CN201306600Y

CN201306600Y - Liquid phase pipe structure of cryogenic insulation pressure vessel

Info

Publication number: CN201306600Y
Application number: CNU2008202198233U
Authority: CN
Inventors: 谢志忠
Original assignee: ASTRONAUTIC XINGUANG LOW TEMP VESSELS Manufacturing Co Ltd SHENYANG
Current assignee: ASTRONAUTIC XINGUANG LOW TEMP VESSELS Manufacturing Co Ltd SHENYANG
Priority date: 2008-11-27
Filing date: 2008-11-27
Publication date: 2009-09-09
Anticipated expiration: 2018-11-27

Abstract

The utility model relates to a liquid phase pipe structure of a cryogenic insulation pressure vessel, which is the liquid phase pipe structure optimally selected by various cryogenic insulation pressure vessels. The liquid phase pipe structure is characterized in that a buffering structure which facilitates to form a vapor liquid equilibrium interface is arranged between two ends of a liquid phase pipe. The utility model has the advantages that the volatilization loss of cryogenic liquid is reduced obviously, the storage days of the cryogenic liquid is prolonged, a welding seam at the connecting part between an inner liner and an outer liner can be effectively avoided from cracking, the vacuum degree of a vacuum interlayer can also be avoided from being destroyed and the maintenance cost of the vessel is reduced.

Description

Cryo Heat Insulation pressurized container liquid-phase tube structure

Technical field

The utility model relates to a kind of Cryo Heat Insulation pressurized container, relates in particular to a kind of Cryo Heat Insulation pressurized container liquid-phase tube structure, is the liquid-phase tube structure of various Cryo Heat Insulation pressurized container first-selections.

Background technique

The Cryo Heat Insulation pressurized container is the general name of the equipment of storage and conveying liquified gas, also is the general designation of Dewar type container, low temperature cistern and storage tank.As everyone knows, the temperature of cryogenic liquide is very low, under 101.325Kpa pressure, liquid oxygen-183 ℃, liquid nitrogen-196 ℃, liquid argon-186 ℃, therefore, the necessary heat-insulating property of low-temperature (low temperature) vessel Structural Design Requirement is good, usually adopt the structural type of inside and outside courage combination, interlayer adopts vacuum insulation in the middle of it, interlayer is filled perlite or is adopted coated material to prevent heat conduction, evacuator is installed on the shell, utilize the vacuum unit that the interlayer air is found time, make every effort to handle along with increasing of time will be by convection current with this, the heat that approach such as conduction and radiation pass to cryogenic liquide reduces to alap degree, keeps low temperature system proper functioning, guarantees the purpose of the shelf life of cryogenic liquide.Various pipelines and valve are installed on the shell of tank body,, are used the cryogenic liquide of splendid attire in the container by the switch transporting low temperature liquid of valve.However, people find under study for action, link between the inside and outside courage also has certain influence to conducting heat, particularly the indusion tube between the inside and outside courage of tradition is a straight tube, two ends are welded on respectively on the inside and outside courage, this structure is not owing to cushion, under the cryogenic liquide effect, often cause the situation of weld cracking to happen occasionally, and bigger harm is that also indusion tube can be vaporized in a large number with the extraneous part that directly contacts in the cryogenic liquide course of conveying, vaporization back pressure raises, enter in the container along pipe, the result vaporizes the cryogenic liquide in the container again, this has just quickened inside and outside transmission of heat, not only loss cryogenic liquide, and the storage life of cryogenic liquide had a negative impact.Based on above-mentioned situation,,, be necessary the structure of existing liquid-phase tube is improved to prolong the storage life of cryogenic liquide for reduce transmission of heat as far as possible.

The model utility content

The problem that the utility model exists at prior art, a kind of inside and outside courage joint weld cracking that effectively prevents is provided, layer vacuum avoids destroying, obviously reducing the cryogenic liquid evaporates amount, prolongs the Cryo Heat Insulation pressurized container liquid-phase tube structure that cryogenic liquide is preserved fate and reduced the container maintenance rate.

The utility model is realized by the following technical solutions:

Be provided with between the two ends of this liquid-phase tube and be beneficial to the buffer structure that forms the vapor liquid equilibrium interface.

Described buffer structure is selected from a kind of in bend pipe, bellows and the volute.

The following liquid entering hole e of the cryogenic liquide of described liquid-phase tube is located at the bottom of inner bag.

The inner of described liquid-phase tube is rolled over the bottom that puts in inner bag outward after vertically passing outer courage, vacuum sandwich, extend horizontally to the opposite side of inner bag, outwards bending extends into vacuum sandwich under tiltedly again, the bottom that vertically puts in inner bag through buffer structure again links to each other with following liquid mouth e, and the outer end links to each other with liquid in-out valve V6 by the end of pressurized machine PBV.

The utility model compared with prior art, owing to the structure of liquid-phase tube is extended, moves towards more rationally and set up one between two fixed ends to be beneficial to the buffer structure that forms the gas-liquid phase equilibrium interface outside the tank, have the preservation fate of obvious minimizing cryogenic liquid evaporates loss, prolongation cryogenic liquide simultaneously through evidence; Can also effectively prevent inside and outside courage joint weld cracking, objectively also make the degree of vacuum of vacuum sandwich exempt from destruction, reduce the maintenance expenses of container.

Description of drawings

Fig. 1 is a main TV structure schematic representation of the present utility model.

Fig. 2 is that the utility model is provided with the position schematic representation in low-temperature (low temperature) vessel.

Fig. 3 is the structural representation of traditional liquid-phase tube.

Among the figure: 1. liquid-phase tube, 2. inner bag, 3. gas, 4. gas-liquid interface, 5. outer courage, 6. buffer structure, 7. vacuum sandwich, 8. vacuum pumping device, the last liquid entering hole of a., b. gas phase mouth, the c. level meter is suitable for reading, d. be full of the indication mouth, liquid entering hole under the e., f. level meter end opening, g. drain, V ₁, V ₄. cryogenic globe valve, V ₂, V ₃. level meter is gone up valve, V down ₅. go up the feed liquor valve, V ₆. liquid in-out valve, V ₇. pressure charging valve, P. pressure gauge, S. safety valve, L. level meter, PBV. pressurized machine.

Embodiment

Content of the present utility model is described in detail in conjunction with the accompanying drawings by embodiment.

As shown in Figure 1, 2, make the inner bag 2 of Cryo Heat Insulation pressurized container, fill perlites, the associate member of packing in succession, cryogenic globe valve V in outer courage 5, the middle vacuum sandwich 7 by prior art ₁Link to each other gas phase mouth b, level meter C suitable for reading, respectively by pipe fitting and corresponding stop valve V separately by the indication mouthful d that is full of on pipe fitting and the inner bag 2 ₄, drain g, safety valve S, pressure gauge P, valve V on the level meter ₃, water level gage L, valve V under the level meter ₂F links to each other with the level meter end opening, last feed liquor valve V ₅Link to each other with last liquid entering hole a by pipe fitting; The utility model is put in the Cryo Heat Insulation pressurized container, liquid in-out valve V ₆End by pressurized machine PBV links to each other with the outer end of liquid-phase tube 1, outer courage 5, the vacuum sandwich 7 outer bottoms that put in inner bag 2 of rolling over are vertically passed in the inner of liquid-phase tube 1, the outer bending of opposite side that level extends to inner bag 2 always vertically puts in inner bag 2 after tiltedly putting in vacuum sandwich 7 in by buffer structure 6 down bottom links to each other with following liquid entering hole e, and the other end of pressurized machine PBV passes through pressure charging valve V ₇By cryogenic globe valve V ₄G links to each other with drain, and vacuum pumping device 8 is located on the outer courage 5.

Described buffer structure 6 is selected from a kind of in bend pipe, bellows and the volute.

The operating process of the utility model when filling cryogenic liquide and use cryogenic liquide is same as the prior art, just in the process of filling discharging or transporting low temperature liquid, the cryogenic liquide of the pipeline portions that directly contacts with the external world can be vaporized, " heat " gas after the vaporization, pressure increases the trend that enters in the oriented container, but because the utility model is provided with buffer structure, just formed vapor liquid equilibrium interface 4 in the front of buffer structure soon, effectively stoped the gas 3 of vaporization to enter container, and then the cryogenic liquide in the container is vaporized again, avoid the shortcoming of many losses cryogenic liquide, the final prolongation cryogenic liquide of realizing is preserved fate, reduce the purpose of low-temperature (low temperature) vessel maintenance rate.

Claims

1, Cryo Heat Insulation pressurized container liquid-phase tube structure is characterized in that being provided with between the two ends of this liquid-phase tube and is beneficial to the buffer structure (6) that forms vapor liquid equilibrium interface (4).

2, Cryo Heat Insulation pressurized container liquid-phase tube structure according to claim 1 is characterized in that described buffer structure (6) is selected from a kind of in bend pipe, bellows and the volute.

3, Cryo Heat Insulation pressurized container liquid-phase tube structure according to claim 1 is characterized in that the following liquid entering hole e of the cryogenic liquide of described liquid-phase tube is located at the bottom of inner bag (2).

4, according to each described Cryo Heat Insulation pressurized container liquid-phase tube structure among the claim 1-3, outer courage (5), the outer bottom that puts in inner bag (2) of rolling over, vacuum sandwich (7) back are vertically passed in the inner that it is characterized in that described liquid-phase tube, extend horizontally to the opposite side of inner bag (2), outwards bending extends into vacuum sandwich (7) under tiltedly again, the bottom that vertically puts in inner bag (2) through buffer structure (6) again links to each other with following liquid entering hole e, and the outer end links to each other with liquid in-out valve V6 by the end of pressurized machine PBV.