KR200414297Y1 - Double communication pipe - Google Patents

Abstract

The present invention relates to a double communication tube having a double structure of the outer tube and the inner tube, and more particularly, to a double communication tube that can easily and firmly secure the gap maintaining member coupled between the outer tube and the inner tube.

In the double communication tube according to the present invention, in the double communication tube which is coupled to the inner surface of the outer tube and the outer surface of the inner tube to the inner side and the outer side of the inner portion of the connecting portion is bent in the double communication tube, the gap maintaining member is the outer side The outer side of the support is bent and folded to have elasticity, while the inner concave engaging portion is formed, and a fixed clip is formed at the distal end of which the expansion part is opened, and an annular protrusion frame is formed around the distal end of the outer tube. By pressing and inserting the fixing clip of the gap holding member into the front end portion of the outer tube, the gap holding member is firmly supported by the annular protrusion frame.

Communicating tube, double, inner tube, outer tube, spacing member, fixed clip.

Description

Double communication pipe {DOUBLE SMOKE PIPE}

1 is a perspective view of a spacing member coupled to a double communication tube according to the present invention

2 is a plan view of a state in which the spacing member is coupled to the double communication tube according to the present invention

3 is a cross-sectional view taken along the line A-A of Figure 2, showing a state in which the spacing member is coupled to the double communication tube;

Figure 4 is a cross-sectional view showing a state in which the interconnecting double communication tube according to the present invention

5 is a cross-sectional view of a conventional double communication tube

<Explanation of Signs of Major Parts of Drawings>

1: double communication tube 2: outer tube

2a: annular protrusion frame 2b: step

2c: groove 3: inner tube

4: insulation space 5: external pipe fastening band

6: inner tube fastening band 5a, 6a: fastening portion

10: spacing member 11: connection portion

12: inner support 13: outer support

14: fixing clip 14a: hook

14b: expansion

The present invention relates to a double communication tube having a double structure of the outer tube and the inner tube, and more particularly, to a double communication tube that can easily and firmly secure the gap maintaining member coupled between the outer tube and the inner tube.

In general, the double communication pipe is installed to discharge smoke or exhaust gas generated from a combustion device such as a boiler to the outside, and prevents a fire due to heat generated from the combustion device, and at the same time, provides a passage for communicating external air. The space keeping member is coupled to form a space.

As shown in FIG. 5, the gap maintaining member 110 coupled to the conventional double communication tube 101 has an inner support part 112 bent perpendicularly to both sides of the connection part 111 having a width of the heat insulating space 104. The outer support part 113 is formed.

A plurality of such space maintaining member 110 is radially coupled to the adiabatic space 104 of the double communication tube 101, while holding the inner support portion 112 of the space maintaining member 110 in the distal end of the outer tube (102). The front end portion of the outer support portion 113 is brought into close contact with the side surface and is fixed to the outer tube 102 by spot welding (W) the abutted end portion.

As the separate welding work is delayed, the work time is delayed and the welding work must be carried out by holding each one of the space keeping members 110, which is cumbersome and very inconvenient.

In addition, since the conventional double communication tube 101 spot welds only one end portion of the gap maintaining member 110, the welded part easily falls due to corrosion or external impact, and thus exhaust gas is discharged. There was also a problem that the noise is generated when the separated interval maintaining member is shaken.

Accordingly, the present invention is to solve the above problems, the object of the present invention is to provide a double communication tube that can be easily and quickly coupled to the double communication tube without welding the gap retaining member and the fixed state is solid.

In order to achieve the above object, the double communication tube according to the present invention includes an inner and an outer support part 12 on both sides of the connection part 11 so as to be in close contact with the inner surface of the outer tube 2 and the outer surface of the inner tube 3. In the double communication tube (1) to couple the gap holding member 10 is bent 13, the gap holding member 10 is bent to the outside of the outer support portion 13 is folded and concave inward while having elasticity A fixed clip 14 having a portion 14a formed therein and an extension portion 14b open outward is formed at the front end thereof, and an annular protrusion frame in which the engaging portion 14a is in close contact with the front end of the outer tube 2. (2a) is formed, the gap retaining member 10 is firmly attached to the annular protruding frame (2a) by pressing the fitting clip (14) of the spacing holding member 10 to the front end of the outer tube (2). It is characterized by being supported.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a gap maintaining member coupled to a double communication tube according to the present invention, Figure 2 is a plan view of a state in which the gap maintaining member is coupled to a double communication tube according to the present invention, Figure 3 is a cross-sectional view taken along line AA of FIG. , Is a view showing a state in which the spacing member is coupled to the double communication tube.

The spacing member 10 according to the present invention is manufactured by bending a metal plate, as in the form of the conventional spacing member 110 shown in FIG. 5, the inner support portion 12 perpendicular to both sides of the connection portion 11. ) And the outer support 13 is bent and the inner, outer support 12, 13 is the same in the close contact with the outer surface of the inner tube (3) and the inner surface of the outer tube (2), but the outer The support 13 is formed long and is bent outward from the middle portion thereof is characterized in that the fixing clip 14 is formed.

The fixing clip 14 has a bent portion connected in an inverted triangle shape so as to have elasticity, and a locking portion 14a is formed to be concave to the inner side immediately below it, and the tip portion is an extension part that is opened outward ( 14b) is formed.

As shown in Figure 2, the fixed clip 14 is a plurality of radially coupled to the heat insulating space (4) between the outer tube (2) and the inner tube (3) of the double communication tube (1) is an outer tube (2) ) And the inner tube (3) form a concentric circle.

On the other hand, around the distal end of the outer tube (2) is formed an annular protruding frame (2a) protruding outward, the annular protruding frame (2a) is formed on the inner surface of the engaging portion (14a) formed in the fixing clip 14 It is projected to fit.

The gap maintaining member 10 can be easily coupled to the double communication tube 1 by the fixing clip 10, which will be described in detail with reference to FIG.

First, in the state in which the inner tube (3) is inserted into the outer tube (2), the gap retaining member 10 is coupled, between the extension portion 14b and the outer support portion 13 of the fixing clip 14 To the front end of the outer tube (2) and push the fixed clip (14) in the annular projection frame (2a) formed in the outer tube (2) and then out of the annular projection frame (2a) while the Omura by elastic force The locking portion 14a of the fixing clip 14 is held in close contact with the annular protrusion frame 2a.

In this way, the fixing clip 14 of the space keeping member 10 is simply pressed into the distal end of the outer tube 2 so as to be easily coupled, and the concave locking portion 14a of the fixing clip 14 is connected to the outer tube 2. It is caught by the annular protruding frame 2a to maintain elasticity and is firmly fixed to the outer tube 2.

4 is a cross-sectional view illustrating a state in which the double communication tube 1 is connected to each other according to the present invention. The clearance 1 can be extended long.

That is, when connecting the double communication pipes 1, 1 'of constant length to each other, the cross-sectional shape is formed around the outer circumference of the butt flanges 3a, 3a' of the inner pipes 3, 3 '. <'Shaped to wrap the fastening band 6, the bolts are coupled to the fastening holes 6b of the fastening part 6a on one side to fix the inner tubes 3, 3' mutually, and are spaced apart from each other. Wrap the fastening band 5 around the outer surface of the outer tube (2), (2 ') to engage the bolt in the fastening hole (5b) of the fastening portion (5a) of the outer tube (2), (2') Can be fixed.

Here, the step jaw (2b) is formed just below the front end of the outer tube (2) to which the spacing member (10) is coupled so that the front end of the outer tube (2) is preferably formed to enter the inside, which is the spacing member This is to prevent the portion (10) is coupled to protrude from the outer surface of the outer tube (2).

On the other hand, a banding groove 2c is formed around the outer surface just below the step 2b, and a portion bent inward of the fastening band 5 is in close contact with the banding groove 2c. Is fixed so as not to flow out of the outer tube (2).

As described above, the double communication tube according to the present invention has been described with reference to the drawings, but the present invention is not limited by the embodiments and drawings disclosed herein, and those skilled in the art within the scope of the technical idea of the present invention Of course, various modifications can be made.

As described above, according to the double communication tube according to the present invention, since the gap retaining member can be easily fixed to the double communication tube by the fixing clip having elastic force, the assembling work can be made quickly, and the welding work by the existing welding technician This is not necessary and can be easily assembled by anyone.

In addition, since the fixing clip of the gap holding member is firmly fixed by being caught by the annular protrusion frame formed in the outer tube of the double communication tube, the gap holding member does not flow when exhaust gas is discharged and thus no noise is generated.

In addition, it can be extended according to the installation place of the combustion apparatus by connecting the mutual communication pipe coupled to each other by a coupling band coupled to the spacing member.

Claims (1)

The inner and outer support portions 12 and 13 are coupled to the inner surface of the outer tube 2 and the outer surface of the inner tube 3 so as to couple the space maintaining member 10 bent. In the double communication pipe (1), The gap retaining member 10 is bent to the outside of the outer support portion 13 is folded to have a resilient locking portion (14a) is formed on the inner side while having elasticity and a fixed clip (14b) is formed to be extended to the outer end ( 14 is formed, and an annular protrusion frame (2a) is formed around the distal end of the outer tube (2) in close contact with the engaging portion (14a), the fixing clip (14) of the spacing member (10) A double communication tube, characterized in that the gap holding member 10 is firmly supported by the annular protruding frame (2a) by press-fitting into the front end portion of the outer tube (2).

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