CN202171125U

CN202171125U - Cryogenic storage tank for reducing internal stress

Info

Publication number: CN202171125U
Application number: CN2011202682079U
Authority: CN
Inventors: 丛庆建; 邢月; 谢志远
Original assignee: TIANJIN BAOYUE STEEL CO Ltd
Current assignee: TIANJIN BAOYUE STEEL CO Ltd
Priority date: 2011-07-27
Filing date: 2011-07-27
Publication date: 2012-03-21
Anticipated expiration: 2021-07-27

Abstract

The utility model discloses a cryogenic storage tank for reducing internal stress. The cryogenic storage tank comprises an outer cylinder and an inner cylinder. At least three sets of lacing bars are uniformly arranged in a jacket between the outer cylinder and the inner cylinder along the circumferential direction of the inner cylinder. Each set of lacing bar comprises a first lacing bar and a second lacing bar which are symmetrical vertically. The ratio of the length of the first lacing bar to the length of the second lacing bar to the length of a connection part of two lacing bars in each set and the outer cylinder in the axial direction of the inner cylinder is 1:1 :(1.5-2.5). According to the cryogenic storage tank disclosed by the utility model, after the cryogenic storage tank is processed, when being used, the stress of the lacing bars and the connection part of the lacing bars, the inner cylinder and the outer cylinder can be increased because of the size change resulted from reduced temperature of the inner cylinder; tests show that the stress distribution of the lacing bar connection part can be more rational only in the length relationship range of the utility model; the application of the cryogenic storage tank can be ensured; and potential safety hazards can be eliminated.

Description

A kind of deep cooling storage tank that reduces internal stress

Technical field

The utility model relates to a kind of liquid-container, relates in particular to a kind of storage tank that is used to hold cryogenic liquid.

Background technique

The deep cooling storage tank is the deep cooling container that is used to deposit products such as LNG Liquefied natural gas, liquid oxygen, liquid nitrogen, liquid argon.The deep cooling storage tank generally is made up of urceolus and inner core, and the chuck between urceolus and the inner core is filled with thermoinsulation material, in order to keep the stable of intensity and inner core; Be provided with some lacing wires between urceolus and the inner core, inner core by the straight tube that is in the middle part, the upper and lower end socket that is used to seal straight tube both ends open constitutes, in order to reduce the stress concentration phenomenon; Every group of lacing wire is divided into two up and down, arranges at least three groups uniformly around the inner core circumferencial direction, in every group of lacing wire; Last lacing wire is symmetrically distributed with following lacing wire; Above lacing wire is an example, and an end is connected with the upper cover outer wall, and the other end is connected the inwall of urceolus; And last lacing wire is drawn close with the termination that following lacing wire is connected with urceolus each other, generally all is connected the middle part (middle part in axial direction) of the inwall of urceolus.

Can reduce the concentrated situation of stress although go up the distribution form of lacing wire and following lacing wire in the existing technology; But the connection part of last lacing wire and following lacing wire and outer tube inner wall still needs further to optimize; Otherwise can cause stress to concentrate at the outer tube inner wall place, long-term use can cause local fatigue even damage.

The model utility content

The utility model provides a kind of deep cooling storage tank, through to the improvement of last lacing wire with the connection part of following lacing wire and urceolus and inner core, has optimized the distribution of stress.

A kind of deep cooling storage tank that reduces internal stress; Comprise urceolus and inner core; Arrange at least three group lacing wires uniformly around the inner core circumferencial direction in the chuck between urceolus and the inner core; Every group of lacing wire comprises laterally zygomorphic first lacing wire and second lacing wire, on the axial direction of described inner core, and the length of first lacing wire: the length of second lacing wire: every group two lacing wires and length=1: 1: 1.5～2.5 between the urceolus connection part.

As preferably, on the axial direction of described inner core, the length of first lacing wire: the length of second lacing wire: every group two lacing wires and length=1: 1: 1.6～2.2 between the urceolus connection part.

Described inner core by the straight tube that is in the middle part, the upper and lower end socket that is used to seal straight tube both ends open constitutes, described first lacing wire, one end is connected the upper cover outer wall, the other end is connected outer tube inner wall.

Described second lacing wire, one end is connected the lower seal head outer wall, and the other end is connected outer tube inner wall.

In two lacing wires of every group; With the connection part of urceolus with respect to drawing close each other with the connection part of inner core; Promptly first lacing wire, one end is connected the upper cover outer wall; The other end extends until outer tube inner wall below tiltedly, and second lacing wire, one end is connected the lower seal head outer wall, and the other end extends until outer tube inner wall along oblique upper.

The length of two lacing wires in every group (in the projected length on the inner core axis) and and the urceolus connection part between distance directly influenced stress distribution between urceolus and the inner core.

After the utility model deep cooling storage tank machines; In use because the inner core temperature reduces the dimensional changes cause can make lacing wire and strengthen with the stress of inner/outer tube connection part; Through test shows, only in the utility model length relation scope, the stress distribution of lacing wire connection part is just more reasonable; Ensure the use of deep cooling storage tank, eliminate safe hidden trouble.

Description of drawings

Fig. 1 is a kind of structural representation that reduces the deep cooling storage tank of internal stress of the utility model.

Embodiment

Referring to Fig. 1; A kind of deep cooling storage tank that reduces internal stress of the utility model; Comprise urceolus 1 and inner core 2, arrange three groups of lacing wires uniformly around inner core 2 circumferencial directions in the chuck between urceolus 1 and the inner core 2, every group of lacing wire comprises laterally zygomorphic first lacing wire 6 and second lacing wire 7.

Inner core 2 by the straight tube that is in the middle part 4, the upper cover 3 and the lower seal head 5 that are used to seal straight tube 4 both ends opens constitute; First lacing wire, 6 one ends are connected upper cover 3 outer walls; The other end extends until urceolus 1 inwall below tiltedly; Second lacing wire, 7 one ends are connected lower seal head 5 outer walls, and the other end extends until urceolus 1 inwall along oblique upper.

On the axial direction of inner core, the length H1 of first lacing wire 6: the length H3 of second lacing wire 7: every group two lacing wires and the length H2=1 between the urceolus connection part: 1: 2.

The length of two lacing wires in every group (in the projected length on the inner core axis) and and the urceolus connection part between distance directly influenced stress distribution between urceolus and the inner core; Through test shows; Only in the utility model length relation scope; The stress distribution of lacing wire connection part is just more reasonable, ensures the use of deep cooling storage tank, eliminates safe hidden trouble.

Claims

1. deep cooling storage tank that reduces internal stress; Comprise urceolus and inner core; Arrange at least three group lacing wires uniformly around the inner core circumferencial direction in the chuck between urceolus and the inner core, every group of lacing wire comprises laterally zygomorphic first lacing wire and second lacing wire, it is characterized in that; On the axial direction of described inner core, the length of first lacing wire: the length of second lacing wire: every group two lacing wires and length=1: 1: 1.5～2.5 between the urceolus connection part.

2. the deep cooling storage tank that reduces internal stress as claimed in claim 1; It is characterized in that; On the axial direction of described inner core, the length of first lacing wire: the length of second lacing wire: every group two lacing wires and length=1: 1: 1.6～2.2 between the urceolus connection part.

3. the deep cooling storage tank that reduces internal stress as claimed in claim 2; It is characterized in that; Described inner core by the straight tube that is in the middle part, the upper and lower end socket that is used to seal straight tube both ends open constitutes, described first lacing wire, one end is connected the upper cover outer wall, the other end is connected outer tube inner wall; Described second lacing wire, one end is connected the lower seal head outer wall, and the other end is connected outer tube inner wall.

4. the deep cooling storage tank that reduces internal stress as claimed in claim 3 is characterized in that, in two lacing wires of every group, with the connection part of urceolus with respect to drawing close each other with the connection part of inner core.