Integral hoisting method for folding hatch cover of polar region multipurpose ship

Abstract

The invention discloses an integral hoisting method for folding hatch covers of a polar region multipurpose ship. The integral hoisting method comprises the following steps that a, two hatch covers are respectively hoisted and placed on a transportation bracket; b, the two hatch covers are transported to a general assembly site through a transport flat car; c, adjusting the positioning precision of the cabin cover; d, connecting pin shafts between the hatch covers are installed; e, installing a back folding preventing T-shaped tool; f, selecting a 400T gantry crane for hoisting; h, hatch cover lifting point positions are determined; i, determining a lifting point form; j, mounting a hoisting shackle and a steel wire rope; and k, hooking and integrally hoisting the slipway to fold. According to the integral hoisting method for the folding hatch cover of the polar region multi-purpose ship, the problem that a single folding hatch cover is hoisted for multiple times and the safety problem that the folding hatch cover is easily reversely folded during hoisting are solved, the hoisting and carrying efficiency is improved, the construction period is shortened, and the competitiveness is greatly improved.

Description

Technical Field

[0001] The invention relates to an integral hoisting method for a foldable hatch cover of a polar multipurpose ship. Background Art

[0002] At present, for pulp ships, container ships, bulk carriers and other ships with foldable hatch covers, manufacturers use single-piece transportation to the shipyard, and then the shipyard transports them to the loading area for single-piece lifting, loading and closing. One hatch area requires a gantry crane to lift at least twice to complete the lifting and installation of the hatch cover, which has low construction efficiency, occupies a long time of the gantry crane, and affects the slipway cycle. Summary of the invention

[0003] The purpose of the invention is to provide a method for integrally hoisting a foldable hatch cover of a polar multipurpose ship, which can double the hoisting and installation speed and reduce the construction difficulty.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a method for integrally hoisting a foldable hatch cover of a polar multi-purpose ship, comprising the following steps: a. The barge transporting the hatch cover is moored at the edge of the wharf, and the two halves of the hatch cover are hoisted to the brackets pre-placed at the wharf by the sea crane; b. Use a flatbed truck to transport the two half hatch covers to the assembly loading site; c. Adjust the positioning accuracy of the hatch cover and assemble the two half hatch covers together by relatively moving the brackets; d. Install the hatch cover rotation connecting pin; e. Install the anti-back folding T-shaped fixture between the two half-piece hatch covers, and place the anti-back folding T-shaped plate fixture at each longitudinal beam position, a total of 12 locations; f. Two lifting lugs are set on the outermost sides of each half hatch cover as the overall lifting points; g. Install shackles on the four lifting points on the left side of the integral hatch cover. Each shackle is connected to a wire rope and connected using the No. 1 hook of a 400T crane and the No. 2 hook of a 400T crane; h. Install shackles on the four lifting points on the right side of the integral hatch cover. Each shackle is connected to a wire rope and connected using the No. 3 hook of a 400T crane and a 100-ton lifting bar; i. Lift the No. 1 hook, No. 2 hook and No. 3 hook of the 400T crane at the same time, lift the hatch cover by 0.5 meters as a whole, and then suspend it for 5 minutes to check the extrusion stress status of the 12 anti-back folding T-type tooling; j. When the extrusion stress state of the anti-back folding T-type tooling is intact without extrusion, skewness or deformation, lift the two half hatch covers as a whole and hoist the hatch covers onto the ship structure for closing and installation; k. After the hatch cover is hoisted and installed as a whole and placed on the hull, perform sealing and welding operations, loosen the No. 1 hook, No. 2 hook and No. 3 hook of the 400T crane, take out the anti-back folding T-shaped tooling, and reserve it for subsequent hoisting of other folding hatch covers to complete the overall hoisting of the folding hatch cover.

[0005] In step b, the rated load of the flatbed truck is 200 tons, the maximum driving speed when empty is 10 km / h, the maximum driving speed when fully loaded is 5 km / h, and the size of the flatbed truck working platform is 15500 mm×5100 mm.

[0006] In the step f, there are 8 lifting ears.

[0007] In steps g and h, the safety load of the shackle is not less than 55 tons.

[0008] In step g, the length of the steel wire rope is ≥ 20 meters.

[0009] In the step h, the length of the steel wire rope is ≥ 12 meters.

[0010] The present invention discloses an integral hoisting method for a foldable hatch cover of a polar multipurpose ship, which solves the problem of multiple hoisting of a single foldable hatch cover and the safety problem of easy reverse folding of the foldable hatch cover during hoisting, improves hoisting and mounting efficiency, shortens construction period, and greatly improves competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the first half of a hatch cover of a polar multi-purpose ship according to the present invention, according to a method for integrally lifting a foldable hatch cover.

[0012] Figure 2 It is a schematic diagram of the second half of a hatch cover of a polar multi-purpose ship according to the present invention, according to a method for integrally lifting a foldable hatch cover.

[0013] Figure 3 The present invention is a schematic diagram of the overall assembly of a folding hatch cover of a polar multi-purpose ship according to a method for integrally hoisting a folding hatch cover.

[0014] Figure 4 The invention discloses a method for integrally lifting a foldable hatch cover for a polar multipurpose ship, in which two half hatch covers are connected to form an integral hatch cover.

[0015] Figure 5 The invention is a schematic diagram of the folding installation of an integral lifting platform of a polar multi-purpose ship foldable hatch cover integral lifting method.

[0016] Figure 6 The invention is a schematic diagram of a back-folding-proof T-shaped tooling for an integral hoisting method of a foldable hatch cover for a polar multi-purpose ship.

[0017] In the figure: 1. The first half of the hatch cover; 2. The second half of the hatch cover; 3. Wooden square piers; 4. Brackets; 5. No. 1 hook of 400-ton crane; 6. No. 2 hook of 400-ton crane; 7. No. 3 hook of 400-ton crane; 8. Wire rope; 9. Anti-back-bend T-shaped tooling; 10. Shackle; 11. Connecting pin; 12. Lifting lug; 13. 100-ton lifting bar; 14. Flatbed truck. DETAILED DESCRIPTION

[0018] like Figures 1 to 6As shown, the method for hoisting the foldable hatch cover of a polar multipurpose ship as a whole comprises the following steps: a. mooring the barge transporting the hatch cover at the edge of the dock, using a sea crane to hoist the first half hatch cover 1 and the second half hatch cover 2 to the bracket 4 pre-placed on the dock, placing a wooden square pier 3 on the bracket 4, placing the first half hatch cover 1 and the second half hatch cover 2 on the wooden square pier 3, the weight of the first half hatch cover 1 is 30 tons and the weight of the second half hatch cover 2 is 34 tons, the outer dimensions of the first half hatch cover 1 are: 5.8 meters * 22 meters * 1.0 meters; the outer dimensions of the second half hatch cover 2 are: The foldable hatch cover is: 6.5m*22m*1.0m, and the foldable hatch cover consists of the first half hatch cover 1, the second half hatch cover 2, the anti-back folding T-shaped tooling 9 and the connecting pin 11; b. Use a flatbed truck 14 to transport the first half hatch cover 1 and the second half hatch cover 2 to the assembly loading site. The flatbed truck has a rated load of about 200 tons and a deadweight of about 52 tons. The maximum driving speed when empty is 10 km / h, and the maximum driving speed when fully loaded is 5 km / h. The working platform size of the flatbed truck is 15500 mm×5100 mm, the lowest height of the platform descent (height from the ground) is about 1600 mm, and the platform lifting total The stroke is about 700 mm; c. Adjust the positioning accuracy of the hatch cover, and connect the first half hatch cover 1 and the second half hatch cover 2 together by relatively moving the bracket 4; d. Install the hatch cover rotation connecting pin 11; e. Install the anti-back folding T-shaped tooling 9 between the first half hatch cover 1 and the second half hatch cover 2, and place the anti-back folding T-shaped plate tooling 9 at each longitudinal beam position, (h*b*t, L): 55*60*15 mm, length 300 mm, a total of 12 places; f. Set two lifting ears 12 on the outermost sides of each half hatch cover as the overall lifting points, and the lifting ears 12 are 8 g. Install shackles 10 at the four lifting points on the left side of the integral hatch cover, each shackle is connected to a steel wire rope 8, the length of the steel wire rope is ≥ 20 meters, and is connected by the No. 1 hook 5 of a 400T crane and the No. 2 hook 6 of a 400T crane; h. Install shackles 10 at the four lifting points on the right side of the integral hatch cover, each shackle is connected to a steel wire rope 8, the length of the steel wire rope is ≥ 12 meters, and is connected by the No. 3 hook 7 of a 400T crane and a 100-ton lifting bar 13, and the safety load of the shackle 10 is not less than 55 tons; i. Lift the No. 1 hook 5 of a 400T crane, the No. 2 hook 6 of a 400T crane and the No. 3 hook 7 of a 400T crane at the same time, and lift the hatch cover as a whole by 0.After 5 meters, hover for 5 minutes to check the extrusion stress state of 12 anti-back fold T-type tooling 9. The maximum horizontal lifting weight of 400T crane is 380 tons. The maximum lifting weight of the hook head of 400T crane No. 1 hook 5 and 400T crane No. 2 hook 6 is 152 tons. The maximum lifting weight of the hook head of 400T crane No. 3 hook 7 is 190 tons, and the lifting height of the hook head is 55m; j. When the extrusion stress state of the anti-back fold T-type tooling 9 is intact without extrusion, skewness or deformation, lift the two half-piece hatch covers as a whole and hoist the hatch covers to the ship structure for closing and installation; k. After the cover is hoisted and installed as a whole and placed on the hull, the sealing welding operation is carried out, the No. 1 hook 5 of the 400T crane, the No. 2 hook 6 of the 400T crane and the No. 3 hook 7 of the 400T crane are loosened, and the anti-back folding T-shaped tooling 9 is taken out and reserved for subsequent hoisting of other folding hatch covers, and the hoisting of the folding hatch cover as a whole is completed. The method for hoisting the folding hatch cover as a whole for polar multi-purpose ships of the present invention solves the problem of multiple hoisting of a single folding hatch cover and the safety problem that the folding hatch cover is prone to reverse folding during hoisting, improves the hoisting and carrying efficiency, shortens the construction period, and greatly improves the competitiveness.

Claims

1. A method for integrally lifting a foldable hatch cover of a polar multipurpose ship, characterized in that: The following steps are involved: a. The barge transporting the hatch cover is moored at the edge of the wharf, and the two halves of the hatch cover are hoisted to the brackets pre-placed at the wharf by the sea crane; b. Use a flatbed truck to transport the two half hatch covers to the assembly loading site; c. Adjust the positioning accuracy of the hatch cover and assemble the two half hatch covers together by relatively moving the brackets; d. Install the hatch cover rotation connecting pin; e. Install the anti-back folding T-shaped fixture between the two half-piece hatch covers, and place the anti-back folding T-shaped plate fixture at each longitudinal beam position, a total of 12 locations; f. Two lifting lugs are set on the outermost sides of each half hatch cover as the overall lifting points; g. Install shackles on the four lifting points on the left side of the integral hatch cover. Each shackle is connected to a wire rope and connected using the No. 1 hook of a 400T crane and the No. 2 hook of a 400T crane; h. Install shackles on the four lifting points on the right side of the integral hatch cover. Each shackle is connected to a wire rope and connected using the No. 3 hook of a 400T crane and a 100-ton lifting bar; i. Lift the No. 1 hook, No. 2 hook and No. 3 hook of the 400T crane at the same time, lift the hatch cover by 0.5 meters as a whole, and then suspend it for 5 minutes to check the extrusion stress status of the 12 anti-back folding T-type tooling; j. When the extrusion stress state of the anti-back folding T-type tooling is intact without extrusion, skewness or deformation, lift the two half hatch covers as a whole and hoist the hatch covers onto the ship structure for closing and installation; k. After the hatch cover is hoisted and installed as a whole and placed on the hull, perform sealing and welding operations, loosen the No. 1 hook, No. 2 hook and No. 3 hook of the 400T crane, take out the anti-back folding T-shaped tooling, and reserve it for subsequent hoisting of other folding hatch covers to complete the overall hoisting of the folding hatch cover.

2. The method for integrally hoisting a foldable hatch cover of a polar multipurpose ship according to claim 1, characterized in that: In step b, the rated load of the flatbed truck is 200 tons, the maximum driving speed when empty is 10 km / h, the maximum driving speed when fully loaded is 5 km / h, and the size of the flatbed truck working platform is 15500 mm×5100 mm.

3. The method for integrally hoisting a foldable hatch cover of a polar multipurpose ship according to claim 1, characterized in that: In the step f, there are 8 lifting ears.

4. The method for integrally hoisting a foldable hatch cover of a polar multipurpose ship according to claim 1, characterized in that: In steps g and h, the safety load of the shackle is not less than 55 tons.

5. The method for integrally hoisting a foldable hatch cover of a polar multipurpose ship according to claim 1, characterized in that: In step g, the length of the steel wire rope is ≥ 20 meters.

6. The method for integrally hoisting a foldable hatch cover of a polar multipurpose ship according to claim 1, characterized in that: In the step h, the length of the steel wire rope is ≥ 12 meters.

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