Method for facilitating delayed entry of large-scale equipment in cabin area

Abstract

The invention discloses a method for facilitating delayed entry of large equipment in a cabin area, which comprises the following steps of: performing layered division with different widths on multiple layers of deck sections above the cabin area, and sequentially increasing the widths from bottom to top; a column of guide rails is arranged on a topmost platform of a broadside structure on each of two sides of a cabin, a column of shifting trolleys is arranged on each column of guide rails, and guide limiting grooves are formed in the shifting trolleys; the grating platform is fixed to the two rows of displacement trolleys through the guide limiting grooves; the uppermost deck section is hoisted to the position above the grating platform, and the height of a supporting structure on the grating platform is adjusted to support the uppermost deck section; the uppermost deck section covers or is far away from the top opening of the cabin through the shifting trolley; and hoisting the large-scale equipment in the cabin area into the cabin, and hoisting, welding and fixing from the lowermost deck section from bottom to top in sequence. The installation process is convenient and simple, the working efficiency is high, and the device is universal for building requirements of various different ship types, so that the cabin area construction process is not influenced by weather.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to a method for facilitating delayed entry of large equipment into an engine room area. Background Art

[0002] During shipbuilding, large equipment such as main engines and generators within the engine room have long lead times and complex installation. To shorten the docking period, the engine room, the most complex area of ​​the entire shipbuilding process, must complete the hull structure assembly and welding as quickly as possible to avoid impacting the installation of piping, outfitting, and other fittings. Since large equipment such as main engines and generators are located at the very bottom of the engine room, they must be hoisted into place before the deck structure is installed. Delays in installing these large equipment can negatively impact the installation schedule of the hull structure. Therefore, there are two common solutions. One is to pre-cut an opening in the deck structure to allow the equipment to enter the engine room, then seal the opening after the equipment is installed. This solution requires a custom, large, portable shelter to protect the engine room from rain during this period. This solution not only incurs high tooling costs, but also lacks versatility, making it difficult to reuse on subsequent ships. The second option is to not reserve a pre-reserved opening in the hull structure. Before the large equipment is about to enter the cabin, a temporary cut is made in the deck surface structure to create an opening for the large equipment to enter the cabin. The opening is then restored after the equipment is hoisted into place. Because the temporary cut in the structure may cause precision issues such as gap deviations and deformation, a large area of ​​temporary reinforcement is required before the structure is cut. After the structure is restored, the local precision deviation frame and plate will also need to be replaced. The process involved is relatively complex and incurs additional labor costs. Summary of the Invention

[0003] In order to address the deficiencies in the above-mentioned prior art, the present invention provides a method for facilitating the delayed entry of large equipment into the engine room area. This method not only does not affect the construction progress of the engine room area when the large equipment into the engine room area is delayed, but also has good applicability when facing different ship types.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0005] A method for facilitating delayed entry of large equipment into a cabin area, the method comprising the following steps:

[0006] Step 1: Divide the multi-layer deck above the engine room area into sections with different widths, with the width increasing from bottom to top;

[0007] Step 2: A row of guide rails is provided on each of the topmost platforms of the side structures on both sides of the cabin. The two rows of guide rails are parallel to each other and arranged along the top opening of the cabin. A row of shift trolleys is provided on each row of guide rails. Each row of shift trolleys includes several carriages. Spacers are provided between adjacent carriages. A guide limit groove is provided on the top of each carriage. The extension direction of the limit groove is perpendicular to the extension direction of the guide rails.

[0008] Step 3: Fix the grille platform on the two rows of shift trolleys through the guide limit slots;

[0009] Step 4: Hoist the divided uppermost deck sections onto the grid platform, adjust the height of the support structure on the grid platform to support the uppermost deck sections, and then remove the hoisting;

[0010] Step 5: When encountering rainy or snowy weather, use the shifting trolley to move the uppermost deck section to the top of the cabin opening; when encountering rainy or snowy weather, use the shifting trolley to move the uppermost deck section to the side of the cabin opening until the uppermost deck section as a whole does not intersect with the area directly above the cabin opening;

[0011] Step six: hoist large equipment into the cabin through the opening on the top of the cabin, starting from the lowest deck section and welding it in place, and completing the hoisting and welding operations of all deck sections from bottom to top.

[0012] Furthermore, in step 1, the width difference of each deck is based on the segment centerline, and the difference between the half-width of each deck and the half-width of the adjacent deck is not less than 200 mm.

[0013] Furthermore, the length of the guide rail is at least twice the length of the uppermost deck segment.

[0014] Furthermore, the grid platform includes cross beams, longitudinal beams and support structures, and several cross beams and longitudinal beams form a grid-like platform structure. Several support structures are provided at the intersections of the cross beams and longitudinal beams, and the support structures are perpendicular to the plane where the grid-like platform structure is located.

[0015] Furthermore, the distribution positions of the support structures are both axisymmetric with respect to the two center lines of the grid-like platform structure.

[0016] Furthermore, the support structure includes three sections of telescopic circular tubes, with limiting holes distributed at equal intervals on the telescopic circular tubes. The three sections of telescopic circular tubes are detachably fixedly connected by bolts passing through the limiting holes. A bolt support head is provided at the top of the uppermost telescopic circular tube, and the bolt support head is movably connected to the top of the uppermost telescopic circular tube through a threaded structure.

[0017] Furthermore, the lengths of both ends of the crossbeam exceed the outermost longitudinal beam, and telescopic crossbeams are provided at both ends of each crossbeam. The crossbeam is an I-beam, and the telescopic crossbeam is a square steel with specifications corresponding to the crossbeam. The telescopic crossbeam is sleeved on the crossbeam, and a waist-round hole is opened on the telescopic crossbeam along the axis direction of the telescopic crossbeam. The telescopic length of the telescopic crossbeam is limited by a bolt passing through the waist-round hole.

[0018] Furthermore, the telescopic beam is fixed on the shift trolley through a guide limiting groove.

[0019] Based on the above technical solution, the present invention has the following advantages compared with the existing technology: it effectively utilizes the deck segment division method in the existing construction process when building the cabin area, and uses the top deck segment to form a shielding effect on the cabin area. There is no need to purchase a large movable canopy, which means that the construction of the cabin area is not affected by rainy and snowy weather. Moreover, since the purchased large movable canopy cannot be applied to various ship types, costs are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the use state of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the grid platform in the present invention.

[0023] Figure 3 It is a structural schematic diagram of the support structure in the present invention.

[0024] Figure 4 It is a structural schematic diagram of the mobile trolley in the present invention.

[0025] Among them, 1-deck section; 2-mobile trolley; 3-grid platform; 4-crossbeam; 5-longitudinal beam; 6-support structure; 7-telescopic crossbeam; 8-guide rail; 61-telescopic round tube; 62-limiting hole; 63-spiral support head; 21-carriage; 22-distance keepers; 23-guide limit grooves. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of this application more clearly understood, the present application is described below using specific embodiments. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of this application. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of this application.

[0027] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms "a," "the," and "the" used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be understood to indicate or imply relative importance. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when..." or "when..." or "in response to determining."

[0028] In the description of this application, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0029] A method for facilitating delayed entry of large equipment into a cabin area, the method comprising the following steps:

[0030] Step 1: The multi-layer deck above the engine room area is divided into sections 1 with different widths, with the width increasing from bottom to top;

[0031] Step 2: A row of guide rails 8 are provided on the topmost platforms of the side structures on both sides of the cabin. The two rows of guide rails 8 are parallel to each other and arranged along the top opening of the cabin. A row of shifting trolleys 2 are provided on each row of guide rails 8. Each row of shifting trolleys 2 includes several carriages 21. Spacers 22 are provided between adjacent carriages 21. A guide limit groove 23 is provided on the top of each carriage 21. The extension direction of the limit groove is perpendicular to the extension direction of the guide rails 8.

[0032] Step 3: Fix the grid platform 3 on the two rows of shifting trolleys 2 through the guide limit slots 23;

[0033] Step 4: Hoist the divided uppermost deck section 1 onto the grid platform 3, adjust the height of the support structure 6 on the grid platform 3 to support the uppermost deck section 1, and then remove the hoisting;

[0034] Step 5: When encountering rainy or snowy weather, use the shifting trolley 2 to move the uppermost deck section 1 to the top of the cabin opening; when encountering rainy or snowy weather, use the shifting trolley 2 to move the uppermost deck section 1 to the side of the cabin opening until the uppermost deck section 1 as a whole does not intersect with the area directly above the cabin opening;

[0035] Step 6: Hoist large equipment in the engine room area into the cabin through the opening on the top of the cabin, starting from the lowest deck section 1 and welding it in place, and completing the hoisting and welding operations of all deck sections 1 from bottom to top.

[0036] Furthermore, in step 1, the width difference of each deck is based on the segment centerline, and the difference between the half-width of each deck and the half-width of the adjacent deck is not less than 200 mm.

[0037] Furthermore, the length of the guide rail 8 is at least twice the length of the uppermost deck segment 1 .

[0038] Furthermore, the grid platform 3 includes a crossbeam 4, a longitudinal beam 5 and a support structure 6. Several crossbeams 4 and longitudinal beams 5 form a grid-like platform structure. Several support structures 6 are provided at the intersections of the crossbeams 4 and longitudinal beams 5. The support structures 6 are perpendicular to the plane where the grid-like platform structure is located.

[0039] Furthermore, the distribution positions of the support structures 6 are both axisymmetric with respect to the two center lines of the grid-like platform structure.

[0040] Furthermore, the support structure 6 includes three sections of telescopic circular tubes 61, and limiting holes 62 are evenly spaced on the telescopic circular tubes 61. The three sections of telescopic circular tubes 61 are detachably fixedly connected by bolts passing through the limiting holes 62. A bolt support head is provided at the top of the uppermost telescopic circular tube 61, and the bolt support head is movably connected to the top of the uppermost telescopic circular tube 61 through a threaded structure.

[0041] Furthermore, the lengths of both ends of the crossbeam 4 exceed the outermost longitudinal beam 5, and a telescopic crossbeam 7 is provided at both ends of each crossbeam 4. The crossbeam 4 is an I-beam, and the telescopic crossbeam 7 is a square steel with specifications corresponding to those of the crossbeam 4. The telescopic crossbeam 7 is sleeved on the crossbeam 4, and a waist-round hole is provided on the telescopic crossbeam 7 along the axial direction of the telescopic crossbeam 7. The telescopic length of the telescopic crossbeam 7 is limited by a bolt passing through the waist-round hole. By providing the waist-round hole, it is not only possible to prevent the telescopic crossbeam 7 from being separated from the crossbeam 4, but also possible to release stress through the small displacement of the waist-round hole when the deck segment 1 falls on the grid platform 3 and starts to bear weight, so as to avoid excessive stress and deformation in the connection part between the telescopic crossbeam 7 and the crossbeam 4 affecting the telescopic length.

[0042] Furthermore, the telescopic beam 7 is fixed on the shifting trolley 2 through a guide limiting groove 23 .

[0043] Example 1

[0044] The grid platform 3 has an outer contour of 18,320 mm in length and 25,000 mm in width. It is composed of crossbeams 4 and longitudinal beams 5, each constructed from 28b I-beams welded together to form a frame. Telescopic crossbeams 7 are installed along the width edges of the grid platform 3, extending primarily within a 4,800 mm width at either end of the crossbeam 4. They are 4,700 mm long, have an inner hole width of 130 mm, a height of 285 mm, and a wall thickness of 15 mm. To ensure the vertical load-bearing capacity of the entire grid platform 3, each end of the telescopic beam can extend 2,500 mm as a width adjustment limit. Crossbeams 4 are spaced every 1,500 mm front to back, while longitudinal beams 5 are spaced every 1,500 mm across the width.

[0045] The grid platform 3 is equipped with a support structure 6 at every intersection, both longitudinally and transversely. This structure consists of three 800mm telescopic circular tubes 61, with 30mm diameter stop holes 62 defined every 100mm. The topmost telescopic tube 61 is topped with a spiral support head 63 with a 200mm travel. Rotating this support head 63 allows for millimeter-level height adjustment in increments of 100mm. Each support structure 6 can carry a rated load of 12 tons and a maximum load of 15 tons.

[0046] The load-bearing frame area of ​​the grid platform 3 is 20 meters long and 15 meters wide, and can be used as a movable wind and rain shielding device for deck sections 1 with a supporting length of less than 25 meters, a width of less than 20 meters, and a total weight of less than 200 tons.

[0047] The guide rail 8 is 40 meters long. To ensure that the trolley is evenly stressed, six shift trolleys 2 are set within 20 meters on both sides. Two guide limit slots 23 are set above each trolley. The upper end of the guide limit slot 23 is a trumpet-shaped opening, which facilitates the telescopic beam 7 to fall into the guide limit slot 23. The carriage 21 of the shift trolley 2 is composed of 75# angle steel. There are double rows of steel wheels under the carriage 21. The length of a single trolley is 2220mm and the width is 660mm. Track decking is laid on both sides of the side structure. The decking is laid at a distance of 1000mm from the center width of the decking to the edge of the cabin top opening. Double rows of tracks corresponding to the trolley steel wheels are set on the decking under the carriage 21. Each carriage 21 is equipped with four rows of rollers. The carriages 21 are arranged at equal distances of 1110mm, that is, the distance keepers 22 are 1110mm long. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and not to limit it; although the present application has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the application can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the present application, they should all be included in the scope of the technical solution requested for protection in this application.

Claims

1. A method for facilitating delayed entry of large equipment into the engine room, characterized in that: The method comprises the following steps: Step 1: Divide the multi-layer deck above the engine room area into sections with different widths, with the width increasing from bottom to top; Step 2: A row of guide rails is provided on each of the topmost platforms of the side structures on both sides of the cabin. The two rows of guide rails are parallel to each other and arranged along the top opening of the cabin. A row of shift trolleys is provided on each row of guide rails. Each row of shift trolleys includes several carriages. Spacers are provided between adjacent carriages. A guide limit groove is provided on the top of each carriage. The extension direction of the limit groove is perpendicular to the extension direction of the guide rails. Step 3: Fix the grille platform on the two rows of shift trolleys through the guide limit slots; Step 4: Hoist the divided uppermost deck sections onto the grid platform, adjust the height of the support structure on the grid platform to support the uppermost deck sections, and then remove the hoisting; Step 5: When encountering rainy or snowy weather, use the shifting trolley to move the uppermost deck section to the top of the cabin opening; when encountering rainy or snowy weather, use the shifting trolley to move the uppermost deck section to the side of the cabin opening until the uppermost deck section as a whole does not intersect with the area directly above the cabin opening; Step six: hoist large equipment into the cabin through the opening on the top of the cabin, starting from the lowest deck section and welding it in place, and completing the hoisting and welding operations of all deck sections from bottom to top.

2. A method for facilitating delayed entry of large equipment into the engine room area according to claim 1, characterized in that: In step 1, the width difference of each deck is based on the segment centerline, and the difference between the half width of each deck and the half width of the adjacent deck is not less than 200 mm.

3. The method for facilitating delayed entry of large equipment into the engine room area according to claim 1, characterized in that: The length of the guide rail is at least twice the length of the uppermost deck segment.

4. The method for facilitating delayed entry of large equipment into the engine room area according to claim 1, characterized in that: The grid platform includes cross beams, longitudinal beams and support structures. Several cross beams and longitudinal beams form a grid platform structure. Several support structures are provided at the intersections of the cross beams and longitudinal beams. The support structures are perpendicular to the plane where the grid platform structure is located.

5. A method for facilitating delayed entry of large equipment into the engine room area according to claim 4, characterized in that: The distribution positions of the support structures are both axisymmetric with respect to the two center lines of the grid-like platform structure.

6. A method for facilitating delayed entry of large equipment into the engine room area according to claim 4 or 5, characterized in that: The support structure includes three sections of telescopic circular tubes, with limiting holes distributed at equal intervals on the telescopic circular tubes. The three sections of telescopic circular tubes are detachably fixedly connected by bolts passing through the limiting holes. A bolt support head is provided at the top of the uppermost telescopic circular tube, and the bolt support head is movably connected to the top of the uppermost telescopic circular tube through a threaded structure.

7. A method for facilitating delayed entry of large equipment into the engine room area according to claim 4, characterized in that: The lengths of both ends of the crossbeam exceed the outermost longitudinal beam. Telescopic crossbeams are provided at both ends of each crossbeam. The crossbeam is an I-beam. The telescopic crossbeam is a square steel with specifications corresponding to the crossbeam. The telescopic crossbeam is sleeved on the crossbeam. A waist-round hole is opened on the telescopic crossbeam along the axis direction of the telescopic crossbeam. The telescopic length of the telescopic crossbeam is limited by a bolt passing through the waist-round hole.

8. The method for facilitating delayed entry of large equipment into the engine room area according to claim 7, characterized in that: The telescopic crossbeam is fixed on the shift trolley through a guide limiting groove.

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