JPS6258999B2 - - 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 Kerosene is discharged by operating an operating handle 4B provided on the chamber 3B, thereby opening a bottom valve 5B that opens and closes.

[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 liquid types has a bottom valve for discharging, and a discharge pipe communicating with the bottom valve is provided, and the present invention is characterized by: However, the energizing means 16 connected to different energizing terminals corresponding to the liquid type provided in each liquid type tank at the liquid storage base and each stand tank at the destination of transportation, and the opening of the loading manhole in each room are required. A manhole opening detection means 48 to detect, and loading liquid type discrimination 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. means 17; loading liquid type storage means 18 for storing the type of liquid loaded in each chamber based on the signal from the loading liquid type determining means; and loading operation at the storage base and discharge operation at the gas station. A loading/discharging selection means 19 which is switched at the same time and separates the operation of the loading liquid type discriminating means and the contained liquid type discriminating means; contained liquid type discrimination means 20 for determining the type of liquid contained in each stand tank to be transported; bottom valve opening detection means 21 for detecting the opening of the bottom valve by the operation of the operation handle of the bottom valve by the operator; An emergency shutoff valve 23 that urgently shuts off the liquid discharged through the bottom valve in the discharge pipe, and the loaded liquid type storage means and the stored liquid type discrimination means determine the type of liquid being discharged, and the liquid type is discriminated. A device for preventing mix-up of discharged liquids for a multi-chamber tank, characterized in that it comprises an emergency closing means 24 for closing the emergency shutoff valve when the liquid type and the liquid type of the discharged liquid type designating means do not match.

[Operation and effects of the invention]

According to the present invention, when discharging a desired liquid type from a multi-chamber tank to a stand tank as a transportation destination, the type of liquid stored in the stand tank and the type of liquid stored in a chamber of a bottom valve opened for discharge are provided. When these 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 loaded into each chamber during loading work.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof. Figures 2 (Part 1) and (Part 2) are
1 is a relay circuit 10 of a 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. ) different energizing terminals 14, 15 provided for each stand tank.
The energizing means 16 (see Fig. 2 (Part 1)) connected to the manhole 25A of each room shown in Fig. 4 a
The manhole opening detection means 48 detects the opening of ~25C, and the manhole opening detection means 48 and the energizing means 16 detect the type of liquid to be loaded from the liquid type tank at the storage base into each chamber of the multi-chamber transport tank. A loading liquid type discriminating means 17 that discriminates, and a loading liquid type storage means 18 that stores the type of liquid loaded in each chamber based on a signal from the loading liquid type determining means 17.
and is switched during loading operations at storage bases and during discharging operations at gas stations.
By switching the loading/discharging selection means 19 which separates the operation of the loading liquid type discriminating means 17 and the stored liquid type discriminating means 20, the loading/discharging selecting means 19 can be used to determine the location of the destination by the signal from the energizing means 16. The stored liquid type discriminating means 20 determines the stored liquid type in each stand tank, and the bottom valve opening detection means 21 detects the opening of the bottom valve by operating the operating handle of the bottom valve 5 by an operator's operation (Fig. 4). a), an emergency shutoff valve 23 that urgently shuts off the liquid discharged via the bottom valve 5 in the discharge pipe 22, a loaded liquid type storage means 18, and a stored liquid type determination means 20. Its main structure includes an emergency closing means 24 that discriminates the type of liquid and closes the emergency shutoff valve when the discriminated liquid type and the liquid type stored in the opened bottom valve chamber do not match. There is.

To be more specific, the energizing means 16 connects different energizing terminals, for example, as shown in FIGS. 14a to 14c and 15a to 15c, which are energized through relays R1 to R3 (see Fig. 2) that operate according to the energized points.
A device that outputs a signal indicating what type of liquid tank is to be loaded into the multi-chamber tank 1 and the type of liquid stored in the stand tank to the loaded liquid type determining means 17 and the stored liquid type determining means 20. It is. In addition, the energizing terminals of each liquid type tank are connected to the tanks 12a to 12c, 13 as shown in Fig. 3 a to c.
Conductivity is established at different positions for each of a to 13c, and the energizing terminal on the energizing means 16 side can be connected to the energizing terminal of any tank. Since a predetermined liquid type is always stored in each liquid type tank of the storage base 12 and in each stand tank of the gas station 13, the energizing means 16 is connected to the energizing terminals on the liquid type tank side and the stand tank side. When connected, the type of liquid to be loaded into the multi-chamber tank 1 and the type of liquid to be discharged are uniquely determined.

The loading liquid type determining means 17 determines the type of liquid to be loaded into the opened manhole chamber based on the signal from the energizing means 16 and the signal from the manhole opening detection means 48. As shown in the figure, the normally open contact l1 is activated when one manhole, for example 25A, is open, and the normally open contact l1 is activated when any of the normally open contacts r1 to r3 activated by the relays R1 to R3 is activated. Relays R4 to R6 are provided. Similarly, other normally open contacts l2, l3
Relays R7 to R12 are also provided for the relays R7 to R12. That is, the normally open contacts r1 to r3 are activated by any one of the relays R1 to R3 that are activated by a pair of contact connections in the energizing means 16, and the normally open contacts l1 to l3 are activated by the limit switch of the opened manhole. A signal is output to the loading liquid type storage means 18 by relays R4 to R12, which operate only when both are in the flow state.

The loading liquid type storage means 18 stores the type of liquid to be loaded and the chamber in which it is stored in response to a signal from the loading liquid type determining means 17, and relay R4 provided in the loading liquid type determining means 17 There are provided relays R13 to R21 which are operated by normally open contacts and normally closed contacts which are operated by R12, and a self-holding circuit consisting of normally open contacts r13 to r21 which maintain the operation of the relays. That is, the liquid type and storage chamber determined by the loading liquid type discriminating means 17 are stored, and at the same time, the same signal as the stored signal is output to the loading liquid type display means 26 by actuation of the relays R13 to R21. ing.

Although the loaded liquid type display means 26 is not absolutely necessary, it is necessary, for example, to light a corresponding lamp so that the operator can confirm what kind 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 27 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 in the loading liquid type display means 26 may be displayed by lighting a lamp as described above, or by displaying in letters, colors, or the like.

The stored liquid type discriminating means 20 includes normally open contacts r1 to r3 that are operated by switching the loading/discharging selecting means 19 described below, and a relay R2 for each of the normally open contacts r1 to r3.
6 to R28 are interposed to light up the lamps PL12 to PL14 of the stored liquid type display means 28 and output a signal to the emergency closing means 24.

Although the stored liquid type display means 28 is not always necessary, it is necessary to, for example, turn on a corresponding lamp so that the operator can confirm what type of liquid is stored in each tank of the stand tank 13. It is. That is, the relay R26~
The normally open contacts r26 to r28 operated by R28 turn on the lamp PL1 of the display 27 as shown in FIG.
2 to PL14 are now lit.

The loading/discharging selection means 19 is switched during loading work at the storage base 12 and during discharging work at the gas station 13, and separates the respective operations of the discriminating means 17, 20 and the detecting means 33, 34, which will be described later. be.

The bottom valve opening detection means 21 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 emergency closing means 24 as described above.

The emergency shutoff valve 23 is for urgently shutting off the liquid discharged through the bottom valve 5 in the discharge pipe 22, as shown in FIG. It is provided. All emergency shutoff valves 23A to 23C are closed via one linkage rod 30 by operating an emergency closing lever 29, as shown in FIG. In addition, this emergency shutoff valve 23 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. The linkage rod 30 is provided with a bell crank 31 between each emergency shutoff valve 23 and the emergency closing lever 29, and an emergency closing means 24 described below is provided.
The cylinder 31a operated by the solenoid allows the emergency shutoff valve 23 to be closed while the emergency shutoff lever 29 is held in the open position. This includes an absorber 32 interposed between the bell crank 31 and the emergency closing lever 29, such as a spring, which absorbs the amount of movement of the linkage rod 30 operated by the bell crank 31.
This is achieved by installing the

The emergency closing means 24 outputs a signal to close the opened emergency shutoff valve 23 based on the signals from the loaded liquid type storage means 18, the stored liquid type determination means 20, and the bottom valve opening detection means 21. be. That is, relay R2 in the stored liquid type determination means 20
Normally open contact r26 which becomes normal by the operation of 6 to R28
Normally open contacts r13 to r21 which are made normal by the operation of relays R13 to R21 in the loading liquid type storage means 18 and normally open contacts l4 to which are made normal by the limit switches LvA to LvC of the bottom valve opening detection means 21 are connected in series, respectively. 16, and each circuit is provided with relays R30 to R32. Then, a series of normally closed contacts r30 to r32 and a solenoid SOL are interposed, which are disconnected by this relay, and when this solenoid SOL is activated, the cylinder 31a operates the bell crank 31, and the emergency closing lever 29 is moved to the open position A. Despite this, the emergency shutoff valve 23 can be closed while maintaining its position.

In addition to the above configuration, a plurality of manhole opening detection means 33, a bottom valve opening detection means 34 during loading, an alarm means 35 for notifying abnormal conditions detected by these, and a plurality bottom valve opening detection means 36 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 33
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 to detect in advance so that an alarm can be issued via the alarm means 35 so that the loading compartment is specified as the only compartment for the time being so that the liquid being loaded will not be loaded into a room other than the desired compartment. be.

The bottom valve opening detection means 34 during loading is the limit switch LvA which is the bottom valve opening detection means 21 described 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 35. This is something that is detected in advance.

The alarm means 35 includes the above two detection means 33, 3.
4 and a signal from a detection means 36, which will be described below, causes a buzzer BZ provided on a display 27 to sound, and lights lamps PL10 and PL11 to alert the operator.

The plurality of bottom valve opening detection means 36 at the time of discharge has the same configuration as the plurality of manhole opening detection means 33,
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 35
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. 5 (Part 1) and (Part 2). A vehicle 11 carrying a multi-chamber tank 1 is placed next to one liquid type tank 12a of a storage base 12, as shown in FIG. Then, the energizing means 16 is connected to the energizing terminal 14a 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. Ground wire 37 and liquid type tank 1 provided on the vehicle
If the ground connection port 38 provided in the ground connection port 2a is provided with a ground terminal t5 as shown in FIG. and energizing means connection work can be done at the same time,
Energizing connections can be made with the same effort as conventionally required.

When the contacts t1 and t2 of the energizing means 16 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 17 to operate normally. Open contact r1
becomes the norm. In this state, the operator
The manhole 25A 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 39 (see FIG. 6) is inserted into the manhole 25A. At this time, the limit switch LmA detects that the manhole 25A is open and the loading liquid type determining means 17
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 18 becomes open. On the other hand, other normally closed contacts r5 and r6
Since the relays R2 and R3 do not operate because they are not connected in the energizing means 16, and the normally open contacts r2 and r3 are disconnected and the relays R5 and R6 do not operate, the ON state is maintained. 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 that becomes conductive when the relay is activated, and even if the energizing means 16 disconnects from the energizing terminal 14a 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 26 conductive, so the lamp
PL1 lights up (S7), and it is displayed that gasoline is loaded in the corresponding part of the display 27 as shown in FIG. 10, that is, in the first chamber 3A.

Similar to the above-mentioned loading operation, 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 14
Contacts t1 and t2 of the current-carrying means 16 are electrically connected by a. Relay R1 is activated, thereby making normally open contact r1 of loading liquid type determining means 17 conductive. In this state, when the manhole 25B of the desired chamber 3B is opened, the limit switch LmB moves to the manhole 25B.
It is detected that B is open, and the normally open contact l2 of the loaded liquid type determining means 17 is opened. Therefore, relay R7 is activated and loading liquid type storage means 18 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 r1 of the loaded liquid type display means 26 to
6 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 first chamber 3A of the multi-chamber tank 1, contacts t1 and t3 of the current-carrying means 16 are electrically connected by the connected current-carrying terminal 14b.
Relay R2 is activated, thereby opening the normally open contact r2 of the loaded liquid type determining means 17.

When the manhole 25A of the desired chamber 3A is opened in this state, the limit switch LmA detects that the manhole 25A is open and opens the normally closed contact l1 of the loading liquid type determining means 17. Therefore, the relay R5 is activated, the normally open contact r5 of the loaded liquid type storage means 18 is opened, and the relay R14 is activated. The relay R14 is self-retained by the normally open contact r14 which becomes open when the relay is activated, and the type of liquid to be loaded and the storage chamber are memorized. moreover,
This relay makes the normally open contact r14 of the loaded liquid type display means 26 conductive, so that the lamp PL2 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 39 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, 25A and 25B are open (S8), normally open contacts l1 and l2 of the plurality of manhole opening detection means 33 in FIG. 2 are connected, and relay R22 is activated (S9). As a result, the normally open contact r22 of the alarm means 35 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, if the bottom valve 5A of the desired chamber, e.g. 3A, of the multi-chamber tank 1 to be loaded is opened for some reason (S15), the loaded liquid will flow out, so the operating handle of the open bottom valve 5A will The normally open contact l4 (S16) is turned on by the operation of the provided limit switch LvA, and the relay for example R4 (S5) of the loading liquid type discriminating means 17 that discriminates between the liquid type tank of the storage base 12 and the chamber with the manhole opened. Normally open contact r4 is used to activate relay R23 of bottom valve opening detection means 34 during loading (S17),
The buzzer BZ is activated by the normally open contact r23 of the alarm means 35.
and lights up the lamp PL11 (S10,
S18) It is now possible to alert workers. Of course, if the bottom valve is closed, there will be no alarm from the alarm means 35 (S19, S20,
S13, S21) This is the same as when multiple manholes are not open.

In this state, if the pump 40 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. It can be loaded into the desired room. In this way, for example, the first chamber 3A
- When kerosene, gasoline, and diesel oil are stored in the third chamber 3C, the storage in the loaded liquid type storage means 18 and the lighting of a predetermined lamp on the display 27 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 23 provided under each bottom valve is activated by the emergency closing lever 29. Then, the contacts of the loading/discharging selection means 19 are switched from t6 and t7 to t6 and t8 (S25). Then, as shown in FIG. 7, when the ground wire 37 is connected to the ground connection port 41c of the stand tank 13, the energizing means 16 is simultaneously connected to the energizing terminal 15c of the stand tank 13c as described above (S26). Note that even if the loading/discharging selection means 19 switches the contact, the loading liquid type storage means 1
8 and the loading liquid type display means 26 are not blocked by the loading/discharging selection means 19, so the memory and display will not be lost.

When the energizing means 16 is connected, the energizing terminal 1
Since the contacts t1 and t4 are brought into conduction by 5c, the relay R3 is activated (S27), and the normally open contact r3 of the stored liquid type discriminating means 20, which is thereby turned on, activates the relay R28 (S28). That is, the relay R28 determines that the multi-chamber tank 1 and the stand tank 13c, which is a light oil tank of the gas station 13, are connected. By this relay, the normally open contact r28 of the contained liquid type display means 28 becomes open, and the lamp PL13 lights up on the display body 27 shown in FIG.
It lights up like this (S29). Therefore, the operator confirms from the above-mentioned display 27 that the chamber containing light oil is the third chamber 3C of the multi-chamber tank 1 and that the type of liquid stored in the stand tank 13c to be discharged is light oil. Then, the bottom valve 5C of the third chamber is opened.

Since the loaded liquid type storage means 18 stores that kerosene, gasoline, and light oil are stored in the first to third chambers as described above (S30), the normally open contact of the emergency closing means 24 r
14, r16, r21 are turned on, and the normally open contact r28 is turned on by the current-carrying terminal 15c of the stand tank 13c just connected, and the worker turns on the lamps PL1 to PL9 of each room where the display 27 is lit. For example, when the bottom valve 5C is opened with or without confirmation (S31), the limit switch of the operating lever 4C of the opened bottom valve 5C is activated.
Relay R32 is activated by normally open contact l6 which becomes normal when LmC is activated (S32). As a result, one normally closed contact r32 of the emergency closing means 24 is disconnected, and the solenoid SOL does not operate (S33). As a result, the cylinder 31a does not operate, so the linkage rod 30 does not move and the emergency shutoff valve 23 remains open (S34), and the desired liquid type is released from the discharge source valve 42 of the discharge pipe 22 shown in FIG. By opening it (S35), it is discharged via the discharge hose 43 (S36).

Note that when the bottom valve 5C is opened, if other bottom valves, for example 5A, are also opened, kerosene will be discharged together with light oil. To prevent this, the multiple bottom valve opening detection means 36 at the time of discharge is used to prevent this. detects this (S37), and can call the operator's attention using the alarm means 35 (S38, S39).

In the above-mentioned discharge work, even though the energizing means 16 is connected to the stand tank containing light oil, the bottom valve 5A of the second chamber 3A containing kerosene is opened, or the bottom valve 5C is opened. However, if the energizing means 14 is mistakenly connected to the energizing terminal 15c of the other station tank 13a of the gas station 13, none of the relays R30 to R32 of the emergency closing means 23 will operate (S32). As a result, the normally closed contacts r30 to r32 of the emergency closing means 23 remain open, and the solenoid SOL operates (S40). Therefore, since the cylinder 31a operates, the emergency closing lever 29
The linkage rod 30 moves without even closing the valve, and all of the emergency shutoff valves 23 close (S41).
Emissions will be stopped immediately. At this time, the absorber 32 attached to the linkage rod 30 is moved so that the emergency closing lever 29 maintains the open position A.
absorbs the amount of movement in order to move only the linkage rod 30a between the emergency shutoff valve 23 and the absorber 33. If the operator notices that no liquid is being discharged and correctly connects the energizing terminal of the stand tank to be discharged or opens the bottom valve (S42), the solenoid SOL is deactivated and the linkage rod 30a is activated. The shutoff valve 23 is restored to open. At this time, the linkage rod 30 is in the state at the beginning of the discharge operation when the emergency shutoff valve 23 is opened by the emergency close lever 29, so that the desired liquid type is discharged.

In addition, for convenience in the above operation, the emergency shutoff valve 2
3 is first opened, but in the above configuration, before the relays R30 to R32 are activated in the emergency closing means 24, the emergency shutoff valve 23 is closed by the emergency closing lever 29, and the multi-chamber tank 1 is transported. or when the emergency shutoff valve 23 is opened at a gas station but the energized terminal of the stand tank is not connected or the bottom valve is not opened, the emergency shutoff means 24
Naturally, the relays R30 to R32 are not activated, so the solenoid SOL is activated and the linkage rod 30a is moved to close the emergency shutoff valve 23. This is undesirable because the solenoid operates even when it does not need to operate, resulting in unnecessary power consumption. In order to avoid this, if the emergency closing means 24 is configured as shown in FIG.
The solenoid is activated only after the energizing means 16 has been connected to the energizing terminal of the stand tank and the bottom valve has been opened, and the solenoid is activated if the operator makes an incorrect operation or misunderstanding after the start of discharge preparation. be able to.

Briefly, in the emergency closing means 44 which replaces the emergency closing means 24, a normally open contact 17 which is open when the emergency closing lever 29 is in the open position A and a parallel arrangement which is open when either bottom valve is opened. When the normally open contacts l4 to l6 of the stand tank are connected to the energizing means of the stand tank, one of the normally open contacts r1 becomes conductive.
Relay R33 which is activated by r3 and a normally open contact r33 which is open are arranged in series, and a relay R34 which is activated when all of them are open is provided. A solenoid SOL is provided to close the emergency cutoff valve 23, in which a normally open contact r34, which is connected to the relay R34, and the above-mentioned normally closed contacts r30 to r32 are connected in series. In this way, even if the operation of connecting the stand tank, opening the bottom valve, and operating the emergency shutoff lever 27 to open the emergency shutoff valve 23 are performed independently in terms of time, if the solenoid is activated unnecessarily, it can be prevented. can be avoided.

In the configuration and operation described above, the current supply means 16 may be replaced with a circuit 45 as shown in FIG. That is, the energizing terminals 14 and 15 provided in each liquid type tank of the storage base 12 have terminals 14a and 14a, respectively.
Different resistances Ra, Rb, and Rc are interposed for each of 14b, 14c, 15a, 15b, and 15c, and the multi-chamber tank 1
The energizing terminal of the energizing means 16 is arranged in series with the resistor Ro, and a switch 46 is interposed between the relays R1 to R3 to switch the circuit depending on the difference in voltage generated at the point Q.

According to this circuit 45, the current-carrying terminals 14a to 14
Different voltages Va={Ro/(Ro+Ra)}・Vo Vb={Ro/(Ro+Rb)}・Vo Vc={Ro/(Ro+Rc)}・Vo are generated at point Q for each of c and 15a to 15c, so these Relays R1 to R3 should be energized by switch 45, which switches according to the voltage of
Select. The subsequent operations are no different from those described above. According to such a passage circuit 45, the energizing means 16 connected to the energizing terminals 14 and 15 does not require many conducting wires as described above, and can use, for example, a shielded wire 47 with a single core wire, There is an advantage that the long connecting wire of the current supply means 16 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 one type 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.

According to the above description of the embodiment, when discharging a desired liquid type from a multi-chamber tank to a stand tank that is a destination for transportation, the liquid type stored in the stand tank and the chamber of the bottom valve opened for discharge will accommodate the desired type of liquid. When the type of liquid does not match the type of liquid being used, the open emergency shutoff valve can be automatically closed to prevent discharge of the undesired liquid type.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional multi-chamber tank containing different liquids, Figure 2 (Part 1) and (Part 2)
3 is a relay circuit diagram applied to the discharge liquid mix-up prevention device of the present invention, FIGS. 3 a to 3 c are examples of the energizing means and energizing terminals, and FIG. Figure b is a diagram of the operation mechanism of the emergency shutoff valve, Figures 5 (Part 1) and (Part 2) are flowcharts showing the operation during loading and discharging, and Figure 6 is a diagram of loading into a multi-chamber tank at a storage base. , Fig. 7 is a diagram of the state of discharge from a multi-chamber tank to a stand tank at a gas station, Fig. 8 is a circuit diagram of a different emergency closing means, Fig. 9 is another embodiment of the energizing means and energizing terminal, and Fig. 10 is an example of a display body. 1...Multi-chamber tank, 3A~3B...Chamber, 4A~
4C...Operation handle, 5A~5B...Bottom valve, 1
2... Storage base, 12a to 12c... Liquid type tank, 13, 13a to 13c... Stand tank,
14, 15... energizing terminal, 16... energizing means, 1
7...Loading liquid type discrimination means, 18...Loading liquid type storage means, 19...Loading/discharging selection means, 20...
...Retained liquid type determination means, 21...Bottom valve opening detection means, 22...Discharge pipe, 23...Emergency shutoff valve, 2
4, 44... Emergency closing means, 48... Manhole opening detection means, 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. energizing means connected to different energizing terminals corresponding to the liquid type provided in each liquid type tank and each stand tank at the transportation destination, and manhole opening detection means for detecting the opening of the loading manhole in each room. , loading liquid type discriminating means for determining the type of liquid to be loaded into each chamber of the multi-chamber transport tank from the liquid type tank of the storage base by the manhole opening detection means and the energizing means; loading liquid type storage means that stores the type of loaded liquid based on a signal from the loaded liquid type determining means; By switching the loading/discharging selection means, which separates the operation of the means and the stored liquid type determining means, the type of liquid stored in each stand tank at the destination can be determined by the signal from the energizing means. A bottom valve opening detection means detects the opening of the bottom valve by operating an operating handle of the bottom valve by an operator's operation; and a bottom valve opening detection device detects the opening of the bottom valve by operating the bottom valve operating handle by an operator. An emergency shut-off valve that shuts off the valve in an emergency, and the loaded liquid type storage means and the stored liquid type determination means determine the type of liquid being discharged, and the determined liquid type is stored in the chamber of the opened bottom valve. A device for preventing mix-up of discharged liquids from a multi-chamber tank, characterized in that the device comprises an emergency closing means for closing the emergency shutoff valve when the types of liquids in the tank do not match.