JPH0321440B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a bottom-loading piping structure in a tank truck. This relates to a bottom-loading piping structure that allows cargo to be unloaded from the rear. This is used in the field of tank trucks that load and transport liquids of the same or different types into multiple tank chambers.

[Conventional technology]

Tank trucks that transport the same or different types of liquids store different types of liquids, such as gasoline, kerosene, and diesel oil, individually in each tank room.
It has a tank room separated into multiple rooms. Tank trucks load liquids to be transported to oil refineries and other locations, transport them to gas stations and other locations, and then unload them into underground storage tanks.

In recent years, when loading and unloading liquids onto tank trucks, bottom loading methods have been adopted, which can streamline cargo handling operations such as filling and discharging. As an example, there is a bottom loading method for a tank truck described in Japanese Unexamined Patent Publication No. 58-90097. In loading operations using this method, liquid can be loaded from the bottom of the tank instead of injecting liquid from above the tank chamber as in conventional methods, and evaporated gas generated in the tank chamber can be removed from the tank via an operating valve. It can be collected through a return pipe into a storage tank. This eliminates the need for workers to climb to the top of the tank, open the manhole cover, or operate the gas return, ensuring safety during loading operations and improving work efficiency.

[Problem to be solved by the invention]

By the way, when it comes to liquid supply equipment at loading terminals, the direction of the vehicle body at the stop location is determined.
The connection port of the supply piping device can only be connected to the left side of the tank truck. In other words, it is standard for bottom-loading tank trucks to have piping equipment for loading and unloading only on the left side of the tank in accordance with work at the loading base. On the other hand, at gas stations and the like, the installation position of the storage tank unloaded by the standard tank truck as described above is not necessarily on the left side of the vehicle body. Furthermore, there are cases where the tank truck cannot find a convenient stopping position for unloading work.
In such cases, in order to utilize the loading piping installed on the left side of the car body for unloading, it is necessary to connect a long hose to the piping equipment on the left side and guide the liquid with that hose. It's time consuming. As a result, workers are forced to repeatedly attach and detach long hoses, which are cumbersome to handle, under the cramped space of the tank truck.Furthermore, liquid may remain in the hose, requiring extra effort to drain the hose. It will be done. As a result, there is a problem that the efficiency of unloading work and the safety of work are impaired.

For example, Japanese Patent Application Laid-Open No. 59-84781 discloses that, for example, on the left side of the vehicle body, each tank compartment is provided with an independent regular cargo handling pipe, and the independent pipe can be removably connected at its connection port. A cargo handling piping system is disclosed in which a U-shaped auxiliary piping is added. The auxiliary pipe changes the direction of the flow of gasoline flowing out from the independent pipe along a roughly U-shaped passage, and if it is connected to the independent pipe, it becomes a centralized pipe for discharging to the right side of the vehicle body. It is now possible to send liquid to. The centralized piping is in communication with any of the auxiliary pipings, and from the independent piping to which the auxiliary piping is connected, the liquid stored in the tank chamber connected to the independent piping can be discharged to the other side.

However, since the auxiliary piping is installed in advance for each independent piping provided in each tank chamber, the number of parts in the piping system increases significantly. Furthermore, the auxiliary piping is required to have a rotation mechanism for changing its position in order to connect with the independent piping, and it must be installed structurally and on the vehicle body to prevent liquid leakage and to ensure high connection accuracy. Various measures must be taken from the viewpoint of safety.

In addition, all auxiliary piping is in communication with one central piping, so if cargo is simultaneously unloaded from one independent piping to one side and from another independent piping to the other side via the auxiliary piping. In this case, the liquid introduced into the central piping leaks out from the unconnected auxiliary piping that corresponds to the independent piping that is unloading to one side, and is discharged to the other side as desired. I feel weak. To avoid this,
If an on-off valve is provided at the connection port of the auxiliary pipe, the on-off valve must be operated each time during unloading work, which significantly reduces the operability of the work. Furthermore, the cargo handling piping system becomes expensive due to the increase in the number of additional parts.

The present invention was created in view of the above-mentioned problems, and its purpose is to make it possible to easily unload liquid loaded in a multi-chamber tank from the left, right, and rear sides of the vehicle body, and to allow the liquid to be easily unloaded from the left, right, and rear sides of the vehicle body. A bottom-row tank truck that can unload liquid from different tank chambers at the same time, significantly improving the efficiency of unloading work, ensuring work safety, and simplifying the piping system attached to the vehicle body and reducing costs. The object of the present invention is to provide a piping structure based on the dewing method.

[Means to solve the problem]

INDUSTRIAL APPLICATION This invention is applied to the piping system of the tank truck of a bottom loading type which loads or unloads the conveyance liquid from the bottom of a multi-chamber tank.

Its characteristics are as shown in Figure 1.
A first pipe 5 for loading or unloading for each tank chamber 2A to 2F is provided on the regular cargo handling side, which is one side of the multi-chamber tank 2, to form a regular cargo handling pipe group. One or two second pipes 8 are attached to the other side 7 or the rear 4 of the chamber tank 2. A removable flexible hose 11 is provided to communicate the first pipe 5 of the regular cargo handling pipe group with the second pipe 8, and the flexible hose 11 connected to the second pipe 8 is provided. , the first pipe 5.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof.

FIG. 1 is a plan view of a piping system in which the piping structure of the present invention is applied to a standard tank truck 1 of the bottom loading type. The multi-chamber tank 2 of this example has six adjacent tank chambers 2A to 2F (first to sixth chambers).
The liquid discharge ports 3A to 3F are provided at the bottoms 2a to 2f of each of the chambers. The multi-chamber tank 2 is mounted on the vehicle body 1A of the tank lorry 1 in an inclined state toward the rear 4 as shown in FIG. 2 in order to reduce residual liquid when discharging the liquid.

The six pipes 5A to 5F constituting the first pipe 5 that communicate with each of the supply and discharge ports 3A to 3F are formed as a regular cargo handling pipe group, and are located at the position of the supply piping device in the liquid supply equipment of the loading base (not shown). In addition, it is installed independently below each of the tank chambers 2A to 2F shown in FIG. 2 on the left regular cargo handling side, which is one side 6 of the multi-chamber tank 2. And piping 5A
The end openings 5a to 5f of ~5F (see Figure 1) are
The adapter of the above-mentioned supply piping device or the end opening 11 of the flexible hose 11 (described later) is connected via the manual switching valve 9.
It is formed so that it can be connected to a.

On the other hand, on the left side 7 of the multi-chamber tank 2 shown in FIG. It is attached below 2. Furthermore, the ends 8a, 8 of those T-shaped tubes 8A, 8B
Pipes 8M and 8N extending toward the rear 4 are connected to b via the manual switching valve 14, with the piping 8M extending toward the left side 6 and the piping 8N extending toward the right side 7.

These second pipes 8 are liquid passages from the first pipe 5 for unloading the transported liquid to the left side 7 or the rear 4, and are connected to the T-shaped pipes 8A, 8B and the pipes 8 as described above.
It is composed of M, 8N, etc. For example, T
The T-shaped tube 8A and the piping 8M supply the liquid in the tank chambers 2A to 2C that communicate with the piping 5A to 5C, and the T-shaped tube 8B and the piping 8N supply the liquid in the tank chamber 2 that communicates with the piping 5D to 5F.
Liquids from D to 2F can be used to unload to the right side 7 or the rear 4.

By the way, if the number of tank chambers is six, for example, and the number of second pipes 8 is set to four to six, the cost for the equipment will increase, and the lower part of the narrow multi-chamber tank 2 will be even more complicated and heavy. This makes unloading work difficult, so the number is limited to one to three, for example. In other words, the piping cost can be reduced while the unloading function of the tank truck 1 can be sufficiently maintained. In addition, since liquids are unloaded from either the right side 7 or the rear 4,
In place of the T-shaped pipes 8A and 88B, the shape of the second pipe 8 is a pipe 15 for unloading to the right side 7 shown in FIG.
A, 15B or straight pipes such as pipes 16A and 16B for unloading to the rear 4 shown in FIG. 4 may be bent pipes.

The flexible hose 11 shown in FIG.
The pipes 5A to 5F are connected to the T-shaped pipes 8A and 8B in the second pipe 8 (see FIG. 1),
It is used when unloading the transported liquid to the right side 7 or rear 4 of the tank 2. The detachable flexible hose 11 is composed of a flexible bellows rubber hose 11A and a bent pipe 11B. the other end 11b
The T-shaped tubes 8A and 8B are connected via the cam lock 11c.
It is designed so that it can be connected to the tip portions 8c and 8d (see Fig. 1) of. That is, the flexible hose 11 connected to the second pipe 8 can be selectively connected to the first pipe 5.

According to the embodiment having such a configuration, it is possible to safely and efficiently unload cargo from the multi-chamber tank 2 of the tank truck 1 as described below.

At the loading base, the tank truck 1 disperses, for example, gasoline, kerosene, light oil, etc., as appropriate from a supply piping device, loads the gas into tank chambers 2A to 2F, and transports the gas to a gas station. When unloading cargo that has arrived at a gas station, if there is a storage tank at the left side 6 of the tank truck 1 shown in FIG. The conveyed liquid is unloaded into the storage tank without using the two pipes 8.

When the storage tank is installed at the right side 7 of the tank lorry 1, the liquid is caused to flow in the direction of the arrow 12 from the first pipe 5 toward the right side 7 in the piping schematic diagram of FIG. In that case, while connecting the piping 5A and the end opening 11a of the flexible hose 11,
Connect the other end 11b to the tip 8c of the T-shaped tube 8A,
The manual switching valve 14 at the end 8c is kept closed. When the end opening 11a of the flexible hose 11 is connected to the tip of the piping 5A as shown, the piping 5A is automatically opened by the closing mechanism in the tip. On the other hand, the end 8 located on the right side 7 of the T-tube 8A
Connect the cam lock of the hose on the storage tank side to e, and finally open the manual switching valve 9. The liquid in the tank chamber 2A is taken out to the right side 7 and stored in the storage tank via a hose connected to the storage tank side connected to the end 8e.

When the same operation is performed for the tank chambers 2A and 2C, the liquid is taken out and stored. On the other hand, the same applies when taking out the liquid from the tank chambers 2D to 2F. It goes without saying that the two tank chambers can be discharged simultaneously using the two second pipes 8A and 8B. In addition, the straight pipe 1 shown in Figure 3
It is almost the same when unloading toward the right side 7 using 5A.

FIG. 7 shows a case where the storage tank is located at the rear position 4, and the liquid is taken out in the direction of arrow 13. T-tube 8A
When the manual switching valve 14 at the end 8a is opened, liquid can be taken out from the tank chamber 2A to the rear 4 and unloaded. Note that the end 8e of the T-shaped tube 8
If the hose on the storage tank side is not connected to the end 8e, the closing mechanism in the end 8e will prevent liquid from flowing out there. In this way, the flexible hose 11 connected to the second pipe 8 is selectively connected to the first pipe 5, and the liquid to be transported in each tank chamber can be unloaded or loaded from the right side or the rear. .

〔Effect of the invention〕

As can be seen from the detailed description of the embodiments above, the present invention provides a first pipe for loading or unloading cargo into each tank chamber independently on one side of the tank, and a second pipe on the other side or rear side. Since the first pipe is selectively connected with a removable flexible hose that connects the first pipe and the second pipe, the storage tank to be unloaded is not limited to the left side of the multi-chamber tank, but also the right side of the multi-chamber tank. By connecting flexible hoses to the necessary points, the liquid transported in each tank chamber can be unloaded from the right side or rear. Therefore, the conventional work of repeatedly attaching and detaching a long hose under a narrow multi-chamber tank is eliminated, work safety is increased, and the piping system can be simplified and lowered in cost. This will also improve the efficiency of unloading operations. In addition, for standard tank trucks that adopt the bottom loading method, liquid can be unloaded from different tank chambers to one side and the other at the same time, making cargo handling operations more diverse and faster, and the tank truck It is possible to improve overall transportation and operability.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main parts of the piping system of a bottom-loading tank truck to which the piping structure of the present invention is applied, Fig. 2 is a view taken along the - line in Fig. 1, and Figs. 3 and 4 are Different examples of piping, FIG. 5 is an external view of a flexible hose in an attached state, and FIGS. 6 and 7 are schematic diagrams showing various aspects when taking out liquid from a multi-chamber tank. 1...tank truck, 2...multi-chamber tank, 2A~2
F tank room, 2a to 2f...bottom, 4...rear, 5,
5A to 5F...First piping, 6...One side (left side), 7
...Other side (right side), 8, 8A, 8B, 15A, 1
5B, 16A, 16B...second piping, 11...flexible hose.

Claims (1)

[Scope of Claims] 1. In a piping system for a bottom-loading tank truck that loads or unloads transported liquid from the bottom of a multi-chamber tank, on one side of the multi-chamber tank, which is the regular cargo handling side,
A first pipe for loading or unloading is provided for each tank room to form a regular cargo handling pipe group, and in addition, one or two second pipes are installed on the other side or rear of the multi-chamber tank. A removable flexible hose is provided that connects the first pipe of any of the regular cargo handling pipe groups with the second pipe, and the flexible hose connected to the second pipe is connected to the first pipe. A bottom-loading piping structure for a tank truck, characterized in that it is selectively connected to any of the piping.