JPS6130989B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to providing a tank truck that can load and unload with high efficiency.

In tank trucks, the interior of the tank is usually divided into multiple tank chambers so that different types of liquids can be transported.

The bottom valve of the tank chamber and the discharge valve communicating with the discharge hose are communicated by piping.

That is, in the conventional system, in the example shown in FIG. 1, the discharge valves 1, 2, and 3, which are disposed on each side of the vehicle and at the rear, are communicated with each other through pipes 4 and 5 for mutual communication. The bottom valves 6, 7, 8, and 9 are connected to one pipe 10 through a pipe 11, and a four-way valve 12 is provided in the middle of the pipe 11.
A transfer pump 13 is disposed via.

This device discharges the liquid in the tank chamber by gravity (not via the transfer pump 13) or by a pump (via the transfer pump 13) by operating the four-way valve 12, or conversely, the liquid in the tank chamber is discharged by gravity (not via the transfer pump 13) or by a pump (via the transfer pump 13). Inhalation and loading can be carried out by the transfer pump 13.

However, when loading a different type of liquid, such as gasoline or diesel oil, into a tank chamber and unloading it from a gas station, etc., the use of the transfer pump 13 is regulated, so the unloading must be done by gravity.
At this time, each tank chamber is connected, so only one type of liquid can be unloaded at a time, which increases unloading time and reduces work efficiency.Furthermore, fuel sales must be suspended during this time. This is not favorable from a business standpoint either.

Therefore, in the example shown in FIG. 2, for each bottom valve 6, 7, 8, 9, the piping 6a,
7a, 8a, 9a and discharge valves 6b, 7b, 8b, 9
b.

In this case, each tank chamber is not in a communication relationship, so the liquid in each tank chamber can be drained at the same time, which is efficient, but it is complicated to connect the transfer pump to each piping, so In the case of this type of equipment, transport pump equipment is abandoned and unloading is performed using gravity alone.

However, this cannot be used when reloading from a tank truck or unloading to an above-ground tank due to an accident or breakdown of the tank truck.

In view of the above points, the present invention has been made in order to provide a tank truck equipped with a transfer pump that is highly efficient even when unloading mainly by gravity. Those with two receiving tanks for the same type of liquid, or two
In this case, the present invention aims to reduce the unloading time by half by using two hoses for unloading by gravity. However, the interior of the tank is divided into a plurality of tank chambers, and an appropriate number of tank chambers are connected to the first tank chamber through bottom valves provided in each tank chamber.
The pipe is provided with a second pipe that communicates with another tank chamber through a bottom valve provided in each of the tank chambers, and the first pipe is connected to the first pipe by switching the switching valve that communicates with the first pipe and the second pipe. , the second pipe is alternately switched to communicate with the suction port and the discharge port of the transfer pump, and discharge valves communicating with the discharge hose are provided in the first pipe and the second pipe, respectively. The details thereof will be explained below based on the drawings of the embodiments.

That is, in the embodiment shown in FIG.
The pipe 14 communicates with the bottom valves 6 and 7, and also communicates with both sides of the vehicle.
It has discharge valves 15, 16, 17 extending to the rear,
Further, the second pipe 18 communicates with the bottom valves 8 and 9, and extends to both sides of the vehicle and to the rear of the vehicle, and is connected to discharge valves 19, 20, 21.
have.

That is, two discharge valves are provided on both sides of the vehicle and at the rear. A bifurcated piping section 23 is constructed between the first piping 14 and the second piping 18 via three-way switching valves 22, 22', and a transfer pump 13 is disposed between the bifurcated piping.

According to this, if there are two receiving tanks for two different liquids or the same type of liquid, or if there are two receiving ports for hoses, unloading will be carried out by gravity. This can also be done by using two discharge platforms, which can reduce the unloading time by half.Also, even in an emergency, the transfer pump 13 can be used for suction and discharge.Furthermore, First pipe 14 and second pipe 1
8 can be made independent of each other by operating the switching valve 22 or 22', so it is possible to simultaneously unload the liquid in the tank chamber communicating with the first pipe 14 and the liquid in the tank chamber communicating with the second pipe 18 by gravity. It is.

The embodiment shown in FIG. 4 differs from the one in FIG. 3 only by changing the orientation of the three-way switching valves 22, 22'.
However, when operating the handle of a switching valve, for example,
The only difference is that the operating angle from the neutral (gravity discharge) position in Fig. 3 is that both switching valves are operated in the same direction and at the same angle, whereas that in Fig. 4 is not the same. .

In the embodiment shown in FIG. 5, three-way switching valves 24, 24' are provided in the first pipe 14 and the second pipe 18, and a four-way switching valve 2 is provided in the communication pipe 25 between them.
A transfer pump 13 is disposed via 6.

Compared to the ones in FIGS. 3 and 4, the four-way switching valve 26
The difference is that it requires the following operations.

FIG. 6 is an overall view of a tank truck having such a configuration.

As mentioned above, with the transfer pump equipment, high efficiency of unloading by gravity and simultaneous unloading of different types of liquids are possible.
and the second pipe 18 are alternately switched to communicate with the suction port and the discharge port of the transfer pump 13, and the first pipe 1
By using the discharge hose of the second piping 18 for suction and discharge by the pump 4, and by using the discharge hose of the first piping 14 for suction and discharge by the pump of the second piping 18, the structure is simple and the switching operation is easy. This allows suction and discharge using a pump.

Furthermore, it is possible to transfer the tank from one tank room to another, which is not possible with conventional tank trucks.

Although not shown in the drawings, the transfer pump 13 is provided with a relief valve to prevent overload during switching or at the neutral position.

Various other embodiments of the present invention are possible, which are schematically illustrated as shown in FIG. 7.

In the figure, A indicates a two-way switching valve, B indicates an open type four-way switching valve, B' indicates a closed type four-way switching valve, C indicates an open type three-way switching valve, and C' indicates a closed type three-way switching valve. The switching configurations of the four-way and three-way switching valves are as shown in FIG.

The one shown in FIG. 7c is an example in which the structure is simplified using a closed type four-way switching valve RO'.

In the case shown in Fig. 7d and e, when the transfer pump 13 is used, both the first pipe 14 and the second pipe 18 are connected to the pipe 1.
4 discharge valves are used, and during gravity discharge, each discharge valve is used, but in Figures 3, 4, and 5, Figure 7 a,
The one shown in c is the first one when the transfer pump 13 is used.
The pipe 14 uses the discharge valve of the second pipe 18, and
The discharge valve of the first pipe 14 is used for the pipe 18, and the respective discharge valves are used for gravity discharge.

The closed type four-way switching valve already described in FIG. 8 can be manufactured in a unique manner by applying slight processing to an existing open type four-way switching valve. That is, in the developed perspective view shown in FIG. 9, the valve 27 may be provided with a partition plate 28 that requires a slight processing.

In the figure, 29 is a valve 27 mounting member, 30 is a relief member 31, a valve seat frame, and A, B, C, and D are four holes, respectively.

This is illustrated in detail in a vertical sectional view as shown in FIG. 10.

That is, the partition plate 28 closes the communicating holes C and D in the case of the existing open type four-way switching valve.

That is, in A in the switching mode diagram of FIG. 11, C and D are closed and only A and B are in communication.

The switching modes shown in B and C in the same figure are the same in the case of the existing open type.

In addition, in the case of an open type, the holes C and D normally face each other on the center line of the valve seat circle, but in the case of a closed type, since a partition plate 28 is attached as shown in the figure, it is difficult for this to protrude into the hole C or D. Naki-sama, hole C, D
is located slightly lower.

[Brief explanation of the drawing]

Figures 1 and 2 are piping configuration diagrams in a conventional tank truck, Figures 3 to 5 are piping configuration diagrams of the present invention, Figure 6 is an overall diagram of the tank truck of the present invention, and Figure 7 is the piping configuration of the present invention. A schematic diagram of the configuration, FIG. 8 is an explanatory diagram of the switching form of the switching valve, FIG. 9 is an exploded perspective view of the closed type four-way switching valve of the present invention, and FIGS. 10 a and b
is a longitudinal cross-sectional view of a closed type four-way switching valve, A- in figure a.
The A-line sectional view and FIG. 11 are diagrams showing the switching mode of the closed type four-way switching valve. 13... Transfer pump, 14... First piping, 18
...Second piping, 15, 16, 17, 19, 20,
21...Discharge valve, A...Two-way switching valve, B...Open type four-way switching valve, B'...Closed type four-way switching valve, C...Open type three-way switching valve, C'...
... Closed type three-way switching valve.

Claims (1)

[Claims] 1 The inside of the tank is divided into a plurality of tank chambers, and the first piping is connected to an appropriate number of tank chambers through the bottom valves provided in each, and the other tank chambers are connected through the bottom valves provided in each. and a second pipe communicating with the first pipe, and by switching a switching valve communicating with the first pipe and the second pipe, the first pipe and the second pipe are connected to an inlet port and a discharge port of a transfer pump. The first piping is alternately switched for communication, and
A tank truck characterized in that the second pipes are provided with discharge valves communicating with respective discharge hoses.