JPH0131821Y2 - - Google Patents
Info
- Publication number
- JPH0131821Y2 JPH0131821Y2 JP17299184U JP17299184U JPH0131821Y2 JP H0131821 Y2 JPH0131821 Y2 JP H0131821Y2 JP 17299184 U JP17299184 U JP 17299184U JP 17299184 U JP17299184 U JP 17299184U JP H0131821 Y2 JPH0131821 Y2 JP H0131821Y2
- Authority
- JP
- Japan
- Prior art keywords
- backflow prevention
- prevention membrane
- outer tube
- tube
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002265 prevention Effects 0.000 claims description 32
- 239000012528 membrane Substances 0.000 claims description 24
- 239000012530 fluid Substances 0.000 description 12
- 239000011521 glass Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、圧力差のある装置、機器における逆
流防止装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a backflow prevention device for devices and equipment with pressure differences.
［従来の技術］
従来、加圧、減圧下で反応、蒸留等を行う装
置、機器において事故等による該装置、機器内の
気体あるいは液体（以下流体という）の逆流を防
止する方法として電磁弁、可動弁が用いられてい
た。[Prior Art] Conventionally, electromagnetic valves, A movable valve was used.
［考案の解決しようとする問題点］
電磁弁は確実に作動し、逆流防止が効率よく行
われるが、高価であり、取付けが煩雑であるので
実験用の装置には不向きである。[Problems to be solved by the invention] Although the solenoid valve operates reliably and efficiently prevents backflow, it is expensive and requires complicated installation, making it unsuitable for experimental equipment.
又第２図に示す従来の簡易型逆流防止装置は安
価で取付けは容易ではあるが、可動弁８と可動弁
受け９の接触部分の一部にキズあるいはチリの付
着が生じた場合逆流防止能の低下が起り易すかつ
た。 Furthermore, although the conventional simple backflow prevention device shown in FIG. 2 is inexpensive and easy to install, its ability to prevent backflow may deteriorate if scratches or dirt adhere to a part of the contact area between the movable valve 8 and the movable valve receiver 9. It was easy for this to occur.
［問題を解決しようとする手段］
本考案は流入用細管の端縁を逆流防止膜受けと
し、可撓性に富んだ逆流防止膜が貼設された逆流
防止膜支持体が圧力差により摺動して前記流入用
細管の端縁に密着し流体の逆流を防止するもので
ある。[Means for solving the problem] The present invention uses the end edge of the inflow tube as a backflow prevention membrane holder, and the backflow prevention membrane support to which a highly flexible backflow prevention membrane is attached slides due to the pressure difference. The tube is in close contact with the edge of the inflow tube to prevent backflow of fluid.
［作用］
以下本考案の一実施例を示す図面に基づいて説
明する。[Operation] An embodiment of the present invention will be described below based on the drawings.
第１図において、金属、プラスチツク、ガラス
等よりなる外管５の一端に金属、プラスチツク、
ガラス等よりなる流入用細管６が深く插入され、
他端には流出用細管７が取付けられている。前記
外管５内に逆流防止膜１の貼設された逆流防止膜
支持体２が具備されている。 In FIG. 1, one end of an outer tube 5 made of metal, plastic, glass, etc.
A thin inflow tube 6 made of glass or the like is inserted deeply,
A thin tube 7 for outflow is attached to the other end. A backflow prevention membrane support 2 on which a backflow prevention membrane 1 is attached is provided inside the outer tube 5.
逆流防止膜１は管内を流れる流体に侵されず、
逆流時の衝撃に耐え得る可撓性のあるフイルム、
シートであれば何でもよいが、例えば、軟質ポリ
塩化ビニル、ポリエチレン、ポリブタジエン、エ
チレン−酢酸ビニル等よりなるフイルム、シート
が好ましい。又逆流防止膜支持体２の材質は金
属、ガラス、プラスチツク等特に限定されないが
圧力差により外管内を摺動するので軽く、管内を
流れる流体に侵されないものが好ましい。次に前
記逆流防止膜１の貼設された逆流防止膜支持体２
は外管５内を流体の流れに従つて摺動できるよう
になつているので、事故等により圧力差を生ぜし
めている動力が断ち切られて流体が逆流し始める
と前記逆流防止膜支持体が流入用細管６の方へ摺
動して逆流防止膜１が前記流入用細管６の端縁で
ある逆流防止膜受け３に当り流体の逆流を防止す
る。逆流防止膜支持体は摺動する際外管内で転倒
しない程度の長さを有する円筒体が好ましい。又
外管５に設けられた逆流防止膜支持体止め４は外
管５から内側へ突き出た数個の突起であつて、本
考案の逆流防止装置を組込んだ装置、機器が正常
に作動している時は、流体が円滑に流れるように
逆流防止膜支持体と外管５とが密着するのを防止
するためのものである。 The backflow prevention membrane 1 is not affected by the fluid flowing inside the pipe,
A flexible film that can withstand shock during backflow.
Any sheet may be used, but for example, films and sheets made of soft polyvinyl chloride, polyethylene, polybutadiene, ethylene-vinyl acetate, etc. are preferred. The material for the backflow prevention membrane support 2 is not particularly limited, such as metal, glass, plastic, etc., but since it slides inside the outer tube due to the pressure difference, it is preferably light and not corroded by the fluid flowing inside the tube. Next, the backflow prevention membrane support 2 on which the backflow prevention membrane 1 is attached
is designed to be able to slide inside the outer tube 5 according to the flow of fluid, so that when the power that causes the pressure difference is cut off due to an accident or the like and the fluid starts to flow backwards, the backflow prevention membrane support will stop flowing. The backflow prevention membrane 1 slides toward the inlet tube 6 and hits the backflow prevention membrane receiver 3, which is the edge of the inflow tube 6, to prevent fluid from flowing back. The backflow prevention membrane support is preferably a cylindrical body having a length that does not fall over within the outer tube when sliding. Also, the backflow prevention membrane support stoppers 4 provided on the outer tube 5 are several protrusions that protrude inward from the outer tube 5, and are designed to prevent devices and equipment incorporating the backflow prevention device of the present invention from operating properly. This is to prevent the backflow prevention membrane support and the outer tube 5 from coming into close contact with each other so that the fluid can flow smoothly.
［考案の効果］
以上述べた如く、圧力差のある装置、機器に本
考案の逆流防止装置を組込むと、前記装置、機器
が正常に作動しているときは流体が逆流防止装置
内を円滑に流れるが、停電、事故等でその圧力差
を生ぜしめている動力を断ち切られ、流体が逆流
し始めると逆流防止膜が流体の逆流する力で、逆
流防止膜受けに当たり、流入用細管へ流体が逆流
するのを停止させる。この場合、たとえ逆流防止
膜受けにキズがあつたり、ゴミが付着していても
逆流防止膜が可撓性に富んでいるため間隙が生じ
ることなく密着するので、流体の逆流を確実に防
止することができる。[Effect of the invention] As described above, when the backflow prevention device of the present invention is incorporated into a device or device that has a pressure difference, fluid can flow smoothly inside the backflow prevention device when the device or device is operating normally. However, if the power that causes the pressure difference is cut off due to a power outage, accident, etc., and the fluid begins to flow backwards, the backflow prevention membrane hits the backflow prevention membrane receiver due to the force of the fluid flowing backwards, causing the fluid to flow back into the inflow tube. stop doing that. In this case, even if the backflow prevention membrane holder is scratched or has dust attached to it, the backflow prevention membrane is highly flexible and will fit tightly without creating any gaps, reliably preventing fluid backflow. be able to.
又本考案の逆流防止装置は構造が簡単であるの
で安価でしかも取付けが容易であるため実験用機
器にも簡単に取付けられるものである。 Furthermore, the backflow prevention device of the present invention has a simple structure, so it is inexpensive, and it is easy to install, so it can be easily installed in experimental equipment.
第１図は本考案の逆流防止装置の断面図であ
り、第２図は従来の逆流防止装置の一例を示す断
面図である。
１……逆流防止膜、２……逆流防止膜支持体、
３……逆流防止膜受け、５……外管、６……流入
用細管、７……流出用細管。
FIG. 1 is a sectional view of the backflow prevention device of the present invention, and FIG. 2 is a sectional view showing an example of a conventional backflow prevention device. 1... Backflow prevention membrane, 2... Backflow prevention membrane support,
3... Backflow prevention membrane receiver, 5... Outer tube, 6... Thin tube for inflow, 7... Thin tube for outflow.
Claims (1)
には流出用細管が取付けられており、両細管間に
おける圧力差により摺動する如く端縁に逆流防止
膜の貼設された逆流防止膜支持体が前記外管内に
具備されていることを特徴とする逆流防止装置。 An inflow capillary is inserted deeply into one end of the outer tube, and an outflow capillary is attached to the other end, and a backflow prevention membrane is attached to the edge so that it slides due to the pressure difference between the two capillaries. A backflow prevention device characterized in that a membrane support is provided within the outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17299184U JPH0131821Y2 (en) | 1984-11-13 | 1984-11-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17299184U JPH0131821Y2 (en) | 1984-11-13 | 1984-11-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6187268U JPS6187268U (en) | 1986-06-07 |
| JPH0131821Y2 true JPH0131821Y2 (en) | 1989-09-29 |
Family
ID=30730651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17299184U Expired JPH0131821Y2 (en) | 1984-11-13 | 1984-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0131821Y2 (en) |
-
1984
- 1984-11-13 JP JP17299184U patent/JPH0131821Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6187268U (en) | 1986-06-07 |
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