JPH0891112A - Tank lorry mixture prevention device - Google Patents

Abstract

(57) [Abstract] [Purpose] Firstly, only the liquids to be unloaded can be accurately unloaded, and it is possible to reliably prevent the occurrence of oil-mixed accidents and mixed-liquid accidents of different kinds of liquids. Secondly, it proposes a tank lorry mixture prevention device that is simple in construction, excellent in cost, easy to operate, and highly reliable. In this liquid mixture prevention device 8, when a liquid is loaded in each tank chamber 3, a liquid type key 9 of the liquid to be loaded is loaded in each loaded liquid type detecting means 10 to obtain the loaded liquid type information. To be Further, at the time of unloading, the liquid type key 9 of the liquid to be unloaded is loaded into the unloading liquid type detecting means 11 to obtain the unloading liquid type information, and the tank chamber 3 of the unloading target is the tank chamber instructing means. Instructed at 12. Then, the collating means 13 compares the loaded liquid type information of the tank chamber 3 with the unloading liquid type information, and when they match, the lock device 14 of the bottom valve 4 of the tank chamber 3 is unlocked, Unloading becomes possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank lorry mixture prevention device. That is, the present invention relates to a mixed liquid prevention device such as an oil mixed prevention device that prevents a liquid different from the liquid to be actually unloaded from being unloaded in a tank truck.

[0002]

2. Description of the Related Art In a tank truck, the inside of a tank is generally divided into a plurality of tank chambers, and different kinds of liquids such as gasoline, light oil, kerosene, and other oils are loaded and transported in each tank chamber. Often. For unloading from the tank truck, the tank chamber in which the liquid to be unloaded is loaded and the cargo receiving tank on the side of the ground facility such as a gas station are set at the bottom valve of the tank chamber, the discharge pipe, the discharge valve, and the discharge port. After that, the hose is connected by a hose, and the bottom valve and the discharge valve are switched from closed to open.

[0003]

By the way, the following problems have been pointed out in such a conventional tank truck. First of all, when unloading, the type of liquid (unloading liquid type) to be unloaded in the receiving tank of the gas station, etc. and the tank chamber where the bottom valve is opened and unloading is actually started. What is the type of liquid loaded (target liquid type)?
Of course, this must always match, but in the past, this decision has often relied on visual inspection and memory. In other words, what kind of liquid is loaded in which tank chamber, what kind of liquid should be unloaded, what bottom valve should be switched from closed to open, etc. I depended on my memory. In this way, conventional unloading work often relied on visual inspection and memory,
There was a risk of unloading from a tank chamber loaded with a liquid different from the liquid to be unloaded due to visual error or memory error. And if you misidentify the type of liquid loaded in the tank chamber and accidentally unload the liquid different from the liquid that should be unloaded, the liquid may be unloaded in the receiving tank such as at a gas station. Different types of liquids are mixed in, resulting in oil-mixing accidents and liquid-mixing accidents, which is extremely dangerous and also requires a great deal of time and effort for recovery after the fact.

Secondly, in order to prevent such oil-mixing accidents and liquid-mixing accidents, it has been conventionally practiced to attach a liquid-mixing preventing means to the tank truck. As a conventional means for preventing this kind of liquid mixture, for example, one in which an oil type clip is sandwiched between the bottom valve operation handles of the tank chamber, a color sensor for oil type discrimination is incorporated in the discharge pipe, and the like are typical. However, such a conventional liquid mixture prevention means has problems in reliability and is troublesome to operate, and those with high reliability and easy operation have complicated structure and cost problems. It had been.

In view of the above situation, the present invention has been made to solve the problems of the above-mentioned conventional examples, and is a loaded liquid type detection means using a liquid type key, an unloading liquid type detection means,
And a tank chamber instruction means, etc., and in claim 1, the bottom valve is unlocked only when the information between them is matched by the matching means, and in claim 2, the discharge valve is unlocked. In the item 3, by additionally providing the display means, firstly, the liquid to be unloaded can be accurately unloaded, the occurrence of a mixed liquid accident of different kinds of liquids can be prevented, and the second Moreover, it is an object of the invention to propose a tank lorry mixture prevention device which can be easily and easily realized with high reliability.

[0006]

The technical means of the present invention for achieving this object are as follows. First, claim 1
For: That is, the tank lorry mixture prevention device is divided into a plurality of tank chambers in the tank, and each tank chamber is provided with a bottom valve.
In a tank truck in which unloading from each of the tank chambers is performed via each of the bottom valves, it is possible to prevent unloading of a liquid different from the liquid to be unloaded. Further, it comprises the following liquid type key, loaded liquid type detecting means, unloading liquid type detecting means, tank chamber instructing means, collating means, lock device and the like.

That is, for each kind of liquid such as gasoline, light oil, kerosene, and other liquids loaded and unloaded in each tank chamber,
Correspondingly prepared liquid type key and the liquid type key provided for each of the tank chambers and loaded with the liquid type key of the liquid to be loaded in each of the tank chambers. A loading liquid type detecting means for obtaining information, an unloading liquid type detecting means for loading the liquid type key of the liquid to be unloaded at the time of unloading, and thus obtaining unloading liquid type information, and an unloading time ,
Tank chamber instructing means for instructing any one of the tank chambers to be unloaded, and loaded liquid type information from the loaded liquid type detecting means for the tank chamber instructed by the tank chamber instructing means, Collating means for comparing the unloading liquid type information from the unloading liquid type detecting means to determine whether or not the both liquid type information match, and a bottom valve of each of the tank chambers attached to the checking means. And a lock device for unlocking the lock of the bottom valve of the tank chamber only when it is determined that the two liquid type information match.

Next, claim 2 is as follows. That is, this tank lorry mixture prevention device is defined by claim 1.
In the tank lorry mixture prevention device described above, the locking device is not attached to the bottom valve of each of the tank chambers to lock and unlock the bottom valve of the tank chamber, but the locking device from the bottom valve of each of the tank chambers. The discharge pipe is attached to the discharge valve of the collected discharge port, and the lock of the discharge valve of the discharge port is unlocked only when the collating means determines that the two liquid type information match. There is. The claim 3 is as follows. That is, this tank lorry liquid mixture prevention device corresponds to the tank lorry liquid mixture prevention device according to claim 1 or 2 when the liquid type information of the tank lorry is discriminated by the collating means. Display means for displaying is provided.

[0009]

Since the present invention comprises such means, it operates as follows. This tank lorry is provided with a mixed liquid prevention device. First, when the liquid is loaded in each tank chamber, the liquid type key of the liquid to be loaded is loaded in the loaded liquid type detection means, and the loaded liquid type information for each tank chamber is stored. Is obtained. Then, at the time of unloading, the liquid type key of the liquid to be unloaded is loaded into the unloading liquid type detection means, information on the unloading liquid type is obtained, and the tank chamber for unloading is instructed by the tank chamber instructing device. To do. Then, the collating means compares the loaded liquid type information regarding the instructed tank chamber and the unloading liquid type information,
It is determined whether or not the information on both liquid types matches. When the information on both liquid types matches, the lock of the bottom valve of the tank chamber by the lock device is released, and unloading is started. On the other hand, when the information on both liquid types does not match, the lock of the bottom valve of the tank chamber is continued by the lock device, and the unloading becomes impossible.

According to the present invention, the lock device is attached to the discharge valve of the discharge pipe, not to the bottom valve of each tank chamber. Therefore, when the two liquid type information matches, the lock of the discharge valve by the lock device is released, and the unloading from the tank chamber instructed by the tank chamber instructing means is started. On the other hand, when the information of both liquid types does not match, the lock of the discharge valve by the lock device is continued, and the unloading becomes impossible. Further, in claim 3, a display means is further provided, and the display corresponding to the coincidence or non-coincidence of both liquid type information is carried out.

Therefore, according to such a liquid mixture prevention device, firstly, the lock of the bottom valve of the tank chamber is released only when the loaded liquid type information and the unloading liquid type information match. Thus, in Claim 2, the lock of the discharge valve of the discharge pipe is released. That is, unloading is possible only when the liquid loaded in the tank chamber to be unloaded matches the liquid to be unloaded. According to the third aspect, these are surely displayed and transmitted to the operator by the display means. In this way, only the liquid to be unloaded is accurately unloaded and a mixed liquid accident is prevented. Secondly, this is realized by a simple structure, high reliability, and easy operation.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. 1, FIG. 2, FIG. 3 and FIG. 4 show an embodiment of the present invention, FIG. 1 is an overall explanatory view, FIG. 2 is a perspective view of various liquid type keys, and FIG. 3 is a perspective view of an example of a controller. FIG. 4 (1) is a rear view of the tank truck, and FIG. 4 (2) is a perspective view of another example of the controller.

First, the tank truck 1 will be described with reference to FIG. In the tank truck 1, the inside of the tank 2 is divided into a plurality of tank chambers 3, each tank chamber 3 is provided with a bottom valve 4, and unloading from each tank chamber 3 is performed by each bottom valve 4.
Done through.

The tank truck 1 will be described in more detail. The inside of the tank 2 of the tank truck 1 is divided into about 2 to 7 chambers (3 in the illustrated example by a partition plate P along the width direction).
Compartments) are divided into a plurality of tank chambers 3. And
Regular gasoline, high-octane gasoline, diesel oil, kerosene,
Other liquids such as oil are loaded from storage tanks such as oil tanks into the respective tank chambers 3, but different types of liquids are often loaded into the respective tank chambers 3. Then, the tank truck 1 carries these by loading them in the respective tank chambers 3 of the tank 2, and unloads them on the ground facility at the destination, for example, a receiving tank such as an underground tank of a gas station. The unloading from the tank 2 to the above-ground equipment is performed by the bottom valve 4 of each tank chamber 3, the discharge pipe 5 whose one end is branched and connected to each bottom valve 4, the other end of the collected discharge pipe 5 and the tank 2 The discharge valve 6 and the discharge port 7 located on the left and right sides of the lower side of the discharge hose, a discharge hose (not shown) whose one end is connected to the discharge port 7, the oil supply port of the cargo receiving tank to which the other end of the discharge hose is connected Carried out through. The receiving tank on the ground equipment side is divided according to the type of liquid such as regular gasoline, high-octane gasoline, light oil, kerosene, and other oils, and the discharge hose is
It is connected to one of the fuel fillers. In addition, as the tank truck 1, in addition to a single unit type as shown in the figure,
There is also a trailer type in which the trailer equipped with the tank 2 is towed by a tractor.

As shown in FIG. 1, a mixed liquid prevention device 8 such as an oil mixed prevention device for the tank truck 1 includes a liquid type key 9, a loaded liquid type detecting means 10, and an unloading liquid type detecting means 11 described below. , Tank chamber instructing means 12, collating means 13, lock device 14, display device such as warning device 15, and the like. The liquid mixture prevention device 8 prevents a liquid different from the liquid to be unloaded from being unloaded. Hereinafter, the configuration of the liquid mixture prevention device 8 will be described in detail.

First, the liquid type key 9 will be described. Liquid type key 9
Is prepared in advance for each type of liquid such as regular gasoline, high-octane gasoline, light oil, kerosene, and other oils loaded and unloaded in each tank chamber 3. That is,
The liquid type key 9 is in the form of a card or a bill, and a plurality of liquid type keys 9 are prepared corresponding to the types of liquids such as various oils. For example, FIG. 2 (1) shows a liquid type key 9 of a groove 16 type, and it is possible to distinguish and identify each other by the difference in the position, shape, number, etc. of the groove 16. Further, FIG. 2 (2) shows a liquid type key 9 of a hole 17 type, and it is possible to distinguish and identify each other by the position, shape, number, etc. of the holes 17. . Further, FIG. 2 (3) shows a magnetic type key 9 for liquids, which can be distinguished / identified from each other by the difference in the recorded contents, position, number, etc. of the attached magnetic medium 18. Has become.

Next, the loaded liquid type detecting means 10 will be described. The loaded liquid type detection means 10 is provided for each tank chamber 3, and when loading the liquid in each tank chamber 3, the loaded liquid type key 9 is loaded to obtain the loaded liquid type information. It is like this. That is, 19 is a loading port provided in a manhole or the like at the top of each tank chamber 3, and the liquid is loaded in each tank chamber 3 from this loading port 19. Then, in the vicinity of the loading port 19 of each tank chamber 3 as described above, the loaded liquid type detecting means 10 is provided.
Is provided, the loaded liquid type information can be input by loading the liquid type key 9 of the liquid to be loaded when the liquid is loaded in each tank chamber 3. Incidentally, the loaded liquid type key 9 is removed from the loaded liquid type detecting means 10 by removing it from time to time.

Next, the unloading liquid type detecting means 11 will be described. The unloading liquid type detecting means 11 is loaded with the liquid type key 9 of the liquid to be unloaded at the time of unloading, and thus the unloading liquid type information can be obtained. That is, the unloading liquid type detection means 11 is attached to the controller A in the illustrated example, and by loading the liquid type key 9 of the liquid to be unloaded, the unloading liquid type information can be input. ing. Note that the loaded liquid type key 9 is removed from the unloading liquid type detection means 11 after removal as appropriate.

The tank room indicating means 12 is as follows. The tank chamber instructing means 12 indicates one of the tank chambers 3 to be unloaded at the time of unloading. The tank chamber instructing means 12 is composed of, for example, a button switch for each tank chamber 3 attached to the controller A, and the instruction information of the desired tank chamber 3 is input by pressing any one of them.

Next, the collating means 13 will be described. The collation unit 13 compares the loaded liquid type information from the loaded liquid type detection unit 10 and the unloading liquid type information from the unloading liquid type detection unit 11 for the tank chamber 3 instructed by the tank chamber instructing unit 12. The comparison is performed to determine whether the information on both liquid types matches.
That is, the collating means 13 includes the loaded liquid type information from the loaded liquid type detecting means 10, the unloading liquid type information from the unloading liquid type detecting means 11, and the instruction information from the tank chamber instructing means 12, respectively. Transmitted and stored. Then, whether or not the loaded liquid type information at the time of loading, which is stored for the tank chamber 3 to be unloaded specified by the instruction information, and the unloaded liquid type information regarding the liquid to be unloaded match Or compared and judged. The information transmission, transmission, and storage to the collating means 13 and the comparison and determination by the collating means 13 are performed electrically or mechanically, but the collating means 13 in the illustrated example is the controller A. The electric type is incorporated in the computer, and for example, a microcomputer is used.

Next, the lock device 14 will be described. The lock device 14 is attached to the bottom valve 4 of each tank chamber 3 and unlocks the bottom valve 4 of the tank chamber 3 only when the collating means 13 determines that both liquid type information match. It has become. That is, each lock device 14 locks each bottom valve 4 in the normally closed state, and the collating means 13 determines that the loaded liquid type information of the specific tank chamber 3 and the unloading liquid type information match as described above. When the determination is made, the fact is transmitted, and the lock on the bottom valve 4 is released. In this case, the bottom valve 4 is switched from closed to open by manual operation afterwards, but in the case of the bottom valve 4 made of an electromagnetic on-off valve, it is switched from closed to open by button operation or the like.

The locking device 14 may be configured as follows, regardless of the illustrated example. That is, the locking device 14 is not attached to each bottom valve 4 of each tank chamber 3 to lock and unlock each bottom valve 4 as in the illustrated example, but the locking device 14 is used to lock the bottom valve 4 of each tank chamber 3. The discharge pipe 5 from 4 is attached to the discharge valve 6 of the collected discharge port 7, and the discharge valve 6 of the discharge port 7 is locked only when the collating means 13 determines that the two liquid type information match. May be canceled. That is, in this case, the lock device 14 locks both of the discharge valves 6 located, for example, on the lower sides of the tank 2 in the normally closed state, and the collating means 1
When it is determined in 3 that the loaded liquid type information of the specific tank chamber 3 and the unloading liquid type information match, the fact is transmitted, and the lock on the discharge valve 6 is released accordingly. Then, the discharge valve 6 is switched from closed to open by manual operation, but in the case of the discharge valve 6 made of a solenoid valve, it is switched from closed to open by button operation or the like.

Next, the display means will be described. The display means performs a corresponding display when the collating means 13 determines that both liquid type information is in agreement or inconsistency. In the illustrated example, the warning device 15 is used as such a display means, and the warning device 15 causes the collation means 13 to display the loaded liquid type information and the unloading liquid type information of the specific tank chamber 3 as described above. If it is determined that the two do not match, that fact is communicated,
Therefore, warnings such as sound and light will be given. The sound warning may be an intermittent warning sound method using a speaker or a method that warns the type of liquid loaded in the tank chamber 3 with a synthetic voice. For the latter, for example, "gasoline is loaded. , "Light oil is loaded" and other synthetic voices are possible. In the illustrated example, such a warning device 15 is also incorporated in the controller A.

FIG. 3 shows an example of the controller A of such a liquid mixture prevention device 8. The controller A of FIG. 3 will be described. The controller A is provided with a liquid type display portion B for each tank chamber 3 on its surface. Based on the loaded liquid type information from the loaded liquid type detection means 10 of 3, the type of liquid loaded in each tank chamber 3 is displayed by an electrical or mechanical display method. Other this controller A
On the front surface of the device, there are provided a loading port for the liquid type key 9 of the unloading liquid type detecting means 11, button switches of the tank chamber instructing means 12, a warning device 15 which is an example of a display device, and the like. Each button switch of the tank chamber instruction means 12 is arranged corresponding to the liquid type display portion B of each tank chamber 3, and the tank chamber instruction means is checked while checking the liquid type display portion B of each tank chamber 3. 12 button switches can be operated, which is convenient.

Further, in FIG. 4 (2), the mixed liquid prevention device 8 is shown.
Another example of the controller A in FIG. In the tank truck 1, as shown in FIG. 4 (1), it is obligatory to provide the oil type display plate C on the rear surface of the tank 2, but in the illustrated example, the oil type display plate C is provided. , The controller A shown in FIG. 4 (2) is also used.

That is, the configuration of the controller A shown in FIG. 4B is the same as that of the controller A shown in FIG.
In accordance with the above, the liquid type display section B for each tank chamber 3, the loading port of the unloading liquid type detecting means 11, each button switch of the tank chamber instructing means 12, the warning device 15, etc. are provided on the front surface or the upper surface thereof. Each button switch of the tank chamber instructing means 12 is arranged corresponding to the liquid type display portion B for each tank chamber 3. Other necessary information is displayed on the front surface of the controller A. In the example of FIG. 4, the oil type display plate C of FIG. 4 (1) is also used as the controller A of FIG. 4 (2), and the controller A of the oil type display plate C is used. It is arranged at the position. Therefore, conventionally, the oil type indicator C has been manually
The controller A that also serves as the oil type display plate C automatically displays these on the liquid type display section B, etc., and is necessary on the other front side. Since such a description is displayed, no manual operation is required and it is efficient.

The present invention is constructed as described above. Then it becomes as follows. Liquids such as regular gasoline, high-octane gasoline, light oil, kerosene, and other oils are loaded in each tank chamber 3 of the tank 2 of the tank truck 1 and then unloaded after being transported. As shown in FIG. 1 and the like, the tank truck 1 is provided with a liquid mixture prevention device 8. First, when the liquid is loaded in each tank chamber 3, the liquid of the loaded liquid is loaded in each tank chamber 3. The seed key 9 is loaded into each of the loaded liquid type detection means 10, and thus the loaded liquid type information for each tank chamber 3 can be obtained. And
At the time of unloading to the cargo receiving tank on the side of a ground facility such as a gas station, the liquid type key 9 of the liquid to be unloaded is loaded into the unloading liquid type detecting means 11, and thus the unloading liquid type information is obtained. At the same time, the tank chamber instructing means 12 instructs the tank chamber 3 to be unloaded. Then, the collating unit 13 compares the loaded liquid type information regarding the tank chamber 3 instructed by the tank chamber instructing unit 12 with the unloading liquid type information regarding the liquid to be unloaded, and the both liquid type information matches. It is determined whether or not to do it.

As a result, when the collating means 13 determines that the two liquid type information matches, the tank chamber instructing means 1
Regarding the bottom valve 4 of the tank chamber 3 instructed in 2, the normally closed lock by the attached lock device 14 is released. Therefore, the liquid loaded in the tank chamber 3
Through the opened bottom valve 4, the cargo is unloaded into a cargo receiving tank on the side of ground facilities such as a gas station. On the other hand, when the collating unit 13 determines that the two liquid type information do not match, the bottom valve 4 of the tank chamber 3 instructed by the tank chamber instructing unit 12 is locked by the attached lock device 14. The closed lock continues, so that unloading from the tank chamber 3 becomes impossible. The liquid mixture prevention device 8 of the illustrated example operates in this way.

Note that, regardless of such an illustrated example, the lock device 14 is not the bottom valve 4 of each tank chamber 3 as described above, but the discharge port 7 in which the discharge pipes 5 from each bottom valve 4 are gathered.
A liquid mixture prevention device 8 additionally provided to the discharge valve 6 of FIG. Then, in the liquid mixture prevention device 8 provided with the lock device 14 as described above, when the collation means 13 determines that the two liquid type information match, such a discharge valve 6 of the discharge pipe 5 is attached. The closing lock by the locking device 14 is released. Therefore, the liquid loaded in the tank chamber 3 instructed by the tank chamber instructing means 12 passes through the opened bottom valve 4, the discharge pipe 5, the opened discharge valve 6 and the like to the gas station. Etc. is unloaded in the receiving tank on the ground equipment side. On the other hand, when the collating means 13 determines that the two liquid type information do not match, the discharge valve 6 of the discharge pipe 5 is continuously locked by the lock device 14 attached thereto. Therefore, even if the bottom valve 4 of the tank chamber 3 instructed by the tank chamber instructing means 12 is opened, it is impossible to unload the cargo to the cargo receiving tank on the ground facility side such as a gas station.

Further, in the illustrated example, a warning device 15 is attached to the liquid mixture prevention device 8 of the tank truck 1 as a display means. The display means is the matching means 13 as described above.
When it is determined that both liquid type information matches or does not match,
Although the corresponding display is performed, the warning device 15 in the illustrated example
When it is determined that the information on both liquids does not match, a warning to that effect is displayed, for example, by voice, and reliable information is transmitted to the operator as to whether or not the liquid to be unloaded is unloaded. It

Then, according to the liquid mixture prevention device 8 of the tank truck 1, the following first and second operations are performed. First
In the illustrated example, only when the loaded liquid type information of the tank chamber 3 and the unloading liquid type information instructed by the tank chamber instructing means 12 coincide with each other in the illustrated example, The lock is released, and in another example not shown, the discharge valve 6 of the discharge pipe 5 is unlocked. On the other hand, when the two liquid type information do not match, that is, even if an attempt is made to unload a liquid of a different type from the liquid to be unloaded due to some mistake, in the illustrated example, the bottom valve 4 of the tank chamber 3 Locking continues, and in another example, the discharge valve 6 of the discharge pipe 5
Will continue to be locked. That is, only when the liquid loaded in the tank chamber 3 to be unloaded matches the liquid to be unloaded, in the illustrated example, the unloading from the tank chamber 3 is possible, and in other examples, It is possible to unload the tank truck 1 from the tank 2. These are surely displayed and transmitted to the operator by the warning device 15. Now, in this way, only the liquid that should be unloaded into the cargo receiving tank on the side of the ground equipment such as a gas station can be accurately unloaded, and a mixed oil containing different types of liquid is mixed. Accidents and liquid mixture accidents are reliably prevented.

Secondly, this is a liquid mixture preventing device comprising a liquid type key 9, a loaded liquid type detecting means 10, an unloading liquid type detecting means 11, a tank chamber indicating means 12, a collating means 13, a lock device 14 and the like. 8 is installed in the tank truck 1,
High reliability is realized by a simple configuration. Moreover, the liquid type key 9 is used for the loaded liquid type detecting means 10 and the unloading liquid type detecting means 1.
It can be realized by an easy operation by only loading it in No. 1 and instructing the tank chamber instructing means 12.

First, in the liquid mixture prevention device 8 of the above-described embodiment, the lock device 14 locks or unlocks the bottom valve 4 and the discharge valve 6. However, irrespective of such an embodiment, the lock device 14 is of a type that also serves as a valve opening / closing device for the bottom valve 4 and the discharge valve 6, or an automatic opening / closing valve such as an electromagnetic opening / closing valve for the bottom valve 4 and the discharge valve 6. A type in which the lock device 14 is also used as the lock device is also considered. In the liquid mixture prevention device 8 of such a type, only when the collating unit 13 determines that the instructed liquid type information of the tank chamber 3 and the unloading liquid type information match each other. The bottom valve 4 or the discharge valve 6 of the tank chamber 3 is released from the state of being locked in the normally closed state and is switched from the closed state to the open state, so that the unloading is started. In the liquid mixture prevention device 8 of this type, a manual on-off valve is attached immediately downstream of the automated bottom valve 4 or the discharge valve 6 as described above, and this is opened and closed appropriately. If set to, safety is supplemented regardless of automation.

Secondly, the mixed liquid prevention device 8 according to the present invention.
Relates to the tank lorry 1 in which the tank 2 is divided into a plurality of tank chambers 3, but the technical idea can be applied to the tank lorry 1 in which the tank chamber 3 in the tank 2 is composed of only one chamber. That is, when the liquid is loaded in the tank 2, the loaded liquid type key 9 of the loaded liquid is loaded into one loaded liquid type detection means 10 to obtain the loaded liquid type information, and the loaded liquid type information is transferred from the tank 2. At the time of unloading, the liquid type key 9 of the liquid to be unloaded is loaded into the unloading liquid type detection means 11 to obtain the unloading liquid type information. Then, the collating means 13 compares the loaded liquid type information with the unloading liquid type information, and unlocks the lock device 14 of the bottom valve 4 and the discharge valve 6 only when the two match, so that the unloading can be performed. It is also possible to

[0035]

As described above, the tank lorry mixture preventing device according to the present invention includes the loaded liquid type detecting means using the liquid type key, the unloading liquid type detecting means, the tank chamber indicating means, and the like. In claim 1, the bottom valve is unlocked only when the matching means matches the information between them, in claim 2, the discharge valve is unlocked, and in claim 3,
By additionally providing a display means, the following effects are exhibited.

First, the liquids to be unloaded are accurately unloaded, and the occurrence of mixed liquid accidents of liquids of different types is prevented. That is, only the liquid to be unloaded can be accurately unloaded without relying on visual observation or memory as in the conventional example of this kind described above, and in the receiving tank on the ground facility side such as a gas station. It is possible to surely prevent the oil mixture accident and the liquid mixture accident in which different kinds of liquids are mixed. Therefore, while avoiding danger and improving safety,
There is no need to take time and effort to restore the mixed liquid accident.

Second, and yet this is simple, easy and reliable. That is, unlike the conventional example of this kind described above, there is no problem in reliability and cost,
It has a simple structure, is excellent in cost, is easy to operate, and is highly reliable. As described above, the effects of the present invention are remarkably large, such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

FIG. 1 is an overall explanatory view showing an embodiment of a mixed liquid prevention device for a tank truck according to the present invention.

2A and 2B are perspective views of a liquid type key of the same embodiment, wherein FIG. 1A shows a groove type, FIG. 2B shows a hole type, and FIG. 3C shows a magnetic type.

FIG. 3 is a perspective view of an example of a controller of the same embodiment.

FIG. 4 (1) is a rear view of the tank truck,
(2) FIG. 6 is a perspective view of another example of the controller of the same embodiment.

[Explanation of symbols]

 1 Tank Lorry 2 Tank 3 Tank Chamber 4 Bottom Valve 5 Discharge Pipe 6 Discharge Valve 7 Discharge Port 8 Mixture Prevention Device 9 Liquid Type Key 10 Loaded Liquid Type Detecting Device 11 Unloading Liquid Type Detecting Device 12 Tank Chamber Indicating Device 13 Collating Device 14 Lock Device 15 Warning device (display means)

Claims (3)

[Claims] 1. A tank truck in which a tank is divided into a plurality of tank chambers, a bottom valve is provided in each of the tank chambers, and unloading from each of the tank chambers is performed through each of the bottom valves. A mixed liquid prevention device for preventing a liquid different from the liquid to be unloaded from being unloaded, and for each type of liquid such as gasoline, light oil, kerosene, etc. to be loaded and unloaded in the respective tank chambers. The corresponding liquid type key prepared in advance and the liquid type key provided for each of the tank chambers are loaded with the liquid type key of the liquid to be loaded when the liquid is loaded in each of the tank chambers. Loaded liquid type detection means for obtaining liquid type information, and an unloading liquid type detection means for obtaining the unloading liquid type information by loading the liquid type key of the liquid to be unloaded at the time of unloading At any time, any of the tank chambers to be unloaded Tank chamber instructing means, the loading liquid type information from the loading liquid type detecting means for the tank chamber instructed by the tank chamber instructing means, and the unloading liquid from the unloading liquid type detecting means Collating means for comparing the liquid type information with each other to determine whether or not the two liquid type information match, and a bottom valve of each of the tank chambers, and the collating means determines that the two liquid type information match. And a locking device for unlocking the bottom valve of the tank chamber only when the tank chamber is closed. 2. The tank lorry mixture prevention device according to claim 1, wherein the locking device is not attached to a bottom valve of each of the tank chambers to lock and unlock the bottom valve of the tank chamber. The lock device is attached to the discharge valve of the discharge port where the discharge pipes from the bottom valve of each tank chamber are gathered, and only when it is determined by the collating means that the two liquid type information match. A device for preventing liquid mixture in a tank truck, wherein the discharge valve at the outlet is unlocked. 3. The tank lorry mixture prevention device according to claim 1 or 2, further comprising a display for performing a corresponding display when the collating means determines that both liquid type information matches or does not match. A device for preventing the mixture of a tank truck from being provided with a means.