JPH0159199B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention is used in the field of a tank truck having a plurality of bottom valves, which allows simultaneous discharge from each bottom valve using a pump or its own weight. .

(b) Prior art In general, in a tank truck having a plurality of bottom valves, it is possible to speed up the work by making it possible to discharge water from one bottom valve using a pump and at the same time independently discharge water from the other bottom valve under its own weight. It is desired because of its purpose.

Therefore, conventionally, as shown in Fig. 1, a plurality of bottom valves are divided into front and rear parts, each of the front bottom valves 01... is connected to the front main pipe 02 and the branch pipe 03, and each of the rear bottom valves 04... ...rear main piping 05 and branch piping 0
A communication pipe 08 is connected between both branch pipes 03 and 06 via three-way valves 07 and 07, and an auxiliary pipe 09 in which a pump P is interposed is connected to the communication pipe 08 via a four-way valve. A structure connected via 010 is implemented.

However, with the above structure, for example, if the front bottom valve side is discharged to the left side (lower side in Figure 1) by pumping, the rear bottom valve side can only be discharged to the right side (upper side in Figure 1) or to the rear by discharging its own weight. This had the disadvantage of poor work efficiency because it could not be discharged and could not be discharged in the same direction as the front bottom valve side.

(c) Purpose of the Invention In order to eliminate the above-mentioned drawbacks, the present invention connects the front and rear main pipes with a first communicating pipe, connects both branch pipes with a second communicating pipe, and connects both communicating pipes. The purpose is to connect with an auxiliary pipe equipped with a switching valve and a pump, and to enable pump discharge and self-weight discharge in either direction at the same time.

(d) Structure of the Invention The present invention provides a tank truck having a plurality of bottom valves, in which at least one bottom valve located at the front of the bottom valves is connected to a front main pipe, and at least one bottom valve located at the rear is connected to a front main pipe. At least one bottom valve is connected to the rear main pipe, each of the main pipes is connected to at least a branch pipe extending in the left and right direction, and a first communication pipe and a second communication pipe are connected between the two main pipes and between the two branch pipes. The pipes are connected, and an auxiliary pipe having a first switching valve and a pump is provided between the two communication pipes, and a connecting portion between the first communication pipe and each main pipe, and a connection portion between the second communication pipe and the auxiliary pipe. A second switching valve and a third switching valve are installed at the connecting parts of the
The present invention relates to a discharge device for a tank lorry, which is provided with a switching valve and a fourth switching valve, respectively.

(e) Embodiment An embodiment will be described below with reference to the drawings. 1... is a plurality of bottom valves provided in a tank truck. The bottom valves 1... are divided into two at the front and two at the rear, the front bottom valves 1, 1 are connected by the front main pipe 2, and the rear bottom valves 1, 1 are connected by the rear main pipe 3. ing.

The main pipes 2 and 3 are connected to branch pipes 4 and 5 extending laterally and rearward, respectively.

A first communication pipe 6 is connected to both the main pipes 2 and 3, and a second communication pipe 7 is connected between both the branch pipes 4 and 5.

An auxiliary pipe 8 is connected between the two communication pipes 6 and 7, and a first switching valve 9 consisting of a four-way valve and a pump P are interposed in the auxiliary pipe 8.

A second switching valve 10, which is a three-way valve, is provided at the connection between the first communication pipe 6 and the front main pipe 2, and a three-way valve is provided at the connection between the first communication pipe 6 and the rear main pipe 3. A third switching valve 11 is provided respectively.

Further, a fourth switching valve 12 consisting of a three-way valve is provided at the connection portion between the second communication pipe 7 and the auxiliary pipe 8.

13... are on-off valves provided at each end of each branch pipe 4, 5.

The present invention has the above-mentioned structure, and the operation will be explained next. When pump discharge is performed from the rear bottom valve, the first switching valve 9, the third switching valve 11, and the fourth switching valve 12 as shown in the symbol mark, and open the on-off valve 13 on the branch pipe 5 located in the discharge direction.

After that, open the rear bottom valve 1 and pump P.
When started, the liquid discharged from the bottom valve 1 is discharged through the rear main pipe 3, the first communication pipe 6, the auxiliary pipe 8, the second communication pipe 7, and the branch pipe 5 as shown by the solid arrow.

In addition, when discharging the pump from the front bottom valve and discharging dead weight from the rear bottom valve at the same time, as shown in Fig. 3b, the first switching valve 9, the second switching valve 10, and the third switching valve 1
The first and fourth switching valves 12 are switched as shown in the symbol mark, and the branch pipes 4 and 5 located in the discharge direction are
Open the upper on-off valves 13, 13.

After that, when the front and rear bottom valves 1... are opened and the pump P is started, the liquid discharged from the rear bottom valve 1 is discharged by weight through the rear main pipe 3 and branch pipe 5 as shown by the solid line arrow. The liquid discharged from the front bottom valve 1 is transferred to the front main pipe 2 as shown by the dotted arrow.
It is pumped out through the first communication pipe 6, the auxiliary pipe 8, the second communication pipe 7, and the branch pipe 4.

At this time, the discharge directions of both can be the same or different by arbitrarily selecting the on-off valve.

In addition, when loading liquid into a tank truck, in a bottom loading type (a method in which loading is performed through a bottom valve), the first switching valve 9, the second switching valve 10, and the fourth switching valve are connected as shown in Fig. 3c. 12 as shown in the symbol mark, open the front bottom valve 1, and start the pump P. The liquid flows through the branch pipe 5, the second communication pipe 7, the auxiliary pipe 8, the first communication pipe 6, and the front main pipe as shown by the solid arrow. Loaded through 2.

At this time, if the same liquid is to be simultaneously loaded on the rear bottom valve 1... side, simultaneous loading can be performed simply by switching the third switching valve 11.

(f) Effects of the Invention As described above, the present invention connects the front and rear main pipes with the first communication pipe, connects both branch pipes with the second communication pipe, and connects both the communication pipes with a switching valve and a pump. They are connected by auxiliary piping, and each connection is provided with a switching valve, so pump discharge and self-weight discharge can be performed at the same time from each bottom valve, and the discharge direction can be the same or different. You can also do this as you like, increasing the efficiency of the discharge work.

[Brief explanation of drawings]

FIG. 1 is a conventional example, FIG. 2 is an overall view of the present invention, and FIG. 3 is an operating state diagram. 1 is the bottom valve, 2 is the front main pipe, 3 is the rear main pipe, 4,
5 is a branch pipe, 6 is a first communication pipe, 7 is a second communication pipe, 8 is an auxiliary pipe, 9 is a first switching valve, 10 is a second switching valve, 11 is a third switching valve, 12 is a fourth switching valve valve.

Claims (1)

[Claims] 1 In a tank truck with multiple bottom valves,
Among the bottom valves, at least one bottom valve located at the front is connected to the front main pipe, and at least one or more bottom valve located at the rear is connected to the rear main pipe,
A branch pipe extending at least in the left-right direction is connected to each of the main pipes, and a first communication pipe and a second communication pipe are connected between the two main pipes and between the two branch pipes,
An auxiliary pipe having a first switching valve and a pump is provided between the two communication pipes, and a connecting part between the first communication pipe and each main pipe and a connection part between the second communication pipe and the auxiliary pipe is provided. A discharge device for a tank lorry, which is provided with a second switching valve, a third switching valve, and a fourth switching valve, respectively.