SU623123A1 - Installation for pressure transducer testing - Google Patents

Description

The invention relates to the field of instrumentation, in particular to devices for testing pressure gauges.

A known installation for testing aavac sensors, comprising a dead weight piston manometer and a collector for attaching the sensors being scanned lj |.

In this installation, as the medium with which the pressure is transmitted to the instrument being tested, an oil is used on which the piston pressure gauge operates. Therefore, after checking the devices require processing of their working cavity under an aggressive environment, as the oil reacts with aggressive media.

The closest in technical essence and achievable technical affection is a device for calibrating oxygen pressure transducers containing a piston pressure gauge filled with a mask, a manifold for connecting pressure gauges and a separation chamber, which allows the pressure in the pressure gauge to be pressurized by C2j,

When calibrating pressure transducers for measuring oxygen pressure, separation chambers of various designs are used. The use of a separation chamber that transmits pressure to the test instruments using water prevents them from being in direct contact with the oil of the load gauge gauge, but does not exclude the possibility of oil entering the instruments, since water may partially shift with the oil in the form of an emulsion. After testing, the working cavities of the devices are degreased, cleaned and subjected to cleanliness control, which complicates the operation of gauges and sensors operating on oxygen. The aim of the invention is to prevent the ingress of oil into the devices being tested.

This goal is achieved by the fact that in a device for calibration of pressure transducers containing a piston-type manometer filled with oil, a manifold for connecting pressure transducers

Claims (2)

 The separation chamber, located 62 between the collector and the cargo piston gauge, between the separation chamber and the collector, two separating cameras are additionally installed, the camera connected in the lower part with the cargo piston manometer, filled with oil, connected to the upper part with the collector, is an oil solvent, and an the chamber connected to the upper part with the chamber filled with oil, and the lower part with the chamber filled with liquid by solvent, is filled with a liquid that is not miscible with the oil and its growth a solvent with a specific weight exceeding the specific weight of oil and solvent. The drawing shows the installation schema. The installation contains a piston pressure gauge, including a cargo piston: column 1, valve pump 2, press 3, supply tank 4 and valve 5 filled with oil and connected to the manifold 6 provided with fittings through separation chambers 7-9. Chamber 7, connected to press 3, is filled with Mael, chamber 8, connected with manifold 6, with alcohol, and intermediate chamber 9 is filled with zhizkost representing a high-density perfluoropolyether fraction that does not mix with oil and alcohol. chambers 8 with alcohol installed flax tank Yus valve 11, Each chamber has a body 12, an upper fitting 13 with a nozzle 14, drawn into the lower part of the hull 12, and a lower fitting 15 with a fitting 16, fitted into the upper part of the housing 1 The installation works as follows , Cameras 7-9 are full ny through the top fitting 13, and then mounted on the installation. A turnable pressure transducer is connected to the collector 6, the valve 5 is closed. Using a valve pump 2 and a press 3, pressure levels are created, which control column 1. The pressures set from press 3 are transmitted through chambers 7-9 to collector 6 with calibrated instruments. The pressure is relieved by opening the valve 5, and the oil from the System flows through the valve 5 into the supply tank 4. 34 During the operation of the installation, part of the separation chamber of the separation chamber is equipped with suitable instruments. To replenish the alcohol valve opens. 11 tank 1O. With increasing pressure and its discharge, it is possible that liquid enters chambers 7 and 8, as well as oil and alcohol — into chamber 9. However, in any case pressure on alcohol in chamber 8 is transmitted through liquid 6, and oil from Kdmer 8 is excluded, since This liquid does not mix with oil, and since the oil has a specific weight that is much smaller than liquid, it can only be located in the upper part of chamber 9. Thus, the proposed installation eliminates the degreasing of calibrated devices after they have been calibrated at the installation. Formula of calibration and installation for calibration of pressure converters containing oil-filled piston pressure gauge, manifold for connecting converters and separation chamber located between the collector and piston pressure gauge, characterized in that in order to prevent oil from entering the pressure transducers , between the separating chamber and the collector, two separating chambers are installed, the chamber connected in the lower part with the cargo-piston manometer, is filled with oil, to the measure, connected by the upper part to the collector, is an oil solvent, and the intermediate chamber, connected by the upper part to the chamber filled with oil, and the lower one to the chamber filled with liquid, the telvm solution is filled with liquid that is not miscible with the oil and its solvent, with specific gravity The specific gravity of the oil and of the solvent. Sources of information taken into account in the examination 1. USSR author's certificate ffe 2O5344, cl. G O1 L 11/00, 1968. 2. Instructions № 4-53. Committee of Standards, Measures and Measuring Instruments at the Council of Ministers of the USSR, p. 70, 1963. .t Have €  p m g-1 p / 4 " IS / P well