Method for preassembling energy-saving device on stern shaft tube in segmented mode

Abstract

The invention discloses a method for preassembling an energy-saving device on a stern shaft tube section, which specifically comprises the following steps of: S1, constructing the stern shaft tube section by section, and manufacturing on a straight jig frame by taking a stern shaft tube section bow end rib plate as a base plane; s2, after segmented construction of the stern shaft tube is completed, internal components of the stern shaft tube are installed; hoisting the stern shaft tube; s3, a stern shaft tube segmented outer plate is installed, and a stern shaft tube steel casting is hoisted; s4, the stern shaft tube is subjected to sectional tire release and placed on a preassembled tire frame; s5, an energy-saving device working platform is installed on the segmented outer plate of the stern shaft tube; s6, a mounting position line of the energy-saving device is drawn on the stern shaft tube steel casting; s7, a hoisting installation line is drawn on the energy-saving device, the energy-saving device is hoisted on the steel casting, and allowance trimming is conducted on the energy-saving device; and the energy-saving device is assembled and welded, and segmented preassembling of the energy-saving device is completed. According to the method, the energy-saving device is installed on the segmented side state, so that the construction difficulty during positioning and installation of the energy-saving device is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a method for pre-installing energy-saving devices on a stern tube in sections. Background Art

[0002] With the trend of larger ships, the energy consumption of ships is also increasing. In order to ensure the speed requirements, reduce the energy consumption of ships during operation, and save energy, more and more ship owners choose to install energy-saving devices on the ship's stern tube castings. Energy-saving devices generally adopt an asymmetric structural design and are in a semi-trumpet shape, which increases the difficulty of positioning during installation. When installing in the dock, it is necessary to install it before the segment above the stern tube segment is loaded, otherwise the use of the crane will be easily restricted; when installing in the dock, scaffolding needs to be set up from the bottom of the dock, which is a lot of work, and the paint on the segment is damaged during the dock installation, which increases the dock cycle. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a method for pre-installing an energy-saving device in a stern tube segment. The method of the present invention reduces the construction difficulty of positioning and installing the energy-saving device by installing the energy-saving device in a segmented side state.

[0004] In order to achieve the above invention purpose, the technical solution provided by the present invention is as follows:

[0005] A method for pre-installing an energy-saving device in sections on a stern tube, the method specifically comprising the following steps:

[0006] S1, the stern tube is constructed in sections, and is manufactured on a flat frame with the bow end rib of the stern tube section as the base surface;

[0007] S2, after the stern tube is constructed in sections, install the internal components of the stern tube; hoist the stern tube;

[0008] S3, install the stern tube segment outer plate and hoist the stern tube casting;

[0009] S4, removing the stern tube from the mold in sections and placing them on a pre-installed tire frame, and welding I-beams at the outer plates of the stern tube sections to connect and fix them with the embedded iron of the pre-installed tire frame;

[0010] S5, installing the energy-saving device working platform on the outer plate of the stern tube segment;

[0011] S6, mark the installation position line of the energy-saving device on the stern tube casting;

[0012] S7, mark the hoisting installation line on the energy-saving device, hoist the energy-saving device on the steel casting, and trim the energy-saving device for excess; assemble and weld the energy-saving device to complete the pre-installation of the energy-saving device in sections.

[0013] Furthermore, the internal components of the stern tube segment in S2 include a rib plate subgroup and a platform plate subgroup, the rib plate subgroup includes ribs, stiffeners, platform components and longitudinal quilting components, and the platform plate subgroup includes platform plates and rib plate components.

[0014] Furthermore, when the internal components are assembled, the horizontality deviation of the rib plate is ±2 mm, and the concentricity deviation of the stern shaft hole on the rib plate is not greater than 2 mm.

[0015] Furthermore, the hoisting of the stern tube steel casting in S3 is specifically as follows: arranging lifting rings on the steel casting, the lifting rings are arranged along the centerline of the hull, and the spacing between the lifting rings is greater than 400 mm; after the lifting rings are arranged, hoisting the steel casting on the stern tube through the lifting rings.

[0016] Furthermore, the pre-installed tire frame in S4 is in the form of a dock pier plus an adjustable ground pier, and the dock pier and the adjustable ground pier are arranged at the lower part of the stern tube segment, and the horizontality of the stern tube segment is adjusted by the adjustable ground pier.

[0017] Furthermore, the working platform of the energy-saving device is an arc-shaped plate as a whole, and is connected and fixed to the stern tube segment outer plate and the steel casting by connecting channel steel. The working platform of the energy-saving device is cut into three sections for separate installation. The height difference between the working platform and the lower mouth of the energy-saving device is 500mm, and the gap between the working platform and the outer periphery of the steel casting is 500mm.

[0018] Furthermore, the installation line of the energy-saving device includes the contour line of the steel casting, the center line of the hull and the height center line of the stern tube. The energy-saving device is sequentially drawn with the contour line of the steel casting, the center line of the hull and the height center line of the stern tube from the stern end to the bow end; the energy-saving device is hoisted above the steel casting for installation.

[0019] Furthermore, the outline of the steel casting is drawn in arc shape at intervals of 200 mm along the height of the energy-saving device, and the fin plate of the energy-saving device is trimmed to the required amount according to the drawn outline of the steel casting.

[0020] Based on the above technical solution, the method of pre-installing energy-saving devices in sections of the stern tube in the present invention has achieved the following technical advantages through practical application:

[0021] 1. The method for pre-installing an energy-saving device in sections on a stern tube of the present invention reduces the construction difficulty of positioning and installing the energy-saving device by installing the energy-saving device in a sectioned side state.

[0022] 2. The method of pre-installing the energy-saving device in sections on the stern tube of the present invention is conducive to the rapid positioning and assembly of the energy-saving device by cutting off the excess of the fin of the energy-saving device before installation; the installation platform has a simple structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a three-dimensional structural diagram of a stern tube in a method for pre-installing an energy-saving device in sections of a stern tube.

[0024] Figure 2 The present invention is a structural diagram of a rib plate group in a method for pre-installing an energy-saving device in sections on a stern tube.

[0025] Figure 3 The present invention is a structural diagram of a table panel group in a method for pre-installing an energy-saving device in sections on a stern tube.

[0026] Figure 4 The present invention is a schematic diagram of a pre-installed tire frame in a method for pre-installing an energy-saving device in sections on a stern tube.

[0027] Figure 5 The present invention is a working platform installation structure diagram in a method for pre-installing an energy-saving device in sections on a stern tube.

[0028] Figure 6 The present invention is a top view of a working platform in a method for pre-installing an energy-saving device in sections on a stern tube.

[0029] Figure 7 The invention discloses a schematic diagram of an energy-saving device installation line in a method for pre-installing an energy-saving device in sections on a stern tube. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the 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 invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0031] like Figure 1-7 The present invention relates to a method for pre-installing an energy-saving device in sections on a stern tube, and the method specifically comprises the following steps:

[0032] S1, stern tube section 1 construction, manufactured on a flat frame with the bow end rib of stern tube section 1 as the base surface;

[0033] S2, after the construction of the stern tube section 1 is completed, the internal components of the stern tube 7 are installed; the stern tube 7 is hoisted;

[0034] S3, installing the stern tube segment outer plate 2 and hoisting the stern tube steel casting 8;

[0035] S4, remove the stern tube segment 1 and place it on a pre-installed tire frame, and weld an I-beam at the outer plate 2 of the stern tube segment to connect and fix it with the embedded iron of the pre-installed tire frame;

[0036] S5, installing the energy-saving device working platform 10 on the stern tube segment outer plate 2;

[0037] S6, marking the installation position line of the energy-saving device on the stern tube steel casting 8;

[0038] S7, mark the hoisting installation line on the energy-saving device, hoist the energy-saving device on the steel casting, and trim the energy-saving device for excess; assemble and weld the energy-saving device to complete the pre-installation of the energy-saving device in the segment; by installing the energy-saving device on the side of the segment, the construction difficulty of positioning and installing the energy-saving device is reduced.

[0039] The internal components of the stern tube segment 1 in S2 include a rib plate subgroup and a platform plate subgroup. The rib plate subgroup includes rib plates 3, stiffeners 4, platform plates 5 and longitudinal ribs 6. The platform plate subgroup includes the platform plates and the rib plates 3.

[0040] When the internal components are assembled, the horizontality deviation of the rib plate is ±2 mm, and the concentricity deviation of the stern shaft hole on the rib plate is not greater than 2 mm.

[0041] The hoisting of the stern tube steel casting 8 in S3 is specifically as follows: arranging lifting rings on the steel casting, the lifting rings are arranged along the hull centerline 15, and the spacing between the lifting rings is greater than 400mm; after the lifting rings are arranged, the steel casting is hoisted on the stern tube 7 through the lifting rings.

[0042] The pre-installed tire frame in S4 is in the form of a dock pier 9 plus an adjustable ground pier. The dock pier 9 and the adjustable ground pier are arranged at the lower part of the stern tube segment 1. The horizontality of the stern tube segment 1 is adjusted by adjusting the ground pier.

[0043] The energy-saving device working platform 10 is an arc-shaped plate as a whole. The energy-saving device working platform 10 is connected and fixed to the stern tube segment outer plate 2 and the cast steel by connecting the channel steel 11. The energy-saving device working platform 10 is cut into three sections for separate installation. The height difference between the working platform 10 and the lower mouth of the energy-saving device is 500mm, and the gap between the working platform 10 and the outer periphery of the cast steel is 500mm.

[0044] The energy-saving device installation line includes the outline line 16 of the steel casting, the center line 15 of the hull and the height center line 14 of the stern tube. The energy-saving device is sequentially drawn with the outline line 16 of the steel casting, the center line 15 of the hull and the height center line 14 of the stern tube from the stern end to the bow end; the energy-saving device is hoisted above the steel casting for installation.

[0045] The steel casting contour line 16 is drawn in an arc shape at intervals of 200 mm along the height of the energy-saving device, and the fin plate of the energy-saving device is trimmed to the required amount according to the drawn steel casting contour line 16 .

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention 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 invention 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 invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for pre-installing energy-saving devices in sections of a stern tube, characterized in that: The method specifically comprises the following steps: S1, the stern tube is constructed in sections, and is manufactured on a flat frame with the bow end rib of the stern tube section as the base surface; S2, after the stern tube is constructed in sections, install the internal components of the stern tube; hoist the stern tube; S3, install the stern tube segment outer plate and hoist the stern tube casting; S4, removing the stern tube from the mold in sections and placing them on a pre-installed tire frame, and welding I-beams at the outer plates of the stern tube sections to connect and fix them with the embedded iron of the pre-installed tire frame; S5, installing the energy-saving device working platform on the outer plate of the stern tube segment; S6, mark the installation position line of the energy-saving device on the stern tube casting; S7, mark the hoisting installation line on the energy-saving device, hoist the energy-saving device on the steel casting, and trim the energy-saving device for excess; assemble and weld the energy-saving device to complete the pre-installation of the energy-saving device in sections.

2. A method for pre-installing energy-saving devices in sections of a stern tube according to claim 1, characterized in that: The internal components of the stern tube segment in S2 include a rib plate subgroup and a platform plate subgroup. The rib plate subgroup includes ribs, stiffeners, platform plates and longitudinal quilts. The platform plate subgroup includes platform plates and ribs.

3. A method for pre-installing energy-saving devices in sections of a stern tube according to claim 2, characterized in that: When the internal components are assembled, the horizontality deviation of the rib plate is ±2 mm, and the concentricity deviation of the stern shaft hole on the rib plate is not greater than 2 mm.

4. The method for pre-installing energy-saving devices in sections of a stern tube according to claim 1, characterized in that: The hoisting of the stern tube steel casting in S3 is specifically as follows: arranging lifting rings on the steel casting, the lifting rings are arranged along the centerline of the hull, and the spacing between the lifting rings is greater than 400mm; after the lifting rings are arranged, the steel casting is hoisted on the stern tube through the lifting rings.

5. The method for pre-installing energy-saving devices in sections of a stern tube according to claim 1, characterized in that: The pre-installed tire frame in S4 is in the form of a dock pier plus an adjustable ground pier. The dock pier and the adjustable ground pier are arranged at the lower part of the stern tube segment, and the horizontality of the stern tube segment is adjusted by adjusting the ground pier.

6. The method for pre-installing energy-saving devices in sections of a stern tube according to claim 1, characterized in that: The working platform of the energy-saving device is an arc-shaped plate as a whole. The working platform of the energy-saving device is connected and fixed to the stern tube segment outer plate and the steel casting by connecting channel steel. The working platform of the energy-saving device is cut into three sections for separate installation. The height difference between the working platform and the lower mouth of the energy-saving device is 500mm, and the gap between the working platform and the outer periphery of the steel casting is 500mm.

7. The method for pre-installing energy-saving devices in sections of a stern tube according to claim 1, characterized in that: The energy-saving device installation line includes the outline of the steel casting, the center line of the hull and the height center line of the stern tube. The energy-saving device is sequentially drawn with the outline of the steel casting, the center line of the hull and the height center line of the stern tube from the stern end to the bow end; the energy-saving device is hoisted above the steel casting for installation.

8. The method for pre-installing energy-saving devices in sections of a stern tube according to claim 7, characterized in that: The outline of the steel casting is drawn in arc shape at intervals of 200 mm along the height of the energy-saving device, and the fin plate of the energy-saving device is trimmed to the required amount according to the outline of the steel casting.

Images