SU378203A1 - PNEUMATIC SYSTEM FOR CREATING A VARIABLE VACUUM IN MILKING DEVICES - Google Patents

Description

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Pneumatic systems are known for creating a variable vacuum in milking machines, containing a vacuum wire, a pulsator and a pulsorel, the control chambers of which are connected by a variable vacuum pipeline.

In order to stabilize the frequency of the pulsations, regardless of the vacuum level in the supply vacuum pipe, deaf chambers of variable volume, depending on the pressure in them, are installed at the ends of the variable vacuum pipeline.

The drawing shows a pneumatic system for creating a variable vacuum in milking machines. It consists of a supply vacuum /, a pulsator 2, a pulsorele 3 and 4, a pipeline 5 of variable vacuum and deaf chambers of variable volume 6.

The pulsator has a constant vacuum chamber A, an alternating vacuum chamber B, a control chamber 5. The control chamber is connected to chamber 5 by means of a channel a.

A membrane 7 is located between chambers A and B, which controls valve 5. Pulsorele also contains constant vacuum chambers D and D, permanent vacuum E and F chambers, and control chambers 3 and I. Between control chambers and constant vacuum chambers. there are membranes P and / (which also control the valves

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/ - /. The chambers and the pulsator combine with the milking apparatuses by means of nozzles 14 and 15. When the vacuum source is turned on in the supply vacuum duct and in the chambers L, G Hi / f, a vacuum is formed. Valve 5 in a pulsator and valves // - In a pulsorel down. In pulsorel 3, the valve is located inside chamber E, and B is nulsorele 4 valves 12 and / 5

are located on the outside of chamber W, therefore, when the valves are in the lower position in the pulsator, 3 valves / 7 connect the chamber to chamber D and disconnect it from the atmosphere. In the chamber and in the interstitial chambers of the teat cups connected to the pulsor 3, a vacuum is formed (this corresponds to the sucking stroke).

In pulsorel 4, the upper valve 13 separates chamber W from chamber D, and valve 12 connects it to the atmosphere. The interstitial chambers of the teat cups connected to the α-pulsator 4 are filled with air to atmospheric pressure. (This corresponds to the compression and rest cycles).

As the pressure in chamber B of the pulsator and in chambers 3 and I of the pulsator decreases, the force acting on the membranes 7, 9 and 10 from top to bottom becomes less than the force acting on valves 11 and / 5 from bottom to top.

Thanks to this valve // in pulsorel 3

3

rises upward and separates chamber E from chamber D and connects it to the atmosphere. The interstitial chambers of the glasses connected to the relay 3 are filled with air to atmospheric pressure. (This corresponds to the compression and rest cycles).

In relay 4, valves 12 and 13 also lift up, valve 13 opens and connects chamber W to chamber D, and lower valve 12, when closed, separates chamber J from the atmosphere.

In the chamber Alive interstitial chambers of the teat cups connected to the chamber G of relay 4, a vacuum is formed (this corresponds to the sucking tact).

After switching the valves in the pulsorel, the valve 8 in the pulsator rises upward and separates chamber A from chamber B and connects it to the atmosphere.

In chamber pulsator B and chamber 3 and pulsule I, the pressure increases, and then the cycle repeats.

Pondas of the upper and lower valves in pulsator 5 and 4 with respect to the plate, the diaphragms are chosen so that the valves switch at pressures in chambers 3 and I in the pulsorel, which provide the necessary ratio of strokes in the milking machine.

When decreasing or increasing

vacuum in the power vacuum vacuum line respectively decreases or increases the amplitude of the sawtooth vacuum change in the chamber B of the pulsator, in the chambers 3 and I of the pulsorel, in the variable vacuum pipeline and in the blind chambers of variable volume.

With an increase in the level of vacuum in a powered vacuum pipe, the volume of deaf chambers decreases, and with a decrease in the level of vacuum increases.

Due to this, regardless of the level of vacuum in the vacuum pipe, the time of filling and emptying chambers B, 3 and AND of the pipeline of alternating vacuum and deaf

variable volume chambers remain constant.

Subject invention

A pneumatic system for creating a variable vacuum in milking machines, including, and supplying, a vacuum pipe, a pulsator and a pulsorel, control, the chambers of which are connected to an alternating vacuum pipe,

characterized in that, in order to stabilize the frequency of the pulsations, regardless of the vacuum level in the power supply, we use the vacuum tube, at the ends of the variable vacuum pipeline, blind cells of variable volume are installed,

hovered on from them.