CN201181249Y - Pressure detection mechanism of injector pump - Google Patents
Pressure detection mechanism of injector pump Download PDFInfo
- Publication number
- CN201181249Y CN201181249Y CNU2008200791811U CN200820079181U CN201181249Y CN 201181249 Y CN201181249 Y CN 201181249Y CN U2008200791811 U CNU2008200791811 U CN U2008200791811U CN 200820079181 U CN200820079181 U CN 200820079181U CN 201181249 Y CN201181249 Y CN 201181249Y
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- Prior art keywords
- pressure detection
- leading screw
- syringe pump
- support
- pump pressure
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Abstract
The utility model discloses a pressure detection mechanism of a syringe pump, which comprises an injection propulsion device movably arranged on a frame and including a screw and a gear fixed on the screw and driven by a step motor, wherein both ends of the screw is movably arranged on the frame; a support reed and a reset spring are arranged on the frame; the both ends of the screw respectively butt against the support reed and the reset spring; a magnetic steel is fixed on the support reed; and a Hall sensor is arranged on the magnetic steel. The Hall sensor is used for detecting the displacement change of the screw during injection to achieve clogging monitor and alarm. Meanwhile, the work state of the pump control system is changed to ensure safe transfusion, and the pressure detection mechanism has simple structure and high safety.
Description
Technical field
The utility model relates to a kind of medicine equipment, relates in particular to a kind of syringe pump pressure detection mechanism.
Background technology
At present, domestic each hospital progressively promotes the use of syringe pump and realizes injection automatically in the clinical vein injection.Because it has many good qualities, and is subjected to generally liking of people.But in the clinical injection process, choking phenomenon might appear in infusion pipeline, causes that amount of infusion and prevalue are not inconsistent, and like this, can damage patient.Take place for fear of this kind accident, in injection process, must monitor choking phenomenon at any time, in time find, get rid of immediately.
In the prior art, block the phenomenon must cause that infusion pressure raises according to infusion pipeline, the method for utilizing pressure transducer directly to detect infusion pressure goes to realize the purpose of reporting to the police, and changes the duty of pump control system simultaneously, guarantees the safety of infusing.
There is following shortcoming at least in above-mentioned prior art: detection system complexity, security are not high.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, safe syringe pump pressure detection mechanism.
The purpose of this utility model is achieved through the following technical solutions:
Syringe pump pressure detection of the present utility model mechanism comprises support, and the injection propulsion plant is equipped with in activity on the described support, and the support of described injection propulsion plant one end is provided with displacement transducer.
The technical scheme that provides by above-mentioned the utility model as can be seen, syringe pump pressure detection described in the utility model mechanism because the injection propulsion plant is equipped with in activity on the support, the support of injection propulsion plant one end is provided with displacement transducer.When injection propulsion plant promotion syringe pump is infused, if blocking the propelling power that must cause the injection propulsion plant, infusion pipeline increases, when propelling power reacts on the injection propulsion plant, can cause that the injection propulsion plant produces a spot of displacement, displacement transducer can detect the variation of this displacement, realizes the purpose of monitoring choking phenomenon, warning, changes the duty of pump control system simultaneously, guarantee the safety of infusing, simple in structure, safe.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment of the utility model syringe pump pressure detection mechanism;
Fig. 2 is the process flow diagram that the specific embodiment of the utility model syringe pump pressure detection mechanism is realized pressure detection.
Embodiment
Syringe pump pressure detection of the present utility model mechanism, preferable embodiment comprises support 10 as shown in Figure 1, and the injection propulsion plant is equipped with in activity on the support 10, and the support of injection propulsion plant one end is provided with displacement transducer 3.When injection propulsion plant promotion syringe pump is infused, if blocking the propelling power that must cause the injection propulsion plant, infusion pipeline increases, when propelling power reacts on the injection propulsion plant, can cause that the injection propulsion plant produces a spot of displacement, displacement transducer can detect the variation of this displacement, realize the purpose of monitoring choking phenomenon, warning, change the duty of pump control system simultaneously, guarantee the safety of infusing.
Concrete injection propulsion plant can comprise leading screw 7, and the two ends activity of leading screw 7 is loaded on the support 10, and displacement transducer 3 is positioned at an end of leading screw 7.Leading screw 7 is connected with drive unit, drive unit can comprise the gear 6 that is fixed on the leading screw 7, also comprise the stepper motor (not shown), stepper motor drives leading screw 7 by gear 6 and rotates, leading screw 7 can mesh in syringe pump, leading screw 7 promotes the syringe pump (not shown) when rotating and advances, and realizes injection.The axial displacement that displacement transducer 3 detects leading screw 7 changes, and realizes the monitoring obstruction.Drive unit also can pass through the kinds of drive such as chain, belt and drive leading screw 7 rotations.
Support 10 is provided with supporting spring 1 and back-moving spring 9, and the two ends of leading screw 7 are against respectively on supporting spring 1 and the back-moving spring 9, can be respectively equipped with steel ball 8 between the two ends of leading screw 7 and supporting spring 1 and the back-moving spring 9.
Be fixed with magnet steel 2 on the supporting spring 1, displacement transducer 3 is positioned near the magnet steel 3.Magnet steel 2 produces magnetic induction B, and displacement transducer 3 is experienced the variable quantity of magnetic induction B and realized displacement measurement; Displacement transducer 3 can be Hall element.
Can also be provided with radome 4 on the support 10, displacement transducer 3 and supporting spring 1 are positioned at radome 4, are used to avoid magnetic field to disturb mutually.
As shown in Figure 2, principle of work of the present utility model is,
At first syringe pump is installed readyly, stepper motor does not start, and at this moment, leading screw 7 is not subjected to acting force, and back-moving spring 9 is in zero-bit, Hall element output total null voltage signal.
When stepper motor drove leading screw 7 rotations by gear 6, the load (syringe pump) that is engaged in leading screw 7 was moved to the left, and produces injection pressure P, leading screw 7 is subjected to an opposite force F simultaneously, when ignoring damping and dynamic effects, the relation of opposite force F and pressure P can be represented by the formula:
F≌k
fp------------(1)
Opposite force F acts on the back-moving spring 9 by leading screw 7, and the generation microdisplacement Δ L relevant with opposite force F, that is:
ΔL≌k
lF------------(2)
Because the effect of following of supporting spring 1 has changed the relative position of leading screw 7 with Hall element, cause that the output voltage U of Hall element changes,
U≌k
uΔL------------(3)
Formula and after mathematics manipulation, can obtaining to sum up:
U＝kp------------(4)
In the formula: k=k
fk
lk
u------------------(5)
Each coefficient can obtain by demarcating, handle the back in the following formula.
From formula (4) as seen, the output voltage U of Hall element and injection pressure P are linear.System can realize pressure alarm according to the output voltage values of Hall element.
When injection finished, stepper motor stopped operating, and two kinds of possibility states are arranged: a kind of is that syringe stops to advance, but pressure release not yet, at this moment, back-moving spring still remains on the end-of-job position; Another kind of state is that syringe is laid down pressure, at this moment, under action of reset spring, resets to standby condition.
The utility model detects the injection propulsion plant by displacement transducer and produces a spot of change in displacement, realizes the purpose of monitoring choking phenomenon, warning, changes the duty of pump control system simultaneously, guarantees the safety of infusing, and is simple in structure, safe.
The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.
Claims (7)
1, a kind of syringe pump pressure detection mechanism comprises support, it is characterized in that the injection propulsion plant is equipped with in activity on the described support, and the support of described injection propulsion plant one end is provided with displacement transducer.
2, syringe pump pressure detection according to claim 1 mechanism, it is characterized in that described injection propulsion plant comprises leading screw, described leading screw is connected with drive unit, the two ends activity of described leading screw is loaded on the described support, and described displacement transducer is positioned at an end of described leading screw.
3, syringe pump pressure detection according to claim 2 mechanism is characterized in that described drive unit comprises the gear that is fixed on the described leading screw, also comprises stepper motor.
4, syringe pump pressure detection according to claim 2 mechanism, it is characterized in that, described support is provided with supporting spring and back-moving spring, the two ends of described leading screw are against respectively on described supporting spring and the back-moving spring, be fixed with magnet steel on the described supporting spring, described displacement transducer is positioned near the described magnet steel.
5, syringe pump pressure detection according to claim 4 mechanism is characterized in that described displacement transducer is a Hall element.
6, syringe pump pressure detection according to claim 4 mechanism is characterized in that described support is provided with radome, and described displacement transducer and described supporting spring are positioned at described radome.
7, syringe pump pressure detection according to claim 4 mechanism is characterized in that, is respectively equipped with steel ball between the two ends of described leading screw and described supporting spring and the back-moving spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200791811U CN201181249Y (en) | 2008-02-25 | 2008-02-25 | Pressure detection mechanism of injector pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200791811U CN201181249Y (en) | 2008-02-25 | 2008-02-25 | Pressure detection mechanism of injector pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201181249Y true CN201181249Y (en) | 2009-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200791811U Expired - Lifetime CN201181249Y (en) | 2008-02-25 | 2008-02-25 | Pressure detection mechanism of injector pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN201181249Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410913A (en) * | 2011-07-26 | 2012-04-11 | 北京鑫禾丰医疗技术有限公司 | Blockage detection device |
| CN101549183B (en) * | 2009-04-29 | 2012-08-22 | 深圳市安特高科实业有限公司 | High-pressure safe injection method and system |
| CN103055377A (en) * | 2011-10-19 | 2013-04-24 | 北京谊安医疗系统股份有限公司 | Detection method and device for blocking infusion pump |
| CN105067180A (en) * | 2015-08-04 | 2015-11-18 | 深圳康罗技术有限公司 | Device and method for detecting blocking pressure of injection pump |
| CN105319003A (en) * | 2015-11-13 | 2016-02-10 | 南京感控通化工产品经营部 | Device and method for measuring pressure of high pressure injector |
| WO2019052111A1 (en) * | 2017-09-12 | 2019-03-21 | 美敦力公司 | Fluid infusion device and driving system therefor |
-
2008
- 2008-02-25 CN CNU2008200791811U patent/CN201181249Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549183B (en) * | 2009-04-29 | 2012-08-22 | 深圳市安特高科实业有限公司 | High-pressure safe injection method and system |
| CN102410913A (en) * | 2011-07-26 | 2012-04-11 | 北京鑫禾丰医疗技术有限公司 | Blockage detection device |
| CN102410913B (en) * | 2011-07-26 | 2015-01-21 | 刘仲馨 | Blockage detection device |
| CN103055377A (en) * | 2011-10-19 | 2013-04-24 | 北京谊安医疗系统股份有限公司 | Detection method and device for blocking infusion pump |
| CN105067180A (en) * | 2015-08-04 | 2015-11-18 | 深圳康罗技术有限公司 | Device and method for detecting blocking pressure of injection pump |
| CN105319003A (en) * | 2015-11-13 | 2016-02-10 | 南京感控通化工产品经营部 | Device and method for measuring pressure of high pressure injector |
| WO2019052111A1 (en) * | 2017-09-12 | 2019-03-21 | 美敦力公司 | Fluid infusion device and driving system therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING EASTERN CHIEFTAIN SCIENCE AND TECHNOLOGY C Free format text: FORMER NAME: DONGFANG CHENGYITONG SCI. + TECH. DEV. CENTER, BEIJING |
|
| CP03 | Change of name, title or address |
Address after: 100094, 819, 8 new venture building, No. 7 Feng Hui Road, Beijing, Haidian District Patentee after: Beijing Dongfang Chengyitong Technology Co., Ltd. Address before: 102204 Changping District Stream Village Industrial Park, Beijing Patentee before: Dongfang Chengyitong Sci. & Tech. Dev. Center, Beijing |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090114 |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Dongfang Chengyitong Technology Co., Ltd. Document name: Notification of Expiration of Patent Right Duration |