Low-temperature expansion joint auxiliary false sample tool for LNG ship low-temperature pipeline

Abstract

The utility model discloses a low-temperature expansion joint auxiliary false sample tool for an LNG ship low-temperature pipeline. The low-temperature expansion joint auxiliary false sample tool comprises a fixed section and an adjusting section. The fixed section comprises a first end flange positioned on the outer side; the fixed pipe is positioned in the middle; the communicating pipe is positioned in the middle; the lifting lug is arranged on the fixed pipe; the middle flange is positioned in the middle; the reinforcing ring is positioned on the surface of the middle flange; the adjusting base column is positioned on the surface of the middle flange; the adjusting section comprises a first nut, a second nut and a screw rod which are connected with the adjusting base column; the second end flange is positioned on the outer side; according to the low-temperature expansion joint auxiliary false sample tool for the LNG ship low-temperature pipeline, a two-section type structure is adopted, the supporting section plays a role in supporting a base body of the stable structure, the parallelism and the overall size of the two flanges at the ends can be easily adjusted through the adjusting section, and quick disassembly can be achieved through the adjusting section after the tool is used.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary tooling for LNG ships, in particular to an auxiliary dummy tooling for low-temperature expansion joints used for low-temperature pipelines of LNG ships. Background Art

[0002] During the current domestic LNG ship construction process, cryogenic expansion joints for cryogenic pipelines have the characteristics of long ordering cycles and high unit value. If the actual finished product is directly installed during the pipeline construction and installation process, due to the long construction cycle of LNG ships, it will be necessary to carefully protect it during the construction period, which will incur a lot of costs. Due to its long ordering cycle, it is possible that the product will not arrive during the pipeline installation verification and testing, causing waiting for construction time, which will also incur a lot of construction costs. Therefore, during the construction of LNG ships, shipyards use auxiliary dummy tooling to replace the cryogenic expansion joints for cryogenic pipelines, and then install the actual cryogenic expansion joints after installation and test verification. After investigation, it was found that the existing cryogenic expansion joint dummy tooling is bulky, inconvenient to install and disassemble, and the manufacturing precision is difficult to control or the manufacturing cost is high, so new design requirements are proposed. Summary of the Invention

[0003] This invention, specifically designed for LNG ship construction, provides a cryogenic expansion joint auxiliary dummy tooling for cryogenic pipelines on LNG ships. This tooling possesses the full dimensional attributes of an actual cryogenic expansion joint, including installation dimensions with tolerance requirements, and basic functional attributes, including medium flow capacity. Furthermore, it features a simple and compact structure, low weight, ease of operation, and reusability. It enables rapid positioning, installation, adjustment, and disassembly, improving operational efficiency and reducing tooling manufacturing costs through reuse.

[0004] The present invention relates to a cryogenic expansion joint auxiliary dummy tooling for cryogenic pipelines of LNG ships, comprising: a fixed section, an adjusting section;

[0005] The fixing section includes: a first end flange located on the outside; a fixing pipe connected to the first end flange through hole bolts and located in the middle; a connecting pipe directly connected to the first end flange through holes and located in the middle; and a lifting lug arranged on the surface of any of the fixing pipes.

[0006] An intermediate flange is connected to the fixed pipe through hole bolts and is located in the middle; the intermediate flange is directly connected to the connecting pipe through holes; a reinforcement ring is provided on the surface of the intermediate flange away from the first end flange; an adjustment base column is provided on the surface of the intermediate flange away from the first end flange.

[0007] The adjustment section includes: a screw rod connected to the adjustment base column through a first nut and a second nut bolt; a second end flange connected to the screw rod bolt and located on the outside; the first nut and the second nut are respectively located on both sides of the surface of the middle flange; the second end flange is directly connected to the connecting pipe through a hole.

[0008] The number of the fixing pipes is three, the number of the adjusting base columns is three, the number of the first nuts is three, the number of the second nuts is three, and the number of the screw rods is three. The connecting pipe is made of 316 material or 316L.

[0009] The auxiliary dummy tooling for cryogenic expansion joints for cryogenic pipelines of LNG ships of the present invention adopts a two-section structure. The supporting section serves as a base for supporting and stabilizing the structure. The parallelism and overall dimensions of the two flanges at the ends can be easily adjusted by using the adjusting section. When the tooling is no longer in use, it can be quickly disassembled through the adjusting section. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the present invention.

[0011] Figure 2 It is a side schematic diagram of the present invention.

[0012] Figure 3 It is a schematic structural diagram of the fixed section of the present invention.

[0013] Figure 4 It is a schematic structural diagram of the regulating section of the present invention. DETAILED DESCRIPTION

[0014] Combined with attachment Figures 1 to 4 The present invention relates to a cryogenic expansion joint auxiliary dummy tooling for cryogenic pipelines of LNG ships, comprising: a fixed section, an adjusting section;

[0015] The fixing section includes: a first end flange 1 located on the outside; a fixing pipe 2 connected to the first end flange 1 via hole bolts and located in the middle; a connecting pipe 3 directly connected to the first end flange 1 via holes and located in the middle; and a lifting lug 11 provided on the surface of any of the fixing pipes 2.

[0016] An intermediate flange 6 is connected to the fixing pipe 2 via hole bolts and is located in the middle; the intermediate flange 6 is directly connected to the connecting pipe 3 via holes; a reinforcement ring 7 is provided on the surface of the intermediate flange 6 away from the first end flange 1; an adjustment base column 5 is provided on the surface of the intermediate flange 6 away from the first end flange 1;

[0017] The adjustment section includes: a screw rod 9 bolted to the adjustment base column 5 through a first nut 4 and a second nut 8; a second end flange 10 bolted to the screw rod 9 and located on the outside; the first nut 4 and the second nut 8 are respectively located on both sides of the surface of the intermediate flange 6; the second end flange 10 is directly connected to the connecting pipe 3 through a hole.

[0018] The number of the fixing tubes 2 is three, the number of the adjusting base columns 5 is three, the number of the first nuts 4 is three, the number of the second nuts 8 is three, and the number of the screw rods 9 is three.

[0019] The connecting pipe 3 is made of 316 material or 316L.

[0020] The auxiliary dummy tooling operation of the cryogenic expansion joint for the cryogenic pipeline of the LNG ship is divided into two stages: installation and disassembly. The adjustment section is used for adjustment in both stages. The specific operation process is as follows.

[0021] During installation, to ensure the final dimensions of the entire pipeline, the cryogenic expansion joint auxiliary mockup tooling utilizes the first nut, second nut, and bolt, allowing for screw adjustment based on the screw and adjustment base to ensure the parallelism and overall length of the two end flanges meet the requirements of the final product cryogenic expansion joint. Loosening the first nut and tightening the second nut shortens the length, while tightening the second nut increases it. Adjustments can be made individually, in pairs, or together to achieve parallelism and length adjustments consistent with the final product's dimensions.

[0022] During disassembly, after the overall pipeline installation is completed and the experimental verification is completed, when the formal product low-temperature expansion joint is installed, it is only necessary to loosen the first nut of the adjustment section and tighten the second nut to shorten the length of the tooling. After the length is shortened, it can be disassembled to achieve the reuse of the auxiliary tooling.

[0023] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A cryogenic expansion joint auxiliary dummy tooling for cryogenic pipelines on LNG ships, characterized by: Including fixed section and adjustment section; The fixing section comprises: a first end flange (1) located on the outside; a fixing pipe (2) connected to the first end flange (1) via hole bolts and located in the middle; a connecting pipe (3) directly connected to the first end flange (1) via holes and located in the middle; and a lifting lug (11) provided on the surface of any one of the fixing pipes (2); An intermediate flange (6) is connected to the fixed pipe (2) via hole bolts and is located in the middle; the intermediate flange (6) is directly connected to the connecting pipe (3) via holes; a reinforcement ring (7) is provided on the surface of the intermediate flange (6) away from the first end flange (1); an adjustment base column (5) is provided on the surface of the intermediate flange (6) away from the first end flange (1); The adjustment section comprises: a screw rod (9) bolted to the adjustment base column (5) via a first nut (4) and a second nut (8); a second end flange (10) bolted to the screw rod (9) and located on the outside; the first nut (4) and the second nut (8) are respectively located on both sides of the surface of the intermediate flange (6); and the second end flange (10) is directly connected to the connecting pipe (3) via a hole.

2. The auxiliary dummy tooling for cryogenic expansion joints for cryogenic pipelines of LNG ships according to claim 1 is characterized in that The number of the fixed tubes (2) is three.

3. The auxiliary dummy tooling for cryogenic expansion joints for cryogenic pipelines of LNG ships according to claim 1 is characterized in that The number of the adjustment base columns (5) is three.

4. The auxiliary dummy tooling for cryogenic expansion joints for cryogenic pipelines of LNG ships according to claim 1 is characterized in that The number of the first nuts (4) is three.

5. The auxiliary dummy tooling for cryogenic expansion joints for cryogenic pipelines of LNG ships according to claim 1 is characterized in that The number of the second nuts (8) is three.

6. The auxiliary dummy tooling for cryogenic expansion joints for cryogenic pipelines of LNG ships according to claim 1 is characterized in that The number of the screws (9) is three.

7. The auxiliary dummy tooling for cryogenic expansion joints for cryogenic pipelines of LNG ships according to claim 1 is characterized in that The connecting pipe (3) is made of 316 material.

8. The auxiliary dummy tooling for cryogenic expansion joints for cryogenic pipelines on LNG ships according to claim 1 is characterized in that The connecting pipe (3) is made of 316L material.

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