MANAGING METHOD

• US 20110200458A1
• Filed: 10/09/2009
• Published: 08/18/2011
• Est. Priority Date: 10/09/2008
• Status: Abandoned Application

• Current Assignee: Ragazzini Srl
• Original Assignee: Ragazzini Srl
• Inventors: Vespignani, Gianluca, Baruzzi, Roberto
• Application Number:
  US13/123,243
• Publication Number:
  US 20110200458A1
• Time in Patent Office: Days
• US Class Current: 417/53
• CPC Class Codes: F04B 2201/1201 Rotational speed of the axis
• CPC Class Codes: F04B 2201/1208 Angular position of the shaft
• CPC Class Codes: F04B 2205/09 Flow through the pump
• CPC Class Codes: F04B 43/0081 systems, control, safety measures
• CPC Class Codes: F04B 43/1253 by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing

Abstract

A method for managing a pumping device (10) suitable, in use, to supply in a periodic pulsed manner a plurality of given quantities (Q) of a given fluid (M) so as to generate a flow of said given fluid (M) presenting a first given average flow rate (PM1); the supply of each given quantity (Q) being both preceded and followed by respective first pauses (P1) in the supply of the given fluid (M) presenting a first given duration (T1); the method in question comprising at least a phase of stopping the pumping device (10) so as to introduce at least a given second pause during the supply of at least a quantity (Q) of the given fluid (M).

Claims

1. A method for managing a pumping device (10) of the peristaltic rotary type provided with a rotor (18) and suitable, in use, when said rotor (18) rotates with a constant angular speed (V), to supply in a periodic pulsed manner a plurality of given quantities (Q) of a given fluid (M) in such a way so as to generate a flow of said given fluid (M) presenting a first given average flow rate (PM1);

the supply of each said given quantity (Q) being both preceded and followed by respective first pauses (P1) in the supply of said given fluid (M) presenting a first given duration (T1);

said managing method comprising at least a phase of stopping said pumping device (10) so as to introduce at least a given second pause (P3) during the supply of at least a said quantity (Q) of said given fluid (M);

each said phase of stopping said pumping device (10) comprising a phase of synchronising each said given second pause (P3) relative to at least a corresponding said first pause (P1) in the supply of said given fluid (M);

said phase of synchronising each said second pause (P3) being performable in an automatic manner through control means (20) for controlling said pumping device (10);

characterised in that each said phase of stopping said pumping device (10) is both preceded and followed by a phase of supplying a given fraction (Q″

) of said quantity (Q) of said given fluid (M);

each said phase of supplying a given fraction (Q″

) presenting a given second duration (TQ″

).

2. A method according to claim 1, characterised by comprising a phase of selecting a given number (N) of said second pauses (P3) interposed between each two consecutive said first pauses (P1) and suitable to fractionate the supply of each said quantity (Q) of fluid (M);

each said second pause (P3) being associated with a respective phase of stopping said pumping device (10) and presenting a given third duration (T3) in such a way so that the flow of said given fluid (M) supplied by said pumping device (10) presents at least a second average flow rate (PM2) lower than said first average flow rate (PM1) and definable substantially at will.

3. A method according to claim 2, characterised in that each supply of a said quantity (Q) of said given fluid (M) is carried out through a number of said phases of supplying a said given fraction (Q″

) equal to said given number (N) increased by one unit.

4. A method according to claim 2, characterised in that said given number (N) can be chosen, in use, among a plurality of preset whole values so as to maximise the uniformity over time of the flow rate of the flow of fluid (M) supplied by said pumping device (10).

5. A method according to claim 2, characterised in that said phase of selecting a given number (N) comprises a phase of calculating said selected number (N) by means of a numerical algorithm suitable to maximise the uniformity over time of the flow rate of the flow of said given fluid (M) supplied by said pumping device (10).

6. A method according to claim 5, characterised in that said numerical algorithm is implemented by means of a numerical procedure of minimisation of the sum of the square number of the difference between said third duration (T3) and said first duration (T1), with the square number of the difference between said second duration (TQ″

) and said first duration (T1).

7. A method according to claims 2, characterised in that said phase of selecting a given number (N) is followed by a phase of calculating said third duration (T3) of each said second pause (P3) and said second duration (TQ″

) of each said phase of supplying a said fraction (Q″

) of said quantity (Q) in such a way so that the flow of said given fluid (M) supplied by said pumping device (10) presents said second average flow rate (PM2).

8. A method according to claim 1, characterised in that said phase of synchronising each said second pause (P3) comprises, following each said first pause (P1), the performance in sequence of a phase of actuating said pumping device (10) for a time interval presenting said second duration (TQ″

);

a cyclical repetition for a said given number (N) of times of a phase of stopping said pumping device (10) for a time interval presenting said third duration (T3) and of a phase of actuating said pumping device (10) for a time interval presenting said second duration (TQ″

); and

a phase of actuating said pumping device (10) for a time interval presenting said first duration (T1).

9. A method according to claim 1, characterised in that said phase of synchronising each said second pause (P3) comprises, following each said first pause (P1), the performance in sequence of a phase of stopping said pumping device (10) for a time interval presenting a fourth duration (T4) substantially equal to the difference between said third duration (T3) and said first duration (T1);

a phase of actuating said pumping device (10) for a time interval presenting said second duration (TQ″

);

a cyclical repetition for a said given number (N) of times of a phase of stopping said pumping device (10) for a time interval presenting said third duration (T3) and of a phase of actuating said pumping device (10) for a time interval presenting said second duration (TQ″

); and

a phase of actuating said pumping device (10) for a time interval presenting said first duration (T1).

10. A method according to claim 1, characterised by being suitable to simulate the supply of a flow of said given fluid (M) by a pumping device (10) provided with a rotary peristaltic pump (15) equipped with a number of respective pressing rollers (19) equal to said given number (N) increased by one unit.

11. A method according to claim 1, characterised in that each phase of actuating said pumping device (10) consists of a phase of actuating said rotor (18) into rotation at a given constant angular speed (V).

12. A method according to claim 1, characterised by comprising an initial phase of selecting an operative mode of said pumping device (10) among at least a first operative mode (B), in which said pumping system (10) is suitable to supply said given fluid (M) in a plurality of doses (Q′

) substantially identical to each other and definable substantially at will, and a second operative mode (C), in which said pumping system (10) is suitable to supply continuously a flow (F) of said fluid (M) presenting a flow rate definable substantially at will and substantially uniform over time.

13. A method according to claim 12, characterised in that said phase of selecting the operative mode of said pumping device (10) is followed by a phase of assigning a value definable substantially at will to said second average flow rate (PM2) of the flow of said given fluid (M) to be supplied through said pumping device (10);

said second average flow rate (PM2) being lower than said first average flow rate (PM1).