RU1772513C - Device for filling tanks with liquid cryogenic agents - Google Patents

Abstract

Use of the invention: in a cryogenic technique to reduce the loss of liquid cryoagent associated with thermally induced vibrations arising in transfusion devices. The inventive thermally induced vibrations are completely eliminated by installing a flexible sealed partition at the interface of the inner channel of the insulated pipe to supply the liquid cryoagent and the annular space formed by the specified pipe and the pipe for controlling the shut-off valve. The sealed partition prevents heat and mass transfer between the liquid cryogen volume in the channel and gaseous in the annular volume and thus the occurrence of thermally induced oscillations. The sealed partition may be in the form of a flexible membrane or bellows attached to an insulated pipe for supplying liquid cryoagent and a pipe for controlling the shutoff valve. 1 s.p. file, 2 ill.

Description

The invention relates to cryogenic technology, in particular to pipelines for transfusion of liquid cryoagents.

The closest technical solution, selected as a prototype, is a device for filling vessels with liquid cryoagents, containing a thermally insulated pipe for supplying liquid cryoagent, mounted coaxially inside the pipe to control the shut-off valve with the formation of an annular space between them, a partition made in the form of a bronze ring, separating the annular space from the inner channel of the pipe for supplying liquid cryoagent, and a shut-off valve,

The disadvantage of this design is that the partition made in the form of a bronze ring does not completely separate the inner channel of the liquid cryoagent supply pipe from the annular space, formed by the coaxially arranged liquid cryoagent supply pipe and the control valve shutoff pipe. that to provide free and unimpeded movement of the pipe for controlling the shutoff valve relative to the pipe for supplying liquid cryoagent, a baffle representing A bronze ring is set with some clearance between it and the pipe to control the shutoff valve. Therefore, such a transition X | VI

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The town does not provide a hermetic separation of the internal channel of the pipe for supplying liquid cryoagent from the annular space between the pipes. As a result, the TEC and the resulting loss of liquid cryoagent are not completely eliminated.

The aim of the invention is to reduce the loss of cryoagent.

This goal is achieved by the fact that in the known design of a device for filling vessels with liquid cryoagents, comprising a thermally insulated cryoagent supply pipe installed coaxially inside the pipe to control the shut-off valve and a baffle separating the annular space from the inner cavity of the feed pipe in front of the shut-off valve, according to the invention, a baffle made in the form of a flexible element, hermetically fixed by the edges on both pipes. In addition, the achievement of the goal contributes to the implementation of the flexible element in the form of a membrane or bellows.

It is known that the cause of TECs in the annular space is the mass transfer at the boundary of the internal channel of the pipe to supply the liquid cryoagent and the annular space. The flow of a liquid cryoagent causes vortices at the boundary, falling into the annular space, resulting in TECs. It was experimentally established that in unevenly heated pipelines with tightly closed cold ends, TECs do not occur. Thus, a baffle in the form of a flexible element sealed to the tubes completely prevents the occurrence of TECs in the device for filling vessels with liquid cryoagents and eliminates the loss of cryoagent associated with TECs.

In FIG. 1 shows a section of a device with a flexible element made in the form of a membrane; in FIG. 2 is a sectional view of a device with a flexible element made in the form of a bellows.

The device for filling vessels with a liquid cryoagent contains a thermally insulated pipe 1 for supplying a liquid cryoagent, which is located coaxially inside the pipe 2 for controlling the shut-off valve

3. In this case, pipes 1 and 2 form the annular space 4. A flexible element 5, made in the form of a membrane (Fig. 1) or a bellows (Fig. 2), hermetically separates the annular space 4 from the inner cavity of the pipe 1. The adapter ring 6 ( Fig. 2) is used to seal the bellows with the pipe 2.

Vessel filling device

liquid cryoagents works as follows.

Using the pipe 2 to control the shut-off valve 3, the latter moves down and opens the internal cavity

thermally insulated pipe 1 supply of liquid cryoagent. The liquid cryoagent through the internal cavity of the pipe 1 through the holes in the shutoff valve 3 will enter the filled vessel. At the same time, the flexible element

5 will not prevent the opening and closing of the internal cavity of the shutoff valve, but at the same time it will hermetically separate the annulus 4 formed by the pipes 1 and 2, which will allow

prevent the occurrence of TECs and reduce the loss of liquid cryoagent when filling vessels with liquid cryoagents. After filling the vessel using the pipe 2, the shut-off valve 3 moves up and

overlaps the internal cavity of the pipe 1. The use of the proposed technical solution in comparison with the prototype allows to completely eliminate the loss of liquid cryoagent associated with TEC when filling vessels and cryostats.

Claims (2)

SUMMARY OF THE INVENTION 1. A device for filling vessels with liquid cryoagents containing a thermally insulated cryoagent supply pipe mounted coaxially inside the pipe to control the shut-off valve and a baffle separating the annular space from the inner cavity of the supply pipe before shut-off valve, characterized in that, in order to reduce the loss of cryoagent, the partition is made in the form of a flexible element, hermetically fixed by the edges on both pipes. 2. The device according to claim 1, with the exception that the flexible element is made in the form of a membrane or a bellows. Figure 1 FIG. 2