A construction technology for closing annular segmented buildings in cargo holds of ships

Abstract

The present application discloses a construction process for closing annular segmented buildings of cargo holds of ships, which is applied in the field of ships. The process comprises the following steps: assembling cargo hold segments of bulk carriers into annular segments on an assembly platform next to a dock; then installing temporary auxiliary closing tooling on the bottom plate and top of the closing end of the cargo hold segments, and positioning the cargo hold segments for hoisting and assembly; finally, hoisting the cargo hold segments to the closing platform using the dock to close the cargo hold segments, wherein the temporary auxiliary closing tooling plays a role in strengthening the hoisting and preventing the cargo hold segments from being deformed during the closing, so that the segments of the same ring of the main hull of the cargo hold are assembled into annular segments on the assembly platform for closing, thereby reducing the number of closing hoisting times in the dock, shortening the dock closing time, and saving dock resources.

Description

Technical Field

[0001] The present application relates to the field of ships, and in particular to a construction process for closing annular segmented buildings in cargo holds of ships. Background Art

[0002] The dock hoisting and closing method for medium and large bulk carriers at home and abroad is generally adopted: the front and rear sections of the double bottom are first assembled in pairs, and then hoisted and closed in the dock; the front and rear sections of the hopper tanks are first assembled in pairs, and then hoisted and closed in the dock; the front and rear sections of the topside tanks are first assembled in pairs, and then hoisted and closed in the dock; the transverse bulkhead sections are hoisted and closed separately in the dock, and the middle deck sections are hoisted and closed separately in the dock. This mode takes up a lot of dock use cycles. How to shorten the dock construction and closing cycle, thereby increasing the number of ships delivered annually, is the direction that all shipyards are working hard to study.

[0003] Given the limited number of docks, shortening the dock construction and assembly cycle means an increase in the number of ships that can be launched from the shipyard within a year, thereby shortening the entire ship construction cycle and increasing the annual number of ships delivered by the shipyard. At the same time, it reduces the financing pressure on ship companies and enhances their competitiveness.

[0004] Therefore, it is necessary to develop a closure process that can shorten the closure period of dock construction. Summary of the invention

[0005] The purpose of this application is to provide a process for shortening the dock construction closing period. Compared with the prior art, a construction process for closing the annular segmented building of a ship's cargo hold is provided. The specific process flow is as follows:

[0006] S1, assemble the cargo hold sections of the bulk carrier into ring sections on the assembly platform next to the dock;

[0007] S2, install temporary auxiliary closing fixtures on the bottom plate and top of the closing end of the cargo hold section, and position the lifting assembly of the hold section;

[0008] S3, finally use the dock to hoist to the closing platform to close this cargo hold section, and the temporary auxiliary closing tooling plays a role in hoisting reinforcement and prevention of hoisting deformation during closing.

[0009] The sections of the same ring of the main hull of the cargo hold are assembled into ring-shaped sections on the assembly platform and then closed, which reduces the number of closing and hoisting times in the dock, shortens the dock closing time, and saves dock resources.

[0010] The optional cargo hold sections include double bottom sections, hopper tank sections, corrugated bulkhead sections and intermediate deck sections.

[0011] Optionally, the temporary auxiliary closing tooling in step S2 includes a horizontal girder and a positioning column, the horizontal girder is installed at the closing end at the top of the cargo hold section, a pair of installation grooves are opened on the bottom plate of the cargo hold section, threaded rings are embedded and installed in the installation grooves, the positioning columns are threadedly connected to the threaded rings, an auxiliary positioner is installed in the positioning column, the auxiliary positioner includes a shell, a hot melt adhesive layer is laid on the outer wall of the shell, a permanent magnet ring is installed at the bottom end of the shell, a laser emitting tube is installed in the shell, and an explosion-proof lens matching the laser emitting tube is fixedly connected to the middle of the permanent magnet ring. The closing work is assisted by the temporary auxiliary closing tooling to prevent welding deformation; when the dock hoisting closes this annular section, the temporary auxiliary closing tooling also plays a role in strengthening the hoisting and preventing hoisting deformation.

[0012] Optionally, the closing platform in step S3 includes multiple pairs of support frames, the support frames include fixed frames, electric guide rails are installed on the top of the fixed frames, auxiliary support beams are connected between the movable ends of the multiple electric guide rails, connecting rods are connected between the bottom ends of a pair of support frames, the middle part of the connecting rods is fixedly connected to a positioning seat, multiple plug-ins that are evenly distributed and match the positioning columns are plugged into the positioning seat, multiple heating devices that match the plug-ins are installed in the positioning seat, the heating devices include water heating rings that are sleeved on the outside of the plug-ins, and electric heating plates are installed on the top of the water heating rings. When auxiliary closing is performed through the closing platform, the positioning columns at the bottom can be quickly removed after the closing is completed, which facilitates the separation of the closed sections from the closing platform and eliminates the subsequent work of disassembling the positioning columns. The closing platform cooperates with the auxiliary positioner to ensure accurate lifting and positioning.

[0013] Optionally, the threaded ring is made of a high melting point resin, and the top of the positioning column is provided with an annular groove matching the threaded ring.

[0014] Optionally, a plurality of receiving holes matching the inserting tube are provided on the positioning seat, a slot matching the inserting tube is provided on the receiving hole, and an electromagnet is installed at the bottom end of the receiving hole.

[0015] Optionally, the positioning columns are made of seamless steel pipes with a diameter greater than 400 mm, and the horizontal girders are I-beams with a web height greater than 1000 mm, a panel width greater than 400 mm, and a plate thickness greater than 16 mm.

[0016] Optionally, a heat exchange ring matching the electric heating plate is fixedly connected to the top of the insert tube, the positioning seat is made of a heat insulating material, and the insert tube is made of a heat conductive material.

[0017] Optionally, a control system is also included, which includes a controller installed on a support frame, a laser receiving sensor matching the laser emitting tube is installed at the bottom end of the accommodating hole, and the electric guide rail, the laser receiving sensor and the heating device are all electrically connected to the controller.

[0018] The specific use of temporary auxiliary closing tooling is:

[0019] S1, when in use, multiple segments are matched with the positioning seats by hoisting and then closed;

[0020] S2, after the closing welding is completed, the positioning column can be heated in stages by the heating equipment in the positioning seat to separate the positioning column from the ship section;

[0021] S3, in the process of separating the auxiliary positioner, the water heating ring is first used to work to soften the hot melt adhesive layer, and then the electromagnet is turned on to make the auxiliary positioner as a whole sink into the receiving hole under the interaction between the permanent magnet ring and the electromagnet;

[0022] S4, then turning on the electric heating plate to heat the threaded ring until it melts, thereby separating the positioning column from the ship section;

[0023] S5, finally use the lifting equipment to move the assembled ship sections, thus completing the positioning release.

[0024] Compared with the prior art, the advantages of this application are:

[0025] (1) The sections of the cargo hold main hull in the same ring are assembled into ring sections on the assembly platform and then assembled, which reduces the number of assembly and hoisting times in the dock, shortens the dock assembly time, and saves dock resources.

[0026] (2) The temporary auxiliary closing tooling includes a horizontal girder and a positioning column. The horizontal girder is installed at the closing end of the top of the cargo hold section. A pair of installation grooves are opened on the bottom plate of the cargo hold section. A threaded ring is embedded and installed in the installation groove. The positioning column is threadedly connected with the threaded ring. An auxiliary positioner is installed in the positioning column. The auxiliary positioner includes a shell. A hot melt adhesive layer is laid on the outer wall of the shell. A permanent magnet ring is installed at the bottom of the shell. A laser emitting tube is installed in the shell. An explosion-proof lens matching the laser emitting tube is fixedly connected to the middle of the permanent magnet ring. The temporary auxiliary closing tooling assists the closing work to prevent welding deformation. When the dock hoisting closes this annular section, the temporary auxiliary closing tooling also plays a role in strengthening the hoisting and preventing hoisting deformation.

[0027] (3) The closing platform includes a plurality of pairs of support frames, the support frames include a fixed frame, an electric guide rail is installed at the top of the fixed frame, and an auxiliary support beam is connected between the movable ends of the plurality of electric guide rails. A connecting rod is connected between the bottom ends of a pair of support frames, and a positioning seat is fixedly connected to the middle of the connecting rod. A plurality of plug-ins that are evenly distributed and matched with the positioning columns are inserted into the positioning seat, and a plurality of heating devices that match the plug-ins are installed in the positioning seat. The heating devices include a water heating ring that is sleeved on the outside of the plug-in tube, and an electric heating plate is installed on the top of the water heating ring. When auxiliary closing is performed through the closing platform, the positioning column at the bottom can be quickly disassembled after the closing is completed, which is convenient for separating the closed sections from the closing platform and eliminating the subsequent work of disassembling the positioning columns. In addition, the closing platform cooperates with the auxiliary positioner to ensure accurate lifting positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a front perspective view of the cargo hold section after folding in this application;

[0029] Figure 2 This is a bottom perspective view of the cargo hold section after folding in this application;

[0030] Figure 3 A three-dimensional diagram of the positioning column of this application;

[0031] Figure 4 This is a front view of the folding platform of the present application when it is working;

[0032] Figure 5 A three-dimensional diagram of the positioning seat of this application;

[0033] Figure 6 A partial cross-sectional view of the positioning seat of the present application;

[0034] Figure 7 This is a schematic diagram of a portion of the structure of the threaded ring after melting of the present application;

[0035] Figure 8 This is a flow chart of the use of the folding platform for this application.

[0036] Description of the numbers in the figure:

[0037] 1 horizontal girder, 2 positioning column, 3 auxiliary positioner, 301 shell, 302 hot melt adhesive layer, 303 permanent magnet ring, 304 laser emitting tube, 4 support frame, 401 fixed frame, 402 electric guide rail, 403 auxiliary support beam, 5 connecting rod, 6 positioning seat, 7 heating equipment, 701 water heating ring, 702 electric heating plate. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0039] Embodiment 1:

[0040] This application discloses a construction process for closing annular segmented buildings in cargo holds of ships. Figure 1-3 , a construction process for closing annular segmented buildings of cargo holds of ships, the specific process flow is as follows:

[0041] S1, assemble the cargo hold sections of the bulk carrier into annular sections on the assembly platform beside the dock. The cargo hold sections include double bottom sections, hopper tank sections, corrugated bulkhead sections and middle deck sections;

[0042] S2, install temporary auxiliary closing fixtures on the bottom plate and top of the closing end of the cargo hold section, and position the lifting assembly of the hold section;

[0043] S3, finally use the dock to hoist to the closing platform to close this cargo hold section, and the temporary auxiliary closing tooling plays a role in hoisting reinforcement and prevention of hoisting deformation during closing.

[0044] The main hull sections of bulk carriers are first assembled on the assembly platform, and the closing end face data of each ring section is measured by total station. The closing end data of all the ring sections of the main hull are mastered before closing, so that the accuracy of the main hull can be accurately controlled;

[0045] After the overall structure is divided into ring sections, the pipe and iron outfitting of the entire ring section can be welded in place, shortening the installation time of dock outfitting parts;

[0046] After the assembly is divided into circular sections, the length of the joint in the dock will be reduced by more than 1 / 3, and the man-hours for welding, repairing and painting in the dock will be greatly reduced;

[0047] The overall lifting weight of the annular section is controlled below 700T, and can be safely lifted using an 800T gantry crane; the addition of temporary auxiliary closing tooling at the bow and stern ends of the annular section can effectively control the section accuracy and lifting rigidity; it can effectively shorten the dock / slipway cycle and increase the annual number of ships delivered by the shipyard.

[0048] The temporary auxiliary closing tooling in step S2 includes a horizontal girder 1 and a positioning column 2. The positioning column is made of a seamless steel pipe with a diameter greater than 400 mm. The horizontal girder is an I-beam with a web height greater than 1000 mm, a panel width greater than 400 mm, and a plate thickness greater than 16 mm. Optionally, after the closing process is completed, the parts extending out of the cargo hold segment at both ends of the horizontal girder 1 can be cut off, and a surface deck can be laid between multiple horizontal girder 1.

[0049] See also Figure 3 and Figure 7 The horizontal girder 1 is installed at the closed end of the top of the cargo hold segment. A pair of installation grooves are provided on the bottom plate of the cargo hold segment. A threaded ring is embedded in the installation groove. The positioning column 2 is threadedly connected with the threaded ring. The threaded ring is made of a high melting point resin with a melting point of 300 degrees Celsius. The top of the positioning column 2 is provided with an annular groove matching the threaded ring.

[0050] See also Figure 6 An auxiliary positioner 3 is installed in the positioning column 2, and the auxiliary positioner 3 includes a shell 301. A hot melt adhesive layer 302 is laid on the outer wall of the shell 301. The hot melt adhesive layer 302 is composed of a low melting point resin adhesive layer, and the melting point of the hot melt adhesive layer 302 is 150 degrees Celsius. A permanent magnet ring 303 is installed at the bottom end of the shell 301, and a laser emitting tube 304 is installed in the shell 301. An explosion-proof lens matching the laser emitting tube 304 is fixedly connected to the middle part of the permanent magnet ring 303. The closing work is assisted by a temporary auxiliary closing tool to prevent welding deformation; when the dock hoisting closes this annular segment, the temporary auxiliary closing tool also plays a role in strengthening the hoisting and preventing hoisting deformation.

[0051] See also Figure 4-6 The closing platform in step S3 includes multiple pairs of support frames 4, the support frames 4 include fixed frames 401, an electric guide rail 402 is installed on the top of the fixed frame 401, and auxiliary support beams 403 are connected between the movable ends of multiple electric guide rails 402. A connecting rod 5 is connected between the bottom ends of a pair of support frames 4, and a positioning seat 6 is fixedly connected to the middle of the connecting rod 5. A plurality of evenly distributed inserts that match the positioning columns 2 are inserted on the positioning seat 6, and a heat exchange ring that matches the electric heating plate 702 is fixedly connected to the top of the insert. The positioning seat 6 is made of heat insulating material, and the insert is made of heat conductive material.

[0052] The positioning seat 6 is provided with a plurality of receiving holes matching the insert tube, the receiving holes are provided with slots matching the insert tube, and an electromagnet is installed at the bottom of the receiving holes. A plurality of heating devices 7 matching the insert tube are installed in the positioning seat 6, and the heating devices 7 include a water heating ring 701 sleeved on the outside of the insert tube, and an electric heating plate 702 is installed on the top of the water heating ring 701. When the closing platform is used for auxiliary closing, the positioning column 2 at the bottom can be quickly disassembled after the closing is completed, which is convenient for separating the closed sections from the closing platform, and eliminating the work of disassembling the positioning column 2 later. The closing platform cooperates with the auxiliary positioner to ensure accurate hoisting positioning.

[0053] It also includes a control system, which includes a controller installed on the support frame 4, a laser receiving sensor matching the laser emitting tube 304 is installed at the bottom end of the receiving hole, the electric guide rail 402, the laser receiving sensor and the heating device 7 are all electrically connected to the controller, and during the lifting of the cargo warehouse sections, the receiving hole on the positioning seat 6 is matched with the positioning column by matching the laser emitting tube 304 with the laser receiving sensor, so that when the cargo warehouse sections are placed on the positioning seat, the positioning column 2 can be accurately inserted into the receiving hole, and the receiving hole is a slotted hole type, ensuring that when the two cargo warehouse sections are closed, there is enough spacing before closing for positioning and adjustment.

[0054] The specific use of temporary auxiliary closing tooling is:

[0055] S1, when in use, multiple segments are matched with the positioning seats by hoisting and then closed;

[0056] S2, after the closing welding is completed, the positioning column 2 can be heated in stages by the heating device 7 in the positioning seat 6, so that the positioning column 2 is separated from the ship section by section;

[0057] S3, in the process of separating the auxiliary positioner 3, the water heating ring 701 is first used to heat the hot melt adhesive layer 302 to at least 150 degrees Celsius to soften it, and then the electromagnet is turned on to make the auxiliary positioner 3 as a whole sink into the receiving hole under the interaction between the permanent magnet ring 303 and the electromagnet;

[0058] S4, then turn on the electric heating plate 702, so that the threaded ring is heated to at least 300 degrees Celsius and melted, so that the positioning column 2 is separated from the ship segment, and the melted threaded ring flows into the annular groove at the top of the positioning column 2. After the electric heating plate 702 stops working, the cooled and solidified resin bonds the positioning column 2 to the positioning seat, ensuring that the positioning column 2 does not move when the cargo hold segment is hoisted;

[0059] S5, finally use the lifting equipment to move the assembled ship sections, thus completing the positioning release.

[0060] This solution enables the sections of the same ring of the cargo hold main hull to be assembled into ring sections on the assembly platform and then assembled, which reduces the number of assembly and hoisting times in the dock, shortens the dock assembly time, and saves dock resources.

[0061] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and its improved conception, which should be covered by the protection scope of the present application.

Claims

1. A construction process for closing annular segmented buildings in cargo holds of ships, It is characterized in that The specific process is: S1, assemble the cargo hold sections of the bulk carrier into ring sections on the assembly platform next to the dock; S2, install temporary auxiliary closing fixtures on the bottom plate and top of the closing end of the cargo hold section, and position the lifting assembly of the hold section; The temporary auxiliary closing tool comprises a horizontal girder (1) and a positioning column (2), wherein the horizontal girder (1) is installed at the closing end of the top of the cargo hold segment, a pair of installation grooves are provided on the bottom plate of the cargo hold segment, a threaded ring is embedded and installed in the installation groove, the threaded ring is made of a high melting point resin, the positioning column (2) is threadedly connected to the threaded ring, an auxiliary positioner (3) is installed in the positioning column (2), and the auxiliary positioner (3) comprises a shell (301), a hot melt adhesive layer (302) is laid on the outer wall of the shell (301), a permanent magnet ring (303) is installed at the bottom end of the shell (301), a laser emitting tube (304) is installed in the shell (301), and an explosion-proof lens matching the laser emitting tube (304) is fixedly connected to the middle of the permanent magnet ring (303); S3, finally use the dock to hoist to the closing platform to close this cargo hold section, and the temporary auxiliary closing tooling plays a role in hoisting reinforcement and preventing hoisting deformation during closing; The folding platform comprises a plurality of pairs of support frames (4), wherein the support frames (4) comprise a fixed frame (401), an electric guide rail (402) is installed at the top end of the fixed frame (401), an auxiliary support beam (403) is connected between the movable ends of the plurality of electric guide rails (402), a connecting rod (5) is connected between the bottom ends of a pair of the support frames (4), a positioning seat (6) is fixedly connected to the middle part of the connecting rod (5), a plurality of plug-in sleeves evenly distributed and matching with the positioning column (2) are inserted into the positioning seat (6), a plurality of heating devices (7) matching with the plug-in sleeves are installed in the positioning seat (6), the heating device (7) comprises a water heating ring (701) sleeved on the outside of the plug-in sleeve, an electric heating plate (702) is installed at the top end of the water heating ring (701), a plurality of receiving holes matching with the plug-in sleeves are provided on the positioning seat (6), a slot matching with the plug-in sleeve is provided on the receiving hole, and an electromagnet is installed at the bottom end of the receiving hole.

2. A construction process for closing annular segmented buildings for cargo holds of ships according to claim 1, It is characterized in that The cargo hold sections include double bottom sections, hopper tank sections, corrugated bulkhead sections and intermediate deck sections.

3. A construction process for closing annular segmented buildings for cargo holds of ships according to claim 1, It is characterized in that The top end of the positioning column (2) is provided with an annular groove matching the threaded ring.

4. A construction process for closing annular segmented buildings for cargo holds of ships according to claim 1, It is characterized in that The positioning column (2) is made of a seamless steel pipe with a diameter greater than 400 mm, and the horizontal girder (1) is an I-beam with a web height greater than 1000 mm, a panel width greater than 400 mm, and a plate thickness greater than 16 mm.

5. A construction process for closing annular segmented buildings for cargo holds of ships according to claim 1, It is characterized in that The top end of the insert is fixedly connected to a heat exchange ring matching the electric heating plate (702); the positioning seat (6) is made of a heat insulating material; and the insert is made of a heat conducting material.

6. A construction process for closing annular segmented buildings for cargo holds of ships according to claim 1, It is characterized in that A control system is provided, the control system comprising a controller mounted on a support frame (4), a laser receiving sensor matching a laser emitting tube (304) being mounted at the bottom end of the receiving hole, and the electric guide rail (402), the laser receiving sensor and the heating device (7) being electrically connected to the controller.

7. A construction process for closing annular segmented buildings for cargo holds of ships according to claim 1, It is characterized in that The specific method of using the temporary auxiliary closing tool is as follows: S1, when in use, multiple segments are matched with the positioning seats by hoisting and then closed; S2, after the closing welding is completed, the positioning column (2) can be heated in stages by the heating device (7) in the positioning seat (6), so that the positioning column (2) is separated from the ship section by section; S3, in the process of separating the auxiliary positioner (3), the water heating ring (701) is first used to soften the hot melt adhesive layer (302), and then the electromagnet is turned on to make the auxiliary positioner (3) as a whole sink into the receiving hole under the interaction between the permanent magnet ring and the electromagnet; S4, then turning on the electric heating plate (702) to heat the threaded ring until it melts, thereby separating the positioning column (2) from the ship section; S5, finally use the lifting equipment to move the assembled ship sections, thus completing the positioning release.

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