JP3924547B2 - Tank truck - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tank lorry for filling a tank with a liquid that is a dangerous substance and transporting the tank.
[0002]
[Prior art]
This type of conventional tank lorry, like a general tank lorry, is composed of a straight cylindrical body and is filled and transported with dangerous liquid, so the interior is partitioned into multiple tank chambers by partition plates. In addition, 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 disposed at the bottom of the tank.
[0003]
The tank is slightly lower in the direction of travel, that is, the entire tank is attached slightly forward and downward, and therefore the discharge pipe is also disposed forward and downward along the bottom of the tank. The tank is once sent to the front of the tank through the discharge pipe, and sent from the front position to the rear part of the tank lorry or the left and right side parts of the lorry, and the liquid is taken out from the position.
[0004]
As described above, since the liquids in the plurality of tank chambers need to be collected once at the front position and sent to the rear side or the left and right sides from the front position, the total length of the discharge pipe is very long. Then, various liquids including various oils are filled and transported in the tanks of such tank trucks, that is, each tank chamber. When the viscosity of the liquid to be filled becomes high, each tank chamber or A large amount of residual liquid is generated in the discharge pipe having a long length. Therefore, conventionally, it has been considered that a high viscosity liquid is difficult to be filled and transported with a tank lorry at the same temperature. Even in the case of a low viscosity liquid, if the total length of the discharge pipe is long as in the conventional case, a residual liquid is generated in the tank chamber or the discharge pipe, and it is not enough to completely discharge the residual liquid. It took time.
[0005]
[Problems to be solved by the invention]
Therefore, it has been conventionally practiced to reduce the viscosity of the high viscosity liquid by raising the liquid temperature, thereby suppressing the generation of residual liquid at the time of unloading as much as possible, and enabling loading and transportation by tank lorries. However, when this type of system is adopted and the temperature of the high viscosity liquid is increased for transportation, the temperature is often changed or deteriorated, and there are incidental facilities that maintain the high temperature of tank tanks and discharge pipes. In addition, it was very expensive, such as loading on a tank lorry and requiring high temperature resistant equipment on the unloading side.
[0006]
The present invention is to solve the conventional problems in view of the above situation, and the inner bottom surface of the tank is inclined downward from the both ends in the tank longitudinal direction and the both sides in the width direction toward the center. As a result, the liquid in each tank chamber is collected in the central part, and the liquid is discharged from the side part and the rear part of the tank lorry from the central part, thereby suppressing the generation of residual liquid when the liquid is discharged as much as possible. This is the main purpose.
[0007]
[Means for Solving the Problems]
The tank lorry of the invention according to claim 1 is formed such that the inner bottom surface of the tank 1 filled with liquid is inclined downward from both ends in the longitudinal direction of the tank to the center and from both sides in the tank width direction to the center. A partition plate 3a bulging rearward is provided near the front in the longitudinal direction, and a partition plate 3b bulging forward is provided near the rear, and these partition plates 3a and 3b provide three parts, a front part, a center part, and a rear part. the tank chamber 4a, 4b, 4c is formed, each tank chambers 4a, 4b, bottom valve 6a most lower position of the bottom of 4c, 6b, provided with a 6c, the bottom valves 6a, 6b, tank to 6c 1 the vertical the handle 22 with the operating shaft 23 which penetrates the bottom valve 6a, by providing vertically just above the 6c, the front and rear of the tank chamber 4a, 4c in the partition plate 3a, the concave side of the 3b Along the Is arranged bundle 22 with the operating shaft 23, also said the composed each tank chamber 4a, 4b, the bottom valve 6a of 4c, 6b, the 6c, communicatively connected to the discharge main pipe 7 at the central portion of the bottom of the tank To do.
[0008]
With the above configuration, in the front tank chamber 4a, the bottom valve 6a can be installed at the lowest position in the tank chamber in the vicinity of the connecting portion at the bottom of the tank chamber inclined backward and the lower portion of the partition plate 3a curved backward. . For this reason, no gap is generated at a position lower than the bottom valve 6a in the front tank chamber 4a. As a result, in the front tank chamber 4a, the remaining liquid becomes small when the cargo liquid is discharged. Similarly, the rear tank chamber 4c becomes small. In the central tank chamber 4b, the bottom valve 6b is naturally located at the lowermost part of the center of the tank, so that the remaining liquid becomes very small when the cargo liquid is discharged.
Moreover, since the pipe length is reduced, the residual liquid in the pipe is reduced accordingly.
[0009]
Moreover, in this invention, the bottom valve located in the tank bottom part and its center part can be opened and closed by handle operation from the tank upper part. At this time, since the front partition plate 3a bulges behind, the inconvenience in space with the operation shaft 23 of the bottom valve 6a for the front tank chamber 4a that is close to the front of the partition plate. Does not occur. Similarly, the rear partition plate 3c and the operation shaft 23 of the bottom valve 6c do not cause any inconvenience.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on the embodiments.
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. 1, FIG. 3A is a plan view showing a tank of the tank lorry, and FIG. FIG. The tank 1 has a double structure of an inner tank 1a and an outer tank 1b as shown in FIGS. 1 and 2, and both the inner and outer tanks 1a and 1b are formed in a flat cylindrical shape as shown in FIG. Has been. As shown in FIGS. 1 and 2, the tank 1 is attached to a chassis 24B of a traveling vehicle 24A.
[0011]
The inner bottom surface 2 of the tank 1 is formed so as to be inclined downward from both ends of the tank in the longitudinal direction of the tank as shown in FIG. 1 and from the both sides of the tank width direction to the center as shown in FIG. The intersection of both central parts is the lowest. The interior of the tank 1 is partitioned into three tank chambers 4a, 4b, 4c by two partition plates 3a, 3b provided in the longitudinal direction. A bottom valve 6b with an emergency shut-off valve 5b is provided at the lowest position of the bottom surface 2 of the central tank chamber 4b (the intersection of the two central portions), and swells even in the tank chambers 4a and 4c before and after that. The bottom valves 6a and 6c with emergency shut-off valves 5a and 5c are provided close to each other at the lowest position of the bottom surface of the tank chamber because they are on the anti-bulging side of the partition plates 3a and 3b. Further, at the upper part of the tank 1, liquid filling ports 8a, 8b, 8c for filling the tank chambers 4a, 4b, 4c with liquid are provided.
[0012]
As shown in FIGS. 1 and 2, the emergency shutoff valves 5a, 5b and 5c with bottom valves 6a, 6b and 6c are connected to a discharge main pipe 7 extending in the tank longitudinal direction on the bottom center side of the tank 1, as shown in FIGS. Each is connected in communication. A discharge pipe 9 extending to one side of the tank lorry perpendicular to the main pipe 7 is connected to the central portion in the longitudinal direction of the discharge main pipe 7, and an opening / closing valve 10 is provided on the discharge end side of the discharge pipe 9. Yes. 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 this branch discharge pipe 11 has an on-off valve 12 on the branch end side. A liquid feed pump 14 with a liquid feed direction switching valve 13 is provided on the lower side (rear side) of the on-off valve 12. 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 is at the lowest position at the substantially center, and the discharge pipe 9 is horizontally installed at the lowest position. Yes.
[0013]
Connected to the discharge pipe 11 branched from the side discharge pipe 9 extending to one side surface of the tank lorry is a pair of side discharge pipes 15 and 16 branched from the lower side of the liquid feed pump 13 and extending to both side surfaces of the tank lorry. On-off valves 17 and 18 are provided on the discharge end sides of the side discharge pipes 15 and 16, respectively. One side discharge pipe 15 of the both side discharge pipes 15 and 16 faces the rear of the tank lorry. The rear discharge pipe 19 extending in a branched manner is branched, and the rear discharge pipe 19 is provided with on-off valves 20 and 21 on the branch end side and the discharge end side, respectively.
[0014]
As shown in FIG. 1, each of the bottom valves 6a, 6b, 6c is provided with a known operation shaft 23 with a handle 22 that penetrates the tank 1 in the vertical direction. The bottom valves 6a, 6b, 6c under the center of the tank can be opened and closed by rotating forward and backward. Since the front and rear bottom valves 6a and 6c are positioned in the opposite direction to the expansion of the adjacent partition plates 3a and 3b, the operation shaft 23 of these bottom valves and the partition plates 3a and 3b are located. There is no inconvenience in terms of space in the bulge. Moreover, although emergency shut-off valves 5a, 5b, and 5c are attached to each bottom valve 6a, 6b, and 6c, since this is well-known, description is abbreviate | omitted.
[0015]
The liquid feed pump 14 with the liquid feed direction switching valve 13 will be described. As shown in FIGS. 4 and 5, openings 25a and 25b communicating with the discharge pipe 11 are provided on both side surfaces, and the liquid feed pump is provided on the lower surface thereof. A valve body 26 having a substantially U-shaped longitudinal section is rotatably disposed in a casing 25 provided with openings 25c and 25d communicating with the discharge port 14a and the suction port 14b, respectively. A flow passage 26a for selectively communicating the suction port 14b with the left and right discharge pipes 11, 11 or the discharge port 14a is formed, and an operating rod 27 is integrally connected to the valve body 26. Reference numeral 28 denotes a pressure regulating valve for releasing the high-pressure liquid on the discharge port 14a side to the suction port 14b side.
[0016]
In the liquid discharge operation of the tank lorry having the configuration described above, the on-off valve 12 on the upper side of the liquid feed pump 14 in the discharge pipe 11 is closed, and the bottom of any one of the tank chambers 4a, 4b, 4c is closed. If the valve 6a, 6b, 6c is opened and the opening / closing valve 10 on the discharge end side of the side discharge pipe 9 connected to the discharge main pipe 7 is opened, the liquid in one of the tank chambers 4a, 4b, 4c Can be naturally discharged from the main discharge pipe 7 to one side of the tank lorry through the side discharge pipe 9. Further, the discharge amount can be adjusted by opening / closing the on-off valve 10.
[0017]
When forced discharge by the liquid feed pump 14 is performed, the open / close valve 10 of the side discharge pipe 9 is closed, and the open / close valve 12 of the discharge pipe 11 branched from the side discharge pipe 9 is opened. When the switch pump 13 is operated by operating the switching valve 13 in the normal liquid feeding direction in which the liquid is fed from the upper side to the lower side, the liquid in the tank chambers 4a, 4b, 4c is discharged from the discharge main pipe 7. It flows to the branch discharge pipe 11 side through the side discharge pipe 9. Therefore, when discharging from one side discharge pipe 15 of the side discharge pipes 15 and 16 connected to the discharge pipe 11 to the outside, the on-off valve 18 on the other side discharge pipe 16 side is closed, By 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, the liquid in any one of the tank chambers 4a, 4b, 4c is discharged. It can be forcedly discharged from the main pipe 7 to one side of the tank lorry through the one side discharge pipe 15 via the liquid feed pump 14 of the discharge pipe 11. When the other side discharge pipe 16 is forced to discharge to the other side of the tank lorry, the open / close valve 17 on the one side discharge pipe 15 side is closed and the open / close valve 18 of the other side discharge pipe 16 is closed. Just open it.
[0018]
Further, when the liquid feed pump 14 forcibly discharges 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 on the upper side. By opening the on-off valve 20 and opening the on-off valve 21 on the discharge end side of the rear discharge pipe 19, the liquid in one of the tank chambers 4 a, 4 b, 4 c is passed through the rear discharge pipe 19 to the rear side of the tank lorry. It can be forcibly discharged. In addition, when the residual liquid in the discharge main pipe 7 and the side discharge pipe 9 is forcibly discharged by the liquid feed pump 14, the liquid feed direction of the liquid feed pump 14 is reversed from the normal direction by the switching valve 13. Switch.
[0019]
When the liquid in the tank chambers 4a, 4b, 4c is discharged to the side of the tank lorry through the side discharge pipe 15 or 16, or to the rear side of the tank lorry through the rear discharge pipe 19, as described above. Regardless of the forced discharge by the liquid feed pump 14, the liquid feed pump 14 can be stopped and discharged naturally.
[0020]
As described above, the liquid in the tank chambers 4a, 4b, and 4c is naturally discharged or forcedly discharged from the discharge main pipe 7 to the side and rear of the tank lorry through the side discharge pipes 9, 15, 16 and the rear discharge pipe 19. However, the inner bottom surface 2 of the tank 1 is formed so as to be inclined downward from both ends of the tank in the longitudinal direction to the center and from both sides in the tank width direction to the center, and is partitioned into three. Since the bottom valves 6a, 6b, 6c are provided at the lowest positions of the tank chambers 4a, 4b, 4c, and these bottom valves 6a, 6b, 6c are connected to the discharge main pipe 7, the tank 1 When all the liquid is discharged, the liquid in each tank chamber 4a, 4b, 4c can be completely dropped into the discharge main pipe 7. Therefore, even if the liquid has a relatively high viscosity, each tank chamber 4a, 4 , It does not occur in the residual liquid to 4c.
[0021]
After the tank 1 is emptied as described above, when the drainage pipes below the tank 1 are washed, the bottom valves 6a, 6b, 6c of the tank chambers 4a, 4b, 4c are closed and the discharge pipes are closed. Open the on-off valves 10, 12, 17, 18, 20, 21 provided at 9, 11, 15, 16, 19, and from the discharge end of the side discharge pipe 9 connected to the discharge main pipe 7, for example By supplying steam under pressure, the pressurized steam is introduced from the side discharge pipe 9 into the discharge main pipe 7 and the discharge pipe 11, and the steam introduced into the discharge pipe 11 is supplied to the side discharge pipes 15, 16. , And further through the rear discharge pipe 19 to the outside from the discharge ends of the discharge pipes 15, 16, 19 so that the inside of these pipes can be thoroughly cleaned. The steam supply point may be any discharge end of the discharge pipes 9, 15, 16, and 19. Further, instead of steam, water may be supplied under pressure. When washing with water, the liquid feed pump 14 may be operated.
[0022]
In this tank lorry, as described above, 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. The bottom valves 6a, 6b and 6c are provided at the lowest positions of 4a, 4b and 4c, and these bottom valves 6a, 6b and 6c are connected to the discharge main pipe 7, and one tank lorry is connected to the discharge main pipe 7. A side discharge pipe 9 extending to the side is connected to a discharge pipe 11 branched from the side discharge pipe 9, and a pair of side discharge pipes 15 extending from the lower side of the liquid feed pump 14 to both side portions of the tank lorry, 16, and a rear discharge pipe 19 extending from one side discharge pipe 15 of both side discharge pipes 15, 16 to the rear part of the tank lorry is branched, so that the discharge pipe is connected to the center of the bottom of the tank 1. The total length of the discharge pipe can be shortened as much as possible, thereby reducing the residual liquid inside the discharge pipe as much as possible and facilitating the discharge of the residual liquid. .
[0023]
In the illustrated embodiment described above, as shown in FIGS. 1 and 2, it is branched from the side discharge pipe 9 that is connected to the discharge main pipe 7 and extends to one side surface of the tank lorry, as shown in FIGS. 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 the discharge pipe 11 and extended from either one of the both side discharge pipes 15 and 16 to the rear part of the tank lorry. Although the pipe configuration in which the rear discharge pipe 19 is branched is adopted, the pipe suitable for the tank of the present invention is not limited to this configuration.
[0024]
That is, a discharge pipe (corresponding to the discharge pipe 11 in FIG. 2) connected to the discharge main pipe 7 and extending from the side discharge pipe 9 extending to one side of the tank lorry to the rear of the tank lorry is branched. A liquid feed pump 14 is provided, an on-off valve (corresponding to the on-off valve 12 in 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) is provided on the discharge end side. May be provided. In this case, the piping is very simple and the total length of the discharge pipe can be minimized, but the liquid is discharged at two locations, one at the side and one at the rear of the tank lorry, which are required at the minimum. It can be performed.
[0025]
Furthermore, another side discharge pipe (side part in FIG. 2) extending from the lower side of the liquid feed pump 14 to the other side part of the tank lorry is connected to the discharge pipe 11 branched from the side part discharge pipe 9 extending to one side part of the tank lorry. A discharge pipe 15 is connected, an open / close valve (corresponding to the open / close valve 17 in FIG. 2) 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 truck (FIG. 2). The rear discharge pipe 19 is branched, an on-off valve (corresponding to the on-off valve 20 in FIG. 2) is provided on the branch end side of the rear discharge pipe, and an on-off valve (on-off valve in FIG. 2) is provided on the discharge end side. 21) may be provided. In this case, the piping is simple, the total length of the discharge pipe can be sufficiently shortened, and the liquid can be discharged at three places, two on the side of the tank lorry and one on the rear.
[0026]
【The invention's effect】
According to the tank lorry of the invention according to claim 1, the inner bottom surface of the tank is formed to be inclined downward from both ends of the tank in the longitudinal direction of the tank to the central portion and from both sides of the tank in the width direction of the tank to the central portion. A partition plate with a bulge on the rear side is provided near the front part, and a partition plate with a bulge on the front side is provided near the rear part, and these partition plates form three tank chambers of a front part, a central part, and a rear part. Since the bottom valve is provided at the lowest position of the bottom of 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, the liquid in the tank When all of the liquid is discharged, the liquid in each tank chamber can be completely dropped into the main pipe for discharge, and therefore no residual liquid is generated in each tank chamber even with a relatively high viscosity liquid.
[0027]
Further, according to the present invention, the bottom valve of each tank chamber is opened and closed by forward and reverse rotation of an operating shaft with a handle , and further, this operating shaft does not interfere with the bulge portion of the partition plate in space, so It becomes possible to connect as it is. For this reason, the bottom valve located at the bottom of the tank chamber and in the center can be opened and closed by operating the handle.
[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.
3A is a plan view showing a tank of a tank lorry, and FIG. 3B is a cross-sectional view of the tank.
FIG. 4 is a longitudinal sectional view of an essential part of a liquid feed pump with a switching valve.
5 is a cross-sectional view taken along line YY in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tank 2 Inner bottom face 3a, 3b Partition plates 4a, 4a, 4c Tank chamber 6a, 6b, 6c Bottom valve 7 Main discharge pipes 9, 15, 16 Side discharge pipe 11 Discharge pipe 19 Rear discharge pipes 10, 12, 17 On-off valve 18, 20, 21 On-off valve 13 Switching valve 14 Liquid feed pump 22 Handle 23 Bottom valve operating shaft

Claims (1)

The inner bottom surface of the tank filled with liquid is inclined downward from both ends of the tank in the longitudinal direction of the tank and from both ends of the tank in the width direction of the tank to the center, and bulges backward in the tank toward the front in the longitudinal direction. A partition plate with a bulge in the front is provided near the rear, and these partition plates form three tank chambers in the front, center, and rear. The lowest position of the bottom of each tank chamber In addition, a bottom valve is provided in each of the bottom valves, and an operating shaft with a handle penetrating the tank in the vertical direction is provided vertically above the bottom valve. along the side is arranged the operating shaft with the handle, also the bottom valve of each tank chamber, tank bottom tank truck comprising communicatively connected to the discharge main pipe at the central portion of the.

Images