Method for hoisting chimney block based on structural trepanning

Abstract

The invention discloses a chimney block hoisting method based on structural trepanning, and the method specifically comprises the following steps: S1, determining the structural form of a chimney block according to block division, and determining the mass of the chimney block according to the structural form of the chimney block; s2, determining a hoisting scheme of the chimney block according to the structural form and the mass quantity information of the chimney block; s3, when the mass of the chimney block is smaller than or equal to the load of a single gantry crane, single-machine three-point hoisting or single-machine row hoisting is adopted to complete hoisting of the chimney block; and S4, when the mass of the chimney block is larger than the load of a single gantry crane, hoisting of the chimney block is completed through two-machine combined hoisting. When the steel plate is cut, numerical control trepanning is completed, welding and cutting work of hanging weights or structural hanging rows in a segmented stage is avoided, and materials and labor are saved; aloft work is reduced, and personnel safety is guaranteed; the paint damage is reduced, and the integrity of the block is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shipbuilding, and particularly relates to a method for hoisting a chimney section based on structural openings. BACKGROUND

[0002] The chimney section of a large container ship is difficult to hoist due to its large size and weak structure. The conventional method is to weld lifting lugs on the surrounding wall or structural lifting lugs on the top of the section. These two methods can meet the hoisting requirements of the chimney section, but there are still some problems. First, the welding and removal of the lifting lugs or structural lifting lugs require a large amount of work, which results in waste of labor and materials. Second, the welding and removal of the lifting lugs or structural lifting lugs cause damage to the paint, affecting the integrity of the section, and the paint repair further increases the construction cost. Third, the welding and removal work is performed at a high altitude, which is dangerous. To solve these problems, it is necessary to study how to reduce the welding work while completing the loading of the chimney section. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide a method for hoisting a chimney section based on structural openings. The method completes numerical control opening when cutting the steel plate, avoiding the welding and cutting work of the lifting lugs or structural lifting lugs in the section stage, saving materials and labor, reducing high-altitude work to ensure personnel safety, reducing paint damage, and improving the integrity of the section.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A method for hoisting a chimney section based on structural openings, which specifically includes the following steps: S1. Determine the structure of the chimney section according to the section division, and determine the mass of the chimney section according to the structure of the chimney section; S2. Determine the hoisting scheme of the chimney section according to the structure and mass information of the chimney section; S3. When the mass of the chimney section is less than or equal to the load of a single gantry crane, use single-machine three-point hoisting or single-machine tandem hoisting to complete the hoisting of the chimney section; S4. When the mass of the chimney section is greater than the load of a single gantry crane, use two-machine tandem hoisting to complete the hoisting of the chimney section.

[0005] Further, the single-machine three-point hoisting of the chimney section specifically includes: S311. Determine the opening position of the upper end surrounding wall of the chimney section and perform opening, and the opening position includes openings on both sides of the upper end surrounding wall of the chimney section; S312. Connect the lifting lugs to the openings through steel wires to complete the hoisting of the chimney section.

[0006] Further, the holes on the upper end of the chimney section in the single-machine three-point lifting are specifically: the holes on the side walls of the upper end of the chimney section, the number of which is 8, the holes on the front wall of the chimney section and the holes on the rear wall of the chimney section are symmetrically arranged, and the number of the holes on the front wall of the chimney section and the holes on the rear wall of the chimney section is 4.

[0007] Further, the single-machine three-point lifting is specifically: the holes on the front wall of the chimney section are connected with the first hook lifting row through the steel wire rope, the holes on the rear wall of the chimney section are connected with the second hook lifting row through the steel wire rope, the holes on the side walls of the upper end of the chimney section are connected with the third hook lifting row, and the lifting of the chimney section is completed by a single gantry crane.

[0008] Further, the single-machine three-point lifting is specifically: S321, the positions of the holes on the upper end of the chimney section are determined and the holes are opened, and the positions of the holes include the holes on the left and right sides of the upper end of the chimney section; S322, the lifting row is connected with the holes through the steel wire rope, and the lifting of the chimney section is completed.

[0009] Further, the holes on the upper end of the chimney section in the single-machine three-point lifting are specifically: the holes on the side walls of the upper end of the chimney section, the number of which is 8, the holes on the front wall of the chimney section and the holes on the rear wall of the chimney section are symmetrically arranged, and the number of the holes on the front wall of the chimney section and the holes on the rear wall of the chimney section is 4.

[0010] Further, the single-machine three-point lifting is specifically: the holes on the front wall of the chimney section are connected with the first hook lifting row through the steel wire rope, the holes on the rear wall of the chimney section are connected with the second hook lifting row through the steel wire rope, the holes on the side walls of the upper end of the chimney section are connected with the third hook lifting row, and the lifting of the chimney section is completed by a single gantry crane.

[0011] Further, the single-machine three-point lifting is specifically: S321, the positions of the holes on the upper end of the chimney section are determined and the holes are opened, and the positions of the holes include the holes on the left and right sides of the upper end of the chimney section; S322, the lifting row is connected with the holes through the steel wire rope, and the lifting of the chimney section is completed.

[0012] Further, the holes on the upper end of the chimney section in the single-machine three-point lifting are specifically: the holes on the side walls of the upper end of the chimney section, the number of which is 8, the holes on the front wall of the chimney section and the holes on the rear wall of the chimney section are symmetrically arranged, and the number of the holes on the front wall of the chimney section and the holes on the rear wall of the chimney section is 4.

[0013] Further, the two-machine combined hoisting chimney section is specifically as follows: two gantry cranes are connected with the left and right enclosing walls of the chimney section for hoisting, the first hook hoisting row and the second hook hoisting row of the first gantry crane are combined and then combined with the third hook hoisting row of the second gantry crane, the first hook hoisting row and the second hook hoisting row of the first gantry crane are connected with the left enclosing wall hole of the upper end of the chimney section through a steel wire rope, the first hook hoisting row and the second hook hoisting row of the second gantry crane are combined and then combined with the third hook hoisting row of the first gantry crane, the first hook hoisting row and the second hook hoisting row of the second gantry crane are connected with the right enclosing wall hole of the upper end of the chimney section through a steel wire rope, and the hoisting of the chimney section is completed through the two gantry cranes.

[0014] Based on the above technical scheme, the method for hoisting a chimney section based on structural opening has the following technical advantages after practical application: 1. The method for hoisting a chimney section based on structural opening avoids the welding and cutting work of the segmented stage hoisting code or the structural hoisting row when the steel plate is cut, saves materials and labor, reduces high-altitude operation, ensures personnel safety, reduces paint damage, and improves the integrity of the section. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a single-machine three-point hoisting schematic diagram in the method for hoisting a chimney section based on structural opening.

[0016] Fig. 2 is a single-machine combined hoisting schematic diagram in the method for hoisting a chimney section based on structural opening.

[0017] Fig. 3 is a two-machine combined hoisting schematic diagram in the method for hoisting a chimney section based on structural opening. DETAILED DESCRIPTION

[0018] To make the purpose, technical scheme and advantages of the present application clearer and more explicit, the present application is described below by specific examples shown in the accompanying drawings However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0019] As Figs. 1-3 shown, a method for hoisting a chimney section based on structural opening, which specifically includes the following steps: S1, determining the structure form of the chimney section 1 according to the section division, and determining the mass of the chimney section 1 according to the structure form of the chimney section 1; S2, determine the hoisting scheme of the chimney section 1 according to the structural form and mass information of the chimney section 1; S3, when the mass of the chimney section 1 is less than or equal to the load of a single gantry crane, the chimney section 1 is hoisted by single-machine three-point hoisting or single-machine line hoisting; S4, when the mass of the chimney section 1 is greater than the load of a single gantry crane, the chimney section 1 is hoisted by two-machine combined hoisting.

[0020] Further, the single-machine three-point hoisting of the chimney section 1 specifically comprises: S311, determine the positions of the openings 14 on the upper end wall of the chimney section 1 and perform the openings 14, the positions of the openings 14 including the openings 14 on the two sides of the upper end wall of the chimney section 1; S312, the line hoist is connected to the openings 14 through steel wires to complete the hoisting of the chimney section 1.

[0021] The openings 14 on the two sides of the upper end wall of the chimney section 1 in the single-machine three-point hoisting specifically comprise: the openings 14 on the side walls of the upper end wall of the chimney section 1, the number of the openings 14 being 8, the openings 14 on the front wall of the chimney section 1 and the rear wall of the chimney section 1 being symmetrically arranged, the number of the openings 14 on the front wall of the chimney section 1 and the rear wall of the chimney section 1 being 4.

[0022] The single-machine three-point hoisting specifically comprises: the openings 14 on the front wall of the chimney section 1 are connected to the first hook line hoist 11 through steel wires, the openings 14 on the rear wall of the chimney section 1 are connected to the second hook line hoist 12 through steel wires, the openings 14 on the side walls of the upper end wall of the chimney section 1 are connected to the third hook line hoist 13, and the chimney section 1 is hoisted by a single gantry crane.

[0023] The single-machine three-point hoisting of the chimney section 1 specifically comprises: S321, determine the positions of the openings 14 on the upper end wall of the chimney section 1 and perform the openings 14, the positions of the openings 14 including the openings 14 on the two sides of the upper end wall of the chimney section 1; S322, the line hoist is connected to the openings 14 through steel wires to complete the hoisting of the chimney section 1.

[0024] The openings 14 on the two sides of the upper end wall of the chimney section 1 in the single-machine line hoisting specifically comprise: the openings 14 on the left side walls of the upper end wall of the chimney section 1, the number of the openings 14 being 8, the openings 14 on the right side walls of the upper end wall of the chimney section 1, the number of the openings 14 being 8.

[0025] The single-machine line hoisting specifically comprises: the openings 14 on the left side walls of the upper end wall of the chimney section 1 are connected to the third hook line hoist 13 through steel wires, the openings 14 on the right side walls of the upper end wall of the chimney section 1 are connected to the line hoist 2 through steel wires, and the line hoist 2 is obtained by combining the first hook line hoist 11 and the second hook line hoist 12.

[0026] The chimney section 1 is hoisted by two cranes. S41, the position of the hole 14 in the upper end of the chimney section 1 is determined and the hole 14 is opened, the position of the hole 14 includes the left and right holes 14 in the upper end of the chimney section 1; S42, the hoisting row is connected with the hole 14 through the steel wire rope, and the hoisting of the chimney section 1 is completed.

[0027] The left and right holes 14 in the upper end of the chimney section 1 are symmetrically opened, and the number of the left and right holes 14 in the upper end of the chimney section 1 is 8 respectively.

[0028] The chimney section 1 is hoisted by two cranes: two gantry cranes are connected with the left and right walls of the chimney section 1 respectively for hoisting, the first hook hoisting row 11 and the second hook hoisting row 12 of the first gantry crane are connected in series and then connected with the third hook hoisting row 13 of the second gantry crane in series, the first hook hoisting row 11 and the second hook hoisting row 12 of the first gantry crane are connected with the left hole 14 in the upper end of the chimney section 1 through the steel wire rope; the first hook hoisting row 11 and the second hook hoisting row 12 of the second gantry crane are connected in series and then connected with the third hook hoisting row 13 of the first gantry crane in series, the first hook hoisting row 11 and the second hook hoisting row 12 of the second gantry crane are connected with the right hole 14 in the upper end of the chimney section 1 through the steel wire rope, and the hoisting of the chimney section 1 is completed through the two gantry cranes.

[0029] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that; the specific embodiments of the application can be modified or some technical features can be replaced by equivalent; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed by the present application. of the present application.

Claims

1. A method for hoisting a chimney section based on structural openings, characterized in that, The method specifically includes the following steps: S1. Based on the division of the chimney into sections, determine the structural form of the chimney sections, and based on the structural form of the chimney sections, determine the mass of the chimney sections. S2. Based on the structural form and mass information of the chimney section, determine the hoisting plan for the chimney section. S3. When the mass of the chimney section is less than or equal to the load of a single gantry crane, the chimney section is hoisted by a single crane at three points or by a single crane in a row. S4. When the mass of the chimney section is greater than the load of a single gantry crane, two cranes are used to lift the chimney section together.

2. The method for hoisting a chimney section based on structural openings according to claim 1, characterized in that, The specific details of the single-machine three-point hoisting of the chimney section are as follows: S311, Determine the location of the opening in the upper wall of the chimney section and make the opening. The opening location includes the openings on both sides of the upper wall of the chimney section. S312, the hoisting rod is connected to the opening via steel wire rope to complete the hoisting of the chimney section.

3. The method for hoisting a chimney section based on structural openings according to claim 2, characterized in that, Specifically, the openings on both sides of the upper wall of the chimney section in the single-machine three-point hoisting are as follows: there are 8 openings on the side wall of the upper wall of the chimney section, and 4 openings on the front wall and the rear wall of the chimney section.

4. The method for hoisting a chimney section based on structural openings according to claim 3, characterized in that, The specific three-point hoisting of the single machine is as follows: the opening on the front wall of the chimney section is connected to the first hook hoisting group through a steel wire rope; the opening on the rear wall of the chimney section is connected to the second hook hoisting group through a steel wire rope; and the opening on the side wall of the upper end of the chimney section is connected to the third hook hoisting group. The chimney section is hoisted by a single gantry crane.

5. The method for hoisting a chimney section based on structural openings according to claim 1, characterized in that, The specific details of the single-unit, multi-row hoisting of the chimney section are as follows: S321, Determine the location of the opening in the upper wall of the chimney section and make the opening. The opening location includes the openings on both sides of the upper wall of the chimney section. S322, the hoisting rod is connected to the opening via steel wire rope to complete the hoisting of the chimney section.

6. The method for hoisting a chimney section based on structural openings according to claim 5, characterized in that, Specifically, the openings on both sides of the upper wall of the chimney section during the single-unit hoisting process are as follows: 8 openings on the left side wall and 8 openings on the right side wall of the upper wall of the chimney section.

7. The method for hoisting a chimney section based on structural openings according to claim 6, characterized in that, The single-unit tandem hoisting is specifically as follows: the left side wall of the upper end of the chimney section is connected to the third hook hoisting bar through a wire rope opening, and the right side wall of the upper end of the chimney section is connected to the tandem hoisting bar through a wire rope opening. The tandem hoisting bar is obtained by connecting the first hook hoisting bar and the second hook hoisting bar.

8. The method for hoisting a chimney section based on structural openings according to claim 1, characterized in that, The specific details of the chimney section hoisted by two machines are as follows: S41, Determine the location of the opening in the upper wall of the chimney section and make the opening. The opening location includes the openings in the left and right walls of the upper part of the chimney section. S42, the hoisting rod is connected to the opening via steel wire rope to complete the hoisting of the chimney section.

9. A method for hoisting a chimney section based on structural openings according to claim 8, characterized in that, The upper left and right walls of the chimney section have symmetrical openings, with 8 openings on each side.

10. A method for hoisting a chimney section based on structural openings according to claim 9, characterized in that, The two-machine joint hoisting of the chimney section specifically involves: two gantry cranes connecting to the left and right walls of the chimney section respectively for hoisting; the first and second hooks of the first gantry crane being connected together, and then connected to the third hook of the second gantry crane; the first and second hooks of the first gantry crane being connected to the opening in the upper left wall of the chimney section via steel wire ropes; the first and second hooks of the second gantry crane being connected together, and then connected to the third hook of the first gantry crane; the first and second hooks of the second gantry crane being connected to the opening in the upper right wall of the chimney section via steel wire ropes; and finally, the chimney section is hoisted using both gantry cranes.

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