JPS6258998B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a device for preventing mix-up of discharged liquids from a multi-chamber tank that individually accommodates different types of liquids.

[Conventional technology]

In a multi-chamber tank in which different types of liquids such as gasoline, kerosene, and light oil are stored and transported individually in each chamber, the discharge operation is performed as follows. As shown in FIG. 1, when the type of liquid to be discharged is kerosene, for example, the operator first confirms that kerosene is stored in the chamber 3B by checking the display board 2 on the top or side of the multi-chamber tank 1, and then An operation handle 4B provided on the chamber 3B is operated, thereby opening and closing a bottom valve 5B to discharge kerosene.

[Problem that the invention seeks to solve]

However, if an operator sometimes misunderstands or operates the operating handle of a chamber containing a liquid different from the desired type, mistakes may occur, such as discharging light oil into a kerosene tank at a gas station. In addition, when loading a multi-chamber tank at a storage base where various liquids are stored, if a different type of liquid is mistakenly loaded into each chamber than what is written on the display board, workers may follow the display board. However, even if the discharge operation is performed correctly, there is a drawback that the type of liquid to be discharged may not be the desired type.

The present invention has been made to solve the above-mentioned problems, and it is possible to avoid misunderstandings and incorrect operations by operators when discharging a desired liquid type from each chamber, and also to It is an object of the present invention to provide a device for preventing mix-up of discharged liquid from a multi-chamber tank, which prevents confusion of liquid types loaded into a multi-chamber tank.

[Means for solving problems]

The present invention is applied to a multi-chamber tank for transportation, in which each chamber individually housing different liquids has a bottom valve for discharge, and a discharge pipe communicating with the bottom valve is provided. These include: an energizing means 14 that is connected to different energizing terminals corresponding to the liquid type provided in each liquid type tank of the liquid storage base; and a manhole opening detection means 30 that detects the opening of a loading manhole in each room. , loading liquid type discriminating means 15 for determining the type of liquid to be loaded from the liquid type tank of the storage base into each chamber of the multi-chamber transport tank by the manhole opening detection means and the energizing means; Loaded liquid type storage means 16 that stores the type of loaded liquid based on the signal from the loaded liquid type determination means; Discharged liquid type designation means 17 through which an operator specifies and inputs the type of discharged liquid at the time of discharge; a bottom valve opening detection means 18 that detects the opening of the bottom valve when the operating handle of the bottom valve is operated by a person; and an emergency shutoff valve 20 that urgently shuts off liquid discharged through the bottom valve in the discharge pipe. The type of liquid being discharged is determined by the loaded liquid type storage means and the bottom valve opening detection means, and when the determined liquid type does not match the liquid type of the discharged liquid type designation means, the emergency shutoff valve is activated. It is also provided with an emergency closing means 21 for closing.

[Operation and effects of the invention]

According to the present invention, when discharging a desired type of liquid from a multi-chamber tank to a stand tank at a transportation destination, the type of liquid specified by the operator is stored in a chamber of a bottom valve opened for discharge. When the liquid types do not match, the open emergency shutoff valve can be automatically closed to prevent discharge of undesired liquid types. Therefore, it is possible to avoid misunderstandings and erroneous operations by the operator when discharging a desired liquid type from each chamber, and there is no confusion in the types of liquid to be loaded into each chamber during loading work.

[Examples] Hereinafter, the present invention will be described in detail based on Examples. FIGS. 2a and 2b show a relay circuit 10 of the device for preventing mix-up of discharged liquids according to the present invention. In the following description of each configuration, components having the same function, such as a bottom valve, in each chamber of the multi-chamber tank 1 will be distinguished by adding suffixes A, B, and C, respectively.

The present invention is installed on a vehicle 11 equipped with a multi-chamber tank 1 shown in FIG. The manhole opening detection means 30 detects the opening of the manholes 23A to 23C in each room shown in FIG. means 14 for determining the type of liquid to be loaded into each chamber of the multi-chamber transport tank 1 from the liquid type tank of the storage base 12 (see FIG. 2a); loading liquid type storage means 16 for storing the type of liquid loaded in the container based on the signal from the loading liquid type determining means 15; a discharged liquid type specifying means 17 for allowing the operator to specify and input the type of discharged liquid at the time of discharge; The operation handles 4A to 4C of the bottom valves 5A to 5C provided in each chamber of the multi-chamber tank 1 are activated by the operation of the bottom valve operation handles by a person.
bottom valve opening detection means 18 (see FIG. 4 a) for detecting the opening of the bottom valves installed in the respective bottom valves, and an emergency shutoff valve for urgently shutting off the liquid discharged through the bottom valve 5 in the discharge pipe 19. 20, the loaded liquid type storage means 16 and the bottom valve opening detection means 18 determine the type of liquid being discharged, and when the determined liquid type and the liquid type in the discharged liquid type designation means 17 do not match, an emergency closing means 21 for closing the emergency shutoff valve;
This is its main structure.

More specifically, the energizing means 14 is a energizing terminal connected to different energizing means 13a to 13c as shown in FIGS. Yes, this is a relay R1~ that operates depending on the energized point.
A signal indicating which type of liquid tank is to be loaded into the multi-chamber tank 1 is outputted to the loading liquid type determining means 15 via R3 (see FIG. 2). The energizing terminals of each liquid type tank are set to conduct at different positions for each tank 12a to 12c, as shown in FIGS. It is now possible to connect as well. Since a predetermined liquid type is always stored in each liquid type tank of the storage base 12, when the energizing means 14 is connected to the energizing terminal on the liquid type tank side, the multi-chamber tank 1 The type of liquid to be loaded into the tank is now determined.

The manhole opening detection means 30 detects the loading manhole 23 of each chamber of the multi-chamber tank 1 shown in FIG. 2a.
The limit switches LmA, LmB, and LmC detect the opening of any of A to 23C, and the normally open contacts l1, l2, and l3, which become normal when they are activated, are
The loading liquid type discriminating means 15, which will be described next, and the plurality of manhole opening detection means 31, which will be described later, are provided respectively.

The loading liquid type determining means 15 is connected to the above-mentioned energizing means 1.
4 and the manhole opening detection means 30, the type of liquid to be loaded into the chamber of the opened manhole is determined. As shown in the figure, the normally open contact l1 is turned on when one manhole, for example 23A, opens, and the normally open contacts l1 to r3 are activated by the relays R1 to R3.
Relays R4 to R6 that operate when any one of the
is provided. Similarly, other normally open contacts l2, l
3 is also provided with relays R7 to R12. That is, normally open contacts r1 to r3 that are activated by any one of relays R1 to R3 that are activated by a pair of contact connections in the energizing means 14, and normally open contacts l1 to l3 that are activated by the limit switch of the opened manhole. A signal is output to the loaded liquid type storage means 16 by relays R4 to R12, which are activated only when both of them are passed.

The loading liquid type storage means 16 receives a signal from the loading liquid type determining means 15 and stores the type of liquid to be loaded and the chamber in which it is stored. Relays R13 to R21 which are operated by normally open contacts and normally closed contacts which are operated by R4 to R12, and a self-holding circuit consisting of normally open contacts r13 to r21 which maintain the operation of the relays are provided. That is, the liquid type and storage chamber determined by the loading liquid type discriminating means 15 are stored, and at the same time, the same signal as the stored signal is output to the loading liquid type display means 24 by actuation of the relays R13 to R21. ing.

Although the loaded liquid type display means 24 is not absolutely necessary, it is necessary, for example, to light up a corresponding lamp so that the operator can confirm what type of liquid is stored in each chamber of the multi-chamber tank 1. It is something. That is, the normally open contacts r13 to r21 operated by the relays R13 to R21 cause the lamps PL1 to PL9 of the display 25 to light up as shown in FIG. 10. In addition, R13 to R2
Needless to say, as long as 1 is self-maintained, the lamp remains lit. The display on the loaded liquid type display means 24 may be displayed by lighting a lamp as described above, or by displaying with letters, colors, or the like.

The discharge liquid type designation means 17 is a push-type discharge liquid type designation button PB provided on the display 25, for example.
Normally open contact p that becomes normal by pressing 1 to PB3
1 to p3, and relay R of loading liquid type storage means 16
Normally closed contact r1 which becomes open by the operation of 13 to R21
3 to r21 are connected to normally open contacts l4 to l6 operated by limit switches LvA to LvC of the bottom valve opening detection means 18, which will be described later, respectively, and the liquid type specified by the operator, the bottom valve opened for discharge, and this Relay R30 that does not operate when the type of liquid does not match the type of liquid stored in the chamber of the opened bottom valve.
~R32. Each circuit is also provided with normally open contacts r30 to r32 for self-holding the relays R30 to R32. This happens when the type of liquid specified by the operator does not match the chamber containing that type of liquid and the opened bottom valve.
It outputs a signal to the emergency closing means 21 to close the emergency shutoff valve 20.

The bottom valve opening detection means 18 is an operation handle 4A of the bottom valves 5A to 5C provided in each chamber of the multi-chamber tank 1.
~ Limit switches installed on each 4C
At LvA to LvC, this limit switch detects the movement of the operating handles 4A to 4C when the bottom valve opens, and operates the normally open contacts 14 to 16 of the discharge liquid type specifying means 17 as described above.

The emergency shutoff valve 20 is for urgently shutting off the liquid discharged through the bottom valve 5 in the discharge pipe 19, as shown in FIG. It is provided. All emergency shutoff valves 20A to 20C are closed via one linkage rod 27 by operating an emergency closing lever 26, as shown in FIG. In addition, this emergency shutoff valve 20 is originally intended to shut off in order to prevent the fire from spreading into each chamber of the multi-chamber tank 1 if a fire occurs while discharging oil-based liquid from the multi-chamber tank 1 to a stand tank. However, not only in such a case, but when used as described in the present invention, if there is any confusion in the discharged liquid, the discharge can be immediately prevented. A bell crank 28 is provided on the linkage rod 27 between each emergency shutoff valve 20 and the emergency closing lever 26, and an emergency closing means 21 described below
The cylinder 28a operated by the solenoid allows the emergency shutoff valve 20 that is open to be closed while the emergency shutoff lever 26 is held in the open position. The bell crank 28 is connected between the bell crank 28 and the emergency closing lever 26.
For example, an absorber 2 with a spring or the like interposed therebetween absorbs the amount of movement of the linkage rod 27 operated by the
9 is installed.

The emergency closing means 21 is connected to the discharge liquid type specifying means 1.
The emergency shutoff valve 2 opens based on the signal of 7.
It outputs a signal that closes 0. That is, the relay R30 in the discharge liquid type specifying means 17
Normally closed contacts r30 to r32 arranged in series are disconnected by the operation of R32, and the bell crank 2 is interposed between the solenoid SOL and the linkage rod 27.
When this solenoid is activated, the cylinder 28a activates the bell crank 28, and the emergency closing lever 2 is activated.
6 is in the open position A, the emergency shutoff valve 20 can be closed while maintaining that position.

In addition to the above configuration, a plurality of manhole opening detection means 31, a bottom valve opening detection means 32 during loading, an alarm means 33 that notifies abnormal conditions detected by these, and a plurality bottom valve opening detection means 34 during discharge are provided. This makes it possible to avoid unnoticed omissions and erroneous operations by workers during loading and unloading operations.

Briefly, multiple manhole opening detection means 31
The normally open contacts l1 to l3 operated by the limit switches LmA to LmC described above are arranged in series in pairs, and are connected in parallel in the required number,
A relay R22 is provided which is activated when any one of these pairs passes. This is done by specifying the loading chamber as the only chamber for the time being, so that the liquid being loaded will not be loaded into any chamber other than the desired chamber, and alarm means 3.
3, so that a warning can be issued in advance.

The bottom valve opening detection means 32 during loading is the limit switch LvA which is the bottom valve opening detection means 18 mentioned above.
A parallel circuit of normally open contacts r4 to r12 operated by the relays R4 to R12 is connected in series to each of the normally open contacts l4 to l6 operated by ~LvC, and when they are connected, one of the relays is activated. R23 to R25 are provided. This is because if the bottom valve of the chamber to be loaded is open, the loaded liquid will flow out, so to avoid this, the operator can be notified of this via the alarm means 33. This is something that is detected in advance.

The alarm means 33 is connected to the two detection means 31 and 3 described above.
2 and a signal from a detection means 34, which will be described next, causes a buzzer BZ provided on a display 25 to sound, and lights lamps PL10 and PL11 to alert the operator.

The plurality of bottom valve opening detection means 34 at the time of discharge has the same configuration as the plurality of manhole opening detection means 31,
Consisting of normally open contacts l4 to l6 operated by limit switches LvA to LvC provided on the operating handles of the bottom valves 5A to 5C, the buzzer of the alarm means 33
This is to generate sound and light up BZ and lamp PL11.

According to the configuration described above, the liquids in each chamber of the multi-chamber tank can be discharged without being mixed up in the following manner. First, the loading work into the multi-chamber tank 1 at the storage base 12 will be described. In order to facilitate understanding, this will be explained in conjunction with the flowcharts shown in FIGS. 5a and 5b.

As shown in FIG.
Place next to a. Then, the energizing means 14 is connected to the energizing terminal 13a provided on the tank (step 1 of the flowchart, hereinafter referred to as S1). In addition, when loading and discharging flammable liquids, static electricity may cause a disaster, so to prevent this, grounding should be provided as required by the Fire Service Act. A ground wire 35 provided in the vehicle and a ground connection port 36 provided in the liquid type tank 12a are connected to the energizing means 14 and the energizing terminals 13a to 13, respectively, together with a ground terminal t5 as shown in FIG. 3a.
By incorporating the contacts t1 to t4 of 3c, the ground wire connection work and the energizing means connection work can be performed at the same time, and the energizing connection can be made with the same number of steps as conventionally required.

When the contacts t1 and t2 of the energizing means 14 are electrically connected, the relay R1 is activated by the electric power supplied from the power source of the vehicle 11 through the contact t1 (S2), thereby causing the loaded liquid type determining means 15 to operate normally. Open contact r1
becomes the norm. In this state, the operator
The manhole 23A of the desired chamber 3A of the multi-chamber tank 1 into which the liquid a is to be loaded is opened (S3). Then, the loading arm 37 (see FIG. 6) is inserted into the manhole 23A. At this time, the limit switch LmA detects that the manhole 23A is open, and the loading liquid type determining means 15
Since the normally open contact l1 of is passed through (S4), relay R4 is activated (S5).

As a result, the normally open contact r4 of the loaded liquid type storage means 16 becomes open. On the other hand, other normally closed contacts r5 and r6
Since the relays R2 and R3 are not connected in the energizing means 14, they do not operate, and therefore the normally open contacts r2 and r3 are kept in the open state by the relays R5 and R6, which are not operated. Then, when the contact r4 is in the open state, the relay R13 is activated (S6). The relay R13 is self-retained by the normally open contact r13 which becomes conductive when the relay is activated, and even if the energizing means 14 disconnects from the energizing terminal 13a of the liquid type tank 12a,
Even after that, the type of liquid to be loaded and the storage chamber are memorized.

Furthermore, this relay makes the normally open contact r13 of the loaded liquid type display means 24 conductive, so the lamp
PL1 lights up (S7), and it is displayed that gasoline is loaded in the corresponding part of the display 25 as shown in FIG. 10, that is, in the first chamber 3A.

Similar to the loading operation described above, when loading from the liquid type tank 12a of the storage base 12 to the second chamber 3B of the multi-chamber tank 1, the connected energizing terminal 13
Contacts t1 and t2 of the current-carrying means 14 are electrically connected by a. Relay R1 is activated, thereby making normally open contact r1 of loaded liquid type determining means 15 conductive. In this state, when the manhole 23B of the desired chamber 3B is opened, the limit switch LmB moves to the manhole 23B.
It is detected that B is open, and the normally open contact l2 of the loaded liquid type determining means 15 is opened. Therefore, relay R7 is activated and loading liquid type storage means 16 is activated.
Normally open contact r7 becomes open and relay R16 is activated. The relay R16 is self-retained by the normally open contact r16 which becomes open when the relay is activated, and the type of liquid to be loaded and the storage chamber are memorized. Furthermore, this relay causes the normally open contact r of the loaded liquid type display means 24 to
16 becomes a pass, so the lamp PL4 lights up.

Similarly, other liquid type tanks 1 of the storage base 12
When carrying out loading work from 2b to the third chamber 3C of the multi-chamber tank 1, contacts t1 and t3 of the current-carrying means 14 are electrically connected by the connected current-carrying terminal 13b.
Relay R2 is activated, thereby opening the normally open contact r2 of the loaded liquid type determining means 15. When the manhole 23C of the desired chamber 3C is opened in this state,
The limit switch LmC detects that the manhole 23C is open and opens the normally open contact l3 of the loading liquid type determining means 15. Therefore, the relay R11 is activated, the normally open contact r11 of the loaded liquid type storage means 16 is opened, and the relay R20 is activated. The relay R20 is self-retained by the normally open contact r20 which becomes open when the relay is activated, and the type of liquid to be loaded and the storage chamber are memorized. Furthermore, this relay connects the normally open contact r20 of the loaded liquid type display means 24.
Since the current is passed, the lamp PL8 lights up.

Similarly, liquid can be loaded one after another from each liquid type tank of the storage base 12 into a desired chamber of the multi-chamber tank 1, and these are stored and displayed in the loaded liquid type storage means and display means. Therefore, as a special case, it is possible to fill all the chambers of the multi-chamber tank 1 with the same type of liquid without any problem.

By the way, when opening a manhole in the multi-chamber tank 1, if you accidentally open two or more manholes, such as by hitting another manhole that has already been opened, you may accidentally move the loading arm 37 into an undesired chamber. In order to avoid this, a warning can be sent to the operator to prevent this from happening. That is, when at least two manholes, for example 23A and 23B, are open (S8), normally open contacts l1 and l2 of the plurality of manhole opening detection means 31 in FIG. 2 are connected, and relay R22 is activated (S9). As a result, the normally open contact r22 of the alarm means 33 becomes open, and the buzzer BZ
sounds (S10) and PL10 lights up (S11). Of course, only one manhole is open.
In this case, the above-mentioned relay is not activated and no alarm is issued (S12, S13, S14).

In addition, the desired chamber of the multi-chamber tank 1 to be loaded,
For example, if the bottom valve 5A of 3A is opened for some reason (S15), the loaded liquid will flow out, so the normally open contact becomes normal by operating the limit switch LvA provided on the operating handle of the bottom valve 5A that is open. 14 (S16), and a relay of the loading liquid type storage means 16 that discriminates between the liquid type tank of the storage base 12 and the chamber in which the manhole is opened, for example, the normally open contact r4 which is made normal by R4 (S5), The relay R23 of the valve opening detection means 32 is activated (S17), and the normally open contact r23 of the alarm means 33 causes the buzzer BZ and lamp PL11 to sound and light up (S10, S18) to alert the worker. It's getting old. Of course, if the bottom valve is closed, there will be no alarm from the alarm means 33 (S19,
S20, S13, S21) is the same as in the case of opening multiple manholes.

In this state, if the lamp 38 shown in FIG. 6 is driven (S22) and the liquid in the liquid type tank 12a is loaded into the vehicle (S23), erroneous operations during loading work are prevented, and the desired liquid type is loaded. can be loaded into the desired chamber. In this way, for example, the first chamber 3
When kerosene, gasoline, and light oil are stored in the A to third chambers 3C, storage in the loading liquid type storage means 16 and lighting of a predetermined lamp on the display 25 are continued until the destination gas station.

When discharging a desired type of liquid from the multi-chamber tank 1 loaded with various liquids into a stand tank such as a gas station, first, the emergency shutoff valve 20 provided under each bottom valve is activated by the emergency closing lever 26. The operator confirms the chamber containing the liquid type using the display 25 mentioned above, opens the bottom valve of that chamber, and then the operator confirms the discharge liquid type provided on the display 25. If, for example, kerosene is specified using the designation button, the desired liquid type, kerosene, can be discharged into the stand tank. To be more specific, as shown in FIG.
In order to discharge the water to a predetermined tank 40c, the emergency shutoff lever 26 is switched from the B position to the A position to open all the emergency shutoff valves 20 (S24). Next, the button PB2 for specifying kerosene, which is the desired liquid type to be discharged, is pressed (S25), and the bottom valve 5A of the chamber 3A containing the desired liquid type is opened using the operating handle 4A (S26).

Since the loaded liquid type storage means 16 stores that kerosene, gasoline, and light oil are stored in the first to third chambers as described above (S27), the discharged liquid type specifying means 17 is normally open. Contacts r14, r16, and r21 are open, and the normally open contact p2 is opened by the discharge liquid type designation button PB2 that was just pressed, and the limit switch LmA of the operating lever 4A of the opened bottom valve 5A is activated. Relay R30 is activated by normally open contact l4 (S28). As a result, the emergency closing means 21
One normally closed contact r30 is disconnected, and the solenoid
SOL does not operate (S29). As a result, the cylinder 28a does not operate, so the linkage rod 27
The emergency shutoff valve 20 is kept open without moving (S30), and the desired liquid is discharged through the discharge hose 42 by opening the discharge source valve 41 of the discharge pipe 19 shown in FIG. 7 (S31). Ejected (S32). Note that even if you let go of the designated button PB2, the normally open contact r
30 to maintain its operation.

During the above-mentioned discharge work, the worker opened the bottom valve 5A, but accidentally pressed the gasoline designation button.
If the bottom valve 5C of the third chamber 3C containing light oil is opened even though PB1 is pressed or the kerosene designation button PB2 is pressed, none of the relays R30 to R32 of the discharge liquid type designation means 17 will operate ( S28). As a result, the normally closed contacts r30 to r32 of the emergency closing means 21 remain open, and the solenoid SOL
is activated (S33). Therefore, cylinder 28
Since point a is activated, the linkage rod 27 moves without the need to close the emergency closing lever 26, all of the emergency shutoff valves 20 are closed (S34), and the discharge is immediately stopped. At this time, the emergency closing lever 26
The absorber 29 attached to the linkage rod 27 connects the linkage rod 27 between the emergency shutoff valve 20 and the absorber 29 so as to maintain the open A position.
The amount of movement is absorbed in order to move only a.
If the operator notices that no liquid is being discharged and operates the discharge liquid type designation button or the opening of the bottom valve correctly (S35), the solenoid SOL is deactivated and the linkage rod 27a closes the emergency shutoff valve 20. It will be restored to open. At this time, the linkage rod 27 is in the state at the beginning of the discharge operation when the emergency shutoff valve 20 is opened by the emergency close lever 26, so that the desired liquid type is discharged.

In addition, for convenience in the above operation, the emergency shutoff valve 2
0 is initially open, but in the above configuration, relays R30 to R32 are
Before operating the emergency shut-off valve 20, that is, when the multi-chamber tank 1 is being transported with the emergency shut-off lever 26 closed, or when the emergency shut-off valve 20 is opened at a gas station, the discharge liquid type designation button is still not activated. When the button is not pressed or the bottom valve is not opened, the relays R30 to R32 of the discharge liquid type specifying means 17 are not operating, so the solenoid SOL is activated and the linkage rod 27a is activated.
moves to close the emergency shutoff valve 20. This is undesirable because the solenoid operates even when it does not need to operate, resulting in unnecessary power consumption. To avoid this, if the emergency closing means 21 is configured as shown in FIG.
The solenoid was activated only after the emergency shutoff lever 26 was opened, the discharge liquid type designation button was pressed, and the bottom valve was opened, leading to operator errors or misunderstandings after discharge preparations began. When the solenoid can be activated.

Briefly, in the emergency closing means 39 replacing the emergency closing means 21, a normally open contact l7 which becomes open when the emergency closing lever 26 is in the open position A;
Parallel normally open contacts l4 to l6 that are open when either bottom valve is opened, and normally open contacts p1 to p3 that are open when the discharge liquid type designation button is pressed.
Relay R33 activated and self-maintained by
A normally open contact r33 is arranged in series,
A relay R34 is provided which is activated when all of these are connected. In this relay 34, a normally open contact r34 and the above-mentioned normally closed contacts r30 to r
The solenoid SOL connected in series with 32 is
It is provided to close the emergency shutoff valve 20. In this way, even if the operation of the discharge liquid type designation button, the operation of opening the bottom valve, and the operation of the emergency shutoff lever 26 for opening the emergency shutoff valve 20 are performed independently in terms of time, the solenoid will not function properly. If you operate it as necessary, you can avoid accidents.

Note that when the bottom valve 5A is opened, if other bottom valves, for example 5C, are also opened, light oil will be discharged along with kerosene.To prevent this, the multiple bottom valve opening detection means 34 at the time of discharge is provided. detects this (S41), and the alarm means 33 can alert the operator (S42, S43).

In the configuration and operation described above, the current supply means 14 may be replaced with a circuit 43 as shown in FIG. That is, the energizing terminals 13 provided in each liquid type tank of the storage base 12 have terminals 13a, 13
Different resistors Ra, Rb, and Rc are interposed for each of b and 13c, and the energizing terminal of the energizing means 14 of the multi-chamber tank 1 is arranged in series with the resistor Ro, and a switch 44 is configured to switch the circuit depending on the difference in voltage generated at point Q. It is interposed between relays R1 to R3.

According to this circuit 43, the current-carrying terminals 13a to 13
Different voltages Va={Ro/(Ro+Ra)}・Vo Vb={Ro/(Ro+Rb)}・Vo Vc={Ro/(Ro+Rc)}・Vo occur at point Q, so depending on these voltages Relays R1 to R3 to be energized by switch 44
Select. The subsequent operations are no different from those described above. According to such a passage circuit 43, the current-carrying means 14 connected to the current-carrying terminal 13 does not require any number of conducting wires as described above, and can use, for example, a shielded wire 45 with one core wire, resulting in a long wire. There is an advantage that the connection wire of the current supply means 14 can be made with a thin wire.

In the above two embodiments, three types of liquids have been described as examples, but if the tank is a multi-chamber tank with two or more chambers,
Needless to say, this method can be applied to all cases where liquids of more than 100% are handled. Furthermore, although the respective operations have been explained using relay circuits, digital ICs such as gate circuits and flip-flops can also be used.

As can be seen from the explanation of the above embodiment, when discharging a desired liquid type from a multi-chamber tank to a stand tank at a destination, the operator specifies the liquid type and the chamber of the bottom valve opened for discharge. When the type of liquid stored in the container does not match the type of liquid contained in the container, the open emergency shutoff valve can be automatically closed to prevent discharge of the undesired liquid type. Therefore, it is possible to avoid misunderstandings and erroneous operations by the operator when discharging a desired liquid type from each chamber, and there is no confusion in the types of liquid to be loaded into each chamber during loading work.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional multi-chamber tank containing different liquids, Figures 2a and b are relay circuit diagrams applied to the device for preventing mix-up of discharged liquids of the present invention, and Figure 3a
- c are examples of the energizing means and energizing terminals, Fig. 4 a is a sectional view of the multi-chamber tank of the present invention, Fig. 4 b is a diagram of the operation mechanism of the emergency shutoff valve, and Figs. 5 a and b are loading and discharging. Flowchart showing the operation at the time, Figure 6 is a loading state diagram into a multi-chamber tank at a storage base, Figure 7 is a diagram showing a discharge state from a multi-chamber tank to a stand tank at a gas station, and Figure 8 is a diagram showing different emergency closures. A circuit diagram of the means, FIG. 9 shows another embodiment of the energizing means and the energizing terminal, and FIG. 10 shows an embodiment of the display body. 1...Multi-chamber tank, 3A~3B...Chamber, 4A~
4C...Operation handle, 5A~5B...Bottom valve, 1
2...Storage base, 12a-12c...Liquid type tank, 13, 13a-13c...Electricity terminal, 14...
... Energizing means, 15 ... Loading liquid type determining means, 16
. . . Loaded liquid type storage means, 17 . . . Discharged liquid type designation means, 18 . ...manhole opening detection means, 40
a~40c...Stand tank, LmA, LmB,
LmC...Limit switch.

Claims (1)

[Scope of Claims] 1. A liquid storage base in a multi-chamber tank for transportation in which each chamber individually housing different liquid types has a bottom valve for discharging, and a discharge pipe communicating with the bottom valve is provided. an energizing means connected to different energizing terminals corresponding to the liquid type provided in each liquid type tank; a manhole opening detection means for detecting the opening of a loading manhole in each room; and the manhole opening detection means. loading liquid type discriminating means for determining the type of liquid to be loaded from the liquid type tank of the storage base into each chamber of the multi-chamber tank for transportation by the above-mentioned energizing means; Loaded liquid type storage means for storing information based on a signal from the loaded liquid type determination means; Discharged liquid type designation means for an operator to designate and input the type of discharged liquid at the time of discharge; and an operation handle for the bottom valve operated by the operator. A bottom valve opening detection means that detects the opening of the bottom valve when activated; an emergency shutoff valve that urgently shuts off liquid discharged through the bottom valve in a discharge pipe; the loaded liquid type storage means and the bottom valve opening detection means. and an emergency closing means for determining the type of liquid being discharged by the means and closing the emergency shutoff valve when the determined liquid type does not match the liquid type of the discharged liquid type specifying means. A device to prevent mix-up of discharged liquid from a multi-chamber tank.