JPS6321550B2 - - Google Patents
Info
- Publication number
- JPS6321550B2 JPS6321550B2 JP57109867A JP10986782A JPS6321550B2 JP S6321550 B2 JPS6321550 B2 JP S6321550B2 JP 57109867 A JP57109867 A JP 57109867A JP 10986782 A JP10986782 A JP 10986782A JP S6321550 B2 JPS6321550 B2 JP S6321550B2
- Authority
- JP
- Japan
- Prior art keywords
- wall
- pipe
- tube
- ice particles
- ice
- 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
Links
- 239000002245 particle Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000008014 freezing Effects 0.000 description 9
- 238000007710 freezing Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Cleaning In General (AREA)
Description
【発明の詳細な説明】
本発明は管内壁の研掃方法に係り、特に管内に
挿入した氷粒噴射ノズルの移動に合わせて管壁を
暖めていくことにより、管内壁の凍結を防止して
投射氷粒が効果的に作用することができる管内壁
の研掃方法に関する。[Detailed Description of the Invention] The present invention relates to a method for cleaning the inner wall of a pipe, and in particular, it prevents the inner wall of the pipe from freezing by warming the pipe wall in accordance with the movement of an ice jet nozzle inserted into the pipe. The present invention relates to a method for cleaning the inner wall of a pipe on which projected ice particles can effectively act.
最近、サンドブラスト法の砂に代えて氷粒を使
用したアイスブラスト法が、廃棄物を出さないこ
とから脚光を浴びている。ここでアイスブラスト
法とは高速流体により搬送される氷粒（ドライア
イス粒も含む）によつて被研掃体表面の研掃を行
なう方法である。このアイスブラスト法は上述し
た利点があるものの氷粒を使用することから生じ
る特有の欠点もある。そのうちの最も大きなもの
は被研削体の凍結である。氷粒の搬送手段である
高速流体に水を使用すれば凍結の虞れはないが、
水加速では高々100m／sec程度が限界である。そ
こで、より研掃効果を上げるため勢い200〜
300m／secの加速を容易に得ることができる空気
その他の高速気体を使用することとなる。この場
合、被研削体が金属材、特に内部に空気が篭もる
鋼管であるときに凍結が大きくクローズアツプさ
れて来る。すなわち、氷粒の投射によつて管が冷
却され管内の空気中の水分又は融解水が凍結して
管内壁に氷壁を形成するため、この氷壁が保護層
となつて管内壁の研削が効率良く行なわれなくな
ることである。 Recently, ice blasting, which uses ice particles instead of sand in sandblasting, has been attracting attention because it does not produce waste. Here, the ice blast method is a method in which the surface of the object to be polished is polished using ice particles (including dry ice particles) conveyed by a high-speed fluid. Although this ice blasting method has the above-mentioned advantages, it also has its own disadvantages resulting from the use of ice particles. The biggest one is freezing of the object to be ground. There is no risk of freezing if water is used as the high-speed fluid that transports the ice particles, but
Water acceleration has a limit of about 100 m/sec at most. Therefore, in order to improve the cleaning effect, the force of 200~
Air or other high-speed gases that can easily achieve accelerations of 300 m/sec will be used. In this case, when the object to be ground is a metal material, especially a steel pipe in which air is trapped inside, freezing becomes very close-up. In other words, the tube is cooled by the projection of ice particles, and the moisture or melted water in the air inside the tube freezes, forming an ice wall on the inner wall of the tube.This ice wall acts as a protective layer, making grinding of the inner wall of the tube more efficient. It is something that will no longer be practiced.
本発明はかかる問題に鑑み、氷粒の投射と同時
にその投射部に熱を供給することにより、被研掃
体である管を０℃以下にならないように保温して
管内壁の凍結防止を図つて研掃効果の低下を防ぎ
作業能率を可及的に向上させることができる管内
壁の研掃方法を提供することを目的とする。 In view of this problem, the present invention aims to prevent the inner wall of the pipe from freezing by keeping the pipe, which is the object to be polished, warm so as not to drop below 0°C by supplying heat to the projection part at the same time as the ice particles are projected. It is an object of the present invention to provide a method for cleaning the inner wall of a pipe, which can prevent the deterioration of the cleaning effect and improve work efficiency as much as possible.
液体を排出した管内に挿入して管軸方向に移動
する噴射ノズルから高速気体と共に氷粒を管内壁
にほぼ直角に投射して、管内壁に付着したスケー
ルを除去すると共に、移動する噴射ノズルに合せ
て投射部分の管外壁に熱を供給していくようにし
たものである。 An injection nozzle that is inserted into a pipe that has discharged liquid and moves in the direction of the pipe axis projects ice particles along with high-speed gas almost perpendicularly to the inner wall of the pipe to remove scale that has adhered to the inner wall of the pipe, and at the same time At the same time, heat is supplied to the outer wall of the tube in the projection area.
以下、本発明に係る研掃方法の好適一実施例を
添付図面に従つて説明する。 A preferred embodiment of the cleaning method according to the present invention will be described below with reference to the accompanying drawings.
第１図は本発明方法を利用した管内壁研掃装置
の一例を示す概略断面図である。 FIG. 1 is a schematic sectional view showing an example of a pipe inner wall cleaning device using the method of the present invention.
図示する如く、管１内に挿入する噴射ノズル２
には、その先端に空気等の高速気体３と共に噴出
する氷粒４が管内周壁１ａにほぼ直角で均一に投
射されるように案内受板５が装着されている。ま
た、氷粒が投射される管部の外側に管外周壁１ｂ
を囲繞する如く環状管６が嵌装され、この環状管
６にはこれに通水された水を管外周壁１ｂに散水
するように多数の孔が穿設されている。そして、
環状管６は管１内に挿入した噴射ノズル２の移動
に合わせて同方向に従動するように、例えば第２
図に示す如く、噴射ノズル２に一端を固定され管
１の両端側に対設するローラ７，８間に張設した
ロープ９の他端に連結されている。 As shown in the figure, an injection nozzle 2 inserted into a pipe 1
A guide receiving plate 5 is attached to the tip of the tube so that the ice particles 4 ejected together with a high-speed gas 3 such as air are uniformly projected at a substantially right angle to the inner circumferential wall 1a of the tube. In addition, a tube outer peripheral wall 1b is provided on the outside of the tube portion onto which ice particles are projected.
An annular pipe 6 is fitted so as to surround the annular pipe 6, and a large number of holes are bored in the annular pipe 6 so that water passed through the annular pipe 6 can be sprinkled onto the outer circumferential wall 1b of the pipe. and,
The annular pipe 6 is configured to move in the same direction according to the movement of the injection nozzle 2 inserted into the pipe 1.
As shown in the figure, one end of the rope 9 is fixed to the injection nozzle 2 and is connected to the other end of a rope 9 stretched between rollers 7 and 8 provided at opposite ends of the tube 1.
以上の構成よりなる装置の作用を述べると、水
を排出した管１内に挿入された噴射ノズル２は矢
印方向に移動しながら高速気体とともに氷粒４を
管内周壁１ａにほぼ直角に投射しこれに付着した
スケールを除去していく。氷粒４の投射により投
射部位の管部分は急速に冷却されるも、投射と同
時に環状管６から管外周壁１ｂに向けて散水が行
なわれ管内周壁１ａの温度が０℃以下とならない
ように熱を供給しているので、この熱が直接或い
は間接的に管１内の空気中の水分或いは融解水が
凍結するのを阻止する。直接的にというのは、散
水する水の温度が比較的高く管外周壁１ｂで凍結
しない場合であり、また間接的にというのは管外
周壁１ｂに散水された水が凍結する程の水温であ
つて、この凍結する際発生する凝固熱が作用する
場合である。 To describe the operation of the device having the above configuration, the injection nozzle 2 inserted into the pipe 1 from which water has been discharged moves in the direction of the arrow and projects ice particles 4 together with high-speed gas almost perpendicularly to the inner peripheral wall 1a of the pipe. Remove scale that has adhered to the surface. Although the tube section at the projection site is rapidly cooled by the projection of the ice particles 4, at the same time as the projection, water is sprinkled from the annular tube 6 toward the tube outer circumferential wall 1b to prevent the temperature of the tube inner circumferential wall 1a from falling below 0°C. Since heat is supplied, this heat directly or indirectly prevents moisture in the air or melt water in the tube 1 from freezing. Directly means that the temperature of the water being sprinkled is relatively high and does not freeze on the outer circumferential wall 1b of the pipe, and indirectly means that the temperature of the water sprinkled on the outer circumferential wall 1b of the pipe is such that it freezes. In some cases, the heat of coagulation generated during freezing acts.
従つて、氷粒投射にも拘わらずそれが存在する
と研掃に重大な支障を来たす管内周壁１ａを覆う
氷壁が発生しないので氷粒は直接管内周壁１ａに
直角に衝突することとなり、その衝撃力又は摩擦
力により付着したスケールを効率良く除去するこ
とができる。また噴射ノズル２の移動に伴ない環
状管６も同方向に移動するので、氷粒４を管１全
長に亘つて常に直接管内周壁１ａに投射すること
ができ、また該当部位の散水のみで足りることか
ら全長に散水する方法に比して水使用量を飛躍的
に低減できる。 Therefore, despite the projection of ice particles, no ice wall is generated covering the inner wall 1a of the tube, which would seriously impede the cleaning process, and the ice particles directly collide with the inner wall 1a at right angles, reducing the impact force. Alternatively, attached scale can be efficiently removed by frictional force. Furthermore, as the injection nozzle 2 moves, the annular pipe 6 also moves in the same direction, so that the ice particles 4 can always be directly projected onto the inner circumferential wall 1a of the pipe over the entire length of the pipe 1, and it is sufficient to only sprinkle water on the corresponding area. Therefore, the amount of water used can be dramatically reduced compared to the method of watering the entire length.
尚、上記実施例では熱の供給方法として環状管
６から散水するようにしたが、必ずしもこれに限
定されるものではなく、例えば環状管６に代えて
これを温度制御下におかれたヒータとすることも
勿論可能であり、要するに熱を供給するものであ
ればいずれでもよい。 In the above embodiment, water is supplied from the annular tube 6 as a heat supply method, but the method is not limited to this. For example, the annular tube 6 may be replaced with a heater under temperature control. Of course, it is also possible to do so, and in short, any material that supplies heat may be used.
以上、要するに本発明によれば次のような優れ
た効果を発揮する。 In summary, the present invention exhibits the following excellent effects.
(1) 氷粒の搬送手段に液体を使うのではなく、液
体よりも更に加速が容易な気体を使うので、氷
粒に大きなエネルギを与えることができ、しか
も高速気体によつて大きなエネルギーを与えた
氷粒を、管内壁と平行ではなく、管内壁にほぼ
直角に投射するようにしたので、はるかに高い
衝撃力又は摩擦力を管内壁に付着したスケール
に与えることができる。(1) Instead of using liquid as a means of transporting ice particles, we use gas, which is easier to accelerate than liquid, so we can give large amounts of energy to ice particles, and also give large amounts of energy by using high-speed gas. Since the ice particles are projected almost perpendicularly to the inner wall of the tube rather than parallel to the inner wall of the tube, a much higher impact force or frictional force can be applied to the scale attached to the inner wall of the tube.
一方、高速気体を氷粒の搬送手段として使用
するゆえに生じる管内壁の凍結については、氷
粒投射部分の管外壁に熱が供給されるので、単
に氷粒投射のみを行なう従来のものに比して、
凍結がなくなり管内壁の研掃の支障となる氷壁
層が発生するのを防止できる。したがつて、研
掃効率が低下せずスケールを確実に除去できる
ので、特に放射性物質が付着する原子力配管に
適用すればきわめて有効となる。 On the other hand, regarding the freezing of the inner wall of the tube that occurs due to the use of high-velocity gas as a means of transporting ice particles, heat is supplied to the outer wall of the tube at the part where ice particles are projected, so compared to the conventional method that only projects ice particles. hand,
Freezing is eliminated, and it is possible to prevent the formation of an ice wall layer that would impede cleaning of the inner wall of the pipe. Therefore, the scale can be reliably removed without reducing the cleaning efficiency, making it extremely effective especially when applied to nuclear power piping where radioactive materials adhere.
(2) 噴射ノズルの移動に合わせて熱の供給箇所も
移動させるようにしたので、管全長に熱供給す
る方法と異なり、必要な箇所のみに要される少
ないエネルギーで足り省エネルギー化を図るこ
とができ、また熱の供給手段に噴射ノズルの移
動とともに自動的に従動する装置を使用すれば
作業能率が向上し短時間に大量の管研掃を行な
うことができる。(2) As the injection nozzle moves, the heat supply point also moves, so unlike the method of supplying heat to the entire length of the pipe, less energy is required only to the necessary points, resulting in energy savings. In addition, if a device that automatically follows the movement of the injection nozzle is used as the heat supply means, the work efficiency will be improved and a large amount of pipe can be cleaned in a short period of time.
第１図は本発明に係る管内壁の研掃方法を利用
した装置の好適一実施例を示す概略要部断面図、
第２図は同じく概略全体図である。
尚、図中１は管、１ａは管内周壁、１ｂは管外
周壁、２は噴射ノズル、３は高速気体、４は氷
粒、６は熱供給手段たる環状管である。
FIG. 1 is a schematic cross-sectional view of essential parts showing a preferred embodiment of an apparatus using the method for cleaning the inner wall of a pipe according to the present invention;
FIG. 2 is also a schematic overall view. In the figure, 1 is a tube, 1a is an inner circumferential wall of the tube, 1b is an outer circumferential wall of the tube, 2 is an injection nozzle, 3 is a high-speed gas, 4 is an ice particle, and 6 is an annular tube serving as a heat supply means.
Claims (1)
動する噴射ノズルから高速気体と共に氷粒を管内
壁にほぼ直角に投射して、管内壁に付着したスケ
ールを除去すると共に、移動する噴射ノズルに合
せて投射部分の管外壁に熱を供給していくように
したことを特徴とする管内壁の研掃方法。1 A spray nozzle that is inserted into a pipe that has discharged liquid and moves in the axial direction of the pipe projects ice particles along with high-speed gas almost perpendicularly to the pipe inner wall to remove scale attached to the pipe inner wall, and the moving spray nozzle A method for cleaning an inner wall of a tube, characterized in that heat is supplied to the outer wall of the tube at the projection portion in accordance with the amount of heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57109867A JPS594482A (en) | 1982-06-28 | 1982-06-28 | Method of polishing and cleaning inner wall of pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57109867A JPS594482A (en) | 1982-06-28 | 1982-06-28 | Method of polishing and cleaning inner wall of pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS594482A JPS594482A (en) | 1984-01-11 |
| JPS6321550B2 true JPS6321550B2 (en) | 1988-05-07 |
Family
ID=14521204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57109867A Granted JPS594482A (en) | 1982-06-28 | 1982-06-28 | Method of polishing and cleaning inner wall of pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS594482A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015006696A (en) * | 2004-08-02 | 2015-01-15 | エイティーアイ・プロパティーズ・インコーポレーテッド | Method for replacing corroded fluid conducting parts in equipment by welding and parts obtained thereby |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62241589A (en) * | 1986-04-10 | 1987-10-22 | 望月 たく夫 | Method of washing inside of duct |
| JP2618291B2 (en) * | 1991-02-13 | 1997-06-11 | 作治 藏田 | How to clean pipes |
| JP5632667B2 (en) * | 2010-07-12 | 2014-11-26 | 株式会社不二製作所 | Gun barrel cleaning method and gun barrel cleaning device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5284850A (en) * | 1976-01-07 | 1977-07-14 | Hitachi Ltd | Luid passage washing method |
-
1982
- 1982-06-28 JP JP57109867A patent/JPS594482A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5284850A (en) * | 1976-01-07 | 1977-07-14 | Hitachi Ltd | Luid passage washing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015006696A (en) * | 2004-08-02 | 2015-01-15 | エイティーアイ・プロパティーズ・インコーポレーテッド | Method for replacing corroded fluid conducting parts in equipment by welding and parts obtained thereby |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS594482A (en) | 1984-01-11 |
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