JPS649239B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a device for preventing oil mixture in tank trucks, tank trailers, etc. The purpose of this is to prevent oil, etc. from being inadvertently mixed during loading or unloading.

[Conventional technology]

The interior of a typical tank truck is divided into multiple tanks, and each tank can store different types of liquids, such as gasoline, kerosene, and light oil, and can simultaneously transport them to storage tanks at gas stations, etc. There is.

[Problem to be solved by the invention]

In this case, the desired liquid is unloaded at the destination. It is difficult for workers to identify from the outside which liquid is stored in each tank, and workers may unload liquid that is not stored in the storage tank due to a misunderstanding. There have been problems such as unloading different types of liquids at the same time, and some combinations of liquids can be very dangerous.

[Means for Solving the Problems] The present invention was made with the intention of solving the above problem, and the type of oil loaded is stored in the tank number/liquid type storage unit at the time of loading, and the type of oil is stored at the time of unloading. A function that prevents the bottom valve handle from being operated unless the tank number and liquid type stored in the tank number-liquid type storage unit are checked in the correct manner when opening and closing the bottom valves installed in each tank. each tank display means having;
By providing means for displaying each liquid type that can be stored in each tank, a tank number/liquid type storage unit that memorably displays a corresponding combination of these two means, a bottom valve handle locking device, and a control device. , it is possible to easily judge or identify which liquid should be stored in the tank tank from the outside of the tank truck, etc., and which liquid is stored in each tank. Moreover, each tank display means can be displayed at the time of unloading. It is possible to perform the opening operation of the corresponding bottom valve while checking, which prevents unloading of mixed oil or a liquid different from the desired liquid, and ensures reliable loading and unloading. The purpose of the present invention is to provide a device for preventing oil mixture in tank trucks and the like.

〔composition〕

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

FIG. 1 is a side view of a tank lorry having an oil mixture prevention device according to the present invention. A tank 2 installed on a chassis 1 is divided into, for example, three tanks 3a, 3b, and 3c. liquids such as leaded gasoline, unleaded gasoline, kerosene or diesel oil. In this case, each tank 3a,
Bottom valves 4a, 4b, 3b, 3c are provided at the bottom, respectively.
4c is arranged, and each bottom valve 4a, 4b, 4c is connected to a discharge pipe 6 via a pipe 5 (see Fig. 2),
It is possible to unload cargo from this discharge pipe 6.

At the top of each tank 3a, 3b, 3c, each bottom valve 4a, 4
Bottom valve handle 20a for opening and closing b, 4c,
20b and 20c are provided, which are connected to the compressed air source 2.
3. Covered by bottom valve handle covers 21a, 21b, 21c driven by electromagnetic valves 16a, 16b, 16c and locking cylinders 22a, 22b, 22c (see FIG. 11).

Furthermore, an operation panel 7 that constitutes the oil mixture prevention device of the present invention is attached to the side surface of the tank 2. In this case, on this operation panel 7, a tank number display section 8, which is a means for displaying each tank, and a liquid type display section 9, which is a means for displaying each type of liquid that can be stored in each tank, are arranged in orthogonal coordinates to each other. The tank number display section 8 and each liquid type display section 9 are arranged on a vertical axis or a horizontal axis so as to
A tank number/liquid type storage section 10 is formed at each corresponding position, and each of these tank number display section 8 and each liquid type display section 9 has a self-resetting push button switch (illuminated type), and The tank number/liquid type storage section 10 uses a self-holding push button switch (illuminated type) that also serves as a storage device.

Further, the tank number/liquid type storage unit 10 has a storage function as described above, and after storing the storage of liquid in a predetermined tank 3a, 3b, 3c, the reset button 11 is pressed.
When the power switch 12 (illuminated type) is turned on again, the liquid type storage state in each tank is displayed.

The tank number/liquid type storage unit 10 is formed inside a cover 13 that can be opened and closed on the operation panel 7, and the surface of the operation panel 7 other than the cover 13 is equipped with alarms in addition to the above-mentioned devices. A lamp 14 and a bottom valve lock release lamp 15 are installed, and an alarm buzzer 14' is attached to the side of the alarm lamp 14.

To perform a memory operation when loading oil on the operation panel 7 configured as described above, first turn on the power switch 12, then open the cover 13 (the cover disposed inside the cover). The open switch 24 is activated, the bottom valve lock release lamp 15 lights up, the solenoid valve is opened at the same time, the bottom valve handle covers 21a, 21b, 21c are opened, and the bottom valve handles 20a, 20b, 20c are operated to release the bottom valve. valve 4a,
4b, 4c are closed) Predetermined tank number-button of the liquid type storage unit 10, for example, the first tank 3
Turn on G ₁ corresponding to a and leaded gasoline, L ₂ corresponding to the second tank 3b and light oil, and G ₃ corresponding to the third tank 3c and leaded gasoline, and turn on the cover 13.
After closing the door, operate the reset button 11 to turn off all the lights and complete the loading operation (see Figure 4).
Then, when unloading the load, when the power switch 12 is turned on, the buttons G ₁ , L ₂ and G ₃ are memorized and can be lit.

Further, the push button switches for the liquid type display section 9 and the tank number display section 8, for example, in the control device shown in FIG.
If it is determined that the oil mixture is not mixed by turning on each of the switches 8a, 8b, and _8c , the relays X ₇ , X ₈ , and By exciting the solenoid valve 16a, 16b or 16c of the corresponding bottom valve opening/closing device, the bottom valve 4a, 4b or 4c can be opened.

In FIG. 5, X ₁ to X ₁₄ are respectively a power switch 12, a bottom valve lock release lamp 15, a push button switch of a tank number/liquid type storage unit 10 connected in parallel for each tank, and an alarm lamp 14. Buzzer 1
X ₁ a to X ₁₄ a are A contacts of relays X 1 to X 14, and _{X 2 b} and _{X 7 b} are B contacts of relays X ₂ and X ₇ . It is a point of contact. Further, 17 is a power supply side connection terminal.

Next, the operating mode of the oil mixture prevention device of the present invention during unloading will be explained with reference to the block diagram shown in FIG.

In Fig. 6, the left half shows the case of normal operation, and the right half shows the case of incorrect operation. First, when performing normal operation, turn off the power switch 12.
By turning ON, the pushbutton switches G ₁ , L ₂ , and G ₃ light up due to the memory function described above, so that the predetermined liquid, for example leaded gasoline in the first tank 3a and third tank 3c, is turned on. To unload, press the pushbutton switch 9a that displays leaded gasoline on each liquid type display section 9, then press the tank number pushbutton switch for the first tank 3a and third tank 3c that contain leaded gasoline. If you press 8a and 8c, the first tank 3a and the third tank 3
The bottom valves 4a and 4c of tank c are opened, and the leaded gasoline in the first tank 3a and the third tank 3c can be unloaded to a predetermined location at the same time. After unloading the predetermined liquid in this way, the cover 13 is opened (at this time, the bottom valve lock release lamp 15 lights up)
Then, pushbutton switches G ₁ and G ₃ are turned OFF, cover 13 is closed again, and reset button 11 is operated to complete the unloading operation.

During unloading work, after turning on power switch 12, even if push button switch 8a is pressed by mistake, the light does not turn on. In addition, if you accidentally press pushbutton switch 9b for unleaded gasoline and pushbutton switch 8a instead of pushbutton switch 9a for leaded gasoline, the mixed oil detection circuit in the electric circuit shown in FIG. Since this causes a short circuit, the alarm lamp 14 lights up and the alarm buzzer 14' sounds at the same time, informing the worker of the danger of mixed oil. In this case, operate the reset button 11 and operate the power switch 13 again to perform normal operation. Additionally, if a pushbutton switch with a display different from the memory display is operated during unloading, the mixed oil detection circuit will short-circuit and alert the operator of the danger of mixed oil, preventing the worker from operating the product incorrectly. There is no need to unload the cargo while it is in progress, and the unloading work can always be carried out normally.

〔Effect of the invention〕

As explained above, according to the oil mixture prevention device of the present invention, when unloading the bottom valve of each tank, the tank number and liquid type stored in the tank number-liquid type storage section are used. display means for each tank that has a function that makes it impossible to operate the bottom valve opening/closing device unless it is checked in the correct manner, and means for displaying each type of liquid that can be loaded in each tank, and both of these means. Since the tank has a memorizable tank number-liquid type storage section that displays the corresponding combination of At the time of unloading, the liquid in each tank and the tank number are operated according to the memorized instruction display of each display means, and in the event of an abnormal operation, an alarm means is used to notify the danger of a mixed oil condition, so that normal operation is always maintained. Excellent effects such as being able to load and unload cargo without mixing oil can be obtained, and its utility value is remarkable.

Also, leaded gasoline, unleaded gasoline or kerosene,
Light oils have similar physical and chemical properties, making it difficult to accurately classify them; however, in this invention, the type of oil is entered manually, allowing reliable discrimination.

Furthermore, since the liquid type and tank number are instructed separately at the time of unloading, it is consistent with the conventional way of thinking of workers, that is, ``first decide on the liquid type, then check the quantity, and then decide on the tank number to unload.'' This also has the effect of ensuring normal operation.

In the above embodiment, a case with three tanks has been described, but it goes without saying that the same method can be applied to a plurality of tank trucks, tank trailers, etc. other than three tanks, and the same effect can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tank lorry having an oil mixture prevention device of the present invention, Fig. 2 is a plan view showing the piping state of the bottom valve of the tank lorry, and Fig. 3 is a perspective view showing an example of the operation panel of the invention. Fig. 4 is a block diagram showing the operating procedure during loading work in this invention, Fig. 5 is an electric circuit diagram showing an example of the control device in this invention, and Fig. 6 shows the procedure during unloading work in this invention. FIG. 7 is a layout diagram showing the bottom valve handle locking device. In the figure, 2...tank, 3a to 3c...
Tank, 4a-4c...bottom valve, 7...operation panel, 8...
Tank number display section (each tank display means), 9...each liquid type display section (each liquid type display means), 10...tank number-liquid type storage section, 11...reset button, 12...power switch, 14...Alarm lamp, 14'...Alarm buzzer, 16a-16c...Solenoid valve, 20a-2
0c...bottom valve handle, 21a-21c...bottom valve handle cover, 22a-22c...locking cylinder, 23...compressed air source.

Claims (1)

[Scope of Claims] 1. It is mounted on a tank truck, tank trailer, etc., which comprises a tank divided into a plurality of tanks and a bottom valve is provided at the bottom of each tank, (1) an illuminated self-holding switch or a memory circuit during loading; A tank number/liquid type storage section that memorizes and displays the loaded oil type and tank number using an illuminated self-resetting switch, etc., and releases the memory when unloading. (2) Each liquid type display section that specifies and displays the oil type using an illuminated self-resetting switch with a memory circuit (when the power is cut off, the memory is cut off) when unloading, and a tank number display that allows you to manually specify and display the tank number. Department. (3) The tank number display section and each liquid type display section are arranged on the vertical and horizontal axes to form orthogonal coordinates, and the tank number-liquid type storage section is placed at the corresponding position of the tank number and liquid type. Cartesian coordinate system placed in a matrix. (4) The bottom valve handle is fixed or covered with a cover, etc. to prevent operation of each bottom valve opening/closing device, and the bottom valve handle is electrically controlled using a pneumatic cylinder or hydraulic cylinder for operation. Locking device. (5) Compare the loading memory and the specification at the time of unloading,
Tank lorries, tank trailers, etc. characterized by comprising a control device that releases a bottom valve handle locking device to enable operation of the bottom valve if they match, and displays a mixed oil or issues an alarm if they do not match. Oil mixture prevention device.