SU79205A1 - Frostman - Google Patents

Description

The subject matter of the invention is an mslfotograf, which allows continuous recording of the depth of soil freezing.

Such devices are known, cna6 / Kebii (a closed pressure transmission system by Bourdon boxes, an environmental temperature compensator, and a recorder.

The proposed permafrost differs from the known devices in that in order to record the depth of soil freezing, a rubber tube is inserted into the RT-11 differential liquid thermo cartridge and the rubber tube is hermetically sealed and the water filled. The water freezing in the tube causes pressure to increase in the thermostat that is transmitted to the manometric thermometer. - a device that triggers a self-descent.

The drawing shows a permafrost.

Metallic tubes A and B, which are blue between themselves but forming, are filled with antifreeze liquid, dug into the ground and, being closed at both ends by means of thin copper tubes L and T, communicate with Bourdon's tubes, one stumps of which are fixed to the slat, and the other they have levers a and b, which are free to move to opposite ciopoiu.i lnr of odnnakovyh fluid pressure in metal tubes A and B.

The receiver and frostiness of the soil is a rubber tube K, filled with water, closed at both ends and lowered into the middle of the metal tube B. You can choose the volumes of metal tubes A and B and the cutter tube so that the medium temperature changes by 1 with changes in fluid volumes in both metal tubes A and B will be equal. This will obviously be the case if:

v, r, vj; -.- v, a.,: v, p:;,

where Vi is the liquid expansion volume in the metal tube A;

No. 79205-2 -

1 is the volume expansion coefficient of the antifreeze;

V2 is the volume of non-freezing liquid in the metal tube B; UZ - the volume of the rubber tube; J3, is the coefficient of volumetric rubber expansion; V4 - the volume of water enclosed in the carnage tube; Рз - coefficient of volumetric expansion of water. With this subset of volumes and coefficients of volumetric expansion of liquids, the temperature fluctuations of soil and air will not affect the readings of the device or they will be reduced to an insignificant amount, as can be seen from the kinematics of the device. Let nonfreezing liquid in metal tubes A and B be equal to iodine with the same pressure, then the pressure in Burdon tubes Ai and B will also be the same.

If the pressure rises due to raising the temperature of the liquids, then the Burdon tubes should be drawn to the opposite sides by the same angular value, which should lead to the rotation of the a-o-b rocker arm, hinged to the levers a and b, around the point o in which Harnessed and gapped R ha, connected to the opposite end of the arrow-pen of Cribor, ”|” blind on the stand S. Since the point is not moving, the device's arrow remains unfixed.

However, it is enough to freeze a small column of water in the rubber tube, as the pressure due to water spillage during freezing sharply changes even in the metal tube B and does not hurt the tube B, which, straightening with the lever B, will lift the balance arm a-o-b upward and through the arms P lowers the feather and the rib.

Since the liquid in the metal tube A does not freeze, the pressure here will also vary slightly. therefore, the arm of the tube AI will remain in the same position. Engage in the vibrations and frostiness of the soil produced on a drum, rotated by a clockwork.

Subject invention

Permafrost for automatic recording of the depth of soil freezing, characterized in that a liquid tube filled with water and immersed together with the thermocallon c is inserted into the liquid thermonatron of the thermograph of the PT-P type. soil to the depth of the expected freezing.

No. 79205