KR20160020940A - Radiant tube - Google Patents

Abstract

Provided is a radiant tube (600) capable of preventing damage to a tube and improving durability by effectively responding to expansion and contraction that occur due to temperature variation. The radiant tube (600) of the present invention comprises: a plurality of straight pipe units (401, 402, 403) which are equidistantly arranged; a pipe (400) consisting of a plurality of curved pipe units (301, 302) which connect both ends of the straight pipe units to make the plurality of straight pipe units be connected; a burner accommodation unit (310) which is installed in parallel with the straight pipe units to be connected to one end of the pipe; a support rod (320) configured to be protruding in the other end of the pipe, which faces the burner accommodation unit, in parallel with the plurality of straight pipe units; a first fixation block (510) which is supported by the outer surface of the burner accommodation unit; a second fixation block (520) which the support rod is inserted into and supported by; and a buffer rail (522) which is formed between the support rod and the second fixation block to make the support rod move inside the second fixation block.

Description

Radiant tube {Radiant tube}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiant tube, and more particularly, to a radiant tube structure capable of effectively preventing a tube from being damaged and durability by effectively coping with other expansion and deformation of the radiant tube .

In general, iron plates used in household appliances or automobiles are heated in a combustion apparatus equipped with a radiant tube burner for desired strength and crystal structure.

The heat source supplied to the combustion apparatus is obtained by mixing a coke oven gas (hereinafter referred to as COG gas) with a combustion gas in a burner of a combustion apparatus and igniting it. An example of a radiant tube constituted in the combustion apparatus as described above is disclosed in Korean Patent Publication No. 2014-0088673.

As shown in FIG. 1, the conventional radiant tube 500 is configured to form a Φ-shaped tube body 250 by using an inconel metal mainly composed of nickel and chromium.

One end of the Φ-shaped tube 250 is fixed to the blocking plate 300, and a burner 350 is installed in the tube.

The Φ-shaped tubular bodies 250 are folded at regular intervals on the same plane and are disposed adjacent to each other. Plate-shaped ribs 260 are welded and fixed integrally to the outer surfaces of the adjacent tubular bodies .

The spiral ribs 260 are made of a thin plate using the same metal material as the tubular body, that is, a metal material having a high thermal conductivity such as inconel copper, and the plate is structured so as to be spirally wound around the tubular outer surface. Between the tubular body 250 and the tubular body 250 provided with the ribs 260, a reinforcing plate 270 for connecting the tubular body and the tubular body to each other is provided.

The radiant tube 500 having the above-described structure is advantageous in that it can be cracked or distorted due to thermal deformation even when it is used for a long time or exposed to a high temperature, the thermal conductivity can be improved, The temperature of the tube through which the high-temperature COG combustion gas passes is the highest in the portion where the burner 350 is connected, and the temperature is lowered toward the side away from the burner, so that a temperature deviation occurs between the tubes and the tube repeatedly shrinks and expands .

If the tube is fixedly installed in a state where the tube shrinks and expands repeatedly due to the high-temperature COG combustion gas, if shrinkage and expansion pressure are applied to the fixed portion of the tube, fatigue is concentrated on the tube fixing portion, There are easy disadvantages.

Korean Patent Laid-Open Publication No. 2014-0088673 (published on July 11, 2014)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cushioning rail unit that supports the tube to prevent the tube from being affected by repeated shrinkage and expansion of the tube.

The radiant tube of the present invention comprises a tube body having a plurality of straight tube portions arranged at regular intervals to achieve the above object and a plurality of bending portions connecting both ends of the straight tube portion so as to communicate with each other, A burner receiving part formed to be communicated with one end of the tubular body so as to be communicated in a parallel direction; a support rod projecting in a direction parallel to the straight tubular part at the other end of the tubular body facing the burner receiving part; A first fixing block supported on an outer surface of the first fixing block, a second fixing block supported by the supporting rod, and a buffer rail between the supporting rod and the second fixing block so that the supporting rod can flow in the second fixing block do.

The tubular body may have a W-shape and a Φ-shape.

The present invention provides a burner comprising: a tubular body including a bendable portion connecting both ends of the straight pipe portion so that the straight pipe portions communicate with each other; a burner accommodation portion communicated with one end of the pipe body in a direction parallel to the straight pipe portion; A first fixing block supported on the outer surface of the burner receiving portion, a second fixing block supported by the support bar, and a second fixing block supported by the support bar, By providing the buffer rail portion between the support rod and the second fixed block so as to be able to flow in the second fixed block, it is possible to effectively cope with shrinkage and expansion of the pipe body.

In addition, it is possible to prevent sagging or distortion of the radiant tube after installation, thereby reducing the fatigue of the tube, thereby improving durability.

1 is a sectional view showing a conventional radiant tube.
2 is a stereoscopic view of the radiant tube of the present invention.
Fig. 3 is a cutaway view of Fig. 2. Fig.
4 is a front view of Fig.
5 is an exploded perspective view of Fig.
6 is a cross-sectional view illustrating an arrangement structure of a buffer rail portion provided in a second fixed block of the present invention.

Hereinafter, the technical structure and operation of the radiant tube 600 of the present invention will be described with reference to FIGS. 2 to 6. FIG.

2 and 3, the radiant tube 600 of the present invention includes a tubular body 400 including curved tube portions 301 and 302 connecting both ends of the straight tube portion so that the straight tube portions 401, 402 and 403 communicate with each other. The tubular body 400 uses an inconel metal mainly composed of nickel and chromium.

A burner accommodating portion 310 configured to communicate with the straight pipe portions 401, 402, and 403 through the bending portion 302 in the same direction as the center axis of the straight pipe portion 402 constituting the tubular body; 403 and 403 through the bending portion 301 in the same direction as the center axis of the bending portion 320. [

The support bar 320 is configured to prevent the support bar 320 from being damaged by thermal expansion or contraction by welding a reinforcing plate or the like inside the support bar 320 in a direction perpendicular to the center axis direction of the support bar 320. The burner receiving portion 310, the support bar 32, and the reinforcing plate in the support bar are made of the same material as the tubular body.

The tubular body 400 configured as described above is not limited to the Φ-shape as in the structure exemplified in the present invention, but may be formed in various shapes such as a W-shape.

The burner receiving portion 310 is fixed to the first fixing block 510 and the supporting bar 320 is supported on the second fixing block 520. [ The first fixing block 510 and the second fixing block 520 act as a wall for securely supporting and fixing the tube 400.

5 and 6, the fixing groove 521 formed in the second fixing block 320 for supporting the supporting bar 320 is formed to be slightly larger than the outer diameter of the supporting bar 320, And a pair of buffer rails 522 and 522 are supported on the bottom of the fixing groove 521 so as to support the lower portion of the supporting rod 320 and are supported by the support rods 320 ) Are located. The support rods 320 can be moved along the buffer rails via the buffer rails 522 and 522 in the fixing grooves 521 as described above, The fixing grooves 521 and the buffer rails 522 and 522 and the support rods 320 interact with each other to smoothly absorb deformation of the tube 400 due to thermal expansion and contraction, It is possible to prevent breakage (600) of the tube.

A burner (not shown) may be installed at the inside or the end 311 of the burner accommodating part 310 and a gas injection pipe 330 for injecting COG combustion gas may be installed in the tube 400. The COG combustion gas injected into the tubular body 400 through the gas injection tube 330 is burned in the tubular body 400 by the ignition of the burner and the tubular body is heated by the heat generated during the burning.

The radiant tube 600 described above is not limited to the technical structure of the present invention, and can be variously modified and modified without departing from the technical idea and object of the present invention.

250,400 - Tubular body
260 - rib
270 - Reinforced plate
300 - blocking plate
301, 302 -
310 - Burner receiving part
320 - Support Rod
330 - Gas injection tube
350 - Burner
401, 402, 403 -
500,600 - Radiant tubes
510 - first fixed block
520 - second fixed block
521 - Fixing groove
522 - buffer rail
523 - Space

Claims (2)

A tubular body including a plurality of straight tube portions arranged at regular intervals and a plurality of bending portions connecting both ends of the straight tube portion so that the plurality of straight tube portions communicate with each other; A first fixing block supported on an outer surface of the burner accommodating portion, and a second fixing block supported on an outer surface of the burner accommodating portion; And a cushion rail portion between the support rod and the second fixing block such that the support rod can flow in the second fixing block. The method according to claim 1,
Wherein the tubular body is formed in a W-shape or a Φ-shape.

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