CN100594374C - Closed disk for locating and testing nuclear boiler breach U type pipe as well as method - Google Patents
Closed disk for locating and testing nuclear boiler breach U type pipe as well as method Download PDFInfo
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- CN100594374C CN100594374C CN200810064198A CN200810064198A CN100594374C CN 100594374 C CN100594374 C CN 100594374C CN 200810064198 A CN200810064198 A CN 200810064198A CN 200810064198 A CN200810064198 A CN 200810064198A CN 100594374 C CN100594374 C CN 100594374C
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- type pipe
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- nuclear boiler
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Abstract
The invention provides an enclosed disc and a method used for locating test of nuclear boiler broken U type pipe, which relates to a locating test device and a testing method. The objective of the invention is to solve the problem that the prior efficiency of broken heat exchange U type pipe test is low, or the existing steam generator is needed to be improved, or the leak position is detected byacoustics principle, but the detecting result is not accurate. The surface of the enclosed disc main body of one side set with grid of the enclosed disc provided by the invention is painted with substance layer which changes color when meeting with water and steam. The pressure of the high-pressure water or high-pressure steam according to the invention is 2-15 MPa, the pressure is mantained for 5-20 minutes; the broken heat exchange U type pipe position is confirmed according to the position of the crosspoint with color change. The invention has the advantages of simple structure, convenientinstallation and low cost. The invention is easy, timesaving and fast, the existing steam generator does not need to be improved, which can detect the position of the broken heat exchange U type pipeeffectively and accurately.
Description
Technical field
The present invention relates to a kind of locating and detecting device and detection method.
Background technology
Steam generator is the heat-exchanger rig in the presurized water reactor nuclear power unit, and what flow in its heat exchange U type pipe is High Temperature High Pressure and has radioactive water.Because the tube wall of heat exchange U type pipe is thinner, very easily damaged under the effect of high pressure-temperature water, cause radioactive working medium to leak.Because the quantity of heat exchange U type pipe is more in the steam generator, be not easy to find apace damaged heat exchange U type pipe.The method that extensively adopts is to utilize defectoscope heat exchanging U type pipe to detect by root ground at present, though can detect damaged heat exchange U type pipe like this, the efficient that detects is lower.Patent publication No. is KR20040079256, open day be to disclose a kind of detection method in the Korean patent document on September 14th, 2004, the pipe that warning device is indicated leakage is installed on heat exchange U type pipe.Be FR2690744 in patent publication No., open day be to disclose a kind of method of utilizing Principles of Acoustics to survey the leak position in the French patent document on November 5th, 1993.The former need transform existing steam generator, though the latter's acoustic sounding method is a kind of good methods, but because heat exchange U type pipe is more in the steam generator, the position between the heat exchange U type pipe can form certain influence to the propagation of voice signal, make result of detection inaccurate.
Summary of the invention
The objective of the invention is to detect by root ground, exist detection efficiency lower for solving the existing defectoscope heat exchanging U type pipe that utilizes; The heat exchange U type pipe that warning device is indicated leakage is installed on heat-transfer pipe, need be transformed existing steam generator; Utilize Principles of Acoustics to survey the leak position, but because heat-transfer pipe is more in the steam generator, position between the heat-transfer pipe can form certain influence to the propagation of voice signal, make the inaccurate problem of result of detection, a kind of nuclear boiler the break closed disk and method of U type pipe detection and localization of being used for is provided, the nuclear boiler that is used for of the present invention breaks the closed disk of U type pipe detection and localization by closed disk body 4-1 with meet water or the material layer 4-4 of vapour variable color forms, the plane of closed disk body 4-1 is provided with grid 4-2, scribbles the material layer 4-4 that meets water or vapour variable color on the surface of the closed disk body 4-1 that is provided with grid 4-2 one side.Described closed disk body 4-1 is made by permanent magnetic material or cardboard.The material of the material layer 4-4 of described chance water or vapour variable color is waterless cobaltous chloride or sodium peroxide.Described grid 4-2 is etching, mold pressing or is printed on the lip-deep of closed disk body 4-1.The break position finding and detection method of U type pipe of presurized water reactor nuclear boiler of the present invention is realized by following steps: one, make closed disk 4; At first make closed disk body 4-1 with permanent magnetic material or cardboard, etching on the side surface of closed disk body 4-1, mold pressing or print grid 4-2 then, each point of crossing 4-3 of grid 4-2 is corresponding one by one with the center of heat exchange U type pipe 2 mouths of pipe of detected steam generator 1, is coated with one deck waterless cobaltous chloride or sodium peroxide on the surface of the closed disk body 4-1 that grid 4-2 one side is arranged; Two, between the upper surface of the dividing plate 5 of steam generator 1 and heat exchange U type pipe 2, described closed disk 4 is installed, is made the point of crossing 4-3 of described grid 4-2 corresponding with the position at heat exchange U type pipe 2 centers; Three, the high pressure water injection mouth 3 from steam generator 1 injects water under high pressure or high pressure steam to the inner space 6 of steam generator 1, and the pressure of water under high pressure or high pressure steam is 2～15MPa, keeps this pressure 5～20 minutes; Four, take out closed disk 4, confirm the position of damaged heat exchange U type pipe 2 according to the orientation of the point of crossing 4-3 of variable color.Principle of work is: when the water under high pressure that detects usefulness or high pressure steam when the high pressure water injection mouth 3 of (seeing Fig. 1, Fig. 4) steam generator 1 is squeezed into, form confined space in the steam generator 1; Water under high pressure or high pressure steam penetrate into the inside (as shown in Figure 4) of heat exchange U type pipe 2 by the rent 7 of the heat exchange U type pipe 2 that breaks under the effect of pressure.In the inside of heat exchange U type pipe 2, water (or steam condensate (SC)) is because action of gravity and flowing downward along the inside surface of heat exchange U type pipe 2 drips to the surface of closed disk 4.Owing to scribble copper sulphate (crystal) or waterless cobaltous chloride or sodium peroxide on the surface of closed disk 4 equably, at this moment meet water and promptly react and variable color.Device of the present invention has advantage simple in structure, easy for installation, with low cost.Method of the present invention is easy, save time, fast, needn't transform existing steam generator, can detect the position of damaged heat exchange U type pipe efficiently and accurately, also can utilize water under high pressure that the inside of steam generator is washed simultaneously.
Description of drawings
Fig. 1 is the structural representation of steam generator, and Fig. 2 is used for the break structural representation of closed disk of U type pipe detection and localization of nuclear boiler, and Fig. 3 is the A-A cut-open view of Fig. 2, and Fig. 4 is the enlarged drawing of the single U type pipe in detecting.
Embodiment
Embodiment one: the nuclear boiler that is used for of (referring to Fig. 2, Fig. 3) present embodiment breaks the closed disk of U type pipe detection and localization by closed disk body 4-1 with meet water or the material layer 4-4 of vapour variable color forms, the plane of closed disk body 4-1 is provided with grid 4-2, scribbles the material layer 4-4 that meets water or vapour variable color on the surface of the closed disk body 4-1 that is provided with grid 4-2 one side.Described closed disk body 4-1 is made by permanent magnetic material or cardboard.The material of the material layer 4-4 of described chance water or vapour variable color is copper sulphate, waterless cobaltous chloride or sodium peroxide.The thickness of the material layer 4-4 of described chance water or vapour variable color is 0.01～1mm.Described grid 4-2 is etching, mold pressing or is printed on the lip-deep of closed disk body 4-1.
Embodiment two: the break position finding and detection method of U type pipe of the nuclear boiler of present embodiment is realized by following steps: one, make closed disk 4; At first make closed disk body 4-1 with permanent magnetic material or cardboard, etching on the side surface of closed disk body 4-1, mold pressing or print grid 4-2 then, each point of crossing 4-3 of grid 4-2 is corresponding one by one with the center of heat exchange U type pipe 2 mouths of pipe of detected steam generator 1, is coated with one deck copper sulphate or waterless cobaltous chloride or sodium peroxide on the surface of the closed disk body 4-1 that grid 4-2 one side is arranged; Two, between the upper surface of the dividing plate 5 of steam generator 1 and heat exchange U type pipe 2, described closed disk 4 is installed, is made the point of crossing 4-3 of described grid 4-2 corresponding with the position at heat exchange U type pipe 2 centers; Three, the high pressure water injection mouth 3 from steam generator 1 injects water under high pressure or high pressure steam to the inner space 6 of steam generator 1, and the pressure of water under high pressure or high pressure steam is 2～15MPa, keeps this pressure 5～20 minutes; Four, take out closed disk 4, confirm the position of damaged heat exchange U type pipe 2 according to the orientation of the point of crossing 4-3 of variable color.
Embodiment three: the pressure of present embodiment step 3 mesohigh water or high pressure steam is 6～9MPa.
Embodiment four: the pressure of present embodiment step 3 mesohigh water or high pressure steam is 7.5MPa.
Embodiment five: the pressure 10～15 minutes that keeps water under high pressure or high pressure steam in the present embodiment step 3.
Embodiment six: the pressure 12 minutes that keeps water under high pressure or high pressure steam in the present embodiment step 3.
Claims (9)
1, a kind of break closed disk of U type pipe detection and localization of nuclear boiler that is used for, it is made up of the material layer (4-4) of closed disk body (4-1) and chance water or vapour variable color, it is characterized in that: a plane of closed disk body (4-1) is provided with grid (4-2), scribbles the material layer (4-4) of meeting water or vapour variable color on the surface of the closed disk body (4-1) that is provided with grid (4-2) side; The material of the material layer (4-4) of described chance water or vapour variable color is waterless cobaltous chloride or sodium peroxide.
2, the break closed disk of U type pipe detection and localization of nuclear boiler that is used for according to claim 1, it is characterized in that: described closed disk body (4-1) is made by permanent magnetic material or cardboard.
3, the break closed disk of U type pipe detection and localization of nuclear boiler that is used for according to claim 1, it is characterized in that: the thickness of the material layer (4-4) of described chance water or vapour variable color is 0.01～1mm.
4, the break closed disk of U type pipe detection and localization of nuclear boiler that is used for according to claim 3, it is characterized in that: described grid (4-2) is etching, mold pressing or is printed on the lip-deep of closed disk body (4-1).
5, a kind of closed disk that uses claim 1 carries out the break position finding and detection method of U type pipe of nuclear boiler, it is characterized in that: the break position finding and detection method of U type pipe of nuclear boiler is realized by following steps: one, make closed disk (4); At first make closed disk body (4-1) with permanent magnetic material or cardboard, etching on a side surface of closed disk body (4-1) then, mold pressing or print grid (4-2), each point of crossing (4-3) of grid (4-2) is corresponding one by one with the center of heat exchange U type pipe (2) mouth of pipe of detected steam generator (1), is coated with one deck waterless cobaltous chloride or sodium peroxide on the surface of the closed disk body (4-1) that grid (4-2) side is arranged; Two, between the upper surface of the dividing plate (5) of steam generator (1) and heat exchange U type pipe (2), described closed disk (4) is installed, is made the point of crossing (4-3) of described grid (4-2) corresponding with the position at heat exchange U type pipe (2) center; Three, the high pressure water injection mouth (3) from steam generator (1) injects water under high pressure or high pressure steam to the inner space (6) of steam generator (1), and the pressure of water under high pressure or high pressure steam is 2～15MPa, keeps this pressure 5～20 minutes; Four, take out closed disk (4), confirm the position of damaged heat exchange U type pipe (2) according to the orientation of the point of crossing (4-3) of variable color.
6, the nuclear boiler according to claim 5 position finding and detection method of U type pipe that breaks, it is characterized in that: the pressure of step 3 mesohigh water or high pressure steam is 6～9MPa.
7, the nuclear boiler according to claim 5 position finding and detection method of U type pipe that breaks, it is characterized in that: the pressure of step 3 mesohigh water or high pressure steam is 7.5MPa.
8, the nuclear boiler according to claim 5 position finding and detection method of U type pipe that breaks is characterized in that: the pressure 10～15 minutes that keeps water under high pressure or high pressure steam in the step 3.
9, the nuclear boiler according to claim 5 position finding and detection method of U type pipe that breaks is characterized in that: the pressure 12 minutes that keeps water under high pressure or high pressure steam in the step 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810064198A CN100594374C (en) | 2008-03-28 | 2008-03-28 | Closed disk for locating and testing nuclear boiler breach U type pipe as well as method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810064198A CN100594374C (en) | 2008-03-28 | 2008-03-28 | Closed disk for locating and testing nuclear boiler breach U type pipe as well as method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101256148A CN101256148A (en) | 2008-09-03 |
| CN100594374C true CN100594374C (en) | 2010-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810064198A Expired - Fee Related CN100594374C (en) | 2008-03-28 | 2008-03-28 | Closed disk for locating and testing nuclear boiler breach U type pipe as well as method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102507591B (en) * | 2011-10-27 | 2014-04-16 | 上海交通大学 | Hydraulic early warning method and device for concrete structure |
| DE102014226199A1 (en) * | 2014-12-17 | 2016-06-23 | Siemens Aktiengesellschaft | Method and device for monitoring the state of a system by means of a nanotechnology-based state indicator |
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- 2008-03-28 CN CN200810064198A patent/CN100594374C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 换热管与管板封口焊焊缝密封性试验改进. 石艳.四川化工，第8卷第2期. 2005 |
| 换热管与管板封口焊焊缝密封性试验改进. 石艳.四川化工，第8卷第2期. 2005 * |
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| CN101256148A (en) | 2008-09-03 |
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