RU1821102C - Air-operated pulsator - Google Patents

Abstract

Usage: in agricultural engineering, in particular in the devices of milking machines. SUMMARY OF THE INVENTION: A pneumatic pulsator comprises a constant vacuum chamber 1 and an atmospheric 2 pressure chamber, a working 3 chamber and a control chamber 4 of variable pressure. The working chamber 3 has an outlet nozzle 5, and the chamber 1 has an inlet vacuum nozzle 6. The control chamber 4 has a hole 7 on top that is closed by an elastic plug 8. The pulsator chambers are interconnected by a membrane-valve mechanism 9. In the hollow rod 10 is placed throttle rod 13. When lowering or raising the latter through the opening 7 of the control chamber, the capacitance of the throttle channel 14 and. accordingly, the pulsation frequency (change of open and closed phase per unit time) of the pneumatic pulsator. 3 ill.

Description

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The invention relates to agriculture, in particular to pneumatic pulsators for milking machines.

The purpose of the invention is to increase the stability of pulsations by maintaining a predetermined volume of the capacity of the throttle channel.

This goal is achieved in that the pneumatic pulsator contains constant vacuum and atmospheric pressure chambers, an elastic membrane and a valve connected by a hollow stem with a rod inside; between the walls of which there is a throttle channel communicating with each other a control and a working chamber of variable pressure, the rod in the rod

mounted with the possibility of fixed movement along the height, and in the cover of the control chamber there is a hole with a stopper for lowering or raising the rod in the rod.

In FIG. 1 shows a pneumatic pulsator, open phase; figure 2 is the same in the closed phase; Fig. 3 is an upper part of a pulsator with a variable pressure control chamber.

The pneumatic pulsator contains constant vacuum chambers 1 and atmospheric pressure 2, as well as a working chamber 3 and a control chamber 4 of variable pressure. The working chamber 3 has an outlet nozzle of variable pressure 5, and the chamber 1 has an input00

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No vacuum naYpy6oi 6. The variable pressure control chamber 4 has an opening 7 closed by a plug 8.

The pulsator is equipped with a membrane-valve mechanism comprising a hollow stem 10, which is connected to an elastic membrane 11 separating the chambers 3 and 4, and a valve 12 located in the chamber 1. A rod 13 is located in the hollow stem 10, between which the throttle is formed channel 14. The presence of a threaded connection allows the rod 13 to be moved down, while reducing the capacity of the throttle channels, and upward, increasing it, and fixed in the desired position. A decrease in the capacity of the throttle channel 14 leads to a decrease in the pulsation frequency of the pulsator. A fixed movement in height of the rod 13 is carried out through the hole 7 of the cover of the control chamber of variable pressure 4.

Pneumatic pulsator works as follows ..

. The vacuum inlet 6 is connected to a vacuum source (not shown). A vacuum pressure is established in the constant vacuum chamber 1. Since positive pressure is maintained at the variable pressure control chamber 4 at this time, the force generated by the pressure difference will lower the elastic membrane 11 together with the hollow stem 10 and valve 12 down. In this case, valve 1.2 closes the atmospheric pressure chamber 2 and connects the constant vacuum chambers 1 and the working variable pressure 3. The vacuum is installed in the chamber 3 and, by means of the variable pressure outlet 5, extends to the interwall space of the teat cups (not shown). Such a pulsator cycle corresponds to the open phase (sucking cycle) of the milking.

Gradually vacuum from the working chamber

3 through the throttle channel 14 penetrates into the control chamber 4. Due to the force acting on the elastic membrane 11 from the side of the control chamber

4 by vacuum, and on the valve 12 from the side of the chamber 2 by atmospheric pressure the membrane-valve mechanism 9 rises up

Valve 12 opens the atmospheric chamber

pressure 2 and disconnects chambers 1 and 3.

Atmospheric air enters the working

the chamber 3 and through the outlet pipe 5 is directed into the interwall space of the teat cups. This pulsator cycle corresponds to the closed phase (compression cycle) of the milking.

Through the throttle channel 14

atmospheric pressure is set to; control chamber 4. Based on the pressure difference, the elastic membrane 11 will lower down and the valve 12 will block the chamber 2, but will connect the chambers 1 and 3. The pulsator cycle

will repeat.

The pulsation frequency of the pneumatic pulsator is controlled by changing the capacity of the throttle channel 14 by a fixed movement of the rod

13. When the rod 13 moves downward, the change in positive and negative pressures in the control chamber 4 slows down, which is accompanied by a decrease in the pulsation frequency. .

Moving the rod 13 upward accelerates the pressure change in the chamber 4 and the pulsation frequency increases.

The pneumatic pulsator is simple in design and reliable in operation.

Claims (1)

The claims Pneumatic pulsator containing constant vacuum and atmospheric pressure chambers, an elastic membrane and a valve connected by a hollow rod to a rod inside, between the walls of which a throttle channel is formed, communicating between a control and a working variable pressure chambers, characterized in that, in order to increase the stability of pulsations by ensuring the constant volume of the capacity of the throttle channel is constant, the rod in the rod is mounted with a fixed height movement, and a hole with and a stopper for lowering is made in the cover of the control chamber raise the stem in stock. chavtFig .1 If ft Figure 2. .. Fia.Z