JP2008002393A - Straightening grid for exhaust and exhaust duct with the straightening grid - Google Patents

Straightening grid for exhaust and exhaust duct with the straightening grid Download PDF

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JP2008002393A
JP2008002393A JP2006173889A JP2006173889A JP2008002393A JP 2008002393 A JP2008002393 A JP 2008002393A JP 2006173889 A JP2006173889 A JP 2006173889A JP 2006173889 A JP2006173889 A JP 2006173889A JP 2008002393 A JP2008002393 A JP 2008002393A
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exhaust duct
exhaust
leg
rectifying grid
plate
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JP4714093B2 (en
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Taizo Kashiwazaki
泰三 柏崎
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Toshiba Corp
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Toshiba Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a straightening grid for exhaust with the aim of reducing a thrust load exerted on a slide surface of a straightening grid to eliminate occurrence of deformation or crack, thus preventing a damage to the slide surface. <P>SOLUTION: Straightening grids for exhaust are provided, within an internal heat insulating type exhaust duct 1 comprised of an outer plate 4a and an inner plate 4b sandwiching a heat insulating material 11 therebetween, on surfaces orthogonal to a center axis in its duct extending direction, and the peripheral sections of which are engaged by engaging members 21 attached on locations as appropriate of the exhaust duct 1. In a supporting device of the straightening grid for exhaust, a plurality of legs 8 are attached and fixed onto the bottom section of the straightening grid 2, and these legs 8 are inserted through leg insertion holes 9 provided by penetrating through the inner plate 4b and the heat insulating material 11, respectively, as well as being supported slidably relative to heat elongation of the outer plate 4a of the bottoms of leg insertion holes. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えばコンバインドサイクル発電設備のガスタービンから排出される排気ガスを排熱回収ボイラへ導く内部保温式排気ダクトに設置される排気用整流格子および整流格子付き排気ダクトに関する。   The present invention relates to an exhaust rectifier grid and an exhaust duct with a rectifier grid installed in an internally insulated exhaust duct that guides exhaust gas discharged from, for example, a gas turbine of a combined cycle power generation facility to an exhaust heat recovery boiler.

例えば、コンバインドサイクル発電設備においては、図３に示すようにガスタービン設備のガスタービン３から排出される排気ガス７を、内部保温式排気ダクト１を通して排熱回収ボイラ１２に導いて蒸気タービン設備の熱エネルギーとして利用した後、煙突１３を通して大気５に排出している。そして、内部保温式排気ダクト１内には、その中心軸と直交する面に排気ガスの流れ方向に適宜の間隔を存して複数の整流格子２が設けられ、排気ガスの乱れた流れを整流し、流速が均一になるようにしている（例えば、特許文献１参照）。   For example, in the combined cycle power generation facility, as shown in FIG. 3, the exhaust gas 7 discharged from the gas turbine 3 of the gas turbine facility is led to the exhaust heat recovery boiler 12 through the internal heat insulation type exhaust duct 1 to After being used as thermal energy, it is discharged to the atmosphere 5 through the chimney 13. A plurality of rectifying grids 2 are provided in the internal heat insulation type exhaust duct 1 on the surface orthogonal to the central axis with appropriate intervals in the flow direction of the exhaust gas to rectify the turbulent flow of the exhaust gas. However, the flow velocity is made uniform (see, for example, Patent Document 1).

ところで、このようなコンバインドサイクル発電設備において、上記内部保温式排気ダクト１は、図４に示すように保温材１１を挟んで外板４ａと内板４ｂとを設けたものであり、この排気ダクト１内に設けられる整流格子２としては、複数本の横桟２ａを適宜の間隔を存して平行に配置すると共に、複数本の縦桟２ｂを適宜の間隔を存して平行に且つ各横桟２ａに交差させて配置し、これら横桟２ａおよび縦桟２ｂにより形成された格子状の窓に金網１４もしくは薄い板材を格子状にした部材１４を配設した構成のものが用いられている。   By the way, in such a combined cycle power generation facility, the internal heat insulating exhaust duct 1 is provided with an outer plate 4a and an inner plate 4b with a heat insulating material 11 interposed therebetween as shown in FIG. As the rectifying grid 2 provided in 1, a plurality of horizontal bars 2 a are arranged in parallel at an appropriate interval, and a plurality of vertical bars 2 b are arranged in parallel at an appropriate interval and in each horizontal direction. A structure in which a wire mesh 14 or a member 14 made of a thin plate material in a lattice shape is arranged in a lattice-like window formed by the cross rails 2a and the vertical rails 2b is used. .

従来、この整流格子２を内部保温式排気ダクト１内に支持するには、図４に示す如く排気ダクト１の底面部分の外板４ａに、先端部を排気ガス通路側に露出させて垂直に取付け固定された複数の支持台６の上に整流格子２を載置し、この整流格子２の外周囲部を排気ダクト１の上面および底面の例えば適宜３箇所と両側面の適宜１箇所の外板４ａに取付け固定された係合部材２１の排気ガス通路側に露出する係合部にそれぞれ係合させて、高温環境下に置かれる整流格子２の熱伸びに対して自由自在な支持構造としていた。
実開平０６−６９３３８号公報 Conventionally, in order to support the rectifying grid 2 in the internal heat insulation type exhaust duct 1, as shown in FIG. 4, the front end portion is exposed to the exhaust gas passage side on the outer plate 4 a of the bottom surface of the exhaust duct 1 and vertically. The rectifying grid 2 is placed on a plurality of mounting bases 6 that are fixedly mounted, and the outer peripheral portion of the rectifying grid 2 is placed outside, for example, three places on the top and bottom surfaces of the exhaust duct 1 and one place on both sides. As a support structure that is freely engaged with the thermal expansion of the rectifying grid 2 placed in a high-temperature environment by engaging with the engaging portions exposed to the exhaust gas passage side of the engaging member 21 attached and fixed to the plate 4a. It was.
Japanese Utility Model Publication No. 06-69338

しかし、このような支持構造で排気ダクト１内に整流格子２を支持させると、プラント運転中にあっては排気ダクト１の底面部の外板４ａが外気に晒されて温度が低く、熱伸び量が小さいため、排気ダクト１の底面部の外板４ａに取付け固定されている支持台６の移動量が小さいのに対して、整流格子２は高温の排気ガス７に晒されて高温となり、熱伸び量が大きくなるため、支持台６と整流格子２との間に熱伸び差が生じる。   However, when the rectifying grid 2 is supported in the exhaust duct 1 with such a support structure, the outer plate 4a on the bottom surface of the exhaust duct 1 is exposed to the outside air during plant operation, the temperature is low, and the thermal elongation is increased. Since the amount is small, the amount of movement of the support 6 attached to and fixed to the outer plate 4a on the bottom surface of the exhaust duct 1 is small, whereas the rectifying grid 2 is exposed to high temperature exhaust gas 7 and becomes high temperature. Since the amount of thermal elongation increases, a difference in thermal elongation occurs between the support base 6 and the rectifying grid 2.

したがって、整流格子２は熱伸びに対して自由自在な構造であるため、支持台６の上をスライドするが、一般に金属材料どうしにおける高温環境下での滑り摩擦係数は大きくなる性質がある。よって熱伸びによる移動時のスライド荷重が大きくなるため、排気ダクト１の底面側に対応する整流格子２の横桟２ａや縦桟２ｂに変形１８や割れ１７が発生したり、スライド面１５が損傷したりする事故が発生していた。   Therefore, since the rectifying grid 2 has a structure that is free from thermal expansion, the rectifying grid 2 slides on the support base 6, but generally has a property that the sliding friction coefficient in a high-temperature environment between metal materials becomes large. Therefore, since the slide load during movement due to thermal elongation increases, deformation 18 or crack 17 occurs in the horizontal beam 2a or vertical beam 2b of the rectifying grid 2 corresponding to the bottom surface side of the exhaust duct 1, or the slide surface 15 is damaged. Accidents occurred.

本発明は、上記のような事情に鑑みてなされたもので、排気ダクトの底面部にスライド可能に支持される整流格子のスライド面の摩擦係数を小さくして横桟や縦桟の変形や割れの発生を防止できる排気用整流格子および整流格子付き排気ダクトを提供することを目的とする。   The present invention has been made in view of the above circumstances, and it is possible to reduce the friction coefficient of the sliding surface of the rectifying grid that is slidably supported on the bottom surface portion of the exhaust duct to deform or crack the horizontal beam or the vertical beam. It is an object of the present invention to provide an exhaust rectifying grid and an exhaust duct with a rectifying grid that can prevent the occurrence of the above.

本発明は、上記の目的を達成するため、保温材を挟んで外板と内板とで構成される内部保温式排気ダクト内にそのダクト延長方向中心軸と直交する面上に設置され、且つ周囲部を前記排気ダクトの適宜箇所に取付けられた係合部材により係合される排気用整流格子において、前記整流格子の底面部に複数の脚を取付け固定し、これらの脚を前記排気ダクトの底面部の内板および保温材を貫通させて設けられた脚挿入穴部にそれぞれ挿入すると共に、該脚挿入穴部底面となる前記排気ダクトの外板に熱伸びに対してスライド可能に支持する。   In order to achieve the above object, the present invention is installed on a surface orthogonal to the central axis of the duct extension direction in an internal heat insulation type exhaust duct composed of an outer plate and an inner plate with a heat insulating material interposed therebetween, and In an exhaust rectifying grid that is engaged by an engaging member attached to an appropriate location of the exhaust duct, a plurality of legs are attached and fixed to the bottom surface of the rectifying grid, and these legs are fixed to the exhaust duct. The bottom plate is inserted into the leg insertion hole provided through the inner plate and the heat insulating material, and is supported on the outer plate of the exhaust duct serving as the bottom of the leg insertion hole so as to be slidable against thermal expansion. .

さらに、本発明は、上記目的を達成するため、外板と、その内側に配設される内板と、前記外板とこの内板との間に設置される保温材とで構成される内部保温式排気ダクトであって、この排気ダクト内部には、このダクトの延長方向中心軸と直交する面上にその周囲部を前記排気ダクトの適宜箇所に取付けられた係合部材により係合された排気用整流格子を格納した整流格子付き排気ダクトにおいて、前記排気ダクトの底面部内板および保温材の、前記排気用整流格子の底面部に設けられた脚と対向する位置に、前記脚が挿入される脚挿入穴部を設けるとともに、この脚挿入穴部の近傍領域の前記排気ダクト外板には放熱板を設けた。   Furthermore, in order to achieve the above-mentioned object, the present invention provides an internal structure composed of an outer plate, an inner plate disposed inside the outer plate, and a heat insulating material installed between the outer plate and the inner plate. A heat insulation type exhaust duct, and the inside of the exhaust duct is engaged with an engagement member attached to an appropriate portion of the exhaust duct on a surface orthogonal to the central axis in the extension direction of the duct. In the exhaust duct with a rectifying grid storing the exhaust rectifying grid, the leg is inserted at a position of the bottom plate of the exhaust duct and the heat insulating material facing the leg provided on the bottom surface of the exhaust rectifying grid. Leg insertion holes are provided, and a heat radiating plate is provided on the outer plate of the exhaust duct in the vicinity of the leg insertion holes.

本発明によれば、排気ダクトの底面部にスライド可能に支持される整流格子のスライド面の摩擦係数を小さくしてスライド荷重を小さくすることで、整流格子の底面部における横桟や縦桟の変形や割れの発生を防止することができる。   According to the present invention, the sliding coefficient is reduced by reducing the friction coefficient of the sliding surface of the rectifying grid that is slidably supported on the bottom surface of the exhaust duct, thereby reducing the horizontal and vertical beams on the bottom of the rectifying grid. Deformation and cracking can be prevented.

以下本発明の実施形態について図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は本発明による排気用整流格子の支持装置の第１の実施形態を示す正面図で、図４と同一部分には同一符号を付してその説明を省略し、ここでは異なる部分について述べる。   FIG. 1 is a front view showing a first embodiment of a support device for an exhaust rectifying grid according to the present invention. The same parts as those in FIG. .

第１の実施形態では、図１に示すように整流格子２の底面部の図示左右両側に脚８を溶接により鉛直に取付け固定すると共に、これら両脚８間の中央に固定脚２３を溶接により鉛直に取付け固定する構成とし、これら両脚８および固定脚２３を排気ダクト１の底面部の内板４ｂおよび保温材１１を貫通させて設けられた脚挿入穴部１９および２２にそれぞれ挿入する構成とするものである。   In the first embodiment, as shown in FIG. 1, the legs 8 are vertically attached and fixed to the left and right sides of the bottom of the rectifying grid 2 by welding as shown in FIG. The two legs 8 and the fixed legs 23 are inserted into the leg insertion holes 19 and 22 provided through the inner plate 4b and the heat insulating material 11 on the bottom surface of the exhaust duct 1, respectively. Is.

この場合、脚挿入穴部１９は脚８との間に適宜の隙間１９ａが存する大きさに形成され、また脚挿入穴部２２は固定脚２３より若干大きく形成されている。   In this case, the leg insertion hole 19 is formed to have a size with an appropriate gap 19 a between the leg 8 and the leg insertion hole 22 is formed to be slightly larger than the fixed leg 23.

したがって、整流格子２は、脚挿入穴部２２に挿入された固定脚２３により排気ダクト１の中心軸に対して直交する面上に固定され、脚挿入穴部１９に挿入された脚８は、排気ダクト１の外板４ａ上に載置された状態となっている。   Therefore, the rectifying grid 2 is fixed on a surface orthogonal to the central axis of the exhaust duct 1 by the fixed legs 23 inserted into the leg insertion holes 22, and the legs 8 inserted into the leg insertion holes 19 are The exhaust duct 1 is placed on the outer plate 4a.

また、整流格子２の周囲部は、図４と同様に排気ダクト１の上面および底面の例えば適宜３箇所と両側面の適宜１箇所の外板４ａに取付け固定された係合部材２１の排気ガス通路側に露出する係合部にそれぞれ係合される。   Further, the peripheral portion of the rectifying grid 2 is the exhaust gas of the engaging member 21 that is attached and fixed to the outer plate 4a at, for example, three appropriate locations on the top and bottom surfaces of the exhaust duct 1 and one appropriate location on both side surfaces as in FIG. It is engaged with the engaging part exposed to the passage side.

このような構成の排気用整流格子の支持装置において、プラント運転中は排気ダクト１の底面部の外板４ａが外気に晒されて温度が低いことから熱伸び量が小さく、これに対して整流格子２は高温の排気ガス７に晒されて高温となり、熱伸び量が大きくなるため、整流格子２に取付け固定された脚８と外板４ａとの間に熱伸び差を生じる。   In the support device for the exhaust rectification grid having such a configuration, during the plant operation, the outer plate 4a on the bottom surface of the exhaust duct 1 is exposed to the outside air and the temperature is low. Since the grid 2 is exposed to the high-temperature exhaust gas 7 and becomes high temperature, and the amount of thermal expansion increases, a difference in thermal expansion occurs between the legs 8 attached and fixed to the rectifying grid 2 and the outer plate 4a.

この脚８と外板４ａとの間に熱伸び差が生じると、脚８は脚挿入穴１９との間に間隙１９ａを存して挿入されて外板４の上に載せられているだけの熱伸び自由構造になっているため、脚８は固定脚２３を起点に外板４ａ上をスライドするが、外板４ａは温度が低いため、高温環境下と比べて滑り摩擦係数は小さくなっている。   When a difference in thermal expansion occurs between the leg 8 and the outer plate 4a, the leg 8 is inserted with a gap 19a between the leg insertion hole 19 and placed on the outer plate 4. The leg 8 slides on the outer plate 4a with the fixed leg 23 as the starting point because it has a free structure for thermal expansion. However, since the outer plate 4a has a low temperature, the sliding friction coefficient is smaller than that in a high temperature environment. Yes.

従って、滑り摩擦係数が小さくので、脚８と外板４ａとは比較的自由に摺動が可能となり、脚８に負荷されるスライド荷重は低減される。その結果、整流格子２と脚８の接合部分のスライド荷重によって負荷される応力も低減される。そして、整流格子２自体もその底面部は比較的自由に熱膨張が可能となる。よって、排気ダクト１の底面部側に対応する整流格子２の横桟２ａや縦桟２ｂが変形や割れが発生したり、スライド面が損傷したりする事故を防止することができる。   Accordingly, since the sliding friction coefficient is small, the leg 8 and the outer plate 4a can slide relatively freely, and the sliding load applied to the leg 8 is reduced. As a result, the stress applied by the slide load at the joint between the rectifying grid 2 and the legs 8 is also reduced. The bottom surface of the rectifying grid 2 itself can be relatively thermally expanded. Therefore, it is possible to prevent an accident in which the horizontal beam 2a or the vertical beam 2b of the rectifying grid 2 corresponding to the bottom surface side of the exhaust duct 1 is deformed or cracked, or the slide surface is damaged.

図２は本発明の第２の実施形態を示す正面図で、図１と同一部分には同一符号を付してその説明を省略し、ここでは異なる部分について述べる。   FIG. 2 is a front view showing a second embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals, the description thereof is omitted, and different parts will be described here.

第２の実施形態では、図２に示すように整流格子２に取付け固定された脚８に対応する排気ダクト１の脚挿入穴部１９の底面となる外板４ａ上に滑り摩擦係数の小さな特性を有するスライド板９を設ける構成とするものである。このようなスライド板９の例として、通常の金属板にＳｉＣ、ＴｉＮ、Ｓｉ３Ｎ４などセラミックスコーティングを施工したもの、通常の金属板にＣｒやＭｏなどの合金金属をメッキや蒸着等で施工したものなどが挙げられる。   In the second embodiment, as shown in FIG. 2, the sliding friction coefficient has a small characteristic on the outer plate 4a serving as the bottom surface of the leg insertion hole 19 of the exhaust duct 1 corresponding to the leg 8 attached and fixed to the rectifying grid 2. It is set as the structure which provides the slide plate 9 which has. Examples of such a slide plate 9 include a normal metal plate coated with a ceramic coating such as SiC, TiN, Si3N4, a normal metal plate plated with an alloy metal such as Cr or Mo, etc. Is mentioned.

このような構成とすれば、整流格子２に取付け固定された脚８と外板４ａとの間に熱伸び差を生じると、脚８は滑り摩擦係数の小さな特性を有するスライド板９の上をスライド面１５としてスライドするため、第１の実施形態と比べてスライド荷重をより小さくすることができる。   With such a configuration, when a difference in thermal expansion occurs between the leg 8 attached and fixed to the rectifying grid 2 and the outer plate 4a, the leg 8 moves over the slide plate 9 having a small coefficient of sliding friction. Since the slide surface 15 slides, the slide load can be reduced as compared with the first embodiment.

また、上記第２の実施形態において、排気ダクト１に設けられた脚挿入穴部１９および２２に対応する外板４ａの大気側に放熱板１０をそれぞれ取付ける構成とするものである。   Moreover, in the said 2nd Embodiment, it is set as the structure which attaches the heat sink 10 to the air | atmosphere side of the outer plate | board 4a corresponding to the leg insertion holes 19 and 22 provided in the exhaust duct 1, respectively.

このような構成とすれば、脚８とスライド板９とのスライド面１５に伝わる熱が放熱板１０を介して大気側に放熱されるので、スライド面１５の温度をさらに低くすることが可能となり、滑り摩擦係数をさらに小さくすることができる。また、スライド面１５を低温にすることで、高温環境下では使用することができなかった耐熱温度の低い非金属系のスライド板９を使用することが可能である。このようなスライド板９の例として、代表的なものがテフロン（登録商標）樹脂などが挙げられる。   With such a configuration, the heat transmitted to the slide surface 15 between the leg 8 and the slide plate 9 is dissipated to the atmosphere side through the heat radiating plate 10, so that the temperature of the slide surface 15 can be further lowered. The sliding friction coefficient can be further reduced. Further, by making the slide surface 15 low in temperature, it is possible to use a non-metallic slide plate 9 having a low heat resistant temperature that could not be used in a high temperature environment. A typical example of such a slide plate 9 is Teflon (registered trademark) resin.

さらに、上記第２の実施形態において、排気ダクト１に設けられた脚挿入穴部１９の開口端の上面に対応する整流格子２の脚８の周囲部に脚８と共にスライド移動する遮熱用内板２０を設け、また脚挿入穴部１９の開口端近傍の穴径を広げてこの部分に遮熱用保温材１６を設ける構成とする。   Furthermore, in the second embodiment described above, the heat shielding inner part that slides together with the legs 8 around the legs 8 of the rectifying grid 2 corresponding to the upper surface of the opening end of the leg insertion hole 19 provided in the exhaust duct 1. The plate 20 is provided, and the diameter of the hole in the vicinity of the opening end of the leg insertion hole 19 is widened, and the heat insulating material 16 is provided in this portion.

このような構成とすれば、脚８廻りの隙間１９ａから排気ダクト１の底面部の外板４ａへの熱伝導を防止して排気ダクト１の底面部の外板４ａの温度を下げる効果があり、スライド面１５の温度をさらに低くすることが可能となり、滑り摩擦係数をさらに小さくすることができる。   With this configuration, heat conduction from the gap 19a around the leg 8 to the outer plate 4a on the bottom surface of the exhaust duct 1 is prevented, and the temperature of the outer plate 4a on the bottom surface of the exhaust duct 1 is reduced. The temperature of the slide surface 15 can be further lowered, and the sliding friction coefficient can be further reduced.

なお、上記第２の実施形態に放熱板１０を設けたり、遮熱用内板２０および遮熱用保温材１６を設けたりする場合について述べたが、第１の実施形態に放熱板１０を設けたり、遮熱用内板２０および遮熱用保温材１６を設けたりしても良いことは言うまでもない。   In addition, although the case where the heat sink 10 is provided in the second embodiment or the heat shield inner plate 20 and the heat shield 16 are provided, the heat sink 10 is provided in the first embodiment. Needless to say, the heat insulating inner plate 20 and the heat insulating heat insulating material 16 may be provided.

本発明による排気用整流格子の支持装置の第１の実施形態を示す正面図。The front view which shows 1st Embodiment of the support apparatus of the rectification | straightening grid for exhaust_gas | exhaustion by this invention. 本発明による排気用整流格子の支持装置の第２の実施形態を示す正面図。The front view which shows 2nd Embodiment of the support apparatus of the rectification | straightening grid for exhaust_gas | exhaustion by this invention. コンバインドサイクル発電設備における排気系の概略構成図。The schematic block diagram of the exhaust system in a combined cycle power generation equipment. 従来の内部保温式排気ダクトに設置される排気用整流格子の支持構造を示す正面図。The front view which shows the support structure of the rectification | straightening grid for exhaust_gas | exhaustion installed in the conventional internal heat retention type | mold exhaust duct.

符号の説明Explanation of symbols

１…排気ダクト、２…整流格子、２ａ…横桟、２ｂ…縦桟、３…ガスタービン、４ａ…外板、４ｂ…内板、５…大気、７…排気ガス、８…脚、９…スライド板、１０…放熱板、１１…保温材、１２…排熱回収ボイラ、１３…煙突、１４…金網、１５…スライド面、１６…遮熱用保温材、１９，２２…脚挿入穴、１９ａ…隙間、２０…遮熱用内板、２１…係合部材、２３…固定脚   DESCRIPTION OF SYMBOLS 1 ... Exhaust duct, 2 ... Rectification grid, 2a ... Horizontal beam, 2b ... Vertical beam, 3 ... Gas turbine, 4a ... Outer plate, 4b ... Inner plate, 5 ... Air | atmosphere, 7 ... Exhaust gas, 8 ... Leg, 9 ... Slide plate, 10 ... Heat radiator, 11 ... Heat insulation material, 12 ... Exhaust heat recovery boiler, 13 ... Chimney, 14 ... Wire mesh, 15 ... Slide surface, 16 ... Heat insulation heat insulation material, 19, 22 ... Leg insertion hole, 19a ... Gap, 20 ... Inner plate for heat insulation, 21 ... Engaging member, 23 ... Fixed leg

Claims (4)

保温材を挟んで外板と内板とで構成される内部保温式排気ダクト内にその延長方向中心軸と直交する面上に設置され、且つ周囲部を前記排気ダクトの適宜箇所に取付けられた係合部材により係合される排気用整流格子において、
前記整流格子の底面部に複数の脚を取付け固定し、これらの脚を前記排気ダクトの底面部の内板および保温材を貫通させて設けられた脚挿入穴部にそれぞれ挿入すると共に、該脚挿入穴部底面となる前記排気ダクトの外板に熱伸びに対してスライド可能に支持するようにしたことを特徴とする排気用整流格子。 Installed on a surface orthogonal to the central axis in the extension direction in an internal heat insulation type exhaust duct composed of an outer plate and an inner plate with a heat insulating material interposed therebetween, and a peripheral portion attached to an appropriate portion of the exhaust duct In the exhaust rectifying grid engaged by the engaging member,
A plurality of legs are attached and fixed to the bottom surface of the rectifying grid, and these legs are respectively inserted into leg insertion holes provided through the inner plate and the heat insulating material of the bottom surface of the exhaust duct, and the legs An exhaust air rectifying grid, wherein the exhaust duct is slidably supported on the outer plate of the exhaust duct, which is the bottom surface of the insertion hole, with respect to thermal expansion. 請求項１記載の排気用整流格子において、前記脚挿入穴部底面となる排気ダクトの外板と前記脚との間に低摩擦係数を有する材料からなるスライド板を設けたことを特徴とする排気用整流格子。   The exhaust rectifying grid according to claim 1, wherein a slide plate made of a material having a low friction coefficient is provided between an outer plate of an exhaust duct serving as a bottom surface of the leg insertion hole and the leg. Rectifier grid. 外板と、
その内側に配設される内板と、
前記外板とこの内板との間に設置される保温材とで構成される内部保温式排気ダクトであって、
この排気ダクト内部には、このダクトの延長方向中心軸と直交する面上にその周囲部を前記排気ダクトの適宜箇所に取付けられた係合部材により係合された排気用整流格子を格納した整流格子付き排気ダクトにおいて、
前記排気ダクトの底面部内板および保温材の、前記排気用整流格子の底面部に設けられた脚と対向する位置に、前記脚が挿入される脚挿入穴部を設けるとともに、
この脚挿入穴部の近傍領域の前記排気ダクト外板には放熱板を設けたことを特徴とする整流格子付き排気ダクト。 The outer plate,
An inner plate disposed inside thereof,
An internal heat insulation type exhaust duct composed of a heat insulation material installed between the outer plate and the inner plate,
In this exhaust duct, a rectification storing an exhaust rectifying grid that is engaged with an engaging member attached to an appropriate portion of the exhaust duct on a surface perpendicular to the central axis in the extension direction of the duct. In an exhaust duct with a lattice,
In the bottom plate of the bottom part of the exhaust duct and the heat insulating material, a leg insertion hole for inserting the leg is provided at a position facing the leg provided on the bottom part of the exhaust rectifying grid, and
An exhaust duct with a rectifying grid, characterized in that a heat radiating plate is provided on the exhaust duct outer plate in the vicinity of the leg insertion hole. 請求項３に記載の整流格子付き排気ダクトにおいて、
前記脚挿入穴部開口端上面には、前記脚と一緒にスライドする遮熱用内板を設けるとともに、
前記脚挿入穴部は、予め算出された前記脚のスライド量に応じて拡張されるとともに、
その内部には、遮熱用保温材が設けられていることを特徴とする整流格子付き排気ダクト。 The exhaust duct with a rectifying grid according to claim 3,
On the upper surface of the leg insertion hole opening end, a heat shield inner plate that slides together with the leg is provided,
The leg insertion hole is expanded according to the slide amount of the leg calculated in advance,
An exhaust duct with a rectifying grid, characterized in that a heat insulating material is provided therein.
JP2006173889A 2006-06-23 2006-06-23 Exhaust rectifier grid and exhaust duct with rectifier grid Active JP4714093B2 (en)

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EP2752560A4 (en) * 2012-01-30 2015-05-13 Mitsubishi Hitachi Power Sys Silencing device and rotary machine provided with same
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Publication number Priority date Publication date Assignee Title
JP2013007350A (en) * 2011-06-27 2013-01-10 Mitsubishi Heavy Ind Ltd Gas turbine exhaust equipment
KR101732194B1 (en) * 2011-12-29 2017-05-04 현대중공업 주식회사 Funnel for ship having exhaust gas flow straighter and drill ship having the funnel
EP2752560A4 (en) * 2012-01-30 2015-05-13 Mitsubishi Hitachi Power Sys Silencing device and rotary machine provided with same

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