JPH0988916A

JPH0988916A - Fluid straightening unit

Info

Publication number: JPH0988916A
Application number: JP26470895A
Authority: JP
Inventors: Riyouichi Furukouchi; 良一古河内
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-20
Filing date: 1995-09-20
Publication date: 1997-03-31

Abstract

PROBLEM TO BE SOLVED: To reliably prevent a counterflow, and facilitate manufacture by arranging a plurality of straightening plates in which through holes whose diameter is formed so as to gradually become narrow toward an outlet from an inlet are bored in large numbers in a fluid supply pipe by truing up the direction of the obverse and reverse. SOLUTION: Through holes 2 are bored in large numbers in a straightening plate 1, and the through holes 2 are formed so that its diameter gradually becomes narrow toward a reverse side outlet 4 from an obverse side inlet 3 of the straightening plate 1. Such straightening plate 1 is arranged in a plurality at prescribed intervals by truing up the direction of the obverse and reverse, and is installed in a fluid supply pipe 6. In the straightening plate 1 of a fluid straightening unit 5 constituted in this way, in the case of the forward direction of flowing toward the outlet 4 from the inlet 3, since fluid flows along a wall surface of the through hole 2, colliding friction of the fluid itself is reduced, and fluid resistance is reduced. In the case of the reverse direction of flowing toward the inlet 3 from the outlet 4, since the fluid intensively flows to the outlet 4 of the through holes, the fluid resistance becomes high by colliding friction of the fluid itself. Therefore, a counterflow of the fluid can be reliably prevented, and the straightening plate 1 can be easily manufactured only by blanking a metallic plate.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明はプリンタのインク噴
出装置、車輌のダンパ装置などにおける流体装置の流体
の流れる方向を一定にする整流器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectifier for making a fluid flow direction of a fluid device in a printer ink ejection device, a vehicle damper device or the like constant.

【０００２】[0002]

【従来の技術】従来、流体の整流には逆方向の流れを遮
断する逆流防止装置として開閉弁などの弁装置が設定さ
れていた。しかしながら、上記従来の弁装置は、弁体に
開閉手段を設けなくてはならず弁装置が大きくなり、プ
リンタ装置等の超小型のものには設置しにくい。さらに
弁体の動作回数が極端に多い場合、衝撃による弁装置の
破損が起ったり、弁装置が破損しなくても開閉手段が緩
んだりするので調整などの煩瑣なメンテナンスを必要と
するという欠点があった。2. Description of the Related Art Conventionally, a valve device such as an on-off valve has been set as a backflow preventing device for blocking a flow in the reverse direction for rectifying a fluid. However, in the above-mentioned conventional valve device, it is necessary to provide the valve body with the opening / closing means, and the valve device becomes large, so that it is difficult to install it in an ultra-small device such as a printer device. Further, when the number of times the valve element is operated is extremely large, the valve device may be damaged due to impact, or the opening / closing means may loosen even if the valve device is not damaged. Therefore, complicated maintenance such as adjustment is required. was there.

【０００３】この欠点を解消するものとして特公昭４８
−３７２８２号に記載されているように分岐部分を設
け、分岐部分を回ってくる流体が本流と衝突し、逆流を
防止するものがある。このものは特別なメンテナンスが
いらないという効果を有するものの、分岐部分を設ける
ため超小型のものに設置できないという欠点を有する。
そこで、本発明の発明者により、平面形状において円弧
面部から先端の錐部に向け先細りのテーパ状であるとと
もに左右対称の柱状体を、順方向流体の当たる先端を円
弧面部、逆方向流体の当たる先端を錐部となるように、
整流器容器上に多数配列してなる流体整流器が出願され
た（特開平４−１６６６８２号）。このものは、特別な
メンテナンスがいらないという効果のほか、超小型のも
のに設置しやすく、分岐部分がいらずあらゆる形状の流
路に対応できるという効果を有する。As a solution to this drawback, Japanese Patent Publication No. 48
No. 372872, a branch portion is provided, and a fluid flowing around the branch portion collides with the main stream to prevent backflow. Although this one has the effect that no special maintenance is required, it has the drawback that it cannot be installed in an ultra-compact one because it has a branch portion.
In view of the above, the inventor of the present invention applies a bilaterally symmetric columnar body that has a tapered shape from the circular arc surface portion toward the conical portion of the tip in a plan view, and the forward fluid-contacting tip is contacted with the arc-shaped surface portion and the backward fluid. As the tip becomes a cone,
An application has been filed for a fluid rectifier in which a large number of fluid rectifiers are arranged on a rectifier container (JP-A-4-166682). In addition to the effect that no special maintenance is required, this one has the effects that it is easy to install in an ultra-compact one and that it can accommodate flow paths of any shape without the need for branching parts.

【０００４】[0004]

【発明が解決しようとする課題】しかし、特開平４−１
６６６８２号に記載の上記の流体整流器は、柱状体を整
流器容器上に多数配列する構成であるため製造が困難で
ある。SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open No.
The above-described fluid rectifier described in No. 66682 is difficult to manufacture because it has a configuration in which a large number of columnar bodies are arranged on the rectifier container.

【０００５】本発明は特開平４−１６６６８２号の発明
の持つ、超小型のものに設置しやすく、特別なメンテナ
ンスがいらない等の長所を失うことなく、製造が容易で
あるので、安価である流体整流器を提供することを目的
とする。The present invention is an inexpensive fluid because it is easy to install in an ultra-compact one possessed by the invention of Japanese Patent Laid-Open No. 4-166682, does not lose special advantages such as requiring no special maintenance, and is easy to manufacture. The purpose is to provide a rectifier.

【０００６】[0006]

【課題を解決するための手段】上記目的を達成するため
に本発明は、整流板に多数の通孔を穿設する。そして、
各通孔は整流板の表側の入口より裏側の出口に向けその
径を次第に狭く形成する。しかして、前記整流板を流体
が流れる流体供給管内に表裏の向きを揃えて複数枚配列
してなることを特徴とする。In order to achieve the above-mentioned object, the present invention forms a large number of through holes in a current plate. And
The diameter of each through hole is gradually reduced toward the outlet on the back side from the inlet on the front side of the straightening vane. In addition, a plurality of the straightening vanes are arranged in the fluid supply pipe in which the fluid flows so that the front and back sides are aligned.

【０００７】[0007]

【発明の実施形態】本発明の実施例を図面を参照して説
明する。図１は本発明になる流体整流器を構成する整流
板の斜視図である。整流板１は、通孔２を多数穿設した
ものである。通孔２は、整流板の表側の入口３より裏側
の出口４に向けその径を次第に狭く形成したものである
（図２）。このような整流板１は、例えばプレスにより
金属板を打抜くだけで形成でき、製造が容易である。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a rectifying plate constituting a fluid rectifier according to the present invention. The current plate 1 has a large number of through holes 2. The through hole 2 is formed such that its diameter is gradually narrowed toward the outlet 4 on the back side from the inlet 3 on the front side of the current plate (FIG. 2). Such a rectifying plate 1 can be formed, for example, by punching a metal plate with a press, and is easy to manufacture.

【０００８】流体整流器５は、このようにしてなる整流
板１を図３に示すように、表裏の向きを揃えて複数枚配
列し流体供給管６内に取付けたものである。整流板１
は、一枚であっても整流の効果を発揮するが、所定間隔
をあけて複数枚配列することにより整流の効果がより大
となり、流体整流器としての役割を充分に果たすことが
できる。また、通孔２は整流板１に多数穿設すればよい
が、穿設する位置を均等にすると、流体が場所により不
均衡になることがなくなる。また、流体の流量に対応し
て通孔の数を増減したり、流体の粘性に対応して通孔の
径および高さを調節する。例えば、流量が多い場合は、
通孔の数を増す、粘性が大きい場合は通孔の径を大にし
たり高さを低くしたりする。As shown in FIG. 3, the fluid rectifier 5 is formed by arranging a plurality of the rectification plates 1 thus arranged with their front and back sides aligned and installed in the fluid supply pipe 6. Baffle plate 1
Even if only one sheet is used, the effect of rectification is exhibited, but by arranging a plurality of sheets at a predetermined interval, the effect of rectification is further enhanced, and the role as a fluid rectifier can be sufficiently fulfilled. Further, a large number of through holes 2 may be formed in the straightening vane 1, but if the positions of the through holes 2 are made uniform, the fluid does not become unbalanced depending on the place. Further, the number of through holes is increased or decreased according to the flow rate of the fluid, and the diameter and height of the through holes are adjusted according to the viscosity of the fluid. For example, if the flow rate is high,
Increase the number of through holes. If the viscosity is high, increase the diameter of the through holes or decrease the height.

【０００９】次に、このように構成する流体整流器５の
作用例を説明する。整流板１では、入口３から出口４に
向かい流れる順方向の場合、通孔２の壁面に沿って流体
が流れるため、流体自体の衝突摩擦が少なく流体抵抗が
低くなる。出口４から入口３に向かい流れる逆方向の場
合は通孔の出口４に流体が集中して流れるため流体自体
の衝突摩擦により流体抵抗が高くなる（図５）。流体の
流圧が増加した場合、流体は乱流状態となり流体抵抗が
著しく増加することが知られている。本発明においても
この効果が見られる。即ち、順方向および逆方向に同等
に高い流体圧力がかかった場合、順方向は層流を成し、
逆方向は図６上斜線を付した乱流部１０に、微小な渦流
が多数発生する乱流状態となる。乱流の発生は流体抵抗
が高いほど顕著であり、この様な条件時に順方向と逆方
向の流量差が最大となり、整流効果が最大になる（図
６）。従って、流体は入口３から出口４に向かい流れる
順方向流量に対し、逆方向流量が極めて少なく、実質上
流体を整流したことになる。流体整流器５は、このよう
な整流板１を複数枚配列したので、配管の途中に設ける
と流体の逆流が確実に防止できる。Next, an example of the operation of the fluid rectifier 5 thus constructed will be described. In the straightening vane 1, in the case of the forward direction in which the fluid flows from the inlet 3 toward the outlet 4, the fluid flows along the wall surface of the through hole 2, so that the collision friction of the fluid itself is small and the fluid resistance is low. In the case of the opposite direction in which the fluid flows from the outlet 4 toward the inlet 3, the fluid flows concentratedly at the outlet 4 of the through hole, and the fluid resistance increases due to the collision friction of the fluid itself (FIG. 5). It is known that when the fluid pressure of the fluid increases, the fluid becomes turbulent and the fluid resistance significantly increases. This effect is also seen in the present invention. That is, when equally high fluid pressure is applied in the forward and reverse directions, the forward direction forms a laminar flow,
In the opposite direction, a turbulent flow state in which a large number of minute eddy currents are generated in the turbulent flow section 10 with diagonal lines in FIG. The turbulent flow is more remarkable as the fluid resistance is higher, and the flow difference between the forward direction and the reverse direction is maximized under such conditions, and the rectification effect is maximized (FIG. 6). Therefore, the fluid has a very small reverse flow rate with respect to the forward flow rate flowing from the inlet 3 to the outlet 4, which means that the fluid is substantially rectified. Since the fluid rectifier 5 has a plurality of such rectification plates 1 arranged, if it is provided in the middle of the pipe, the reverse flow of the fluid can be reliably prevented.

【００１０】図４は、本発明の流体整流器５をプリンタ
装置のインクジェット装置に取付けた状態の図である。
このインクジェット装置は、インク容器８に溜めたイン
クを流体整流器５を介して先端部分に送り、この先端部
分にインクを飛び出させるために圧力を加える装置９が
設けてある。圧力を加える装置９は、弾性を有する管を
圧電セラミックス等で押圧することによりインクが飛び
出すものである。この圧力によりインクが飛び出すこと
の反作用としてインクの逆流が生じることがある。しか
し、途中に本発明流体整流器５を設けることで、この逆
流しようとするインクは、逆流を阻止されることにな
る。FIG. 4 is a view showing a state in which the fluid rectifier 5 of the present invention is attached to an ink jet device of a printer device.
This ink jet device is provided with a device 9 that sends ink stored in an ink container 8 to a tip portion via a fluid rectifier 5 and applies pressure to the tip portion to eject the ink. The pressure applying device 9 ejects ink by pressing an elastic tube with piezoelectric ceramics or the like. This pressure may cause a backflow of the ink as a reaction to the ejection of the ink. However, by providing the fluid rectifier 5 of the present invention on the way, the ink which is about to flow back is blocked from flowing back.

【００１１】[0011]

【発明の効果】本発明は上記の如く、整流板に多数の通
孔を穿設し、各通孔は整流板の表側の入口より裏側の出
口に向けその径を次第に狭く形成し、しかして、前記整
流板を流体が流れる流体供給管内に表裏の向きを揃えて
複数枚配列したので、別に開閉手段などを設ける必要な
く確実に逆流を防止することができ、製造が容易で、超
小型のものに設置しやすい。また、開閉手段を有する弁
体などの可動部がないので、可動部の摩耗や破損等の故
障が少なく、特別なメンテナンスがいらないという効果
を奏する。As described above, according to the present invention, a large number of through holes are formed in the straightening vane, and the diameter of each through hole is gradually narrowed from the front inlet to the rear outlet of the straightening vane. Since a plurality of the flow straightening plates are arranged in the fluid supply pipe in which the fluid flows with the front and back facing in the same direction, it is possible to reliably prevent backflow without the need to separately provide an opening / closing means, etc. Easy to install on things. Further, since there is no movable part such as a valve body having an opening / closing means, there are few malfunctions such as abrasion and damage of the movable part, and special maintenance is not required.

【図面の簡単な説明】[Brief description of drawings]

【図１】流体整流器を構成する整流板の斜視図である。FIG. 1 is a perspective view of a rectifying plate that constitutes a fluid rectifier.

【図２】図１の要部の拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.

【図３】本発明の流体整流器の部分断面図である。FIG. 3 is a partial cross-sectional view of the fluid rectifier of the present invention.

【図４】本発明の流体整流器をインクジェットに取付け
た状態の概略図である。FIG. 4 is a schematic view of a state in which the fluid rectifier of the present invention is attached to an inkjet.

【図５】流体抵抗が低い場合の整流板を通過する流体の
状態を示す概略図である。FIG. 5 is a schematic view showing a state of a fluid passing through the flow straightening plate when the fluid resistance is low.

【図６】流体抵抗が高い場合の整流板を通過する流体の
状態を示す概略図である。FIG. 6 is a schematic view showing a state of a fluid passing through the flow straightening plate when the fluid resistance is high.

【符号の説明】[Explanation of symbols]

１整流板２通孔３通孔の入口４通孔の出口５流体整流器６流体供給管 1 straightening plate 2 through hole 3 through hole inlet 4 through hole outlet 5 fluid rectifier 6 fluid supply pipe

Claims

【特許請求の範囲】[Claims]

【請求項１】整流板に多数の通孔を穿設し、各通孔は整流板の表側の入口より裏側の出口に向けその
径を次第に狭く形成し、しかして、前記整流板を流体が流れる流体供給管内に表
裏の向きを揃えて複数枚配列してなることを特徴とする
流体整流器。1. A rectifying plate is provided with a large number of through holes, and each of the through holes is formed such that its diameter is gradually narrowed toward an outlet on the back side from an inlet on the front side of the rectifying plate. A fluid rectifier, characterized in that a plurality of fluid rectifiers are arranged in the flowing fluid supply pipe so that the front and back sides are aligned.