JPH08285208A - Damping support structure of boiler - Google Patents

Damping support structure of boiler

Info

Publication number
JPH08285208A
JPH08285208A JP8676995A JP8676995A JPH08285208A JP H08285208 A JPH08285208 A JP H08285208A JP 8676995 A JP8676995 A JP 8676995A JP 8676995 A JP8676995 A JP 8676995A JP H08285208 A JPH08285208 A JP H08285208A
Authority
JP
Japan
Prior art keywords
steel frame
boiler
supporting steel
vibration
vibration damping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP8676995A
Other languages
Japanese (ja)
Inventor
Manabu Fujishiro
学 藤城
Jun Hirai
潤 平井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP8676995A priority Critical patent/JPH08285208A/en
Publication of JPH08285208A publication Critical patent/JPH08285208A/en
Withdrawn legal-status Critical Current

Links

Abstract

PURPOSE: To provide a damping support structure of a boiler to increase the reduction effect of an earthquake response and reduce the weight of a support steel frame therealong by increasing a vibration mass exerted on a vibration damping device, in a damping support device for a boiler by a support steel frame. CONSTITUTION: A vibration damping device 8 is installed between a boiler body 2 and a support steel frame 1 and vibration damping devices 10, 12, and 14 are installed between an attendant apparatus, such as a denitrating device 4 and an air heater 5, and a support steel frame. Further, a resilient substance, such as lamination rubbers 9, 11, and 13 is placed between the attendant apparatus and the support steel frame, and the attendant apparatus is also functioned as a vibration mass serving to the vibration damping device.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、発電用石炭焚きボイ
ラ、重油焚きボイラ等、支持鉄骨に支持された大型ボイ
ラの制振支持構造に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping support structure for a large boiler supported by a supporting steel frame such as a coal-fired boiler for power generation and a heavy oil-fired boiler.

【0002】[0002]

【従来の技術】発電用石炭焚きボイラ、重油焚きボイラ
等の大型ボイラは、通常脱硝装置、エアヒータ等の附帯
機器とともに支持鉄骨に取付けて支持されている。
2. Description of the Related Art Large boilers such as coal-fired boilers for power generation and heavy oil-fired boilers are usually attached to and supported by a supporting steel frame together with auxiliary equipment such as a denitration device and an air heater.

【0003】図4(a),(b)には、かかる発電用石
炭焚き大型ボイラ及び附帯機器の支持構造の従来の1例
の側面図が示されている。図4(a)において1は支持
鉄骨、2はボイラ本体であり、同ボイラ本体2は支持鉄
骨1の略中央部にこれの頂部から複数本の吊り棒6によ
り吊下されることにより鉛直方向に支持されている。
FIGS. 4 (a) and 4 (b) are side views of a conventional example of such a supporting structure for a large-sized coal-fired boiler for power generation and auxiliary equipment. In FIG. 4 (a), 1 is a supporting steel frame, 2 is a boiler main body, and the boiler main body 2 is vertically suspended by being suspended from the top of the supporting steel frame 1 by a plurality of suspension rods 6 in the vertical direction. Supported by.

【0004】3は支持鉄骨1の前部に配設されたコール
バンカー、4及び5は支持鉄骨1の後部に配設された脱
硝装置及びエアヒータである。これらの附帯機器3,
4,5は支持鉄骨1を構成する水平方向の梁1b上の支
持鉄骨1の前部及び後部に載置、固定されている。
Reference numeral 3 denotes a coal bunker arranged in the front part of the supporting steel frame 1, and 4 and 5 are denitration devices and air heaters arranged in the rear part of the supporting steel frame 1. These accessories 3,
Numerals 4 and 5 are placed and fixed on the front and rear portions of the supporting steel frame 1 on the horizontal beam 1b constituting the supporting steel frame 1.

【0005】上記支持鉄骨1は、鉛直方向の柱1a、水
平方向の梁1b、柱1aと梁1bとの節部を結合する鉛
直ブレース1c及び水平ブレース1d(詳細は後述)か
ら構成され、鉛直方向の自重や水平方向の地震力に耐え
る構造となっている。
The supporting steel frame 1 is composed of a vertical column 1a, a horizontal beam 1b, a vertical brace 1c for connecting the nodes of the columns 1a and 1b, and a horizontal brace 1d (details will be described later). It has a structure that can withstand the weight of the direction and seismic force in the horizontal direction.

【0006】7は上記ボイラ本体2と支持鉄骨1との間
に複数個介装された水平方向の振れ止め機構である。こ
の振れ止め機構7は地震発生時にボイラ本体2が水平方
向に大きく振れることができるよう、剛性の低い支持構
造となっている。
Reference numeral 7 denotes a horizontal steady rest mechanism which is interposed between the boiler body 2 and the supporting steel frame 1. The steady rest mechanism 7 has a support structure with low rigidity so that the boiler main body 2 can largely swing horizontally when an earthquake occurs.

【0007】即ち、図4(b)に示されるように、上記
振れ止め機構7は、ボイラ本体2から突設された片持ち
梁状の柔構造のビーム7aを支持鉄骨1に設けられた爪
部7bにて挟み込むような構造となっている。
That is, as shown in FIG. 4 (b), the steady rest mechanism 7 has a cantilever-like beam 7 a projecting from the boiler body 2 and having a flexible structure. The structure is such that it is sandwiched between the portions 7b.

【0008】さらに、支持鉄骨1とボイラ本体2との間
には、油圧ダンバ等の振動減衰装置8が複数個介装さ
れ、地震発生時に同減衰装置8により支持鉄骨1とボイ
ラ本体2との変位の差(相対変位)を利用して振動エネ
ルギを吸収するようになっている。
Further, a plurality of vibration damping devices 8 such as hydraulic dampers are interposed between the supporting steel frame 1 and the boiler body 2, and the supporting steel frame 1 and the boiler body 2 are connected by the damping device 8 when an earthquake occurs. Vibration energy is absorbed by utilizing the difference in displacement (relative displacement).

【0009】一方、コールバンカー3、脱硝装置4、エ
アヒータ5等の附帯機器は支持鉄骨1の梁1b上に載置
されボルトにて固定されている。
On the other hand, auxiliary equipment such as the coal bunker 3, the denitration device 4, and the air heater 5 are placed on the beam 1b of the supporting steel frame 1 and fixed by bolts.

【0010】上記のように構成された支持鉄骨1を含む
ボイラ支持構造における装置の総重量に対する重量割合
は、概ねボイラ本体2=20%、コイルバンカー3=2
0%、脱硝装置4=6%、エアヒータ5=4%、支持鉄
骨1その他の付属物=50%程度である。
The weight ratio of the apparatus in the boiler supporting structure including the supporting steel frame 1 constructed as described above to the total weight of the apparatus is about 20% for the main body of the boiler and 3 = 2 for the coil bunker.
0%, denitration device 4 = 6%, air heater 5 = 4%, supporting steel frame 1 and other accessories = about 50%.

【0011】以上のように構成されたボイラの支持構造
において、地震発生時には、振れ止め機構7により支持
鉄骨1に支持されたボイラ本体2は、支持鉄骨1に対し
て大きく変位して両者間に大きな相対変位を生じ、この
相対変位による振動エネルギを支持鉄骨1とボイラ本体
2との間に介装した振動減衰装置8により吸収する。こ
れにより、装置全体の減衰能が向上し、地震応当性が低
減される。
In the boiler support structure constructed as described above, when an earthquake occurs, the boiler main body 2 supported by the supporting steel frame 1 by the steady rest mechanism 7 is largely displaced with respect to the supporting steel frame 1 and is located between the two. A large relative displacement is generated, and the vibration energy due to this relative displacement is absorbed by the vibration damping device 8 interposed between the supporting steel frame 1 and the boiler body 2. This improves the damping capacity of the entire device and reduces the seismic response.

【0012】[0012]

【発明が解決しようとする課題】上記のような従来のボ
イラの支持構造にあっては、地震発生時において、上記
のように、装置全体重量の約20%の重量を有するボイ
ラ本体2を振れ止め機構7により水平支持することによ
りボイラ本体2を積極的に変位(振動)させ、同振れ止
め機構7と併設された振動減衰装置8にて振動エネルギ
を吸収し、地震応答を低減せしめている。
In the conventional boiler supporting structure as described above, when an earthquake occurs, as described above, the boiler main body 2 having a weight of about 20% of the total weight of the apparatus is shaken. The boiler main body 2 is positively displaced (vibrated) by being horizontally supported by the stop mechanism 7, and the vibration energy is absorbed by the vibration damping device 8 provided together with the steady rest mechanism 7 to reduce the seismic response. .

【0013】この地震応答の低減効果は、変位させる
(振動させる)重量物の重量が重くなる程向上する。し
かるに、上記従来のボイラ支持構造にあっては、上記の
通り、装置全体の20%程度であるボイラ本体2の質量
のみを使用していることから、地震応答低減効果を向上
せしめるには質量面から限界があった。
The effect of reducing the seismic response increases as the weight of the heavy object to be displaced (vibrated) becomes heavier. However, in the above-mentioned conventional boiler support structure, as described above, only the mass of the boiler main body 2, which is about 20% of the entire apparatus, is used. Therefore, in order to improve the seismic response reduction effect, the mass surface can be improved. There was a limit.

【0014】本発明の目的は、振動減衰装置に加わる振
動質量を増加せしめることにより、地震応答の低減効果
を増大せしめるとともに、これに伴い支持鉄骨の軽量化
が実現されたボイラの制振支持構造を提供することであ
る。
The object of the present invention is to increase the vibration mass applied to the vibration damping device, thereby increasing the effect of reducing the seismic response, and at the same time, reducing the weight of the supporting steel frame. Is to provide.

【0015】[0015]

【課題を解決するための手段】本発明は、水平方向の振
れ止め機構を介して支持鉄骨に支持されたボイラ本体と
支持鉄骨との間に振動減衰装置を介装するとともに、支
持鉄骨上に載設された脱硝装置、エアヒータ等の附帯機
器と支持鉄骨との間にも振動減衰装置を介装し、さら
に、附帯機器と支持鉄骨との間には積層ゴム等の弾性体
を介装して、附帯機器も振動減衰装置に加わる振動質量
として機能するように構成したことを要旨とするもので
ある。上記振動減衰装置は、油圧ダンパ、ダッシュポッ
ト等公知のものを用いる。
SUMMARY OF THE INVENTION According to the present invention, a vibration damping device is interposed between a boiler main body supported by a supporting steel frame through a horizontal steady rest mechanism and the supporting steel frame, and the supporting steel frame is mounted on the supporting steel frame. A vibration damping device is also installed between the supporting steel frame and auxiliary equipment such as a denitration device and an air heater, and an elastic body such as laminated rubber is installed between the auxiliary equipment and the supporting steel frame. In addition, the gist is that the auxiliary equipment is also configured to function as a vibration mass applied to the vibration damping device. As the vibration damping device, known devices such as a hydraulic damper and a dashpot are used.

【0016】[0016]

【作用】本発明は上記のように構成されているので、地
震発生時には、ボイラ本体とともに独立した振動質量と
なった附帯機器も振動することとなって従来のものより
も振動減衰装置に作用する振動質量が大幅に増加し、振
動エネルギの吸収量が増大する。これにより地震応答低
減効果が増大せしめられる。
Since the present invention is configured as described above, when an earthquake occurs, the auxiliary equipment, which has become an independent vibrating mass, vibrates together with the boiler body, and acts on the vibration damping device more than the conventional one. The vibrating mass is greatly increased and the amount of vibration energy absorbed is increased. This will increase the seismic response reduction effect.

【0017】[0017]

【実施例】以下図面を参照して本発明の実施例を詳細に
説明する。図1には本発明の実施例に係る発電用石炭焚
きボイラの制振支持構造が示され、図2には図1の平面
図(A−A線視図)が示されている。
Embodiments of the present invention will now be described in detail with reference to the drawings. 1 shows a vibration damping support structure for a coal-fired boiler for power generation according to an embodiment of the present invention, and FIG. 2 shows a plan view (a line AA view) of FIG.

【0018】図1,2において1は支持鉄骨、2はボイ
ラ本体であり、同ボイラ本体2は支持鉄骨1の略中央部
にこれの頂部から複数本の吊り棒6により吊下されるこ
とにより鉛直方向に支持されている。
In FIGS. 1 and 2, 1 is a supporting steel frame, 2 is a boiler main body, and the boiler main body 2 is suspended from the top of the supporting steel frame 1 by a plurality of suspension rods 6 from the top thereof. It is supported vertically.

【0019】上記支持鉄骨1は、鉛直方向に延びる柱1
a、水平方向に延びる梁1b、柱1aと梁1bとの節部
を結合する鉛直ブレース1c及び水平ブレース1dから
構成され、鉛直方向の自重や水平方向の地震力に耐える
構造となっている。
The supporting steel frame 1 is a column 1 extending in the vertical direction.
a, a beam 1b extending in the horizontal direction, a vertical brace 1c connecting the nodes of the columns 1a and 1b, and a horizontal brace 1d, and has a structure capable of withstanding its own weight in the vertical direction and seismic force in the horizontal direction.

【0020】7は上記ボイラ本体2と支持鉄骨1との間
に複数個介装された水平方向の振れ止め機構である。こ
の振れ止め機構7は地震発生時にボイラ本体2が水平方
向に大きく振れることができるよう、剛性の低い支持構
造となっており、図4(b)に示されるように、上記振
れ止め機構7は、ボイラ本体2から突設された片持ち梁
状の柔構造のビーム7aを支持鉄骨1に設けられた爪部
7bにて挟み込むように構成されている。
Reference numeral 7 denotes a horizontal steady rest mechanism which is interposed between the boiler body 2 and the supporting steel frame 1. The steady rest mechanism 7 has a supporting structure with low rigidity so that the boiler main body 2 can largely swing horizontally when an earthquake occurs. As shown in FIG. 4B, the steady rest mechanism 7 is The cantilever beam 7a having a flexible structure protruding from the boiler main body 2 is sandwiched by the claw portions 7b provided on the supporting steel frame 1.

【0021】8は支持鉄骨1とボイラ本体2との間に複
数個介装された油圧ダンパ等の振動減衰装置であり、支
持鉄骨1とボイラ本体2との間の水平方向変位の差(相
対変位)を利用して振動エネルギを吸収する。同振動減
衰装置は油圧ダンパ、ダッシュポット等公知のものを用
いる。
Reference numeral 8 denotes a vibration damping device such as a hydraulic damper provided between the supporting steel frame 1 and the boiler main body 2, and a difference in horizontal displacement between the supporting steel frame 1 and the boiler main body 2 (relative Displacement) is used to absorb vibration energy. As the vibration damping device, known devices such as a hydraulic damper and a dashpot are used.

【0022】以上の構成は図4に示される従来のものと
同様である。
The above construction is similar to the conventional one shown in FIG.

【0023】3は支持鉄骨1の前部に配設されたコール
バンカー、4及び5は支持鉄骨1の後部に配設された脱
硝装置及びエアヒータである。
Reference numeral 3 denotes a coal bunker provided in the front portion of the supporting steel frame 1, and 4 and 5 are denitration devices and air heaters provided in the rear portion of the supporting steel frame 1.

【0024】上記コールバンカー3、脱硝装置4、エア
ヒータ5は支持鉄骨1の水平方向梁1b上に積層ゴム
9,11,13を介して載置されている。この積層ゴム
9,11,13は、上記各附帯機器3,4,5の静的安
定性を確保することを考慮すると、各機器の隅部4箇所
に挿設する(図2参照)のが好適である。
The coal bunker 3, the denitration device 4, and the air heater 5 are mounted on the horizontal beam 1b of the supporting steel frame 1 via laminated rubbers 9, 11, and 13. In consideration of ensuring the static stability of each of the accessory devices 3, 4, and 5, the laminated rubbers 9, 11, and 13 should be installed at four corners of each device (see FIG. 2). It is suitable.

【0025】また、上記積層ゴム9,11,13は、建
築物の免震構造で採用されているもので、鉛直方向には
高い剛性と大きな荷重負荷能力を持つとともに、水平方
向には柔軟な剛性と大きな水平方向変形能を持つもので
ある。
The laminated rubbers 9, 11 and 13 are used in the seismic isolation structure of a building and have a high rigidity in the vertical direction and a large load-bearing capacity, while being flexible in the horizontal direction. It has rigidity and large horizontal deformability.

【0026】尚上記積層ゴム9,11,13に代えて、
ばね、単一材のゴムパッド等の弾性体を用いてもよい。
In place of the laminated rubbers 9, 11, 13 described above,
An elastic body such as a spring or a single material rubber pad may be used.

【0027】上記各附帯機器3,4,5の底部と支持鉄
骨1の梁との間には、油圧ダンパ等からなる振動減衰装
置10,12,14が介装される。これらの振動減衰装
置10,12,14は、各機器の捩れの発生を防止する
ため、各機器の両側に配置される。
Between the bottoms of the auxiliary devices 3, 4, 5 and the beam of the supporting steel frame 1, vibration damping devices 10, 12, 14 including hydraulic dampers are provided. These vibration damping devices 10, 12, 14 are arranged on both sides of each device in order to prevent the occurrence of twisting of each device.

【0028】上記のように構成されたボイラの支持構造
において、地震発生時には支持鉄骨1に水平方向の振れ
止め機構7及び振動減衰装置8を介して支持されたボイ
ラ本体2、並びに支持鉄骨1に積層ゴム9,11,13
及び振動減衰装置10,12,14を介して支持された
コールバンカー3、脱硝装置4、エアヒータ5は、支持
鉄骨1に対しこれよりも大きな相対変位で以って振動す
る。
In the boiler supporting structure constructed as described above, when an earthquake occurs, the boiler main body 2 supported by the supporting steel frame 1 through the horizontal steady rest mechanism 7 and the vibration damping device 8 and the supporting steel frame 1 are supported. Laminated rubber 9, 11, 13
The coal bunker 3, the denitration device 4, and the air heater 5, which are supported via the vibration damping devices 10, 12, and 14, vibrate with respect to the supporting steel frame 1 with a relative displacement larger than this.

【0029】この振動系の質量は、ボイラ本体2とコー
ルバンカー3、脱硝装置4及びエアヒータ5とを加えた
質量であり、図4に示される従来の振動系即ちボイラ本
体2のみが振動系として作用する振動系の2.5倍の質
量を有する。これにより、振動エネルギーの吸収効果が
向上する。
The mass of this vibration system is the mass of the boiler main body 2, the coal bunker 3, the denitration device 4 and the air heater 5, and only the conventional vibration system shown in FIG. It has 2.5 times the mass of the vibrating system that acts. This improves the effect of absorbing vibration energy.

【0030】上記の現象を図3(a)〜(c)を使用し
て詳しく説明する。
The above phenomenon will be described in detail with reference to FIGS.

【0031】図3(a)は固有振動特性を求めるため
に、ボイラ本体2、コールバンカー3、脱硝装置4、エ
アヒータ5と支持鉄骨1との間の支持構造を単純にモデ
ル化したものである。
FIG. 3 (a) is a simple model of the support structure between the boiler body 2, the call bunker 3, the denitration device 4, the air heater 5 and the support steel frame 1 in order to obtain the natural vibration characteristic. .

【0032】即ち、支持鉄骨1を等価なビーム要素と集
中質量1mで、ボイラ本体2を等価なビーム要素と集中
質量2mで、コールバンカー3、脱硝装置4、エアヒー
タ5についても同様に等価なビーム要素と集中質量3
m,4m,5mでモデル化している。
That is, the supporting steel frame 1 has an equivalent beam element and a concentrated mass of 1 m, the boiler body 2 has an equivalent beam element and a concentrated mass of 2 m, and the call bunker 3, the denitration device 4, and the air heater 5 have the same equivalent beam. Element and concentrated mass 3
It is modeled with m, 4m, and 5m.

【0033】また、支持鉄骨とボイラ本体2間を結合す
る振れ止め機構7をバネ要素7で、支持鉄骨1とコール
バンカー3、脱硝装置4、エアヒータ5を結合する積層
ゴム9,11,13を同じくバネ要素9,11,13で
モデル化している。
Further, the steady rest 7 for connecting the supporting steel frame and the boiler main body 2 is a spring element 7, and the laminated rubbers 9, 11, 13 for connecting the supporting steel frame 1, the call bunker 3, the denitration device 4, and the air heater 5 together. Similarly, the spring elements 9, 11, 13 are modeled.

【0034】次に図3(b)(c)は、図3(a)のモ
デルに対して固有振動計算を行った場合の、計算結果を
模式的に示したものである。
Next, FIGS. 3 (b) and 3 (c) schematically show the calculation results when the natural vibration calculation is performed on the model of FIG. 3 (a).

【0035】図3(b)は1次振動の振動モードを示し
ており、支持鉄骨1とボイラ本体2、コールバンカー
3、脱硝装置4およびエアヒータ5は同一方向に動いて
おり、かつ支持鉄骨1の変位に対してボイラ本体2や附
帯機器7の変位が大きく、支持鉄骨1との間に大きな相
対変位を生じる振動モードとなる。
FIG. 3B shows the vibration mode of the primary vibration, in which the supporting steel frame 1, the boiler body 2, the call bunker 3, the denitration device 4 and the air heater 5 are moving in the same direction, and the supporting steel frame 1 The displacement of the boiler main body 2 and the auxiliary equipment 7 is large with respect to the displacement of 1, and the vibration mode becomes a large relative displacement with the supporting steel frame 1.

【0036】図3(c)は、同じく2次振動の振動モー
ドを示しており、支持鉄骨1とボイラ本体2、コールバ
ンカー3、脱硝装置4およびエアヒータ5は逆の方向に
変位し、1次振動と同様に、支持鉄骨1との間に大きな
相対変位を生じる振動モードとなる。
FIG. 3 (c) also shows the vibration mode of the secondary vibration, in which the supporting steel frame 1, the boiler body 2, the call bunker 3, the denitration device 4 and the air heater 5 are displaced in the opposite directions, and the primary vibration occurs. Similar to the vibration, the vibration mode causes a large relative displacement with the supporting steel frame 1.

【0037】この傾向は、図示しないが高次振動でも同
様であり、いずれも支持鉄骨1とボイラ本体2や附帯機
器3,4,5の間に大きな相対変位を生じる振動モード
となる。
Although not shown, this tendency also applies to higher-order vibrations, and both of them are vibration modes in which a large relative displacement is generated between the supporting steel frame 1 and the boiler main body 2 and the auxiliary equipments 3, 4 and 5.

【0038】この様な固有振動特性を持つため、地震発
生時にも支持鉄骨1と、ボイラ本体2及びコールバンカ
ー3、脱硝装置4、エアヒータ5の間には大きな相対変
位を生じることとなる。
Due to such natural vibration characteristics, even when an earthquake occurs, a large relative displacement occurs between the supporting steel frame 1, the boiler body 2, the call bunker 3, the denitration device 4, and the air heater 5.

【0039】この際において、併設した減衰装置8,1
0,12,14により地震により供給される振動エネル
ギが吸収され、構造全体の減衰性が向上し、地震応答が
大きく低減される。即ち、支持鉄骨1に作用する地震水
平力が低減されることにより、支持鉄骨1の柱1a、梁
1b、鉛直ブレース1cに作用する力が減少することに
より、これら部材の断面を小さくすることができ、経済
的なボイラ制振支持構造を得ることができる。
At this time, the damping devices 8 and 1 provided side by side
The vibration energy supplied by the earthquake is absorbed by 0, 12, and 14, the damping property of the entire structure is improved, and the seismic response is greatly reduced. That is, the horizontal earthquake force acting on the supporting steel frame 1 is reduced, and the forces acting on the columns 1a, the beams 1b, and the vertical braces 1c of the supporting steel frame 1 are reduced, so that the cross-sections of these members can be reduced. It is possible to obtain an economical boiler vibration damping support structure.

【0040】[0040]

【発明の効果】以上のように本発明によれば、ボイラ本
体と支持鉄骨との間に振動減衰装置を介装するととも
に、脱硝装置、エアヒータ等の附帯機器と支持鉄骨との
間にも振動減衰装置を介装し、さらに、附帯機器と支持
鉄骨との間には積層ゴム等の弾性体を介装したので、地
震発生時には、独立した振動質量となった附帯機器が独
立した振動質量であるボイラ本体とともに振動すること
となり、従来のものに較べて振動減衰装置に作用する振
動質量が大幅に増加する。
As described above, according to the present invention, the vibration damping device is interposed between the boiler body and the supporting steel frame, and the vibration is also generated between the supporting steel frame and auxiliary equipment such as a denitration device and an air heater. Since a damping device was installed and an elastic body such as laminated rubber was installed between the auxiliary equipment and the supporting steel frame, when the earthquake occurred, the auxiliary equipment became an independent vibrating mass. Since it vibrates together with a certain boiler body, the vibrating mass acting on the vibration damping device is significantly increased as compared with the conventional one.

【0041】これにより、振動エネルギーの吸収量が増
大し、支持構造全体の減衰性能が著しく向上することに
より、支持鉄骨に発生する地震荷重を確実に低減するこ
とができる。
As a result, the amount of vibration energy absorbed is increased and the damping performance of the entire support structure is significantly improved, so that the seismic load generated on the support steel frame can be reliably reduced.

【0042】また、支持鉄骨に作用する地震水平力が低
減されることにより、支持鉄骨の構成部材を薄肉、軽量
化することが可能となり、低コストのボイラ支持構造を
得ることができる。
Further, since the seismic horizontal force acting on the supporting steel frame is reduced, it is possible to make the constituent members of the supporting steel frame thin and lightweight, and it is possible to obtain a low cost boiler supporting structure.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例に係る発電用石炭焚きボイラの
制振支持構造を示す構成図。
FIG. 1 is a configuration diagram showing a vibration damping support structure of a coal-fired boiler for power generation according to an embodiment of the present invention.

【図2】図1のA−A矢視図(平面図)。FIG. 2 is a view (plan view) taken along the line AA of FIG.

【図3】上記実施例における振動減衰作用説明図。FIG. 3 is an explanatory view of a vibration damping action in the above embodiment.

【図4】従来例を示す図1応答図。FIG. 4 is a response diagram of FIG. 1 showing a conventional example.

【符号の説明】[Explanation of symbols]

1 支持鉄骨 2 ボイラ本体 3 コールバンカー 4 脱硝装置 5 エアヒータ 7 振れ止め機構 8,10,12,14 振動減衰装置 9,11,13 積層ゴム 1 Support Steel Frame 2 Boiler Main Body 3 Coal Bunker 4 Denitration Device 5 Air Heater 7 Steady Stop Mechanism 8, 10, 12, 14 Vibration Damper 9, 11, 13 Laminated Rubber

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ボイラ本体を水平方向の振れ止め機構を
介して支持鉄骨に支持し、脱硝装置、エアヒータ等の附
帯機器を上記支持鉄骨上に載設してなるボイラの支持構
造において、上記ボイラ本体と支持鉄骨との間に油圧ダ
ンパ等の振動減衰装置を上記振れ止め機構と併設し、上
記附帯機器と支持鉄骨との間に油圧ダンパ等の振動減衰
装置及び積層ゴム等の弾性体を介装したことを特徴とす
るボイラの制振支持構造。
1. A boiler support structure in which a boiler main body is supported by a supporting steel frame through a horizontal steadying mechanism, and auxiliary equipment such as a denitration device and an air heater is mounted on the supporting steel frame. A vibration damper such as a hydraulic damper is installed between the main body and the supporting steel frame together with the steady rest mechanism, and a vibration damper such as a hydraulic damper and an elastic body such as laminated rubber are interposed between the auxiliary equipment and the supporting steel frame. Boiler damping support structure characterized by being equipped.
JP8676995A 1995-04-12 1995-04-12 Damping support structure of boiler Withdrawn JPH08285208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8676995A JPH08285208A (en) 1995-04-12 1995-04-12 Damping support structure of boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8676995A JPH08285208A (en) 1995-04-12 1995-04-12 Damping support structure of boiler

Publications (1)

Publication Number Publication Date
JPH08285208A true JPH08285208A (en) 1996-11-01

Family

ID=13895966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8676995A Withdrawn JPH08285208A (en) 1995-04-12 1995-04-12 Damping support structure of boiler

Country Status (1)

Country Link
JP (1) JPH08285208A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007063941A (en) * 2005-09-02 2007-03-15 Mitsubishi Heavy Ind Ltd Aseismic support structure of boiler
JP2008127791A (en) * 2006-11-17 2008-06-05 Mitsubishi Heavy Ind Ltd Seismic-control repair method for existing truss steel-frame building
CN103267084A (en) * 2013-06-04 2013-08-28 中国船舶重工集团公司第七○二研究所 Three-dimensional frame type buoyant raft vibration isolation device
JP2015121045A (en) * 2013-12-24 2015-07-02 三菱日立パワーシステムズ株式会社 Boiler support structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007063941A (en) * 2005-09-02 2007-03-15 Mitsubishi Heavy Ind Ltd Aseismic support structure of boiler
JP2008127791A (en) * 2006-11-17 2008-06-05 Mitsubishi Heavy Ind Ltd Seismic-control repair method for existing truss steel-frame building
CN103267084A (en) * 2013-06-04 2013-08-28 中国船舶重工集团公司第七○二研究所 Three-dimensional frame type buoyant raft vibration isolation device
JP2015121045A (en) * 2013-12-24 2015-07-02 三菱日立パワーシステムズ株式会社 Boiler support structure

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