Cryogenic Fully Enclosed Storage Tank Pressure Ring Fitting

Abstract

This utility model relates to the field of pressure vessel manufacturing technology, specifically a pressure ring jig for a cryogenic fully enclosed storage tank. The jig includes an inclined support block, columns, and stops. Columns are provided at both ends of the bottom of the inclined support block, and the stops are located on the lower side of the inclined support block. The top of the stops is cut into a top surface perpendicular to the inclined support block, and a vertical slit is reserved between the stops and the columns. Several jigs are arranged in combination according to the curvature of the pressure ring. The stops and columns of the jigs are welded to the base plate. The jig structure is simple and practical, and can fully ensure the stability and welding accuracy of the inclined plate and vertical plate of the pressure ring during welding, while greatly improving welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel manufacturing technology, specifically to a pressure ring jig for a cryogenic fully enclosed storage tank. Background Technology

[0002] Due to the pressure inside the cryogenic fully enclosed storage tank, circumferential compressive stress is generated at the connection between the tank wall and the tank top. As an important component connecting the tank wall and the tank top, the pressure ring tightly connects the tank wall and the tank top together to form an integral structure. This ensures that the storage tank can withstand the effects of internal pressure and external loads when storing cryogenic liquid media, and also helps to ensure the stability and sealing of the tank top.

[0003] The construction quality of the pressure ring directly affects the overall construction quality and operational safety of the storage tank. Accurate fabrication and installation of the pressure ring ensures the reliability of the storage tank. During installation, a ring-shaped pressure ring needs to be fabricated first, and then welded to the outer tank. Due to the large size of the pressure ring, it is generally not advisable to fabricate it in a steel structure factory and then transport it to the site. On-site fabrication makes it difficult to guarantee the welding accuracy of the pressure ring. Therefore, there is an urgent need for a tooling system for positioning and facilitating the welding of the pressure ring's inclined plate and vertical plate. Summary of the Invention

[0004] In view of the technical problems existing in the prior art, this utility model proposes a pressure ring jig for a cryogenic fully enclosed storage tank.

[0005] The present invention relates to a pressure ring jig for a cryogenic fully enclosed storage tank, characterized in that the jig includes an inclined support block, a column, and a stop block. The column is provided at both ends of the bottom of the inclined support block, and the stop block is located on the lower side of the inclined support block. The top of the stop block is cut into a top surface perpendicular to the inclined support block, and a vertical slit is reserved between the stop block and the column. Several jigs are arranged in accordance with the curvature of the pressure ring to form an assembly, and the stop block and the column of the jig are both welded to the base plate.

[0006] Several identical pressure ring inclined plates and pressure ring vertical plates are fabricated in the factory according to design standards. The pressure ring components are then welded together to form a pressure ring. The pressure ring inclined plates are placed on the inclined support blocks of adjacent jigs, with their bottoms supported by stop blocks. The pressure ring vertical plates are placed against the stop blocks on the connecting plate between the stop blocks and the columns, thus completing the assembly of a single pressure ring. Then, the pressure ring inclined plates are welded together to form a whole.

[0007] More specifically, the inclined support block, column, and stop are all made of I-beams, with one side of the inclined support block facing upwards. A clamping plate is also provided on the inclined support block. The clamping plate is made of a section of C-shaped steel, and the two sides of the clamping plate are precisely clamped to the two sides of the wing plate of the inclined support block. A wedge is provided between the clamping plate and the inclined support block to fix the pressure ring component, so that the pressure ring component is always in close contact with the inclined support block, ensuring the stability and accuracy during welding.

[0008] More specifically, the welded connecting block between the column and the stop block ensures the stability of the column and the stop block, and provides bottom support for the pressure ring vertical plate, so that the top of the pressure ring vertical plate always keeps in contact with the pressure ring inclined plate, providing a foundation for the welding operation of the pressure ring vertical plate and the pressure ring inclined plate.

[0009] This utility model relates to a pressure ring jig for a cryogenic fully enclosed storage tank. It has a simple and practical structure, which can fully ensure the stability and welding accuracy of the inclined plate and the vertical plate of the pressure ring during welding, while greatly improving welding efficiency. At the same time, the jig is easy to obtain materials, quick to process, and can be quickly disassembled after use, making it worthy of promotion. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a diagram showing the usage state of this utility model.

[0012] Among them, there are inclined support block 1, column 2, stop block 3, clamping plate 4, wedge block 5, connecting block 6, pressure ring inclined plate 7, and pressure ring vertical plate 8. Detailed Implementation

[0013] Example 1: A pressure ring jig for a cryogenic fully enclosed storage tank, comprising an inclined support block 1, a column 2, and a stop block 3. The inclined support block 1 has columns 2 at both ends of its bottom. The stop block 3 is located on the lower side of the inclined support block 1, and its top is cut perpendicular to the inclined support block 1. A vertical slit is reserved between the stop block 3 and the column 2. Several jigs are arranged according to the curvature of the pressure ring to form an assembly. The stop block 3 and column 2 of the jig are welded to the base plate. The inclined support block 1, column 2, and stop block 3 are all made of I-beams. One side of the inclined support block 1 has an upward-facing flange. A clamping plate 4 is also provided on the inclined support block 1. The clamping plate 4 is made of segmented C-shaped steel, and its two sides are precisely clamped to the two sides of the flange of the inclined support block 1. A wedge 5 is provided between the clamping plate 4 and the inclined support block 1. A connecting block 6 is welded between the column 2 and the stop block 3. In use, the inclined plate 7 of the bearing ring is placed on the top surface of the inclined support, and the vertical plate 8 of the bearing ring is placed between the column 2, the stop block 3 and the connecting block 6. The operator welds the inclined plate 7 of the bearing ring and the vertical plate 8 of the bearing ring to achieve high-quality and high-efficiency welding processing.

[0014] After completion, the outer tank (prestressed concrete) and the inner tank (9Ni steel) of the full-containment tank achieve load coordination through the pressure ring: the internal pressure (about 20 kPa) generated by LNG evaporation in the inner tank is transferred to the outer tank through the pressure ring, while the horizontal shear force of the outer tank under seismic conditions can also be dispersed to the foundation through the pressure ring.

Claims

1. A low temperature full containment tank pressure shell mould characterized in that The fixture includes an inclined support block (1), a column (2) and a stop block (3). The column (2) is provided at both ends of the bottom of the inclined support block (1). The stop block (3) is located on the lower side of the inclined support block (1). The top of the stop block (3) is cut into a top surface perpendicular to the inclined support block (1). A vertical slit is reserved between the stop block (3) and the column (2). Several fixtures are arranged in accordance with the arc of the pressure ring to form a combination. The stop block (3) and the column (2) of the fixture are both welded to the base plate.

2. The low temperature fully contained tank pressure shell mold of claim 1 wherein The inclined support block (1), column (2) and stop block (3) are all made of I-beams. One side of the inclined support block (1) has an upward-facing wing plate. A clamping plate (4) is also provided on the inclined support block (1). The clamping plate (4) is made of a section of C-shaped steel. The two sides of the clamping plate (4) are clamped to the two sides of the wing plate of the inclined support block (1). A wedge (5) is provided between the clamping plate (4) and the inclined support block (1).

3. The low temperature fully contained tank pressure shell mold of claim 1 wherein A connecting block (6) is welded between the column (2) and the stop block (3).

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