CN105698878A - Jet type flow detection device for medical instrument - Google Patents
Jet type flow detection device for medical instrument Download PDFInfo
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- CN105698878A CN105698878A CN201610172450.8A CN201610172450A CN105698878A CN 105698878 A CN105698878 A CN 105698878A CN 201610172450 A CN201610172450 A CN 201610172450A CN 105698878 A CN105698878 A CN 105698878A
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- China
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- tube body
- straight tube
- section shape
- pressure tappings
- cone
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
Abstract
A jet type flow detection device for a medical instrument is characterized in that the device comprises a straight pipe (1) and a jet body (2) arranged in the straight pipe (1); the straight pipe (1) is arranged in the flowing direction of fluid; the jet body (2) comprises a straight section middle part (201) and jet cones (202) located at the two ends of the straight section middle part (201) in the flowing direction of the fluid, the two jet cones (202) are symmetrically arranged in a front-back mode in the flowing direction of the fluid, and the cone apex angle alpha of each jet cone (202) is 10-50 degrees; an air flow gathering and compressing area (4) is formed between the inner wall of the straight pipe (1) and the straight section middle part (201) of the jet body (2); an upstream pressure tapping (102) is formed in the position, corresponding to the cone bottom of one jet cone (202), on the straight pipe (1); a downstream pressure tapping (103) is formed in the position, corresponding to the cone bottom of the other jet cone, on the straight pipe (1).The jet type flow detection device meets the requirements of the medical instrument for high precision, small errors and miniaturization of flow detection devices.
Description
Technical field
The present invention relates to field of medical device, particularly relate to Medical Instruments injecting type flow detector, described Medical Instruments refers to that respirator, oxygenerator, anesthetic machine etc. need to carry out the instrument of flow detection。
Background technology
At present, use on the market maximum flow detectors measure laminar flow structure adopt have V taper, venturi, orifice plate etc., it is that after and throttling front by measurement laminar flow structure throttling, the pressure at two ends records pressure reduction, then calculate by the flow value in its pipeline, the size by orifice size that regulates of its accuracy value determines its worth precision height, there is the advantage that long-time stability are good, reproducible, but V taper have its fatal defects can not reversal measuring, and Venturi tube structure need take very long design space。And, the flow detectors such as existing V taper, venturi are only applicable to the occasion of Large Diameter Pipeline mostly, in GB, the flow detector of V taper is applicable to the occasion of more than caliber 50mm, it is typically used in the main equipments such as oil, chemical industry, iron and steel, electric power, this kind of small-sized occasion requiring that again inspection accuracy of measurement is high of armarium is not appropriate for。
On the other hand, Medical Instruments is respirator particularly, at work by gathering data on flows, judge exhaling and suction event of patient, when supplying required air-flow for patient, it is necessary to judge the pressure difference value adapted to, have effective pressure difference value only, just can be controlled effectively response, and guarantee patient will not cause uncomfortable because of control problem, and situation about even endangering occurs；Additionally when gathering, in order to detect stable flow signal, must assure that the force value at two ends all can not have too big fluctuation, otherwise can cause the erroneous judgement exhaling and inhaling event switching point, also also result in patient's discomfort even Harm to occur, so, in respirator, flow detector is vitals, directly determines the service behaviour of instrument。
Applicant finds a Bidirectional V-cone flowmeter through retrieval, referring to the utility model patent of China CN201463943U。The effusion meter of this patent disclosure adopts Bidirectional cone, and corresponding Bidirectional cone central authorities set low pressure pressure tappings, and the end positions of corresponding Bidirectional cone respectively sets a high pressure pressure tappings, and are connected to pressure switching valve on high pressure pressure tappings, are namely switch to realize bidirectional measurement。Though this Bidirectional V-cone flowmeter seems and achieves bidirectional measurement, but it is still and needs switching to realize, be not suitable for respirator, anesthetic machine needs to judge to exhale and inhale the Medical Instruments of event by flow detection, and, this Bidirectional V-cone flowmeter is also only applicable to the occasion of more than caliber 50mm, is not appropriate for for this kind of small-sized occasion requiring that again inspection accuracy of measurement is high of Medical Instruments。
Summary of the invention
It is an object of the present invention to provide a kind of Medical Instruments injecting type flow detector, to meet, precision height that flow detector proposes by Medical Instruments, error be little and the requirement of miniaturization。
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of Medical Instruments injecting type flow detector, including body always and be located at the ejectisome in straight tube body；Described straight tube body is arranged along fluid flow direction, described ejectisome includes being positioned at the spray cone at two ends in the middle part of straight section shape in the middle part of straight section shape and on fluid flow direction, two spray cone front and back on fluid flow direction are symmetrical, and the cone-apex angle of described spray cone is 10 °-50 °；The length of described straight tube body is slightly shorter than or is equal to the length of ejectisome, makes the summit of two spray cone of ejectisome be positioned at or stretch out in the two-port of straight tube body, and is provided with chamfering in the two-port of straight tube body；Airflow concentration compressional zone is formed between in the middle part of the straight section shape of described straight inboard wall of tube body and ejectisome；Length L in the middle part of described straight section shape is more than 1.2 times in the middle part of straight section shape with the spacing d of straight inboard wall of tube body；Described straight tube body offers upstream pressure tappings corresponding to the cone bottom of a spray cone, and the cone bottom corresponding to another spray cone offers downstream pressure tappings。
In such scheme, in the middle part of described straight section shape and between spray cone, it is additionally provided with recess, circumferentially disposed around ejectisome of this recess, make to form relief area between recess and straight inboard wall of tube body, described upstream pressure tappings and downstream pressure tappings are all corresponding to be offered towards recess。Described recess refers to the region of indent on ejectisome, it is also possible to be called groove, and its cross section can be sag vertical curve, it is also possible to be straight line knuckle etc.。
In such scheme, also including a sprue, described straight tube body is arranged in sprue, and straight tube body is connected support by least one ribs and is connected to sprue；Described ribs internal corresponding described upstream pressure tappings is provided with upstream cushion chamber, and corresponding described downstream pressure tappings is provided with downstream cushion chamber, and described upstream pressure tappings is through upstream cushion chamber pass-out, and described downstream pressure tappings is through downstream cushion chamber pass-out；The sectional area of described upstream cushion chamber and volume are more than the sectional area of upstream pressure tappings and volume, and the sectional area of described downstream cushion chamber and volume are more than the sectional area of downstream pressure tappings and volume。
In such scheme, the length L in the middle part of described straight section shape is 2-4 times in the middle part of straight section shape with the spacing d of straight inboard wall of tube body。
In such scheme, the length L in the middle part of described straight section shape is 3 times in the middle part of straight section shape with the spacing d of straight inboard wall of tube body。
In such scheme, described ejectisome offers runner along fluid flow direction。
In such scheme, described ejectisome is solid construction。
Due to the application of technique scheme, the invention have the advantages that
Special shape design due to the ejectisome of the present invention, and straight tube body two-port is provided with chamfering, can guarantee that air-flow linearly track sprays, as shown in Figure 2, increase the stability of detection data on flows, suppress the phenomenon that the flow signal error that causes due to flow trace instability is bigger, meet that precision height that flow detector proposes by Medical Instruments, error be little and the requirement of miniaturization。
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention one structural representation；
Fig. 2 is the use state flow view of the embodiment of the present invention one；
Fig. 3 is the embodiment of the present invention two structure schematic front view；
Schematic diagram is looked on the right side that Fig. 4 is Fig. 3；
Fig. 5 is the H-H sectional view of the first ribs cross sectional shape of representative of Fig. 3；
Fig. 6 is the H-H sectional view of representative the second ribs cross sectional shape of Fig. 3；
Fig. 7 is the H-H sectional view of the third ribs cross sectional shape of representative of Fig. 3；
Fig. 8 is the embodiment of the present invention three structure schematic front view。
In above figure: 1, straight tube body；101, chamfering；102 upstream pressure tappings；103, downstream pressure tappings；104, ribs；2, ejectisome；201, in the middle part of straight section shape；202, spray cone；203, recess；204, ribs；205, through hole；3, sprue；301, upstream detection mouth；302, detected downstream mouth；4, airflow concentration compressional zone；5, relief area；6, upstream cushion chamber；7, downstream cushion chamber。
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment one: referring to shown in Fig. 1 and Fig. 2:
A kind of Medical Instruments injecting type flow detector, including body 1 always and be located at the ejectisome 2 in straight tube body 1。
Shown in Figure 1, described straight tube body 1 is arranged along fluid flow direction, described ejectisome 2 includes in the middle part of straight section shape 201 and is positioned at the spray cone 202 at 201 two ends in the middle part of straight section shape on fluid flow direction, two spray cone 202 front and back on fluid flow direction are symmetrical, the cone-apex angle α of described spray cone 202 is 10 °-50 °, being preferably 20-50 °, the best is exemplified as 22.5 ° or 45 °。Ejectisome 2 is supported by one or more ribs 204 and is connected on the inwall of straight tube body 1, and when ribs 204 is multiple, multiple ribs 204 are uniform in the circumference of straight tube body 1。
Shown in Figure 1, the length of described straight tube body 1 is slightly shorter than or is equal to the length of ejectisome 2, the summit making two spray cone of ejectisome 2 is positioned at or stretches out in the two-port of straight tube body 1, and in the two-port of straight tube body 1, it being provided with chamfering 101, the effect of this chamfering 101 is the linear condition regulating output gas flow。
Shown in Figure 1, form airflow concentration compressional zone 4 in the middle part of the straight section shape of described straight tube body 1 inwall and ejectisome 2 between 201。
Shown in Figure 1, in the middle part of described straight section shape the length L of 201 be in the middle part of straight section shape 201 with more than 1.2 times of the spacing d of straight tube body 1 inwall, it is advantageous to being more than 1.5 times, best be 2-4 times, the present embodiment is exemplified as 3 times。
Shown in Figure 1, described straight tube body 1 offers upstream pressure tappings 102 corresponding to the cone bottom of a spray cone 202, and the cone bottom corresponding to another spray cone offers downstream pressure tappings 103。
And, recess 203 it is additionally provided with between 201 and spray cone 202 in the middle part of described straight section shape, circumferentially disposed around ejectisome 2 of this recess 203, make formation relief area 5 between recess 203 and straight tube body 1 inwall, described upstream pressure tappings 102 and each correspondence of downstream pressure tappings 103 are offered towards recess 203, namely connect relief area 5。The cross section of described recess 203 can be similar sag vertical curve, can also be straight line knuckle, if concave bottom is d2 to the distance of straight tube body 1 inwall, this d2 > d, the approximate angle β of recess 203 of illustrating in Fig. 1 is obtuse angle。
In reality, ejectisome 2 can not setting recess 203, i.e. d2=d, be formed without relief area 5, this is substantially also feasible。
The straight tube body 1 of the present embodiment and the structure of ejectisome 2 be front and back symmetry on fluid flow direction all, to meet the requirement of bidirectional measurement。
During the present embodiment work, as shown in Figure 2, no matter air-flow is to be entered by left end or in right-hand member entrance straight tube body 1, it it is all the compression through airflow concentration compressional zone 4, relief area 5 then through recess 203 place is cushioned, eventually pass the outflow of spray cone 202 and chamfering 101 and lead, air current flow track linearly spurting or near linear spurting are flowed out, and described upstream pressure tappings 102 and downstream pressure tappings 103 connect sensor, the pressure data of sensor acquisition upstream pressure tappings 102 and downstream pressure tappings 103 also resolves, to obtain accurate data on flows。Owing to air-flow is linearly track ejection when the present embodiment uses, add the stability of detection data on flows, it is suppressed that the phenomenon that the flow signal error that causes due to flow trace instability is bigger。
From along airflow direction, first recess 203 is inhibition, it is therefore an objective to adjust the curvature of flow curve, obtains the effective pressure difference used by respirator；And second recess 203 makes cushioning effect for relief area 5。
Embodiment one: shown in Fig. 3-Fig. 7:
A kind of Medical Instruments injecting type flow detector, including body 1 always and be located at the ejectisome 2 in straight tube body 1。It is different in that with embodiment one: shown in Fig. 3, Fig. 4, also include a sprue 3, described straight tube body 1 is arranged in sprue 3, straight tube body 1 is connected support by least one ribs 104 and is connected to sprue 3, in figure, citing is to support with three ribs 104 to be connected to sprue 3, and these three ribs 104 is uniform in the circumference of straight tube body 1。It is provided with upstream cushion chamber 6 at a ribs 104 internal corresponding described upstream pressure tappings 102, corresponding described downstream pressure tappings 103 is provided with downstream cushion chamber 7, upstream cushion chamber 6 and downstream cushion chamber 7 Hu Bu UNICOM, described upstream pressure tappings 102 is through upstream cushion chamber 6 pass-out, and described downstream pressure tappings 103 is through downstream cushion chamber 7 pass-out。Specifically described sprue 3 is provided with upstream detection mouth 301 facing to upstream cushion chamber 6, described sprue 3 is provided with detected downstream mouth 302, upstream detection mouth 301 and detected downstream mouth 302 facing to downstream cushion chamber 7 and connects the sensor of outside。The sectional area of described upstream cushion chamber 6 and volume are more than the sectional area of upstream pressure tappings 102 and volume, and the sectional area of described downstream cushion chamber 7 and volume are more than the sectional area of downstream pressure tappings 103 and volume。
Further, the cross sectional shape of described ribs 104 is oval, as shown in Figure 5；The cross sectional shape of described ribs 104 can also be shuttle shape, as shown in Figure 6；The cross sectional shape of described ribs 104 is Double Diamond, as shown in Figure 7。
Other, with embodiment one, repeat no more here。
Embodiment three: shown in Figure 8:
A kind of Medical Instruments injecting type flow detector, including body 1 always and be located at the ejectisome 2 in straight tube body 1。Be different in that with embodiment two: described ejectisome 2 offer a through hole 205 centrally along fluid flow direction, as runner, make, except the peripheral runner of ejectisome, also to increase runner at the center of ejectisome。The quantity of described through hole 205 is not also limit, it is possible to for multiple。
Above-described embodiment only for technology design and the feature of the present invention are described, its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this, can not limit the scope of the invention with this。All equivalences made according to spirit of the invention change or modify, and all should be encompassed within protection scope of the present invention。
Claims (5)
1. a Medical Instruments injecting type flow detector, it is characterised in that: include body (1) always and the ejectisome (2) being located in straight tube body (1)；Described straight tube body (1) is arranged along fluid flow direction, described ejectisome (2) includes (201) in the middle part of straight section shape and is positioned at the spray cone (202) at (201) two ends in the middle part of straight section shape on fluid flow direction, two spray cone (202) front and back on fluid flow direction are symmetrical, and the cone-apex angle α of described spray cone (202) is 10 °-50 °；The length of described straight tube body (1) is slightly shorter than or is equal to the length of ejectisome (2), makes the summit of two spray cone of ejectisome (2) be positioned at or stretch out in the two-port of straight tube body (1), and is provided with chamfering (101) in the two-port of straight tube body (1)；Airflow concentration compressional zone (4) is formed between (201) in the middle part of the straight section shape of described straight tube body (1) inwall and ejectisome (2)；In the middle part of described straight section shape, the length L of (201) is in the middle part of straight section shape more than 1.2 times of the spacing d of (201) and straight tube body (1) inwall；Described straight tube body (1) offers upstream pressure tappings (102) corresponding to the cone bottom of a spray cone (202), and the cone bottom corresponding to another spray cone offers downstream pressure tappings (103)。
2. Medical Instruments injecting type flow detector according to claim 1, it is characterized in that: in the middle part of described straight section shape, between (201) and spray cone (202), be additionally provided with recess (203), this recess (203) is circumferentially disposed around ejectisome (2), making to be formed between recess (203) and straight tube body (1) inwall relief area (5), described upstream pressure tappings (102) and downstream pressure tappings (103) each correspondence are offered towards recess (203)。
3. Medical Instruments injecting type flow detector according to claim 1 or claim 2, it is characterized in that: also include a sprue (3), described straight tube body (1) is arranged in sprue (3), and straight tube body (1) is connected support by least one ribs (104) and is connected to sprue (3)；Internal corresponding described upstream pressure tappings (102) of described ribs (104) is provided with upstream cushion chamber (6), corresponding described downstream pressure tappings (103) is provided with downstream cushion chamber (7), described upstream pressure tappings (102) is through upstream cushion chamber (6) pass-out, and described downstream pressure tappings (103) is through downstream cushion chamber (7) pass-out；The sectional area of described upstream cushion chamber (6) and volume are more than the sectional area of upstream pressure tappings (102) and volume, and the sectional area in described downstream cushion chamber (7) and volume are more than the sectional area of downstream pressure tappings (103) and volume。
4. Medical Instruments injecting type flow detector according to claim 1, it is characterised in that: in the middle part of described straight section shape, the length L of (201) is in the middle part of straight section shape 2-4 times of the spacing d of (201) and straight tube body (1) inwall。
5. Medical Instruments injecting type flow detector according to claim 4, it is characterised in that: in the middle part of described straight section shape, the length L of (201) is in the middle part of straight section shape 3 times of the spacing d of (201) and straight tube body (1) inwall。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172450.8A CN105698878B (en) | 2016-03-24 | 2016-03-24 | Medical Instruments injecting type flow detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172450.8A CN105698878B (en) | 2016-03-24 | 2016-03-24 | Medical Instruments injecting type flow detector |
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| Publication Number | Publication Date |
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| CN105698878A true CN105698878A (en) | 2016-06-22 |
| CN105698878B CN105698878B (en) | 2019-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610172450.8A Active CN105698878B (en) | 2016-03-24 | 2016-03-24 | Medical Instruments injecting type flow detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3734233A1 (en) * | 2019-04-30 | 2020-11-04 | Fas Medic S.A. | Fluid sensing apparatus |
| WO2023115923A1 (en) * | 2021-12-24 | 2023-06-29 | 广州蓝仕威克医疗科技有限公司 | High-measurement-precision differential pressure flowmeter capable of being repeatedly sterilized |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2108898U (en) * | 1991-12-09 | 1992-07-01 | 王金海 | Standard oxygen flow meter sutitable for test in site |
| US20090139347A1 (en) * | 2007-11-16 | 2009-06-04 | Speldrich Jamie W | Venturi flow sensor |
| CN201463943U (en) * | 2009-07-21 | 2010-05-12 | 上海信东仪器仪表有限公司 | Bidirectional V-cone flowmeter |
| CN102928028A (en) * | 2012-10-31 | 2013-02-13 | 浙江省计量科学研究院 | Full-symmetry double-cone flowmeter |
| CN205580530U (en) * | 2016-03-24 | 2016-09-14 | 苏州鱼跃医疗科技有限公司 | Injection formula flow detection device for medical instruments |
-
2016
- 2016-03-24 CN CN201610172450.8A patent/CN105698878B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2108898U (en) * | 1991-12-09 | 1992-07-01 | 王金海 | Standard oxygen flow meter sutitable for test in site |
| US20090139347A1 (en) * | 2007-11-16 | 2009-06-04 | Speldrich Jamie W | Venturi flow sensor |
| CN201463943U (en) * | 2009-07-21 | 2010-05-12 | 上海信东仪器仪表有限公司 | Bidirectional V-cone flowmeter |
| CN102928028A (en) * | 2012-10-31 | 2013-02-13 | 浙江省计量科学研究院 | Full-symmetry double-cone flowmeter |
| CN205580530U (en) * | 2016-03-24 | 2016-09-14 | 苏州鱼跃医疗科技有限公司 | Injection formula flow detection device for medical instruments |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3734233A1 (en) * | 2019-04-30 | 2020-11-04 | Fas Medic S.A. | Fluid sensing apparatus |
| US11300436B2 (en) | 2019-04-30 | 2022-04-12 | Fas Medic S.A. | Flow laminator |
| WO2023115923A1 (en) * | 2021-12-24 | 2023-06-29 | 广州蓝仕威克医疗科技有限公司 | High-measurement-precision differential pressure flowmeter capable of being repeatedly sterilized |
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| Publication number | Publication date |
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| CN105698878B (en) | 2019-02-26 |
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Inventor after: Zhao Shuai Inventor after: You Jingliang Inventor after: Zheng Shaoming Inventor after: Pan Nengyu Inventor after: Du Wenzhi Inventor after: Zhu Jing Inventor after: Zhang Hongsheng Inventor after: Guo Jianming Inventor before: Du Wenzhi Inventor before: Zhu Jing Inventor before: Zhang Hongsheng Inventor before: Guo Jianming |
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Address after: 212300 Yunyang Industrial Park, Danyang City, Zhenjiang City, Jiangsu Province (south of Zhenxin Road) Patentee after: JIANGSU YUYUE MEDICAL EQUIPMENT& SUPPLY Co.,Ltd. Patentee after: SUZHOU YUWELL MEDICAL TECHNOLOGY Co.,Ltd. Patentee after: SUZHOU MEDICAL APPLIANCE FACTORY Patentee after: JIANGSU YUWELL INFORMATION SYSTEM Co.,Ltd. Address before: 215163 No.9, Jinfeng Road, science and Technology City, high tech Zone, Suzhou City, Jiangsu Province Patentee before: SUZHOU YUWELL MEDICAL TECHNOLOGY Co.,Ltd. Patentee before: SUZHOU MEDICAL APPLIANCE FACTORY Patentee before: JIANGSU YUYUE MEDICAL EQUIPMENT& SUPPLY Co.,Ltd. Patentee before: JIANGSU YUWELL INFORMATION SYSTEM Co.,Ltd. |