JPH0328162B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a milking device for dairy cows, etc.

Traditionally, milking using a milking machine involves transmitting the vacuum generated by a vacuum pump to a vacuum pipe and a milk pipe, and then reaching the teat through a milk tube, milk claw, and teat cutoff liner to express milk. Since the inside of the milk tube and the milk pipe are blocked by the milk, the milking vacuum pressure inside the milk claw is significantly lower than the set value. Therefore, in order to maintain the vacuum pressure necessary for milking and holding units such as teat cups in the milk claw even if the amount of milk flowing out increases, the vacuum pressure must be set high in advance. or,
Even if the milking vacuum pressure inside the milk claw decreases, the operating vacuum pressure of the pulsator connected to the vacuum pipe does not decrease due to the air circuit, so high vacuum pressure is transferred from the pulsator to the outside of the teat cutter. The pressure is transmitted to the pulsation chamber of the pulsation chamber, creating a pressure difference between the inside and outside of the Teit cut liner, causing the Teit cut liner to expand.

For this reason, while the amount of milk flowing out is small, the high vacuum directly reaches the teat, causing frequent teat damage, and the expansion of the teat cutoff liner causes milk that has been expressed to flow back to the tip of the teat. There is a disadvantage that the teats are washed with bacteria in the milk, increasing the risk of bacterial infection.Furthermore, the milking vacuum pressure in the milk claw fluctuates greatly, which reduces the pine surge effect and causes discomfort to the cow. The disadvantage was that it caused an increase in mastitis and a decrease in milk yield.

As a device to eliminate these drawbacks, U.S. Patent No. 4,033,295 describes a device that switches the vacuum pressure applied to the milk tube between high and low levels depending on the amount of milk flowing out. As the vacuum pressure decreases and fluctuates greatly, the expansion of the teat cut liner causes the milk that has been expressed to flow back to the tip of the teat, washing the teat with bacteria in the milk and causing bacterial infection. It has not yet been possible to solve the above-mentioned drawbacks, which increase the risk, reduce the pine surge effect, cause discomfort to dairy cows, increase mastitis, and decrease milk yield.

In addition, U.S. Patent No. 4,314,526 describes a milk claw that separates milk expression and milk feeding by installing a valve inside the milk claw, but if the milking vacuum pressure is not set lower than that of a normal milking device, the milk will not flow. When the outflow is low, the high vacuum reaches directly to the teats, causing frequent teat damage.If the setting is low, the milking time becomes longer and the milking unit is more likely to fall, which reduces milking efficiency. .

The present invention eliminates the drawbacks of the conventional milking device described above, increases or decreases the milking vacuum pressure in the milk claw and the operating vacuum pressure of the pulsator in response to milk outflow, thereby eliminating teat obstruction and improving work efficiency. The purpose of the present invention is to provide a device that enables improvement.

The present invention will be described in detail below with reference to an attached embodiment.

Reference numeral 1 denotes a milk claw whose interior is partitioned into a low vacuum pressure chamber 3 and a milk reservoir chamber 4 by a diaphragm 2, and a pressure regulating rod 5 is connected to the diaphragm 2. The low vacuum pressure 3 is provided with a pressure regulation true connection port 6, the milk reservoir chamber 4 is provided with a milk reservoir port 7 and a bleed hole 8, and the high vacuum chamber 9 is provided with a pressure regulation hole 10 in the center of the milk reservoir chamber 4. A milk outlet 12 and a valve 13 are provided, the valve 13 being able to open and close the milk outlet 12 . The teat cup liner 14 is attached to the milk inlet 7 and forms a pulsating chamber 16 with the teat cup liner 15.

The high vacuum chamber 9 includes an atmospheric chamber 19 that communicates with the atmosphere via a filter 18 and is isolated via a diaphragm 17, and has a pressure regulating port 22 and a vacuum outlet 23 connected to a vacuum pipe 34. The chamber 20 communicates with the atmospheric chamber 19 through an opening 21, and the diaphragm 17 is arranged to open and close the opening 21 based on the differential pressure between the high vacuum pressure 9 and the pressure regulating chamber 20.

24 is a vacuum regulator, inside is a diaphragm 25
The diaphragm 25 is separated into a pressure regulating chamber 26 and a pressure regulating chamber 27 via a pressure regulating rod 28 . A vacuum input port 29 is provided in the pressure regulation chamber 26, and a vacuum input port 29 is provided in the pressure regulation chamber 26.
7 has a pulsator connection port 30 and a vacuum output port 31
A communication hole 32 is provided which connects to a vacuum pipe 34.

33 is a milk pipe, 34 is a vacuum pipe, a milk hose 35 is connected to the milk pipe 33 and the milk outlet 12 of the milk claw 1, a vacuum connection pipe 36 is connected to the vacuum pipe 34 and the communication hole 32 of the vacuum regulator 24, A vacuum connection hose 37 connects the vacuum pipe 34 and the milk claw 1 vacuum connection port 22.

The pressure regulating vacuum connection port 6 and the vacuum outlet 23 of the milk claw 1 are connected to the vacuum tube 38 and tube 3, respectively.
9 is connected to a vacuum output port 31 and a vacuum input port 29 of the vacuum regulator 24, and a pulsator 40 is connected to a pulsator connection port 30 of the vacuum regulator 24.

The present invention configured as described above operates as follows.

First, to start milking, the respective hoses are connected to the milk pipe 33 and the vacuum pipe 34 as shown in FIG. As a result, the high vacuum chamber 9, milk reservoir chamber 4, and Tate cutoff liner 14 in the milk claw 1 are kept in an atmospheric condition and cannot be milked, but the vacuum transmitted through the vacuum connection hose 37 is In order to create a vacuum in the pressure regulating chamber 20, the diaphragm 17 is drawn to the opening 21 and comes into close contact with the atmospheric chamber 19.
Atmospheric air no longer flows into the pressure regulating chamber 20, and the vacuum pressure in the pressure regulating chamber 20 is directly led to the pressure regulating chamber 26 of the vacuum regulator 24 via the vacuum outlet 23 and the tube 39.

On the other hand, the vacuum transmitted through the vacuum connection pipe 36 reaches the communication hole 32 of the vacuum regulator 24 shown in FIG. A differential pressure is generated on both sides of the diaphragm 25 and the pressure regulating rod 28.
moves upward, so the communication hole 32 and the pressure regulating rod 28
The vacuum is transmitted to the pressure regulating chamber 27 from between the two, and further to the pulsator 40 via the pulsator connection port 30.

Since a fixed amount of air flows in from the pulsator 40, the pressure regulation chamber 27 is connected to the diaphragm 25 and the communication hole 3.
A predetermined vacuum pressure is maintained by the area ratio of 2 and the vacuum pressure, and this vacuum pressure is led from the pressure regulating vacuum connection port 6 of the milk claw 1 to the low vacuum pressure chamber 3 via the vacuum output port 31 and the hose 38, and is connected to the diaphragm. A differential pressure is generated on both sides of the diaphragm 2 and the pressure regulating rod 5 to move the diaphragm 2 and the pressure regulating rod 5 upward.

During milking, when the on-off valve 13 is pushed upward and the milk outlet 17 is opened, a vacuum is created in the high vacuum chamber 9 and the pressure adjustment hole 1.
0, the milk reaches the teat cup liner 14 via the milk reservoir 4 and the milk inlet 7.

When the vacuum pressure in the milk storage chamber 4 increases, the differential pressure between the two sides of the diaphragm 2 decreases and moves downward, and the pressure regulating rod 5 closes the pressure regulating hole 10 and prevents the vacuum from being transmitted. Atmospheric pressure always flows in and lowers the vacuum pressure, but if the vacuum pressure drops too much, the differential pressure across the diaphragm 2 increases and moves upward, widening the gap between the pressure regulating hole 10 and the pressure regulating rod 5. The vacuum pressure increases, and by repeating this operation, the vacuum pressure in the milk storage chamber increases between the diaphragm 2 and the pressure regulating hole 1.
It tries to maintain a predetermined vacuum pressure depending on the area ratio with 0.

While the milk flow rate is low, the vacuum pressure in the high vacuum chamber 9 is high, so the diaphragm 17 is pulled toward the high vacuum chamber 9 side by the differential pressure between the high vacuum chamber 9 and the pressure regulating chamber 20.
A gap is created between the opening 21 and the diaphragm 17, and a small amount of air that has passed through the filter 18 flows into the pressure regulation chamber 20, reducing the vacuum pressure in the pressure regulation chamber 20. When this reduced vacuum pressure is introduced into the pressure regulating chamber 26 of the vacuum regulator 24, the pressure difference between both sides of the diaphragm 25 is reduced and the pressure is moved downward, so that the pressure regulating rod 28 reduces the gap with the communication hole 32. As a result, the operating vacuum pressure of the pressure regulating chamber 27 and the pulsator 40 is lowered.
Furthermore, this reduced vacuum pressure is passed to the low vacuum pressure chamber 3 of the milk claw 1, so the diaphragm 2 moves downward and the pressure regulating rod 5 narrows the gap with the pressure regulating hole 10, thereby increasing the milk reservoir chamber 4 and the tray. Eat cutlet liner 14
Reduce the milking vacuum pressure inside.

As the milk outflow increases, the milk hose 35,
Although the inside of the milk pipe 33 is blocked by milk and the vacuum pressure in the high vacuum chamber 9 is lower than the initial level, the diaphragm 17 is attracted to the opening 21 due to the decrease in differential pressure, reducing the amount of atmospheric air flowing into the pressure regulating chamber 20. Therefore, the vacuum pressure in the pressure regulating chamber 20 increases. When this increased vacuum pressure reaches the pressure regulation chamber 26 of the vacuum regulator 24, the diaphragm 25 moves upward, widening the gap between the pressure regulation rod 28 and the communication hole 32, and increasing the vacuum pressure in the pressure regulation chamber 27. As the operating pressure of the pulsator 40 is increased, the vacuum pressure in the low vacuum pressure chamber 3 of the milk claw is increased, and the diaphragm 2 is moved upward to widen the gap between the pressure regulating rod 5 and the pressure regulating hole 10, and the milk reservoir is increased. The milking vacuum pressure in chamber 4 and teat cup liner 14 is increased.

Also, the atmosphere is extremely tight cutoff liner 14
If the milk flows in from the milk outlet, the valve 13 is activated to close the milk outlet 12, and milking is interrupted.

In this embodiment, the diaphragm 17 is used to open and close the opening 21 based on the differential pressure between the high vacuum chamber 9 and the pressure regulating chamber 20 of the milk claw 1, but the invention is not limited to this. It may also be something that isolates the air and is actuated by differential pressure, such as a cylinder.

As described above, according to the milking device according to the present invention, when the milk outflow is small, the milking vacuum pressure is kept low and at the same time the operating vacuum pressure of the pulsator is lowered, while the milk outflow increases and the vacuum pressure in the high vacuum chamber decreases. At the same time, the milking vacuum pressure is increased and the pulsator operating vacuum pressure is also increased. Therefore, the milking vacuum pressure and the pulsator operating vacuum pressure are always controlled in accordance with the milk flow rate, which prevents teat damage and improves milking. Since the vacuum pressure and the pulsator operating vacuum pressure always maintain a balance, there is no backflow of milk, and when a large amount of milk flows out, the milking vacuum pressure is high, resulting in high work efficiency.
Moreover, it is possible to obtain a milking device that has a high pine surge effect and is most suitable for the so-called lactation physiology.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a milk claw according to the present invention, Fig. 2 is a cross-sectional view of a vacuum regulator according to the present invention, and Fig. 3 is a schematic diagram showing how the milk claw and vacuum regulator are used in a pipeline milker. It is a diagram. 1... Milk claw, 2, 17, 25... Diaphragm, 3... Low vacuum chamber, 4... Milk reservoir chamber,
5, 28...Pressure regulation rod, 6...Pressure regulation vacuum connection port, 7
...Milk inlet, 8...Bleed hole, 9...
...High vacuum chamber, 10...Pressure adjustment hole, 11...Plate, 12...Milk outlet, 13...Valve, 19...
...Atmospheric chamber, 20, 26, 27...Pressure control chamber, 21...
...Opening, 22...Vacuum connection port, 23...Vacuum outlet, 24...Vacuum regulator, 29...Vacuum input port,
30...Pulsator connection port, 31...Vacuum output port, 32...Communication hole, 34...Vacuum pipe.

Claims (1)

[Scope of Claims] 1. A milk reservoir chamber having a milk inlet isolated via a diaphragm, a low vacuum chamber having a pressure regulating vacuum connection port, and a milk reservoir chamber isolated from the milk reservoir chamber by a plate having a pressure regulating hole in the center. A milk crawler is divided into a high vacuum chamber and a high vacuum chamber having a milk outlet, and a pressure regulating rod is connected to the diaphragm to open and close a pressure regulating hole based on the differential pressure between the milk storage chamber and the low vacuum chamber. In a milking device using
A milking device characterized in that a low vacuum chamber and a vacuum pressure driven pulsator are connected to the vacuum regulator. 2 A pressure regulating chamber having a connection port connected to a vacuum pipe and a vacuum outlet is connected to an atmospheric chamber communicating with the atmosphere through an opening, and a diaphragm is used to open and close the opening based on the differential pressure between the high vacuum chamber and the pressure regulating chamber. A mechanism equipped with
A pressure regulating chamber having a vacuum input port isolated via a diaphragm, a pressure regulating chamber having a pulsator connection port, a vacuum output port, and a communication hole connected to a vacuum pipe, and a pressure regulating chamber having a vacuum input port isolated through a diaphragm; A patent claim characterized in that a vacuum regulator controlled to generate vacuum pressure that changes in inverse proportion to high vacuum pressure is formed by a mechanism connected to a pressure regulating rod that opens and closes a communication hole depending on the pressure. The milking device according to item 1. 3. The milking device according to claims 1 and 2, characterized in that a bleed hole is bored in the wall of the milk reservoir of the milk claw. 4. The valve provided in the high vacuum chamber of the milk claw is an on-off valve operated by differential pressure, and is configured to close the milk outlet when the vacuum pressure in the high vacuum chamber drops. A milking device according to claims 1 to 3. 5. Claims 1 to 4, characterized in that the diaphragm that opens and closes the opening communicating with the atmosphere based on the differential pressure between the high vacuum chamber and the pressure regulating chamber of the milk claw is made of rubber, plastic, or a corrosion-resistant metal member. The milking device according to any one of paragraphs.