JP2006061673A - Back-flow valve structure - Google Patents
Back-flow valve structure Download PDFInfo
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- JP2006061673A JP2006061673A JP2005071829A JP2005071829A JP2006061673A JP 2006061673 A JP2006061673 A JP 2006061673A JP 2005071829 A JP2005071829 A JP 2005071829A JP 2005071829 A JP2005071829 A JP 2005071829A JP 2006061673 A JP2006061673 A JP 2006061673A
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 80
- 239000012530 fluid Substances 0.000 claims abstract description 23
- 239000013013 elastic material Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 86
- 230000002265 prevention Effects 0.000 claims description 33
- 229920001971 elastomer Polymers 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 6
- 230000037361 pathway Effects 0.000 abstract 4
- 239000008280 blood Substances 0.000 description 11
- 210000004369 blood Anatomy 0.000 description 11
- 238000012360 testing method Methods 0.000 description 8
- 238000001802 infusion Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 241000405070 Percophidae Species 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003978 infusion fluid Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000008155 medical solution Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
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- Check Valves (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
本発明は逆流防止弁構造に関し、さらに詳しくは、本発明は、血液回路、輸液セット、輸血セットなどの医療用具、又、特に現行組み込まれていない採血管用針ないしホルダー部内において、採血時における逆流を防止する安全対策として、逆流防止弁を組み込むことを想定したものも含むものであり、液体および気体が流れる医療用具製品・工業製品などに好適な逆流防止弁構造に関する。 The present invention relates to a backflow prevention valve structure, and more particularly, the present invention relates to a backflow at the time of blood collection in a medical device such as a blood circuit, an infusion set, a blood transfusion set, or a needle or holder for blood collection tubes that are not currently incorporated. As a safety measure for preventing this problem, it is also intended to include a backflow prevention valve, and relates to a backflow prevention valve structure suitable for medical device products and industrial products through which liquid and gas flow.
従来、輸液や輸血などの治療を行なう場合、他の薬液を混注する操作が多用されている。この混注操作は、通常、輸液セットや輸血セットに設けられた混注部に、薬液を収納したシリンジの先端チップを直接接続して、または、この先端チップに取り付けた注射針を穿刺して行われる。混注操作において、これを行っていない場合、輸液や血液の逆流が起こり、輸液や血液が混注部からのリークする虞があるため、一般に、薬液の逆流を防ぐために逆流防止弁が使用されている。また、補液回路などにおいては、一方向に流し、逆流を防止する目的で逆流防止弁が使用されている。また最近、採血管用針においても、採血の手順を誤ると採取した血液の逆流が起こり、人体に好ましくない影響を及ぼすという報告がなされている。この恒久対策として逆流防止弁を組み入れることは、根本的解決の１つである。逆流防止弁としては、現在ダックビルタイプやアンブレラタイプのもの、ボール弁、フート弁等が知られているが、医療用具では一般的にダックビルタイプのものが多用されている。
しかしながら、上記従来の逆流防止弁は、いずれも液体や気体の逆流を完全には防止することが出来ない場合があり、また、個々の製品間にバラツキが出やすいという欠点を有している。また、ダックビルタイプ、アンブレラタイプ等の逆流防止弁は、圧力調整をすることができない場合が多いことも否定できないのが現状である。
However, none of the above-described conventional backflow prevention valves can completely prevent backflow of liquid or gas, and has a drawback that variations easily occur between individual products. Further, in the current situation, it is impossible to deny that the backflow prevention valves such as the duckbill type and the umbrella type cannot often adjust the pressure.
本発明は、如上の事情に鑑みてなされたもので、完全に逆流を防止することができ、かつ、従来タイプのものよりシンプルなもので圧力調整が不要な逆流防止弁構造を提供することを目的とする。 The present invention has been made in view of the above circumstances, and provides a backflow prevention valve structure that can completely prevent backflow and that is simpler than the conventional type and does not require pressure adjustment. Objective.
本発明の逆流防止弁構造は、上記の課題を解決するもので、上流側液体又は気体通路部と弁体収容部を有するハウジングと、このハウジングの弁体収容部に圧着収容されたゴム弾性材料製の弁体を含む構造体であって、前記上流側液体又は気体通路部は、前記ハウジング内に前記弁体に密接する位置まで突出して、この弁体により上流側液体又は気体通路が閉鎖されており、前記弁体には透孔が設けられており、前記上流側液体又は気体通路から下流側に向かう流体の圧により前記弁体が容易に変形して前記上流側液体又は気体通路が開放される。前記透孔を介して前記上流側液体又は気体通路と前記弁体の下流が流体連通するようにされてなることを特徴とする。ここで、弁体の下流側には、上流側液体又は気体通路が開放された時に、透孔を介して上流側液体又は気体通路と流体連通する下流側液体又は気体通路部を設けてもよい。 The backflow prevention valve structure of the present invention solves the above-described problem, and includes a housing having an upstream liquid or gas passage portion and a valve body housing portion, and a rubber elastic material accommodated in the valve body housing portion of the housing by pressure bonding. The upstream liquid or gas passage portion protrudes to a position in close contact with the valve body in the housing, and the upstream liquid or gas passage is closed by the valve body. The valve body is provided with a through hole, and the valve body is easily deformed by the pressure of fluid flowing from the upstream liquid or gas passage to the downstream side to open the upstream liquid or gas passage. Is done. The upstream liquid or gas passage is in fluid communication with the downstream of the valve body through the through hole. Here, on the downstream side of the valve body, when the upstream liquid or gas passage is opened, a downstream liquid or gas passage portion that is in fluid communication with the upstream liquid or gas passage through the through hole may be provided. .
弁体は、その周縁に弁体収容部への固定部を有する薄い円板状部材に形成され、上流側液体又は気体通路部の先端と密着して上流側液体又は気体通路を閉鎖する閉塞部と、この閉鎖部の外側に軸対称に設けられた複数の透孔を有するものであってもよく、この場合、閉塞部が凸面状または円錐状に形成されるとともに、透孔が該閉鎖部と固定部に隣接する円状に２個以上で形成されていて、閉鎖部が平面状に形成されるとともに、透孔が固定部に隣接して形成され、閉鎖部から固定部にかけての部分が同心円状に屈曲されてもよい。また、弁体は、その周縁に弁体収容部への固定部を有する薄膜状の部材に成形され、上流側液体又は気体通路部の先端と密接して上流側液体又は気体通路を閉鎖する閉鎖部と、該閉鎖部の外側に軸対称に設けられた複数の透孔を有するものであってもよい。この場合、閉鎖部が平面状に形成されるとともに、透孔が閉鎖部に隣接して軸対称に形成されていても、閉鎖部が凸面状または円錐状に形成されるとともに、透孔が閉鎖部に隣接して軸対称に形成されていてもよい。更に、本発明では、閉鎖部の上流側液体又は気体通路部の先端との接触面が、該通路の先端部に嵌合する嵌合部を有する逆流防止弁構造である。以上のように、一般的に本発明を記述したが、より一層の理解は、いくつかの特定の実施例を参照することによって得ることができる。これらの実施例は、本明細書に例示の目的のためにのみ提供されるものであり、他の旨が特定されない限り限定されるものではない。 The valve body is formed in a thin disk-like member having a fixed portion to the valve body housing portion at the periphery thereof, and is a closed portion that closely contacts the tip of the upstream liquid or gas passage portion and closes the upstream liquid or gas passage. And a plurality of through holes provided symmetrically on the outside of the closed portion. In this case, the closed portion is formed in a convex shape or a conical shape, and the through hole is formed in the closed portion. And two or more in a circular shape adjacent to the fixed portion, the closed portion is formed in a planar shape, the through hole is formed adjacent to the fixed portion, and the portion from the closed portion to the fixed portion is It may be bent concentrically. Further, the valve body is formed into a thin film-like member having a fixing portion to the valve body housing portion at the periphery thereof, and closes the upstream liquid or gas passage in close contact with the tip of the upstream liquid or gas passage portion. And a plurality of through holes provided axisymmetrically outside the closed portion. In this case, the closed portion is formed in a planar shape, and even if the through hole is formed axially symmetrically adjacent to the closed portion, the closed portion is formed in a convex shape or a conical shape, and the through hole is closed. It may be formed axisymmetrically adjacent to the part. Furthermore, in this invention, it is a backflow prevention valve structure which has a fitting part which a contact surface with the front-end | tip part of this channel | path has the contact surface with the front-end | tip of the liquid or gas channel | path part of a closing part. Although the present invention has been generally described as above, a better understanding can be obtained by reference to certain specific embodiments. These examples are provided herein for illustrative purposes only, and are not limited unless otherwise specified.
本発明の逆流防止弁構造は、上流側液体又は気体通路部の先端を弁体に密接させることより、上流側液体又は気体通路が閉鎖されており、上流側液体又は気体通路から下流側に向かう流体の圧により弁体が容易に変形して上流側液体又は気体通路が開放され、弁体に設けられた透孔を介して上流側液体又は気体通路と前記弁体の下流側が流体連通するようにされているため、上流側液体又は気体通路から下流側に向かう流体が途絶えると、弁体が上流側液体又は気体通路部の先端に密接し上流側液体又は気体通路が閉鎖される。また、下流側から上流側に向かう流体は、弁体を押してこれを益々強く上流側液体又は気体通路部の先端に密着させることになるので、流体圧の強弱に関係なく液体又は気体の逆流は確実に防止される。従って、本発明の逆流防止弁構造では、シンプルであるとともに圧力調整が不要である。更に本発明において、閉鎖部の上流側液体又は気体通路部の先端との接触面が、該通路の先端部に嵌合する嵌合部を有することによって通路内に、嵌合部が閉鎖部を傾くことなく誘導するので、通路を平均的に閉鎖し、閉鎖部がずれて流体が漏れるという事故がない。 In the backflow prevention valve structure of the present invention, the upstream liquid or gas passage is closed by bringing the tip of the upstream liquid or gas passage portion into close contact with the valve body, and the downstream liquid or gas passage is directed downstream. The valve body is easily deformed by the pressure of the fluid so that the upstream liquid or gas passage is opened, and the upstream liquid or gas passage and the downstream side of the valve body are in fluid communication via a through hole provided in the valve body. Therefore, when the fluid flowing downstream from the upstream liquid or gas passage is interrupted, the valve body is brought into close contact with the tip of the upstream liquid or gas passage portion and the upstream liquid or gas passage is closed. In addition, the fluid flowing from the downstream side to the upstream side pushes the valve body and tightly adheres it to the tip of the upstream-side liquid or gas passage portion, so that the backflow of the liquid or gas is not related to the strength of the fluid pressure. It is surely prevented. Therefore, the backflow prevention valve structure of the present invention is simple and does not require pressure adjustment. Furthermore, in the present invention, the contact surface with the tip of the upstream liquid or gas passage portion of the closing portion has a fitting portion that fits into the tip portion of the passage so that the fitting portion has the closing portion. Since guidance is performed without inclining, there is no accident that the passage is closed on average and the closed portion is displaced and fluid leaks.
上流側液体又は気体通路部と下流側液体又は気体通路部の間に弁体収容部を有するハウジングと、このハウジングの弁体収容部に圧着収容されたゴム弾性材料製の弁体からなる。上流側液体又は気体通路部は、ハウジング内に弁体に密接する位置まで突出しており、この弁体により上流側液体又は気体通路が閉鎖される。弁体には透孔が設けられており、上流側液体又は気体通路から下流側に向かう流体の圧により変形して上流側液体又は気体通路が開放され、弁体に設けられた透孔を介して上流側液体又は気体通路と弁体の下流側が流体連通する。 It comprises a housing having a valve body accommodating portion between the upstream liquid or gas passage portion and the downstream liquid or gas passage portion, and a valve body made of a rubber elastic material that is accommodated in the valve body accommodating portion of the housing. The upstream liquid or gas passage portion protrudes to a position in close contact with the valve body in the housing, and the upstream liquid or gas passage is closed by the valve body. The valve body is provided with a through hole, which is deformed by the pressure of the fluid flowing from the upstream liquid or gas passage to the downstream side to open the upstream liquid or gas passage, and through the through hole provided in the valve body. Thus, the upstream liquid or gas passage and the downstream side of the valve body are in fluid communication.
本発明の実施例１について図１〜図３を用いて説明する。
図１は、本発明における実施例１の弁体を有する逆流防止弁を示す断面図である。図２は、本発明に用いられる弁体の底面図である。（ａ）は２個の透孔を有する弁体を示す底面図であり、（ｂ）は４個の透孔を有する弁体を示す底面図である。図３は図２に示す弁体の（ａ）はＡ−Ａ線断面図であり、（ｂ）はＸ−Ｘ線断面図である。
実施例１の逆流防止弁の構造は、上流側液体又は気体通路部１１と下流側液体又は気体通路部１２の間に弁体収容部１３を有するハウジング１と、このハウジング１の弁体収容部１３に収容された弁体２からなる。
ハウジング１は、一般的にポリエチレンやポリプロピレン、ポリカーボーネイト、ポリ塩化ビニル、ＡＢＳ樹脂などの耐薬品性、かつ好ましくは透明なプラスチックで形成された容器である。上流側液体又は気体通路部１１と下流側液体又は気体通路部１２は両端の開口したパイプ状に形成されており、それぞれ上流側液体又は気体通路１１１と下流側液体又は気体通路１２１を有している。弁体収容部１３には弁体２が圧着収容されている。上流側液体又は気体通路部１１はハウジング１に突出してその先端１１２が弁体２に密接しており、この上流側液体又は気体通路部１１の先端１１２と弁体２の密接により、上流側液体又は気体通路１１１が弁体２で閉鎖されるようになっている。
弁体２は、一般に、ゴム状弾性材料の、たとえば医療用としては、イソプレンゴム、エラストマーゴム、シリコーンゴム、ウレタンゴム、工業用としては、シリコーンゴム、フロロシリコーンゴム、フッ素ゴム、エチレンプロピレンゴム、天然ゴム、ニトリルゴム、ヒドリンゴムなどで形成され、周縁に固定部２３を有する薄い円板状部材であり、中央部分には上流側液体又は気体通路部１１の先端１１２と密接する閉鎖部又は閉鎖部材２１が設けられ、この閉鎖部材２１に隣接して外側（固定部２３側）に軸対称に２個以上の円状の透孔２２が設けられている。
固定部２３は、弁体収容部１３への固定部分であり、弁体収容部１３の形状に合わせて円環状に形成されている。閉鎖部２１は上流側液体又は気体通路１１１の閉鎖性を良くするために、上流側液体又は気体通路部１１の先端１１２の形状に合わせて、上流側液体又は気体通路部１１の先端と密接する側（上流側）が凸面状に形成されている。閉鎖部２１上流側の形状は円錐状であっても平面であってもよく、また、閉鎖部２１の上流側液体又は気体通路１１１を閉鎖する突起を設けてもよい。
A first embodiment of the present invention will be described with reference to FIGS.
1 is a cross-sectional view showing a backflow prevention valve having a valve body according to a first embodiment of the present invention. FIG. 2 is a bottom view of the valve body used in the present invention. (A) is a bottom view which shows the valve body which has two through-holes, (b) is a bottom view which shows the valve body which has four through-holes. 3A is a sectional view taken along line AA of the valve body shown in FIG. 2, and FIG. 3B is a sectional view taken along line XX.
The structure of the backflow prevention valve of the first embodiment includes a housing 1 having a valve body housing portion 13 between an upstream liquid or gas passage portion 11 and a downstream liquid or gas passage portion 12, and a valve body housing portion of the housing 1. 13 comprises a valve body 2 accommodated in 13.
The housing 1 is generally a container made of a plastic that is resistant to chemicals such as polyethylene, polypropylene, polycarbonate, polyvinyl chloride, ABS resin, and preferably transparent. The upstream liquid or gas passage portion 11 and the downstream liquid or gas passage portion 12 are formed in a pipe shape having openings at both ends, and each has an upstream liquid or gas passage 111 and a downstream liquid or gas passage 121. Yes. The valve element 2 is accommodated in the valve element accommodating part 13 by pressure bonding. The upstream liquid or gas passage portion 11 protrudes from the housing 1 and its tip 112 is in close contact with the valve body 2. The upstream liquid or gas passage portion 11 is in close contact with the valve body 2 due to the close contact between the tip 112 of the upstream liquid or gas passage portion 11 and the valve body 2. Alternatively, the gas passage 111 is closed by the valve body 2.
The valve body 2 is generally made of a rubber-like elastic material, for example, isoprene rubber, elastomer rubber, silicone rubber, urethane rubber for medical use, and silicone rubber, fluorosilicone rubber, fluorine rubber, ethylene propylene rubber for industrial use, It is a thin disk-shaped member made of natural rubber, nitrile rubber, hydrin rubber, or the like, and has a fixing portion 23 on the periphery, and a closing portion or closing member that is in close contact with the tip 112 of the upstream liquid or gas passage portion 11 at the center portion 21 is provided, and two or more circular through holes 22 are provided axially symmetrically on the outside (on the fixed portion 23 side) adjacent to the closing member 21.
The fixing portion 23 is a fixed portion to the valve body housing portion 13 and is formed in an annular shape according to the shape of the valve body housing portion 13. In order to improve the closing property of the upstream liquid or gas passage 111, the closing portion 21 closely contacts the tip of the upstream liquid or gas passage portion 11 in accordance with the shape of the tip 112 of the upstream liquid or gas passage portion 11. The side (upstream side) is formed in a convex shape. The shape on the upstream side of the closing portion 21 may be conical or flat, and a protrusion for closing the upstream liquid or gas passage 111 of the closing portion 21 may be provided.
次に、本発明の実施例２について図４〜図６を用いて説明する。
図４は実施例１の弁体が図６の断面を示す位置における断面図であり、図５は図４に示す弁体の底面図、図６は図５のＸ−Ｘ線断面図である。
実施例２は、実施例１において、弁体２として、その周縁に弁体収容部１３への固定部２３を有する薄膜状の部材を採用し、閉鎖部２１の外側に軸対称に複数の透孔２２を設けたもので、閉鎖部２１の上流側は円錐状に形成されている。
Next, a second embodiment of the present invention will be described with reference to FIGS.
4 is a cross-sectional view of the valve body of Example 1 at a position showing the cross section of FIG. 6, FIG. 5 is a bottom view of the valve body shown in FIG. 4, and FIG. 6 is a cross-sectional view taken along line XX of FIG. .
The second embodiment employs a thin film-like member having a fixing portion 23 for the valve body housing portion 13 at the periphery thereof as the valve body 2 in the first embodiment, and a plurality of transparent materials are provided on the outer side of the closing portion 21 in an axially symmetrical manner. A hole 22 is provided, and the upstream side of the closing portion 21 is formed in a conical shape.
次に、本発明の実施例３について図７〜図９を用いて説明する。
図７は実施例３の弁体が図９の断面を示す位置における断面図であり、図８は図７に示す弁体の底面図、図９は図８のＸ−Ｘ線断図である。
実施例３は、実施例１において、弁体２として、その周縁に弁体収容部１３への固定部２３を有する薄い円板状部材を採用し、閉鎖部２１の外側に軸対称に複数の透孔２２を設けたもので、閉鎖部２１の上流側は平面状に形成され、閉鎖部２１から固定部２３にかけての部分が同心円状に屈曲されている。透孔２２は通常、屈曲部分に形成される。
Next, a third embodiment of the present invention will be described with reference to FIGS.
7 is a cross-sectional view of the valve body of Example 3 at a position showing the cross section of FIG. 9, FIG. 8 is a bottom view of the valve body shown in FIG. 7, and FIG. 9 is a cross-sectional view taken along line XX of FIG. .
The third embodiment employs a thin disk-shaped member having a fixing portion 23 to the valve body housing portion 13 on the periphery thereof as the valve body 2 in the first embodiment, and a plurality of axisymmetric outer sides of the closing portion 21. A through hole 22 is provided, and the upstream side of the closing portion 21 is formed in a flat shape, and a portion from the closing portion 21 to the fixing portion 23 is bent concentrically. The through hole 22 is usually formed in a bent portion.
次に、本発明の実施例４について図１０〜図１２を用いて説明する。
図１０は実施例４の弁体が図１２の断面を示す位置における断面図であり、図１１は図
１０に示す弁体の底面図、図１２は図１１のＸ−Ｘ線断面図である。
実施例４は、実施例１において、弁体２として、その周縁に弁体収容部１３への固定部２３を有する薄膜状の部材を採用し、閉鎖部２１の外側に軸対称に複数の透孔２２を設けたもので、閉鎖部２１の上流側は平面状に形成されている。更に図１４に示される弁体について説明する。本発明では、弁体の閉塞面、即ち上流側液体又は気体の通路部１１の先端部１１２との接触面２４の一部が嵌合部２５を形成しており、この嵌合部２５は、前記通路１１の先端部１１２から通路１１内に嵌合して閉鎖部材２１を正確に誘導して該閉鎖部材２１が傾いたり、ずれたりすることなく、均等に先端部１１２に接触する。これにより閉鎖部からの液体又は気体などの漏れがない。またこの嵌合部２５は、その形状が通路に嵌合した際、通路内面に対応した接触面を有すると共に、該接触面の一部に欠除部２６を有する。この欠除部２６を有する嵌合部２５の形状は、特に限定されるものではなく、三角形、四角形などの多角形状の形状が好ましい。
Next, Embodiment 4 of the present invention will be described with reference to FIGS.
10 is a cross-sectional view of the valve body of Example 4 at a position showing the cross section of FIG. 12, FIG. 11 is a bottom view of the valve body shown in FIG. 10, and FIG. 12 is a cross-sectional view taken along line XX of FIG. .
The fourth embodiment employs a thin film-like member having a fixing portion 23 to the valve body housing portion 13 at the periphery thereof as the valve body 2 in the first embodiment, and a plurality of transparent materials are provided axially symmetrically outside the closing portion 21. The hole 22 is provided, and the upstream side of the closing portion 21 is formed in a planar shape. Further, the valve body shown in FIG. 14 will be described. In the present invention, the closed surface of the valve body, that is, a part of the contact surface 24 with the distal end portion 112 of the upstream liquid or gas passage portion 11 forms a fitting portion 25, The closing member 21 is accurately guided by fitting into the passage 11 from the distal end portion 112 of the passage 11 so that the closing member 21 contacts the distal end portion 112 evenly without tilting or shifting. As a result, there is no leakage of liquid or gas from the closed part. The fitting portion 25 has a contact surface corresponding to the inner surface of the passage when the shape thereof is fitted to the passage, and a notch portion 26 in a part of the contact surface. The shape of the fitting portion 25 having the notched portion 26 is not particularly limited, and a polygonal shape such as a triangle or a quadrangle is preferable.
図１４のａは、四角形状の嵌合部２５ａを有する弁体を示す斜視図である。図１４のａにおいて、弁体２の中央部には、閉鎖部材２１が接続部材２０,２０によって接続されて位置している。この閉塞部材２１は、上流側液体又は気体通路部１１の先端１１２と接触乃至密接することができる。この閉鎖部材２１に隣接して外側（固定部２３側）に軸対称に２個以上の円状の透孔２２が、接続部材２０を介して設けられている。本発明の弁体２は、ハウジング１の弁体収容部１３に圧着収容される。ここで、上流側液体又は気体通路部１１はハウジング１内に弁体２に密接する位置まで突出しており、弁体２の閉鎖部２１によりその上流側液体又は気体通路１１１が閉鎖される。この際、閉鎖部２１の接触面２４に設けられた嵌合部２５ａは、下流側液体又は気体通路部１２の通路１２１から上流側に向かう流体の圧により嵌合部２５ａが通路内へ挿入され、通路の先端部１１２と前記接触面２４が密着することによって閉鎖される。また上流側液体又は気体通路１１１から下流側へ流体が移動する場合には、閉鎖部材２１に有する嵌合部２５ａが開放され、欠除部２６を通って流体が流れ、更に透孔２２を通って下流側へ流れる。
FIG. 14A is a perspective view showing a valve body having a rectangular fitting portion 25a. In FIG. 14 a, a closing member 21 is connected to the central portion of the valve body 2 by connecting members 20 and 20. The closing member 21 can be in contact with or in close contact with the tip 112 of the upstream liquid or gas passage portion 11. Two or more circular through-holes 22 are provided on the outer side (fixed portion 23 side) adjacent to the closing member 21 via the connecting member 20 in an axially symmetrical manner. The valve body 2 of the present invention is accommodated in the valve body accommodating portion 13 of the housing 1 by pressure bonding. Here, the upstream liquid or gas passage portion 11 protrudes to the position close to the valve body 2 in the housing 1, and the upstream liquid or gas passage 111 is closed by the closing portion 21 of the valve body 2. At this time, the fitting portion 25a provided on the contact surface 24 of the closing portion 21 is inserted into the passage by the pressure of the fluid flowing from the passage 121 of the downstream liquid or gas passage portion 12 toward the upstream side. The tip 112 of the passage and the contact surface 24 are in close contact with each other to close the passage. When the fluid moves from the upstream liquid or gas passage 111 to the downstream side, the fitting portion 25a of the closing member 21 is opened, the fluid flows through the notch portion 26, and further passes through the through hole 22. Flow downstream.
図１４のｂは、三角形状の嵌合部２５ｂを有する弁体を示す斜視図である。この弁体は、図１４のａに示される弁体において、嵌合部２５の形状を四角形状から三角形状に変えた点以外は、図１４のａに示される弁体と同じである。したがって、その弁体の作用効果は、図１４のａに示される弁体と同様に、閉鎖部２１の接触面２４に設けられた嵌合部２５ｂは、下流側液体又は気体通路部１２の通路１２１から上流側に向かう流体の圧により嵌合部２５ｂが通路内へ挿入され、通路の先端部１１２と前記接触面２４が密着することによって閉鎖される。また上流側液体又は気体通路１１１から下流側へ流体が移動する場合には、閉鎖部材２１に有する嵌合部２５ｂが開放され、欠除部２６を通って流体が流れ、更に透孔２２を通って下流側へ流れる。ここで、本発明に用いられる弁体２の嵌合部２５ｂは、ハウジング１に収納して用いる際、該嵌合部２５ｂは上流側液体又は気体通路部１１の通路１１１に嵌合する際,流体の圧により完全に外れて開放されても一部嵌合状態を維持していてもよい。 FIG. 14b is a perspective view showing a valve body having a triangular fitting portion 25b. This valve body is the same as the valve body shown in FIG. 14A except that the shape of the fitting portion 25 in the valve body shown in FIG. 14A is changed from a square shape to a triangular shape. Therefore, the effect of the valve body is the same as that of the valve body shown in FIG. 14 a, the fitting portion 25 b provided on the contact surface 24 of the closing portion 21 is a passage of the downstream liquid or gas passage portion 12. The fitting portion 25b is inserted into the passage by the pressure of the fluid from 121 toward the upstream side, and is closed when the distal end portion 112 of the passage and the contact surface 24 come into close contact with each other. When the fluid moves from the upstream liquid or gas passage 111 to the downstream side, the fitting portion 25b of the closing member 21 is opened, the fluid flows through the notched portion 26, and further passes through the through hole 22. Flow downstream. Here, when the fitting portion 25b of the valve body 2 used in the present invention is housed in the housing 1, the fitting portion 25b is fitted into the passage 111 of the upstream liquid or gas passage portion 11, Even if it is completely released and released by the pressure of the fluid, it may be partially engaged.
次に、本発明の実施例５について図１３を用いて説明する。図１３は実施例５の断面図である。
実施例５の逆流防止弁構造は、上流側液体又は気体通路部１１と弁体収容部１３を有するハウジング１と、このハウジング１の弁体収容部１３に圧着収容されたゴム弾性材料製の弁体２含む構造体であって、上流側液体又は気体通路部１１はハウジング１内に弁体２に密接する位置まで突出しており、弁体２によりその上流側液体又は気体通路１１１が閉鎖されている。弁体２には透孔２２が設けられており、上流側液体又は気体通路１１１から下流側に向かう流体の圧により弁体２が変形して上流側液体又は気体通路１１１が開放され、透孔２２を介して上流側液体又は気体通路１１１と弁体２の下流側が流体連通するようになっている。この逆流防止弁構造は、実施例１において下流側液体又は気体通路部１２を省略したものであり、例えば図１３に示すように、ハウジング１の下流側に設けたコネクター１４（突起部ないしネジ溝を設けたロック対応形状品）を輸液セットや輸血セットの主ルートに直接接続して使用することができる。また、これと同等の使用を有する工業用部品にも応用できることは、言うまでもない。
以下に、本発明の逆流防止弁の耐圧性能を調査した実施例について説明する。
Next, Embodiment 5 of the present invention will be described with reference to FIG. FIG. 13 is a cross-sectional view of the fifth embodiment.
The backflow prevention valve structure of the fifth embodiment includes a housing 1 having an upstream liquid or gas passage portion 11 and a valve body housing portion 13, and a valve made of a rubber elastic material that is accommodated in the valve body housing portion 13 of the housing 1 by pressure bonding. In the structure including the body 2, the upstream liquid or gas passage portion 11 protrudes to a position in close contact with the valve body 2 in the housing 1, and the upstream liquid or gas passage 111 is closed by the valve body 2. Yes. The valve body 2 is provided with a through hole 22, and the valve body 2 is deformed by the pressure of the fluid flowing from the upstream liquid or gas passage 111 to the downstream side to open the upstream liquid or gas passage 111, and the through hole The upstream liquid or gas passage 111 and the downstream side of the valve body 2 are in fluid communication via 22. This backflow prevention valve structure is obtained by omitting the downstream liquid or gas passage portion 12 in the first embodiment. For example, as shown in FIG. 13, a connector 14 (protrusion or screw groove) provided on the downstream side of the housing 1 is used. Can be used by directly connecting to the main route of the infusion set or transfusion set. Moreover, it cannot be overemphasized that it can apply also to the industrial component which has use equivalent to this.
Below, the Example which investigated the pressure | voltage resistant performance of the backflow prevention valve of this invention is described.
（イ）〔試験検体〕
１）現行製品 n＝１０（各ｎ＝５，計１０）
２）本発明品 n＝１０（各ｎ＝５，計１０）
（現行流動しているB社製品（弁体はダックビル構造）と本製品にて比較試験を行なった。）
（ロ）〔試験項目および試験方法〕
１)逆流防止弁の正方向からの各流量に対する圧力測定
試験方法：サンプル製品を血液ポンプに取り付けた回路上（陽圧側） に組み込み、流量５０、１００、１５０ｍｌ／minにて３７℃の水を循環させた 時の圧力を測定する。試験結果は、表１に示す。
（尚、実際に１例として使用される１９０ｍｌ／min前後、４００ｍｌ／min前後においても確認済みであり、今回の表は低流量での性能比較を示した。）
２）逆流防止弁の逆方向からの耐圧試験
試験方法：サンプル製品内を流れる方向とは逆の方向から、最大圧力３．０ｋ ｇｆ／ｃｍ２まで加圧し、エアー漏れが発生するか確認する。また、１度試験したサンプルについて同条件で再試験を行い、再度耐圧を調査した。試験結果は、表２に示す。
＜加圧条件＞
（Ｉ）０．５ｋｇｆ／ｃｍ２ ，１．０ｋｇｆ／ｃｍ２ ，
１．５ｋｇｆ／ｃｍ２ ・・・・３．０ｋｇｆ／ｃｍ２
（０．５ｋｇｆ／ｃｍ２ずつ圧力をＵＰ）
（ＩＩ）各圧力を５分間保持
（ハ）〔試験結果〕
1) Current product n = 10 (each n = 5, total 10)
2) Invention product n = 10 (each n = 5, total 10)
(Comparison test was performed with the current product of Company B (valve is duck bill structure) and this product.)
(B) [Test items and test methods]
1) Pressure measurement for each flow rate from the positive direction of the backflow prevention valve Measure the pressure when circulating. The test results are shown in Table 1.
(It has been confirmed at around 190 ml / min and around 400 ml / min that are actually used as an example, and this table shows a performance comparison at a low flow rate.)
2) Pressure resistance test from reverse direction of check valve
Test method: Pressurize to the maximum pressure of 3.0 kgf / cm 2 from the direction opposite to the direction in which the sample product flows, and confirm whether air leakage occurs. In addition, the sample tested once was retested under the same conditions, and the pressure resistance was investigated again. The test results are shown in Table 2.
<Pressurizing conditions>
(I) 0.5 kgf / cm 2 , 1.0 kgf / cm 2 ,
1.5 kgf / cm 2 ... 3.0 kgf / cm 2
(0.5kgf / cm 2 by the pressure UP)
(II) Hold each pressure for 5 minutes (c) [Test results]
（ニ）所見
１) 逆流防止弁の正方向からの各流量に対する圧力測定は、表１よりほぼ同等の機能。
２) 逆流防止弁の逆方向からの耐圧試験は表２より、本発明製品が逆流防止弁としての機能を確実なものとしている。（現行製品には、バラツキがある。）
(D) Findings
1) The pressure measurement for each flow rate from the forward direction of the check valve has almost the same function as Table 1.
2) From the pressure resistance test in the reverse direction of the backflow prevention valve, it is confirmed from Table 2 that the product of the present invention reliably functions as a backflow prevention valve. (Current products have variations.)
１ ハウジング
１１ 上流側液体又は気体通路部
１１１ 上流側液体又は気体通路
１１２ 先端
１２ 下流側液体又は気体通路部
１２１ 下流側液体又は気体通路
１３ 弁体収容部
１４ コネクター
２ 弁体
２０ 接続部材
２１ 閉鎖部
２２、３２ 透孔
２３ 固定部
２４ 接触面
２５ 嵌合部
２６ 欠除部
DESCRIPTION OF SYMBOLS 1 Housing 11 Upstream side liquid or gas passage part 111 Upstream side liquid or gas path 112 Tip 12 Downstream side liquid or gas path part 121 Downstream side liquid or gas path 13 Valve body accommodating part 14 Connector 2 Valve body 20 Connection member 21 Closure part 22, 32 Through-hole 23 Fixing part 24 Contact surface 25 Fitting part 26 Deletion part
Claims (9)
The backflow prevention valve structure according to any one of claims 1 to 8, wherein the contact surface of the closing portion with the tip of the liquid or gas passage portion has a fitting portion that fits into the tip portion of the passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005071829A JP2006061673A (en) | 2004-07-29 | 2005-03-14 | Back-flow valve structure |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004244437 | 2004-07-29 | ||
| JP2005071829A JP2006061673A (en) | 2004-07-29 | 2005-03-14 | Back-flow valve structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2006061673A true JP2006061673A (en) | 2006-03-09 |
Family
ID=36108622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005071829A Pending JP2006061673A (en) | 2004-07-29 | 2005-03-14 | Back-flow valve structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2006061673A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007250908A (en) * | 2006-03-16 | 2007-09-27 | Tokyo Seimitsu Co Ltd | Polishing head in CMP polishing apparatus |
| JP2011208792A (en) * | 2010-03-31 | 2011-10-20 | Murata Mfg Co Ltd | Valve driven by pressure difference and fuel cell system using the valve |
| JP2015090202A (en) * | 2013-11-07 | 2015-05-11 | イーエヌ大塚製薬株式会社 | Valve with packing, and valve unit |
| WO2015163343A1 (en) * | 2014-04-22 | 2015-10-29 | 株式会社ミマキエンジニアリング | Valve body, diaphragm valve, diaphragm pump and liquid feeding unit |
| JP2018535024A (en) * | 2015-11-25 | 2018-11-29 | バイエル・ヘルスケア・エルエルシーＢａｙｅｒ ＨｅａｌｔｈＣａｒｅ ＬＬＣ | Syringe filling adapter |
| CN114436195A (en) * | 2021-12-23 | 2022-05-06 | 广州侍美科技有限公司 | On-off valve and liquid sampling components |
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| JPH0196580U (en) * | 1987-12-18 | 1989-06-27 | ||
| JP2001012356A (en) * | 1999-06-23 | 2001-01-16 | Namiki Precision Jewel Co Ltd | Check valve structure and micropump using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0196580U (en) * | 1987-12-18 | 1989-06-27 | ||
| JP2001012356A (en) * | 1999-06-23 | 2001-01-16 | Namiki Precision Jewel Co Ltd | Check valve structure and micropump using the same |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007250908A (en) * | 2006-03-16 | 2007-09-27 | Tokyo Seimitsu Co Ltd | Polishing head in CMP polishing apparatus |
| JP2011208792A (en) * | 2010-03-31 | 2011-10-20 | Murata Mfg Co Ltd | Valve driven by pressure difference and fuel cell system using the valve |
| JP2015090202A (en) * | 2013-11-07 | 2015-05-11 | イーエヌ大塚製薬株式会社 | Valve with packing, and valve unit |
| WO2015163343A1 (en) * | 2014-04-22 | 2015-10-29 | 株式会社ミマキエンジニアリング | Valve body, diaphragm valve, diaphragm pump and liquid feeding unit |
| JP2015206324A (en) * | 2014-04-22 | 2015-11-19 | 株式会社ミマキエンジニアリング | Valve element, diaphragm valve, diaphragm pump and liquid-feed unit |
| JP2018535024A (en) * | 2015-11-25 | 2018-11-29 | バイエル・ヘルスケア・エルエルシーＢａｙｅｒ ＨｅａｌｔｈＣａｒｅ ＬＬＣ | Syringe filling adapter |
| US11007118B2 (en) | 2015-11-25 | 2021-05-18 | Bayer Healthcare Llc | Syringe fill adapter |
| US12263136B2 (en) | 2015-11-25 | 2025-04-01 | Bayer Healthcare Llc | Syringe fill adapter |
| CN114436195A (en) * | 2021-12-23 | 2022-05-06 | 广州侍美科技有限公司 | On-off valve and liquid sampling components |
| CN114436195B (en) * | 2021-12-23 | 2024-04-05 | 广州侍美科技有限公司 | On-off valve and liquid taking assembly |
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Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20100830 |