阅读说明：本技术 一种lng船三面体的安装方法 (Installation method of trihedron of LNG ship ) 是由 吕军 朱焊烽 刘海洋 林景明 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种LNG船三面体的安装方法,具体包括以下步骤：在LNG船的货舱面上安装临时楔块；利用花篮调节螺栓将三面体固定在锚固扁钢上；将高度模板放置在临时楔块上,调整花篮调节螺栓使高度模板与三面体之间保留8.5mm-9.5mm的间隙；利用三面体多用途工装调整三面体的直线度和角度；利用氩弧焊将三面体与锚固扁钢进行焊接固定。本发明操作简单、便捷,有效地保证了三面体的安装精度和安装质量,减少了工人的返工率,节约了生产劳动力,提高了生产效率。(The invention discloses an installation method of a trihedron of an LNG ship, which specifically comprises the following steps: installing a temporary wedge block on the cargo hold surface of the LNG ship; fixing the trihedral on the anchoring flat steel by using a basket adjusting bolt; placing the height template on a temporary wedge block, and adjusting a basket adjusting bolt to ensure that a gap of 8.5-9.5 mm is reserved between the height template and the trihedron; utilizing a trihedral multipurpose tool to adjust the straightness and angle of the trihedral; and welding and fixing the trihedron and the anchoring flat steel by using argon arc welding. The method is simple and convenient to operate, effectively ensures the mounting precision and the mounting quality of the trihedron, reduces the rework rate of workers, saves the production labor force and improves the production efficiency.)

1. The installation method of the trihedron of the LNG ship is characterized by comprising the following steps:

s1, mounting a temporary wedge block (1) on the cargo hold surface of the LNG ship;

s2, fixing the trihedron (3) on the anchoring flat steel (4) by utilizing the basket adjusting bolt (2);

s3, placing the height template (5) on the temporary wedge block (1), and adjusting the basket adjusting bolt (2) to keep a gap of 8.5-9.5 mm between the height template (5) and the trihedral body (3);

s4, adjusting the straightness and the angle of the trihedron (3) by using the trihedron multipurpose tool (6);

and S5, welding and fixing the trihedron (3) and the anchoring flat steel (4) by argon arc welding.

2. The method for installing the trihedron of the LNG ship according to claim 1, wherein the step S1 of installing the temporary wedge on the cargo deck of the LNG ship comprises the following specific steps:

s11, determining the installation position of the temporary wedge block (1) according to the reference wedge block (7) on the cargo plane;

s12, measuring the thickness of the temporary wedge needed at the installation position of each temporary wedge by using a three-meter ruler, and installing the temporary wedges (1) according to the measurement result to enable the upper end surfaces of all the temporary wedges on the same cargo compartment surface to be positioned on the same plane;

s13, the installed temporary wedges (1) are inspected by using a three-meter ruler, whether the height difference of the upper end faces of all the temporary wedges on the same cargo plane is within 0.5mm or not is judged, if yes, the installation of the temporary wedges meets the requirements, and otherwise, the temporary wedges which do not meet the requirements are adjusted.

3. The installation method of the trihedron of the LNG ship according to claim 1, characterized in that the basket adjusting bolt (2) comprises an adjusting screw body (8), a first clamping head (9) and a second clamping head (10), the first clamping head (9) is arranged at the upper part of the adjusting screw body (8), the second clamping head (10) is arranged at the lower part of the adjusting screw body (8), the clamping mouths of the first clamping head (9) and the second clamping head (10) are opposite in orientation, and a fastening bolt (11) is arranged on each of the first clamping head (9) and the second clamping head (10);

a first chuck (9) of the basket adjusting bolt is clamped on a wing plate of the trihedron (3), and a second chuck clamp (10) of the basket adjusting bolt is clamped on the anchoring flat steel (4).

4. Method for installing a trihedral for an LNG ship according to claim 1, characterized in that the first collets (9) and the second collets (10) are both U-shaped collets.

5. The LNG carrier trihedral installation method according to claim 1, characterized in that the trihedral multipurpose tool (6) comprises a column body (12), a third chuck (13) and a fourth chuck (14), the third chuck (13) is arranged at the upper part of the column body (12), the fourth chuck (14) is arranged at the lower part of the column body (12) through an adjusting bolt (15), the clamping openings of the third chuck (13) and the fourth chuck (14) are perpendicular to each other, and a clamping bolt (16) penetrates through each of the third chuck (13) and the fourth chuck (14).

6. The method for installing the trihedron of the LNG carrier according to claim 5, wherein the specific steps of adjusting the straightness and the angle of the trihedron using the trihedron multipurpose tool in step S4 are as follows:

s41, selecting a plurality of measuring points at the end and the middle of the trihedron (3);

s42, measuring the height from each measuring point to the corresponding cargo plane by using the height template (5) to determine the height deviation of the trihedron; checking the angle of the trihedron by using a square to determine the angle deviation of the trihedron;

s43, laying invar tiles on the trihedral wing plate of the trihedral multipurpose tool to be installed, and clamping a third chuck (13) of the trihedral multipurpose tool on the anchoring flat steel (4) and a fourth chuck (14) on the trihedral wing plate (3);

and S44, adjusting a second adjusting bolt of the trihedral multipurpose tool according to the measured height deviation and angle deviation of the trihedral, so that the height, angle and straightness of the trihedral meet the requirements.

7. Method for installing a trihedral of an LNG ship according to claim 5, characterized in that the third and fourth collets (13, 14) are both U-shaped collets.

8. Method for installing a trihedron of a LNG ship according to claim 1, characterized in that the height form (5) comprises a form body (17), an extension (18) extending outwardly from the upper end surface of the form body (17), the bottom of the form body (17) being provided with a notch (19);

when the height template (5) is placed on the temporary wedge block (1), the extension part (18) of the height template (5) is positioned above the trihedron (3), and a gap of 8.5mm-9.5mm is reserved between the lower end surface of the extension part (18) and the upper end surface of the trihedron (3).

Technical Field

The invention relates to the technical field of ship construction, in particular to an installation method of a trihedron of an LNG ship.

Background

The LNG ship is called as the Mingzhu of the shipbuilding industry, and is a three-high ship type with high technology, high difficulty and high added value, which is recognized in the industry. The key technology and the core process are successfully used for building the pipe fittings of the LNG ship. The welding of the trihedron and the strip in the transverse ring area at the front end and the rear end of the cargo hold of the LNG ship is a work with complex construction process and very high quality control requirement, is a difficult point for cargo hold construction, is also a key point, and has the most construction processes in the trihedron area, the traditional welding process of the trihedron and the strip is complicated, the manual welding is basically needed, and the quality control difficulty of the trihedron is large.

Disclosure of Invention

In view of the above, the present invention provides a method for installing a trihedron of an LNG ship, so as to solve the problems in the background art.

An installation method of a trihedron of an LNG ship specifically comprises the following steps:

s1, installing temporary wedges on the cargo hold surface of the LNG ship;

s2, fixing the trihedral on the anchoring flat steel by utilizing a basket adjusting bolt;

s3, placing the height template on the temporary wedge block, and adjusting the basket adjusting bolt to keep a gap of 8.5-9.5 mm between the height template and the trihedron;

s4, adjusting the straightness and angle of the trihedron by using the trihedron multipurpose tool;

and S5, welding and fixing the trihedron and the anchoring flat steel by argon arc welding.

Preferably, the step S1 of installing the temporary wedge on the cargo deck of the LNG ship includes the following specific steps:

s11, determining the installation position of the temporary wedge block according to the reference wedge block on the cargo compartment surface;

s12, measuring the thickness of the temporary wedge blocks required by the installation positions of the temporary wedge blocks by using a three-meter ruler, and installing the temporary wedge blocks according to the measurement result to enable the upper end surfaces of all the temporary wedge blocks on the same cargo compartment surface to be positioned on the same plane;

and S13, inspecting the installed temporary wedges by using a three-meter ruler, judging whether the height difference of the upper end surfaces of all the temporary wedges on the same cargo hold surface is within 0.5mm, if so, installing the temporary wedges to meet the requirements, otherwise, adjusting the temporary wedges which do not meet the requirements.

Preferably, the basket adjusting bolt comprises an adjusting screw body, a first chuck and a second chuck, the first chuck is arranged at the upper part of the adjusting screw body, the second chuck is arranged at the lower part of the adjusting screw body, the clamping ports of the first chuck and the second chuck face opposite directions, and fastening bolts are arranged on the first chuck and the second chuck in a penetrating manner;

a first chuck of the basket adjusting bolt is clamped on the trihedral wing plate, and a second chuck of the basket adjusting bolt is clamped on the anchoring flat steel.

Preferably, the first and second clips are both U-shaped clips.

Preferably, trihedral multipurpose frock includes shaft, third chuck and fourth chuck, the third chuck sets up in the upper portion of shaft, and the fourth chuck passes through adjusting bolt and sets up in the lower part of shaft, the mouth direction of clamp of third chuck and fourth chuck is mutually perpendicular, all wears to be equipped with clamping bolt on third chuck and the fourth chuck.

Preferably, the specific steps of adjusting the straightness and the angle of the trihedron by using the trihedron multipurpose tool in the step S4 are as follows:

s41, selecting a plurality of measuring points at the end and the middle of the trihedron respectively;

s42, measuring the height from each measuring point to the corresponding cargo plane by using the height template, and determining the height deviation of the trihedron; checking the angle of the trihedron by using a square to determine the angle deviation of the trihedron;

s43, laying invar tiles on the trihedral wing plate on which the trihedral multipurpose tool needs to be installed, clamping a third chuck of the trihedral multipurpose tool on the anchoring flat steel and clamping a fourth chuck on the trihedral wing plate;

and S44, adjusting a second adjusting bolt of the trihedral multipurpose tool according to the measured height deviation and angle deviation of the trihedral, so that the height, angle and straightness of the trihedral meet the requirements.

Preferably, the third and fourth jaws are both U-shaped jaws.

Preferably, the height template comprises a template body and an extension part extending outwards from the upper end surface of the template body, and the bottom of the template body is provided with a notch;

when the height template is placed on the temporary wedge block, the extending part of the height template is positioned above the trihedron, and a gap of 8.5mm-9.5mm is reserved between the lower end face of the extending part and the upper end face of the trihedron.

The invention has the beneficial effects that:

the method is simple and convenient to operate, the temporary wedge blocks are installed on the wall of the cargo compartment, the temporary wedge blocks are used as horizontal reference, and the installation positions of the trihedron are adjusted by utilizing the basket adjusting bolts and the height templates, so that the installation precision and the installation quality of the trihedron are effectively guaranteed, the rework rate of workers is reduced, the production labor force is saved, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a view showing an installation state of the trihedron.

FIG. 2 is a schematic diagram of the structure of a trihedron.

Fig. 3 is a schematic view of temporary wedges and anchoring flats on the cargo deck.

Fig. 4 is a structural schematic diagram of the basket adjusting bolt.

Fig. 5 is a schematic view of the structure of the height template.

FIG. 6 is a front view of a trihedral multipurpose tool.

FIG. 7 is a side view of a trihedral multipurpose tool.

FIG. 8 is a view showing a state of use of the trihedral multipurpose tool.

The reference numerals in the figures have the meaning:

1 is interim voussoir, 2 is basket of flowers adjusting bolt, 3 is the trihedral, 4 is the anchor band steel, 5 is the high template, 6 is trihedral multipurpose frock, 7 is the benchmark voussoir, 8 is the regulation spiral shell body, 9 is first chuck, 10 is the second chuck, 11 is fastening bolt, 12 is the shaft, 13 is the third chuck, 14 is the fourth chuck, 15 is adjusting bolt, 16 is clamping bolt, 17 is the template body, 18 is the extension, 19 is the notch, 20 is the cargo hold face.

Detailed Description

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected" and "fixed" are used in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

The LNG ship generally comprises four cargo holds, wherein each cargo hold is internally provided with 10 cargo hold surfaces, namely an A surface, a B surface, a C surface, a D surface, an E surface, an F surface, a G surface, an H surface, a J surface and a K surface, and a trihedral surface is positioned at the corners of the three cargo hold surfaces and is an important part for bearing and connecting invar pipes between a main membrane and a secondary membrane of the LNG ship liquid cargo hold.

The embodiment of the invention provides an installation method of a trihedron of an LNG ship, which specifically comprises the following steps:

s1, the temporary wedge 1 is installed on the cargo deck of the LNG ship.

Specifically, first, the mounting position of the temporary wedge 1 is determined from the reference wedge 7 on the cargo floor;

then, measuring the thickness of the temporary wedge blocks 1 required by the installation positions of the temporary wedge blocks by using a three-meter ruler, and installing the temporary wedge blocks according to the measurement result to enable the upper end surfaces of all the temporary wedge blocks on the same cargo compartment surface to be positioned on the same plane;

and then, the installed temporary wedge blocks 1 are inspected by using a three-meter ruler, whether the height difference of the upper end surfaces of all the temporary wedge blocks on the same cargo hold surface is within 0.5mm or not is judged, if so, the installation of the temporary wedge blocks meets the requirements, and otherwise, the temporary wedge blocks which do not meet the requirements are adjusted.

And S2, fixing the trihedral 3 to the anchoring flat steel 4 by using the basket adjusting bolt 2.

The basket adjusting bolt 2 comprises an adjusting screw body 8, a first clamping head 9 and a second clamping head 10. The first chuck 9 is arranged at the upper part of the adjusting screw body 8. The second chuck 10 is disposed at the lower portion of the adjusting screw body 8, specifically, the adjusting screw body 8 is composed of a screw rod and an adjusting nut fixed on the screw rod, the upper end of the screw rod is fixed with the first chuck, and the lower end of the screw rod is connected with a connecting rod on the second chuck 10 through the adjusting nut.

The clamping openings of the first clamping head 9 and the second clamping head 10 face opposite directions, and fastening bolts 11 penetrate through the first clamping head 9 and the second clamping head 10. In this embodiment, the first and second clips 9 and 10 are both U-shaped clips.

The first clamp 9 of the basket adjusting bolt is clamped on the wing plate of the trihedron 3, and the second clamp 10 is clamped on the anchoring flat steel 4.

S3, the height form 5 is placed on the temporary chock 1.

The height template 5 comprises a template body 17 and an extension part 18 extending outwards from the upper end face of the template body 17, and a notch 19 is formed in the bottom of the template body 17.

The height form 5 is placed on the temporary chock 1 so that the extension 18 of the height form 5 is above the trihedron 3. Then, the basket adjusting bolt 2 is adjusted to ensure that a gap of 8.5mm-9.5mm is reserved between the lower end surface of the extension part 18 of the height template 5 and the upper end surface of the trihedron 3.

And S4, adjusting the straightness and the angle of the trihedral 3 by using the trihedral multipurpose tool 6.

The trihedral multipurpose tool 6 comprises a column body 12, a third chuck 13 and a fourth chuck 14, wherein the third chuck 13 is arranged at the upper part of the column body 12, the fourth chuck 14 is arranged at the lower part of the column body 12 through an adjusting bolt 15, the clamping openings of the third chuck 13 and the fourth chuck 14 are vertical to each other, and a clamping bolt 16 penetrates through the third chuck 13 and the fourth chuck 14. In this embodiment, third chuck 13 and fourth chuck 14 are both U-shaped chucks.

The method for adjusting the straightness and the angle of the trihedral by using the trihedral multipurpose tool comprises the following specific steps:

s41, selecting a plurality of measuring points at the end and the middle of the trihedron 3;

s42, measuring the height from each measuring point to the corresponding cargo plane by using the height template 5, and determining the height deviation of the trihedron; checking the angle of the trihedron by using a square to determine the angle deviation of the trihedron;

s43, laying invar tiles on the trihedral wing plate on which the trihedral multipurpose tool needs to be installed, clamping the third chuck 13 of the trihedral multipurpose tool on the anchoring flat steel 4 and clamping the fourth chuck 14 on the trihedral 3 wing plate;

and S44, adjusting a second adjusting bolt of the trihedral multipurpose tool according to the measured height deviation and angle deviation of the trihedral, so that the height, angle and straightness of the trihedral meet the requirements.

And S5, welding and fixing the trihedral 3 and the anchoring flat steel 4 by argon arc welding.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.