EP3954899A1 - Pumping system - Google Patents
Pumping system Download PDFInfo
- Publication number
- EP3954899A1 EP3954899A1 EP20464011.4A EP20464011A EP3954899A1 EP 3954899 A1 EP3954899 A1 EP 3954899A1 EP 20464011 A EP20464011 A EP 20464011A EP 3954899 A1 EP3954899 A1 EP 3954899A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- nitinol
- microcontroller
- contact
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 12
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910001000 nickel titanium Inorganic materials 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012781 shape memory material Substances 0.000 description 1
- 239000002520 smart material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
Definitions
- the invention relates to a pumping system made on the basis of elastic elements of Nitinol, intended for dosing constant amounts of liquid.
- the disadvantages of the described solution are that the placement of the spring of smart material along the length of the pipe leads to difficult control of the amount of liquid pumped, errors in determining the amount of liquid conveyed, high complexity of execution due to thermal insulation and changes in the elastic pipe properties because is subjected to temperature variations.
- the technical problem solved by the invention consists in the realization of a pumping system, controlled by a pair of nitinol springs, to which the pumped liquid quantity and the actuation time can be controlled.
- the pumping system according to the invention eliminates the disadvantages presented by the fact that it consists mainly of a cylindrical container, provided with a piston which is actuated by a system with two nitinol springs heated alternately by the Joule effect and through a timing circuit controls the movement of the piston through the cylindrical container, thus ensuring the pumping of a set amount of liquid.
- the pumping system according to the invention consists mainly of a cylindrical container 1, provided with a movable element (piston) 2 whose rod 3 ends with a T-shaped profile, provided at the lower end with a support 4 which fix two springs with nitinol 5 and 5 ', which have the other two ends fixed rigidly.
- the upper part of the rod profile 3 acts at the ends of the stroke the double microcontacts M 1 , M 1 ' and respectively M 2 , M 2 ', which control the closing and opening of the electrovalve 6 and the fans 7 and 7 'and disconnects the heating circuits of the nitinol springs 5 and 5' controlled alternately by the contacts of relays k 1 and k 2 via a microcontroller 8.
- the microcontroller 8 controls for a set time the closing of the relay contact k 2 (the contact M 2 in the heating circuit being normally closed), feeds the spring 5 (which is heated by the Joule effect and compresses when the switching temperature is reached), moving the piston 2 until in point B, when the microcontact M 2 is actuated, which controls the normally closed contact (thus interrupting the supply of the nitinol spring 5) and at the same time the normally open contact M 2 ' which simultaneously supplies the electrovalve 6 (which supplies the cylindrical container 1) and fan 7 that will cool the nitinol spring 5.
- relay k 2 Once the timing of relay k 2 expires, it will be controlled by the microncontroller 8 for a new period of time to actuate the contact of the relay k 1 , which supplies the nitinol spring 5' (which heats and compresses) making it possible to move the piston 2 to point A and pump the liquid outwards, and when the rod 3 reaches point A, the microcontact M 1 will be activated, opening the normally closed contact which interrupts the supply of the spring 5' and at the same time the normally open contact M 1 ' is actuated, starting the fan 7' which will help to cool the spring 5'.
- the set timing expires, the cycle is resumed, and depending on the timing set by the microcontroller 8, controlled amounts of fluid can be pumped or the pumped flow can be set.
- the pumping system according to the invention can be reproduced with the same characteristics and performances whenever necessary, which is an argument in favour of respecting the industrial applicability criterion.
Abstract
Description
- The invention relates to a pumping system made on the basis of elastic elements of Nitinol, intended for dosing constant amounts of liquid.
- In order to make devices for pumping fluids, a solution is known, (KIMURA S., Micropump. Patent application no.
JP33528492A - The disadvantages of the described solution are that the placement of the spring of smart material along the length of the pipe leads to difficult control of the amount of liquid pumped, errors in determining the amount of liquid conveyed, high complexity of execution due to thermal insulation and changes in the elastic pipe properties because is subjected to temperature variations.
- The technical problem solved by the invention consists in the realization of a pumping system, controlled by a pair of nitinol springs, to which the pumped liquid quantity and the actuation time can be controlled.
- The pumping system according to the invention eliminates the disadvantages presented by the fact that it consists mainly of a cylindrical container, provided with a piston which is actuated by a system with two nitinol springs heated alternately by the Joule effect and through a timing circuit controls the movement of the piston through the cylindrical container, thus ensuring the pumping of a set amount of liquid.
- The invention has the following advantages:
- constructive simplicity;
- elimination of pumped flow control errors;
- high operational safety and increased reliability;
- high fluid control accuracy.
- An embodiment of the invention is given below in connection with
Figure 1 which is an overview of the pumping system. - The pumping system according to the invention consists mainly of a
cylindrical container 1, provided with a movable element (piston) 2 whoserod 3 ends with a T-shaped profile, provided at the lower end with asupport 4 which fix two springs withnitinol 5 and 5 ', which have the other two ends fixed rigidly. The upper part of therod profile 3 acts at the ends of the stroke the double microcontacts M1, M1' and respectively M2, M2', which control the closing and opening of theelectrovalve 6 and thefans 7 and 7 'and disconnects the heating circuits of thenitinol springs 5 and 5' controlled alternately by the contacts of relays k1 and k2 via amicrocontroller 8. - The
microcontroller 8 controls for a set time the closing of the relay contact k2 (the contact M2 in the heating circuit being normally closed), feeds the spring 5 (which is heated by the Joule effect and compresses when the switching temperature is reached), moving the piston 2 until in point B, when the microcontact M2 is actuated, which controls the normally closed contact (thus interrupting the supply of the nitinol spring 5) and at the same time the normally open contact M2' which simultaneously supplies the electrovalve 6 (which supplies the cylindrical container 1) andfan 7 that will cool thenitinol spring 5. Once the timing of relay k2 expires, it will be controlled by themicroncontroller 8 for a new period of time to actuate the contact of the relay k1, which supplies the nitinol spring 5' (which heats and compresses) making it possible to move the piston 2 to point A and pump the liquid outwards, and when therod 3 reaches point A, the microcontact M1 will be activated, opening the normally closed contact which interrupts the supply of the spring 5' and at the same time the normally open contact M1' is actuated, starting the fan 7' which will help to cool the spring 5'. When the set timing expires, the cycle is resumed, and depending on the timing set by themicrocontroller 8, controlled amounts of fluid can be pumped or the pumped flow can be set. - The pumping system according to the invention can be reproduced with the same characteristics and performances whenever necessary, which is an argument in favour of respecting the industrial applicability criterion.
-
- [1]. KIMURA S., Micropump. Patent application no.
JP33528492A
Claims (2)
- Pumping system, characterized in that it consists mainly of one of a cylindrical container (1), provided with a piston (2) which is moved by means of a rod (3) ending in a shaped profile of T, provided at the lower end with a support (4) fixing two nitinol springs (5) and (5 '), which have the other two ends rigidly fixed, and the upper part of the rod profile (3) acts at the ends of the stroke of the doubles microcontacts (M1), (M1') respectively (M2), (M2'), which controls the closing and opening of the electrovalve (6), the fans (7) and (7') and disconnects the heating circuits of the nitinol springs (5) and (5 ') controlled alternately by the contacts of relays k1 and k2 via a microcontroller (8).
- Pumping system according to claim 1, characterized in that the microcontroller 8 controls for a set time the closing of the relay contact (k2) (the contact (M2) in the heating circuit being normally closed), the nitinol spring (5) is fed (which is heated by the Joule effect), moving the piston (2) to point B, at which point the microcontact (M2) is actuated, which controls the normally closed contact (thus interrupting the spring supply) and at the same time the normally open contact (M2') which simultaneously supplies the electrovalve (6) (which supplies liquid to the cylindrical container (1)) and the fan (7) which will cool the nitinol spring (5) and once its timing expires (k2) it will be controlled by the microcontroller (8), for a a new period of time, the actuation of the relay contact (k1), which supplies the nitinol spring (5') (which is heated and compressed) making it possible to move the piston (2) to point A and pump the liquid outwards, and when the rod (3) reaches point A the microcontact (M1) will be actuated, opening the normally closed contact which interrupts the supply of the spring (5') and at the same time the normally open contact (M1') is actuated and starts the fan (7') which will help at the spring cooling. When the set timing expires, the cycle is resumed, and depending on the timing set by the microcontroller (8), controlled flows and controlled quantities of fluid can be pumped.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RO202000503A RO135533A2 (en) | 2020-08-10 | 2020-08-10 | Pumping system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3954899A1 true EP3954899A1 (en) | 2022-02-16 |
EP3954899B1 EP3954899B1 (en) | 2023-11-22 |
Family
ID=72470309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20464011.4A Active EP3954899B1 (en) | 2020-08-10 | 2020-09-01 | Pumping system |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3954899B1 (en) |
RO (1) | RO135533A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024008451A1 (en) * | 2022-07-05 | 2024-01-11 | Shl Medical Ag | A sub-assembly of a pump device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06159250A (en) * | 1992-11-19 | 1994-06-07 | Tokin Corp | Micropump |
WO2004032994A2 (en) * | 2002-10-09 | 2004-04-22 | Therasense, Inc. | Fluid delivery device, system and method |
RO132827A2 (en) * | 2017-03-14 | 2018-09-28 | Universitatea "Ştefan Cel Mare" Din Suceava | Electromechanical vacuum and pressure micropump |
JP2020528492A (en) | 2017-07-27 | 2020-09-24 | ヴィーラント ウェルケ アクチーエン ゲゼルシャフトWieland−Werke Aktiengesellschaft | Copper alloy wire, nets and aquaculture cages |
-
2020
- 2020-08-10 RO RO202000503A patent/RO135533A2/en unknown
- 2020-09-01 EP EP20464011.4A patent/EP3954899B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06159250A (en) * | 1992-11-19 | 1994-06-07 | Tokin Corp | Micropump |
WO2004032994A2 (en) * | 2002-10-09 | 2004-04-22 | Therasense, Inc. | Fluid delivery device, system and method |
RO132827A2 (en) * | 2017-03-14 | 2018-09-28 | Universitatea "Ştefan Cel Mare" Din Suceava | Electromechanical vacuum and pressure micropump |
JP2020528492A (en) | 2017-07-27 | 2020-09-24 | ヴィーラント ウェルケ アクチーエン ゲゼルシャフトWieland−Werke Aktiengesellschaft | Copper alloy wire, nets and aquaculture cages |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024008451A1 (en) * | 2022-07-05 | 2024-01-11 | Shl Medical Ag | A sub-assembly of a pump device |
Also Published As
Publication number | Publication date |
---|---|
RO135533A2 (en) | 2022-02-28 |
EP3954899B1 (en) | 2023-11-22 |
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