CN107596492A - A kind of transfusion device back-flow preventer - Google Patents
A kind of transfusion device back-flow preventer Download PDFInfo
- Publication number
- CN107596492A CN107596492A CN201710904225.3A CN201710904225A CN107596492A CN 107596492 A CN107596492 A CN 107596492A CN 201710904225 A CN201710904225 A CN 201710904225A CN 107596492 A CN107596492 A CN 107596492A
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- China
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- siphunculus
- ball float
- bend
- straight way
- connecting rod
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Abstract
The invention discloses a kind of transfusion device back-flow preventer, belong to technical field of medical equipment, including the seal member positioned at dropping funnel bottom, straight way siphunculus, annular seal space and the bend siphunculus being sequentially communicated are provided with the seal member from top to bottom, the bend siphunculus is horizontal serpentine pipe, and bend siphunculus lower ending opening connects lower infusion tube；Ball float one and ball float two are respectively equipped with the upper end open of the straight way siphunculus and bend siphunculus, and be fixed together between ball float one and ball float two by connecting rod, the lower end of ball float two is fixed with locating rod of the length not less than the top of ball float two to the distance between annular seal space top；The connecting rod bottom is provided with support claw at ball float two, and the horizontal range between the support claw top and bottom is more than the distance between connecting rod surface and straight way siphunculus tube wall.The present invention, which has three, makes mechanism of the decoction level stability in dropping funnel, in normal use, it is ensured that fluid column pressure is consistently greater than blood pressure, effectively prevents blood backflow.
Description
Technical field
The present invention relates to technical field of medical equipment, is specifically related to a kind of transfusion device back-flow preventer.
Background technology
Transfusion device is a kind of extremely common medical treatment consumptive materials, the passage established between vein and decoction, for venous transfusion.
Typically by intravenous needle, injection needle or transfusion needle, needle-covering cap, infusion tube, liquid medicine filter, regulating valve, dropping funnel, bottle stopper puncture
The part such as device, air cleaner connection composition, infusion segment device also have injection member, dosing mouth etc..The upper and lower port difference of dropping funnel
Infusion tube and lower infusion tube in connection, transfusion device first treat the decoction level stability in dropping funnel, then carry out in infusion process
Transfusion, now fluid column pressure is certain with the difference of blood pressure in vein (atmospheric pressure mutually balances, and fluid column pressure is more than venous pressure) so that
Decoction is at the uniform velocity inputted in blood vessel；After the decoction in medicine bottle is totally lost, the decoction liquid level in dropping funnel is begun to decline, and fluid column presses off the beginning and subtracted
It is small, when fluid column pressure is equal to venous pressure, if not taking measures in time, blood backflow situation easily occurs, so working as fluid column pressure
Before venous pressure, to stop liquid (pause transfusion) in time, make level stability.Under the normal use state of transfusion device, drop
Fluid column pressure is necessarily greater than venous pressure corresponding to height where the bottom of bucket.
At present, still in general transfusion device commonly used in real life, it does not possess back-flow preventer.
The content of the invention
1. technical problems to be solved
The technical problem to be solved in the present invention is to provide a kind of transfusion device back-flow preventer, and it, which has three, makes decoction liquid
The stable mechanism in dropping funnel in position, in normal use, it is ensured that fluid column pressure is consistently greater than blood pressure, effectively prevents blood backflow.
2. technical scheme
To solve the above problems, the present invention adopts the following technical scheme that：
A kind of transfusion device back-flow preventer, in dropping funnel, including the seal member positioned at dropping funnel bottom, and the sealing
The side and bottom of part are brought into close contact with dropping funnel inwall, and dropping liquid is formed between the seal member upper surface and dropping funnel inwall
Chamber；Straight way siphunculus, annular seal space and the bend siphunculus being sequentially communicated, the straight way siphunculus are provided with the seal member from top to bottom
Upper end open is located at seal member upper surface, and the bend siphunculus is horizontal serpentine pipe, and bend siphunculus lower ending opening connects
Lower infusion tube；Ball float one and ball float two, and ball float one are respectively equipped with the upper end open of the straight way siphunculus and bend siphunculus
It is fixed together between ball float two by connecting rod, the connecting rod is placed in straight way siphunculus, and the diameter of connecting rod is less than
The caliber of straight way siphunculus, the lower end of ball float two are fixed with locating rod, and the diameter of the locating rod is less than the caliber of bend siphunculus,
The length of locating rod is not less than the distance between top of ball float two to annular seal space top；The connecting rod bottom is close to ball float two
Position is uniformly provided with least two support claws along its periphery, and the support claw lower end is fixed in connecting rod, on the support claw
Horizontal range between end and lower end is more than the distance between connecting rod surface and straight way siphunculus tube wall；The bend siphunculus is located at
The level height of the bottom of the bend of top is equal to or higher than level height where the upper end open of bend siphunculus.Only from structure point
Analysis, so that it may which level stability can be made in the bottom of bend siphunculus bend above by knowing, when its height is upper higher than bend siphunculus
End opening, i.e. decoction can submerge the junction of annular seal space and bend siphunculus, so as to enhance the sealing of the junction, be advantageous to
Completely cut off air, the stabilization of liquid level is further ensured that, so that it is guaranteed that device prevents blood backflow function.
As the improvement to such scheme, taper is set at the upper end open of the straight way siphunculus and bend siphunculus, and
Ball float one and the bottom of ball float two are set to the taper being adapted with the tapered opening.Because under general state, siphunculus openend is
Cylinder, ball float are spherical, and the joint place of ball float and siphunculus opening is only circle where the mouth of pipe, and laminating points are less, and siphunculus is opened
Mouthful end and ball float are set to the pyramidal structure being adapted, their binding face be changed into the taper surface of pyramidal structure (can regard as by
The circle of multiple size gradual changes is overlapping to be formed) so that being bonded between straight way siphunculus and bend siphunculus and ball float is more close.
It is fixed in the middle part of the tapered opening of the straight way siphunculus and bend siphunculus as further improvement of these options
There is O-ring seal.When ball float occurs trickle mobile, O-ring seal more can firmly be attached to ball float surface, be further ensured that
The compactness being bonded between straight way siphunculus and bend siphunculus and ball float.
As the improvement to such scheme, the support claw lower end is fixed on a collar, and the collar is consolidated by screw thread
It is scheduled in connecting rod.The collar is added, and the mode being connected through a screw thread between the collar and connecting rod is fixed, and is arranged and fixed conveniently,
Support claw is conveniently replaceable, and does not interfere with connecting rod.
3. beneficial effect
(1) present invention is provided with seal member in dropping funnel, and sets connection dropping funnel inner chamber defeated with in seal member
The passage of liquid flexible pipe, two ball floats moved jointly are then provided with passage upper port and middle part, after decoction instills dropping funnel, with
The rising of liquid level, ball float slowly rises, and opens passage, and decoction flows to lower infusion tube from passage, realizes normal infusion；Defeated
When liquid closes to an end, liquid level is gradually reduced in dropping funnel, and ball float also declines therewith, and passage upper port and middle part are carried out jointly
Sealing, stops transfusion, and liquid level no longer declines, you can prevents blood backflow.And double floater seals realize that two pass insures, even if wherein
One situation that sealing deficiency occurs, also can guarantee that the stabilization of liquid level.
(2) present invention will in seal member set connection dropping funnel inner chamber and lower infusion tube passage be divided into straight way siphunculus,
Annular seal space and bend siphunculus, wherein straight way siphunculus are easy to connect two ball floats, also allow for manipulating two ball floats simultaneously and move jointly,
Annular seal space can be that ball float two provides an activity space, and be easy to install the mobile position-limit mechanism to ball float additional, and bend siphunculus is " S "
Shape, its own just has the control function to liquid level, can further strengthen ensureing the stabilization of liquid level.
(3) in the present invention by the mode of sealing (isolation air, eliminate atmospheric pressure) by level stability in dropping funnel, ensure
Fluid column pressure is consistently greater than vein pressure, realizes the function of preventing blood backflow；Meanwhile when decoction i.e. will be defeated most, because accomplishing
Completely cut off air, air intravasation can be prevented, be advantageous to ensure patient safety.
(4) present invention is provided with support claw in connecting rod bottom close to the position of ball float two, during ball float rises, branch
Support claw upper end first contradicts the top of annular seal space, prevents ball float from continuing to rise, prevents ball float two from blocking straight way siphunculus, ensure that
Connected relation during transfusion between straight way siphunculus and annular seal space.
(5) present invention is fixed with locating rod in the lower end of ball float two, and the length of locating rod is close not less than being arrived at the top of ball float two
The distance between top of chamber is sealed, after ball float two rises, related locating rod rises together, and the limit displacement that ball float two rises
As the top of ball float two to the distance between at the top of annular seal space (in fact, the distance that ball float two rises be less than its limit movement away from
From), so in the uphill process of ball float two, locating rod lower end is always positioned in bend siphunculus, when ball float declines, locating rod
Ball float can be effectively guided to drop to accurate location, help promotes seal process.
The present invention, which has three, makes mechanism of the decoction level stability in dropping funnel, in normal use, it is ensured that fluid column pressure begins
It is more than blood pressure eventually, effectively prevents blood backflow, and completely cuts off air, mechanical automatic controlling level is higher, and simple in construction,
Manufacturing cost is low, can greatly reduce the workload of medical personnel, avoids being immediately required to medical personnel because liquid medicine is totally lost and coming to pull out
The processing operation of pin or dressing product, the present apparatus can make liquid level be maintained at a home after the completion of transfusion, and will not be right
Medicine company produces larger waste, comes to leave the time of abundance for medical personnel so that the processing of medical personnel's having time more steps up
Other anxious work, reduce the work load of medical personnel.So used suitable for large-scale promotion.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the schematic diagram of Section A-A in Fig. 1.
Fig. 3 is the connecting portion structural representation of connecting rod and ball float two in the present invention.
Wherein, 1- dropping funnels, the upper infusion tubes of 2-, infusion tube under 3-, 4- seal members, 5- straight way siphunculus, 6- sealings
Chamber, 7- bend siphunculus, 8- ball floats one, 9- connecting rods, 10- ball floats two, 11- locating rods, 12- support claws, 13- drip chambers, 14- sets
Ring, 15- screw threads, 17- O-ring seals.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and examples.
Embodiment
A kind of transfusion device back-flow preventer as shown in Figures 1 and 2, in dropping funnel 1, including positioned at the bottom of dropping funnel 1
Seal member 4, and the side of the seal member 4 and bottom are brought into close contact with the inwall of dropping funnel 1, the upper surface of seal member 4
Drip chamber 13 is formed between the inwall of dropping funnel 1；The straight way siphunculus 5, close being sequentially communicated is provided with the seal member 4 from top to bottom
Chamber 6 and bend siphunculus 7 are sealed, the upper end open of straight way siphunculus 5 is located at the upper surface of seal member 4, and the bend siphunculus 7 is horizontal
Serpentine pipe, and the lower infusion tube 3 of the lower ending opening of bend siphunculus 7 connection；Open the upper end of the straight way siphunculus 5 and bend siphunculus 7
Ball float 1 and ball float 2 10 are respectively equipped with mouthful, and is fixed together between ball float 1 and ball float 2 10 by connecting rod 9,
The connecting rod 9 is placed in straight way siphunculus 5, and the diameter of connecting rod 9 is less than the caliber of straight way siphunculus 5, under the ball float 2 10
End is fixed with locating rod 11, and the diameter of the locating rod 11 is less than the caliber of bend siphunculus 7, and the length of locating rod 11 is not less than floating
The distance between top of annular seal space 6 is arrived at the top of ball 2 10；The bottom of connecting rod 9 is equal along its periphery close to the position of ball float 2 10
Even to be provided with least two support claws 12, the lower end of support claw 12 is fixed in connecting rod 9, and the upper end of support claw 12 is with
Horizontal range between end is more than the distance between the surface of connecting rod 9 and the tube wall of straight way siphunculus 5；As shown in figure 1, the bend leads to
The level height of the bottom of the bend above of pipe 7 is equal to or higher than level height where the upper end open of bend siphunculus 7.
Only from structural analysis, so that it may which level stability can be made in the bottom of the bend above of bend siphunculus 7 by knowing, when its height is higher than curved
The upper end open of road siphunculus, i.e. decoction can submerge the junction of annular seal space 6 and bend siphunculus 7, so as to enhance the junction
Sealing, be advantageous to completely cut off air, the stabilization of liquid level be further ensured that, so that it is guaranteed that device prevents blood backflow function.
In the present embodiment, as shown in figure 1, being set to bore at the upper end open of the straight way siphunculus 5 and bend siphunculus 7
Shape, and ball float 1 and the bottom of ball float 2 10 are set to the taper that is adapted with the tapered opening.Since under general state, siphunculus
Openend is cylinder, and ball float is spherical, and the joint place of ball float and siphunculus opening is only circle where the mouth of pipe, and laminating points are less,
The pyramidal structure that siphunculus openend and ball float are set to be adapted, the taper surface that their binding face is changed into pyramidal structure (can
To regard as, circle by multiple size gradual changes is overlapping to be formed) so that being bonded between straight way siphunculus 5 and bend siphunculus 7 and ball float
It is more close.
In the present embodiment, as shown in figure 1, being respectively and fixedly provided with the middle part of the tapered opening of the straight way siphunculus 5 and bend siphunculus 7
O-ring seal 17.When ball float occurs trickle mobile, O-ring seal 17 more can firmly be attached to ball float surface, further protect
The compactness being bonded between card straight way siphunculus 5 and bend siphunculus 7 and ball float.
In the present embodiment, as shown in figure 3, the lower end of the support claw 12 is fixed on a collar 14, the collar 14 is logical
Screw thread 15 is crossed to be fixed in connecting rod 9.The collar 14 is added, and the mode being connected through a screw thread between the collar 14 and connecting rod 9 is consolidated
It is fixed, it is arranged and fixed conveniently, is conveniently replaceable support claw 12, and does not interfere with connecting rod 9.
The concrete application process of the back-flow preventer of above-mentioned transfusion device is：
(1) when just starting transfusion, decoction drop is instilled in dropping funnel 1 from upper transfusion short tube 2, and is accumulated in drip chamber 13,
With the rising of liquid level, ball float 1 rises together with ball float 2 10, and straight way siphunculus 5 and bend siphunculus 7 are opened simultaneously, decoction
Pass through straight way siphunculus 5, annular seal space 6 and bend siphunculus 7 successively, eventually enter into lower infusion tube 3, first close regulating valve, treat dropping funnel
When liquid level reach a certain height in 1, then switch valve is opened, normal infusion；In ball float uphill process, support claw 12 is on
Rising, to propping up the top of annular seal space 6, prevent ball float from continuing to rise, straight way siphunculus 5, annular seal space 6 and bend siphunculus 7 keep connecting,
Ensure normal infusion；
(2) after the decoction in medicine bottle is totally lost, the liquid level in dropping funnel 1 is gradually reduced, and ball float 1 and ball float 2 10 are also slowly
Decline, support claw 12 declines therewith, and under the guiding of locating rod 11, ball float 1 and ball float 2 10 accurately return to original position, respectively
It is brought into close contact with the upper end open of straight way siphunculus 5 and bend siphunculus 7；Decoction level stability is constant in dropping funnel 1 so that transfusion
Fluid column pressure is consistently greater than blood pressure in device, effectively prevents blood backflow.
Those of ordinary skill in the art it should be appreciated that the embodiment of the above be intended merely to explanation the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification will all fall in scope of the presently claimed invention.
Claims (4)
- A kind of 1. transfusion device back-flow preventer, it is characterised in that described device is interior located at dropping funnel (1), including positioned at dropping funnel (1) bottom The seal member (4) in portion, and the side of the seal member (4) and bottom are brought into close contact with dropping funnel (1) inwall, the sealing Drip chamber (13) is formed between part (4) upper surface and dropping funnel (1) inwall；It is provided with from top to bottom successively in the seal member (4) Straight way siphunculus (5), annular seal space (6) and the bend siphunculus (7) of connection, straight way siphunculus (5) upper end open are located at seal member (4) upper surface, the bend siphunculus (7) is horizontal serpentine pipe, and bend siphunculus (7) lower ending opening connects lower infusion tube (3)；Ball float one (8) and ball float two (10) are respectively equipped with the upper end open of the straight way siphunculus (5) and bend siphunculus (7), and It is fixed together between ball float one (8) and ball float two (10) by connecting rod (9), the connecting rod (9) is placed in straight way siphunculus (5) It is interior, and the diameter of connecting rod (9) is less than the caliber of straight way siphunculus (5), described (10) lower end of ball float two is fixed with locating rod (11), The diameter of the locating rod (11) is less than the caliber of bend siphunculus (7), and the length of locating rod (11) is pushed up not less than ball float two (10) Portion is to the distance between at the top of annular seal space (6)；Connecting rod (9) bottom is uniform along its periphery close to the position of ball float two (10) Provided with least two support claws (12), support claw (12) lower end is fixed in connecting rod (9), support claw (12) upper end Horizontal range between lower end is more than the distance between connecting rod (9) surface and straight way siphunculus (5) tube wall；The bend siphunculus (7) level height of the bottom of bend above is equal to or higher than level height where the upper end open of bend siphunculus (7).
- A kind of 2. transfusion device back-flow preventer according to claim 1, it is characterised in that the straight way siphunculus (5) and curved Taper is set at the upper end open of road siphunculus (7), and ball float one (8) and ball float two (10) bottom are set to and the tapered opening The taper being adapted.
- A kind of 3. transfusion device back-flow preventer according to claim 2, it is characterised in that the straight way siphunculus (5) and curved O-ring seal (17) is respectively and fixedly provided with the middle part of the tapered opening of road siphunculus (7).
- 4. a kind of transfusion device back-flow preventer according to claim 1, it is characterised in that support claw (12) lower end is solid It is scheduled on a collar (14), the collar (14) is fixed in connecting rod (9) by screw thread (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710904225.3A CN107596492A (en) | 2017-09-29 | 2017-09-29 | A kind of transfusion device back-flow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710904225.3A CN107596492A (en) | 2017-09-29 | 2017-09-29 | A kind of transfusion device back-flow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107596492A true CN107596492A (en) | 2018-01-19 |
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ID=61059263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710904225.3A Pending CN107596492A (en) | 2017-09-29 | 2017-09-29 | A kind of transfusion device back-flow preventer |
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| Country | Link |
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| CN (1) | CN107596492A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110420364A (en) * | 2019-07-24 | 2019-11-08 | 郑州儿童医院 | Anti-empty transfusion system |
| WO2023138704A1 (en) * | 2022-01-20 | 2023-07-27 | 上海协贮智能科技服务有限公司 | Automatic liquid-stop and blood-return-prevention infusion set |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6695004B1 (en) * | 2002-12-16 | 2004-02-24 | Alaris Medical Systems, Inc. | Magnetic automatic stop valve |
| CN202426960U (en) * | 2012-06-14 | 2012-09-12 | 李好然 | Blood-return-preventing automatic fluid-stopping infusion device |
| CN103800971A (en) * | 2012-11-14 | 2014-05-21 | 王晓伟 | New type accurate regulating device for venous transfusion |
| CN105727393A (en) * | 2016-01-06 | 2016-07-06 | 周常 | Liquid stopper |
| CN205360158U (en) * | 2016-01-14 | 2016-07-06 | 雷建闽 | Device is proclaimed oneself to greatest extent to venous transfusion liquid |
-
2017
- 2017-09-29 CN CN201710904225.3A patent/CN107596492A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6695004B1 (en) * | 2002-12-16 | 2004-02-24 | Alaris Medical Systems, Inc. | Magnetic automatic stop valve |
| CN202426960U (en) * | 2012-06-14 | 2012-09-12 | 李好然 | Blood-return-preventing automatic fluid-stopping infusion device |
| CN103800971A (en) * | 2012-11-14 | 2014-05-21 | 王晓伟 | New type accurate regulating device for venous transfusion |
| CN105727393A (en) * | 2016-01-06 | 2016-07-06 | 周常 | Liquid stopper |
| CN205360158U (en) * | 2016-01-14 | 2016-07-06 | 雷建闽 | Device is proclaimed oneself to greatest extent to venous transfusion liquid |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110420364A (en) * | 2019-07-24 | 2019-11-08 | 郑州儿童医院 | Anti-empty transfusion system |
| CN110420364B (en) * | 2019-07-24 | 2024-02-09 | 郑州儿童医院 | Infusion apparatus capable of preventing air drop |
| WO2023138704A1 (en) * | 2022-01-20 | 2023-07-27 | 上海协贮智能科技服务有限公司 | Automatic liquid-stop and blood-return-prevention infusion set |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180119 |
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| RJ01 | Rejection of invention patent application after publication |