CN110877678A - Method for realizing accurate installation of invar pipe of liquid cargo tank of LNG ship - Google Patents
Method for realizing accurate installation of invar pipe of liquid cargo tank of LNG ship Download PDFInfo
- Publication number
- CN110877678A CN110877678A CN201911080283.4A CN201911080283A CN110877678A CN 110877678 A CN110877678 A CN 110877678A CN 201911080283 A CN201911080283 A CN 201911080283A CN 110877678 A CN110877678 A CN 110877678A
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- Prior art keywords
- invar
- clamping
- basket
- installation
- tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
- B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
- B63B25/14—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed pressurised
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a method for realizing accurate installation of invar tubes of a liquid cargo tank of an LNG ship, which comprises the following steps: installing flower basket tools at reinforcing positions at two ends of the invar pipe through first clamping ends respectively; fixing a second clamping end of the basket fixture on the flat steel; a group of flower basket tools are added in the middle of the invar pipe in the length direction; the distance between the invar tube and the flat steel is adjusted by screwing the special nut of the basket fixture, and the basket fixtures at two ends are adjusted first and then the basket fixture in the middle is adjusted, so that the distance between the invar tube and the flat steel meets the installation requirement. The method not only effectively reduces the installation difficulty of the invar pipe of the liquid cargo tank of the LNG ship and improves the installation efficiency of the invar pipe of the liquid cargo tank of the LNG ship, but also greatly improves the installation precision of the invar pipe.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to a method for accurately installing invar pipes of a liquid cargo tank of an LNG ship.
Background
The invar pipe is mainly installed in the transverse ring area of the NO.96 type LNG ship, and the transverse ring is octagonal, so that the invar pipe installation faces the problem of operation at various angles; the invar pipe mounting height is controlled by the template in the real ship installation, and the required precision is height 9 ± 1mm, and the specification and size of standard invar pipe is: weight 80kg, length 3m, wing thickness 1.5 mm. Therefore, the installation efficiency of the invar pipe is greatly limited by the high-precision requirement of invar pipe installation in the production of a real ship, and the construction period of the whole LNG ship is prolonged.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for accurately installing invar tubes of a liquid cargo tank of an LNG ship.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for realizing accurate installation of invar tubes of a liquid cargo tank of an LNG ship is based on a basket fixture, and the basket fixture comprises: the clamping device comprises a first clamping end, a second clamping end and a special nut, wherein the first clamping end and the second clamping end are respectively provided with a clamping opening with a rectangular cross section and a stud protruding outside, the clamping opening is provided with a threaded hole, a screw is connected with the threaded hole in a threaded manner, the first clamping end and the clamping opening of the second clamping section are arranged in a back-to-back manner, one end of the special nut is connected with the stud of the first clamping end, and the other end of the special nut is connected with the stud of the second clamping end; the method comprises the following steps: installing flower basket tools at reinforcing positions at two ends of the invar pipe through first clamping ends respectively; fixing a second clamping end of the basket fixture on the flat steel; a group of flower basket tools are added in the middle of the invar pipe in the length direction; the distance between the invar tube and the flat steel is adjusted by screwing the special nut of the basket fixture, and the basket fixtures at two ends are adjusted first and then the basket fixture in the middle is adjusted, so that the distance between the invar tube and the flat steel meets the installation requirement.
Preferably, before the flower basket tool is installed, the corner cutting of each invar pipe is carried out according to the GTT requirement so as to guarantee that the requirement of a subsequent welding wrap angle is met.
Preferably, the length of the internal thread in the special nut is greater than the sum of the lengths of the external threads on the studs of the first clamping end and the second clamping end.
Preferably, the length of the invar tube between two adjacent sets of the flower basket fixture does not exceed a predetermined distance.
Preferably, the predetermined distance is 0.8-2 m.
Preferably, when installing the invar tubes, the spacing between two adjacent invar tubes is first adjusted to meet the specified requirements before adjusting the distance between each invar tube and the flat steel.
Compared with the prior art, the invention has the beneficial effects that:
1. in the production of a real ship, the invar pipe of the LNG ship cargo tank is manually carried and fixed, and the method fixes the flower basket and adds a reinforcing part with the invar pipe before the invar pipe is mounted, so that the flower basket can be used as an effective stress point, and the carrying of workers and the primary fixing of the invar pipe on the anchoring flat steel are facilitated;
2. the length of the flower basket used in the method can be adjusted by screwing the special nut, so that the problem of accurately adjusting the height of the invar tube is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic overall structure diagram of the flower basket fixture in the embodiment of the invention.
FIG. 2 is a schematic diagram of the method application of the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1-2, the present embodiment provides a method for implementing accurate installation of invar tubes in a cargo tank of an LNG ship, where the method is based on a basket fixture, and the basket fixture includes: the clamping device comprises a first clamping end 1, a second clamping end 2 and a special nut 3, wherein the first clamping end 1 and the second clamping end 2 are respectively provided with a clamping opening 6 with a rectangular cross section and a stud 4 protruding outside, a threaded hole is formed in the clamping opening 6, a screw 5 is connected with the threaded hole in a threaded manner, the first clamping end 1 and the clamping opening 6 of the second clamping section are arranged in a back-to-back manner, one end of the special nut 3 is connected with the stud 4 of the first clamping end 1, and the other end of the special nut 3 is connected with the stud 4 of the second clamping end 2; the method comprises the following steps: installing a flower basket tool at the reinforcing positions at the two ends of the invar pipe 7 through the first clamping ends 1 respectively; fixing a second clamping end 2 of the flower basket tool on a flat steel 8; a group of flower basket tools are added in the middle of the invar tube 7 in the length direction; the distance between the invar tube 7 and the flat steel 8 is adjusted by screwing the special nut 3 of the basket fixture, and the basket fixture at the two ends is adjusted first and then the basket fixture in the middle is adjusted, so that the distance between the invar tube 7 and the flat steel 8 meets the installation requirement.
Before the flower basket tool is installed, 7 corners of each invar pipe are cut according to GTT requirements so as to guarantee that the requirements of subsequent welding wrap angles are met.
The length of the internal thread in the special nut 3 is larger than the sum of the lengths of the external threads on the stud 4 of the first clamping end 1 and the second clamping end 2.
The length of the invar tube 7 between two adjacent sets of the flower basket fixtures is not more than a preset distance.
The predetermined distance is 0.8-2 m.
When the invar tubes 7 are installed, the distance between two adjacent invar tubes 7 is adjusted to meet the specified requirements before the distance between each invar tube 7 and the flat steel 8 is adjusted.
In another embodiment, a method is disclosed, the method comprising the steps of:
1. before installation, cutting corners of each invar pipe according to GTT requirements so as to ensure the requirements of subsequent welding wrap angles;
2. 2 flower baskets are arranged in advance at the reinforcing position of each end of the invar tubes, screws on the flower baskets are screwed, and 4 flower baskets are arranged in advance on each invar tube;
3. lifting the invar tube to be close to the installation position, controlling the gap of the invar tube, fixing the other end of the flower basket on the flat steel, and simultaneously screwing the screw down, thereby completing the preassembly of the invar tube;
4. a group of flower baskets are added in the middle of each invar tube, so that the total number of the flower baskets of each invar tube is 6 (the flower baskets can not be added in the short invar tubes with special ends). The space between the invar tubes and the lapping distance between the invar tubes and the flat steel are integrally adjusted to meet the GTT requirement;
5. the height of the invar tube is adjusted by screwing the special nut of the flower basket from two ends to the middle of the adjustment principle, so that the height of the invar tube meets the standard requirement.
The method not only effectively reduces the installation difficulty of the invar pipe of the liquid cargo tank of the LNG ship and improves the installation efficiency of the invar pipe of the liquid cargo tank of the LNG ship, but also greatly improves the installation precision of the invar pipe.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.
Claims (6)
1. The method for realizing accurate installation of the invar tubes of the liquid cargo tank of the LNG ship is characterized by being based on a basket fixture, wherein the basket fixture comprises:
the clamping device comprises a first clamping end (1), a second clamping end (2) and a special nut (3), wherein the first clamping end (1) and the second clamping end (2) are respectively provided with a clamping opening (6) with a rectangular cross section and a stud (4) protruding outside, a threaded hole is formed in each clamping opening (6), a screw (5) is connected to each threaded hole in a threaded mode, the first clamping end (1) and the clamping opening (6) of the second clamping section are arranged in a back-to-back mode, one end of the special nut (3) is connected with the stud (4) of the first clamping end (1), and the other end of the special nut (3) is connected with the stud (4) of the second clamping end (2);
the method comprises the following steps:
installing a flower basket tool at the reinforcing positions at the two ends of the invar tube (7) through the first clamping ends (1) respectively;
fixing a second clamping end (2) of the flower basket tool on a flat steel (8);
a group of flower basket tools are added in the middle of the invar tube (7) in the length direction;
the distance between the invar tube (7) and the flat steel (8) is adjusted by screwing the special nut (3) of the basket fixture, and the basket fixtures at the two ends are adjusted first and then the middle basket fixture is adjusted, so that the distance between the invar tube (7) and the flat steel (8) meets the installation requirement.
2. The method for realizing the precise installation of the invar tubes of the LNG ship cargo tank according to claim 1, wherein before the installation of the flower basket tool, each invar tube (7) is chamfered according to GTT requirements so as to ensure that the subsequent welding wrap angle requirements are met.
3. Method for realizing accurate installation of invar tubes for cargo tanks of LNG ships according to claim 1, characterized in that the length of the internal thread in the special nut (3) is greater than the sum of the lengths of the external thread on the studs (4) of the first and second clamping ends (1, 2).
4. Method for achieving accurate installation of invar tubes for cargo tanks of LNG ships according to claim 1, characterized in that the length of the invar tubes (7) between two adjacent sets of the flower basket fixture does not exceed a predetermined distance.
5. Method for achieving accurate installation of invar tubes for cargo tanks of LNG ships according to claim 4, characterized in that the predetermined distance is 0.8-2 m.
6. Method for achieving an accurate installation of invar tubes for cargo tanks of LNG ships according to claim 1, characterized in that when installing the invar tubes (7), the distance between two adjacent invar tubes (7) is first adjusted to meet the specified requirements before adjusting the distance between each invar tube (7) and the flat steel (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080283.4A CN110877678A (en) | 2019-11-07 | 2019-11-07 | Method for realizing accurate installation of invar pipe of liquid cargo tank of LNG ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080283.4A CN110877678A (en) | 2019-11-07 | 2019-11-07 | Method for realizing accurate installation of invar pipe of liquid cargo tank of LNG ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110877678A true CN110877678A (en) | 2020-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911080283.4A Pending CN110877678A (en) | 2019-11-07 | 2019-11-07 | Method for realizing accurate installation of invar pipe of liquid cargo tank of LNG ship |
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| CN (1) | CN110877678A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113664436A (en) * | 2021-06-30 | 2021-11-19 | 沪东中华造船(集团)有限公司 | Welding deformation prevention method for low-position toggle plate of liquid cargo tank of LNG ship |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201679828U (en) * | 2010-03-20 | 2010-12-22 | 蔡建忠 | Novel turnbuckle |
| CN102489919A (en) * | 2011-11-29 | 2012-06-13 | 沪东中华造船(集团)有限公司 | Method for installing and adjusting trihedral wing plate of LNG (liquefied natural gas) carrier containment system |
| CN202356818U (en) * | 2011-11-29 | 2012-08-01 | 沪东中华造船(集团)有限公司 | Trihedron mounting and adjusting tool set of LNG (Liquefied Natural Gas) ship containment system |
| CN208578953U (en) * | 2018-07-05 | 2019-03-05 | 昆山吉海实业公司 | Turnbuckle take-up |
-
2019
- 2019-11-07 CN CN201911080283.4A patent/CN110877678A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201679828U (en) * | 2010-03-20 | 2010-12-22 | 蔡建忠 | Novel turnbuckle |
| CN102489919A (en) * | 2011-11-29 | 2012-06-13 | 沪东中华造船(集团)有限公司 | Method for installing and adjusting trihedral wing plate of LNG (liquefied natural gas) carrier containment system |
| CN202356818U (en) * | 2011-11-29 | 2012-08-01 | 沪东中华造船(集团)有限公司 | Trihedron mounting and adjusting tool set of LNG (Liquefied Natural Gas) ship containment system |
| CN208578953U (en) * | 2018-07-05 | 2019-03-05 | 昆山吉海实业公司 | Turnbuckle take-up |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113664436A (en) * | 2021-06-30 | 2021-11-19 | 沪东中华造船(集团)有限公司 | Welding deformation prevention method for low-position toggle plate of liquid cargo tank of LNG ship |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200313 |