CN104374526A - Helium leakage detecting device and method for expansion joint of condenser - Google Patents
Helium leakage detecting device and method for expansion joint of condenser Download PDFInfo
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- CN104374526A CN104374526A CN201310348814.XA CN201310348814A CN104374526A CN 104374526 A CN104374526 A CN 104374526A CN 201310348814 A CN201310348814 A CN 201310348814A CN 104374526 A CN104374526 A CN 104374526A
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- helium
- expansion joint
- condenser
- leakage detecting
- suction gun
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Abstract
The invention belongs to the technical field of non-destructive detection of thermal power plants and particularly relates to a helium leakage detecting device and method for an expansion joint of a condenser. The helium leakage detecting device for the expansion joint of the condenser comprises a helium charging cavity, a helium tank, a suction gun and a helium mass spectrometer, wherein the helium charging cavity is formed in the outer side of the expansion joint of the condenser, the helium tank is connected with the helium charging cavity, and the suction gun is connected with the helium mass spectrometer. The helium leakage detecting method based on the helium leakage detecting device comprises the following steps that the helium charging cavity in the periphery of the expansion joint of the condenser is filled with helium through the helium tank, positive-pressure helium is obtained, air existing on the expansion joint connecting portion of the condenser is sucked by means of the suction gun, the helium content of the sucked air is analyzed through the helium mass spectrometer, and then the sealing performance of the expansion joint of the condenser is confirmed. When the method is used for leakage detection, the positive-pressure helium condition is established outside the expansion joint, helium leakage detection is conducted on the expansion joint inside the condenser after an original expansion joint is replaced by the expansion joint, and the purposes of simplifying working processes, simplifying operating processes, shortening the construction period, avoiding risks and cutting down expenses are achieved.
Description
Technical field
The invention belongs to heating power power plant technical field of nondestructive testing, be specifically related to a kind of condenser expansion joint helium-leakage detecting apparatus and method.
Background technology
Heating power power plant steam turbine each low pressure (LP) cylinder steam discharge throat is connected with bottom condenser rubber expansion joint, as the vitals connecting low pressure (LP) cylinder and condenser, its function is that exhaust casing and condenser vapour chamber are unified into a tight chamber, set up and keep vacuum, the potential difference change caused and energy effective compensation cylinder body and condenser cylindrical shell expand with heat and contract with cold, slows down too drastic vibrations and relative displacement.
Expansion joint designed life is 10 years, and its aging, bolt produced of run duration gets loose, rubber and wall body combination seal is tight etc. all can cause soften(ing), affects unit output, serious also can cause shutting down, shutdown.Unit operation is after 10 years, and expansion joint need carry out integral replacing.Intact in order to confirm the expansion joint installation quality after changing, there is not leakage (leak source or imprecision will have a strong impact on unit vacuum tightness), then need to check expansion joint sealing.
The traditional method that expansion joint changes rear leak check is all adopt water-filling leakage detection (water logging method) substantially, fill water by condenser and be poured into the height of more than expansion joint about a meter always, then checked whether that water spills from condenser external visual, confirmed the installation quality of condenser expansion joint with this.The method enforcement difficulty is large, risk is high, need to carry out bracing reinforcement with anti-deformation to condenser water box body, and isolate a large amount of valve, need in addition inject and discharge a large amount of demineralized water (more than 3600 tons), check and prepare and the time of enforcement longer (front and back at least need 6 days), Checking on effect is directly perceived not and desirable, there is unreachable region, is difficult to effectively check and difficult after finding leak source to minute leakage.
Summary of the invention
The object of the present invention is to provide a kind of the condenser expansion joint helium-leakage detecting apparatus and the method that are applied to the rear leak check of condenser expansion joint installation, to overcome prior art above shortcomings.
For achieving the above object, the technical solution used in the present invention is:
A kind of condenser expansion joint helium-leakage detecting apparatus, this device comprises and fills helium chamber, helium tank, suction gun, helium mass analyzer; The arranged outside of condenser expansion joint has fills helium chamber, helium tank with fill helium chamber and be connected, suction gun is connected with helium mass analyzer.
A kind of condenser expansion joint helium leak test method, the method is as follows: fill helium by helium tank filling in helium chamber of condenser expansion joint periphery, set up malleation helium, use suction gun absorption at the air of condenser expansion joint connecting portion, analyze the helium content in institute's suck with helium mass analyzer, confirm the sealing property of condenser expansion joint.
Beneficial effect acquired by the present invention is:
Adopt the present invention can to detect the condenser expansion joint sealing after installation, adjustment is implemented to detecting abnormal region, confirm expansion joint installation quality, the installation supported reinforced by the condenser simultaneously avoided needed for traditional water-filling leakage detection, a large amount of leakage detection demineralized waters, avoid the impact of water-filling hydraulic pressure on the part of appliance such as condenser shell and support, decrease extensive work amount, shorten power plant's maintenance duration.
Adopt the method for the invention leakage detection, set up helium positive pressure in expansion joint outside, expansion joint carries out helium leak check work in condenser inside to expansion joint after changing, and can realize simplifying operation, reducing operation, the reduction of erection time, avoid risk, expense of cutting down expenses.
Accompanying drawing explanation
Fig. 1 is condenser expansion joint helium-leakage detecting apparatus structural drawing of the present invention;
In figure: 1, condenser expansion joint; 2, helium chamber is filled; 3, helium tank; 4, suction gun; 5, helium mass analyzer.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in more detail.
As shown in Figure 1, condenser expansion joint helium-leakage detecting apparatus of the present invention comprises and fills helium chamber 2, helium tank 3, suction gun 4, helium mass analyzer 5; The arranged outside of condenser expansion joint 1 has fills helium chamber 2, helium tank 3 with fill helium chamber 2 and be connected, suction gun 4 is connected with helium mass analyzer 5;
Condenser expansion joint helium leak test method of the present invention is as follows: fill helium by helium tank 3 filling in helium chamber 2 of condenser expansion joint 1 periphery, set up malleation helium, use suction gun 4 draws the air at condenser expansion joint 1 connecting portion, the helium content in institute's suck is analyzed with helium mass analyzer 5, confirm the sealing property of condenser expansion joint 1, confirm whether condenser expansion joint 1 exists leakage, confirm installation quality.
Claims (2)
1. a condenser expansion joint helium-leakage detecting apparatus, is characterized in that: this device comprises and fills helium chamber (2), helium tank (3), suction gun (4), helium mass analyzer (5); The arranged outside of condenser expansion joint (1) has fills helium chamber (2), helium tank (3) with fill helium chamber (2) and be connected, suction gun (4) is connected with helium mass analyzer (5).
2. a condenser expansion joint helium leak test method, it is characterized in that: the method is as follows: fill helium by helium tank (3) in peripheral the filling in helium chamber (2) of condenser expansion joint (1), set up malleation helium, use suction gun (4) absorption at the air of condenser expansion joint (1) connecting portion, analyze the helium content in institute's suck with helium mass analyzer (5), confirm the sealing property of condenser expansion joint (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310348814.XA CN104374526A (en) | 2013-08-12 | 2013-08-12 | Helium leakage detecting device and method for expansion joint of condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310348814.XA CN104374526A (en) | 2013-08-12 | 2013-08-12 | Helium leakage detecting device and method for expansion joint of condenser |
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| Publication Number | Publication Date |
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| CN104374526A true CN104374526A (en) | 2015-02-25 |
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Family Applications (1)
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| CN201310348814.XA Pending CN104374526A (en) | 2013-08-12 | 2013-08-12 | Helium leakage detecting device and method for expansion joint of condenser |
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| CN (1) | CN104374526A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021356A (en) * | 2015-07-01 | 2015-11-04 | 国网天津市电力公司 | Test method for detecting leakage of hydrogen system of hydrogen-cooled generator |
| CN111829729A (en) * | 2020-06-29 | 2020-10-27 | 国网天津市电力公司电力科学研究院 | Method for detecting leak point by expansion air-saving tightness of gas turbine exhaust pipeline |
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| EP0632258A2 (en) * | 1993-06-29 | 1995-01-04 | Varian Associates, Inc. | Methods and apparatus for detection of large leaks |
| JPH08304217A (en) * | 1995-05-10 | 1996-11-22 | Mitsubishi Heavy Ind Ltd | Method for performing leakage test on expansion joint of condenser |
| US20090025455A1 (en) * | 2006-09-07 | 2009-01-29 | Matheson Tri-Gas, Inc. | Leak Characterization Apparatuses and Methods for Fluid Storage Containers |
| CN201765097U (en) * | 2010-09-10 | 2011-03-16 | 湖北省电力试验研究院 | Helium mass spectrometer leak detection system for steam turbine set vacuum system |
| CN202631207U (en) * | 2012-04-16 | 2012-12-26 | 宁德新能源科技有限公司 | Power battery air tightness detection apparatus |
| CN202814664U (en) * | 2012-08-20 | 2013-03-20 | 中核核电运行管理有限公司 | Air bag apparatus for detecting the performance of expansion joint between steam turbine and condenser |
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2013
- 2013-08-12 CN CN201310348814.XA patent/CN104374526A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0632258A2 (en) * | 1993-06-29 | 1995-01-04 | Varian Associates, Inc. | Methods and apparatus for detection of large leaks |
| JPH08304217A (en) * | 1995-05-10 | 1996-11-22 | Mitsubishi Heavy Ind Ltd | Method for performing leakage test on expansion joint of condenser |
| US20090025455A1 (en) * | 2006-09-07 | 2009-01-29 | Matheson Tri-Gas, Inc. | Leak Characterization Apparatuses and Methods for Fluid Storage Containers |
| CN201765097U (en) * | 2010-09-10 | 2011-03-16 | 湖北省电力试验研究院 | Helium mass spectrometer leak detection system for steam turbine set vacuum system |
| CN202631207U (en) * | 2012-04-16 | 2012-12-26 | 宁德新能源科技有限公司 | Power battery air tightness detection apparatus |
| CN202814664U (en) * | 2012-08-20 | 2013-03-20 | 中核核电运行管理有限公司 | Air bag apparatus for detecting the performance of expansion joint between steam turbine and condenser |
Non-Patent Citations (1)
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| 范垂祯: "再议质谱检漏技术中的喷吹法和吸入法", 《真空》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021356A (en) * | 2015-07-01 | 2015-11-04 | 国网天津市电力公司 | Test method for detecting leakage of hydrogen system of hydrogen-cooled generator |
| CN111829729A (en) * | 2020-06-29 | 2020-10-27 | 国网天津市电力公司电力科学研究院 | Method for detecting leak point by expansion air-saving tightness of gas turbine exhaust pipeline |
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Application publication date: 20150225 |