JPH09229266A - Flexible joint device - Google Patents
Flexible joint deviceInfo
- Publication number
- JPH09229266A JPH09229266A JP8062062A JP6206296A JPH09229266A JP H09229266 A JPH09229266 A JP H09229266A JP 8062062 A JP8062062 A JP 8062062A JP 6206296 A JP6206296 A JP 6206296A JP H09229266 A JPH09229266 A JP H09229266A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- insulating material
- seat plate
- bolt
- joint device
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Thermal Insulation (AREA)
- Joints Allowing Movement (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、火力発電所、製鉄
所、ゴミ焼却場等の排ガスダクトや空気ダクト等の熱膨
張や振動を吸収するダクト用フレキシブルジョイント装
置の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a duct flexible joint device for absorbing thermal expansion and vibration of an exhaust gas duct and an air duct of a thermal power plant, a steel mill, a garbage incineration plant and the like.
【０００２】[0002]
【従来の技術】従来、火力発電所、製鉄所、ゴミ焼却場
等の燃焼装置から排出される排ガスを通過させるダクト
系路には、ダクト自体の熱膨張や振動等を吸収する目的
で、ダクト系路の一部に、伸縮可撓性を有する筒状膜体
（例えば特公昭４８−３３２７４号公報参照）を用いて
構成したフレキシブルジョイント装置が設けられてい
る。2. Description of the Related Art Conventionally, a duct system for passing exhaust gas discharged from a combustion device such as a thermal power plant, a steel mill, a garbage incineration plant, etc., has a duct system for absorbing thermal expansion and vibration of the duct itself. A flexible joint device configured using a tubular film body having elasticity and flexibility (see, for example, Japanese Patent Publication No. 48-33274) is provided in a part of the system path.
【０００３】前記フレキシブルジョイント装置によれ
ば、ダクトに発生する熱膨張による伸縮や振動は前記筒
状膜体の変位で吸収されるが、流体の温度が高い場合、
放散する熱により前記筒状膜体が早く劣化するので、筒
状膜体の内側に断熱材を設けたものが使われている。According to the flexible joint device, expansion and contraction and vibration due to thermal expansion generated in the duct are absorbed by the displacement of the tubular membrane, but when the temperature of the fluid is high,
Since the tubular film body is quickly deteriorated by the radiated heat, a tubular film body provided with a heat insulating material is used.
【０００４】図１３〜図１５に、前記高温用のフレキシ
ブルジョイント装置の代表的な構造例を示す。同図にお
いて、１ａ，１ｂは連通可能に分離されたダクト、２
ａ，２ｂは各ダクトにボルトで固定された金属製スリー
ブ、３ａ，３ｂは各スリーブの外周面に溶接で固定され
たフランジ、４は両フランジをその外周端で接続する伸
縮可撓性を有する筒状膜体である。前記対向する両フラ
ンジ３ａ，３ｂ間の環状の空所部内のスリーブ２ａ，２
ｂには、その外周面から半径方向に突出する複数本のス
タッドボルト５ａ，５ｂがそれぞれ溶接で固定され、前
記スタッドボルト５ａ，５ｂに、ダクトから発生する高
熱を遮断するための複数層からなる断熱材６が差し込ま
れている。この断熱材としては、セラミック繊維のフェ
ルトをガラスクロスや金網等で被覆したものが多く使わ
れている。13 to 15 show typical structural examples of the flexible joint device for high temperature. In the figure, reference numerals 1a and 1b denote ducts separated so as to be able to communicate with each other;
a and 2b are metal sleeves fixed to each duct by bolts, 3a and 3b are flanges fixed to the outer peripheral surface of each sleeve by welding, and 4 is elastic and flexible to connect both flanges at their outer peripheral ends. It is a tubular membrane. Sleeves 2a, 2 in the annular space between the opposing flanges 3a, 3b
A plurality of stud bolts 5a and 5b protruding in the radial direction from the outer peripheral surface of the stud are fixed by welding to b, and the stud bolts 5a and 5b are formed of a plurality of layers for blocking high heat generated from the duct. The heat insulating material 6 is inserted. As the heat insulating material, a material obtained by coating ceramic fiber felt with a glass cloth, a wire mesh, or the like is often used.
【０００５】前記スタッドボルト５ａ，５ｂには、ボル
ト穴７ａに差し込んで断熱材６を押える座板部７ｂと、
この座板部の差し込みが容易で、差し込んだあとボルト
ネジ部に係合して座板部を抜けにくくするためのボルト
穴の内側に形成されたボルト係合用爪部７ｃとから成る
座金部材７が装着されている。The stud bolts 5a and 5b have a seat plate portion 7b which is inserted into the bolt hole 7a to press the heat insulating material 6,
This washer member 7 is easy to insert, and a washer member 7 including a bolt engaging claw portion 7c formed inside the bolt hole for engaging the bolt screw portion after inserting and making it difficult to remove the seat plate portion is formed. It is installed.
【０００６】[0006]
【発明が解決しようとする課題】上記のような従来の高
温用フレキシブルジョイント装置は、燃焼装置から排出
される排ガスによる熱膨張や燃焼装置の振動等が原因で
ダクトに発生する熱膨張による伸縮や応力を吸収するた
め、前記筒状膜体４と断熱材６が変位を繰り返してい
る。これに加えて断熱材６を固定するためのスタッドボ
ルト５ａ，５ｂは、ダクトにボルトで固定されているス
リーブ２ａ，２ｂに溶接されているため、燃焼装置の振
動を受けてスタッドボルトを差し込む断熱材６のボルト
穴が摩耗によって次第に拡大する。The conventional high-temperature flexible joint device as described above has a problem in that expansion and contraction due to thermal expansion generated in a duct due to thermal expansion due to exhaust gas discharged from the combustion device, vibration of the combustion device, and the like. In order to absorb the stress, the cylindrical film body 4 and the heat insulating material 6 are repeatedly displaced. In addition to this, since the stud bolts 5a and 5b for fixing the heat insulating material 6 are welded to the sleeves 2a and 2b which are fixed to the duct with bolts, the stud bolts are inserted due to the vibration of the combustion device. The bolt holes of the material 6 gradually expand due to wear.
【０００７】特に、コンバインド発電のようにガスが高
温で大口径のものは断熱材の使用量も多く自重が大きい
ため、断熱材のボルト穴が拡大するだけではなく、側面
部の断熱材がずり落ちたり、下面部の断熱材がたれ下が
ったりして、断熱材と断熱材の間や断熱材と金属フラン
ジの間に隙間が生じる場合がある。そして、このような
隙間の発生を放置しておくと、隙間から高熱が入ってき
て、突然筒状膜体が破損するので、それを交換するため
にダクト系路を止めなければならず、多大な損失が発生
し、大きな問題になっている。また、この断熱材の移動
を防止するために帯状の金属板を断熱材の上から当てて
ベルトのように固定した構造のものが提案されている
が、装置の振動により帯状の金属板と座金やナットが共
振して、大きな騒音を発生する欠点がある。In particular, in the case of combined power generation, in which the gas has a high temperature and a large diameter, the amount of heat insulating material used is large and the weight of the heat insulating material is large. There is a case where a gap is formed between the heat insulating material and the heat insulating material or between the heat insulating material and the metal flange because the heat insulating material is dropped or the heat insulating material of the lower surface portion hangs down. If such a gap is left unattended, high heat enters from the gap and the tubular membrane body is suddenly damaged.Therefore, the duct system path must be stopped in order to replace it. Loss has become a big problem. In order to prevent the movement of the heat insulating material, a structure in which a belt-shaped metal plate is pressed against the heat insulating material and fixed like a belt has been proposed. There is a drawback that the nut and nut resonate and generate a large noise.
【０００８】本発明は、上記構成の高温用フレキシブル
ジョイント装置の問題点に着目してなされたものであっ
て、スタッドボルト穴周縁の断熱材の摩耗を軽減するこ
とができ、かつ断熱材のずり落ちやたれ下がりによる断
熱材と断熱材の間や断熱材とフランジの間の隙間の発生
を未然に防止することができるフレキシブルジョイント
装置を提供することを目的としている。The present invention has been made by paying attention to the problems of the high temperature flexible joint device having the above-mentioned structure, and it is possible to reduce the wear of the heat insulating material around the stud bolt hole and to offset the heat insulating material. An object of the present invention is to provide a flexible joint device capable of preventing the generation of a gap between a heat insulating material and a heat insulating material or between a heat insulating material and a flange due to falling or dropping.
【０００９】[0009]
【課題を解決するための手段】本発明は、分離された一
対のダクトにそれぞれ連結される連通可能な一対のスリ
ーブと、前記各スリーブの外周面に対向するように設け
られた一対のフランジと、前記対向するフランジ間を接
続する伸縮可撓性を有する筒状膜体と、前記筒状膜体内
の各スリーブの外周面に半径方向に突出するように設け
られた複数本のスタッドボルトと、前記スタッドボルト
に積層状に差し込まれた断熱材とからなるフレキシブル
ジョイント装置であって、前記スタッドボルトに、ボル
ト穴に差し込んで断熱材を押える座板部と、この座板部
の差し込みが容易で、差し込んだあとボルトネジ部に係
合して座板部を抜けにくくするために座板部に形成され
たボルト係合用爪部と、前記断熱材に差し込んで断熱材
を固定保持するために座板部に形成された断熱材係合用
爪部とから成る座金部材が装着されていることを要旨と
している。SUMMARY OF THE INVENTION According to the present invention, a pair of communicable sleeves respectively connected to a pair of separated ducts and a pair of flanges provided so as to face the outer peripheral surface of each sleeve. A tubular film body having expansion and contraction flexibility for connecting between the opposed flanges, and a plurality of stud bolts provided so as to project in a radial direction on an outer peripheral surface of each sleeve in the tubular film body, A flexible joint device comprising a heat insulating material inserted into the stud bolt in a laminated shape, wherein a seat plate portion which is inserted into the bolt hole to press the heat insulating material and the seat plate portion can be easily inserted into the stud bolt. , After being inserted, the bolt engaging claw portion formed on the seat plate portion in order to engage the bolt screw portion and make it difficult to remove the seat plate portion, and the heat insulating material is fixedly held by being inserted into the heat insulating material. Washer member made of a heat insulating material engaging claw portion formed in the seat plate portions is summarized in that mounted on.
【００１０】上記構成によれば、スタッドボルトに装着
する座金部材に断熱材を固定するための爪部が形成され
ているため、熱膨張、振動等によるスリーブの動きに断
熱材の動きが一体化する作用が高まり、スタッドボルト
穴周辺の断熱材の摩耗を軽減することができるため、断
熱材のずり落ちや、たれ下がりによる断熱材と断熱材の
間や断熱材とフランジの間の隙間の発生を防止すること
ができる。According to the above construction, the washer member attached to the stud bolt is formed with the claw portion for fixing the heat insulating material. Therefore, the movement of the heat insulating material is integrated with the movement of the sleeve due to thermal expansion, vibration and the like. The effect of this is to reduce the wear of the heat insulating material around the stud bolt holes, so that the heat insulating material may slip off and the clearance between the heat insulating material and the heat insulating material may cause gaps between the heat insulating material and the flange. Can be prevented.
【００１１】前記座金部材の形状は、丸形でもよいが、
前記断熱材係合用爪部の屈曲加工性を考えると、角形が
好ましい。また、前記座板部の大きさは、幅（角形）あ
るいは直径（丸形）がスタッドボルトの直径の３倍以
上、好ましくは５〜１０倍とする。これは、座板部に屈
曲加工した断熱材係合用爪部とスタッドボルトとの間隔
が小さすぎると、スタッドボルトを差し込むための断熱
材側のボルト穴が振動条件によっては、爪部の位置まで
拡大してしまい、より大きな穴となり、逆効果となるこ
とがあり、座板部が多きすぎるものは、スタッドボルト
に装着する際の操作性が悪くなる。また、座板部に形成
する断熱材係合用爪部は、断熱材への固定力を考える
と、スタッドボルトを中心にして対向する部位に複数個
形成するのが好ましい。The washer member may have a round shape,
Considering the bending workability of the heat insulating material engaging claw portion, a square shape is preferable. Further, the size of the seat plate portion is such that the width (square shape) or the diameter (round shape) is 3 times or more, preferably 5 to 10 times the diameter of the stud bolt. This is because if the distance between the stud bolt and the heat-insulating material engaging claw that is bent on the seat plate is too small, the bolt hole on the heat-insulating material side for inserting the stud bolt may reach the position of the claw depending on the vibration conditions. If the seat plate part has too many seat plates, the operability when mounting on the stud bolt becomes poor. Further, in consideration of the fixing force to the heat insulating material, it is preferable that a plurality of the heat insulating material engaging claw portions formed on the seat plate portion are formed at opposite portions with the stud bolt as the center.
【００１２】[0012]
【発明の実施の形態】図１〜図３に示すように、連通可
能に分離されたダクト１ａ，１ｂの先端スリーブ２ａ，
２ｂの外周にフランジ３ａ，３ｂをそれぞれ溶接で固定
し、フランジ間を伸縮可撓性を有する筒状膜体４で接続
し、対向するフランジ間のスリーブ外周面に半径方向に
突出する複数本のスタッドボルト５ａ，５ｂを溶接で固
定し、これらのスタッドボルトに断熱材６を複数層差し
込み、ナット８を螺着して断熱層を保持するフレキシブ
ルジョイント装置において、前記スタッドボルト５ａ，
５ｂに、ボルト穴に差し込んで断熱材を押える座板部１
０と、この座板部の差し込みが容易で、差し込んだあと
ボルトネジ部に係合して座板部を抜けにくくするために
ボルト穴の内側に形成されたボルト係合用爪部１０ｂ
と、前記座板部の端部にあって前記断熱材に差し込んで
断熱材を固定保持するために形成された断熱材係合用爪
部１０ｃとから成る座金部材Ａを装着した構成とする。
上記構成によれば、断熱材６を爪部１０ｃを固定保持で
きるので、断熱材はずれなくなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1-3, distal end sleeves 2a, 2a of ducts 1a, 1b which are communicably separated.
The flanges 3a and 3b are respectively fixed to the outer circumference of 2b by welding, the flanges are connected by a tubular film body 4 having stretchable flexibility, and a plurality of radially projecting outer circumferential surfaces of the sleeves between the opposing flanges. In the flexible joint device in which the stud bolts 5a, 5b are fixed by welding, a plurality of layers of the heat insulating material 6 are inserted into these stud bolts, and the nut 8 is screwed to hold the heat insulating layer, the stud bolts 5a, 5b
Seat plate part 1 that inserts into the bolt hole 5b and presses the heat insulating material
0, the seat plate portion can be easily inserted, and the bolt engaging claw portion 10b formed inside the bolt hole for engaging the bolt screw portion after the insertion to make it difficult to remove the seat plate portion.
And a washer member A including an adiabatic material engaging claw portion 10c formed at the end of the seat plate portion to be inserted into the adiabatic material and fixedly hold the adiabatic material.
According to the above configuration, since the claw portion 10c can be fixedly held by the heat insulating material 6, the heat insulating material does not slip.
【００１３】[0013]
実施例１ 本実施例は図１〜図４に示したものである。なお、同図
において、図１３〜図１５と同一または類似する部材に
は同じ符号が付されている。即ち、１ａ，１ｂは連通可
能に分離されたダクト、２ａ，２ｂは各ダクトにボルト
で固定された金属製スリーブ、３ａ，３ｂは各スリーブ
の外周面に溶接で固定されたフランジ、４は両フランジ
をその外周端で接続する伸縮可撓性を有する筒状膜体、
５ａ，５ｂは前記スリーブ２ａ，２ｂに溶接で固定した
スタッドボルト、６はスタッドボルトに差し込んだ断熱
材、８はスタッドボルトに螺着した断熱材押えナットで
ある。Example 1 This example is shown in FIGS. In the figure, the same or similar members as those in FIGS. 13 to 15 are designated by the same reference numerals. That is, 1a and 1b are ducts that are separated so that they can communicate with each other, 2a and 2b are metal sleeves that are fixed to each duct by bolts, 3a and 3b are flanges that are fixed to the outer peripheral surface of each sleeve by welding, and 4 is both. A tubular film body having expansion and contraction flexibility for connecting a flange at its outer peripheral end,
5a and 5b are stud bolts fixed to the sleeves 2a and 2b by welding, 6 is a heat insulating material inserted into the stud bolts, and 8 is a heat insulating material holding nut screwed to the stud bolts.
【００１４】Ａはスタッドボルト５ａ，５ｂに装着され
た座金部材であり、ボルトに差し込んだ断熱材を押える
角形の座板部１０と、この座板部のボルト穴１０ａへの
差し込みが容易で、差し込んだあとのボルトネジ部に係
合して座板部を抜けにくくするためにボルト穴１０ａの
内側に屈曲加工されたボルト係合用爪部１０ｂと、前記
座板部１０の端部にあって前記断熱材に差し込んで断熱
材を固定するために座板部の縁辺側に屈曲加工された複
数の断熱材係合用爪部１０ｃとで形成されている。上記
実施例１では、前記角形の座板部１０に設ける断熱材係
合用爪部１０ｃは、座板部１０の対向する２つの縁辺の
中間部位にそれぞれ２個形成されている。A is a washer member attached to the stud bolts 5a and 5b, and a square seat plate portion 10 for pressing the heat insulating material inserted in the bolt and the seat plate portion can be easily inserted into the bolt holes 10a. A bolt engaging claw portion 10b that is bent inside the bolt hole 10a for engaging the bolt screw portion after being inserted to make it difficult to remove the seat plate portion, and at the end portion of the seat plate portion 10 It is formed by a plurality of heat insulating material engaging claw portions 10c that are bent on the edge side of the seat plate portion to be inserted into the heat insulating material to fix the heat insulating material. In the first embodiment, two heat-insulating material engaging claw portions 10c provided on the square seat plate portion 10 are formed at intermediate portions of two facing edges of the seat plate portion 10, respectively.
【００１５】前記３層の断熱材６のうち、中心部より１
層目の断熱材は、厚さ５０ｍｍ、長さ６０ｃｍ、幅４８
ｃｍのセラミック繊維のフェルトを、シリカファイバー
を織製してなる厚さ１．５ｍｍのシリカクロスと、線径
０．２５ｍｍ、１６メッシュのＳＵＳ３１６製の金網と
で被覆し、ボルト穴として２２ｍｍの下穴をあけて構成
し、この断熱材を前記治具に溶接された外径１０ｍｍの
スタッドボルトに差し込み、これに厚さ０．３ｍｍ、一
辺長さ７０ｍｍのＳＵＳ３０４製角形座板部の中心部位
にボルト穴を設けると共にボルト係合用爪部を形成し、
座板部の対向縁辺の中間部位にそれぞれ２本の爪部を形
成して成る座金部材Ａを装着し、断熱材を固定保持し
た。Of the three layers of heat insulating material 6, 1 from the center
The heat insulation material of the layer is 50 mm in thickness, 60 cm in length, and 48 in width.
cm ceramic fiber felt is coated with 1.5 mm thick silica cloth made by weaving silica fiber, and SUS316 wire mesh with a wire diameter of 0.25 mm and 16 mesh. This heat insulating material is inserted into a stud bolt with an outer diameter of 10 mm that is welded to the jig, and the heat insulating material is inserted into a central portion of a square seat plate made of SUS304 having a thickness of 0.3 mm and a side length of 70 mm. A bolt hole is provided and a bolt engaging claw is formed,
A washer member A formed by forming two claw portions at each of intermediate portions of opposite edges of the seat plate portion was attached, and the heat insulating material was fixedly held.
【００１６】次に２層目の断熱材は、厚さ５０ｍｍ、長
さ６０ｃｍ、幅４８ｃｍのセラミック繊維のフェルト
を、線径０．２５ｍｍ、１６メッシュのＳＵＳ３１６製
の金網で被覆し、２２ｍｍの下穴をあけて構成し、１層
目の断熱材と同様な座金部材で固定保持した。Next, as the second layer of heat insulating material, a felt made of ceramic fiber having a thickness of 50 mm, a length of 60 cm and a width of 48 cm was covered with a wire mesh made of SUS316 having a wire diameter of 0.25 mm and 16 mesh, and a thickness of 22 mm was obtained. It was constructed by making holes, and was fixed and held by a washer member similar to the heat insulating material of the first layer.
【００１７】さらに３層目の断熱材は、厚さ５０ｍｍ、
長さ６０ｃｍ、幅４８ｃｍのセラミック繊維のフェルト
を、厚さ１．５ｍｍガラスクロスで被覆して２２ｍｍの
下穴をあけて構成し、１層目の断熱材と同様な座金部材
で固定保持した。The third layer of heat insulating material has a thickness of 50 mm,
A felt of ceramic fiber having a length of 60 cm and a width of 48 cm was covered with a glass cloth having a thickness of 1.5 mm to form a prepared hole of 22 mm, and fixed and held by a washer member similar to the heat insulating material of the first layer.
【００１８】実施例２ 本実施例は、実施例１の座金部材Ａとして、図５〜図６
に示すように、角形座板部１０の４つの縁辺の中間部位
にそれぞれ２つの爪部１０ｃを形成したものを用いてい
る。Example 2 In this example, as the washer member A of Example 1, FIGS.
As shown in FIG. 5, the square seat plate portion 10 is formed with two claw portions 10c at intermediate portions of the four edges.
【００１９】実施例３ 本実施例は、実施例１の座金部材Ａとして、図７〜図８
に示すように、角形座板部１０の対向する２つの縁辺の
端部にそれぞれ２つの爪部１０ｃを形成したものを用い
ている。Example 3 In this example, as the washer member A of Example 1, FIGS.
As shown in FIG. 5, the rectangular seat plate 10 has two claws 10c formed at the ends of two opposite edges.
【００２０】実施例４ 本実施例は、実施例１の座金部材Ａとして、図９〜図１
０に示すように、４つの角隅部位にそれぞれ２つの爪部
１０ｃを形成したものを用いている。Example 4 In this example, a washer member A of Example 1 is used as shown in FIGS.
As shown in 0, the two claw portions 10c are formed in each of the four corner portions.
【００２１】比較例 本比較例は、実施例１の座金部材に代えて、図１４〜図
１５に示す断熱材係合用爪部のない座金部材を用いてい
る。Comparative Example In this comparative example, the washer member shown in FIGS. 14 to 15 is used instead of the washer member of the first embodiment.
【００２２】前記実施例と比較例の性能を比較するた
め、簡易試験として、図１１〜図１２のようなダクトの
スリーブを想定した長さ１００ｃｍ、幅５０ｃｍのコ字
形枠体の治具Ｆを用い、これにスタッドボルト５ａを４
本溶接にて固定し、そのスタッドボルトに前記断熱材を
差し込み、ナット８で保持して試験体を構成し、これを
加速度４．５Ｇ、周波数５０Ｈｚで３日間連続して振動
試験を行ない、４本のスタッドボルトに差し込んだ３層
の断熱材のボルト穴を測定した。ボルト穴の変化率は下
記［１］式により求めた。表１に４本のボルト穴の変化
率の平均を示す。 γ2−γ1／γ2×１００ …［１］ 上記式中、γ1は断熱材の初期ボルト穴径、γ2は振動に
より試験体の縦方向に楕円状に拡大したボルト穴の長径
である。In order to compare the performances of the embodiment and the comparative example, as a simple test, a jig F having a U-shaped frame body having a length of 100 cm and a width of 50 cm, which assumes a sleeve of a duct as shown in FIGS. Use the stud bolt 5a to
It is fixed by main welding, the heat insulating material is inserted into the stud bolt, and it is held by the nut 8 to form a test body, which is subjected to a vibration test for 3 consecutive days at an acceleration of 4.5 G and a frequency of 50 Hz. The bolt holes of the three layers of heat insulating material inserted into the stud bolts were measured. The rate of change of the bolt holes was determined by the following equation [1]. Table 1 shows the average change rate of the four bolt holes. During γ 2 -γ 1 / γ 2 × 100 ... [1] above formula, gamma 1 the initial bolt hole diameter of heat insulator, gamma 2 in diameter of the bolt hole is enlarged longitudinally oval shaped test member by vibration is there.
【００２３】[0023]
【表１】 [Table 1]
【００２４】前記表から明らかなように、前記実施例の
座金部材を用いて断熱材を固定すると、ボルト穴の変化
がいずれの層においても小さく保たれることが確認され
た。なお拡大された縦方向の穴径（楕円に拡大された場
合の長径）に対し、短径にあたる横方向の穴径の変化は
殆んどなかったことも確認された。As is clear from the above table, it was confirmed that when the heat insulating material was fixed using the washer member of the above embodiment, the change in the bolt hole was kept small in any layer. It was also confirmed that there was almost no change in the lateral hole diameter, which is the short diameter, with respect to the enlarged vertical hole diameter (long diameter when expanded to an ellipse).
【００２５】[0025]
【発明の効果】以上詳述したように、本発明のダクト用
フレキシブルジョイント装置の構成によれば、スタッド
ボルトに装着する座金部材の縁辺側に断熱材に差し込ん
で固定するための爪部を有するので、火力発電所、製鉄
所、ゴミ焼却場等のダクトに使用しても、ダクトに発生
する振動で断熱材がスタッドボルトからずれることが少
なくなり、断熱材同士の隙間や断熱材とフランジとの隙
間の発生を防止できるので、隙間からの高熱の流入によ
る筒状膜体の破壊を防止できるという効果が得られる。As described in detail above, according to the structure of the flexible joint device for a duct of the present invention, the claw portion for inserting and fixing the heat insulating material is provided on the edge side of the washer member attached to the stud bolt. Therefore, even when used in ducts of thermal power plants, steel mills, refuse incinerators, etc., the vibrations generated in the ducts make it less likely that the heat insulating material will shift from the stud bolts, resulting in gaps between heat insulating materials and between heat insulating material and flanges. Since it is possible to prevent the occurrence of the gap, it is possible to obtain an effect of preventing the tubular film body from being broken due to the inflow of high heat from the gap.
【図１】本発明の一実施例を示すフレキシブルジョイン
ト装置の断面図である。FIG. 1 is a cross-sectional view of a flexible joint device showing an embodiment of the present invention.
【図２】フレキシブルジョイント装置の一部の拡大断面
図である。FIG. 2 is an enlarged sectional view of a part of the flexible joint device.
【図３】実施例［１］における座金部材の平面図であ
る。FIG. 3 is a plan view of a washer member in the embodiment [1].
【図４】前記座金部材の側面図である。FIG. 4 is a side view of the washer member.
【図５】実施例［２］における座金部材を示す平面図で
ある。FIG. 5 is a plan view showing a washer member in the embodiment [2].
【図６】前記座金部材の側面図である。FIG. 6 is a side view of the washer member.
【図７】実施例［３］における座金部材を示す平面図で
ある。FIG. 7 is a plan view showing a washer member in the embodiment [3].
【図８】前記座金部材の側面図である。FIG. 8 is a side view of the washer member.
【図９】実施例［４］における座金部材を示す平面図で
ある。FIG. 9 is a plan view showing a washer member in the embodiment [4].
【図１０】前記座金部材の側面図である。FIG. 10 is a side view of the washer member.
【図１１】振動試験体の横断面図である。FIG. 11 is a cross-sectional view of a vibration test body.
【図１２】振動試験体の正面図である。FIG. 12 is a front view of a vibration test body.
【図１３】従来のフレキシブルジョイント装置の断面図
である。FIG. 13 is a cross-sectional view of a conventional flexible joint device.
【図１４】前記装置に用いた座金部材の平面図である。FIG. 14 is a plan view of a washer member used in the device.
【図１５】前記座金部材の断面図である。FIG. 15 is a sectional view of the washer member.
１ａ，１ｂ ダクト ２ａ，２ｂ スリーブ ３ａ，３ｂ フランジ ４ 伸縮可撓性筒状膜体 ５ａ，５ｂ スタッドボルト ６ 断熱材 ７ 座金部材 ７ａ 座板部 ７ｂ ボルト穴 ７ｃ 爪部 ８ ナット Ａ 座金部材 １０ 座板部 １０ａ ボルト穴 １０ｂ ボルト係合用爪部 １０ｃ 断熱材係合用爪部 Ｆ 振動試験治具 1a, 1b Ducts 2a, 2b Sleeves 3a, 3b Flange 4 Flexible elastic tubular film body 5a, 5b Stud bolt 6 Heat insulating material 7 Washer member 7a Seat plate part 7b Bolt hole 7c Claw part 8 Nut A Washer member 10 Seat plate Part 10a Bolt hole 10b Bolt engaging claw part 10c Heat insulating material engaging claw part F Vibration test jig
Claims (3)
される連通可能な一対のスリーブと、前記各スリーブの
外周面に対向するように設けられた一対のフランジと、
前記対向するフランジ間を接続する伸縮可撓性を有する
筒状膜体と、前記筒状膜体内の各スリーブの外周面に半
径方向に突出するように設けられた複数本のスタッドボ
ルトと、前記スタッドボルトに積層状に差し込まれた断
熱材とからなるフレキシブルジョイント装置であって、
前記スタッドボルトに、ボルト穴に差し込んで断熱材を
押える座板部と、この座板部の差し込みが容易で、差し
込んだあとボルトネジ部に係合して座板部を抜けにくく
するために座板部に形成されたボルト係合用爪部と、前
記断熱材に差し込んで断熱材を固定保持するために座板
部に形成された断熱材係合用爪部とから成る座金部材が
装着されていることを特徴とするフレキシブルジョイン
ト装置。1. A pair of communicable sleeves that are respectively connected to a pair of separated ducts, and a pair of flanges that are provided so as to face the outer peripheral surface of each sleeve.
A tubular film body having expansion and contraction flexibility for connecting between the opposed flanges, and a plurality of stud bolts provided so as to project in a radial direction on an outer peripheral surface of each sleeve in the tubular film body, A flexible joint device comprising a heat insulating material inserted into a stud bolt in a laminated manner,
A seat plate part for inserting the stud bolt into the bolt hole and pressing the heat insulating material, and a seat plate part for easily inserting the seat plate part and engaging the bolt screw part after inserting to prevent the seat plate part from coming off easily. A washer member is installed, which includes a bolt engaging claw portion formed on the seat portion and a heat insulating material engaging claw portion formed on the seat plate portion for fixing the heat insulating material by inserting it into the heat insulating material. Flexible joint device.
とし、その座板部の縁辺の一部を屈曲して複数の断熱材
係合用爪部を形成した請求項１に記載のフレキシブルジ
ョイント装置。2. The flexible member according to claim 1, wherein the seat plate portion of the washer member has a round shape or a rectangular shape, and a part of an edge of the seat plate portion is bent to form a plurality of heat insulating material engaging claw portions. Joint device.
ボルト径の５〜１０倍とした請求項１に記載のフレキシ
ブルジョイント装置。3. The flexible joint device according to claim 1, wherein the size of the seat plate portion of the washer member is 5 to 10 times the diameter of the stud bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06206296A JP3255572B2 (en) | 1996-02-23 | 1996-02-23 | Flexible joint device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06206296A JP3255572B2 (en) | 1996-02-23 | 1996-02-23 | Flexible joint device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09229266A true JPH09229266A (en) | 1997-09-05 |
| JP3255572B2 JP3255572B2 (en) | 2002-02-12 |
Family
ID=13189267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06206296A Expired - Fee Related JP3255572B2 (en) | 1996-02-23 | 1996-02-23 | Flexible joint device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3255572B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015068434A (en) * | 2013-09-30 | 2015-04-13 | 株式会社東京興業貿易商会 | Heat insulating material unit and expansion joint using the same, and heat insulating material holding movable pin and expansion joint using the same |
| CN104613260A (en) * | 2015-02-02 | 2015-05-13 | 江苏华顶建设工程股份有限公司 | Canvas flexible joint |
| CN112128499A (en) * | 2020-10-16 | 2020-12-25 | 诸暨市沣泽动力机械有限公司 | Novel heavy-duty combustion engine nonmetal expansion joint |
-
1996
- 1996-02-23 JP JP06206296A patent/JP3255572B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015068434A (en) * | 2013-09-30 | 2015-04-13 | 株式会社東京興業貿易商会 | Heat insulating material unit and expansion joint using the same, and heat insulating material holding movable pin and expansion joint using the same |
| CN104613260A (en) * | 2015-02-02 | 2015-05-13 | 江苏华顶建设工程股份有限公司 | Canvas flexible joint |
| CN112128499A (en) * | 2020-10-16 | 2020-12-25 | 诸暨市沣泽动力机械有限公司 | Novel heavy-duty combustion engine nonmetal expansion joint |
| CN112128499B (en) * | 2020-10-16 | 2023-08-29 | 诸暨市沣泽动力机械有限公司 | Novel nonmetal expansion joint of heavy-duty gas turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3255572B2 (en) | 2002-02-12 |
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