SU1686306A1 - The level - Google Patents

Abstract

The invention relates to geodetic instrumentation and can be used in determining the magnitude and direction of inclination of various structural elements. The upper part 2 of the ampoule is made of a transparent semi-rigid material and is connected by its center point to the micrometer node 5 mounted on the bracket. In the lower part of the 1 ampoule there are two holes 10 and 11, in one of which a plug is installed, and the other is connected to a hollow air chamber 12 with a valve. Using the micrometer node 5, the curvature of the upper part 2 of the ampoule is changed, which leads to a change in the scale division price and the expansion of the measurement range. 3 il.

Description

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The invention relates to geodetic instrumentation, in particular to devices for determining the angles of deviation from the horizontal or vertical plane of various structural elements during assembly, installation or research work.

The aim of the invention is to expand the measurement range by changing the scale division price.

FIG. 1 shows the level plan; in fig. 2 shows section A-A in FIG. one; FIG. 3 shows a cut-off BB in FIG. one.

The level contains a composite ampoule, the lower part 1 of which is made of metal, and the upper, working part 2 is made of semi-rigid transparent material, a circular scale 3 is applied to the outer side of the transparent part, a micrometer node 5 mounted on the bracket 6 having a hole 7 located on the perpendicular to the working surface in the center of the circular scale 3. The bracket 6 is rigidly fastened to the lower metal part of the ampoule 1. A clamping index 8 is attached to the bracket 6. In addition, a node 9 is attached to the bracket 6 izirovaniya. Holes 10 and 11 are made in the metal part 1. Hole 10 is equipped with a hermetic plug, and the bubble size control chamber 12 is attached to the hole 11 through the valve. end under which a uniform radial scale is applied.

Before use, the level is examined, the required number of turns of the micrometer screw is determined, and the readable index is recorded at various values of the level division price with the help of the level examiner. The level works as follows. The level is set on the test surface and with the help of the sighting tube of the node 9 is oriented to a remote local object. By rotating the micrometer node 5, the read index 8 is set to a predetermined value corresponding to the value of the required level division price. Further, to regulate the size of the air bubble 13, through the opening 11, air is passed into the ampoule by means of an adjustment chamber 12 attached through the valve to the opening 11.

The inclination angle is determined from the position of the air bubble 13 relative to the digitized dial 3.

further, rotating the inclination direction indicator 14, establish its axis in the direction where the air bubble 13 is located, and the transverse scale 15 moving to

the groove of the tilt direction indicator 14 is mounted on the center of the air bubble 13. If the air bubble 13 is not symmetrical with respect to the transverse scale 13, then by rotating the tilt direction indicator 14, the air bubble 13 is symmetrically located on the transverse scale 15. Next, using a vernier 16 located at the end of the tilt direction indicator 14

a uniform radial scale is applied to the edge of the upper working part 2, a reading indicating the direction of inclination is taken.

If it is necessary to change the division price, rotate the micrometer node 5 until the reading index index 8 is obtained, corresponding to a different value of the division level price.

Level bubble adjustment is carried out in the following sequence. With the maximum spherical working surface with the cap turned out, the holes 10 pour liquid into the ampoule, leaving a volume of air in the ampoule slightly smaller than the predetermined volume of bubble size, add air into the ampoule from the chamber before the first small air bubbles pass into the ampoule and wrap the cap completely.

When reducing the sphericity of the working

the surface in the ampoule is overpressured and the bubble size increases slightly. By tilting the housing so that the bubble is against the opening 11, rotating the screw of the control chamber, pump out a portion of the air of the bubble and set the level housing to the working position. If the bubble size is larger than the specified one, the previous operation is repeated again and it is achieved that the bubble size is not much smaller than the selected one. The screw of the plug is loosened, and a part of the liquid is displaced before the first small air bubbles enter the ampoule and the screw of the plug is wrapped. If the bubble size is left with a smaller one, then the missing volume of air is added from the control chamber.

The level division level is determined depending on the radius of the arc of the working surface.

5 For a circular level with a radius of 120 mm and with a d division price of 10, the arc radius should be R 41 m, with the linear magnitude of the beating of the working surface relative to the plane equal to 0.17 mm.

If it is necessary to change the price of dividing the level by 20, 30, 40 50. 60 arc radius should be R 20 m, 14 m, 10 m, 8 m, 7 m, respectively, and the linear magnitude of the bend of the working surface relative to the plane is 0.36; 0.52; 0.72; 0.9 and 1.03 mm, respectively.

With a dividing price of the radial scale equal to 15, which corresponds linearly with a radius of the radial scale equal to 120 mm, a distance of 0.5 mm, and using a reference vernier 16, the accuracy of determining the direction of tilt is 1.5.

The proposed level allows you to expand the measurement range by quickly changing the curvature of the working surface of the ampoule during operation and determining the direction of tilt directly on the indicator, combined with a dial, with a single instrument installation.

Claims (1)

The invention contains a level of a round, sealed ampoule with an upper and lower part, filled with a liquid with an air bubble, a sighting assembly, a tilt direction indicator that can be rotated relative to the center point of the upper part of the ampoule, and a scale in the form of concentric circles and radial segments that differ the fact that, in order to expand the measurement range due to a change in the price of the scale data, it is equipped with a bubble size adjustment unit and a micrometer node, which is set to an inserted bracket rigidly connected to the lower part of the ampoule with the ability to interact with the center point of the upper part of the ampoule made of semi-soft material, the lower part of the ampoule is made with two openings, and the bubble size adjustment unit is made in the form of a plug installed in one hole, and a hollow air chamber with a valve connected to another opening.  -1P 6-6 Phie, 3