CN102526871A - One-way positive pressure valve - Google Patents
One-way positive pressure valve Download PDFInfo
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- CN102526871A CN102526871A CN2010105851952A CN201010585195A CN102526871A CN 102526871 A CN102526871 A CN 102526871A CN 2010105851952 A CN2010105851952 A CN 2010105851952A CN 201010585195 A CN201010585195 A CN 201010585195A CN 102526871 A CN102526871 A CN 102526871A
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- valve
- plunger
- liquid
- valve seat
- unidirectional positive
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Abstract
The invention discloses a one-way positive pressure valve, which comprises a valve shell, a valve seat, a plunger and an elastomer element, wherein the valve shell is sleeved on the valve seat, and is hermetically connected with the valve seat; the upper end of the valve shell is provided with a liquid inlet; the lower end of the valve seat is provided with a liquid outlet; a liquid channel is formed between the liquid inlet and the liquid outlet; the top of the valve seat is provided with a cavity; the elastomer element is supported on the bottom wall of the cavity, and is used for providing resilience force rebounding towards the liquid inlet for the plunger positioned above; plunger side walls close to the upper end and the lower end of the plunger are provided with an upper annular bump and a lower annular bump respectively; the lower annular bump is sealed with the side wall of the cavity in a matching way; and both the plunger and the elastomer element are made of silica gel or thermoplastic elastomers. When the one-way positive pressure valve is closed, a positive pressure for pushing a liquid medicament in the valve towards the liquid outlet can be produced, so that the liquid medicament is prevented from flowing back, and even backflow of blood is prevented. Moreover, the one-way positive pressure valve is convenient to manufacture and assemble.
Description
Technical field
The present invention relates to cooperate clinically transfusion catheter and syringe to use, can prevent that medicinal liquid from refluxing and the unidirectional positive valve of blood back.
Background technology
At present, in the time of in the venous transfusion therapeutic process, need infusing prolonged and repeatedly or inject, multiselect be with venous detaining needle or inlying catheter.Usually connect the threeway conduit on these venous detaining needles or the inlying catheter, be furnished with standard luer (Luer) joint or calparine cap on the threeway conduit usually, to satisfy the clinical requirement of multiple transfusion.But there is certain defective in above-mentioned medical apparatus and instruments in clinical use: the use of female luer on the tee T, and need carry out partly sterilised at every turn, and will use entry needle to puncture, so just increase work load and operational risk to medical and nursing work; The use of calparine cap then needs medical personnel after the filling medicinal liquid, and injection heparin or normal saline carry out tube sealing in calparine cap, prevents that blood coagulation from forming thrombosis, and this brings burden to clinical manipulation equally.In addition, the application of calparine cap also might cause little air to get into blood circulation, has risk.
Simultaneously, above-mentioned two kinds of apparatuses all can't solve after transfusion accomplishes, because the negative pressure that produces when drawing back entry needle or not having needle adapter causes blood of human body to pass back into the indwelling flexible pipe, blood coagulation is blocked needle tubing, stop transfusion next time and the serious potential safety hazard that produces.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of unidirectional positive valve, and it produces the unidirectional normal pressure that prevents medicinal liquid backflow even blood back by valve itself after accomplishing transfusion, and this unidirectional positive valve is convenient to make and assembling.
The technical scheme that the present invention adopted is: a kind of unidirectional positive valve comprises valve casing, valve seat, plunger and elastomer element; Valve casing is set on the valve seat, and is connected with this valve base sealing; The upper end of valve casing is provided with the liquid inlet, and the lower end of valve seat is provided with liquid outlet, is provided with fluid passage between liquid inlet and the liquid outlet; The top of valve seat is provided with a chamber, and elastomer element is supported on the diapire of this chamber, and to the plunger that is positioned at this elastomer element top one resilience force to liquid inlet direction resilience is provided; Be respectively equipped with ring sealing part and following ring sealing part, the sidewall fitted seal of following ring sealing part and chamber on the plunger sidewall near this plunger upper end and plunger lower end; When unidirectional positive valve was in closed condition, plunger was closed and the seal fluid inlet; When check valve was in opening, the liquid that flows into from the liquid inlet was through the outlet of fluid passage influent.
Above-mentioned unidirectional positive valve, wherein, elastomer element comprises a body, the both sides of this body are respectively equipped with several grooves interlacedly.
Above-mentioned unidirectional positive valve, wherein, the last ring sealing part of plunger is the annular protrusion that is arranged on the plunger side with following ring sealing part.
Above-mentioned unidirectional positive valve, wherein, the material of plunger and elastomer element is silica gel or thermoplastic elastomer (TPE).
Advantage of the present invention is:
1. unidirectional positive valve of the present invention can produce the normal pressure that the valve inner liquid medicine is promoted to liquid outlet when cutting out, thereby prevents that medicinal liquid from refluxing even blood back.Therefore, when unidirectional positive valve of the present invention accomplish to screw out syringe, transfusion device etc. in transfusion, can avoid causing medicinal liquid to reflux even blood is back to the phenomenon of veins indwelling catheter because of producing negative pressure.And the present invention adopts the needleless operation, has ensured medical personnel's safety, has improved medical and nursing work efficient, has alleviated less patient suffering.
2. the present invention only is made up of four parts, can realize automatic assembling, thereby improve production efficiency.The ring sealing part that is arranged on the plunger sidewall is protruding with the integrated ring packing of plunger, does not need to use sealing ring in addition, has simplified production and assembly process.The shaped design of elastomer element is applicable to and adopts traditional elastomer manufacturing process (elastomeric processes) to make.
3. plunger of the present invention and elastomer element can adopt through chemical action bonded (chemically-bonded) lubricant; Guarantee smooth and reliable operation, avoided simultaneously causing lubricant to be injected into the device and even the intravital phenomenon of sufferer in these unidirectional positive valve downstream as lubricant owing to materials such as using silicone oil.
4. plunger of the present invention and elastomer element adopt silica gel or thermoplastic elastomer (TPE) manufacturing, are convenient to combine the antibacterial material to use together.In addition, in the present invention, substituted metal spring, made the present invention be suitable for using the occasion of MRI with elastomer element.
5. the end face of plunger adopts inclined design, is positioned on the valve casing inwall of below, liquid inlet equally spaced to be provided with many grooves that extend vertically, and the bottom of valve seat is provided with valve seat through-hole, all can play the effect that improves liquid flow properties.
Description of drawings
Fig. 1 is the perspective exploded view of unidirectional positive valve according to an embodiment of the invention.
Fig. 2 is the generalized section of the valve casing of the unidirectional positive valve of the present invention.
Fig. 3 is the sketch map of the plunger of unidirectional positive valve according to an embodiment of the invention.
Fig. 4 is the elastomeric sketch map of unidirectional positive valve according to an embodiment of the invention.
Fig. 5 is the sketch map of the valve seat of unidirectional positive valve according to an embodiment of the invention.
Fig. 6 is the perspective exploded view of unidirectional positive valve according to another embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As shown in Figure 1, unidirectional positive valve of the present invention is made up of valve casing 1, plunger 2, elastomer element 3 (elastomeric component) and valve seat 4.Valve casing 1 is set on the valve seat 4, and is tightly connected with this valve seat 4.The upper end of valve casing 1 is provided with liquid inlet 13, and the lower end of valve seat 4 is provided with liquid outlet 43, has fluid passage between liquid inlet 13 and the liquid outlet 43.Preferably, the upper end of liquid inlet 13 is provided with standard luer joint 15, and the lower end of valve seat 4 also is provided with standard luer joint 45 (see figure 5)s.The joint of other standard configurations also can be made in the lower end of the upper end of this liquid inlet 13 and valve seat 4.
In conjunction with shown in Figure 2, be positioned at and equally spaced be provided with many grooves 14 that extend vertically on the valve casing inwall of 13 belows, liquid inlet, can play the effect that improves liquid flow properties.
As shown in Figure 3, the end face 21 of plunger 2 is the inclined-plane.On plunger sidewall, be respectively equipped with ring sealing part 22 and following ring sealing part 24 near this plunger upper end and plunger lower end.Preferably, on this ring sealing part 22 and following ring sealing part 24 be arranged on the plunger side, and the integrated annular protrusion of this plunger.
As shown in Figure 4, elastomer element 3 comprises a body 30, and the both sides of said body 30 are respectively equipped with several grooves 31 interlacedly.When elastomer element was compressed, groove 31 was squeezed, and the space of groove 31 diminishes, thereby can significantly reduce the effective volume of elastomer element.
In conjunction with shown in Figure 5, the top of valve seat 4 is provided with a chamber 41, and elastomer element 3 is supported on the diapire 411 of this chamber 41, and to the plunger 2 that is positioned at this elastomer element top a resilience force to liquid inlet 13 direction resiliences is provided.The following ring sealing part 24 of plunger 2 and sidewall 412 fitted seal of chamber 41.The bottom of valve seat 4 is provided with valve seat through-hole 42, and valve seat through-hole 42 is arranged between fluid passage and the liquid outlet 43 and with fluid passage and liquid outlet 43 and is connected, from the effusive liquid of fluid passage through valve seat through-hole 42 influents outlet 43.
When unidirectional positive valve is in closed condition, the last ring sealing part 22 of plunger 2 and the inwall fitted seal of liquid inlet 13, thus realized closing and seal fluid inlet 13.
When unidirectional positive valve was in opening, the end face 21 of plunger was pushed by external female luer, and plunger 2 transfers the pressure on the elastomer element 3; Cause elastomer element 3 distortion, thereby ring sealing part 22 is dropped under the liquid inlet 13, medicinal liquid is 13 inputs from the liquid inlet; Flow through fluid passage in the valve; Get into valve seat through-hole 42, flow in other conduit of inlying catheter that links to each other with valve seat 4 from liquid outlet 43 then, accomplish the process of clinical transfusion.
When external female luer was closed unidirectional positive valve by back-out, elastomer element 3 reinstatements produced resilience force, promote the position that plunger 2 moves to closed condition.At this moment; It is big that the volume of plunger 2 and elastomer element 3 becomes; The volume of flow path of the liquid diminishes, because the volume-variation of flow path of the liquid produces the normal pressure that liquid residual in the valve is promoted to medicine liquid outlet; Make residual medicinal liquid continue to enter in the valve seat collection hole 42, flow out from liquid outlet 43 then through fluid passage.That is, make the residual liquor in the valve, continue to flow, thereby avoided medicinal liquid because the caused medicinal liquid of negative pressure that produces when screwing out external female luer refluxes even blood refluxes along former flow direction.
Fig. 6 shows another embodiment of the present invention.Wherein, valve casing 1 is made up of valve casing body 11 and arm 12, and liquid inlet 13 is arranged on the upper end of valve casing body 11.Arm 12 is arranged on the side of valve casing body 11 obliquely, and is communicated with valve casing body 11.From the liquid inlet 13 and the liquid that flows into of arm 12 all can export 43 through the fluid passage influent, thereby can carry out the transfusion of various liquid simultaneously.In Fig. 6, only show an arm, also can in the side of valve casing body 11 a plurality of arms be set according to the requirement of transfusion.
In the present invention, plunger 2 and elastomer element 3 all can be made by chemically inert elastomeric material (chemically-inert elastomers).Preferably, the material of plunger 2 and elastomer element 3 is silica gel or thermoplastic elastomer (TPE) (TPE).
The description of this embodiment has combined certain embodiments, but it should be understood by one skilled in the art that the present invention is not limited to embodiment described here, and can carry out various modifications and variation and do not deviate from the spirit and scope of the present invention.
Claims (9)
1. a unidirectional positive valve is characterized in that, comprises valve casing, valve seat, plunger and elastomer element; Said valve casing is set on the said valve seat, and is connected with this valve base sealing; The upper end of valve casing is provided with the liquid inlet, and the lower end of valve seat is provided with liquid outlet, is provided with fluid passage between said liquid inlet and the liquid outlet; The top of said valve seat is provided with a chamber, and said elastomer element is supported on the diapire of this chamber, and to the said plunger that is positioned at this elastomer element top one resilience force to the direction resilience of said liquid inlet is provided; Be respectively equipped with ring sealing part and following ring sealing part on the plunger sidewall near this plunger upper end and plunger lower end, the sidewall fitted seal of said ring sealing part down and said chamber; When said unidirectional positive valve was in closed condition, said plunger was closed and the seal fluid inlet; When said check valve was in opening, the liquid that flows into from the liquid inlet was through said fluid passage influent outlet.
2. unidirectional positive valve as claimed in claim 1 is characterized in that said elastomer element comprises a body, and the both sides of said body are respectively equipped with several grooves interlacedly.
3. unidirectional positive valve as claimed in claim 2 is characterized in that, the material of said elastomer element is silica gel or thermoplastic elastomer (TPE).
4. like claim 1 or 3 described unidirectional positive valves, it is characterized in that the said ring sealing part of going up is the annular protrusion that is arranged on the plunger side with following ring sealing part.
5. unidirectional positive valve as claimed in claim 4 is characterized in that, the material of said plunger is silica gel or thermoplastic elastomer (TPE).
6. unidirectional positive valve as claimed in claim 5 is characterized in that, the end face of said plunger is the inclined-plane.
7. unidirectional positive valve as claimed in claim 1 is characterized in that, is positioned on the valve casing inwall of below, said liquid inlet equally spaced to be provided with many grooves that extend vertically.
8. unidirectional positive valve as claimed in claim 1; It is characterized in that; The bottom of said valve seat is provided with valve seat through-hole; Said valve seat through-hole is arranged between said fluid passage and the said liquid outlet and with fluid passage and liquid outlet and is connected, from the effusive liquid of said fluid passage through the outlet of valve seat through-hole influent.
9. unidirectional positive valve as claimed in claim 1 is characterized in that said valve casing is made up of valve casing body and arm, and said liquid inlet is arranged on the upper end of said valve casing body; Said arm is arranged on the side of said valve casing body obliquely, and is communicated with the valve casing body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105851952A CN102526871A (en) | 2010-12-13 | 2010-12-13 | One-way positive pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105851952A CN102526871A (en) | 2010-12-13 | 2010-12-13 | One-way positive pressure valve |
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| Publication Number | Publication Date |
|---|---|
| CN102526871A true CN102526871A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105851952A Pending CN102526871A (en) | 2010-12-13 | 2010-12-13 | One-way positive pressure valve |
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| CN (1) | CN102526871A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103656780A (en) * | 2012-09-11 | 2014-03-26 | 郑州昊能科技有限公司 | Novel disposable venous transfusion double-direction positive pressure and negative pressure cut-off negative pressure conducting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201088780Y (en) * | 2007-09-05 | 2008-07-23 | Amsino医疗集团控股有限公司 | Unidirectional positive pressure valve |
| CN201179271Y (en) * | 2008-01-31 | 2009-01-14 | Amsino医疗集团控股有限公司 | One-way positive pressure valve |
| CN201996980U (en) * | 2010-12-13 | 2011-10-05 | 美舒医疗器械贸易(上海)有限公司 | Positive-pressure one-way valve |
-
2010
- 2010-12-13 CN CN2010105851952A patent/CN102526871A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201088780Y (en) * | 2007-09-05 | 2008-07-23 | Amsino医疗集团控股有限公司 | Unidirectional positive pressure valve |
| CN201179271Y (en) * | 2008-01-31 | 2009-01-14 | Amsino医疗集团控股有限公司 | One-way positive pressure valve |
| CN201996980U (en) * | 2010-12-13 | 2011-10-05 | 美舒医疗器械贸易(上海)有限公司 | Positive-pressure one-way valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103656780A (en) * | 2012-09-11 | 2014-03-26 | 郑州昊能科技有限公司 | Novel disposable venous transfusion double-direction positive pressure and negative pressure cut-off negative pressure conducting device |
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Application publication date: 20120704 |