RU2298318C2 - Milk meter testing stand - Google Patents

Abstract

FIELD: equipment for testing of milk meters used in animal farming.

SUBSTANCE: milk meter testing stand has bearing construction, milk reservoir, teat simulating devices, control unit and unit for simulating various modes of flowing of air-and-milk mixture. Stand has graded holder with bracket for moving of meter under study in vertical plane and determining height at which milk meter shows minimum error. Control unit consisting of standard liquid flow meters is positioned between milk reservoir and teat simulating devices. During milking, controlling of amount of delivered milk is carried out simultaneously with error controlling of milk meter and standard liquid flow meter.

EFFECT: quick, simplified and precise determination of errors in indications of milk meter under study.

1 dwg

Description

The invention relates to equipment for testing milk meters, as well as evaluating the measurement error of the amount of milk milk.

A known stand [1] for determining the performance of the milking machine, which is also used to check the mass produced milk counter UZM-1A for accuracy of readings. The stand consists of weights, a milking machine with teat cups, a vacuum pipe, three tanks with liquid taps and nipple simulators. To check the milk meter for accuracy of readings, when the milking machine is switched on, every 30 seconds the readings of the scales and the verified milk meter are simultaneously recorded. At the end of milking, the readings of the verified counter and weights are compared and the relative measurement error (prototype) is calculated [1].

Work with a pulsating liquid and insufficient discreteness of the reference device (scales) do not allow achieving the necessary accuracy in determining the measurement error. In addition, excessive structural complexity of the bench may interfere with testing.

With the help of the stand it is possible to test milk meters and check them for accuracy of readings. However, such use of the stand is inefficient and does not justify the cost of its creation.

The objective of the invention is to eliminate the above-mentioned disadvantages of the device adopted for the prototype. To do this, we propose a test bench for testing milk meters, which will quickly and accurately determine the error of readings allowed by the verified milk meter. Using the stand, you can track the dynamics of the accumulation of errors and determine the modes under which the system "milking unit - milking machine - milk meter" works most efficiently.

The essence of the invention lies in the fact that the stand is equipped with a node simulating various modes of movement of the milk-air mixture, a calibrated tripod with a bracket and reference liquid meters connected to a PC.

The proposed stand, shown in the drawing, consists of a supporting structure 1, a container for milk (substitute) 2, a control device in the form of reference liquid meters 3, four nipple simulators 4, a switching unit 5, a personal computer 6, a unit simulating various modes of movement of the milk-air mixture 7, as well as a calibrated tripod 8 with an arm 9 for moving the verified meter 10 in height. The stand works complete with a milking unit, which includes the hanging part of the milking machine 11, a vacuum regulator 12, a vacuum gauge 13, a vacuum pipe 14, a milking bucket 15, a vacuum unit (not shown in the drawing), interconnected by milk and vacuum hoses .

The control device is located between the milk container 2 and the nipple simulators 4.

The stand works as follows. The required amount of milk (substitute) is poured into the container 2, after which the liquid enters the control devices 3.

Using a vacuum gauge 13 set the vacuum regulator 12, the required value of the vacuum pressure in the system. Check the compliance of the performance characteristics of the milking machine 11 with the passport data.

During milking, the amount of milk milk is recorded at the same time as a verified milk meter and reference liquid meters. The measurement results of exemplary devices enter the switching unit 5. Then, the processing and display of data on a personal computer 6.

The node for simulating various modes of movement of the milk-air mixture allows you to determine the optimal modes in which the system "milking unit - milking machine - counter" works most efficiently, and the counter has the least error.

To determine the installation height of the counter, at which it has a minimum error, the stand is equipped with a graduated tripod with a bracket that allows you to move it in height.

Literature

1. Vorobyov V.A. and others. Workshop on mechanization and electrification of livestock. - Moscow: Kolos, 1980, 192 p. (prototype).

Claims (1)

A test bench for milk meters, containing the supporting structure, milk container, nipple simulators, milking machine, milk and vacuum hoses, a vacuum regulator and a vacuum gauge, characterized in that it is equipped with a control device in the form of reference milk meters, a unit for simulating various modes the movement of the milk-air mixture and a graduated tripod with a bracket for moving the test meter in height, while the control device is located between the milk container and the nipple simulators.