JPS636440B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge pipe for a tank lorry, and particularly to a discharge pipe capable of performing both dead weight discharge and pressure discharge.

In the case of a tank truck with a general multi-chamber tank, each chamber of the tank is provided with a bottom valve, and an independent pipe that can be connected to a hose at the tip extends from the bottom valve, and the independent pipe is connected to a gas station, etc. By communicating with the underground tank via a hose, the liquid in the tank can be discharged by its own weight into the underground tank.

However, the discharge location is not necessarily limited to underground tanks, but may also be storage tanks installed above ground. In that case, the liquid in the tank must be pumped above the storage tank, and the liquid There was a problem that it could not be discharged using its own weight alone.

In order to solve the above-mentioned problems, the present invention provides an independent pipe extending from a bottom valve and a central pipe interposed with a pump in the vehicle body, and selectively connects the independent pipe to the central pipe via a communication device. This allows for communication.

The following embodiment will be explained with reference to the drawings. 1 is the vehicle body 2.
The inside of the tank 1 is divided into a plurality of chambers 3....

A bottom valve 4 is provided at the bottom of each of the chambers 3, and the liquid in the tank 1 is discharged by opening and closing the bottom valve 4.

An independent pipe 5 extends from the bottom valve 4, and the independent pipe 5 is combined with a straight pipe so that its tip is located on the same horizontal line on the side of the vehicle body 2. There is.

Further, an on-off valve 6 is interposed in the independent pipe 5, and a connecting fitting 8 for connecting a hose 77 is provided at the tip thereof.

Reference numeral 9 denotes a centralized piping arranged longitudinally with the tank 1 below the independent piping 5 . . . At the front of the centralized piping 9 is a communication device for selectively communicating the centralized piping 9 with the independent piping 5 . 10..., a pump 11 for pumping and discharging the liquid in the tank 1 to a high place or a remote place is provided at the rear, and an on-off valve 12 is further provided at the rear.

Next, the communication devices 10... will be explained. Since each communication device 10... has the same structure, one explanation will be given.
A circular opening 14 is formed at the tip of the auxiliary pipe 13.

A communication pipe 15 is provided at the tip of the auxiliary pipe 13 to communicate the auxiliary pipe 13 with the independent pipe 5,
The communication pipe 15 is composed of a cylindrical part 16, a bent pipe part 17, and a male thread 18.

The cylindrical portion 16 has a size that sufficiently covers the opening 14 of the auxiliary pipe 13, and is restricted by a snap spring 19 so that it can only rotate.

The base end of the curved tube section 17 is welded to a part of the cylindrical section 16, and by rotating the curved tube section 17, the curved tube section 17 communicates with the opening 14. A male thread 18 is formed, and is adapted to be screwed into a female thread 20 on the inner surface of the connecting fitting 8. 21 is an above ground storage tank.

In addition, in the embodiment, each communication device is provided with auxiliary piping branched from the central piping, but one auxiliary piping is branched from the central piping, and communication pipes corresponding to independent piping are provided on the auxiliary piping. Even if it is provided rotatably, similar effects can be obtained.

Further, in the embodiment, the opening of the auxiliary pipe is closed by the cylindrical portion of the communication pipe, but an on-off valve may be provided on the auxiliary pipe to ensure more reliable closure.

Next, the operation of the present invention will be explained. First, when discharging into an underground tank of a gas station, as shown in FIG. ,
The communicating pipe 15 is rotated downward, and a hose 7 communicating with an underground tank is connected to the tip of the independent pipe 5 using a connecting fitting 8.

Thereafter, the bottom valve 4 and the on-off valve 6 are opened to discharge the liquid contained in the chamber 3 under its own weight into the underground tank.

Next, when discharging to the storage tank 21 on the ground as shown in FIG. 1, the communication pipe 15 is rotated upward as shown in FIG. The male thread 18 of is screwed into the female thread 20 of the connecting fitting 8 to connect the independent pipe 5 and the centralized pipe 9.

In this state, by opening the bottom valve 4 and the on-off valves 6 and 12 and operating the pump 11, the liquid in the chamber 3 is transferred to the storage tank 21 through the independent pipe 5, the communication pipe 15, the auxiliary pipe 13, and the central pipe 9. It can be pumped out.

At that time, the opening 1 of the other auxiliary pipes 13, 13
4 and 14 are closed by the cylindrical portions 16 and 16, so that no air enters the central pipe 9.

As described above, in the present invention, independent pipes extend from each bottom valve, and a central pipe equipped with a pump is separately provided, and the central pipe is provided with a communication device corresponding to the independent pipe. By rotating a part of the communicating pipe, it is possible to connect the independent piping and the centralized piping, and by rotating the communicating pipe, the opening of the communication device can be opened and closed. The liquid contained in the chamber can be discharged by gravity and by pressure, and furthermore, the discharge by gravity and by pressure can be simultaneously discharged for each chamber.
In addition, switching between self-weight discharge and pressure-fed discharge can be done simply by rotating the communication pipe, which greatly improves work efficiency.
Furthermore, by simply providing a central piping and a communication device, a conventional tank truck can be used as is, and it can be manufactured at a very low cost.

[Brief explanation of the drawing]

1 is an overall view, FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1, FIG. 3 is an enlarged sectional view taken along line BB in FIG. 2, and FIG. 4 is an operating state diagram. 1 is a tank, 4 is a bottom valve, 5 is an independent pipe, 9 is a central pipe, 10 is a communication device, 11 is a pump, 13 is an auxiliary pipe, and 15 is a communication pipe.

Claims (1)

[Claims] 1. A bottom valve is provided in each chamber of the multi-chamber tank, and from each bottom valve, an independent pipe is provided with an on-off valve and can be connected to a hose at the tip, and an independent pipe is extended from the bottom valve. A central piping is provided, an auxiliary piping is branched from the central piping, and a proximal end of a communicating pipe whose tip can be connected to the tip of the independent piping is rotatably provided on the auxiliary piping, and a base end is rotatably provided on the auxiliary piping. A tank lorry is provided with an opening that can be opened and closed by rotation of a communication pipe, and a pump is provided on the central pipe for pumping and discharging the liquid in the tank with the communication pipe connected to an independent pipe. Discharge piping in.