CN101966619A - Method for welding assembly welding part of ultrahigh voltage electric power tower - Google Patents

Method for welding assembly welding part of ultrahigh voltage electric power tower Download PDF

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Publication number
CN101966619A
CN101966619A CN 201010514766 CN201010514766A CN101966619A CN 101966619 A CN101966619 A CN 101966619A CN 201010514766 CN201010514766 CN 201010514766 CN 201010514766 A CN201010514766 A CN 201010514766A CN 101966619 A CN101966619 A CN 101966619A
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China
Prior art keywords
welding
oxide layer
electric power
welded
voltage electric
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CN 201010514766
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高宝良
张兴明
杨忠
郑爱梅
赵绪奎
姜夕泉
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JIANGSU XIANGYU POWER EQUIPMENT MANUFACTURING Co Ltd
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JIANGSU XIANGYU POWER EQUIPMENT MANUFACTURING Co Ltd
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Priority to CN 201010514766 priority Critical patent/CN101966619A/en
Publication of CN101966619A publication Critical patent/CN101966619A/en
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Abstract

The invention discloses a method for welding an assembly welding part of an ultrahigh voltage electric power tower. The method comprises the following steps: (1) a welding edge of a vertical board of the assembly welding part is subject to single-side breach by a breaching machine, the breached vertical board is stood on a regulated position at which two vertical boards are oppositely arranged in a V-shaped opening of steel angle, and welding is implemented by a dried welding rod; (2) the breached side of the welding edge of the vertical board in the step (1) is welded (weld penetration is necessarily ensured, and the weld joint of the penetrating side has good molding), after the welding on the breached side is completed, the temperature of the side to be welded is cooled to the temperature of 150 DEG C below, and the opposite side is welded; and (3) before the opposite side in the step (2) is welded, the oxide layer on the opposite side, or the oxide layer and overlap are removed, wherein a brush made of a hard material is used to brush the oxide layer until the welded oxide layer on the surface is removed, and the overlap is removed by a polishing machine, so that welding can be directly applied after the oxide layer and the overlap are cleaned.

Description

Extra-high voltage electric power iron tower group welding piece welding method
Technical field
The present invention relates to the transmission facility technical field, be specifically related to the extra-high voltage electric power tower.
Background technology
The planning of a few days ago announcing according to State Grid Corporation of China, China will build up " three vertical three horizontal looped networks " before 2015, and build up the extra-high voltage direct-current transmission engineering 11 times, estimate that the extra-high voltage investment of the five-year China will reach more than 2,700 hundred million yuan, to the year two thousand twenty, this network of China's extra-high voltage will be expanded more.Electric power tower is the basis of high voltage power transmission engineering, and the supporter of circuit influences high voltage power transmission engineering safety, stable, lasting operation in the robustness of iron tower and service life, has deciding factor.Safe and reliable extra-high voltage electric power iron tower is provided, could satisfies the requirement of the long distance of electrical network, large-capacity power conveying.
The key technology of extra-high voltage electric power iron tower in process welded exactly, and particularly the weld seam of hanging point key position requires to be generally first-order weld.At present; at iron tower of power transmission line; all be to adopt carbon dioxide gas shiled welding technology in the welding of steel structures such as steel pipe pole and power transformation structure support; weld assembly for the following iron tower of power transmission line of 500kV; because the weld seam class requirement generally mostly is secondary or more mostly is three grades of weld seams; therefore; the welding difficulty is little; operation easily; once weld the compliance rate height; but for the weld assembly of the extra-high voltage electric power iron tower more than the 750kV, its weld seam class requirement is an one-level, according to existing welding procedure specification (WPS) operation; it is lower once to weld compliance rate, and the enterprise that weld horizontal is high also only can reach 50%.Trace it to its cause, the one, because that the scope of operation can be welded in this position is narrow and small, welding operation, comprise that the carbon slag in the welding process, the cleaning operation of oxide layer be inconvenient to cause; The 2nd, existing welding procedure generally is after weld assembly one side welds, remove welding slag in opposite side with the method for carbon element gouge, and then polish with sanding machine, the carbon granules that is bonded in the commissure is often cleared up unclean, cause welding and produce bubble in the entity, compliance rate is once welded in influence.
How to improve the compliance rate of extra-high voltage electric power iron tower first-order weld group welding piece, reduce the defective products loss late, cost efficiency is the problem that present the sector is endeavoured to diplomatize.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of extra-high voltage electric power tower group welding piece welding method, implements welding with this method, few, the high efficiency of operation, and the once welding compliance rate of what is more important first-order weld can reach more than 90%.
Group welding piece of the present invention is meant in the V-shaped part of angle steel and is welded with two risers at interval, will carry out two-sided welding (being butt welding) according to the solder side of technological requirement riser and main material angle steel.
The present invention is achieved through the following technical solutions:
Extra-high voltage electric power tower group welding piece welding method comprises the following steps:
(1) with the cut machine riser welding edge of group welding piece is carried out the single face cut, the riser behind the cut is stood on assigned position in the angle steel V-shaped part (cut of two risers is staggered relatively), implement welding with welding rod through oven dry;
(2) this that earlier the riser welding edge of step (1) was made cut simultaneously welds (must guarantee penetration, the permeable face appearance of weld is better), and after this simultaneously welded and finishes, to be welded temperature was cooled to below 150 ℃, again to opposite one side welding;
(3) to before the opposite one side welding of step (2) riser, to remove oxide layer or oxide layer and the overlap of this one side, earlier with the hairbrush thorn brush of hard material, until surface soldered oxide layer brush is taken off, overlap is wherein removed with sanding machine, remove clean directly welding later on.
The further improvement project of the present invention is, the hairbrush of described hard material is a wire brush, and the head that the bristle of wire brush connects base plate is tack or is tip (head that connects base plate is that tip is preferable) that during for tip, the tip top is provided with the pugil bristle at least.
The present invention further improvement project is that riser welding edge cut bevel altitude is 1-4mm.
After the present invention simultaneously implements welding to the riser of group welding piece, before another side is implemented welding, only need face of weld to be stung brush with wire brush, oxide layer can be eliminated, need not to remove surface oxide layer and after removing surface oxide layer, remove the carbon granules that the gouge method stays with sanding machine again with carbon element gouge method, compared with prior art, have following outstanding advantage:
The one, the present invention has thoroughly stopped carbon element gouge method and has removed the secondary pollution (residual carbon granules) that surface oxide layer causes solder side, reach more than 90% thereby make extra-high voltage electric power iron tower group welding piece hanging point key position place first-order weld once weld compliance rate, compliance rate of butt weld welding reaches more than 95%; The once welding compliance rate of second-order weld reaches more than 98%, compliance rate 100% of butt weld welding.
The 2nd, owing to the compliance rate height is once welded in one-level of the present invention, second-order weld, improved raw-material utilization rate, to compare with former technology, group welding piece can be saved steel 30%, and production cost can descend 50%.
The 3rd, welding operation flow process of the present invention is short, because weld seam once welds compliance rate height (repair rate is low), has improved operating efficiency greatly simultaneously.The weld seam grade is that original 4 times, first-order weld are original 3 times to the operating efficiency of welding for the operating efficiency of one-level T-shape welding; The weld seam grade is that original 3 times, second-order weld are original 2 times to the operating efficiency of welding for the operating efficiency of secondary T-shape welding.
The 4th, riser welding edge cut bevel altitude is 1-4mm, is good with 3mm, has made things convenient for fusion and melts.
Description of drawings
Fig. 1 is a group welding piece schematic diagram of the present invention.
Fig. 2 is that Figure 1A is to schematic diagram.
Fig. 3 is the wire brush schematic diagram.
1 is angle steel among the figure, and 2 is riser, and 3 is weld seam, and 4 is the bristle connection base plate of wire brush, and 5 is bristle.
The specific embodiment
Extra-high voltage electric power tower group welding piece welding method comprises the following steps:
(1) with the cut machine riser welding edge of group welding piece is carried out the single face cut, the cut bevel altitude is 3mm, riser behind the cut is stood on assigned position in the angle steel V-shaped part (cut of two risers is staggered relatively), with implementing welding through the welding rod after the 100-150 ℃ of oven dry;
(2) this that earlier the riser welding edge of step (1) was made cut simultaneously welds, spot welding is apart from the termination 30mm starting the arc, spot welding length 30-50mm is advisable, spot welding weldering meat height is welding height 1/2, solder side to a postwelding is removed oxide layer, and then executes full weld, after this simultaneously welds and finishes, to be welded temperature is cooled to below 150 ℃, again to opposite one side welding;
(3) to before the opposite one side welding of step (2) riser, remove, with wire brush thorn brush,, overlap wherein be removed with sanding machine earlier, directly welding after removing is clean until surface soldered oxide layer brush is taken off to this oxide layer and overlap simultaneously.
In the present embodiment, the head that the bristle of wire brush connects base plate is a tip, and the tip top is provided with the pugil bristle, is convenient to the removing to stenosis.
In the present embodiment, adopt carbon dioxide gas arc welding.Used welding current such as following table:
Figure BDA0000029075880000041
The group welding piece that present embodiment obtains, hanging point key position place first-order weld once welds compliance rate and reaches 91%, and compliance rate of butt weld welding is 96%.The once welding compliance rate of second-order weld reaches 98%, compliance rate 100% of butt weld welding.

Claims (4)

1. extra-high voltage electric power iron tower group welding piece welding method is characterized in that comprising the following steps:
(1) with the cut machine riser welding edge of group welding piece is carried out the single face cut, the riser behind the cut is stood on assigned position in the angle steel V-shaped part, implement welding with welding rod through oven dry;
(2) this that earlier the riser welding edge of step (1) was made cut simultaneously welds, and after this simultaneously welded and finishes, to be welded temperature was cooled to below 150 ℃, again to opposite one side welding;
(3) to before the opposite one side welding of step (2) riser, to remove oxide layer or oxide layer and the overlap of this one side, earlier with the hairbrush thorn brush of hard material, until surface soldered oxide layer brush is taken off, overlap is wherein removed with sanding machine, remove clean directly welding later on.
2. extra-high voltage electric power tower group welding piece welding method as claimed in claim 1, it is characterized in that: the hairbrush of described hard material is a wire brush.
3. extra-high voltage electric power tower group welding piece welding method as claimed in claim 2 is characterized in that: the head that the bristle of described wire brush connects base plate is tack or is tip that during for tip, the tip top is provided with the pugil bristle at least.
4. extra-high voltage electric power tower group welding piece welding method as claimed in claim 1 is characterized in that: riser welding edge cut bevel altitude is 1-4mm.
CN 201010514766 2010-10-21 2010-10-21 Method for welding assembly welding part of ultrahigh voltage electric power tower Pending CN101966619A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114054909A (en) * 2021-11-10 2022-02-18 唐旭勇 Metal plate welding machine and welding process thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59166382A (en) * 1984-03-12 1984-09-19 Mitsubishi Heavy Ind Ltd Welding method of joint formed of different materials
JPS61129283A (en) * 1984-11-29 1986-06-17 Mitsubishi Heavy Ind Ltd Welding method of fillet weld joint
CN101700600A (en) * 2009-11-19 2010-05-05 河南第一火电建设公司 Welding process method of novel Q460 steel for transmission tower

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59166382A (en) * 1984-03-12 1984-09-19 Mitsubishi Heavy Ind Ltd Welding method of joint formed of different materials
JPS61129283A (en) * 1984-11-29 1986-06-17 Mitsubishi Heavy Ind Ltd Welding method of fillet weld joint
CN101700600A (en) * 2009-11-19 2010-05-05 河南第一火电建设公司 Welding process method of novel Q460 steel for transmission tower

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《经营管理者》 陈万银 特高压铁塔用低合金高强钢的焊接规范参数研究 , 第21期 2 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114054909A (en) * 2021-11-10 2022-02-18 唐旭勇 Metal plate welding machine and welding process thereof

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Application publication date: 20110209