JPS583912B2 - Gouseijiyushiseitan Crowley Noseizouhouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a synthetic resin tank for a tank truck mainly used for transporting liquids.

Conventional A: This type of tank is designed to prevent the liquid content from directly hitting the wall of the main container due to the agitation of the liquid when the tank truck starts or stops suddenly, and to ensure that the agitation of the liquid does not impede the maneuverability of the vehicle. A bulkhead is installed inside the vessel using a buffer plate, but this bulkhead can be used to compress the contents when starting or stopping suddenly, and when air pressure is applied during unloading. It is necessary to have the strength to withstand pressure.

For this purpose, the bulkhead must be as thick as possible, but if the bulkhead is too thick, the weight of the tank will be too thick, and the characteristic of being made of synthetic resin will be lost.

In order to prevent this, it is necessary to strengthen the partition walls, so conventional partition walls are either inferior in strength or have extremely complicated structures.

In addition, in the case of synthetic resin tanks, the bending strength of the material is poor and they are vulnerable to concentrated stress that acts at the joint where the curved surface transitions to the tubular body, so conventional tanks are prone to cracks in this part of the bulkhead or end plate. Many cases resulted in leakage of the liquid contents.

These causes include compression of the liquid content when starting or stopping suddenly,
This is thought to be due to repeated concentrated stress caused by the vibrations of other vehicles and the effects of air pressure during unloading.

The object of the present invention is to improve the above-mentioned drawbacks and provide a method for manufacturing a synthetic resin tank for a tank truck, which has a simple structure and strong bulkheads and head plates.

The present invention will be described with reference to an embodiment shown in the drawings. Reference numerals 1 and 2 are tubular bodies made of, for example, polyvinyl chloride (PVC).

The tubular body 1 is provided with a liquid outlet 1', and the tubular body 2 is provided with a manhole-cum-liquid filling port 2'.

Reference numerals 3 and 4 indicate end plates having a cylindrical portion 1 integrally extended from the periphery, and are made of, for example, a laminate of PVC and glass fiber reinforced plastics (FRP).

5 is a bowl-shaped convex portion, and a cylindrical portion l is integrally formed from the periphery.
is extended and a hole 5' is provided in the lower part.

6 forms a concave shape that fits the convex part 5, and furthermore, the peripheral part of the concave shape forms a curved surface opposite to the concave shape, and furthermore, a concave shape in which a cylindrical part l is integrally extended from the curved surface. with hole 6 at the bottom.
' is provided.

It is desirable that the lengths in the axial direction of the cylindrical portions l of the mirror plates 3 and 4, the convex portion 5, and the concave portion 6 are each 10 cr or more.

Although it is not necessary to provide the holes 5/ and 6/, in that case, it is necessary to provide each independent tank with a liquid outlet and a manhole/filling port.

The convex portion 5 and the concave portion 6 are made of, for example, a PVC-FRP laminate.

To carry out this manufacturing method, first the convex portion 5 is molded on a mold.
As shown in FIG. 2, the concave portions 6 are bonded over the entire surface and bonded using, for example, polyester resin or preferably FRP as an adhesive layer.

In this way, the convex portion 5 and the concave portion 6 form a partition wall A having a hole 9 at its lower portion.

The circumferential edges of one end of the pair of tubular bodies 1 and 2 are brought into contact with the same edge surfaces of the cylindrical portions on both sides of the partition wall A, respectively, and welded together using a PVC welding rod 7, as shown in FIG. 3, for example. .

In this case, it goes without saying that the diameter of the cylindrical portion l should be equal to the diameter of the tubular bodies 1 and 2.

In the figure, 5a and 6a are FRP layers, and 5b and 6b are PVC layers.

Reference numeral 8 is an FRP layer reinforced by laminating from the outside from the part where the partition wall A and the tubular body 1 are welded together with the welding rod 1 to the part where the partition wall A and the tubular body 2 are welded together with the welding rod 7. be.

The reinforcing fibers of the FRP layers 5a and 6a are preferably continuous from the curved portion to the cylindrical portion l.

In this way, it is possible to prevent the occurrence of cracks in the transition portion B from the curved surface to the tubular portion.

Next, the peripheral surfaces of the cylindrical portions l of the end plates 3 and 4 are butted and bonded to the peripheral surfaces of the other ends of the tubular bodies 1 and 2 in the same manner.

At this time, the diameter of the cylindrical portion l is the same as in the case of the partition wall.
In this case, the reinforced FRP of the end plate should be equal to the diameter of
It is preferable that the reinforcing fibers in the layer continue from the curved surface to the cylindrical portion, as in the case of the bulkhead partition wall, thereby preventing the occurrence of cracks at the transition portion from the curved surface to the tubular portion.

FRP layers can be formed on the outer shells of the tubular bodies 1 and 2 using the thus formed tank shape as a core.

FIG. 3' shows a case where the tubular bodies 1 and 2 are made of a laminate of PVC and FRP.

This tank is mounted on a tank truck with the direction of arrow A facing forward, and is used for transporting liquids.

When the tank truck suddenly stops and the liquid inside presses the convex part 5 in the direction of arrow A as shown in Fig. 6, the stress due to the pressure is transmitted from the convex part 5 to the concave part 6, The peripheral edge of 6 is a curved surface in the opposite direction to the concave curved surface, and is distributed from the curved surface to the peripheral wall of the tubular body 2 via the cylindrical portion l,
Therefore, the partition wall A can sufficiently resist the above-mentioned stress and withstand the hydraulic pressure, and can also withstand the hydraulic pressure even when pressure is applied in the opposite direction to the arrow A in the case of a sudden start.

The material of the tank to which this manufacturing method is applied may be a laminate of thermoplastic resin such as polypropylene, polyethylene, Teflon, etc. and FRP other than this example, and the reinforcing fibers in FRP may be carbon fiber, chemical synthetic resin, etc. Organic or inorganic fibers such as fibers may be used.

Since the present invention has the above-mentioned configuration, the partition wall has a double structure in which the convex part and the concave part are fully bonded, and the structural strength is excellent.

In addition, since the peripheral surface of the cylindrical portion of the partition wall is butt-joined to the peripheral surface of one end of the tubular body, the stress applied to the partition wall is dispersed from the cylindrical portion to the local wall of the tubular body. The strength is large in balance with the above structural strength.

Further, since the joints between the partition wall and the tubular body, and between the end plate and the tubular body are flush with each other, no extra hydraulic pressure is applied to the joints.

Further, the FRP layer can be laminated on the outer shell of the tubular body made of thermoplastic resin by using a partition wall or a mirror plate in place of a formwork, and the tank can be manufactured easily and the manufacturing cost can be reduced.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway exploded side view, Fig. 2 is a sectional view of the partition wall showing the joined state, and Figs. 3 and 3' are the partition wall and the tubular shape. Figure 4 is a partially cutaway side view of the tank manufactured by this method, Figure 5 is a cross-sectional view taken along the line a-a' in Figure 4, and Figure 6 is a partial cross-sectional view of the joint with the body. FIG. 3 is an enlarged side sectional view of the partition wall showing the transmission mode. In the figure, 1, 2...tubular body, 3, 4...
End plate, A... Partition wall, 5... Convex portion, 6
・・・・・・Concave part.

Claims (1)

[Scope of Claims] 1. In the manufacture of a synthetic resin tank for a tank truck having a partition wall in the intermediate portion, a convex portion made of synthetic resin that is bowl-shaped and has a cylindrical portion integrally extended from the periphery; A concave shape that fits the shape is formed, and the peripheral edge of the concave shape forms a curved surface opposite to the concave shape, and a concave part made of synthetic resin is formed by integrally extending a cylindrical part from the curved surface. , the entire surface is bonded and bonded to form a partition wall, and on the peripheral surface of the cylindrical part on both sides of the partition wall,
The peripheral surfaces of one end of a pair of synthetic resin tubular bodies are abutted and adhesively bonded, and a cylindrical portion is integrally extended from the peripheral edge to the peripheral surface of the other end of the pair of synthetic resin tubular bodies. A method for manufacturing a synthetic resin tank for a tank truck, characterized in that the peripheral surfaces of the cylindrical portions of the bowl-shaped end plates are butted against each other and adhesively bonded to close the tank. 2. In the manufacture of synthetic resin tanks for tank trucks that have a partition wall in the middle, a thermoplastic synthetic resin convex part that is bowl-shaped and has a cylindrical part integrally extended from the periphery, and that fits the convex part. A concave shape is formed, and the peripheral edge of the concave shape forms a curved surface opposite to the concave shape, and a fiber-reinforced concave portion is formed between the concave portion made of thermoplastic synthetic resin and a cylindrical portion integrally extended from the curved surface. A thermosetting synthetic resin layer is sandwiched between the two and bonded and bonded to form a partition wall, and a tubular body made of thermoplastic synthetic resin whose outer side is reinforced with fiber-reinforced thermosetting synthetic resin is provided on the peripheral surface of the cylindrical portion on both sides of the partition wall. Alternatively, the circumferential surfaces of one end of an unreinforced thermoplastic synthetic resin tubular body are abutted and adhesively bonded, and a cylindrical portion is integrally extended from the circumferential edge to the circumferential surface of the other end of the tubular body, and the outside is reinforced with fibers. The peripheral surfaces of the cylindrical parts of the thermoplastic synthetic resin bowl-shaped mirror plate reinforced with thermosetting synthetic resin or the thermoplastic synthetic resin bowl-shaped mirror plate without reinforcement are butted together and closed, and then the cylindrical part of the partition wall is closed. A method for producing a synthetic resin tank for a tank truck, characterized in that fiber-reinforced thermosetting synthetic resin is laminated and reinforced on the outer surface of the adhesive joint portion of the part and the tubular body and the cylindrical part of the end plate and the tubular body. 3. In the manufacture of synthetic resin tanks for tank trucks that have a partition wall in the middle, a bowl-shaped thermoplastic synthetic resin convex part with a cylindrical part integrally extended from the periphery, and a recess that fits the convex part are used. Furthermore, the peripheral edge of the concave shape forms a curved surface with the opposite concave shape, and a fiber-reinforced thermoplastic resin is formed between the concave portion made of thermoplastic synthetic resin and the cylindrical portion integrally extending from the curved surface. A curable synthetic resin layer is sandwiched between the curable synthetic resin layers and the two are bonded together to form a partition wall, and a thermoplastic synthetic resin tubular body reinforced with fiber-reinforced thermosetting synthetic resin on the outside or not reinforced on the peripheral surface of the cylindrical portion on both sides of the partition wall. The circumferential surfaces of one end of a thermoplastic synthetic resin tubular body are abutted and adhesively bonded, and a cylindrical portion is integrally extended from the circumferential edge to the circumferential surface of the other end of the tubular body, and the outside is made of fiber-reinforced thermosetting synthetic resin. The peripheral surfaces of the cylindrical portions of the resin-reinforced thermoplastic bowl-shaped end plate or the non-reinforced thermoplastic synthetic resin bowl-shaped end plate are butted together and closed, and then the cylindrical portion of the partition wall, the tubular body, and the cylindrical shape of the end plate are closed. In a method for manufacturing a synthetic resin tank for a tank truck, in which the outer surface of the adhesive joint between the part and the tubular body is reinforced by laminating a fiber-reinforced thermosetting synthetic resin, from the concave and convex parts of the bulkhead to the cylindrical part. A method for manufacturing a synthetic resin tank for a tank truck, characterized in that the outer surface is lined and reinforced with a thermosetting synthetic resin reinforced by laminating using continuous fibers. 4 In the manufacture of synthetic resin tanks for tank trucks having a partition wall in the middle, a bowl-shaped convex portion made of thermoplastic synthetic resin with a cylindrical portion integrally extended from a solid edge, and a convex portion compatible with the convex portion. A concave shape is formed, and the peripheral edge of the concave shape forms a curved surface opposite to the concave shape, and a fiber-reinforced concave portion is formed between the concave portion made of a plastic synthetic resin and a cylindrical portion integrally extended from the curved surface. A thermosetting synthetic resin tubular body or reinforcement made by sandwiching a thermosetting synthetic resin layer and joining the two to form a partition, and reinforcing the outer side of the peripheral surface of the cylindrical portion on both sides of the partition with fiber-reinforced thermosetting synthetic resin. The circumferential surfaces of one end of a thermoplastic synthetic resin tubular body are butted and bonded to each other, and a cylindrical portion is integrally extended from the circumferential edge to the circumferential surface of the other end of the tubular body, and the outside is made of fiber-reinforced thermosetting resin. The peripheral surfaces of the cylindrical portions of the thermoplastic bowl-shaped head plate reinforced with synthetic resin or the thermoplastic synthetic resin bowl-shaped head plate without reinforcement are butted together and closed, and then the cylindrical portion of the partition wall, the tubular body, and the cylinder of the head plate are closed. In the method for manufacturing synthetic resin tanks for tank trucks, the outer surface of the bonded joint of the tubular body is reinforced by laminating fiber-reinforced thermosetting synthetic resin on the outer surface of the bonded joint part of the tubular body. A method for manufacturing a synthetic resin tank for a tank truck, characterized in that the outer surface is lined and reinforced with a thermosetting synthetic resin.