DE202006020484U1 - liner - Google Patents

Abstract

liner for milking cups, with a teat rubber head (4), the one Insertion opening (12) for a teat (14) has, and with an adjoining the teat rubber head (4) Hose part (2), the at least partially a teat receiving space (18) and an underlying inner space (20) limited above at least one channel (22) is connectable to the atmosphere, characterized in that the channel is dimensioned in such a way that of the atmosphere to the channel (22) guided Air flow is at least the same size as that through the channel (22) to the interior (20) metered air flow.

Description

The The invention relates to a teatcup liner for a milking parlor according to Preamble of claim 1.

Such a teatcup liner is clamped onto a teat cup of a milking cluster and forms with it an annular space to which, depending on the milking process, overpressure, atmospheric pressure or negative pressure can be applied. The milking cup with the teatcup liner is pushed over the teat so that it dips into a teat receiving space encompassed by the teatcup liner in which the milking vacuum acts at least in sections. Depending on the milking method, the teatcup liner is subjected to a differential pressure between the teat receiving space and the annular space during a discharge or massage cycle, whereby the annular space is usually connected to the atmosphere. In an improved milking method according to the EP 1 219 166 A2 During the massage cycle, the milking vacuum in the teat-receiving space is already reduced without milk flow, so that the re-massage of the blood from the teat tip to the teat base is improved and thus a gentle milking process with considerably reduced mastitis susceptibility is made possible.

at In unfavorable conditions of use, it may happen that it opposed to a milk flow through the Vacuum given milk flow direction comes, so that the milk squirts against the teat and thus the teat opening is washed around. This is particularly unfavorable because it causes pathogens in the Teat can enter and thus a significant risk of infection which also includes the other quarters of the udder or even at A change of the milking machine other animals can be infected.

To avoid such a backflow, for example, with the publications EP 1 219 166 . DE OS 25 51 931 . DE OS 25 04 605 or DE 100 56 224 A1 proposed to connect the interior of the teatcup liner located below the teat receiving space with the atmosphere via a channel in the teat rubber wall. Through this intended leak, it is achieved that during milk flow, the liquid column is detached below the teat, so that the above-described return flows are reliably prevented. Furthermore, a discharge of the interior from the vacuum in a milking process in which the vacuum connection to the interior is closed or throttled in the massage cycle takes place via such a channel in the massage cycle.

jet or grooves or ribs in the headspace of a teatcup liner are thus known for a long time. Also longitudinal grooves / ribs in the hose part a teatcup liner are known for airflow to below the Teat to help drain the milk. These measures have proven to be inadequate in practice. Only a groove or nozzle in the headspace does not bring the desired Effect of air access below the teat to detach the milk jet. Even longitudinal channels along the teat were unsatisfactory, because the dosage only by nozzle or groove / rib took place in the headspace. In this arrangement came too much vacuum in the annular space of the headspace, so that on the one hand the milking cluster the teat rises up towards the udder or through the teat in the teat cup head region The vacuum is applied so that it comes to redness. Too little air intake dosing in the head was insufficient Air access below the teat, not the desired Outflow of milk ensured by the teat.

In contrast, the invention has for its object to provide a teatcup through the milking process can be improved.

These The object is achieved by a teat rubber having the features of the claim 1 solved.

Has according to the invention the teatcup liner preferably has a teatcup liner head having an insertion opening for a teat and to which a tube part adjoins, the at least partially a teat receiving space and a limited space underneath. This interior is over a channel connected to the atmosphere, leaving a flow of air in the enclosed by the hose part interior below a teat can flow. According to the invention Channel dimensioned such that of the atmosphere to the channel guided air flow equal or is greater than the air flow passing through the channel passes through to the interior. This ensures that that in teat rubber head no excessive Form vacuum, so that the disadvantages described above (upgrade of the milking cluster, redness of the teats in the headspace) with minimal Expenses are eliminated.

According to the Invention, the decisive dosage of air access occurs through the cross section of the canal along the teat. To the disadvantages preventing an occurrence of vacuum in the headspace, it is important that the entrance of atmosphere to the upper beginning of the channel or in the headspace in a construction of a teatcup liner with headspace, is equal or greater, so that is achieved at Conventional milking the detachment of the milk jet done quickly by the teat. In a milking with Supply air arrangement in which the vacuum is throttled below the teat or is completed, additionally by the supply air one Lowering the vacuum on the teat in the massage cycle.

at Teatcup liners with a headspace may have this via a vent with the atmosphere and across the channel with the Be connected to the interior, in which case the air flow through the ventilation to the headspace bigger or the same size as the outflowing from the headspace air flow through the channel to Interior is.

The Supply of ventilation to the headspace is preferably via a recess in the circumference of the insertion opening or by means of a nozzle in the wall of the headspace. The nozzle is arranged so that it is cleaned is rinsed.

at a preferred solution is the channel through one or formed several grooves in the teat rubber wall. alternative could the channel between radially projecting webs be formed on the inner peripheral wall of the teatcup liner.

In a preferred embodiment, the design of the gutter be dimensioned on the hose part so that when milking a defined Air flow past the teat into the interior. The air flow through the channel to the interior of the teatcup liner should a vent through a nozzle with a diameter from about 0.5 to 0.7 mm, or about 2 to 6 l / min at 40 kPa.

at In a preferred embodiment, the channel is such trained that he in the massage cycle with collapsed teat rubber formed in the region with a larger cross section is.

The Width of the channel is preferably when using a channel in the range between 0.3 mm and 1.5 mm, in one embodiment this width is about 0.7 mm.

at a variant of the teatcup liner is designed so that the channel when collapsing during the massage stroke in cross section seen to the teat receiving space makes an opening movement. This opening movement facilitates in particular when machine Clean the accessibility to the duct walls.

at In another embodiment, the course of the channel is arcuate designed so that the radius of the hose part in the area of the ventilation channel also during the deformation of the hose part by the massage remains approximately the same as in the open state. This keeps the gutter width even during the massage almost unchanged.

at preferred embodiments of the invention can the bottom of the channel and / or pointing to the teat receiving space Longitudinal edges be rounded.

at Another variant of the invention is the ventilation to the atmosphere only in the invaginated state the insertion opening, d. H. when put on a teat Teat rubber effective.

To can the ventilation through a recess on the outer wall be formed of teat rubber head, which only in the invaginated State has a connection to the headspace and thus only when Placing the teatcup liner on the teat opens.

Around ensure that in the invaginated state a connection to the atmosphere, the recess should be relatively far into the atmosphere-side part of the teat insertion opening extending outer wall of the teatcup liner.

at a particularly effective teatcup liner is this on the hose part formed with at least one thin wall region, preferably in the massage cycle allows a conclusion to the vacuum.

other advantageous developments of the invention are the subject of further Dependent claims.

in the Below is an embodiment of the invention based schematic drawings explained in more detail. It demonstrate:

1 a longitudinal section through a teatcup liner according to the invention;

2 a detailed view of a head portion of the teatcup liner 1 in the invaginated state;

3 a cut through the teat rubber 1 and

4 a partial view of another section according to 3 ,

In 1 is a longitudinal section through a teatcup liner 1 a milking machine shown, which is clamped in a milking cup, not shown. With regard to the basic structure of such a cluster is on the above-described prior art and the WO 00/13489 A2 the applicant referenced. In such a so-called two-room milking cup, the milking vacuum is applied in the suction stroke to the teat so that milk can flow away from the teat, through the teat rubber and through a milk hose to a collecting piece. In the massage cycle is by the admission of atmosphere or overpressure in the aforementioned Annular space between the outer circumference of the teatcup liner 1 and an inner peripheral wall of the milking cup, the teatcup liner is collapsed so that the blood is massaged back from the teat tip to the teat base. Further details of the aforementioned WO-font be removed.

This in 1 illustrated embodiment of the teatcup liner 1 has a hose part 2 that with his in 1 overhead end portion in a teatcup liner head 4 passes. This one has a head sleeve 6 extending at a distance from this end portion of the hose part 2 from the teat rubber head 4 way down (view after 1 ), so that an annulus 8th is formed, in which the upper end portion of the milking cup, not shown, is inserted. The lower end of this milking cup sits on a tensioning bead 10 on, projecting in the radial direction at the lower end portion of the hose part 2 is formed, so that the teatcup liner 1 is clamped in the teat cup. On teat rubber head 4 is an insertion opening 12 formed, in the dotted lines indicated by dashed lines 14 when inserting the milking machine dips. The opposite the hose part 2 radially extended teat rubber head 4 forms a headspace 16 who is the teat 14 encircles annularly.

The hose part 2 can be with inserted teat 14 in a the teat 14 embracing teat receiving space 18 and an interior below 20 divide. The latter is over a gutter 22 with the headspace 16 connected. In the illustrated embodiment, the gutter 22 by a preferably parallel to the longitudinal axis 24 extending channel in the teat rubber wall 26 formed and extends into the from the hose part 2 widening headspace 16 into it.

According to 2 holding the teat rubber head 4 at the teat 14 attached teatcup liner 1 shows, which are the insertion opening 12 encompassing wall sections of the teat rubber head 4 Inwardly arched, as the diameter of the insertion 12 is chosen so that a concern on the outer peripheral surface of the teat 14 is guaranteed even with different teat sizes. As shown in the illustration 2 is removable, in this vaulted state of the headspace 16 over aeration 28 connected to the atmosphere. This ventilation 28 is by an approximately radial with respect to the teat 14 or to the longitudinal axis 24 extending channel-like recess formed approximately at the front of the teatcup liner 4 from the insertion opening 12 away to near the outer diameter D of the teatcup liner head 4 extends. This ensures that the ventilation 28 is open to the atmosphere even with very strong arching or concerns about the udder.

A special feature of the illustrated embodiment is that in the non-vaulted state (view 1 ) the ventilation 28 to the headspace 16 is locked off because the in 1 bottom corner area 30 the insertion opening 12 then sealing to the outer circumference of the teat 14 is applied. This may for example be the case when the teatcup liner 1 undesirably from the teat 14 slip. By sealing the headspace 16 then creates a vacuum in the atmosphere so that further slipping is prevented.

In this embodiment, the ventilation opens 28 thus only in the arched state of the teat rubber head 4 the connection to the atmosphere. If this vaulting condition is not achieved or occurs during the milking process, this atmosphere connection is shut off.

The length of the gutter 22 is designed so that even with different teat geometries 14 always a connection from the headspace 16 to the interior 20 guaranteed.

3 shows a sectional view through the hose part 2 during the massage cycle, in which the tube part 2 collapses and, for example, by one in the area of the interior 20 trained thin-wall portion and a co-operating edge acting together, which can be integrated into the teatcup liner or executed on a separate component, a connection to the milking vacuum shut off or at least strongly throttled. This in 3 shown folding the hose part 2 is by applying the outer circumference of the hose part 2 caused by atmospheric pressure or an overpressure, wherein the hose part 2 then deformed elliptically. According to 3 is the gutter 22 preferably in that region of the teat rubber wall 26 arranged, which forms the broad side of the ellipse in a collapsed state. This ensures that the opening of the gutter 22 when folding into a teat 14 towards increased and thus the advantageous connection to the atmosphere remains or is not hindered. When arranging the gutter 22 on the narrow side of the teat rubber wall 26 would be the opening of the gutter 22 to the teat 14 down when folding in a disadvantageous manner. In the embodiment according to 3 has the gutter 22 about a rectangular shape.

According to the in 4 illustrated embodiment, only the area marked with a circle in 3 shows, this channel can be used to optimize the flow conditions and to protect the teat 14 with a rounded bottom 32 and rounded longitudinal edges 34 be executed, wherein the longitudinal edges 34 a gentle one Ensure plant and the rounded bottom 32 on the one hand offers optimal flow conditions and on the other hand is easy to clean and prevents deposits.

The geometry of the gutter 22 is preferably designed so that in a machine cleaning and a folding of the tube part produced therefor 2 (without teat) the opening of the channel is increased inwards, so that the cleaning process is supported in the best possible way.

The effective flow cross sections of the ventilation 28 and the gutter 22 are coordinated so that the air flow from the atmosphere through the ventilation 28 in the headspace 16 at least during the suction stroke is equal to or greater than the air flow from the headspace 16 through the gutter 22 through to the interior 30 of the hose part 2 , In this way it is ensured that during normal operation (stuck milking, teat head rubber 4 vaulted) in the headspace 16 no vacuum can occur and thus the tearing off of the milk column in the interior 20 during the massage.

These flow conditions can be relatively easily by appropriate tuning of the flow cross sections in the ventilation 28 and the gutter 22 to adjust.

The construction according to the invention can be used with all teat rubber variants. In principle, the teat liner could also without the radially enlarged teat cup head 4 with headspace 16 be formed - it would then be ensured that the from the atmosphere to the gutter 22 flowing airflow meets the above condition, ie this airflow must be at least as large as the flow through the channel 22 in the interior 20 be.

The width B of the gutter 22 in the contact area with the teat 14 is preferably in the range between 0.3 mm and 1.5 mm. In a specific embodiment, this width B is about 0.7 mm.

According to a further embodiment, the cross section of the channel during the massage cycle should not or only insignificantly change. The problem with this is that in the massage cycle the tube part is deformed oval, wherein the tube part is stabilized in the region of the teat by this, so that the ovality is comparatively low. This ovality then increases strongly toward the end of the teat. In order to ensure that the cross section of the channel remains the same in this area with greater ovality, in one variant of the invention, the channel can be guided so that it runs in folded teat rubber in a region in which the teat rubber wall has a predetermined, approximately constant radius of curvature having. This radius of curvature may be for example 14 mm. D. h., The channel runs in a side view of the teat rubber seen arcuately, wherein it is approximately parallel to the longitudinal axis in the upper region of the tube and then extends to the end of the teat and in the area encompassing the interior obliquely to the longitudinal axis, said Tilting is determined by the ovality of the teatcup liner. In other words, if you put a section through the teatcup in the area of the teat end, so would the gutter 22 not - as in 3 not in the symmetry axis but more offset to one of the narrow sides of the hose part.

The gutter 22 is dimensioned such that the air flow passing through it corresponds to aeration via a nozzle of about 0.5 to 0.7 mm diameter or a volume flow of about 2.0 to 6.0 l / min at 40 kPa vacuum.

Disclosed is a teatcup liner for teat cups, with a teatcup liner, the one insertion opening for a teat Has. At the teat rubber head, a hose part closes on, at least in sections, a teat receiving space and one underneath arranged interior, which has a channel with Atmosphere is connectable.

1

liner

2

hose part

4

Teat rubber head

6

head sleeve

8th

annulus

10

clamping bead

12

insertion

14

teat

16

headspace

18

Teat receiving space

20

inner space

22

gutter

24

longitudinal axis

26

teat cup liner

28

ventilation

30

corner

32

ground

34

longitudinal edges

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1219166 A2 [0002]
• - EP 1219166 [0004]
• - DE 2551931 A [0004]
• - DE 2504605 A [0004]
• - DE 10056224 A1 [0004]
• WO 00/13489 A2 [0029]

Claims (16)

Teatcup liner for milking cups, with a teatcup liner ( 4 ), which has an insertion opening ( 12 ) for a teat ( 14 ), and with a teat cup ( 4 ) subsequent hose part ( 2 ), which at least in sections a teat receiving space ( 18 ) and an interior space ( 20 ), which has at least one channel ( 22 ) is connectable with atmosphere, characterized in that the channel is dimensioned such that the from the atmosphere to the channel ( 22 ) guided air flow is at least the same size as that through the channel ( 22 ) to the interior ( 20 ) metered air flow. Teat liner according to claim 1, wherein in the teatcup liner ( 4 ) a headspace ( 16 ), which has a ventilation ( 28 ) is connected to the atmosphere, whereby the atmosphere from the ventilation ( 28 ) in the headspace ( 16 ) guided air flow at least as large as the air flow through the channel ( 22 ) to the interior ( 20 ). A teatcup liner according to claim 1 or 2, wherein the channel is defined by a channel ( 22 ) in a teat rubber wall ( 26 ) is formed. Teat liner according to one of the preceding claims, wherein several channels ( 22 ) are provided. Teat liner according to any one of the preceding claims, wherein the effective ventilation through the channel ( 22 ) to the interior ( 20 ) corresponds to the venting through a nozzle with the diameter of about 0.5 to 0.7 mm or a volume flow of about 2.0 to 6.0 l / min at 40 kPa vacuum. Teat liner according to any one of the preceding claims, wherein the channel ( 22 ) is designed such that it in the massage cycle at collapsed Titzengummiwandung ( 26 ) is formed in the region in the larger cross-section. Teat liner according to one of the preceding claims, wherein in the differential pressure neutral state, the width (B) of the channel in the contact region to the teat ( 14 ) is not larger than 1.5 mm and not smaller than 0.3 mm, preferably about 0.7 mm. Teat liner according to any one of the preceding claims, wherein the channel ( 22 ) seen in the collapsed state in cross section to the teat receiving space ( 18 ) makes an opening movement, which is particularly pronounced in machine cleaning. Teat liner according to one of the preceding claims, wherein a bottom ( 32 ) of the channel ( 22 ) is rounded. Teat liner according to one of the preceding claims, wherein the teat receiving space ( 18 ) pointing longitudinal edges ( 34 ) of the channel ( 22 ) are rounded. Teat liner according to one of the preceding claims, that the channel guide is designed so that the radius in section of the hose part in the region of the gutter also at the deformation during the massage changed only insignificantly. Teat liner according to one of the preceding claims, wherein the ventilation ( 28 ) through a recess in the circumference of the insertion opening ( 12 ) is effective. Teat liner according to claim 12, wherein the ventilation ( 28 ) is effective only in the inverted state of the import opening. Teat liner according to one of the preceding claims, wherein the ventilation ( 28 ) by at least one opening to the atmosphere in an atmosphere-side outer wall of the teatcup liner head in the region of the insertion opening ( 12 ) is formed, wherein this recess so far to the outer diameter (D) of the teatcup liner head ( 4 ), that the atmosphere-side mouth region of the ventilation ( 28 ) is not closed even in the invaginated state. A teatcup liner according to any one of the preceding claims wherein on the teat liner wall ( 26 ), preferably on the hose part ( 2 ) is formed at least a thin-wall region. The teatcup liner of claim 13, wherein the thin wall region in the massage cycle allows a conclusion to the vacuum.