JPH0315514Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a discharge piping device for a tank lorry.

``Prior art'' and ``Problems to be solved by the invention'' In general, in the discharge piping system for tank trucks, the discharge piping system is designed to allow unloading from either the left or right side depending on the situation at the unloading location. A discharge piping device is provided so that the valves are located on both left and right sides. However, in conventional discharge piping devices, the main piping is connected to the bottom valve of the tank chamber, and the auxiliary piping, which is connected at its center via a connecting piping and has discharge valves at both ends, extends in the width direction of the tank. Because the structure was such that it was fixed horizontally along the line, a small amount of unloading liquid remained at the bottom of the auxiliary pipe even after unloading was completed. In particular, if the ground surface at the unloading location is sloped and the auxiliary piping is inclined downward in the opposite direction to the discharge direction, there is a drawback that the residual amount becomes extremely large.

Therefore, in order to eliminate the above-mentioned drawbacks, for example, as shown in FIG.
The central part of the linear auxiliary pipe C is connected to the auxiliary pipe C through a rotating joint (not shown), and the auxiliary pipe C is provided so as to be swingable in the vertical direction using the connecting part as a fulcrum, or as shown in Fig. 4. As shown, a discharge piping section G is connected to both ends of a horizontal piping section E of an auxiliary piping C connected to the main piping B via a connecting piping D via a universal joint F so as to be swingable in the vertical direction. etc. were proposed. In other words, depending on the location, auxiliary piping C
Conventionally, a discharge piping device has been proposed in which all or a part of the auxiliary piping C is inclined to solve the problem of liquid remaining in the auxiliary piping C, but all of the discharge piping devices have complicated structures. It is expensive, and work efficiency is poor because it is troublesome to operate the auxiliary pipe C during unloading, and furthermore, it is necessary to provide a holding device to firmly fix the movable part of the auxiliary pipe C to the vehicle body, etc. when driving. It had some drawbacks, such as:

"Means for Solving the Problems" In view of the above-mentioned circumstances, the present invention was devised to solve the above-mentioned conventional problems. , a tank lorry consisting of an auxiliary pipe provided with discharge valves at both ends and arranged along the width direction of the tank, and a connecting member having one end connected to the center of the auxiliary pipe and the other end connected to the main pipe. In the discharge piping device, the auxiliary piping has approximately the same diameter as a whole, and the inclined piping portions each having a discharge valve at the tip are arranged at both ends of the horizontal piping portion, and the inclined piping portions are positioned so as to be inclined in a substantially symmetrical manner. The pipes are connected in series so as to be connected to each other, and switching valves are provided at both ends of the horizontal piping section.

The horizontal piping section is formed to have a short enough length to have enough room to install the switching valve at both ends,
Further, the switching valve is such that the one on the discharge side is opened and the one on the opposite side is closed during unloading. The auxiliary piping is provided in such a position that both inclined piping portions are positioned in a downwardly inclined manner, with the center portion of the horizontal piping portion connected to the connecting piping.

"Operation" Since the present invention consists of the above-mentioned means, it functions as follows. In other words, when unloading from either the left or right discharge valve, the discharged liquid is It flows down the inclined piping section on the discharge side and is unloaded. Therefore, at this time, since the switching valve on the opposite side is closed, the discharged liquid will not flow into the inclined piping section on the opposite side, and the horizontal piping between the closed switching valve and the opened switching valve will not flow. The section consists of a predetermined short length, and since the horizontal piping section occupies only a small part of the auxiliary piping, liquid hardly remains in the auxiliary piping.

In particular, even if the ground surface of the unloading area is slightly sloped and the tank truck is sloped downward in the width direction opposite to the discharge direction, the sloped piping part on the discharge side of the auxiliary piping Since it is sloped downward and its tip is not raised, there is little chance of liquid remaining in the auxiliary pipe. In addition, since the auxiliary piping is an integral structure with no moving parts, there is no need to operate the auxiliary piping when unloading, and a special holding device is provided to secure the movable parts of the auxiliary piping while driving. There's no need.

"Embodiment" The present invention will be described below based on an embodiment shown in the drawings.

In Figs. 1 and 2, 1 is a tank lorry, 2 is a tank mounted on the vehicle body 3 of the tank lorry 1 via a subframe 4, and this tank 2 is divided into a plurality of parts by partition plates 5, 5... It is divided into tank chambers 6, 6..., and a bottom valve 7, 7... is provided at the bottom of each tank chamber 6, 6..., respectively. Reference numeral 8 denotes a main pipe, and the main pipe 8 is disposed at the bottom of the tank 2 so as to be inclined downwardly toward the front along the longitudinal direction of the tank 2, and is connected to each bottom valve 7, 7... It is connected to the.

9 is a connecting pipe 1 which is a connecting member to the front end of the main pipe 8.
This auxiliary piping 9 is connected through 0, and this auxiliary piping 9 has approximately the same diameter as a whole as shown in the figure.
It is structured as follows. In other words, the horizontal piping section 12 is formed to have a short and slight length as shown in the figure, so that there is enough room to install the later-described switching valves 11 at both ends when the central portion is connected to the connection piping 10. Inclined piping portions 13, 13 are connected to each other at both ends thereof so as to be symmetrically inclined and positioned. 11 is a switching valve;
As will be described later, the switching valve 11 is such that the one on the discharge side is opened and the one on the opposite side is closed when unloading.
3 and 13, respectively. Note that 14 is a discharge valve disposed at the tip of the inclined piping section 13, and 15 is a discharge port. The auxiliary piping 9 constructed as described above is located along the width direction of the tank 2, and its horizontal piping portion 12 maintains a positional relationship parallel to the vehicle body 3, and both inclined piping portions 13, 13 are positioned along the vertical direction. The central portion of the horizontal piping section 12 is connected to one end of the connecting piping 10 so as to be inclined downwardly.

The above is the explanation of the configuration, etc.

The operation etc. will be explained below.

The tank lorry discharge piping device according to the present invention includes:
With the above configuration, when unloading the liquid loaded in the tank chamber 6, a discharge hose (not shown) is first connected to the discharge port 15 on the discharge side of the auxiliary piping 9. Next, after opening the switching valve 11 on the discharge side and closing the switching valve 11 on the opposite side, if the bottom valve 7 and the discharge valve 14 are opened, the liquid loaded in the tank chamber 6 will be transferred to the bottom valve 7. , flows down to the auxiliary pipe 9 via the main pipe 8 and the connecting pipe 10. The liquid that has flowed down into the auxiliary pipe 9 is guided to and discharged from the inclined pipe section 13 on the discharge side, which is provided in a downwardly inclined manner.

Therefore, during unloading, since the switching valve 11 on the opposite side is closed in this way, liquid will not flow into the inclined piping section 13 on the opposite side, and the switching valve 11 will be closed and the switching valve 11 will be opened. Since the horizontal piping section 12 between the switching valves 11 has an extremely short length, the liquid is completely discharged and hardly remains in the auxiliary piping 9. In particular, even when the ground surface of the unloading place is slightly sloped and the tank truck 1 is sloped downward in the width direction opposite to the discharge direction, the sloped piping part on the discharge side of the auxiliary piping 9 Since the pipe 13 is sloped downward and its tip is not in a raised state, almost no liquid remains in the auxiliary pipe 9.

"Effects of the Invention" As detailed above, according to the tank lorry discharge piping device according to the present invention, the auxiliary piping includes inclined piping sections connected to both ends of a short horizontal piping section, and Switching valves are installed at both ends of the horizontal piping section, and the center section of the horizontal piping section is connected to the connecting piping, which is the connecting member, so liquid will not remain in the auxiliary piping during unloading. There aren't many. In addition, since this auxiliary piping is a one-piece structure with no moving parts, there is no need to provide a special holding device to fix the movable parts of the auxiliary piping while driving, etc. It is simple and allows for cost reduction, and it also makes it possible to improve work efficiency by eliminating the need to operate auxiliary piping during unloading, and has significant effects.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention. FIG. 1 is a plan view of a tank truck equipped with the discharge piping device of the present invention, and FIG.
The enlarged line sectional view, FIGS. 3 and 4 are front views of conventional auxiliary piping, respectively. In the figure, 1 is a tank truck, 2 is a tank, 3 is a vehicle body, 4 is a subframe, 5 is a partition plate, 6 is a tank chamber, 7 is a bottom valve, 8 is a main pipe, 9 is an auxiliary pipe, 10
is the connection pipe, 11 is the switching valve, 12 is the horizontal pipe section,
13 is an inclined piping section, 14 is a discharge valve, and 15 is a discharge port.

Claims (1)

[Scope of claim for utility model registration] Main piping connected to the bottom valve of the tank chamber, auxiliary piping provided with discharge valves at both ends and arranged along the tank width direction, and the center of the auxiliary piping. In the discharge piping device for a tank lorry, the auxiliary piping has approximately the same diameter as a whole, and there are discharge valves at both ends of the horizontal piping. The horizontal piping section is constructed by arranging inclined piping sections having the tip at the tip so that the inclined piping sections are positioned at an approximately symmetrical inclination, and arranging switching valves at both ends of the horizontal piping section. , the horizontal piping section is formed to have a short enough length to have enough room to install the switching valve at both ends,
In addition, the switching valve is such that the one on the discharge side is opened and the one on the opposite side is closed when unloading, and the auxiliary piping is arranged in a positional relationship such that both inclined piping parts are inclined downward. A discharge piping device for a tank lorry, characterized in that a central portion of a horizontal piping section is connected to the connection piping.