JP4288806B2

JP4288806B2 - Water pressure test equipment

Info

Publication number: JP4288806B2
Application number: JP2000004590A
Authority: JP
Inventors: 富士広坂本; 照規西口; 忠英内海; 健夫水本; 満望月
Original assignee: IHI Corp
Current assignee: IHI Corp
Priority date: 2000-01-13
Filing date: 2000-01-13
Publication date: 2009-07-01
Anticipated expiration: 2020-01-13
Also published as: JP2001194263A

Description

【０００１】
【発明の属する技術分野】
本発明は、水圧試験装置に関するものである。
【０００２】
【従来の技術】
一般に、ボイラの炉壁は、図５に示される如く、複数の管１を所要間隔をあけて並設し且つフィン２で接続してなる炉壁管パネル３によって形成されているが、該炉壁管パネル３の水圧試験を行う際には、図６に示されるように、炉壁管パネル３の各管１の端部にＵ字管４を溶接して接続することにより、各管１の内部を直列に連通させ、該直列に連通させた管１の始端に水圧を付与するためのニップル等の管継手５を溶接して固着すると共に、前記管１の終端に閉塞用の栓部材６を溶接して固着した状態で、前記管継手５を固着した側から管１内に水圧を付与するようにしていた。
【０００３】
尚、前記栓部材６は、カップリング７にエア抜バルブ８を取り付けてなる構成を有しており、水圧試験を行うために、各管１内に水を張る際には、エア抜バルブ８を開いてエア抜きを行い、各管１内に水が充填された後、エア抜バルブ８を閉じるようになっている。
【０００４】
【発明が解決しようとする課題】
しかしながら、前述の如く、炉壁管パネル３の各管１の端部に管継手５とＵ字管４と栓部材６とを溶接して水圧試験を行うのでは、管１の本数が非常にたくさんあって溶接に手間がかかると共に、専門の溶接士の手配が必要になり、しかも、水圧試験完了後には、溶接された管継手５とＵ字管４と栓部材６とを切断してから、炉壁管パネル３の各管１の端部に、他の炉壁管パネル３と接続するための開先加工を行い、更に、各管１の内部清掃等を行わねばならず、かなり多くの工数がかかるという欠点を有していた。
【０００５】
本発明は、斯かる実情に鑑み、炉壁管パネルの各管の端部に管継手とＵ字管と栓部材とを溶接することを不要とし得、専門の溶接士がいなくても水圧試験を行うことができ、しかも、水圧試験完了後に管継手とＵ字管と栓部材とを切断することを不要とし得、炉壁管パネルの製造段階で予め各管の端部に開先加工を行うことができ、全体として作業工数の低減を図り得ると共に、繰り返し使用することもできる水圧試験装置を提供しようとするものである。
【０００６】
【課題を解決するための手段】
本発明は、複数の管を所要間隔をあけて並設し且つフィンで接続してなる炉壁管パネルの各管の端部をＵ字管で接続することにより、各管の内部を直列に連通させ、該直列に連通させた管の始端に水圧を付与するための管継手を固着すると共に、前記管の終端に閉塞用の栓部材を固着した状態で、前記管継手を固着した側から管内に水圧を付与するよう構成した水圧試験装置において、
管継手の端部とＵ字管の両端部と栓部材の端部とにそれぞれ、管内径より所要量だけ小さい外径の小径部と、該小径部の先端に形成され且つ管内に挿入可能な大径部とを有する短管を接続し、該短管の大径部に形成した環状溝に水のシール部材を取り付けると共に、前記短管の小径部に、該短管の管の端部への挿入時に短管の小径部外周面と管の端部内周面との間隙に嵌入され且つ短管に加わる軸方向の力を支持するためのロック部材を配設したことを特徴とする水圧試験装置にかかるものである。
【０００７】
前記水圧試験装置においては、管の端部内周面と短管との間に挿入され且つ内周面に先端側へ向け漸次内径が小さくなるようテーパ面が形成されたアウタリング本体と、該アウタリング本体の基端部から外周側へ張り出して管の端面に係合するアウタフランジ部と、前記アウタリング本体及びアウタフランジ部の周方向所要箇所に軸線方向へ延びるよう形成されたアウタスリットと、前記アウタフランジ部における周方向所要箇所に穿設されたネジ孔とを有するアウタリングと、該アウタリングの内周面と短管の外周面との間に挿入され且つ外周面に前記アウタリングのテーパ面に倣うテーパ面が形成されたインナリング本体と、該インナリング本体の基端部から外周側へ張り出すインナフランジ部と、前記インナリング本体及びインナフランジ部の周方向所要箇所に軸線方向ヘ延びるよう形成されたインナスリットと、前記インナフランジ部における前記アウタフランジ部のネジ孔に対応する周方向所要箇所に穿設された貫通孔とを有するインナリングと、
短管の管の端部への挿入時に短管の小径部外周面と管の端部内周面との間隙にアウタリングとインナリングとが挿入された状態で、前記インナフランジ部の貫通孔を貫通してアウタフランジ部のネジ孔に締め込まれるロックボルトとから
ロック部材を構成することができる。
【０００８】
更に、インナフランジ部の周方向所要箇所にロック解除ボルトが締め込まれるロック解除ネジ孔を穿設することもできる。
【０００９】
上記手段によれば、以下のような作用が得られる。
【００１０】
管継手の端部とＵ字管の両端部と栓部材の端部とにそれぞれ、管内径より所要量だけ小さい外径の小径部と、該小径部の先端に形成され且つ管内に挿入可能な大径部とを有する短管を接続し、該短管の大径部に形成した環状溝に水のシール部材を取り付けると共に、前記短管の小径部に、該短管の管の端部への挿入時に短管の小径部外周面と管の端部内周面との間隙に嵌入され且つ短管に加わる軸方向の力を支持するためのロック部材を配設すると、水圧試験の際に、水の漏洩はシール部材によって防止されつつ、短管に加わる軸方向の力はロック部材によって確実に負担される形となり、従来のように、炉壁管パネルの各管の端部に管継手とＵ字管と栓部材とを溶接して水圧試験を行うのとは異なり、溶接の手間が省けると共に、専門の溶接士の手配が不要になり、しかも、水圧試験完了後には、溶接された管継手とＵ字管と栓部材とを切断しなくて済むため、水圧試験を実施する前の炉壁管パネルの製造段階において、各管の端部に他の炉壁管パネルと接続するための開先加工を予め行っておくことが可能となり、全体として作業工数が低減され、更に、管継手とＵ字管と栓部材とを繰り返し使用することも可能となる。
【００１１】
前記水圧試験装置において、管の端部内周面と短管との間に挿入され且つ内周面に先端側へ向け漸次内径が小さくなるようテーパ面が形成されたアウタリング本体と、該アウタリング本体の基端部から外周側へ張り出して管の端面に係合するアウタフランジ部と、前記アウタリング本体及びアウタフランジ部の周方向所要箇所に軸線方向へ延びるよう形成されたアウタスリットと、前記アウタフランジ部における周方向所要箇所に穿設されたネジ孔とを有するアウタリングと、
該アウタリングの内周面と短管の外周面との間に挿入され且つ外周面に前記アウタリングのテーパ面に倣うテーパ面が形成されたインナリング本体と、該インナリング本体の基端部から外周側へ張り出すインナフランジ部と、前記インナリング本体及びインナフランジ部の周方向所要箇所に軸線方向ヘ延びるよう形成されたインナスリットと、前記インナフランジ部における前記アウタフランジ部のネジ孔に対応する周方向所要箇所に穿設された貫通孔とを有するインナリングと、
短管の管の端部への挿入時に短管の小径部外周面と管の端部内周面との間隙にアウタリングとインナリングとが挿入された状態で、前記インナフランジ部の貫通孔を貫通してアウタフランジ部のネジ孔に締め込まれるロックボルトとから
ロック部材を構成すると、
管継手の端部とＵ字管の両端部と栓部材の端部とにそれぞれ接続された短管及びロック部材を管の端部に挿入した状態で、ロックボルトをインナフランジ部の貫通孔を貫通させてアウタフランジ部のネジ孔に締め込むと、ロック部材のインナリングがアウタリングの内周面と短管の外周面との間に食い込むように挿入されて行き、互いに係合するテーパ面による楔効果によって、アウタスリットが形成されたアウタリングが拡張し、該アウタリングのアウタリング本体外周面が管の内周面に密着すると共に、前記楔効果によって、インナスリットが形成されたインナリングが収縮し、該インナリングのインナリング本体内周面が短管の小径部外周面に密着する形となり、これにより、炉壁管パネルの各管の内部をＵ字管を介して直列に連通させ、該直列に連通させた管の始端に水圧を付与するための管継手を固着すると共に、前記管の終端に閉塞用の栓部材を固着した状態とすることが可能となる。
【００１２】
更に、インナフランジ部の周方向所要箇所にロック解除ボルトが締め込まれるロック解除ネジ孔を穿設すると、水圧試験完了後に、ロックボルトを緩めて取り外し、ロック部材のアウタリングに対するインナリングの嵌合状態を解除し、各管の端部から管継手とＵ字管と栓部材とを、短管を引き抜くようにして、それぞれ取り外す際、前記ロック部材のアウタリングに対するインナリングの嵌合状態が強固となっていて、単にロックボルトを緩めただけではロック部材を取り外すことが難しくなっているような場合に、前記ロック解除ネジ孔にロック解除ボルトを締め込んで行くようにすれば、該ロック解除ボルトの先端がアウタリングのアウタフランジ部の端面に当接した後、インナリングのインナフランジ部がアウタリングのアウタフランジ部から引き離される方向へ移動する形となり、前記ロック部材を容易且つ確実に取り外すことが可能となる。
【００１３】
【発明の実施の形態】
以下、本発明の実施の形態を図示例と共に説明する。
【００１４】
図１〜図４は本発明を実施する形態の一例であって、図中、図５及び図６と同一の符号を付した部分は同一物を表わしており、基本的な構成は図５及び図６に示す従来のものと同様であるが、本図示例の特徴とするところは、図１〜図４に示す如く、管継手５の端部とＵ字管４の両端部と栓部材６の端部とにそれぞれ、管１の内径より所要量だけ小さい外径の小径部９と、該小径部９の先端に形成され且つ管１内に挿入可能な大径部１０とを有する短管１１を接続し、該短管１１の大径部１０に形成した環状溝１２にＯリング等の水のシール部材１３を取り付けると共に、前記短管１１の小径部９に、該短管１１の管１の端部への挿入時に短管１１の小径部９外周面と管１の端部内周面との間隙に嵌入され且つ短管１１に加わる軸方向の力を支持するためのロック部材１４を配設した点にある。
【００１５】
前記ロック部材１４は、図２〜図４に示すように、
管１の端部内周面と短管１１との間に挿入され且つ内周面に先端側へ向け漸次内径が小さくなるようテーパ面１５が形成されたアウタリング本体１６と、該アウタリング本体１６の基端部から外周側へ張り出して管１の端面に係合するアウタフランジ部１７と、前記アウタリング本体１６及びアウタフランジ部１７の周方向所要箇所に軸線方向へ延びるよう形成されたアウタスリット１８と、前記アウタフランジ部１７における周方向所要箇所（図３の例では六箇所）に穿設されたネジ孔１９とを有するアウタリング２０と、
該アウタリング２０の内周面と短管１１の外周面との間に挿入され且つ外周面に前記アウタリング２０のテーパ面１５に倣うテーパ面２１が形成されたインナリング本体２２と、該インナリング本体２２の基端部から外周側へ張り出すインナフランジ部２３と、前記インナリング本体２２及びインナフランジ部２３の周方向所要箇所に軸線方向ヘ延びるよう形成されたインナスリット２４と、前記インナフランジ部２３における前記アウタフランジ部１７のネジ孔１９に対応する周方向所要箇所に穿設された貫通孔２５とを有するインナリング２６と、
短管１１の管１の端部への挿入時に短管１１の小径部９外周面と管１の端部内周面との間隙にアウタリング２０とインナリング２６とが挿入された状態で、前記インナフランジ部２３の貫通孔２５を貫通してアウタフランジ部１７のネジ孔１９に締め込まれる六角穴付ボルト等のロックボルト２７と
を備えてなる構成を有している。
【００１６】
前記インナフランジ部２３の周方向所要箇所（図４の例では三箇所）には、ロック解除ボルト２８が締め込まれるロック解除ネジ孔２９を穿設してある。
【００１７】
尚、前記短管１１の大径部１０に形成した環状溝１２内には、シール部材１３のバックアップリング３０を装填してある。
【００１８】
次に、上記図示例の作動を説明する。
【００１９】
先ず、管継手５の端部とＵ字管４の両端部と栓部材６の端部とにそれぞれ接続された短管１１及びロック部材１４を、図２に示す如く、管１の端部に挿入した状態で、ロックボルト２７をインナフランジ部２３の貫通孔２５を貫通させてアウタフランジ部１７のネジ孔１９に締め込むと、ロック部材１４のインナリング２６がアウタリング２０の内周面と短管１１の外周面との間に食い込むように挿入されて行き、互いに係合するテーパ面１５，２１による楔効果によって、アウタスリット１８が形成されたアウタリング２０が拡張し、該アウタリング２０のアウタリング本体１６外周面が管１の内周面に密着すると共に、前記楔効果によって、インナスリット２４が形成されたインナリング２６が収縮し、該インナリング２６のインナリング本体２２内周面が短管１１の小径部９外周面に密着する形となり、これにより、炉壁管パネル３の各管１の内部をＵ字管４を介して直列に連通させ、該直列に連通させた管１の始端に水圧を付与するためのニップル等の管継手５を固着すると共に、前記管１の終端に閉塞用の栓部材６を固着した状態とする。
【００２０】
この後、栓部材６のエア抜バルブ８を開いてエア抜きを行いつつ、管継手５を固着した側から管１内に水を張り、各管１内に水が充填された後、前記エア抜バルブ８を閉じ、所定の水圧を付与し、水圧試験を実施する。
【００２１】
ここで、例えば、水圧試験圧力がＰ＝５００［ｋｇｆ／ｃｍ²］（９．８×５×１０⁶［Ｐａ］）以下の場合に、管１の内径をＤ［ｃｍ］とすると、短管１１に加わる軸方向の力Ｆは、単純計算で、
【数１】
Ｆ＝（π・Ｄ²／４）×Ｐ［ｋｇｆ］
≒９．８×（π・Ｄ²／４）×Ｐ［Ｎ］
となるが、本図示例の水圧試験装置では、水圧試験の際に、水の漏洩はシール部材１３によって防止されつつ、短管１１に加わる軸方向の力Ｆはロック部材１４によって確実に負担される形となり、水圧試験圧力が高圧であっても、水圧に充分に耐え且つ水の漏洩を確実に防止可能となることが確認されている。
【００２２】
水圧試験完了後には、ロックボルト２７を緩めて取り外し、ロック部材１４のアウタリング２０に対するインナリング２６の嵌合状態を解除し、各管１の端部から管継手５とＵ字管４と栓部材６とを、短管１１を引き抜くようにして、それぞれ取り外す。
【００２３】
ここで、前記ロック部材１４のアウタリング２０に対するインナリング２６の嵌合状態が強固となっていて、単にロックボルト２７を緩めただけではロック部材１４を取り外すことが難しくなっているような場合には、前記インナフランジ部２３の周方向所要箇所に穿設したロック解除ネジ孔２９にロック解除ボルト２８を締め込んで行くと、該ロック解除ボルト２８の先端がアウタリング２０のアウタフランジ部１７の端面に当接した後、インナリング２６のインナフランジ部２３がアウタリング２０のアウタフランジ部１７から引き離される方向へ移動する形となり、前記ロック部材１４を容易且つ確実に取り外すことが可能となる。
【００２４】
この結果、従来のように、炉壁管パネル３の各管１の端部に管継手５とＵ字管４と栓部材６とを溶接して水圧試験を行うのとは異なり、溶接の手間が省けると共に、専門の溶接士の手配が不要になり、しかも、水圧試験完了後には、溶接された管継手５とＵ字管４と栓部材６とを切断しなくて済むため、水圧試験を実施する前の炉壁管パネル３の製造段階において、各管１の端部に他の炉壁管パネル３と接続するための開先加工を予め行っておくことが可能となり、全体として作業工数が低減され、更に、管継手５とＵ字管４と栓部材６とを繰り返し使用することも可能となる。
【００２５】
こうして、炉壁管パネル３の各管１の端部に管継手５とＵ字管４と栓部材６とを溶接することを不要とし得、専門の溶接士がいなくても水圧試験を行うことができ、しかも、水圧試験完了後に管継手５とＵ字管４と栓部材６とを切断することを不要とし得、炉壁管パネル３の製造段階で予め各管１の端部に開先加工を行うことができ、全体として作業工数の低減を図り得ると共に、繰り返し使用することもできる。
【００２６】
尚、本発明の水圧試験装置は、上述の図示例にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
【００２７】
【発明の効果】
以上、説明したように本発明の請求項１〜３記載の水圧試験装置によれば、炉壁管パネルの各管の端部に管継手とＵ字管と栓部材とを溶接することを不要とし得、専門の溶接士がいなくても水圧試験を行うことができ、しかも、水圧試験完了後に管継手とＵ字管と栓部材とを切断することを不要とし得、炉壁管パネルの製造段階で予め各管の端部に開先加工を行うことができ、全体として作業工数の低減を図り得ると共に、繰り返し使用することもできるという優れた効果を奏し得る。
【図面の簡単な説明】
【図１】本発明を実施する形態の一例の平面図である。
【図２】本発明を実施する形態の一例の要部拡大断面図であって、図１のＩＩ部相当図である。
【図３】本発明を実施する形態の一例におけるアウタリングの正面図であって、図２のＩＩＩ−ＩＩＩ矢視相当図である。
【図４】本発明を実施する形態の一例におけるインナリングの正面図であって、図２のＩＶ−ＩＶ矢視相当図である。
【図５】ボイラの炉壁管パネルを表わす断面図である。
【図６】従来の水圧試験装置の一例を表わす平面図である。
【符号の説明】
１管
２フィン
３炉壁管パネル
４Ｕ字管
５管継手
６栓部材
９小径部
１０大径部
１１短管
１２環状溝
１３シール部材
１４ロック部材
１５テーパ面
１６アウタリング本体
１７アウタフランジ部
１８アウタスリット
１９ネジ孔
２０アウタリング
２１テーパ面
２２インナリング本体
２３インナフランジ部
２４インナスリット
２５貫通孔
２６インナリング
２７ロックボルト
２８ロック解除ボルト
２９ロック解除ネジ孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water pressure test apparatus.
[0002]
[Prior art]
In general, as shown in FIG. 5, the furnace wall of a boiler is formed by a furnace wall tube panel 3 in which a plurality of tubes 1 are juxtaposed at predetermined intervals and connected by fins 2. When performing the water pressure test of the wall tube panel 3, as shown in FIG. 6, each tube 1 is welded to the end of each tube 1 of the furnace wall tube panel 3 by welding. The pipe 1 is connected in series, and a pipe joint 5 such as a nipple for applying water pressure is welded and fixed to the start end of the pipe 1 connected in series, and a plug member for closing is attached to the end of the pipe 1. The water pressure was applied to the pipe 1 from the side where the pipe joint 5 was fixed in a state where the pipe 6 was fixed by welding.
[0003]
The plug member 6 has a configuration in which an air vent valve 8 is attached to the coupling 7, and when water is filled in each pipe 1 in order to perform a water pressure test, the air vent valve 8. The air vent valve 8 is closed and the air vent valve 8 is closed after each pipe 1 is filled with water.
[0004]
[Problems to be solved by the invention]
However, as described above, when the water pressure test is performed by welding the pipe joint 5, the U-shaped pipe 4, and the plug member 6 to the end of each pipe 1 of the furnace wall pipe panel 3, the number of the pipes 1 is very large. It takes a lot of time and effort to weld, and it is necessary to arrange a special welder. After the water pressure test is completed, the welded pipe joint 5, U-tube 4 and plug member 6 are cut off. The end of each tube 1 of the furnace wall tube panel 3 must be grooved for connection to other furnace wall tube panels 3, and the interior of each tube 1 must be cleaned, which is considerably large. It has the disadvantage that it takes a lot of man-hours.
[0005]
In view of such circumstances, the present invention can eliminate the need to weld a pipe joint, a U-shaped tube, and a plug member to the end of each tube of the furnace wall tube panel, and can perform a water pressure test without a specialized welder. In addition, it is not necessary to cut the pipe joint, U-shaped pipe, and plug member after the hydraulic pressure test is completed, and the end of each pipe is pre-fabricated at the manufacturing stage of the furnace wall tube panel. It is an object of the present invention to provide a hydraulic pressure test apparatus that can be used and can reduce the number of work steps as a whole and can be used repeatedly.
[0006]
[Means for Solving the Problems]
In the present invention, a plurality of tubes are juxtaposed at predetermined intervals, and the ends of each tube of a furnace wall tube panel formed by connecting fins are connected by U-shaped tubes so that the inside of each tube is connected in series. The pipe joint for applying water pressure is fixed to the start end of the pipe connected in series, and the plug joint for closing is fixed to the terminal end of the pipe, and from the side where the pipe joint is fixed. In a water pressure test apparatus configured to apply water pressure in a pipe,
A small-diameter portion having an outer diameter smaller than the inner diameter of the tube by a required amount and an end of the small-diameter portion at the end of the pipe joint, the both ends of the U-shaped tube, and the end of the plug member can be inserted into the tube. A short pipe having a large diameter portion is connected, a water seal member is attached to an annular groove formed in the large diameter portion of the short pipe, and the small diameter portion of the short pipe is connected to the end of the short pipe. A hydraulic pressure test is characterized in that a lock member is provided to support the axial force applied to the short pipe, which is inserted into the gap between the outer peripheral surface of the small-diameter portion of the short pipe and the inner peripheral surface of the end of the pipe at the time of insertion. It depends on the device.
[0007]
In the water pressure test apparatus, an outer ring main body inserted between the inner peripheral surface of the end portion of the tube and the short tube and having a tapered surface formed on the inner peripheral surface so that the inner diameter gradually decreases toward the tip side, and the outer An outer flange portion that protrudes from the base end portion of the ring main body to the outer peripheral side and engages with an end surface of the pipe, and an outer slit that is formed to extend in the axial direction at a required position in the circumferential direction of the outer ring main body and the outer flange portion; An outer ring having a screw hole drilled at a required position in the circumferential direction in the outer flange portion, and inserted between the outer peripheral surface of the outer ring and the outer peripheral surface of the short pipe, and the outer ring An inner ring body having a tapered surface that follows the tapered surface, an inner flange portion that projects from the base end portion of the inner ring body to the outer peripheral side, the inner ring body, and the inner frame An inner slit formed to extend in the axial direction at a required position in the circumferential direction of the flange portion, and a through hole formed at a required position in the circumferential direction corresponding to the screw hole of the outer flange portion in the inner flange portion Ring,
When the outer pipe and the inner ring are inserted into the gap between the outer peripheral surface of the small-diameter portion of the short pipe and the inner peripheral surface of the end of the short pipe when the short pipe is inserted into the end of the pipe, the through hole of the inner flange is formed. The lock member can be configured from a lock bolt that passes through and is tightened into the screw hole of the outer flange portion.
[0008]
Furthermore, a lock release screw hole into which the lock release bolt is tightened can be formed at a required position in the circumferential direction of the inner flange portion.
[0009]
According to the above means, the following operation can be obtained.
[0010]
A small-diameter portion having an outer diameter smaller than the inner diameter of the tube by a required amount and an end of the small-diameter portion at the end of the pipe joint, the both ends of the U-shaped tube, and the end of the plug member can be inserted into the tube. A short pipe having a large diameter portion is connected, a water seal member is attached to an annular groove formed in the large diameter portion of the short pipe, and the small diameter portion of the short pipe is connected to the end of the short pipe. When a lock member is inserted into the gap between the outer peripheral surface of the small-diameter portion of the short tube and the inner peripheral surface of the end of the tube and supports the axial force applied to the short tube at the time of insertion, the water pressure test, While the leakage of water is prevented by the seal member, the axial force applied to the short pipe is surely borne by the lock member. Unlike performing a water pressure test by welding a U-shaped tube and a plug member, the labor of welding can be saved and a specialized solution can be used. It is no longer necessary to arrange an engineer, and it is not necessary to cut the welded pipe joint, U-tube and plug member after completion of the water pressure test, so the manufacture of furnace wall tube panels before the water pressure test is performed. In the stage, it becomes possible to perform the groove processing for connecting with the other furnace wall tube panel at the end of each tube in advance, the work man-hour is reduced as a whole, and further, the pipe joint and the U-shaped tube It is also possible to repeatedly use the plug member.
[0011]
In the water pressure test apparatus, an outer ring body inserted between the inner peripheral surface of the end portion of the tube and the short tube and having a tapered surface formed on the inner peripheral surface so that the inner diameter gradually decreases toward the tip side, and the outer ring An outer flange portion that protrudes from the base end portion of the main body to the outer peripheral side and engages with an end surface of the pipe, an outer slit that is formed to extend in an axial direction at a required circumferential position of the outer ring main body and the outer flange portion, and An outer ring having a threaded hole drilled at a required position in the circumferential direction of the outer flange portion;
An inner ring body that is inserted between the inner peripheral surface of the outer ring and the outer peripheral surface of the short tube and has a tapered surface that follows the tapered surface of the outer ring on the outer peripheral surface; and a base end portion of the inner ring main body An inner flange portion projecting from the outer periphery to the outer peripheral side, an inner slit formed to extend in the axial direction at a required position in the circumferential direction of the inner ring main body and the inner flange portion, and a screw hole of the outer flange portion in the inner flange portion An inner ring having a through hole drilled in a corresponding circumferential required place;
When the outer pipe and the inner ring are inserted into the gap between the outer peripheral surface of the small-diameter portion of the short pipe and the inner peripheral surface of the end of the short pipe when the short pipe is inserted into the end of the pipe, the through hole of the inner flange is formed. When configuring the lock member from the lock bolt that penetrates and is tightened into the screw hole of the outer flange portion,
With the short pipe and lock member connected to the end of the pipe joint, both ends of the U-shaped pipe and the end of the plug member inserted into the end of the pipe, the lock bolt is inserted into the through hole of the inner flange. When it is penetrated and tightened into the screw hole of the outer flange part, the inner ring of the lock member is inserted so as to bite between the inner peripheral surface of the outer ring and the outer peripheral surface of the short tube, and the tapered surfaces engage with each other The outer ring in which the outer slit is formed is expanded by the wedge effect by the outer ring, the outer ring main body outer peripheral surface of the outer ring is in close contact with the inner peripheral surface of the pipe, and the inner slit is formed by the wedge effect. The inner ring inner peripheral surface of the inner ring comes into close contact with the outer peripheral surface of the small-diameter portion of the short tube, and thereby the inside of each tube of the furnace wall tube panel is connected in series via the U-shaped tube. Passed , Together to secure the pipe fitting for providing water pressure to the starting end of the tubes communicates with the said series, it is possible to state that fixing a stopper member for closure at the end of the tube.
[0012]
Furthermore, if a lock release screw hole is formed in the inner flange part where the lock release bolt is tightened, the lock bolt is loosened and removed after the hydraulic pressure test is completed, and the inner ring is fitted to the outer ring of the lock member. When the state is released and the pipe joint, the U-shaped tube, and the plug member are removed from the end of each tube by pulling out the short tube, the inner ring is firmly fitted to the outer ring of the lock member. If it is difficult to remove the lock member simply by loosening the lock bolt, if the lock release bolt is tightened into the lock release screw hole, the lock release After the tip of the bolt contacts the end surface of the outer flange portion of the outer ring, the inner flange portion of the inner ring Will form which moves in the direction pulled away from the di portion, it is possible to remove the locking member easily and reliably.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described together with illustrated examples.
[0014]
1 to 4 show an example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 5 and 6 denote the same components, and the basic configuration is shown in FIGS. Although it is the same as the conventional one shown in FIG. 6, the features of the illustrated example are as shown in FIGS. 1 to 4, the end of the pipe joint 5, both ends of the U-shaped tube 4, and the plug member 6. A short pipe having an outer diameter small diameter portion 9 smaller than the inner diameter of the tube 1 and a large diameter portion 10 formed at the tip of the small diameter portion 9 and insertable into the tube 1. 11, a water seal member 13 such as an O-ring is attached to an annular groove 12 formed in the large diameter portion 10 of the short tube 11, and the tube of the short tube 11 is connected to the small diameter portion 9 of the short tube 11. The axial force applied to the short tube 11 is inserted into the gap between the outer peripheral surface of the small diameter portion 9 of the short tube 11 and the inner peripheral surface of the end portion of the tube 1 when inserted into the end of the first tube 11. There locking member 14 for lifting in that disposed.
[0015]
As shown in FIG. 2 to FIG.
An outer ring main body 16 inserted between the inner peripheral surface of the end portion of the tube 1 and the short tube 11 and having a tapered surface 15 formed on the inner peripheral surface so that the inner diameter gradually decreases toward the distal end side, and the outer ring main body 16 An outer flange portion 17 that projects from the base end portion of the tube 1 to the outer peripheral side and engages with the end surface of the tube 1, and an outer slit that is formed to extend in the axial direction at a required circumferential position of the outer ring main body 16 and the outer flange portion 17. 18 and an outer ring 20 having threaded holes 19 drilled at circumferentially required locations (six locations in the example of FIG. 3) in the outer flange portion 17;
An inner ring main body 22 inserted between the inner peripheral surface of the outer ring 20 and the outer peripheral surface of the short tube 11 and having a tapered surface 21 formed on the outer peripheral surface following the tapered surface 15 of the outer ring 20; An inner flange portion 23 projecting from the base end portion of the ring main body 22 to the outer peripheral side, an inner slit 24 formed to extend in an axial direction at a required position in the circumferential direction of the inner ring main body 22 and the inner flange portion 23, and the inner An inner ring 26 having a through hole 25 drilled at a required position in the circumferential direction corresponding to the screw hole 19 of the outer flange portion 17 in the flange portion 23;
In the state where the outer ring 20 and the inner ring 26 are inserted into the gap between the outer peripheral surface of the small diameter portion 9 of the short tube 11 and the inner peripheral surface of the end portion of the tube 1 when the short tube 11 is inserted into the end of the tube 1, A lock bolt 27 such as a hexagon socket head cap screw that passes through the through hole 25 of the inner flange portion 23 and is tightened into the screw hole 19 of the outer flange portion 17 is provided.
[0016]
Lock release screw holes 29 into which the lock release bolts 28 are tightened are formed at required locations in the circumferential direction of the inner flange portion 23 (three locations in the example of FIG. 4).
[0017]
A backup ring 30 of the seal member 13 is loaded in the annular groove 12 formed in the large diameter portion 10 of the short pipe 11.
[0018]
Next, the operation of the illustrated example will be described.
[0019]
First, the short pipe 11 and the lock member 14 respectively connected to the end of the pipe joint 5, both ends of the U-shaped pipe 4, and the end of the plug member 6 are connected to the end of the pipe 1 as shown in FIG. 2. When the lock bolt 27 is inserted through the through hole 25 of the inner flange portion 23 and tightened into the screw hole 19 of the outer flange portion 17, the inner ring 26 of the lock member 14 and the inner peripheral surface of the outer ring 20 are The outer ring 20 in which the outer slit 18 is formed is expanded by the wedge effect of the tapered surfaces 15 and 21 that are inserted so as to bite into the outer peripheral surface of the short pipe 11 and engage with each other. The outer ring main body 16 has an outer peripheral surface that is in close contact with the inner peripheral surface of the tube 1, and the inner ring 26 in which the inner slit 24 is formed contracts due to the wedge effect. The inner peripheral surface of the main body 22 is in close contact with the outer peripheral surface of the small-diameter portion 9 of the short tube 11, whereby the inside of each tube 1 of the furnace wall tube panel 3 is communicated in series via the U-shaped tube 4. A pipe joint 5 such as a nipple for applying water pressure is fixed to the start end of the pipe 1 communicated with the pipe 1, and a closing plug member 6 is fixed to the end of the pipe 1.
[0020]
Thereafter, the air release valve 8 of the plug member 6 is opened to release the air, and water is filled into the pipe 1 from the side where the pipe joint 5 is fixed, and each pipe 1 is filled with water. The extraction valve 8 is closed, a predetermined water pressure is applied, and a water pressure test is performed.
[0021]
Here, for example, when the water pressure test pressure is P = 500 [kgf / cm ² ] (9.8 × 5 × 10 ⁶ [Pa]) or less, and the inner diameter of the tube 1 is D [cm], the short tube The axial force F applied to 11 is a simple calculation,
[Expression 1]
^{F = (π · D 2/} 4) × P [kgf]
^{≒ 9.8 × (π · D 2} /4) × P [N]
However, in the water pressure test apparatus of the illustrated example, during the water pressure test, leakage of water is prevented by the seal member 13 while the axial force F applied to the short tube 11 is reliably borne by the lock member 14. It has been confirmed that even if the water pressure test pressure is high, it can sufficiently withstand the water pressure and reliably prevent water leakage.
[0022]
After completion of the water pressure test, the lock bolt 27 is loosened and removed to release the fitting state of the inner ring 26 with respect to the outer ring 20 of the lock member 14, and the pipe joint 5, the U-shaped pipe 4, and the plug from the end of each pipe 1. The members 6 are respectively removed by pulling out the short tubes 11.
[0023]
Here, when the fitting state of the inner ring 26 with respect to the outer ring 20 of the lock member 14 is strong, and it is difficult to remove the lock member 14 simply by loosening the lock bolt 27. When the lock release bolt 28 is tightened into the lock release screw hole 29 drilled at a required position in the circumferential direction of the inner flange portion 23, the tip of the lock release bolt 28 is connected to the outer flange portion 17 of the outer ring 20. After coming into contact with the end face, the inner flange portion 23 of the inner ring 26 moves in a direction away from the outer flange portion 17 of the outer ring 20, and the lock member 14 can be easily and reliably removed.
[0024]
As a result, unlike the conventional case, the welding test is different from the conventional case where the pipe joint 5, the U-shaped tube 4 and the plug member 6 are welded to the end of each tube 1 of the furnace wall tube panel 3 and the water pressure test is performed. This eliminates the need for special welders and eliminates the need to cut the welded pipe joint 5, U-tube 4, and plug member 6 after completion of the water pressure test. In the manufacturing stage of the furnace wall tube panel 3 before implementation, it becomes possible to perform a groove processing for connecting to the other furnace wall tube panel 3 at the end of each tube 1 in advance, and the number of work steps as a whole Further, the pipe joint 5, the U-shaped pipe 4 and the plug member 6 can be used repeatedly.
[0025]
Thus, it is possible to eliminate the need to weld the pipe joint 5, the U-shaped tube 4 and the plug member 6 to the end of each tube 1 of the furnace wall tube panel 3, and perform a water pressure test without a specialized welder. In addition, it is possible to eliminate the need to cut the pipe joint 5, the U-shaped pipe 4 and the plug member 6 after the hydraulic pressure test is completed, and at the manufacturing stage of the furnace wall pipe panel 3, a groove is provided in advance at the end of each pipe 1. Processing can be performed, and the number of working steps can be reduced as a whole, and the processing can be used repeatedly.
[0026]
In addition, the water pressure test apparatus of this invention is not limited only to the above-mentioned illustration example, Of course, a various change can be added in the range which does not deviate from the summary of this invention.
[0027]
【The invention's effect】
As described above, according to the hydraulic pressure test apparatus according to claims 1 to 3 of the present invention, it is not necessary to weld the pipe joint, the U-shaped pipe, and the plug member to the end of each pipe of the furnace wall pipe panel. It is possible to perform a water pressure test without a specialized welder, and it is not necessary to cut the pipe joint, U-shaped tube and plug member after the water pressure test is completed. It is possible to perform groove processing on the end of each pipe in advance at the stage, so that it is possible to reduce the number of work steps as a whole and to achieve an excellent effect that it can be used repeatedly.
[Brief description of the drawings]
FIG. 1 is a plan view of an example of an embodiment for carrying out the present invention.
2 is an enlarged cross-sectional view of a main part of an example of an embodiment for carrying out the present invention, and is a view corresponding to a II part of FIG.
3 is a front view of an outer ring in an example of an embodiment for carrying out the present invention, and is a view corresponding to the direction of arrows III-III in FIG. 2;
4 is a front view of inner ring in an example of an embodiment for carrying out the present invention, and is a view corresponding to arrow IV-IV in FIG. 2;
FIG. 5 is a cross-sectional view showing a furnace wall tube panel of a boiler.
FIG. 6 is a plan view illustrating an example of a conventional water pressure test apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe 2 Fin 3 Furnace wall pipe panel 4 U-shaped pipe 5 Pipe joint 6 Plug member 9 Small diameter part 10 Large diameter part 11 Short pipe 12 Annular groove 13 Seal member 14 Locking member 15 Tapered surface 16 Outer ring main body 17 Outer flange part 18 Outer slit 19 Screw hole 20 Outer ring 21 Tapered surface 22 Inner ring body 23 Inner flange portion 24 Inner slit 25 Through hole 26 Inner ring 27 Lock bolt 28 Unlock bolt 29 Unlock screw hole

Claims

By connecting the ends of each tube of the furnace wall tube panel formed by arranging a plurality of tubes in parallel at a required interval and connecting them with fins, the inside of each tube is communicated in series, A pipe joint for applying a water pressure is fixed to the start end of the pipe communicated in series, and a water pressure is applied to the pipe from the side where the pipe joint is fixed in a state where a plug member for closing is fixed to the end of the pipe. In the water pressure testing device configured to give,
A small-diameter portion having an outer diameter smaller than the inner diameter of the tube by a required amount and an end of the small-diameter portion at the end of the pipe joint, the both ends of the U-shaped tube, and the end of the plug member can be inserted into the tube. A short pipe having a large diameter portion is connected, a water seal member is attached to an annular groove formed in the large diameter portion of the short pipe, and the small diameter portion of the short pipe is connected to the end of the short pipe. A hydraulic pressure test is characterized in that a lock member is provided to support the axial force applied to the short pipe, which is inserted into the gap between the outer peripheral surface of the small-diameter portion of the short pipe and the inner peripheral surface of the end of the pipe at the time of insertion. apparatus.

An outer ring main body inserted between the inner peripheral surface of the end portion of the tube and the short tube and having a tapered surface formed on the inner peripheral surface so that the inner diameter gradually decreases toward the distal end side, and a base end portion of the outer ring main body An outer flange portion that projects to the outer peripheral side and engages with an end surface of the pipe, an outer slit that is formed to extend in an axial direction at a required circumferential direction of the outer ring main body and the outer flange portion, and a circumferential direction in the outer flange portion An outer ring having a screw hole drilled in a required location;
An inner ring body that is inserted between the inner peripheral surface of the outer ring and the outer peripheral surface of the short tube and has a tapered surface that follows the tapered surface of the outer ring on the outer peripheral surface; and a base end portion of the inner ring main body An inner flange portion projecting from the outer periphery to the outer peripheral side, an inner slit formed to extend in the axial direction at a required position in the circumferential direction of the inner ring main body and the inner flange portion, and a screw hole of the outer flange portion in the inner flange portion An inner ring having a through hole drilled in a corresponding circumferential required place;
When the outer pipe and the inner ring are inserted into the gap between the outer peripheral surface of the small-diameter portion of the short pipe and the inner peripheral surface of the end of the short pipe when the short pipe is inserted into the end of the pipe, the through hole of the inner flange is formed. The water pressure test apparatus according to claim 1, wherein a lock member is constituted by a lock bolt that penetrates and is tightened into a screw hole of the outer flange portion.

The water pressure test apparatus according to claim 2, wherein a lock release screw hole into which the lock release bolt is tightened is formed at a required position in the circumferential direction of the inner flange portion.