JP2002113433A - Expansion joint and exhaust duct using the same - Google Patents
Expansion joint and exhaust duct using the sameInfo
- Publication number
- JP2002113433A JP2002113433A JP2000310786A JP2000310786A JP2002113433A JP 2002113433 A JP2002113433 A JP 2002113433A JP 2000310786 A JP2000310786 A JP 2000310786A JP 2000310786 A JP2000310786 A JP 2000310786A JP 2002113433 A JP2002113433 A JP 2002113433A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- outer cylinder
- inner cylinder
- gap
- expansion joint
- 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.)
- Pending
Links
Landscapes
- Cleaning In General (AREA)
- Prevention Of Fouling (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、含塵ガスの流路に
設置するエキスパンションジョイント、およびそのエキ
スパンションジョンイトを配設した排気ダクトに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion joint installed in a dust-containing gas flow path and an exhaust duct provided with the expansion joint.
【０００２】[0002]
【従来の技術】一般にエキスパンションジョイントと呼
ばれるダクト用ジョイントは伸縮可能な外筒と、その内
側に配設される内筒からなる。溶融金属の処理設備では
大量の粉塵（たとえばダスト等）が発生し、その粉塵を
含む排気ガス（以下、含塵ガスという）の流路となる排
気ダクトにエキスパンションジョイントを使用すると、
含塵ガス中の粉塵が外筒と内筒との間隙に侵入して堆積
する。外筒と内筒との間隙に粉塵が堆積すると、外筒が
伸縮するときの摺動抵抗が増大する。さらに、粉塵が外
筒と内筒との間隙に充満すると、外筒の伸縮機能が失わ
れる。2. Description of the Related Art A duct joint generally called an expansion joint comprises an extendable outer cylinder and an inner cylinder disposed inside the outer cylinder. Molten metal processing equipment generates a large amount of dust (such as dust), and when an expansion joint is used in an exhaust duct that serves as a flow path for exhaust gas containing the dust (hereinafter referred to as dust-containing gas),
Dust in the dust-containing gas enters the gap between the outer cylinder and the inner cylinder and accumulates. When dust accumulates in the gap between the outer cylinder and the inner cylinder, sliding resistance when the outer cylinder expands and contracts increases. Furthermore, if dust fills the gap between the outer cylinder and the inner cylinder, the outer cylinder loses its expansion and contraction function.
【０００３】そのような状態で外筒を伸縮させると、エ
キスパンションジョイントのベローズが破損する。その
とき、エキスパンションジョイントを配設された排気ダ
クト内が正圧の場合は、含塵ガスが大気中へ放散され、
環境汚染の原因となるばかりか、含塵ガスが可燃性であ
れば火災が発生し、含塵ガスが有毒であればガス中毒が
発生する可能性もある。逆に、エキスパンションジョイ
ントを配設された排気ダクト内が負圧の場合は、大気が
排気ダクト内に吸引されて負圧を維持できなくなり、操
業上のトラブルが発生する。When the outer cylinder is expanded and contracted in such a state, the bellows of the expansion joint is damaged. At that time, if the inside of the exhaust duct where the expansion joint is arranged has a positive pressure, the dust-containing gas is released to the atmosphere,
In addition to causing environmental pollution, fire may occur if the dust-containing gas is flammable, and gas poisoning may occur if the dust-containing gas is toxic. On the other hand, if the inside of the exhaust duct in which the expansion joint is provided has a negative pressure, the atmosphere is sucked into the exhaust duct and the negative pressure cannot be maintained, thereby causing a trouble in operation.
【０００４】そのため、エキスパンションジョイントに
ダスト等の粉塵が付着あるいは堆積するのを防止し、か
つ除去する必要がある。特開平6-220522号公報には、真
空脱ガス装置の排気ダクト内ダスト付着防止方法が開示
されている。この方法は、真空脱ガス装置の排気ダクト
の天井側から床側内面に向けて復圧ノズルから不活性ガ
スを吹き込み、排気ダクト床面とこれに連なるエキスパ
ンションジョイント床面に堆積したダストを除去しよう
とするものである。しかしこの方法では、外筒と内筒と
を有する２重構造のエキスパンションジョイントを使用
する場合に、外筒と内筒との間隙に堆積した粉塵を除去
できないという問題があった。Therefore, it is necessary to prevent dust or other dust from adhering or accumulating on the expansion joint and to remove the dust. Japanese Patent Application Laid-Open No. 6-220522 discloses a method for preventing dust from adhering in an exhaust duct of a vacuum degassing apparatus. In this method, inert gas is blown from the ceiling side of the exhaust duct of the vacuum degassing device from the ceiling side to the inner side of the floor side to remove dust accumulated on the exhaust duct floor and the expansion joint floor connected to it. It is assumed that. However, this method has a problem in that when a double-structured expansion joint having an outer cylinder and an inner cylinder is used, dust accumulated in a gap between the outer cylinder and the inner cylinder cannot be removed.
【０００５】外筒と内筒とを有するエキスパンションジ
ョイントにおいては、内筒の片方の端部は外筒と一体的
に固定されており、粉塵が外筒と内筒との間隙に侵入し
にくい構造になっている。しかし内筒の他方の端部は、
外筒の伸縮を可能にするために固定されておらず、粉塵
がこの端部から間隙に侵入して堆積する。したがって外
筒と内筒とを有するエキスパンションジョイントを使用
する場合は、含塵ガスが排気ダクト内を流れる方向を考
慮してエキスパンションジョイントを配設する必要があ
る。In an expansion joint having an outer cylinder and an inner cylinder, one end of the inner cylinder is fixed integrally with the outer cylinder, so that dust is less likely to enter the gap between the outer cylinder and the inner cylinder. It has become. But the other end of the inner cylinder
It is not fixed to allow the outer cylinder to expand and contract, and dust enters the gap from this end and accumulates. Therefore, when using an expansion joint having an outer cylinder and an inner cylinder, it is necessary to dispose the expansion joint in consideration of the direction in which the dust-containing gas flows in the exhaust duct.
【０００６】すなわち、エキスパンションジョイントの
外筒と内筒が固定されている端部を含塵ガスの流れの上
流側に向け、内筒が固定されていない端部を含塵ガスの
流れの下流側に向けて配設する。しかし、このように排
気ダクト内を流れる含塵ガスの進行方向を考慮してエキ
スパンションジョイントを配設しても、外筒と内筒との
間隙に粉塵が侵入して堆積するのは避けられず、定期的
に粉塵を除去する作業が必要になるという問題があっ
た。That is, the end of the expansion joint where the outer cylinder and the inner cylinder are fixed is directed toward the upstream side of the flow of the dust-containing gas, and the end where the inner cylinder is not fixed is positioned downstream of the flow of the dust-containing gas. Arranged for However, even if the expansion joint is arranged in consideration of the traveling direction of the dust-containing gas flowing in the exhaust duct, it is inevitable that dust will enter and accumulate in the gap between the outer cylinder and the inner cylinder. However, there is a problem that an operation for periodically removing dust is required.
【０００７】そこで粉塵の侵入を防止するために、外筒
と内筒との間隙にセラミックファイバー製のシートを挿
入する技術も知られている。しかしこの技術では、粉塵
の成分や温度によってはセラミックファイバーが侵食さ
れたり、あるいは含塵ガスの水分含有量によってはセラ
ミックファイバーが膨潤して粉塵の付着を助長するとい
う問題があった。In order to prevent the intrusion of dust, there is known a technique of inserting a ceramic fiber sheet into a gap between the outer cylinder and the inner cylinder. However, this technique has a problem that the ceramic fiber is eroded depending on the component and temperature of the dust, or the ceramic fiber swells depending on the moisture content of the dust-containing gas to promote adhesion of the dust.
【０００８】[0008]
【発明が解決しようとする課題】本発明は上記のような
問題を解消し、外筒と内筒との間隙に粉塵が侵入して堆
積するのを防止できるエキスパンションジョイントを提
供し、さらにそのエキスパンションジョイトを溶融金属
の処理設備の排気口と排気ダクトとの接続部に配設した
排気ダクトを提供することを目的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides an expansion joint capable of preventing dust from entering and accumulating in a gap between an outer cylinder and an inner cylinder. An object of the present invention is to provide an exhaust duct in which a join is provided at a connection between an exhaust port of a molten metal processing facility and an exhaust duct.
【０００９】[0009]
【課題を解決するための手段】本発明は、伸縮可能な外
筒と、外筒の内側に配設される内筒とを有するエキスパ
ンションジョイントであって、外筒と内筒との間隙に洗
浄ガスを供給するガス供給手段を有するエキスパンショ
ンジョイントである。また本発明は、溶融金属の処理設
備から発生する含塵ガスを排気する排気ダクトであっ
て、伸縮可能な外筒と、外筒の内側に配設される内筒
と、外筒および内筒で形成される間隙に洗浄ガスを供給
するガス供給手段とを有するエキスパンションジョイン
トを、溶融金属の処理設備の排気口と排気ダクトとの接
続部に配設してなる排気ダクトである。SUMMARY OF THE INVENTION The present invention relates to an expansion joint having an expandable and contractible outer cylinder and an inner cylinder disposed inside the outer cylinder. An expansion joint having gas supply means for supplying gas. Further, the present invention provides an exhaust duct for exhausting dust-containing gas generated from a molten metal processing facility, comprising: an extendable outer cylinder, an inner cylinder disposed inside the outer cylinder, an outer cylinder, and an inner cylinder. Is an exhaust duct having an expansion joint having gas supply means for supplying a cleaning gas to the gap formed by the process described above, provided at a connection between the exhaust port of the molten metal processing facility and the exhaust duct.
【００１０】前記した排気ダクトの発明においては、好
適態様として、処理設備が真空処理設備であることが好
ましい。In the invention of the exhaust duct described above, it is preferable that the processing equipment is a vacuum processing equipment.
【００１１】[0011]
【発明の実施の形態】図１は、本発明のエキスパンショ
ンジョンイト（以下、エキスパンションという）の例を
示す断面図であり、図１(a) は横断面図、図１(b) は縦
断面図である。エキスパンションの両端にはボルト孔６
を有するフランジ１および1'が設けられ、各々溶融金属
の処理設備の排気口と排気ダクトとに接合される。1 is a cross-sectional view showing an example of an expansion joint (hereinafter referred to as an expansion) according to the present invention. FIG. 1A is a cross-sectional view, and FIG. FIG. Bolt holes 6 at both ends of the expansion
Flanges 1 and 1 'are provided, and are respectively connected to an exhaust port and an exhaust duct of a facility for treating molten metal.
【００１２】エキスパンションは外筒３と内筒２を有し
ており、外筒３にはベローズ４および駆動装置５が配設
され、伸縮可能な構成になっている。なお本発明におい
ては駆動装置５は特定の装置に限定せず、シリンダーや
モーター等の従来から知られている装置を使用すれば良
い。また駆動装置５の個数は、外筒３の大きさや重量を
考慮して適宜選択すれば良い。The expansion has an outer cylinder 3 and an inner cylinder 2, and a bellows 4 and a driving device 5 are arranged in the outer cylinder 3 so as to be expandable and contractible. In the present invention, the driving device 5 is not limited to a specific device, and a conventionally known device such as a cylinder or a motor may be used. The number of the driving devices 5 may be appropriately selected in consideration of the size and weight of the outer cylinder 3.
【００１３】図１(b) に示すように、外筒３と内筒２は
Ｂ端で一体的に固定されるが、Ａ端では内筒２は固定さ
れておらず、外筒３と内筒２との間隙にスペーサー８を
装着して、外筒３と内筒２の接触や変形を防止するのが
好ましい。また、溶鋼の真空処理設備等のように、高温
の含塵ガスを発生する設備の排気ダクトに使用する場合
には、内筒２の内面に耐火物９をライニングして、熱に
よる変形を防止するのが好ましい。As shown in FIG. 1B, the outer cylinder 3 and the inner cylinder 2 are fixed integrally at the B end, but the inner cylinder 2 is not fixed at the A end, and It is preferable to attach a spacer 8 to the gap between the outer cylinder 3 and the inner cylinder 2 to prevent the outer cylinder 3 from contacting or deforming. Also, when used in an exhaust duct of equipment that generates high-temperature dust-containing gas, such as a molten steel vacuum processing equipment, a refractory 9 is lined on the inner surface of the inner cylinder 2 to prevent deformation due to heat. Is preferred.
【００１４】さらにガス供給配管７を介して、洗浄ガス
を外筒３と内筒２との間隙に供給する。洗浄ガスが外筒
３と内筒２との間隙に供給されることによって、内筒２
内を流れる含塵ガス中の粉塵が、外筒３と内筒２との間
隙に侵入するのを防止する。図１(b) にはガス供給配管
７を外筒３のＢ端に配設する例を示したが、ガス供給配
管７を外筒３のＡ端に配設しても良い。つまりエキスパ
ンションを使用する排気ダクトや設備の制約等を考慮し
て、ガス供給配管７の位置や個数を適宜選択すれば良
い。Further, a cleaning gas is supplied to a gap between the outer cylinder 3 and the inner cylinder 2 via a gas supply pipe 7. When the cleaning gas is supplied to the gap between the outer cylinder 3 and the inner cylinder 2, the inner cylinder 2
This prevents dust in the dust-containing gas flowing inside from entering the gap between the outer cylinder 3 and the inner cylinder 2. FIG. 1B shows an example in which the gas supply pipe 7 is provided at the B end of the outer cylinder 3, but the gas supply pipe 7 may be provided at the A end of the outer cylinder 3. That is, the position and the number of the gas supply pipes 7 may be appropriately selected in consideration of the restrictions of the exhaust duct and the equipment using the expansion.
【００１５】また、溶融金属処理設備とダクトとの取り
合い（位置関係）や含塵ガスの流れ方向によっては、エ
キスパンション内の特定の位置に、特に粉塵が付着しや
すかったり、堆積しやすかったりすることがある。そこ
で図２に示すように、ガス供給配管７に局所配管10を配
設して、所定の位置に集中的に洗浄ガスを供給するよう
にしても良い。ただし本発明においては、局所配管10を
配設する位置は、図２に例示する間隙の下部に限定せ
ず、外筒３と内筒２との間隙の特定の位置に局所配管10
を配設して、洗浄ガスを供給すれば良い。[0015] Further, depending on the arrangement (positional relationship) between the molten metal processing equipment and the duct and the flow direction of the dust-containing gas, dust may easily adhere to a particular position in the expansion or may easily accumulate. There is. Therefore, as shown in FIG. 2, a local pipe 10 may be provided in the gas supply pipe 7 to supply the cleaning gas intensively to a predetermined position. However, in the present invention, the position where the local pipe 10 is disposed is not limited to the lower part of the gap illustrated in FIG. 2, and the local pipe 10 is located at a specific position in the gap between the outer cylinder 3 and the inner cylinder 2.
And a cleaning gas may be supplied.
【００１６】洗浄ガスの種類は特定の種類に限定せず、
内筒２内を流れる含塵ガスの成分や温度あるいは含塵ガ
ス中の粉塵の成分等を考慮して、それらと反応しない種
類のガスを選択すれば良い。たとえばArやＮ2 などの不
活性ガスや圧搾空気等を適宜選択して使用すれば良い。
こうして含塵ガスが内筒２内を流れているとき（すなわ
ち溶融金属の処理設備の操業中）に、洗浄ガスを外筒３
と内筒２との間隙に供給することによって、粉塵が侵入
するのを防止できる。また、粉塵が外筒３と内筒２との
間隙に侵入して堆積した場合は、含塵ガスが停止したと
き（すなわち溶融金属の処理設備が停止したとき）に、
洗浄ガスを外筒３と内筒２との間隙に供給することによ
って、粉塵を除去できる。The type of the cleaning gas is not limited to a specific type.
The type of gas that does not react with them may be selected in consideration of the component and temperature of the dust-containing gas flowing in the inner cylinder 2 or the dust component in the dust-containing gas. For example, an inert gas such as Ar or N 2 or compressed air may be appropriately selected and used.
In this way, when the dust-containing gas is flowing through the inner cylinder 2 (that is, during operation of the molten metal processing facility), the cleaning gas is supplied to the outer cylinder 3.
By supplying to the gap between the inner cylinder 2 and the inner cylinder 2, it is possible to prevent dust from entering. When the dust enters the gap between the outer cylinder 3 and the inner cylinder 2 and accumulates, when the dust-containing gas stops (ie, when the molten metal processing equipment stops),
By supplying the cleaning gas to the gap between the outer cylinder 3 and the inner cylinder 2, dust can be removed.
【００１７】本発明のエキスパンションは、外筒３と内
筒２との間隙に粉塵が侵入するのを効率的に防止し、か
つ除去できるのでベローズ４の破損は発生せず、エキス
パンションの寿命が延長され、しかも環境汚染や操業上
のトラブルを防止できる。本発明のエキスパンションを
溶融金属の処理設備の排気ダクトに配設する場合は、外
筒３と内筒２が一体的に固定されている端部（すなわち
図１(b) のＢ端）を必ずしも含塵ガスの流れの上流側に
向ける必要はなく、エキスパンションの取り付けを容易
に行なえる。The expansion of the present invention can effectively prevent dust from entering the gap between the outer cylinder 3 and the inner cylinder 2 and can remove the dust, so that the bellows 4 is not damaged and the life of the expansion is extended. In addition, environmental pollution and operational problems can be prevented. When the expansion of the present invention is disposed in the exhaust duct of the molten metal processing facility, the end where the outer cylinder 3 and the inner cylinder 2 are integrally fixed (that is, the B end in FIG. 1B) is not necessarily required. There is no need to direct the dust-containing gas to the upstream side, and the expansion can be easily installed.
【００１８】なお本発明のエキスパンションは、溶鋼の
真空処理設備等の処理量の大きい設備の排気ダクトに配
設すると、多大な経済的効果が得られるので好ましい。The expansion of the present invention is preferably disposed in an exhaust duct of equipment having a large throughput such as a vacuum processing equipment for molten steel, since a great economic effect can be obtained.
【００１９】[0019]
【実施例】転炉で溶製した溶鋼280tonを溶鋼鍋に受鋼
し、ＲＨ真空脱ガス装置を用いて真空脱ガス処理を行な
った。ＲＨ真空脱ガス装置の排気口と排気ダクトとの接
続部には図１あるいは図２に示す本発明のエキスパンシ
ョンを配設した。エキスパンションは、内筒２が固定さ
れていない端部（すなわち図１(b) のＡ端）を、ＲＨ真
空脱ガス装置から発生する含塵ガスの流れの上流側に向
けて配設した。EXAMPLE 280 tons of molten steel produced in a converter were received in a molten steel ladle and subjected to vacuum degassing using an RH vacuum degassing apparatus. The expansion of the present invention shown in FIG. 1 or FIG. 2 was provided at the connection between the exhaust port and the exhaust duct of the RH vacuum degassing apparatus. In the expansion, the end to which the inner cylinder 2 was not fixed (that is, the A end in FIG. 1B) was disposed toward the upstream side of the flow of the dust-containing gas generated from the RH vacuum degassing device.
【００２０】外筒３と内筒２との間隙に洗浄ガスを供給
する時期を、真空脱ガス処理の開始前から終了まで，真
空脱ガス処理の操業中から終了まで，または真空脱ガス
処理の終了後の３種類に分けて、それぞれについて１回
あたり15分の真空脱ガス処理を繰り返し行なった。これ
を発明例とする。また比較例として、図１に示すエキス
パンションを、発明例と同様に内筒２が固定されていな
い端部（すなわち図１(b) のＡ端）を、ＲＨ真空脱ガス
装置から発生する含塵ガスの流れの上流側に向けて配設
した。外筒３と内筒２との間隙には、洗浄ガスを供給せ
ず、セラミックファイバー製のシートを挿入し、１回あ
たり15分の真空脱ガス処理を繰り返し行なった。The cleaning gas is supplied to the gap between the outer cylinder 3 and the inner cylinder 2 from before the start of the vacuum degassing process to the end thereof, from the operation of the vacuum degassing process to the end thereof, or from the time of the vacuum degassing process. After the completion, the three types were subjected to a vacuum degassing treatment for 15 minutes each time. This is an example of the invention. As a comparative example, an expansion part shown in FIG. 1 was used, and an end portion to which the inner cylinder 2 was not fixed (namely, the A end in FIG. 1B) was dust-containing from an RH vacuum degassing apparatus. It was arranged upstream of the gas flow. A cleaning gas was not supplied to the gap between the outer cylinder 3 and the inner cylinder 2, and a sheet made of ceramic fiber was inserted, and a vacuum degassing process was repeated for 15 minutes each time.
【００２１】真空脱ガス処理を 150回程度行なうと溶鋼
鍋の耐火物が溶損するので、溶鋼鍋を２基準備してお
き、耐火物が溶損すると溶鋼鍋を交換して真空脱ガス処
理を繰り返し行なった。こうして発明例および比較例に
ついて外筒３が伸縮できなくなるまで真空脱ガス処理を
連続して行ない、その回数を測定した。その結果は表１
に示す通りである。If the vacuum degassing is performed about 150 times, the refractory in the molten steel pot is melted. Therefore, two molten steel pots are prepared, and when the refractory is melted, the molten steel pot is replaced and the vacuum degassing is performed. Repeated. In this way, vacuum degassing was continuously performed on the inventive examples and comparative examples until the outer cylinder 3 could no longer expand and contract, and the number of times was measured. Table 1 shows the results.
As shown in FIG.
【００２２】[0022]
【表１】 [Table 1]
【００２３】比較例では連続30回の真空脱ガス処理で外
筒３が伸縮できなくなったのに対して、発明例では連続
170〜300 回以上の真空脱ガス処理が可能であった。ま
た発明例１〜４を比べると、真空脱ガス処理の回数は、
発明例１が 170回で最も短かった。これは、発明例１
が、真空脱ガス処理中に洗浄ガスの供給を開始し、真空
脱ガス処理の終了まで洗浄ガスを供給して外筒３と内筒
２との間隙に供給した例であるので、真空脱ガス処理の
開始直後から洗浄ガスを供給するまでに、粉塵が外筒３
と内筒２との間隙に侵入して、間隙の下部に堆積したた
めである。In the comparative example, the outer cylinder 3 could not be expanded or contracted by the vacuum degassing process continuously 30 times, whereas in the invention example, the outer cylinder 3 could not be expanded or contracted.
170-300 or more vacuum degassing processes were possible. Also, when comparing invention examples 1 to 4, the number of times of the vacuum degassing process is as follows.
Invention Example 1 was the shortest at 170 times. This is Invention Example 1.
Is an example in which the supply of the cleaning gas is started during the vacuum degassing process, and the cleaning gas is supplied to the gap between the outer cylinder 3 and the inner cylinder 2 until the end of the vacuum degassing process. Immediately after the start of processing and before the supply of the cleaning gas,
This is because they entered the gap between the inner cylinder 2 and the inner cylinder 2 and accumulated at the lower part of the gap.
【００２４】発明例２は、真空脱ガス処理が終了した
後、洗浄ガスを供給して外筒３と内筒２との間隙に堆積
した粉塵を除去した例である。発明例３は真空脱ガス処
理の開始前から洗浄ガスを供給を開始し、真空脱ガス処
理の終了まで洗浄ガスを供給し続けた例である。いずれ
も外筒３と内筒２との間隙に粉塵が侵入して下部に堆積
したため、外筒３が伸縮できなくなったが、真空脱ガス
処理の回数は、発明例２が 220回、発明例３が 210回で
あり、同等のレベルであった。Inventive Example 2 is an example in which after the vacuum degassing process is completed, a cleaning gas is supplied to remove dust accumulated in the gap between the outer cylinder 3 and the inner cylinder 2. Invention Example 3 is an example in which the supply of the cleaning gas was started before the start of the vacuum degassing process, and the cleaning gas was continuously supplied until the end of the vacuum degassing process. In any case, dust entered the gap between the outer cylinder 3 and the inner cylinder 2 and accumulated at the lower part, so that the outer cylinder 3 could not expand or contract. However, the number of vacuum degassing processes was 220 in Example 2, and in Example 2. 3 were 210 times, the same level.
【００２５】発明例４は、外筒３と内筒２との間隙の下
部90°の範囲（すなわち垂直下方から両側に45°の範
囲）に局所配管10を配設して、真空脱ガス処理が終了し
た後、粉塵が堆積しやすい間隙の下部に洗浄ガスを局所
的に供給して粉塵を除去した例である。発明例４では、
真空脱ガス処理を 300回行なっても粉塵の堆積はなかっ
た。In Inventive Example 4, the local pipe 10 is disposed in a lower 90 ° range (ie, a range of 45 ° from below vertically to both sides) of the gap between the outer cylinder 3 and the inner cylinder 2 to perform a vacuum degassing process. This is an example in which the cleaning gas is locally supplied to the lower part of the gap where the dust tends to accumulate after the completion of the dust removal to remove the dust. In Invention Example 4,
There was no accumulation of dust even after 300 times of vacuum degassing.
【００２６】以上で説明した通り、本発明のエキスパン
ションは、内筒２が固定されていない端部（すなわち図
１(b) のＡ端）を含塵ガスの流れの上流側に向けて配設
した場合でも、エキスパンションの寿命が延長されるこ
とが確かめられた。したがって、外筒３と内筒２が一体
的に固定されている端部（すなわち図１(b) のＢ端）を
含塵ガスの流れの上流側に向けて配設すると、さらなる
効果が期待できることは明らかである。As described above, in the expansion of the present invention, the end to which the inner cylinder 2 is not fixed (ie, the end A in FIG. 1B) is arranged with the dust-containing gas flowing toward the upstream side. Even if it did, it was confirmed that the life of the expansion was extended. Therefore, if the end where the outer cylinder 3 and the inner cylinder 2 are integrally fixed (that is, the B end in FIG. 1B) is arranged toward the upstream side of the flow of the dust-containing gas, a further effect is expected. Clearly what you can do.
【００２７】[0027]
【発明の効果】本発明では、ベローズの破損を防止して
エキスパンションジョイントの寿命を延長できるので、
環境汚染の防止や安定した操業が達成できる。According to the present invention, the life of the expansion joint can be extended by preventing the bellows from being damaged.
Prevention of environmental pollution and stable operation can be achieved.
【図１】本発明のエキスパンションジョンイトの例を示
す断面図であり、(a) は横断面図であり、(b) は縦断面
図である。FIG. 1 is a cross-sectional view showing an example of an expansion joint according to the present invention, wherein (a) is a cross-sectional view and (b) is a longitudinal cross-sectional view.
【図２】本発明のエキスパンションジョンイトの他の例
を示す断面図であり、(a) は横断面図であり、(b) は縦
断面図である。FIG. 2 is a cross-sectional view showing another example of the expansion joint of the present invention, wherein (a) is a cross-sectional view and (b) is a longitudinal cross-sectional view.
１ フランジ 1' フランジ ２ 内筒 ３ 外筒 ４ ベローズ ５ 駆動装置 ６ ボルト孔 ７ ガス供給配管 ８ スペーサー ９ 耐火物 10 局所配管 DESCRIPTION OF SYMBOLS 1 Flange 1 'Flange 2 Inner cylinder 3 Outer cylinder 4 Bellows 5 Drive unit 6 Bolt hole 7 Gas supply piping 8 Spacer 9 Refractory 10 Local piping
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ２１Ｃ 7/10 Ｆ２７Ｄ 17/00 １０５Ｇ Ｂ０８Ｂ 9/02 Ｚ Ｆ２７Ｄ 17/00 １０５ 9/03 (72)発明者 鈴木 祐樹 千葉県千葉市中央区川崎町１番地 川崎製 鉄株式会社千葉製鉄所内 (72)発明者 寺畠 知道 千葉県千葉市中央区川崎町１番地 川崎製 鉄株式会社千葉製鉄所内 Ｆターム(参考） 3B116 AA13 BB33 BB62 CD11 3B117 AA01 4K002 BA09 4K013 CE09 CF00 4K056 AA02 AA05 CA01 DC07 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C21C 7/10 F27D 17/00 105G B08B 9/02 Z F27D 17/00 105 9/03 (72) Inventor Yuki Suzuki 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Chiba Works, Chiba Works 72 ) 3B116 AA13 BB33 BB62 CD11 3B117 AA01 4K002 BA09 4K013 CE09 CF00 4K056 AA02 AA05 CA01 DC07
Claims (3)
設される内筒とを有するエキスパンションジョイントで
あって、前記外筒と前記内筒との間隙に洗浄ガスを供給
するガス供給手段を有することを特徴とするエキスパン
ションジョイント。1. An expansion joint having a telescopic outer cylinder and an inner cylinder disposed inside the outer cylinder, wherein a gas for supplying a cleaning gas to a gap between the outer cylinder and the inner cylinder is provided. An expansion joint having supply means.
スを排気する排気ダクトであって、伸縮可能な外筒と、
前記外筒の内側に配設される内筒と、前記外筒および前
記内筒で形成される間隙に洗浄ガスを供給するガス供給
手段とを有するエキスパンションジョイントを、前記処
理設備の排気口と排気ダクトとの接続部に配設してなる
ことを特徴とする排気ダクト。2. An exhaust duct for exhausting dust-containing gas generated from molten metal processing equipment, comprising:
An expansion joint having an inner cylinder disposed inside the outer cylinder and gas supply means for supplying a cleaning gas to a gap formed by the outer cylinder and the inner cylinder is provided with an exhaust port of the processing equipment and an exhaust joint. An exhaust duct, which is provided at a connection portion with the duct.
を特徴とする請求項２に記載の排気ダクト。3. The exhaust duct according to claim 2, wherein the processing equipment is a vacuum processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000310786A JP2002113433A (en) | 2000-10-11 | 2000-10-11 | Expansion joint and exhaust duct using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000310786A JP2002113433A (en) | 2000-10-11 | 2000-10-11 | Expansion joint and exhaust duct using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002113433A true JP2002113433A (en) | 2002-04-16 |
Family
ID=18790674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000310786A Pending JP2002113433A (en) | 2000-10-11 | 2000-10-11 | Expansion joint and exhaust duct using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002113433A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101085201B1 (en) * | 2011-08-12 | 2011-11-21 | 합자회사 세화산업사 | Energy saving type cremator system |
| KR101185844B1 (en) | 2010-11-12 | 2012-10-05 | 주식회사 백송이앤티 | Drive system expansion joint apparatus for heat-gas emit of furnace and management method |
| KR101224388B1 (en) | 2010-10-21 | 2013-01-21 | 주식회사 백송이앤티 | Expansion joint apparatus for heat-gas emit of furnace |
| CN110527767A (en) * | 2019-08-14 | 2019-12-03 | 宝钢湛江钢铁有限公司 | A kind of dustproof construction for furnace top material tank for blast furnace |
-
2000
- 2000-10-11 JP JP2000310786A patent/JP2002113433A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101224388B1 (en) | 2010-10-21 | 2013-01-21 | 주식회사 백송이앤티 | Expansion joint apparatus for heat-gas emit of furnace |
| KR101185844B1 (en) | 2010-11-12 | 2012-10-05 | 주식회사 백송이앤티 | Drive system expansion joint apparatus for heat-gas emit of furnace and management method |
| KR101085201B1 (en) * | 2011-08-12 | 2011-11-21 | 합자회사 세화산업사 | Energy saving type cremator system |
| CN110527767A (en) * | 2019-08-14 | 2019-12-03 | 宝钢湛江钢铁有限公司 | A kind of dustproof construction for furnace top material tank for blast furnace |
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