CN109771740A - A kind of pneumatic infusion device - Google Patents
A kind of pneumatic infusion device Download PDFInfo
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- CN109771740A CN109771740A CN201910166605.0A CN201910166605A CN109771740A CN 109771740 A CN109771740 A CN 109771740A CN 201910166605 A CN201910166605 A CN 201910166605A CN 109771740 A CN109771740 A CN 109771740A
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- body cavity
- compression chamber
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- compression
- cabinet
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Abstract
The present invention relates to a kind of pneumatic infusion devices, belong to medical instruments field.Cabinet is equipped with cushion chamber and upper and lower access hole, and cabinet is designed with outlet plenum and at least two body cavity groups in two sides up and down, is all sequentially reduced from body cavity quantity contained by hole to the body cavity group portalled is entered；A body cavity in body cavity group is equipped on snout cavity and venthole, other body cavitys and is provided only with venthole；It passes in and out oral cavity and filled valve block constitutes terminal valve in it；Upper cover and bottom plate are mounted in two sides above and below cabinet and piezoelectric actuator is crimped in each body cavity and constitutes compression chamber by sealed circle, and the compression chamber in same body cavity group is simultaneously unified into a compression chamber group；Cabinet up and down two sides enter hole, compression chamber group, outlet plenum and portalling are connected into compression unit, upper and lower compression unit up and down respectively and connect through cushion chamber；The blister cavities of upper cover is provided with air bag and anther sac, and the end of blister cavities is equipped with baffle；Air bag is connected to through appendix with above portalling, and syringe needle and flow valve are housed on the perfusion tube of anther sac.
Description
Technical field
The invention belongs to medical instruments fields, and in particular to a kind of pneumatic infusion device.
Background technique
Drug administration by injection mainly has intravenous injection, intramuscular injection and subcutaneous injection etc..Intravenous injection is also referred to as infusion administration, existing
Infusion device is mostly made of infusion bottle, perfusion tube and infusion support, and infusion bottle is hung on infusion support, is self-possessed by medical fluid and flows
And it is injected into the blood vessel of people through perfusion tube.This infusion mode can bring many problems in actual use: pass through side manually
Method adjusts flow, and flow control accuracy is inadequate；Patient walks about, go to the toilet when need other people to hold infusion bottle high, activity is inconvenient
And it can also make blood backflow when infusion bottle insufficient height；It needs patient or nursing staff to guard for a long time, such as finds not in time defeated
Liquid completion may also result in accident；Medical fluid is contacted with air, and there are also contaminated possibilities when surrounding air is unclean.In addition to above-mentioned
Outside immediate problem, also it can shorten transfusion time by reducing the methods of amount of solution, quickening transfusion speed sometimes, this is not only aggravated
Heart burden, also affects therapeutic effect: intramuscular injection is with subcutaneous injection by drug injection to flesh within the relatively short time
Meat is subcutaneous, and maximum drawback is that blood concentration differs greatly in an injection cycle, is unfavorable for the effective absorption and benefit of drug
With, because are as follows: most drugs have preferred concentration range in human body, when drug concentration is excessively high have toxic side effect, it is too low when
To not have therapeutic effect.Therefore, the microminiature Portable medicine controlled release that the drug injection time can be extended, keep reasonable drug concentration
Device or system is urgently needed for current medical field.
Summary of the invention
The present invention proposes a kind of pneumatic infusion device, and embodiment of the present invention is: cabinet is equipped with cushion chamber and up and down
Access hole, cabinet up and down two sides be designed with outlet plenum and at least two body cavity groups, enter from above hole to above portal and from tripping in hole to
Under body cavity quantity contained by the body cavity group portalled all be sequentially reduced；There is a body cavity to be equipped with snout cavity and outlet in each body cavity group
Hole is provided only with venthole on other body cavitys；Top of the box, the snout cavity of the most body cavity group of quantity containing body cavity is through above entering Kong Yuhuan
Rush chamber connection, the venthole of body cavity group of the minimum number containing body cavity is connected to through outlet plenum with above portalling；The bottom of box, number containing body cavity
The snout cavity for measuring most body cavity groups is connected to tripping in hole, the venthole of the body cavity group of the minimum number containing body cavity through outlet plenum and under
Portal and is connected to cushion chamber；Venthole in same body cavity group is connected to venthole through intercommunicating pore, other two or so adjacent body cavitys
Snout cavity and venthole connection in group: disengaging oral cavity and its interior filled valve block respectively constitute terminal valve, and valve block is cantilever beam
Valve or disc structure；Sealing ring two sides and is crimped in outlet plenum above and below the cabinet by upper cover and bottom plate through screw, upper cover and
Driver is crimped in each body cavity by the sealed circle of bottom plate constitutes compression chamber, and sealing ring is located at driver two sides up and down, driver
For piezoelectric actuator, driver is formed by substrate and piezoelectric piece bonding, actuator surface be coated with insulated paint or be bonded with insulation it is thin
Film；Compression chamber in same body cavity group is simultaneously unified into a compression chamber group；Enter hole, each compression chamber group, outlet plenum on top of the box
Portal on and and be connected into compression unit, the tripping in hole of the bottom of box, each compression chamber group, outlet plenum and under portal and be connected into pushing
Contracting unit, upper and lower compression unit are connected through cushion chamber: in work, same compression chamber group inner driver deformation direction is identical, and two is left
The deformation direction of driver is opposite in right adjacent compression chamber group；The blister cavities of upper cover is provided with air bag and anther sac, the end dress of blister cavities
There is baffle, baffle is placed in the sliding slot of blister cavities side wall；Air bag is connected to through appendix with above portalling, and needle is housed on the perfusion tube of anther sac
Head and flow valve, upper and lower compression unit are first to close flow valve before air bag gas supply, and intracavitary air pressure to be buffered reaches after setting value again
It opens.
By taking infusion device of each compression unit tool there are three compression chamber group as an example, portal from above to above entering hole and under
The body cavity group portalled to tripping in hole is successively defined as body cavity group one, two and three, and inlet valve is successively defined as inlet valve one, two and
Three, compression chamber group is successively defined as compression chamber group one, two and three；Then descend the specific work process of compression unit are as follows: in upper half,
Driver in compression chamber group one and three is bent downwardly, driver is bent upwards in compression chamber group two, the unlatching of inlet valve one and three,
Inlet valve two and outlet valve are closed, and compression chamber group three enters compression chamber group from the gas in external sucking gas, compression chamber group two
One, this is suction process；In lower half, in compression chamber group one and three driver be bent upwards, the driver in compression chamber group two
It is bent downwardly, inlet valve one and three is closed, inlet valve two and outlet valve are opened, and the gas in compression chamber group three enters compression chamber group
Two, the gas in compression chamber group one enters cushion chamber, this is discharge process；In above-mentioned suction and scheduling, gas is successively undergone
It is discharged after the compression of accumulation step by step of compression chamber group three, two and one, output pressure is effectively promoted；Similarly, upper compression unit
Gas is sucked from cushion chamber, is above portalled after the compression of accumulation step by step of experience compression chamber group three, two and one and appendix enters gas
Capsule, to squeeze anther sac output medical fluid, driving voltage of the medical fluid output speed by driver or the flow valve tune on perfusion tube
Section.
In the present invention, the maximum gas pressure of the output of upper and lower compression unit is Pmax=P0ηp{(1+α)/(1-α)[β+(1+
α)/(1-α)]n-1- 1 }, in which: P0It is standard atmospheric pressure to lower compression unit, is the gas pressure in cushion chamber to upper compression unit
Power, ηpFor correction factor, α > 0 is the volume variable quantity of compression chamber and the appearance of compression chamber caused by compression ratio, i.e. driver deforms
Product the ratio between, β > 1 be each adjacent compression chamber group contained by compression chamber ratio of number minimum value, n >=2 be upper and lower compression unit respectively
The quantity of contained compression chamber group；In work, when two adjacent compression chamber groups are interconnected, i.e. valve block is opened therebetween, number containing compression chamber
Measure the volume variable quantity of the volume variable quantity of more compression chamber group not less than the compression chamber group of the negligible amounts containing compression chamber；To obtain
Maximum compression ratio is obtained, the height of compression chamber is equal to the deflection of driver central point, and driver is by equal thickness PZT4 chip and Huang
The height of compression chamber is when copper base is bondedηh、U0Respectively dynamic corrections coefficient and driving
Voltage, d31For piezoelectric constant, hpFor piezoelectric patches thickness, r is compression chamber radius.
Advantage and characteristic: gas pressure can be increased substantially using the method for accumulation compression；Using gas-powered medical fluid, easily
In accurately controlling transfusion speed by driving voltage, without erecting by overhang, it is moved easily and carries；Medical fluid does not connect with air
It touches, phenomena such as medical fluid is contaminated, gas enters blood vessel and backflow of blood will not occur, without guard in real time, securely and reliably.
Detailed description of the invention
Fig. 1 is the structural profile illustration of infusion device in a preferred embodiment of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the structural schematic diagram in a preferred embodiment of the present invention under infusion device working condition；
Fig. 4 is the structural schematic diagram of upper cover in a preferred embodiment of the present invention；
Fig. 5 is the structural schematic diagram of driver in a preferred embodiment of the present invention；
Fig. 6 is the structural schematic diagram of cabinet in a preferred embodiment of the present invention；
Fig. 7 is the top view of Fig. 6.
Specific embodiment
The middle part of cabinet b be equipped with cushion chamber b9, top be equipped with above enter hole b1 and on portal b6, bottom be equipped with tripping in hole b1 '
Portal b6 ' under, and the two sides cabinet b or more are designed with outlet plenum b3 and at least two body cavity group Bi, and hole b1 is entered from above to above portalling
It b6 and is all sequentially reduced from portal under the quantity of body cavity b2 contained by the body cavity group Bi of b6 ' of tripping in hole b1 '；In each body cavity group Bi
There is a body cavity b2 to be equipped on snout cavity b4 and venthole b5, other body cavity b2 and is provided only with venthole b8；At the top of cabinet b,
The snout cavity b4 of the most body cavity group Bi of the quantity of b2 containing body cavity above entered hole b1 be connected to cushion chamber b9, the minimum number of b2 containing body cavity
The venthole b5 of body cavity group Bi be connected to through outlet plenum b3 with the b6 that above portals；The bottom cabinet b, the most body cavity of the quantity of b2 containing body cavity
The snout cavity b4 of group Bi is connected to tripping in hole b1 ', the venthole b5 of the body cavity group Bi of the minimum number of b2 containing body cavity is through outlet plenum b3
The b6 ' that portals under is connected to cushion chamber b9；Venthole b5 in same body cavity group Bi is connected to venthole b8 through intercommunicating pore b7,
Snout cavity b4 in its two or so adjacent body cavity group Bi is connected to venthole b5；Snout cavity b4 and outlet plenum b3 and its in pacified
The valve block v of dress respectively constitutes inlet valve vi and outlet valve V, and valve block v is cantilever valve or disc structure；Upper cover a and bottom plate c are through spiral shell
Nail is mounted on the two sides up and down of cabinet b and sealing ring is crimped in outlet plenum b3, and upper cover a and the sealed circle of bottom plate c will drive
Device d, which is crimped in each body cavity b2, constitutes compression chamber C, and sealing ring is located at the two sides driver d or more, and driver d is piezoelectric actuator,
Driver d is bonded by substrate d1 and piezoelectric patches d2, and the surface driver d is coated with insulated paint or is bonded with insulation film: same
Compression chamber C in body cavity group Bi is simultaneously unified into a compression chamber group Ci；Enter hole b1, each compression chamber group Ci, outlet at the top of cabinet b
Chamber b3 and on the b6 that portals be connected into compression unit I, the tripping in hole b1 ' of the bottom cabinet b, each compression chamber group Ci, outlet plenum b3 and
Under the b6 ' that portals be connected into lower compression unit II, upper and lower compression unit I and II connects through cushion chamber b9；In work, same compression chamber
The deformation direction of group Ci inner driver d is identical, and the deformation direction of driver d is opposite in two or so adjacent compression chamber group Ci；Upper cover a
Blister cavities a1 be provided with air bag y1 and anther sac y2, the end of blister cavities a1 is equipped with baffle z, and baffle z is placed in the sliding slot of blister cavities a1 side wall
In a2；Air bag y1 is connected to through appendix with the b6 that above portals, and syringe needle and flow valve m are housed on the perfusion tube q of anther sac y2, compressed up and down
Unit I and II, which are that air bag y1 gas supply is preceding, first closes flow valve m, and air pressure is then turned on after reaching setting value in chamber b9 to be buffered.
In the present invention, body cavity group Bi, inlet valve vi, the i representative in compression chamber group Ci portal from above b6 to above enter hole b1 or
Under portal b6 ' arrive tripping in hole b1 ' serial number, i=1,2,3 ...；With each compression unit tool, there are three compression chamber group Ci's
For infusion device, then the b6 that portals from above is to above entering hole b1 and the body cavity group Bi for the b6 ' to tripping in hole b1 ' that portals from down is successively defined
Successively be defined as one v1 of inlet valve, two v2 and three v3 for one B1 of body cavity group, two B2 and three B3, inlet valve vi, compression chamber group Ci according to
It is secondary to be defined as one C1 of compression chamber group, two C2 and three C3；Then descend the specific work process of compression unit II are as follows: in upper half, compression
Driver d in chamber group one C1 and three C3 is bent downwardly, driver d is bent upwards in two C2 of compression chamber group, one v1 of inlet valve and
Three v3 are opened, inlet valve two v2 and outlet valve V are closed, and three C3 of compression chamber group is out of outside sucking gas, two C2 of compression chamber group
Gas enters one C1 of compression chamber group, this is suction process；In lower half, driver d is bent up in compression chamber group one C1 and three C3
Driver d bent, in two C2 of compression chamber group is bent downwardly, and inlet valve one v1 and three v3 are closed, inlet valve two v2 and outlet valve V are opened
It opens, the gas in three C3 of compression chamber group enters two C2 of compression chamber group, and the gas in one C1 of compression chamber group enters cushion chamber b9, this is
Discharge process；In above-mentioned suction and scheduling, gas successively undergoes the accumulation pressure step by step of three C3 of compression chamber group, two C2 and a C1
It is discharged after contracting, output pressure is effectively promoted；Similarly, upper compression unit I sucks gas from cushion chamber b9, undergoes compression chamber
Three C3 of group, two C2 and a C1 the compression of accumulation step by step after above portalled b6 and appendix enters air bag y1, to squeeze anther sac y2
Medical fluid is exported, medical fluid output speed is adjusted by the driving voltage of driver d or the flow valve m on perfusion tube q.
In the present invention, the maximum gas pressure of the output of upper and lower compression unit I and II is Pmax=P0ηp{(1+α)/(1-α)
[β+(1+α)/(1-α)]n-1- 1 }, in which: P0It is standard atmospheric pressure to lower compression unit I, is cushion chamber to upper compression unit II
Gas pressure in b9, ηpFor correction factor, α > 0 is the volume variation of compression chamber C caused by compression ratio, i.e. driver d deformation
The ratio between the volume of amount and compression chamber C, β > 1 are the minimum value of compression chamber C ratio of number contained by each adjacent compression chamber group Ci, n >=2
For the quantity of compression chamber group Ci in upper compression unit I or lower compression unit II；In work, two adjacent compression chamber group Ci phases are interconnected
When logical, i.e. therebetween valve block v is opened, the volume variable quantity of a fairly large number of compression chamber group Ci of C containing compression chamber is not less than C containing compression chamber
The volume variable quantity of the compression chamber group Ci of negligible amounts；To obtain maximum compression ratio, the height of compression chamber C is equal in driver d
The deflection of heart point, the height of compression chamber C is when driver d is formed by equal thickness PZT4 chip with brass substrate bondingηh、U0Respectively dynamic corrections coefficient and driving voltage, d31For piezoelectric constant, hpFor piezoelectric patches d2
Thickness, r be compression chamber C radius.
Claims (1)
1. a kind of pneumatic infusion device, it is characterised in that: cabinet is equipped with cushion chamber and upper and lower access hole, and the upper and lower two sides of cabinet are all
Equipped with outlet plenum and at least two body cavity groups, body cavity contained by hole to the body cavity group above portalled and portalled from tripping in hole under is entered from above
Quantity is all sequentially reduced；There is a body cavity to be equipped with snout cavity and venthole in each body cavity group, is provided only on other body cavitys logical
Stomata；Disengaging oral cavity and its interior filled valve block respectively constitute terminal valve；Upper cover and bottom plate are mounted in cabinet or more two sides and will be close
Seal is crimped in outlet plenum, and piezoelectric actuator is crimped in each body cavity by the sealed circle of upper cover and bottom plate constitutes compression chamber, close
Seal is located at driver two sides up and down；Compression chamber in same body cavity group is simultaneously unified into a compression chamber group；Enter on top of the box
Hole, each compression chamber group, outlet plenum and on portal and be connected into compression unit, the tripping in hole of the bottom of box, each compression chamber group, outlet
Chamber and under portal and be connected into lower compression unit, upper and lower compression unit is connected through cushion chamber；In work, driving in same compression chamber group
Device deformation direction is identical, and the deformation direction of driver is opposite in two or so adjacent compression chamber groups；The blister cavities of upper cover is provided with air bag
And anther sac, blister cavities end are equipped with baffle；Air bag is connected to through appendix with above portalling, and syringe needle and flow are housed on the perfusion tube of anther sac
Valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910166605.0A CN109771740B (en) | 2019-03-01 | 2019-03-01 | Pneumatic infusion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910166605.0A CN109771740B (en) | 2019-03-01 | 2019-03-01 | Pneumatic infusion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109771740A true CN109771740A (en) | 2019-05-21 |
| CN109771740B CN109771740B (en) | 2020-11-27 |
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ID=66487338
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910166605.0A Active CN109771740B (en) | 2019-03-01 | 2019-03-01 | Pneumatic infusion device |
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| Country | Link |
|---|---|
| CN (1) | CN109771740B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354823A (en) * | 1998-11-06 | 2002-06-19 | 霍尼韦尔有限公司 | Electrostatically actuated pumping array |
| US20050118035A1 (en) * | 2003-11-27 | 2005-06-02 | Aisin Seiki Kabushiki Kaisha | Multistage dry vacuum pump |
| CN201299856Y (en) * | 2008-11-27 | 2009-09-02 | 李德芬 | Soft-packing liquid fast infusion pressurizer |
| CN101839392A (en) * | 2009-03-20 | 2010-09-22 | 动力科技发展有限公司 | High compressed air cylinder filling machine |
| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
-
2019
- 2019-03-01 CN CN201910166605.0A patent/CN109771740B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354823A (en) * | 1998-11-06 | 2002-06-19 | 霍尼韦尔有限公司 | Electrostatically actuated pumping array |
| US20050118035A1 (en) * | 2003-11-27 | 2005-06-02 | Aisin Seiki Kabushiki Kaisha | Multistage dry vacuum pump |
| CN201299856Y (en) * | 2008-11-27 | 2009-09-02 | 李德芬 | Soft-packing liquid fast infusion pressurizer |
| CN101839392A (en) * | 2009-03-20 | 2010-09-22 | 动力科技发展有限公司 | High compressed air cylinder filling machine |
| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
Non-Patent Citations (1)
| Title |
|---|
| 刘国君: "《中国优秀博硕士学位论文全文数据库(博士)工程科技Ⅱ辑》", 15 May 2007 * |
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| CN109771740B (en) | 2020-11-27 |
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