CN117719646A - Combined front mast split assembling and integral hoisting method on ship - Google Patents
Combined front mast split assembling and integral hoisting method on ship Download PDFInfo
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- CN117719646A CN117719646A CN202311664528.4A CN202311664528A CN117719646A CN 117719646 A CN117719646 A CN 117719646A CN 202311664528 A CN202311664528 A CN 202311664528A CN 117719646 A CN117719646 A CN 117719646A
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Abstract
The invention relates to a combined front mast split assembling and integral hoisting method on a ship, which comprises a split assembling link and an integral hoisting link, wherein the combined front mast structurally comprises a base, a mast body and mast top equipment, and the base, the mast body and the mast top equipment are manufactured in split mode on different sites in the split assembling link and are respectively transported to a total assembly site; the base is hoisted to the general assembly platform; turning over the mast body by 90 degrees by using a crane to be normal; normally hoisting the mast body to the base and installing the mast body in a butt joint manner; embedding the mast top equipment on the top of the mast body to complete the assembly of the combined front mast; and in the integral hoisting step, calculating the weight and the gravity center position of the combined front mast, and adopting a hoisting row and a three-dimensional hoisting frame structure to realize the integral hoisting of the combined front mast. The method of the invention can realize split hoisting in the construction process, assemble in the main assembly platform in advance, and then hoist integrally, thereby realizing the modularization and the integrity installation of equipment and improving the construction efficiency.
Description
Technical Field
The invention relates to ship construction, in particular to a method for split assembly and integral hoisting of a combined front mast on a ship.
Background
In the ship construction process, there are often a lot of equipment or facilities, and in view of transportation convenience, the equipment or facilities are divided into several parts to be transported to a shipyard, and assembled and installed by the shipyard. The equipment manufacturer only considers the transportation and hoisting of parts, omits the installation of equipment in the dock stage in the actual construction process of a shipyard, occupies crane resources, prolongs the dock construction period, and has the biggest problems that a large amount of high-altitude operations are installed in bulk hoisting, scaffolds are required to be built in an auxiliary mode, the working efficiency is low, and the safety risk is extremely high.
When constructing some ships, the front mast structure is assembled and then lifted integrally. In the current shipbuilding practice, the sectional and total section structures including the front mast structure are just a way of installing parts in the high-altitude operation. In practice, the mast body structure of the ship body is fine and weak, lifting lugs cannot be specially arranged for lifting installation, and the prior art and the method are often difficult to install, so that the overall construction efficiency of the ship is affected. Under the situation, the invention provides a novel assembling mode and a corresponding hoisting method of the combined front mast on the ship, which aims to solve the installation problem of the equipment and meet the rapid and safe installation requirement of the front mast structure, thereby improving the installation efficiency and reducing the installation risk.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a split assembling and integral hoisting method for a combined front mast on a ship. The combined front mast split assembling and integral hoisting method can solve the hoisting and installing requirements of the combined front mast in the building process, and can be assembled on a platform in advance, so that the modularization and the integral installation of equipment are realized, and the building efficiency is improved.
In order to achieve the above object, the present invention provides the following technical solutions:
the method comprises split assembly and integral hoisting steps, wherein the combined front mast structurally comprises a base, a mast body and a mast top device,
in the split assembly link, comprising:
firstly, after the base, the mast body and the mast top equipment are manufactured in different places, respectively transporting to a total group place;
secondly, firstly placing a skid on a main assembly platform and adjusting the skid to be horizontal, hoisting the skid to the skid through lifting lugs on a base, wherein the base is of a round platform structure, and four lifting lugs arranged along the normal direction of the circle center of the round platform are arranged on the top surface of the round platform;
thirdly, turning over the mast body by 90 degrees to be normal by using a crane and taking a suspender in the top end of a mast body top column body as a main hook and taking a lifting lug arranged on a mast body transportation jig frame as an auxiliary hook;
fourth, under the condition that the main hook at the top is not loosened, the connection between the mast body and the transportation jig frame is released, the auxiliary hook hanging point on the transportation jig frame is loosened, the mast body is normally hoisted to the base, and the mast body is in butt joint with the base for installation;
fifthly, loosening a main hook hoisted by the mast body, and withdrawing the crane;
sixthly, embedding the mast top equipment on the top of the mast body to complete the assembly of the combined front mast;
in the integral hoisting link, the method comprises the following steps:
seventhly, calculating the weight and the gravity center position of the combined front mast, and adopting a hanging row and three-dimensional hanging frame structure to realize the integral hanging of the combined front mast;
the eighth step, hang four steel wire ropes on the hook of the hoist, four steel wire ropes are connected to lifting lugs of the upper end face of the hoist bar respectively, there are four lower steel wire ropes to connect on lifting lugs of the lower end face of the hoist bar separately, another end of the four lower steel wire ropes is connected to stereoscopic hanging bracket respectively, the said stereoscopic hanging bracket includes U-shaped frame and round tube connecting rod, one side of the said U-shaped frame has openings, there are four lifting lugs above and below of the said U-shaped frame separately;
ninth, one side of the opening of the U-shaped frame enters from the side surface of the mast body until the U-shaped frame is positioned in the center of the mast body, the lower steel wire rope is connected to four lifting lugs above the U-shaped frame, the four lifting lugs below the U-shaped frame are respectively connected with the round pipe connecting rods, and the other ends of the four round pipe connecting rods are respectively connected with the lifting lugs on the base;
tenth, installing a sealing cross rod, wherein the sealing cross rod is installed on one side of the opening of the U-shaped frame so as to restrain the mast in the U-shaped frame;
starting a crane, slowly lifting the combined front mast by using a steel wire rope, a lifting row and a three-dimensional lifting frame, and lifting the combined front mast to a ship body section to be installed in place;
and twelfth, after the hoisting is finished, removing the sealing cross rod and the steel wire rope, and withdrawing the U-shaped frame in the opposite direction, so that the integral hoisting of the combined front mast is completed.
In the combined front mast split assembling and integral hoisting method on the ship, the third step adopts the hanging rod embedded in the top column and the lifting lug on the transportation jig frame to complete turning over of the mast body.
In the third step, the middle part of the mast body is a column body, a plurality of masts are obliquely fixed on the column body, electric equipment comprising wires, cables and electric lamps is arranged on the masts, and the center of gravity of the mast body is positioned at the position, close to the masts, of the upper part of the column body.
In the combined front mast split assembling and integral hoisting method on the ship, the U-shaped frame in the eighth step is a rectangular frame structure formed by surrounding three section steel into a U-shaped inner groove, and the main size of the structure of the U-shaped frame is larger than that of a mast body column body and at least larger than 1 meter.
In the combined front mast split assembling and integral hoisting method on the ship, three section steel are respectively two side section steel and a bottom section steel, the two side section steel are parallel and vertically fixed at two ends of the bottom section steel, short plate section steel is also vertically fixed at the end parts of the two side section steel, and a reserved U-shaped inner groove opening is used as a U-shaped frame opening in a gap between the short plate section steel.
In the combined front mast split assembling and integral hoisting method on the ship, further, a toggle plate is arranged at the included angle between the short plate section steel and the section steel at two sides, and inclined pull reinforcement is arranged at the included angle between the section steel at two sides and the section steel at the bottom.
In the combined front mast split assembling and integral hoisting method on the ship, further, lifting lugs are fixed on the upper surface and the lower surface of the two ends of the profile steel on the two sides, four lifting lugs are arranged on the upper surface and the lower surface of the U-shaped frame, the arc of a lifting point connecting line formed by the four lifting lugs is concentric with the arc of the connecting line of the four lifting lugs on the top surface of the round table of the base, and the direction of a lifting lug main board is consistent with the direction of a corresponding lifting lug main board on the table surface of the base.
In the combined front mast split assembling and integral hoisting method on the ship, further, a round hole is formed in the outer end face of one side, close to the opening, of the short plate type steel, the round pipe connecting rod is a round pipe with sealing plates on two sides, lifting lugs are respectively arranged on the sealing plates on two ends, and the directions of main boards of the lifting lugs on two ends are kept consistent.
In the combined front mast split assembling and integral hoisting method on the ship, the projection size of the circular pipe connecting rod in the vertical direction is larger than the height value from the gravity center to the lifting lug on the base and is larger than 1 meter.
In the combined front mast split assembling and integral hoisting method on the ship, further, the distance between lifting lugs below the hoisting row is larger than the size of the projection surface of the mast, and a safety margin which is at least larger than 1m is reserved between the periphery of the projection edge of the mast and the inner wall of the U-shaped frame.
In the combined front mast split assembling and integral hoisting method on the ship, for the tenth step, the sealing cross rod main body is a circular tube, sealing plates are arranged at two ends of the circular tube, square plates are arranged on the sealing plates, round holes are formed in the square plates, round holes in the middle and short plate section steel with the same size are formed in the round holes, the distances between connecting lines of the centers of the round holes are equal, and the sealing cross rod and the U-shaped frame are connected and fixed through bolts and nuts.
Based on the technical scheme, the combined front mast split assembly and integral hoisting method on the ship has the following technical effects through the application of the real ship:
1. the combined front mast split assembling and integral hoisting method can solve the separate hoisting and installing requirements of combined front mast component parts in the building process, and the combined front mast component parts are assembled on a main assembly platform in advance, so that the modular building trend of equipment is met, the requirement of integral installation can be met, and the building efficiency and the building quality of ships are improved in a split assembling and integral hoisting mode.
2. The combined front mast split assembling and integral hoisting method is characterized in that a special three-dimensional hanging frame and a hanging row are arranged according to the structural characteristics of the combined front mast, the hanging three-dimensional hanging frame is laterally inserted, the problem that a frame needs to be sleeved from the top and is very large to avoid a mast structure is avoided, the tool body is small, and the manufacturing cost is low.
3. The three-dimensional hanging bracket in the combined front mast split assembly and integral hanging method is detachable, can be reused, is simple to operate, saves cost and achieves the purposes of reducing cost and enhancing efficiency in the ship construction process.
Drawings
FIG. 1 is a schematic diagram of an assembly process of a combined front mast according to the present invention.
Fig. 2 is a schematic diagram of the integral hoisting method of the combined front mast.
Fig. 3 is a schematic view of the structure of the neutral hanger of the present invention.
Detailed Description
The assembling mode and the hoisting method of the combined front mast on the ship are further described in detail below with reference to the accompanying drawings, so that the application process of the method is more clearly understood, but the protection scope of the invention is not limited by the method.
In ship construction, the combined front mast is used for bulk supply of parts, lifting lugs cannot be additionally arranged due to special equipment structure and materials, and a bulk installation mode is adopted by default, so that scaffold erection work is increased, longer crane service time is occupied, dock period is prolonged, and construction efficiency is not improved. If the combined front mast is assembled in advance, the lifting lug on the base body is used for directly lifting the hook, so that the risk of overturning and shaking exists due to the fact that the gravity center is too high, and potential safety hazard is high.
As shown in figure 1, the invention relates to an assembling mode and a hoisting method of a combined front mast on a ship, wherein the combined front mast consists of a base 1, a mast body 2 and a mast top device 3, the base 1 is of a circular truncated cone structure, and four lifting lugs are distributed on a table top along a normal direction. The mast body 2 comprises a column body and a mast, wherein the mast body is transported in a side state, is turned over and installed through a boom arranged in the top end of the column body, and is inclined upwards. The mast 3 is inserted in the top of the mast 1, the mast 3 needs to be installed after the mast 2 is erected, the body of the mast is not provided with lifting lugs, and lifting points cannot be set and can only be lifted up in an integral lifting manner. After the combination work of the combined front mast is completed after the three processes of (1) → (2) → (3) in fig. 1, the height of the gravity center 8 of the combined front mast is higher than the height of the lifting lug on the table surface of the base 3, which is a stability factor to be considered in lifting.
The invention relates to a combined front mast split assembling and integral hoisting method, which comprises split assembling links and integral hoisting links. Wherein the method comprises the steps of
As shown in fig. 2, in the split assembly link, the method includes:
firstly, after the split construction of the base 1, the mast body 2 and the mast head equipment 3 in different sites is completed, the base, the mast body 2 and the mast head equipment 3 are respectively transported to a total group site;
secondly, firstly placing the skid 10 on the main assembly platform and adjusting the skid to be horizontal, hoisting the skid 10 by lifting lugs on the base 1, wherein the base 1 is in a round platform structure, and four lifting lugs arranged along the normal direction of the circle center of the round platform are arranged on the top surface of the round platform.
Thirdly, turning over the mast body 2 by 90 degrees by using a crane, taking a suspender in the top end of a top column body of the mast body 2 as a main hook and taking lifting lugs arranged on a mast body transportation jig frame as auxiliary hooks, and changing the mast body 2 from a lying state on the transportation jig frame into a normal state after turning over. For the mast body 2, a column body is arranged in the middle of the mast body 2, a plurality of masts are obliquely fixed on the column body, and electric equipment including wires, cables and electric lamps is arranged on the masts. This configuration of the head-to-foot weight results in the centre of gravity of the mast body 2 being located in the upper part of the column near the mast. The turning of the mast body is completed by adopting the hanging rod embedded in the top column body and the lifting lug on the transportation jig frame, so that the stability is high and the safety is ensured.
Fourth, under the condition that the main hook at the top is not loosened, the connection between the mast body 2 and the transportation jig frame is released, the auxiliary hook hanging point on the transportation jig frame is loosened, the mast body 2 is normally hoisted to the base 1 and is in butt joint with the base 1, so that the mast body 2 is fixed on the base 1, and at the moment, the mast body 2 and the base 1 are positioned on the same axis.
And fifthly, loosening the main hook hoisted on the mast body 2, and withdrawing the crane.
And sixthly, supporting the whole mast head equipment 3 to the top of the mast body 2, embedding the mast head equipment 3 at the top of the mast body 2, and completing the assembly work of the combined front mast after the fixation is completed.
After the front mast structure is assembled, the front mast structure needs to be hoisted to a hull structure, which is a subsequent integral hoisting link.
As shown in fig. 3, in the integral hoisting link, the method includes:
and seventhly, calculating the weight of the combined front mast and the position of the gravity center 8, and adopting a hanging row 6 and a three-dimensional hanging frame 9 to realize the integral hanging of the combined front mast.
Eighth, hang on the couple of portal crane 4 as the crane and establish four last wire ropes 5, four go up wire rope 5 and connect respectively on hanging the lug of arranging 6 up end, be equipped with four down wire rope 7 on hanging the lug of arranging 6 down end in addition and connect, another of this four down wire rope 7 connects respectively on three-dimensional gallows 9, three-dimensional gallows 9 including U type frame 91 and pipe connecting rod 92, one side of U type frame 91 is equipped with the opening, the top and the below of U type frame 91 are equipped with four lugs respectively.
For the three-dimensional hanging bracket 9, the U-shaped frame 91 is a rectangular frame structure formed by surrounding three sections into a U-shaped inner groove, and the main size of the U-shaped frame 91 is larger than the column size of the mast body 2 and at least larger than 1 meter. Specifically, the three sections are two side sections and a bottom section, the two side sections are parallel and vertically fixed at two ends of the bottom section, a short plate section is vertically fixed at the end of the two side sections, and a gap between the short plate section is a reserved opening of the U-shaped inner groove as an opening of the U-shaped frame 91.
The included angle between the short plate section steel and the section steel at two sides is provided with a toggle plate 95, and the included angle between the section steel at two sides and the section steel at the bottom is provided with a diagonal reinforcement. Lifting lugs are fixed on the upper surface and the lower surface of the two ends of the profile steel on the two sides, four lifting lugs are arranged on the upper surface and the lower surface of the U-shaped frame, the arc of a lifting point connecting line formed by the four lifting lugs is concentric with the arc of the connecting line of the four lifting lugs on the top surface of the round table of the base, and the direction of a lifting lug main board is consistent with the direction of a corresponding lifting lug main board on the table surface of the base.
The outer end face of the short plate type steel, which is close to one side of the opening, is provided with a round hole, the round pipe connecting rod is a round pipe with sealing plates at two sides, lifting lugs are respectively arranged on the sealing plates at two ends, and the directions of main boards of the lifting lugs at two ends are kept consistent.
And ninth step, one side of the opening of the U-shaped frame 91 enters from the side surface of the mast body 2 until the U-shaped frame 91 is positioned at the center of the mast body 2, the lower steel wire rope 7 is connected to four lifting lugs above the U-shaped frame 91, the four lifting lugs below the U-shaped frame 91 are respectively connected with the round pipe connecting rod 92, and the other ends of the four round pipe connecting rods 92 are respectively connected with the lifting lugs on the base 1. The projected dimension of the circular tube connecting rod 92 in the vertical direction is larger than the height value from the gravity center to the lifting lug on the base 1 and is larger than 1 meter.
Tenth, a sealing cross rod 93 is installed, and the sealing cross rod 93 is installed at one side of the opening of the U-shaped frame 91, so as to restrain the mast of the mast body 2 in the U-shaped frame 91. The distance between lifting lugs below the lifting row 6 is larger than the size of the projection surface of the mast, and a safety margin which is at least larger than 1m is reserved between the periphery of the projection edge of the mast and the inner wall of the U-shaped frame, so that enough space is reserved, and excessive collision friction during lifting can be avoided. The main body of the sealing cross rod 93 is a circular tube, sealing plates are arranged at two ends of the circular tube, square plates are arranged on the sealing plates, round holes are formed in the square plates, the round holes in the short plate-shaped steel in the round hole size are identical in size, the distances between the center connecting lines of the round holes are equal, and the sealing cross rod 93 and the U-shaped frame 91 are fixedly connected through bolts and nuts 94. For the U-shaped frame 91, four hanging rings on the U-shaped frame 91 are distributed on the same circumference, a U-shaped frame hanging ring connecting line 98 formed by hanging rings 96 on the U-shaped frame 91, four hanging rings on a round table surface on a base 1 are positioned on the same circumference, a base hanging ring connecting line 95 formed by hanging rings on the base, and the base hanging ring connecting line 95 and the U-shaped frame hanging ring connecting line 98 are coaxial and belong to concentric circles.
Starting the crane, slowly hanging and pulling the combined front mast by using the upper steel wire rope 5, the lower steel wire rope 7, the hanging row 6 and the three-dimensional hanging frame 9, and hanging the combined front mast onto a ship body section to be installed in place, specifically, fixing the base 1 of the combined front mast onto the ship body section.
And twelfth, after the hoisting is finished, removing the sealing cross rod 93, the upper steel wire rope and the lower steel wire rope, and withdrawing the U-shaped frame 91 in the opposite direction, so that the integral hoisting of the combined front mast is completed.
The assembling mode and the hoisting method of the combined front mast on the ship are a hoisting mode suitable for novel structures or equipment, and have extremely strong technical reference significance. The combined front mast can solve the lifting and mounting requirements in the building process, can be assembled on a platform in advance, realizes the requirements of equipment modularization and integrity mounting, and improves the building efficiency. The vertical hanging frame for hoisting is laterally inserted, the problem that the frame needs to be made to be huge to avoid a mast structure is avoided, the tool body is smaller, and the manufacturing cost is low. The hanging bracket is detachable, can be reused, is simple to operate, saves cost and achieves the purposes of reducing cost and enhancing efficiency.
The technical problems, technical solutions and advantageous effects of the present invention have been further described in detail in the above embodiments, and it should be understood that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (11)
1. A split assembling and integral hoisting method for a combined front mast on a ship is characterized by comprising a split assembling link and an integral hoisting link, wherein the combined front mast structurally comprises a base, a mast body and mast top equipment,
in the split assembly link, comprising:
firstly, after the base, the mast body and the mast top equipment are manufactured in different places, respectively transporting to a total group place;
secondly, firstly placing a skid on a main assembly platform and adjusting the skid to be horizontal, hoisting the skid to the skid through lifting lugs on a base, wherein the base is of a round platform structure, and four lifting lugs arranged along the normal direction of the circle center of the round platform are arranged on the top surface of the round platform;
thirdly, turning over the mast body by 90 degrees to be normal by using a crane and taking a suspender in the top end of a mast body top column body as a main hook and taking a lifting lug arranged on a mast body transportation jig frame as an auxiliary hook;
fourth, under the condition that the main hook at the top is not loosened, the connection between the mast body and the transportation jig frame is released, the auxiliary hook hanging point on the transportation jig frame is loosened, the mast body is normally hoisted to the base, and the mast body is in butt joint with the base for installation;
fifthly, loosening a main hook hoisted by the mast body, and withdrawing the crane;
sixthly, embedding the mast top equipment on the top of the mast body to complete the assembly of the combined front mast;
in the integral hoisting link, the method comprises the following steps:
seventhly, calculating the weight and the gravity center position of the combined front mast, and adopting a hanging row and three-dimensional hanging frame structure to realize the integral hanging of the combined front mast;
the eighth step, hang four steel wire ropes on the hook of the hoist, four steel wire ropes are connected to lifting lugs of the upper end face of the hoist bar respectively, there are four lower steel wire ropes to connect on lifting lugs of the lower end face of the hoist bar separately, another end of the four lower steel wire ropes is connected to stereoscopic hanging bracket respectively, the said stereoscopic hanging bracket includes U-shaped frame and round tube connecting rod, one side of the said U-shaped frame has openings, there are four lifting lugs above and below of the said U-shaped frame separately;
ninth, one side of the opening of the U-shaped frame enters from the side surface of the mast body until the U-shaped frame is positioned in the center of the mast body, the lower steel wire rope is connected to four lifting lugs above the U-shaped frame, the four lifting lugs below the U-shaped frame are respectively connected with the round pipe connecting rods, and the other ends of the four round pipe connecting rods are respectively connected with the lifting lugs on the base;
tenth, installing a sealing cross rod, wherein the sealing cross rod is installed on one side of the opening of the U-shaped frame so as to restrain the mast in the U-shaped frame;
starting a crane, slowly lifting the combined front mast by using a steel wire rope, a lifting row and a three-dimensional lifting frame, and lifting the combined front mast to a ship body section to be installed in place;
and twelfth, after the hoisting is finished, removing the sealing cross rod and the steel wire rope, and withdrawing the U-shaped frame in the opposite direction, so that the integral hoisting of the combined front mast is completed.
2. The method for assembling and integrally hoisting a combined front mast on a ship according to claim 1, wherein in the third step, turning over of the mast is accomplished by using a boom embedded in a top column and lifting lugs on a transport jig.
3. The method for assembling and integrally hoisting a combined front mast on a ship according to claim 1, wherein in the third step, the middle part of the mast body is a column body, a plurality of masts are obliquely fixed on the column body, electric equipment including wires, cables and electric lamps is arranged on the masts, and the center of gravity of the mast body is positioned at the position, close to the masts, of the upper part of the column body.
4. The method for assembling and integrally hoisting a combined front mast on a ship according to claim 1, wherein in the eighth step, the U-shaped frame is a rectangular frame structure formed by three sections enclosing a U-shaped inner groove, and the main size of the structure of the U-shaped frame is larger than the mast body column and at least larger than 1 meter.
5. The method for assembling and integrally hoisting a combined front mast on a ship according to claim 4, wherein the three section steel are respectively two side section steel and a bottom section steel, the two side section steel are parallel and vertically fixed at two ends of the bottom section steel, a short plate section steel is vertically fixed at the end parts of the two side section steel, and a reserved U-shaped inner groove opening is used as a U-shaped frame opening in a gap between the short plate section steel.
6. The method for assembling and integrally hoisting a composite front mast on a ship according to claim 5, wherein a toggle plate is arranged at the included angle between the short plate section steel and the section steel at two sides, and a diagonal reinforcement is arranged at the included angle between the section steel at two sides and the section steel at the bottom.
7. The method for assembling and integrally hoisting the combined front mast on the ship according to claim 6, wherein lifting lugs are fixed on the upper surface and the lower surface of the two ends of the profile steel on the two sides, four lifting lugs are arranged on the upper surface and the lower surface of the U-shaped frame, the arc of a lifting point connecting line formed by the four lifting lugs is concentric with the arc of the connecting line of the four lifting lugs on the top surface of the round table of the base, and the direction of a lifting lug main board is consistent with the direction of a corresponding lifting lug main board on the table surface of the base.
8. The method for assembling and integrally hoisting the combined front mast on the ship according to claim 5, wherein the outer end face of the short-plate steel, which is close to the opening, is provided with a round hole, the round pipe connecting rod is a round pipe with sealing plates at two sides, the sealing plates at two ends are respectively provided with lifting lugs, and the directions of main boards of the lifting lugs at two ends are kept consistent.
9. The method for assembling and integrally hoisting a combined front mast on a vessel according to claim 5, wherein the projected dimension of the circular tube connecting rod in the vertical direction is larger than the height value from the center of gravity to the lifting lug on the base and is larger than 1 meter.
10. The method for assembling and integrally hoisting a combined front mast on a ship according to claim 5, wherein the distance between lifting lugs below a hoist row is larger than the size of a projection surface of the mast, and a safety margin which is at least larger than 1m is reserved between the periphery of the mast and the inner wall of the U-shaped frame.
11. The method for assembling and integrally hoisting the combined front mast on the ship according to claim 8, wherein in the tenth step, the sealing cross rod main body is a circular tube, sealing plates are arranged at two ends of the circular tube, square plates are arranged on the sealing plates, round holes are formed in the square plates, round holes in the middle and short plate section steel with the same size are formed in the round holes, the distances between the center connecting lines of the round holes are equal, and the sealing cross rod and the U-shaped frame are fixedly connected through bolts and nuts.
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| CN202311664528.4A CN117719646A (en) | 2023-12-06 | 2023-12-06 | Combined front mast split assembling and integral hoisting method on ship |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116353792A (en) * | 2023-03-24 | 2023-06-30 | 江南造船(集团)有限责任公司 | Integrity hoisting method of radar mast |
| CN119551160A (en) * | 2024-12-02 | 2025-03-04 | 大连中远海运重工有限公司 | Integral hoisting method of foldable hatch cover for polar multipurpose ship |
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- 2023-12-06 CN CN202311664528.4A patent/CN117719646A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116353792A (en) * | 2023-03-24 | 2023-06-30 | 江南造船(集团)有限责任公司 | Integrity hoisting method of radar mast |
| CN119551160A (en) * | 2024-12-02 | 2025-03-04 | 大连中远海运重工有限公司 | Integral hoisting method of foldable hatch cover for polar multipurpose ship |
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