SU1283491A2 - Method of filling interwall space of heat-insulating vessels with powder heat insulation material - Google Patents

Abstract

The invention relates to methods for filling the interwall wall of the heat insulating vessels with powder insulation and solves the problem of increasing productivity. Through a tube connected from above to the interwall cavity, powder is poured into the cavity in portions, previously a vacuum and powder, and a cavity after each filling. The powder fills a portion of the interstitial cavity and partially remains in the tube. In order to blow it off into the interstitial cavity, the tube is connected to the atmosphere, and the upper loose unconsolidated layer of powder is dropped into the upper part of the tube due to the pressure difference between the tube and the interwall cavity along the channel, connecting the interwall space and the feeder to the reservoir. 1 il. with

Description

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The invention relates to methods for manufacturing vessels with vacuum-powder thermal insulation, may be used to fill the interstitial cavity of Dewar vessels, thermoses and other vessels, and is in addition to the main author. No. 1164505.

The aim of the invention is to increase productivity.

The drawing shows the installation for the implementation of the proposed method

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The installation contains

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sealed bunker-feeder 1, which is the upper part of tube 2, valve 3, crosspiece 4, elastic coupling 5 into which the vacuum tube 2 is inserted, the thermal insulation of the vessel and its interwall wall 7 are inserted into the bottom of the casing 6 Valves 8 and 9 are connected to the crosspiece 4, connecting it respectively to the atmosphere and a vacuum system containing a filter 10 and a vacuum pump (not shown), a valve 11 is connected to it, which communicates cavity 7 with the bin-reader 1 through pipelines - I water 12.

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The method is carried out as follows.

All valves are closed. In the bunker, the method of filling the interwall cavity of the heat insulating vessels of the feeder 1 creates a residual resolution of the thermal insulation of the auth.

for example, 0.15 kgf / cm. The valve 9 is opened, the vacuum wall of the interstitial cavity 7 is under dilution of the order of 1 kgf / cm. The valve 9 closes and opens the valve 3. The powder fills a part of the interwall cavity 7 and stops, forming a vertical column with a base in the form of a cone on the bottom of the inner vessel, while the pressure

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No. 1164505, characterized in that, in order to increase productivity, after each, except the last, operations of blowing the powder into the interstitial cavity, the non-compacted part of the powder from the interstitial cavity is removed to the upper part of the bunker-feeder due to the pressure difference between them .

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cavity 7 is compared with the pressure in the hopper 1, which is kept constant. Valve 3 is closed. The valve 8 is opened, and the atmospheric air blows away the powder from the cross 4 and the vacuum tube 2 into the cavity 7. The valve 8 is closed. The valve 11 is opened, and the top loose layer of powder together with the air is carried through conduit 12 to the feeder bin 1, settling in its lower part. The valve 11 closes and reopens the valve 9, pumping out the remaining air through the filter 10 with a vacuum pump. The valve 9 is closed and the filling process is repeated. After the last powder has been blown into cavity 7, the filled vessel is replaced. Since most loose powder is returned to the feeder bin, cleaning of the filter housing 10 can be done much less frequently, since much less powder will be squeezed into it, which ultimately improves the plant capacity. The introduction of a new channel allows the use of a vacuum system installation to create a vacuum in the feeder hopper.

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Claims (1)

Invention Formula The method of filling the interstitial cavity of the insulating vessels with thermal insulation of the auth. 0 No. 1164505, characterized in that, in order to increase productivity, after each, except the last, operation of blowing the powder into the interstitial cavity, the non-compacted part of the powder is discharged from the interstitial cavity to the upper part of the supply hopper due to the pressure difference between them.