阅读说明：本技术 一种多用途重吊船支撑块箱在分段上的安装方法 (Method for installing multipurpose heavy lift vessel supporting block box on subsection ) 是由 刘璐 吴维真 朱斌 李国城 于 2021-06-28 设计创作，主要内容包括：本发明涉及一种多用途重吊船支撑块箱在分段上的安装方法,该方法包括：S1、支撑块箱精度检验；S2、舱口围中组和主胎架大组分开建造,以舱口围中组上口舱口围顶板为基准边进行构架划线；S3、在主胎架大组上以主甲板理论线为基准边进行支撑块箱定位划线,将支撑块箱预埋在主胎架大组上；S4、将舱口围中组和主胎架大组合拢形成分段,以舱口围顶板为基准边进行划线复检,检验支撑块箱的安装精度；S5、验收合格后支撑块箱焊接固定。通过本发明的方法,有效控制支撑块箱在分段上的安装精度,减少支撑块箱在分段及总组阶段的变形矫正工作量,缩短建造周期。(The invention relates to a method for installing a multipurpose heavy lift vessel supporting block box on a section, which comprises the following steps: s1, checking the precision of the supporting block box; s2, constructing a middle hatch coaming group and a large main jig frame group separately, and marking out a frame by taking a top plate of the upper hatch coaming of the middle hatch coaming group as a reference edge; s3, positioning and marking out supporting block boxes on the main jig frame large group by taking the main deck theoretical line as a reference edge, and embedding the supporting block boxes on the main jig frame large group; s4, combining the hatch coaming middle group and the main tire frame into segments, marking and rechecking by taking the hatch coaming top plate as a reference edge, and checking the mounting accuracy of the supporting block box; and S5, welding and fixing the supporting block box after the acceptance is qualified. By the method, the installation precision of the supporting block box on the subsection is effectively controlled, the deformation correction workload of the supporting block box in the subsection and the total assembly stage is reduced, and the construction period is shortened.)

1. A method of installing a multipurpose heavy lift vessel support block box on a segment, the method comprising:

s1, checking the precision of the supporting block box;

s2, constructing a middle hatch coaming group and a large main jig frame group separately, and marking out a frame by taking a top plate of the upper hatch coaming of the middle hatch coaming group as a reference edge;

s3, positioning and marking out supporting block boxes on the main jig frame large group by taking the main deck theoretical line as a reference edge, and embedding the supporting block boxes on the main jig frame large group;

s4, combining the hatch coaming middle group and the main tire frame into segments, marking and rechecking by taking the hatch coaming top plate as a reference edge, and checking the mounting accuracy of the supporting block box;

and S5, welding and fixing the supporting block box after the acceptance is qualified.

2. A method of installing a multipurpose crane support block box on a segment as claimed in claim 1, wherein the support block box is installed at the location of the opening by determining the location and size of the opening from the support block box locating score line at S3.

3. The method of claim 1, wherein the welded joint designation is performed according to an assembly drawing after the frame is hoisted in place according to frame marking lines.

4. The method of claim 1, wherein the re-inspection is performed by using steel strip scoring, wherein the steel strip scoring adds a weld shrinkage value, wherein the scoring adds a 1mm weld shrinkage value to each weld, and wherein the scoring adds a 2mm weld shrinkage value to each support block box.

5. The method for installing a multipurpose crane ship support block box on a subsection as claimed in claim 1, wherein the subsection is constructed in a lateral state with an inner longitudinal wall plate of a group in a hatch coaming as a base surface when the support block box is welded, the support block box and the inner longitudinal wall plate are tack-welded, and the support block box and the inner longitudinal wall plate are welded and fixed after the subsection is normally placed in a turning state.

6. The method as claimed in claim 5, wherein the butt welding between the support block box and the inner longitudinal wall is performed first, and the welding between the support block box and the inner longitudinal wall is performed symmetrically by the sectional welding.

7. The method for installing the multipurpose crane ship support block box on the subsection as claimed in claim 1, wherein the support block box precision detection comprises flatness detection and sample punching point precision detection, wherein the flatness error is not more than 3mm per square meter, and the sample punching point deviation is not more than 1 mm.

8. A method of installing a multipurpose crane support block box on a segment as claimed in claim 1 wherein the frame score line has an error of no more than 1 mm.

Technical Field

The invention relates to the field of ship construction, in particular to a method for installing a multipurpose heavy lift vessel supporting block box on a section.

Background

In the process of building the multipurpose heavy lift vessel, the mounting precision of the support block box is a key ring for building the heavy lift vessel, the support block box is generally manufactured and completed by a manufacturer and then is mounted on site, the mounting precision of the support block box has an important influence on the subsequent operation of the heavy lift vessel, and the mounting precision of the support block box influences the folding of the whole subsection and the subsequent total section, so that the control of the assembling precision and the welding precision of the support block box is a key for process control.

Disclosure of Invention

A method of installing a multipurpose heavy lift vessel support block box on a segment, the method comprising:

s1, checking the precision of the supporting block box;

s2, constructing a middle hatch coaming group and a large main jig frame group separately, and marking out a frame by taking a top plate of the upper hatch coaming of the middle hatch coaming group as a reference edge;

s3, positioning and marking out supporting block boxes on the main jig frame large group by taking the main deck theoretical line as a reference edge, and embedding the supporting block boxes on the main jig frame large group;

s4, combining the hatch coaming middle group and the main tire frame into segments, marking and rechecking by taking the hatch coaming top plate as a reference edge, and checking the mounting accuracy of the supporting block box;

and S5, welding and fixing the supporting block box after the acceptance is qualified.

Further, in S3, the position and size of the opening are determined based on the support block box positioning scribe line, and the support block box is mounted at the position of the opening.

Further, after the framework is hoisted in place according to the framework scribing line, welding node marking is carried out according to an assembly drawing.

Furthermore, steel belt marking is adopted during rechecking, welding shrinkage values are added into the steel belt marking, 1mm welding shrinkage values are added into each welding line during marking, and 2mm welding shrinkage values are added into each supporting block box.

Furthermore, when the supporting block box is welded, the sections are built in a side state by taking the inner longitudinal wall plates of the hatch coaming as base planes, the supporting block box and the inner longitudinal wall plates are welded in a positioning mode, and the supporting block box and the inner longitudinal wall plates are welded and fixed after the sections are turned over and normally placed.

Furthermore, butt welding between the supporting block box and the inner longitudinal wall is firstly carried out during welding, and the supporting block box and the inner longitudinal wall are symmetrically welded in a sectional welding mode during welding.

Furthermore, the precision detection of the supporting block box comprises flatness detection and sample punching point precision detection, wherein the flatness error is not more than 3mm per square meter, and the sample punching point deviation is not more than 1 mm.

Further, the frame score line has an error of not more than 1 mm.

Compared with the prior art, the method has the advantages that the method effectively controls the installation precision of the supporting block box on the subsection, reduces the deformation correction workload of the supporting block box in the subsection and the total assembly stage, and shortens the construction period.

Drawings

FIG. 1 is a sectional view of a segmented structure according to the present invention.

FIG. 2 is a plan view of the inner longitudinal wall of the present invention.

FIG. 3 is a schematic view of the support block box weld of the present invention.

In the figure, 1, supporting the block box; 2. a hatch coaming top panel; 3. a main deck theoretical line; 4. opening a hole; 5. a middle group of hatch coamings; 6. a main jig frame large group; 7. an inner longitudinal wall panel.

Detailed Description

The technical solution of the present invention is further described below with reference to specific embodiments:

a method of installing a multipurpose crane support block box on a segment, as shown in figures 1-3, the method comprising:

s1, checking the precision of the supporting block box: according to the installation precision requirement of the supporting block box on the segment, the supporting block box needs to be subjected to precision acceptance check after being transported to an assembly site from a manufacturer, and the acceptance check comprises the acceptance check of the flatness of the inner longitudinal wall surface of the supporting block box, the acceptance check of the sample punching point precision of the supporting block box and the acceptance check of the structure precision of the supporting block box; the flatness acceptance is measured by matching a 3-meter straight ruler with a plug ruler, and the flatness error is not more than 3mm per square meter; the sample punching point precision inspection is carried out in a mode of carrying out on-site line snapping inspection according to the opening on the supporting block box, the sample punching point is the central point of the opening on the side of the longitudinal wall in the supporting block box, and the deviation of the sample punching point is not more than 1 mm; and checking the manufacturing precision of the supporting block box according to a supporting block box design manufacturing drawing, wherein the manufacturing precision comprises the framework interval, the inclined side wall angle and the flatness.

S2, the sections comprise a hatch coaming middle group and a main tire frame big group, the hatch coaming middle group and the main tire frame big group are separately built, the hatch coaming middle group and the main tire frame big group are used for carrying out frame scribing by taking a hatch coaming top plate of an upper opening of the hatch coaming middle group as a reference edge, the frame scribing error is not more than 1mm, and the frame installation is ensured not to influence the installation of the supporting block box.

S3, positioning and marking out the supporting block box on the main jig frame group by taking the main deck theoretical line as a reference edge, determining the position and the size of an opening on the main deck according to the positioning and marking out, performing self-checking and mutual inspection on a construction party during marking out, confirming on site by technicians, opening the opening after no mistake is confirmed, embedding the supporting block box according to the position of the opening, hoisting the supporting block box before hoisting the framework, avoiding deformation of the framework caused by later hoisting, and further improving hoisting safety and construction efficiency; and after the supporting block box is hoisted, hoisting the framework in place according to the framework marking line, marking the welding nodes according to the assembly drawing, facilitating subsequent welding work and ensuring the welding quality.

S4, combining the hatch coaming middle group and the main jig frame to form a subsection, scribing and adjusting precision by taking the hatch coaming top plate as a reference edge, specifically scribing by taking the hatch coaming top plate as a reference edge according to the positioning position of an outfitting installation drawing, namely measuring whether the distance between the hatch coaming top plate and a supporting block box positioning line meets the drawing requirement, and trimming errors caused by assembling, hoisting, electric welding and the like; the marking-out adopts steel belt marking-out, the steel belt for marking-out needs to be added with a welding contraction value in consideration of electric welding heat input of the supporting block box and surrounding components, the welding contraction value is determined according to the number of butt welding seams of the inner longitudinal wall of the supporting block box and the hatch coaming, 1mm welding contraction value is added into each welding seam, 2mm welding seam contraction value is added into each supporting block box, and finally, a precision department adopts precision equipment such as a laser theodolite to check and accept the supporting block box.

S5, when the supporting block box is welded, before the subsection turns over, the supporting block box and the surrounding area thereof are not welded within 1m, only tack welding is carried out, the tack welding is required to ensure the turning over and hoisting safety, and after the subsection turns over, the supporting block box and the inner longitudinal wall plate are welded and fixed.

In the welding process, butt welding between the supporting block box and the inner longitudinal wall is firstly carried out, a sectional welding and symmetrical welding method is adopted, the welding sequence is shown in figure 3, and welding deformation is avoided.

The present invention is further explained and not limited by the embodiments, and those skilled in the art can make various modifications as necessary after reading the present specification, but all the embodiments are protected by the patent law within the scope of the claims.