JPH0371609A - Manufacture of tank - Google Patents

Abstract

PURPOSE:To make it possible to remove the defective welding on the overlapped part of corrugated heat radiating plate and the difficulty in welding work by a method wherein the wall member of a tank is formed in such a manner that both ends of the corrugated heat radiating plates are project in the same dimensions from the upper and the lower frame members. CONSTITUTION:Heat radiating fins 12 are arranged at regular intervals B inside both end parts 13a and 13b of the corrugated heat radiating plate 13 to the extent of size C (C>B). The upper and the lower frame members 14 and 15 are junctioned by welding along the upper and the lower side parts 13c and 13d of the corrugated heat radiating plate 13, and both end parts 13a and 13b of the corrugated heat radiating plate are projected to the extent of equal distance D(U<C). Then, the upper and the lower frame members 14 and 15 are bent in almost U-shape, both end parts 14a and 14b, and 15a and 15b are welded in a butt-together state, and both end parts 13a and 13b of the corrugated heat radiating plate are welded in an overlapped state. As a result, the defective welding due to the variation of position of welding edge face and the difficulty of welding operation due to the inclination of welding line to the side of the heat radiating tin 12 can be prevented.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a method for manufacturing a tank using a tank wall member formed by joining an upper frame member and a lower frame member to a corrugated heat sink. .

(Prior Art) Conventionally, as a method for manufacturing tanks used for oil-immersed transformers and the like, there is a method disclosed in Japanese Patent Publication No. 63-64273, for example.

That is, this thing is shown in the plan view of FIG. 5(a) and the same figure (b).
), first, the upper frame member 3 is welded to the upper side 2a of the corrugated heat sink 2 in which the radiation fins 1 are formed at regular intervals A, and the lower frame member 4 is welded to the lower side 2b. A tank wall member 5 is formed. Then, this tank wall member 5 is bent so that the radiation fins l are on the outside, and both ends 2C and 2d of the corrugated heat radiation plate 2 are overlapped and welded, and the upper frame member 3 and the lower frame member 4 are welded together. Both ends 3a, 3b and 4
A and 4b are butted and welded to form a substantially rectangular cylindrical shape as a whole to form the wall portion of the tank. In this case, as shown in FIG. 6, when welding the upper frame member 3 and the lower frame member 4 to the upper and lower sides 2a and 2b of the corrugated heat sink 2, the right end 2C of the corrugated heat sink 2 is Frame member 3
and the right end portions 3a and 4a of the lower frame member 4, and the left end portion 2d is formed to protrude from the left end portions 3b and 4b of the upper frame member 3 and the lower frame member 4. . Therefore, when the above-mentioned welding is performed after bending the tank wall member 5, the welding lines can be aligned in a straight line as shown in Fig. 6, thereby making it possible to easily automate the welding. .

(Problem to be Solved by the Invention) However, in the above method, the tank wall member 5
Although automatic welding becomes easier in order to align the welding lines when welding the corrugated heat sink 2 and the upper and lower frame members 3 and 4 after bending, the following problems occur in the manufacturing process. There was a risk.

That is, in general, after each welding process is carried out, a welding condition check is performed, and if the welding condition does not meet the specifications, repair work such as repair welding is performed. may be replaced. On the other hand, even with the corrugated heat sink 2, since a welding process is performed to seal the upper and lower parts when forming the heat sink fins 1, it is necessary to check the welding condition.

Therefore, at that time, if the corrugated heat sink 2 is overlooked and sent to the next process with the vertical direction reversed, the weld line of the tank wall member 5 will be at the position of the end 2d of the corrugated heat sink 2 in FIG. This results in a large deviation from the original weld line position. That is, originally in FIG. 6, the radiation fin 1.
The overlapping part of the corrugated heat sinks 2 could be welded approximately in the center of the space between 1 and 2, but the welding work was skewed toward the radiator fins 1 on the left in the figure, and the radiator fins 7 were in the way of welding. This results in problems that make work difficult.

In addition, even in the case of the tank wall member 5, the vertical direction may be reversed when checking the welding state, and such a state of vertical reversal is overlooked and the material is bent into a substantially rectangular tube shape in the next process. When the ends of the corrugated heat sinks 2 are overlapped,
The end face of the end portion 2C faces the left side in the figure, and the end portion 2d is inserted into the inside from the left side, and the vertical direction is reversed from the normal state. However, in this state, since the welding line is in the same position as in the normal state, there is a risk that the welding line will be erroneously sent to the next process and the end portion 2C will be welded in that state. The torch for welding the end portion 2C is placed so that the end surface of the end portion 2c faces to the right in the figure, so if you mistakenly weld with the end surface of the end portion 2C facing to the left in the figure, , resulting in poor welding.

Further, in each of the above cases, the tank wall is formed by one tank wall member 5, but when forming the tank wall by using a plurality of members, the corrugated heat sink 2 or the tank wall member 5 as described above may be used. If the vertical swapping of the corrugated heat sinks 2 is overlooked, the protruding ends of the corrugated heat sinks 2 or the welding line-aligned parts will face each other, making welding practically impossible and causing problems such as reversal. Problems occur that require troublesome work.

The present invention has been made in view of the above circumstances, and its purpose is to check the welding condition of corrugated heat sinks or tank wall members when they are sent to the next process while being placed vertically in the same direction. However, it is an object of the present invention to provide a method for manufacturing a tank in which the overlapping portions of both ends of a corrugated heat sink can be welded without any trouble, thereby improving workability.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides one or more tank wall members by joining an upper frame member and a lower frame member to the upper and lower sides of a corrugated heat sink having a plurality of heat sinks at predetermined intervals. After bending this tank wall member, the ends of the corrugated heat sink are overlapped and joined, and the ends of the upper frame member and the lower frame part are joined in a butted manner to form a tank. The method is characterized in that, when forming the tank wall member, both ends of the corrugated heat sink are set to protrude from the upper frame member and the lower frame member by the same size, respectively.

Further, the upper frame member and the lower frame member may have the same shape.

(Function) According to the tank manufacturing method of the present invention, when forming the tank wall member, both ends of the corrugated heat sink are set to protrude by the same size from the upper frame member and the lower frame member, respectively. ,
If a tank wall member is formed with the vertical direction of the corrugated heat sink reversed, or if the vertical direction remains reversed when checking the welding condition of the tank wall member, the tank wall member cannot be replaced. When joining the ends of the corrugated heat sink after bending, the positions of the abutted portions of the upper frame member and the lower frame member can always be maintained at a constant distance, so welding work during joining can be performed without any trouble.

Moreover, if the upper frame member and the lower frame member are made to have the same shape, there is no need to distinguish between the upper and lower directions when forming the tank wall member, and work efficiency is improved.

(Example) Hereinafter, an example in which the present invention is applied to a method of manufacturing a tank for an oil-immersed transformer will be described with reference to FIGS. 1 to 4.

First, in FIG. 4, a tank wall 11 constituting a tank is shown.
1 has a substantially rectangular cylindrical shape with four arcuate corners, and has radiation fins 12 formed at predetermined intervals B on the outer peripheral surface of the corrugated heat sink 13, and an upper frame member 14 joined to the upper and lower parts thereof. ．． It is composed of a lower frame member 15. A lid member is attached to the upper part of the tank wall 11 via a gasket (not shown), and a bottom plate member (not shown) is attached to the lower part, thereby forming a tank. in this case,
The tank wall 11 is constructed by using a plurality of tank wall members 16, for example two, as shown in FIGS. 1 and 32. After bending each tank wall member 16 into a substantially U-shape, It is formed by joining the ends by welding as described below.

Next, a method for forming the tank wall member 16 will be described in detail.

The corrugated heat dissipation plate 13 is made by bending a thin sheet-like W4 plate into a corrugated shape, and then joining its upper and lower parts by welding to form a plurality of heat dissipation fins 12. In this case, Figure 1 (
As shown in a), the radiation fins 12 are arranged at a predetermined distance B from each other, and are placed inward by a dimension C (CAB) from both ends 13a and -3b of the corrugated heat radiation plate 13. . In other words, since the corrugated heat sink 13 is symmetrically formed vertically and horizontally, the welding condition can be checked after welding the heat sink fins 12, and even if the welding condition is checked and sent to the next process with the top and bottom directions reversed, it is possible to distinguish between the top and bottom. does not require The upper frame member 14 and the lower frame member 15 are of the same shape, and have an oval cross section as shown in FIG. 1(b). These upper and lower frame members 14 and 15 are joined by welding along the upper and lower sides 13c and 13d of the corrugated heat sink 13. In this case, the upper and lower frame members 14 and 15 are positioned so that both ends 13a and 13b of the corrugated heat sink 13 protrude by an equal distance D (DEC), that is, at the center of the upper and lower side parts 13c and 13d, respectively. and are joined together. Therefore, in this case, there is no distinction between the upper and lower sides of the tank wall member 16, so that even if the tank wall member 16 is sent to the next process with the upper and lower directions reversed during the welding condition check, no problems will occur.

Thereafter, the two tank wall members 16 formed as shown in FIG. 3 are bent into a substantially U-shape and joined by welding at both ends to form the tank wall 16 as shown in FIG.
1. As shown in the cross-sectional view along the upper and lower sides 13c and 13d of the corrugated heat sink 13 in FIG.
The upper and lower frame members 14.15 have both ends 14a and 14b.
Then, 15a and 15b are welded butt-like, respectively.
The corrugated heat sink 13 has both ends 13a and 13b overlapped (the overlapping margin is 2D), and the end 13b
Welded at In this case, the position of the welding line is shifted from the welding line of the upper and lower frame members 14 and 15 by a certain amount, but even if the vertical direction is reversed as described above, the waveform heat dissipation on the right side as shown in the figure End 13b of plate 13
If they are stacked so that the is on the outside, there will be no change from the normal state. Therefore, problems such as a change in the position of the end face of the end to be welded, resulting in defective welding, or a welding line being biased toward one of the radiation fins 12, which makes welding work difficult, do not occur.

According to this embodiment, the tank wall member 16 is formed by making both ends 13a and 13b of the corrugated heat sink 13 protrude from the ends of the upper and lower frame members 14 and 15 by the same amount. Therefore, the corrugated heat sink 13 is connected to the heat sink fin 1.
Even if an error occurs such as reversing the vertical direction and sending it to the next process when checking the welding state after forming 2, there will be no distinction between the vertical direction. Therefore, during the subsequent welding of the end of the tank wall member 16, problems such as poor welding of the overlapping portions of the corrugated heat sinks 13 and difficulty in welding work are eliminated, and workability is improved.

Furthermore, since the upper frame member 14 and the lower frame member 5 are made to have the same shape, there is no distinction between the upper and lower parts of the tank wall member 16, so that the same effect as described above can be obtained when the end of the tank wall member 16 is welded later. At the same time, the number of required parts can be reduced.

In the above embodiment, the intervals between the heat dissipating fins 12 are equal, but the distance between the heat dissipating fins 12 is not limited to this, and different dimensions may be used.

Further, in the above embodiment, the tank wall member 16 is
Although the case where the tank wall portion 1 is manufactured using one sheet has been described, the case is not limited to this, and the case where one sheet or three or more sheets are used is also applicable.

Furthermore, in the above embodiment, the upper frame member 14 and the lower frame member 1
Although the case where 5 of the same shape is used has been described, the present invention is not limited to this, and the present invention can also be applied to a case where 5 of different shapes are used.

[Effects of the Invention] According to the tank manufacturing method according to claim 1, the tank wall member is formed so that both ends of the corrugated heat sink protrude from the upper and lower frame members by the same size, so that the tank wall member is After bending, the portions where the corrugated heat sinks are overlapped are set to have equal dimensions centered on the abutting positions of the upper and lower frame members. As a result, when forming the tank wall part I4, the corrugated heat sink is
If you mistakenly join the upper and lower frame members while checking the welding condition while the upper and lower directions are reversed, even if the stacking of the corrugated heat sinks is reversed, the welding position will always be the upper, upper and lower sides. Since the welding position can be set at an equal distance from the butt position of the lower frame members, the conventional problem of the welding position being near the radiation fin, which makes welding work difficult, is eliminated.In other words, the formation of the tank wall member At times, work can be carried out without having to distinguish between the upper and lower directions of the corrugated heat sink, and this has the excellent effect of improving work efficiency.

According to the method for manufacturing a tank according to claim 2, since the upper frame member and the lower frame member are of the same shape,
In addition to the above-mentioned effects, since there is no vertical distinction between the tank wall members, there is an excellent effect that workability is further improved.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention, and FIG. 1 (
a) and (b) are front and side views of the tank wall member, Figure 2 is an enlarged sectional view of the joint part of the tank wall member, Figure 3 is an external perspective view of the tank wall member, and Figure 4 is the tank wall. FIG. 5 and FIG. 6 are perspective views of the external appearance of the conventional example.
2 and a diagram corresponding to FIG. 2. In the drawing, 11 is a tank wall, 12 is a heat sink, 13 is a corrugated heat sink, 13a and 13b are upper and lower sides, 13
14 is an upper frame member, 15 is a lower frame member, and 16 is a tank wall member.

Claims (2)

[Claims] 1. After joining an upper frame member and a lower frame member to the upper and lower sides of a corrugated heat sink having a plurality of heat dissipating fins at predetermined intervals to form one or more tank wall members, and bending this tank wall member, In the method of manufacturing a tank by joining the ends of the corrugated heat sink in an overlapping manner and joining the ends of the upper frame member and the lower frame member in a butt manner, when forming the tank wall member. A method of manufacturing a tank, characterized in that both ends of the corrugated heat sink are set to protrude from the upper frame member and the lower frame member by the same size, respectively. 2. 2. The method of manufacturing a tank according to claim 1, wherein the upper frame member and the lower frame member have the same shape.