JP2003245620A - Pipe inner surface treatment method and jet nozzle - Google Patents
Pipe inner surface treatment method and jet nozzleInfo
- Publication number
- JP2003245620A JP2003245620A JP2002084196A JP2002084196A JP2003245620A JP 2003245620 A JP2003245620 A JP 2003245620A JP 2002084196 A JP2002084196 A JP 2002084196A JP 2002084196 A JP2002084196 A JP 2002084196A JP 2003245620 A JP2003245620 A JP 2003245620A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- nozzle
- injection
- cylindrical body
- angle
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004381 surface treatment Methods 0.000 title claims abstract description 11
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 56
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims abstract description 29
- 235000017557 sodium bicarbonate Nutrition 0.000 claims abstract description 29
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 55
- 239000007924 injection Substances 0.000 claims description 55
- 125000006850 spacer group Chemical group 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000003672 processing method Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- 239000011575 calcium Substances 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 24
- 229910052742 iron Inorganic materials 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 238000011282 treatment Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010065042 Immune reconstitution inflammatory syndrome Diseases 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Cleaning In General (AREA)
- Nozzles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、被処理管（以下、
管という）の内面の付着物除去に関するものであり、更
に詳しくは、例えば、発電所、石油石化プラント等の各
種プラント、機械設備等に使用される配管及びチューブ
の内面に生じる錆或いは内面に付着する水あか、カルシ
ウム分、油分等の付着物（以下、単にスケールという）
を除去するための管内面処理方法及びこれに用いる噴射
用ノズル（以下、ノズルという）に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention
Tubing) for removing deposits on the inner surface, and more specifically, for example, rust generated on the inner surface of pipes and tubes used in various plants such as power plants, petroleum petrochemical plants, mechanical equipment, etc., or adhered to the inner surface. Adhering substances such as water stains, calcium and oil (hereinafter simply referred to as scale)
The present invention relates to a method for treating the inner surface of a pipe for removing the gas and an injection nozzle (hereinafter referred to as a nozzle) used therefor.
【０００２】[0002]
【従来の技術】従来より、圧縮空気又は液体等を用いて
管内面に付着するスケールを除去する方法については、
「ピグ方式」及び「ノズル方式」が提唱されている。2. Description of the Related Art Conventionally, as for the method of removing the scale adhering to the inner surface of the pipe by using compressed air or liquid,
"Pig method" and "nozzle method" have been proposed.
【０００３】ピグ方式では、配管等端部より入れたピグ
と呼ばれる切削刃の付いた冶具を圧縮空気又は液体にて
押し込むと共にこれに回転力を与え、この回転に伴って
切削刃によりスケールを削ることでこれを除去しようと
する方式である。これに類するものとしては、いわゆる
ブラシ状のピグを押し込む方式もある。In the pig system, a jig having a cutting blade called a pig inserted from an end portion such as a pipe is pushed by compressed air or liquid and a rotational force is applied to the jig, and the scale is cut by the cutting blade in accordance with this rotation. This is the method that tries to remove this. As a similar method, there is a method of pushing a so-called brush-shaped pig.
【０００４】一方、ノズル方式は、各種プラントでは通
常配管等の端部にノズルを固定し、このノズルから液体
又は鋼球、サンド、ビーズ等の噴射素材を配管等の管内
面に吹き付け、スケール等の洗浄除去を行う方式であ
る。On the other hand, in the nozzle system, in various plants, a nozzle is usually fixed at the end of a pipe or the like, and a liquid or a jet material such as steel balls, sands, beads or the like is sprayed onto the inner surface of the pipe or the like, a scale or the like. This is a method of cleaning and removing.
【０００５】ピグ方式では、ピグの切削刃が配管等に噛
み込んで、管内面を傷付けることともなり、更には切削
物が配管等に詰まってしまうおそれがある。そして、配
管の太さが異なっている場合、例えば太径の背から細径
の管への押し込みは殆ど不可能であり、そればかりか、
スケール等の洗浄除去の効果は不十分である場合があっ
た。In the pig system, the cutting blade of the pig may be caught in the pipe or the like to damage the inner surface of the pipe, and further, the cut object may be clogged in the pipe or the like. And if the pipes have different thicknesses, for example, it is almost impossible to push from a large-diameter spine into a small-diameter pipe.
The effect of washing and removing the scale and the like was sometimes insufficient.
【０００６】一方、ノズル方式では、粉体や液体を吹き
出す孔やこれら粉体等を供給するホースとの継ぎ目が必
要であるから、ノズル全長が長くなり、しかも加圧され
た粉体や液体を供給するには丈夫な肉厚ホースを用いる
必要があるので、配管等の内径が小さいと、粉体や液体
の供給が不十分となって洗浄効率が低下する。また、同
方法では管内でノズルが傾斜したり偏りが生じた場合、
管内面に処理むらを生じる恐れがあり、完全な管内面の
処理は不可能であった。更に、ノズルにおける粉体や液
体を吹き出す孔の構造によっては管内にむらなく粉体や
液体を当てることができず、処理むら等が発生すること
がある。On the other hand, the nozzle system requires a hole for blowing out the powder or liquid and a joint with a hose for supplying the powder or the like, so that the total length of the nozzle becomes long, and the pressurized powder or liquid can be supplied. Since it is necessary to use a sturdy thick hose for supply, if the inner diameter of the pipe or the like is small, the supply of powder or liquid will be insufficient and the cleaning efficiency will decrease. Also, in the same method, when the nozzle is tilted or biased in the pipe,
There was a risk of uneven treatment on the inner surface of the pipe, and it was impossible to completely treat the inner surface of the pipe. Further, depending on the structure of the hole for blowing out the powder or liquid in the nozzle, the powder or liquid cannot be uniformly applied to the inside of the tube, which may cause uneven processing.
【０００７】[0007]
【発明が解決しようとする課題】本発明はかかる従来の
実状に鑑みてなされたものであり、管内面の十分な処理
が可能であり、しかも、短時間処理を可能とし、狭い作
業スペースにて作業ができることとなった管内面の処理
方法を提供することを目的とする。更に言えば、噴射素
材として好ましくは粉末重曹を選択し、ノズルを管内に
挿入し、これを前後に移動させつつ噴射素材を管内面に
均等に吹き付けることによって、従来の技術よりも低い
圧力でスケールを除去する技術を提供するものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and it is possible to sufficiently process the inner surface of the pipe, and further, it is possible to perform the processing for a short time in a narrow working space. It is an object of the present invention to provide a method for treating the inner surface of a pipe which is ready for work. Furthermore, preferably, powdered baking soda is preferably selected as the injection material, the nozzle is inserted into the tube, and the injection material is sprayed evenly on the inner surface of the tube while moving the nozzle back and forth, so that the scale is produced at a pressure lower than that of the conventional technology. To provide a technique for removing the.
【０００８】[0008]
【課題を解決するための手段】本第１発明の要旨は、ス
ケールが付着した管内面へ噴射素材を吹き付けてなる管
内面処理方法であって、前記管内に噴射素材を圧送する
ホースを備えたノズルを挿入し、噴射素材として好まし
くは粉末重曹を主体とするものを用い、噴射素材を当該
ノズルの前端より管内面に向かって均一に噴射しつつこ
のノズルを前進又は後退させることを特徴とするもの
で、例えば、粉末重曹の粒径が５０〜４００μである。SUMMARY OF THE INVENTION The gist of the first invention is a pipe inner surface treating method in which a jet material is sprayed onto the inner surface of a pipe on which scale is attached, and a hose for feeding the jet material under pressure is provided in the pipe. It is characterized in that a nozzle is inserted, and that a material mainly composed of powdered baking soda is used as an injection material, and the injection material is advanced or retracted while uniformly injecting the injection material from the front end of the nozzle toward the inner surface of the pipe. For example, the particle size of powdered baking soda is 50 to 400 μm.
【０００９】本第２発明の要旨は、中空筒体と、この中
空筒体の後端に噴射素材を圧送するホ−ス側金具と螺合
される螺合部を形成し、中空筒体内中央に後端に向かっ
て円錐状絞り部材を備えるとともに、円錐状絞り部の底
部に筒体周方向に等分の位置に均等にオリフィスを形成
し、次いでオリフィスに連結した前端に向かうに従って
順次拡角とした通路を形成し、前端に至って筒体内表面
全域に通路を広げ、かつ前端に更に円錐台状拡角部材を
備えたノズルであって、被処理管内部にかかるノズルを
挿入しこのノズルを移動しつつノズルの前端より噴射素
材を噴射し、管内面へ噴射素材を均一に吹き付けて管内
面に付着したスケールを処理することを特徴とするノズ
ルに係るものである。The gist of the second aspect of the present invention is to form a hollow cylindrical body and a threaded portion at the rear end of the hollow cylindrical body, which is screwed into a hose side metal fitting for sending the injection material under pressure. Is equipped with a conical throttle member toward the rear end, and orifices are evenly formed in the bottom of the conical throttle part at equal positions in the circumferential direction of the cylinder, and then the angle is gradually increased toward the front end connected to the orifice. Is a nozzle having a passage that extends to the front end and extends over the entire inner surface of the cylinder, and further has a frustoconical angle expanding member at the front end. The present invention relates to a nozzle characterized in that a jet material is jetted from the front end of the nozzle while moving, and the jet material is uniformly sprayed to the inner surface of the tube to treat the scale attached to the inner surface of the tube.
【００１０】[0010]
【発明の実施の形態】本発明は管内を移動可能としたノ
ズル方式による管内面のスケールの除去技術に係るもの
であり、ノズルによって噴射素材、好ましくは粉末重曹
を主体とするものを管内面に従来の工法よりは低圧で均
一に噴射するため、管の内面を傷付けることなく、スケ
ールを除去する技術である。BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a technique for removing scale on the inner surface of a tube by means of a nozzle system that is movable in the tube, and a nozzle is used to apply a spray material, preferably a powdery baking soda powder to the inner surface of the tube. It is a technique that removes scale without damaging the inner surface of the pipe, because it sprays more uniformly at a lower pressure than the conventional method.
【００１１】尚、管内部へノズルを移動させつつ噴射素
材を管内面へ吹き付ける技術としては特開平１０−２１
７１２３号公報があるが、管内面に向かってノズルより
均一に噴射するものではなく、このため、作業中にノズ
ルが管内面に衝突することが絶えず起こり、管内面を傷
付けるため実際的ではない。本発明はかかる技術を改良
したものであるといっても過言ではない。A technique for spraying the injection material onto the inner surface of the pipe while moving the nozzle into the pipe is disclosed in Japanese Patent Laid-Open No. 10-21.
Although there is a Japanese Patent No. 7123 publication, it is not jetted uniformly from the nozzle toward the inner surface of the pipe, and therefore, the nozzle constantly collides with the inner surface of the pipe during work, and the inner surface of the pipe is damaged, which is not practical. It is no exaggeration to say that the present invention is an improvement of such a technique.
【００１２】噴射素材としては前記したように液体又は
鋼球、サンド、ビーズ等があり、これを管内面に向けて
均一に噴射してスケールを除去することとなるが、ここ
では最も効果的である粉末重曹の例をもって更に詳細に
説明する。粉末重曹は近年になって噴射素材として注目
され、それ自体が水に溶解し事後処理が簡単でかつ無公
害であるという利点がある。即ち、管内面の効果的な処
理方法が望まれる一方で、河川や海洋の水質保全の観点
から満足する必要もある。このような特徴ある粉末重曹
を噴射素材として使用するものであり、これを管内面に
均等に吹き付けることによりスケールが除去される。そ
して、管内面に粉末重曹が付着していたとしても人体に
害を及ぼさないため、安全衛生上有利である。更に、粉
末重曹は水溶性があり、水溶液は弱アルカリ性を示すた
め、油脂類を含んだ排水が粉末重曹の界面活性効果によ
り排水管等の詰まりを防ぐ面からも排水処理の簡略化に
寄与する。As the jetting material, there are liquid or steel balls, sands, beads, etc. as mentioned above, and this is uniformly jetted toward the inner surface of the pipe to remove the scale, but it is most effective here. It will be described in more detail with an example of a powdered baking soda. In recent years, powdered baking soda has attracted attention as an injection material, and it has the advantage that it dissolves in water and can be easily post-treated and is non-polluting. That is, while an effective treatment method for the inner surface of the pipe is desired, it is necessary to be satisfied from the viewpoint of water quality conservation of rivers and oceans. Such characteristic powdered baking soda is used as an injection material, and the scale is removed by uniformly spraying this on the inner surface of the pipe. Even if powdered baking soda adheres to the inner surface of the tube, it does not harm the human body, which is advantageous in terms of safety and hygiene. Furthermore, since powdered baking soda is water-soluble and the aqueous solution shows weak alkalinity, drainage containing oils and fats also contributes to simplification of wastewater treatment from the viewpoint of preventing clogging of drain pipes and the like due to the surfactant effect of powdered baking soda. .
【００１３】本発明は、以上のように優れた利点を持つ
噴射素材（好ましくは粉末重曹）を管内面のスケ−ルの
除去に利用し、噴射素材を圧縮空気を用いて管内面のス
ケ−ルに均等に吹き付ける技術である。更に、ノズルに
関して言えば、ノズル内にて噴射素材の流れを円錐状絞
り部材にて一旦絞り、これをオリフィス〜通路にて一気
に噴射し、ノズルの前端に至ってその全周に均等に噴射
させるものであり、更に管内面に効果的に噴射させるた
めに更にこれをノズルの外側に向けて拡径しつつ噴射さ
せるものである。尚、大量のスケ−ルが付着しているよ
うな場合には、ノズルを挿入する前に任意の手段でスケ
−ル除去し、ほぼ均一なスケ−ル状況としておくのがよ
い。In the present invention, the injection material (preferably powdered baking soda) having the above-mentioned advantages is used for removing the scale on the inner surface of the pipe, and the injection material is compressed on the inner surface of the pipe using compressed air. It is a technique that sprays evenly on the le. Further, regarding the nozzle, the flow of the material to be jetted is once throttled in the nozzle by a conical throttling member, and this is jetted all at once from the orifice to the passage to reach the front end of the nozzle and evenly jet it all around. Further, in order to further effectively inject into the inner surface of the pipe, the diameter is further increased toward the outside of the nozzle to inject. If a large amount of scale is attached, it is preferable to remove the scale by any means before inserting the nozzle so that a substantially uniform scale condition is obtained.
【００１４】以下、ノズルについて更に言及すると、ノ
ズルを構成する中空筒体はステンレス、チタン、タング
ステン、鉄、強化プラスチック等にて製造されたもので
特に限定はなく、被処理管の径に準じて適当な太さのも
のが選択されるもので、例えば、処理される管φ１５〜
１００ｍ／ｍに対応してこれよりもやや細目のノズルが
選択される。かかるノズルには後端に噴射素材を圧送す
るホース側金具と螺合される螺合部（雌ネジ部）が形成
され、次いで絞り部材が挿入される大径部が形成されて
いる。そして、後述する絞り部材を支持するために段部
が形成され、前端に向かって順次径が拡大する傾斜内面
部を備えているものであり、更に、この通路の方向を外
側に向けて変更する円錐台状拡角部材が中空筒体の先端
に備えられているのがよい。Further referring to the nozzle, the hollow cylindrical body constituting the nozzle is made of stainless steel, titanium, tungsten, iron, reinforced plastic, etc., and is not particularly limited, and may be in accordance with the diameter of the pipe to be treated. An appropriate thickness is selected, for example, the pipe to be processed φ15 ~
Corresponding to 100 m / m, a nozzle slightly finer than this is selected. A threaded portion (female screw portion) that is screwed into a hose side metal fitting for sending the injection material under pressure is formed at the rear end of this nozzle, and then a large diameter portion into which the throttle member is inserted is formed. A step portion is formed to support a throttle member, which will be described later, and an inclined inner surface portion whose diameter gradually increases toward the front end. Further, the direction of this passage is changed to the outside. A frustoconical angle expanding member may be provided at the tip of the hollow cylindrical body.
【００１５】中空筒体内にはその中央軸に添って円錐状
の絞り部材と噴射素材通路を構成する通路部材が挿入さ
れる。円錐状の絞り部材は後端に向かって配置され、そ
の底部周囲は中空筒体の段部に係止させ、これを溶接す
ることとなる。そして、通路部材は傾斜内面部と一定の
間隔を隔てた平行面を有するもので、この間隔を埋める
ピースをもって噴射素材の通路を形成するものである。
このピースは平面三角状をなしており、粉体の通路は円
錐状の底部周囲に形成してある通孔から前端に向かって
順次拡角としたものであり、通路が中空筒体の内面に至
った際に中空筒体内面を丁度拡がるように拡角されたも
ので、この部位は中空筒体の前端部である。この拡角角
度は左右に拡角（好ましくは約３．５度ずつ）した形状
がよい。そして、この通路の方向を外側に向けて変更す
る円錐台状拡角部材が中空筒体の先端に備えられる。A conical throttling member and a passage member forming an injection material passage are inserted along the central axis of the hollow cylindrical body. The conical throttle member is arranged toward the rear end, and the periphery of the bottom is locked to the stepped portion of the hollow cylindrical body and welded. The passage member has a parallel surface which is spaced apart from the inclined inner surface portion by a certain distance, and a piece for filling this distance forms a passage for the injection material.
This piece has a flat triangular shape, and the powder passages are formed by gradually increasing the angle from the through hole formed around the bottom of the cone toward the front end, and the passage is formed on the inner surface of the hollow cylindrical body. When it reaches, the inside of the hollow cylinder is expanded so as to just widen it, and this portion is the front end of the hollow cylinder. It is preferable that the angle of expansion is laterally expanded (preferably about 3.5 degrees each). Then, a truncated cone-shaped widening member that changes the direction of this passage outward is provided at the tip of the hollow cylindrical body.
【００１６】通常の方法にあって、ノズルに所定量の噴
射素材を供給するために、この噴射素材を加圧タンク内
に充填し、タンク底部に流量バルブを備え圧縮空気が流
れる導管に対して所定量の噴射素材が流れ込む圧送方式
が採られ、コンプレッサーから送出される高圧エアによ
って収納タンク内の噴射素材がノズルへ圧送されて噴射
される。In a conventional method, in order to supply a predetermined amount of the injection material to the nozzle, the injection material is filled in a pressurized tank, and a flow valve is provided at the bottom of the tank to a conduit through which compressed air flows. A pressure feed system in which a predetermined amount of the injection material flows is adopted, and the injection material in the storage tank is pressure-fed to the nozzle by high-pressure air sent from the compressor.
【００１７】噴射素材としては前記したように各種のも
のが用いられ得るが、最も好ましいのは粉末重曹であっ
て、この粒径としては、５０〜４００μのものがよく、
その噴射量は０．７〜２．４ｋｇ／分、噴射圧力は１．
５〜６ｋｇｆ／ｃｍ2 、好ましくは２〜４ｋｇｆ／ｃｍ
2 である。勿論、これらの噴射素材を適当に混ぜ合わせ
て使用することもよく、好ましくは粉末重曹を主体とし
て、他の噴射素材を少量混ぜ合わせたものを用いること
ができる。Various materials can be used as the injection material as described above, but the most preferable one is powdered baking soda having a particle size of 50 to 400 μm.
The injection amount is 0.7 to 2.4 kg / min, and the injection pressure is 1.
5-6 kgf / cm 2 , preferably 2-4 kgf / cm
Is 2 . Of course, these spray materials may be appropriately mixed and used, and preferably, powdered baking soda is mainly used and a small amount of another spray material is mixed.
【００１８】上記した噴射ノズルの構造の具体的形態と
しては、以下の点に特徴がある。円錐状絞り部の頂角は
筒体の中心軸に対して約３０度であり、円錐状絞り部の
底部に２〜４のオリフィスが均等に配置されたものであ
る。The specific features of the structure of the above-mentioned injection nozzle are characterized by the following points. The apex angle of the conical throttle portion is about 30 degrees with respect to the central axis of the tubular body, and 2 to 4 orifices are evenly arranged at the bottom of the conical throttle portion.
【００１９】そして、各スリットに連なる通路は筒体の
径方向に約１〜３ｍｍの隙間であり、その前端に至って
各通路が筒体の内周で連なるように３．５〜５度の角度
・ａをもって拡がって形成されている。この通路は前端
に向けて０〜５度（好ましくは３．５度）の角度・ｂを
もって筒体中心より遠ざかるように傾斜配置されてい
る。The passage connected to each slit is a gap of about 1 to 3 mm in the radial direction of the cylindrical body, and an angle of 3.5 to 5 degrees is provided so that the passages reach the front end and are connected to the inner circumference of the cylindrical body.・ It is formed by expanding with a. This passage is arranged so as to be inclined from the center of the cylinder at an angle b of 0 to 5 degrees (preferably 3.5 degrees) toward the front end.
【００２０】筒体の前端には通路内から噴出する粉末重
曹の流れを更に外向きに変えるように円錐台状拡角部材
が配置され、この１５〜４５度・ｃ（好ましくは２０〜
３０度）内の傾斜面をもつものである。A frusto-conical angle expanding member is arranged at the front end of the cylindrical body so that the flow of the powdered baking soda ejected from the passage is further outwardly directed.
It has an inclined surface within 30 degrees.
【００２１】尚、ノズルは管の中央に維持されるのが好
ましいことは言うまでもなく、このため、筒体の外表面
にその全方向にスペーサーを備える場合もある。このス
ぺーサーは、好ましくは多数の柔軟な線状体を起立さ
せ、更に具体的にはブラシ状毛足であって、その毛足の
長さは２〜５０ｍｍ程度である。即ち、ノズルの管径は
処理される管の径よりも４ｍｍ以下の細径のものであ
り、この両者の隙間をスぺーサーが埋めてノズルを管の
中央に常に維持されることになり、ノズルが管内で傾く
か又は管の一方に片寄る力が加わっても、スペーサーに
よって隙間が確保できて処理むらもなく管内面の処理が
可能となるからである。又、このスぺーサーは噴射時に
おける被処理管内への空気の供給口ともなる。Needless to say, it is preferable that the nozzle is maintained at the center of the tube. For this reason, the outer surface of the cylinder may be provided with spacers in all directions. This spacer preferably stands up a large number of flexible linear bodies, and more specifically, it is a brush-like bristle having a length of about 2 to 50 mm. That is, the diameter of the nozzle is smaller than the diameter of the pipe to be treated by 4 mm or less, and the gap between the two is filled with a spacer so that the nozzle is always maintained at the center of the pipe. This is because even if the nozzle is tilted in the tube or a force is applied to one side of the tube, a gap can be secured by the spacer and the inner surface of the tube can be processed without uneven processing. Further, this spacer also serves as a supply port of air into the pipe to be treated at the time of injection.
【００２２】勿論、第１発明における管内部に挿入され
るノズルは上記のものに限定されるものではなく、後述
するような構造のものも採用可能である。尚、管内部を
噴射素材が高速で移動するが、両者の摩擦により静電気
が発生するおそれがある。この場合、静電気を放電する
のが望ましく、このため、管とノズル側のホースにアー
ス線を備えておくのがよく、作業中に管とノズル間を電
気的に連結する装置が備えられるのがよい。Of course, the nozzle to be inserted into the pipe in the first invention is not limited to the above-mentioned one, and the structure described later can be adopted. Although the injection material moves at high speed inside the pipe, static electricity may be generated due to friction between them. In this case, it is desirable to discharge static electricity, and therefore it is preferable to equip the tube and the hose on the nozzle side with a ground wire, and to provide a device for electrically connecting the tube and the nozzle during work. Good.
【００２３】[0023]
【実施例】図１は本発明の管内面処理方法の概念図であ
る。Ａは処理される管であり、内面にスケールが付着し
たものである。Ｂはノズルであって、その前端に管Ａの
内面に向かって噴射素材を均一に噴射する噴射ロがあ
り、後端に噴射素材を圧送するホースＣが備えられてい
る。そして、管Ａの一方端からノズルＢを前進させ（矢
印ａ方向）、或いは後退（矢印ｂ方向）させつつ、ホー
スＣよりノズルＢに噴射素材を圧送し、管内面に向けて
噴射してスケールを管Ａの内面より剥離させるものであ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a conceptual diagram of the pipe inner surface processing method of the present invention. A is a tube to be treated, and has a scale attached to its inner surface. Reference numeral B denotes a nozzle, which has an injection nozzle for uniformly injecting the injection material toward the inner surface of the pipe A at its front end and a hose C for pumping the injection material at its rear end. Then, while the nozzle B is moved forward (in the direction of arrow a) or retracted (in the direction of arrow b) from one end of the pipe A, the injection material is pressure-fed to the nozzle B from the hose C and is jetted toward the inner surface of the pipe to scale. Is separated from the inner surface of the pipe A.
【００２４】ノズルＢはその前端より管内面に向けて均
一に噴射させるため、作業中はノズルＢが管Ａのほぼ中
央に維持され、基本的には管Ａ内面とノズルＢとの接触
はないという特徴がある。Since the nozzle B is sprayed uniformly from the front end toward the inner surface of the tube, the nozzle B is maintained substantially at the center of the tube A during operation, and basically there is no contact between the inner surface of the tube A and the nozzle B. There is a feature called.
【００２５】図２は本第２発明の管内面処理のためのノ
ズルＢの側面図、図３は前端図、図４は後端図である。
図中、１０はステンレス製の中空筒体、２１は円錐台状
拡角部材、３１は中空筒体の外周に備えたブラシ状スペ
ーサーである。FIG. 2 is a side view of the nozzle B for inner surface treatment of the second invention, FIG. 3 is a front end view, and FIG. 4 is a rear end view.
In the figure, 10 is a hollow cylindrical body made of stainless steel, 21 is a frustoconical angle expanding member, and 31 is a brush-like spacer provided on the outer periphery of the hollow cylindrical body.
【００２６】図５は中空筒体１０（外径３０ｍｍ、長さ
１１５ｍｍ）のみを取り出した半裁側面図であり、後端
側１０ｂに図示しない噴射素材を輸送するホースＣ側の
金具と螺合される螺合部（雌ネジ部）１１が形成されて
いる。これに続いて大径の胴部１２（内径２１ｍｍ）が
形成されている。そして胴部１２の最深部に小径の段部
１３が形成される。この段部１３の幅は２ｍｍ（通常は
１〜２ｍｍ）程度のものである。この段部１３は中空筒
体１０のほぼ中央に位置する。この段部１３は後述する
円錐状絞り部材２２の底部２３を係止しこれを溶接する
部位であり、この溶接が不完全で剥れたとしても円錐状
絞り部材２２が前端側に飛び出さないようにする機能を
もっている。この円錐状絞り部材２２の底部２３には３
つのオリフィス２４（オリフィス断面はこの例では２×
６ｍｍ）が均等に配置されている。そして、この段部１
３より前端１０ａに向かって順次拡径する傾斜胴部１４
が形成されている。この傾斜胴部１４はオリフィス２４
と繋がり後述する粉末重曹が流れる通路の一部を形成す
ることになる。傾斜胴部１４の傾斜角（ｂ）は約３．５
度である。なお、オリフィスの大きさはノズルの径によ
って異なるが、例えば１×１２ｍｍのものも採用でき
る。FIG. 5 is a half-cut side view showing only the hollow cylindrical body 10 (outer diameter 30 mm, length 115 mm), which is screwed to a rear end side 10b with a metal fitting on the hose C side for transporting the injection material (not shown). A threaded portion (female screw portion) 11 is formed. Following this, a large-diameter body portion 12 (inner diameter 21 mm) is formed. Then, a step portion 13 having a small diameter is formed at the deepest portion of the body portion 12. The width of the step portion 13 is about 2 mm (normally 1 to 2 mm). The stepped portion 13 is located substantially at the center of the hollow cylindrical body 10. The stepped portion 13 is a portion where a bottom portion 23 of a conical diaphragm member 22 described later is locked and welded thereto. Even if the welding is incomplete and the conical diaphragm member 22 is peeled off, the conical diaphragm member 22 does not project to the front end side. Has a function to do so. The bottom portion 23 of the conical diaphragm member 22 has 3
Two orifices 24 (orifice cross section is 2 x in this example)
6 mm) are evenly arranged. And this step 1
Inclined body portion 14 that gradually increases in diameter from 3 toward the front end 10a
Are formed. The inclined body portion 14 has an orifice 24.
It forms a part of the passage through which powdered baking soda, which will be described later, flows. The inclination angle (b) of the inclined body portion 14 is about 3.5.
It is degree. The size of the orifice varies depending on the diameter of the nozzle, but a nozzle having a size of 1 × 12 mm can also be used.
【００２７】図５にあって、３１は中空筒体１０の外周
に備えたブラシ状スペーサー（この例では長さ５ｍｍ程
度のブラシ状毛足の起立線状体）であり、このブラシ状
スペーサー３１の存在により図１のノズルＢが管Ａの内
面中心位置に常に維持されることになり、又、ノズルＢ
の前端側に供給される空気の供給口ともなる。In FIG. 5, reference numeral 31 is a brush-like spacer provided on the outer periphery of the hollow cylindrical body 10 (in this example, a standing linear body of brush-like hairs having a length of about 5 mm). Due to the presence of the nozzle B, the nozzle B in FIG. 1 is always maintained at the center position of the inner surface of the pipe A.
It also serves as a supply port for the air supplied to the front end side of the.
【００２８】図６は中空筒体１０の内部に装着される各
部材の半裁側面図、図７は図６の９０度回転した側面図
である。各部材は中空筒体１０の後端１０ｂに向かって
頂部２２ａを配置し、底部２３が段部に溶接された円錐
状絞り部材２２と、この底部２３に上底側が溶接され、
通路形成部材２５として下底部２５ａを前端側にした円
錐台部材２５Ａを配置するものであり、円錐台部材２５
Ａの表面と傾斜胴部１４との隙間を２ｍｍとしたもので
ある。図において、２５Ｂはシム部材であり、その厚さ
は２ｍｍで傾斜胴部１４と円錐台部材２５Ａとの間の隙
間を埋めて通路２６が形成されるものである。即ち、各
オリフィス２４間と筒体１０の前端１０ａとの間に差し
渡されるもので、前端１０ａに至って各通路２６が広が
って繋がる構造としたものである。言い換えれば、平面
視で二等辺三角形をなし、前端１０ａ（三角形の頂点）
に向かって角度ａ（三角形の底辺の角度は９０−ａ）を
有し、三角形の底辺２５Ｂｂがオリフィス２４、２４間
の間隔となるものである。円錐台状拡角部材２１は中空
筒体１０の前端より突出して備えられるもので、通路２
６によって噴射される噴射素材の向きを更に角度を広げ
てやるものであり、この角度（ｃ）は管内面に付着した
スケールの種類や大きさ、厚さ等にて噴射素材の吹き付
け角度を変更可能である。FIG. 6 is a half-cut side view of each member mounted inside the hollow cylindrical body 10, and FIG. 7 is a side view rotated 90 degrees in FIG. Each member has a top 22a arranged toward the rear end 10b of the hollow cylindrical body 10, a conical drawing member 22 having a bottom 23 welded to a step, and an upper bottom side welded to the bottom 23.
As the passage forming member 25, a truncated cone member 25A having a lower bottom portion 25a on the front end side is arranged.
The gap between the surface of A and the inclined body portion 14 is 2 mm. In the figure, 25B is a shim member, the thickness of which is 2 mm, and the passage 26 is formed by filling the gap between the inclined body portion 14 and the truncated cone member 25A. That is, it is arranged between the orifices 24 and the front end 10a of the cylindrical body 10, and has a structure in which the passages 26 are spread and connected to reach the front end 10a. In other words, it forms an isosceles triangle in plan view, and the front end 10a (the apex of the triangle)
The angle a (the angle of the base of the triangle is 90-a) is directed toward, and the base 25Bb of the triangle is the distance between the orifices 24, 24. The truncated cone-shaped widening member 21 is provided so as to project from the front end of the hollow cylindrical body 10, and is provided with the passage 2
The angle of the spray material to be sprayed by 6 is further widened. This angle (c) changes the spray angle of the spray material depending on the type, size, thickness, etc. of the scale attached to the inner surface of the pipe. It is possible.
【００２９】図８は図２におけるＡーＡ線での端面図、
図９はＢーＢ線での端面図、図１０はＣーＣでの端面
図、図１１はＤーＤ線での端面図である。これらの端面
図をもって噴射素材の流れを説明すると、ホースより加
えられる噴射素材の流れは中空筒体１０の内部に導かれ
（ＡーＡ断面）、円錐状絞り部材２２に至って流れが絞
られ、更に流速を増し、オリフィス２４内に流れ込み、
次いで通路２６内にてこれが一気に広がり、筒体１０の
前端に至って全周に均等に吹き出すことになる。そし
て、円錐台状拡角部材２１の傾斜面に添って更に流れが
拡角されて被管内面に至るものである。FIG. 8 is an end view taken along the line AA in FIG.
9 is an end view taken along line BB, FIG. 10 is an end view taken along line CC, and FIG. 11 is an end view taken along line DD. Explaining the flow of the injection material with these end views, the flow of the injection material added from the hose is guided to the inside of the hollow cylindrical body 10 (AA cross section), reaches the conical throttle member 22, and the flow is throttled. Further increase the flow velocity, flow into the orifice 24,
Then, this spreads at once in the passage 26 and reaches the front end of the cylindrical body 10 and blows out evenly over the entire circumference. Then, the flow is further expanded along the inclined surface of the truncated cone-shaped widening member 21 to reach the inner surface of the pipe.
【００３０】尚、ア−スについて言えば、スペーサー３
１が金属製のものであれば、ノズルＢと管Ａの内面との
間に生じる静電気を効果的に逃すことが可能ともなる。
又、図示はしないが、ノズルＢから伸びるア−ス線を備
えておき、一方のホ−スＣにはア−ス線が埋められたも
のを採用し、ノズルＢとホ−スＣとの結合の際にア−ス
線同士を連結することも可能である。更には、ノズルＢ
とホ−スＣとの連結に供されるリングに放射状に複数の
止めねじを備え、この止めねじを締めることによって両
者を連結するとともに、この止めねじをやや突出した状
態で維持し、これによってノズルＢが管Ａの中央に維持
されるとともに、止めねじと被処理管内面との接触によ
りア−ス作用をもたらすことも可能である。勿論、場合
によってはかかる止めねじの頭部に例えば導電性のゴム
キャップを被せる構造とすることも可能である。As for the earth, the spacer 3
If 1 is made of metal, it is possible to effectively eliminate static electricity generated between the nozzle B and the inner surface of the pipe A.
Further, although not shown, an earth wire extending from the nozzle B is provided and one of the hoses C is filled with the earth wire, so that the nozzle B and the hose C are connected to each other. It is also possible to connect the ground lines at the time of coupling. Furthermore, nozzle B
The ring used for connecting the hose C and the hose C is provided with a plurality of set screws in a radial manner, and by tightening the set screws, the two are connected to each other, and the set screws are maintained in a state of being slightly projected. It is also possible to maintain the nozzle B in the center of the pipe A and to provide an earth action by contact between the set screw and the inner surface of the pipe to be treated. Of course, in some cases, the set screw head may be covered with, for example, a conductive rubber cap.
【００３１】以下、実験例をもって更に説明する。
（実験例１）噴射素材としての粉末重曹はフローフォー
ミュラＸＬ（粒径３００μ級）、空気圧（噴射圧）は４
ｋｇｆ／ｃｍ2 、粉末重曹吐出量は１ｋｇ／分、使用し
たノズルＢは図例（ただし、スペーサー３１は除く）の
ものである。以上の設定により内外共に錆の発生がひど
い鉄管Ａ（φ５０ｍ／ｍ）を１０ｃｍ程半割にして切り
落とし、鉄管Ａ内の錆の程度を確認してから６ｍ長さの
当該鉄管Ａ内にノズルＢを挿入して往復約２分間噴射し
た。その後、その鉄管Ａの無作為に選んだ個所を長さ約
１０ｃｍ半割にして切り落とし内面を検査した。処理後
の鉄管Ａの内面は黒皮を残して錆は全て除去され、更に
クレーター状になっている凹凸面の状態がよく分かり、
鉄管Ａの減肉の状態も確認できた。The experiment will be further described below. (Experimental Example 1) Powdered baking soda as an injection material has a flow formula XL (particle size 300 μ class) and an air pressure (injection pressure) of 4
kgf / cm 2 , the amount of powdered baking soda discharged was 1 kg / min, and the nozzle B used was as shown in the figure (except for the spacer 31). With the above settings, the iron pipe A (φ50 m / m) where rust is severely generated both inside and outside is cut off in half by about 10 cm, and after checking the degree of rust in the iron pipe A, the nozzle B is inserted into the iron pipe A of 6 m in length. Was inserted and jetted back and forth for about 2 minutes. After that, a randomly selected portion of the iron pipe A was cut into halves with a length of about 10 cm, and the inner surface was cut off and inspected. After the treatment, the inner surface of the iron pipe A had all the rust removed leaving a black skin, and the state of the crater-like uneven surface was well understood.
The state of thinning of the iron pipe A was also confirmed.
【００３２】（実験例２）用いた粉末重曹はフローフォ
ーミュラＸＬ（粒径３００μ級）、空気圧（噴射圧）は
４ｋｇｆ／ｃｍ2 、粉末重曹吐出量は１ｋｇ／分、使用
したノズルＢは図例（ただし、スペーサー３１は除く）
のものである。以上の設定により内面に錆とかなりひど
い工業用水の乳白濁色したカルシウム分等の固着したス
ケールの付いた熱交換用の鉄管Ａ（φ１９．８６ｍ／
ｍ）を１０ｃｍ程半割にして切り落とし、鉄管Ａ内の錆
の程度を確認してからＵ字状に曲がっている当該鉄管Ａ
（直線部の長さ７ｍ、Ｒ部は４０Ｒ）の両直線部よりノ
ズルＢを挿入し管Ａ内で往復約２分間噴射した。その
後、その鉄管Ａの無作為に選んだ個所を半割にして切り
落として内面を検査した。処理後の鉄管の内面は黒皮を
残して錆及び固着スケールは全て除去され、更にクレー
ター状になっている凹凸面の状態がよく分かり、鉄管Ａ
の減肉の状態も確認できた。尚、ノズルＢを通していな
いＲ部も直線部と遜色のない仕上がりであることを確認
した。(Experimental Example 2) The powdered baking soda used was Flow Formula XL (particle size 300 μ class), the air pressure (injection pressure) was 4 kgf / cm 2 , the powdered baking soda discharge rate was 1 kg / min, and the nozzle B used was as shown in the figure. (However, spacer 31 is excluded)
belongs to. With the above settings, the heat exchange iron pipe A (φ19.86m / φ19.86m /
m) is cut in half in about 10 cm, and after checking the degree of rust in the iron pipe A, the iron pipe A is bent in a U shape.
The nozzle B was inserted from both straight line portions (the length of the straight line portion was 7 m and the R portion was 40 R), and the reciprocation was performed in the pipe A for about 2 minutes. After that, the randomly selected part of the iron pipe A was cut in half and cut off to inspect the inner surface. After the treatment, all the rust and adhered scales were removed, leaving a black skin on the inner surface of the iron pipe, and the condition of the crater-like uneven surface was well understood.
It was also possible to confirm the state of thinning. In addition, it was confirmed that the R portion not passing through the nozzle B had a finish comparable to that of the straight portion.
【００３３】以上の実験例は、全て超音波回転プローブ
・チューブ探傷システム『ＩＲＩＳ』による試験でも確
認している。The above experimental examples have all been confirmed by tests using an ultrasonic rotary probe / tube flaw detection system "IRIS".
【００３４】図１２は本発明の管内面処理方法に用いら
れるノズルＢの別例を示す側面図であり、図１３はその
前端図である。図中、符号４０はステンレス製のノズル
筒体であり、この後端側４０ｂには粉末重曹を圧送する
ホース側金具と螺合する雌ネジ部４１が備えられてい
る。４２は筒体４０の中央に備えた円錐状絞り部材であ
り、この円錐状絞り部材４２の底に当たる部位４３には
流路４４が４〜８が均等に形成されている。かかる流路
４４は筒体４０の前端４０ａに向かって貫通しており、
その仰角（α）（流路４４の拡がり角度）は３０度であ
る。一方、この流路４４は前端面裾で時計回りと逆方向
に２０度ねじれ角（β）をなしている。FIG. 12 is a side view showing another example of the nozzle B used in the pipe inner surface processing method of the present invention, and FIG. 13 is a front end view thereof. In the figure, reference numeral 40 is a nozzle cylinder made of stainless steel, and the rear end side 40b is provided with a female screw portion 41 that is screwed into a hose side metal fitting for feeding powdered baking soda under pressure. Reference numeral 42 denotes a conical throttle member provided in the center of the tubular body 40, and in a portion 43 corresponding to the bottom of the conical throttle member 42, channels 4 to 8 are evenly formed. The flow channel 44 penetrates toward the front end 40a of the tubular body 40,
The elevation angle (α) (divergence angle of the flow path 44) is 30 degrees. On the other hand, the flow path 44 has a twist angle (β) of 20 degrees in the direction opposite to the clockwise direction at the hem of the front end face.
【００３５】ここで粉末重曹側から言えば、圧送するホ
ースより圧縮空気と共に筒体４０に導かれ、円錐状絞り
部材４３をもって一旦絞り込まれ、その後流路４４より
一気に均一に吹き出し管Ａ内面に衝突するものである。
その際、各流路４４は仰角（α）とねじれ角（β）が特
定されているため、ノズルＢが挿入される管Ａの内面に
向けてしかもその表面をサイクロン現象をもたらしなが
ら回転噴射するものであって、このため、管Ａ内面に付
着するスケールに対して極めて均一に衝突することにな
り、スケールの除去が確実となるのである。Speaking from the powder baking soda side, it is guided to the tubular body 40 together with the compressed air from the hose to be pumped, is once narrowed down by the conical throttling member 43, and then uniformly collides with the inner surface of the blowing pipe A at once from the flow passage 44. To do.
At that time, since the elevation angle (α) and the twist angle (β) of each flow path 44 are specified, the rotary injection is performed toward the inner surface of the pipe A into which the nozzle B is inserted and while causing the cyclone phenomenon on the surface. For this reason, the scale attached to the inner surface of the pipe A collides extremely uniformly, and the scale is reliably removed.
【００３６】[0036]
【発明の効果】本発明によれば、ノズルから所定の角度
をもって管内面に噴射素材を噴射するものであって、圧
縮空気により噴射素材を被管内面に吹き付け、スケール
を除去するものであり、管内表面が均一に処理できるこ
ととなったものである。According to the present invention, the jet material is jetted from the nozzle to the inner surface of the pipe at a predetermined angle, and the jet material is sprayed on the inner surface of the pipe by compressed air to remove the scale. The inner surface of the tube can be treated uniformly.
【００３７】具体的な効果として粉末重曹を用いた際の
特徴は以下の通りである。
イ）水を使ったφ１５〜１００ｍ／ｍの小径の管の洗浄
と比べると、洗浄圧力は１／２００以下であり、管への
影響が少ない。
ロ）管の端部から噴射するサンド工法のように母材を減
肉しない。特に、Ｕ部の母材を減肉しない。
ハ）小径管の非破壊検査等における精度を要求される検
査の前処理（下地処理）に当該ノズルを使用した粉末重
曹の噴射洗浄工法は特に効果が大きく、こびりついたス
ケールが完全に除去できた。
ニ）当該ノズルを使用する粉末重曹の噴射洗浄工法は、
ノズルを管内に挿入できるため１．５〜６ｋｇｆ／ｃｍ
2 程度の低い圧力で短時間にスケールを取り除くことが
できる。
ホ）熱交換機の配管内の洗浄には、従来は水、サンド、
樹脂等による噴射洗浄や化学洗浄が用いられてきたが、
コストが高く、処理後の噴射素材の措置も必要であった
が、当該ノズルを用いた洗浄工法は安価な方法で処理が
できる。The characteristics of using powdered baking soda as the specific effects are as follows. B) Compared with the case of cleaning a small diameter pipe of φ15 to 100 m / m using water, the cleaning pressure is 1/200 or less, and the influence on the pipe is small. B) Do not reduce the thickness of the base metal as in the sanding method in which it is injected from the end of the pipe. In particular, the base metal of the U part is not thinned. C) The spray cleaning method of powdered baking soda using the nozzle as a pretreatment (primary treatment) for inspection that requires accuracy in non-destructive inspection of small diameter pipes was particularly effective, and the stuck scale could be completely removed. . D) The spray cleaning method for powdered baking soda using the nozzle is
Since the nozzle can be inserted into the pipe, 1.5-6 kgf / cm
A pressure as low as 2 can remove the scale in a short time. E) For cleaning the inside of the heat exchanger pipe, water, sand,
Injection cleaning and chemical cleaning with resin etc. have been used,
Although the cost is high and it is necessary to take measures for the sprayed material after the treatment, the cleaning method using the nozzle can be treated by an inexpensive method.
【図１】図１は本発明の管内面処理方法の概念図であ
る。FIG. 1 is a conceptual diagram of a pipe inner surface processing method of the present invention.
【図２】図２は本発明の管内面処理噴射素材用ノズルの
側面図である。FIG. 2 is a side view of a nozzle for a pipe inner surface processing injection material of the present invention.
【図３】図３は図２のノズルの前端図である。FIG. 3 is a front end view of the nozzle of FIG.
【図４】図４は図２のノズルの後端図である。FIG. 4 is a rear end view of the nozzle of FIG.
【図５】図５は中空筒体のみを取り出した半裁側面図で
ある。FIG. 5 is a half-cut side view showing only a hollow cylinder.
【図６】図６は中空筒体の内部に装着される各部材の半
裁側面図である。FIG. 6 is a half-cut side view of each member mounted inside the hollow cylindrical body.
【図７】図７は図６の９０度回転した各部材の側面図で
ある。7 is a side view of each member rotated 90 degrees in FIG. 6;
【図８】図８は図２におけるＡーＡ線での端面図であ
る。8 is an end view taken along the line AA in FIG.
【図９】図９は図２におけるＢーＢ線での端面図であ
る。FIG. 9 is an end view taken along line BB in FIG.
【図１０】図１０は図２におけるＣーＣ線での端面図で
ある。10 is an end view taken along the line CC in FIG.
【図１１】図１１は図２におけるＤーＤ線での端面図で
ある。11 is an end view taken along the line DD in FIG.
【図１２】図１２は本発明の管内面処理方法に用いられ
る別のノズルの側面図である。FIG. 12 is a side view of another nozzle used in the pipe inner surface processing method of the present invention.
【図１３】図１３は図１２における前端図である。FIG. 13 is a front end view of FIG.
Ａ‥被処理管、
Ｂ‥ノズル、
Ｃ‥ホース、
１０、４０‥ステンレス製の中空筒体、
１０ａ、４０ａ‥中空筒体の前端、
１０ｂ、４０ｂ‥中空筒体の後端、
１１、４１‥螺合部（雌ネジ部）、
１２‥大径の胴部、
１３‥段部、
１４‥傾斜胴部、
２１‥円錐台状拡角部材、
２２、４２‥円錐状絞り部材、
２２ａ‥円錐状絞り部材の頂部、
２３、４３‥円錐状絞り部材の底部、
２４、４４‥オリフィス（流路）、
２５‥通路形成部材、
２５Ａ‥円錐台部材、
２５Ｂ‥シム部材、
２５Ｂｂ‥シム部材の底辺、
２６‥通路、
３１‥中空筒体の外周に備えたブラシ状スペーサー、
ａ‥シム部材の広がり角（通路の周方向の広がり角）、
ｂ‥円錐台部材の広がり角（通路の径方向の広がり
角）、
ｃ‥円錐台状拡角部材の広がり角、
α‥流路の仰角、
β‥流路のねじれ角。A ... Pipe to be treated, B ... Nozzle, C ... Hose, 10, 40 ... Hollow cylinder made of stainless steel, 10a, 40a ... Front end of hollow cylinder, 10b, 40b ... Rear end of hollow cylinder, 11, 41 ... Screw portion (female screw portion), 12 ... Large-diameter body portion, 13 ... Step portion, 14 ... Inclined body portion, 21 ... Frusta-conical widening member, 22,42 ... Conical diaphragm member, 22a ... Conical shape Top of throttling member, 23, 43 ... Bottom of conical throttling member, 24, 44 ... Orifice (flow passage), 25 ... Passage forming member, 25A ... Frustum member, 25B ... Shim member, 25Bb ... Bottom of shim member, 26: passage, 31: brush-like spacer provided on the outer circumference of the hollow cylindrical body, a: spread angle of shim member (circumferential spread angle), b: truncated cone member spread angle (spread in radial direction of passage) Angle), c ... spread angle of frustoconical expansion member, α ... flow path Elevation angle, twist angle of β ‥ the flow path.
───────────────────────────────────────────────────── 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） Ｆ２８Ｇ 1/16 Ｂ０８Ｂ 9/04 Ｚ Ｆターム(参考） 3B116 AA13 AB54 BA02 BB22 BB32 BB88 BB90 4F033 QA09 QB02Y QB05 QB12Y QB17 QD16 QE21 QF07Y QH03 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) F28G 1/16 B08B 9/04 Z F term (reference) 3B116 AA13 AB54 BA02 BB22 BB32 BB88 BB90 4F033 QA09 QB02Y QB05 QB12Y QB17 QD16 QE21 QF07Y QH03
Claims (13)
吹き付けてなる管内面処理方法であって、前記管内に噴
射素材を圧送するホースを備えた噴射用ノズルを挿入
し、噴射素材を当該ノズルの前端より管内面に向かって
均一に噴射しつつかかるノズルを前進又は後退させるこ
とを特徴とする管内面処理方法。1. A method for treating an inner surface of a pipe, which comprises spraying an injection material onto an inner surface of a pipe on which scale is attached, wherein a nozzle for injection provided with a hose for feeding the injection material into the pipe is inserted, and the injection material is applied to the nozzle. A method for treating the inner surface of the pipe, wherein the nozzle is advanced or retracted while uniformly injecting from the front end toward the inner surface of the pipe.
１記載の管内面処理方法。2. The pipe inner surface processing method according to claim 1, wherein the main body of the injection material is powdered baking soda.
請求項１記載の管内面処理方法。3. The method for treating the inner surface of a tube according to claim 1, wherein the powdered baking soda has a particle size of 50 to 400 μm.
素材を圧送するホ−ス側金具と螺合される螺合部を形成
し、中空筒体内中央に後端に向かって円錐状絞り部材を
備えるとともに、円錐状絞り部の底部に筒体周方向に等
分の位置に均等にオリフィスを形成し、次いでオリフィ
スに連結した前端に向かうに従って順次拡角とした通路
を形成し、前端に至って筒体内表面全域に通路を広げ、
かつ前端に更に円錐台状拡角部材を備えたノズルであっ
て、被処理管内部にかかるノズルを挿入しこのノズルを
移動しつつノズル前端より噴射素材を噴射し、被処理管
内面へ噴射素材を均一に吹き付けて被処理管内面に付着
したスケールを処理することを特徴とする管内面処理噴
射用ノズル。4. A hollow cylindrical body and a threaded portion at a rear end of the hollow cylindrical body, which is screwed with a hose side metal fitting for sending the injection material under pressure, and are formed in the center of the hollow cylindrical body toward the rear end. A conical throttle member is provided, and orifices are evenly formed at equal positions in the circumferential direction of the cylinder at the bottom of the conical throttle portion, and then passages whose angle is gradually increased toward the front end connected to the orifice are formed. , Spread the passage over the entire inner surface of the cylinder to the front end,
A nozzle having a frustoconical widening member at the front end, the nozzle is inserted into the inside of the pipe to be treated, the jetting material is jetted from the front end of the nozzle while moving this nozzle, and the jetting material to the inner surface of the pipe to be treated. A nozzle for pipe inner surface treatment injection, which sprays uniformly on the inner surface of the pipe to be treated to treat the scale.
もって筒体中心より遠ざかり、筒体の前端の内面に至り
ほぼ内面全周に拡がって形成された請求項４記載の管内
面処理噴射用ノズル。5. The pipe inner surface treatment according to claim 4, wherein the passage is formed so as to be distant from the center of the cylinder at a constant angle (b) toward the front end and to reach the inner surface of the front end of the cylinder and to extend almost all around the inner surface. Injection nozzle.
（ｃ）とした円錐台状拡角部材を備えた請求項４記載の
管内面処理噴射用ノズル。6. The nozzle for pipe inner surface treatment injection according to claim 4, further comprising a truncated cone-shaped widening member having an angle (c) equal to or greater than the angle (b) at the front end of the tubular body.
向の左右に拡角とした請求項４記載の管内面処理噴射用
ノズル。7. The nozzle for pipe inner surface treatment injection according to claim 4, wherein the passages connected to the respective orifices have a widened angle in the lateral direction of the cylindrical body.
左右に約１５度傾斜した請求項４記載の管内面処理噴射
用ノズル。8. The nozzle for pipe inner surface processing injection according to claim 4, wherein the apex angle of the conical throttle member is inclined to the left and right with respect to the central axis by about 15 degrees.
周径以内とする請求項４記載の管内面処理噴射用ノズ
ル。9. The nozzle for pipe inner surface processing injection according to claim 4, wherein the front end of the truncated cone-shaped widening member is substantially within the outer peripheral diameter of the cylindrical body.
た請求項４記載の管内面処理噴射用ノズル。10. The nozzle for pipe inner surface treatment injection according to claim 4, wherein a spacer is provided on the outer surface of the hollow cylindrical body.
柔軟な線状体を起立させた請求項１０記載の管内面処理
噴射用ノズル。11. The nozzle for pipe inner surface treatment injection according to claim 10, wherein the spacer has a large number of flexible linear members standing on the surface of the hollow cylindrical body.
項４乃至１１項いずれか１項記載の管内面処理噴射用ノ
ズル。12. The nozzle for pipe inner surface processing injection according to claim 4, wherein the main body of the injection material is powdered baking soda.
る請求項１２記載の管内面処理噴射用ノズル。13. The nozzle for pipe inner surface treatment injection according to claim 12, wherein the particle size of the powdered baking soda is 50 to 400 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002084196A JP2003245620A (en) | 2001-12-18 | 2002-03-25 | Pipe inner surface treatment method and jet nozzle |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001383842 | 2001-12-18 | ||
| JP2001-383842 | 2001-12-18 | ||
| JP2002084196A JP2003245620A (en) | 2001-12-18 | 2002-03-25 | Pipe inner surface treatment method and jet nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003245620A true JP2003245620A (en) | 2003-09-02 |
Family
ID=28676794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002084196A Withdrawn JP2003245620A (en) | 2001-12-18 | 2002-03-25 | Pipe inner surface treatment method and jet nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003245620A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111633A (en) * | 2016-06-08 | 2016-11-16 | 西可林控制系统(上海)有限公司 | A kind of Full-automatic metal pipe Surface of profile processing method and device structure |
| CN117505415A (en) * | 2024-01-02 | 2024-02-06 | 宝鸡市杰特瑞金属材料股份有限公司 | Titanium tube interior cleaning device and cleaning method |
-
2002
- 2002-03-25 JP JP2002084196A patent/JP2003245620A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111633A (en) * | 2016-06-08 | 2016-11-16 | 西可林控制系统(上海)有限公司 | A kind of Full-automatic metal pipe Surface of profile processing method and device structure |
| CN117505415A (en) * | 2024-01-02 | 2024-02-06 | 宝鸡市杰特瑞金属材料股份有限公司 | Titanium tube interior cleaning device and cleaning method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101889041B1 (en) | Flat jet nozzle, and method of using the flat jet nozzle | |
| CN103619497B (en) | Equipment for handling workpieces | |
| US8187056B2 (en) | Process and apparatus for surface-finishing | |
| US20150129171A1 (en) | Method and apparatus for cleaning surfaces of a finned heat exchanger | |
| JP2001525261A (en) | Injection treatment method for pipe cleaning | |
| US20190314866A1 (en) | Device and Method for Hydrodynamic Surface Cleaning Based on Micro-Hydropercussion Effect | |
| US11040380B2 (en) | Reaction force nozzle | |
| US11052437B2 (en) | Reaction force nozzle | |
| JP5922982B2 (en) | Nozzle for dry ice injection and dry ice injection device | |
| KR20160048404A (en) | Pipe Cleaning Equipment Using Injection Nozzle | |
| KR20140146524A (en) | Pipe cleaning system | |
| US8561918B2 (en) | Nozzle and method for treating an interior of a workpiece | |
| JPS6182861A (en) | Head of high-pressure hose for cleaning pipe | |
| US3358935A (en) | Apparatus for removing caked material from a container | |
| JP4239879B2 (en) | Micro-mist generation method and apparatus | |
| JP5956760B2 (en) | Cleaning nozzle | |
| JP2003245620A (en) | Pipe inner surface treatment method and jet nozzle | |
| JP5335405B2 (en) | Blast nozzle and blasting method | |
| CN100366387C (en) | Device and method for removing material arranged in workpiece | |
| RU2377080C1 (en) | Facility for cleaning internal cavity of pipe line | |
| RU77803U1 (en) | DEVICE FOR CLEANING THE INTERNAL CAVITY OF THE PIPELINE | |
| JP2003181401A (en) | Nozzle for jetting base material for treatment of pipe inside surface | |
| KR101595418B1 (en) | Injection nozzles for dry type cleaning apparatus | |
| JP2007144261A (en) | Cleaning apparatus and method | |
| JPH04219184A (en) | Cleaning device for inner surface of pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20041202 |
|
| RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20060126 |
|
| RD02 | Notification of acceptance of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7422 Effective date: 20060131 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060622 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20060622 |
|
| A761 | Written withdrawal of application |
Free format text: JAPANESE INTERMEDIATE CODE: A761 Effective date: 20070804 |