SU1582018A1 - Device for determining level of cryogenic liquid in vessel - Google Patents

Abstract

This invention relates to cryogenic level gauges for measuring the level of cryogenic liquids in vessels. The purpose of the invention is to improve the accuracy of measuring the level of cryogenic fluid in the Dewar vessel. The level gauge is located in the Dewar vessel 1 with cryogenic liquid 2 and consists of measuring rods 3 and 4 of low-conductive materials of fluoroplastic and fiber-reinforced fiber, the coefficients of volume expansion of which differ not less than 10 times, while the lower ends of the rods are rigidly connected by a clamp 5, and at one upper end of the rod, a guide bar 6 is rigidly fixed with a groove for the passage of the second upper end of the rod and a stand 7 is fixed, on which a level indicator 8 and a time relay 9 with a stopper 10 are located, measuring leg 11 indicator and interacts with the second end of the rod. After the rods 3, 4 are immersed in the cryogenic liquid 2 and the rods are cooled to the liquid temperature, the stopper 10 of the preset time relay is activated. The indicator 8 at the same time shows the level of the liquid in the vessel 1 by the difference of the relative movement of the upper ends of the rods, measured by the leg 11. 1 sludge.

Description

The invention relates to a technique for determining the level of cryogenic liquids when conducting operational firing.

The purpose of the invention is to increase the point quality.

The drawing shows a diagram of a device for determining the level of a cryogenic liquid in a vessel.

The device comprises a vessel 1, a cryogenic liquid 2, a rod (Fluoroplast) 3, a rod (in block) 4, a clamp 6, a guide bar 6, a rack 7, an indicator 8, a time relay 9, a stopper 10 and a leg 11 of a dial indicator.

In vessel 1 with cryogenic liquid 2, the first rod 3 on the fluoroplastic and the second rod ft of fibrous are arranged in sections in the form of a brand to increase the stiffness of the rods .. The lower ends of the rods immersed in the cryogenic liquid are rigidly interconnected by means of a clamp 5 A guide bar 6 is rigidly fixed on the first rod with a groove for free passage of the second rod therein. On the second rod above the bar, a stand 7 is rigidly fixed, on which indicator 8 is located, for example, an indicator clock, and a time relay 9 with a stopper 10. The indicator measuring leg 11 interacts with the second upper end of the first fluoroplastic rod and passes through the stopper 10 window.

Before taking measurements, the device for determining is calibrated, and the time relay 9 is adjusted at a time sufficient to cool the rods to liquid temperature,

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d in the vessel. The time is determined by calculation or by calibrating the level gauge in a cryogenic fluid.

The device for determining the level works as follows.

In order to measure the level of liquid 2 in vessel 1, the rods 3 and 4 are dipped into the vessel up to the stop by means of the latch 5 into the bottom of the vessel. Simultaneously, a time relay 9 is started. The submerged parts of the rods are cooled to the temperature of the cryogenic liquid (a time relay is set at this time). During this time, the parts of the rods located above the liquid are cooled slightly, since the heat transfer coefficients from the gas phase to the rods are significantly lower than from the liquid, and the heat transfer from the cold sections of the rods to the hot sections is also insignificant due to the fact that the rods are made of low heat conductive materials. As a result of the cooling of the parts immersed in the liquid, the lengths of the rods change by a different amount, since the materials of the rods are chosen with coefficients of volume expansion, different: not less than 10 times. This difference is greater, the greater part of the rods in contact with the liquid, i.e. the higher the fluid level in the vessel is 1. The difference in the lengths of the rods leads to a relative movement of their free ends, which is transmitted to the indicator 8 through its leg 1 1. At a predetermined time, the time relay 9 is activated, which controls the stopper 10. The stopper 10 presses the leg 11, preventing its further movement. On a scale of a dial gauge, polo515820186 is determined.

fluid boundary, i.e. its uro-time relay, stopper and indicator cha, wen in a receptacle-type vessel with a movable leg, with

Claims (1)

This thermo-sensitive element is the Formula of the Invention, a fuller dilatometric, consisting of two rods differing in The device for determining the level of thermophysical properties, the first cryogenic fluid in the vessel, the contents of which are rigidly connected between the second is associated with an indicator-less device, which is a clock-type toroid, with a stopper that is so that, in order to mechanically interface with the time relay increase accuracy, it introduced the mobile leg.