WO2020088237A1 - 一种回转式空预器的转子隔板的焊接安装工艺 - Google Patents

一种回转式空预器的转子隔板的焊接安装工艺 Download PDF

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Publication number
WO2020088237A1
WO2020088237A1 PCT/CN2019/111186 CN2019111186W WO2020088237A1 WO 2020088237 A1 WO2020088237 A1 WO 2020088237A1 CN 2019111186 W CN2019111186 W CN 2019111186W WO 2020088237 A1 WO2020088237 A1 WO 2020088237A1
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welding
separators
group
cylinder
central cylinder
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PCT/CN2019/111186
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English (en)
French (fr)
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王建勇
张俭平
庞继勇
于群
邵德让
曲克刚
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中国电建集团山东电力建设第一工程有限公司
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Publication of WO2020088237A1 publication Critical patent/WO2020088237A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts

Definitions

  • the invention relates to the technical field of installation of a rotor of a rotary air preheater, in particular to a welding installation process of a rotor partition of a rotary air preheater.
  • the rotor of the rotary air preheater is mainly composed of a central cylinder and a fan partition
  • the bin and the heat transfer element are composed of a fan-shaped partition that is surrounded by two adjacent partitions that are evenly distributed radially around the central cylinder. Due to the large size of the rotary air preheater rotor, on-site welding and installation of the air preheater rotor is usually required on site.
  • the installation of the rotor compartment of the rotary air preheater adopts the sequential installation method, and the welding of the compartment partition and the central cylinder usually adopts intermittent welding and jump welding.
  • the present invention proposes a welding installation process of the rotor diaphragm of the rotary air preheater, which can realize the overall symmetric welding of the diaphragm on the rotor, and the present invention can minimize the prior art Deformation in welding.
  • a welding installation process of a rotor separator of a rotary air preheater includes a central cylinder and a plurality of groups of separators, each group of separators includes four separators, and a clamp between two adjacent separators in each group of separators The angle is 90 °, and the welding of multiple sets of separators includes the following steps:
  • Each separator in the second group of separators is in the middle of two adjacent separators in the first group of separators, and the second group of separators is welded in the welding order of the first group of separators;
  • N groups of separators between the second group of separators and the first group of separators clockwise are evenly distributed clockwise along the circumferential direction of the central cylinder, N is an even number, and these N groups of separators are arranged clockwise
  • the hour hand is welded along the circumferential direction of the central cylinder to the cylinder wall of the central cylinder, and each group of the N groups of separators is welded in the welding order of the first group of separators;
  • N groups of separators between the first group of separators and the second group of separators that are clockwise adjacent are evenly distributed counterclockwise along the circumferential direction of the central cylinder, N is an even number, and the N groups of separators are reversed
  • the hour hand is welded along the circumferential direction of the central cylinder to the cylinder wall of the central cylinder, and each group of the N groups of separators is welded in the welding order of the first group of separators.
  • each separator includes the following steps:
  • the welding uses manual arc welding.
  • the welding adopts multi-layer multi-pass welding.
  • the interlayer temperature during welding is not greater than 400 ° C.
  • the welding uses a welding rod with the brand of J507.
  • the electrode diameter of the bottom welding is 3.2 mm
  • the diameter of the electrode of the filling welding and the cover welding is 3.2 mm
  • the thickness of the single layer of the weld bead is not greater than the diameter of the electrode used
  • the width of the single bead is not greater than the diameter of the electrode used
  • the process should be the same as the formal welding, the positioning block should be evenly arranged on the entire weld, and no less than three; set the arc starting plate and the arc extinguishing plate; during the welding process, the joints of each layer of weld should be staggered 10- 15mm; the welding slag and spatter on the surface of the welding seam must be cleaned after each layer of welding.
  • the first separator is welded symmetrically on both sides of the center cylinder, and then two other separators symmetrically on both sides of the center cylinder are welded, and each The angle between the two adjacent separators in the group of separators is 90 °, so it can offset the welding deformation caused by the symmetrical separators on the two sides of the central cylinder that are welded first; when welding the second group of separators, the second group of separators
  • Each baffle in the board is in the middle of two adjacent baffles in the first set of baffles.
  • the line of the baffles on both sides of the central barrel divides the central barrel into eight Equal parts, so that when the separator outside the center cylinder wall is welded, it continuously offsets the welding deformation of the previous pair of separators; when welding in accordance with steps (3) and (4), the N group of separators in step (4)
  • the number of N barriers in the plate and step (3) are the same, and the N groups of separators in step (3) are welded clockwise, and the N groups of separators in step (4) are welded counterclockwise, so step (4) can cancel Remove the welding deformation generated in step (3).
  • the overall symmetric welding of the partition plate on the rotor is realized, which can minimize the welding deformation in the prior art;
  • the welding deformation generated in the process is corrected to improve the overall stress state, and the cylindrical shape of the rotor of the rotary air preheater is maintained, so that the rotor can keep parallel during operation, reduce friction, and avoid deviation of the surrounding belt;
  • the precision of the adjustment of the similar sealing gap is improved, reducing the amount of air leakage, improving the output and economic operation of the unit; and making the installation of heat exchange elements easier and shortening the construction period; meeting the installation quality requirements of the rotor of the rotary air preheater, especially suitable for the quadrant Welding installation of the partition board of the air preheater rotor.
  • the two spaced parts symmetrically located on both sides of the intermediate position of the separator are welded to the cylinder wall of the central cylinder, and so on, and the separator is welded to the cylinder wall of the central cylinder.
  • the single baffle can be completely welded to the cylinder wall of the central cylinder, which improves the welding firmness of the single baffle on the central cylinder, thereby improving the firmness of the rotary air preheater rotor.
  • Manual arc welding has the advantages of simple equipment, flexible operation, and strong adaptability. It can be welded wherever the electrode can reach, especially suitable for the partition of the rotary air preheater rotor, which requires on-site welding and installation occasion.
  • Multi-pass welding is the welding performed by more than two weld passes to complete the entire weld; Multi-layer welding is welding by depositing more than two weld layers to complete the entire weld; Multi-layer welding and multi-pass welding The relationship is: multi-layer welding includes multi-layer single-pass welding and multi-layer multi-pass welding. A layer of weld can be composed of several passes.
  • multi-layer welding can weld large thick wall structures, especially the volume of the rotary air pre-rotor Larger structure, compared with the use of single-layer welding, multi-layer welding can also reduce heat input, reduce deformation, and reduce the probability of defects, so manual arc welding uses multi-layer multi-pass welding.
  • the inter-layer temperature during welding is not more than 400 ° C, which can improve the weld strength and low-temperature impact heat.
  • welding electrode of the brand J507 is used for welding, and its model is E5015.
  • This alkaline electrode has excellent plasticity, toughness and crack resistance.
  • Figure 1 is a schematic diagram of the welding position sequence of all the partitions and the central cylinder
  • Fig. 2 is a schematic diagram of the welding position sequence of a single partition plate and a central cylinder.
  • a welding installation process for the rotor separator of a rotary air preheater includes a central cylinder and six groups of separators, each group of separators includes four separators, and the angle between adjacent two separators of each group of separators It is 90 °, as shown in Figure 1, the welding of six sets of separators includes the following steps:
  • Preparation before welding remove rust, moisture and dirt within 20mm from the groove surface and both sides of the groove, and should be fully dried, prepare arc starting plate and arc extinguishing plate.
  • the groove refers to the groove processed by the center cylinder and the separator at the position to be welded, and the groove surface refers to the groove surface of the center cylinder and the separator. Cleaning the groove surface can reduce the occurrence of welding defects and improve the welding effect. ; Prepare the arc starting plate and the arc extinguishing plate, which can avoid the arc starting and extinguishing on the central tube or the partition or the weld bead, so as to avoid damage to the central tube or the partition or reduce the welding quality.
  • Welding electrode with brand J507 is used for welding, and its model is E5015.
  • the diameter of the bottom electrode is 3.2mm, and the diameter of the filler electrode and cover electrode is 3.2mm. Check whether the electrode size is correct. Improve welding efficiency and welding accuracy.
  • the welding rod with the brand of J507, the model of which is E5015 has excellent plasticity, toughness and crack resistance. Because the electrode diameter of the bottom welding is 3.2mm, the diameter of the electrode of the filler welding and the cover welding is 3.2mm, the single layer thickness of the welding bead is not greater than the diameter of the electrode used; the width of the single electrode is not more than 3 times the diameter of the electrode Therefore, the separator can be welded more firmly.
  • Each separator in the second group of separators is in the middle of two adjacent separators in the first group of separators.
  • Plate 2c-2c ' is welded to the cylinder wall of the central cylinder, and then the other two separators 2d-2d' symmetrically located on both sides of the central cylinder are welded to the cylinder wall of the central cylinder; After the plates are welded, the center cylinder is divided into eight equal parts. Because each partition in the second group of partitions is in the middle of two adjacent partitions in the first group of partitions, the line connecting the two partitions symmetrically on both sides of the central cylinder divides the central cylinder into eight equal parts To maintain the overall symmetrical welding.
  • Each group of these two groups of separators is welded according to the welding order of the first group of separators; specifically, in accordance with 3e-3e ', 3f-3f', 4g -The order of 4g ', 4h-4h' is welded to the cylinder wall of the central cylinder; the two separators 3f-3f 'symmetrically on both sides of the central cylinder offset the welding deformation of the two separators 3e-3e' symmetrically on both sides of the central cylinder , The two separators 4h-4h 'symmetrically on both sides of the central cylinder counteract the welding deformation of the two separators 4g-4g' symmetrically on both sides of the central cylinder.
  • the two groups of separators between the first group of separators and the second group of separators that are clockwise adjacent are evenly distributed counterclockwise along the circumferential direction of the central cylinder, and the two groups of separators are counterclockwise along the center
  • the circumferential direction of the cylinder is welded to the cylinder wall of the central cylinder.
  • Each group of the two groups of separators is welded in the welding order of the first group of separators. Specifically, it is welded to the cylinder wall of the central cylinder in the order of 5i-5i ', 5j-5j', 6k-6k ', 6l-6l' in this order.
  • the two separators 5j-5j 'symmetrically located on both sides of the center cylinder offset the welding deformation of the two separators 5i-5i' symmetrically located on both sides of the center cylinder Welding deformation of the two separators 6k-6k 'on both sides of the central cylinder; because, the two separators 5i-5i' and the two separators 3e-3e 'are symmetrical with the two separators 2c-2c' and the two separators 5j-5j ' And the two separators 3f-3f 'are symmetrical with the two separators 2d-2d', so the group of separators 5i-5i 'and 5j-5j' offset the welding of the group of separators 3e-3e 'and 3f-3f' Deformation; because, two separators 6k-6k 'and two separators 4g-4g' are symmetrical with two separators 2c-2c ', two separators 6l-6l' and two separators 4h
  • each welding includes the following steps when welding:
  • multi-layer multi-pass welding is adopted for welding.
  • the welding rod with the brand of J507 is used for welding
  • the diameter of the welding rod for the bottom welding is 3.2mm
  • the diameter of the welding rod for the filling welding and the cover welding is 3.2mm
  • the single layer thickness of the welding bead is not greater than the diameter of the welding rod used
  • the width of the track is not more than 3 times the diameter of the electrode used.
  • the interlayer temperature during welding is not greater than 400 ° C.
  • the welding of tack welding and tooling should be performed by a qualified welder, and the welding process should be the same as that of formal welding; during the welding process, the joints of each layer of welding pass should be staggered by 10-15mm; Clean up the welding slag and spatter on the surface of the welding seam.
  • the sub-layer welding can be carried out; the process and material of the positioning welding are consistent with the formal welding requirements, and the positioning block should be evenly arranged on the entire welding seam, and Not less than three.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Arc Welding In General (AREA)

Abstract

一种回转式空预器的转子隔板的焊接安装方法，包括步骤：(1)将第一组隔板中两个对称处于中心筒两侧的隔板与中心筒的筒壁焊接，再将第一组隔板中的另外两个对称处于中心筒两侧的隔板与中心筒的筒壁焊接；(2)第二组隔板中的每一个隔板均处于第一组隔板中相邻两个隔板的中间位置，第二组隔板按照第一组隔板的焊接顺序焊接；(3)处于顺时针相邻的第二组隔板和第一组隔板之间的N组隔板顺时针沿着中心筒的圆周方向均匀分布；(4)处于顺时针相邻的第一组隔板和第二组隔板之间的N组隔板逆时针沿着中心筒的圆周方向均匀分布。该焊接方法能够实现隔板的整体对称焊接，最大限度地减少现有技术中的焊接变形。

Description

一种回转式空预器的转子隔板的焊接安装工艺 技术领域
本发明涉及回转式空预器转子的安装技术领域，具体涉及一种回转式空预器的转子隔板的焊接安装工艺。
 背景技术
随着电力技术的发展及国家节能减排政策的提出，结构紧凑、重量轻的回转式空预器在我国大容量机组中得以广泛投入应用，回转式空预器转子主要由中心筒、扇形隔仓和传热元件组成，扇形隔仓是由围绕中心筒的圆周方向放射状均匀分布的相邻两个隔板围成。由于回转式空预器转子的尺寸较大，通常需要在现场进行空预器转子的现场焊接安装。现有技术中，回转式空气预热器转子隔仓的安装采用顺序安装法，隔仓隔板和中心筒的焊接通常采用间断焊、跳焊的方式。
 技术问题
使用现有技术进行回转式空预器转子的隔仓隔板的安装，其焊接变形难以控制，使圆柱形转子变形成椭圆柱形，转子运行时不平行产生摩擦，围带跑偏；使得回转式空预器各类密封间隙的调整精度降低，漏风量增加，严重影响机组出力和经济运行；而且隔仓隔板焊接变形使得换热元件安装困难，施工工期增长；难以满足回转式空预器转子的安装质量要求。
 技术解决方案
本发明针对现有技术存在的上述不足，提出一种回转式空预器的转子隔板的焊接安装工艺，能够实现对转子上隔板的整体对称焊接，本发明能够最大限度地减少现有技术中的焊接变形。
为了实现上述目的，本发明采用的技术方案是：
一种回转式空预器的转子隔板的焊接安装工艺，包括中心筒和多组隔板，每组隔板包括四个隔板，每组隔板中相邻两个隔板之间的夹角为90°，多组隔板的焊接包括如下步骤：
（1）先将第一组隔板中两个对称处于中心筒两侧的隔板与中心筒的筒壁焊接，再将第一组隔板中的另外两个对称处于中心筒两侧的隔板与中心筒的筒壁焊接；
（2）第二组隔板中的每一个隔板均处于第一组隔板中相邻两个隔板的中间位置，第二组隔板按照第一组隔板的焊接顺序焊接；
（3）处于顺时针相邻的第二组隔板和第一组隔板之间的N组隔板顺时针沿着中心筒的圆周方向均匀分布，N为偶数，且这N组隔板顺时针沿着中心筒的圆周方向与中心筒的筒壁焊接，这N组隔板中的每组隔板按照第一组隔板的焊接顺序焊接；
（4）处于顺时针相邻的第一组隔板和第二组隔板之间的N组隔板逆时针沿着中心筒的圆周方向均匀分布，N为偶数，且这N组隔板逆时针沿着中心筒的圆周方向与中心筒的筒壁焊接，这N组隔板中的每组隔板按照第一组隔板的焊接顺序焊接。
进一步的，所述每个隔板的焊接包括如下步骤：
（1）将处于隔板中间位置的一部分与中心筒的筒壁焊接；
（2）将对称处于隔板中间位置两侧的两部分与中心筒的筒壁间隔焊接，沿着远离隔板中间位置的方向依次类推；
（3）沿着远离隔板中间位置的方向，将对称处于隔板中间位置两侧的两间隔部分与中心筒的筒壁焊接，依次类推，将隔板与中心筒的筒壁焊接。
进一步的，所述焊接采用手工电弧焊。
进一步的，所述焊接采取多层多道焊。
进一步的，所述焊接时的层间温度不大于400℃。
进一步的，在所述多组隔板的焊接前，需要依次进行如下步骤：焊前准备、编号和尺寸检查；
在所述多组隔板的焊接后，还需依次进行如下步骤：外观检查、验收、技术记录和资料整理。
进一步的，所述焊接采用牌号为J507的焊条。
进一步的，打底焊的焊条直径为3.2mm，填充焊和盖面焊的焊条直径均为3.2mm；焊道的单层增厚不大于所用焊条直径，单焊道宽度不大于所用焊条直径的3倍焊接前应检查组装质量；清除坡口面及坡口两侧20mm范围内铁锈、水分和污物，并应充分干燥；定位焊及工卡具的焊接，应由合格焊工担任，其焊接工艺应与正式焊接相同，定位块应均匀地布置在整条焊缝上，且不少于三块；设置引弧板和熄弧板；焊接过程中，每层焊道的接头应错开10-15mm；每焊完一层都要清理干净焊缝表面的焊渣和飞溅等，检查合格后，方可进行次层焊接。
 有益效果
1、由于第一组隔板是两两对称焊接，在第一最隔板中先焊接对称处于中心筒两侧的隔板，再焊接另外两个对称处于中心筒两侧的隔板，且每组隔板中相邻两个隔板的夹角是90°，所以能够抵消先焊接的对称处于中心筒两侧隔板产生的焊接变形；当焊接第二组隔板时，由于第二组隔板中的每个隔板均处于第一组隔板中相邻两个隔板的中间位置，第二组隔板焊接完后，处于中心筒两侧的隔板的连线将中心筒分成八等份，使中心筒筒壁外的隔板在焊接时，不断抵消上一对隔板的焊接变形；按照步骤（3）和步骤（4）进行焊接时，步骤（4）中的N组隔板和步骤（3）中的N阻隔板数量相同，而且步骤（3）中N组隔板是顺时针焊接，步骤（4）中N组隔板是逆时针焊接，所以步骤（4）能够抵消掉步骤（3）产生的焊接变形。
所以按照本发明的方法焊接安装回转式空预器转子的隔仓隔板时，实现了对转子上隔板的整体对称焊接，能够最大限度地减少现有技术中的焊接变形；不断对焊接过程中产生的焊接变形进行修正，改善整体的应力状态，保持了回转式空预器转子的圆柱形，使转子在运行能够保持平行，减少摩擦，避免围带跑偏；使得回转式空预器各类密封间隙的调整精度提高，减少漏风量，提高机组出力和经济运行；而且使得换热元件安装更简便，缩短施工工期；满足回转式空预器转子的安装质量要求，尤其适用于四分仓空预器转子的隔仓隔板的焊接安装。
2、对单个隔板焊接时，因为先将处于隔板的中间位置的一部分与中心筒的筒壁焊接；再将对称处于隔板的中间位置两侧的两部分与中心筒的筒壁间隔焊接，沿着远离隔板的中间位置的方向依次类推；所以此时单个隔板与中心筒之间的焊接位置呈现间隔性焊缝，这种对称间断焊接的方式，不仅可以抵消对称位置产生的焊接应力，能够最大限度地减小单个隔板在焊接时的焊接变形，提高单个隔板的焊接质量，而且具有间断焊接能够减少焊接变形的优点。又因为沿着远离隔板的中间位置的方向，将对称处于隔板的中间位置两侧的两间隔部分与中心筒的筒壁焊接，依次类推，将隔板与中心筒的筒壁焊接。能够将单个隔板与中心筒的筒壁完全焊接住，提高单个隔板在中心筒上的焊接牢固程度，进而提高回转式空预器转子的牢固程度。
3、手工电弧焊具有设备简单，操作灵活，适应性强的优点，凡焊条能够到达的地方都能进行焊接，尤其适用于回转式空预器转子的隔仓隔板这种需要现场焊接安装的场合。
4、多道焊是由两条以上焊道完成整条焊缝所进行的焊接；多层焊是熔敷两个以上焊层完成整条焊缝所进行的焊接；多层焊与多道焊的关系是：多层焊包括多层单道焊和多层多道焊，一层焊缝可以由若干道焊道组成。由于中心筒的筒壁与隔板之间的坡口角度较大，所以需要使用多道焊进行熔敷；而且多层焊能够焊接大厚壁结构，尤其是回转式空预器转子这种体积较大的结构，与采用单层焊相比，多层焊还可以减小热输入量，减小变形，降低产生缺陷的概率，所以手工电弧焊时采用多层多道焊。
5、层间温度过高会引起热影响区晶粒粗大，使焊缝强度及低温冲击韧性下降，所以焊接时的层间温度不大于400℃，能够提高焊缝强度和低温冲击热性。
6、焊接使用牌号为J507的焊条，其型号为E5015，这种碱性焊条具有优秀的塑性、韧性和抗裂性。
7、所述多组转子的焊接前，需要依次进行焊前准备、焊件组队、编号和尺寸检查的工作，所述多组转子的焊接后，还需依次进行外观检查、验收、技术记录和资料整理。上述步骤能够准确记录回转式空预器转子的隔仓隔板的焊接安装过程，便于后期的维护检查，规范焊接安装流程，提高工作效率。
 附图说明
图1是所有隔板与中心筒焊接的位置顺序示意图；
图2是单个隔板与中心筒焊接的位置顺序示意图。
 本发明的实施方式
为了更好地理解本发明，下面通过实施例对本发明进行进一步的阐述。
实施例：
一种回转式空预器的转子隔板的焊接安装工艺，包括中心筒和六组隔板，每组隔板包括四个隔板，每组隔板相邻两个隔板之间的夹角为90°，如图1所示，六组隔板的焊接包括如下步骤：
（1）焊前准备：清除坡口面及坡口两侧20mm范围内铁锈、水分和污物，并应充分干燥，准备引弧板和熄弧板。坡口是指中心筒与隔板在待焊部位加工的沟槽，坡口面是指中心筒与隔板的坡口表面，对坡口面进行清理，能够减少焊接缺陷的产生，提高焊接效果；准备引弧板和熄弧板，能够避免在中心筒或者隔板或者焊道上进行引弧和熄弧，从而避免对中心筒或者隔板造成损伤、或者降低焊接质量。
（2）编号：按照图1所示，在中心筒的筒壁外进行编号。在焊接前进行编号能够提高焊接位置的准确度。
（3）尺寸检查：焊接使用牌号为J507的焊条，其型号为E5015。打底焊的焊条直径为3.2mm，填充焊和盖面焊的焊条直径均为3.2mm，检查焊条的尺寸是否正确。提高焊接效率和焊接准确度。焊接使用牌号为J507的焊条，其型号为E5015，这种焊条具有优秀的塑性、韧性和抗裂性。因为打底焊的焊条直径为3.2mm，填充焊和盖面焊的焊条直径均为3.2mm，焊道的单层增厚不大于所用焊条直径；单焊道宽度不大于所用焊条直径的3倍，所以能够使隔板焊接地更加牢固。
（4）先将第一组隔板中两个对称处于中心筒两侧的隔板1a-1a’与中心筒的筒壁焊接，再将第一组隔板中的另外两个对称处于中心筒两侧的隔板1b-1b’与中心筒的筒壁焊接；第一组隔板焊接完后，中心筒被分为四等份。因为在第一最隔板中先焊接对称处于中心筒两侧的两隔板1a-1a’，再焊接另外两个对称处于中心筒两侧的两隔板1b-1b’，且每组隔板中相邻两个隔板的夹角是90°，能够抵消先焊接的对称处于中心筒两侧的两隔板1a-1a’的焊接变形。
（5）第二组隔板中的每一个隔板均处于第一组隔板中相邻两个隔板的中间位置，先将第二组隔板中两个对称处于中心筒两侧的隔板2c-2c’与中心筒的筒壁焊接，再将第二组隔板中的另外两个对称处于中心筒两侧的隔板2d-2d’与中心筒的筒壁焊接；第二组隔板焊接完后，中心筒被分为八等份。因为第二组隔板中的每个隔板均处于第一组隔板中相邻两个隔板的中间位置，所以对称处于中心筒两侧的两隔板的连线将中心筒分成八等份，保持整体对称焊接，具体的，在第二组隔板中先焊接对称处于中心筒两侧的两隔板2c-2c’，再焊接另外两个对称处于中心筒两侧的两隔板2d-2d’，且每组隔板中相邻两个隔板的夹角是90°，能够抵消先焊接的对称处于中心筒两侧的两隔板2c-2c’的焊接变形。
（6）处于顺时针相邻的第二组隔板和第一组隔板之间的两组隔板顺时针沿着中心筒的圆周方向均匀分布，且这两组隔板顺时针沿着中心筒的圆周方向与中心筒的筒壁焊接，这两组隔板中的每组隔板按照第一组隔板的焊接顺序焊接；具体的，依次按照3e-3e’、3f-3f’、4g-4g’、4h-4h’的顺序与中心筒的筒壁焊接；对称处于中心筒两侧的两隔板3f-3f’抵消对称处于中心筒两侧的两隔板3e-3e’ 的焊接变形，对称处于中心筒两侧的两隔板4h-4h’抵消对称处于中心筒两侧的两隔板4g-4g’的焊接变形。
（7）处于顺时针相邻的第一组隔板和第二组隔板之间的两组隔板逆时针沿着中心筒的圆周方向均匀分布，且这两组隔板逆时针沿着中心筒的圆周方向与中心筒的筒壁焊接，这两组隔板中的每组隔板按照第一组隔板的焊接顺序焊接。具体的，依次按照5i-5i’、5j-5j’、6k-6k’、6l-6l’的顺序与中心筒的筒壁焊接。对称处于中心筒两侧的两隔板5j-5j’抵消对称处于中心筒两侧的两隔板5i-5i’ 的焊接变形，对称处于中心筒两侧的两隔板6l-6l’抵消对称处于中心筒两侧的两隔板6k-6k’的焊接变形；因为，两隔板5i-5i’和两隔板3e-3e’以两隔板2c-2c’对称，两隔板5j-5j’和两隔板3f-3f’以两隔板2d-2d’对称，所以5i-5i’和5j-5j’这一组隔板抵消3e-3e’和3f-3f’ 这一组隔板的焊接变形；因为，两隔板6k-6k’和两隔板4g-4g’以两隔板2c-2c’对称，两隔板6l-6l’和两隔板4h-4h’以两隔板2d-2d’对称，6k-6k’和6l-6l’这一组隔板抵消4g-4g’和4h-4h’这一组隔板的焊接变形。全部隔板焊接完后，中心筒被分为24等份。
（8）外观检查：检查焊缝质量，如果检查合格，则进行下一步，如果检查不合格，则对步骤（4）-（7）的焊接进行修复；
（9）验收：确认焊接质量；
（10）技术记录：记录焊接数据；
（11）资料整理：将步骤（10）的技术记录进行整理。
进一步的，如图2所示，每个隔板在焊接时，包括如下步骤：
（1）将处于隔板中间位置1的一部分与中心筒的筒壁焊接；
（2）将对称处于隔板中间位置1两侧的两部分与中心筒的筒壁间隔焊接，沿着远离隔板中间位置1的方向依次类推；具体的：按照2-2’，3-3’的顺序与中心筒的筒壁焊接；
（3）沿着远离隔板中间位置1的方向，将对称处于隔板中间位置1两侧的两间隔部分与中心筒的筒壁焊接，依次类推，将隔板与中心筒的筒壁焊接.具体的：按照4-4’，5-5’的顺序与中心筒的筒壁焊接；
进一步的，焊接采用手工电弧焊。
进一步的，焊接采取多层多道焊。
进一步的，焊接采用牌号为J507的焊条，打底焊的焊条直径为3.2mm，填充焊和盖面焊的焊条直径均为3.2mm，焊道的单层增厚不大于所用焊条直径；单焊道宽度不大于所用焊条直径的3倍。
进一步的，焊接时的层间温度不大于400℃。
进一步的，所述多组转子的焊接前，需要依次进行焊前准备、编号和尺寸检查的工作；所述多组转子的焊接后，还需依次进行外观检查、验收、技术记录和资料整理。
进一步的，定位焊及工卡具的焊接，应由合格焊工担任，其焊接工艺应与正式焊接相同；焊接过程中，每层焊道的接头应错开10-15mm；每焊完一层都要清理干净焊缝表面的焊渣和飞溅等，检查合格后，方可进行次层焊接；定位焊的工艺、材料与正式焊接要求相一致，定位块应均匀地布置在整条焊缝上，且不少于三块。

Claims (7)

  1. 一种回转式空预器的转子隔板的焊接安装工艺，其特征在于，包括中心筒和多组隔板，每组隔板包括四个隔板，每组隔板中相邻两个隔板之间的夹角为90°，多组隔板的焊接包括如下步骤：
    （1）先将第一组隔板中两个对称处于中心筒两侧的隔板与中心筒的筒壁焊接，再将第一组隔板中的另外两个对称处于中心筒两侧的隔板与中心筒的筒壁焊接；
    （2）第二组隔板中的每一个隔板均处于第一组隔板中相邻两个隔板的中间位置，第二组隔板按照第一组隔板的焊接顺序焊接；
    （3）处于顺时针相邻的第二组隔板和第一组隔板之间的N组隔板顺时针沿着中心筒的圆周方向均匀分布，N为偶数，且这N组隔板顺时针沿着中心筒的圆周方向与中心筒的筒壁焊接，这N组隔板中的每组隔板按照第一组隔板的焊接顺序焊接；
    （4）处于顺时针相邻的第一组隔板和第二组隔板之间的N组隔板逆时针沿着中心筒的圆周方向均匀分布，且这N组隔板逆时针沿着中心筒的圆周方向与中心筒的筒壁焊接，这N组隔板中的每组隔板按照第一组隔板的焊接顺序焊接。
  2. 根据权利要求1所述的一种回转式空预器的转子隔板的焊接安装工艺，其特征在于，所述每个隔板的焊接包括如下步骤：
    （1）将处于隔板中间位置的一部分与中心筒的筒壁焊接；
    （2）将对称处于隔板中间位置两侧的两部分与中心筒的筒壁间隔焊接，沿着远离隔板中间位置的方向依次类推；
    （3）沿着远离隔板中间位置的方向，将对称处于隔板中间位置两侧的两间隔部分与中心筒的筒壁焊接，依次类推，将隔板与中心筒的筒壁焊接。
  3. 根据权利要求2所述的一种回转式空预器的转子隔板的焊接安装工艺，其特征在于，所述焊接采用手工电弧焊。
  4. 根据权利要求3所述的一种回转式空预器的转子隔板的焊接安装工艺，其特征在于，所述焊接采取多层多道焊。
  5. 根据权利要求4所述的一种回转式空预器的转子隔板的焊接安装工艺，其特征在于，所述焊接时的层间温度不大于400℃。
  6. 根据权利要求3所述的一种回转式空预器的转子隔板的焊接安装工艺，其特征在于，所述焊接采用牌号为J507的焊条。
  7. 根据权利要求1所述的一种回转式空预器的转子隔板的焊接安装工艺，其特征在于，在所述多组隔板的焊接前，需要依次进行如下步骤：焊前准备、编号和尺寸检查；
    在所述多组隔板的焊接后，还需依次进行如下步骤：外观检查、验收、技术记录和资料整理。
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891030A (en) * 1971-06-18 1975-06-24 Rothemuehle Brandt Kritzler Cylindrical heating-surface support structure for regenerative air preheaters
JP5996597B2 (ja) * 2014-10-01 2016-09-21 中国電力株式会社 回転再生式空気予熱器
CN107726357A (zh) * 2017-11-03 2018-02-23 东方电气集团东方锅炉股份有限公司 半模数仓格及组装工艺以及回转式空预器的现场焊接安装工艺
CN108098332A (zh) * 2018-01-05 2018-06-01 北京国电龙源环保工程有限公司 大型锅炉空气预热器转子的安装与焊接方法
CN109079283A (zh) * 2018-10-31 2018-12-25 中国电建集团山东电力建设第工程有限公司 一种回转式空预器的转子隔板的焊接安装工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6505679B2 (en) * 2001-02-21 2003-01-14 Alstom Power N.V. Low-distortion sector plate for air preheaters
CN203036672U (zh) * 2012-12-31 2013-07-03 北京斯迪曼科技有限公司 一种回转式空预器中换热隔仓的密封机构
CN104588958B (zh) * 2014-12-03 2016-08-24 东方电气集团东方锅炉股份有限公司 控制大直径薄壁筒体上接管焊接变形的方法
CN106270974B (zh) * 2016-08-30 2018-08-10 苏州海陆重工股份有限公司 高温气冷堆核电站中金属堆内构件下堆芯壳底座焊接方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891030A (en) * 1971-06-18 1975-06-24 Rothemuehle Brandt Kritzler Cylindrical heating-surface support structure for regenerative air preheaters
JP5996597B2 (ja) * 2014-10-01 2016-09-21 中国電力株式会社 回転再生式空気予熱器
CN107726357A (zh) * 2017-11-03 2018-02-23 东方电气集团东方锅炉股份有限公司 半模数仓格及组装工艺以及回转式空预器的现场焊接安装工艺
CN108098332A (zh) * 2018-01-05 2018-06-01 北京国电龙源环保工程有限公司 大型锅炉空气预热器转子的安装与焊接方法
CN109079283A (zh) * 2018-10-31 2018-12-25 中国电建集团山东电力建设第工程有限公司 一种回转式空预器的转子隔板的焊接安装工艺

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