JPH1129188A - Tank lorry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce residual liquid as much as possible on discharging the liquid, by collecting the liquid in respective tank chambers in the central part and discharging the liquid from the central part through the side face part and the rear part of the tank lorry. SOLUTION: The bottom face 2 of the inside of a tank 1 is formed to incline downward from both ends of the longitudinal direction of the tank to the central part and also from both side ends of the breadthwise direction of the tank to the central part. A plurality of tank chambers 4a, 4b, 4c are formed in the tank 1 and bottom valves 6a, 6b, 6c are provided at the lowermost positions of respective tank chambers and connected to a main discharge pipe 7 and a side discharge pipe 9 is connected to the main discharge pipe 7 and further, a valve is fitted to the discharge end side thereof. A discharge pipe 11 is installed to diverge to stretch from the side discharge pipe 9 to the rear part of the tank lorry and a pump 14 is equipped in the discharge pipe 11. And valves 12, 21 are fitted to the branched end side and the discharge end side of the discharge pipe 11 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank lorry for filling and transporting a liquid, which is a dangerous substance, into a tank.

[0002]

2. Description of the Related Art A tank lorry of this type, like a general tank lorry, has a straight cylindrical body inside a tank and is filled with and transports a liquid as a dangerous substance. Partitioned into a tank room,
Also, a bottom valve is provided on the bottom surface of each tank chamber for unloading the liquid in each tank chamber, and this is connected to a discharge pipe provided at the bottom of the tank.

[0003] The tank is slightly lower in the direction of travel,
That is, the whole tank is attached slightly downward
Therefore, the discharge pipe is also arranged forward and downward along the tank bottom, whereby the liquid in each tank chamber is once sent out to the front of the tank through the discharge pipe, and from the front position, the rear of the tank lorry or the left and right sides of the lorry. And the liquid is taken out from that position.

[0004] As described above, it is necessary to collect the liquid in the plurality of tank chambers once at the front position and to send the liquid to the rear or to the left or right from the front position. Therefore, the total extension length of the discharge pipe is very long. Was. In the tank of such a tank lorry, that is, in each tank chamber, various liquids including various oils are filled and loaded and transported.When the viscosity of the liquid to be filled increases, each tank chamber and A large amount of residual liquid is generated in the long discharge pipe.
Therefore, it has conventionally been considered that it is difficult to fill and transport a highly viscous liquid with a tank lorry at the same temperature. Even with low-viscosity liquids, if the total length of the discharge pipe is long as in the past, residual liquid will be generated in the tank chamber or the discharge pipe, and it will take considerable time to completely discharge the residual liquid. It took time.

[0005]

Therefore, it has been conventionally possible to reduce the viscosity of a high-viscosity liquid by raising the liquid temperature, thereby minimizing the generation of residual liquid at the time of unloading, and enabling loading and transportation by a tank lorry. It was done. However, if such a method is adopted and the temperature of the high-viscosity liquid is raised and raised to a high temperature for transportation, many of them will be deteriorated or deteriorated first, and ancillary equipment for maintaining the tank and discharge pipes of the tank truck at a high temperature. Required, as well as high-temperature resistant equipment on the loading and unloading side of the tank lorry,
It was very expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to solve the problems in the related art. The bottom of the tank is directed downward from both ends in the tank longitudinal direction and both sides in the width direction to the center. , The liquid in each tank chamber is collected at the central part, and the liquid is discharged from the side part and the rear part of the tank lorry from this central part, thereby minimizing the generation of residual liquid at the time of liquid discharge. The main purpose is to do so.

[0007]

According to the first aspect of the present invention, there is provided a tank lorry having an inner bottom surface of a tank filled with a liquid.
From the both ends in the tank longitudinal direction to the center and from the both sides in the tank width direction to the center to form a downward slope,
Inside the tank 1, a plurality of tank chambers 4a, 4b, 4 are formed by partition plates 3a, 3b provided at appropriate intervals in the longitudinal direction.
c, the bottom valves 6a, 6b, 6c are provided at the lowest positions of the bottoms of the tank chambers 4a, 4b, 4c, and the bottom valves 6a, 6b, 6c of the tank chambers 4a, 4b, 4c are connected to the tanks. At the center of the bottom, a discharge main pipe 7 extending in the longitudinal direction of the tank is connected and connected, a discharge pipe 9 extending to one side of the tank lorry is connected to the main pipe 7, and an opening / closing valve 10 is provided at the discharge end. The discharge pipe 11 extending from the side discharge pipe 9 to the rear of the tank lorry is branched, and the branch discharge pipe 1
1 and a branch pump 1
The on-off valves 12 and 21 are provided at the branch end side and the discharge end side of No. 1.

A second aspect of the tank lorry according to the first aspect is that the other side of the tank lorry is connected to the discharge pipe 11 branched from the side discharge pipe 9 extending to one side of the tank lorry from the lower side of the liquid feed pump 14. Is connected to another side discharge pipe 15 extending to the outside, and an open / close valve 17 is provided on the discharge end side thereof. A rear discharge pipe 19 extending from the other side discharge pipe 15 to the rear of the tank lorry is branched. On-off valves 20, 21 are provided at the branch end side and the discharge end side of the pipe.

According to a third aspect of the present invention, there is provided the tank lorry according to the first aspect, wherein the side surface of the tank lorry is connected to the discharge pipe 11 branching from the side discharge pipe 9 and the lower side of the liquid supply pump 14 to the tank lorry. A pair of extending side discharge pipes 15 and 16 are connected, and both side discharge pipes 15 and 16 are connected.
A rear discharge pipe 19 extending to the rear of the tank lorry from either one of the above is branched, and on-off valves 20 and 21 are provided on the branch end side and the discharge end side of the rear discharge pipe 19.

FIG. 1 is a longitudinal sectional view of a tank truck according to the present invention, FIG. 2 is a bottom view of the tank truck shown in FIG.
(A) is a plan view showing a tank of a tank lorry, and (B) is a cross-sectional view of the tank. The tank 1 is shown in FIG.
As shown in FIG. 2, the inner tank 1a and the outer tank 1b have a double structure, and both the inner and outer tanks 1a and 1b are formed in a flat cylindrical shape as shown in FIG. This tank 1 is attached to a chassis 24B of a traveling vehicle 24A, as shown in FIGS.

The inner bottom surface 2 of the tank 1 extends from both ends in the longitudinal direction of the tank to the center as shown in FIG.
As shown in (B), it is formed so as to be inclined downward from both sides in the tank width direction to the center, and the intersection between the two centers is the lowest. The inside of the tank 1 is partitioned into three tank chambers 4a, 4b, 4c by partitioning plates 3a, 3b provided at appropriate intervals in the longitudinal direction. The bottom valve 6 with the emergency shut-off valve 5b is located at the lowest position of the bottom surface 2 of the center tank chamber 4b (the intersection of the two center portions).
The bottom valves 6a, 5c with emergency shut-off valves 5a, 5c are located at the lowest positions on the bottom surface of the tank chambers close to the partition plates 3a, 3b even in the tank chambers 4a, 4c before and after the tank chambers 4a, 4c. 6c is provided. In addition, liquid filling ports 8a, 8b, 8c for filling the tank chambers 4a, 4b, 4c with liquid are provided in the upper part of the tank 1.

The bottom valves 6a, 6b, 6c with the emergency shut-off valves 5a, 5b, 5c are provided at the center of the bottom of the tank 1 and extend in the longitudinal direction of the tank as shown in FIGS. Each is connected to the main pipe 7 in communication. A discharge pipe 9 extending to one side of the tank lorry orthogonal to the main pipe 7 is connected to a central portion in the longitudinal direction of the discharge main pipe 7, and an open / close valve 10 is provided on a discharge end side of the discharge pipe 9. I have.
From this side discharge pipe 9, a discharge pipe 11 that extends relatively short to the rear side of the tank 1 in parallel with the main discharge pipe 7 is branched, and the branch discharge pipe 11 has an on-off valve 1 at its branch end.
On the lower side (rear side) of the on-off valve 12, a liquid feed pump 14 with a liquid feed direction switching valve 13 is provided. As can be seen from FIG. 1, the discharge main pipe 7 is formed so as to be inclined downward from both ends to the center, and has a lowest position substantially at the center, and the discharge pipe 9 is horizontally piped to the lowest position. I have.

The discharge pipe 11 branched from the side discharge pipe 9 extending to one side of the tank lorry is provided with a liquid feed pump 1.
3 are connected to a pair of side discharge pipes 15 and 16 extending from both lower sides of the tank lorry and extending to both side surfaces of the tank lorry.
A rear discharge pipe 19 extending toward the rear of the tank lorry is branched from one of the two side discharge pipes 15 and 16, and the rear discharge pipe 19 is connected to the branch discharge pipe 19. On-off valves 20, 21 are provided on the end side and the discharge end side, respectively.

As shown in FIG. 1, each of the bottom valves 6a, 6b, and 6c is provided with an operation shaft 23 having a well-known handle 22 that penetrates the tank 1 in a vertical direction. The bottom valves 6a, 6b, and 6c can be opened and closed by rotating the bottom valve 6a forward and backward with the handle 22. The bottom valves 6a, 6b, and 6c are provided with emergency shutoff valves 5a, 5b, and 5c, respectively.

The liquid feed pump 1 with the liquid feed direction switching valve 13
4 will be described. As shown in FIGS. 4 and 5, openings 25a and 35b communicating with the discharge pipe 11 are provided on both side surfaces, and the discharge port 14a of the liquid feed pump 14 is provided on the lower surface thereof.
Openings 25c, 2 communicating with the suction port 14b, respectively.
A valve body 26 having a substantially U-shaped vertical cross section is rotatably disposed in a casing 25 provided with 5d, and the suction port 14b is connected to the left and right discharge pipes 11, 11 or the discharge port 14a.
A flow passage 26a for selectively communicating with the valve body 26 is formed, and an operating rod 27 is integrally connected to the valve body 26.
Reference numeral 28 denotes a pressure regulating valve for allowing the high-pressure liquid on the discharge port 14a side to escape to the suction port 14b side.

When the liquid is discharged from the tank lorry having the above-described structure, the on-off valve 12 on the upper side of the liquid feed pump 14 in the discharge pipe 11 is closed, and any one of the tank chambers 4a, 4b, and 4c is closed. Bottom valve 6a,
6b and 6c are opened, and the open / close valve 10 on the discharge end side of the side discharge pipe 9 connected to the main discharge pipe 7 is opened to discharge the liquid in any of the tank chambers 4a, 4b and 4c. It can be naturally discharged from the main pipe 7 to one side of the tank truck through the side discharge pipe 9. Further, the amount of discharge can be adjusted by opening and closing the opening and closing valve 10.

When forced discharge is performed by the liquid feed pump 14, the on / off valve 10 of the side discharge pipe 9 is closed, and the on / off valve 12 of the discharge pipe 11 branched from the side discharge pipe 9 is opened. When the switching valve 13 is operated to operate the liquid supply pump 14 in the normal liquid supply direction in which liquid is supplied from the upper side to the lower side of the discharge pipe 11, the liquid in the tank chambers 4a, 4b, 4c is discharged. The branch discharge pipe 1 from the main pipe 7 via the side discharge pipe 9
It will flow to one side. Accordingly, when one of the side discharge pipes 15 and 16 connected to the discharge pipe 11 is to be discharged to the outside, the other side discharge pipe 1 is to be discharged.
By closing the on-off valve 18 on the 6th side, closing the on-off valve 20 on the upper side of the rear discharge pipe 19, and opening the on-off valve 17 on the one side discharge pipe 15 side, one of the tank chambers is opened. 4a, 4b, 4c, the main pipe 7 for discharge.
Can be forcibly discharged to one side of the tank lorry through the liquid supply pump 14 of the discharge pipe 11 and the one side discharge pipe 15. When the tank discharge is forcibly discharged to the other side of the tank lorry by the other side discharge pipe 9, the on-off valve 17 on the one side discharge pipe 15 is closed,
What is necessary is just to open the on-off valve 18 of the other side discharge pipe 9.

When the liquid feed pump 14 forcibly discharges the rear of the tank lorry from the rear discharge pipe 19 to the rear side of the tank lorry, the on-off valves 17 and 18 of the both side discharge pipes 15 and 16 are closed and the rear discharge pipe 19 is moved upward. On-off valve 2 on the side
Open the on-off valve 2 on the discharge end side of the rear discharge pipe 19.
1 to open one of the tank chambers 4a, 4
The liquids b and 4c can be forcibly discharged to the rear side of the tank lorry through the rear discharge pipe 19. When the remaining liquid in the discharge main pipe 7 and the side discharge pipe 9 is forcibly discharged by the liquid feed pump 14, the liquid transfer pump 14
May be switched by the switching valve 13 in the opposite direction to the normal direction.

The liquid in the tank chambers 4a, 4b, 4c is
When the liquid is discharged to the side of the tank lorry through the side discharge pipe 15 or 16 or discharged to the rear of the tank lorry through the rear discharge pipe 19, the liquid is supplied regardless of the forced discharge by the liquid feed pump 14 as described above. Liquid pump 1
It is also possible to stop 4 and discharge naturally.

As described above, the tank chambers 4a, 4b,
4c from the main discharge pipe 7 to the side discharge pipes 9, 15,
16 and the rear discharge pipe 19 can be naturally discharged or forcibly discharged to the side and rear of the tank lorry. The inner bottom surface 2 of the tank 1 extends from both ends in the tank longitudinal direction to the center and both sides in the tank width direction. From the center to the central part.
Bottom valves 6a, 6b, 6c are provided at the lowest positions of the divided tank chambers 4a, 4b, 4c, and these bottom valves 6a, 6b, 6c are connected to the main pipe 7 for discharge. Therefore, when all the liquid in the tank 1 is discharged,
The liquid in each of the tank chambers 4a, 4b, 4c can be completely dropped into the main discharge pipe 7, so that even if the liquid has a relatively high viscosity, residual liquid can be generated in each of the tank chambers 4a, 4b, 4c. Absent.

After emptying the inside of the tank 1 as described above,
When cleaning the drainage pipe below the tank 1, the bottom valves 6a, 6b, 6c of the tank chambers 4a, 4b, 4c are closed and provided in the discharge pipes 9, 11, 15, 16, 19. The on-off valves 10, 12, 17, 18, 20, 21 are opened, and the pressurized steam is supplied by pressurizing steam, for example, from the discharge end of the side discharge pipe 9 connected to the main discharge pipe 7. Is introduced from the side discharge pipe 9 to the main discharge pipe 7 and the discharge pipe 11, and the steam introduced into the discharge pipe 11 passes through the side discharge pipes 15 and 16 and further to the rear discharge pipe 1.
9 through the outlet end of each outlet pipe 15, 16, 19, so that the interior of these pipes can be thoroughly cleaned. The supply point of this steam may be any discharge end of the discharge pipes 9, 15, 16, 19. Also, instead of steam, water may be supplied under pressure. When washing with water, the liquid feed pump 14 may be operated.

In this tank lorry, the inner bottom surface 2 of the tank 1 is formed so as to be inclined downward from both ends in the tank longitudinal direction to the center and from both sides in the tank width direction to the center as described above. At the lowest position of each tank chamber 4a, 4b, 4c, the bottom valves 6a, 6b,
6c, these bottom valves 6a, 6b, 6c are connected in communication with a main discharge pipe 7, and a side discharge pipe 9 extending to one side of the tank lorry is connected to the main discharge pipe 7; A pair of side discharge pipes 15 and 16 extending from the lower side of the liquid feed pump 14 to both side surfaces of the tank lorry are connected to a discharge pipe 11 branched from the discharge pipe 9, and the both side discharge pipes 1 are connected.
Since the rear discharge pipe 19 extending from one of the side discharge pipes 15 and 16 to the rear of the tank lorry is branched, the discharge pipe can be concentrated at the center of the bottom of the tank 1 and the total discharge pipe The extension length can be shortened as much as possible,
Thereby, the residual liquid inside the discharge pipe can be suppressed as much as possible, and the residual liquid can be easily discharged.

In the illustrated embodiment described above, as shown in FIGS. 1 and 2, the discharge pipe 11 branched from the side discharge pipe 9 which is connected to the discharge main pipe 7 and extends to one side of the tank lorry. , A pair of side discharge pipes 1 extending from the lower side of the liquid feed pump 14 to both side surfaces of the tank lorry.
5 and 16 and a rear discharge pipe 19 extending from one of the two side discharge pipes 15 and 16 to the rear of the tank lorry.
Is adopted, but the present invention is not limited to this configuration.

That is, a discharge pipe (corresponding to the discharge pipe 11 in FIG. 2) extending from the side discharge pipe 9 connected to the main discharge pipe 7 and extending to one side of the tank lorry to the rear of the tank lorry.
And a feed pump 14 is provided in the branch discharge pipe, and an on-off valve (FIG. 2) is provided on the branch end side of the branch discharge pipe.
And an on-off valve (corresponding to the on-off valve 21 in FIG. 2) on the discharge end side. In this case, the pipe is extremely simple and the total length of the discharge pipe can be minimized, but the liquid is discharged at two points, one at the side and one at the rear of the tank lorry which are required at a minimum. It can be performed.

Further, another side discharge pipe (FIG. 2) extending from the lower side of the liquid feed pump 14 to the other side of the tank lorry is connected to the discharge pipe 11 branched from the side discharge pipe 9 extending to one side of the tank lorry. And a switching valve (corresponding to the switching valve 17 in FIG. 2) on the discharge end side.
The rear discharge pipe (corresponding to the rear discharge pipe 19 in FIG. 2) extending from the other side discharge pipe to the rear of the tank lorry is branched, and an on-off valve (FIG. 2) is provided on the branch end side of the rear discharge pipe.
, And an on-off valve (corresponding to the on-off valve 21 in FIG. 2) on the discharge end side. In this case, the piping is simple, the total extension length of the discharge pipe can be sufficiently reduced, and the liquid can be discharged at three places, two at the side of the tank lorry and one at the rear.

In the illustrated embodiment, the tank 1
Is partitioned into three tank chambers 4a, 4b, 4c by two partition plates 3a, 3b, but the number of partitioned tank chambers may be two or three or more.

[0027]

According to the tank lorry of the first aspect of the present invention, the inner bottom surface of the tank is formed to be inclined downward from both ends in the tank longitudinal direction to the center and from both sides in the tank width direction to the center. Since the bottom valve is provided at the lowest position of the bottom of each tank chamber partitioned into the tank chamber, and the bottom valve of each tank chamber is connected to the discharge main pipe extending in the tank longitudinal direction at the center of the tank bottom, When all the liquid in the tank is discharged, the liquid in each tank chamber can be completely dropped into the main discharge pipe, so that even if the liquid has a relatively high viscosity, no residual liquid is generated in each tank chamber. .

Further, a discharge pipe extending to one side of the tank lorry is connected to the main discharge pipe, and an opening / closing valve is provided on the discharge end side. The discharge pipe extending from the side discharge pipe to the rear of the tank lorry is branched. The branch discharge pipe is provided with a liquid feed pump, and the branch discharge pipe is provided with an opening / closing valve on the branch end side and the discharge end side. If the on-off valve on the upper side of the liquid pump is closed, one of the bottom valves of the tank chamber is opened, and the on-off valve of the side discharge pipe is opened. Without using a pipe, it is possible to naturally discharge from the main pipe for discharge to one side of the tank lorry through a side discharge pipe, and to close an open / close valve of the side discharge pipe, and to discharge the end of the branch discharge pipe. Open the side opening / closing valve to open the tank chamber The liquid can be naturally discharged to the rear side of the tank truck. When performing forced discharge by the liquid feed pump, the on / off valve of the side discharge pipe is closed, and the on / off valve of a branch branched from the side discharge pipe is opened. , The liquid in the tank chamber can be forcibly discharged to the rear side of the tank lorry. In particular, according to the present invention, since the drainage pipe is concentrated at the center of the tank bottom and the pipe is extremely simple, the total length of the drainage pipe can be minimized while the minimum length is required. The liquid can be discharged at two locations, one at the side and one at the rear of the tank lorry.

When cleaning the drainage pipe below the tank, the bottom valve of each tank chamber is closed, and the open / close valve provided on each of the discharge pipes is opened. By supplying steam or the like from the discharge end of the side discharge pipe, the inside of these drainage pipes can be almost completely cleaned, and the cleaning operation can be performed simply and easily.

In another aspect, a discharge pipe branched from a side discharge pipe connected to the main discharge pipe and extending to one side of the tank lorry extends from the lower side of the liquid feed pump to the other side of the tank lorry. A side discharge pipe is connected and an open / close valve is provided on the discharge end side, and a rear discharge pipe extending from the other side discharge pipe to the rear of the tank lorry is branched, and a branch end side of the rear discharge pipe is connected to the other side discharge pipe. When an on-off valve is provided on the discharge end side, the liquid can be discharged at three locations, two at the side of the tank lorry and one at the rear, which improves workability.

Further, the discharge pipe branched from a side discharge pipe connected to the main discharge pipe and extending to one side of the tank lorry extends from the lower side of the liquid feed pump to both side faces of the tank lorry. A pair of side discharge pipes are connected, and a rear discharge pipe extending from one of the two side discharge pipes to the rear of the tank lorry is branched.Open/close valves are provided at a branch end side and a discharge end side of the rear discharge pipe. In the case where the tank lorry is provided, the liquid can be discharged from the tank lorry at three places at the side and one place at the rear, and the two sides of the tank lorry can be discharged.
The liquid can be forcibly discharged by the liquid feed pump at the location, and the workability is further improved. In this case, a side discharge pipe connected to the main discharge pipe and extending to one side surface of the tank lorry can be used as a cleaning port.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a tank lorry according to the present invention.

FIG. 2 is a bottom view of the tank lorry shown in FIG.

FIG. 3A is a plan view showing a tank of a tank truck, and FIG. 3B is a transverse sectional view of the tank.

FIG. 4 is a longitudinal sectional view of a main part of a liquid feed pump with a switching valve.

FIG. 5 is a sectional view taken along line YY of FIG. 4;

[Description of Signs] 1 Tank 2 Internal bottom surface of tank 3a, 3b Partition plate 4a, 4a, 4c Tank chamber 6a, 6b, 6c Bottom valve 7 Main pipe for discharge 9, 15, 16 Side discharge pipe 11 Discharge pipe 19 Rear discharge Pipe 10, 12, 17 On-off valve 18, 20, 21 On-off valve 13 Switching valve 14 Liquid feed pump

Claims (3)

[Claims] 1. An inner bottom surface of a tank to be filled with a liquid is formed so as to be inclined downward from both ends in the longitudinal direction of the tank to the center and from both sides in the width direction of the tank to the center. A plurality of tank chambers are formed by the partition plate provided at the bottom, and a bottom valve is provided at the lowest position of the bottom of each tank chamber, and the bottom valve of each tank chamber extends in the tank longitudinal direction on the center side of the tank bottom. A discharge pipe extending to one side of the tank lorry is connected to the main discharge pipe, and an open / close valve is provided at the discharge end of the main pipe.A discharge pipe extending from the side discharge pipe to the rear of the tank lorry is branched. A tank lorry in which a liquid feed pump is provided in the branch discharge pipe, and on-off valves are provided on the branch end side and the discharge end side of the branch discharge pipe. 2. A discharge pipe branched from a side discharge pipe extending from one side of the tank lorry to another discharge pipe extending from the lower side of the liquid feed pump to the other side of the tank lorry. An opening / closing valve is provided on the side of the tank, a rear discharge pipe extending from the other side discharge pipe to the rear of the tank lorry is branched, and an opening / closing valve is provided on a branch end side and a discharge end side of the rear discharge pipe. The tank lorry according to claim 1. 3. A pair of side discharge pipes extending from a lower side of the liquid feed pump to both side surfaces of the tank lorry are connected to a discharge pipe branched from a side discharge pipe extending to one side of the tank lorry. The tank lorry according to claim 1, wherein a rear discharge pipe extending from any one of the above to a rear part of the tank lorry is branched, and an opening / closing valve is provided at a branch end side and a discharge end side of the rear discharge pipe.