KR20230089933A - Stack assembly - Google Patents

Abstract

The present invention relates to a pipe assembly. The pipe assembly includes: a plurality of pipe unit bodies comprising an inner pipe having an outwardly expanded flange formed at an end, and an outer pipe disposed with an insulation layer laid between itself and the inner pipe due to a gap keeping member; a U-shaped band coupled in a shape surrounding flanges of different pipe unit bodies of the plurality of pipe unit bodies, while kept coupled with the flanges in tight contact; and a ring-shaped packing interposed between the U-shaped band and the flanges to maintain airtightness, wherein the flanges include a first extension part bent in an orthogonal direction crossing from an end of the inner pipe to be extended by a predetermined length, a second extension part bent in an orthogonal direction crossing from an end of the first extension part to be extended by a predetermined length, and a third extension part bent in an orthogonal direction crossing from an end of the second extension part to be extended by a predetermined length. Therefore, the present invention is capable of reducing time and costs for maintenance.

Description

Piping assembly {Stack assembly}

The present invention relates to a piping assembly, and more particularly, to a piping assembly to improve reliability by ensuring airtightness of flanges of different flue air ducts, ie, flange connections of pipes.

In general, in power plants, incinerators, various factories, etc., fuels such as petroleum, coal, and gas are used to burn fuel to obtain necessary energy. The year is provided as

In addition, an exhaust pipe is provided for discharging heat and odor of cooked food to the outside from common exhaust outlets (toilet, kitchen) of apartments or kitchens of restaurants, etc., and exhaust gases are discharged to the outside from various industrial facilities. Piping to do so is provided.

The flue is usually made of stainless steel or galvanized steel, and the air duct is made of galvalume and G1 galvanized steel. And, in order to prevent smoke and condensation water from being discharged to the outside through the fastening part, it is manufactured in a form having a heat insulating structure.

Hereinafter, all piping, such as the flue air duct, etc. will be collectively referred to as piping and described.

1 shows a pipe assembly for discharging exhaust gas (combustion gas) generated by a boiler and a generator in a general building and common exhaust operation to the outside.

Referring to FIG. 1 , the piping assembly may be composed of a horizontal piping assembly 10 and a vertical piping assembly 20 depending on the installed state, and the horizontal piping assembly 10 and the vertical piping assembly 20 ) is fixedly installed by the fixed supports 40 and 60 installed in parallel directions, respectively.

In the pipe assembly having such a configuration, a chimney cap 30 is installed at the front end side, an inspection hole 50 for internal inspection is formed in the middle portion, and an expansion part 80 for varying the length of the pipe assembly may also be installed.

Since this piping assembly is connected to a very long length from the boiler 70 to the chimney, that is, the chimney cap 30, it is almost impossible to manufacture it as a single product. After individually manufacturing piping units of a certain length, they are airtightly connected. and install it.

Therefore, at the ends of each piping unit, outwardly extended flanges are formed to be airtightly coupled with other piping units, and by coupling using these flanges, the horizontal piping assembly 10 and the vertical piping assembly 20 are connected. This will install the piping assembly.

However, in the prior art, in order to airtightly couple different piping units, flanges that are in contact with each other are coupled, and a separate band is coupled around the flanges, and then caulking is performed in the gap with silicon or the like to completely seal it. In the case of such a pipe assembly, as it is continuously exposed to high temperatures, the silicone caulking portion may be damaged due to deterioration, and accordingly, there is a problem in that airtight performance is deteriorated.

As described above, when the silicone caulking area is damaged and the airtightness is deteriorated, the operator has to perform post-work such as separating the flange joint of the piping units connected to each other and performing the silicone caulking operation again, so that according to the maintenance Cost and time-consuming problems have been raised.

Korean Patent Publication No. 10-2009-0073822 (2009.07.03.) Korean Patent Registration No. 10-1648312 (2016.08.08.)

The present invention has been made in view of the above problems, and the technical problem to be solved by the present invention is to maintain airtightness by interposing a packing having excellent heat resistance at the flange connection portion of the different piping units, disassembly and It is to provide a piping assembly that facilitates maintenance by reassembly.

In addition, another technical problem to be solved by the present invention is to reduce the thermal conductivity transmitted to the packing by improving the flange shape of the different piping unit units and ensuring airtightness through a packing having excellent heat resistance in the flange of the improved shape. It is to provide a piping assembly that can extend its service life according to the instructions and eventually reduce the time and cost of maintenance.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

A piping assembly according to an embodiment of the present invention for solving the above problems is an inner pipe having an outwardly extended flange formed at an end thereof, and an outer pipe disposed with a heat insulating layer of a certain space interposed therebetween by the inner pipe and the spacer. Including a plurality of piping units consisting of, among the plurality of piping units, in a state in which they are closely coupled to the flanges of different piping units, a U-shaped band wrapped around the flange and coupled to the flange, and the U-shaped band A ring-shaped packing interposed in the flange to maintain airtightness, wherein the flange includes a first extension portion bent in a direction perpendicular to the intersecting end of the inner tube and extending by a predetermined length; It may be composed of a second extension portion bent in a perpendicular direction intersecting from an end portion and extending by a predetermined length, and a third extension portion bent in a perpendicular direction intersecting the end portion of the second extension portion and extending a predetermined length.

At this time, the first extension part and the third extension part of the flange form parallel directions, and the circumference of the inner tube and the second extension part form parallel directions in parallel, and the second extension part and the third extension part of the flange form parallel directions. An accommodating space is formed between the extensions, and the packing can be accommodated in the accommodating space.

In addition, the U-shaped band has a circular ring shape, and may include a bent portion that wraps while pressurizing the flange and the packing, and a close contact portion extending in parallel directions at both ends of the bent portion.

Here, a convex portion may be formed to protrude inward of the bent portion, or a protrusion may be formed to protrude inward from an inner surface of the bent portion.

Other specific details of the invention are included in the detailed description and drawings.

According to the piping assembly according to the embodiment of the present invention, since airtightness is maintained by interposing a packing having excellent heat resistance at the flange connection portion of the different piping units, the effect of facilitating maintenance by disassembly and reassembly can be provided. .

In addition, according to the piping assembly according to an embodiment of the present invention, the flange shape of the different piping unit units is improved, and a packing having excellent heat resistance is interposed in the improved flange to ensure airtightness, so that the thermal conductivity transmitted to the packing is reduced. As the service life is extended, the effect of reducing the time and cost of maintenance can also be provided.

Effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a configuration diagram schematically showing a conventional general pipe assembly configuration;
2 is an exploded perspective view showing a coupling relationship between different piping unit units in a piping assembly such as a conventional flue air duct;
Figure 3 is a partial combined cross-sectional view of Figure 2;
Figure 4 is a partial cross-sectional view showing a coupling relationship between different pipe units in the pipe assembly according to the first embodiment of the present invention.
5 is a partial cross-sectional view showing a coupling relationship between different piping unit units in a piping assembly according to a second embodiment of the present invention.
6 is a partial cross-sectional view showing a coupling relationship between different pipe units in a pipe assembly according to a third embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Thus, in some embodiments, well-known processing steps, well-known structures, and well-known techniques have not been described in detail in order to avoid obscuring the interpretation of the present invention.

Terms used in this specification are for describing embodiments and are not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. The terms "comprises" and/or "comprising" as used in the specification do not preclude the presence or addition of one or more other components, steps and/or operations other than those mentioned. use as And "and/or" includes each and every combination of one or more of the recited items.

In addition, the embodiments described in this specification will be described with reference to perspective views, cross-sectional views, side views and/or schematic views, which are ideal exemplary views of the present invention. Accordingly, the shape of the illustrative drawings may be modified due to manufacturing techniques and/or tolerances. Therefore, embodiments of the present invention are not limited to the specific shapes shown, but also include changes in shapes generated according to manufacturing processes. In addition, in each drawing shown in the embodiment of the present invention, each component may be shown somewhat enlarged or reduced in consideration of convenience of explanation.

Hereinafter, piping assemblies according to embodiments of the present invention will be described in detail based on the accompanying exemplary drawings.

Prior to describing the piping assembly according to embodiments of the present invention, an air duct assembly for a flue (Patent No. 10-1939190), which was previously filed and registered by the applicant of the present invention, will be described in order to help the understanding of the present invention.

FIG. 2 is an exploded perspective view showing a coupling relationship between different piping unit units in a conventional piping assembly such as an air duct for a flue, and FIG. 3 is a partially coupled cross-sectional view of FIG. 2 .

As shown in FIGS. 2 and 3 , the conventional pipe assembly is composed of a plurality of pipe units 100 and a band portion for airtightly coupling the plurality of pipe units 100 .

Here, the plurality of piping units 100 are composed of an inner tube 110, an outer tube 130, and a spacer 140 for maintaining a distance between the inner tube 110 and the outer tube 130. and they are joined by welding.

The inner pipe 110 is a cylindrical member that forms the basic frame of the flue, and high-temperature exhaust gas passes through it, and each end has a cross direction to facilitate connection with the other pipe unit 100. The flange 120 is formed in a bent outwardly extended form.

In addition, the outer tube 130 is a cylindrical member having a larger diameter than the inner tube 110, and the heat insulating layer 170 is formed in the space between the inner tube 110 and the inner tube 110. At this time, a separate heat insulating member is inserted into the space where the heat insulating layer 170 is formed to increase the heat insulating effect.

The outer tube 130 has a groove that is concave inward on the end side, and when different pipe units 100 are coupled, the cover member 160 through the grooves of the outer tubes 130 adjacent to each other. The ends of are inserted and connected.

Therefore, in a state in which the different pipe unit units 100 are coupled, the heat insulation layer 180 is also formed in the inner space of the cover member 160.

The band portion has a substantially V-shaped cross section and is interposed between a V-shaped band 150 forming a circular ring shape, and the V-shaped band 150 and the flange 120 of the piping unit 100 to form the piping unit 100 ) It is configured to include an O-ring-shaped packing 200 for preventing leakage of exhaust gas through the connecting portion.

The V-shaped band 150 constituting the band part has a circular ring shape having a substantially V-shaped cross section, and coupling holes 156 are formed at both ends connected to each other, and through the coupling holes 156, bolts and By fastening a coupling member such as a nut, the flanges 120 of the different piping units 100 are wrapped around and fixedly coupled.

The V-shaped band 150 is formed to extend in parallel directions at both ends of the bent portion 152 forming a V shape so as to surround the flange 120 protruding outward, and the bent portion 152 to form a spacer ( 140) or a close contact part 154 that is in close contact with the outer surface of the end side of the pipe unit 100 or is minutely spaced apart by a predetermined interval.

The packing 200 is interposed between the outer surface of the flange 120 of the pipe unit 100 and the inner surface of the bent portion 152 of the V-shaped band 150 to maintain airtightness. In a state in which the flanges 120 of the units 100 are closely connected, the outer surface of the flange 120 of the pipe unit 100 and the inner surface of the bent portion 152 of the V-shaped band 150 are interposed as a pair on both sides. intervene

In this way, the different pipe units 100 are coupled according to the close contact of the flange 120, and after placing the packing 200 on the outer surface side of each flange 120, respectively, as a V-shaped band 150 When the V-shaped band 150 is tightened with bolts and nuts after wrapping the coupled flanges 120, the different piping units 100 are fixed in a coupled state, and at this time, the piping units 100 connected to each other Even if some of the exhaust gas passing through the flanges 120 leaks into the bent portion 152 of the V-shaped band 150 through the joint portion, airtightness is maintained by the packing 200 so that it is not discharged to the outside. .

However, in the case of the conventional pipe assembly described above, although the effect of maintaining airtightness is excellent, as the pair of packings 200 are disposed adjacent to the inner tube 110 through which the high-temperature exhaust gas passes, the packing ( 200) could be deteriorated by high temperature, shortening the lifespan.

That is, as the pair of packings 200 directly receive heat from the high-temperature exhaust gas passing through the inner tube 110, the lifespan of the packings 200 is reduced, so there is a concern that airtightness may not be maintained for a long time.

Accordingly, the present invention is to provide a piping assembly that can further dramatically reduce time and cost for maintenance by extending its service life as the thermal conductivity transmitted to the packing is reduced, which will be described as follows.

In describing the piping assembly according to the embodiments of the present invention, the same reference numerals will be given to the same parts as in the prior art, and repeated descriptions thereof will be omitted.

4 is a partial cross-sectional view showing a coupling relationship between different piping unit units in the piping assembly according to the first embodiment of the present invention.

As shown in FIG. 4, the pipe assembly according to the first embodiment of the present invention may be composed of a plurality of pipe units 100 and a band portion for airtightly coupling the plurality of pipe units 100. .

Here, the plurality of piping units 100 are composed of an inner tube 110, an outer tube 130, and a spacer 140 for maintaining a distance between the inner tube 110 and the outer tube 130. and they can be joined by welding.

The inner pipe 110 is a cylindrical member that forms the basic skeleton of the pipe, and high-temperature exhaust gas passes through it, and each end has a cross direction to facilitate connection with the other pipe unit 100. The flange 120 may be formed in a bent outwardly extended form.

At this time, the flange 120 is bent in a right angle direction intersecting from the end of the inner tube 110 and extending by a predetermined length, and the first extension 122 intersects from the end of the first extension 122. A second extension part 124 bent in a right angle direction and extended by a predetermined length, and a third extension part 126 bent in a right angle direction intersecting from an end of the second extension part 124 and extended by a predetermined length can be configured.

Therefore, the first extension part 122 and the third extension part 126 of the flange 120 form a parallel direction, and the circumference of the inner tube 110 and the second extension part 124 also form a parallel direction. will be achieved

At this time, when the different pipe unit units 100 are placed side by side and brought into close contact with each other, the first extensions 122 of the flanges 120 come into close contact, and thus the third extensions 126 The space is spaced apart by the length of the second extensions 124, and an accommodation space is formed between the second extensions 124 and the third extensions 126 of the flanges 120. In the receiving space, a unitary packing 300 to be described later is accommodated, which will be described in detail later.

The band portion is interposed between a U-shaped band 150 having a substantially U-shaped cross section and a circular ring shape, and an accommodation space formed between the U-shaped band 150 and the flange 120 of the pipe unit 100, It may be configured to include a ring-shaped packing 300 for preventing exhaust gas from leaking through connection portions of the pipe unit units 100.

Here, the packing 300 is preferably a rubber material having an elastic deformation force, and more preferably, a rubber material having excellent heat resistance performance may be applied.

As described above, the U-shaped band 150 constituting the band part has a circular ring shape having a substantially U-shaped cross section, and coupling holes are formed at both ends connected to each other, and bolts and nuts are formed through the coupling holes. By fastening coupling members such as the like, the flange 120 and the packing 300 of the different pipe units 100 can be fixedly coupled while surrounding them.

The U-shaped band 150 includes a flange 120 protruding outward and a bent portion forming a U-shape or a V-shape so as to pressurize and wrap the packing 300 accommodated in the accommodation space of the flange 120, and the amount of the bent portion. It is formed to extend in a direction parallel to the end and may be configured as a close contact portion spaced apart by a predetermined interval or in close contact with the outer surface of the end side of the spacer 140 or the pipe unit 100.

For reference, in the drawing for supporting the embodiment of the present invention, the close contact portion of the U-shaped band 150 is shown in close contact with the spacer 140, but the length of the spacer 140 is formed short In this case, of course, it may be disposed in direct contact with the outer surface of the piping unit 100.

In this way, the different pipe units 100 are coupled according to the close contact of the flanges 120, that is, the close contact of the first extension portions 122 of the flanges 120, formed by the coupling of each flange 120. After inserting the packing 300 into the accommodation space, wrap the packing 300 inserted into the accommodation space of the coupled flanges 120 as a U-shaped band 150, and then tighten the U-shaped band 150 with bolts and nuts. In this case, the different piping units 100 are fixed in a coupled state, and at this time, some of the exhaust gas passing through the piping units 100 connected to each other is a coupling part of the flanges 120, that is, the first extension part. (122) through between the U-shaped band 150, even if leaked to the bent portion of the packing 300 is airtight is maintained by the discharge is not made to the outside.

In particular, the packing 300 is inserted into the receiving space of the flanges 120 and is disposed at a position spaced apart from the inner tube 110 by the length of the first extension parts 122, so that the high temperature passing through the inner tube 110 Since heat is not directly transferred from the exhaust gas, deterioration does not occur even during long-term use, so the service life is increased, and accordingly, the effect of maintaining confidentiality for a long period of time can be provided.

Of course, as in the prior art, the gap between the U-shaped band 150 and the close contact portion and the gap retaining member (! 40), or the gap between the close contact portion of the U-shaped band 150 and the outer surface of the pipe unit 100, is separately Since airtightness is maintained without performing a silicon caulking operation, the effect of facilitating maintenance by disassembly and reassembly can be provided, of course.

On the other hand, Figure 5 is a partial cross-sectional view showing the coupling relationship of different pipe units in the pipe assembly according to the second embodiment of the present invention.

In describing the pipe assembly according to the second embodiment of the present invention, the same reference numerals are assigned to the same parts as in the first embodiment described above, and repeated description thereof will be omitted.

As shown in Figure 5, the pipe assembly according to the second embodiment of the present invention, by improving the shape of the U-shaped band 150, to further improve the airtight performance of the packing 300.

That is, the bent portion of the U-shaped band 150 may have a structure in which the convex portion 152 is formed so as to protrude inward so as to press the packing 300 more effectively.

Accordingly, the U-shaped band 150 may have an approximately M-shaped cross-section due to the configuration of the convex portion 152 protruding toward the inside of the bent portion, and at this time, the flange 120 is formed by the convex portion 152. ) The packing 300 inserted into the accommodating space is pressurized to increase the density in the accommodating space, so that the airtight performance can be further improved.

That is, due to the increase in the pressing force on the packing 300 by the convex part 152 of the U-shaped band 150, the packing 300 is further expanded in the accommodation space, the first extension part 122 The gap between the bars and the gap between the U-shaped band 150 and the third extension 126 are more effectively shielded, so that the airtight performance can be further improved.

On the other hand, Figure 6 is a partial cross-sectional view showing the coupling relationship of different pipe units in the pipe assembly according to the third embodiment of the present invention.

In describing the pipe assembly according to the third embodiment of the present invention, the same reference numerals are assigned to the same parts as those in the first and second embodiments described above, and repeated descriptions thereof will be omitted. .

As shown in FIG. 6, the pipe assembly according to the third embodiment of the present invention also improves the shape of the U-shaped band 150 to further improve the airtight performance of the packing 300.

That is, a structure in which a protruding portion 154 is formed so as to protrude inward to more effectively press the packing 300 on the inner side of the bent portion of the U-shaped band 150 may be formed.

Therefore, in the U-shaped band 150, the packing 300 inserted into the accommodation space of the flanges 120 is pressed by the protrusion 154 protruding on the inner surface side of the bent portion, so that the density in the accommodation space increases, Confidential performance can be further improved.

That is, due to the increased pressing force on the packing 300 by the protrusion 154 of the U-shaped band 150, the packing 300 is further expanded in the accommodation space, and the first extension parts 122 The gap between the bars and the gap between the U-shaped band 150 and the third extension 126 are more effectively shielded, so that the airtight performance can be further improved.

For reference, in the embodiments of the present invention, it has been described as an example that the band portion includes the U-shaped band 150, but the U-shaped band 150 is one embodiment showing one shape, provided that it is formed of a V-shaped band make it clear that it could be

Those skilled in the art to which the present invention pertains will understand that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the present invention is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention. do.

100: piping unit 110: inner pipe
120: flange 122: first extension
124: second extension 126: third extension
130: outer tube 140: gap maintaining material
150: U-shaped band 152: convex portion
154: protrusion 160: cover member
300: Packing

Claims (5)

Including a plurality of piping units composed of an inner tube having an outwardly extended flange formed at an end thereof, and an outer tube disposed with a heat insulation layer of a certain space interposed between the inner tube and a spacer,
Among the plurality of piping units, a U-shaped band coupled in a state of wrapping around the flanges in a state of being closely coupled to the flanges of different piping units;
Including a ring-shaped packing interposed between the U-shaped band and the flange to maintain airtightness,
The flange is
A first extension portion bent in a perpendicular direction intersecting the end of the inner tube and extending by a predetermined length;
A second extension portion bent in a perpendicular direction intersecting from the end of the first extension portion and extending by a predetermined length;
A pipe assembly, characterized in that composed of a third extension portion bent in a perpendicular direction intersecting from the end of the second extension portion and extending by a predetermined length.
According to claim 1,
The first extension and the third extension of the flange are in parallel and parallel directions, and the circumference of the inner tube and the second extension are also in parallel,
An accommodation space is formed between the second extension part and the third extension part of the flange, characterized in that the packing is accommodated in the accommodation space.
According to claim 1,
The U-shaped band,
A bent portion formed in a circular ring shape and surrounding the flange and the packing while pressing;
A pipe assembly, characterized in that composed of a close contact portion formed to extend in a direction parallel to both ends of the bent portion.
According to claim 3,
A pipe assembly, characterized in that the convex portion is formed to protrude inward of the bent portion.
According to claim 3,
A pipe assembly, characterized in that a protrusion is formed on the inner surface of the bent portion to protrude inward.

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