SU393578A1 - HYDROSTATIC LEVEL - Google Patents

Description

The invention relates to the field of instrumentation, IB in particular to geodetic instruments, and is intended primarily for leveling water surfaces.

Hydrostatic levels are known, containing communicating means of tube sleeves (vessels) made of transparent material with devices for reading the level of liquids filling them.

In order to speed up the process of measuring and directly fixing the horizon of the leveling water surfaces, the proposed level is provided with additional tubes with reading devices communicating with the water body and fixing the water level in predetermined water surface levels at the time of leveling. Each of the additional pipes is installed adjacent to the main one on one basis.

FIG. 1 shows a schematic diagram of the proposed level; in fig. 2 - layout of the level when leveling the reservoir.

The level contains two main glass tubes / with openings in the upper and bottom parts and two additional glass tubes 2j also formed with openings. Tubes 1 and 2 are installed in pairs on two brass bases 3, each of which has two cups with a bottom opening, connected by a diameter.

The tubes 1 are connected by a flexible hose 4 made of rubber or polyethylene. Taps 5 are provided at the connection points. Taps 6 are attached to the outlets from the tubes 2.

At the upper end of each of the four tubes are mounted a brass sleeve 7 and a readout device, including a ruler 5 with millimeter divisions and a tongue, which can be raised or lowered using cremoleur 9 and a drum 10 with a nonius for accurate reading of the displacement of the ruler.

To prepare the level for work, it is necessary on the shore of the reservoir 11 in the ground 12 to perform a concrete well 13 with a concrete base 14 on which the left side of the device is installed. Steel pipes 15 and 16 are laid between the well and the reservoir. At one end of the pipe 15 a filter 17 is mounted, and at the other - a crane 6; With the help of a rubber hose 18, this pipe is connected to the tap of the tube 2. At one end of the tube 16, a gland 19 for the hose 4 is fastened, and a tap 5 and a hose 4 are mounted on the other end.

The right side of the level is mounted similarly at the required (specified) distance.

The preparation of the device for leveling is completed by opening the taps 5 into the tubes / through the upper opening, pouring water up to the quince levels (theoretical (a 0, but for; convenience of presentation, two letters of designation are accepted). Then, opening the tap 6, from the reservoir iodine water in the tube 2 of the left and right parts of the level, respectively, to levels c and d.

The level works as follows.

After filling the tubes 1 and 2 of both parts of the device with water, rotate the cremolera; the drum 10 is then rotated and the ruler is lowered until the point of contact with the water mirror in all the tubes. Then simultaneously take readings of levels a, c, d vi b.

The excess of the level of one point of the reservoir over another (AL) is calculated by the formulas:

Hi c-a

& h (с-а) - (d-b)

where H is the water level difference in the tubes ./ and 2 of the left side of the level;

HZ is the water level difference in tubes 1 and 2 of the right part of the level.

In order to avoid the influence of different air and water temperatures in the reservoir, it is necessary to lay the shlang 4 into the water of the reservoir along the shore.

Subject invention

The hydrostatic level is mainly for leveling 1 water surfaces,

containing communicating tubes with devices for reading the water level therein, characterized in that, in order to speed up the measurement process and directly fix the level of leveled water surfaces, it is equipped with additional tubes with devices for reading the water level, each of which is installed near from the ground on the same base and communicating with the pond at the research point.

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