CN220102842U - LNG storage tank hot angle safety protection structure - Google Patents

Abstract

The utility model relates to a thermal angle safety protection structure of an LNG storage tank, which comprises a thermal insulation layer and a thermal angle protection wallboard, wherein the thermal insulation layer is arranged at the bottom of an inner tank and horizontally extends to the side part of the inner tank; the thermal angle protection wallboard comprises a plurality of protection wallboard components of a whole that can function independently from top to bottom, and the both sides position is all through middle horizontal annular backing plate body fixed connection between the two vertically adjacent protection wallboard components of a whole that can function independently from top to bottom, and both sides position is all through vertical backing plate body fixed connection between the two adjacent protection wallboard components of a whole that can function independently from top to bottom, and the tip of vertical backing plate body contacts with the terminal surface of middle horizontal annular backing plate body and is fixed through outer backing plate body, and the horizontal cross section of vertical backing plate body and the vertical cross section of middle horizontal annular backing plate body are H type column structure. The utility model has the following advantages: the impact on the low-temperature medium to the outer tank under the leakage working condition is reduced, and the installation efficiency and the installation accuracy are ensured.

Description

LNG storage tank hot angle safety protection structure

Technical Field

The utility model belongs to the field of LNG storage tanks, and particularly relates to a thermal angle safety protection structure of an LNG storage tank.

Background

With the enhancement of environmental protection consciousness and the development of changing national coal into natural gas, the demand for clean energy represented by Liquefied Natural Gas (LNG) is rapidly increasing, and the demand for low-temperature storage tanks is greatly increased, so that a full-capacity tank structure comprising an inner tank and an outer tank is generally adopted to ensure the safety of the low-temperature storage tanks. When the inner tank leaks, the outer tank can hold leaked low-temperature medium, keep air tightness and keep air tightness, but if the low-temperature medium leaks to be contacted with the outer tank, the outer tank is subjected to huge temperature difference stress and thermal shock, especially in a large fillet weld position where the outer tank body is connected with the bearing platform foundation slab, the welding stress is generated by welding between the outer tank and the bearing platform foundation slab, and the welding failure is extremely likely to occur in the large fillet weld position under the combined action of the temperature difference stress and the thermal shock, so that the leakage of the low-temperature medium is caused, and the large potential safety hazard exists.

For solving above-mentioned technical problem, set up hot angle safety protection structure in big fillet weld position generally, hot angle safety protection structure is including setting up insulating layer and the hot angle protection wallboard of big fillet weld position department between inner vessel and outer vessel, the insulating layer prevents that low temperature medium from getting into outer tank bottom region, prevent through setting up hot angle protection wallboard that low temperature medium from getting into outer tank lateral part region, insulating layer and hot angle protection wallboard combine together and isolate the cold energy transmission of leaking low temperature medium through bottom and lateral part two directions, current hot angle protection backing plate is vertical to be set up in the inboard of outer vessel, because the area of hot angle protection backing plate is great, consequently, need splice into annular form structure through the mode of butt joint rewelding by a plurality of protection wallboard components of a whole that can function independently, the location degree of difficulty is big when butt joint welding for the protection wallboard components of a whole that can function independently, be difficult to guarantee the heat angle protection wallboard after the welding, the last shrouding between unable installation hot angle protection wallboard and the outer vessel.

Disclosure of Invention

The utility model aims to overcome the defects, and provides a LNG storage tank thermal angle safety protection structure, which reduces impact on a low-temperature medium to an outer tank under a leakage working condition and ensures installation efficiency and installation accuracy.

The aim of the utility model is achieved by the following technical scheme: the LNG storage tank comprises an inner tank, an outer tank and a vacuum cold insulation layer arranged between the inner tank and the outer tank, wherein the heat corner safety protection structure is arranged between the inner tank and the outer tank and comprises a heat insulation layer and a heat corner protection wallboard, the heat insulation layer is arranged at the bottom of the inner tank and horizontally extends to the side part of the inner tank, the heat corner protection wallboard is arranged between the heat insulation layer and the outer tank, an upper sealing plate is arranged between the top of the heat corner protection wallboard and the outer tank, and a foam glass brick layer I is arranged between the heat corner protection wallboard and the outer tank;

the thermal angle protection wallboard comprises a plurality of protection wallboard components of a whole that can function independently of butt joint from top to bottom, and a plurality of protection wallboard components of a whole that can function independently are drawn in and are formed annular structure, and the both sides position is all through middle horizontal annular backing plate body fixed connection between the two adjacent protection wallboard components of a whole that can function independently of longitudinal direction, and both sides position is all through longitudinal backing plate body fixed connection between the two adjacent protection wallboard components of a whole that can function independently of annular, and the tip of longitudinal backing plate body contacts with the terminal surface of middle horizontal annular backing plate body and is fixed through outer backing plate body, and the horizontal cross section of longitudinal backing plate body and the longitudinal cross section of middle horizontal annular backing plate body are H type column structure.

The utility model further improves that: the heat insulation layer comprises a concrete ring beam and a foam glass brick layer II arranged in the concrete ring beam, wherein an edge plate is arranged on the lower end face of the concrete ring beam and horizontally extends towards the direction of the thermal angle protection wallboard.

The utility model further improves that: an upper horizontal annular backing plate body is arranged between the split protection wall plate and the upper sealing plate at the top, the upper end face of the upper horizontal annular backing plate body is flush with the upper end face of the upper sealing plate, the end part of the longitudinal backing plate body is in contact with the corresponding end face of the upper horizontal annular backing plate body and is fixed through the outer backing plate body, and the longitudinal section of the upper horizontal annular backing plate body is of an h-shaped structure.

The utility model further improves that: the bottom is arranged between the split protective wall plate and the edge plate, a lower horizontal annular base plate body is arranged between the split protective wall plate and the edge plate, the cross section of the lower horizontal annular base plate body is of a U-shaped structure with an upward opening, the lower end face of the split protective base plate arranged at the bottom is fixedly attached to the folded corner of the lower horizontal annular base plate body, and the end part of the longitudinal base plate body is contacted with the end face of the corresponding lower horizontal annular base plate body and is fixed through the outer base plate body.

The utility model further improves that: the bottom of the inner tank sequentially comprises a first concrete leveling layer, a third foam glass brick layer, a middle plate layer, a fourth foam glass brick layer and a second concrete leveling layer from inside to outside, wherein the lower end face of the second concrete leveling layer is a bearing platform foundation, and the middle plate layer is horizontally connected and fixed with the edge plate.

The utility model further improves that: the distance from the end of the foam glass brick layer four to the outer tank is smaller than the distance from the thermal angle protection wall plate to the outer tank.

Compared with the prior art, the utility model has the following advantages:

1. according to the utility model, the low-temperature medium is prevented from entering the bottom area of the outer tank through the heat insulation layer, the low-temperature medium is prevented from entering the side area of the outer tank through the heat corner protection wall plate, the heat insulation layer and the heat corner protection wall plate are combined to isolate the cold energy transmission of the leaked low-temperature medium in two directions of the bottom and the side, and the impact on the low-temperature medium to the outer tank under the leakage working condition is reduced.

2. The thermal angle protection wallboard is formed by splicing a plurality of protection wallboard split bodies, the two adjacent longitudinal protection wallboard split bodies are positioned and overlapped through the middle horizontal annular backing plate body of the H-shaped structure, the two adjacent transverse protection wallboard split bodies are positioned and overlapped through the longitudinal backing plate body of the H-shaped structure, so that the positioning of the two adjacent protection wallboard split bodies is facilitated, the connection stability between the protection wallboard split bodies can be ensured, the vertical alignment is accurate during installation, and the installation efficiency and the installation precision are ensured.

Drawings

Fig. 1 is a schematic structural view of a thermal angle safety protection structure of an LNG storage tank according to the present utility model.

Fig. 2 is a schematic structural view of the thermal corner protection wall plate in fig. 1.

Fig. 3 is a schematic cross-sectional view of the thermal corner protection wall plate of fig. 2.

Reference numerals in the drawings:

1-an outer tank, 2-an inner tank, 3-a vacuum cold insulation layer, 4-a heat insulation layer, 5-a hot corner protection wall layer, 6-an upper sealing plate, 7-a foam glass brick layer I, 8-a concrete leveling layer I, 9-a foam glass brick layer III, 10-a middle panel layer, 11-a foam glass brick layer IV, 12-a concrete leveling layer II and 13-a bearing platform foundation;

41-concrete ring beams, 42-foam glass brick layers II and 43-edge plates;

51-protection wall plate split, 52-middle horizontal annular base plate body, 53-longitudinal base plate body, 54-outer base plate body, 55-upper horizontal annular base plate body and 56-lower horizontal annular base plate body.

Detailed Description

The present utility model will be further described in detail with reference to the following examples and drawings for the purpose of enhancing the understanding of the present utility model, which examples are provided for the purpose of illustrating the present utility model only and are not to be construed as limiting the scope of the present utility model.

In the description of the present utility model, it should be understood that the term "orientation" or "positional relationship" as used herein with respect to the orientation or positional relationship shown in the drawings is merely for convenience of description and to simplify the description, and does not indicate or imply that the structures or units referred to must have a particular orientation and therefore should not be construed as limiting the utility model.

In the present utility model, unless otherwise specifically defined and limited, terms such as "connected," "provided," and "having" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, directly connected, and connected via an intermediate medium, so that it is possible for those skilled in the art to understand the basic meaning of the terms in the present utility model according to circumstances.

The utility model provides a LNG storage tank hot angle safety protection structure, as shown in figure 1, the LNG storage tank includes inner tank 2, outer tank 1 and vacuum cold insulation layer 3 placed between inner tank 2, outer tank 1, hot angle safety protection structure is placed between inner tank 2 and outer tank 1, including insulating layer 4 and hot angle protection wallboard 5, insulating layer 4 is placed in the bottom of inner tank 2 and extends to the lateral part of inner tank 2 horizontally, hot angle protection wallboard 5 sets up between insulating layer 4 and outer tank 1, there is upper shrouding 6 between the top of hot angle protection wallboard 5 and outer tank 1, there is foam glass brick layer one 7 between hot angle protection wallboard 5 and outer tank 1;

as shown in fig. 2, the thermal angle protection wall plate 5 includes a plurality of protection wall plate split bodies 51 that butt joint from top to bottom, the plurality of protection wall plate split bodies 51 enclose to form a ring structure, two side positions between two adjacent longitudinal protection wall plate split bodies 51 are all fixedly connected through a middle horizontal annular base plate body 52, two side positions between two adjacent annular protection wall plate split bodies 51 are all fixedly connected through a longitudinal base plate body 53, an end part of the longitudinal base plate body 53 contacts with an end surface of the middle horizontal annular base plate body 52 and is fixed through an outer base plate body 54, and a transverse section of the longitudinal base plate body 53 and a longitudinal section of the middle horizontal annular base plate body 52 are all in an H-shaped structure.

According to the utility model, the low-temperature medium is prevented from entering the bottom area of the outer tank 1 by the heat insulation layer 4, the low-temperature medium is prevented from entering the side area of the outer tank 1 by the heat corner protection wall plate 5, the heat insulation layer 4 and the heat corner protection wall plate 5 are combined to isolate the cold energy transmission of the leaked low-temperature medium in two directions of the bottom and the side, and the impact on the outer tank 1 by the low-temperature medium under the leakage working condition is reduced.

The thermal angle protection wallboard 5 is formed by splicing a plurality of protection wallboard split bodies 51, two adjacent longitudinal protection wallboard split bodies 51 are positioned and overlapped through the middle horizontal annular backing plate body 52 of the H-shaped structure, two adjacent transverse protection wallboard split bodies 51 are positioned and overlapped through the longitudinal backing plate body 53 of the H-shaped structure, positioning of the two adjacent protection wallboard split bodies 51 is facilitated, connection stability between the two adjacent protection wallboard split bodies 51 can be guaranteed, vertical alignment is accurate during installation, and installation efficiency and installation accuracy are guaranteed.

On the basis of the embodiment, as shown in fig. 3, an upper horizontal annular pad body 55 is arranged between the protection wall plate split body 51 and the upper sealing plate 6, the upper end surface of the upper horizontal annular pad body 55 is flush with the upper end surface of the upper sealing plate 6, the end part of the longitudinal pad body 53 is contacted with the end surface of the corresponding upper horizontal annular pad body 55 and is fixed through an outer pad body 54, and the longitudinal section of the upper horizontal annular pad body 55 is of an h-shaped structure.

The upper horizontal annular pad body 55 is designed into an h-shaped structure because: one end of the upper sealing plate 6 is horizontally embedded in the upper horizontal annular base plate body 55 and is in tight contact with the upper end of the protective base plate split body 51, and the upper end of the protective base plate split body 51 is embedded in the upper horizontal annular base plate body 55 and is in tight contact with the upper annular base plate body 55, so that the upper sealing plate 6 and the protective base plate split body 51 are rapidly positioned, and meanwhile, the upper sealing plate 6 and the protective base plate split body 51 are conveniently welded and fixed.

On the basis of the embodiment, a lower horizontal annular base plate body 56 is arranged between the protection wall plate split body 51 arranged at the bottom and the edge plate 43, the cross section of the lower horizontal annular base plate body 56 is of a U-shaped structure with an upward opening, the lower end face of the protection base plate split body 51 arranged at the bottom is attached and fixed to the corner of the lower horizontal annular base plate body 56, and the end part of the longitudinal base plate body 53 is contacted with the end face of the corresponding lower horizontal annular base plate body 56 and fixed through an outer base plate body 54.

The lower horizontal annular backing plate 56 is designed into a U-shaped structure with an upward opening, so that the lower end of the protection wall plate split 51 is embedded in the lower horizontal annular backing plate 56.

When the thermal angle protection wallboard 5 is installed, marks are made on the edge plate 43 in advance, the lower horizontal annular backing plate body 56 is welded and fixed with the edge plate 43 according to the marks, the plurality of protection wallboard split bodies 51 are inserted into the lower horizontal annular backing plate body 56 in an annular mode, the annular welding and fixing are carried out after the positions are adjusted, then the middle horizontal annular backing plate body 52 is sleeved on the upper end ring of the protection wallboard split bodies 51 in turn, the annular welding and fixing are carried out after the positions are adjusted, the plurality of protection wallboard split bodies 51 are inserted in the annular mode on the middle horizontal annular backing plate body 52 in an annular mode, the annular welding and fixing are carried out after the positions are adjusted, then the upper end of the upper annular backing plate body 55, the middle horizontal annular backing plate body 52 and the lower horizontal annular backing plate body 56 are sequentially sleeved on the top end of the upper end of the lower horizontal annular backing plate body 55, the end of the longitudinal backing plate body 53 is welded and fixed with the end face of the corresponding upper horizontal annular backing plate body 55, the middle horizontal annular backing plate body 52 and the end face of the corresponding upper annular backing plate body 56, finally the longitudinal backing plate body 3 and the lower horizontal backing plate body 54 are paved at the positions corresponding to the positions of the upper annular backing plate body 52 and the lower annular backing plate body 54 in an annular mode.

On the basis of the embodiment, the heat insulation layer 4 comprises a concrete ring beam 41 and a foam glass brick layer II 42 arranged in the concrete ring beam 41, the lower end face of the concrete ring beam 41 is provided with an edge plate 43, the edge plate 43 horizontally extends towards the direction of the thermal angle protection wall plate 5, and a low-temperature medium is arranged in the heat insulation layer 4 to enter the bottom area of the outer tank 1, so that a good isolation effect is achieved.

On the basis of the embodiment, the bottom of the inner tank 2 sequentially comprises a first concrete leveling layer 8, a third foam glass brick layer 9, a middle board layer 10, a fourth foam glass brick layer 11 and a second concrete leveling layer 12 from inside to outside, wherein the lower end face of the second concrete leveling layer 12 is a bearing platform foundation 13, and the middle board layer 10 is horizontally connected and fixed with an edge plate 43.

On the basis of the embodiment, the distance from the end of the foam glass brick layer IV 11 to the outer tank 1 is smaller than the distance from the thermal angle protection wall plate 5 to the outer tank 1.

It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. LNG storage tank hot angle safety protection structure, LNG storage tank includes inner tank (2), outer jar (1) and arranges vacuum cold insulation layer (3) between inner tank (2), outer jar (1), and hot angle safety protection structure arranges in between inner tank (2) and outer jar (1), its characterized in that: the heat insulation layer (4) is arranged at the bottom of the inner tank (2) and horizontally extends to the side part of the inner tank (2), the heat corner protection wall plate (5) is arranged between the heat insulation layer (4) and the outer tank (1), an upper sealing plate (6) is arranged between the top of the heat corner protection wall plate (5) and the outer tank (1), and a foam glass brick layer I (7) is arranged between the heat corner protection wall plate (5) and the outer tank (1);

the hot angle protection wallboard (5) comprises a plurality of protection wallboard split bodies (51) which are in butt joint up and down, the protection wallboard split bodies (51) are closed to form an annular structure, two side positions between two adjacent longitudinal protection wallboard split bodies (51) are fixedly connected through a middle horizontal annular backing plate body (52), two side positions between two adjacent annular protection wallboard split bodies (51) are fixedly connected through a longitudinal backing plate body (53), the end parts of the longitudinal backing plate body (53) are in contact with the end faces of the middle horizontal annular backing plate body (52) and are fixed through an outer backing plate body (54), and the transverse section of the longitudinal backing plate body (53) and the longitudinal section of the middle horizontal annular backing plate body (52) are of an H-shaped structure.

2. The LNG tank hot angle safety protection structure according to claim 1, wherein: an upper horizontal annular base plate body (55) is arranged between the protection wall plate split body (51) and the upper sealing plate (6) at the top, the upper end face of the upper horizontal annular base plate body (55) is flush with the upper end face of the upper sealing plate (6), the end part of the longitudinal base plate body (53) is in contact with the end face of the corresponding upper horizontal annular base plate body (55) and is fixed through an outer base plate body (54), and the longitudinal section of the upper horizontal annular base plate body (55) is of an h-shaped structure.

3. The LNG tank hot angle safety protection structure according to claim 2, wherein: the bottom is arranged between the protection wall plate split body (51) and the edge plate (43) and is provided with a lower horizontal annular base plate body (56), the cross section of the lower horizontal annular base plate body (56) is of a U-shaped structure with an upward opening, the lower end face of the bottom arranged protection base plate split body (51) is attached and fixed to the folded corner of the lower horizontal annular base plate body (56), and the end part of the longitudinal base plate body (53) is in contact with the end face of the corresponding lower horizontal annular base plate body (56) and is fixed through an outer base plate body (54).

4. A LNG tank thermal angle safety protection structure according to claim 3, characterized in that: the heat insulation layer (4) comprises a concrete ring beam (41) and a foam glass brick layer II (42) arranged in the concrete ring beam (41), wherein an edge plate (43) is arranged on the lower end face of the concrete ring beam (41), and the edge plate (43) horizontally extends towards the direction of the thermal angle protection wallboard (5).

5. The LNG tank hot angle safety protection structure according to claim 4, wherein: the bottom of inner tank (2) is from interior to exterior including concrete screed-coat (8), foam glass brick layer three (9), midrange sheet layer (10), foam glass brick layer four (11) and concrete screed-coat two (12) in proper order, the lower terminal surface of concrete screed-coat two (12) is cushion cap basis (13), midrange sheet layer (10) are fixed with edge board (43) horizontal connection.

6. The LNG tank hot angle safety protection structure according to claim 5, wherein: the distance from the end part of the foam glass brick layer IV (11) to the outer tank (1) is smaller than the distance from the thermal angle protection wallboard (5) to the outer tank (1).