SU1453261A1 - Apparatus for testing specimens for water-gas proofness - Google Patents

Abstract

The invention relates primarily to measurement technology, is intended to determine the water and gas impermeability of building materials, and is used in particular. to determine the grade of concrete by water and gas tightness under high pressure. The purpose of the invention is to improve the accuracy of measuring water and gas tightness under pressure, as well as to improve the operational qualities of the device. In a water-gastight testing device, the lower side surface of the cylindrical body is separated from the upper part by a rigidly mounted magnetic circuit. It is located in the housing at an angle of 10 to 80 and placed outside the surface of the housing at an angle of 90, constituting a whole with the housing. The bottom face of the bottom of the case has a groove in which an annular permanent magnet is installed, connected by means of pole pieces to a magnetic conductor. I il. about ate with

Description

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The invention relates to a measuring technique and is intended to determine the water and gas impermeability of building materials and structures under high pressure.

The purpose of the invention is to improve the accuracy of measuring water and gas impermeability under elevated pressure, as well as to improve the performance of the device.

The drawing shows devices for testing samples for water and gas penetration with the test method installed therein.

The device for testing samples for water and gas impermeability consists of a hollow cylindrical body 1, in the socket of which I place test sample 2, an elastic cuff 3 of a turn type, placed

in the annular cavity-4, sealer I, - ,,

nyy ledge 5, covers o. At the top

The end surface of sample 2 is equipped with a primary transducer 7 of a humidity sensor for directly determining the water tightness during the tests. The primary sensor transducer 7 is connected via a cable 8 to a measuring device (not shown), while the primary converter 7 is placed in the lid groove 9 and mounted on a rubber compensator 10. The lower side surface of the cylindrical body 1 is separated from the upper part by a magnetic core 11 fixedly fixed in the housing and located in the latter at an angle in the range of 10

80, and extending beyond the casing at an angle of 90, and constituting with the casing 1, a single unit, the magnetic conductor comprising a support ring 12, on which mounting holes 13 are made to be fixed on the surface of the test installation. In the bottom 14 of the housing, in the end part, a recess 15 and an annular protrusion 16 are made. On the inner surface of the bottom 4 there are special drain holes 17 interconnected with a storage groove 18. A pressure nozzle is provided for supplying water (gas) to sample 2. nineteen. The lower part of the gap between the housing 1 and the sample 2 (through the magnetic circuit 11) is filled with a ferromagnetic sealing fluid separator 20, after which the gap is poured to the top

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high molecular nonwetting

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liquid 21.

Siloxane liquid with a high density (kg / m at) is used as a high molecular nonwetting liquid. Crimping a test specimen, it fills all irregularities and roughness, thus achieving complete sealing of the specimen, and the siloxane fluid is on the ferromagnetic liquid separator with a decompression effect without mixing with the latter, and is designed for repeated use, at the bottom of the body a drain hole is provided. The housing of the device, with the exception of the magnetic circuit, is made of non-magnetic materials.

A device for testing water and gas impermeability works as follows. .

The test sample 2 is placed in the socket of the housing 1, placing it on the annular protrusion 16 of the housing 1 with a low plane. The recess 15 under the test sample 2 and the annular gap formed by the inner surface of the housing and the lateral surface of the sample 2 are filled with a ferromagnetic sealing fluid 20 the magnetic circuit II), which is held in the gap by the created magnetic flux F between the magnetic core 11 and the ring magnet 22, which reliably seals the test sample 2, then into the annular gap Top-up, low molecular weight, non-wetting liquid 21, such as a siloxane liquid, is poured to the top.

After filling the internal gap, with a high-molecular non-wetting fluid 21, its elastic surface in the annular cavity 4 imposes an elastic collar-type cuff 3, and then a primary transducer 7 of the humidity sensor interconnected with the measuring device by means of cable 8 is installed on the upper end surface of the sample 2. .

Next, using the lug 6 through the rubber compensator 10, placed in the groove 9 of the rim, the primary transducer 7 and the sample 2 are fixed in the desired position, while the sealing protrusion 5

the cover 6 presses the rubber cuff 3 to the inner face of the bell of the housing 1 and the edge of the upper end of sample 2, at the same time creating pressure by the supporting end of the rubber macets 3 on high-molecular non-wetting liquid 21, and through it on sealing ferromagnetic separator 20 placed in the annular gap .

The device with the specimen 2 fixed and sealed in it is attached through holes

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magnetic internal lines of length 1 and external lines of force passing through the magnetic conductor I, the pole tip 23 to the ring magnet 22, length E, When sealing the sample, it is necessary to ensure the condition of maximum passage of magnetic flux inside the housing 1 d around the test sample 2, i.e. . so that the magnetic conductor 11 and the pole tips 23 close the minimum magnetic flux.

This condition is reached if

13 to the test facility for op. the length of the magnetic field lines to express watertightness is fraso-inequality 1.7 1. Therefore, for

reducing the length of the internal cellular lines 1 of the magnetic flux F, the magnetic conductor I1 is rigidly fixed on the housing 1 and placed in the last

impermeability of 9 samples; in this case, the direction of supply of water or gas under pressure to the sample in the device corresponds to arrow P (Fig. 1). The device provides for the possibility of draining high-molecular non-wetting fluid 21 after completion of the test of sample 2 for water-tightness.

This feature is implemented as follows.

When the tests are completed and the supply of water or gas under pressure in the device is stopped, sample 2 is removed from the bell of housing I, while sealing ferromagnetic liquid separator 20 under the action of a magnetic flux f takes the shape of a repeating circuit of magnetic force lines in the zone maximum passage of the magnetic flux, thus forming an annular arc, starting along the contour of the inner surface of the magnetic circuit 11, rigidly attached to the wall of the housing 1, and closing on the inner surface of the bottom 14, The high molecular weight, nonwetting liquid 21, under the influence of gravity, begins to flow down the arc contour and into the accumulation groove 18, and from there through the openings 17 it re-turns from the housing. After which the device is ready to repeat the test from the housing. After that, the device is ready to repeat the test of the sample for water and gas-tightness at high pressures.

Placing the magnit duct 11 in the lower part of the housing at an angle in the range of 10 -80 ° is due to the fact that between the magnetic core 1-1 and the annular permanent magnet 22 arise

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at an angle in the range of 10-80 °, since the remaining angles will not give the desired effect for reducing E-,. In this case, the main magnetic flux 4 through the power lines m 1 passes through the sealing ferromagnetic fluid separator 20, which, under the influence of the magnetic field intensity gradient, fills the 30 part of the gap formed by the inner wall of the housing 1, the recess 15 in the bottom 14 and the side surface of the test specimen 2, which ensures reliable fixing and sealing of the specimen in the housing.

Claims (1)

Invention Formula A device for testing samples on WATER-gas tightness, containing a vertical hollow cylindrical body with a socket for placing a sample and a cavity for liquid-sealant 45, a cover and an elastic cuff for fixing the sample, characterized in that, in order to improve measurement accuracy at elevated pressures x, and gQ also improve performance, the lower part of the side surface of the cylindrical body is separated from the top by a rigidly fixed magnetic core, which makes up the body gg, Attached enclosure at an angle in the U-ZO range and extended beyond the enclosure at an angle of 90® to its side. surfaces, and in the front face part 35 40 45326 4 magnetic internal lines of length 1 and external lines of force passing through the magnetic conductor I, the pole tip 23 to the ring magnet 22, length E, When sealing the sample, it is necessary to ensure the condition of maximum passage of magnetic flux inside the housing 1 d around the test sample 2, i.e. . so that the magnetic conductor 11 and the pole tips 23 close the minimum magnetic flux. This condition is reached if , the length of the magnetic field lines is expressed by the inequality 1.7 1. Therefore, for reducing the length of the internal cellular lines 1 of the magnetic flux F, the magnetic conductor I1 is rigidly fixed on the housing 1 and placed in the last 20 25 at an angle in the range of 10-80 °, since the remaining angles will not give the desired effect for reducing E-,. In this case, the main magnetic flux 4 through the power lines m 1 passes through the sealing ferromagnetic fluid separator 20, which, under the influence of the magnetic field intensity gradient, fills the 30 part of the gap formed by the inner wall of the housing 1, the recess 15 in the bottom 14 and the side surface of the test specimen 2, which ensures reliable fixing and sealing of the specimen in the housing. Invention Formula A device for testing samples on WATER-gas tightness containing a vertical hollow cylindrical body with a socket for placing a sample and a cavity for fluid-sealant 5, a cover and an elastic cuff for fixing the sample, characterized in that, in order to improve measurement accuracy at elevated pressures x, and Q also improve performance, the lower part of the lateral surface of the cylindrical body is separated from the upper part by a rigidly fixed magnetic conductor constituting with the body g o B lozhennm body at an angle in the range of U-ZO and derived outside the hull at an angle 90® to his side. surfaces, and in the front face 5 0 514532616 These bottoms of the body are grooved, along the contour of its inner wall in which an annular ring is installed, a recess is made to fill the magnetic magnet connected by ferromagnetic liquid-separating pole nakochnik with a magnetic conductor, and The liquid sealant uses a siloxane fluid. Lem, and siloxane fluid is used in the liquid sealant. 20 P 72 15 f, tf 1 u