respectively, which are arranged at or near the ground.

It leads to 12C. Each fuel filler port 14a, 14b, 14c
are closed by the caps 18a, 18b, 18c except when oil is being supplied from the tank truck 16, and each cap 18a, 18b, 18c has a lock 20a, 2
0b and 20c are multiplied.

In the office 21 of the gas station 10, there is a key chain 22a.

22b and 22c are stored, and each key chain 22a
.

Each lock 20a, 20b, 20 is in 22b, 22c.
An oil type plug 26 is attached together with a key 24 corresponding to c.

In this embodiment, the tank 28 of the tank truck 16 is divided into three tank chambers 30a, 30b, and 30c.
Hatches 31a, 31b, 31c and bottom portions 32a, 32b are provided at the top and bottom of each tank chamber 30a, 30b, 30c.

32c are arranged respectively, and each tank chamber 30a, 3
0b.

30c is connected to a common discharge passage 34 via bottom portions 32a, 32b, and 32c, and a discharge valve 36 is disposed at the outlet of the discharge passage 34. Each bottom 32a, 32b, 32c has a bottom handle 37a, 37b at the top of the tank 28.
, 37c. The control device 38 is the cab 4
The light transmitting portion 42 is disposed at an arbitrary location such as on the rear side of the discharge passage 34 . When refueling, ground [
44 connects the tank lorry vehicle 16 to ground, and a hose 46 connects the outlet side of the discharge valve 36 to a predetermined fuel fill port.

Figure 1 shows the main part of this invention, and shows the light 111X5
The light beyond 0 is sent to the light transmitting section 42 via the optical fiber 52, and the light that has crossed the discharge passage 34 in the light transmitting section 42 is sent to the optical sensor 56 via the optical fiber 54. The oil type detection means 58 of the oil type plug 26 detects the oil type corresponding to the oil type plug 26 from the groove position of the oil type plug 26. The microcomputer 60 includes the optical sensor 56 and the oil type detection means 5.
Based on the input from 8, the switching valve 62, printer 64° indicator lamp 66, and alarm 68 are controlled. Switching valve 62
controls the supply of pressurized air from the pressure source 70 to the discharge valve 36 and the discharge of pressurized air from the discharge valve 36 . Note that instead of the printer 62, other recording devices such as a memory element or a floppy disk may be used to record the oil type determination results.

FIG. 3 is a detailed view of the panel section 72 of the control device 38.

The oil type plug 26 is inserted into the hole 74.

The fuel station lamp 76 indicating the oil type A to C corresponding to the inserted oil type plug 26 lights up. Also.

Discharge passage 3 detected by microcomputer 60
The low lamp 78 indicating the type of oil A-C in No. 4 lights up, and if the type of oil in the discharge passage 34 cannot be detected, the lamp 8 lights up.
0 lights up. When the oil types at both the filling station and the lorry match, the "unlock" indicator lamp 66 lights up, and when the oil types in both cars are different, the "mixed oil" indicator lamp 66 lights up and the alarm 68 sounds. . The control device 38 may be powered on when the oil type plug 26 is inserted into the hole 74, and a flashing lamp, audio display, etc. may be used instead of the alarm 68.

FIG. 4 is a detailed view of the discharge valve 36. The discharge valve 36 has a lever 86 that operates a plug 84.

A hole 88 is bored at one location in the circumferential direction of the plug 84 . The lock piece 90 is connected to the plug 8 by a compression coil spring 92.
4, the hole 88 connects to the switching valve 6 through the passage 94.
Pressurized air is supplied from 2.

When the discharge valve 36 is in the closed position, the lock piece 90 is in the hole 88.
When inserted into the lever 8, the discharge valve 36 is locked.
It is difficult to rotate the plug 84 by the operation 6, that is, to switch from the closed position to the open position. At this time, the switching valve 6
2 to the hole 8B, the lock piece 90
is forced out of the hole 88 by pressurized air against the spring 92, thereby releasing the lock and allowing the discharge valve 36 to open. When the discharge valve 36 is changed from the open position to the closed position, the discharge valve 36 is placed in the closed position, and as the pressurized air is released to the atmosphere, the lock piece 90 is inserted into the hole 88 and locked.

FIG. 5 is a flowchart of a program for detecting the type of oil in the discharge passage 34. One of the bottom sections 32a to 32c corresponding to the type of oil to be unloaded from the tank truck 16 is opened, and the amount of transmitted light in the light transmitting section 42 is measured before the oil is introduced into the discharge passage 34 (step 98).
. After that, when any of the bottom parts 32a to 32c is opened, oil is introduced into the discharge passage 34. Then, the amount of transmitted light changes, and the inflow of oil is detected. When the amount of transmitted light ceases to fluctuate, that is, when the light transmitting section 42 is completely filled with oil, the amount of transmitted light is measured again (step 102), and the measured amount of transmitted light is compared with the case when no oil is present in the light transmitting section 42. The ratio to the amount of transmitted light in the light transmitting section 42 is calculated as transmittance (step 104). Since the amount of transmitted light varies depending on the oil type, the transmittance also varies depending on the oil type, and the oil type can be detected based on the transmittance. The permeability of each oil type is set in advance as a reference value, and by comparing the calculated permeability with the reference value (step 106), the oil type of the discharge passage 34 is determined (step 108). If the calculated transmittance is within a predetermined range from the reference value, it can be determined that the oil type corresponds to the reference value. If the above-mentioned transmittance does not fall within the predetermined range of any reference value, an indication that the oil type cannot be determined is displayed and the discharge valve is kept locked.

Furthermore, since the transmittance is not affected by fluctuations in the optical system, it is possible to eliminate these influences and accurately detect the oil type.

FIG. 6 is a procedural diagram of the refueling operation. Tank truck 16
When the vehicle stops, the engine of the tanker truck 16 is stopped (step 114).

Connect the ground wire 44 (step 116), tank 2
8 hatches 31a to 31c, that is, the tank chamber 30
Check the oil type and quantity for each step 11 from a to 30c.
8) Check that each bottom portion 32a to 32c is closed (Step 120); Check the inventory amount of each tank chamber 30a to 30c (Step 122). Next, a meeting is held regarding the unloading procedure (step 124).

Unlock the lock 20a, 20b, or 20c of the oil filler port 14a, 14b, or 14c to be refueled using the corresponding key 24 (Step 126), and insert the oil type plug 26 connected to the key 24 into the hole 74 of the panel portion 72. (Step 128), oil filler ports 1'la, 14b
Alternatively, connect the hose 46 between 14c and the discharge valve 36 (Step 130), and connect the bottom portions 32a, 32 corresponding to the oil type.
b or 32c (step 132). On the other hand, by inserting the oil type plug 26 into the hole 74 of the panel portion 72.

Power is input to the control device 38 (step 134), the oil type in the filling station storage tank 12a, 12b, or 12c is determined by the oil type plug 26 (step 136), and unloading is performed based on the flowchart in FIG. 5 described above. The type of oil is determined (step 138), and it is determined whether the two oil types match (step 140). If they do not match, it is determined that the oils are mixed (step 142), an alarm is generated (step 144), and the discharge valve 36 is kept locked. If they match, the discharge valve 36 is manually unlocked (
Step 146) and open the discharge valve 36 (Step 14).
8) Finish unloading (step 150) and check for residual oil in the hatch 31a, 31b or 31c, that is, in the tank chamber 30a, 30b or 30c of the tank 28.Step 152), remove the bottom 32a, 32b or 32c. close (step 154), and close the discharge valve 36 (step 15B).

Remove the hose 46 (step 15B), panel section 72
When the oil type plug 26 is removed from the hole 74, the power to the control device 38 is turned off (step 160). Next, the fuel filler port 14a,
14b or 14c is locked (step 162)
, the inventory level of the underground tank 12a, 12b, or 12c is confirmed (step 164), the ground wire 44 is removed (step 166), the tank truck 16 departs (step 16g), and a plurality of types of oil are unloaded. If so, steps 122 to 164 are repeated. Further, since steps 134 to 146 are automatically executed by the control device 38, only steps 128 and 160 are added to the conventional operations according to the present invention. Since power cannot be input to the control bag @38 unless the oil type plug 26 is inserted,
That is, the switching valve 62 is operated and the discharge valve 36 is not unlocked from the closed position.

It is possible to prevent the discharge valve 36 from being opened before it is determined that the oil types match. A light transmitting portion 4 is provided in the discharge passage 34.
2, the electrical means can be located far away from the oil, improving safety.

In the above embodiment, the case is shown in which there are three tank chambers of a tank truck, three storage tanks at a gas station, and three types of oil to be discriminated, but any number of these may be one or more. The present invention is applicable.

Also, the case where the discharge passage is common is shown.

This can also be applied to tanker trucks having one or more arbitrary number of discharge passages.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the main parts of an embodiment of the present invention, Fig. 2 is a general schematic diagram of the embodiment, Fig. 3 is a diagram showing a panel section of a control device, Fig. 4 is a detailed diagram of a discharge valve, FIG. 5 is a flowchart of a program for detecting the type of oil in the discharge passage, and FIG. 6 is a flow chart of the oil supply operation. 10 Gas station 12a, 12b, 12c storage tank 16
Tank lorry vehicle 26 Oil type plug 28 Tanks 30a, 30b, 30c tank chambers 32a, 32
b, 32c bottom 34 discharge passage 36 discharge valve 38 control device (transmittance detection means, determination means)

Claims (4)

[Claims] (1) An oil type plug corresponding to the oil type in the storage tank of the gas station and a discharge passage that leads oil from the bottom of the tank chamber of the tank lorry to the discharge valve, and light crosses the discharge passage. a light transmitting section, a transmittance detecting means for detecting the ratio of the amount of transmitted light in the light transmitting section when oil is present and absent in the discharge passage as a transmittance, and an output of the transmittance detecting means and the oil. a determining means for determining whether or not the type of oil in the discharge passage matches the type of oil corresponding to the oil type plug based on a comparison with a reference value related to the type of oil corresponding to the type plug; and this determining means and lock control means for unlocking the closed state of the discharge valve when it is determined that the discharge valves match. (2) The determination means determines that the type of oil in the discharge passage matches the type of oil corresponding to the oil type plug when the output of the transmittance detection means is within a predetermined range with respect to the reference value. The oil mixture prevention device according to claim 1, which determines that: (3) In order to detect transmittance, we equipped a device that automatically detects the inflow of oil into the light transmitting section based on changes in the amount of transmitted light, and also automated the measurement of the amount of transmitted light before the inflow and the amount of transmitted light after the inflow. An oil mixture prevention device according to claim 1, which automates oil type discrimination. (4) If the permeability of the tank truck does not fall within the standard value range for the permeability of all oil types corresponding to the oil type plug, it will display that the oil type cannot be determined and keep the discharge valve locked. An oil mixture prevention device according to claim 1.