KR101678934B1 - Exhaust pipe connection structure for boiler - Google Patents

Abstract

The present invention provides a structure connecting a pipe for discharging exhaust gas of a boiler, comprises a heat exchanger (10) and a connection pipe (30). The heat exchanger (10) has a plurality of locking pieces (22) formed on an inner surface of an exhaust pipe. The connection pipe (30) allows female-male engagement through an engagement piece (32) interposed in the exhaust pipe and upwardly supports the pipe for exhaust gas. Accordingly, the connection pipe is added to a condensing type-boiler to allow female-male engagement of a part where the heat exchanger and the pipe are connected, thereby improving assembling feasibility in fastening bolts.

Description

Exhaust pipe connection structure for boiler

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust emission year of a boiler, and more particularly, to an exhaust emission heat transferring structure for a boiler for improving a duct for exhausting exhaust gas from a heat exchanger in a condensing boiler.

Recently, preference for condensing type gas boiler based on heat exchanger composed of sensible heat exchange unit and latent heat heat exchange unit is increasing so as to maximize thermal efficiency with minimum fuel consumption. However, in the process of introducing the light and short design which is universally required for most products into the condensing boiler, the airtightness of the exhaust pipe and the ease of assembly should be secured.

Korean Priority No. 0232718 (Prior Art 1) and Korean Patent Laid-Open Publication No. 2005-0036152 (Prior Art 2) are known as prior art documents which can be referred to in this connection.

In the prior art reference 1, grooves having a semicircular cross section, which are coupled to each other at the joint portion between the exhaust duct and the flue in the flue assembling structure of the boiler, are formed. Then, at the joining portions of these grooves, A sealing ring made of a material having a compression elastic force and a tight elastic force according to the elasticity for preventing the elastic member is inserted.

In the prior art document 2, a ground surface is formed so that exhaust gas is discharged to the outside, and the one side of the body is fixed to the fixing surface of the condensed water receiver while being seated, and the other side is positioned as the bottom surface of the fastening piece of the condensing heat exchanger. And an exhaust duct in which an intermittent support surface is formed so as to be able to be interrupted by a fixing member. Therefore, the effect of improving the leakage phenomenon of the condensed water and the assembling convenience due to the seating of the exhaust duct is expected.

However, according to the prior art document 1, due to the groove and seal ring between the exhaust duct and the flue, or the fastening piece and the interlocking support structure of the prior art document 2, there is a limitation in achieving good assemblability that is based on the design of the light and small boiler of the condensing boiler.

1. Korean Registered Utility Model No.0232718 "Structure of Yearly Assembly of Gas Boiler" (Open Date: May 15, 2000) 2. Korean Unexamined Patent Publication No. 2005-0036152 entitled "Condensate Receiver and Exhaust Duct Assembly Structure of Condensing Boiler" (Published on April 20, 2005).

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems in the prior art by providing a joint pipe capable of engaging with a heat exchanger and a flue in a boiling condensing boiler, And to provide an exhaust-gas tightening structure of the boiler.

In order to achieve the above object, the present invention provides a structure for fastening a flue for discharging exhaust gas of a boiler, comprising: a heat exchanger having a plurality of latching pieces on an inner surface of an exhaust port; And a joint pipe which engages with the exhaust port in male and female through the engagement piece and supports the flue of the exhaust gas upwardly.

As a detailed configuration of the present invention, a lower packing is provided between the exhaust port and the joint pipe, and an upper packing is provided between the joint pipe and the flue.

As described above, according to the present invention, in the condensing boiler, a joint pipe capable of engaging with the heat exchanger and the flue is provided at the portion where the heat exchanger and the flue are connected.

1 is a structural view showing an exhaust flap fastening structure according to the present invention in an assembled state
Fig. 2 is a schematic view showing an exhaust flue fastening structure according to the present invention in a separated state
3 is a cross-sectional view of a main portion of an exhaust flue fastening structure according to the present invention

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

The present invention proposes a structure for fastening a flue from which the exhaust gas of a boiler is discharged. Boilers are intended for, but are not necessarily limited to, condensing systems with high thermal efficiency. The duct is a pipe duct for discharging the burned gas to the outside, and its inner end is connected to the boiler and the outer end is drawn out to the outside.

According to the present invention, the heat exchanger (10) has a plurality of latching pieces (22) on the inner surface of the exhaust port (15). The heat exchanger (10) has an exhaust port (15) at one side for exhausting exhausted combustion gas. The exhaust port 15 is formed in an accurate circular shape and has a latching piece 22 on the circumference of the same height on the inner surface. It is exemplified that the latching pieces 22 are formed in three places in the city with an "L" -shaped cross section.

According to the present invention, the joint pipe (30) has a structure in which the joint pipe (30) is engaged with the exhaust port (15) through the engaging piece (32) and supported upwardly. The diameter of the connecting pipe 30 may be set differently between the upper side connected to the flue and the lower side connected to the exhaust port 15. In any case, at the end of the lower portion of the coupling pipe 30, the engaging piece 32 is formed in the same quantity as the above-described retaining piece 22. In the illustrated embodiment, the engaging piece 32 is formed as an "a"

When the joint pipe 30 is held in the hand and fitted into the exhaust port 15 of the heat exchanger 10 and then the opening of the engagement piece 32 is positioned on the retaining piece 22 and rotated, So that the exhaust port 15 is quickly engaged. Of course, if the joint pipe 30 is held in the hand and rotated in the opposite direction, the engagement of the engaging piece 22 and the engaging piece 32 is released, and the joint pipe 30 is quickly separated.

2, a flange is formed at a position separating the upper portion and the lower portion of the coupling pipe 30, and a plurality of fastening holes 34 are formed.

At this time, a plurality of dust-proof ribs 36 are formed on the outer circumferential surface of the upper portion of the coupling pipe 30. The vibration-proof ribs 36 increase the mechanical strength and rigidity of the coupling pipe 30 and prevent the flushing pipe 30 from flowing. It is preferable that at least a part of the vibration-proof rib 36 is made of a resin material having an elastic force.

The engagement piece 32 and the vibration proof rib 36 of the present invention can be formed as an integral injection structure in the molding process of the joint pipe 30. [

On the other hand, a plurality of auxiliary pieces 24 are formed on the inner surface of the exhaust port 15 of the heat exchanger 10 on the upper side of the retaining piece 22. The engaging pieces 22 and the auxiliary pieces 24 are alternately formed at equal intervals to relieve eccentricity and flow of the joint pipe 30 with respect to the exhaust port 15. [ The auxiliary piece 24 can be used to fasten the bolt in correspondence with the fastening hole 34 formed in the flange of the coupling pipe 30.

As a modification of the present invention, the retaining piece 22 formed on the exhaust port 15 of the heat exchanger 10 may be formed by insert molding of a rivet or the like having a high wear resistance without forming a single resin structure. Also in this case, the rivet can be engaged with or detached from the engaging piece 32 of the coupling pipe 30 to assure the ease of assembly.

The present invention is characterized in that a lower packing 41 is provided between the exhaust port 15 and the joint pipe 30 and an upper packing 42 is provided between the joint pipe 30 and the flue . The lower packing 41 is provided between the upper latching piece 22 and the lower latching piece 32 to enhance the airtightness of the lower side gap. The upper packing 42 is provided between the joint pipe 30 and the flue, thereby enhancing the airtightness of the upper gap.

At this time, it is preferable that the lower packing 41 is installed to be fitted to the latch piece 22 and the upper packing 42 is fitted to the vibration-proof rib 36. This is to maintain the position in the process of assembling the duct with the joint pipe 30 to maintain the assembling convenience.

In general, when assembling the heat exchanger and the exhaust flue, a process such as hemming and caulking is carried out and a bolting process is carried out. According to the present invention, however, the assembling is completed merely by manually turning the coupling pipe 30 by hand, and the airtightness is also maintained.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

10: heat exchanger 15: exhaust port
22: a side piece 24: a side piece
30: joint pipe 32:
34: fastening hole 36: anti-vibration rib
41; Lower packing 42: Upper packing

Claims (2)

Claims [1] A structure for fastening a flue for discharging exhaust gas of a boiler, comprising:
A heat exchanger (10) having a plurality of retaining pieces (22) on the inner surface of the exhaust port (15); And
And a joint pipe (30) which engages with the exhaust port (15) through male engaging piece (32) and supports the flue of the exhaust gas upwardly,
A lower packing 41 is provided between the exhaust port 15 and the coupling pipe 30 and an upper packing 42 is provided between the coupling pipe 30 and the pipe,
The engaging pieces 22 are formed in three places in an L-shaped cross section, and the engaging pieces 32 are formed in an axial "b"
Characterized in that a plurality of auxiliary pieces (24) are formed on the inner surface of the exhaust port (15) and the auxiliary pieces (24) are coupled correspondingly to the fastening holes (34) formed in the joint pipe (30) Fastening structure. delete

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