JPS5840499B2 - Manufacturing method of reinforced plastic rotary tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reinforced plastic (hereinafter simply abbreviated as FRP) formed into a tank car for transporting liquid or gas.

) relates to a manufacturing method for a lorry tank manufactured by

Traditionally, the material of lorry tanks has been stainless steel (SS, 5
US), but in recent years FRP is often used to reduce weight.

The shape of a metal lorry tank is generally an ellipse with an oval cross section and a horizontally elongated shape in order to improve the stability of the center of gravity, but conventional FRP lorry tanks do not have a floor shape. In most cases, it is formed into a horizontally oblong circular shape with a circular cross section in order to maintain a high cross-section and mechanical strength.

This is because when making an elliptical tank using FRP, the wall thickness has to be considerably thicker than a circular tank in order to maintain strength, which increases the weight and requires more materials, making it less economical. It's for a reason.

However, since oval-shaped tank cars have superior stability, there has been a strong demand for oval-shaped tanks even for FRP lorry tanks.

The purpose of the present invention is to meet the above-mentioned conventional demands, and to provide a method for manufacturing an elliptical FRP lorry tank that can satisfy the required strength without particularly increasing the wall thickness. be.

In the following, the present invention will be explained by way of an embodiment with reference to the drawings.

First, four short frames A1, A2, of a predetermined short length,
A3, A4, and four vertical frames B1, B2, which are slightly longer than the short frames A1 to A4. B3. B4 and four long horizontal frames C1, C2, C3°C4 of equal length are prepared, and the two vertical frames B1. B2 or B3. B4 and two short frames A1.
Two vertical rectangular frames 1 with A2 or A3゜A4,
Form/make 2.

Next, each corresponding vertex 1a, 1 of the two rectangular frames 1, 2
bt1ctld, 2a, 2b.

Between 2c and 2a, the short frames A1 to A4 and the vertical frames B1 to B
Horizontal frames Ci, C2, C3, and C4 longer than 4 are arranged, respectively, and each end of each of the horizontal frames C1 to C4 is fixed to each vertex.

That is, CIA for 1a. ciB for 2a, C2A for ib, C2B for 2b, C4A for 1c, C for 2c
C3A for 4Bl1d.

2d, each C3B is fixed to form a rectangular parallelepiped-shaped horizontally elongated frame body 3 (see FIG. 1).

In addition, short frames A1 to A4 vertical frames B1 to B4 and horizontal frames C1 to C
4 is of a predetermined size that can be placed on a tank truck T, which will be described later, when the frame body 3 is formed.

In addition, the material of the frame materials such as short frames A1 to A4 in this example are all metal, and the frame materials are strip-shaped, channel-shaped, and angle-shaped, and all of these are fixed by bolting or This is done by common fixing means such as welding.

Next, vertical frames Bl, 82 are placed on the upper and lower sides of the framework body 3.
Reinforcement short frames Di and D2 connecting between the two, and reinforcing short frames D3 and D4 connecting the vertical frames B3 and B4 are arranged, and each vertical frame B
1 to B4.

Similarly, reinforcing horizontal frames E1, E2, E3, and E4 connecting vertical frames Bl and B3 and between vertical frames B2 and B4 are arranged, and the reinforced horizontal frames E1 to E4 are connected to each vertical frame B1 to B4. sticks to.

After that, between each reinforcing horizontal frame El, E2, E3, and E4 on the upper side and lower side arranged in the frame body 3 (and four vertically oriented reinforcing vertical frames F1, F2, F3 at each predetermined interval)゜F4, F
Fix 5, F6, F7, and F8.

The reinforcing vertical frames F2, F3, F6, and F7 are long enough to reach the upper and lower horizontal frames C1, C2, C3, and C4, and are also fixed to the horizontal frames C1 to C4.

Thus, the junction points 4a, 4b, 4c, 4d, 4e, 4f, 4g between the vertical frames B1 to B4 and the reinforcing horizontal frames E1 to E4.

4h, and reinforcement horizontal frames F1 to F8, and reinforcement horizontal frames E1 to E.
Each junction point 5a, 5b, 5c, 5d with 4...5
m, 5n, 5o, 5p, vertically oriented arcuate frames G1, G2 . G3. G4゜G5. G6
, Gl, G8, G9, G10, Gl 1
゜Fix each G12.

Further, short reinforcing frames D5 to D12 are fixed between the joint points of the reinforcing horizontal frames E1 to E4 and the reinforcing vertical frames F1 to F8.

That is, junction points 5a, 5i, 5c, 5k, 5e +
5 rn % 5 g t 5015 b + 5
Reinforcement short frames D5 to D12 are fixed between J s 5 d +51.5f, 5n, 5h, and sp, respectively (see FIG. 3).

Next, quadrilaterals 5a, 5b, 5d, 5i, 5c, and 5d are surrounded by a reinforcing vertical frame and a negative set of reinforcing horizontal frames.

51.5, 5e, 5f, 5n, 5m, and 5g.

FRP partition plates H1゜H2 are installed in sh, 5p, and 5o.
, H3, and H4 are installed (see Fig. 4).

Note that the partition plates H1 to H4 can be omitted.

Next, FRP veneers 1 are sequentially bonded between the arcuate frames G1 to G12 from the inside of the framework body 3 along each of the arcuate frames G1 to G12.

Then, a heat insulating material J such as polyurethane or polystyrene is pasted on the bonded veneer 1, and an FRP veneer K is further bonded thereon from the outside of the arcuate frames G1 to G6.

That is, each of the arcuate frames G1 to G12 is formed in a sandwich structure in which a heat insulating material J is interposed between two FRP veneers I.

Similarly, curved surfaces of a sandwich structure are formed for each of the arcuate frames G7 to G12 on the opposite side.

Then, between the upper reinforcing horizontal frames E2 and E4, and between the lower reinforcing horizontal frames E1. between E3 and the reinforced short frame D1. D2 and arcuate frame G
1. Sharp portion L1 surrounded by G7 and reinforcing short frame D3
, D4 and the other sharp portion L surrounded by the arcuate frames G6 and G12
The elliptical lorry tank 10 thus formed has a side surface with a sandwich inch structure (see FIG. 6).The elliptical lorry tank 10 thus formed has a liquid supply port (not shown) that can be opened and closed and a liquid discharge port (not shown) that can be opened and closed. After this is formed, it is fixed to the tank truck T.

The above embodiment can be modified as follows.

That is, (a) short frames A1 to A in the framework body 3 of this example
4 and the vertical frames B1 to B4 are of different lengths, but the vertical frames B1 to B4 are of the same length as the short frames A1 to A4, (b) Sharp part L1 of the lorry tank 10 ．． L2 is not limited to a flat shape, but must be formed into a curved shape that protrudes outward.
(2) The end portions of the horizontal and vertical frames shall be appropriately covered with FRP boards, etc. (2) The number of frame materials to form the frame body shall be determined by the number of lorries to be formed.
Depending on the size of the tank 10, increase or decrease it so that the necessary strength can be secured. It is possible to join the FRP veneer from both sides of the frame so that it looks like this.

As explained above, when forming a lorry tank for storing liquid or gas in a tank car, the present invention uses eight short frames and four frames that are longer than the short frames and have substantially equal lengths.
A horizontally long rectangular parallelepiped-shaped framework is formed by framing the horizontal frame of the book, and then, in the longitudinal middle part of this framework, both longitudinal sides have a cross-section having an arc-shaped curved surface that protrudes outward. In order to form an oval tank, an appropriate number of reinforcing frames and arcuate frames are arranged and fixed to the frame body, and an FRP plate is glued between each frame body in the middle part of the frame body. This is a method of manufacturing a lorry tank in which a tank with an oval cross section is formed in the middle part of the tank.

Therefore, according to the present invention, an elliptical lorry tank with a constant wall thickness can be obtained without particularly increasing the wall thickness.

Further, since the lorry tank of the present invention is formed in the middle part of the rectangular parallelepiped-shaped frame body, it has the advantage of being able to have high impact resistance and mechanical strength.

[Brief explanation of the drawing]

The drawings show the manufacturing process in an embodiment of the method of the present invention, in which Fig. 1 is an explanatory diagram showing an aspect of forming a framework with vertical frames and horizontal frames, and Fig. Furthermore, FIG. 3 is an explanatory diagram showing a state in which a reinforcing frame is glued, and FIG.
The figure is a schematic explanatory diagram showing the state in which the partition plate is attached to the frame body,
Fig. 5 is an explanatory diagram showing the state in which the side part of the frame body is covered with an FRP plate, etc., Fig. 6 is a perspective view of the formed lorry tank, and Fig. 7 is taken along the line ■-■ in Fig. 6. It is an explanatory view showing a cross-sectional state. AI, A2, A3, A4...Short frame, BL
, B2゜B3 , B4... Vertical frame, CI, C2,
C3, C4...Horizontal frame, DI, D2. D3-D1
0. Dll. DI2...Reinforced short frame, El, B2. B3. B
4゜B5, B6, B7, B8...
Reinforced horizontal frame, Fl. F2, B3, B4, B5, B6,
B7, B8... Reinforced vertical frame, G1. G2. G
3~GI O, G11. G12...Arc-shaped frame, I, K...Single plate,
Ll, L2... sharp part, 3... tank car, 10... lorry tank.

Claims (1)

[Claims] 1. When forming a lorry tank for storing liquid or gas in a tank car, eight short frames and four horizontal frames that are longer than the short frames and have approximately the same length are used to form a horizontally long tank. A rectangular parallelepiped framework is formed, and then a tank with an elliptical cross section is formed in the longitudinally intermediate portion of this framework, with both longitudinal sides protruding outward and having a curved surface with an arcuate cross section. A suitable number of frames and arc-shaped frames are arranged and fixed to the frame body, a reinforced plastic plate is glued between each frame body in the middle part of the frame body, and a tank with an oval cross section is installed in the middle part of the frame body. A method for manufacturing a reinforced plastic lorry tank, characterized by forming a lorry tank.