JPS6362342B2 - - Google Patents
Info
- Publication number
- JPS6362342B2 JPS6362342B2 JP12694584A JP12694584A JPS6362342B2 JP S6362342 B2 JPS6362342 B2 JP S6362342B2 JP 12694584 A JP12694584 A JP 12694584A JP 12694584 A JP12694584 A JP 12694584A JP S6362342 B2 JPS6362342 B2 JP S6362342B2
- Authority
- JP
- Japan
- Prior art keywords
- jet
- fluid
- ultra
- nozzle
- speed
- 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
- 239000000843 powder Substances 0.000 claims description 72
- 239000012530 fluid Substances 0.000 claims description 55
- 238000000034 method Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000005498 polishing Methods 0.000 description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 239000011150 reinforced concrete Substances 0.000 description 12
- 239000011435 rock Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004380 ashing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Description
【発明の詳細な説明】
［発明の分野］
この発明は、岩盤や鉄筋コンクリートなどを切
断する超高速研磨粉流体ジエツトによる切削方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a cutting method using an ultrahigh-speed abrasive powder jet for cutting rock, reinforced concrete, and the like.
ここで、超高速研磨粉流体ジエツトとは、石英
粉末や銅スラグ粉末のような研磨微粉末と、気体
や液体との混合流体からなる超高速ジエツト流を
いう。 Here, the term "ultrahigh-speed polishing powder jet" refers to an ultra-high-speed jet flow consisting of a mixed fluid of polishing fine powder such as quartz powder or copper slag powder, and gas or liquid.
［従来技術とその問題点］
近年、岩盤や鉄筋コンクリートなどを切断する
にあたり、騒音公害の防止を目的として、超高速
研磨粉流体ジエツトによる切削方法を開発するこ
とが強く要望されている。[Prior art and its problems] In recent years, there has been a strong demand for the development of a cutting method using an ultra-high-speed abrasive powder jet for the purpose of preventing noise pollution when cutting rock, reinforced concrete, etc.
一般に、研磨微粉末と気体や液体との混合流体
ジエツトを噴射して被加工材の研磨、切削および
切断を行なおうとする試みはすでに知られてい
る。 In general, attempts are already known to polish, cut, and cut workpieces by injecting a mixed fluid jet of fine abrasive powder and gas or liquid.
第６Ａ図は被加工材の研磨に従来から使用され
ているノズルの一例を示している。同図におい
て、４１は水ジエツトノズルで、この水ジエツト
ノズル４１は高圧ポンプのような高圧水発生装置
４２からの高圧水ａを被加工材４３に噴射するも
のであり、このとき、上記ノズル４１の外周に形
成された同軸の研磨粉供給ノズル４４に、エア供
給装置４５および研磨粉供給装置４６からエアｂ
とともに研磨粉ｃを供給して、高圧水ａでもつて
そのエジエクタ作用によりノズル先端４７から研
磨粉を引き込んで被加工材４３に噴射する。 FIG. 6A shows an example of a nozzle conventionally used for polishing workpieces. In the same figure, 41 is a water jet nozzle, and this water jet nozzle 41 injects high pressure water a from a high pressure water generator 42 such as a high pressure pump onto a workpiece 43. At this time, the outer periphery of the nozzle 41 Air b is supplied from an air supply device 45 and a polishing powder supply device 46 to a coaxial polishing powder supply nozzle 44 formed in
At the same time, polishing powder c is supplied, and high-pressure water a draws the polishing powder from the nozzle tip 47 by its ejector action and injects it onto the workpiece 43.
ところが、このようなジエツトｄでは、第６Ｂ
図の断面で示すように、水ジエツトａと研磨粉ｃ
との混合が十分に行なわれないで、水ジエツトａ
の外周に研磨粉ｃが分散している状態であるか
ら、速度エネルギの最も高い中心部の水ジエツト
ａでもつて研磨粉ｃを被加工材４３に衝突させる
ことができず、被加工材４３の表面における錆落
し程度の働きしかこのジエツトｄは達成できな
い。また、水ジエツトが超高速に向かうにしたが
つて研磨粉ｃによるノズル先端部４７の摩耗が著
じるしく、したがつて、岩盤や鉄筋コンクリート
などの被切断物４３を切断することはとうてい不
可能である。 However, in such a jet d, the 6th B
As shown in the cross section of the figure, water jet a and polishing powder c
water jet a due to insufficient mixing with
Since the abrasive powder c is dispersed around the outer periphery of the workpiece 43, even the water jet a at the center where the velocity energy is highest cannot cause the abrasive powder c to collide with the workpiece 43. This jet d can only serve to remove rust from the surface. Furthermore, as the water jet moves to ultra-high speeds, the nozzle tip 47 is significantly worn down by the abrasive powder c, making it impossible to cut objects 43 such as rock or reinforced concrete. It is.
第７Ａ図は被加工材を切断するために従来から
知られているノズルの他の例を示している。同図
において、５１は水ジエツトノズルで、この水ジ
エツトノズル５１は高圧ポンプのような高圧水発
生装置５２からの高圧水ａを噴射するものであ
る。５３は上記ノズル５１の外周に形成された同
軸の研磨粉供給ノズルで、この研磨粉供給ノズル
５３は研磨粉供給装置５４からの研磨粉ｃをチヤ
ンバ５５に供給して、高圧水ａでもつてそのエジ
エクタ作用によりノズル先端５６から研磨粉ｃを
引き込んで水ジエツトａと研磨粉ｃとの混合を十
分に行なつたのち、水ジエツトａと研磨粉ｃとの
混合流体ｄを混合流体ノズル５７から被加工材５
８に噴射する。 FIG. 7A shows another example of a conventionally known nozzle for cutting workpieces. In the figure, 51 is a water jet nozzle, and this water jet nozzle 51 injects high-pressure water a from a high-pressure water generator 52 such as a high-pressure pump. Reference numeral 53 designates a coaxial polishing powder supply nozzle formed on the outer periphery of the nozzle 51. This polishing powder supply nozzle 53 supplies the polishing powder c from the polishing powder supply device 54 to the chamber 55, and the high-pressure water a also supplies the polishing powder to the chamber 55. After the polishing powder c is drawn in from the nozzle tip 56 by the ejector action and the water jet a and the polishing powder c are sufficiently mixed, a mixed fluid d of the water jet a and the polishing powder c is applied from the mixed fluid nozzle 57. Processed material 5
Inject at 8.
ところが、このようなジエツトｄは、第７Ｂ図
の断面で示すように、水ジエツトａと研磨粉ｃと
の混合が十分に行なわれているため、速度エネル
ギの最も高い中心部の水ジエツトａでもつて研磨
粉ｃを被加工材５８に衝突させることができ、被
加工材５８を切断することが可能であると考えら
れるけれども、実際には、超高速ジエツトｄ内の
研磨粉ｃによるノズル５６の内壁の摩耗が著じる
しく、しかも、水ジエツトａはミキシングチヤン
バ５５内で膨張してエネルギ損失を生じ、それだ
け超高速研磨粉流体ジエツトｄのエネルギ損失が
きわめて大きいため、やはり岩盤や鉄筋コンクリ
ートなどの被切断物４８を切断することはとうて
い不可能である。 However, in such a jet d, as shown in the cross section of Fig. 7B, water jet a and polishing powder c are sufficiently mixed, so even water jet a at the center, where the velocity energy is highest, is Although it is thought that it is possible to make the abrasive powder c collide with the workpiece 58 and cut the workpiece 58, in reality, the nozzle 56 is cut by the abrasive powder c in the ultra-high-speed jet d. The wear of the inner wall is significant, and the water jet a expands in the mixing chamber 55, causing energy loss, and the energy loss of the ultra-high-speed polishing powder jet d is extremely large, so it is also difficult to polish the polishing material, such as rock or reinforced concrete. It is almost impossible to cut the workpiece 48.
［発明の目的］
この発明は上記欠点を解消するためになされた
もので、岩盤や鉄筋コンクリートなどを切断する
ことができ、騒音公害の防止に貢献することがで
きる超高速研磨粉流体ジエツトによる切削方法を
提供することを目的とする。[Object of the Invention] This invention was made to eliminate the above-mentioned drawbacks, and provides a cutting method using an ultra-high-speed abrasive powder jet that can cut rock, reinforced concrete, etc. and contribute to the prevention of noise pollution. The purpose is to provide
［発明の構成と効果］
この発明による超高速研磨粉流体ジエツトによ
る切削方法は、岩盤や鉄筋コンクリートなどの被
切断物に複数のボアホールを所定間隔を存して穿
設するとともに、超高速研磨粉流体ジエツトの噴
射装置を上記ボアホールの軸線に沿つて移動させ
ながら超高速研磨粉流体ジエツトを上記ボアホー
ルの壁面に指し向けて、各ボアホール間の被切断
物を切断するものである。[Configuration and Effects of the Invention] A cutting method using an ultra-high-speed abrasive powder jet according to the present invention involves drilling a plurality of boreholes at predetermined intervals in an object to be cut, such as rock or reinforced concrete, and using an ultra-high-speed abrasive powder jet. The object to be cut between each borehole is cut by directing an ultra-high-speed abrasive powder jet toward the wall surface of the borehole while moving the jet injection device along the axis of the borehole.
上記超高速研磨粉流体ジエツトの噴射装置は、
超高速流体ジエツトを噴射するジエツトノズル
と、このノズルを取り囲んで配置された紡垂形外
筒と、この外筒の内壁に沿いかつこの外筒の軸線
まわりに旋回する低速の旋回流体を発生させる旋
回流体発生手段と、上記外筒内に研磨粉を供給す
る研磨粉供給手段と、上記外筒における旋回流体
と研磨粉との混合流体を上記ジエツトノズルの前
方に導びく混合流体ノズルとを具備し、上記ジエ
ツトノズルの前方における混合流体の中央部に超
高速流体ジエツトを噴射して超高速研磨粉流体ジ
エツトを発生させるように構成されている。 The injection device for the ultra-high-speed polishing powder jet mentioned above is
A jet nozzle that injects an ultra-high-velocity fluid jet, a spindle-shaped outer cylinder disposed surrounding this nozzle, and a swirl that generates a low-speed swirling fluid that swirls along the inner wall of the outer cylinder and around the axis of the outer cylinder. comprising a fluid generating means, an abrasive powder supply means for supplying abrasive powder into the outer cylinder, and a mixed fluid nozzle that guides a mixed fluid of the swirling fluid and the abrasive powder in the outer cylinder to the front of the jet nozzle, The jet nozzle is configured to inject an ultra-high-speed fluid jet into the center of the mixed fluid in front of the jet nozzle to generate an ultra-high-speed polishing powder jet.
このように構成したことにより、超高速流体ジ
エツトと研磨粉との混合が十分に行なわれるた
め、速度エネルギの最も高い中心部の超高速流体
ジエツトでもつて研磨粉をボアホールの壁面に指
し向ければ、たとえその被切断物の断面積が広が
りのあるものでも、各ボアホール間の被切断物を
有効に切断することができるとともに、超高速ジ
エツト内の研磨粉によるノズル内壁の摩耗を生じ
させたり、超高速ジエツトのエネルギ損失を発生
させるおそれがない。 With this configuration, the ultra-high-speed fluid jet and the polishing powder are sufficiently mixed, so that even if the ultra-high-speed fluid jet at the center, where the velocity energy is highest, directs the polishing powder toward the wall of the borehole, Even if the object to be cut has a wide cross-sectional area, it is possible to effectively cut the object between each borehole, and to prevent wear of the inner wall of the nozzle due to abrasive powder in the ultra-high speed jet. There is no risk of high-speed jet energy loss.
さらに、厚い岩盤や鉄筋コンクリート構造物の
解体を騒音、粉塵公害もなく行なうことができ、
しかも原子炉の解体にあたつては、放射能をもつ
粉塵の飛散を防ぎ、安全に地層の処分が可能であ
る。 Furthermore, thick bedrock and reinforced concrete structures can be dismantled without noise or dust pollution.
Moreover, when dismantling a nuclear reactor, it prevents the scattering of radioactive dust and allows safe disposal of the geological formations.
［実施例の説明］
以下、この発明の一実施例を図面にしたがつて
説明する。第１図はこの発明の実施例による超高
速研磨粉流体ジエツトによる切削方法の一例を示
す概略的な断面図である。[Description of Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of a cutting method using an ultrahigh-speed abrasive powder jet according to an embodiment of the present invention.
図において、１は直径約１〜1.8mmの超高速流
体ジエツトａ噴射するジエツトノズル、２はこの
ノズル１を取り囲んで配置された紡垂形外筒、３
はノズルパイプで、ノズルパイプ３には配管１１
を介して高圧流体ポンプのような高圧流体発生装
置８から約800〜1000Kg／cm2の高圧流体が供給さ
れる。４はこの外筒２の先端部に形成されたタン
ガロイ、セラミツクスなどの超硬合金からなる混
合流体ノズルで、この混合流体ノズル４は上記外
筒２の内壁２ａにおける後述する旋回流体ｅと研
磨粉ｃ（第４図参照）との混合流体を上記ジエツ
トノズル１の前方に導びくためのものである。５
は外筒２の基端部の開口を閉塞する閉塞板で、こ
の閉塞板５にはノズルパイプ３が固定され、閉塞
板５の固定位置を軸線方向へ移動させることによ
つて、ジエツトノズル１の設定位置を調整できる
ようになされている。 In the figure, 1 is a jet nozzle that injects an ultra-high-velocity fluid jet a with a diameter of about 1 to 1.8 mm, 2 is a spindle-shaped outer cylinder arranged surrounding this nozzle 1, and 3
is a nozzle pipe, and nozzle pipe 3 has piping 11
A high pressure fluid of about 800 to 1000 kg/cm 2 is supplied from a high pressure fluid generating device 8 such as a high pressure fluid pump via the high pressure fluid pump. Reference numeral 4 denotes a mixed fluid nozzle made of a cemented carbide such as tangaloy or ceramics, which is formed at the tip of the outer cylinder 2. This is for guiding a mixed fluid with c (see FIG. 4) to the front of the jet nozzle 1. 5
is a closing plate that closes the opening at the base end of the outer cylinder 2. The nozzle pipe 3 is fixed to this closing plate 5, and by moving the fixed position of the closing plate 5 in the axial direction, the jet nozzle 1 is closed. The setting position can be adjusted.
６は外筒２の内壁２ａに沿いかつこの外筒２の
軸線まわりに旋回する低速の旋回流体ｅを発生さ
せる流体供給口で、この供給口６は第４図に示す
ように、外筒２の基端部において外筒２の内壁２
ａに沿いかつ内周面の接線方向へ指し向けられて
いる。このため、この供給口６に低速の流体発生
装置９から、たとえば５〜10Kg／cm2程度の圧力を
もつた低速流体ｂを供給すると、この低速流体ｂ
は外筒２の内壁２ａに沿いかつこの外筒２の軸線
まわりに旋回する低速の旋回流体ｅとなる。 Reference numeral 6 denotes a fluid supply port that generates a low-speed swirling fluid e that swirls along the inner wall 2a of the outer cylinder 2 and around the axis of the outer cylinder 2. As shown in FIG. Inner wall 2 of outer cylinder 2 at the base end of
a and is directed in the tangential direction of the inner circumferential surface. Therefore, when a low-speed fluid b having a pressure of, for example, 5 to 10 kg/cm 2 is supplied to this supply port 6 from a low-speed fluid generator 9, this low-speed fluid b
becomes a low-speed swirling fluid e that swirls along the inner wall 2a of the outer cylinder 2 and around the axis of the outer cylinder 2.
７は外筒２の基端部に形成された研磨粉供給口
で、この研磨粉供給口７は研磨粉供給装置１０か
らの研磨粉ｃを外筒２内に供給し、外筒２内にお
いて研磨粉ｃの混合された旋回流体ｅを発生させ
ることができる。 Reference numeral 7 denotes an abrasive powder supply port formed at the base end of the outer cylinder 2. This abrasive powder supply port 7 supplies the abrasive powder c from the abrasive powder supply device 10 into the outer cylinder 2. A swirling fluid e mixed with polishing powder c can be generated.
この旋回流体ｅは第５Ａ図に示すように、外筒
２の内壁２ａに沿つて円周方向へ低速度で旋回す
るから、外筒２を摩耗させることがないばかりで
なく、均質な分布で旋回しながらノズル４に向つ
て搬送され、超高速流体ジエツトａでもつてその
エジエクタ作用により引き込まれる。この引き込
みに際し、混合旋回流体ｅは外筒２の内壁２ａか
ら離れる点ｍ（第５Ｂ図参照）においてその流速
が最大になるけれども、その流速は400ｍ／secの
超高速流体ジエツトａの流速に比較してきわめて
小さく、しかも、研磨粉ｃの単位面積当りにおけ
る粒度分布が少ないから、外筒２の内壁２ａの摩
耗を極力抑制することができる。 As shown in FIG. 5A, this swirling fluid e swirls at a low speed in the circumferential direction along the inner wall 2a of the outer cylinder 2, so that it not only does not wear out the outer cylinder 2, but also has a homogeneous distribution. It is conveyed toward the nozzle 4 while rotating, and even the ultrahigh-speed fluid jet a is drawn in by its ejector action. During this drawing, the flow velocity of the mixed swirling fluid e reaches its maximum at the point m (see Figure 5B) where it leaves the inner wall 2a of the outer cylinder 2; Since the polishing powder c is extremely small and the particle size distribution per unit area of the polishing powder c is small, abrasion of the inner wall 2a of the outer cylinder 2 can be suppressed as much as possible.
混合旋回流体ｅ内の研磨粉ｃを超高速流体ジエ
ツトａにより引き込んで発生した超高速研磨粉流
体ジエツトｄはノズル４内を通過するけれども、
この混合流体ノズル４の内口径Ｄ２は第１図に示
すようにジエツトノズル１の内口径Ｄ１よりも大
径に形成されているから、超高速研磨粉流体ジエ
ツトｄは第５Ｃ図および第５Ｄ図に示すように、
混合流体ノズル４の内壁４ａに接触することがな
い。すなわち、第５Ｃ図に示すように混合流体ノ
ズル４の中央部を超高速研磨粉流体ジエツトｄが
通過するとともに、その外周に研磨粉ｃの余混合
領域が形成され、さらにその外周に流体ｂの領域
が形成されるから、超高速研磨粉流体ジエツトｄ
は混合流体ノズル４の内壁４ａに接触することが
なく、したがつて、超高速研磨粉流体ジエツトｄ
内の研磨粉ｃによつて混合流体ノズル４の内壁４
ａが摩耗するおそれがない。しかも、超高速研磨
粉流体ジエツトｄは混合流体ノズル４の内壁４ａ
に接触することがないから、超高速研磨粉流体ジ
エツトｄのエネルギ損失を防止することができ
る。このように、超高速研磨粉流体ジエツトｄは
第５Ｄ図の断面で示すように、超高速流体ジエツ
トａと研磨粉ｃとの混合が十分に行なわれている
ため、速度エネルギの最も高い中心部の超高速流
体ジエツトａでもつて研磨粉ｃを第１図に示す被
切断物１２に衝突させることができる。 Although the ultra-high-speed abrasive powder jet d generated by drawing the abrasive powder c in the mixed swirling fluid e by the ultra-high-velocity fluid jet a passes through the nozzle 4,
Since the inner diameter D2 of the mixed fluid nozzle 4 is larger than the inner diameter D1 of the jet nozzle 1 as shown in FIG. As shown,
There is no contact with the inner wall 4a of the mixed fluid nozzle 4. That is, as shown in FIG. 5C, as the ultra-high-speed polishing powder jet d passes through the center of the mixed fluid nozzle 4, a mixing region of the polishing powder c is formed around the outer periphery, and furthermore, the fluid b is mixed around the outer periphery. Since the area is formed, ultra-high speed polishing powder jet d
does not come into contact with the inner wall 4a of the mixed fluid nozzle 4, and therefore the ultra-high speed polishing powder jet d
The inner wall 4 of the mixed fluid nozzle 4 is damaged by the polishing powder c inside.
There is no risk that a will wear out. Moreover, the ultra-high speed polishing powder jet d is applied to the inner wall 4a of the mixed fluid nozzle 4.
Since there is no contact with the ultra-high speed polishing powder jet d, energy loss can be prevented. In this way, as shown in the cross section of Fig. 5D, the ultra-high-speed polishing powder jet d has a sufficient mixing of the ultra-high-velocity fluid jet a and the polishing powder c, so that the ultra-high-speed polishing powder jet d is concentrated at the center where the velocity energy is highest. It is possible to make the abrasive powder c collide with the workpiece 12 shown in FIG.
いま、第３図に示す鉄筋コンクリート１２の解
体にあたつて、まず、鉄筋コンクリート１２の壁
面に垂直方向へ、直径約160mmの複数のボアホー
ル１４をその中心軸の間隔800〜900mmでもつて碁
盤目状に穿設するとともに、上述した超高速研磨
粉流体ジエツトの噴射装置Ｍを上記ボアホール１
４の軸線に沿つて、第２図に示すガイド部材１３
を介して移動させながら超高速研磨粉流体ジエツ
トｄを上記ボアホール１４の壁面１４ａに指し向
ければ、第３図に示す各ボアホール１４で囲まれ
た斜線領域Ｎの鉄筋コンクリート１２を切断する
ことができる。 Now, when dismantling the reinforced concrete 12 shown in Fig. 3, first, a plurality of boreholes 14 with a diameter of about 160 mm are formed in a grid pattern in the vertical direction on the wall surface of the reinforced concrete 12, with an interval of 800 to 900 mm between their center axes. At the same time, the above-mentioned ultra-high-speed polishing powder jet injection device M is inserted into the borehole 1.
4 along the axis of the guide member 13 shown in FIG.
By directing the ultra-high speed abrasive powder jet d toward the wall surface 14a of the borehole 14 while moving it through the boreholes 14, the reinforced concrete 12 in the shaded area N surrounded by each borehole 14 shown in FIG. 3 can be cut.
さらに、厚い鉄筋コンクリート構造物の解体を
騒音、粉塵公害もなく行なうことができ、しかも
原子炉の解体にあたつては、放射能をもつ粉塵の
飛散を防ぎ、安全に地層の処分が可能である。 Furthermore, thick reinforced concrete structures can be dismantled without noise or dust pollution, and when dismantling a nuclear reactor, radioactive dust can be prevented from scattering, making it possible to safely dispose of geological formations. .
なお、上記実施例において、超高速流体ジエツ
トａは従来例と同様に水ジエツトないしは油ジエ
ツトのような液体ジエツトであつても、あるいは
エアジエツトのような気体ジエツトであつてもよ
いが、被切断材１２が発火性もしくは爆発性の材
料である場合には、ヘリウムガスやちつ素ガスの
ような不活性ガスジエツトａを使用することが推
奨される。 In the above embodiment, the ultrahigh-velocity fluid jet a may be a liquid jet such as a water jet or an oil jet as in the conventional example, or a gas jet such as an air jet. If 12 is a flammable or explosive material, it is recommended to use an inert gas jet a, such as helium gas or nitrogen gas.
また、旋回流体ｅはエアのような気体であつて
も、水のような液体であつてもよいことはいうま
でもない。 Further, it goes without saying that the swirling fluid e may be a gas such as air or a liquid such as water.
第１図はこの発明による超高速研磨粉流体ジエ
ツトによる切削方法の一例を示す概略的な断面
図、第２図は第１図の下面図、第３図は鉄筋コン
クリート構造物の解体方法を説明するための平面
図、第４図は第１図のＡ−Ａ線に沿う概略的な断
面図、第５Ａ図は第１図の作動を説明するための
概略的な断面図、第５Ｂ図は第５Ａ図の要部の拡
大断面図、第５Ｃ図は第５Ｂ図のＢ−Ｂ線に沿う
断面図、第５Ｄ図は第５Ｂ図のＣ−Ｃ線に沿う断
面図、第６Ａ図は従来例の一例を示す概略的な断
面図、第６Ｂ図は第６Ａ図の作動を説明するため
の断面図、第７Ａ図は従来例の他の例を示す概略
的な断面図、第７Ｂ図は第７Ａ図の作動を説明す
るための断面図である。
１……ジエツトノズル、２……紡垂形外筒、４
……混合流体ノズル、９……旋回流体発生手段、
１０……研磨粉供給手段、ａ……超高速流体ジエ
ツト、ｃ……研磨粉、ｄ……超高速研磨粉流体ジ
エツト、ｅ……旋回流体、１２……被切断物、１
４……ボアホール。
Fig. 1 is a schematic cross-sectional view showing an example of a cutting method using the ultra-high-speed abrasive powder jet according to the present invention, Fig. 2 is a bottom view of Fig. 1, and Fig. 3 explains a method for dismantling a reinforced concrete structure. FIG. 4 is a schematic sectional view taken along line A-A in FIG. 1, FIG. 5A is a schematic sectional view for explaining the operation of FIG. 5A is an enlarged sectional view of the main part, FIG. 5C is a sectional view taken along line BB in FIG. 5B, FIG. 5D is a sectional view taken along line C-C in FIG. 5B, and FIG. 6A is a conventional example. 6B is a sectional view for explaining the operation of FIG. 6A, FIG. 7A is a schematic sectional view showing another example of the conventional example, and FIG. 7B is a sectional view for explaining the operation of FIG. 6A. FIG. 7A is a sectional view for explaining the operation of FIG. 7A. 1... Jet nozzle, 2... Spindle-shaped outer cylinder, 4
... mixed fluid nozzle, 9 ... swirling fluid generating means,
10... Polishing powder supply means, a... Ultra high speed fluid jet, c... Polishing powder, d... Ultra high speed polishing powder jet, e... Rotating fluid, 12... Object to be cut, 1
4...Borehole.
Claims (1)
ルと、このノズルを取り囲んで配置された紡垂形
外筒と、この外筒の内壁に沿いかつこの外筒の軸
線まわりに旋回する低速の旋回流体を発生させる
旋回流体発生手段と、上記外筒内に研磨粉を供給
する研磨粉供給手段と、上記外筒における旋回流
体と研磨粉との混合流体を上記ジエツトノズルの
前方に導びく混合流体ノズルとを具備してなる超
高速研磨粉流体ジエツトの噴射装置を構成し、被
切断物に複数のボアホールを所定間隔を存して穿
設するとともに、上記噴射装置を上記ボアホール
の軸線に沿つて移動させながら、上記ジエツトノ
ズルの前方における混合流体の中央部に超高速流
体ジエツトを噴射して発生された超高速研磨粉流
体ジエツトを上記ボアホールの壁面に指し向け
て、各ボアホール間の被切断物を切断することを
特徴とする超高速研磨粉流体ジエツトによる切削
方法。1. A jet nozzle that injects an ultra-high-velocity fluid jet, a spindle-shaped outer cylinder that surrounds this nozzle, and generates a low-speed swirling fluid that swirls along the inner wall of this outer cylinder and around the axis of this outer cylinder. A swirling fluid generating means, an abrasive powder supply means for supplying abrasive powder into the outer cylinder, and a mixed fluid nozzle that guides a mixed fluid of the swirling fluid and the abrasive powder in the outer cylinder to the front of the jet nozzle. An ultra-high-speed abrasive powder jet injection device is constructed, which drills a plurality of boreholes at predetermined intervals in the object to be cut, and while moving the injection device along the axis of the borehole, An ultra-high-speed abrasive powder jet generated by injecting an ultra-high-speed fluid jet into the center of the mixed fluid in front of the jet nozzle is directed toward the wall surface of the borehole to cut the workpiece between each borehole. A cutting method using an ultra-high-speed abrasive powder jet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12694584A JPS614670A (en) | 1984-06-20 | 1984-06-20 | Cutting method by superhigh-speed abrasive powder fluid jet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12694584A JPS614670A (en) | 1984-06-20 | 1984-06-20 | Cutting method by superhigh-speed abrasive powder fluid jet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS614670A JPS614670A (en) | 1986-01-10 |
| JPS6362342B2 true JPS6362342B2 (en) | 1988-12-02 |
Family
ID=14947779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12694584A Granted JPS614670A (en) | 1984-06-20 | 1984-06-20 | Cutting method by superhigh-speed abrasive powder fluid jet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS614670A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6263100A (en) * | 1985-09-10 | 1987-03-19 | 大成建設株式会社 | Method of water-jet cutting construction |
| JPS6274600A (en) * | 1985-09-30 | 1987-04-06 | 大成建設株式会社 | Cutting device using abrasive jet |
| JPS62164967A (en) * | 1986-01-11 | 1987-07-21 | 株式会社 間組 | Partial disassembling of shield concrete in nuclear reactor |
| JPS62164966A (en) * | 1986-01-11 | 1987-07-21 | 株式会社 間組 | Partial disassembling of shield concrete in nuclear reactor |
| JPS62167000A (en) * | 1986-01-21 | 1987-07-23 | フジタ工業株式会社 | Method and device for cutting reinforced concrete |
| JPS6313697U (en) * | 1986-07-15 | 1988-01-29 | ||
| WO1992011116A1 (en) * | 1990-12-17 | 1992-07-09 | Tadeusz Stec | Method of cutting amorphous materials using liquid |
| US6244927B1 (en) | 1998-08-31 | 2001-06-12 | Ingersoll-Rand Company | Multi-functional sensing methods and apparatus therefor |
| JP4870438B2 (en) * | 2006-01-13 | 2012-02-08 | 株式会社ディスコ | Laser jet processing equipment |
| JP6394022B2 (en) * | 2014-03-20 | 2018-09-26 | 新日鐵住金株式会社 | Equipment foundation repair method |
| CN107108264B (en) | 2014-10-30 | 2019-06-04 | 住友金属矿山株式会社 | Nickel-containing composite hydroxide, method for producing the same, positive electrode active material for non-aqueous electrolyte secondary battery, method for producing the same, and non-aqueous electrolyte secondary battery |
-
1984
- 1984-06-20 JP JP12694584A patent/JPS614670A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS614670A (en) | 1986-01-10 |
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