CN110292532A - Anti-free flow valve - Google Patents
Anti-free flow valve Download PDFInfo
- Publication number
- CN110292532A CN110292532A CN201810247588.9A CN201810247588A CN110292532A CN 110292532 A CN110292532 A CN 110292532A CN 201810247588 A CN201810247588 A CN 201810247588A CN 110292532 A CN110292532 A CN 110292532A
- Authority
- CN
- China
- Prior art keywords
- valve core
- entrance
- elastic valve
- elastic
- free flow
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000005086 pumping Methods 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000003381 stabilizer Substances 0.000 claims description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 claims 2
- 229920001971 elastomer Polymers 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000001802 infusion Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0026—Parts, details or accessories for feeding-tubes
- A61J15/0076—Feeding pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0026—Parts, details or accessories for feeding-tubes
- A61J15/0092—Valves on feeding tubes
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a kind of anti-free flow valves, comprising: valve casing, valve casing have valve chamber, entrance and exit；Entrance and exit is connected to valve chamber respectively；Elastic valve core, Elastic valve core are arranged in valve chamber, and have downwardly open cavity；Entrance is closing and sealing off at the top of Elastic valve core, the diameter of the lateral surface of Elastic valve core becomes larger from entrance to outlet, and the smooth no corner angle of lateral surface of Elastic valve core；When the liquid of pumping flows into entrance, under the action of fluid pressure flexible deformation can occur for Elastic valve core, and to open entrance, the liquid for flowing into entrance flows into outlet by the lateral surface of Elastic valve core；When the liquid of pumping stops flow into entrance, Elastic valve core automatic elastic can reset under the action of natural resiliency power, so that being closing and sealing off entrance at the top of Elastic valve core.The configuration of the present invention is simple, liquid flowing resistance are small, are not easy to plug.
Description
Technical field
The present invention relates to medical instrument more particularly to a kind of anti-free flow valves that can be used for feeding pump.
Background technique
Feeding pump is for providing nutrition and food to sufferer when sufferer cannot be fed due to various reasons.Feeding pump is main
Including shell, infusion tube set, pump machanism etc..Be connected to the infusion tube set of dropping funnel transfusion catheter pass through pump machanism to liquid
It takes turns and inserted into the patient by vein.Pressure can be applied to transfusion catheter to the roller on liquid wheel, to adjust liquid from storage
Amount and speed of the container transport to patient.It can be rotated by the motor driven of pump machanism to liquid wheel, to the quantity of the roller on liquid wheel
Usually three.
In existing feeding pump, the positioning groove that is typically fixed to the pipeline between liquid wheel and patient on shell
In, but this fixed form is less firm, is sliding from positioning groove in infusion process to the pipeline between liquid wheel and patient
De- event happens occasionally.When slipping to the pipeline between liquid wheel and patient, although pump machanism stops working, but can usually send out
The situation of raw free flow.At this point, into patient's body liquid only by GRAVITY CONTROL, will lead to a large amount of liquid compared with
It is input into patient's body in the short time, to induce malpractice, even results in the death of patient.
The generation of phenomenon is flowed freely in order to prevent, and existing a solution is to the pipe between liquid wheel and patient
Anti-free flow valve is set on road.Anti-free flow valve only can just be opened the liquid flow of pumping is fashionable, and work as pump machanism
When stopping working, even if there is feeding liquid to be flowed into anti-free flow valve, the pressure of liquid is also not enough to open anti-free flow
Valve thus prevents feeding liquid to flow freely.But existing anti-free flow valve there is structure is complicated, shunt muscle it is more,
Liquid flowing resistance is big, flow velocity is low, easy blocking, the disadvantages of manufacturing cost is high.
Summary of the invention
Technical problem to be solved by the present invention lies in providing, a kind of structure is simple, liquid flowing resistance is small, is not easy to plug
Anti-free flow valve.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of anti-free flow valve, comprising: valve casing, valve casing have valve chamber, entrance and exit；Entrance and exit connects with valve chamber respectively
It is logical；Elastic valve core, Elastic valve core are arranged in valve chamber, and have downwardly open cavity；The top closing of Elastic valve core is simultaneously close
Enclosed mouth, the diameter of the lateral surface of Elastic valve core becomes larger from entrance to outlet, and the smooth no rib of lateral surface of Elastic valve core
Angle；When the liquid of pumping flows into entrance, under the action of fluid pressure flexible deformation can occur for Elastic valve core, to open
Entrance, the liquid for flowing into entrance flow into outlet by the lateral surface of Elastic valve core；Entrance is stopped flow into the liquid of pumping
When interior, Elastic valve core can under the action of natural resiliency power automatic elastic reset so that Elastic valve core top close and it is close
Enclosed mouth.
After adopting the above technical scheme, the present invention has at least the following advantages and feature:
1. the diameter of the lateral surface of Elastic valve core of the invention becomes larger from entrance to outlet, and the smooth no corner angle of lateral surface,
Therefore the liquid for flowing into anti-free flow valve inlet is easy to flow into outlet, liquid flowing resistance by the lateral surface of Elastic valve core
Small, flow velocity is big；
2. feeding liquid stream through Elastic valve core lateral surface when, can be flowed down from surrounding is smooth, the dead angle flowed is difficult to there is no liquid
Region, feeding liquid will not be deposited in Elastic valve core surface, both avoid blocking fluid passage, also reduce and breed bacterium, cause
The risk of infection；
3. anti-free flow valve arrangement of the invention is simple, manufacturing cost is low.
Detailed description of the invention
Fig. 1 is the stereoscopic figure of anti-free flow valve according to a first embodiment of the present invention.
Fig. 2 is the schematic cross-sectional view of anti-free flow valve according to a first embodiment of the present invention, wherein Elastic valve core is in
Closed state.
Fig. 3 is the schematic cross-sectional view of anti-free flow valve according to a first embodiment of the present invention, wherein Elastic valve core is in
Open state.
Fig. 4 and Fig. 5 shows the elasticity of anti-free flow valve according to a first embodiment of the present invention from different perspectives respectively
The perspective view of spool.
Fig. 6 shows the main view of the Elastic valve core of anti-free flow valve according to a first embodiment of the present invention.
Fig. 7 is the schematic cross-sectional view of anti-free flow valve according to a second embodiment of the present invention, wherein Elastic valve core is in
Closed state.
Fig. 8 is the schematic cross-sectional view of anti-free flow valve according to a second embodiment of the present invention, wherein Elastic valve core is in
Open state.
Fig. 9 and Figure 10 shows the elasticity of anti-free flow valve according to a second embodiment of the present invention from different perspectives respectively
The perspective view of spool.
Figure 11 shows the main view of the Elastic valve core of anti-free flow valve according to a second embodiment of the present invention.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
Referring to figs. 1 to Fig. 6.A kind of anti-free flow valve according to an embodiment of the invention, including valve casing 1 and Elastic valve core
2。
Valve casing 1 has valve chamber 10, entrance 11 and outlet 12, and entrance 11 and outlet 12 are connected to valve chamber 10 respectively.In this reality
It applies in example, valve casing 1 is tightly connected including upper cover 1a and pedestal 1b, upper cover 1a and pedestal 1b, and limits valve chamber 10 jointly.Entrance 11
It is made of respectively inlet tube and outlet with outlet 12, inlet tube is connected with upper cover 1a, and outlet is connected with pedestal 1b.In Fig. 1
Into the example of Fig. 3, the center line for playing valve core 2, entrance 11, outlet 12 and valve chamber 10 is coaxial with the center line of valve casing 1.
Elastic valve core 2 is arranged in valve chamber 10, and has downwardly open cavity 20.The top of Elastic valve core 2 is closed simultaneously
Sealed entry 11, as shown in Figure 2.The diameter of the lateral surface of Elastic valve core 2 becomes larger from entrance 11 to outlet 12, and feather valve
The smooth no corner angle of the lateral surface of core 2.The material of Elastic valve core 2 can be using silica gel, thermoplastic elastic body (TPE) etc..
Preferably, the lateral surface of Elastic valve core 2 is equipped at least three cavitys 20 that are downwardly open and running through Elastic valve core 2
Notch 21, form a stabilizer blade 22 per between two adjacent notches 21.Further, at least three notch 21 is equally spacedly
The lateral surface of Elastic valve core 2 is set.Elastic valve core 2 is supported on the bottom surface 101 of valve chamber 10, the lateral surface of each 22 bottom end of stabilizer blade
Against the side wall 102 of valve chamber 10, so as to prevent the offset of Elastic valve core, it is ensured that generate vertical elastic reset power upward.
The top surface 103 of valve chamber 10 is arranged in the outlet end 112 of entrance 11.The arrival end 121 of outlet 12 is arranged in valve chamber 10
Bottom surface 101 on, at least three stabilizer blades 22 of Elastic valve core 2 be trapped among outlet 12 arrival end 121 around.
In this first embodiment, the top of Elastic valve core 2 is plane 23, and the lateral surface of Elastic valve core 2 is convex arc surface
24, the top of lateral surface is connected with the periphery of plane 23；Plane 23 abuts the top surface 103 of valve chamber 10, and by the outlet of entrance 11
112 closing of end.Convex arc surface 24 can be spherical surface, but not limited to this.
In clinical application, anti-free flow valve may be provided at feeding and pump on the liquid-transport pipe-line between liquid wheel and patient.
When the liquid of feeding pump pumping flows into entrance 11, under the action of fluid pressure flexible deformation can occur for Elastic valve core 2,
To open entrance 11, the liquid for flowing into entrance 11 flows into outlet 12 by the lateral surface of Elastic valve core 2, as shown in Figure 3.And
Once feeding pump when slipping to the liquid-transport pipe-line between liquid wheel and patient, feeding pump can stop working.In feeding pump pumping
When liquid is stopped flow into entrance 11, Elastic valve core 2 automatic elastic can reset under the action of natural resiliency power, so that elastic
The top of spool 2 is re-closing off and sealed entry 11, so as to prevent feeding liquid from flowing freely.Outside due to Elastic valve core 2
The diameter of side becomes larger from entrance to outlet, and the smooth no corner angle of lateral surface, therefore flows into anti-free flow valve inlet 11
Liquid be easy to by Elastic valve core 2 lateral surface flow into outlet 12, liquid flowing resistance is small, and flow velocity is big, and feeding liquid is not
Elastic valve core surface can be deposited in.
Preferably, each notch 21 is made of the first notch section 211 and the second notch section 212, the top of the second notch section 212
It is connected with the bottom of the first notch section 211.The width of the width of first notch section 211 and the second notch section 212 is from top
Portion to bottom is gradually increased, and the width of the second notch section 212 is increased speed greater than the width increase speed of the first notch section 211
Degree.The chamfered shape of first notch section 211 is convex arch, and the shape of two sides 214 of the second notch section 212 is dome arc
Shape.Using the advantage of this structure is, when from the feeding liquid stream that Elastic valve core lateral surface top flows down to the top of notch 21,
It directly will not directly fall from the top of notch 21, but can be along the outer side edges edge of two sides 213 of the first notch section 211
Then outer side edges with two sides 214 of the second notch section 212 are lacked along the bottom for flowing to Elastic valve core lateral surface by second
Oral area 212 flows into the arrival end 121 of outlet 12, so, it is possible to keep the flowing of feeding liquid more uniform, and avoids the formation of liquid hardly possible
With the dead zone of flowing.
Fig. 7 to Figure 11 shows a kind of anti-free flow valve according to a second embodiment of the present invention.The second embodiment with
The main distinction of first embodiment is the top of Elastic valve core and the shape of lateral surface.In a second embodiment, feather valve
The top of core 2A is cone, and the lateral surface of Elastic valve core 2A is made of the circular conical surface 23A and convex arc surface 24A of cone, convex
The top of arc surface 24A is connected with the bottom end periphery of circular conical surface 23A.Convex arc surface 24A can be spherical surface, but not limited to this.Such as
Shown in figure, the top of cone is protruded into the outlet end 112 of entrance 11, the circular conical surface 23A of cone and the outlet end of entrance 11
112 form linear sealing.
Similar with first embodiment, Elastic valve core 2A has downwardly open cavity 20A.The lateral surface of Elastic valve core 2A
Notch 21A equipped at least three cavity 20A that are downwardly open and running through Elastic valve core 2A, per two adjacent notch 21A
Between form a stabilizer blade 22A.Further, at least three notch 21A is arranged equally spaced at the lateral surface of Elastic valve core 2A.
Elastic valve core 2A is supported on the bottom surface 101 of valve chamber 10, the side wall 102 of the lateral surface of the bottom end each stabilizer blade 22A against valve chamber 10.Bullet
Property spool 2 at least three stabilizer blade 22A be trapped among outlet 12 arrival end 121 around.Each notch 21A is by the first notch section 211A
It is formed with the second notch section 212A, the top of the second notch section 212A is connected with the bottom of the first notch section 211A.First notch
The width of the width of portion 211A and the second notch section 212A are gradually increased from top to bottom, and the second notch section 212A
The width increased speed greater than the first notch section 211A of width increase speed.The chamfered shape of first notch section 211A is dome
Arc shows two side 213A of the first notch section 211A in Fig. 9.The shape of two side 214A of second notch section 212A
Shape is convex arch.
When the liquid of feeding pump pumping flows into entrance 11, Elastic valve core 2A can occur under the action of fluid pressure
Flexible deformation, to open entrance 11, the liquid for flowing into entrance 11 flows into outlet 12 by the lateral surface of Elastic valve core 2A, such as
Shown in Fig. 8.When the liquid of feeding pump pumping stops flow into entrance 11, Elastic valve core 2A can be in the effect of natural resiliency power
Lower automatic elastic resets, so that being re-closing off simultaneously sealed entry 11 at the top of Elastic valve core 2A.
The description of the present embodiment combines specific embodiment, but it should be understood by one skilled in the art that this hair
It is bright to be not limited to embodiment described here, and various modifications can be carried out and variation is without departing from spirit and model of the invention
It encloses.
Claims (10)
1. a kind of anti-free flow valve characterized by comprising
Valve casing, the valve casing have valve chamber, entrance and exit；The entrance and the outlet are connected to the valve chamber respectively；
Elastic valve core, the Elastic valve core are arranged in the valve chamber, and have downwardly open cavity；The top of Elastic valve core
It is closing and sealing off the entrance, the diameter of the lateral surface of Elastic valve core becomes larger from the entrance to the outlet, and bullet
The smooth no corner angle of lateral surface of property spool；
When the liquid of pumping flows into the entrance, under the action of fluid pressure flexible deformation can occur for Elastic valve core,
To open the entrance, the liquid for flowing into entrance flows into the outlet by the lateral surface of Elastic valve core；In the liquid of pumping
When body is stopped flow into the entrance, the Elastic valve core automatic elastic can reset under the action of natural resiliency power, so that
The entrance is closing and sealing off at the top of Elastic valve core.
2. anti-free flow valve as described in claim 1, which is characterized in that the lateral surface of the Elastic valve core is equipped at least three
The notch of cavity that is a downwardly open and running through Elastic valve core often forms a stabilizer blade between two adjacent notches.
3. anti-free flow valve as claimed in claim 2, which is characterized in that at least three notch is arranged equally spaced at
The lateral surface of the Elastic valve core.
4. anti-free flow valve as claimed in claim 2, which is characterized in that each notch is lacked by the first notch section and second
Oral area composition, the top of second notch section is connected with the bottom of first notch section；The width of first notch section
And the width of second notch section is to be gradually increased from top to bottom, and the width of the second notch section is increased speed greatly
It increases speed in the width of the first notch section；The chamfered shape of first notch section is convex arch, second notch section
Two sides shape be convex arch.
5. anti-free flow valve as claimed in claim 2, which is characterized in that the Elastic valve core is supported in the bottom of the valve chamber
On face, the side wall of the lateral surface of each feet bottom against the valve chamber；The arrival end of the outlet is arranged on the bottom surface of valve chamber,
At least three stabilizer blades of the Elastic valve core are trapped among around the arrival end of the outlet.
6. anti-free flow valve as described in claim 1, which is characterized in that the valve casing includes upper cover and pedestal, it is described on
Lid and the pedestal are tightly connected, and limit the valve chamber jointly；
The entrance and exit is made of inlet tube and outlet respectively, and the inlet tube is connected with the upper cover, it is described go out
Mouth pipe is connected with the pedestal.
7. anti-free flow valve as described in claim 1, which is characterized in that the material of the Elastic valve core is silica gel, rubber
Or thermoplastic elastomer (TPE).
8. anti-free flow valve as claimed in any of claims 1 to 7 in one of claims, which is characterized in that the outlet end of the entrance
The top surface of the valve chamber is set.
9. anti-free flow valve as claimed in claim 8, which is characterized in that the top of the Elastic valve core is plane, described
The lateral surface of Elastic valve core is convex arc surface, and the top of the lateral surface is connected with the periphery of the plane；
The plane abuts the top surface of the valve chamber, and the outlet end of the entrance is closed.
10. anti-free flow valve as claimed in claim 8, which is characterized in that the top of the Elastic valve core is cone, institute
The lateral surface for stating Elastic valve core is made of the circular conical surface and convex arc surface of the cone, the top of the convex arc surface with it is described
The bottom end periphery of circular conical surface is connected；
The top of the cone is protruded into the outlet end of the entrance, the outlet of the circular conical surface of the cone and the entrance
End forms linear sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247588.9A CN110292532B (en) | 2018-03-23 | 2018-03-23 | Free flow prevention valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247588.9A CN110292532B (en) | 2018-03-23 | 2018-03-23 | Free flow prevention valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110292532A true CN110292532A (en) | 2019-10-01 |
| CN110292532B CN110292532B (en) | 2024-05-03 |
Family
ID=68026062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810247588.9A Active CN110292532B (en) | 2018-03-23 | 2018-03-23 | Free flow prevention valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110292532B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002267032A (en) * | 2001-03-12 | 2002-09-18 | Jiro Matsuyama | Ball check valve |
| CN1440305A (en) * | 2000-06-29 | 2003-09-03 | 雀巢制品公司 | Medium cracking pressure valve arrangement |
| US20050257838A1 (en) * | 2002-03-22 | 2005-11-24 | Enerson Jon R | Disc check valve |
| US20060108554A1 (en) * | 2004-10-01 | 2006-05-25 | Enerson Jon R | Dome check valve |
| CN105757010A (en) * | 2013-09-07 | 2016-07-13 | 中山市丰申电器有限公司 | Siphon capable of quickly building liquid surging channel |
| CN208799545U (en) * | 2018-03-23 | 2019-04-30 | 美昕医疗器械(昆山)有限公司 | Anti-free flow valve |
-
2018
- 2018-03-23 CN CN201810247588.9A patent/CN110292532B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440305A (en) * | 2000-06-29 | 2003-09-03 | 雀巢制品公司 | Medium cracking pressure valve arrangement |
| JP2002267032A (en) * | 2001-03-12 | 2002-09-18 | Jiro Matsuyama | Ball check valve |
| US20050257838A1 (en) * | 2002-03-22 | 2005-11-24 | Enerson Jon R | Disc check valve |
| US20060108554A1 (en) * | 2004-10-01 | 2006-05-25 | Enerson Jon R | Dome check valve |
| CN105757010A (en) * | 2013-09-07 | 2016-07-13 | 中山市丰申电器有限公司 | Siphon capable of quickly building liquid surging channel |
| CN208799545U (en) * | 2018-03-23 | 2019-04-30 | 美昕医疗器械(昆山)有限公司 | Anti-free flow valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110292532B (en) | 2024-05-03 |
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