JP2562513Y2 - Bottom loading type tank truck - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom loading type tank lorry. That is, the present invention relates to a bottom loading type tank lorry capable of loading and unloading via a pipe on the bottom valve side of the tank.

[0002]

2. Description of the Related Art As is well known, a bottom-loading type tank lorry generates less volatile gas and has much higher safety and workability than a top-loading type tank lorry which loads from an injection hatch at the top of the tank. Is excellent. By the way, as such a bottom-loading type tank lorry, a two-sided piping type shown in the rear view of FIG. 8 and a one-sided piping type shown in the rear view of FIG. 9 can be considered. In the double-sided piping system shown in FIG. 8, the pipe 3 having one end connected to the tank 1 via the bottom valve 2 is provided with the other end of the branched pipe 4 having the injection and discharge ports located on the left and right sides below the tank 1. 5, so that loading and unloading from both sides of the tank 1 can be appropriately performed. On the other hand, in the one-sided pipe system shown in FIG. 9, one end of the pipe 6 connected to the tank 1 via the bottom valve 2 is connected to the inlet / outlet port 5 located only on one side below the tank 1. The loading and unloading are performed from only one side of the tank 1. In the double-sided pipe system shown in FIG. 8, the left and right branch pipes 4 are formed in a straight line and provided horizontally. 8 and 9
The middle 7 is a protection frame for the pipes 3 and 6.

[0003]

The following problems have been pointed out in such a conventional bottom loading type tank lorry. That is, the volume at the time of measurement in this tank lorry includes not only the tank 1 but also the pipes 3 or 6, so that the amount of liquid to be loaded and unloaded is equal to the pipe 3 or Measured including those in 6. Therefore, at the time of unloading, it is indispensable to have a structure in which residual liquid causing a measurement error is not generated as much as possible. Therefore, when unloading in an inclined state on a slope, a considerably large amount of residual liquid is present in the branch pipe 4. The use of the double-sided piping system shown in FIG. In other words, as the bottom loading type tank lorry, only the one-sided pipe type shown in FIG. 9 has been approved for use because there is little risk of residual liquid being generated in the pipe 6 when unloading in an inclined state.

That is, the two-sided piping system shown in FIG.
Since the left and right branch pipes 4 form a straight line, for example, when unloading from the left inlet / outlet port 5 via the upper, left branch pipe 4 in the drawing, in the inclined state of the right in the drawing,
Injection orifice 5 on the lower side, closed on the right side in the drawing
Conventionally, its use has not been recognized as a large amount of residual liquid remaining without unloading is generated mainly in the branch pipe 4 on the right side of the branch pipe, which causes a large measurement error. However, this two-sided piping type bottom loading tank lorry is compared to the one-sided piping type,
Since loading and unloading can be performed from both sides of the tank 1 or either of them as appropriate, in consideration of the status of loading equipment and unloading equipment such as gas stations, it is convenient, easy to use, excellent in workability, and demand for its use Was also expensive.

Here, the above-mentioned residual liquid will be described in more detail. First, the measuring instrument verification inspection rule stipulates that it is essential that no more than 1/3 of the residual liquid corresponding to the verification tolerance corresponding to the minimum amount remains. In the tank lorry, the capacity of one tank in the tank chamber, that is, the minimum amount is usually 2000 L, and 1/3 of the test tolerance of 0.5% is 3.33 L, so that no residual liquid of 3.33 L or more is discharged. It is necessary. By the way, at a gas station where tank lorries are unloaded, the ground is usually inclined about 3 degrees for drainage. Therefore, FIG.
When the tank lorry of the double-sided piping method is unloaded from the branch pipe 4, the injection discharge port 5 on the upper side of the slope in the inclined state in such a gas station or the like,
Since the left and right branch pipes 4 are linear, a large amount of residual liquid has been generated as follows. That is, the residual liquid is
Although the upper surface forms a horizontal surface in the inside, a considerably large amount of residual liquid exceeding half of the volume is generated in the branch pipe 4 to the closed inlet / outlet port 5 on the lower side. Some of the residual liquid is generated in the branch pipe 4 of less than half of its volume (see the broken line in FIG. 5 (3) and FIGS. 6 (1) and 6 (2)). ). This residual liquid reaches up to 4.84 L, which greatly exceeds the residual liquid of 3.33 L based on the above-mentioned measuring instrument inspection and inspection rules. Had not been. This data shows that the inclination of the ground is 3 degrees and the capacity of one tank in the tank room of the tank truck is 2 degrees.
000L, total length of left and right branch pipes 4 is 1540
mm, with an inner diameter of 102 mm.

Conventionally, a bellows is interposed between the vehicle body side and the left and right leaf springs in the tank trolley of the double-sided piping type shown in FIG. 8 to supply air to the lower bellows when unloading in an inclined state. As a result, technology that allows the vehicle body to be lifted has also been developed. Since the unloading is performed after the vehicle body is tilted horizontally or reversely, no residual liquid is generated in the branch pipe 4. However, the structure of the bellows, the air supply means, the control means, and the like is complicated, and the cost is low. There was a drawback that it would be high.

The present invention has been made in view of the above circumstances, and has been made in order to solve the above-mentioned problems of the prior art. In the present invention, the branch pipes leading to the left and right injection / discharge ports are replaced with an inclined cylindrical upper main pipe. Firstly, when unloading from the upper side in an inclined state, only a small amount of residual liquid is generated while the lower portion is formed in a narrow groove shape with a slight gap. Second, this is easily and easily realized, and third,
Moreover, it is an object of the present invention to propose a bottom loading type tank lorry having a double-sided piping system.

[0008]

The technical means of the present invention for achieving this object is as follows. That is, this bottom-loading tank lorry is a tank lorry that can be loaded from the bottom valve side of the tank in a bottom-loading manner, and one end is connected to the tank via the bottom valve, and the other end is branched. Is provided with piping connected to the injection and discharge ports located on the left and right sides under the tank. The left and right branch pipes have a cylindrical upper main pipe inclined downwardly on both left and right sides, an upper end is opened in the upper main pipe, and a lower end is closed horizontally. , And a lower extension formed in a narrow groove shape.

[0009]

The present invention is constituted by such means, and operates as follows. That is, since this tank lorry is of the bottom loading type, loading and unloading are performed from the bottom valve side of the tank, and since it is of a double-sided piping method,
Loading and unloading are performed from either side of the tank or either. The branch pipe of the tank lorry is composed of a slanted cylindrical upper main pipe and a narrow groove-shaped lower extension with a slight gap. Therefore, first, when unloading from the upper branch pipe and the injection discharge port in an inclined state, only a small amount of residual liquid is generated in the large main pipe portion in the branch pipe, and the volume is extremely small. Occurs around the lower extension. Therefore, in this tank truck, only a small amount of residual liquid is generated in the branch pipe. Secondly, this is easily realized by a branch pipe having a simple structure. Third, since the tank lorry has a double-sided piping system, loading and unloading can be performed from both sides or one side as appropriate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. 1, 2 and 3 show an embodiment of the present invention. FIG.
FIG. 2B is an enlarged central vertical cross-sectional view thereof, FIG. 2A is a rear explanatory view of another main part, FIG. 2B is an enlarged central vertical cross-sectional view thereof, and FIG. It is explanatory drawing of a bottom piping structure. FIG. 4 is an explanatory side view of the tank truck.

First, as shown in FIG. 4, the tank truck is
The inside of the tank 1 is partitioned into, for example, six tank chambers 8 by a partition wall extending in the width direction. Then, gasoline, light oil, kerosene, lubricating oil, heavy oil, and various other liquids that are dangerous substances are loaded from the loading equipment tanks into the tank chambers 8 of the tank lorry, transported, and unloaded at the destination gas station or the like. And then unloaded to the equipment tank. As the tank lorry, there is a trailer type in addition to the so-called motorcycle type shown in the figure. By the way, this tank lorry can be loaded from the bottom valve 2 side of each tank chamber 8 of the tank 1 in a bottom loading manner, and can be loaded and unloaded from both sides of the tank 1 by a double-sided piping system. ing. That is, a pipe 9 is provided below each tank chamber 8 of the tank 1, and one end of the pipe 9
Each of the tank chambers 8 is connected via the bottom valve 2, and the other end branched to both sides is connected to the injection and discharge ports 5 located on the left and right sides below the tank 1. The injection / discharge port 5 is also used as an injection port and also as a discharge port, and is provided in a concentrated manner at one location on both the left and right sides under the tank 1. Various liquids, which are dangerous substances, are pressure-fed from the loading equipment side to the respective tank chambers 8 via the respective injection and discharge ports 5, the pipe 9, the bottom valve 2, and the like, and are unloaded by gravity.

The piping 9 will be described in detail.
Each has a connection pipe 10 at one end connected to the tank chamber 8 and the bottom valve 2, and a branch pipe 11 at the other end connected to the injection / discharge port 5. First, the connection pipe 10
As shown in FIG. 3, there are many that have an appropriate length and are arranged along the longitudinal direction below the tank 1, but those that are arranged in the short direction, that is, in the left-right direction, are inclined in both directions. Some are arranged. Next, the branch pipe 11 is disposed in the short direction, that is, the left and right direction below the tank 1, and is branched from the connection point to the connection pipe 10 toward the left and right injection and discharge ports 5.
The left and right pair of branch pipes 11 are respectively cylindrical upper main pipe parts 12 inclined downward to the left and right sides.
And a lower extension portion 13 having an upper end opened in the upper main pipe portion 12 and a lower end closed horizontally, and formed in a narrow groove shape with a slight gap. As the upper main pipe section 12, for example, a normal pipe having an inner diameter of 102 mm is used,
Has an inclination angle B of 3 degrees, is connected to the connection pipe 10 at the upper end of the inclination, and has the injection outlet 5 at the lower end of the inclination.
It is connected to the. The lower extension 13 has an upper end entirely opened or an upper end provided with a large number of communication holes with respect to the upper main pipe 12, and has a vertical length of about 6 mm. Are formed in the shape of a narrow groove / slit, the whole of which forms a triangle, and the right and left ends of which are formed by injection and discharge ports 5.
It is connected to a nearby upper main section 12.

As described above, each pipe 9 is
A connection pipe 10 and left and right branch pipes 11 are provided.
1 comprises an upper main pipe part 12 and a lower extension part 13. Of course, the left and right branch pipes 11, that is, the left and right upper main pipe portions 12, and the left and right lower extension portions 13 are connected to each other. The branch pipe 11 shown in FIG. 1 is branched right and left at the center position in the left-right direction, and the left and right branch pipes 11 have the same length, whereas the branch pipe 11 shown in FIG. Is branched to the left and right at a position closer to one side (that is, the left side in the drawing from the center position), and the left and right branch pipes 11 are longer than the other (the right one in the drawing is far more than the left one). Long). In the piping structure shown in FIG. 3, two sets of branch pipes 11 are branched at the center as shown in FIG. 1, and four sets of branch pipes 11 are branched toward one side as shown in FIG. Of course, an example is also possible in which branching is performed at a position closer to the opposite side in the left-right direction from that of FIG. 2 (that is, a position closer to the right side in the drawing than the center position). The difference in the branch position of the branch pipe 11 is that the tank 1
Below, a number of piping structures, operating means for the bottom valve 2, and others are complicated and complicated, so that they are prevented from overlapping in the vertical direction as much as possible. Reference numeral 7 in the drawing denotes a protection frame for the pipe 9 including the branch pipe 11.

The present invention is configured as described above. Then, it becomes as follows. First, since this tank lorry is of a bottom loading type, loading and unloading to and from each tank chamber 8 is performed from a pipe 9 on the bottom valve 2 side of the tank 1. Further, since this tank lorry is of a double-sided pipe type, Loading and unloading are performed as appropriate from the left and right sides of one or one of the injection and discharge ports 5. By the way, here, the branch pipe 11 of the pipe 9 of the tank truck is
Since each of them is composed of a slanted cylindrical upper main pipe part 12 and a narrow groove-shaped lower extension part 13 with a slight gap, when unloading in a sloped place such as a gas station, the upper rank of the slope is higher. When unloading from the side branch pipe 11 and the injection / discharge port 5, the operation is as follows.

FIG. 5 is a comparison diagram between the conventional example shown in FIG. 8 and the embodiment of the present invention shown in FIG.
(1) Figure is an explanatory view of a horizontal state of a branch pipe 4 of a conventional example,
FIG. 2B is an explanatory view of the horizontal state of the branch pipe 11 of this embodiment, and FIG. 3C is an explanatory view in which the residual liquid F at the time of unloading in an inclined state is displayed in an overlapping manner. (3)
In the figure, the broken line shows the branch pipe 4 of the conventional example, and the solid line shows the branch pipe 11 of the present invention). FIG. 6 is a comparison diagram between the conventional example shown in FIG. 8 and the embodiment shown in FIG. 1, and FIG. 6A is a view showing the unloading of the conventional branch pipe 4 in an inclined state. Explanatory drawing of the residual liquid F at the time, (2) is a sectional view of each part thereof,
FIG. 3 (3) is an explanatory view of the residual liquid F when unloading the branch pipe 11 of this embodiment in an inclined state, and FIG. 4 (4) is a sectional view of each part thereof. In the embodiment of the present invention in FIG. 1, for example, when unloading is performed from the injection port 5 on the left side through the branch pipe 11 on the upper side, and on the left side in the drawing, in the inclined state of the right side in the drawing. Are as shown in FIG. 5 (3) and FIGS. 6 (3) and (4).
That is, the residual liquid F is generated by the upper surface forming the horizontal plane A in the branch pipe 11, but first, in the lower branch pipe 11 to the closed injection port 5 on the right side in the drawing,
A small amount of residual liquid F that is less than half of the volume is generated in the upper main pipe part 12, and a full residual liquid F is generated in the lower extension part 13, respectively. In 11, no residual liquid F is generated in the upper main pipe part 12,
A full residual liquid F was generated in the lower extension 13.

Therefore, this tank truck has the following first, second and third conditions. First, in the case of the embodiment shown in FIG. 1, when unloading in an inclined state, the residual liquid F has a large volume in the branch pipe 11 and an inner diameter of 1.
The upper main pipe part 12 of about 02 mm is slightly generated,
Very small volume in the branch pipe 11 with a gap of 6 mm
This occurs around the lower extension 13 of the degree.
On the other hand, in the branch pipe 4 of the conventional example shown in FIGS. 8 and 5A, that is, the branch pipe 4 consisting only of a cylindrical main pipe part having a straight left and right straight line and a large volume, FIG. 5
As shown in FIG. 3 (3) and FIGS. 6 (1) and 6 (2), a large amount of residual liquid F exceeding half of the volume is generated on the lower right side, and further on the upper left side. A small amount of residual liquid F was also generated in the sample, and as described above, the total measured value was 4.8.
4 L of residual liquid F had been produced.

In the branch pipe 11 according to the present invention, the upper main pipe section 12 is formed to be inclined and the lower extension section 13 is provided, so that the residual liquid F remaining in the pipe 9 without being unloaded is far. Decrease. The embodiment of FIG. 1, that is, FIG. 5 (2), FIG. 3 (3) and FIG. 6 (3)
8 and FIG. 4D, the residual liquid F was measured under the same conditions as in the conventional example of FIG.
It became 7L. (Note that the inclination of the ground is 3 degrees, tank room 8
Is 2000 L, the inner diameter of the upper main pipe section 12 of the branch pipe 11 is 102 mm, and the gap of the lower extension section 13 is 6 mm. 3) Thus, 3.33 L of the residual liquid based on the above-mentioned meter inspection inspection rules could be sufficiently satisfied. Thus, in this tank lorry of the double-sided piping system, first,
Only a small amount of the residual liquid F is generated in the branch pipe 11.

Second, this is easily realized with a simple configuration by forming the branch pipe 11 from a predetermined upper main pipe section 12 and a lower extension section 13. That is,
Unlike the conventional example of this kind, the bellows, the air supply means, the control means, and the like are not required, and this is realized simply by changing the shape and the like of the branch pipe 11. Thirdly, since the bottom-loading type tank lorry is formed by a double-sided piping system, the tank loading can be appropriately performed from both sides of the tank 1 or any of the injection and discharge ports 5 thereof.
Loading and unloading can be performed, which is much more convenient than the one-sided piping system shown in FIG.

FIG. 7 shows the branch pipe 11 of the embodiment shown in FIG. 2. (1) FIG.
(2) Drawing is an explanatory view of residual liquid F at the time of unloading in an inclined state. That is, for example, when the vehicle is unloaded from the injection and discharge port 5 on the left side through the branch pipe 11 on the upper side, and on the left side in the drawing, in the inclined state of the right side in the drawing, as shown in FIG. First, in the lower branch line 11 to the closed inlet / outlet port 5 on the right side in the drawing, a small amount of residual liquid F flows into the upper main pipe portion 12 and the lower extension portion 13 thereof.
In the upper left branch pipe 11, almost no residual liquid F is generated in the upper main pipe part 12, and some residual liquid F is generated in the lower extension part 13. Liquid F was generated. And in such an embodiment of FIG.
As a result of actual measurement under the same conditions as in the example of FIG. 1 and the conventional example of FIG. 8, the residual liquid F was 2.43 L.

First, a branch pipe 11 (not shown) branched at a position shifted to the opposite side in the left-right direction from that of FIG. 2 (that is, a position shifted to the right side in the drawing from the center position). In the same manner, the residual liquid F
Was found to be 0.81 L. Second,
When unloading is performed on a horizontal ground by a tank lorry having the branch pipe 11 as in the present invention, the branch pipe 11 is used.
Since the lower end of the lower extending portion 13 is horizontal, no residual liquid F is generated in the branch pipe 11.

[0021]

As described above, the bottom-loading type tank lorry according to the present invention is configured such that the branch pipes leading to the left and right injection / discharge ports are connected to the cylindrical upper main pipe section inclined downward and the narrow gap with a small gap. The following effects are exhibited by the configuration including the groove-shaped lower extension.

First, this bottom-loading tank lorry is of a double-sided piping type. However, when unloading from the upper side in an inclined state, only a small amount of residual liquid is generated in the branch piping. Therefore, the volume at the time of measurement includes not only the tank but also the piping.However, when unloading at a gas station or the like where the ground is inclined, the generation of residual liquid is small and the measurement error is within the allowable range. Satisfactorily satisfies the provisions of the measuring instrument verification inspection rules.

Second, it can be easily realized with a simple configuration, and is excellent in cost. Thirdly, since the bottom-loading type tank lorry can be loaded and unloaded from both sides or one of the tanks, which is a feature of the double-sided piping method, loading and unloading equipment such as gas stations can be used. Considering the situation, it is convenient, easy to use and excellent in workability. As described above, the effects exhibited by the present invention are remarkably large, for example, the problems existing in this kind of conventional example are eliminated.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a bottom-loading type tank truck according to the present invention, wherein FIG.
(2) The figure is an enlarged central longitudinal sectional view.

FIGS. 2A and 2B show the same embodiment, wherein FIG. 1A is an explanatory rear view of another main part, and FIG. 2B is an enlarged central longitudinal sectional view thereof.

FIG. 3 is an explanatory diagram of a bottom piping structure of the embodiment.

FIG. 4 is an explanatory side view of the tank lorry.

FIG. 5 is a comparison diagram of the conventional example shown in FIG. 8 and the embodiment shown in FIG. 1 described later. FIG. 5A is an explanatory view of a horizontal state of a branch pipe of the conventional example, and FIG. Is an explanatory view of the horizontal state of the branch pipe of the embodiment, and FIG. 3 (3) is an explanatory view of the residual liquid at the time of unloading in the inclined state in both cases.

6 is a comparison diagram between the conventional example shown in FIG. 8 and the embodiment shown in FIG. 1; FIG. 6 (1) shows a conventional example of unloading a branch pipe in an inclined state; Illustration of residual liquid,
(2) is a cross-sectional view of each part thereof, (3) is an explanatory view of residual liquid when unloading the branch pipe of the embodiment in an inclined state, and (4) is a cross-sectional view of each part thereof. It is.

FIG. 7 shows a branch pipe of the embodiment shown in FIG. 2, and (1)
The figure is an explanatory view of a horizontal state, and the figure (2) is an explanatory view of residual liquid at the time of unloading in an inclined state.

FIG. 8 is an explanatory rear view of a bottom loading type tank lorry of a double-sided piping type according to a conventional example.

FIG. 9 is an explanatory rear view of a conventional one-sided piping type bottom loading type tank truck.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Bottom valve 3 Piping (conventional example) 4 Branch pipe (conventional example) 5 Injection / discharge port 6 Piping (conventional example) 7 Protective frame 8 Tank room 9 Piping (of the present invention) 10 Connection Pipe 11 Branch pipe (of the present invention) 12 Upper main pipe 13 Lower extension A Horizontal plane B Incline angle F Residual liquid

Claims (1)

(57) [Scope of request for utility model registration] 1. A tank lorry which can be loaded from the bottom valve side of a tank in a bottom loading manner, one end of which is connected to the tank via the bottom valve, and the other end of which is branched below the tank. Pipes connected to the injection and discharge ports located on both the left and right sides, and the branch pipes to the left and right of the pipe are respectively a cylindrical upper main pipe section inclined downward to the left and right sides, and the upper main pipe section A bottom-loading tank lorry, characterized in that the bottom-loading tank lorry has an upper end opened and a lower end closed horizontally, and a lower extension formed in a narrow groove shape with a small gap.