CN116513398A - Structural hanging ring installed in narrow area and construction method of narrow area - Google Patents

Structural hanging ring installed in narrow area and construction method of narrow area Download PDF

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Publication number
CN116513398A
CN116513398A CN202211474606.XA CN202211474606A CN116513398A CN 116513398 A CN116513398 A CN 116513398A CN 202211474606 A CN202211474606 A CN 202211474606A CN 116513398 A CN116513398 A CN 116513398A
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CN
China
Prior art keywords
lifting ring
structural
plate
shaped
ring
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CN202211474606.XA
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Chinese (zh)
Inventor
唐建成
叶兰英
马青云
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Hudong Zhonghua Shipbuilding Group Co Ltd
Shanghai Jiangnan Changxing Shipbuilding Co Ltd
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Hudong Zhonghua Shipbuilding Group Co Ltd
Shanghai Jiangnan Changxing Shipbuilding Co Ltd
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Filing date
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Application filed by Hudong Zhonghua Shipbuilding Group Co Ltd, Shanghai Jiangnan Changxing Shipbuilding Co Ltd filed Critical Hudong Zhonghua Shipbuilding Group Co Ltd
Priority to CN202211474606.XA priority Critical patent/CN116513398A/en
Publication of CN116513398A publication Critical patent/CN116513398A/en
Pending legal-status Critical Current

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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
    • B63B73/30—Moving or transporting modules or hull blocks to assembly sites, e.g. by rolling, lifting or floating
    • 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
    • B63B73/10—Building or assembling vessels from prefabricated hull blocks, i.e. complete hull cross-sections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Transportation (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The invention relates to a structural lifting ring arranged in a narrow area of a ship body, wherein the narrow area is a ship body section which is reversely built and is normally assembled, the ship body section is a ship bow section, a B-shaped lifting ring, a special C-shaped lifting ring and a D-shaped lifting ring are arranged on the ship bow section, the special C-shaped lifting ring is a structural lifting ring, the structural lifting ring is in a lifting ring shape reserved on a plate formed by the narrow area, the reserved lifting ring is integrally manufactured with a structural plate frame when the structure is sleeved, the ship bow section is reversely built, the ship bow section is completed by utilizing the combination of the B-shaped lifting ring, the special C-shaped lifting ring, the D-shaped lifting ring and a lifting hook, and the structural lifting ring is cut off after the ship body section is turned over; and also relates to a construction method of a narrow area. By designing the structural hanging ring, the structural hanging ring and the construction method not only avoid subsequent installation work of the hanging ring, but also reduce the workload of welding, improve the efficiency of installation and dismantling, and facilitate the cutting of the hanging ring after use.

Description

Structural hanging ring installed in narrow area and construction method of narrow area
Technical Field
The invention relates to ship construction, in particular to a structural hanging ring installed in a narrow area and a construction method of the narrow area.
Background
In ship construction, segments are generally constructed according to a drawing, the segments are assembled together to form a total segment, the total segment is carried to form a ship body structure, and various outfitting pieces are finally outfitted. For the segment construction and the total segment construction, the reverse construction is usually needed, then the lifting hook and the lifting ring of the lifting equipment are matched to realize turning and lifting, and finally the total segment construction is completed. In the process of turning over and lifting, the design of the lifting ring is very important.
In the prior art, the hanging ring is often welded and mounted on the segment later, the number and the mounting positions of the hanging ring are determined according to the shape and the gravity center position of the finished segment, and the hanging ring is welded to a proper position for turning over or hoisting operation. However, for some segments, the later addition of a sling, the selection of its position is problematic, and the turning over operation is difficult to accomplish effectively. For example, during ship construction, the bow sections are generally constructed in reverse and then the general population is normalized. As shown in FIG. 1, the stem section is mostly large in upper width and narrow in lower width. The subsection turning auxiliary hook is arranged in a narrow area at the lower part, and the construction is inconvenient when the hanging ring is installed and removed due to the narrow subsection lower opening. This requires changing the original working ideas to effectively build and hoist narrow areas such as the foreship sections.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a structural hanging ring arranged in a narrow area and a construction method of the narrow area. According to the invention, through redesigning the hanging ring, the subsequent installation work of the hanging ring is avoided, the workload of welding can be reduced, the efficiency of installation and dismantling is improved, and the hanging ring is more convenient to cut off.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a install at hull narrow and small regional structural rings, this narrow and small region is the hull segmentation of reverse construction and normal general group, the hull segmentation be the bow segmentation be equipped with B type rings, special C type rings and D type rings on the bow segmentation, special C type rings be structural rings, this structural rings is the rings shape of reserving on the narrow and small region constitution panel, the rings of reserving just completes with the integrated preparation of structure grillage when the structure cover material, will narrow and small region reverse construction accomplish, utilize B type rings, special C type rings and D type rings and lifting hook combination to accomplish narrow and small region's standing up, structural rings is in the hull segmentation stands up and cuts off after accomplishing.
In the structural hanging ring installed in a narrow area of a ship body, the ship body is divided into a ship bow section, the deck surface width of the ship bow section is large, the width of a narrow position of a lower opening is smaller than 1 meter, and the structure comprises rib plates, a middle fir truss, a platform plate assembly and an outer plate.
In the structural hanging ring arranged in a narrow area of a ship body, the B-shaped hanging ring is welded on a deck surface, two sides of the gravity center of the structure of the ship bow section are respectively provided with the B-shaped hanging ring, and the B-shaped hanging ring is welded at a hard structure position to avoid deformation.
In the structural lifting ring arranged in a narrow area of a ship body, the D-shaped lifting ring is used as a turning main hook to be welded at the end position of a ship bow section, the D-shaped lifting ring is welded at the end position of a deck surface, and the D-shaped lifting ring and the special C-shaped lifting ring are symmetrically distributed at two sides of the ship bow section in the structure center of gravity.
In the structural lifting ring installed in a narrow area of a ship body, the structural lifting ring comprises a lifting ring main plate and a lifting ring web plate, the lifting ring main plate and the connected structural plate have the same plate thickness, the lifting ring main plate and the structural plate frame are integrally manufactured, and the lifting ring web plate is welded on the lifting ring main plate.
In the structural lifting ring installed in a narrow area of a ship body, the aperture size of a web plate of the lifting ring is the same as that of a main plate of the lifting ring, and the circle centers of the holes are aligned.
The construction method of the narrow area is characterized in that the construction and hoisting method comprises the following steps:
the method comprises the steps of firstly, constructing a stem section, namely, taking a rib plate as a base surface, installing a middle truss and a platform plate assembly to form a rib plate middle group, wherein the platform plate assembly comprises a platform plate and an accessory part, turning over the rib plate middle group by 90 degrees, taking the platform plate as the base surface to install the accessory part, and installing an outer plate to form a complete stem section, wherein the stem section is in a reverse state;
secondly, arranging lifting rings, wherein two D-shaped lifting rings are arranged on a platform plate and used as main turning hooks, two B-shaped lifting rings are arranged on the other side of the gravity center and used as auxiliary turning hooks, a structural lifting ring reserved at the lower opening of a ship bow section is used as a special C-shaped lifting ring which is used as an auxiliary turning hook, the special C-shaped lifting ring is a structural lifting ring, the structural lifting ring is formed by integrating lifting rings with adjacent structures in advance, the structural lifting ring comprises a lifting ring main plate and a lifting ring web plate, the plate thickness of the lifting ring main plate is the same as that of a connected structural plate, the lifting ring main plate and the structural plate frame are integrally manufactured, the lifting ring web plate is welded on the lifting ring main plate, the aperture of the lifting ring web plate is the same as that of the lifting ring main plate, and the circle centers of the holes are aligned;
thirdly, the bow is turned over in a segmented mode, one hanging row of the gantry crane is connected with the D-shaped hanging ring, the other hanging row is connected with the special C-shaped hanging ring, the bow is slowly pulled up in a segmented mode, then the hanging row connected with the special C-shaped hanging ring is enabled to be motionless, the hanging row connected with the D-shaped hanging ring is pulled up continuously until the bow is lifted up in a segmented mode, the hanging row connected with the special C-shaped hanging ring is loosened, the loosened hanging row is connected to the B-shaped hanging ring, and the hanging row is pulled up to complete the segmented turning over of the bow;
fourthly, cutting the lifting rings, cutting the B-shaped lifting rings, the special C-shaped lifting rings and the D-shaped lifting rings respectively after the ship bow turns over in a segmented mode, polishing and smoothing the cutting positions after cutting, and supplementing paint.
In the method for constructing the narrow area, the middle fir truss is vertically fixed on a rib plate serving as a base surface on the ship bow segment, a plurality of platform plate assemblies are vertically connected between the middle fir truss and the rib plate, the middle fir truss and the platform plate assemblies form a rib plate middle group, and an outer plate is arranged outside the rib plate middle group.
In the construction method of the narrow area, further, the B-shaped hanging rings are fixed on the deck surface, two sides of the gravity center of the structure of the stem section are respectively provided with a B-shaped hanging ring, and the B-shaped hanging rings are welded at the hard gear position of the structure to avoid deformation; the D-shaped lifting ring is used as a turning main hook to be welded at the end position of the stem section, the D-shaped lifting ring is welded at the end position of the deck surface, and the D-shaped lifting ring and the special C-shaped lifting ring are symmetrically distributed at two sides of the stem section in the structure center of gravity.
Based on the technical scheme, the structural hanging ring in the narrow area and the construction method of the narrow area have the following technical advantages through practical application:
1. the structural lifting ring disclosed by the invention is characterized in that the lifting ring is sleeved with the structure in advance, and the redundant part is cut off after the sectional turning is completed, so that the lifting ring is prevented from being installed in a narrow area, the welding workload can be reduced, and the installation and dismantling efficiency is improved.
2. The ship bow is segmented as a typical narrow area, reverse construction is finished, operation is easy, a group of turning main hooks are arranged on a deck during reverse construction, a group of turning auxiliary hooks are arranged at the lower opening, and the main hooks and the auxiliary hooks are arranged at two sides of the gravity center. Because the center of gravity is near the stem, the secondary hooks need to be near the stem when installed. When turning over, a group of steel wire ropes are connected with the main hook, a group of steel wire ropes are connected with the structural hanging ring, the auxiliary hook is slowly put down after the segmented hanging, and then the steel wire ropes are connected with the auxiliary hook on the deck in a hook changing mode, so that the turning over of the bow segment is completed.
Drawings
Fig. 1 is a schematic view of the installation position of a lifting ring on a bow segment in the prior art.
FIG. 2 is a schematic view of the structural composition of a foreship section in an embodiment of the invention.
Figure 3 is a schematic structural view of the structural suspension ring of the present invention mounted in a small area of a hull.
Figure 4 is a schematic view of the invention in the reverse state of the structural suspension ring on the bow section.
Fig. 5 is a diagram of the invention in normal condition after turning over of the structural suspension ring on the bow segment.
Detailed Description
The following description of the present invention in detail, with reference to the accompanying drawings and specific embodiments, will further illustrate the structural suspension ring of the narrow region and the construction method of the narrow region, so as to make the structural composition and working manner thereof more clearly understood, but not limit the scope of protection of the present invention.
As shown in fig. 2, the small area is a special segment in the hull construction, such as a stem segment, which is constructed in reverse and assembled in normal. The ship body section is a ship bow section, the deck surface width of the ship bow section is large, the width of the narrow part of the lower opening is smaller than 1 meter, and the structure of the ship body section comprises rib plates, a middle fir truss, a platform plate assembly and an outer plate.
As shown in fig. 3, the present invention firstly designs a structural lifting ring installed in a narrow area of a ship body, the narrow area is a ship body section which is reversely built and is normally assembled, the ship body section is a ship bow section, a B-shaped lifting ring 7, a special C-shaped lifting ring 5 and a D-shaped lifting ring 6 are arranged on the ship bow section, the special C-shaped lifting ring 5 is a structural lifting ring, the structural lifting ring is in a shape of a lifting ring reserved on a plate formed in the narrow area, the reserved lifting ring is integrally manufactured with a structural plate frame when the structure is sleeved, the reverse construction of the narrow area is completed, the turning of the narrow area is completed by utilizing the combination of the B-shaped lifting ring 7, the special C-shaped lifting ring 5, the D-shaped lifting ring 6 and a lifting hook, and the structural lifting ring is cut off after the turning of the ship body section is completed.
The B-shaped hanging ring 7 is fixed on the deck surface, two sides of the gravity center of the structure of the ship bow section are respectively provided with a B-shaped hanging ring 7, and the B-shaped hanging ring 7 is welded at the hard stop position of the structure to avoid deformation; the D-shaped lifting ring 6 is used as a turning main hook to be welded at the end position of the stem section, the D-shaped lifting ring 6 is welded at the end position of the deck surface, and the D-shaped lifting ring 6 and the special C-shaped lifting ring 5 are symmetrically distributed at two sides of the stem section in the structure center of gravity.
In a specific structural design, the special C-shaped lifting ring 5 is designed into a structural lifting ring, the structure of the special C-shaped lifting ring comprises a lifting ring main board and a lifting ring web plate, the lifting ring main board and the connected structural board are the same in thickness, the lifting ring main board and the structural board frame are integrally manufactured, and the lifting ring web plate is welded on the lifting ring main board. The aperture size of the lifting ring web plate is the same as the aperture of the lifting ring main plate, and the circle centers of the holes are aligned.
The invention also relates to a method for constructing a small area, which is a stem section. As shown in fig. 1 and 2, the stem section is a funnel-shaped section with a wide upper part and a narrow lower part, the deck surface of the stem section is wide, the width of the narrow lower opening is less than 1 meter, and the structure comprises rib plates, a middle fir truss 2, a platform plate assembly and an outer plate 4. The construction and hoisting method comprises the following steps:
the first step, building a stem section, wherein a rib plate is taken as a base surface, a middle truss 2 and a platform plate assembly 3 are installed to form a rib plate middle group 1, the platform plate assembly comprises the platform plate 3 and accessory components, the rib plate middle group 1 is turned over for 90 degrees, the platform plate 3 is taken as the base surface to install accessory components, and an outer plate 4 is installed to form a complete stem section, so that the stem section is in a reverse state.
The second step, set up rings, be equipped with two D type rings 6 as standing up the main hook at the platform board, be equipped with two B type rings 7 as first standing up auxiliary hook at the opposite side of focus, be equipped with two purpose-made C type rings 5 as second standing up auxiliary hook at the lower mouth of stem segmentation, purpose-made C type rings 5 are structural rings, this structural rings is with rings and adjacent structure integration cover material in advance, this structural rings includes rings mainboard and rings web, the rings mainboard is the same with the plate thickness of continuous structural board, and is accomplished with rings mainboard and the integration of structural grillage, rings web welds on rings mainboard, rings web's aperture size is the same with rings mainboard's aperture, and the centre of a circle aligns.
Thirdly, the bow is turned over in a segmented mode, one hanging row of the gantry crane is connected with the D-shaped hanging ring 6, the other hanging row is connected with the special C-shaped hanging ring 5, the bow is slowly pulled up in a segmented mode, then the hanging row connected with the special C-shaped hanging ring 5 is enabled to be motionless, the hanging row connected with the D-shaped hanging ring 6 is pulled up until the bow is lifted up in a segmented mode, the hanging row connected with the special C-shaped hanging ring 5 is loosened, the loosened hanging row is connected to the B-shaped hanging ring 7, and the hanging row is pulled up to complete the bow turning over in a segmented mode.
Fourthly, cutting the lifting rings, cutting the B-shaped lifting rings 7, the special C-shaped lifting rings 5 and the D-shaped lifting rings 6 after the ship bow turns over in a segmented mode, polishing and smoothing the cutting positions after cutting, and supplementing paint.
In the method for constructing the narrow area, the middle fir truss is vertically fixed on a rib plate serving as a base surface on the ship bow segment, a plurality of platform plate assemblies are vertically connected between the middle fir truss and the rib plate, the middle fir truss 2 and the platform plate assemblies form a rib plate middle group 1, and an outer plate 4 is arranged outside the rib plate middle group 1.
In the construction method of the narrow area, further, the B-shaped hanging rings 7 are welded on the deck surface, two sides of the gravity center of the structure of the stem section are respectively provided with the B-shaped hanging rings 7, and the B-shaped hanging rings 7 are fixed at the hard position of the structure to avoid deformation. The D-shaped lifting ring 6 is used as a turning main hook to be fixed at the end position of the stem section, the D-shaped lifting ring 6 is welded at the end position of the deck surface, and the D-shaped lifting ring 6 and the special C-shaped lifting ring 5 are symmetrically distributed at two sides of the stem section in the structure center of gravity.
Example 1
This embodiment is exemplified by a bow section FG22C section, illustrating the application of the present invention in a narrow area structural sling, and methods of constructing and turning over the same. In particular, the stem section is a funnel-like section with a wide upper part and a narrow lower part, the deck surface is wide, the lower opening is very narrow, and the widest part of the lower opening is only 1 meter. The center of gravity of the segment is at the widest distance of only one rib position in the ship length direction, about 700 mm.
The space in the ship width direction at the center of gravity of the ship bow segment is only 718 mm, the space between the center of gravity and one rib position of the bow is only 322 mm, and the space is equal to the operation space of 161 mm on one side due to the separation of the center stringers. And because the segments are reversely built, the height of the segments is about 5.2 meters, and the construction can be realized only by setting up a scaffold when the turning auxiliary hooks are installed.
The process of constructing the stem section is as follows, the rib plates are taken as the base surface, the middle stringers and the platform plate component are installed, and rib plate middle groups are formed, see fig. 2; taking a platform plate as a base surface, and installing all components, wherein the rib plate middle group is required to turn over by 90 degrees, as shown in fig. 3; finally, the outer plate is installed to form a complete section. At this time, the whole segment is in a reverse state, and the whole segment needs to be turned over 180 degrees to reach a normal state. As shown in fig. 5, two D-shaped hanging rings are installed on the platform plate as main turning hooks, and two B-shaped hanging rings are installed on the other side of the gravity center as auxiliary turning hooks. At the lower opening of the section, the reserved structural hanging ring is used as a turning auxiliary hook. One hanging row of the gantry crane is connected with the D-shaped hanging ring, the other hanging row is connected with the special C-shaped hanging ring, the segmented lifting is slowly carried out, then the hanging row connected with the special C-shaped hanging ring is not moved, the hanging row connected with the D-shaped hanging ring is continuously pulled upwards until the segmented lifting is carried out, at the moment, the hanging row connected with the special C-shaped hanging ring is loosened, the hanging row is connected to the B-shaped hanging ring, and the segmented turning is completed.
And after the ship bow is turned over in a segmented manner, cutting off the hanging ring. Because the segments are welded on the structure, the welded parts need to be polished smoothly after the segments are cut off, and the paint of the segments can be destroyed during polishing, so that the paint needs to be replenished again.
Because conventional lifting rings need to be first blanked, cut, assembled and then welded on a structure. The structural lifting ring in the embodiment can be cut in advance in a numerical control mode, assembling and welding are not needed, so that the step of high-altitude operation can be omitted, the safety problem caused by high-altitude operation is avoided, and finally, the structural lifting ring is turned over to be normal when cut, and constructors can complete the work of cutting the lifting ring only on a flat ground. In addition, due to the extension of the stringers in the structural lifting ring, the damage to the structure in the process of cutting is smaller, the polishing and paint repairing areas are smaller, the loss of materials is reduced, and the workload of constructors is also reduced.
The above is, of course, only a limited implementation of a structural suspension ring to be installed in a confined area and of a method of constructing such a confined area, but other possible structural designs and operating procedures are included. In summary, the scope of the present invention also includes other variations and alternatives that will be apparent to those skilled in the art.

Claims (9)

1. The utility model provides a install at hull narrow and small regional structural rings, this narrow and small region is reverse construction and normal general group's hull segmentation, its characterized in that, the hull segmentation be the ship bow segmentation be equipped with B type rings, special C type rings and D type rings on the ship bow segmentation, special C type rings be structural rings, this structural rings is the rings shape of reserving on the narrow and small region constitution panel, the rings of reserving just completes with the integrated preparation of structure grillage when the structure trepanning, with narrow and small region reverse construction completion, utilize B type rings, special C type rings and D type rings and lifting hook combination to accomplish the upset of narrow and small region, structural rings cut off after the hull segmentation is stood up.
2. A structural suspension ring for mounting on a small area of a ship's hull according to claim 1 wherein said stem section has a deck surface width greater and a lower opening throat width less than 1 meter, and wherein the structure comprises ribs, a midspan truss, a platform plate assembly and an outer plate.
3. A structural suspension ring for mounting on a small area of a ship according to claim 2, wherein the B-shaped suspension rings are welded on the deck surface, and a B-shaped suspension ring is arranged on each side of the center of gravity of the structure of the bow section, and the B-shaped suspension rings are welded on the hard stop position of the structure to avoid deformation.
4. A structural lifting ring arranged in a narrow area of a ship body according to claim 2, wherein the D-shaped lifting ring is welded at the end position of a bow section as a turning main hook, the D-shaped lifting ring is welded at the end position of a deck surface, and the D-shaped lifting ring and the C-shaped lifting ring are symmetrically distributed at two sides of the bow section at the center of gravity of the structure.
5. The structural lifting ring installed in a narrow area of a ship body according to claim 1, wherein the structural lifting ring comprises a lifting ring main plate and a lifting ring web plate, the lifting ring main plate and the connected structural plate are the same in plate thickness, the lifting ring main plate and the structural plate frame are integrally manufactured, and the lifting ring web plate is welded on the lifting ring main plate.
6. A structural suspension ring for mounting on a small area of a hull according to claim 5 wherein the diameter of the suspension ring web is the same as the diameter of the suspension ring main plate and the center of the hole is aligned.
7. The construction method of the narrow area is characterized in that the construction and hoisting method comprises the following steps:
the method comprises the steps of firstly, constructing a stem section, namely, taking a rib plate as a base surface, installing a middle truss and a platform plate assembly to form a rib plate middle group, wherein the platform plate assembly comprises a platform plate and an accessory part, turning over the rib plate middle group by 90 degrees, taking the platform plate as the base surface to install the accessory part, and installing an outer plate to form a complete stem section, wherein the stem section is in a reverse state;
secondly, arranging a lifting ring, wherein the platform plate is provided with two D-shaped lifting rings serving as main turning hooks, the other side of the gravity center is provided with two B-shaped lifting rings serving as auxiliary turning hooks, the structural lifting ring reserved at the lower opening of the stem section is used as a special C-shaped lifting ring serving as auxiliary turning hooks, the special C-shaped lifting ring is a structural lifting ring, the structural lifting ring is formed by integrating a lifting ring with an adjacent structure in advance, the structural lifting ring comprises a lifting ring main plate and a lifting ring web plate, the plate thickness of the lifting ring main plate is the same as that of the connected structural plate, the lifting ring main plate and the structural plate frame are integrally manufactured, the lifting ring web plate is welded on the lifting ring main plate, the aperture of the lifting ring web plate is the same as that of the lifting ring main plate, and the circle centers of the holes are aligned;
thirdly, the bow is turned over in a segmented mode, one hanging row of the gantry crane is connected with the D-shaped hanging ring, the other hanging row is connected with the special C-shaped hanging ring, the bow is slowly pulled up in a segmented mode, then the hanging row connected with the special C-shaped hanging ring is enabled to be motionless, the hanging row connected with the D-shaped hanging ring is pulled up continuously until the bow is lifted up in a segmented mode, the hanging row connected with the special C-shaped hanging ring is loosened, the loosened hanging row is connected to the B-shaped hanging ring, and the hanging row is pulled up to complete the segmented turning over of the bow;
fourthly, cutting the lifting rings, cutting the B-shaped lifting rings, the special C-shaped lifting rings and the D-shaped lifting rings respectively after the ship bow turns over in a segmented mode, polishing and smoothing the cutting positions after cutting, and supplementing paint.
8. The method of claim 7, wherein the fir truss is vertically fixed to a rib plate as a base surface on the stem section, a plurality of platform plate assemblies are vertically connected between the fir truss and the rib plate, the fir truss and the platform plate assemblies form a rib plate middle group, and an outer plate is provided outside the rib plate middle group.
9. The method for constructing and hoisting the stem section according to claim 7, wherein the B-shaped hanging rings are fixed on the deck surface, and two sides of the center of gravity of the stem section are respectively provided with a B-shaped hanging ring, and the B-shaped hanging rings are fixed at the hard stop position of the structure to avoid deformation; the D-shaped lifting ring is used as a turning main hook to be fixed at the end position of the stem section, the D-shaped lifting ring is fixed at the end position of the deck surface, and the D-shaped lifting ring and the C-shaped lifting ring are symmetrically distributed at two sides of the stem section in the structure center of gravity.
CN202211474606.XA 2022-11-23 2022-11-23 Structural hanging ring installed in narrow area and construction method of narrow area Pending CN116513398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211474606.XA CN116513398A (en) 2022-11-23 2022-11-23 Structural hanging ring installed in narrow area and construction method of narrow area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211474606.XA CN116513398A (en) 2022-11-23 2022-11-23 Structural hanging ring installed in narrow area and construction method of narrow area

Publications (1)

Publication Number Publication Date
CN116513398A true CN116513398A (en) 2023-08-01

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Application Number Title Priority Date Filing Date
CN202211474606.XA Pending CN116513398A (en) 2022-11-23 2022-11-23 Structural hanging ring installed in narrow area and construction method of narrow area

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