WO2022041505A1 - 一种直缝焊管焊接用保护气体装置、焊接装置及焊接方法 - Google Patents

一种直缝焊管焊接用保护气体装置、焊接装置及焊接方法 Download PDF

Info

Publication number
WO2022041505A1
WO2022041505A1 PCT/CN2020/129330 CN2020129330W WO2022041505A1 WO 2022041505 A1 WO2022041505 A1 WO 2022041505A1 CN 2020129330 W CN2020129330 W CN 2020129330W WO 2022041505 A1 WO2022041505 A1 WO 2022041505A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
air outlet
welded pipe
straight seam
seam welded
Prior art date
Application number
PCT/CN2020/129330
Other languages
English (en)
French (fr)
Inventor
张望成
孙清洁
唐爽
李军兆
鲁蓉蓉
Original Assignee
湖南湘投金天新材料有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 湖南湘投金天新材料有限公司 filed Critical 湖南湘投金天新材料有限公司
Priority to DE212020000716.0U priority Critical patent/DE212020000716U1/de
Publication of WO2022041505A1 publication Critical patent/WO2022041505A1/zh

Links

Images

Classifications

    • 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
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • 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
    • B23K9/32—Accessories
    • B23K9/325—Devices for supplying or evacuating shielding gas
    • 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
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • 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
    • B23K9/32—Accessories
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • 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
    • B23K9/025—Seam welding; Backing means; Inserts for rectilinear seams
    • B23K9/0253—Seam welding; Backing means; Inserts for rectilinear seams for the longitudinal seam of tubes

Definitions

  • the invention relates to the technical field of welding, in particular to a shielding gas device, a welding device and a welding method for welding a straight seam welded pipe.
  • the invention provides a shielding gas device for welding a straight seam welded pipe.
  • the gas pressure blown into the straight seam welded pipe is used to offset the gravity when the metal is melted, so as to realize the internal welding of the straight seam welded pipe during the welding process.
  • the excess height of the seam can be effectively controlled, and the excess height of the inner weld can be controlled within 0.3mm, and cracking will not occur due to stress concentration during the expansion process; It can save 25-30% of purchasing cost when purchasing raw materials.
  • the specific plans are as follows:
  • a protective gas device for welding a straight seam welded pipe comprising a protective gas rod, the protective gas rod is communicated with a protective gas source, and the protective gas source is used to provide protective gas to the protective gas rod;
  • the protective gas rod is provided with an air outlet group, and the protective gas passing through the air outlet group can form a uniform airflow for backflushing the weld pool metal of the straight seam welded pipe.
  • the air outlet hole group includes a central hole group, a first array hole group and a second array hole group arranged from the inside to the outside, the first array hole group and the second array hole group are respectively
  • the center of the center hole group is the center of the circle, and the circle pattern is set. It is set in a circular array, so that the air flow generated by the entire air outlet group forms a three-dimensional air flow to completely cover the weld seam, which can more effectively control the inner weld seam height and improve the quality of the product.
  • the central hole group includes one first air outlet, the first array hole group includes six second air outlets, and the second array hole group includes six third air outlets;
  • the diameters of the first air outlet, the second air outlet and the third air outlet are 1.0-1.5 mm.
  • the central hole group, the first array hole group and the second array hole group are preferably the combination of 1, 6, and 6.
  • the air outlets are arranged in the most closely arranged way, and the aperture and spacing of each air outlet are reasonably selected. It can ensure the effective control of the residual height of the inner weld and is easy to manufacture.
  • other numbers and other arrangement rules can also be used for arrangement according to this design idea.
  • the first air outlet hole, the second air outlet hole and the third air outlet hole are one kind of through holes in a regular shape and an irregular shape, such as (select a cylindrical hole, a cone hole, etc.).
  • the shape and structure of each air outlet can be selected according to the actual processing.
  • Regularly shaped through holes can be used, or irregular shaped through holes can be used.
  • the uniform airflow that can form a suitable coverage area shall prevail to meet different needs.
  • the supporting mechanism for supporting the protective gas rod
  • the supporting mechanism includes at least one set of supporting single pieces
  • the supporting single piece includes a supporting sheet
  • the supporting sheet is provided with mounting holes
  • the protective gas rod provided through the mounting hole.
  • the design of the support mechanism can support the shielding gas rod well, ensure the proper position of the air outlet group and the welding torch, and facilitate subsequent welding operations.
  • the supporting unit further includes a clip, and the clip is in contact with or connected to the supporting sheet for improving the supporting strength of the supporting unit.
  • the support sheet is made of fire-resistant and flame-retardant cloth;
  • the clip is made of pvc (polyvinyl chloride) material;
  • the diameter of the protective gas rod is 15-20mm smaller than the inner diameter of the straight seam welded pipe.
  • the material selection of the support piece and the clip can meet the dual functions of support and protection; the specifications of the protective gas rod and the straight seam welded pipe are adapted to avoid the distance between the air outlet and the inner wall of the straight seam welded pipe being too far to affect the size of the blowback force.
  • the support mechanism includes two groups of support elements along the axial direction of the shielding gas rod; the air outlet group is located between the two groups of support elements; along the movement direction of the straight seam welded pipe, the support element located in the front
  • a through hole for gas to pass through is provided on the support piece and/or the clip of the piece.
  • the front support piece is provided with through holes, so that the shielding gas can fully flow to the subsequent process to protect the straight seam welded pipe from being oxidized; while the support piece and clip on the opposite side of the pipe movement are not provided with through holes, the purpose is to make full use of Protective gas, so that it is not consumed and lost at the end that does not need protection.
  • the number and position of the through holes (for airflow passing through) on the support piece and on the clip can be selected according to actual needs.
  • the second object of the present invention is to provide a welding device for a straight seam welded pipe, including a welding assembly and the above-mentioned shielding gas device for welding a straight seam welded pipe;
  • the welding assembly includes a welding torch, and the shielding gas rod is located in the inner cavity of the straight seam welded pipe and is located below the welding torch;
  • the air outlet group is located 1.0-5.0mmmm in front of the welding torch.
  • the welding device for a straight seam welded pipe of the present invention adopts the above-mentioned specific structure of the shielding gas device for the straight seam welded pipe welding and the welding assembly to be used together, which can effectively weld the straight seam welded pipe, and the inner weld of the welded straight seam welded pipe remains. High is effectively controlled.
  • the third object of the present invention is to provide a welding method for a straight seam welded pipe, comprising the following steps:
  • Step 1 Install the supporting mechanism on the protective gas rod; put the protective gas rod with the supporting mechanism installed into the straight seam welded pipe;
  • Step 2 Adjust the relative position of the shielding gas rod and the straight seam welded pipe, so that the air outlet group on the shielding gas rod is set corresponding to the welding torch;
  • Step 3 Turn on the protective gas source, adjust the gas pressure of the protective gas through the valve set between the protective gas rod and the protective gas source; start the welding torch for welding, and obtain the welded straight seam welded pipe.
  • the welding method of the present invention is easy to operate and suitable for industrial production.
  • FIG. 1 is a schematic structural diagram of a welding device during welding in an embodiment of the present invention
  • Fig. 2 is a partial enlarged view of the protective gas rod in Fig. 1;
  • Fig. 3 is the sectional view of Fig. 2;
  • Fig. 4 is the structural representation of supporting single piece in Fig. 1;
  • FIG. 5 is a schematic diagram of another arrangement of air outlet groups
  • a welding device provided by the present invention includes a shielding gas device for welding straight seam welded pipes and welded components, specifically:
  • the welding assembly includes a welding gun, and the specific structure of the welding assembly may refer to the prior art.
  • the shielding gas device for welding straight seam welded pipes includes a shielding gas rod 3 and a supporting mechanism 5, and the detailed structure is as follows:
  • the protective gas rod 3 is communicated with the gas pipe 7 through the connecting rod 6, and the gas pipe 7 is communicated with the protective gas source.
  • the gas pipe 7 here is preferably a hose, and the gas pipe 7 is also provided with a digital display pressure regulating valve for adjusting the air pressure.
  • the adjustment accuracy is 0.001MPa.
  • the protective gas rod 3 is provided with an air outlet group 4, and the protective gas passing through the air outlet group 4 can form a uniform airflow for backflushing the weld seam of the weld pool metal of the straight seam welded pipe, that is, during the welding process.
  • the air outlet hole group 4 includes a central hole group 4.1, a first array hole group 4.2 and a second array hole group 4.3 arranged from the inside to the outside, the first array hole group and the second array hole group are respectively in the center
  • the center of the hole group is the center of the circle for circular pattern setting. Further preferably, as shown in FIG.
  • the central hole group includes one first air outlet, the first array hole group includes six second air outlets, and the second array hole group includes six third air outlets ;
  • the first air outlet, the second air outlet and the third air outlet are regular shapes, and the apertures of the first air outlet, the second air outlet and the third air outlet are 1.0-1.5mm (preferably 1.50mm) ;
  • the spacing between the first air outlet and the second air outlet, between the adjacent second air outlets, between the second air outlet and the third air outlet, and between the adjacent two third air outlets are all 0.5- 2.0mm (preferably 1mm). Irregularly shaped through holes can also be used, which can be selected according to actual needs.
  • the first air outlet here is a cylindrical through hole, and its central axis is L1; the second air outlet is a trapezoidal table through hole, and the vertical line of its upper end surface is L2; the third air outlet is a cylinder Through hole, its central axis is L3.
  • L1 and L2 are arranged in the vertical direction, and L3 and the horizontal direction form an included angle of 70°-80°, preferably 75°.
  • the arrangement of the air outlet group makes the air flow out from the shielding gas rod in an inverted cone, which can well cover the welding seam and ensure that the gas pressure blown into the straight seam welded pipe is used to offset the melting of the metal during the welding process.
  • the gravity of the straight seam welded pipe can be effectively controlled during the welding process of the inner weld seam.
  • it can also be arranged in a rectangular array, and the long side is the axial direction of the straight seam welded pipe, as shown in Figure 5.
  • the support mechanism 5 is arranged on the protective gas rod 3.
  • the support mechanism 5 includes a support single piece A and a support single piece B.
  • the support single piece A and the support single piece B both include a support piece 5.1, and the support piece 5.1 is on the support piece 5.1.
  • the supporting single piece A and the supporting single piece B are provided with clips 5.2, preferably the clips are annular structures, the protective gas rod is arranged through the clips, and the two sides of the support piece are provided with clips 5.2 ,
  • the support material is made of fire-resistant and flame-retardant cloth, and the clip is made of pvc material.
  • the purpose of the support piece is to prevent the protective gas rod from scratching the inner wall of the straight seam welded pipe.
  • the clip provides a certain strength for the support piece.
  • through holes 5.3 for gas to pass through are provided on the support piece and the clip of the front support piece (that is, the support piece A), the purpose of which is that the shielding gas can fully flow to the subsequent process, Protect the straight seam welded pipe from oxidation during the subsequent heat treatment process.
  • the welding operation using the welding device of the present invention specifically includes the following steps:
  • Step 1 Install the support mechanism on the protective gas rod (after installation, the supporting single piece A and the supporting single piece B are relatively fixed to the position of the protective gas rod, that is, the supporting single piece A and the supporting single piece B will not be in the protective gas. move on the rod); put the shielding gas rod with the support mechanism installed into the straight seam welded pipe;
  • Step 2 Adjust the relative position of the shielding gas rod and the straight seam welded pipe, so that the air outlet group on the shielding gas rod is set corresponding to the welding torch;
  • Step 3 Turn on the protective gas source, adjust the air pressure of the protective gas through the valve (ie, digital display pressure regulating valve) set between the protective gas rod and the protective gas source; start the welding torch for welding, and obtain the welded straight seam welded pipe.
  • the valve ie, digital display pressure regulating valve
  • the residual height of the inner weld can be controlled within 0.3mm, and the probability of cracking due to stress concentration during the expansion process is greatly reduced; the thinning amount of the straight seam welded pipe is controlled within 0.02-0.03mm , which can save 25-30% of the procurement cost when purchasing raw materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Arc Welding In General (AREA)

Abstract

一种用于直缝焊管焊接用保护气体装置，包括保护气杆(3)，保护气杆上设有出气孔组(4)，经出气孔组的保护气体能形成均匀气流用于对直缝焊管的焊缝熔池金属进行反吹。该保护气体装置在焊接过程中利用吹入直缝焊管的气体压力来抵消金属融化时的重力，实现在对内焊缝余高的有效控制。还涉及一种直缝焊管焊接用装置，采用保护气体装置和焊接组件的组合实现焊接。还涉及一种焊接方法，通过观察和测量焊缝形貌及尺寸，精准控制反吹气体的压力，继而实现对直缝焊管内焊缝余高的控制，有效保证焊缝的形貌。

Description

一种直缝焊管焊接用保护气体装置、焊接装置及焊接方法 技术领域
本发明涉及焊接技术领域，尤其涉及一种用于直缝焊管焊接用保护气体装置、焊接装置及焊接方法。
背景技术
目前现有技术中，直缝焊管以采用钨极氩弧焊焊接的方式进行生产的居多，而在采用钨极氩弧焊焊接方式生产直缝焊管时由于焊接热量的输入和重力的作用，熔化金属会在管内形成内焊缝余高，因为不填充金属，内焊缝余高金属主要来自于其它位置的壁厚减薄，内焊缝余高的出现在原本均匀壁厚的基础上会导致两个主要问题：一是内焊缝余高位置壁厚增加，在胀管过程中容易出现应力集中而出现开裂；二是为满足管材的最小壁厚要求，必须增加材料原本的壁厚来弥补壁厚的减薄，增加生产成本。
发明内容
本发明提供一种用于直缝焊管焊接用保护气体装置，在焊接过程中利用吹入直缝焊管的气体压力来抵消金属融化时的重力，从而实现在直缝焊管在焊接过程中对内焊缝余高进行有效控制，能将内焊缝余高控制到0.3mm以内，在胀管过程中不会因出现应力集中而发生开裂；直缝焊管的减薄量控制在0.02-0.03mm，在采购原材料时能节约25-30％的采购成本。具体方案如下：
一种直缝焊管焊接用保护气体装置，包括保护气杆，所述保护气杆与保护气源连通，保护气源用于给保护气杆提供保护气体；
所述保护气杆上设有出气孔组，经过所述出气孔组的保护气体能形成均匀气流用于对直缝焊管的焊缝熔池金属进行反吹。
以上技术方案中优选的，所述出气孔组包括由内至外布置的中心孔组、第一阵列孔组和第二阵列孔组，所述第一阵列孔组和第二阵列孔组分别以中心孔组的中心为圆心进行圆周阵列设置。采用圆周阵列方式设置，使得整个出气孔组产生的气流形成立体气流完全覆盖焊缝，能更加有效地控制内焊缝余高，提高产品的品质。
以上技术方案中优选的，所述中心孔组包括一个第一出气孔，所述第一阵列孔组包括六个第二出气孔，所述第二阵列孔组包括六个第三出气孔；所述第一出气孔、第二出气孔以及第三出气孔的孔径为1.0-1.5mm。中心孔组、第一阵列孔组和第二阵列孔组优选1、6、6的组合方式，各出气孔以最紧密排布的方式进行排列，且各出气孔的孔径及间距选择合理，既能 保证有效控制内焊缝余高，又便于制作。除此之外，还可以根据此种设计思路采用别的数量和别的排列规则进行排列。
以上技术方案中优选的，所述第一出气孔、第二出气孔以及第三出气孔为规则形状及不规则形状中的一种通孔，如(选圆柱体孔、圆锥体孔等)。各出气孔的形状构造可根据实际加工选择，可采用规则形状的通孔，也可以采用不规格形状的通孔，以能形成合适覆盖面积的均匀气流为准，满足不同的需求。
以上技术方案中优选的，还包括用于对保护气杆进行支撑的支撑机构，支撑机构包括至少一组支撑单件，所述支撑单件包括支撑片，支撑片上设有安装孔，保护气杆贯穿所述安装孔设置。支撑机构的设计，能够对保护气杆进行很好地支撑，确保出气孔组与焊枪的位置适当，利于后续焊接操作。
以上技术方案中优选的，所述支撑单件还包括夹片，所述夹片与支撑片相接触或相连用于提高支撑单件的支撑强度。
以上技术方案中优选的，支撑片由耐火阻燃布制成；夹片由pvc(聚氯乙烯)材料制成；所述保护气杆的直径比直缝焊管的内径小15-20mm。支撑片和夹片的材质选择能满足支撑和保护的双重功能；保护气杆和直缝焊管的规格适配，避免出气孔与直缝焊管内壁距离太远而影响反吹力的大小。
以上技术方案中优选的，所述支撑机构包括沿保护气杆轴向方向的两组支撑单件；出气孔组位于两组支撑单件之间；沿直缝焊管运动方向，位于前方的支撑单件的支撑片和/或夹片上设有用于气体通过的通孔。前方的支撑单件上设有通孔，使得保护气体能充分流向后面工序，保护直缝焊管不被氧化；而管材运动反方向侧的支撑片和夹片未设置通孔，目的是为充分利用保护气体，不让其在不需要保护的一端消耗流失。支撑片上和夹片上的通孔(用于气流穿过)的数量和位置设置，均可根据实际需求选择。
本发明的第二目的在于提供一种直缝焊管用焊接装置，包含焊接组件以及如上述的直缝焊管焊接用保护气体装置；
焊接组件包括焊枪，所述保护气杆位于直缝焊管内腔中且位于焊枪的下方；
沿直缝焊管运动方向，所述出气孔组位于所述焊枪正下方的前方1.0-5.0mmmm。
本发明的直缝焊管用焊接装置采用上述特定结构的直缝焊管焊接用保护气体装置和焊接组件的配合使用，能有效对直缝焊管进行焊接，且焊接后的直缝焊管的内焊缝余高得到有效控制。
本发明第三目的在于提供一种直缝焊管的焊接方法，包括以下步骤：
步骤一：将支撑机构安装在保护气杆上；将安装好支撑机构的保护气杆放入直缝焊管内；
步骤二：调整保护气杆和直缝焊管的相对位置，使得保护气杆上的出气孔组与焊枪相对应设置；
步骤三：打开保护气源，通过设置在保护气杆和保护气源之间的阀门调节保护气体的气压大小；启动焊枪进行焊接，得到焊接后的直缝焊管。
应用本发明的焊接方法，操作方便，适于工业化生产。
除了上面所描述的目的、特征和优点之外，本发明还有其它的目的、特征和优点。下面将参照图，对本发明作进一步详细的说明。
附图说明
构成本申请的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是本发明实施例中焊接装置焊接时的结构示意图；
图2是图1中保护气杆的局部放大图；
图3是图2的剖视图；
图4是图1中支撑单件的结构示意图；
图5为另外一种出气孔组排布方式示意图；
其中：1、直缝焊管，2、焊枪，3、保护气杆，4、出气孔组，4.1、中心孔组，4.2、第一阵列孔组，4.3、第二阵列孔组，5、支撑机构，5.1、支撑片，5.2、夹片，5.3、通孔，6、连接杆，7、气管。
具体实施方式
以下结合附图对本发明的实施例进行详细说明，但是本发明可以根据权利要求限定和覆盖的多种不同方式实施。
实施例：
参见图1至图4所示(图1中实线箭头为保护气体的流向；虚线箭头为直缝焊管的运动方向)，本发明提供的一种焊接装置，包括直缝焊管焊接用保护气体装置和焊接组件，具体是：
焊接组件包括焊枪，焊接组件的具体结构可参照现有技术。
直缝焊管焊接用保护气体装置包括保护气杆3以及支撑机构5，详细结构如下：
保护气杆3通过连接杆6和气管7连通，气管7与保护气源连通，此处的气管7优选软管，且气管7上还设有用于调节气压大小的数显调压阀，其最小调节精度为0.001MPa。保护 气杆3上设有出气孔组4，经过所述出气孔组4的保护气体能形成均匀气流用于对直缝焊管的焊缝熔池金属的焊缝进行反吹，即在焊接过程中利用吹入直缝焊管的气体压力来抵消金属融化时的重力，从而实现在直缝焊管在焊接过程中对内焊缝余高进行有效控制。此处优选：出气孔组4包括由内至外布置的中心孔组4.1、第一阵列孔组4.2和第二阵列孔组4.3，所述第一阵列孔组和第二阵列孔组分别以中心孔组的中心为圆心进行圆周阵列设置。进一步优选的，详见图2，所述中心孔组包括一个第一出气孔，所述第一阵列孔组包括六个第二出气孔，所述第二阵列孔组包括六个第三出气孔；所述第一出气孔、第二出气孔以及第三出气孔为规则形状，且所述第一出气孔、第二出气孔以及第三出气孔的孔径为1.0-1.5mm(优选1.50mm)；第一出气孔和第二出气孔之间、相邻第二出气孔之间、第二出气孔和第三出气孔之间以及相邻两个第三出气孔之间的间距均为0.5-2.0mm(优选1mm)。还可以采用不规则形状的通孔，可根据实际需求选择。详见图3，此处的第一出气孔为圆柱体通孔，其中心轴线为L1；第二出气孔为梯形台通孔，其上端面的垂线为L2；第三出气孔为圆柱体通孔，其中心轴线为L3。以直缝焊管沿水平方向运动为基准，此处L1和L2均沿竖直方向设置，L3与水平方向呈70°-80°夹角，优选75°夹角。出气孔组的排布方式使得气流呈倒锥体从保护气杆内流出，能很好地对焊缝处进行覆盖，确保在焊接过程中利用吹入直缝焊管的气体压力来抵消金属融化时的重力，从而实现在直缝焊管在焊接过程中对内焊缝余高进行有效控制。除此之外，还可以采用矩形阵列排布，长边为直缝焊管的轴向，如图5所示。
支撑机构5设置在保护气杆3上，图1中示意支撑机构5包括支撑单件A和支撑单件B，所述支撑单件A和支撑单件B均包括支撑片5.1，支撑片5.1上设有用于保护气杆3贯穿设置的安装孔，此处优选支撑单件A和支撑单件B分别位于保护气杆的两端，且出气孔组4位于支撑单件A和支撑单件B之间的保护气杆上。
除此之外，支撑单件A和支撑单件B上均设有夹片5.2，优选夹片为环状结构，保护气杆贯穿夹片设置，且支撑片的两侧均设有夹片5.2，支撑材料由耐火阻燃布制成，夹片由pvc材料制成，支撑片的目的是防止保护气杆划伤直缝焊管内壁，夹片是为支撑片提供一定强度。
优选的，沿直缝焊管运动方向，位于前方的支撑单件(即支撑单件A)的支撑片和夹片上设有用于气体通过的通孔5.3，其目的在于保护气体能充分流向后面工序，保护直缝焊管在后续的热处理工序过程中不被氧化。
应用本发明的焊接装置进行焊接操作，具体包括如下步骤：
步骤一：将支撑机构安装在保护气杆上(安装后，支撑单件A和支撑单件B分别与保护气杆的位置相对固定，即支撑单件A和支撑单件B不会在保护气杆上发生移动)；将安装好支撑机构的保护气杆放入直缝焊管内；
步骤二：调整保护气杆和直缝焊管的相对位置，使得保护气杆上的出气孔组与焊枪相对应设置；
步骤三：打开保护气源，通过设置在保护气杆和保护气源之间的阀门(即数显调压阀)调节保护气体的气压大小；启动焊枪进行焊接，得到焊接后的直缝焊管。
在调节阀门时，通过观察和测量焊缝形貌及尺寸，调节数显调压阀的大小，控制气体反吹至焊缝的压力，以有效保证其反吹气体的压力与焊缝熔池融化金属的重力接近。
应用本发明的方案，能将内焊缝余高控制到0.3mm以内，在胀管过程中因出现应力集中而发生开裂的概率得到大大降低；直缝焊管的减薄量控制在0.02-0.03mm，在采购原材料时能节约25-30％的采购成本。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种直缝焊管焊接用保护气体装置，其特征在于：包括保护气杆(3)，所述保护气杆(3)与保护气源连通，保护气源用于给保护气杆提供保护气体；
    所述保护气杆(3)上设有出气孔组(4)，经过所述出气孔组(4)的保护气体能形成均匀气流用于对直缝焊管的焊缝熔池金属进行反吹实现对内焊缝余高的控制。
  2. 根据权利要求1所述的直缝焊管焊接用保护气体装置，所述出气孔组(4)包括由内至外布置的中心孔组(4.1)、第一阵列孔组(4.2)和第二阵列孔组(4.3)，所述第一阵列孔组和第二阵列孔组分别以中心孔组的中心为圆心进行圆周阵列设置。
  3. 根据权利要求2所述的直缝焊管焊接用保护气体装置，其特征在于：所述中心孔组包括一个第一出气孔，所述第一阵列孔组包括六个第二出气孔，所述第二阵列孔组包括六个第三出气孔；第一出气孔和第二出气孔之间、相邻第二出气孔之间、第二出气孔和第三出气孔之间以及相邻两个第三出气孔之间的间距均为0.5-2.0mm。
  4. 根据权利要求3所述的直缝焊管焊接用保护气体装置，其特征在于：所述第一出气孔、第二出气孔以及第三出气孔为规则形状的通孔以及不规则形状的通孔中的至少一种；所述第一出气孔、第二出气孔以及第三出气孔的孔径为1.0-1.5mm。
  5. 根据权利要求1-4任意一项所述的直缝焊管焊接用保护气体装置，其特征在于，还包括用于对保护气杆(3)进行支撑的支撑机构(5)，支撑机构包括至少一组支撑单件，所述支撑单件包括支撑片(5.1)，支撑片上设有安装孔，保护气杆(3)贯穿所述安装孔设置。
  6. 根据权利要求4所述的直缝焊管焊接用保护气体装置，其特征在于，所述支撑单件还包括夹片(5.2)，所述夹片与支撑片相接触或相连用于提高支撑单件的支撑强度。
  7. 根据权利要求6所述的直缝焊管焊接用保护气体装置，其特征在于，支撑片由耐火阻燃布制成；夹片由pvc材料制成；所述保护气杆的直径比直缝焊管的内径小15-20mm。
  8. 根据权利要求6所述的直缝焊管焊接用保护气体装置，其特征在于，所述支撑机构包括沿保护气杆(3)轴向方向的两组支撑单件；出气孔组(4)位于两组支撑单件之间；沿直缝焊管运动方向，位于前方的支撑单件的支撑片和/或夹片上设有用于气体通过的通孔(5.3)。
  9. 一种直缝焊管用焊接装置，其特征在于，包含焊接组件以及如权利要求1-8任意一项所述的直缝焊管焊接用保护气体装置；
    焊接组件包括焊枪，所述保护气杆(3)位于直缝焊管内腔中且位于焊枪的下方；
    沿直缝焊管运动方向，所述出气孔组(4)位于所述焊枪正下方的前方1.0-5.0mm。
  10. 一种直缝焊管的焊接方法，其特征在于，采用如权利要求9所述的焊接装置进行焊接，其包括以下步骤：
    步骤一：将支撑机构安装在保护气杆上；将安装好支撑机构的保护气杆放入直缝焊管内；
    步骤二：调整保护气杆和直缝焊管的相对位置，使得保护气杆上的出气孔组与焊枪相对应设置；
    步骤三：打开保护气源，通过设置在保护气杆和保护气源之间的阀门调节保护气体的气压大小；启动焊枪进行焊接，得到焊接后的直缝焊管。
PCT/CN2020/129330 2020-08-27 2020-11-17 一种直缝焊管焊接用保护气体装置、焊接装置及焊接方法 WO2022041505A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE212020000716.0U DE212020000716U1 (de) 2020-08-27 2020-11-17 Schutzgasvorrichtung für das Schweißen eines längsnahtgeschweißten Rohres und Schweißvorrichtung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010877333.8A CN111872519B (zh) 2020-08-27 2020-08-27 一种用于直缝焊管内焊缝余高的控制装置及其方法
CN202010877333.8 2020-08-27

Publications (1)

Publication Number Publication Date
WO2022041505A1 true WO2022041505A1 (zh) 2022-03-03

Family

ID=73199611

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/129330 WO2022041505A1 (zh) 2020-08-27 2020-11-17 一种直缝焊管焊接用保护气体装置、焊接装置及焊接方法

Country Status (3)

Country Link
CN (1) CN111872519B (zh)
DE (1) DE212020000716U1 (zh)
WO (1) WO2022041505A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114535758A (zh) * 2022-03-29 2022-05-27 广州文冲船舶修造有限公司 一种脱硫塔变形部位挖换焊接的气体保护方法
CN114713949A (zh) * 2022-03-23 2022-07-08 西安菲尔特金属过滤材料股份有限公司 一种用于金属网带自动焊接背面气体保护装置
CN115488473A (zh) * 2022-09-29 2022-12-20 哈电集团（秦皇岛）重型装备有限公司 小口径管管内坡口tig焊用辅助系统及应用其的焊接方法
CN117464262A (zh) * 2023-12-26 2024-01-30 河南省超滤净化设备有限公司 一种过滤滤网焊接设备
CN117506256A (zh) * 2023-12-22 2024-02-06 山东恒辉节能技术集团有限公司 焊接装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111872519B (zh) * 2020-08-27 2024-05-14 湖南湘投金天新材料有限公司 一种用于直缝焊管内焊缝余高的控制装置及其方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05154694A (ja) * 1991-11-29 1993-06-22 Mitsubishi Heavy Ind Ltd 溶接用ガスシールド要具
CN2796928Y (zh) * 2005-06-27 2006-07-19 四川石油管理局 双相不锈钢管道焊接内充氩气保护装置
CN205967773U (zh) * 2016-08-29 2017-02-22 四川空分设备(集团)有限责任公司 不锈钢管路焊接背气保护装置
CN206883001U (zh) * 2017-05-17 2018-01-16 武汉逸飞激光设备有限公司 一种激光焊接机同轴吹保护气的结构
CN109623112A (zh) * 2019-01-02 2019-04-16 武汉船用机械有限责任公司 一种壳体氩弧焊背面气氛保护装置
CN211162349U (zh) * 2019-10-25 2020-08-04 成都飞机工业（集团）有限责任公司 一种导管焊缝背面保护装置
CN211192591U (zh) * 2019-09-06 2020-08-07 湖州宝钛久立钛焊管科技有限公司 一种内焊缝余高保护装置
CN111673331A (zh) * 2020-07-14 2020-09-18 湖南湘投金天新材料有限公司 一种用于焊管焊接的内保护气杆
CN111872519A (zh) * 2020-08-27 2020-11-03 湖南湘投金天新材料有限公司 一种用于直缝焊管内焊缝余高的控制装置及其方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07214309A (ja) * 1994-02-03 1995-08-15 Nippon Steel Corp 鋼管溶接方法
CN104368921B (zh) * 2014-11-19 2017-01-11 长沙成进汽车配件有限公司 用于不锈钢制管机的管内焊缝气体保护装置
CN105021287B (zh) * 2015-07-10 2017-10-27 广东电网有限责任公司电力科学研究院 一种电站锅炉高温壁面红外检测装置的冷却系统
CN209705483U (zh) * 2019-03-08 2019-11-29 江苏巨鑫石油钢管有限公司 疏浚钢管
CN212495896U (zh) * 2020-08-27 2021-02-09 湖南湘投金天新材料有限公司 一种用于直缝焊管内焊缝余高的控制装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05154694A (ja) * 1991-11-29 1993-06-22 Mitsubishi Heavy Ind Ltd 溶接用ガスシールド要具
CN2796928Y (zh) * 2005-06-27 2006-07-19 四川石油管理局 双相不锈钢管道焊接内充氩气保护装置
CN205967773U (zh) * 2016-08-29 2017-02-22 四川空分设备(集团)有限责任公司 不锈钢管路焊接背气保护装置
CN206883001U (zh) * 2017-05-17 2018-01-16 武汉逸飞激光设备有限公司 一种激光焊接机同轴吹保护气的结构
CN109623112A (zh) * 2019-01-02 2019-04-16 武汉船用机械有限责任公司 一种壳体氩弧焊背面气氛保护装置
CN211192591U (zh) * 2019-09-06 2020-08-07 湖州宝钛久立钛焊管科技有限公司 一种内焊缝余高保护装置
CN211162349U (zh) * 2019-10-25 2020-08-04 成都飞机工业（集团）有限责任公司 一种导管焊缝背面保护装置
CN111673331A (zh) * 2020-07-14 2020-09-18 湖南湘投金天新材料有限公司 一种用于焊管焊接的内保护气杆
CN111872519A (zh) * 2020-08-27 2020-11-03 湖南湘投金天新材料有限公司 一种用于直缝焊管内焊缝余高的控制装置及其方法

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114713949A (zh) * 2022-03-23 2022-07-08 西安菲尔特金属过滤材料股份有限公司 一种用于金属网带自动焊接背面气体保护装置
CN114713949B (zh) * 2022-03-23 2024-05-28 西安菲尔特金属过滤材料股份有限公司 一种用于金属网带自动焊接背面气体保护装置
CN114535758A (zh) * 2022-03-29 2022-05-27 广州文冲船舶修造有限公司 一种脱硫塔变形部位挖换焊接的气体保护方法
CN115488473A (zh) * 2022-09-29 2022-12-20 哈电集团（秦皇岛）重型装备有限公司 小口径管管内坡口tig焊用辅助系统及应用其的焊接方法
CN115488473B (zh) * 2022-09-29 2024-04-19 哈电集团（秦皇岛）重型装备有限公司 小口径管管内坡口tig焊用辅助系统及应用其的焊接方法
CN117506256A (zh) * 2023-12-22 2024-02-06 山东恒辉节能技术集团有限公司 焊接装置
CN117464262A (zh) * 2023-12-26 2024-01-30 河南省超滤净化设备有限公司 一种过滤滤网焊接设备
CN117464262B (zh) * 2023-12-26 2024-03-12 河南省超滤净化设备有限公司 一种过滤滤网焊接设备

Also Published As

Publication number Publication date
CN111872519B (zh) 2024-05-14
CN111872519A (zh) 2020-11-03
DE212020000716U1 (de) 2022-04-26

Similar Documents

Publication Publication Date Title
WO2022041505A1 (zh) 一种直缝焊管焊接用保护气体装置、焊接装置及焊接方法
EP1440946B1 (en) Method and apparatus for processing a preform for an optical fibre using a burner
KR100651146B1 (ko) 유리 모재를 제조하는 장치 및 그 방법
JP2011088154A (ja) レーザ加工ヘッド、及びレーザ肉盛方法
CN101745726A (zh) 双丝熔化极气体保护焊焊炬及其焊接方法
CN104736289B (zh) 激光加工头和用于激光加工头的环形喷嘴
CN111673331A (zh) 一种用于焊管焊接的内保护气杆
CA2210593A1 (en) Process and device for making a cylindrical component from glass
WO2022016799A1 (zh) 一种钢管生产用焊接装置
US1946305A (en) Welding apparatus
CN212495896U (zh) 一种用于直缝焊管内焊缝余高的控制装置
CN205702850U (zh) 激光焊接保护气装置
CN106825877A (zh) 不锈钢方管焊接工艺
CN212311241U (zh) 一种用于焊管焊接的内保护气杆
US2462808A (en) Manufacture of tubular glassware
CN107199340B (zh) 一种金属粉末成形装置头
JP2007070187A (ja) 光ファイバ線引方法
US7343761B2 (en) Device for producing a glass rod
JP5598872B2 (ja) 光ファイバ母材の製造方法
CN112010543A (zh) 喷灯及石英管内抛光装置
WO2023279412A1 (zh) 风刀及清洗设备
CN111825320A (zh) 一种灯丝灯芯柱喇叭冷却装置
JP3910806B2 (ja) 光ファイバ母材の製造方法
US3824088A (en) Welded multiple glazing units
US2486737A (en) Method of manufacturing glassware

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20951173

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 20951173

Country of ref document: EP

Kind code of ref document: A1