Zero waste dosing method and apparatus for filling containers of liquids
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65B-001/30
B67D-007/32
B67C-003/20
F04B-043/12
출원번호
US-0379611
(2013-02-25)
등록번호
US-9751748
(2017-09-05)
우선권정보
IT-MI2012A0281 (2012-02-24)
국제출원번호
PCT/IB2013/000275
(2013-02-25)
국제공개번호
WO2013/124728
(2013-08-29)
발명자
/ 주소
Trebbi, Claudio
Ragazzini, Ivan
출원인 / 주소
I.M.A Industria Macchine Automatiche S.P.A.
대리인 / 주소
Maine Cernota & Rardin
인용정보
피인용 횟수 :
0인용 특허 :
3
초록
Zero waste dosing method for filling containers of liquids which provides to use, at a delivery station of the liquid product, at least a volumetric pump with a rotor and stator, associated with a tank of the liquid to be introduced into said containers.
대표청구항▼
1. A zero waste dosing method to fill containers of liquids which provides to use, at a delivery station of the liquid product, at least a volumetric pump with a rotor and stator, associated with a tank of the liquid to be introduced into said containers, comprising a step of filling each container,
1. A zero waste dosing method to fill containers of liquids which provides to use, at a delivery station of the liquid product, at least a volumetric pump with a rotor and stator, associated with a tank of the liquid to be introduced into said containers, comprising a step of filling each container, defining a “zero” angular start-of-delivery position of the volumetric pump and an angular end-of-delivery position of the desired quantity of liquid as a function of the “zero” angular position, wherein the “zero” angular position and/or the angular end-of-delivery position of the desired quantity of liquid are controlled and regulated by control and command means configured to re-position the “zero” angular position and/or the angular end-of-delivery position, said method providing to control, by means of selective interception of the liquid delivered downstream of the outlet pipe of the volumetric pump, the desired delivery quantity of the liquid by defining an end-of-cycle delivery transitory through the angular end-of-delivery position. 2. The method as in claim 1, characterized in that after the end-of-cycle delivery transitory an angular delivery extra-travel is defined, determined by the rotation necessary to bring the rotor of the volumetric pump to the “zero” angular start-of-delivery position, in which, when the angular end-of-delivery position is reached by the rotor of the volumetric pump, the stream of liquid directed toward the container in said transitory and along said angular extra-travel is intercepted in order to divert it completely into the tank. 3. The method as in claim 1, characterized in that it provides to identify the position and the temporal instant in which the rotor of the volumetric pump, after having completed the angular travel of desired filling, arrives at the angular end-of-delivery position, and to completely recirculate in the tank the volume of liquid pumped in the angular travel from the angular end-of-delivery position to the “zero” angular start-of-delivery position. 4. The method as in claim 1 hereinbefore, characterized in that it provides to carry out individual measurements of the weight of each container, upstream and downstream of the filling step, in order to calculate a real or actual value of the volume of liquid delivered into the container and to carry out a differential comparison between a theoretical or expected value of the volume of liquid to be delivered into the container in a determinate work cycle and said real or actual value of the volume of liquid delivered into the container and to control, by varying or restoring the “zero” angular start-of-delivery position and/or the angular end-of-delivery position of the desired quantity of liquid, in closed-ring feedback in order to condition the functioning of the volumetric pump by means of a feedback signal which includes information relating to said differential comparison. 5. The method as in claim 1, characterized in that it provides to condition the selective interception of the liquid delivered downstream of the outlet pipe of the volumetric pump by means of said feedback signal. 6. The method as in claim 4, characterized in that it comprises a step in which the rotor of the volumetric pump reaches the “zero” angular start-of-delivery position, a step in which information and parameters on the type of liquid product to be dosed and/or on the product to be dosed are made available, a feedback calibration step on the volumetric pump, based on the information associated with the feedback signal and possibly of a statistical database, a fifth step of actuating a delivery condition of the product, a sixth step of calculating a possible new rotation value which must be carried out by the rotor of the volumetric pump on the basis of the feedback signal, a step of actuating the rotor of the volumetric pump for the dosage of the liquid product, until the angular end-of-delivery position is reached, a step of actuating, once the angular end-of-delivery position is reached, a condition of re-circulating the liquid product and a step which provides to move the rotor of the volumetric pump from the angular end-of-delivery position again to the “zero” angular start-of-delivery position. 7. A zero waste dosing apparatus to fill containers of liquids comprising at least a tank of liquid hydraulically coupled to at least one volumetric pump, characterized in that at least one of said volumetric pumps is configured to define a “zero” angular start-of-delivery position associated with a determinate angular position of a rotor of the at least one volumetric pump with respect to a pumping chamber of the liquid provided between rotor and stator and to define an angular end-of-delivery position of the desired quantity of liquid, a delivery extra-travel being provided, not connected with the introduction of the liquid into the containers, said apparatus being operatively associated with control, testing and command means which condition the “zero” angular position and/or the angular end-of-delivery position. 8. The apparatus as in claim 7, wherein said at least one volumetric pump is coupled upstream with a first inlet branch of the liquid, which connects the tank with the inlet of the volumetric pump, and connected downstream with a delivery member, suitable to introduce the desired quantity of liquid inside an associated container, characterized in that, downstream of said at least one volumetric pump a liquid interception mean is provided with selection of the passageways associated with the delivery member configured to receive the liquid from the first inlet branch, a second re-circulation branch, which leads into the tank, being associated with said liquid interception mean, said liquid interception mean being associated with the end of delivery of the desired quantity of liquid. 9. The apparatus as in claim 7, characterized in that said at least one volumetric pump is a peristaltic pump. 10. The apparatus as in claim 8, characterized in that it is associated with processing means configured to condition the liquid interception mean so that said liquid interception mean assumes at least a first delivery operating condition and a second re-circulation operating condition, wherein, in the first delivery operating condition the liquid interception mean allows the passage of the liquid exiting from the volumetric pump through the delivery member, in order to fill the container, and in the second re-circulation operating condition the stream of liquid coming from the volumetric pump is intercepted and diverted completely into the second re-circulation branch, from where it is directed again inside the tank. 11. The apparatus as in claim 10, characterized in that the liquid interception mean can be conditioned by means of a feedback signal deriving from a differential comparison between a theoretical or expected value of the volume of liquid to be delivered into the container in a determinate work cycle and a real or actual value of the volume of liquid delivered into the container. 12. The machine to fill, with precision, a plurality of containers using a liquid or mixture of liquids comprising a dosing apparatus according to claim 7. 13. The machine as in claim 12, characterized in that it comprises a first station to measure the tare of the containers, configured to operate upstream, at least in timing, of the step of filling the containers, and a second station, downstream of the dosing apparatus, to measure the gross weight of the containers after they have been filled, so as to determine, with a differential calculation with respect to the value of weight of the tare, the quantity of liquid actually delivered into the container, said machine also comprising processing means configured at least to command and control the dosing apparatus on the basis of both data pre-memorized in a suitable electronic database, as a function of the type of liquid to be delivered, and also on the basis of point-by-point information obtained from the first station and from the second station. 14. The machine as in claim 13, characterized in that the processing means are configured to condition the functioning of the volumetric pump using a feedback signal deriving from the differential comparison between a theoretical or expected value of the volume of liquid to be delivered into the container in a determinate work cycle obtained from the first station, and a real or actual value of the volume of liquid delivered into the container obtained from the second station wherein the processing means are configured to condition the functioning of the liquid interception mean by means of said signal.
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이 특허에 인용된 특허 (3)
Tadeusz Kemnitz, Apparatus and control method for accurate rotary peristaltic pump filling.
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