CN109821103A - A kind of injecting systems of piezoelectric pile driving - Google Patents
A kind of injecting systems of piezoelectric pile driving Download PDFInfo
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- CN109821103A CN109821103A CN201910191940.6A CN201910191940A CN109821103A CN 109821103 A CN109821103 A CN 109821103A CN 201910191940 A CN201910191940 A CN 201910191940A CN 109821103 A CN109821103 A CN 109821103A
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Abstract
The present invention relates to a kind of injecting systems of piezoelectric pile driving, belong to medical instruments field.For main body on pedestal, syringe is mounted in the barrel chamber end of main body, and piston is placed in syringe, and the push rod of piston is placed in barrel chamber；Bottom part body is equipped at least two guide hole groups being made of guide hole and what is be connected to barrel chamber portal；Base top is equipped with into hole, outlet plenum and distinguishes equal body cavity group and body cavity with guide hole group and its contained guide hole quantity, and body cavity is equal with the diameter of guide hole；Only one body cavity is equipped with snout cavity and venthole in each body cavity group, is provided only with venthole on other body cavitys；Disengaging oral cavity and the valve block in it respectively constitute terminal valve；Set diaphragm between main body and pedestal, outlet plenum is connected to through the through-hole on diaphragm with portalling；Diaphragm and body cavity and inlet valve constitute compression chamber, and the compression chamber in same body cavity group is simultaneously unified into compression chamber group, each compression chamber group series connection；Piston is crimped on diaphragm by the piezoelectric pile in guide hole, and piston is T-type structure and its small end and membrane contacts.
Description
Technical field
The invention belongs to medical instruments fields, and in particular to a kind of injecting systems of piezoelectric pile driving.
Background technique
Existing 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 hanging is self-possessed on infusion support, by medical fluid
It flows and is injected into the blood vessel of people through perfusion tube.This infusion mode can bring many problems in actual use: pass through hand
Dynamic 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 not
Blood backflow can also be made when convenient and infusion bottle insufficient height；It needs patient or nursing staff to guard for a long time, such as sends out not in time
Now infusion is completed to 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
Outside above-mentioned immediate problem, also it can shorten transfusion time by reducing the methods of amount of solution, quickening transfusion speed sometimes, this not only adds
Weighed heart burden, also affected therapeutic effect: intramuscular injection is with subcutaneous injection by drug injection within the relatively short time
To muscle or subcutaneously, maximum drawback is that blood concentration differs greatly in an injection cycle, is unfavorable for effective absorption of drug
With utilization, because are as follows: most drugs have preferred concentration range in human body, when drug concentration is excessively high have toxic side effect, mistake
To not have therapeutic effect when low.Therefore, the microminiature Portable medicine that the drug injection time can be extended, keep reasonable drug concentration
Controlled-release device or system are urgently needed for current medical field.
Summary of the invention
The present invention proposes a kind of injecting systems of piezoelectric pile driving, and embodiment of the present invention is: main body is installed through screw
On pedestal, the syringe of syringe is mounted in the barrel chamber end of body top through screw thread, and piston is placed in syringe and constitutes with syringe
Gasket is equipped between the side wall of medicine cavity, syringe and barrel chamber；The push rod of piston is placed in barrel chamber, equipped with band flow valve and needle on syringe
The perfusion tube of head；Bottom part body is equipped at least two guide hole groups being made of guide hole and what is be connected to barrel chamber portal, from a left side to
The quantity of contained guide hole is successively reduced in right each guide hole group；Base top be equipped with into hole, outlet plenum and with guide hole group and its contained
Guide hole quantity distinguishes equal body cavity group and body cavity, and body cavity is equal with the diameter of guide hole；It is set on only one body cavity in each body cavity group
There are snout cavity and venthole, is provided only with venthole on other body cavitys；Snout cavity in the body cavity group of the leftmost side is connected to hole is entered, most right
Venthole in lateral body chamber group is connected to outlet plenum；Venthole in same body cavity group is connected to through intercommunicating pore with venthole, and two is left
Snout cavity in right adjacent body cavity group is connected to venthole；Disengaging oral cavity and the valve block installed in it respectively constitute inlet and outlet
Valve, valve block are cantilever valve or disc valve；Diaphragm is set between main body and pedestal, guide hole and body cavity balanced configuration are in diaphragm two sides, out
Oral cavity is connected to through the through-hole on diaphragm with portalling；It is equipped with sealing ring, diaphragm and body cavity between diaphragm and pedestal and inlet valve is constituted and pressed
Contracting chamber, compression chamber in same body cavity group are simultaneously unified into compression chamber group, each compression chamber group series connection；Piezoelectric pile in guide hole is by piston pressure
It connects on diaphragm, piston is T-type structure and its small end is contacted with membrane contacts, big end side wall with guide hole inner wall；It is same in work
The deformation direction of compression chamber group septation is identical, piezoelectric pile elongates or shortens in i.e. same guide hole group, two adjacent compression chamber groups
The deformation direction of septation is opposite.
For having the injecting systems there are three compression chamber group, from right to left, guide hole group is successively defined as guide hole group one, two
With three, body cavity group 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
It is successively defined as compression chamber group one, two and three, then specific work process are as follows: the piezoelectric pile in upper half, in guide hole group one and three
Shorten, the piezoelectric pile elongation in guide hole group two, the volume of compression chamber group one and three increases, two volume of compression chamber group reduces, import
Valve one and three is opened, inlet valve two and outlet valve are closed, and compression chamber group one and three sucks gas, gas is discharged in compression chamber group two,
This is suction process；In lower half, piezoelectric pile shortens in the piezoelectric pile elongation, guide hole group two in guide hole group one and three, compression chamber
One and three volumes of group reduce, two volume of compression chamber group increases, and inlet valve one and three is closed, inlet valve two and outlet valve are opened, pressure
Gas is discharged in contracting chamber group one and three, compression chamber group two sucks gas, this is discharge process；In above-mentioned sucking and discharge process, gas
Body experienced the compression of accumulation step by step of compression chamber group three, two and one, and output pressure improves step by step；Gas after step by step compression is through going out
Hole enters barrel chamber and pushes piston that the medical fluid in medicine cavity is forced to export, the output speed of medical fluid by the driving voltage of piezoelectric pile or
Flow valve control on perfusion tube: the syringe more renewed after medical fluid end of output.
In the present invention, the maximum gas storage pressure in barrel chamber is Pmax=P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-
1 }, in which: P0For standard atmospheric pressure, ηpFor efficiency factor, α > 0 is compression ratio, i.e. compression caused by piezoelectric pile dilatation
The ratio between volume variable quantity and the volume of compression chamber of chamber, β > 1 are the minimum of contained compression chamber quantity ratio in each adjacent compression chamber group
Value, n >=2 are compression chamber group quantity；To obtain maximum compression ratio, when beryllium-bronze of diaphragm 0.1,0.2 and 0.3mm thickness, is optimal
Piston small end and big end radius ratio are respectively 0.79,0.65 and 0.55, and compression chamber height is the elongation that piezoelectric pile is acted on by voltage
Amount；When two adjacent compression chamber groups are interconnected, valve block i.e. therebetween is opened, the volume of a fairly large number of compression chamber group containing compression chamber
Volume variable quantity of the variable quantity not less than the compression chamber group of the negligible amounts containing compression chamber.
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 schematic diagram of injecting systems 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 injecting systems working condition；
Fig. 4 is the structural schematic diagram of main body in a preferred embodiment of the present invention；
Fig. 5 is the bottom view of Fig. 4；
Fig. 6 is the structural schematic diagram of pedestal in a preferred embodiment of the present invention；
Fig. 7 is the top view of Fig. 6.
Specific embodiment
Main body a is mounted on pedestal c through screw, barrel chamber a1 end of the syringe z1 of syringe z through screw thread at the top of main body a
Portion, piston z2 are placed in syringe z1 and constitute medicine cavity z3 with syringe z1, and gasket x is equipped between syringe z1 and the side wall of barrel chamber a1；
The push rod of piston z2 is placed in barrel chamber a1, and the perfusion tube q of flow valve m and syringe needle is provided on syringe z1；The bottom of main body a is set
There are at least two guide hole group Ai being made of the guide hole a2 and a3 that portals being connected to barrel chamber a1, from left to right in each guide hole group Ai
The quantity of contained guide hole a2 is successively reduced；The top of pedestal c be equipped with into hole c1, outlet plenum c6 and with guide hole group Ai and its contained lead
Hole a2 quantity distinguishes equal body cavity group Ci and body cavity c2, and body cavity c2 is equal with the diameter of guide hole a2, only one in each body cavity group Ci
A body cavity c2 is equipped on snout cavity c4 and venthole c5, other body cavity c2 and is provided only with venthole c8；In the body cavity group Ci of the leftmost side
Snout cavity c4 be connected to hole c1 is entered, the venthole c5 in the body cavity group Ci of the rightmost side is connected to outlet plenum c6；Same body cavity group Ci
In venthole c5 be connected to through intercommunicating pore c9 with venthole c8, the snout cavity c4 and venthole c5 in two or so adjacent body cavity group Ci
Connection；Snout cavity c4 and outlet plenum c6 and the valve block t installed in it respectively constitute inlet valve vi and outlet valve v, and valve block t is outstanding
Arm beam valve or disc valve；Diaphragm g, guide hole a2 and body cavity c2 balanced configuration are set between main body a and pedestal c in the two sides up and down of diaphragm g,
Outlet plenum c6 is connected to through the through-hole on diaphragm g with the a3 that portals；Be equipped with sealing ring between diaphragm g and pedestal c, diaphragm g and body cavity c2 and
Inlet valve vi constitutes compression chamber Y；Compression chamber Y in same body cavity group Ci is simultaneously unified into compression chamber group Yi, each compression chamber group Yi series connection；
Piston e is crimped on diaphragm g by the piezoelectric pile d in guide hole a2, piston e be T-type structure and its small end contacted with diaphragm g, big end
Side wall is contacted with the inner wall of guide hole a2；In work, the deformation direction of same compression chamber group Yi septation g is identical, i.e. same guide hole
Piezoelectric pile d is elongated or shortened in group Ai, and the deformation direction of two adjacent compression chamber group Yi septation g is opposite.
In the present invention, guide hole group Ai, body cavity group Ci, inlet valve vi, the i in compression chamber group Yi represent sequence from right to left
Number, i=1,2,3 ...；For having the injecting systems there are three compression chamber group Yi, from right to left, guide hole group Ai is successively defined
For one A1 of guide hole group, two A2 and three A3, body cavity group Ci is successively defined as one C1 of body cavity group, two C2 and three C3, and inlet valve vi is successively
One v1 of inlet valve, two v2 and three v3 are defined as, compression chamber group Yi is successively defined as one Y1 of compression chamber group, two Y2 and three Y3, then has
Body running process are as follows: in upper half, the piezoelectric pile d in guide hole group one A1 and three A3 shortens, the piezoelectric pile in two A2 of guide hole group is stretched
Long, the volume of compression chamber group one Y1 and three Y3 increase, two Y2 volume of compression chamber group reduces, inlet valve one v1 and three v3 open, into
Mouth valve two v2 and outlet valve v are closed, and compression chamber group one Y1 and three Y3 suck gas, gas is discharged in two Y2 of compression chamber group, this is suction
Enter process；In lower half, the piezoelectric pile in piezoelectric pile d elongation, two A2 of guide hole group in guide hole group one A1 and three A3 shortens, compression
The volume of chamber group one Y1 and three Y3 reduce, two Y2 volume of compression chamber group increases, inlet valve one v1 and three v3 closing, two v2 of inlet valve
It is opened with outlet valve v, gas is discharged in compression chamber group one Y1 and three Y3, two Y2 of compression chamber group sucks gas, this is discharge process；On
State in sucking and discharge process, gas experienced three Y3 of compression chamber group, two Y2 and a Y1 accumulation step by step compression, output pressure by
Grade improves；Gas after step by step compression enters barrel chamber a1 through the a3 that portals and pushes piston z2 that the medical fluid in medicine cavity z3 is forced to export,
The output speed of medical fluid passes through the driving voltage of piezoelectric pile d or the control of the flow valve m on perfusion tube q；After medical fluid end of output more
The syringe z renewed.
In the present invention, the maximum gas storage pressure in barrel chamber a1 is Pmax=P0ηp{(1+α)/(1-α)[β+(1+α)/(1-α)]n-1-
1 }, in which: P0For standard atmospheric pressure, ηpFor efficiency factor, α > 0 is compression ratio, i.e. compression caused by piezoelectric pile d dilatation
The volume variable quantity of chamber Y and the ratio between the volume of compression chamber Y, β > 1 are contained compression chamber Y quantity ratio in each adjacent compression chamber group Yi
Minimum value, n >=2 be compression chamber group Yi quantity；To obtain maximum compression ratio, diaphragm g is the beryllium of 0.1,0.2 and 0.3mm thickness
Optimal piston e small end and big end radius ratio are respectively 0.79,0.65 and 0.55 when bronze, compression chamber height be piezoelectric pile d by
The elongation of voltage effect；Two adjacent compression chamber group Yi are interconnected, valve block t i.e. therebetween unlatching when, the quantity of Y containing compression chamber compared with
Volume variable quantity of the volume variable quantity of more compression chamber group Yi not less than the compression chamber group Yi of the negligible amounts of Y containing compression chamber.
Claims (1)
1. a kind of injecting systems of piezoelectric pile driving, it is characterised in that: for main body on pedestal, the syringe of syringe is mounted in main body
The barrel chamber end at top, piston are placed in syringe, and the push rod of piston is placed in barrel chamber, equipped with flow valve and syringe needle on syringe
Perfusion tube；Bottom part body is equipped at least two guide hole groups being made of guide hole and what is be connected to barrel chamber portal, from left to right respectively
The quantity of contained guide hole is successively reduced in guide hole group；Base top be equipped with into hole, outlet plenum and with guide hole group and its contained guide hole
Quantity distinguishes equal body cavity group and body cavity, and body cavity is equal with the diameter of guide hole；In each body cavity group only one body cavity be equipped with into
Oral cavity and venthole are provided only with venthole on other body cavitys；Snout cavity in the body cavity group of the leftmost side is connected to hole is entered, rightmost side body
Venthole in chamber group is connected to outlet plenum；Venthole in same body cavity group is connected to through intercommunicating pore with venthole, two or so phases
Snout cavity in adjacent body cavity group is connected to venthole；Disengaging oral cavity and the valve block installed in it respectively constitute terminal valve；It is main
Diaphragm, guide hole and body cavity balanced configuration are set between body and pedestal in diaphragm two sides, outlet plenum is connected to through the through-hole on diaphragm with portalling；
Diaphragm and body cavity and inlet valve constitute compression chamber, and the compression chamber in same body cavity group is simultaneously unified into compression chamber group, each compression chamber group string
Connection；Piston is crimped on diaphragm by the piezoelectric pile in guide hole, and piston is T-type structure and its small end and membrane contacts, diaphragm are
0.1, piston small end and big end radius ratio are respectively 0.79,0.65 and 0.55 when the beryllium-bronze of 0.2 and 0.3mm thickness；In work, together
The deformation direction of one compression chamber group septation is identical, and the deformation direction of two adjacent compression chamber group septations is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191940.6A CN109821103B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric stack driven injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191940.6A CN109821103B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric stack driven injection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109821103A true CN109821103A (en) | 2019-05-31 |
| CN109821103B CN109821103B (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910191940.6A Active CN109821103B (en) | 2019-03-01 | 2019-03-01 | Piezoelectric stack driven injection system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998017332A2 (en) * | 1996-10-25 | 1998-04-30 | D'antonio Consultants International, Inc. | Hypodermic fluid dispenser |
| CN202108708U (en) * | 2011-06-24 | 2012-01-11 | 浙江师范大学 | Piezoelectric stack pump with sensor |
| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
| CN102836478A (en) * | 2006-10-26 | 2012-12-26 | 马林克罗特有限公司 | Medical fluid injector having a thermo-mechanical driver |
| CN103671462A (en) * | 2013-12-19 | 2014-03-26 | 上海交通大学 | Piezoelectric valveless micropump suction cup based on parallel connection compliant mechanism |
| US20150308777A1 (en) * | 2014-04-25 | 2015-10-29 | David Panak | Feedback-controlled re-targeting apparatus for automatic firearm |
-
2019
- 2019-03-01 CN CN201910191940.6A patent/CN109821103B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998017332A2 (en) * | 1996-10-25 | 1998-04-30 | D'antonio Consultants International, Inc. | Hypodermic fluid dispenser |
| CN102836478A (en) * | 2006-10-26 | 2012-12-26 | 马林克罗特有限公司 | Medical fluid injector having a thermo-mechanical driver |
| CN202108708U (en) * | 2011-06-24 | 2012-01-11 | 浙江师范大学 | Piezoelectric stack pump with sensor |
| CN102678528A (en) * | 2012-05-23 | 2012-09-19 | 浙江师范大学 | Series-parallel hybrid-driven piezoelectric pump |
| CN103671462A (en) * | 2013-12-19 | 2014-03-26 | 上海交通大学 | Piezoelectric valveless micropump suction cup based on parallel connection compliant mechanism |
| US20150308777A1 (en) * | 2014-04-25 | 2015-10-29 | David Panak | Feedback-controlled re-targeting apparatus for automatic firearm |
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| Publication number | Publication date |
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| CN109821103B (en) | 2021-02-26 |
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