Stacking, supporting and repairing method for multi-layer hatch cover of container ship

Abstract

The invention discloses a container ship multi-layer hatch cover stacking, supporting and repairing method. The method comprises the following steps that a, hatch covers are divided into 2-3 size types; b, four special supporting piers are arranged on the site, and the hatch cover is hoisted and placed on the supporting piers; c, the four special supporting piers are welded to a supporting structure arranged below the hatch cover; d, the hatch cover is hoisted to a repairing site to be placed through a crane; e, the step b and the step c are repeated, and then the hatch cover is hoisted to the hatch cover placed on the site; f, the step b, the step c, the step d and the step e are repeated till five layers of hatch covers are stacked, and then the hatch covers are placed again; g, after the hatch cover is placed, scaffolds are erected on the periphery for repairing; h, after the hatch covers are submitted and checked, the hatch cover on the fifth layer on the uppermost portion is reassembled to the ship; and i, the step h is repeated, all the hatch covers are hoisted and reloaded to the ship, the special supporting piers are placed in order on the site, and hatch cover repairing is completed. According to the method, the hatch cover repairing number is increased, the occupied site is small, and more output values and profits are created.

Description

Technical Field

[0001] This invention relates to the field of container ship hatch cover repair engineering, and more particularly to a method for supporting and repairing multi-layer container ship hatch covers. Background Technology

[0002] Container ships have become a major product in routine repairs in recent years. During repairs, the repair and painting of container hatch covers are crucial components. A single ship typically has up to 80 hatch covers, and 3-4 container ships usually dock simultaneously. Assuming 60% of the hatch covers require repair, and considering 4 container ships docked, approximately 192 hatch covers need simultaneous repair. Each hatch cover is approximately 13m x 13m, requiring a site area of ​​about 35,000 square meters. However, existing repair space is only 12,000 square meters. This limited space leads to a rushed and slow process for container ship hatch cover repairs, resulting in longer repair cycles. To create more value and undertake more container ship repairs, a method for multi-layered hatch cover stacking and simultaneous repair has been invented to address these issues. Summary of the Invention

[0003] The purpose of this invention is to provide a method for supporting and repairing multi-layer hatch covers of container ships that helps to increase the number of hatch covers that can be repaired simultaneously, thereby improving production efficiency, occupies a small area, and is simple to operate.

[0004] The technical solution adopted by the present invention to achieve the above objectives is: a method for repairing multi-layer hatch covers stacked on container ships, comprising the following steps: a. Based on the characteristics of container ship hatch covers, hatch covers are divided into 2-3 size types; b. Arrange four dedicated support blocks on the site according to the size requirements, and use a crane to lift the hatch cover and place it on the four dedicated support blocks, so that the upper surface of the dedicated support blocks contacts the support structure that is attached to the hatch cover. c. The four dedicated support blocks and the built-in support structure under the hatch are all welded together; d. After step c above is completed, use a crane to lift the hatch cover to the repair site for placement; e. After repeating steps b and c above, hoist the hatch cover onto the hatch cover that has been placed on the site, and ensure that the structure below the special support block avoids the protruding structure above the hatch cover, so that the panel of the structure below the special support block contacts the deck of the hatch cover. f. Repeat steps b, c, d, and e above until the hatch covers are stacked five times, then rearrange the hatch covers. g. After the hatch cover is placed, scaffolding is erected around it for repair work. After the repair is completed, the welding points between the special support block below and the hatch cover are cut, the cut points are ground and treated, and then painted. h. After the hatch cover is inspected and completed, use a crane to reinstall the top fifth-level hatch cover back onto the ship. After it is installed on the ship, use a crane to lift the four special support blocks on the upper part of the fourth level to the ground. i. Repeat step h above to hoist all hatch covers back onto the ship and place the special support blocks on the site. Arrange them neatly and complete the repair of the hatch cover.

[0005] In step c, each dedicated support pier is welded in two places, with each weld having a length of 50mm and a weld height of 6mm.

[0006] In steps b, c, e, g, h, and i, the special support pier is a support pier with a safe load of 60 tons.

[0007] This invention discloses a method for repairing multi-layered hatch covers on container ships by stacking and supporting them. This method not only meets the repair needs of hatch covers and increases the number of hatch covers that can be repaired simultaneously, but also occupies less space, thereby generating more output value and profit. It greatly reduces the space occupied during hatch cover repair, and the stacked hatch covers can be repaired simultaneously without increasing repair time. It frees up a lot of space resources, allowing for the undertaking of more container ship hatch cover repair projects. Furthermore, the method for stacking and supporting container ship hatch covers is safe, helps improve production efficiency, and is simple to operate. Attached Figure Description

[0008] Figure 1 This is a diagram showing the arrangement of container ship hatch covers in a multi-layered hatch cover stacking and support repair method for container ships according to the present invention.

[0009] Figure 2 This is a diagram showing the support arrangement of container ship hatch covers according to a method for repairing multi-layered hatch covers stacked on container ships, as described in this invention.

[0010] Figure 3 yes Figure 2 AA cross-section view.

[0011] Figure 4 yes Figure 2 BB cross-section. Detailed Implementation

[0012] like Figures 1 to 4 As shown, the repair method for multi-layered hatch cover stacking supports on container ships includes the following steps: a. Based on the characteristics of container ship hatch covers, which have similar structural forms, the same length, slightly different widths, and the same height, hatch covers 1 are divided into 2-3 size types; b. Arrange four dedicated support blocks 3 on the site according to the size requirements, and use a crane to lift and place the hatch cover 1 onto the four dedicated support blocks 3, so that the upper surface of the dedicated support blocks 3 contacts the built-in support structure 2 under the hatch cover 1; c. Weld the four dedicated support blocks 3 to the built-in support structure 2 under the hatch cover 1, with two welds on each dedicated support block 3, each weld being 50mm long and having a weld radius of 100mm. d. After step c is completed, use a crane to lift hatch cover 1 to the repair site for placement; e. Repeat steps b and c above, then lift hatch cover 1 onto the hatch cover 1 already placed on the site, ensuring that the structure below the special support pier 3 avoids the protruding structure 4 above the hatch cover, so that the lower structural panel of the special support pier contacts the deck of hatch cover 1; f. Repeat steps b, c, d, and e above until hatch cover 1 is stacked five times, then rearrange hatch cover 1; g. After hatch cover 1 is placed, erect scaffolding around it for repair work; after repair is completed... Cut the welding point between the lower support pier 3 and the hatch cover 1, grind the cut point, and then paint it. h. After the hatch covers are inspected and completed, use a crane to reinstall the top fifth-layer hatch cover 1 back onto the ship. After being hoisted onto the ship, use a crane to lift the four special support piers 3 on the upper part of the fourth layer to the ground. i. Repeat the above step h to hoist all the hatch covers 1 back onto the ship, and arrange the special support piers 3 neatly on the site to complete the repair of the hatch cover 1. In the above steps, the special support piers 3 are support piers with a safe load of 60 tons. The multi-layer hatch cover stacking support repair method of the present invention greatly increases the number of hatch covers stacked without changing the original site area. The hatch covers can be stacked and construction can be carried out simultaneously, which greatly increases the number of hatch cover repairs and greatly reduces the tension of site resources, creating more output value.

Claims

1. A method for repairing multi-layered hatch covers stacked and supported on container ships, characterized in that... This includes the following steps: a. Based on the characteristics of container ship hatch covers, hatch covers are divided into 2-3 size types; b. Arrange four dedicated support blocks on the site according to the size requirements, and use a crane to lift the hatch cover and place it on the four dedicated support blocks, so that the upper surface of the dedicated support blocks contacts the support structure that is attached to the hatch cover. c. The four dedicated support blocks and the built-in support structure under the hatch are all welded together; d. After step c above is completed, use a crane to lift the hatch cover to the repair site for placement; e. After repeating steps b and c above, hoist the hatch cover onto the hatch cover that has been placed on the site, and ensure that the structure below the special support block avoids the protruding structure above the hatch cover, so that the panel of the structure below the special support block contacts the deck of the hatch cover. f. Repeat steps b, c, d, and e above until the hatch covers are stacked five times, then rearrange the hatch covers. g. After the hatch cover is placed, scaffolding is erected around it for repair work. After the repair is completed, the welding points between the special support block below and the hatch cover are cut, the cut points are ground and treated, and then painted. h. After the hatch covers have been inspected and approved, use a crane to reinstall the top fifth-floor hatch cover back onto the ship. After being loaded onto the ship, a crane was used to lift the four special support piers on the upper part of the fourth floor to the ground. i. Repeat step h above to hoist all the hatch covers back onto the ship, and place the special support blocks neatly on the site to complete the repair of the hatch covers.

2. The method for repairing multi-layer hatch covers of a container ship by stacking and supporting them according to claim 1, characterized in that: In step c, each dedicated support pier is welded in two places, with each weld having a length of 50mm and a weld height of 6mm.

3. The method for repairing multi-layer hatch covers of a container ship by stacking and supporting them according to claim 1, characterized in that: In steps b, c, e, g, h, and i, the special support pier is a support pier with a safe load of 60 tons.

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