KR20090073821A - Duct assembly for flue - Google Patents

Abstract

The disclosed flue duct assembly includes an inner tube having flanges formed at both ends thereof so as to continuously combine with a plurality of exhaust pipes, and a first connection for fastening the flanges joined to each other to connect and assemble the plurality of inner tubes. A flue duct assembly including a band and an outer tube installed to cover an outer circumferential surface of the inner tube while maintaining a predetermined distance from the inner tube, wherein the flange is filled in the face of the flange gap butt to connect and assemble the inner tube. A first heat resistant sealant; A second heat resistant sealant filled in the first connection band and the outside of the flange while the flange is engaged; A foamed aluminum tube installed on an inner circumferential surface of the inner tube and having a plurality of voids formed therein; And an airtight guide ring supporting the foamed aluminum tube and covering the flange gap formed between the flange and the flange, and installed on an inner wall of the inner tube to maintain airtightness in the gap.

According to the present invention, it is possible to prevent leakage due to exhaust gas and leakage due to condensate, and to reduce noise, vibration, and heat generated in the duct assembly.

Description

Duct assembly for flue {DUCT ASSEMBLY FOR FLUE}

The present invention relates to a flue duct assembly, and more particularly, after the construction of the flue used as exhaust pipes for industrial boilers, absorption cold and hot water units, diesel generators, turbine generators, gas engines, various vents (vents), noise, vibration An improved flue duct assembly is provided to reduce the occurrence, to maintain high temperature exhaust gas insulation, and to prevent the exhaust gas from leaking out and condensate leaking out at the connection (flange) of the duct assembly.

For example, a flue duct system is installed in a large building such as an apartment or a factory to discharge the combustion gas generated from these buildings is schematically shown in FIG.

Referring to Figure 1, in general, the combustion gas (exhaust gas) generated by the operation of the boiler 7 in the building to be discharged to the outside of the building through the duct assembly (1, 2) consisting of a plurality of connected.

The duct assembly 1, 2 has a horizontal duct assembly 1 and a vertical duct assembly 2 depending on the installation state. Typically, the horizontal duct assembly 1 and the vertical duct assembly 2 are combined to form a flue duct system as shown in FIG.

And the fixed support (4,8) is fixed to the horizontal duct assembly 1 and the vertical duct assembly (2) to support the horizontal duct assembly (1) and the vertical duct assembly (2) do.

In FIG. 1, reference numeral 3 denotes a stack cap, reference numeral 5 denotes a check hole for inspecting the inside of the duct assembly 2, and reference numeral 9 denotes a duct assembly. To show the expansion valve installed on one side of the duct assembly (2) to vary the length of (2).

The configuration of the horizontal duct assembly 1 and the vertical duct assembly 2 is almost the same as will be described later.

Therefore, in FIG. 2, for example, the configuration of the vertical duct assembly 2 of the duct assemblies 1 and 2 of FIG. 1 will be described.

Referring to FIG. 2, the duct assembly 2 engages upper and lower (or front and rear) inner tubes 2b and 2b 'and flanges 2b-1 of inner tubes 2b and 2b'. A first connection band 2e used to cover the outer circumferential surfaces of the inner tubes 2b and 2b 'and outer tubes 2a and 2a' installed at regular intervals outside the inner tubes 2b and 2b '; And a second connection band 2d provided to fasten the outer tubes 2a and 2a '.

In addition, spacers (2c, 2c ') are provided between the outer tubes (2a, 2a') and the inner tubes (2b, 2b ') to support them and maintain their spacing constant. At this time, an air layer of about 25 mm is formed between the outer diameter O.D and the inner diameter I.D by the spacers 2c and 2c '.

Thus, the duct assembly 2 of FIG. 2 forms a kind of double tube consisting of the outer tubes 2a and 2a 'and the inner tubes 2b and 2b'.

3 shows another embodiment of a duct assembly.

In the duct assembly 6 of FIG. 3, the intermediate tubes 6g and 6g 'are provided between the inner tubes 2b and 2b' and the outer tubes 6a and 6a ', and the spacers 2c and 2c are disposed between them. ', 6b, 6b') is provided. In addition, a first connection band 2e for fastening the inner tubes 2b and 2b 'and a second connection band 6d for fastening the outer tubes 6b and 6b' are provided.

In this case, the spacers 2c, 2c ', 6b, and 6b' each have a diameter of about 25 mm between the outer diameter OD and the intermediate diameter MD and between the intermediate diameter MD and the inner diameter ID. All about 50 mm).

Thus, the duct assembly 6 of FIG. 3 forms a kind of triple tube consisting of outer tubes 6a and 6a ', intermediate tubes 6g and 6g', and inner tubes 2b and 2b '.

In the duct assemblies 2 and 6 configured as described above, the circumferential portion A of the first connection band 2e, which is a type of V-band, which fastens the flanges 2b-1 of the inner tubes 2b and 2b ', respectively, is A detailed view, shown in detail, is shown in FIG. 4.

Referring to FIG. 4, before fastening the flanges 2b-1 of the inner tubes 2b and 2b ', a heat-resistant sealant 2f is filled in the first connection band 2e to increase the fastening force. Alternatively, the exhaust gas passing through (flowing) the duct assemblies 2 and 6 is not leaked, and condensed water formed in the inner wall of the duct assemblies 2 and 6 is not leaked.

And the first connection band (2e) is finally fastened by a fastening member (2h) consisting of a bolt and a nut, the inner tube (2b, 2b ') is tightly coupled. In addition, the external pipes 2a, 2a ', 6a, and 6a' are also fastened by the second connection bands 2d and 6d and the fastening member 2h, thereby assembling the duct assemblies 2 and 6 of the double pipe or the triple pipe. Is done.

The duct assemblies 2 and 6 configured as described above are generally made of stainless steel having excellent corrosion resistance, and are connected to the exhaust gas outlet of the basement heat source equipment (for example, a boiler) and connect these assemblies 2 and 6 to each other. Assemble a plurality of vertically or horizontally to connect to the rooftop to exhaust the exhaust gas.

By the way, in the past, the temperature of the exhaust gas flowing inside the duct assembly was used at about 200 ° C. to 250 ° C. or less, so that very little internal condensate was generated. However, waste heat recovery devices are installed in current heat source equipment (eg, boilers). As the exhaust gas temperature is 100 ° C to 150 ° C, a large amount of self-condensate is generated.

In addition, if the waste heat recovery system is not applied to the diesel generator and gas turbine generator equipment, the exhaust gas temperature is discharged over 300 ° C to 600 ° C. At the same time, the pressure inside the duct assembly 2 and 6 is increased by high speed forced exhaust, It is emphasized.

In response to this, as described above, the airtight sealant 2f is simply maintained in the first connection band 2e, which is a V-band, so that it is not possible to come up with an improvement plan suitable for the conditions at this time, and thus serious problems such as leakage and leakage. Indicates.

In addition, even when the first connection band 2e is fastened, as shown in FIG. 4, there is a gap C between the flanges 2b-1, so that a plurality of duct assemblies 2 and 6 are assembled. At the moment of vibration, external shock, or air expansion inside the tube at the moment of movable ignition of the equipment, a gap is generated inside the groove of the first connecting band 2e.

This phenomenon repeatedly proceeds to reduce the adhesive force of the heat resistant sealant 2f, and the heat resistant sealant 2f is cured by the exhaust gas of a high temperature to be crushed to reduce the airtight performance. At this time, there is a problem of leakage of exhaust gas and leakage of condensate.

At present, even when the above problems (leakage, leakage) can be predicted, there is a lack of efforts to improve the problems, and thus the construction is proceeding according to the existing method.

As a result, defects for noise, vibration, heat generation, smoke leakage, and water leakage are frequently performed during commissioning or use after completion of construction, resulting in economic losses and consumer complaints.

And although not shown in the drawing, the pipe used for the duct assembly is made of stainless steel perforated plate to reduce the noise generated in the flue, and the outer circumferential surface is first wound with glass cross fiber material, and secondly with glass wool or cerac wool insulation. The sound absorption tube which improved sound absorption property was devised.

However, the sound absorbing tube made of glass wool or ceramic wool insulation as described above, the sound absorption performance for the transmission of noise and vibration is high, but absorbs condensed water or condensed water, the heat insulating material is agglomerated in the direction of gravity occurs And thermal insulation performance is reduced.

In addition, with the passage of time, the fiber insulation is worn out and torn, discharged as a fatal powder to the human body has a problem that blows into the air.

The present invention was created to solve the above problems, to prevent leakage and leakage occurring inside the duct assembly, to prevent the occurrence of noise or vibration without using a thermal insulation material harmful to the human body, It is an object of the present invention to provide a flue duct assembly in which heat insulation is maintained to prevent heat generation.

In order to achieve the above object, the flue duct assembly of the present invention has an inner tube having flanges formed at both ends thereof so as to be coupled to a plurality of continuously to exhaust the exhaust gas, and the plurality of inner tubes are connected to each other to be assembled. In the duct assembly for the flue comprising a first connection band for fastening the butted flange and an outer tube installed to surround the outer circumferential surface of the inner tube while maintaining a predetermined distance from the inner tube, connecting and assembling the inner tube A first heat resistant sealant filled in the flange gap surface facing each other; A second heat resistant sealant filled in the first connection band and the outside of the flange while the flange is engaged; A foamed aluminum tube installed on an inner circumferential surface of the inner tube and having a plurality of voids formed therein; And an airtight guide ring supporting the foamed aluminum tube and covering the flange gap formed between the flange and the flange, and installed on an inner wall of the inner tube to maintain airtightness in the gap.

According to an embodiment of the present invention, while installing the airtight guide ring for maintaining the airtightness is installed on the inner wall inner wall so as to cover between the butted flange to maximize the airtightness of the gap between the flange, foamed aluminum in the airtight guide ring The tube is fitted with insulation to reduce vibration and noise.

Therefore, it is possible to prevent leakage due to exhaust gas and leakage due to condensate, to insulate the duct assembly, to solve the heat generation problem, to reduce vibration and noise, that is, to absorb sound, heat insulation, airtightness, and It is possible to implement a year (exhaust) with maximized safety, thereby minimizing the maintenance of the duct assembly (year) can reduce the cost of maintenance.

In addition, noise, vibration and heat generation problems can be eliminated, increasing customer confidence in the product.

In addition, the material applied to the duct assembly is all made of metal, does not generate harmful substances to the human body, and can solve the pollution problem, and because all of the metal material can be recycled, economical and environmentally friendly.

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

Figure 5 is a block diagram showing the configuration of a double duct assembly for flue in one embodiment according to the present invention.

Referring to the drawings, the flue dual duct assembly 10 according to the present invention, the flange 12a at the upper end and the lower end (both ends) so that a plurality of them are continuously coupled to the combustion gas or exhaust gas flows through the interior thereof. Of the inner tube (12, 12 '), the first connection band 15 for fastening the flange (12a) of the inner tube (12, 12'), and the inner tube (12, 12 ') of An outer tube (11,11 ') installed at a predetermined interval outside the inner tube (12,12') and surrounding the outer circumferential surface, and a second connection band (14) installed to fasten the outer tube (11,11 '). And spacers 13 and 13 'installed between the outer tubes 11 and 11' and the inner tubes 12 and 12 'to support them and at the same time maintain their spacing constant.

At this time, an air layer of about 25 mm is formed between the outer diameter O.D and the inner diameter I.D by the spacers 13 and 13 '.

6 is a block diagram showing the configuration of the triple duct assembly for the flue in another embodiment according to the present invention.

In the triple duct assembly 30 for flue according to the present invention, intermediate pipes 33 and 33 'are installed between the inner pipes 12 and 12' and the outer pipes 31 and 31 ', respectively, with spacers therebetween. (13, 13 ', 35, 35') are provided.

In addition, a first connection band 15 and a second connection band 36 are installed to fasten the inner tube 12 and 12 'and the outer tube 31 and 31'.

At this time, the spacers 13, 13 ', 35, and 35' are each approximately 25 mm between the outer diameter OD and the intermediate diameter MD and between the intermediate diameter MD and the inner diameter ID. Air layer is formed.

The inner tubes 12 and 12 'are formed by using a stainless steel plate having a thickness of 0.8 to 2.0 mm, and the flange 12b is 90 to about 10 to 12 mm at both ends of the inner tubes 12 and 12'. Also bent to form.

In addition, connecting bands 14 and 36 are installed to fasten the outer tubes 11, 11 ', 31, and 31' in FIGS. 5 and 6, wherein the connecting bands 14 and 36 are bolts and nuts. The fastening member 16 made up is used and fastened.

The circumferential portion B of the first connection band 15, which is a type of V-band, which fastens the flange 12a of the inner tube 12, 12 'in the duct assembly 10, 30 configured as described above, respectively, is described in detail. The detailed view shown is shown in FIG. 7.

That is, it can be seen that the flue duct assembly according to the present invention is applied regardless of the double pipe duct assembly 10 or the triple pipe duct assembly 30.

Referring to Figure 7, the flue duct assembly (10, 30) according to the present invention, the gap (C; see Fig. 4) between the inside of the butt flange 12a for connecting and assembling the inner tube (12, 12 ') ) Inside the first connection band 15 (15a) in a state where the first heat-resistant sealant 21 filled with the first heat sealant 21 and the first connection band 15 are fastened to the flanges 12a of the inner tubes 12 and 12 '. ) And a second heat-resistant sealant 22 filled outside the flange 12a of the inner tube 12 and 12 'and the inner circumferential surface of the inner tube 12 and 12', and a plurality of voids are formed throughout. An inner tube 12, 12 'between the foamed aluminum tube 25, 25' and the foamed aluminum tube 25, 25 'while supporting the inner tube 12 and the flange 12a abutted. ) Is installed on the inner wall surface to cover the gap (C) between the flange (12a) is configured to include a hermetic guide ring (23, 23 ') to maintain the airtight of the gap (C).

At this time, the hermetic guide rings 23 and 23 'are made of stainless steel which is the same material as the inner tubes 12 and 12'. At this time, the hermetic guide ring 23, 23 'is made of a stainless steel plate having a thickness of 1.0mm or more that can be easily made (w1, w2).

In addition, U-grooves 23a are formed at the edges of the airtight guide rings 23 and 23 'to support both ends of the foamed aluminum tubes 25 and 25', as shown in FIGS. 7 and 8. do. In addition, the height of the airtight guide rings 23 and 23 ', ie, the height of the outer circumferential surface of the U-groove 23a, covers the gap C between the flanges 12a while the airtight guide rings 23 and 23' are installed. At least 100mm below the height.

Accordingly, the airtight guide rings 23 and 23 'are installed (welded) to close the flange 12a of the inner tube 12 and 12'. That is, the airtight guide rings 23 and 23 'are installed to be positioned to be somewhat out of the flange 12a.

In addition, the outer circumferential surfaces of the hermetic guide rings 23 and 23 'are attached to the inner circumferential surfaces of the inner tubes 12 and 12' by, for example, argon welding w1 and w2 suitable for welding of stainless steel material.

The first and second heat resistant sealants 21 and 22 use heat resistant silicon. However, the present invention is not limited to this.

Referring to the operation of the flue duct assembly according to the present invention having the configuration as described above are as follows.

Referring again to the drawings, the inner tubes 12, 12 'of the flue duct assembly 10, 30 according to the invention are made by forming a stainless steel sheet into a circular tube, in particular the inner tubes 12, 12'. Both ends of the bent by 90 degrees to form a flange (12a).

In addition, a 25 mm air layer is formed on the outer circumferential surface of the inner tube 12 and 12 ′, and when only the outer tube 11 and 11 ′ is installed on the outer circumferential surface, the double tube of FIG. Two pipes, that is, intermediate pipes (33, 33 ') and outer pipes (31, 31') are installed in the outer peripheral surface of the triple pipe.

In addition, a foamed aluminum tube (25, 25 ') is made by bending in a circular shape in accordance with the diameter and length of the inner tube (12, 12') by using a sheet of aluminum foamed in the molten state to form a plurality of voids throughout. .

And bent to form a U-groove (23a) at the edge by using a stainless steel plate of 1.0mm or more, and bent into a circular ring to make an airtight guide ring. At this time, the height of the outer circumferential surface of the U-groove 23a is 100 mm or less.

In addition, in order to improve the formability when bending the U-groove (23a), the height is different from each other. For example, as shown in FIG. 7 and FIG. 8, the height of the inner circumferential surface is made low, and the height of the outer circumferential surface on which the welds w1 and w2 are made is formed high.

Foam aluminum pipes 25 and 25 'are fitted into the U-groove 23a of the airtight guide rings 23 and 23' thus fabricated so as to be deflected from the flange 12a side to one side (exhaust gas flow direction). Position it.

Thereafter, the outer circumferential surface of the airtight guide rings 23 and 23 'having the U-groove 23a formed on the edge of the stainless steel plate and the inner circumferential surface of the inner tube 12 and 12' are brought into close contact with each other and then argon Welding (w1, w2) is performed to be attached to each other.

The first heat resistant sealant 21 is first filled in the gap C surface of the flange 12a of the inner tube 12 and 12 'to which the airtight guide rings 23 and 23' are attached. In addition, the second heat-resistant sealant 22 is secondarily filled in the first connection band 15 having the V-groove 15a to form a circle.

Then, the flange 12a of the inner tube 12, 12 'is attached to the V-groove 15a of the first connection band 15 with the airtight guide rings 23, 23' attached thereto, The inner tubes 12 and 12 'are assembled by tightening with a fastening member 16 made of a nut.

As such, the first and second heat resistant sealants 21 and 22 are respectively filled twice and the inner tubes 12 and 12 'are assembled to maximize the function of the first and second heat resistant sealants 21 and 22. This improves airtightness.

Then, the connection point of the double pipe of FIG. 5 is filled with the second connection band 14 or the connection point of the triple pipe of FIG. 6 with the second connection band 36 to complete the assembly.

The completed duct assembly (10,30) is connected to the exhaust gas outlet of the basement heat source equipment, it is connected to the rooftop floor so that the exhaust gas is discharged.

On the other hand, as described above, when the hot exhaust gas flows inside the inner tube (12, 12 ') after the flue construction, the flange is expanded in the flange 12a portion of the inner tube (12, 12') connection to each other The clearance C of 12a is opened.

In this case, as shown in FIG. 8, the airtight guide rings 23 and 23 ′ slip inside the gap C generated as described above to prevent leakage of exhaust gas and leakage of condensate. .

And only the metal material is applied to the flue duct assembly (10, 30) according to the present invention, harmless to the human body, semi-permanent, both can be recycled.

In addition, when the high-temperature exhaust gas discharged during operation of the heat source equipment flows through the inner tubes 12 and 12 'with noise, vibration, and pressure, the foamed aluminum tube 25 disposed inside the inner tubes 12 and 12'. 25 ') flows to the void surface to dissipate noise and vibration, and inside the connection of the inner tube 12, 12' the foamed aluminum tube 25, 25 'acts as an airtight guide ring 23, 23'. It prevents leakage and leakage and has excellent insulation.

Therefore, the duct assembly (10,30) according to the present invention is the exhaust pipe (year) of the equipment, such as various buildings using heat source equipment (for example, boiler, etc.) with problems such as high temperature, high pressure, noise, vibration, smoke leakage, leakage, etc. Applicable to both.

As described above, the foamed aluminum tubes 25 and 25 ', in which aluminum is foamed to form voids, absorb noise and vibration generated therein, and the foamed aluminum tubes 25 and 25' are airtight guides. By acting as a ring (23, 23 '), the exhaust gas is guided to flow through the airtight guide ring (23, 23'), there is no leakage and leakage of gas and fluid, and excellent durability against a certain pressure inside.

As described above, the present invention has been described with reference to one embodiment shown in the drawings, but this is only an example, and those skilled in the art may make various modifications and equivalent embodiments therefrom. Will understand. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a schematic view schematically showing the configuration of a typical flue duct system.

Figure 2 shows in more detail the configuration of one embodiment of the flue duct assembly of Figure 1;

3 is a view showing in more detail the configuration of another embodiment of the flue duct assembly of FIG.

4 is an enlarged detailed cross-sectional view showing an enlarged portion 'A' of FIGS. 2 and 3.

5 is a view showing the configuration of an embodiment of the flue duct assembly according to the present invention.

6 is a view showing the configuration of another embodiment of the flue duct assembly according to the present invention.

FIG. 7 is an enlarged detailed cross-sectional view showing a portion 'B' of FIG. 5 and FIG.

8 is a partial cross-sectional view showing the configuration of FIG. 7 as a whole.

<Description of the symbols for the main parts of the drawings>

10. Duplex Duct Assembly

12,12 '. Inner tube

12a. flange

15. First connection band

33,33 '. Middle tube

21. First heat resistant sealant

22. Second heat resistant sealant

23,23 '. Airtight guide ring

25,25 '. Foam aluminum tube

30. Triple Tube Duct Assembly

Claims (7)

An inner tube having flanges formed at both ends thereof so that the exhaust gas is continuously discharged, and a first connecting band for fastening the flanges joined to each other to connect and assemble the plurality of inner tubes; In the flue duct assembly provided with an outer tube installed to surround the outer peripheral surface of the inner tube at a constant interval, A first heat resistant sealant filled in the flange gap face which is joined to connect the inner tube; A second heat resistant sealant filled in the first connection band and the outside of the flange while the flange is engaged; A foamed aluminum tube installed on an inner circumferential surface of the inner tube and having a plurality of voids formed therein; And an airtight guide ring supporting the foamed aluminum tube and covering the flange gap formed between the flange and the flange, and installed on an inner wall of the inner tube to maintain airtightness in the gap. Duct assembly. The method of claim 1, The hermetic guide ring is made of stainless steel. The method of claim 1, The hermetic guide ring is a flue duct assembly, characterized in that consisting of a plate having a thickness of 1.0mm or more. The method of claim 1, The airtight guide ring is a flue duct assembly, characterized in that the U-groove is formed at the edge to support both ends of the foamed aluminum tube. The method of claim 4, wherein Flue duct assembly, characterized in that the height of the outer circumferential surface of the hermetic guide ring made of 100mm or less. The method of claim 4, wherein The outer circumferential surface of the hermetic guide ring is attached to the inner circumferential surface of the inner tube by welding, the duct assembly for flue. The method of claim 1, Duct assembly for flue characterized in that the intermediate tube is installed in the center between the inner tube and the outer tube.

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