CN105547005A - Large-size thin-wall connector butt welding structure and method - Google Patents
Large-size thin-wall connector butt welding structure and method Download PDFInfo
- Publication number
- CN105547005A CN105547005A CN201610038200.5A CN201610038200A CN105547005A CN 105547005 A CN105547005 A CN 105547005A CN 201610038200 A CN201610038200 A CN 201610038200A CN 105547005 A CN105547005 A CN 105547005A
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- China
- Prior art keywords
- middleware
- low pressure
- pressure cylinder
- welding
- steam drain
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a large-size thin-wall connector butt welding structure. A connecting intermediate piece similar to a flange structure is arranged between a turbine low-pressure cylinder exhaust port and a condenser throat inlet, wherein a false flange is short for the connecting intermediate piece. The connecting intermediate piece is in a plate shape, the turbine low-pressure cylinder exhaust port is welded to one side of the connecting intermediate piece, and the condenser throat inlet is welded to the other side of the connecting intermediate piece. By means of the butt welding structure, the welding problem caused by the overlarge misalignment due to deformation in the large-size thin-wall connector manufacturing process can be effectively solved, and on the premise that the quality is guaranteed, the manufacturing and constructing difficulty can be lowered, and operation is easy and convenient.
Description
Technical field
The invention belongs to clammy condenser of thermal generator set manufacture and installing engineering field, be specifically related to a kind of large size, thin walled interface docking Welding Structure and method.
Background technology
At present in wet cooling gas turbine group, turbine low pressure cylinder steam discharge enters throat's entrance of condenser downwards, in the process of construction of unit, must condenser throat entrance and turbine low pressure cylinder steam drain be coupled together at the construction field (site).Because condenser throat entrance opening dimension is larger, for 300MW unit, its condenser throat entrance opening dimension is about 7500X5000mm, for the interface unit of this size, certainly exists large-size distortion in manufacture (welding) process.Therefore in concrete engineering Construction Practice, turbine low pressure cylinder steam drain is wanted directly to dock at the construction field (site) with condenser throat entrance, because both are all large size, thin walled interface, there is larger size distortion amount, if adopt shown in picture Fig. 1 and directly dock two interface modes, because size distortion amount causes upper and lower parts horizontal displacement comparatively large, aligning welding can be a very difficult thing, and construction quality can not be guaranteed.
Summary of the invention
One is the object of the present invention is to provide to utilize specific connection assist, the Welding Structure of two the large size, thin walled interfaces realizing easily producing size distortion when docking and method.
To achieve these goals, the invention provides a kind of large size, thin walled interface docking Welding Structure, comprise turbine low pressure cylinder steam drain, condenser throat entrance, connect middleware, it is characterized in that, between turbine low pressure cylinder steam drain and condenser throat entrance, place the connection middleware of a similar flange arrangement, connecting middleware is tabular, turbine low pressure cylinder steam drain welds with the side being connected middleware, and condenser throat entrance welds with the opposite side being connected middleware.
Further, connect middleware to be processed into by steel plate.
Further, connect middleware and have the shape of similar flange, periphery does not distribute flange connecting hole.
Further, connect middleware and there are the shape and size consistent with turbine low pressure cylinder steam drain.
Further, connecting middleware width is 20-200mm, selects thickness to be the carbon sheet of 10-50mm.
Also provide a kind of large size, thin walled interface docking welding method, be applied to the docking welding between turbine low pressure cylinder steam drain, condenser throat entrance, it comprises the following steps:
According to turbine low pressure cylinder steam drain shape and size, prefabricated corresponding connection middleware;
Between turbine low pressure cylinder steam drain and condenser throat entrance, according to the thickness connecting middleware, reserve corresponding clearance distance;
Connection middleware is placed between turbine low pressure cylinder steam drain and condenser throat entrance;
Turbine low pressure cylinder steam drain welds with the side being connected middleware, and condenser throat entrance welds with the opposite side being connected middleware.
Further, when prefabricated connection middleware, connect middleware and there are the shape and size consistent with turbine low pressure cylinder steam drain; Connecting middleware adopts steel plate to be processed into, and connect middleware after completing, have the face shaping of similar flange, periphery does not distribute flange connecting hole.
Further, connect before middleware putting into, bevel for welding treatment process carried out to upper and lower pipe interface part, for the welding procedure be connected between middleware; The thickness that reserved clearance distance equals to connect middleware adds the welded gaps of twice, and welded gaps gets 1-3mm.
Further, connect the width of middleware, determine according to dislocation deflection when docking between low pressure (LP) cylinder steam drain with condenser throat entrance during site operation, the material thickness of thickness needed for welding procedure and and interface pressure determine.
Further, when welding connection middleware, first carry out attaching parts lower weld, utilize multiple wedge type instrument to insert and connect between middleware and condenser throat inlet contact face, gap is adjusted to required welded gaps, be fixedly connected with middleware position by spot welding, remove wedge type instrument and carry out lower weld; After lower weld completes, then carry out upper weld; The top and the lower weld that connect middleware is carried out at interface internal; Remove interface internal and outside long connection middleware, retaining and connecting middleware edge far from weld edge distance is 10-30mm.
The present invention is when carrying out the welding of the docking between turbine low pressure cylinder steam drain and condenser throat entrance, adopt the connection middleware of similar flange arrangement to carry out auxiliary construction, quick, convenient, effectively can solve the excessive welding difficult problem caused of unfitness of butt joint of being out of shape and causing.
Accompanying drawing explanation
Fig. 1 is existing interface docking Welding Structure schematic diagram;
Fig. 2 adopts to connect middleware Welding Structure schematic diagram;
Wherein 1 turbine low pressure cylinder steam drain, 2 condenser throat entrances, 3 connect middleware, 4 weld seams
Detailed description of the invention
Below in conjunction with accompanying drawing 2, the invention will be further described, should be appreciated that content described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
As shown in Figure 2, Welding Structure involved in the present invention comprises turbine low pressure cylinder steam drain, condenser throat entrance, connects middleware, between turbine low pressure cylinder steam drain and condenser throat entrance, the connection middleware of a similar flange arrangement is set, be called for short dummy-flange, connecting middleware is tabular, and turbine low pressure cylinder steam drain welds with the side being connected middleware, and condenser throat entrance welds with the opposite side being connected middleware.
The present invention is in construction and installation process, first according to the prefabricated corresponding connection middleware of turbine low pressure cylinder steam drain, connect middleware and there are the shape and size consistent with turbine low pressure cylinder steam drain, steel plate can be adopted to be processed into, steel plate has one fixed width, rationally determine according to dislocation deflection when docking between low pressure (LP) cylinder steam drain with condenser throat entrance during site operation, about optional 20-200mm is wide, thickness can material thickness needed for welding procedure and interface pressure Rational choice, about optional 10-50mm.This connection middleware after finalization of the manufacture, has the face shaping of similar flange, the flange connecting hole but periphery does not distribute; Between turbine low pressure cylinder steam drain and condenser throat entrance, according to the thickness of prefabricated attaching parts, reserve corresponding clearance distance, clearance distance equals to connect the welded gaps that the thickness of middleware adds twice, and welded gaps gets 1-3mm; Bevel for welding treatment process is carried out to upper and lower pipe interface part, for the welding procedure be connected between middleware; Be placed in by connection middleware between turbine low pressure cylinder steam drain and condenser throat entrance, turbine low pressure cylinder steam drain welds with the side being connected middleware, and condenser throat entrance welds with the opposite side being connected middleware; First carry out connection middleware lower weld, utilize multiple wedge type instrument to insert and connect between middleware and condenser throat inlet contact face, its gap is adjusted to required welded gaps, by spot welding fixed connecting part position, removes wedge type instrument and carry out lower weld; After lower weld completes, then carry out upper weld; Connection middleware top and lower weld is carried out at interface internal; Remove interface internal and outside long connection middleware, retaining and connecting middleware edge far from weld edge distance is 10-30mm.So just quick, convenient, effectively can solve the excessive welding difficult problem caused of unfitness of butt joint of being out of shape and causing.
Last it is noted that the foregoing is only explanation of the present invention, be not limited to the present invention, although to invention has been detailed description, for a person skilled in the art, it still can be modified to aforementioned described technical scheme, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a large size, thin walled interface docking Welding Structure, comprise turbine low pressure cylinder steam drain, condenser throat entrance, connect middleware, it is characterized in that, between turbine low pressure cylinder steam drain and condenser throat entrance, place the connection middleware of a similar flange arrangement, connecting middleware is tabular, and turbine low pressure cylinder steam drain welds with the side being connected middleware, and condenser throat entrance welds with the opposite side being connected middleware.
2. Welding Structure according to claim 1, is characterized in that, connects middleware and is processed into by steel plate.
3. Welding Structure according to claim 1, is characterized in that, connects middleware and has the shape of similar flange, and periphery does not distribute flange connecting hole.
4. Welding Structure according to claim 1, is characterized in that, connects middleware and has the shape and size consistent with turbine low pressure cylinder steam drain.
5. Welding Structure according to claim 2, is characterized in that, connecting middleware width is 20-200mm, selects thickness to be the carbon sheet of 10-50mm.
6. a large size, thin walled interface docking welding method, be applied to the docking welding between turbine low pressure cylinder steam drain, condenser throat entrance, it comprises the following steps:
According to turbine low pressure cylinder steam drain shape and size, prefabricated corresponding connection middleware;
Between turbine low pressure cylinder steam drain and condenser throat entrance, according to the thickness connecting middleware, reserve corresponding clearance distance;
Connection middleware is placed between turbine low pressure cylinder steam drain and condenser throat entrance;
Turbine low pressure cylinder steam drain welds with the side being connected middleware, and condenser throat entrance welds with the opposite side being connected middleware.
7. welding method according to claim 6, is characterized in that, when prefabricated connection middleware, connects middleware and has the shape and size consistent with turbine low pressure cylinder steam drain; Connecting middleware adopts steel plate to be processed into, and connect middleware after completing, have the face shaping of similar flange, periphery does not distribute flange connecting hole.
8. welding method according to claim 6, is characterized in that, connects before middleware putting into, carries out bevel for welding treatment process to upper and lower pipe interface part, for the welding procedure be connected between middleware; The thickness that reserved clearance distance equals to connect middleware adds the welded gaps of twice, and welded gaps gets 1-3mm.
9. welding method according to claim 7, it is characterized in that, connect the width of middleware, determine according to dislocation deflection when docking between low pressure (LP) cylinder steam drain with condenser throat entrance during site operation, the material thickness of thickness needed for welding procedure and and interface pressure determine.
10. welding method according to claim 6, it is characterized in that, when welding connection middleware, first carry out attaching parts lower weld, utilize multiple wedge type instrument to insert and connect between middleware and condenser throat inlet contact face, gap is adjusted to required welded gaps, is fixedly connected with middleware position by spot welding, remove wedge type instrument and carry out lower weld; After lower weld completes, then carry out upper weld; The top and the lower weld that connect middleware is carried out at interface internal; Remove interface internal and outside long connection middleware, retaining and connecting middleware edge far from weld edge distance is 10-30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610038200.5A CN105547005A (en) | 2016-01-14 | 2016-01-14 | Large-size thin-wall connector butt welding structure and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610038200.5A CN105547005A (en) | 2016-01-14 | 2016-01-14 | Large-size thin-wall connector butt welding structure and method |
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| CN105547005A true CN105547005A (en) | 2016-05-04 |
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| CN201610038200.5A Pending CN105547005A (en) | 2016-01-14 | 2016-01-14 | Large-size thin-wall connector butt welding structure and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107186316A (en) * | 2017-05-22 | 2017-09-22 | 山东电力建设第工程公司 | It is a kind of to connect the distortion-free welding procedure of condenser welding for large-size steam turbine low pressure (LP) cylinder |
| CN110744269A (en) * | 2019-11-25 | 2020-02-04 | 南通振华重型装备制造有限公司 | Manufacturing and mounting method of tire crane support leg flange |
Citations (7)
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|---|---|---|---|---|
| JPH10103879A (en) * | 1996-09-30 | 1998-04-24 | Toshiba Corp | Installing method of single-barrel type condenser |
| US20010007331A1 (en) * | 2000-01-12 | 2001-07-12 | Machida Steel Structure Corporation | One-side welding method for steel structure |
| CN2934585Y (en) * | 2006-07-19 | 2007-08-15 | 上海汽轮机有限公司 | Low pressure air inlet interior and exterior cylinder swelling joint sealing device for turbine |
| CN102425958A (en) * | 2011-10-24 | 2012-04-25 | 北京京海华诚能源科技有限公司 | All-welded plate shell type stainless steel condenser and application thereof |
| CN203550740U (en) * | 2013-10-08 | 2014-04-16 | 上海埃易能源科技有限公司 | Power station condenser throat part with flow guide device |
| CN104930906A (en) * | 2015-03-17 | 2015-09-23 | 黄洁 | Condenser throat flow field optimizing effect testing and transforming method |
| CN205580230U (en) * | 2016-01-14 | 2016-09-14 | 大唐(北京)能源管理有限公司 | Jumbo size thin wall interface butt joint welded structure |
-
2016
- 2016-01-14 CN CN201610038200.5A patent/CN105547005A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10103879A (en) * | 1996-09-30 | 1998-04-24 | Toshiba Corp | Installing method of single-barrel type condenser |
| US20010007331A1 (en) * | 2000-01-12 | 2001-07-12 | Machida Steel Structure Corporation | One-side welding method for steel structure |
| CN2934585Y (en) * | 2006-07-19 | 2007-08-15 | 上海汽轮机有限公司 | Low pressure air inlet interior and exterior cylinder swelling joint sealing device for turbine |
| CN102425958A (en) * | 2011-10-24 | 2012-04-25 | 北京京海华诚能源科技有限公司 | All-welded plate shell type stainless steel condenser and application thereof |
| CN203550740U (en) * | 2013-10-08 | 2014-04-16 | 上海埃易能源科技有限公司 | Power station condenser throat part with flow guide device |
| CN104930906A (en) * | 2015-03-17 | 2015-09-23 | 黄洁 | Condenser throat flow field optimizing effect testing and transforming method |
| CN205580230U (en) * | 2016-01-14 | 2016-09-14 | 大唐(北京)能源管理有限公司 | Jumbo size thin wall interface butt joint welded structure |
Non-Patent Citations (1)
| Title |
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| 孙立权,张家刚: "核电机组凝汽器与低压缸焊接中的变形控制", 焊接技术 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107186316A (en) * | 2017-05-22 | 2017-09-22 | 山东电力建设第工程公司 | It is a kind of to connect the distortion-free welding procedure of condenser welding for large-size steam turbine low pressure (LP) cylinder |
| CN110744269A (en) * | 2019-11-25 | 2020-02-04 | 南通振华重型装备制造有限公司 | Manufacturing and mounting method of tire crane support leg flange |
| CN110744269B (en) * | 2019-11-25 | 2021-07-06 | 上海振华重工(集团)股份有限公司南通分公司 | Manufacturing and mounting method of tire crane support leg flange |
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