JPH05643Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tube outlet structure of a boiler panel.

[Prior Art] Generally, the furnace wall of a boiler is constructed of a panel in which a plurality of tubes arranged in parallel are connected by fins.

At the lower end of this type of panel, there is a pipe outlet structure in which a pipe protrudes outward from the surface of the panel in order to supply and discharge water and steam to and from the panel.

Such a structure of the pipe take-out part of the panel exists, for example, at the lower end of the side wall of the sub-side wall located between the furnace and the rear heat transfer section. A plurality of L-shaped tubes 4 are provided, each having a vertical portion 1, a bent portion 2, and a horizontal portion 3 guided to a header etc., which extend vertically with a width approximately equal to the outer diameter of the tube 4, and A fin 6 is provided in which a plurality of curved notches 5 are formed in the width direction, the lower end of which matches the bent portion 2 of the tube 4, and each notch 5 of the fin 6 is provided with a vertical portion 1 and a bent portion 2 of the tube 4. It was formed by fitting the fins 6 and welding the tube 4 together.

Note that 7 is a casing welded to the lower end of the fin 6.

[Problems to be solved by the invention] However, the structure of the tube take-out part of the conventional boiler panel described above has the following drawbacks because the L-shaped tube 4 is directly welded to the fin 6. It was hot.

It takes a lot of effort and time to weld the lower end portion of the notch 5 of the fin 6 and the bent portion 2 of the tube 4 in a curved shape.

Moreover, there is a tube 4 in the curved part to be welded.
Edge part a is not welded because there is an edge part a on the lower end of the surface on the horizontal part 3 side that cannot be welded, or even if welded, a cavity is formed inside and the welded part easily peels off. Since the welding part was left on the opposite side and only the opposite side was welded, the strength of this part was extremely low, thermal stress was likely to concentrate, and cracks were likely to occur in the welded part on the opposite side of edge part a. Therefore, the welded portion on the opposite side of edge portion a had to be repeatedly welded for repair.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a tube outlet structure for a boiler panel that does not require troublesome welding and has high strength.

[Means for Solving the Problems] The present invention connects a plurality of pipes arranged side by side with fins to form a panel, and includes an L-shaped pipe elbow part having a straight part, a bent part, and a take-out part; A finned elbow is formed by integrally molding rectangular fins extending in a plane from the outside of the straight part and the outer periphery of the bent part of the pipe elbow, and the straight part of the pipe elbow part and the fins of the finned elbow are attached to the end of the panel, respectively. This invention relates to a structure of a pipe take-out part of a boiler panel, characterized in that the pipe and the fin are welded to each other, and the take-out pipe is welded to the pipe elbow part take-out part of an elbow with fins.

[Function] Since a finned elbow in which the pipe elbow portion and fins are integrally molded is used, troublesome curved welding is not necessary and high strength can be obtained.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIGS. 1 and 2 show an embodiment of the present invention.

A plurality of straight tubes 8 extending in the vertical direction are arranged in parallel at regular intervals, and a strip-shaped fin 9 is installed between the tubes 8.
are welded to form the panel 10.

Straight section 11a, bent section 11b and take-out section 1
1c, an L-shaped pipe elbow part 11 having a straight part 11a outside the pipe elbow part 11, and a bent part 11b of the pipe elbow part 11.
A finned elbow 13 having a rectangular finned portion 12 extending planarly from the outer periphery is integrally molded using a mold or the like, and a straight portion of the tube elbow portion 11 of the finned elbow 13 is attached to the lower end of the tube 8 of the panel 10. 11a opening is welded, and at the same time, the upper end of the fin portion 12 of the finned elbow 13 is welded to the lower end of the fin 9 of the panel 10, and the side surfaces of the fin portions 12 of adjacent finned elbows 13 are welded, and finally the finned Elbow 1
A horizontal extraction pipe 14 is welded to the opening of the extraction portion 11c of the pipe elbow portion 11 of No. 3.

In addition, 15 is the fin portion 12 of the finned elbow 13.
This is a rounded portion formed at the boundary between the pipe elbow portion 11 and the pipe elbow portion 11.

In the present invention, the finned elbow 13, which is formed by integrally molding the pipe elbow part 11 and the fin part 12, is used to form the pipe take-out part of the panel 10. Therefore, there is no complicated curved welding part, and manufacturing is easy. be.

In addition, since the integrally molded finned elbow 13 has high strength, the manufactured tube take-out portion has sufficient strength, thereby preventing the occurrence of cracks, etc., and eliminating the need for maintenance such as repair.

It should be noted that the structure of the tube take-out portion of the boiler panel of the present invention is not limited to the above-mentioned embodiments, and each finned elbow may be provided with a plurality of tube elbow portions at the same time. Of course, various changes can be made without departing from the gist of the present invention.

[Effects of the invention] As explained above, according to the structure of the pipe take-out part of the boiler panel of the invention, since the finned elbow formed by integral molding is used, troublesome curved welding is eliminated. It can produce various excellent effects such as easy manufacture, high strength, prevention of cracks, etc., and no need for maintenance.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is a view taken in the direction of the - arrow in Fig. 1, Fig. 3 is an explanatory diagram of the conventional example, and Fig. 4 is a view taken in the - arrow direction of Fig. 3. be. In the figure, 8 is a tube, 9 is a fin, 10 is a panel, and 11
11a is a straight part, 11b is a bent part, 11c is a take-out part, 12 is a fin part, 13 is an elbow with fins, 14 is a take-out pipe, and 15 is a rounded part.

Claims (1)

[Scope of utility model registration request] A panel is formed by connecting a plurality of pipes arranged side by side with fins, and includes an L-shaped pipe elbow part having a straight part, a bent part, and a take-out part, and the outside of the straight part and the outer periphery of the bent part of the pipe elbow part. A finned elbow is formed by integrally molding a rectangular fin extending in a planar shape from the finned elbow, and the straight part of the pipe elbow part of the finned elbow and the fin are welded to the pipe and fin at the end of the panel, respectively. A pipe take-out structure of a boiler panel, characterized in that a take-out pipe is welded to the pipe elbow take-out part.