CN112109858B - Mounting precision control process for support base plate of liquefied gas carrier deck liquid cargo system - Google Patents
Mounting precision control process for support base plate of liquefied gas carrier deck liquid cargo system Download PDFInfo
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- CN112109858B CN112109858B CN202011031317.3A CN202011031317A CN112109858B CN 112109858 B CN112109858 B CN 112109858B CN 202011031317 A CN202011031317 A CN 202011031317A CN 112109858 B CN112109858 B CN 112109858B
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- base plate
- deck
- support base
- liquid cargo
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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
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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Abstract
The invention provides a liquefied gas carrier deck liquid cargo system support base plate installation accuracy control process, which ensures the on-site installation accuracy by controlling the accuracy of a deck support base plate installation line; in the carrying and assembling stage, a total station is used for measuring a total section support base plate and a unit support, the support measurement data and the total section support base plate data are simulated and matched, the support base plate with larger simulation deviation is corrected in advance, and the alignment accuracy of the total section support base plate and the support is ensured; and in the carrying stage of the block, the relative position relation between the center of the block and the head and tail directions of the block is mainly controlled, so that the installation precision of the support base plate of the liquid cargo system on the deck of the liquefied gas carrier can be ensured. According to the invention, the deck support base plate is controlled and measured and corrected in advance at each stage in the process of being installed on the ship, so that the accuracy of the support web plate after being installed on the ship is ensured, and the problem of support base plate repair and cutting caused by dislocation with the base plate when the unit support of the deck liquid cargo system is hoisted and positioned is further avoided.
Description
Technical Field
The invention belongs to the field of precision control of liquefied gas ship deck liquid cargo systems, and particularly relates to a mounting precision control process of a support base plate of a liquefied gas ship deck liquid cargo system.
Background
The deck liquid cargo system is used as a core part of the liquefied gas carrier, the liquid cargo system support base plate is used as a transition part for butt joint of the liquid cargo system and the ship body, and the mounting precision of the support base plate directly influences the stress stability of the liquid cargo system to be connected, so that the alignment precision of the liquid cargo system support base plate and the liquid cargo system support is guaranteed to be the key work for mounting the liquid cargo system.
In the previous liquefied gas ship construction process, a deck support base plate is generally installed and welded according to a design installation drawing at a deck section construction stage, direct hoisting and loading are not confirmed for checking the installation precision of the base plate at each stage, and the deck base plate is trimmed and adjusted according to the actual dislocation quantity of a support and the base plate after a liquid cargo system support is hoisted and loaded on a ship. In the traditional method, the liquid cargo system support and the base plate are staggered more, so that a large number of base plates are repaired, cut and reworked.
However, the support of the liquid cargo system is hung and then found to be dislocated with the base plate, when the support base plate of the deck support is repaired and cut, the problem that the difficulty of the narrow control operation of the deck is high and low in efficiency is solved, meanwhile, the reverse side paint of the deck is damaged by high temperature in the repairing and cutting process of the base plate, the paint in the narrow space of the reverse side of the deck is polished and the paint is repaired more difficultly, the firing risk of flammable heat-insulating materials of the liquid tank is increased in the repairing and cutting process of the base plate and the reverse side paint.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide a liquefied gas carrier deck liquid cargo system support base plate installation accuracy control process, so that the liquefied gas carrier deck support base plate installation accuracy is improved, the situation that a liquid cargo system support is misplaced with a deck base plate during lifting is avoided, the reworking and repairing and cutting of the base plate is reduced, and the potential safety hazard caused by misplacing and repairing and cutting of the base plate is reduced.
In order to achieve the above objects and other related objects, the present invention provides a mounting accuracy control process for a bracket backing plate of a liquid cargo system on a deck of a liquefied gas carrier, comprising the steps of:
1) deck section building stage
The method comprises the following steps that a site construction unit makes mounting lines in the head-tail direction and the width direction of a base plate according to a support base plate mounting drawing to guide the mounting of the base plate, and a deck support base plate is positioned and mounted according to a deck base plate mounting line on a deck section on site;
2) deck section total assembly stage
After the deck section assembly is completed to form a total section, a precision manager is required to measure a total section deck support base plate and a liquid cargo system support by using a total station, then the measured data of the deck support base plate and the measured data of the liquid cargo system support are simulated and matched, the deck support base plate with a large data matching difference between the deck support base plate and the liquid cargo system support is corrected and adjusted, and the matching degree of the total section deck support base plate and the liquid cargo system support is ensured;
3) main section carrying stage
The central line straightness of the total section and the inspection line spacing of deck ribs of the total section are controlled in the total section carrying stage so as to ensure the relative position relation of support base plates of the total section and further avoid integral dislocation of the support of the liquid cargo system with the deck support base plates during lifting;
4) liquid cargo system support hoisting and loading ship
After the liquid cargo system support is hoisted and loaded onto a ship, the central line and the rib position line of the liquid cargo system support are respectively aligned with the central line and the rib position line of the ship, so that the liquid cargo system support and a deck support base plate can be accurately aligned, and further the base plate repairing and cutting adjustment caused by the dislocation of the liquid cargo system support and the deck support base plate is avoided.
Preferably, a 'deck base plate precision self-checking list' is drawn according to the mounting position of the deck support base plate in the step 1), and after the mounting and positioning of the support base plate are completed, the self-checking work is carried out on the mounting precision of the deck sectional base plate on site according to a table.
Preferably, after the subsection is completed in the step 1), a precision manager is required to utilize a total station to perform three-dimensional measurement on the installation precision of the base plate of the deck subsection, and the base plate of the deck support with large error checking amount is required to be corrected and modified on site in time. The installation precision of the deck support base plate in the segmentation stage is ensured.
As mentioned above, the novel split type round steel die casting process has the following beneficial effects: through the precision management and control to each stage of deck liquid cargo unit support backing plate, improve the matching degree of support backing plate installation and liquid cargo system support, avoid follow-up liquid cargo unit support hoist and mount dislocation condition with the support backing plate when fixing a position, nearly and avoided the deck support backing plate to repair the high temperature destruction of cutting the time to reverse side paint, the paint of the narrow and small space of deck reverse side is polished and is repaired the degree of difficulty and great relatively with the paint, repair cutting and reverse side paint at the backing plate and polish the in-process, strengthened the fire hazard that the insulation material was easily fired to the fluid reservoir.
Drawings
FIG. 1 is a diagram of a deck segment pad installation of an embodiment of the present invention;
FIG. 2 is a self-checklist of deck support dunnage according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating deck segment tie plate installation according to an embodiment of the present invention;
fig. 4 is a partial schematic view of the docking of the liquid cargo system bracket and the deck according to the embodiment of the invention.
Description of reference numerals: the structure comprises a deck section 1, a deck support base plate 2, a liquid cargo system support 3, a deck base plate installation line 4, a deck central line 5 and a deck rib inspection line 6.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or through an intermediate medium, or both elements may be interconnected. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1 to 4, the invention provides a mounting precision control process for a support base plate of a liquefied gas carrier deck liquid cargo system, which comprises the following steps:
1) deck section building stage: and the site construction unit makes mounting lines 4 in the head-tail direction and the width direction of the base plate according to the mounting drawing of the support base plate to guide the mounting of the base plate, and the site positions and mounts the deck support base plate 2 according to the mounting lines 4 of the deck base plate on the deck section 1.
And drawing a self-inspection list of the accuracy of the deck base plate according to the installation position of the deck support base plate 2, and after the installation and positioning of the deck support base plate 2 are completed, carrying out self-inspection on the installation accuracy of the deck sectional base plate on site according to a table.
After the deck section 1 is finished, a precision manager is required to utilize a total station to perform three-dimensional measurement on the installation precision of the deck section base plate, and the deck support base plate 2 with large error checking amount is required to be corrected and modified on site in time. The installation accuracy of the deck support base plate 2 in the subsection stage is ensured.
2) Deck section total assembly stage: after the deck section 1 is assembled to form a total section, a precision manager is required to measure a total section deck support base plate 2 and a liquid cargo system support 3 by using a total station, then the measured data of the deck support base plate 2 is simulated and matched with the measured data of the liquid cargo system support 3, the deck support base plate 2 with a large data matching difference with the liquid cargo system support 3 is corrected and adjusted, and the matching degree of the total section deck support base plate 2 and the liquid cargo system support 3 is ensured.
3) And a main section carrying stage: the straightness of the deck central line 5 and the hull central line of the block and the distance between the block deck rib inspection line 6 and the hull rib inspection line are controlled by the important and difficult points in the block carrying stage so as to ensure the relative position relation of the block and the support base plate 2 of the block and further avoid the integral dislocation of the liquid cargo system support 3 and the deck support base plate 2 during the hoisting.
4) After the liquid cargo system support is hoisted and loaded onto a ship, the central line and the rib position line of the liquid cargo system support are respectively aligned with the central line 5 and the rib position line 6 of the deck, so that the liquid cargo system support 3 and the deck support base plate 2 can be accurately aligned, and further the base plate repairing and cutting adjustment caused by the dislocation of the liquid cargo system support 3 and the deck support base plate 2 is avoided.
The Total Station, namely a Total Station type Electronic distance meter (Electronic Total Station), is a high-tech measuring instrument integrating light collection, mechanical measurement and electrical measurement, is a surveying and mapping instrument system integrating horizontal angle, vertical angle, distance measurement and altitude difference measurement functions, a user can select which type of Total Station to use according to actual conditions, and the invention adopts a Leica TS09 series Total Station.
As shown in fig. 3, in the deck section construction stage, a deck support base plate 2 is installed on the upper surface of a deck according to the requirements of a drawing, and then the deck section 1 is assembled and carried; measuring the data of the deck support base plate 2 and the data of the liquid cargo system support 3 by the total station, and performing simulation matching; and hoisting the deck block and the liquid cargo system unit bracket, wherein the liquid cargo system bracket 3 is butted with the corresponding deck bracket base plate 2. The specific implementation steps of the precision control are as follows:
1) the deck support base plate precision control in the segmentation stage comprises the following steps:
(a) control of deck support base plate installation line
And the site construction unit makes deck base plate mounting lines 4 in the head and tail directions and the width directions of the base plates according to the deck support base plate mounting drawing so as to guide the mounting of the deck support base plates 2, and a precision manager mainly checks the scribing precision of the mounting lines.
(b) Deck support base plate installation accuracy control
The deck support dunnage 2 is positioned and installed on site according to the deck dunnage installation line 4 on the deck section 1.
And after the installation and positioning of the deck support base plate 2 are finished, self-checking the installation precision of the base plate of the deck section on site according to a self-checking list of deck base plate precision.
And submitting a self-checking list to a precision manager after field self-checking is finished, wherein the precision manager is used for carrying out three-dimensional measurement on the installation precision of the cushion plate of the deck section by using the total station, and the cushion plate 2 of the deck support with larger error checking amount is required to be rectified and corrected on site in time. The installation precision of the deck support base plate 2 in the subsection stage is ensured.
2) Total section stage deck base plate precision control
After the deck section 1 is assembled to form a total section, a precision manager measures a total section deck support base plate 2 and a liquid cargo system support 3 by using a total station;
the measured data of the deck support base plate 2 and the measured data of the liquid cargo system support 3 are matched in a simulation mode, the support base plate 2 with larger data matching difference between the deck support base plate 2 and the liquid cargo system support 3 is fed back to be corrected and adjusted on site, and therefore the corresponding accuracy of the liquid cargo system support 3 and the deck support base plate 2 is guaranteed;
3) deck backing plate accuracy control during loading
The central line of the block and the block, the straightness of the central line of the hull, the block deck rib inspection line 6 and the spacing between the hull rib inspection lines are controlled by the important and difficult points in the block carrying stage so as to ensure the relative position relationship between the block and the deck support base plate 2 of the block;
after the liquid cargo system support 3 is hoisted and loaded onto a ship, the central line and the rib position line of the liquid cargo system support are respectively aligned with the central line 5 and the rib position line 6 of the deck, and the alignment precision of the liquid cargo system support 3 and the deck support base plate 2 can be controlled.
In the present invention, the underlay, the support underlay, is referred to as deck support underlay 2.
In conclusion, the installation precision control process of the base plate of the liquefied gas carrier deck liquid cargo system ensures the installation precision of the base plate of the deck sectional bracket by controlling the installation precision of the base plate of the deck sectional bracket in the sectional stage; in the deck assembling stage, data measurement and data simulation matching are carried out on a deck support base plate and a liquid cargo system support, so that the matching degree of the deck support base plate and the liquid cargo system support is ensured; carry on the stage and guarantee the deck backing plate relative position accuracy control of block and block through carrying on control to the block, and then guarantee the counterpoint precision of the whole backing plate of deck and liquid cargo system support, when avoiding follow-up liquid cargo unit support hoist and mount location with the dislocation condition of support backing plate, nearly and avoided the high temperature destruction to reverse side paint when deck support backing plate is repaiied and is cut, the paint of the narrow and small space of deck reverse side is polished and the paint is repaired the degree of difficulty and is great relatively, repair and cut at the backing plate and reverse side paint in-process of polishing, the conflagration hidden danger that the insulating material is easily fired to the fluid reservoir has been increase.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (3)
1. The utility model provides a liquefied gas ship deck liquid cargo system support backing plate installation accuracy management and control technology which characterized in that includes following step:
1) deck section building stage
The method comprises the following steps that a site construction unit makes mounting lines in the head-tail direction and the width direction of a base plate according to a support base plate mounting drawing to guide the mounting of the base plate, and a deck support base plate is positioned and mounted according to a deck base plate mounting line on a deck section on site;
2) deck section total assembly stage
After the deck section assembly is completed to form a total section, a precision manager is required to measure a total section deck support base plate and a liquid cargo system support by using a total station, then the measured data of the deck support base plate and the measured data of the liquid cargo system support are simulated and matched, the deck support base plate with a large data matching difference between the deck support base plate and the liquid cargo system support is corrected and adjusted, and the matching degree of the total section deck support base plate and the liquid cargo system support is ensured;
3) main section carrying stage
The central line straightness of the total section and the inspection line spacing of deck ribs of the total section are controlled in the total section carrying stage so as to ensure the relative position relation of support base plates of the total section and further avoid integral dislocation of the support of the liquid cargo system with the deck support base plates during lifting;
4) liquid cargo system support hoisting and loading ship
After the liquid cargo system support is hoisted and loaded onto a ship, the central line and the rib position line of the liquid cargo system support are respectively aligned with the central line and the rib position line of the ship, so that the liquid cargo system support and a deck support base plate can be accurately aligned, and further the base plate repairing and cutting adjustment caused by the dislocation of the liquid cargo system support and the deck support base plate is avoided.
2. The liquefied gas carrier deck liquid cargo system support base plate installation accuracy control process according to claim 1, characterized in that: and in the step 1), 'Deck liner plate precision self-inspection list' is drawn according to the installation position of the deck support liner plate, and after the installation and positioning of the deck support liner plate are completed, the installation precision of the deck sectional liner plate is subjected to self-inspection on site according to a table.
3. The liquefied gas carrier deck liquid cargo system support base plate installation accuracy control process according to claim 1, characterized in that: and (2) after the subsection is finished in the step 1), requiring a precision manager to utilize a total station to perform three-dimensional measurement on the installation precision of the base plate of the deck subsection, and requiring on-site timely correction and modification on the deck support base plate with large error checking amount, so as to ensure the installation precision of the deck support base plate in the subsection stage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011031317.3A CN112109858B (en) | 2020-09-27 | 2020-09-27 | Mounting precision control process for support base plate of liquefied gas carrier deck liquid cargo system |
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| CN202011031317.3A CN112109858B (en) | 2020-09-27 | 2020-09-27 | Mounting precision control process for support base plate of liquefied gas carrier deck liquid cargo system |
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| CN112109858B true CN112109858B (en) | 2021-06-08 |
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| CN114954835A (en) * | 2022-04-25 | 2022-08-30 | 沪东中华造船(集团)有限公司 | Installation method of LNG ship deck low-temperature pipe unit module |
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| CN108909938A (en) * | 2018-06-28 | 2018-11-30 | 广船国际有限公司 | A kind of sectional construction method |
| CN109080763A (en) * | 2018-05-31 | 2018-12-25 | 沪东中华造船(集团)有限公司 | A kind of LNG ship cargo tank pedestal is got ready and prepackage method |
| CN110027674A (en) * | 2019-05-16 | 2019-07-19 | 上海外高桥造船有限公司 | General section of shipbody shifts construction method |
| CN110550146A (en) * | 2019-09-29 | 2019-12-10 | 广船国际有限公司 | Construction method of ship garage or superstructure |
| EP3699077A1 (en) * | 2019-02-25 | 2020-08-26 | Roshdy G.S. Barsoum | Rapid response fabrication of marine vessel platforms |
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2020
- 2020-09-27 CN CN202011031317.3A patent/CN112109858B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109080763A (en) * | 2018-05-31 | 2018-12-25 | 沪东中华造船(集团)有限公司 | A kind of LNG ship cargo tank pedestal is got ready and prepackage method |
| CN108909938A (en) * | 2018-06-28 | 2018-11-30 | 广船国际有限公司 | A kind of sectional construction method |
| EP3699077A1 (en) * | 2019-02-25 | 2020-08-26 | Roshdy G.S. Barsoum | Rapid response fabrication of marine vessel platforms |
| CN110027674A (en) * | 2019-05-16 | 2019-07-19 | 上海外高桥造船有限公司 | General section of shipbody shifts construction method |
| CN110550146A (en) * | 2019-09-29 | 2019-12-10 | 广船国际有限公司 | Construction method of ship garage or superstructure |
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