SU591708A1 - Hydrostatic level indicator compensating pipe - Google Patents

Description

the center of the object is symmetrically with respect to the center of the liquid mirror, and is connected to a feed collector in which a swinging valve is placed between the ends of the branches. FIG. 1 shows the proposed equalizer pipe, general view; in fig. 2 node connecting the branches of the balance pipe; in fig. 3 is a plot of the slope. - the accuracy of measuring the level of the roll angle and span of the branches. The equalizing pipe consists of two parallel branches 1 connected to a thawing collector 2, rolling flaps 3, representing, for example, a plate swinging on axis 4 attached to the blind end of the collector 2, which is fixed in the vessel body 5. Collector connected to the external fluid source 6. The pressure difference between the liquid pillars in the vessel body 5 and equalizing cable 1 is measured by the device 7. In pitching conditions when the equalizer pipe is tilted, the valve 3 node is subjected to gravity folding after the initial deflecting the valve with .ridrodi ™ by a dynamic force, covers the branch facing Kpeiia, and feeds through the second branch located above the mirror above the win. The relative foot measurement of the level measurement is defined by the formula: 3 ": - cs; -1; where is the distance from the cut of the pipe to the mirror of the liquid at ° C-0 (action ™ tel and level 1); the distance from the cut of the pipe to the core of the OS-kaa liquid npiioi O (the apparent level is 5–7 is the reduced span of the branches; where a is the distance between the axes of symmetry

branches;

with „roll angle.

The application of an additional branch of the equalization pipe adds to the negative error S ll C03of-l a negative term a fe-tn os, the caNtHM decreasing its value. The curves (5H i (ix) for oO) lie above the curve for Q -O. This is geometrically explained by lifting the branch opposite to the roll, above the rest of the mountain, with a liquid mirror and is easily checked graphically.

The effect of the reference span O on the relative measurement error of the B conditions of the heel is shown in FIG. 2. Ove; 1; chenie Q shifts the magnitude of the error to the position. direction.

Ф о р. М у л and inventions

The equalizing pipe of a hydrostatic level gauge, located inside the vessel. The measuring level of the liquid is connected to an external source of liquid and rigidly fixed in the vessel body, so that it is possible to reduce the level of measurement error. of an object, for example, a vessel, said pipe is made of two parallel branches located in a plane perpendicular to the diametrical plane of the object, symmetrically with respect to the center of the liquid mirror and connected to elichiny Q for the tank to be installed on a particular Time vessel must in turn determine the operational characteristic of the roll angle range vessel gtsy dependent on displacement of the vessel, its destination and the navigation areas. Then, from the family of curves for errors at different a, it is necessary to choose the least deviating from the abscissa axis in the obtained range of angles, thereby obtaining the optimum value 3 Since in ship’s apparatus and tanks (deaerators, condensers, evaporators, tanks, etc.) within a certain range, according to the average value of H and a semi-infantile 5 °, determine the span of the branches of the balancing pipe. At the optimum value of the branch of the balancing pipe, the relative measurement error of the level in the range the angles of vessel rolls that are not possible during operation are on average three times less than when using a known device.If you do not overlap the feed with the (lower) branch of the pipe facing the roll, then in the upper branch the liquid level will not reach the cut of the pipe according to the law, the vessels are reported at the level of the cut of the pipe. Spacing in the levels in this case will be determined by the magnitude of the hydraulic resistance to the flow of the make-up fluid through the nuchal branch and, due to the insignificant expenditure on the make-up, will be insignificant. In other words, without overlapping the branches, the chain of the invention — reducing the error in measuring the level — that can be achieved. Measuring the fluid level in a closed vessel reduces to measuring the difference in hydrostatic pressures of the liquid columns in the vessel body and in the balancing pressure proportional to the level of the liquid.

Pigayushim collector, in which between the ends of the branches is located rocking valve.

Sources of information taken into consideration. mania during examination:

1. US patent No. 2347860, CL. 73-299, 1944.

2. Shifrin M. Sh. Automatic control of ship steam power plants, L., 1963, p. 52-55.

(fiuaJ

extra

0.2

0.1

-0.2

-OA

50 ° ((gra))

h

, 2

a 0.1

(protopshp)

Fig.Z