WO1997037527A1 - Verfahren zum maschinellen milchentzug - Google Patents
Verfahren zum maschinellen milchentzug Download PDFInfo
- Publication number
- WO1997037527A1 WO1997037527A1 PCT/EP1997/001795 EP9701795W WO9737527A1 WO 1997037527 A1 WO1997037527 A1 WO 1997037527A1 EP 9701795 W EP9701795 W EP 9701795W WO 9737527 A1 WO9737527 A1 WO 9737527A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- teat
- kpa
- pressure
- milking
- pressure difference
- Prior art date
Links
- YXFVVABEGXRONW-UHFFFAOYSA-N Cc1ccccc1 Chemical compound Cc1ccccc1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J5/00—Milking machines or devices
- A01J5/007—Monitoring milking processes; Control or regulation of milking machines
Definitions
- the invention relates to a method for mechanical milk removal, in which an essentially constant milking vacuum is present below the teat during the milking of the milk, the milk being milked being let into the milk discharge line with the aid of a low, essentially constant NEN air flow is transported away and in a pulsator chamber formed between the teat rubber surrounding the teat and a milking cup, the pressure is controlled in such a way that a pressure difference with respect to the milking vacuum present below the teat is established during a teat relief phase.
- a so-called milking cup is attached to the teats for milking.
- the milking cup consists of an outer, rigid milking cup sleeve and an elastic tubular insert, the so-called teat rubber.
- the teat protrudes into the elastic tube part of the teat rubber during milking.
- a so-called pulsator chamber is formed between the outside of the hose part of the teat rubber and the inside of the teat cup sleeve, which is alternately placed under vacuum by a pulsator during milking in a so-called milking phase and under atmospheric pressure during a so-called teat relief phase.
- the lower end of the teat is connected via a short hose to a so-called collecting piece, into which the short lines of the usually four milking cups, which are attached to the respective teats, open.
- the collecting piece is connected to a milk discharge line via a so-called long milk hose.
- a so-called milking vacuum lies over the milk discharge line, the long milk hose, the collecting piece and the short hoses in each case below the teat.
- the removal of the milk is achieved by continuously introducing a small air stream under atmospheric pressure below the teat into the short hose or mostly into the collecting piece.
- the present invention was therefore based on the object of avoiding the occurrence of teat tip changes in the known milking systems described at the outset.
- this object was achieved according to the invention in that the pressure difference during the teat relief phase is selected in such a way that, taking into account one which is necessary for folding in the teatcup liner, depending on the type of teatcup liner used Pressure difference a pressure difference between 5 kPa and 35 kPa acts on the teat.
- the fold-in pressures of so-called stiff teat rubbers are between 12 kPa and 24 kPa, while the fold-in pressures of soft teat rubbers are between 5 kPa and 11 kPa.
- This respective folding pressure of the teat cup liner must therefore be taken into account if, assuming a constant milking vacuum under the teat tip, the maximum pressure in the pulsator chamber during the teat relief phase is set, which should lead to a pressure difference acting on the teat, which within the respective specified pressure range.
- FIG. 1 schematically shows a milking cup attached to a teat and connected to a so-called collecting piece
- FIG. 2 schematically shows a teat which is enclosed in the teat discharge cycle by the tubular part of a so-called rigid teat rubber
- FIG. 3 shows a representation similar to that in FIG. 2, the teat rubber consisting of a so-called soft rubber,
- FIG. 4 shows a diagram of the pressure curve in the pulsator chamber for a milking cluster according to the prior art and in comparison the curve curve of the pressure in the pulsator chamber according to the invention
- FIG 5 shows the pressure curve in the pulsator room according to the present invention, the maximum negative pressure in the pulsator room not coinciding with the milking vacuum.
- Fig. 1, 1 denotes a teat cup attached to a teat, which is connected via a short hose 2 to an inlet 3 of the schematically illustrated collecting piece 4.
- the remaining teat cups, not shown, of the remaining teats are connected to the inlets 5, 6 and 7, which is not shown in detail, and these inlets are connected to the inside of the collecting piece 4.
- the collector piece 4 is via an outlet 8 with the so-called long milk hose connected, which in turn is connected to the milk discharge line at which the nominal milking vacuum is present.
- a valve which is only shown schematically, is provided on the collecting piece 4, which allows a continuous low air flow under atmospheric pressure into the collecting piece 4 for the removal of the milk
- the milking cup 1 consists of an essentially cylindrical milking cup sleeve 10, which has at its lower end a narrowed opening 11, in which the lower end 1 2 of the teatcup liner 13 is clamped by means of a connecting piece 14.
- the connecting piece 14 is connected to the short milk tube 2.
- the teat rubber 13 consists of a head 14 with a central opening 15 into which the teat 16 is inserted.
- An annular pulsator chamber 20 is formed between the outside of the tubular part 18 of the teatcup liner and the inner wall of the teat cup sleeve 10.
- the latter is connected via a line 21 to a pulsator (not shown in more detail) which cyclically controls the pulsator chamber 20 between two pressure limit values.
- 1 shows the milking cup in the state in which the milking cycle is in the sucking phase. In this state, the pressure in the pulsator chamber 20 is reduced in relation to the milking vacuum applied below the teat in such a way that the tubular part of the teat rubber is in its tubular, ie not collapsed, state.
- FIGS. 2 and 3 each show teat tips 29 and 39, and the tubular part of the teat rubber 28 and 38 is shown schematically in the collapsed, ie folded, state.
- the pressure in the pulsator room is higher than that below the teat effective milking vacuum so that the tubular part of the teat rubber loses its tubular shape and collapses in the form of a squeezed tube.
- FIGS. 2 and 3 The difference between FIGS. 2 and 3 is that a so-called rigid rubber was used in FIG. 2, while the behavior of a so-called soft rubber is shown in FIG. 3.
- the opposite sides 26 and 27 of the teatcup liner touch approximately at point 25, which lies at a relatively large distance below the teat tip 29.
- the sides 26 and 27 form a pointed triangle starting from the tip 25 and the two legs of this triangle practically wedge-like press on the opposite sides of the teat tip 29 approximately in the form of rigid legs.
- the tubular teat rubber is squeezed in the collapsed state in such a way that the opposite sides 36 and 37 lie against one another over a substantially longer distance.
- the soft teat rubber practically fits snugly against the lower tip of the teat over a larger area. In this way, a uniform pressure is exerted on the surface of the lower teat from the end of the teat channel.
- FIGS. 2 and 3 show why, when soft teat rubbers are used, even higher pressures in the teat discharge cycle do not cause as serious udder damage as stiffer teat rubbers.
- the collapsing tubular part 28 of the teat rubber acts practically like a pair of pliers with a pivot point at point 25, which presses with its legs 26 and 27 on two opposite sides of the teat, which inevitably leads to squeezing and turning inside out at higher pressures of the lower end of the streak canal.
- FIG. 3 a soft teat rubber supports around the entire lower end of the teat in the teat discharge cycle, so that even higher pressures than with a stiff teat rubber can be exerted on the teat without this leads to permanent damage.
- the solid curve 40 shows the time course of the pressure in the pulsator chamber 20, as is common in the milking systems described above.
- the milking vacuum below the teat is 50 kPa in this example.
- This relatively constant milking vacuum is shown by the dashed line 41.
- the phases of the cycle namely suction cycle "S" and discharge cycle "E", are shown on the time axis.
- suction cycle During the suction cycle, the negative pressure rises from practically atmospheric pressure or the negative pressure zero to the negative pressure 50 kPa and remains at this value for a longer period of time before it drops again to the negative pressure zero at the end of the suction cycle.
- the same pressure acts on the inside as on the outside of the tubular part of the teat rubber, so that this part of the teat rubber assumes its tubular shape. whereby the sucked-off milk can flow freely.
- the negative pressure in the pulsator chamber is at zero, ie there is atmospheric pressure in the pulsator chamber.
- the pressure difference between the milking vacuum below the teat and the interior of the pulsator room is greatest, ie it is 50 kPa in the present exemplary embodiment.
- the fold-in pressure of the teat rubber used which is between about 5 to 11 kPa for soft rubbers and between 12 and 24 kPa for rigid rubbers, a pressure of 38 to 45 kPa results for soft rubbers and for rigid ones Rubbers from 26 to 38 kPa.
- These pressures on the teat are too high. This applies in particular to the new cattle breeding.
- the breeding was aimed at cows with high milk yield and high milk flow during milking. This has resulted in cows with relatively short teats which, in contrast to the earlier, relatively meaty teat ends, now have relatively thin teat ends, which are without any padding, so to speak. These very thin teat tips are obviously particularly at risk with regard to excessive pressure loads.
- a teat rubber with a folding pressure of 12 kPa has now been chosen for a milking system of the type described in the introduction.
- This fold-in pressure corresponds to a teatcup liner which lies at the lower edge of the area of the stiff teatcup liners, if one calls such teatcup liners as stiff teatcup liners whose fold-in pressures lie in a range between 12 kPa and about 24 kPa to consider such teat rubbers as soft teat rubbers, the folding pressure of which lies in the range between 5 kPa and 11 kPa.
- the solid curve 50 shows the course of the pressure in the pulsator chamber as a function of time.
- a teat rubber was used that can be described as extremely soft and only had a folding pressure of 5 kPa.
- a milking vacuum below the teat of approximately 40 kPa was used in this embodiment, which could be regarded as essentially constant.
- the milking vacuum is shown in Fig. 5 as a dashed line at a constant level.
- a higher negative pressure of 50 kPa in relation to the milking vacuum of 40 kPa was used in the pulsator room during the suction phase "S". During the maximum of the suction phase, this led to an outward pull on the tubular part of the teat rubber, which tried to inflate it further.
- the vacuum in the pulsator chamber was only reduced to a negative pressure of 10 kPa (see line 52 of the pressure curve). This resulted in a pressure difference of 30 kPa between the pulsator chamber and the milking vacuum below the teat in the relief phase. If one takes into account that a pressure of 5 kPa was necessary to bring the teat rubber into the collapsed state, a pressure difference of 25 kPa remained, which acted as pressure on the teat in the relief phase.
- the maximum permissible pressure differences when using teat rubbers with a folding pressure between 12 and 24 kPa are 20 to 10 kPa, but preferably 15 to 5 kPa. If teat rubbers with a fold-in pressure between 5 and 11 kPa are used, the maximum pressure difference when using a milking vacuum of 35 kPa is 25 to 20 kPa, but preferably 20 to 15 kPa.
- the maximum permissible pressure difference depending on the milking vacuum is between 5 and 20 kPa when using a teat rubber with a folding pressure of 24 kPa, and when using a teat rubber with a folding pressure of 11 kPa 20 and 30 kPa and preferably between 15 and 30 kPa, and when using a teat rubber with a folding pressure of 5 kPa between a maximum pressure difference of 25 and 35 kPa and preferably 20 and 35 kPa.
- the lower values of a range are each assigned to the low milking vacuum of 35 kPa and the upper values of the range to a milking vacuum of 50 kPa, while the values in between are to be assigned according to the milking vacuums between 35 and 50 kPa.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- External Artificial Organs (AREA)
- Polarising Elements (AREA)
- Paper (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Dairy Products (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97920649A EP0898447B1 (de) | 1996-04-11 | 1997-04-10 | Verfahren zum maschinellen milchentzug |
DE59704373T DE59704373D1 (de) | 1996-04-11 | 1997-04-10 | Verfahren zum maschinellen milchentzug |
AT97920649T ATE204425T1 (de) | 1996-04-11 | 1997-04-10 | Verfahren zum maschinellen milchentzug |
CA002251568A CA2251568C (en) | 1996-04-11 | 1997-04-10 | Mechanical milking process |
AU26955/97A AU2695597A (en) | 1996-04-11 | 1997-04-10 | Mechanical milking process |
US09/171,226 US6145471A (en) | 1996-04-11 | 1997-04-10 | Method of mechanically extracting milk |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19614377.2 | 1996-04-11 | ||
DE19614377A DE19614377A1 (de) | 1996-04-11 | 1996-04-11 | Verfahren zum maschinellen Milchentzug |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997037527A1 true WO1997037527A1 (de) | 1997-10-16 |
Family
ID=7791021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1997/001795 WO1997037527A1 (de) | 1996-04-11 | 1997-04-10 | Verfahren zum maschinellen milchentzug |
Country Status (7)
Country | Link |
---|---|
US (1) | US6145471A (de) |
EP (1) | EP0898447B1 (de) |
AT (1) | ATE204425T1 (de) |
AU (1) | AU2695597A (de) |
CA (1) | CA2251568C (de) |
DE (2) | DE19614377A1 (de) |
WO (1) | WO1997037527A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2217746T3 (es) * | 1998-03-23 | 2004-11-01 | Silclear Limited | Funda de pezonera. |
DE10046276A1 (de) * | 2000-09-19 | 2002-04-18 | Westfalia Landtechnik Gmbh | Verfahren und Vorrichtung zum verbesserten Ausmelken eines Tieres, insbesondere einer Kuh |
DE102007019191B4 (de) * | 2006-07-10 | 2016-09-22 | Gea Westfaliasurge Gmbh | Zitzengummi mit stoßabsorbierenden Eigenschaften |
US20090007847A1 (en) * | 2007-07-07 | 2009-01-08 | Arkadi Relin | Method of dynamic milking |
CH701646B1 (de) * | 2007-10-05 | 2011-02-28 | Alfred Kummer | Pulsatorvorrichtung. |
DE102012005649A1 (de) | 2012-03-22 | 2013-09-26 | Gea Farm Technologies Gmbh | Verfahren zum Betreiben einer Melkanlage |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989008384A1 (en) * | 1988-03-11 | 1989-09-21 | Alfa-Laval Agriculture International Ab | A milking machine and a method of milking by means of the same |
WO1992022197A1 (en) * | 1991-06-13 | 1992-12-23 | Dec International, Inc. | Milking system with positive pressure on thin liner |
EP0522497A1 (de) * | 1991-07-10 | 1993-01-13 | Fritz Happel | Abschluss für eine Milchleitung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2844562C2 (de) * | 1978-10-12 | 1983-01-05 | Bio-Melktechnik Swiss Hoefelmayr & Co, 9052 Niederteufen, Aargau | Verfahren zum selbsttätigen Ausmelken beim maschinellen Milchentzug |
US4572104A (en) * | 1983-12-01 | 1986-02-25 | Babson Bros. Co. | Method of milking |
DE3621666A1 (de) * | 1986-06-27 | 1988-01-14 | Westfalia Separator Ag | Verfahren zum maschinellen milchentzug |
DE3624478A1 (de) * | 1986-07-19 | 1988-01-28 | Westfalia Separator Ag | Melkbecher fuer melkanlagen |
SE9100242D0 (sv) * | 1991-01-25 | 1991-01-25 | Alfa Laval Agri Int | Saett att mjoelka |
US5419280A (en) * | 1992-03-27 | 1995-05-30 | Milking Automation Technology Co., Ltd. | Milking machine |
IT1270881B (it) * | 1993-10-01 | 1997-05-13 | S El Pro Di Visigalli Ercolino | Mungitrice automatica |
SE9401685D0 (sv) * | 1994-05-17 | 1994-05-17 | Tetra Laval Holdings & Finance | Metod för mjölkning av djur |
SE504427C2 (sv) * | 1995-05-17 | 1997-02-10 | Tetra Laval Holdings & Finance | Sätt och anordning att mjölka ett djur genom bestämning av pulseringsvakuumets nivå när spengummit öppnar eller stänger abrupt |
SE511014C2 (sv) * | 1995-12-22 | 1999-07-19 | Alfa Laval Agri Ab | Sätt att mjölka ett djur med hjälp av två olika tryck och mjölkningsmaskin med två tryckkällor |
-
1996
- 1996-04-11 DE DE19614377A patent/DE19614377A1/de not_active Withdrawn
-
1997
- 1997-04-10 WO PCT/EP1997/001795 patent/WO1997037527A1/de active IP Right Grant
- 1997-04-10 CA CA002251568A patent/CA2251568C/en not_active Expired - Fee Related
- 1997-04-10 AU AU26955/97A patent/AU2695597A/en not_active Abandoned
- 1997-04-10 EP EP97920649A patent/EP0898447B1/de not_active Expired - Lifetime
- 1997-04-10 DE DE59704373T patent/DE59704373D1/de not_active Expired - Lifetime
- 1997-04-10 US US09/171,226 patent/US6145471A/en not_active Expired - Fee Related
- 1997-04-10 AT AT97920649T patent/ATE204425T1/de not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989008384A1 (en) * | 1988-03-11 | 1989-09-21 | Alfa-Laval Agriculture International Ab | A milking machine and a method of milking by means of the same |
WO1992022197A1 (en) * | 1991-06-13 | 1992-12-23 | Dec International, Inc. | Milking system with positive pressure on thin liner |
EP0522497A1 (de) * | 1991-07-10 | 1993-01-13 | Fritz Happel | Abschluss für eine Milchleitung |
Also Published As
Publication number | Publication date |
---|---|
US6145471A (en) | 2000-11-14 |
EP0898447B1 (de) | 2001-08-22 |
ATE204425T1 (de) | 2001-09-15 |
EP0898447A1 (de) | 1999-03-03 |
CA2251568A1 (en) | 1997-10-16 |
AU2695597A (en) | 1997-10-29 |
DE19614377A1 (de) | 1997-10-16 |
DE59704373D1 (de) | 2001-09-27 |
CA2251568C (en) | 2002-11-12 |
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