CN213686214U

CN213686214U - Flat-opening normal-pressure container with double-layer cold screen vacuum heat insulation structure

Info

Publication number: CN213686214U
Application number: CN202022413732.7U
Authority: CN
Inventors: 李央; 郭凯欣; 张南国; 刘焕杰; 郭涛; 李静
Original assignee: Aerosun Corp
Current assignee: Aerosun Corp
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-07-13
Anticipated expiration: 2030-10-26

Abstract

The utility model relates to a flat-nose ordinary pressure container with double-deck cold shield vacuum insulation structure belongs to cryogenic liquids storage container technical field. The upper port of the inner cylinder body of the container is fixedly connected with the upper end of an inner cold screen sleeved outside the inner cylinder body through an annular upper sealing plate, and the lower end of the inner cold screen is fixedly connected with the lower end of an outer cold screen through an annular lower sealing plate; the upper end of the outer cold shield is higher than the upper end of the inner cold shield and is fixedly connected with the epitaxial flange ring; the outer side of the upper end of the inner cold shield is fixedly connected with the inner wall of the outer cold shield through a heat insulation ring, and a flat cover with a filled heat insulation layer on the inner surface is covered on the flange ring; the shell is fixedly connected below the flange ring, and vacuum is formed between the shell and the inner cylinder body. Because the gaseous sandwich structure that double-deck cold screen formed has thermal-insulated effect, and has sufficient intensity, the utility model discloses an inside and outside double-deck cold screen and interior barrel and the vacuum between the shell have constituted the thermal-insulated structure of organic combination, have not only increased the thermal resistance, can show the speed that reduces external heat transfer and go into in the container, have strengthened intensity moreover.

Description

Flat-opening normal-pressure container with double-layer cold screen vacuum heat insulation structure

Technical Field

The utility model relates to a flat-mouth ordinary pressure container, more specifically relate to a flat-mouth ordinary pressure container with double-deck cold shield vacuum insulation structure belongs to cryogenic liquids storage container technical field.

Background

The vacuum heat-insulating flat-opening normal-pressure container is used for storing low-temperature liquid, working media of the vacuum heat-insulating flat-opening normal-pressure container are generally liquid nitrogen, liquid oxygen, liquid argon and liquid carbon dioxide, an inner container of the vacuum heat-insulating flat-opening normal-pressure container is made of austenitic stainless steel, a shell material is selected from Q235-B, Q245R or 345R according to national regulations according to land, an interlayer of an inner container and an outer container is filled with a heat-insulating material and is vacuumized, and the heat-insulating effect of the conventional containers is further improved because the conventional.

Disclosure of Invention

The utility model aims to provide a: the flat normal pressure container with double-layer cold screen vacuum heat insulation structure has reasonable structure, feasible process and further obviously improved heat insulation effect, and the manufacturing method thereof is provided.

In order to achieve the above purpose, the basic technical scheme of the flat-mouth normal pressure container with the double-layer cold shield vacuum heat insulation structure is as follows:

the inner cylinder body is provided with a liquid feeding pipe orifice at the bottom, the upper port of the inner cylinder body is fixedly connected with the upper end of an inner cold screen sleeved outside the inner cylinder body through an annular upper sealing plate, and the lower end of the inner cold screen is fixedly connected with the lower end of an outer cold screen through an annular lower sealing plate; the upper end of the outer cold shield is higher than the upper end of the inner cold shield and is fixedly connected with the epitaxial flange ring; the outer side of the upper end of the inner cold shield is fixedly connected with the inner wall of the outer cold shield through a heat insulation ring, and a flat cover with a heat insulation layer filled in the inner surface is covered on the flange ring; and the lower part of the flange ring is fixedly connected with the shell, and a vacuum is formed between the shell and the inner cylinder body.

Because the gaseous sandwich structure that double-deck cold screen formed has thermal-insulated effect, and has sufficient intensity, consequently the utility model discloses a vacuum between inside and outside double-deck cold screen and interior barrel and the shell has constituted the thermal-insulated structure of organic combination, has not only increased the thermal resistance, can show the speed that reduces external heat transfer and get into in the container, has strengthened intensity moreover.

The utility model discloses a further perfection is, the bottom of interior barrel is the spherical crown shape, and the outer wall cladding has the heat insulation layer.

A further improvement of the present invention is that the outer wall of the outer cold shield is coated with a heat insulating layer.

The utility model discloses it is still further perfect, go up the shrouding and be the U-shaped with the opening up down of cross-section opening respectively with lower shrouding. This facilitates butt welding with the cold shield port.

The utility model discloses further perfection is again, the chimb that the flange circle extends down through the border docks with shell upper end limit. This facilitates butt welding with the housing.

The utility model discloses still further perfection is, flange ring upper surface middle part forms the sunken that matches with the arch of flat lid lower surface, protruding and sunken between be equipped with sealed the pad.

The utility model discloses a flat-end ordinary pressure container manufacturing approach with double-deck cold shield vacuum insulation structure as follows:

firstly, manufacturing an inner cylinder body, namely welding a cylindrical cylinder body and a spherical crown-shaped bottom end socket with a liquid feeding pipe orifice into the inner cylinder body;

secondly, manufacturing double cold shields, namely sleeving an outer cold shield outside the inner cold shield, welding and fixing the lower ends of the inner cold shield and the outer cold shield through a lower sealing plate, and welding an upper sealing plate at the upper end of the inner cold shield;

thirdly, combining the cylinder screens, namely sleeving the double cold screens fixedly connected with the inside and the outside the inner cylinder body, and welding the upper port of the inner cylinder body through an upper seal plate;

fourthly, flange welding, namely welding a flange ring outside the upper end of the outer cold shield;

fifthly, coating a heat insulating layer, namely coating the heat insulating layer on the outer wall of the inner cylinder and the outer wall of the outer cold shield;

sixthly, welding a shell, namely covering the shell outside the outer cold shield, welding an upper port of the shell with a convex edge extending downwards of the flange ring, leading out a liquid feeding pipeline and a vacuumizing port from the bottom of the shell, and vacuumizing between the shell and the inner cylinder;

seventhly, installing a base, namely welding the base at the bottom of the shell;

and eighthly, covering in an isolating way, namely fixing a heat insulation ring between the outer side of the upper end of the inner cold shield and the inner wall of the outer cold shield, placing the sealing gasket in the middle depression of the upper surface of the flange ring, and covering a flat cover with the inner surface filled with a heat insulation layer.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 to 9 are schematic structural diagrams of steps of the manufacturing process of the embodiment of fig. 1.

Detailed Description

Example one

The flat-top normal pressure vessel with double-layer cold shield vacuum heat insulation structure of the embodiment is shown in fig. 1, and the outer wall of an inner cylinder body 1 with a spherical-crown-shaped bottom and a liquid adding pipe orifice 1-1 is coated with an aluminum foil and heat insulation paper composite layer heat insulation layer 1-2.

The upper port of the inner cylinder body 1 is fixedly connected with the upper end of an inner cooling screen 3 sleeved outside the inner cylinder body 1 in a welding way through an annular upper sealing plate 2 with an inverted U-shaped cross section. The lower end of the inner cold screen 1 is fixedly connected with the lower end of the outer cold screen 5 of which the outer wall is coated with a heat insulating layer 5-1 in a welding way through an annular lower sealing plate 4 with a U-shaped section. The upper end of the outer cold shield 5 is higher than the upper end of the inner cold shield 3 and is fixedly connected with the epitaxial flange ring 6 in a welding mode. The inner and outer cold shields are made of stainless steel.

The outer side of the upper end of the inner cold shield 3 is fixedly connected with the inner wall of the outer cold shield 5 through a glass fiber reinforced plastic heat insulation ring 10. The flange ring 6 is butt-welded with the upper end edge of the shell 7 through a convex edge 6-1 extending downwards on the periphery. Vacuum is pumped between the outer shell 7 and the inner cylinder 1 to form a vacuum layer. The bottom of the housing 7 is supported on a chassis 12.

The middle part of the upper surface of the flange ring 6 is provided with a dent 6-2 matched with the bulge 8-1 of the lower surface of the flat cover 8, a sealing gasket 9 is arranged between the bulge 8-1 and the dent 6-2, and the flat cover 8 is tightly fixed with the flange ring 6 through a peripheral fastening piece. The inner surface of the flat cover 8 is provided with a foaming heat-insulating layer 8-2 which is filled.

The process for manufacturing the flat-top atmospheric pressure vessel of this example is as follows:

firstly, manufacturing an inner cylinder body, namely welding a cylindrical cylinder body and a spherical crown-shaped bottom end socket with a liquid feeding pipe orifice 1-1 into the inner cylinder body 1 as shown in figure 2.

And secondly, manufacturing the double cold shields, namely sleeving an outer cold shield 5 outside the inner cold shield 3 as shown in figure 3, welding and fixing the lower ends of the inner and outer cold shields through a lower sealing plate 4 with a U-shaped cross section, and welding an upper sealing plate 2 with an inverted U-shaped cross section at the upper end of the inner cold shield 3.

And thirdly, combining the tube screens, namely sleeving the double

cold screens

3 and 5 which are fixedly welded inside and outside the inner tube body 1 as shown in figure 4, and welding the upper port of the inner tube body 1 through the upper seal plate 2.

Fourthly, flange welding, as shown in figure 5, a flange ring 6 is welded outside the upper end of the outer cold shield 5.

And fifthly, coating heat insulation layers, namely as shown in figure 6, respectively coating heat insulation layers 1-2 and 5-1 on the outer wall of the inner cylinder body 1 and the outer wall of the outer cold screen 5.

Sixthly, installing and welding the shell, namely as shown in figure 7, covering the shell 7 outside the outer cold shield 5, welding the upper port of the shell with the flange 6-1 extending downwards, leading out a liquid feeding pipeline A and a vacuum pumping port B from the bottom of the shell, and vacuumizing between the shell 7 and the inner cylinder 1.

Seventhly, additionally installing a base, namely welding an additional base 12 at the bottom of the shell 7 as shown in figure 8;

and eighthly, covering for isolation, namely fixing a glass fiber reinforced plastic heat insulation ring 10 between the outer side of the upper end of the inner cold shield 3 and the inner wall of the outer cold shield 5 as shown in figure 9, placing a sealing gasket 9 in a concave part in the middle of the upper surface of the flange ring 6, and covering a flat cover 8 with a foaming heat insulation layer 8-2 filled on the inner surface.

Tests prove that the flat-opening normal-pressure container with the double-layer cold screen vacuum heat insulation structure is physically isolated by the double-layer cold screen and the glass fiber reinforced plastic heat insulation block to form a heat insulation air screen in a vacuum area, and the space of the vacuum area between the shell and the inner cylinder body is reasonably utilized to form a plurality of heat insulation barriers by the double-heat insulation layer structure, so that the radiation heat transfer between the inner cylinder body and the shell can be effectively reduced, and the heat insulation effect is effectively improved; and the gasification amount of liquid in the container is reduced, the temperature difference between the inner wall and the outer wall of the tank body is reduced, and the temperature difference stress generated by the temperature difference stress is reduced. In addition, the process of the embodiment properly solves the manufacturing problem and is feasible.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. The utility model provides a plain end ordinary pressure container with double-deck cold shield vacuum insulation structure, includes that the bottom has the orificial interior barrel of liquid feeding, its characterized in that: the upper port of the inner cylinder is fixedly connected with the upper end of an inner cold screen sleeved outside the inner cylinder through an annular upper sealing plate, and the lower end of the inner cold screen is fixedly connected with the lower end of an outer cold screen through an annular lower sealing plate; the upper end of the outer cold shield is higher than the upper end of the inner cold shield and is fixedly connected with the epitaxial flange ring; the outer side of the upper end of the inner cold shield is fixedly connected with the inner wall of the outer cold shield through a heat insulation ring, and a flat cover with a heat insulation layer filled in the inner surface is covered on the flange ring; and the lower part of the flange ring is fixedly connected with the shell, and a vacuum is formed between the shell and the inner cylinder body.

2. The flat-top atmospheric pressure vessel having a double-deck cold shield vacuum insulation structure according to claim 1, wherein: the upper sealing plate and the lower sealing plate are respectively in a U shape with a downward opening and an upward opening in the cross section.

3. The flat-top atmospheric pressure vessel having a double-deck cold-shield vacuum insulation structure according to claim 2, wherein: the flange ring is butted with the upper end edge of the shell through a convex edge extending downwards on the periphery.

4. The flat-top atmospheric pressure vessel having a double-deck cold shield vacuum insulation structure according to claim 3, wherein: and a recess matched with the protrusion on the lower surface of the flat cover is formed in the middle of the upper surface of the flange ring, and a sealing gasket is arranged between the protrusion and the recess.

5. The flat-top atmospheric pressure vessel having a double-deck cold shield vacuum insulation structure according to claim 4, wherein: the bottom of the inner cylinder body is in a spherical crown shape, and the outer wall of the inner cylinder body is coated with a heat insulating layer.

6. The flat-top atmospheric pressure vessel having a double-deck cold shield vacuum insulation structure according to claim 5, wherein: the outer wall of the outer cold shield is coated with a heat insulating layer.