JP2548826Y2 - Spray cleaning device - Google Patents
Spray cleaning deviceInfo
- Publication number
- JP2548826Y2 JP2548826Y2 JP1991009044U JP904491U JP2548826Y2 JP 2548826 Y2 JP2548826 Y2 JP 2548826Y2 JP 1991009044 U JP1991009044 U JP 1991009044U JP 904491 U JP904491 U JP 904491U JP 2548826 Y2 JP2548826 Y2 JP 2548826Y2
- Authority
- JP
- Japan
- Prior art keywords
- cleaning
- water
- nozzle
- jet
- pipe
- 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.)
- Expired - Fee Related
Links
Landscapes
- Incineration Of Waste (AREA)
Description
【0001】[0001]
【産業上の利用分野】本考案は,原子力発電プラント用
蒸気発生器の2次側の管外面,管と管板との境界部,管
板面等に付着したスケールを洗浄する噴射洗浄装置に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray cleaning device for cleaning scale attached to a secondary tube outer surface, a boundary between tubes and a tube sheet, a tube sheet surface, etc. of a steam generator for a nuclear power plant. Things.
【0002】[0002]
【従来の技術】原子力発電プラント用蒸気発生器の2次
側の管外面,管と管板との境界部,管板面等に付着した
スケールを洗浄する噴射洗浄装置の従来例を図5乃至図
8により説明すると,1が洗浄ノズル,図8の1aが同
洗浄ノズル1の先端部に穿設したストレート状のノズル
孔,1bが同洗浄ノズル1内に設けた水通路孔,図5,
図6の2が同洗浄ノズル1を先端部に設けた2本の洗浄
ホース,3がガイドパイプで,上記各洗浄ホース2が同
ガイドパイプ3内に挿入,設置されている。また4が同
ガイドパイプ3を支持する支持機構,5が排水装置の排
水管で,同排水管5の管板側端部が下方に折り曲げられ
ている。また7が竪型熱交換器(蒸気発生器)の管板,
8が竪型熱交換器胴,9が同竪型熱交換器胴の手穴,1
0が管である。2. Description of the Related Art FIGS. 5 to 5 show a conventional example of an injection cleaning apparatus for cleaning scale attached to the outer surface of a pipe on the secondary side of a steam generator for a nuclear power plant, a boundary portion between pipes and a pipe sheet, a pipe sheet surface, and the like. 8, 1 is a cleaning nozzle, 1a in FIG. 8 is a straight nozzle hole drilled at the tip of the cleaning nozzle 1, 1b is a water passage hole provided in the cleaning nozzle 1, FIG.
In FIG. 6, reference numeral 2 denotes two cleaning hoses provided with the cleaning nozzle 1 at the tip, and reference numeral 3 denotes a guide pipe. Each of the cleaning hoses 2 is inserted and installed in the guide pipe 3. Reference numeral 4 denotes a support mechanism for supporting the guide pipe 3, and reference numeral 5 denotes a drainage pipe of a drainage device. The end of the drainage pipe 5 on the tube plate side is bent downward. 7 is a tube plate of a vertical heat exchanger (steam generator),
8 is a vertical heat exchanger body, 9 is a hand hole of the vertical heat exchanger body, 1
0 is a tube.
【0003】上記図5乃至図8に示す噴射洗浄装置で
は,ガイドパイプ3を手穴9から竪型熱交換器の管板7
上に挿入して,同ガイドパイプ3を支持機構4により竪
型熱交換器胴の手穴9に挿入,引出し可能に取付け,次
いで高圧の洗浄水を各洗浄ホース2→各洗浄ノズル1の
水通路孔1b→ストレート状のノズル孔1aから管板7
上へ平行流ジエツトとして噴射するとともに,ガイドパ
イプ3を挿入したり,引出したりして,管10外面,管
10と管板7との境界部,管板7面等に付着したスケー
ルを洗浄し,洗浄後の洗浄水を排水装置の排水管5から
竪型熱交換器胴外へ排出するようにしている。In the spray cleaning apparatus shown in FIGS. 5 to 8, the guide pipe 3 is inserted through a hand hole 9 into a tube plate 7 of a vertical heat exchanger.
The guide pipe 3 is inserted into the hand hole 9 of the vertical heat exchanger body by the support mechanism 4 and attached so as to be able to be pulled out. Then, high-pressure washing water is supplied to each washing hose 2 → the washing nozzle 1 Passage hole 1b → tube sheet 7 from straight nozzle hole 1a
The jet is injected upward as a parallel flow jet, and the scale attached to the outer surface of the tube 10, the boundary between the tube 10 and the tube plate 7, the surface of the tube plate 7 and the like is washed by inserting and withdrawing the guide pipe 3. The washing water after the washing is discharged from the drain pipe 5 of the drain device to the outside of the vertical heat exchanger body.
【0004】このとき,排水装置の排水管5を竪型熱交
換器の管板7上にセツトし,同管板7周りの洗浄雰囲気
を大気圧にして,平行流ジエツトの推力を減じさせない
ようにしている。At this time, the drain pipe 5 of the drain device is set on the tube plate 7 of the vertical heat exchanger, and the washing atmosphere around the tube plate 7 is set to the atmospheric pressure so that the thrust of the parallel flow jet is not reduced. I have to.
【0005】[0005]
【考案が解決しようとする課題】前記図5乃至図8に示
す従来の噴射洗浄装置では,高圧の洗浄水を各洗浄ホー
ス2→各洗浄ノズル1の水通路孔1b→ストレート状の
ノズル孔1aから大気中の管板7上へ平行流ジエツトと
して噴射して,管10外面,管10と管板7との境界
部,管板7面等に付着したスケールを洗浄しており,軟
質スケールは除去できるが,硬質スケールは除去できな
くて,残留させるという問題があった。In the conventional spray cleaning apparatus shown in FIGS. 5 to 8, the high-pressure cleaning water is supplied to each cleaning hose 2 → the water passage hole 1b of each cleaning nozzle 1 → the straight nozzle hole 1a. Is sprayed onto the tube sheet 7 in the atmosphere as a parallel flow jet to clean the scale attached to the outer surface of the tube 10, the boundary between the tube 10 and the tube sheet 7, the surface of the tube sheet 7, etc. There was a problem that the hard scale could not be removed but remained, although it could be removed.
【0006】本考案は前記の問題点に鑑み提案するもの
であり, その目的とする処は,管外面,管と管板との境
界部,管板面等に付着した軟質スケールは勿論のこと,
硬質スケールも迅速に除去できて,洗浄作業の高能率
化,工程短縮,被曝低減を併せ達成できる噴射洗浄装置
を提供しようとるする点にある。The present invention is proposed in view of the above-mentioned problems, and its purpose is not limited to the soft scale attached to the outer surface of the tube, the boundary between the tube and the tube sheet, the surface of the tube sheet, and the like. ,
It is an object of the present invention to provide a jet cleaning apparatus capable of quickly removing hard scales and achieving high efficiency of cleaning work, shortening of processes, and reduction of exposure.
【0007】[0007]
【課題を解決するための手段】上記の目的を達成するた
めに,本考案は,先端部に洗浄ノズルを設けた洗浄ホー
スをガイドパイプ内に挿入,設置した噴射洗浄装置にお
いて,前記洗浄ノズルのノズル孔を水通路孔の端部にこ
の水通路孔に対して接線方向に設けるとともに,同ノズ
ル孔を平行スロート部とそれに続く先開きテーパ部とに
より構成している。In order to achieve the above object, the present invention provides a jet cleaning apparatus in which a cleaning hose provided with a cleaning nozzle at a tip is inserted into a guide pipe and installed therein. The nozzle hole is provided at the end of the water passage hole in a tangential direction to the water passage hole, and the nozzle hole is constituted by a parallel throat portion and a subsequent tapered opening portion.
【0008】[0008]
【作用】ガイドパイプを熱交換器の管板上に挿入して,
同ガイドパイプを支持機構により挿入,引出し可能に支
持し,次いで高圧の洗浄水を洗浄ホース→各洗浄ノズル
の水通路孔→この水通路孔に対して接線方向に設けたノ
ズル孔の平行スロート部→この平行スロート部に続くノ
ズル孔の先開きテーパ部→管板上へ拡散水流ジエツトと
して噴射するとともに,ガイドパイプを挿入したり,引
出したりして,管外面等に付着したスケールを洗浄す
る。この洗浄は,水中でも実施可能である。この場合に
は,給水装置の給水管から管板上へ給水する一方,排水
装置の排水管から排水して,管板上に水を適当な水深で
漲り,洗浄ノズルを水没させ,先開きテーパ部からの拡
散水流ジエツトを乱れ度大な乱れジエツトとして噴射す
る。この気中及び水中の乱れジエツトは,ノズルを出た
直後から噴射水の噴射方向に高周波の速度変動成分があ
るので,これが被洗浄面に振動圧力として作用して,至
近距離でも高い掘削除去性能が得られる。特に乱れジエ
ツト(水中)の場合には,上記作用の外に,周囲の水を
強く加速する伴流作用があり,これらの作用により至近
距離での掘削除去性能が一層向上する。従って管外面,
管と管板との境界部,管板面等に付着した軟質スケール
は勿論のこと,硬質スケールも迅速に除去されて,洗浄
作業の高能率化,工程短縮,被曝低減が併せ達成され
る。[Action] Insert the guide pipe into the tube plate of the heat exchanger,
The guide pipe is supported by a support mechanism so that it can be inserted and withdrawn, and then high-pressure washing water is used for washing hoses → water passage holes for each washing nozzle → parallel throat portions of nozzle holes provided tangentially to these water passage holes → The tapered portion of the nozzle hole following the parallel throat portion → The jet is sprayed onto the tube sheet as a diffusion water jet, and the scale attached to the outer surface of the tube is washed by inserting or pulling out a guide pipe. This cleaning can be performed in water. In this case, the water is supplied from the water supply pipe of the water supply device onto the tube sheet, while the water is drained from the drain pipe of the drainage device, the water is poured on the tube sheet at an appropriate depth, the washing nozzle is submerged, and the first opening taper is formed. The jet of the diffused water flow from the section is jetted as a turbulent jet with a large degree of turbulence. The turbulent jet in the air and water has a high-frequency velocity fluctuation component in the jetting direction of the jet water immediately after leaving the nozzle, and this acts as an oscillating pressure on the surface to be cleaned. Is obtained. In particular, in the case of a turbulent jet (underwater), besides the above-described action, there is a wake action that strongly accelerates surrounding water, and these actions further improve excavation removal performance at a close distance. Therefore, the outer surface of the pipe,
The hard scale as well as the soft scale adhering to the boundary between the tube and the tube sheet, the surface of the tube sheet, and the like are quickly removed, so that the efficiency of the cleaning operation, the shortening of the process, and the reduction of the exposure are achieved at the same time.
【0009】[0009]
【実施例】次に本考案の噴射洗浄装置を図1乃至図3に
示す一実施例により説明すると,1が洗浄ノズル,1a
が同洗浄ノズル1の先端部に穿設したノズル孔,1bが
同洗浄ノズル1内に設けた水通路孔で,ノズル孔1a
は,水通路孔1bの端部から水通路孔1bに対して接線
方向に設けた平行スロート部1a1 と,それに続く角度
θの先開きテーパ部1a2 とにより構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a jet cleaning apparatus according to the present invention will be described with reference to an embodiment shown in FIGS.
Is a nozzle hole drilled at the tip of the washing nozzle 1, 1b is a water passage hole provided in the washing nozzle 1, and the nozzle hole 1a
From the end of the water passage hole 1b parallel throat portion 1a 1 provided tangentially to the water passage hole 1b, it is formed by opening the previous subsequent angle θ between the tapered portion 1a 2.
【0010】2が上記洗浄ノズル1を先端部に設けた2
本の洗浄ホース,3がガイドパイプで,上記各洗浄ホー
ス2が同ガイドパイプ3内に挿入,設置されている。4
が同ガイドパイプ3を支持する支持機構,5が排水装置
の排水管,6が給水装置の給水管で,これら排水管5及
び給水管6の管板側端部が下方に折り曲げられている。Reference numeral 2 denotes a cleaning nozzle provided with the washing nozzle 1 at the tip.
The cleaning hoses 3 are guide pipes, and the cleaning hoses 2 are inserted and installed in the guide pipes 3. 4
Is a supporting mechanism for supporting the guide pipe 3, 5 is a drainage pipe of a drainage device, 6 is a water supply pipe of a water supply device, and the ends of the drainage pipes 5 and 6 are bent downward.
【0011】7が竪型熱交換器(蒸気発生器)の管板,
8が竪型熱交換器胴,9が同竪型熱交換器胴の手穴,1
0が管である。次に前記図1乃至図3に示す噴射洗浄装
置の作用を具体的に説明する。ガイドパイプ3を手穴9
から竪型熱交換器の管板7上に挿入して,同ガイドパイ
プ3を支持機構4により竪型熱交換器胴の手穴9に挿
入,引出し可能に取付け,次いで高圧の洗浄水を各洗浄
ホース2→各洗浄ノズル1の水通路孔1b→この水通路
孔1bに対して接線方向に設けたノズル孔1aの平行ス
ロート部1a1 →この平行スロート部1a1 に続くノズ
ル孔1aの先開きテーパ部1a2 から管板7上へ角度θ
(θ=8°〜30°程度)(図3参照)の拡散水流ジエ
ツトとして噴射するとともに,ガイドパイプ3を挿入し
たり,引出したりして,管10外面,管10と管板7と
の境界部,管板7面等に付着したスケールを洗浄する。7 is a tube plate of a vertical heat exchanger (steam generator),
8 is a vertical heat exchanger body, 9 is a hand hole of the vertical heat exchanger body, 1
0 is a tube. Next, the operation of the spray cleaning device shown in FIGS. 1 to 3 will be specifically described. Guide hole 3 with hand hole 9
From above into the tube plate 7 of the vertical heat exchanger, the guide pipe 3 is inserted into the hand hole 9 of the vertical heat exchanger body by the support mechanism 4 and attached so as to be able to be drawn out. Cleaning hose 2 → Water passage hole 1b of each washing nozzle 1 → Parallel throat portion 1a 1 of nozzle hole 1a provided tangentially to this water passage hole 1b → Point of nozzle hole 1a following this parallel throat portion 1a 1 Angle θ from open tapered portion 1a 2 onto tube sheet 7
(Θ = approximately 8 ° to 30 °) (see FIG. 3) while jetting as a diffusion water jet and inserting or pulling out the guide pipe 3 to make the outer surface of the pipe 10 or the boundary between the pipe 10 and the pipe sheet 7 And the scale adhered to the tube plate 7 surface and the like.
【0012】この洗浄は,水中でも実施可能である。こ
の場合には,給水装置の給水管6から管板7上へ給水す
る一方,排水装置の排水管5から排水して,管板7上に
水を水深h(100mm程度の水深)に漲り,各洗浄ノ
ズル1を水没させて,先開きテーパ部1a2 からの拡散
水流ジエツトを乱れ度大な乱れジエツトとして,噴射す
る。This cleaning can be performed in water. In this case, while water is supplied from the water supply pipe 6 of the water supply apparatus onto the tube sheet 7, the water is drained from the drain pipe 5 of the drainage apparatus, and the water is poured onto the tube sheet 7 to a water depth h (water depth of about 100 mm). by submerging the respective cleaning nozzles 1, as previously open diffusion flow Jietsuto disturbance large degree disturbance Jietsuto from the tapered portion 1a 2, ejects.
【0013】図4中のAは,前記従来の平行流型ノズル
で得られる平行流ジエツト(気中)を示し,Bは,本考
案の乱れジエツト型ノズルで得られる乱れジエツト(気
中)を示し,Cは,本考案の乱れジエツト型ノズルで得
られる乱れジエツト(水中)を示している。従来の平行
流型ノズルで得られる平行流ジエツト(気中)Aは,洗
浄ノズルの先端部からかなり離れた位置で掘削除去性能
のピーク値を示し,管群部洗浄のように至近距離での洗
浄では低い掘削除去性能しか得られない。FIG. 4A shows a parallel flow jet (air) obtained by the conventional parallel flow nozzle, and FIG. 4B shows a turbulence jet (air) obtained by the turbulent jet nozzle of the present invention. 3C shows a turbulent jet (underwater) obtained by the turbulent jet type nozzle of the present invention. The parallel flow jet (aerial) A obtained with the conventional parallel flow type nozzle shows the peak value of the excavation and removal performance at a position far away from the tip of the cleaning nozzle. Cleaning provides only low excavation removal performance.
【0014】これに対して本考案の乱れジエツト型ノズ
ルで得られる乱れジエツト(気中)B,及び乱れジエツ
ト(水中)Cは,ノズルを出た直後から噴射水の噴射方
向に高周波の速度変動成分があるので,これが被洗浄面
に振動圧力として作用して,至近距離でも高い掘削除去
性能が得られる。特に乱れジエツト(水中)Cの場合に
は,上記作用の外に,周囲の水を強く加速する伴流作用
があり,これらの作用により至近距離での掘削除去性能
が一層向上する。On the other hand, the turbulent jet (in the air) B and the turbulent jet (in the water) C obtained by the turbulent jet type nozzle of the present invention have a high-frequency speed fluctuation in the jetting direction of the jet water immediately after leaving the nozzle. Since there is a component, this acts as a vibration pressure on the surface to be cleaned, and high excavation removal performance can be obtained even at a short distance. In particular, in the case of the turbulent jet (underwater) C, in addition to the above-described action, there is a wake action that strongly accelerates surrounding water, and these actions further improve the excavation removal performance at a close distance.
【0015】[0015]
【表1】 [Table 1]
【0016】表1は,同一の噴射圧力,至近噴射距離,
噴射時間で,水を鉛板に向かい噴射したときの潰食量の
測定結果を示している。この表1から明らかなように潰
食量は,乱れジエツト(水中)Cの場合が最も大きい。
なお平行流ジエツトを水中に噴射した場合には,気中に
噴射した場合よりも減衰することを合わせ確認してい
る。Table 1 shows the same injection pressure, the closest injection distance,
The measurement results of the erosion amount when water is sprayed toward the lead plate at the spray time are shown. As is apparent from Table 1, the erosion amount is the largest in the case of turbulent jet (underwater) C.
In addition, it has been confirmed that when a parallel flow jet is injected into water, it is attenuated more than when it is injected into the air.
【0017】[0017]
【考案の効果】本考案の噴射洗浄装置は前記のようにガ
イドパイプを熱交換器の管板上に挿入して,同ガイドパ
イプを支持機構により挿入,引出し可能に支持し,次い
で高圧の洗浄水を洗浄ホース→各洗浄ノズルの水通路孔
→この水通路孔に対して接線方向に設けたノズル孔の平
行スロート部→この平行スロート部に続くノズル孔の先
開きテーパ部→管板上へ拡散水流ジエツトとして噴射す
るとともに,ガイドパイプを挿入したり,引出したりし
て,管外面等に付着したスケールを洗浄する。この洗浄
は,水中でも実施可能である。この場合には,給水装置
の給水管から管板上へ給水する一方,排水装置の排水管
から排水して,管板上に水を適当な水深で漲り,洗浄ノ
ズルを水没させ,先開きテーパ部からの拡散水流ジエツ
トを乱れ度大な乱れジエツトとして噴射する。この気中
及び水中の乱れジエツトは,ノズルを出た直後から噴射
水の噴射方向に高周波の速度変動成分があるので,これ
が被洗浄面に振動圧力として作用して,至近距離でも高
い掘削除去性能が得られる。特に乱れジエツト(水中)
の場合には,上記作用の外に,周囲の水を強く加速する
伴流作用があり,これらの作用により至近距離での掘削
除去性能が一層向上する。従って管外面,管と管板との
境界部,管板面等に付着した軟質スケールは勿論のこ
と,硬質スケールも迅速に除去できて,洗浄作業の高能
率化,工程短縮,被曝低減を併せ達成できる。[Effect of the Invention] The spray cleaning apparatus of the present invention inserts a guide pipe into the tube plate of the heat exchanger as described above, supports the guide pipe so that it can be inserted and pulled out by a support mechanism, and then performs high-pressure cleaning. Water washing hose → Water passage hole of each washing nozzle → Parallel throat part of nozzle hole provided tangentially to this water passage hole → Tapered end of nozzle hole following this parallel throat part → To tube sheet Inject as a diffusion water jet and insert or pull out a guide pipe to clean the scale attached to the outer surface of the pipe. This cleaning can be performed in water. In this case, the water is supplied from the water supply pipe of the water supply device onto the tube sheet, while the water is drained from the drain pipe of the drainage device, the water is poured on the tube sheet at an appropriate depth, the washing nozzle is submerged, and the first opening taper is formed. The jet of the diffused water flow from the section is jetted as a turbulent jet with a large degree of turbulence. The turbulent jet in the air and water has a high-frequency velocity fluctuation component in the jetting direction of the jet water immediately after leaving the nozzle, and this acts as an oscillating pressure on the surface to be cleaned. Is obtained. Especially turbulent jet (underwater)
In the case of, in addition to the above-mentioned action, there is a wake action that strongly accelerates the surrounding water, and these actions further improve the excavation removal performance at a close distance. Therefore, it is possible to quickly remove not only the soft scale attached to the outer surface of the pipe, the boundary between the pipe and the pipe sheet, the surface of the pipe sheet, but also the hard scale, thereby improving the efficiency of the cleaning work, shortening the process, and reducing the exposure. Can be achieved.
【図1】本考案に係わる噴射洗浄装置の一実施例を示す
縦断側面図である。FIG. 1 is a vertical sectional side view showing an embodiment of a jet cleaning apparatus according to the present invention.
【図2】同噴射洗浄装置の洗浄ノズルの拡大側面図であ
る。FIG. 2 is an enlarged side view of a cleaning nozzle of the spray cleaning device.
【図3】図2の矢視XーX線に沿う縦断正面図である。FIG. 3 is a vertical sectional front view taken along line XX of FIG. 2;
【図4】本考案の噴射洗浄装置と従来の噴射洗浄装置と
の洗浄性能を比較した説明図である。FIG. 4 is an explanatory diagram comparing the cleaning performance of the jet cleaning device of the present invention and a conventional jet cleaning device.
【図5】従来の噴射洗浄装置を示す縦断側面図である。FIG. 5 is a vertical sectional side view showing a conventional spray cleaning device.
【図6】その平面図である。FIG. 6 is a plan view thereof.
【図7】図6の矢視YーY線に沿う縦断正面図である。7 is a vertical sectional front view taken along the line YY in FIG. 6;
【図8】同噴射洗浄装置の洗浄ノズルの拡大側面図であ
る。FIG. 8 is an enlarged side view of a cleaning nozzle of the spray cleaning device.
1 洗浄ノズル 1a ノズル孔 1a1 平行スロート部 1a2 先開きテーパ部 1b 水通路孔 3 ガイドパイプDESCRIPTION OF SYMBOLS 1 Washing nozzle 1a Nozzle hole 1a 1 Parallel throat part 1a 2 First opening taper part 1b Water passage hole 3 Guide pipe
Claims (1)
をガイドパイプ内に挿入,設置した噴射洗浄装置におい
て,前記洗浄ノズルのノズル孔を水通路孔の端部にこの
水通路孔に対して接線方向に設けるとともに,同ノズル
孔を平行スロート部とそれに続く先開きテーパ部とによ
り構成したことを特徴とする噴射洗浄装置。1. A jet cleaning device in which a cleaning hose having a cleaning nozzle provided at a tip end is inserted into a guide pipe and installed, wherein a nozzle hole of the cleaning nozzle is provided at an end of the water passage hole with respect to the water passage hole. A spray cleaning device provided in a tangential direction, wherein the nozzle hole is constituted by a parallel throat portion and a tapered portion that opens first.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991009044U JP2548826Y2 (en) | 1991-02-26 | 1991-02-26 | Spray cleaning device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991009044U JP2548826Y2 (en) | 1991-02-26 | 1991-02-26 | Spray cleaning device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04108135U JPH04108135U (en) | 1992-09-18 |
JP2548826Y2 true JP2548826Y2 (en) | 1997-09-24 |
Family
ID=31899769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1991009044U Expired - Fee Related JP2548826Y2 (en) | 1991-02-26 | 1991-02-26 | Spray cleaning device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2548826Y2 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57165992U (en) * | 1981-04-15 | 1982-10-19 | ||
JPH0221437U (en) * | 1988-07-28 | 1990-02-13 |
-
1991
- 1991-02-26 JP JP1991009044U patent/JP2548826Y2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04108135U (en) | 1992-09-18 |
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