CN101655435B - High pressure cylinder water pressure test device of combined cycle steam turbine - Google Patents
High pressure cylinder water pressure test device of combined cycle steam turbine Download PDFInfo
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- CN101655435B CN101655435B CN2008102042709A CN200810204270A CN101655435B CN 101655435 B CN101655435 B CN 101655435B CN 2008102042709 A CN2008102042709 A CN 2008102042709A CN 200810204270 A CN200810204270 A CN 200810204270A CN 101655435 B CN101655435 B CN 101655435B
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Abstract
The invention relates to a high pressure cylinder water pressure test device of a steam turbine, in particular to a high pressure cylinder water pressure test device of a combined cycle steam turbine. The test device comprises a cylinder, a flange and press plates, wherein the excircle surface, close to the bottom part, at the left end of the cylinder has a step formed by a circular ring, two end surfaces, which are crossed, at the left of the step correspond to two surfaces of the inner circle surface and the end surface of the middle rib of the high pressure cylinder; the excircle surface at the right end of the cylinder is matched with the inner circle surface of the flange; the flange adopts a protruding platform shape formed by a big barrel and a small barrel, and the excircle surface of the small barrel of the flange corresponds to the inner circle surface of the big barrel of the high pressure cylinder; the end surface of the big barrel of the flange covers the end face of big barrel of the high pressure cylinder; the big barrel of the flange is provided with two circles of screw holes; the flange is pressed on the end surface of the big barrel of the high pressure cylinder by bolts, nuts and the outer circle of screw holes; and a plurality of press plates are connected to the inner circle of screw holes by press plate bolts and fixed on the flange, and the other L-shaped end surfaces of the press plates are pressed on the end surface of the cylinder to evenly press the cylinder toward the middle rib of the high pressure cylinder. The test device of the invention has the advantages of easy manufacture, convenient assembly and disassembly, and no damage to the end surface of the high pressure cylinder.
Description
Technical field
The present invention relates to the steam turbine high-pressure cylinder water test unit.
Background technology
Steam turbine high-pressure cylinder needs to carry out the hydraulic testing before general assembly, the hydraulic testing is an operation very important together in the steam turbine manufacture process, it can check out the internal soundness of steel-casting, ironcasting, soldering group component, than using additive method (X-ray examination, ultrasonic inspection), not only economy but also convenient, particularly can only test with hydraulic test method for the casting flaw of large-scale cylinder and design rigidity etc., the hydraulic testing is one of reliable important assurance of steam turbine workmanship check.
The combination circulation steam turbine high pressure cylinder is according to the final assembly technique requirement, high pressure cylinder need carry out the hydraulic testing, its cylinder subregion is done the hydraulic testing, referring to Fig. 1, tubular--high pressure cylinder large cylinder 11 is " A " zone to subregion greatly and than long with the high pressure cylinder diameter, with the little cylindrical shell 13 of the less and more flat tubular high pressure cylinder of high pressure cylinder diameter is " B " zone, and high pressure cylinder intermediate ribs 12 is positioned at " B " zone, and intermediate ribs 12 separates two different cylindrical shells of diameter.The step of existing hydraulic test method is that the first step at first at the pressure of doing experiment with " A " zone, is used butt-end packing, and is middle with vexed crab bolt tension method, checks whether end face and intermediate ribs leak.Second step pressure of doing experiment in " B " zone, with butt-end packing and vexed crab bolt tension method, 10min is lasted in each zone must not any leakage.
In the total armored pump water of high pressure cylinder process, pressure is 21Mpa during " A " regional testing of high pressure cylinder large cylinder 11, because test pressure and cylinder diameter are bigger, cylinder diameter reaches 1220mm, and it is 3063 tons that high pressure cylinder large cylinder 11 right side large ports bear pressure, high pressure cylinder large cylinder 11 end faces have the screw of 22-M100X6, if butt-end packing is depended merely on 22-M100X6 alloy steel bolt sled tightly, bolt strength is not enough, and screw thread damages easily, and intermediate ribs 12 is yielding." B " of the little cylindrical shell 13 of high pressure cylinder when do experiment in the zone pressure be 6.3Mpa, it is 375 tons that little cylindrical shell 13 left side portlet of high pressure cylinder are born pressure, product end surface has the screw of 16-M24, bolt strength is not enough.
Summary of the invention
The object of the present invention is to provide a kind of high pressure cylinder water pressure test device of combined cycle steam turbine, this test unit is easy to manufacture, and is easy to loading and unloading, can not damage the high pressure cylinder end face, can satisfy the requirement of combination circulation steam turbine high pressure cylinder water pressure test.
The present invention is achieved in that a kind of high pressure cylinder water pressure test device of combined cycle steam turbine, comprises cylinder, flange, pressing plate, bolt, nut and follower bolt;
The cylinder left end has the bottom, and the cylinder left end has the step-like of annulus formation near the periphery of bottom, it is corresponding with two faces of high pressure cylinder intermediate ribs inner headed face and end face that both ends of the surface are intersected on the step-like left side, and step-like annulus external diameter is less than high pressure cylinder large cylinder diameter;
Cylinder right-hand member periphery matches with the flange inner headed face, the boss shape that flange is made up of big or small two cylindrical shells, the little cylindrical shell periphery of flange is corresponding with high pressure cylinder large cylinder inner headed face, flange large cylinder end face covers high pressure cylinder large cylinder end face, on the flange large cylinder, have two circle screws, the outer ring screw is a through hole and corresponding with the screw of high pressure cylinder large cylinder end face, by screw bolt and nut flange is pressed in high pressure cylinder large cylinder end face;
Inner ring screw on the flange large cylinder announces that evenly pressing plate is L shaped, and the polylith pressing plate is circle screw and being fixed on the flange in follower bolt is connected in flange, and the L shaped other end of pressing plate is pressed in the cylinder end face, equably cylinder is pressed to the high pressure cylinder intermediate ribs; Have intercommunicating pore on size two cylindrical shells of flange.
Describedly with the flange inner headed face place of matching the several sealed ring is housed also, between little body end surface of flange and high pressure cylinder large cylinder end face, sealing gasket is housed at cylinder right-hand member periphery; Between step-like and high pressure cylinder intermediate ribs end face sealing gasket is housed at the cylinder left end.
Described test unit also comprises little flange, the left side in the cylinder bottom also has several screws, have several corresponding with it through holes on the little flange, little method is partly covered on the little cylindrical shell left end of high pressure cylinder end face, and tightening screw passes the screw that little flange through hole is connected in the cylinder bottom.
The present invention adopts split cylinder decompression method, when pressure is done experiment in " A " zone of high pressure cylinder large cylinder, reduced the pulling force that high pressure cylinder large cylinder end face screw bears, end-face helical is not fragile, the split cylinder has protected intermediate ribs not to be damaged, and it is easy to operate to adopt pressing plate to compress cylinder simultaneously; When pressure is done experiment in the little cylindrical shell of high pressure cylinder " B " zone, be connected in the little body end surface of high pressure cylinder with little flange by bolt, and load onto tightening screw little flange is strained, increased the little body end surface bolt strength of high pressure cylinder.Test unit of the present invention is easy to manufacture, and is easy to loading and unloading, can not damage the large cylinder and the little body end surface of high pressure cylinder, and the both ends of the surface of intermediate ribs, can satisfy the requirement of combination circulation steam turbine high pressure cylinder water pressure test.
Description of drawings
Fig. 1 is a combination circulation steam turbine high pressure cylinder water pressure test structural representation;
Fig. 2 is a combination circulation steam turbine high pressure cylinder water pressure test method synoptic diagram of the present invention.
Among the figure: 1 flange, 2 cylinders, 3 little flanges, 4 pressing plates, 5 tightening screws, 6 nuts, 7 bolts, 8 follower bolts, 9 intercommunicating pores, 10 little flange bolts; 11 high pressure cylinder large cylinders (diameter 1220mm), 12 high pressure cylinder intermediate ribs (diameter 1000mm), the little cylindrical shell of 13 high pressure cylinders (diameter 771mm), 14 vent holes, 15 sealing rings, 16 first sealing gaskets, 17 second sealing gaskets.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Referring to Fig. 2, a kind of high pressure cylinder water pressure test device of combined cycle steam turbine comprises cylinder 2, flange 1, pressing plate 4, bolt 7, nut 6 and follower bolt 8.Cylinder 2 left ends have the bottom, and cylinder 2 left ends have the step-like of annulus formation near the periphery of bottom, it is corresponding with two faces of high pressure cylinder intermediate ribs 12 inner headed faces and end face that both ends of the surface are intersected on the step-like left side, and step-like annulus external diameter is less than high pressure cylinder large cylinder 11 diameters.
Cylinder 2 right-hand member peripheries match with flange 1 inner headed face, the boss shape that flange 1 is made up of big or small two cylindrical shells, flange 1 little cylindrical shell periphery is corresponding with high pressure cylinder large cylinder 11 inner headed faces, flange 1 large cylinder end face covers high pressure cylinder large cylinder 11 end faces, on flange 1 large cylinder, have two circle screws, the outer ring screw is a through hole and corresponding with the screw of high pressure cylinder large cylinder 11 end faces, by bolt 7 and nut 6 flange 1 is pressed in high pressure cylinder large cylinder 11 end faces.Bolt 7 heads are square, can be used for spanner bolt 7 is screwed in the high pressure cylinder large cylinder 11 end face screws, and nut 6 is pressed in flange 1 on high pressure cylinder large cylinder 11 end faces.
Inner ring screw on flange 1 large cylinder is evenly announced, pressing plate 4 is L shaped, polylith pressing plate 4 is circle screw and being fixed on the flange 1 in follower bolt 8 is connected in flange 1, and the L shaped other end of pressing plate 4 is pressed in cylinder 2 end faces, equably cylinder 2 is pressed to high pressure cylinder intermediate ribs 12.Make high pressure cylinder large cylinder 11 inner headed faces, cylinder 2 peripheries and flange 1 constitute an airtight chamber like this.On size two cylindrical shells of flange 1, have intercommunicating pore 9, airtight chamber is communicated with the outside.
Consider sealing, with the flange 1 inner headed face place of matching three sealing rings 15 are housed also, between flange 1 little body end surface and high pressure cylinder large cylinder 11 end faces, first sealing gasket 16 is housed at cylinder 2 right-hand member peripheries; Between step-like and high pressure cylinder intermediate ribs 12 end faces second sealing gasket 17 is housed at cylinder 2 left ends, and the single face gap of step-like periphery of cylinder 2 left ends and high pressure cylinder large cylinder 11 inner headed faces is less.
High pressure cylinder water pressure test device of combined cycle steam turbine also comprises little flange 3, the left side in cylinder 2 bottoms also has several screws, on the little flange 3 except that have with the corresponding through hole of the little cylindrical shell 13 end face screws of high pressure cylinder, also have and corresponding several through holes of cylinder 2 bottom screws, little flange 3 is connected in outside little cylindrical shell 13 end faces of high pressure cylinder by bolt 10, also passes the screw that little flange 3 through holes are connected in cylinder 2 bottoms by tightening screw 5.
Combination circulation steam turbine high pressure cylinder water pressure test method of the present invention:
At first high pressure cylinder product vertical fixing is placed:
The first step pressure of doing experiment in " A " zone of high pressure cylinder large cylinder 11, cylinder 2, flange 1 are hung down installation, at first sled presses crab bolt 8, prize tight M100X6 bolt 7 and nut 6 again flange 1 is pressed on high pressure cylinder large cylinder 11 end faces, intercommunicating pore 9 water inlets, venting from flange 1 upper end are pressurized to 21Mpa, keep 10min, check whether high pressure cylinder large cylinder 11 end faces and intermediate ribs 12 leak, off-load is to the 8Mpa pressurize then, is in order to offset the do experiment pressure of pressure of " B " zone.
Second step pressure of doing experiment in " B " zone of the little cylindrical shell 13 of high pressure cylinder, side end in the little cylindrical shell 13 of original high pressure cylinder has vent hole 14, little flange 3 is connected in little cylindrical shell 13 end faces of high pressure cylinder by bolt 10, and it is tight with little flange 13 sleds to load onto tightening screw 5, utilize vent hole 14 inputs and be pressurized to 6.3Mpa, keep 10min, check whether the little cylindrical shell 13 of high pressure cylinder leaks, high pressure cylinder water pressure test is finished in off-load after finishing, draining.
The present invention adopts cylinder 2 to reduce high pressure cylinder large cylinder 11 end forces, and the water pressure of doing experiment in " A " zone of high pressure cylinder large cylinder 11 is 21Mpa, and high pressure cylinder large cylinder 11 right side ports bear pressure and are kept to 1003 tons.The pressure of doing experiment in " B " zone of the little cylindrical shell 13 of high pressure cylinder is 6.3Mpa, and it is 375 tons that little cylindrical shell 13 left side portlet of high pressure cylinder are born pressure, adopts stretching screw 5 tensions to carry out the hydraulic testing.Through " A " " B " zone, the on-the-spot hydraulic testing respectively, test unit of the present invention has satisfied high pressure cylinder product hydraulic testing requirement, and mounting or dismounting simultaneously are convenient, solved the high pressure cylinder water pressure test problem that cylinder diameter is big, pressure is big.
Claims (3)
1. a high pressure cylinder water pressure test device of combined cycle steam turbine is characterized in that: comprise cylinder, flange, pressing plate, bolt, nut and follower bolt;
The cylinder left end has the bottom, and the cylinder left end has the step-like of annulus formation near the periphery of bottom, it is corresponding with two faces of high pressure cylinder intermediate ribs inner headed face and end face that both ends of the surface are intersected on the step-like left side, and step-like annulus external diameter is less than high pressure cylinder large cylinder internal diameter;
Cylinder right-hand member periphery matches with the flange inner headed face, the boss shape that flange is made up of big or small two cylindrical shells, the little cylindrical shell periphery of flange is corresponding with high pressure cylinder large cylinder inner headed face, flange large cylinder end face covers high pressure cylinder large cylinder end face, on the flange large cylinder, have two circle screws, the outer ring screw is a through hole and corresponding with the screw of high pressure cylinder large cylinder end face, by screw bolt and nut flange is pressed in high pressure cylinder large cylinder end face;
Inner ring screw on the flange large cylinder evenly distributes, and pressing plate is L shaped, and the polylith pressing plate is connected in flange inner ring screw and is fixed on the flange through follower bolt, and the L shaped other end of pressing plate is pressed in the cylinder end face, equably cylinder is pressed to the high pressure cylinder intermediate ribs; Have intercommunicating pore on size two cylindrical shells of flange.
2. high pressure cylinder water pressure test device of combined cycle steam turbine according to claim 1, it is characterized in that: with the flange inner headed face place of matching the several sealed ring is housed also at cylinder right-hand member periphery, between little body end surface of flange and high pressure cylinder large cylinder end face, sealing gasket is housed; Between step-like and high pressure cylinder intermediate ribs end face sealing gasket is housed at the cylinder left end.
3. high pressure cylinder water pressure test device of combined cycle steam turbine according to claim 1 and 2, it is characterized in that: described test unit also comprises little flange, the left side in the cylinder bottom also has several screws, have several corresponding with it through holes on the little flange, little blind flange is on the little cylindrical shell left end of high pressure cylinder end face, and tightening screw passes the screw that little flange through hole is connected in the cylinder bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102042709A CN101655435B (en) | 2008-12-10 | 2008-12-10 | High pressure cylinder water pressure test device of combined cycle steam turbine |
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| CN2008102042709A CN101655435B (en) | 2008-12-10 | 2008-12-10 | High pressure cylinder water pressure test device of combined cycle steam turbine |
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| CN101655435B true CN101655435B (en) | 2011-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2749861B1 (en) | 2012-12-07 | 2015-08-19 | Sulzer Management AG | Test device for the external housing of a pump and method for testing an external housing of a pump |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128718A (en) * | 2010-12-28 | 2011-07-20 | 东方电气集团东方汽轮机有限公司 | Method for testing water pressure of medium-high pressure outer cylinder of steam turbine |
| CN102128711B (en) * | 2010-12-29 | 2012-10-10 | 东方电气集团东方汽轮机有限公司 | Method for adjusting inner chamber plugging plate for cylinder hydrostatic test of steam turbine |
| CN103364157A (en) * | 2013-07-30 | 2013-10-23 | 东方电气集团东方汽轮机有限公司 | System and method for testing water pressure of turbine cylinder |
| KR101733626B1 (en) * | 2014-01-15 | 2017-05-24 | 두산중공업 주식회사 | Hydrostatic Test Device and Hydrostatic Test Method of High Pressure Turbine |
| CN110238644B (en) * | 2019-07-16 | 2024-01-05 | 中国能源建设集团山西电力建设有限公司 | Butt joint tool and butt joint adjusting method for main valve steam inlet pipe and high-pressure cylinder steam inlet pipe |
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| JP2000180292A (en) * | 1998-12-18 | 2000-06-30 | Kubota Corp | Evaluating method of metallic joint |
| CN2610197Y (en) * | 2002-03-25 | 2004-04-07 | 北京中矿机电工程技术研究所 | High-pressure seal damping flange |
| CN2655223Y (en) * | 2003-11-07 | 2004-11-10 | 东方汽轮机厂 | Sealer for high-pressure external cylinder, valve water pressure testing pipe mouth |
| JP2006329803A (en) * | 2005-05-26 | 2006-12-07 | Mitsubishi Heavy Ind Ltd | Hydraulic test structure and hydraulic test method of high pressure casing |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000180292A (en) * | 1998-12-18 | 2000-06-30 | Kubota Corp | Evaluating method of metallic joint |
| CN2610197Y (en) * | 2002-03-25 | 2004-04-07 | 北京中矿机电工程技术研究所 | High-pressure seal damping flange |
| CN2655223Y (en) * | 2003-11-07 | 2004-11-10 | 东方汽轮机厂 | Sealer for high-pressure external cylinder, valve water pressure testing pipe mouth |
| JP2006329803A (en) * | 2005-05-26 | 2006-12-07 | Mitsubishi Heavy Ind Ltd | Hydraulic test structure and hydraulic test method of high pressure casing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2749861B1 (en) | 2012-12-07 | 2015-08-19 | Sulzer Management AG | Test device for the external housing of a pump and method for testing an external housing of a pump |
| EP2749861B2 (en) † | 2012-12-07 | 2019-01-16 | Sulzer Management AG | Test device for the external housing of a pump and method for testing an external housing of a pump |
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| CN101655435A (en) | 2010-02-24 |
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