JPH0339914B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a synthetic resin tank for a tank truck mainly used for transporting liquids.

[Background of the invention]

This type of tank has a structure in which the inside is made of thermoplastic synthetic resin and the outside is covered with an FRP layer. In addition, the tank is designed to reduce the impact force on the tank wall due to the agitation of the liquid content when the tank truck starts, runs, or stops, thereby preventing deformation and damage to the tank and preventing the maneuverability of the tank truck from being impaired. There is a partition wall inside. The partition wall needs to have strength to withstand the impact force caused by the agitation of the content liquid.

[Conventional technology]

Conventionally, to manufacture such a tank, the 10th
A method is provided as shown in FIGS.

In the figure, 1 is a convex part, 2 is a concave part, and a communication hole 1A is provided at the bottom of the convex part 1,
The concave part 2 has a concave shape that matches the convex part 1, and a similar communication hole 2A is provided at the lower part, and a curved surface 2B opposite to the concave shape is formed on the peripheral edge of the concave shape. There is. The convex part 1 and the concave part 2 are joined via FRP layers (glass fiber reinforced plastic layers) 3 and 4.
The tubular body 5 is passed between the two. After the convex part 1 and the concave part 2 are bonded together in this way to form the partition wall 6 having the communication hole 6A, the convex part 1 side and the concave part 2 side are separated as shown in FIG. One end of each of the tubular bodies 7 and 8 is joined by welding. Note that there is a manhole 8A at the top of the tubular body 8, and a drain port 7 at the bottom of the tubular body 7.
A is provided. Next, as shown in FIG. 12, end plates 9 and 10 having the same shape as the convex portion 1 are welded to the other ends of the tubular bodies 7 and 8, respectively, and FRP layers 11 and 12 are formed on the surfaces of the end plates 9 and 10. is coated. Thereafter, the entire surface of the tubular body 7, convex portion 1, concave portion 2, tubular body 5, and tubular body 8 is coated with an FRP layer 13 to obtain a tank 14. The structure of the partition wall 6 of the tank 14 is such that liquid pressure can be easily dispersed, and the structure has high structural strength.

[Problem that the invention seeks to solve]

However, in the above conventional example, the portions of the FRP layer 13 covering the tubular bodies 7 and 8 overlap and bulge out over the FRP layers 11 and 12 that cover the surfaces of the mirror plates 9 and 10, and furthermore, the convex portion 1 and the concave portion 2 are formed. Since the annular body 5 protrudes at the joint, the FRP layer 13 in this part
It also swells. If there are bulging portions 13A, 13B, and 13C on the surface of the tank 14 in this way, the shape of the liquid barrier 15 provided at the upper part of the tank 14 will be complicated and it will take time and effort to manufacture. 1
There is a problem in that liquid accumulates in the concave portions other than 3A, 13B, and 13C, and the FRP layer 13 in these portions comes into contact with the liquid for a long period of time and is corroded. Furthermore, when this kind of tank 14 is installed in a car, the front part is sloped so that it is slightly higher so that as little liquid as possible remains in the tank 14 when it is removed, but for reasons of strength. Therefore, the liquid drain port 7A must be provided on the tubular bodies 7 and 8 rather than on the end plates 9 and 10, and since the end plates 9 and 10 are convex, that is, concave when viewed from the inside, liquid will not accumulate at the bottom of the end plates. There are some problems that make it easy.

[Means for solving problems]

As a means to solve the above-mentioned conventional problems, the present invention has a bowl shape, has flange portions 9D and 10D extending on the periphery, and has step portions 9C and 10C formed in the middle of the flange portions 9D and 10D. Part 9C, 10
A pair of end plates with FRP layers 11 and 12 provided on the surfaces up to C are attached to the flange portions 9D and 10 of the end plate.
The outer end surfaces of the flange parts 9D and 10D of the end plates 9 and 10 are butt-jointed to both ends of the tubular body 7 having the same outer diameter as the large outer diameter of D, and the outer periphery of the tank core 16 obtained in this way is The present invention provides a synthetic resin tank 14 for a tank truck covered with an FRP layer 13, further having a bowl shape with a flange portion 1D extending around the periphery and a step portion 1C formed in the middle of the flange portion 1D. A convex part 1 made of synthetic resin and a concave shape that fits the convex part 1 are formed, and the peripheral edge of the concave part 2 forms a curved surface opposite to the concave shape, and a flange part 2D is formed on the peripheral edge. Extension and flange part 2D
When joining the concave part 2 made of synthetic resin with a stepped part 2C formed in the middle of the convex part 1, an FRP layer 3 is provided on the surface from the center of the convex part 1 to the stepped part 1C. On the surface from the center of 2 to the step 2C
A partition wall 6 is formed by providing an FRP layer 4 and joining the convex portion 1 and the concave portion 2 via the FRP layers 3 and 4.
Between the FRP layer 3 and the FRP layer 4 of the concave portion 2 is an annular body 5 whose outer diameter is equal to the large outer diameter of the flange portions 1D and 2D.
and reaches the outer periphery of the flange parts 1D and 2D between the flange parts 1D and 2D, and further the convex part 1
The flange portion 1D of the concave portion 2 and the flange portion 2D of the concave portion 2
One ends of synthetic resin tubular bodies 7 and 8 having the same outer diameter as the large outer diameter of the flange parts 1D and 2D are butted and joined to the outer end surfaces of the flange parts 1D and 2D, respectively, and the tubular bodies 7,
Synthetic resin mirror plates 9 and 10 having the same shape as the convex portion 1 are joined to the other end of the mirror plate 8 via the flange portions 9D and 10D, and a stepped portion 9 is inserted from the center of the mirror plates 9 and 10.
FRP layers 11 and 12 on the surfaces up to C and 10C
The tank core body 17 obtained in this way
Synthetic resin tank 1 for a tank truck, the outer periphery of which is covered with an FRP layer 13 and a partition wall 6 in the middle.
4.

[Effect]

The effects of the first invention are as follows.

There is a step in the middle of the flange extending from the periphery of the end plate, and using this as a guide, an FRP layer is provided on each surface from the center to the step. Then, the pair of end plates are connected to both ends of the tubular body, and since the outer diameter of the tubular body is equal to the large outer diameter of the flange portion of the end plate, an FRP layer is placed on the outer periphery of the tank core thus obtained. When covering the surface, there is no bulge and the surface can be completely flush.

The effects of the second invention are as follows.

When hydraulic pressure is applied to the partition from the convex side, the hydraulic pressure is transmitted to the concave side and further transmitted to the tubular body via the opposite curved surface of the concave periphery. Further, when hydraulic pressure is applied from the concave portion side, the hydraulic pressure is transmitted to the convex portion side and further transmitted to the tubular body. In this way, hydraulic pressure is distributed from the septum to the tubular body. When constructing the above partition walls, the convex and concave parts are made of FRP.
There is a stepped part in the middle of the flange part that is joined through the layers but extends to the convex part and the concave part, and using this as a guide, the surface from the center to the stepped part is
Provide an FRP layer. In addition, the annular body has an outer diameter equal to the large outer diameter of the convex and concave flange parts, and the end plate is also coated with an FRP layer from the center to the step, so FRP is used in the tank core. There is no bulging part of the layer, and when covering this outer periphery with the FRP layer, it can be made completely flush.

Furthermore, the tanks according to the first and second inventions are installed in a car with the front part slightly elevated, but if the liquid is drained in this state, even if the drain port is provided on the tubular body side, the stepped part of the end plate will fall off. The liquid on the end plate side flows down the step and is guided to the tubular body side.

〔Effect of the invention〕

Therefore, in the present invention, when the outer periphery of the tank is flush with the liquid barrier and a liquid barrier is provided at the top, the structure of the liquid barrier becomes simple and easy to manufacture, and the liquid does not accumulate inside the liquid barrier. There is no possibility that the FRP layer will be corroded due to long-term contact with liquid. The tank thus has great durability. Furthermore, since a step is provided between the end plate, the convex portion, and the flange portion of the concave portion, the FRP layer can be formed using this step as a guide, making the work easier and more uniform. Conventionally, there is no such guideline, so the formation of the FRP layer is done by the operator's eye, making the work laborious and uneven. Furthermore, since there is a step on the end plate, no liquid remains at the bottom of the end plate. Furthermore, in the second invention, the structural strength of the partition wall is extremely high.

〔Example〕

To explain the first invention with reference to an embodiment shown in FIGS. 1 to 3, reference numerals 9 and 10 represent a pair of mirror plates, and flange portions 9D and 10D extend from the periphery of the mirror plates. , 10D has a stepped portion 9C, 1
0C is formed. Thus, the flange portion 9
D and 10D are divided into a small diameter portion and a large diameter portion by step portions 9C and 10C, and as shown in FIG. 1, the outer diameter (large outer diameter) of the large diameter portion is r. 7 is a tubular body whose outer diameter is the flange portion 9 of the end plates 9 and 10.
The diameter is r, which is equal to the large outer diameter of D and 10D, and a drain port 7A is provided at the bottom of the tubular body 7, and a manhole 7B is provided at the top. the pair of mirror plates 9;
10 is joined to both ends of the tubular body 7 as shown in FIG. 2 by abutting the outer end surfaces of the flange portions 9D and 10D. Joining is done by welding. In this way, before or after joining the end plates 9, 10 to the tubular body 7, the flange portion 9D,
On the surface up to step parts 9C and 10C of 10D
FRP layer (glass fiber reinforced plastic layer) 11,
12 are laminated by, for example, a hand lay-up method. When laminating the FRP layers 11 and 12, it is easier to work by using the stepped portions 9C and 10C of the flange portions 9D and 10D as a guide, and the FRP layers 11 and 1
2 are uniformly stacked. In this way, the tank core body 16 is assembled. Since the tank core 16 is flush with the entire surface and has no bulge, the tank core 1
6 is coated with an FRP layer 13 as shown in FIG. 3, the entire surface is flush with no bulges. In this way, the tank 14 of the tank truck is obtained.

To explain the second invention with reference to an embodiment shown in FIGS. 4 to 8, 1 is a convex portion, a communicating hole 1A is provided in the lower part, and a flange portion 1D is extended on the periphery. And a stepped portion 1C is provided in the middle of the flange portion 1D.
is formed. Reference numeral 2 denotes a concave portion, with a communicating hole 2A provided at the lower part, a curved surface 2B opposite to the concave shape formed at the peripheral edge, and a flange portion 2D at the peripheral edge.
is extended, and a step portion 2C is formed in the middle of the flange portion 2D. The concave portions 2 are shaped to match the convex portions 1, and each has a large outer diameter r as shown in FIG. Layers 3 and 4 are laminated, bonded together in an uncured state, and then cured. On this occasion
The FRP layers 3 and 4 are laminated on the surfaces of the convex portion 1 and the concave portion 2 from the center to the stepped portions 1C and 2C, respectively. By doing this, the stepped portions 1C and 2C will serve as a guide for laminating the FRP layers, making it easier to work and
are layered uniformly. Furthermore, the convex part 1 and the concave part 2
An annular body 5 is placed between the FRP layers 3 and 4 at the same time as they are bonded. As shown in FIG. 5, the outer diameter of the annular body 5 is the flange portion 1D of the convex portion 1 and concave portion 2,
It is equal to the large outer diameter r of 2D. In this way, the convex portion 1 and the concave portion 2 form a partition wall 6 having a communicating hole 6A at its lower portion. Next, as shown in FIG. 6, one ends of the tubular bodies 7 and 8 are abutted against the outer end surfaces of the flange parts 1D and 2D, respectively, and joined by welding. A drain port 7A is provided at the bottom of the tubular body 7,
A manhole 8A is provided in the upper part of the tubular body 8, and the outer diameter of the outer tubular bodies 7 and 8 is equal to the large outer diameter r of the flange parts 1D and 2D of the convex part 1 and the concave part 2. Furthermore, end plates 9 and 10 are joined to the other ends of the outer tubular bodies 7 and 8 by welding, as shown in FIG. The end plate 9,
Reference numeral 10 has flange portions 9D and 10D which have the same shape as the convex portion 1 and have stepped portions 9C and 10C, respectively, extending therefrom. In this way, the tank core body 17 is assembled, and the end plates 9, 10 of the tank core body 17
and stepped portions 9C of flange portions 9D and 10D from the center,
The part up to 10C is covered with FRP layers 11 and 12, and then the entire tank core 17 is covered as shown in FIG.
Cover with FRP layer 13. The FRP layers 11 and 12 covering the end plates 9 and 10 are laminated on the surfaces up to the step portions 9C and 10C using the step portions 9C and 10C as a guide, thereby making the work easier and uniform. Then, with the tank head plates 9 and 10 covered with FRP layers 11 and 12, the tank core body 1 is
7 has no bulge at all and is flush. Therefore, when the FRP layer 13 is coated on the tank core 17, the FRP layer 13 is also flush with no bulges.

Therefore, in the case of both the first invention and the second invention, when the liquid barrier 15 is provided at the upper part of the tank 14 as shown in FIG. 9, the shape of the liquid barrier 15 is not complicated and manufacturing is simple. It is. In the tank 14, the convex portion 1, concave portion 2, annular body 5, tubular bodies 7, 8, and end plates 11, 12 are made of polyvinyl chloride, polyvinyl fluoride, polyvinylidene fluoride, acrylonitrile-styrene-butadiene copolymer. The material is thermoplastic synthetic resin such as polyethylene, polypropylene, etc. When the tank 14 is mounted on a tank truck, it is tilted so that the end plate 12 side is forward and the front side is slightly higher. Then, the liquid in the tank 14 is taken out from the drain port 7A, but in the end plate 10, the liquid flows down the step 10C and does not accumulate on the end plate 10, and on the end plate 9 side, the liquid flows down the step 9C and is drained. Although the liquid is taken out from the liquid port 7A and tries to flow backwards due to its weight and enter the end plate 9, it is blocked by the stepped portion 9C, so it is unlikely that the liquid will remain in the tank 14.

The present invention is not limited to the above embodiments.

For example, by joining the two without providing the communication hole 1A of the convex part 1 and the communication hole 2A of the concave part 2 in the second invention, and therefore providing the partition wall 6 without the communication hole 6A, it is possible to make each part independent. form a chamber with
A synthetic resin tank for a tank truck may be manufactured having a manhole and a drain port in each chamber, or may be one in which two, three, or four chambers are connected. In this case, each chamber can be filled with a different liquid for transport.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the first invention, and FIG. 1 is a sectional view of the end plate and the tubular body, and FIG.
The figure is a sectional view of the tank core, Figure 3 is a sectional view of the tank,
4 to 8 show an embodiment of the second invention, FIG. 4 is a sectional view of the convex portion and the concave portion, and FIG. 5 is a cross-sectional view of the convex portion and the concave portion. 6 is a sectional view of the joined state of the tubular body, FIG. 7 is a sectional view of the tank core, FIG. 8 is a sectional view of the tank, FIG. 9 is a perspective view of the tank, and FIGS. 10 to 14. The figures show a conventional example: Fig. 10 is a sectional view of the convex part and concave part joined together, Fig. 11 is a sectional view of the tubular body joined, and Fig. 12 is a sectional view of the tank core. , FIG. 13 is a sectional view of the tank, and FIG. 14 is a perspective view of the tank. In the figure, 1... Convex portion, 1C... Stepped portion, 1D...
Flange part, 2...Concave part, 2B...Curved surface, 2C
...Stepped part, 2D...Flange part, 3, 4, 11,
12, 13... FRP layer, 5... Annular body, 6...
Partition wall, 7, 8... Tubular body, 9, 10... End plate, 9
C, 10C...Step part, 9D, 10D...Flange part, 14...Tank, 16, 17...Tank core body.

Claims (1)

[Scope of Claims] 1. A mirror plate that is bowl-shaped and has a flange extending along its periphery, a stepped portion formed in the middle of the flange, and an FRP layer provided on each surface from the center to the stepped portion. The outer end surface of the flange portion of each end plate is butt-jointed to both ends of a tubular body having the same outer diameter as the large outer diameter of the flange portion of the end plate, and the outer periphery of the tank core obtained in this way is A synthetic resin tank for a tank truck characterized by being coated with an FRP layer. 2. A convex part made of synthetic resin that is bowl-shaped and has a flange extending around the periphery and a stepped part in the middle of the flange, and a concave shape that fits the convex part, and further includes a concave part. The peripheral edge of the part forms a curved surface opposite to the concave shape, and a flange part is extended to the peripheral edge, and a step part is formed in the middle of the flange part. An FRP layer is provided on the surface from the center of the shaped part to the stepped part, and an FRP layer is provided on the surface from the center of the concave part to the stepped part, and the convex part and the concave part are connected. A partition is formed by joining the FRP layer through the FRP layer, and at this time, a ring-shaped body with an outer diameter equal to the large outer diameter of the flange is inserted between the FRP layer of the convex part and the FRP layer of the concave part. Furthermore, one end of a synthetic resin tubular body having the same outer diameter as the large outer diameter of the flange portion is butted and joined to the outer end surfaces of the flange portion of the convex portion and the flange portion of the concave portion, respectively. At the same time, a synthetic resin end plate having the same shape as the convex portion is joined to the other end of the tubular body via a flange portion, and an FRP layer is provided on the surface from the center of the end plate to the stepped portion. A synthetic resin tank for a tank truck having a partition wall in the middle, characterized in that the outer periphery of the tank core obtained by the process is covered with an FRP layer.