JP2000018504A - Slide spacer and device for line up of pipes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve welding workability of a slide spacer and stabilize the welded quality in a device for line up of pipes regulating positional deviation of parallelly adjacent pipes. SOLUTION: Parallelly adjacent pipes 3 are connected to each other through a slide spacer 11, and connection parts 12 and bent plate parts 13 are integrally formed by the slide spacer 11. The slide spacer 11 is welded to the adjacent pipes 3 to be point-symmetrical respectively. A welding bevel end is formed between the connection part 12 and the pipe 3 in a state that the bent plate part 13 having a curved face engaged with the external face of the pipe 3 is positioned on the pipe 3 and further, a fitting groove 9 to which the connection part 12 of the slide spacer 11 adjacently positioned between the connection part 12 and the pipe 3 can be fitted, is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide spacer for aligning and connecting a large number of rows of pipes such as a heat exchanger and a pipe aligning apparatus.

[0002]

2. Description of the Related Art In a heat exchanger such as a boiler, adjacent parallel heat transfer pipes are connected by a pipe alignment device. The pipe alignment device has a structure in which a slide spacer is fixed to the heat transfer pipe and the slide spacers are connected to each other. Since the adjacent heat transfer pipes have different amounts of thermal expansion, the heat transfer pipe can expand and contract freely. In this way, the slide spacers can slide freely.

Referring to FIG. 4, a description will be given of a heat exchanger of a boiler in which a piping alignment device is used.

[0004] The header 1 and the header 2 are communicated with each other by a heat transfer pipe 3, and a heat receiving portion 3 a,
The heat exchange unit 4 and the heat exchange unit 5 are formed by bending and bending 3b.

The adjacent pipes of the heat exchanging section 4 and the heat exchanging section 5 are connected by an upper and lower two-stage pipe aligning device 6, and are maintained parallel and at a predetermined interval.

Referring to FIGS. 5 and 6, a conventional pipe aligning device 6 is shown.
Will be described.

The piping alignment device 6 comprises a rod-shaped slide spacer 8 having a V-shaped groove 7 formed on one side, and the slide spacer 8 is attached to the heat transfer pipe 3 by welding in a point-symmetrical manner about the axis. A fitting groove 9 formed by the V-shaped groove 7 is formed between the slide spacer 8 and the heat transfer pipe 3.

The adjacent slide spacers 8 can be slidably fitted in the fitting grooves 9, and the adjacent heat transfer pipes 3 are arranged at predetermined intervals by fitting the slide spacers 8 together. It is to be connected.

[0009]

In the conventional pipe aligning apparatus described above, the slide spacer 8 is inclined with respect to the heat transfer pipe 3 to form a groove 10 necessary for welding. To keep the inclination of the slide spacer 8 constant, a welding jig is required, and the work becomes complicated.
The workability is poor and the skill level affects the mounting accuracy. In addition, two or more pipe aligners are required in a line to regulate the position shift and posture of the heat transfer pipe 3, and there has been a problem that alignment is more difficult.

The present invention has been made in view of the above circumstances, and aims at improving the mounting accuracy of a slide spacer and improving workability.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a slide spacer for connecting pipes adjacent to each other in parallel is provided with a connecting portion which can be connected to the adjacent slide spacer and a pipe for positioning the connecting portion with respect to the pipe. The present invention relates to a slide spacer composed of a curved plate portion that can be engaged with a pipe spacer, and also relates to a slide spacer in which a connecting portion and a curved plate portion are integrally molded by a forging manufacturing method, and also to a pipe alignment device that connects adjacent pipes in parallel. In this case, a slide spacer in which the connecting portion and the curved plate portion are integrated is welded to adjacent pipes so as to be symmetrical with respect to each other, and the curved plate portion has a curved surface which engages with the outer surface of the pipe. A groove for welding is formed between the connecting part and the pipe in a state where the pipe is aligned with the pipe, and a connecting part of the adjacent slide spacer between the connecting part and the pipe is fittable. Distribution where grooves are formed In connection with the alignment device, the posture of the slide spacer with respect to the piping is determined by engaging the curved surface of the curved plate portion with the curved surface of the piping, so that welding work of the curved plate portion can be easily performed, and further, the connecting portion is welded by the curved plate portion. Is fixed to the pipe, and welding of the connection portion can be performed in a stable state.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3, the same components as those shown in FIGS. 5 to 6 are denoted by the same reference numerals.

The slide spacer 11 has a rod-like connecting portion 12.
And a curved plate portion 13 engaging with the outer surface of the heat transfer pipe 3. The connecting portion 12 has the same shape as a conventional slide spacer 8, and the curved plate portion 13 has a part of a cylinder removed. The curvature of the inner surface is the same as the curvature of the outer surface of the curved plate portion 13. Further, the connecting portion 12 and the curved plate portion 1
The relationship with 3 is that the fitting groove 9 is formed in a state where the curved plate portion 13 is fitted to the heat transfer pipe 3 and a predetermined groove 10 is formed between the curved groove 13 and the heat transfer pipe 3. .

When the slide spacer 11 is welded to the heat transfer pipe 3, the slide spacer 11
Is determined, and the curved plate portion 13 is positioned at the mounting position. Since the inner curved surface of the curved plate portion 13 and the outer curved surface of the heat transfer pipe 3 are the same curved surface, the curved plate portion 13
Determines the posture. The welding portion 14 is welded between the end face of the curved plate portion 13 and the heat transfer pipe 3, and then the groove 1 formed between the connecting portion 12 and the heat transfer pipe 3 is formed.
The welding of the welding portion 15 is performed to 0.

As described above, the connecting portion 12 and the curved plate portion 13 are integral with each other, and the curved plate portion 13 is aligned with the heat transfer pipe 3 so that the connection portion 12 and the heat transfer pipe 3 can be optimally connected. And the heat transfer pipe 3 of the curved plate portion 13 can be achieved.
The welding of the curved plate 13 does not change the positional relationship between the connecting portion 12 and the heat transfer pipe 3 even during the welding of the connecting portion 12. Therefore, the welding operation can be performed efficiently, and high-quality welding can be performed regardless of the skill level.

The connecting portion 12 and the curved plate portion 13 may be manufactured integrally by a forging method or may be manufactured by machining, or the connecting portion 12 and the curved plate portion 13 May be manufactured separately and integrated by welding or the like.

The slide spacers 11 are mounted point-symmetrically with respect to the heat transfer pipes 3, and the adjacent slide spacers 11 are fitted into the fitting grooves 9.
Are connected at predetermined intervals, as in the related art. or,
Since the curved plate portion 13 is located on the opposite side when the slide spacer 11 is opposed to the curved spacer portion 13, it does not hinder the fitting between the connecting portion 12 and the fitting groove 9.

[0019]

As described above, according to the present invention, the position and posture of the connecting portion are mechanically determined by positioning the curved plate portion at a predetermined position, so that the workability of mounting the slide spacer is improved. In addition, the present invention exerts an excellent effect that the welding quality can be stabilized and the mounting failure can be prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing the embodiment of the present invention.

FIG. 3 is a perspective view of a slide spacer used in the embodiment.

FIG. 4 is an explanatory view schematically showing a heat exchanger in which the present invention is implemented.

5 shows a conventional example, and is a view as seen from the direction of arrow A in FIG.

FIG. 6 is a side view of a conventional example.

[Explanation of symbols]

 3 heat transfer pipe 9 fitting groove 11 slide spacer 12 connecting part 13 curved plate part

Claims (3)

[Claims] A slide spacer for connecting adjacent pipes in parallel is formed from a connecting portion that can be connected to the adjacent slide spacer and a curved plate portion that can be engaged with the pipe so as to position the connecting portion with respect to the pipe. A slide spacer characterized by being constituted. 2. The slide spacer according to claim 1, wherein the connecting portion and the curved plate portion are integrally formed by a forging manufacturing method. 3. A pipe aligning device for connecting adjacent pipes in parallel with each other, wherein a slide spacer in which a connecting portion and a curved plate portion are integrated is welded to adjacent pipes so as to be point-symmetrical with each other, and the curved plate is welded. The part has a curved surface that engages with the outer surface of the pipe, and a groove for welding is formed between the connection part and the pipe in a state where the curved plate part is aligned with the pipe, and the connection part and the pipe are connected to each other. A fitting groove in which a connecting portion of a slide spacer adjacent to the fitting portion is fitted.