JP5807783B2 - Fine bubble generator and swirl flow forming body - Google Patents

Fine bubble generator and swirl flow forming body Download PDF

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JP5807783B2
JP5807783B2 JP2012009344A JP2012009344A JP5807783B2 JP 5807783 B2 JP5807783 B2 JP 5807783B2 JP 2012009344 A JP2012009344 A JP 2012009344A JP 2012009344 A JP2012009344 A JP 2012009344A JP 5807783 B2 JP5807783 B2 JP 5807783B2
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forming body
outer peripheral
flow forming
gas
swirl flow
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JP2013146688A (en
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秀一 嵯峨
秀一 嵯峨
浅里　信之
信之 浅里
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Nitta Corp
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Nitta Corp
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Priority to JP2012009344A priority Critical patent/JP5807783B2/en
Priority to CN201280065912.6A priority patent/CN104023833B/en
Priority to PCT/JP2012/083325 priority patent/WO2013108550A1/en
Priority to KR1020147007190A priority patent/KR102132319B1/en
Priority to TW101150435A priority patent/TWI583440B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
    • B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2373—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media for obtaining fine bubbles, i.e. bubbles with a size below 100 µm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31241—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the circumferential area of the venturi, creating an aspiration in the central part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3125—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characteristics of the Venturi parts
    • B01F25/31251—Throats
    • B01F25/312512—Profiled, grooved, ribbed throat, or being provided with baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/913—Vortex flow, i.e. flow spiraling in a tangential direction and moving in an axial direction

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)

Description

本発明は、旋回流を利用して気液混合を行い液中に微細気泡を発生させる微細気泡発生装置に関する。   The present invention relates to a fine bubble generator that performs gas-liquid mixing using a swirl flow to generate fine bubbles in a liquid.

マイクロバブルなどの微細気泡を液中に発生させる方式として気液二相高速旋回方式が知られている。気液二相高速旋回方式では、ノズル内の円筒面に沿って液体を高速旋回させてノズル中心（軸心に沿って）に負圧を発生させる。そして、この負圧によりノズル内に気体を導入し高速旋回する気液二相旋回流を形成する。この旋回流を軸心に沿って縮流し、ノズル出口から開放することにより気液二相流体をせん断し微細気泡を発生させる（例えば特許文献１参照）。   A gas-liquid two-phase high-speed swirling method is known as a method for generating fine bubbles such as microbubbles in a liquid. In the gas-liquid two-phase high-speed swirling method, the liquid is swung at high speed along the cylindrical surface in the nozzle to generate a negative pressure at the center of the nozzle (along the axis). Then, gas is introduced into the nozzle by this negative pressure to form a gas-liquid two-phase swirl flow that swirls at high speed. The swirling flow is contracted along the axis and released from the nozzle outlet to shear the gas-liquid two-phase fluid to generate fine bubbles (see, for example, Patent Document 1).

特許文献１の微細気泡発生装置では、高圧の液体を、螺旋状液体導入路を通してノズル内の気液混合空間に導き、これにより気液混合空間の円筒内周面に沿う螺旋状の高速旋回流を形成する。螺旋状液体導入路は、外周に螺旋状羽根が設けられた円柱状の中央固体部をノズル本体の円筒部に嵌め合わせることで形成される。   In the fine bubble generating device of Patent Document 1, high-pressure liquid is guided to a gas-liquid mixing space in a nozzle through a spiral liquid introduction path, whereby a spiral high-speed swirling flow along a cylindrical inner peripheral surface of the gas-liquid mixing space. Form. The spiral liquid introduction path is formed by fitting a cylindrical central solid portion having a spiral blade provided on the outer periphery thereof to the cylindrical portion of the nozzle body.

液体は中央固体部上方に設けられる液体導入路を通して螺旋状液体導入路へと導かれる。一方、気体は中央固体部の中心軸に沿って形成された通気孔に接続されたパイプを通して供給されるためパイプは液体導入路内に配置される。液体導入路と気体導入路は分離される必要があるが、これはパイプの組み付け等の問題から、パイプを直進させて液体導入路を略直角に曲げることで達成される。   The liquid is guided to the spiral liquid introduction path through the liquid introduction path provided above the central solid portion. On the other hand, since the gas is supplied through a pipe connected to a vent hole formed along the central axis of the central solid portion, the pipe is disposed in the liquid introduction path. The liquid introduction path and the gas introduction path need to be separated, but this is achieved by bending the liquid introduction path at a substantially right angle by moving the pipe straight because of problems such as assembly of the pipe.

特開２００８−１１４２０５号公報JP 2008-114205 A

しかし、特許文献１の構成では、液体導入路が略直角に曲がっているため、この部分で圧力損失が発生し高圧での液体供給に不利である。また、直進するパイプが液体導入路の壁面を通り抜ける部分に高圧液体の液漏れを防止するシール構造を設ける必要があり、そのための加工や部品が必要となる。更に、液体導入路が屈曲していると液体導入路を通して中央固体部を組み付けできないので、ノズル本体を中央固体部が嵌装される先端部と、屈曲した液体導入路が形成される基端部に分離する必要がある。   However, in the configuration of Patent Document 1, since the liquid introduction path is bent at a substantially right angle, pressure loss occurs in this portion, which is disadvantageous for liquid supply at high pressure. In addition, it is necessary to provide a seal structure for preventing leakage of high-pressure liquid in a portion where the straight pipe passes through the wall surface of the liquid introduction path, and processing and parts for that are required. Furthermore, since the central solid part cannot be assembled through the liquid introduction path if the liquid introduction path is bent, the nozzle body has a distal end part where the central solid part is fitted and a base end part where the bent liquid introduction path is formed. Need to be separated.

本発明は、液体の圧力損失が低減されるとともに部品点数が少ない気液二相高速旋回方式を用いた微細気泡発生装置を提供することを課題としている。   An object of the present invention is to provide a fine bubble generating apparatus using a gas-liquid two-phase high-speed swirling method with reduced liquid pressure loss and a small number of parts.

本発明の旋回通路形成体は、螺旋通路を通して加圧された液体をノズル内の気液混合空間に供給し旋回流を発生させ、旋回流により発生する負圧を用いて気体を気液混合空間に導き入れることで気液二相旋回流を形成し、気液二相旋回流をノズルから噴出することにより気液二相流体をせん断し微細気泡を発生する微細気泡発生装置に装着される旋回通路形成体であって、円筒部を有する本体と、円筒部と同軸的な円筒内周面を有する外周部と、本体と外周部の間に形成される螺旋スロープと、螺旋スロープの始端部において円筒部と外周部の間を連絡する肉厚部と、円筒部の中心軸に沿って形成される第１気体通路と、肉厚部内を通って第１気体通路を外周部の外側へと連絡する第２気体通路とを備えたことを特徴としている。   The swirling passage forming body of the present invention supplies a liquid pressurized through a spiral passage to the gas-liquid mixing space in the nozzle to generate a swirling flow, and uses the negative pressure generated by the swirling flow to supply gas to the gas-liquid mixing space. The gas-liquid two-phase swirl flow is formed by introducing the gas-liquid two-phase swirl flow from the nozzle, and the gas-liquid two-phase fluid is sheared to generate fine bubbles. A passage forming body, a main body having a cylindrical portion, an outer peripheral portion having a cylindrical inner peripheral surface coaxial with the cylindrical portion, a spiral slope formed between the main body and the outer peripheral portion, and a starting end portion of the spiral slope A thick part communicating between the cylindrical part and the outer peripheral part, a first gas passage formed along the central axis of the cylindrical part, and the first gas passage passing through the thick part to the outside of the outer peripheral part And a second gas passage.

外周部は円筒状の外周面を有することが好ましく、外周面の周方向に沿って一対の円環状突起部が形成され、第２気体通路の開口部が一対の円環状突起部の間に形成されることが好ましい。安定した旋回流を形成するには螺旋スロープは複数設けられることが好ましく、射出成形上の観点からは、複数の螺旋スロープ同士が中心軸方向に重ならないことが好ましい。また外周部の円筒内周面における螺旋スロープの始端部が軸方向にまで立ち上げられ、この始端部に対応する位置に、例えば円筒軸に沿って延在するチューブ位置決めのための梁部が形成される。   The outer peripheral portion preferably has a cylindrical outer peripheral surface, a pair of annular protrusions are formed along the circumferential direction of the outer peripheral surface, and an opening of the second gas passage is formed between the pair of annular protrusions. It is preferred that In order to form a stable swirl flow, it is preferable to provide a plurality of spiral slopes. From the viewpoint of injection molding, it is preferable that the plurality of spiral slopes do not overlap in the central axis direction. Also, the starting end of the spiral slope on the outer peripheral cylindrical inner surface is raised up to the axial direction, and a beam portion for positioning the tube extending along the cylindrical axis, for example, is formed at a position corresponding to the starting end. Is done.

本発明の微細気泡発生装置は、上記旋回流形成体が装着される微細気泡発生装置であって、旋回流形成体が嵌挿される旋回流形成体収容空間に横穴が設けられ、旋回流形成体装着時、横穴が第２気体通路へと接続されることを特徴としている。   The fine bubble generating device of the present invention is a fine bubble generating device to which the swirl flow forming body is mounted, wherein a lateral hole is provided in a swirl flow forming body accommodating space into which the swirl flow forming body is inserted, and the swirl flow forming body is provided. At the time of mounting, the lateral hole is connected to the second gas passage.

旋回流形成体の外周部は円筒状の外周面を有することが好ましく、外周面の周方向に沿って一対の円環状突起部が形成され、第２気体通路の開口部が一対の円環状突起部の間に形成され、横穴が一対の円環状突起部の間に配置されることが好ましい。これにより、環状突起部の間に気体通路を形成し、旋回流形成体の回転方向の位置と横穴の位置を任意に設定することが可能となる。また、一対の円環状突起部に挟まれて形成される環状空間の外側に円環状突起部に隣接してＯリングがそれぞれ配置される。   The outer peripheral portion of the swirl flow forming body preferably has a cylindrical outer peripheral surface, a pair of annular projections are formed along the circumferential direction of the outer peripheral surface, and the opening of the second gas passage is a pair of annular projections Preferably, the horizontal hole is formed between the pair of annular projections. As a result, a gas passage is formed between the annular protrusions, and the position of the swirling flow forming body in the rotational direction and the position of the lateral hole can be arbitrarily set. Further, O-rings are respectively disposed adjacent to the annular projections outside the annular space formed by being sandwiched between the pair of annular projections.

本発明によれば、液体の圧力損失が低減されるとともに部品点数が少ない気液二相高速旋回方式を用いた微細気泡発生装置を提供することができる。   According to the present invention, it is possible to provide a fine bubble generating device using a gas-liquid two-phase high-speed swirling method with reduced liquid pressure loss and a small number of parts.

本実施形態の微細気泡発生装置の部分断面図である。It is a fragmentary sectional view of the fine bubble generator of this embodiment. 本実施形態の旋回流形成体の側面図である。It is a side view of the swirl flow formation body of this embodiment. 旋回流形成体の平面図である。It is a top view of a swirl flow formation body. 図３のＩＶ−ＩＶ線に沿った旋回流形成体の断面図である。FIG. 4 is a cross-sectional view of a swirl flow forming body taken along line IV-IV in FIG. 3. 図３のＶ−Ｖ線に沿った旋回流形成体の部分断面図である。It is a fragmentary sectional view of the swirl flow formation body along the VV line of FIG. 図３のＶＩ−ＶＩ線に沿った旋回流形成体の断面図である。It is sectional drawing of the swirl | vortex flow formation body along the VI-VI line of FIG.

以下、本発明の実施の形態を、図面を参照して説明する。図１は、本発明の一実施形態である微細気泡発生装置の構成を示す部分断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partial cross-sectional view showing a configuration of a fine bubble generating apparatus according to an embodiment of the present invention.

微細気泡発生装置１０の本体１１には、例えば図１のＸ１軸に沿って縦通する穴１２が設けられる。穴１２には例えばＸ１軸に直交するＹ軸に沿って本体１１の外部へと連通する横穴１３が設けられる。また、横穴１３には例えばＹ軸に直交するＸ２軸に沿って本体１１の外部へと連通する穴１４が設けられる。なお、本実施形態においてＸ１、Ｘ２軸は平行に配置されるがこれに限定されるものではなく、Ｘ１、Ｘ２軸は捩れの関係にあってもよい。   The main body 11 of the microbubble generator 10 is provided with, for example, a hole 12 that passes vertically along the X1 axis of FIG. The hole 12 is provided with a lateral hole 13 communicating with the outside of the main body 11 along the Y axis orthogonal to the X1 axis, for example. The horizontal hole 13 is provided with a hole 14 that communicates with the outside of the main body 11 along the X2 axis orthogonal to the Y axis. In this embodiment, the X1 and X2 axes are arranged in parallel, but the present invention is not limited to this, and the X1 and X2 axes may be in a twisted relationship.

穴１２の一方の端部（図１の左側）は、微細気泡発生装置１０のノズル１５の気液混合空間１６を構成する。気液混合空間１６は例えば円筒空間として構成され、その先端開口部は一度縮径された後、拡径される形状を呈する。気液混合空間１６内には、後述するようにその内周面に沿って高圧の液体が噴出され、液体は高速で旋回しながらノズル先端へと向かう。気液混合空間１６の中心には、この高速旋回流によってＸ１軸に沿った負圧が発生し、この負圧により誘導される気体が気液混合空間１６に供給され、気液二相旋回流が形成される。気液二相旋回流はノズル１５の先端から噴出され、その際気液二相流体がせん断されて微細気泡が発生する。   One end of the hole 12 (left side in FIG. 1) forms a gas-liquid mixing space 16 of the nozzle 15 of the fine bubble generating device 10. The gas-liquid mixing space 16 is configured as, for example, a cylindrical space, and the tip opening has a shape that is once reduced in diameter and then expanded in diameter. As will be described later, a high-pressure liquid is jetted into the gas-liquid mixing space 16 along its inner peripheral surface, and the liquid moves toward the nozzle tip while swirling at a high speed. A negative pressure along the X1 axis is generated by the high-speed swirling flow at the center of the gas-liquid mixing space 16, and a gas induced by the negative pressure is supplied to the gas-liquid mixing space 16, and the gas-liquid two-phase swirling flow Is formed. The gas-liquid two-phase swirl flow is ejected from the tip of the nozzle 15, and the gas-liquid two-phase fluid is sheared and fine bubbles are generated.

一方、穴１２の他端（ノズル１５とは反対側）には液体供給部１７が設けられる。液体供給部１７は上述した液体を外部から穴１２内に供給する部分である。本実施形態で液体は例えば可撓チューブ（不図示）を用いて供給され、液体供給部１７には例えばプッシュイン継手などのチューブ継手が採用される。なお、液体はパイプを通して供給されてもよく、継手には目的や使用条件に応じて従来周知の様々な流体継手を使用できる。   On the other hand, a liquid supply unit 17 is provided at the other end of the hole 12 (on the side opposite to the nozzle 15). The liquid supply part 17 is a part for supplying the liquid described above into the hole 12 from the outside. In the present embodiment, the liquid is supplied using, for example, a flexible tube (not shown), and a tube joint such as a push-in joint is used for the liquid supply unit 17. The liquid may be supplied through a pipe, and various well-known fluid couplings can be used for the coupling depending on the purpose and use conditions.

穴１２においてノズル１５と液体供給部１７の間には、旋回流形成体１８を収容するための例えば円筒形の旋回流形成体収容空間１９が設けられる。旋回流形成体収容空間１９の内径は気液混合空間１６の内径よりも大きく、両空間は円錐台形を呈する円錐台形空間２０によって接続される。   In the hole 12, for example, a cylindrical swirl flow forming body accommodation space 19 for accommodating the swirl flow forming body 18 is provided between the nozzle 15 and the liquid supply unit 17. The inner diameter of the swirl flow forming body accommodating space 19 is larger than the inner diameter of the gas-liquid mixing space 16, and both spaces are connected by a truncated cone space 20 having a truncated cone shape.

旋回流形成体１８は、液体供給部１７から供給される高圧液体を気液混合空間１６の内周に沿って噴出にするとともに、気体を気液混合空間１６の中心へと導くための部材であり、中央に配置される本体１８０と、その周囲を取り囲む例えば略円筒形の外周部１８１を備える。本体１８０は、円筒部１８２と同軸的に延出する切頭円錐台形状の台形部１８３とから構成される。すなわち旋回流形成体１８が旋回流形成体収容空間１９に配置されると、台形部１８３は、円錐台形空間２０内に延出され、台形部１８３の外周面と円錐台形空間２０の内周面の間には隙間が形成される。   The swirl flow forming body 18 is a member for ejecting the high-pressure liquid supplied from the liquid supply unit 17 along the inner periphery of the gas-liquid mixing space 16 and guiding the gas to the center of the gas-liquid mixing space 16. And a main body 180 disposed in the center, and an outer peripheral portion 181 having, for example, a substantially cylindrical shape surrounding the periphery. The main body 180 is composed of a truncated cone-shaped trapezoidal part 183 that extends coaxially with the cylindrical part 182. That is, when the swirl flow forming body 18 is disposed in the swirl flow forming body accommodation space 19, the trapezoidal portion 183 extends into the frustoconical space 20, and the outer peripheral surface of the trapezoidal portion 183 and the inner peripheral surface of the frustoconical space 20. A gap is formed between them.

旋回流形成体収容空間１９の内径は、円錐台形空間２０の台形底面の内径よりも大きく、両空間１９、２０の接続部には段部２１が形成される。すなわち組立ての際、旋回流形成体１８が液体供給部１７側から穴１２内に嵌挿されるとき、旋回流形成体１８が適正な位置に達すると外周部１８１の先端が段部２１に当接し、旋回流形成体１８のＸ１軸方向への移動が規制される。その後、液体供給部１７に流体継手が組み付けられると、外周部１８１の他端に流体継手の部品（例えばバックリング）が当接される。すなわち、旋回流形成体１８は、段部２１と液体供給部１７の間に挟まれ、そのＸ１軸方向の位置が固定される。   The inner diameter of the swirl flow forming body accommodating space 19 is larger than the inner diameter of the trapezoidal bottom surface of the frustoconical space 20, and a stepped portion 21 is formed at the connecting portion of both the spaces 19 and 20. That is, when the swirling flow forming body 18 is inserted into the hole 12 from the liquid supply unit 17 side during assembly, the tip of the outer peripheral portion 181 comes into contact with the stepped portion 21 when the swirling flow forming body 18 reaches an appropriate position. The movement of the swirl flow forming body 18 in the X1 axis direction is restricted. Thereafter, when the fluid coupling is assembled to the liquid supply unit 17, a fluid coupling component (for example, a buckling) is brought into contact with the other end of the outer peripheral portion 181. That is, the swirl flow forming body 18 is sandwiched between the stepped portion 21 and the liquid supply portion 17, and the position in the X1-axis direction is fixed.

外周部１８１の外周面には、周方向に沿って延在する突起部１８４、１８５が一対設けられる。突起部１８４、１８５における外径は、旋回流形成体収容空間１９の内径に略等しく設定される。すなわち、外周部１８１と旋回流形成体収容空間１９の内周面の間には、突起１８４、１８５によって挟まれる円環状の空間２２が形成される。また、突起１８４、１８５の外側（円環状空間２２の外側）には、それぞれの突起に密接してＯリング２５、２６が配置され、円環状空間２２が気密的に維持される。なお、Ｏリング２５、２６の位置ズレを防止するために、Ｏリングが配置される位置の外周面を溝状に形成してもよい。   A pair of protrusions 184 and 185 extending along the circumferential direction are provided on the outer peripheral surface of the outer peripheral portion 181. The outer diameters of the protrusions 184 and 185 are set substantially equal to the inner diameter of the swirl flow forming body accommodation space 19. That is, an annular space 22 sandwiched between the protrusions 184 and 185 is formed between the outer peripheral portion 181 and the inner peripheral surface of the swirl flow forming body accommodation space 19. Further, outside the protrusions 184 and 185 (outside the annular space 22), O-rings 25 and 26 are arranged in close contact with the respective protrusions, so that the annular space 22 is maintained airtight. In order to prevent displacement of the O-rings 25 and 26, the outer peripheral surface at the position where the O-ring is disposed may be formed in a groove shape.

横穴１３は、この円環状空間２２に対応する位置に形成され、円環状空間２２は横穴１３とともに気体通路を構成する。横穴１３には供給される気体の流量を制御するため、例えばニードルスクリュウ２７などを用いた流量調整機構２３が設けられる。また本実施形態では、Ｘ２軸に沿った穴１４に気体供給部２４が設けられる。気体供給部２４にも例えばプッシュイン継手などの流体継手が設けられ、可撓チューブ（不図示）が接続されて気体が微細気泡発生装置１０へ供給される。すなわち、穴１４、横穴１３を通して円環状空間２２に気体の供給が可能であり、ニードルスクリュウの位置を調整することで流路面積が制御され気体の流量が調整される。   The lateral hole 13 is formed at a position corresponding to the annular space 22, and the annular space 22 constitutes a gas passage together with the lateral hole 13. The horizontal hole 13 is provided with a flow rate adjusting mechanism 23 using, for example, a needle screw 27 in order to control the flow rate of the supplied gas. Moreover, in this embodiment, the gas supply part 24 is provided in the hole 14 along the X2 axis. The gas supply unit 24 is also provided with a fluid coupling such as a push-in coupling, for example, and a flexible tube (not shown) is connected to supply gas to the fine bubble generating device 10. That is, gas can be supplied to the annular space 22 through the hole 14 and the horizontal hole 13, and the flow area is controlled by adjusting the position of the needle screw to adjust the gas flow rate.

旋回流形成体１８には、後で詳述するように突起１８４、１８５の間の外周面から台形部１８３の頂面中央部までを連通する気体通路が設けられる。すなわち、気液混合空間１６は、台形部１８３の頂面中央に設けられた気体通路を通して円環状空間２２へと連通され、円環状空間２２は、横穴１３、穴１４を介して気体供給部２４へと連通される。   The swirl flow forming body 18 is provided with a gas passage that communicates from the outer peripheral surface between the protrusions 184 and 185 to the center of the top surface of the trapezoidal portion 183 as will be described in detail later. That is, the gas-liquid mixing space 16 communicates with the annular space 22 through a gas passage provided in the center of the top surface of the trapezoidal portion 183, and the annular space 22 is connected to the gas supply portion 24 through the lateral hole 13 and the hole 14. Communicated to

次に、図２〜図５を参照して本実施形態の旋回流形成体１８のより詳細な構造について説明する。図２は、旋回流形成体１８の測面図であり、図３は図２のIII方向からの平面図である。また、図４は図３のIV−IV線に沿った断面図であり、図５、図６は、図４のＶ方向、VI方向からの本体１８０の矢視図である。なお、図５、６において外周部１８１は断面図で示される。   Next, a more detailed structure of the swirl flow forming body 18 of the present embodiment will be described with reference to FIGS. FIG. 2 is a plan view of the swirl flow forming body 18, and FIG. 3 is a plan view from the III direction of FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, and FIGS. 5 and 6 are arrow views of the main body 180 from the V direction and the VI direction in FIG. 5 and 6, the outer peripheral portion 181 is shown in a sectional view.

図３〜図６に示されるように、旋回流形成体１８の円筒部１８２と外周部１８１の間には、複数の螺旋スロープが設けられ、円筒部１８２と外周部１８１は螺旋スロープによって連絡される。本実施形態では一対の螺旋スロープ１８６、１８７が設けられ、螺旋スロープ１８６、１８７は、例えばそれぞれ円筒部１８２の周り略１８０°に亘り、５°〜４５°の傾斜角で設けられる。液体供給部１７から供給される高圧液体は、外周部１８１の内側を通って、この螺旋スロープ１８６、１８７にまで達し、螺旋スロープ１８６、１８７に沿って円錐台形空間２０へと噴出される。なお螺旋スロープ１８６、１８７の始端部（上流側）１８６Ａ、１８７Ａは略軸方向にまで立ち上げられている。   As shown in FIGS. 3 to 6, a plurality of spiral slopes are provided between the cylindrical portion 182 and the outer peripheral portion 181 of the swirling flow forming body 18, and the cylindrical portion 182 and the outer peripheral portion 181 are connected by the spiral slope. The In this embodiment, a pair of spiral slopes 186 and 187 are provided, and the spiral slopes 186 and 187 are provided at an inclination angle of 5 ° to 45 °, for example, approximately 180 ° around the cylindrical portion 182. The high-pressure liquid supplied from the liquid supply unit 17 passes through the inside of the outer peripheral portion 181, reaches the spiral slopes 186 and 187, and is ejected along the spiral slopes 186 and 187 into the frustoconical space 20. The start ends (upstream sides) 186A and 187A of the spiral slopes 186 and 187 are raised substantially in the axial direction.

本実施形態では、複数の螺旋スロープのうちの少なくとも１つの始端部を利用して気体通路を本体１８０から外周部１８１側へと連通する。例えば、本実施形態では始端部１８６Ａが肉厚部として形成され、その内部に気体通路が形成される。図３〜図５に示されるように、気体通路は例えば旋回流形成体１８の本体１８０（円筒部１８２、台形部１８３）の中心軸に沿った第１気体通路１８８と、肉厚部（始端部１８６Ａ）内を通って第１気体通路１８８を外周部１８１の外周面へまで連通する第２気体通路１８９とから構成される。   In the present embodiment, the gas passage is communicated from the main body 180 to the outer peripheral portion 181 side using at least one starting end portion of the plurality of spiral slopes. For example, in the present embodiment, the starting end portion 186A is formed as a thick portion, and a gas passage is formed therein. As shown in FIGS. 3 to 5, the gas passage includes, for example, a first gas passage 188 along the central axis of the main body 180 (cylindrical portion 182 and trapezoidal portion 183) of the swirling flow forming body 18, and a thick portion (starting end). 186A) and the second gas passage 189 communicating with the first gas passage 188 to the outer peripheral surface of the outer peripheral portion 181.

また、外周部１８１の内周面には、始端部１８６Ａ、１８７Ａの各々から円筒軸方向に沿って延在する梁１９０、１９１が形成される。梁１９０、１９１は、外周部１８１の内周面に沿って所定高さまで延出し、その先端は液体供給部１７に装着される可撓チューブ（不図示）の先端に当接してチューブの位置決めを行う。また、図３に示されるように、外周部１８１の外周面の一部に面取り部（１９２）を設け、旋回流形成体１８を旋回流形成体収容空間１９へ装着する際に回転方向の位置決めに用いることも可能である。   Further, beams 190 and 191 extending along the cylindrical axis direction from the respective start end portions 186A and 187A are formed on the inner peripheral surface of the outer peripheral portion 181. The beams 190 and 191 extend to a predetermined height along the inner peripheral surface of the outer peripheral portion 181, and the tip of the beams 190 abuts on the tip of a flexible tube (not shown) attached to the liquid supply portion 17 to position the tube. Do. Further, as shown in FIG. 3, a chamfered portion (192) is provided on a part of the outer peripheral surface of the outer peripheral portion 181, and positioning in the rotational direction when the swirling flow forming body 18 is mounted in the swirling flow forming body accommodation space 19. It can also be used.

以上のように、本実施形態によれば高圧の液体を液体供給部から真直ぐに旋回流形成体へ供給できるので液体の圧力損失を低減させることができる。また気体を旋回流形成体収容空間に設けた横穴から供給することで気体供給路と液体供給路を旋回流形成体の位置で分岐することができるため、その構成が極めて簡略になり部品点数が大幅に低減できる。   As described above, according to the present embodiment, since a high-pressure liquid can be supplied straight from the liquid supply unit to the swirling flow forming body, the pressure loss of the liquid can be reduced. Moreover, since the gas supply path and the liquid supply path can be branched at the position of the swirl flow forming body by supplying the gas from the side hole provided in the swirl flow forming body accommodating space, the configuration is extremely simplified and the number of parts is reduced. It can be greatly reduced.

また、微細気泡発生装置内への旋回流形成体の組み付けの際、旋回流形成体を液体供給部側から嵌挿できるので、従来のようにノズル先端を別体としてノズル側から旋回流形成体を装着する必要がなく、構造をより簡略にすることができる。   Further, when the swirl flow forming body is assembled into the fine bubble generator, the swirl flow forming body can be inserted from the liquid supply unit side, so that the swirl flow forming body is separated from the nozzle side with the nozzle tip as a separate body as in the prior art. There is no need to wear the structure, and the structure can be further simplified.

更に、本実施形態では、旋回流形成体の外周部に一対の円環状の突起部を設け、旋回流形成体の気体通路（第２気体通路）の開口部をこれら突起部の間に設けるとともに、両突起部に沿ってＯリングを配置し、旋回流形成体収容空間の内周面との圧接により突起部の間に形成される空間の気密性を維持するため、極めて簡略な構成で気密性の維持が可能となる。また、これにより気体供給部から続く横穴は、突起部の間に形成される円環状の空間内に対応した位置に設ければよいので加工上の許容誤差も拡大され、組み付け時における旋回流形成体の回転方向の位置決めも容易になる。   Furthermore, in this embodiment, a pair of annular protrusions are provided on the outer periphery of the swirl flow forming body, and an opening of the gas passage (second gas passage) of the swirl flow forming body is provided between these protrusions. In order to maintain the airtightness of the space formed between the protrusions by placing the O-ring along both protrusions and press-contacting with the inner peripheral surface of the swirl flow forming body accommodating space, the airtightness is extremely simple. It becomes possible to maintain sex. In addition, the lateral hole that continues from the gas supply unit only needs to be provided at a position corresponding to the annular space formed between the projections, so that the processing tolerance is increased and swirl flow formation during assembly is achieved. Positioning in the rotational direction of the body is also facilitated.

なお、本実施形態では、螺旋スロープが一対であったためスロープ範囲が略１８０°（実際には肉厚部や梁の分狭い）とされたが、これは螺旋スロープを軸方向に重ならないようにするためのもので、螺旋スロープの数がｎのときは、螺旋スロープの範囲は３６０°／ｎよりも狭くすればよい。   In this embodiment, since the spiral slope is a pair, the slope range is approximately 180 ° (actually narrow due to the thick portion and the beam). However, this does not overlap the spiral slope in the axial direction. When the number of spiral slopes is n, the spiral slope range may be narrower than 360 ° / n.

また、本実施形態において、旋回流形成体の本体（円筒部、台形部）、螺旋スロープ、肉厚部、梁、外周部、突起部、第１気体通路、第２気体通路は、射出成形により一体的に形成される。   Moreover, in this embodiment, the main body (cylindrical part, trapezoid part), spiral slope, thick part, beam, outer peripheral part, projection part, first gas passage, and second gas passage of the swirl flow forming body are formed by injection molding. It is formed integrally.

１０ 微細気泡発生装置
１１ 微細気泡発生装置本体
１２ 穴
１３ 横穴
１４ 穴
１５ ノズル
１６ 気液混合空間
１７ 液体供給部
１８ 旋回流形成体
１９ 旋回流形成体収容空間
２０ 円錐台形空間
２１ 段部
２２ 円環状空間
２３ 流量調整機構
２５、２６ Ｏリング
１８０ 旋回流形成体本体
１８１ 外周部
１８２ 円筒部
１８３ 台形部
１８４、１８５ 突起部
１８６、１８７ 螺旋スロープ
１８８ 第１気体通路
１８９ 第２気体通路
１９０、１９１ 梁 DESCRIPTION OF SYMBOLS 10 Fine bubble generating apparatus 11 Fine bubble generating apparatus main body 12 Hole 13 Side hole 14 Hole 15 Nozzle 16 Gas-liquid mixing space 17 Liquid supply part 18 Swirling flow formation body 19 Swirling flow formation body accommodation space 20 Frustum trapezoid space 21 Step part 22 Ring shape Space 23 Flow rate adjusting mechanism 25, 26 O-ring 180 Swirling flow forming body main body 181 Outer peripheral portion 182 Cylindrical portion 183 Trapezoidal portion 184, 185 Protruding portion 186, 187 Spiral slope 188 First gas passage 189 Second gas passage 190, 191 Beam

Claims (7)

螺旋通路を通して加圧された液体をノズル内の気液混合空間に供給し旋回流を発生させ、前記旋回流により発生する負圧を用いて気体を前記気液混合空間に導き入れることで気液二相旋回流を形成し、前記気液二相旋回流を前記ノズルから噴出することにより気液二相流体をせん断し微細気泡を発生する微細気泡発生装置に設けられる収容空間に嵌装され前記螺旋通路を形成する旋回流形成体であって、
円筒部を有する本体と、
前記円筒部と同軸的な円筒内周面を有する外周部と、
前記本体と前記外周部の間に形成される螺旋スロープと、
前記螺旋スロープの始端部において前記円筒部と前記外周部の間を連絡する肉厚部と、
前記円筒部の中心軸に沿って形成される第１気体通路と、
前記肉厚部内を通って前記第１気体通路を前記外周部の外側へと連絡する第２気体通路と
を備えることを特徴とする旋回流形成体。 The liquid pressurized through the spiral passage is supplied to the gas-liquid mixing space in the nozzle to generate a swirling flow, and gas is introduced into the gas-liquid mixing space by using the negative pressure generated by the swirling flow. A two-phase swirl flow is formed, and the gas-liquid two-phase swirl flow is ejected from the nozzle so as to shear the gas-liquid two-phase fluid and to be fitted in an accommodation space provided in a fine bubble generator that generates fine bubbles. A swirl flow forming body forming a spiral passage ,
A body having a cylindrical portion;
An outer peripheral portion having a cylindrical inner peripheral surface coaxial with the cylindrical portion;
A spiral slope formed between the body and the outer periphery;
A thick portion communicating between the cylindrical portion and the outer peripheral portion at the start end of the spiral slope;
A first gas passage formed along the central axis of the cylindrical portion;
A swirling flow forming body comprising: a second gas passage that communicates the first gas passage to the outside of the outer peripheral portion through the thick portion. 前記外周部が円筒状の外周面を有し、前記外周面の周方向に沿って一対の円環状突起部が形成され、前記第２気体通路の開口部が前記一対の円環状突起部の間に形成されることを特徴とする請求項１に記載の旋回流形成体。 The outer peripheral portion has a cylindrical outer peripheral surface, a pair of annular projections are formed along a circumferential direction of the outer peripheral surface, and an opening of the second gas passage is between the pair of annular projections The swirl flow forming body according to claim 1, wherein the swirl flow forming body is formed as follows. 前記螺旋スロープが複数設けられ、前記複数の螺旋スロープ同士が前記中心軸方向に重ならないことを特徴とする請求項１に記載の旋回流形成体。 The swirl flow forming body according to claim 1, wherein a plurality of the spiral slopes are provided, and the plurality of spiral slopes do not overlap with each other in the central axis direction. 前記螺旋スロープの始端部が前記外周部の円筒軸に沿って立ち上げられ、前記始端部から前記円筒軸に沿って延在する梁部が前記外周部の円筒内周面に形成されることを特徴とする請求項１に記載の旋回流形成体。 Is beginning before Symbol helical slope up along the cylindrical axis of the outer peripheral portion, the beam portion that Mashimasu extends along the cylindrical axis from the starting end is formed in a cylindrical inner peripheral surface of the outer peripheral portion The swirl flow forming body according to claim 1. 請求項１に記載の旋回流形成体が装着される微細気泡発生装置であって、前記旋回流形成体が嵌挿される旋回流形成体収容空間に横穴が設けられ、前記旋回流形成体装着時、前記横穴が前記第２気体通路へと接続されることを特徴とする微細気泡発生装置。   A microbubble generator to which the swirling flow forming body according to claim 1 is mounted, wherein a lateral hole is provided in a swirling flow forming body receiving space into which the swirling flow forming body is inserted, and when the swirling flow forming body is mounted. The fine bubble generating device is characterized in that the lateral hole is connected to the second gas passage. 旋回流形成体の前記外周部が円筒状の外周面を有し、前記外周面の周方向に沿って一対の円環状突起部が形成され、前記第２気体通路の開口部が前記一対の円環状突起部の間に形成され、前記横穴が前記一対の円環状突起部の間に配置されることを特徴とする請求項５に記載の微細気泡発生装置。   The outer peripheral portion of the swirl flow forming body has a cylindrical outer peripheral surface, a pair of annular projections are formed along the circumferential direction of the outer peripheral surface, and the opening of the second gas passage is the pair of circular The microbubble generator according to claim 5, wherein the microbubble generator is formed between the annular protrusions, and the lateral hole is disposed between the pair of annular protrusions. 前記一対の円環状突起部に挟まれて形成される環状空間の外側に前記円環状突起部に隣接してＯリングがそれぞれ配置されることを特徴とすることを特徴とする請求項６に記載の微細気泡発生装置。   The O-ring is disposed on the outer side of the annular space formed between the pair of annular projections, adjacent to the annular projection, respectively. Fine bubble generator.
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