JP6877288B2

JP6877288B2 - Spray nozzle

Info

Publication number: JP6877288B2
Application number: JP2017148089A
Authority: JP
Inventors: 純石松; 哲彦矢野; 良成今川; 明宏池口
Original assignee: Yamaho Industry Co Ltd; Nissan Chemical Corp
Current assignee: Yamaho Industry Co Ltd; Nissan Chemical Corp
Priority date: 2017-07-31
Filing date: 2017-07-31
Publication date: 2021-05-26
Anticipated expiration: 2037-07-31
Also published as: JP2019025432A

Description

本発明は、薬液と空気とを混合した混合流体を散布する噴霧ノズルに関するものである。 The present invention relates to a spray nozzle for spraying a mixed fluid in which a chemical solution and air are mixed.

従来、薬液と空気とを混合した混合流体を散布するための噴霧ノズルが知られている。例えば、特許文献１には、液体が流れる流路及びこの流路に外部から空気を取り入れる空気取り入れ口を備えたノズルホルダと、このノズルホルダの内部に配置され、小孔を形成したオリフィス板と、ノズルホルダの上部（下流側）に取付けられた外噴板とを備えた噴霧ノズルが開示されている。この噴霧ノズルは、圧送管から流れた薬液がオリフィス板の小孔を通り、空気取り入れ口から外部の空気と液体とを混合して、流路に流れ、外噴板から一方向に向かって噴霧される。 Conventionally, a spray nozzle for spraying a mixed fluid in which a chemical solution and air are mixed is known. For example, Patent Document 1 describes a nozzle holder having a flow path through which a liquid flows and an air intake port for taking in air from the outside into the flow path, and an orifice plate arranged inside the nozzle holder and forming a small hole. Disclosed is a spray nozzle provided with an external injection plate attached to the upper part (downstream side) of the nozzle holder. In this spray nozzle, the chemical liquid flowing from the pumping pipe passes through the small hole of the orifice plate, mixes the external air and liquid from the air intake port, flows into the flow path, and sprays in one direction from the outer spray plate. Will be done.

また、図１０に示す噴霧ノズル１０１では、ノズル本体１０２が下流側で二股状に分岐しており、混合流体を二方向に散布することを可能にしている。この二方向に散布する１噴霧ノズル１０１の噴霧パターンは、第１噴射口１０３及び第２噴射口１０４を正面視したとき（図１０（ａ）参照）、第１噴射口１０３及び第２噴射口１０４からの混合流体が細長い線状に噴霧されており、第１噴射口１０３及び第２噴射口１０４を側面視したとき（図１０（ｂ）参照）、第１噴射口１０３及び第２噴射口１０４からの混合流体が広い扇状に噴霧さている。 Further, in the spray nozzle 101 shown in FIG. 10, the nozzle body 102 is bifurcated on the downstream side, enabling the mixed fluid to be sprayed in two directions. The spray pattern of the one spray nozzle 101 spraying in the two directions shows the first injection port 103 and the second injection port 103 when the first injection port 103 and the second injection port 104 are viewed from the front (see FIG. 10A). When the mixed fluid from 104 is sprayed in an elongated linear shape and the first injection port 103 and the second injection port 104 are viewed from the side (see FIG. 10B), the first injection port 103 and the second injection port 103 The mixed fluid from 104 is sprayed in a wide fan shape.

特許第４５２３４８４号Patent No. 4523484

しかしながら、特許文献１に記載された噴霧ノズルでは、次のような問題がある。
この従来例では、オリフィス板の小孔の径が小さいため、小孔を通過した薬液と外部の空気との混合が不安定になることがある。これにより、外噴板から噴霧される混合流体の粒子がばらつき、更に、噴霧された混合流体が空気中に浮遊し、風によって漂流飛散する、いわゆる、ドリフト現象が起き、噴霧パターンが乱れてしまう虞がある。 However, the spray nozzle described in Patent Document 1 has the following problems.
In this conventional example, since the diameter of the small hole of the orifice plate is small, the mixing of the chemical solution that has passed through the small hole and the outside air may become unstable. As a result, the particles of the mixed fluid sprayed from the outer injection plate are dispersed, and the sprayed mixed fluid is suspended in the air, drifting and scattering due to the wind, a so-called drift phenomenon occurs, and the spray pattern is disturbed. There is a risk.

一方、図１０に示される二方向に噴霧する噴霧ノズルでは、混合流体が前後二層になって広い扇状に噴霧さているため、風によって漂流飛散し、噴霧パターンが乱れてしまう虞がある。 On the other hand, in the spray nozzle for spraying in two directions shown in FIG. 10, since the mixed fluid is sprayed in a wide fan shape in two layers in the front and rear, there is a risk that the spray pattern will be disturbed by drifting and scattering due to the wind.

本発明は、上記課題に鑑みてなされたものであり、薬液と空気との混合が安定し、噴霧された混合流体が漂流飛散し難くした噴霧ノズルを提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a spray nozzle in which a mixture of a chemical solution and air is stable and the sprayed mixed fluid is less likely to drift and scatter.

（発明の態様）
以下の発明の態様は、本発明の態様を例示するものであり、本発明の多様な構成要素の理解を容易にするために、項分けして説明するものである。以下の各項は、本発明の技術的範囲を限定するものではなく、本発明を実施する最良の形態を参酌しつつ、各項の構成要素の一部を置換し、削除し、または、さらに他の構成要素を付加した態様についても、本発明の一態様になり得るものである。 (Aspect of the invention)
The following aspects of the invention exemplify aspects of the present invention and are described separately in order to facilitate understanding of the various components of the present invention. The following sections do not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further, while taking into consideration the best mode for carrying out the present invention. A mode in which other components are added can also be a mode of the present invention.

（１）薬液と空気とを混合した混合流体を霧状に散布する噴霧ノズルであって、
基端側に配置され、前記薬液と前記空気とが混合する混合室と、該混合室から先端側に延びる流路と、前記混合室内に外部から空気を導入する導入路とが形成されたノズルホルダと、
前記ノズルホルダの先端側に配置され、前記流路から前記混合流体を受けて、前記混合流体を噴射するスリットが形成された先噴板と、
前記ノズルホルダの先端に前記先噴板を保持するノズルキャップと、
前記先噴板と前記ノズルホルダとの間に配置され、前記流路から前記混合流体を受けて、前記混合流体を前記先噴板の前記スリットへと案内する複数の案内流路が形成された整流中子と、
前記混合室の前記流路と前記導入路との合流位置よりも前記流路の上流側に配置され、かつ、上流側から前記薬液を受けて前記混合室に前記薬液を供給するピンホールが形成されたオリフィス板と、
前記オリフィス板よりも前記流路の上流側に設けられ、前記オリフィス板と前記ノズルホルダと連結される連結具に設けられるフィルタとの間に配置され、前記薬液が流れる薬液流路が形成されたオリフィス中子と、を備え、
前記先噴板には、下流側に向けて筋状に突出する筋状絞り部が形成され、該筋状絞り部を横切る態様で前記スリットが形成されており、
前記整流中子には、前記先噴板の前記スリットに向けて先端幅が縮小する態様で整流突起部が形成され、かつ、該整流突起部を構成する壁面が前記複数の案内流路を構成する壁面の下流側に配置されており、
前記オリフィス板には、下流側へ向けてドーム状に突出するドーム状絞り部が形成され、該ドーム状絞り部の頂部に前記ピンホールが形成されている噴霧ノズル（請求項１）。 (1) A spray nozzle that sprays a mixed fluid in which a chemical solution and air are mixed in a mist form.
A nozzle arranged on the base end side and formed with a mixing chamber in which the chemical solution and the air are mixed, a flow path extending from the mixing chamber to the tip side, and an introduction path for introducing air into the mixing chamber from the outside. With the holder
A front injection plate arranged on the tip end side of the nozzle holder and formed with a slit for receiving the mixed fluid from the flow path and injecting the mixed fluid.
A nozzle cap that holds the tip jet plate at the tip of the nozzle holder,
A plurality of guide flow paths are formed which are arranged between the front injection plate and the nozzle holder, receive the mixed fluid from the flow path, and guide the mixed fluid to the slit of the front injection plate. With the rectifying core,
A pinhole is formed which is arranged on the upstream side of the flow path from the confluence position of the flow path and the introduction path of the mixing chamber and receives the chemical solution from the upstream side and supplies the chemical solution to the mixing chamber. Orifice plate and
A chemical liquid flow path is formed which is provided on the upstream side of the flow path with respect to the orifice plate and is arranged between the orifice plate and a filter provided in a connector connected to the nozzle holder to allow the chemical liquid to flow. With an orifice core,
The front jet plate is formed with a streak-shaped throttle portion that protrudes in a streak shape toward the downstream side, and the slit is formed so as to cross the streak-shaped throttle portion.
The rectifying core is formed with a rectifying protrusion in a manner in which the tip width is reduced toward the slit of the front injection plate, and the wall surface constituting the rectifying protrusion constitutes the plurality of guide flow paths. It is located on the downstream side of the wall surface
A spray nozzle (claim 1) in which a dome-shaped throttle portion is formed on the orifice plate so as to project in a dome shape toward the downstream side, and the pinhole is formed at the top of the dome-shaped throttle portion.

本項に係る噴霧ノズルの先端側においては、先噴板とノズルホルダとの間に、配置された整流中子に先噴板のスリットへと案内する複数の案内流路が形成されていることから、この複数の案内路を介して、ノズルホルダの流路を流れる混合流体が先噴板のスリットに向かって案内されるものである。また、噴霧ノズルは、先噴板に下流側に向けて筋状に突出する筋状絞り部が形成され、この筋状絞り部にスリットが形成されていることで、整流中子の案内流路を流れる混合流体は、筋状絞り部に集まり、筋状絞り部のスリットを介して、噴霧ノズルの外部へと噴霧されるものとなる。 On the tip side of the spray nozzle according to this section, a plurality of guide flow paths are formed between the front injection plate and the nozzle holder to guide the rectifying core arranged to the slit of the front injection plate. Therefore, the mixed fluid flowing through the flow path of the nozzle holder is guided toward the slit of the pre-injection plate through the plurality of guide paths. Further, in the spray nozzle, a streak-shaped narrowing portion that protrudes in a streak shape toward the downstream side is formed on the first spray plate, and a slit is formed in this streak-shaped narrowing portion, so that the guide flow path of the rectifying core is formed. The mixed fluid flowing through the streaks gathers in the streak-squeezed portion and is sprayed to the outside of the spray nozzle through the slit of the streak-squeezed portion.

しかも、本項に係る噴霧ノズルにおいて、整流中子には、筋状絞り部に形成されたスリットに向けて先端幅が縮小する整流突起部が形成されていることから、整流中子の案内流路を通過してスリットに向かう混合流体は、案内流路を構成する壁面の下流側に配置された、整流突起部を構成する壁面に沿って案内され、筋状絞り部に向けて円滑に流れて行く。そして、混合流体は、筋状絞り部と、整流中子に形成された整流突起部との間の間隙を流れて、筋状絞り部に形成されたスリットを通過する。スリットを通過した混合流体は、粒子径のばらつきが少ない、すなわち、ドリフトの影響を受け易い過剰に微細な噴霧粒子の割合や、拡散し難い過剰に粒子径の大きな噴霧粒子の割合が少なく、噴霧に適した粒子径を大部分とする噴霧粒子となって、噴霧ノズルの外部へと噴霧されるものとなる。 Moreover, in the spray nozzle according to this section, the rectifying core is formed with a rectifying protrusion whose tip width is reduced toward the slit formed in the streak drawing portion, so that the guide flow of the rectifying core is formed. The mixed fluid that passes through the path and heads for the slit is guided along the wall surface that constitutes the rectifying protrusion, which is arranged on the downstream side of the wall surface that constitutes the guide flow path, and flows smoothly toward the streak drawing portion. Go. Then, the mixed fluid flows through the gap between the streak drawing portion and the rectifying protrusion formed in the rectifying core, and passes through the slit formed in the streak drawing portion. The mixed fluid that has passed through the slit has little variation in particle size, that is, the proportion of overly fine spray particles that are easily affected by drift and the proportion of overly large atomized particles that are difficult to diffuse are small, and the mixture is sprayed. The particles are spray particles having a particle size suitable for the above, and are sprayed to the outside of the spray nozzle.

更に、噴霧ノズルの基端部においては、混合室の流路と導入路との合流位置よりも流路の上流側に配置されたオリフィス板に、ピンホールが形成されていることから、オリフィス板の上流側の薬液は、ピンホールを介して混合室に供給されるものである。オリフィス板への薬液の供給は、オリフィス板よりも流路の上流側に位置するオリフィス中子の薬液流路を介してオリフィス板へと供給され、オリフィス板に形成された下流側へ向けてドーム状に突出するドーム状絞り部のドームの頂に薬液が集まり、ドーム状絞り部の頂部に形成されたピンホールからノズルホルダの混合室に向かって円滑に流れるものとなる。 Further, at the base end of the spray nozzle, a pinhole is formed in the orifice plate arranged on the upstream side of the flow path from the confluence position of the flow path and the introduction path of the mixing chamber, so that the orifice plate is formed. The chemical solution on the upstream side of the above is supplied to the mixing chamber via a pinhole. The chemical solution to the orifice plate is supplied to the orifice plate via the chemical solution flow path of the orifice core located on the upstream side of the flow path from the orifice plate, and the dome is directed toward the downstream side formed on the orifice plate. The chemical solution collects on the top of the dome of the dome-shaped drawing portion that protrudes in a shape, and flows smoothly from the pinhole formed on the top of the dome-shaped drawing portion toward the mixing chamber of the nozzle holder.

（２）上記（１）において、前記オリフィス中子の前記薬液流路は、前記ノズルホルダの前記流路の延長方向軸に対して傾斜している噴霧ノズル（請求項２）。 (2) In the above (1), the chemical liquid flow path of the orifice core is a spray nozzle inclined with respect to the extension direction axis of the flow path of the nozzle holder (claim 2).

本項に係る噴霧ノズルにおいて、オリフィス中子の薬液流路がノズルホルダの流路の延長方向軸に対して傾斜するように形成されていることで、薬液流路を通った薬液は、薬液流路通過前の流れ状態の如何にかかわらず、薬液流路によって流れ方向が矯正され、オリフィス中子の下流側で旋回流となる。この旋回流は、オリフィス板のドーム状絞り部のドーム内においても維持され、オリフィス板のピンホールから混合室へと流れる薬液の流れが整流されることで、混合室における薬液と空気との混合状態を安定させるものとなる。 In the spray nozzle according to this section, the chemical solution flow path of the orifice core is formed so as to be inclined with respect to the extension direction axis of the flow path of the nozzle holder, so that the chemical solution flowing through the chemical solution flow path is allowed to flow. Regardless of the flow condition before passing through the path, the flow direction is corrected by the chemical flow path, and the flow becomes a swirling flow on the downstream side of the orifice core. This swirling flow is maintained even in the dome of the dome-shaped throttle portion of the orifice plate, and the flow of the chemical solution flowing from the pinhole of the orifice plate to the mixing chamber is rectified to mix the chemical solution and air in the mixing chamber. It stabilizes the state.

（３）上記（１）において、前記オリフィス中子の前記薬液流路は、前記ノズルホルダの軸方向に延びている噴霧ノズル（請求項３）。 (3) In the above (1), the chemical liquid flow path of the orifice core is a spray nozzle extending in the axial direction of the nozzle holder (claim 3).

本項に係る噴霧ノズルにおいて、オリフィス中子の薬液流路がノズルホルダの軸方向に延びるように形成されていることで、薬液流路を通った薬液は、薬液流路通過前の流れ状態の如何にかかわらず、薬液流路によって流れ方向が矯正される。この流れ方向の矯正により、オリフィス板のピンホールから混合室へと流れる薬液の流れが整流され、混合室における薬液と空気との混合状態を安定させるものとなる。 In the spray nozzle according to this section, the chemical flow path of the orifice core is formed so as to extend in the axial direction of the nozzle holder, so that the chemical liquid passing through the chemical liquid flow path is in a flow state before passing through the chemical liquid flow path. Regardless, the flow direction is corrected by the chemical flow path. By correcting the flow direction, the flow of the chemical solution flowing from the pinhole of the orifice plate to the mixing chamber is rectified, and the mixed state of the chemical solution and the air in the mixing chamber is stabilized.

（４）上記（１）乃至（３）のいずれか１項において、前記ノズルホルダの前記流路は、下流側で分岐しており、分岐した各々の前記流路の下流側に前記先噴板と、前記ノズルキャップと、前記整流中子とが配置されている噴霧ノズル（請求項４）。 (4) In any one of the above (1) to (3), the flow path of the nozzle holder is branched on the downstream side, and the front spray plate is on the downstream side of each of the branched flow paths. And the spray nozzle (claim 4) in which the nozzle cap and the rectifying core are arranged.

本項に係る噴霧ノズルにおいて、ノズルホルダの流路が下流側で分岐することで、分岐した各方向において上記作用を得て、混合流体を互いに異なる方向に同時に散布するものなる。 In the spray nozzle according to this section, by branching the flow path of the nozzle holder on the downstream side, the above action is obtained in each of the branched directions, and the mixed fluids are simultaneously sprayed in different directions.

（５）上記（１）又は（４）項において、前記整流中子の前記整流突起部は、前記先噴板の前記筋状絞り部の凹面との係合面を有し、
前記整流中子は、前記整流突起部と直列になるように配置され、前記筋状絞り部の凹面と係合する位置決め突起部を備えている噴霧ノズル（請求項５）。 (5) In the above item (1) or (4), the rectifying protrusion of the rectifying core has an engaging surface with the concave surface of the streak drawing portion of the tip injection plate.
The spray nozzle (claim 5), wherein the rectifying core is arranged so as to be in series with the rectifying protrusion, and includes a positioning protrusion that engages with the concave surface of the streak drawing portion.

本項に係る噴霧ノズルにおいて、整流中子は、整流突起部の係合面が筋状絞り部の凹面と係合し、なおかつ、先噴板の筋状絞り部の凹面と係合する位置決め突起部を整流中子と直列になるように配置し、位置決め突起部と筋状絞り部の凹面との係合により、複数の位置で、整流中子と先噴板との位置決めが行われるものである。従って、先噴板の筋状絞り部に形成されたスリットと、整流中子に形成された整流突起部との位置合わせが高精度になされ、上記作用がより安定確実に得られるものとなる。 In the spray nozzle according to this section, in the rectifying core, the engaging surface of the rectifying protrusion is engaged with the concave surface of the streak drawing portion, and the positioning protrusion is engaged with the concave surface of the streak drawing portion of the tip injection plate. The parts are arranged so as to be in series with the rectifying core, and the rectifying core and the front injection plate are positioned at a plurality of positions by engaging the positioning protrusion with the concave surface of the streak drawing portion. is there. Therefore, the slit formed in the streak-shaped throttle portion of the first injection plate and the rectifying protrusion formed in the rectifying core are aligned with high accuracy, and the above action can be obtained more stably and reliably.

（６）上記（１）乃至（５）項のいずれか１項において、前記ノズルホルダと前記整流中子との当接部分に、相補的な凹凸形状を有する位置決め部が形成されている噴霧ノズル（請求項６）。 (6) In any one of the above items (1) to (5), a spray nozzle in which a positioning portion having a complementary concave-convex shape is formed at a contact portion between the nozzle holder and the rectifying core. (Claim 6).

本項に係る噴霧ノズルにおいて、ノズルホルダと整流中子との当接部分に、相補的な凹凸形状を有する位置決め部を形成することで、ノズルホルダと整流中子との位置ずれを防ぎ、また、整流中子がノズルホルダからの脱落を防ぐものとなる。例えば、整流中子の位置決め部は、整流突起部が形成された表面の反対側の表面（上流側の表面）からノズルホルダの軸方向に沿って延びた円柱状の複数の突起である。また、ノズルホルダの位置決め部は、ノズルホルダの先端側の端面から基端部に向かって軸方向に延びた円形状の複数の穴であり、この穴は、複数の突起を挿入可能な深さ、かつ、嵌合可能な直径で形成される。 In the spray nozzle according to this section, by forming a positioning portion having a complementary uneven shape at the contact portion between the nozzle holder and the rectifying core, it is possible to prevent the nozzle holder and the rectifying core from being displaced from each other. , The rectifying core prevents the nozzle holder from falling off. For example, the positioning portion of the rectifying core is a plurality of columnar protrusions extending along the axial direction of the nozzle holder from the surface opposite to the surface on which the rectifying protrusion is formed (the surface on the upstream side). Further, the positioning portion of the nozzle holder is a plurality of circular holes extending in the axial direction from the end surface on the tip side of the nozzle holder toward the base end portion, and this hole has a depth into which a plurality of protrusions can be inserted. And, it is formed with a diameter that can be fitted.

本発明によれば、薬液と空気との混合が安定し、噴霧された混合流体が漂流飛散し難くした噴霧ノズルを提供することができる。 According to the present invention, it is possible to provide a spray nozzle in which the mixing of the chemical solution and the air is stable and the sprayed mixed fluid is less likely to drift and scatter.

本発明の第１実施形態に係る噴霧ノズルの斜視図である。It is a perspective view of the spray nozzle which concerns on 1st Embodiment of this invention. 図１に示す噴霧ノズルの平面図である。It is a top view of the spray nozzle shown in FIG. 図１に示す噴霧ノズルの断面図であり、（ａ）は、図２のＡ−Ａ線に沿う断面図であり、（ｂ）は、図２のＢ−Ｂ線に沿う断面図である。1 is a cross-sectional view of the spray nozzle shown in FIG. 1, FIG. 1A is a cross-sectional view taken along the line AA of FIG. 2, and FIG. 2B is a cross-sectional view taken along the line BB of FIG. 図１に示す噴霧ノズルの分解図である。It is an exploded view of the spray nozzle shown in FIG. 図１に示す噴霧ノズルの先噴板から噴霧された混合流体の噴霧パターンを模式的に示した図である。It is a figure which shows typically the spray pattern of the mixed fluid sprayed from the tip spray plate of the spray nozzle shown in FIG. 本発明の第２実施形態に係る噴霧ノズルの斜視図である。It is a perspective view of the spray nozzle which concerns on 2nd Embodiment of this invention. 図６に示す噴霧ノズルの断面図である。It is sectional drawing of the spray nozzle shown in FIG. 図６に示す噴霧ノズルの分解図である。It is an exploded view of the spray nozzle shown in FIG. 図６に示す噴霧ノズルの先噴板から噴霧された混合流体の噴霧パターンを模式的に示した図である。It is a figure which shows typically the spray pattern of the mixed fluid sprayed from the tip spray plate of the spray nozzle shown in FIG. 二方向に噴霧する従来の噴霧ノズルの噴霧パターンを模式的に示し、（ａ）は、噴霧ノズルの正面視における噴霧パターンであり、（ｂ）は、噴霧ノズルの側面視における噴霧パターンある。A spray pattern of a conventional spray nozzle that sprays in two directions is schematically shown, (a) is a spray pattern in the front view of the spray nozzle, and (b) is a spray pattern in the side view of the spray nozzle.

以下、本発明の第１実施形態に係る噴霧ノズルの構成を図１〜図５に基づいて詳細に説明する。
本発明の第１実施形態に係る噴霧ノズル１Ａは、薬液と空気とを混合した混合流体を所定の範囲に散布するものである。
図４に示すように、噴霧ノズル１Ａは、ノズルホルダ３と、整流中子５と、オリフィス板７と、オリフィス中子９と、先噴板１１と、ノズルキャップ１３と、Ｏリング１５と、連結具１７と、を備えている。 Hereinafter, the configuration of the spray nozzle according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.
The spray nozzle 1A according to the first embodiment of the present invention sprays a mixed fluid in which a chemical solution and air are mixed in a predetermined range.
As shown in FIG. 4, the spray nozzle 1A includes a nozzle holder 3, a rectifying core 5, an orifice plate 7, an orifice core 9, a tip injection plate 11, a nozzle cap 13, and an O-ring 15. It is provided with a connector 17.

ノズルホルダ３は、略円筒状をなしており、基端側が連結具１７（後述参照）を介して供給管１９に連結されている。このノズルホルダ３は、先端側の外周部にノズルキャップ１３の雌ねじ部６３（後述参照）と螺合する雄ねじ部２１（図３及び図４参照）が形成され、また、先端側の端面に平面視略円形状の凹部２３が形成されている。更に、ノズルホルダ３の基端側には、その外周部から径方向外側に広がるフランジ部２５が形成されている。また、図４に示されているように、ノズルホルダ３は、混合室２７と、流路２９と、導入路３１と、位置決め穴３３（位置決め部）と、大径部３５と、を備えている。混合室２７は、薬液と空気とを混合させる場所であり、ノズルホルダ３の基端側に形成されている。この混合室２７は、円筒部２７ａと、下流側に向かって縮径した縮径部２７ｂとからなり、少なくとも円筒部２７ａ内で薬液と空気とを混合させる。流路２９は、混合室２７の縮径部２７ｂに連通しており、混合室２７からノズルホルダ３の先端側に向かって軸方向に延びている。導入路３１は、ノズルホルダ３の基端側の外壁部を貫通して、混合室２７の円筒部２７ａに連通するように複数形成されている（本実施形態では２つ）。この導入路３１は、オリフィス板７のピンホール４９（すなわち、オリフィス板の頂、後述参照）より下流側に位置するものである。位置決め穴３３は、平面視略円形状であり、ノズルホルダ３の凹部２３の底面に複数形成され（本実施形態では２つ）、凹部２３の底面から基端側に向かって軸方向に延びて（混合室２７には至らない）形成されている。また、この位置決め穴３３は、整流中子５の一対の第１の位置決め突起部４５，４５（後述参照）を挿入可能な深さ、かつ、嵌合可能な直径で形成されている。大径部３５は、混合室２７より上流側に形成されており、この大径部３５にオリフィス板７及びオリフィス中子９が収納されている。 The nozzle holder 3 has a substantially cylindrical shape, and its base end side is connected to the supply pipe 19 via a connector 17 (see below). The nozzle holder 3 has a male threaded portion 21 (see FIGS. 3 and 4) screwed with a female threaded portion 63 (see later) of the nozzle cap 13 formed on the outer peripheral portion on the tip end side, and is flat on the end surface on the tip end side. A substantially circular concave portion 23 is formed. Further, on the base end side of the nozzle holder 3, a flange portion 25 extending radially outward from the outer peripheral portion thereof is formed. Further, as shown in FIG. 4, the nozzle holder 3 includes a mixing chamber 27, a flow path 29, an introduction path 31, a positioning hole 33 (positioning portion), and a large diameter portion 35. There is. The mixing chamber 27 is a place where the chemical solution and air are mixed, and is formed on the base end side of the nozzle holder 3. The mixing chamber 27 includes a cylindrical portion 27a and a reduced diameter portion 27b whose diameter is reduced toward the downstream side, and mixes the chemical solution and air in at least the cylindrical portion 27a. The flow path 29 communicates with the reduced diameter portion 27b of the mixing chamber 27, and extends axially from the mixing chamber 27 toward the tip end side of the nozzle holder 3. A plurality of introduction paths 31 are formed so as to penetrate the outer wall portion on the base end side of the nozzle holder 3 and communicate with the cylindrical portion 27a of the mixing chamber 27 (two in the present embodiment). The introduction path 31 is located downstream of the pinhole 49 of the orifice plate 7 (that is, the top of the orifice plate, see below). The positioning holes 33 have a substantially circular shape in a plan view, are formed in plurality on the bottom surface of the recess 23 of the nozzle holder 3 (two in the present embodiment), and extend axially from the bottom surface of the recess 23 toward the proximal end side. It is formed (not reaching the mixing chamber 27). Further, the positioning hole 33 is formed with a depth into which a pair of first positioning protrusions 45, 45 (see later) of the rectifying core 5 can be inserted and a diameter at which the rectifying core 5 can be fitted. The large diameter portion 35 is formed on the upstream side of the mixing chamber 27, and the orifice plate 7 and the orifice core 9 are housed in the large diameter portion 35.

整流中子５は、略平板状をなしており、噴霧ノズル１Ａの下流側に設けられ、具体的には、ノズルホルダ３の先端側の端面上に配置されている（図３参照）。この整流中子５は、案内流路３７を備え、下流側の表面に整流突起部３９及び一対の第１の位置決め突起部４１，４１が形成され、上流側の表面に隆起部４３及び一対の第２の位置決め突起部４５，４５（位置決め部）が形成されている。案内流路３７は、ノズルホルダ３の流路２９を流れる混合流体を先噴板１１のスリット５９（後述参照）に案内するものであり、複数形成されている（本実施形態では２つ）。整流突起部３９は、正面視山形状、すなわち、先噴板１１のスリット５９に向けて先端幅が縮小する突起部である（図３（ａ）及び図４参照）。この整流突起部３９は、上流側の表面の略中央に配置され、整流突起部３９の壁面が複数の案内流路３７を構成する壁面の下流側に配置されている。一対の第１の位置決め突起部４１，４１は、先噴板１１の筋状絞り部５７（後述参照）に向けて延び、平面視で案内流路３７及び整流突起部３９と直列になるように配置されている（図４参照）。隆起部４３は、ノズルホルダ３の流路２９に対向するように、略中央からノズルホルダ３の凹部２３内に向かって延びており、案内流路３７，３７との間に配置されている。一対の第２の位置決め突起部４５，４５は、略円柱状であり、複数形成され（本実施形態では２つ）、整流中子５の上流側の表面からノズルホルダ３の軸方向に沿って延びている。 The rectifying core 5 has a substantially flat plate shape, is provided on the downstream side of the spray nozzle 1A, and specifically, is arranged on the end surface on the tip end side of the nozzle holder 3 (see FIG. 3). The rectifying core 5 is provided with a guide flow path 37, and a rectifying protrusion 39 and a pair of first positioning protrusions 41 and 41 are formed on the surface on the downstream side, and a raised portion 43 and a pair on the surface on the upstream side. Second positioning protrusions 45, 45 (positioning portions) are formed. A plurality of guide flow paths 37 are formed to guide the mixed fluid flowing through the flow path 29 of the nozzle holder 3 to the slits 59 (see below) of the front injection plate 11 (two in the present embodiment). The rectifying protrusion 39 has a front view mountain shape, that is, a protrusion whose tip width decreases toward the slit 59 of the front injection plate 11 (see FIGS. 3A and 4). The rectifying protrusion 39 is arranged substantially in the center of the surface on the upstream side, and the wall surface of the rectifying protrusion 39 is arranged on the downstream side of the wall surface forming the plurality of guide flow paths 37. The pair of first positioning protrusions 41, 41 extend toward the streak drawing portion 57 (see below) of the tip injection plate 11 so as to be in series with the guide flow path 37 and the rectifying protrusion 39 in a plan view. It is arranged (see FIG. 4). The raised portion 43 extends from substantially the center toward the inside of the recess 23 of the nozzle holder 3 so as to face the flow path 29 of the nozzle holder 3, and is arranged between the guide flow paths 37 and 37. The pair of second positioning protrusions 45, 45 are substantially columnar and are formed in plurality (two in this embodiment), and are formed along the axial direction of the nozzle holder 3 from the surface on the upstream side of the rectifying core 5. It is extending.

オリフィス板７は、ドーム状をなしており、ノズルホルダ３の上流側、具体的には、混合室２７の円筒部２７ａと導入路３１との合流位置よりも上流側に位置し、ノズルホルダ３の大径部３５に設けられている（図３参照）。このオリフィス板７は、ドーム状絞り部４７を備え、このドーム状絞り部４７の頂部には、上流側から薬液を受けて混合室２７に薬液を供給するピンホール４９が形成されている。このピンホール４９は、本例では径が０．３ｍｍに形成されている。なお、ピンホール径は、適宜変更することができる。 The orifice plate 7 has a dome shape, and is located on the upstream side of the nozzle holder 3, specifically, on the upstream side of the confluence position between the cylindrical portion 27a of the mixing chamber 27 and the introduction path 31, and is located on the nozzle holder 3. (See FIG. 3). The orifice plate 7 is provided with a dome-shaped throttle portion 47, and a pinhole 49 is formed at the top of the dome-shaped throttle portion 47 to receive the chemical solution from the upstream side and supply the chemical solution to the mixing chamber 27. The pinhole 49 is formed to have a diameter of 0.3 mm in this example. The pinhole diameter can be changed as appropriate.

オリフィス中子９は、略円板状をなしており、オリフィス板７よりもノズルホルダ３の流路２９の上流側に位置し、ノズルホルダ３の大径部３５に設けられている（図３参照）。このオリフィス中子９は、外周面に薬液流路５１及び第１突起部５３（図３（ｂ）参照）が形成され、上流側の表面に第２突起部５５が形成されている。薬液流路５１は、ノズルホルダ３の流路２９の延長方向軸に対して傾斜するよう形成され（図３（ｂ）及び図４参照）、周方向に１８０°間隔を置いて設けられている。第１突起部５３は、外周の一部から径方向外側に向けて延びており（図３（ｂ）参照）、オリフィス中子９をノズルホルダ３の大径部３５に装着した後、オリフィス中子９が大径部３５から脱落を防止するためのものである。第２突起部５５には、オリフィス中子９を取外す際に、使用者が指を引掛けるための引掛け部５５ａが形成されている。 The orifice core 9 has a substantially disk shape, is located on the upstream side of the flow path 29 of the nozzle holder 3 with respect to the orifice plate 7, and is provided on the large diameter portion 35 of the nozzle holder 3 (FIG. 3). reference). The orifice core 9 has a chemical flow path 51 and a first protrusion 53 (see FIG. 3B) formed on the outer peripheral surface thereof, and a second protrusion 55 is formed on the surface on the upstream side. The chemical liquid flow path 51 is formed so as to be inclined with respect to the extension direction axis of the flow path 29 of the nozzle holder 3 (see FIGS. 3 (b) and 4), and is provided at intervals of 180 ° in the circumferential direction. .. The first protrusion 53 extends radially outward from a part of the outer circumference (see FIG. 3B), and the orifice core 9 is mounted on the large diameter portion 35 of the nozzle holder 3 and then in the orifice. The child 9 is for preventing the child 9 from falling off from the large diameter portion 35. The second protrusion 55 is formed with a hook portion 55a for the user to hook a finger when removing the orifice core 9.

先噴板１１は、略円板であり、ノズルホルダ３の先端側に配置されている。この先噴板１１は、筋状絞り部５７と、スリット５９と、を備えている。筋状絞り部５７は、下流側に向けて筋状に突出し、整流中子５の一対の第１の位置決め突起部４１，４１と係合する係合部５７ａが形成されている。スリット５９は、筋状絞り部５７の長手方向の略中央において、筋状絞り部５７を横切るようにして、筋状絞り部５７の延長方向と直交する方向に少なくとも筋状絞り部５７の頂点部分を分断する態様で形成されている。 The front injection plate 11 is a substantially disk, and is arranged on the tip end side of the nozzle holder 3. The front injection plate 11 includes a streak-shaped throttle portion 57 and a slit 59. The streak-shaped throttle portion 57 projects in a streak shape toward the downstream side, and an engaging portion 57a that engages with the pair of first positioning protrusions 41, 41 of the rectifying core 5 is formed. The slit 59 is formed so as to cross the streak-squeezed portion 57 at substantially the center in the longitudinal direction of the streak-squeezed portion 57, and at least the apex portion of the streak-squeezed portion 57 in a direction orthogonal to the extension direction of the streak-squeezed portion 57. Is formed in a manner of dividing.

ノズルキャップ１３は、略円筒状をなしており、ノズルホルダ３の先端に先噴板１１を保持するものである。このノズルキャップ１３には、ノズルホルダ３の流路２９を流れる混合流体の圧力によって、先噴板１１がノズルキャップ３から抜けないように、先端側の内周部から径方向内側に延びる環状の突起部６１が形成されている（図３参照）。また、ノズルキャップ１３の内周部には、ノズルホルダ３の雄ねじ部２１に螺合する雌ねじ部６３が形成されている（図３及び図４参照）。また、ノズルホルダ３の先端側の端面と先噴板１１との間に、かつ、整流中子５の外周部を取り囲むようにしてＯリング１５が配置され、このＯリング１５により、ノズルホルダ３と先噴板１１との間の液漏れを防いでいる。 The nozzle cap 13 has a substantially cylindrical shape, and holds the tip injection plate 11 at the tip of the nozzle holder 3. The nozzle cap 13 has an annular shape extending radially inward from the inner peripheral portion on the tip side so that the tip injection plate 11 does not come off from the nozzle cap 3 due to the pressure of the mixed fluid flowing through the flow path 29 of the nozzle holder 3. The protrusion 61 is formed (see FIG. 3). Further, a female screw portion 63 screwed to the male screw portion 21 of the nozzle holder 3 is formed on the inner peripheral portion of the nozzle cap 13 (see FIGS. 3 and 4). Further, an O-ring 15 is arranged between the end surface on the tip end side of the nozzle holder 3 and the front injection plate 11 so as to surround the outer peripheral portion of the rectifying core 5, and the nozzle holder 3 is provided by the O-ring 15. It prevents liquid leakage between the tip jet plate 11 and the tip jet plate 11.

連結具１７は、略円筒状をなしており、これによって、ノズルホルダ３と供給管１９とが連結される。この連結具１７には、供給管１９を流れる薬液の圧力によって、ノズルホルダ３が連結具１７から抜けることのないように、先端側の内周部から径方向内側に延びて、ノズルホルダ３のフランジ部２５に当接する環状の突起部６５が形成されている（図３参照）。また、連結具１７の内周部には、供給管１９の雄ねじ部６８に螺合する雌ねじ部６９が形成されている。薬液タンク等（図示省略）から供給される薬液は、供給管１９を介して、ノズルホルダ３の流路２９に供給されるものであり、この供給管１９とノズルホルダ３との連結部には、薬液内に固形物が混入した場合に、それをろ過するフィルタ６７が設けられている。 The connector 17 has a substantially cylindrical shape, whereby the nozzle holder 3 and the supply pipe 19 are connected to each other. The connector 17 extends radially inward from the inner peripheral portion on the tip side so that the nozzle holder 3 does not come off from the connector 17 due to the pressure of the chemical solution flowing through the supply pipe 19. An annular protrusion 65 that comes into contact with the flange 25 is formed (see FIG. 3). Further, a female threaded portion 69 screwed into the male threaded portion 68 of the supply pipe 19 is formed on the inner peripheral portion of the connector 17. The chemical solution supplied from the chemical solution tank or the like (not shown) is supplied to the flow path 29 of the nozzle holder 3 via the supply pipe 19, and is connected to the connecting portion between the supply pipe 19 and the nozzle holder 3. , A filter 67 is provided to filter a solid substance mixed in the chemical solution.

次に、本発明の第１実施形態に係る噴霧ノズル１Ａにおける薬液及び混合流体の流れについて、以下に説明する。
まず、薬液タンク等から供給され、供給管１９を流れる薬液は、フィルタ６７を通過した後、ノズルホルダ３の大径部３５に向かって流込む（図３（ａ）及び（ｂ）の矢印ａ参照）。続いて、薬液は、オリフィス中子９の薬液流路５１を通過して、オリフィス板７のドーム絞り部４７内へと流れる（図３（ａ）及び（ｂ）の矢印ｂ参照）。このとき、薬液は、薬液流路５１を通過することで、旋回流となって、ドーム絞り部４７内に流込む（図３（ａ）及び（ｂ）の矢印ｃ参照）。そして、薬液がオリフィス板７のピンホール４９を通過し、混合室２７の円筒部２７ａ内に流込む。この際、薬液は、導入路３１から導入された空気と混合されながら、流路２９に流れて行く（図３（ａ）及び（ｂ）の矢印ｄ参照）。しかも、ピンホール４９を通過した薬液は、旋回流を維持しながら円筒部４７内に流込むため、導入路３１から円筒部２７ａへと導入される空気の流れが安定し、噴霧ノズル１Ａから噴霧される泡状粒子の粒子径やその噴霧パターンの安定化に寄与するものとなる。そして、流路２９を流れる混合流体は、続いて整流中子５の案内流路３７，３７を通過する（図３（ａ）の矢印ｅ参照）。このとき、混合流体が整流中子５の隆起部４３に衝突することで、混合流体の流れ方向が変化し、案内流路３７，３７へと導かれる。そして、案内流路３７，３７を流れる混合流体は、整流突起部３９と先噴板１１の筋状絞り部５７との間隙を通過し（図３（ａ）の矢印ｆ参照）、スリット５９を介して外部に噴霧される（図３（ａ）及び（ｂ）の矢印ｇ参照）。なお、先噴板１１のスリット５９から噴霧された混合流体の噴霧パターンは、本実施形態では、噴霧ノズル１Ａの正面視で約１００°の角度からなる扇状乃至扇面状に噴霧される（図５参照）。 Next, the flow of the chemical solution and the mixed fluid in the spray nozzle 1A according to the first embodiment of the present invention will be described below.
First, the chemical solution supplied from the chemical solution tank or the like and flowing through the supply pipe 19 passes through the filter 67 and then flows toward the large diameter portion 35 of the nozzle holder 3 (arrows a in FIGS. 3A and 3B). reference). Subsequently, the chemical solution passes through the chemical solution flow path 51 of the orifice core 9 and flows into the dome throttle portion 47 of the orifice plate 7 (see arrows b in FIGS. 3A and 3B). At this time, the chemical solution passes through the chemical solution flow path 51 to form a swirling flow and flows into the dome throttle portion 47 (see arrows c in FIGS. 3A and 3B). Then, the chemical solution passes through the pinhole 49 of the orifice plate 7 and flows into the cylindrical portion 27a of the mixing chamber 27. At this time, the chemical solution flows into the flow path 29 while being mixed with the air introduced from the introduction path 31 (see the arrows d in FIGS. 3A and 3B). Moreover, since the chemical solution that has passed through the pinhole 49 flows into the cylindrical portion 47 while maintaining the swirling flow, the flow of air introduced from the introduction path 31 to the cylindrical portion 27a is stable, and the chemical solution is sprayed from the spray nozzle 1A. It contributes to the stabilization of the particle size of the foamy particles and the spray pattern thereof. Then, the mixed fluid flowing through the flow path 29 subsequently passes through the guide flow paths 37 and 37 of the rectifying core 5 (see arrow e in FIG. 3A). At this time, when the mixed fluid collides with the raised portion 43 of the rectifying core 5, the flow direction of the mixed fluid changes and is guided to the guide flow paths 37 and 37. Then, the mixed fluid flowing through the guide flow paths 37 and 37 passes through the gap between the rectifying protrusion 39 and the streak drawing portion 57 of the tip injection plate 11 (see the arrow f in FIG. 3A), and passes through the slit 59. It is sprayed to the outside through (see arrow g in FIGS. 3 (a) and 3 (b)). In the present embodiment, the spray pattern of the mixed fluid sprayed from the slit 59 of the first spray plate 11 is sprayed in a fan shape or a fan surface shape having an angle of about 100 ° when viewed from the front of the spray nozzle 1A (FIG. 5). reference).

さて、上記構成を有する第１実施形態の噴霧ノズル１Ａによれば、次のような作用効果を得ることができる。すなわち、噴霧ノズル１Ａの先端側においては、先噴板１１とノズルホルダ３との間に、配置された整流中子５に先噴板１１のスリット５９へと案内する複数の案内流路３７，３７が形成されていることから、この複数の案内路３７，３７を介して、ノズルホルダ３の流路２９を流れる混合流体が先噴板１１のスリット５９に向かって案内される。また、噴霧ノズル１Ａは、先噴板１１に下流側に向けて筋状に突出する筋状絞り部５７が形成され、この筋状絞り部５７にスリット５９が形成されていることで、整流中子５の複数の案内流路３７，３７を流れる混合流体は、筋状絞り部５７に集まり、スリット５９を介して、噴霧ノズル１Ａの外部へと噴霧されることとなる。 By the way, according to the spray nozzle 1A of the first embodiment having the above configuration, the following effects can be obtained. That is, on the tip side of the spray nozzle 1A, a plurality of guide flow paths 37 that guide the rectifying core 5 arranged between the front injection plate 11 and the nozzle holder 3 to the slit 59 of the front injection plate 11. Since the 37 is formed, the mixed fluid flowing through the flow path 29 of the nozzle holder 3 is guided toward the slit 59 of the pre-injection plate 11 through the plurality of guide paths 37, 37. Further, the spray nozzle 1A is being rectified by forming a streak-shaped narrowing portion 57 that protrudes in a streak shape toward the downstream side on the first spray plate 11, and a slit 59 is formed in the streak-shaped narrowing portion 57. The mixed fluid flowing through the plurality of guide flow paths 37 and 37 of the child 5 collects in the streak drawing portion 57 and is sprayed to the outside of the spray nozzle 1A through the slit 59.

噴霧ノズル１Ａにおいて、整流中子５には、筋状絞り部５７に形成されたスリット５９に向けて先端幅が縮小する整流突起部３９が形成されていることから、整流中子５の複数の案内流路３７，３７を通過してスリット５９に向かう混合流体は、複数の案内流路３７，３７を構成する壁面の下流側に配置された、整流突起部３９を構成する壁面に沿って案内され、筋状絞り部５７に向けて円滑に流れて行くことが可能となる。更に、スリット５９を通過した混合流体は、粒子径のばらつきが少ない、すなわち、ドリフトの影響を受け易い過剰に微細な噴霧粒子の割合や、拡散し難い過剰に粒子径の大きな噴霧粒子の割合が少なく、噴霧に適した粒子径を大部分とする噴霧粒子となって、噴霧ノズル１Ａの外部へと噴霧される。これにより、噴霧ノズル１Ａを除草剤の噴霧に用いる場合には、風などの気象条件の影響を受けることなく、広範囲に適量の除草剤を噴霧して、除草効果を高めることが可能となる。 In the spray nozzle 1A, since the rectifying core 5 is formed with a rectifying protrusion 39 whose tip width is reduced toward the slit 59 formed in the streak drawing portion 57, a plurality of rectifying cores 5 are formed. The mixed fluid passing through the guide flow paths 37, 37 and heading toward the slit 59 is guided along the wall surface forming the rectifying protrusion 39, which is arranged on the downstream side of the wall surface forming the plurality of guide flow paths 37, 37. Therefore, it becomes possible to smoothly flow toward the streak-shaped squeezing portion 57. Further, the mixed fluid that has passed through the slit 59 has little variation in particle size, that is, the proportion of excessively fine spray particles that are easily affected by drift and the proportion of atomized particles that are difficult to diffuse and have an excessively large particle size. It becomes spray particles having a small particle size and most of the particle size suitable for spraying, and is sprayed to the outside of the spray nozzle 1A. As a result, when the spray nozzle 1A is used for spraying the herbicide, it is possible to spray an appropriate amount of the herbicide over a wide area without being affected by weather conditions such as wind to enhance the herbicide effect.

更に、噴霧ノズル１Ａの基端部においては、混合室２７の円筒部２７ａと導入路３１との合流位置よりも流路２９の上流側に配置されたオリフィス板７に、ピンホール４９が形成されていることから、オリフィス板７の上流側の薬液は、ピンホール４９を介して混合室２７の円筒部２７ａ内に供給される。また、薬液は、オリフィス板７よりも流路の上流側に位置するオリフィス中子９の薬液流路５１，５１を介してオリフィス板７へと供給され、オリフィス板７に形成された下流側へ向けてドーム状に突出するドーム状絞り部４７のドームの頂に薬液が集まる。これのより、ドーム状絞り部４７の頂部に形成されたピンホール４９からノズルホルダ３の混合室２７の円筒部２７ａに向かって円滑に流込むこととなる。このため、導入路３１から円筒部２７ａへと導入される空気の流入状態が、円筒部２７ａ内の薬液の流れの乱れによって阻害されることなく安定する。よって、円筒部２７ａに流入した薬液と空気とが一定の割合で混合され、混合流体は、混合室２７の下流の流路２９へと送り込まれることとなる。このように、混合室２７において、薬液と空気との割合が安定した混合流体を作り出すことで、最終的に先噴板１１のスリット５９から、泡状粒子の態様で噴霧ノズル１Ａの外部へと噴霧される混合流体の、粒子径やその噴霧パターンの安定化に寄与するものとなる。 Further, at the base end portion of the spray nozzle 1A, a pinhole 49 is formed in the orifice plate 7 arranged on the upstream side of the flow path 29 from the confluence position between the cylindrical portion 27a of the mixing chamber 27 and the introduction path 31. Therefore, the chemical solution on the upstream side of the orifice plate 7 is supplied into the cylindrical portion 27a of the mixing chamber 27 via the pinhole 49. Further, the chemical solution is supplied to the orifice plate 7 via the chemical solution flow paths 51 and 51 of the orifice core 9 located on the upstream side of the flow path from the orifice plate 7, and to the downstream side formed on the orifice plate 7. The chemical solution collects on the top of the dome of the dome-shaped squeezing portion 47 that projects in a dome shape toward the dome. As a result, the pinhole 49 formed at the top of the dome-shaped throttle portion 47 smoothly flows toward the cylindrical portion 27a of the mixing chamber 27 of the nozzle holder 3. Therefore, the inflow state of the air introduced from the introduction path 31 into the cylindrical portion 27a is stabilized without being hindered by the turbulence of the flow of the chemical solution in the cylindrical portion 27a. Therefore, the chemical solution flowing into the cylindrical portion 27a and the air are mixed at a constant ratio, and the mixed fluid is sent to the flow path 29 downstream of the mixing chamber 27. In this way, by creating a mixed fluid in which the ratio of the chemical solution and the air is stable in the mixing chamber 27, the slit 59 of the first injection plate 11 finally moves to the outside of the spray nozzle 1A in the form of foamy particles. It contributes to the stabilization of the particle size and the spray pattern of the mixed fluid to be sprayed.

また、噴霧ノズル１Ａにおいて、オリフィス中子９の薬液流路５１，５１がノズルホルダ３の流路２９の延長方向軸に対して傾斜するように形成されていることで、薬液流路５１，５１を通った薬液は、薬液流路通過前の流れ状態の如何にかかわらず、薬液流路によって流れ方向が矯正され、オリフィス中子９の下流側で旋回流となる。この旋回流は、オリフィス板７のドーム状絞り部４７のドーム内でも維持され、オリフィス板７のピンホール４９から混合室２７へと流れる薬液の流れが整流されることで、上述のごとく、混合室２７の円筒部２７ａにおける薬液と空気との混合状態を安定させることが可能となる。 Further, in the spray nozzle 1A, the chemical liquid flow paths 51 and 51 of the orifice core 9 are formed so as to be inclined with respect to the extension direction axis of the flow path 29 of the nozzle holder 3, so that the chemical liquid flow paths 51 and 51 are formed. The flow direction of the chemical solution that has passed through is corrected by the chemical solution flow path regardless of the flow state before passing through the chemical solution flow path, and becomes a swirling flow on the downstream side of the orifice core 9. This swirling flow is maintained even in the dome of the dome-shaped throttle portion 47 of the orifice plate 7, and the flow of the chemical liquid flowing from the pinhole 49 of the orifice plate 7 to the mixing chamber 27 is rectified, so that the mixture is mixed as described above. It is possible to stabilize the mixed state of the chemical solution and air in the cylindrical portion 27a of the chamber 27.

また、噴霧ノズル１Ａにおいて、整流中子５は、整流突起部３９の係合面が筋状絞り部５７の凹面と係合し、なおかつ、筋状絞り部５７の凹面と係合する一対の第１の位置決め突起部４１，４１を整流中子５と離間した位置に備えていることから、一対の第１の位置決め突起部４１，４１と筋状絞り部５７の凹面との係合により、複数の位置で、整流中子５と先噴板１１との位置決めが行われることが可能となる。これにより、筋状絞り部５７に形成されたスリット５９と、整流中子５に形成された整流突起部３９との位置合わせが高精度になされ、上述の作用効果がより安定確実に得られるものとなる。 Further, in the spray nozzle 1A, in the rectifying core 5, the engaging surface of the rectifying protrusion 39 engages with the concave surface of the streak drawing portion 57, and the rectifying core 5 engages with the concave surface of the streak drawing portion 57. Since the positioning protrusions 41 and 41 of 1 are provided at positions separated from the rectifying core 5, a plurality of positioning protrusions 41 and 41 are engaged with the concave surface of the pair of first positioning protrusions 41 and 41 and the streak drawing portion 57. At this position, the rectifying core 5 and the front injection plate 11 can be positioned. As a result, the slit 59 formed in the streak-shaped throttle portion 57 and the rectifying protrusion 39 formed in the rectifying core 5 are aligned with high accuracy, and the above-mentioned action and effect can be obtained more stably and reliably. It becomes.

また、噴霧ノズル１Ａにおいて、ノズルホルダ３に複数の位置決め穴３３，３３を形成し、整流中子５に一対の第２の位置決め突起部４５，４５を形成することで、ノズルホルダ３と整流中子５との位置ずれを防ぎ、また、整流中子５がノズルホルダ３からの脱落を防ぐことが可能となる。 Further, in the spray nozzle 1A, a plurality of positioning holes 33, 33 are formed in the nozzle holder 3, and a pair of second positioning protrusions 45, 45 are formed in the rectifying core 5, so that the nozzle holder 3 and the rectifying core 5 are being rectified. It is possible to prevent the position deviation from the child 5 and prevent the rectifying core 5 from falling off from the nozzle holder 3.

次に、本発明の第２実施形態の噴霧ノズル１Ｂについて、図６〜図９を参照して説明する。なお、以下の説明において、上記第１実施形態の噴霧ノズル１Ａに対して、同様の部分には同じ参照符号を用いて、異なる部分についてのみ詳細に説明する。 Next, the spray nozzle 1B of the second embodiment of the present invention will be described with reference to FIGS. 6 to 9. In the following description, with respect to the spray nozzle 1A of the first embodiment, the same reference numerals are used for the same parts, and only different parts will be described in detail.

図７及び図８に示すように、第２実施形態の噴霧ノズル１Ｂは、混合流体を二方向に噴霧するものであり、第１実施形態に係るノズルホルダ３の代わりに、第１ノズルホルダ７１（ノズルホルダ）と、第２ノズルホルダ７３と、を備えている。第１ノズルホルダ７１は、第２ノズルホルダ７３にいわゆるムリバメ、すなわち、第１ノズルホルダ７１の先端側を第２ノズルホルダ７３の接続部７７（後述参照）の内周部に圧入した際、第１ノズルホルダ７１の第１環状係止部７４（後述参照）が第２ノズルホルダ７３の第２環状係止部７６（後述参照）によって弾性変形し、第１ノズルホルダ７１が所定の位置まで圧入されることで、第１環状係止部７４の形状が弾性復帰して、第１環状係止部７４と第２環状係止部７６とが係合し、第２ノズルホルダ７３に連結される（図７参照）。第１ノズルホルダ７１の先端側の外周部には、円錐台状をなして、基端側に向かうにしたがい径方向外側に突出する第１環状係止部７４が形成されている。また、第１ノズルホルダ７１は、流路７２と、空気の導入路３１と、オリフィス板７及びオリフィス中子９を収納する大径部３５と、オリフィス板７のドーム状絞り部４７を収納する収納部７５と、を備えている。導入路３１は、第１ノズルホルダ７１の外壁部から上流側の流路７２と収納部７５との連続位置に向かって開口するように、形成されている。第２ノズルホルダ７３は、第１ノズルホルダ７１の先端側の外周部に接続される接続部７７と、この接続部７７から二股に分岐して形成された第１分岐流路８１及び第２分岐流路８３を有する分岐部７９と、を備えている。接続部７７の内周部には、第１環状係止部７４のムリバメ時に第１環状係止部７４の弾性変形を促すと共に、ムリバメ完了時に、第１環状係止部７４に係合するための、径方向内側に帯状に一定径で突出する第２環状係止部７６（図７参照）が形成されている。また、接続部７７の内周部には、第１環状係止部７４を収容するための、第１環状係止部７４と相補的な形状を有するテーパ部８０（図７参照）が形成されている。分岐部７９の下流側先端の外周部には、ノズルキャップ１３の雌ねじ部６３と螺合する雄ねじ部７８が形成されており、分岐部７９の下流側先端に整流中子５、先噴板１１、ノズルキャップ１３及びＯリング１５が装着されている。分岐部７９の第１分岐流路８１及び第２分岐流路８３は、所定の角度で分岐し、それぞれが第１ノズルホルダ７１の流路７２に連通されている。 As shown in FIGS. 7 and 8, the spray nozzle 1B of the second embodiment sprays the mixed fluid in two directions, and instead of the nozzle holder 3 according to the first embodiment, the first nozzle holder 71 (Nozzle holder) and a second nozzle holder 73 are provided. When the first nozzle holder 71 is press-fitted into the second nozzle holder 73, that is, the tip end side of the first nozzle holder 71 is press-fitted into the inner peripheral portion of the connecting portion 77 (see below) of the second nozzle holder 73, the first nozzle holder 71 is first. The first annular locking portion 74 (see below) of the 1 nozzle holder 71 is elastically deformed by the second annular locking portion 76 (see below) of the second nozzle holder 73, and the first nozzle holder 71 is press-fitted to a predetermined position. As a result, the shape of the first annular locking portion 74 is elastically restored, and the first annular locking portion 74 and the second annular locking portion 76 are engaged and connected to the second nozzle holder 73. (See FIG. 7). A first annular locking portion 74 is formed on the outer peripheral portion of the first nozzle holder 71 on the tip end side in a truncated cone shape and projects outward in the radial direction toward the base end side. Further, the first nozzle holder 71 accommodates the flow path 72, the air introduction path 31, the large diameter portion 35 for accommodating the orifice plate 7 and the orifice core 9, and the dome-shaped narrowing portion 47 of the orifice plate 7. It is provided with a storage unit 75. The introduction path 31 is formed so as to open from the outer wall portion of the first nozzle holder 71 toward a continuous position between the flow path 72 on the upstream side and the storage portion 75. The second nozzle holder 73 includes a connecting portion 77 connected to the outer peripheral portion on the tip end side of the first nozzle holder 71, and a first branch flow path 81 and a second branch formed by bifurcating from the connecting portion 77. A branch portion 79 having a flow path 83 is provided. The inner peripheral portion of the connecting portion 77 is for encouraging elastic deformation of the first annular locking portion 74 when the first annular locking portion 74 is squeezed, and for engaging with the first annular locking portion 74 when the squeezing is completed. A second annular locking portion 76 (see FIG. 7) is formed so as to protrude inward in the radial direction in a strip shape with a constant diameter. Further, a tapered portion 80 (see FIG. 7) having a shape complementary to the first annular locking portion 74 is formed on the inner peripheral portion of the connecting portion 77 to accommodate the first annular locking portion 74. ing. A male threaded portion 78 screwed with the female threaded portion 63 of the nozzle cap 13 is formed on the outer peripheral portion of the downstream tip of the branch portion 79, and the rectifying core 5 and the tip injection plate 11 are formed at the downstream tip of the branch portion 79. , Nozzle cap 13 and O-ring 15 are attached. The first branch flow path 81 and the second branch flow path 83 of the branch portion 79 branch at a predetermined angle, and each communicates with the flow path 72 of the first nozzle holder 71.

次に、本発明の第２実施形態に係る噴霧ノズル１Ｂにおける薬液及び混合流体の流れについて、以下に説明する。
薬液タンク等から供給され、供給路１９を流れる薬液は、第１実施形態と同様に、オリフィス中子９の薬液流路５１及びオリフィス板７のピンホール４９を通り（図７の矢印ａ及びｂ参照）、ピンホール４９を通過した薬液は、旋回状態を維持しながら（図７の矢印ｃ参照）、上流側の流路７２と収納部７５との連通位置で、導入路３１から導入された空気と混同される。そして、薬液と空気が混合された混合流体は、流路７２及び第２ノズルホルダ７３の第１分岐流路８１及び第２分岐流路８３に、各々分岐して流入する（図７の矢印ｄ及びｅ参照）。そして、第１分岐流路８１及び第２分岐流路８３を各々流れる混合流体は、第１実施形態と同様に、案内流路３７，３７及び整流突起部３９と筋状絞り部５７との間隙を通って（図３（ａ）の矢印ｅ及びｆ参照）、スリット５９から外部に噴霧される（図７の矢印ｆ参照）。第１分岐流路８１及び第２分岐流路８３を流れる混合流体が、先噴板１１のスリット５９から噴霧されたときの噴霧パターンは、図９に示されているように、噴霧ノズル１Ｂの正面視で各々約５０°の角度からなる扇状乃至扇面状に噴霧され、全体で約９５°の角度からなる扇状乃至扇面状に噴霧される。 Next, the flow of the chemical solution and the mixed fluid in the spray nozzle 1B according to the second embodiment of the present invention will be described below.
The chemical solution supplied from the chemical solution tank or the like and flowing through the supply path 19 passes through the chemical solution flow path 51 of the orifice core 9 and the pinhole 49 of the orifice plate 7 (arrows a and b in FIG. 7), as in the first embodiment. (See), the chemical solution that passed through the pinhole 49 was introduced from the introduction path 31 at the communication position between the flow path 72 on the upstream side and the storage portion 75 while maintaining the swirling state (see arrow c in FIG. 7). Be confused with air. Then, the mixed fluid in which the chemical solution and the air are mixed branches into the first branch flow path 81 and the second branch flow path 83 of the flow path 72 and the second nozzle holder 73, respectively (arrow d in FIG. 7). And e). Then, the mixed fluid flowing through the first branch flow path 81 and the second branch flow path 83 is the gap between the guide flow paths 37 and 37 and the rectifying protrusion 39 and the streak drawing portion 57, respectively, as in the first embodiment. Through (see arrows e and f in FIG. 3A), it is sprayed outward from the slit 59 (see arrow f in FIG. 7). As shown in FIG. 9, the spray pattern when the mixed fluid flowing through the first branch flow path 81 and the second branch flow path 83 is sprayed from the slit 59 of the first injection plate 11 is the spray nozzle 1B. When viewed from the front, the spray is formed in a fan shape or a fan surface having an angle of about 50 °, and is sprayed in a fan shape or a fan surface having an angle of about 95 ° as a whole.

以上、第２実施形態の噴霧ノズル１Ｂによれば、以下のような作用効果を奏するものとなる。
すなわち、第２実施形態では、第２ノズルホルダ７３が二股に分岐して形成されているため、第１ノズルホルダ７１の流路７２を流れる混合流体は、第１分岐流路８１及び第２分岐流路８３の各々に分岐されて、第１分岐流路８１及び第２分岐流路８３の各々を通過し、先噴板１１，１１のスリット５９，５９から互いに異なる方向へと同時に散布することが可能となる。更に、噴霧ノズル１Ｂは、第１ノズルホルダ７１の上流側にオリフィス板７及びオリフィス中子９を配備し、第２ノズルホルダ８３の下流側先端に整流中子５、先噴板１１、ノズルキャップ１３及びＯリング１５を装着していることから、第１分岐流路８１及び第２分岐流路８３の各々おいて、上記第１実施形態と同様の作用効果を得ることが可能となる。 As described above, according to the spray nozzle 1B of the second embodiment, the following actions and effects are obtained.
That is, in the second embodiment, since the second nozzle holder 73 is formed by bifurcating, the mixed fluid flowing through the flow path 72 of the first nozzle holder 71 is the first branch flow path 81 and the second branch. It is branched into each of the flow paths 83, passes through each of the first branch flow path 81 and the second branch flow path 83, and is simultaneously sprayed from the slits 59 and 59 of the first injection plates 11 and 11 in different directions. Is possible. Further, the spray nozzle 1B has an orifice plate 7 and an orifice core 9 arranged on the upstream side of the first nozzle holder 71, and a rectifying core 5, a tip injection plate 11, and a nozzle cap at the downstream tip of the second nozzle holder 83. Since the 13 and the O-ring 15 are attached, it is possible to obtain the same effects as those in the first embodiment in each of the first branch flow path 81 and the second branch flow path 83.

なお、第１及び第２実施形態に係る噴霧ノズル１Ａ，１Ｂは、オリフィス中子９の薬液流路５１がノズルホルダ３又は第１ノズルホルダ７１の流路２９，７２の延長方向軸に対して傾斜するよう２つ形成されているが、１つ又は３つ等の流路の数を変更してもよい。また、薬液流路５１，５１がオリフィス中子９の外周面に斜め溝として形成されているが、オリフィス中子９の、外周面より内側の部分において、上流側の表面から下流側の表面に斜めに貫通するように形成してもよい。 In the spray nozzles 1A and 1B according to the first and second embodiments, the chemical liquid flow path 51 of the orifice core 9 is relative to the extension direction axis of the nozzle holder 3 or the flow paths 29 and 72 of the first nozzle holder 71. Although two are formed so as to be inclined, the number of flow paths such as one or three may be changed. Further, the chemical flow paths 51 and 51 are formed as diagonal grooves on the outer peripheral surface of the orifice core 9, but in the portion of the orifice core 9 inside the outer peripheral surface, from the surface on the upstream side to the surface on the downstream side. It may be formed so as to penetrate diagonally.

更に、第１及び第２実施形態に係る噴霧ノズル１Ａ，１Ｂでは、薬液流路５１，５１が斜め溝であるが、薬液流路５１，５１の位置とオリフィス板７のドーム状絞り部４７のドーム形状との相互関係によって、ドーム絞り部４７の薬液の流れが適切に整流され、オリフィス板７のピンホール４９を通過する薬液と空気との割合が安定した混合流体を作り出すことが得られるような場合には、この薬液流路５１，５１をノズルホルダ３又は第１ノズルホルダ７１の軸方向に延びる、１つ或いは複数の孔としてもよい。また、斜め溝の薬液流路５１，５１と、ノズルホルダ３又は第１ノズルホルダ７１の軸方向に延びる薬液流路５１，５１と、をオリフィス中子９に形成してもよい。 Further, in the spray nozzles 1A and 1B according to the first and second embodiments, the chemical liquid flow paths 51 and 51 are oblique grooves, but the positions of the chemical liquid flow paths 51 and 51 and the dome-shaped throttle portion 47 of the orifice plate 7 Due to the interrelationship with the dome shape, the flow of the chemical solution in the dome throttle portion 47 is appropriately rectified, and a mixed fluid in which the ratio of the chemical solution and the air passing through the pin hole 49 of the orifice plate 7 is stable can be obtained. In this case, the chemical flow paths 51 and 51 may be formed into one or a plurality of holes extending in the axial direction of the nozzle holder 3 or the first nozzle holder 71. Further, the chemical liquid flow paths 51 and 51 having diagonal grooves and the chemical liquid flow paths 51 and 51 extending in the axial direction of the nozzle holder 3 or the first nozzle holder 71 may be formed in the orifice core 9.

１Ａ，１Ｂ…噴霧ノズル、３…ノズルホルダ、５…整流中子、７…オリフィス板、９…オリフィス中子、２７…混合室、２９…流路、３７…案内流路、３９…整流突起部、４７…ドーム状絞り部、４９…ピンホール、５１…薬液流路、５７…筋状絞り部、５９…スリット 1A, 1B ... spray nozzle, 3 ... nozzle holder, 5 ... rectifying core, 7 ... orifice plate, 9 ... orifice core, 27 ... mixing chamber, 29 ... flow path, 37 ... guide flow path, 39 ... rectifying protrusion , 47 ... Dome-shaped diaphragm, 49 ... Pinhole, 51 ... Chemical flow path, 57 ... Streaks, 59 ... Slit

Claims

A spray nozzle that sprays a mixed fluid that is a mixture of chemicals and air in the form of a mist.
A nozzle arranged on the base end side and formed with a mixing chamber in which the chemical solution and the air are mixed, a flow path extending from the mixing chamber to the tip side, and an introduction path for introducing air into the mixing chamber from the outside. With the holder
A front injection plate arranged on the tip end side of the nozzle holder and formed with a slit for receiving the mixed fluid from the flow path and injecting the mixed fluid.
A nozzle cap that holds the tip jet plate at the tip of the nozzle holder,
A plurality of guide flow paths are formed which are arranged between the front injection plate and the nozzle holder, receive the mixed fluid from the flow path, and guide the mixed fluid to the slit of the front injection plate. With the rectifying core,
A pinhole is formed which is arranged on the upstream side of the flow path from the confluence position of the flow path and the introduction path of the mixing chamber and receives the chemical solution from the upstream side and supplies the chemical solution to the mixing chamber. Orifice plate and
A chemical liquid flow path is formed which is provided on the upstream side of the flow path with respect to the orifice plate and is arranged between the orifice plate and a filter provided in a connector connected to the nozzle holder to allow the chemical liquid to flow. With an orifice core,
The front jet plate is formed with a streak-shaped throttle portion that protrudes in a streak shape toward the downstream side, and the slit is formed so as to cross the streak-shaped throttle portion.
The rectifying core is formed with a rectifying protrusion in a manner in which the tip width is reduced toward the slit of the front injection plate, and the wall surface constituting the rectifying protrusion constitutes the plurality of guide flow paths. It is located on the downstream side of the wall surface
A spray nozzle characterized in that a dome-shaped throttle portion is formed on the orifice plate so as to project in a dome shape toward the downstream side, and the pinhole is formed at the top of the dome-shaped throttle portion.

The spray nozzle according to claim 1, wherein the chemical liquid flow path of the orifice core is inclined with respect to an extension direction axis of the flow path of the nozzle holder.

The spray nozzle according to claim 1, wherein the chemical flow path of the orifice core extends in the axial direction of the nozzle holder.

The flow path of the nozzle holder is branched on the downstream side, and the front spray plate, the nozzle cap, and the rectifying core are arranged on the downstream side of each of the branched flow paths. The spray nozzle according to any one of claims 1 to 3, wherein the spray nozzle is characterized.

The rectifying protrusion of the rectifying core has an engaging surface with the concave surface of the streak drawing portion of the tip injection plate.
Any one of claims 1 to 4, wherein the rectifying core is arranged so as to be in series with the rectifying protrusion, and includes a positioning protrusion that engages with the concave surface of the streak drawing portion. The spray nozzle according to item 1.

The spray nozzle according to any one of claims 1 to 5, wherein a positioning portion having a complementary concave-convex shape is formed at a contact portion between the nozzle holder and the rectifying core.