SU116719A1 - Method of preventing water from boiling in tubes connecting the object under investigation with a pressure gauge during hydraulic research under vacuum conditions - Google Patents

Description

In order to prevent water from boiling in the tubes connecting the object under examination with a pressure gauge during hydraulic studies under vacuum conditions, methods are used based on the creation of an increased hydrostatic |: tatic pressure in the tubes.

The proposed method is more advanced than the known similar methods, as it allows to simplify the measurement setup and the measurement process.

This is achieved by the fact that in order to obtain an elevated pressure B of the tube at the point of their connection to the object under study, liquid columns are introduced that are heavier than water (in particular, mercury).

The drawing shows a schematic diagram illustrating the introduction of the proposed method.

In the gauges 7 and in their supply tubes, an additional hydrostatic pressure is created by placing 2 ballast columns of 3 heavy liquids (mercury) at the beginning of the supply tubes at the point of their attachment to the object under study.

In order for the readings not to take into account the pressure generated by the indicated mercury columns, they must be located in both branches x of each manometer and always have equal heights from the pressure in the system height. To do this, they are placed between wide cups 4, equipped with a system of bypass tubes i with taps 5, which are blocked in operation and open only when setting up the instruments.

Having set the required height for the posts, install the pressure gauges directly at the observation point, even if it is located no. 16719-2 -

This means that it is above the level of absolute zero pressure in the system and, thus, eliminates remote transmissions that introduce errors into the measurements.

Subject invention

The method of preventing water from boiling in the tubes, connecting their test object with a pressure gauge during hydraulic research under vacuum conditions by creating in them an increased hydrostatic pressure, is characterized in that, in order to simplify the measurement setup or the measurement process to obtain said increased pressures; columns, heavier than water, fluids, in particular, mercury, are introduced into the tubes at the site of their connection to the object under study.