阅读说明：本技术 低温储罐顶部结构 (Low temperature storage tank top structure ) 是由 章雅琴 张春华 张永福 金建兴 张振宇 乔威威 于 2021-01-21 设计创作，主要内容包括：本发明涉及一种低温储罐顶部结构。它包括外罐和设于外罐内且与外罐之间具有间隙的内罐,外罐的上端高于内罐的上端,内罐上方的穹顶的下缘支承在外罐的上端,吊顶吊挂在穹顶下方并位于内罐内,吊顶靠近外圈的位置与穹顶之间设有竖向设置的挡墙,在内罐内壁靠近上端的位置固定有环形板状且水平设置的加强圈,加强圈的外缘与内罐的内壁固定,所述加强圈的内缘与竖向挡圈固定,所述竖向挡圈呈环形板状并竖向设置,竖向挡圈的上端高于加强圈的上表面,所述吊顶的外径大于竖向挡圈的内径,吊顶外缘位于加强圈的上方,在吊顶与加强圈之间设置有截面呈倒L形的封边折板,所述封边折板的水平部与吊顶固定,封边折板的竖向部向下延伸至加强圈的上表面。(The invention relates to a top structure of a low-temperature storage tank. The suspended ceiling comprises an outer tank and an inner tank which is arranged in the outer tank and has a gap with the outer tank, the upper end of the outer tank is higher than the upper end of the inner tank, the lower edge of a dome above the inner tank is supported at the upper end of the outer tank, a suspended ceiling is suspended below the dome and positioned in the inner tank, a vertically arranged retaining wall is arranged between the position of the suspended ceiling close to an outer ring and the dome, an annular plate-shaped horizontally arranged reinforcing ring is fixed at the position of the inner wall of the inner tank close to the upper end, the outer edge of the reinforcing ring is fixed with the inner wall of the inner tank, the inner edge of the reinforcing ring is fixed with a vertical check ring, the vertical check ring is annular plate-shaped and vertically arranged, the upper end of the vertical check ring is higher than the upper surface of the reinforcing ring, the outer diameter of the suspended ceiling is larger than the inner diameter of the vertical check ring, the outer edge of the suspended ceiling, the vertical portion of the closeout flap extends downwardly to an upper surface of the reinforcement ring.)

1. A low temperature storage tank roof structure which characterized in that: the suspended ceiling comprises an outer tank and an inner tank which is arranged in the outer tank and has a gap with the outer tank, the upper end of the outer tank is higher than the upper end of the inner tank, the lower edge of a dome above the inner tank is supported at the upper end of the outer tank, a suspended ceiling is suspended below the dome and positioned in the inner tank, a vertically arranged retaining wall is arranged between the position of the suspended ceiling close to an outer ring and the dome, an annular plate-shaped horizontally arranged reinforcing ring is fixed at the position of the inner wall of the inner tank close to the upper end, the outer edge of the reinforcing ring is fixed with the inner wall of the inner tank, the inner edge of the reinforcing ring is fixed with a vertical retaining ring, the vertical retaining ring is in an annular plate shape and is vertically arranged, the upper end of the vertical retaining ring is higher than the upper surface of the reinforcing ring, the outer diameter of the suspended ceiling is larger than the inner diameter of the vertical retaining ring, the outer edge of the suspended, the vertical portion of banding flap downwardly extending to the upper surface of reinforcing ring, the regional heat-insulating material that has the compressibility and have the resilience is filled to the U type ring portion on the reinforcing ring, between banding flap and the inner tank wall, fill perlite granule to dome between upper portion, outer tank wall and the barricade of heat-insulating material.

2. The roof structure of the low-temperature storage tank as claimed in claim 1, wherein the bottom of the heat insulating material is provided with glass fiber cloth, the glass fiber cloth extends upwards along the retaining wall from the inner wall of the inner tank to be anchored with the retaining wall or the dome after sequentially passing through the upper surface of the reinforcing ring and the vertical part of the edge sealing folded plate, the heat insulating material is vertically stacked and arranged in a space enclosed by the glass fiber cloth and the inner wall of the inner tank, and the perlite particles are filled in the space of the folded heat insulating material and between the heat insulating material and the dome.

3. The low temperature storage tank roof structure of claim 2, wherein the glass fiber cloth is riveted to the horizontal portion of the sealing flap, and the glass fiber cloth is provided with a wrinkle structure at positions corresponding to both sides of the fixing portion of the glass fiber cloth and the sealing flap.

4. The cryogenic storage tank roof structure of claim 2, wherein the insulation material is stacked vertically to a height greater than the distance from the upper surface of the stiffener to the upper surface of the suspended ceiling.

5. The cryogenic storage tank roof structure of claim 1, wherein the insulation material is glass wool or elastic felt or low temperature sponge or melamine foam.

6. The cryogenic storage tank top structure of claim 1, 2 or 3, wherein the vertical portions of the edge flaps have a gap with the vertical collar.

7. The cryogenic storage tank top structure of claim 1, 2 or 3, wherein a gap is provided between the lower vertical end of the edge flap and the upper surface of the stiffener ring.

8. The cryogenic storage tank top structure of claim 1, 2 or 3, wherein the vertical portion sides of the closeout flaps abut an outer edge of the suspended ceiling.

Technical Field

The present invention relates to a roof structure of a cryogenic storage tank for storing cryogenic liquefied gas, such as LNG, LPG, liquid nitrogen, liquid oxygen, ethylene, propylene, liquid ammonia, and the like.

Background

In the field of cryogenic engineering technology, cryogenic liquid storage tanks are used to store cryogenic liquefied gases such as LNG, LPG, liquid nitrogen, liquid oxygen, ethylene, propylene, liquid ammonia, and the like. The low-temperature liquid storage tank is of a double-layer structure consisting of an inner tank and an outer tank, the inner tank is used for storing low-temperature liquid, the outer tank is filled with cold insulation materials and evaporated gas, and the suspended ceiling of the inner tank is suspended on the dome of the outer tank through a suspension rod. The inner tank ceiling plays two roles of sealing and bearing a top heat insulation material, and if the sealing is not good, the heat insulation material of the outer tank can enter the inner tank or equipment to pollute products or influence the normal operation of the equipment; the cold insulation effect of the storage tank is influenced, low-temperature liquid is gasified, and great influence is generated on the performance safety of the storage tank.

Disclosure of Invention

The invention aims to provide a low-temperature storage tank top structure which has a good heat insulation effect, can be adaptive to expansion with heat and contraction with cold of a storage tank, can effectively prevent heat insulation materials from entering an inner tank to pollute products, and solves the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: the top structure of the low-temperature storage tank comprises an outer tank and an inner tank which is arranged in the outer tank and has a gap with the outer tank, the upper end of the outer tank is higher than the upper end of the inner tank, the lower edge of a dome above the inner tank is supported at the upper end of the outer tank, a suspended ceiling is hung below the dome and is positioned in the inner tank, a vertically arranged retaining wall is arranged between the position of the suspended ceiling close to an outer ring and the dome, an annular plate-shaped horizontally arranged reinforcing ring is fixed at the position of the inner wall of the inner tank close to the upper end, the outer edge of the reinforcing ring is fixed with the inner wall of the inner tank, the inner edge of the reinforcing ring is fixed with a vertical retaining ring, the vertical retaining ring is in an annular plate shape and is vertically arranged, the upper end of the vertical retaining ring is higher than the upper surface of the reinforcing ring, the outer diameter of the suspended ceiling is larger than the inner diameter, the horizontal part of banding folded plate is fixed with the furred ceiling, and the vertical portion downwardly extending of banding folded plate reaches the upper surface of reinforcing ring, and U type ring portion regional packing that has compressibility and has the heat-insulating material of resilience force on the reinforcing ring, between banding folded plate and the inner tank wall, fill perlite granule to dome between upper portion, outer tank wall and the barricade of heat-insulating material. The heat-insulating material with compressibility and resilience can be adaptively adjusted along with the change of temperature so as to ensure the sealing of a U-shaped ring area on the reinforcing ring and between the edge sealing folded plate and the inner tank wall, the heat-insulating effect is improved, the outer diameter of the suspended ceiling is larger than the inner diameter of the vertical retainer ring, so that the outer edge of the suspended ceiling is positioned above the reinforcing ring, the arrangement of the insulating material is convenient, a certain distance is reserved between the insulating material and the vertical retainer ring, and an elastic telescopic space for filling the insulating material in the U-shaped ring area on the reinforcing ring and between the edge sealing folded plate and the inner tank wall is formed; the horizontal part of the L-shaped sealing edge folded plate is fixed with the suspended ceiling, so that the sealing edge folded plate and the suspended ceiling can be prevented from generating gaps, the heat-insulating material can be effectively prevented from entering the inner tank to pollute the product, and meanwhile, the fixing mode and the installation difficulty of the sealing edge folded plate are greatly simplified.

Preferably, the bottom of the heat-insulating material is provided with glass fiber cloth, the glass fiber cloth sequentially passes through the upper surface of the reinforcing ring and the vertical part of the edge sealing folded plate from the inner wall of the inner tank and then continues to extend upwards along the retaining wall to be anchored with the retaining wall or the dome, the heat-insulating material is vertically stacked and arranged in a space enclosed by the glass fiber cloth and the inner wall of the inner tank, and the perlite particles are filled in the space of the folded heat-insulating material and between the heat-insulating material and the dome. The glass fiber cloth forms continuous closure with the inner wall of inner tank, the upper surface of the reinforcing ring, the vertical part of the edge sealing folded plate and the retaining wall, thereby further preventing heat insulation materials from entering the inner tank.

Preferably, the glass fiber cloth is fixed to the horizontal portion of the edge sealing flap plate, and wrinkle structures are respectively arranged on the glass fiber cloth corresponding to the two side positions of the fixing portion of the glass fiber cloth and the edge sealing flap plate. The fold structures on the two sides of the fixing part can adapt to thermal expansion and contraction of heat insulation materials and perlite particles, the perlite particles are wrapped, the heat insulation effect is guaranteed, and heat insulation materials such as the heat insulation perlite particles are prevented from entering the inner tank.

Preferably, the height of the thermal insulation materials stacked vertically is larger than the distance from the upper surface of the reinforcing ring to the upper surface of the suspended ceiling.

Preferably, the heat insulating material is glass wool or elastic felt or low-temperature sponge or melamine foam.

Preferably, a gap is formed between the vertical part of the sealing edge folding plate and the vertical retainer ring, and the gap can provide a deformation space for thermal expansion and contraction for heat insulation materials and perlite particle heat insulation materials, so that the sealing and heat insulation effects are ensured.

Preferably, the lower end of the vertical part of the edge sealing folded plate and the upper surface of the reinforcing ring are provided with a gap, so that the lower end of the vertical part of the edge sealing folded plate is prevented from being in rigid contact with the upper surface of the reinforcing ring, a deformation space for expansion with heat and contraction with cold is further provided for the heat insulating material and the perlite particle heat insulating material, and the sealing and heat insulating effects are ensured.

Preferably, the vertical portion side of the banding flap is abutted against the outer edge of the suspended ceiling so as to support the vertical portion of the banding flap, prevent the vertical portion of the banding flap from being excessively squeezed to bear the pressure of expansion with heat and contraction with cold from the heat insulating material and the perlite particle heat insulating material, and guarantee the sealing and heat insulating effects.

The invention has the advantages of good heat preservation effect, self-adaptation to expansion with heat and contraction with cold of the storage tank, effective prevention of the heat preservation material from entering the inner tank to pollute the product, and the like.

Drawings

FIG. 1 is a schematic partial structure;

fig. 2 is an enlarged view of fig. 1 at a.

Detailed Description

The invention is further described below with reference to the figures and specific embodiments.

As shown in figures 1 and 2, the top structure of the low-temperature storage tank comprises an outer tank 1 and an inner tank 3 which is arranged in the outer tank 1 and has a gap 2 with the outer tank 1, the upper end of the outer tank 1 is higher than the upper end of the inner tank 3, the lower edge of a dome 4 above the inner tank 3 is supported at the upper end of the outer tank 1, a suspended ceiling 5 is suspended below the dome 4 and is positioned in the inner tank 3, a vertically arranged retaining wall 6 is arranged between the suspended ceiling 5 and the dome 4, an annular plate-shaped horizontally arranged reinforcing ring 7 is fixed at the position of the inner wall of the inner tank 3 close to the upper end, the outer edge of the reinforcing ring 7 is fixed with the inner wall of the inner tank 3, the inner edge of the reinforcing ring 7 is fixed with a vertical retaining ring 8, the vertical retaining ring 8 is annular plate-shaped and is vertically arranged, the upper end of the vertical retaining ring 8 is higher than the upper surface of the reinforcing ring 7, the outer diameter of the suspended ceiling 5 is, be provided with the banding flap plate 9 that the cross-section is down L shape between furred ceiling 5 and reinforcing ring 7, the horizontal part 10 of banding flap plate 9 is riveted with furred ceiling 5, and the vertical portion 11 downwardly extending of banding flap plate 9 reaches the upper surface of reinforcing ring 7, and on reinforcing ring 7, the regional heat-insulating material 12 that has compressibility and have the resilience of U type ring portion between the inner wall of banding flap plate 9 and inner tank 3, the heat-insulating material is the glass cotton. The bottom of the heat insulating material 12 is provided with glass fiber cloth 13, the glass fiber cloth 13 continuously extends upwards along the retaining wall from the inner wall of the inner tank 3 to be anchored with the retaining wall 6 after sequentially passing through the upper surface of the reinforcing ring 7 and the vertical part of the edge sealing folded plate 9, the glass fiber cloth 13 is riveted with the horizontal part 10 of the edge sealing folded plate 9, and the two side positions of the glass fiber cloth 13 corresponding to the riveting parts of the glass fiber cloth and the edge sealing folded plate are respectively provided with a fold structure 16.

The heat insulating material 12 is vertically stacked and arranged in a space enclosed by the glass fiber cloth 13 and the inner wall of the inner tank 3, perlite particles are filled among the upper part of the heat insulating material 12, the outer tank wall and the retaining wall to the dome, the perlite particles 14 are filled in the gap of the folded heat insulating material 12 and between the heat insulating material 12 and the dome 4, and the vertically stacked height of the heat insulating material 12 is larger than the distance from the upper surface of the reinforcing ring 7 to the upper surface of the suspended ceiling 5. A gap 17 is formed between the vertical part 11 of the sealing and folding plate and the vertical retainer ring 8, a gap 18 is formed between the lower end of the vertical part 11 of the sealing and folding plate and the upper surface of the reinforcing ring 7, and the vertical 11 side surface of the sealing and folding plate is abutted against the outer edge of the suspended ceiling 5.