JP3234312U - chimney - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a cylinder as a lining of a tubular heat insulating material by spirally wound thin-walled steel plate, and to join without impairing the absorption function of expansion and contraction exhibited by a joint portion by a chimney joint of the cylinder. It provides a chimney that prevents rainwater and condensed water from entering the inside of the tubular heat insulating material through the section. SOLUTION: The cylinder is made of a thin steel plate wound spirally. The thin steel plates adjacent to each other in the axial direction of the cylinder are connected to each other via a joint portion 50 formed by a spirally extending goby joint. At the joint, the outwardly folded piece 51 and the inwardly folded piece 52 are slidably meshed with each other. The waterproof packing 60 is sandwiched between the meshing portions of the outward and inward folding pieces. [Selection diagram] Fig. 3

Description

The present invention relates to a chimney in which a tubular heat insulating material is lined by a cylinder made of a thin steel plate, and a flue through which exhaust gas flows is formed by the internal space of the cylinder.

This type of chimney is generally constructed by a series of chimney units of a certain length in multiple stages, often in the form of a cylinder lined with a cylinder made of thin steel plate. The outer surface of the heat insulating wall is surrounded from the outside by a cylindrical outer steel plate. In a chimney having such a structure, a cylinder made of a thin steel plate as a lining material and an outer steel plate surrounding a tubular heat insulating wall from the outside prevent a situation in which exhaust gas leaks to the outside of the flue. Not only is it useful for this, but it is also useful for preventing smoke leakage when cracks occur in the tubular heat insulating material due to a load caused by a strong external force such as an earthquake or deterioration over time.

By the way, it is constructed to guide the exhaust gas from large-scale chimneys installed inside the building, such as gas turbine engines and diesel engines that drive emergency generators, boilers, and industrial waste incinerators, to the outside of the building. In the chimney, the rainwater that has entered the flue from the top of the chimney that is open on the roof of the building and the condensed water that has adhered to the thin steel plate as the lining material that forms the flue are tubular for some reason. A situation may occur in which the inside of the heat insulating material is infiltrated. When such a situation occurs, the heat insulating performance may be deteriorated, or the moisture that has entered the inside of the tubular heat insulating material may be heated by the high-temperature exhaust gas to cause a steam explosion phenomenon of the tubular heat insulating material. There is. Here, the "steam explosion phenomenon of the heat insulating material" means that when the moisture that has entered the inside of the heat insulating material is heated by the high-temperature exhaust gas, it boils inside the heat insulating material without evaporating to the outside of the heat insulating material. It is a phenomenon in which the heat insulating material tears or scatters in pieces.

In the preceding example, there is a description of a chimney having a structure in which a stainless steel plate is connected by a goby seam and a spirally wound lining cylinder is inserted into a tubular main body made of a heat insulating material (see Patent Document 1). In Patent Document 1, at the goby seam portion of a stainless steel plate, the lower edge of the upper steel plate is bent outward and upward in a U shape, and the upper edge of the lower steel plate is bent in a U shape. A structure is shown in which the outside is rolled upward from the bottom, bent inward in an inverted U-shape, and rolled up inside the lower edge of the U-shape upward, and this structure allows the inside of the lining cylinder to flow down. Not only does water not flow into the gaps in the goby seams, but the expansion and contraction of the lining cylinder is absorbed by the goby seams, and there is almost no extension of the lining cylinder as a whole to the tubular body, causing inconvenience due to the expansion and contraction of the lining cylinder. It is said that it will almost disappear.

Jitsufuku No. 3-7704

By the way, a chimney has both a vertically drawn portion in which the flue flowing exhaust gas is directed upward and a horizontally drawn portion in which the flue is directed in the horizontal direction and the diagonal direction, and among them. Those that have only one of them are known. Regarding this point, in the chimney described in Patent Document 1 described above, when the chimney is applied to the construction of the vertical pulling portion, the absorption action of the expansion and contraction of the lining cylinder at the goby seam portion is impaired. However, if the chimney is applied to the construction of the horizontal pulling part, it is possible to ensure that the water infiltrates into the goby seam. It has been found that this cannot be prevented, and as a result, moisture may infiltrate into the heat insulating material to deteriorate the heat insulating performance or cause a steam explosion phenomenon of the heat insulating material.

In view of the above circumstances, the present invention has a chimney having a structure in which a tubular heat insulating material is lined with a tubular body made of a thin-walled steel plate. Whether applied to the vertical pulling part or the horizontal pulling part without impairing the absorption action of expansion and contraction exhibited by the joint part, rainwater, condensed water, etc. will pass through the joint part due to the spiral joint of the cylinder. The purpose is to provide a chimney that can reliably prevent the situation of invading the inside of the shape insulating material.

In the chimney according to the present invention, a tubular heat insulating material is formed of a thin-walled steel plate wound in a spiral shape, and the internal space is lined by a tubular body forming an exhaust gas flue. The thin steel plates on the downstream side in the exhaust gas flow direction and the upstream side in the exhaust gas flow direction arranged in the direction are continuously provided via a joint portion formed by a spirally extending haze joint. Then, in the joint portion formed by the goby joint, the outward folded piece portion formed by folding the thin steel plate on the downstream side in the exhaust gas flow direction to the outside and the thin steel plate formed by folding the thin steel plate on the upstream side in the exhaust gas flow direction inward are formed. The facing folding pieces are slidably meshed with each other, and the waterproof packing is sandwiched in the gaps formed at the meshing points of the outward and inward folding pieces.

According to the chimney that adopts this configuration, at the joint part of the cylinder made of spirally wound thin-walled steel plate by the bead joint, the outward folding piece of the thin-walled steel plate on the downstream side in the exhaust gas flow direction and the upstream side in the exhaust gas flow direction. Since the inwardly folded pieces of the thin-walled steel sheet are slidably meshed with each other, the joint portion not only absorbs expansion and contraction, but also rainwater and dew condensation water are tubular heat insulating materials. It also helps prevent the situation of invading the inside of the. In particular, the waterproof packing sandwiched between the meshing points of the outward and inward folding pieces exerts cushioning properties between the inward folding pieces and the outward folding pieces. Not only does it help maintain the stable slidability of the chimney, but whether the chimney is applied to the vertical or horizontal pulling part, rainwater or condensed water infiltrates the inside of the tubular heat insulating material. It helps to prevent the situation of doing so.

In the present invention, it is desirable that the waterproof packing is sandwiched between the edge of the inwardly facing folded piece and the bent portion of the outwardly facing folded piece facing the edge. According to this, the waterproof packing sandwiched in the gap formed at the meshing point between the outward and inward folding pieces slides between the outward folding piece and the inward folding piece. Since the situation of increasing the resistance does not occur, the slidability at the joint portion due to the joint of the cylinder is not impaired by the waterproof packing.

In the present invention, the thin-walled steel plates on the upstream side in the exhaust gas flow direction do not protrude inward from the thin-walled steel plates on the downstream side in the exhaust gas flow direction on both sides of the joint portion by the goby joint. It is desirable to have. According to this, especially when the chimney is applied to the vertically drawn portion, moisture such as rainwater and dew condensation water that runs down the inner surface of the cylinder made of thin steel plate does not enter the joint portion due to the splicing, and the exhaust gas flows. Since the inner surface of the thin-walled steel plate on the downstream side in the direction smoothly flows down to the inner surface of the thin-walled steel plate on the upstream side in the exhaust gas flow direction, the situation where rainwater or dew condensation water infiltrates into the tubular heat insulating material is spliced. It will be effectively prevented by the joint part itself.

In the present invention, it is desirable that the waterproof packing is a glass-based packing or a ceramic-based packing. According to this, the heat resistance and durability of the waterproof packing against the high temperature exhaust gas passing through the flue are satisfactorily exhibited.

In the present invention, it is desirable that the thin-walled steel plate is a stainless steel plate having a thickness of 0.6 to 1.5 mm, and the waterproof packing is a thread-like packing having a diameter of 1 to 5 mm. If the thin-walled steel sheet is a stainless steel sheet with a thickness of 0.6 to 1.5 mm, the force required to spirally wind the thin-walled steel sheet in the process of manufacturing the tubular body is relatively small. Will be easier to manufacture. Further, if a thread-like packing having a diameter of 1 to 5 mm is used for the water-stopping packing, not only is it easy to continuously sandwich the water-stopping packing in the joint portion by the spirally extending haze joint in the process of manufacturing the tubular body, but also the baldness. There is no missing part of the waterproof packing at the joint part by the joint, and the waterproof performance by the waterproof packing is stable.

As described above, according to the present invention, in a chimney having a structure in which a tubular heat insulating material is lined with a tubular body made of a thin-walled steel plate, a tubular body formed of a thin-walled steel plate spirally wound. Rainwater, dew condensation, etc. infiltrate into the inside of the tubular heat insulating material through the joint part of the cylinder without impairing the absorption action of expansion and contraction exhibited by the joint part of the spiral joint. It will surely be prevented. This effect is similarly exerted when the chimney is applied to the vertically pulled portion and the horizontally pulled portion. As a result, the chimney according to the present invention has the ability to prevent rainwater, dew condensation, etc. from entering the inside of the tubular heat insulating material through the joint portion formed by the goby joint of the tubular body. The effect is that it surpasses the chimney proposed by.

It is a partial longitudinal side view which showed explanatoryly showing the chimney which concerns on embodiment of this invention. It is a partial side view which showed the cylinder body as a lining explanatoryly. It is an enlarged end view which showed the joint part by the goby joint explanatoryly.

FIG. 1 is a partial longitudinal side view illustrating the chimney 100 according to the embodiment of the present invention, FIG. 2 is a partial side view illustrating the cylinder 10 as a lining, and FIG. 3 is a joint portion by a goby joint. It is an enlarged end view which showed 50 explanatoryly.

The chimney 100 of the embodiment is installed inside the building and is intended to guide exhaust gas from a gas turbine engine, a diesel engine, a boiler, an industrial waste incinerator, or the like for driving an emergency generator to the outside of the building. Is built.

As shown in FIG. 1, in the chimney 100, the tubular heat insulating material 20 is lined by a cylindrical body 10 made of a thin-walled steel plate, and is surrounded from the outside by a tubular outer steel plate 30. As the thin steel plate forming the cylinder 10, a stainless steel plate having a thickness of 0.6 to 1.5 mm is used, the diameter of which is about 200 to 1500 mm, and the internal space of the cylinder 10 is smoke. It forms the road 11. The tubular heat insulating material 20 includes a zonotrite-based calcium silicate plate which has small heat shrinkage and is remarkably excellent in heat insulating properties, heat resistance, acid resistance, abrasion resistance, etc., as well as rock wool alone or rock wool. It is used in combination in the form of a composite with ceramic fibers and the like. The thickness of the heat insulating material 20 is about 50 to 100 mm. The thickness of the tubular outer steel plate 30 is about 4.5 to 9 mm.

As can be seen from FIG. 1 or 2, the cylindrical body 10 lined with the tubular heat insulating material 20 is formed of a thin-walled steel plate made of a spirally wound stainless steel plate. Then, the thin steel plates on the downstream side in the exhaust gas flow direction (upper side in the figure) and the upstream side in the exhaust gas flow direction (lower side in the figure) arranged in the axial direction of the cylinder 10 are joined by a goby joint extending in a spiral shape. It is connected through 50. In FIG. 3, the joint portion 50 by the goby joint is enlarged and shown explanatoryly. In the joint portion 50 formed by the goby joint, the outward folded piece portion 51 formed by folding the end portion of the thin steel plate on the downstream side (upper side in the figure) in the exhaust gas flow direction to the outside and the upstream side in the exhaust gas flow direction (in the figure example). The inwardly folded piece portion 52 formed by folding the end portion of the thin-walled steel plate (lower side) inward is slidably meshed with each other. Due to this meshing structure, the connecting portion 50 exerts an action of absorbing the expansion and contraction of the tubular body 10. Further, the waterproof packing 60 is sandwiched in the gap formed at the meshing portion between the outward and inward folded piece portions 51 and 52. In the case shown in FIG. 3, the waterproof packing 60 is sandwiched between the edge of the inwardly facing folded piece portion 52 and the bent portion 53 of the outwardly facing folded piece portion 51 facing the edge. However, the sandwiched portion of the waterproof packing 60 is not limited to the illustration, and for example, even if it is a gap between the outward folding piece portion 51 and the inward folding piece portion 52, it is inward. It may be a gap on both sides of the folded piece portion 52. However, if the waterproof packing 60 is sandwiched between the edge of the inwardly facing folded piece portion 52 and the bent portion 53 of the outwardly facing folded piece portion 51 facing the water stop packing 60 as shown in the illustrated example, Since the situation that the waterproof packing 60 does not increase the sliding resistance between the outward folding piece portion 51 and the inward folding piece portion 52 does not occur, the sliding of the tubular body 10 at the joint portion 50 due to the joint The property is not impaired by the waterproof packing 60. Further, it may be sandwiched in other places, for example, in the gap between the outward folding piece portion 51 and the inward folding piece portion 52 or in the gaps on both sides of the inward folding piece portion 52. The waterproof packing 60 has an advantage that it exhibits cushioning properties and maintains stable slidability between the outwardly folded back piece portion 51 and the inwardly folded back piece portion 52.

When the waterproof packing 60 is sandwiched in the gap formed at the meshing portion between the outward and inward folded piece portions 51 and 52 at the joint portion 50 by the goby joint in this way, the inner surface of the tubular body 10 is covered. It is surely prevented that rainwater or dew condensation water flowing along the pipe passes through the joint portion 50 and invades the inside of the tubular heat insulating material 20. Therefore, a phenomenon that can occur when the water vapor that has entered the inside of the tubular heat insulating material 20 is heated by the high-temperature exhaust gas that passes through the flue, specifically, the water vapor evaporates to the outside of the heat insulating material 20. It is possible to reliably avoid the so-called steam explosion phenomenon, in which the water is boiled inside without being split into pieces or scattered. This action is achieved even if the chimney 100 is applied to the vertically pulled portion because the waterproof packing 60 is sandwiched in the gap formed at the meshing portion between the outward and inward folded piece portions 51 and 52. Even if it is applied to the horizontal pulling portion, the situation where rainwater or dew condensation water infiltrates into the tubular heat insulating material can be surely prevented. As the waterproof packing 60, a glass-based packing or a ceramic-based packing having excellent heat resistance and durability can be preferably used.

In this embodiment, the thin-walled steel plates on the upstream side in the exhaust gas flow direction do not protrude inward from the thin-walled steel plates on the downstream side in the exhaust gas flow direction on both sides of the joint portion 50 formed by the goby joint. There is. In this embodiment, as a measure to achieve this condition, the end portion of the thin-walled steel plate on the upstream side in the exhaust gas flow direction is projected outward from the outward folded piece portion 51 formed on the thin-walled steel plate on the downstream side in the exhaust gas flow direction. By doing so, the thin steel plate on the upstream side in the exhaust gas flow direction and the thin steel plate on the downstream side in the exhaust gas flow direction are arranged at a position where they are lined up in the axial direction of the chimney. In this way, rainwater and dew condensation water flowing along the thin-walled steel plate on the downstream side in the exhaust gas flow direction will flow down to the thin-walled steel plate on the upstream side in the exhaust gas flow direction without being stagnant at the joint portion 50, and rainwater and dew condensation water will be combined. The situation in which the exhaust gas passes through the portion 50 and enters the inside of the tubular heat insulating material 20 is surely prevented, and the exhaust gas also smoothly rises in the flue 11.

In this embodiment, since the thin steel plate forming the tubular body 10 is made of a stainless steel plate having a thickness of 0.6 to 1.5 mm that can be easily bent, a joint portion by a spirally extending goby joint is used. 50 can be relatively easily manufactured by machining (sheet metal processing). The tubular body 10 is reinforced by forming a spirally extending linear bulging portion 12 in addition to a joint portion 50 formed by a spirally extending goby joint. Further, a thread-like packing having a diameter of 1 to 5 mm is used for the waterproof packing 60. When a thread-like packing having a diameter of 1 to 5 mm is adopted for the waterproof packing 60 in this way, the waterproof packing 60 is attached to the joint 50 in the step of continuously manufacturing the joint 50 by the spirally extending goby joint by machining. Since it is possible to continuously sandwich the meshing portion, there is an advantage that the joint portion 50 by the spiral joint can be efficiently manufactured.

10 Cylinder 11 Flue 20 Insulation 50 Joint with goby joint 51 Outward folding piece 52 Inward folding piece 53 Outward folding piece bent part 60 Water stop packing 100 Chimney

Claims (5)

The tubular heat insulating material is formed by a thin-walled steel plate wound in a spiral shape, and the internal space is lined by a tubular body forming an exhaust gas flue, and the exhaust gas flow direction arranged in the axial direction in this tubular body. A chimney in which the thin-walled steel plates on the downstream side and the upstream side in the exhaust gas flow direction are continuously provided via a joint portion formed by a spiral joint.
In the joint portion by the goby joint, the outward folding piece formed by folding the thin steel plate on the downstream side in the exhaust gas flow direction to the outside and the inward folding plate formed by folding the thin steel plate on the upstream side in the exhaust gas flow direction inward. A chimney characterized in that one part is slidably meshed with each other and a waterproof packing is sandwiched in a gap formed at a meshing portion between the outward and inwardly folded pieces. The chimney according to claim 1, wherein the waterproof packing is sandwiched in a gap between an end edge of the folded piece portion facing inward and a bent portion of the folded piece portion facing outward. Claims that the thin-walled steel plates on the upstream side in the exhaust gas flow direction do not protrude inward from the thin-walled steel plates on the downstream side in the exhaust gas flow direction on both sides of the joint portion by the goby joint. 1 or the chimney according to claim 2. The chimney according to any one of claims 1 to 3, wherein the waterproof packing is a glass-based packing or a ceramic-based packing. The chimney according to claim 1 to 5, wherein the thin steel plate is made of a stainless steel plate having a thickness of 0.6 to 1.5 mm, and the waterproof packing is made of a thread-like packing having a diameter of 1 to 5 mm.

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