JPS6323076B2 - - 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 This prevents mix-up of liquids discharged from multi-chamber tanks, which eliminates the need to replace the energizing terminals when loading the same type of liquid into two or more chambers. The purpose is to provide equipment.

[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 has the following characteristics: However, the current supply means 12 is connected to different current supply terminals corresponding to the liquid type provided in each liquid type tank of the liquid storage base, and the manhole opening detection means 34 detects the opening of the loading manhole in each room. A signal indicating which manhole is open from the manhole opening detection means and a signal indicating which liquid type is to be loaded from the energizing means are used to transport the liquid from the liquid type tank at the storage base. loading liquid type determining means 13 for determining the type of liquid to be loaded into each chamber of the multi-chamber tank; and loading liquid for storing the type of liquid loaded in each chamber based on a signal from the loading liquid type determining means. The present invention is provided with a type storage means 14 and a loaded liquid type display means 15 for displaying the type of liquid loaded in each chamber based on a signal from the loaded liquid type storage means.

[Operation and effects of the invention]

According to the present invention, the bottom valve, which is opened by an operator when discharging a desired liquid type from a multi-chamber tank into a stand tank, is displayed based on the memory of the liquid type stored in each chamber in advance. This can be confirmed by means. 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.

Furthermore, since a manhole opening detection means is provided, which liquid type is loaded from the energizing means connected to different energizing terminals corresponding to the liquid type provided in each liquid type tank of the liquid storage base. The type of liquid to be loaded into each chamber can be determined and stored based on the signal indicating whether the manhole is about to open and the signal indicating which manhole is open from the manhole opening detection means. In this case, when the same type of liquid is loaded into, for example, two or more chambers, there is no need to replace the energizing terminal connected to the energizing means, and the work can be simplified and made more efficient.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof. FIG. 2 shows a relay circuit 10 of the device for preventing mix-up of discharged liquids according to the present invention. In addition, in the following description of each structure, components having the same function, such as a bottom valve, in each chamber of the multi-chamber tank 1 are distinguished by adding suffixes A, B, and C, respectively.

The present invention is installed in a vehicle 21 equipped with a multi-chamber tank 1 as shown in FIG. energizing means 12 (see FIG. 2) connected to different energizing terminals 16; and manhole opening detection means 34 for detecting openings of loading manholes 17A to 17C in each chamber shown in FIG.
A signal indicating which manhole is open from the manhole opening detection means 34 and a signal indicating which liquid type is to be loaded from the energizing means 12 is detected in the liquid type tank of the storage base 11. loading liquid type discriminating means 13 (see Fig. 2) for determining the type of liquid to be loaded into each chamber of the multi-chamber transport tank; The loading liquid type storage means 14 stores the type of liquid loaded in each chamber based on the signal of the loading liquid type storage means 14, and the loading liquid type display means 15 stores the type of liquid loaded in each chamber based on the signal of the loading liquid type storage means 14. It is structured as follows.

Specifically, the energizing means 12 is an energizing terminal connected to different energizing terminals 16a to 16c, for example, 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 13 via R3 (see FIG. 2). The energizing terminals of each liquid type tank are set to conduct at different positions for each tank 11a to 11c, 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 11, when the energizing means 12 is connected to the energizing terminal 16 on the liquid type tank side, the multi-chamber tank The type of liquid to be loaded into the tank 1 is determined.

The manhole opening detection means 34 is a loading manhole 17A of each chamber of the multi-chamber tank 1 shown in FIG.
~17C are limit switches LmA to LmC that detect the opening of any one of them, and normally open contacts l1, l2, and l3, which become normal when they are activated, are the loading liquid type discriminating means 13 described below and the multiple manhole opening detection described later. The means 18 are respectively provided.

The loading liquid type determining means 13 is connected to the above-mentioned energizing means 1.
2 and the manhole opening detection means 34, 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 17A, opens, and the normally open contacts r1 to r3 are operated 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 12, and normally open contacts l1 to l3 that are activated by the limit switch of the opened manhole. A signal is output to the loading liquid type storage means 14 by relays R4 to R12, which operate only when both are in the flow state.

The loading liquid type storage means 14 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 13, and relay R4 provided in the loading liquid type determining means 13 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 13 are stored, and at the same time, the same signal as the stored signal is output to the loading liquid type display means 15 by actuation of the relays R13 to R21. ing.

The loaded liquid type display means 15 lights up a corresponding lamp, for example, in order to let the operator confirm what kind of liquid is stored in each chamber of the multi-chamber tank 1. That is, the relays R13 to R
The normally open contacts r13 to r21 operated at
~PL9 is now lit. In addition, R
Needless to say, as long as 13 to R21 are self-maintained, the lamp remains lit. The display in the loaded liquid type display means 15 may be displayed by lighting a lamp as described above, or by displaying by text, color, or the like.

In addition to the above configuration, if a plurality of manhole opening detection means 18, a bottom valve opening detection means 19, and an alarm means 20 are provided to notify abnormal conditions detected by these, it is possible to avoid mistakes that the worker does not notice during loading work. and avoid erroneous operations.

Briefly, multiple manhole opening detection means 18
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 20 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 19 detects the bottom valves 5A to 5 of each chamber.
Limit switch installed on the operating handle of C
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 LvA to LvC, and when they are connected, one of them is operated. Relays R23 to R25 are provided. This is because if the bottom valve of the chamber to be loaded is opened, the loaded liquid will flow out, so to avoid this, the operator can be notified of this via the alarm means 20. This is something that is detected in advance.

The alarm means 20 includes the two detection means 18, 1
In response to the signal from 9, the buzzer BZ provided on the display 26 is activated, and the lamps PL10 and PL11 are activated.
This lights up to alert workers.

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 11 will be described. In order to facilitate understanding, this will be explained in conjunction with the flowchart shown in FIG.

As shown in FIG.
side by side. Then, the energizing means 12 is connected to the energizing terminal 16a 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 third wire is connected to the ground wire 22 provided in the vehicle and the ground connection port 23 provided in the liquid type tank 11a.
By incorporating the contacts t1 to t4 of the energizing means 12 and the energizing terminals 16a to 16c, respectively, together with the grounding terminal t5 as shown in FIG. Energizing connections can be made with the same effort as required from the beginning.

When the contacts t1 and t2 of the energizing means 12 are electrically connected, the relay R1 is activated by the electric power supplied from the power source of the vehicle 21 through the contact t1 (S2), whereby the loaded liquid type determining means 13 is normally operated. Open contact r1
becomes the norm. In this state, the operator
The manhole 17A 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 24 (see FIG. 6) is inserted into the manhole 17A. At this time, the limit switch LmA (see FIG. 4), which is the manhole opening detection means 34, detects that the manhole 17A is open, and the loaded liquid type determination means 1
Since the normally open contact l1 of No. 3 is passed through (S4), relay R4 is activated (S5).

As a result, the normally open contact r4 of the loaded liquid type storage means 14 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 12, 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 which becomes conductive when the relay is activated, and even if the energizing means 12 is disconnected from the energizing terminal 16a of the liquid type tank 11a, the loaded liquid type will continue to be maintained. Containment room is memorized.

Furthermore, this relay makes the normally open contact r13 of the loaded liquid type display means 15 conductive, so the lamp
PL1 lights up (S7), and it is displayed that gasoline is loaded in the corresponding part of the display 26 as shown in FIG. 11a, that is, in the first chamber 3A.

Similar to the above-mentioned loading operation, when loading from the liquid type tank 11a of the storage base 11 to the second chamber 3B of the multi-chamber tank 1, the connected energizing terminal 16
Contacts t1 and t2 of the current-carrying means 12 are electrically connected by a. Relay R1 is activated, thereby making normally open contact r1 of loaded liquid type determining means 13 conductive. When the manhole 17B of the desired chamber 3B is opened in this state, the limit switch LmB
It is detected that B is open, and the normally open contact l2 of the loaded liquid type determining means 13 is opened. Therefore, relay R7 is activated and loading liquid type storage means 14 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, the normally open contact r of the loading liquid type display means 15 is controlled by this relay.
16 becomes a pass, so the lamp PL4 lights up.
Such storage of the liquid type and lighting of the lamp are made possible by the presence of the manhole opening detection means 34 and signals from the above-mentioned energizing means 12. In this case, when loading the same type of liquid into two or more chambers 3A and 3B as in the example described above, there is no need to replace the energizing terminal 16a connected to the energizing means 12, which simplifies the work and improves efficiency. It is possible to aim for

Similarly, other liquid type tanks 1 of the storage base 11
When loading work from 1b to the third chamber 3C of the multi-chamber tank 1, for example, the connected energizing terminal 16
Contacts t1 and t3 of the current-carrying means 12 are electrically connected by b. Relay R2 is activated, thereby opening the normally open contact r2 of the loading liquid type determining means 13.

When the manhole 17C of the desired chamber 3C is opened in this state, the limit switch LmC of the manhole opening detection means 34 detects that the manhole 17C is open, and the loaded liquid type determination means 13 detects that the manhole 17C is open.
through the normally open contact l3. Therefore, the relay R11 is activated, the normally open contact r11 of the loaded liquid type storage means 14 is opened, and the relay R20 is activated.
Normally open contact r2 becomes conductive as this relay operates
0, the relay R20 is self-held and the type of liquid to be loaded and the storage chamber are stored. Furthermore, the normally open contact r20 of the loaded liquid type display means 15 is opened by this relay, so that the lamp PL8 is lit.

Similarly, liquid can be loaded one after another into a desired chamber of the multi-chamber tank 1 from each liquid type tank of the storage base 11, 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 24 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 17A and 17B, are open (S8), normally open contacts l1 and l2 of the plurality of manhole opening detection means 18 in FIG. 2 are connected, and relay R22 is activated (S9). As a result, the normally open contact r22 of the alarm means 20 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 storage means 14, which discriminates between the liquid type tank of the storage base 11 and the chamber in which the manhole is opened, is turned on. With the normally open contact r4, the bottom valve opening detection means 1
9 is activated (S17), and the normally open contact r23 of the alarm means 20 causes the buzzer BZ and lamp PL11 to sound and light (S10, S18) to alert the worker. . Of course, if the bottom valve is closed, alarm means 2
The fact that there is no alarm due to 0 (S19, S20, S13, S21) is the same as the case where a plurality of manholes are not open as described above.

In this state, if the pump 25 shown in FIG. 6 is driven (S22) and the liquid in the liquid type tank 11a 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. When a predetermined type of liquid is stored in each chamber, storage in the loaded liquid type storage means 14 and lighting of a predetermined lamp on the display 26 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, the operator must check the chamber in which the type of liquid is stored using the display 26 mentioned above. For example, the desired liquid can be drained. That is, as shown in FIG. 7, in order to discharge the multi-chamber tank 1 into a predetermined tank 27c of the gas station 27, first connect the ground, open the bottom valve 5C of the corresponding chamber 3C, and open the discharge source valve 29 of the discharge pipe 28. Open and discharge hose 30
can be discharged through.

In the configuration and operation described above, the current supply means 12 may be replaced with a circuit 31 as shown in FIG. That is, the energizing terminals 16 provided in each liquid type tank of the storage base 11 have terminals 16a and 16.
Different resistors Ra, Rb, and Rc are interposed for each of b and 16c, and the current-carrying part of the current-carrying means 12 of the multi-chamber tank 1 is
A switch 32 is arranged in series with Ro and is interposed between relays R1 to R3 to switch the circuit depending on the difference in voltage generated at point Q.

According to this circuit 31, the current-carrying terminals 16a to 16
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 that should be energized by switch 32
Select. The subsequent operations are no different from those described above. According to such an energizing circuit 31, the energizing means 12 connected to the energizing terminal 16 does not require many conductive wires as described above, and can use, for example, a shielded wire 33 with a single core wire, resulting in a long wire. There is an advantage that the connection wire of the current supply means 12 can be made with a thin wire.

Figures 9a and 9b show different embodiments of the relay circuit 40 applied to the discharge liquid mix-up prevention device. Note that parts that are not different from those in FIG. 2 are denoted by the same reference numerals, and explanations thereof will be omitted. This embodiment has a discharge liquid type discriminating means 41 and a discharge liquid type display means 42 in addition to the above-mentioned ones.
Further, a plurality of bottom valve opening detection means 43 at the time of discharge is provided, of which the discharged liquid type discrimination means 41 and the plurality of bottom valve opening detection means 43 at the time of discharge are connected via the loading/discharging selection means 44 to the loading liquid type discrimination means. 13 and a plurality of manhole opening detection means 18.

On the other hand, a stand tank 2 of a gas station 27 that drains the liquid from the multi-chamber tank 1 and stores it.
Although not shown, the terminals 7a to 27c are provided with energizing terminals 45a to 45c, which are the same as those of the storage base 11 shown in FIGS. 3a to 3c. That is, as in the case of the liquid type tank, the shape of the energizing terminal uniquely determines the type of liquid handled by the stand tank.

The discharge liquid type determining means 41 has normally open contacts r1 to r3.
Relays R26 to R28 are interposed therebetween, respectively, and lamps PL12 to PL of the discharged liquid type display means 42
14 is turned on.

The plurality of bottom valve opening detection means 43 at the time of discharge has the same configuration as the plurality of manhole opening detection means 18,
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 20
This is to generate sound and light up BZ and lamp PL11.

The loading/discharging selection means 44 is switched during loading work at the storage base 11 and during discharging work at the gas station 27, and separates the respective operations of the discriminating means 13, 41 and the detecting means 18, 43.

According to such a relay circuit 40, each chamber of the multi-chamber tank 1 can be matched with the stand tank of the gas station 27 not only during loading work but also during discharging work, thereby preventing confusion during discharging. Can be done. This will be explained below in conjunction with the flowchart shown in FIG. In the storage base 11, the loading/discharging selection means 44 is electrically connected between the contacts t6 and t7, and as described in the previous embodiment, the loading/discharging selection means 44 has already been connected to the multi-chamber tank 1.
The multi-chamber tank 1 is transported with each liquid type stored in each chamber, stored in the loaded liquid type storage means 14, and the lamp in the loaded liquid type display means 15 is lit, and the vehicle 21 is transported to a gas station. 27 stand tank, for example, 27b. First, the contacts t6 and t8 of the loading/discharging selection means 44 to which the contacts t6 and t7 are connected are connected.
(S30). Then, when the ground wire 22 is connected as shown in FIG.
b at the same time. Note that even if the contacts of the loading/discharging selection means 44 are switched, the loading liquid type storage means 14 and the loading liquid type display means 15 are not shut off by the loading/discharging selection means 44, so the memory and display disappear. Never.

When the energizing means 12 is connected, the energizing terminal 4
5b conducts the contacts t1 and t3, so the relay R2 is activated (S31), and the normally open contact r2 of the discharge liquid type discriminating means 41, which becomes conductive, activates the relay R27 (S32). That is, relay R
27 determines that the multi-chamber tank 1 and the stand tank 27b, which is a kerosene tank of the gas station 27, are connected. This relay opens the normally open contact r27 of the discharge liquid type display means 42, and the lamp PL13 lights up on the display 4 shown in FIG. 11b.
It lights up like 6 (S33). Therefore, if gasoline, diesel oil, and kerosene are stored in each chamber of the multi-chamber tank 1 in that order, the operator can confirm that the chamber containing kerosene is the third chamber 3C ( S34).

Therefore, after opening the bottom valve 5C (S35), the discharge source valve 29 is opened (S36), and the desired liquid type, kerosene, is discharged from the stand tank 27 through the discharge hose 30.
b (S37). Note that when the bottom valve 5C is opened, if other bottom valves, such as 5B, are also opened,
Since light oil will be discharged together with kerosene, in order to prevent this, the multi-bottom valve opening detection means 43 at the time of discharge detects this (S38), and the alarm means 20 alerts the operator (S39, S40). )be able to.

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, a digital logic circuit consisting of a gate circuit or the like may also be used.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional multi-chamber tank containing different liquids, Fig. 2 is a relay circuit diagram applied to the device for preventing mix-up of discharged liquids of the present invention, and Figs. 3 a to c are energizing means and energizing terminals. FIG. 4 is a sectional view of a multi-chamber tank of the present invention, FIG. 5 is a flowchart showing the operation during loading, FIG. 6 is a diagram of loading into a multi-chamber tank at a storage base, and FIG. 7 8 shows another embodiment of the energizing means and the energizing terminal, and FIG. 9 a and b show different embodiments of the relay circuit applied to the present invention. , Fig. 10 is a flowchart showing the operation at the time of ejection, Fig. 11 a, b
is an example of a display body. 1...Multi-chamber tank, 3A~3B...Chamber, 5A~
5B...Bottom valve, 11...Storage base, 11a-11
c...Liquid type tank, 12...Electrification means, 13...
Loading liquid type determination means, 14...Loading liquid type storage means, 15...Loading liquid type display means, 16, 16a
~16c...Electricity terminal, 26,46...Display body,
27a-27c...stand tank, 28...discharge pipe, 34...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; manhole opening detection means for detecting the opening of the loading manhole in each room; A signal indicating which manhole is open and a signal indicating which liquid type is about to be loaded from the energizing means are transmitted from the liquid type tank at the storage base to each chamber of the multi-chamber transport tank. loading liquid type determining means for determining the type of liquid to be loaded; loading liquid type storage means for storing the type of liquid loaded for each chamber based on a signal from the loading liquid type determining means; loading liquid type display means for displaying the loaded liquid type based on a signal from the loading liquid type storage means; 1. A device for preventing mix-up of discharged liquid from a multi-chamber tank, characterized in that the bottom valve to be opened by a person can be confirmed by the loaded liquid type display means.