CN102901769B - Probe for detecting ferromagnetic substance deposition in heated surface pipe of boiler - Google Patents
Probe for detecting ferromagnetic substance deposition in heated surface pipe of boiler Download PDFInfo
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- CN102901769B CN102901769B CN201210449544.7A CN201210449544A CN102901769B CN 102901769 B CN102901769 B CN 102901769B CN 201210449544 A CN201210449544 A CN 201210449544A CN 102901769 B CN102901769 B CN 102901769B
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Abstract
The invention discloses a probe for detecting ferromagnetic substance deposition in a heated surface pipe of a boiler. The probe comprises a shell, a U-shaped magnet packaged in the shell, and a detection coil provided with a plurality of wire turns; the lower part of the detection coil is arranged in the U-shaped magnet; a leading-out conducting wire arranged on the detection coil is connected with an external measurement signal processing device; and the upper part of the detection coil has an opening and closing structure using a plug-in connector. By using the electromagnetic induction principle, the U-shaped magnet provides a stable constant magnetic field; and by using the characteristic that the detection coil can sense the intensity of electromagnetic induction detecting signals, the deposition/accumulation quantity of scale cinder or ferromagnetic substances in the heated surface pipe of the boiler in service is accurately measured. The deposition/accumulation quantity of the scale cinder or the ferromagnetic substances in the heated surface pipe of the boiler in service can be non-destructively detected by using the probe without special treatment; and the designed probe has the characteristics of small size, convenience in connection, simplicity in operation, safety, reliability, high sensitivity, quickness and the like.
Description
Technical field
The invention belongs to technical field of nondestructive testing, relate to a kind of probe that detects ferromagnetism thing deposition in heating surface tubes in boilers.Be applicable to the detection to the ferromagnetism such as oxide skin, the iron filings thing deposition/accumulating amount in the heating surface tube of large-sized boiler.
Background technology
Newly-built station boiler, in process of construction, because the ferromagnetism things such as the iron filings that produce in manufacture, installation, trial run process, lens, oxide are easily retained in heating surface tube, forms obstruction in pipe in throttle orifice and bend pipe; In-service boiler tubes of power plant in use also there will be serious steam side oxide skin to peel off conventionally; the oxide skin of peeling off also easily forms and stops up in throttle orifice or bend pipe in boiler tube; thereby the boiler tube temperature of stopping up sharply rises and causes overheated booster, has a strong impact on the safe and stable operation of boiler.In order to prevent the generation of pipe explosion accident, very necessary to the detection of ferromagnetism thing deposition/accumulating amount in boiler tube.And the measurement of at present the ferromagnetism thing depositions such as oxide skin, iron filings in throttle orifice in boiler tube or bend pipe being stopped up generally adopts ray detection, owing to being subject to the restriction of site space, implement the method difficulty larger and easily undetected, and because ray is larger to the harm of human body, affect carrying out smoothly of other service works.
Summary of the invention
Technical matters to be solved by this invention is, a kind of easy to use, safe, probe of detecting ferromagnetism thing deposition in effective detection heating surface tubes in boilers is provided.
Technical solution of the present invention is: the probe that detects ferromagnetism thing deposition in heating surface tubes in boilers comprises U-shaped magnet in the enclosure of shell, encapsulation, establishes the magnetic test coil of some astragal circles, the lower part of magnetic test coil is positioned at U-shaped magnet, magnetic test coil is provided with draws wire and is connected with externally measured signal processing apparatus, and the upper part of magnetic test coil adopts the retractable structure of optic pin-and-socket connector.
Described connector, comprise the plug of establishing some contact pins and the socket of establishing some intubate, plug coordinates by the intubate of contact pin and socket, contact pin is connected with the two ends that wire turn on magnetic test coil disconnects respectively with intubate, and magnetic test coil can be disconnected and be formed opening and an overall tubular coil of closed formation by connector.
The invention has the beneficial effects as follows, the present invention utilizes electromagnetic induction principle, provide steady magnetic field by U-shaped permanent magnet, utilize the characteristic of the electromagnetic induction detection signal power that magnetic test coil can experience, heating surface tubes in boilers inner oxide or ferromagnetism thing deposition/accumulating amount are carried out to Non-Destructive Testing, according to detection signal power to oxide skin, the ferromagnetism thing amounts such as iron filings are determined, use the present invention while detecting without pipeline outer wall is carried out to special processing, can be to deposition/accumulation oxide skin in heating surface tubes in boilers, the ferromagnetism things such as iron filings carry out Non-Destructive Testing, it is little that the probe of design has size, easy to connect, simple to operate, safety, reliably, highly sensitive, the feature such as quick, therefore loose to the environmental requirement detecting, and convenient and swift, especially emptying of narrow and small pipe can both effectively be detected and be put in place, thereby improve significantly detection efficiency.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is cross-sectional view of the present invention.
Fig. 3 is the structural representation of magnetic test coil connector in the present invention.
Embodiment
As shown in Figure 1 and Figure 2, the present invention probe comprises shell 1, be encapsulated in U-shaped magnet 2 in shell 1, establish the magnetic test coil 3 of some astragal circles 31, the lower part of magnetic test coil 3 is positioned at U-shaped magnet 2, magnetic test coil 3 is provided with draws wire 6 and is connected with externally measured signal processing apparatus, and the upper part of magnetic test coil 3 adopts the retractable structure of optic pin-and-socket connector 7; Described connector as shown in Figure 3, comprise and establish the plug 71 of some contact pins 711 and establish the socket 72 of some intubate 721, plug 71 coordinates by the intubate 721 of contact pin 711 and socket 72, contact pin 711 is connected with the two ends that wire turn 31 on magnetic test coil 3 disconnects respectively with intubate 721, and magnetic test coil 3 can be disconnected and be formed opening and an overall tubular coil of closed formation by connector.
Time of the present invention, probe is placed on heating surface tubes in boilers 4, first the connector 7 on probe magnetic test coil 3 is opened, plug 71 and socket 72 that magnetic test coil 3 is surrounded to heating surface tubes in boilers 4 and closes in connector 7, make magnetic test coil 3 form an overall tubular coil around heating surface tubes in boilers 4, if have oxide skin in heating surface tubes in boilers 4, the ferromagnetism things 5 such as iron filings, oxide skin, the ferromagnetism things 5 such as iron filings are magnetized by U-shaped magnet 2, by the magnetic induction density after magnetic test coil 3 detection of magnetized, and draw by drawing wire 6, carry out signal acceptance by external signal processing apparatus, amplify and process and show, reach testing goal.
While using the present invention to detect, probe is close on heating surface tubes in boilers 4 walls to be measured and is slided, in the time that probe slides into the ferromagnetism such as oxide skin, the iron filings thing 5 of heating surface tubes in boilers 4 interior existence, detection signal just can grow, according to the power of detection signal, just can measure the ferromagnetism such as oxide skin, iron filings thing 5 deposit/accumulation degree, just can determine that next step need to clear up measure.
Claims (2)
1. one kind is detected the probe of ferromagnetism thing deposition in heating surface tubes in boilers, it is characterized in that: comprise establish circular groove shell, U-shaped magnet in the enclosure of encapsulation, establish the magnetic test coil of some astragal circles, described magnetic test coil is divided into upper and lower two parts, the lower part of magnetic test coil is positioned at U-shaped magnet, magnetic test coil is provided with draws wire and is connected with externally measured signal processing apparatus, the upper part of magnetic test coil adopts the retractable structure of optic pin-and-socket connector, and magnetic test coil can be disconnected and be formed opening and an overall tubular coil of closed formation by connector; By the folding of connector, make magnetic test coil form an overall tubular coil around heating surface tubes in boilers, when probe is close to and slides on boiler heating surface tube wall, detect the magnetic induction density after by U-shaped magnet magnetization of ferromagnetism thing in heating surface tubes in boilers by magnetic test coil, and show by externally measured signal processing apparatus.
2. the probe of ferromagnetism thing deposition in detection heating surface tubes in boilers according to claim 1, it is characterized in that: described connector, comprise the plug of establishing some contact pins and the socket of establishing some intubate, plug coordinates by the intubate of contact pin and socket, and contact pin is connected with the two ends that wire turn on magnetic test coil disconnects respectively with intubate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210449544.7A CN102901769B (en) | 2012-11-12 | 2012-11-12 | Probe for detecting ferromagnetic substance deposition in heated surface pipe of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210449544.7A CN102901769B (en) | 2012-11-12 | 2012-11-12 | Probe for detecting ferromagnetic substance deposition in heated surface pipe of boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102901769A CN102901769A (en) | 2013-01-30 |
| CN102901769B true CN102901769B (en) | 2014-07-09 |
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| CN201210449544.7A Active CN102901769B (en) | 2012-11-12 | 2012-11-12 | Probe for detecting ferromagnetic substance deposition in heated surface pipe of boiler |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439401A (en) * | 2013-08-15 | 2013-12-11 | 湖南省湘电锅炉压力容器检验中心有限公司 | Device for detecting deposition amount of ferromagnetic matter in austenite stainless steel bent tube for boiler |
| CN106950603A (en) * | 2017-03-22 | 2017-07-14 | 梁峰 | The probe that ferromagnetism thing is deposited in a kind of detection heating surface tubes in boilers |
| CN112858464B (en) * | 2021-01-14 | 2023-06-06 | 长沙湘计海盾科技有限公司 | Magnetic metal particle detection sensor and system |
| CN114643537A (en) * | 2022-03-14 | 2022-06-21 | 长沙矿冶研究院有限责任公司 | Automatic sand inspection device and method for sand supply tank of high-pressure water jet cleaning equipment |
| CN114923131B (en) * | 2022-05-18 | 2024-01-26 | 昆明理工大学 | Method and device for detecting pipeline siltation |
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| US3938037A (en) * | 1974-10-29 | 1976-02-10 | The United States Of America As Represented By The United States National Aeronautics And Space Administration | Device for measuring the ferrite content in an austenitic stainless steel weld material |
| CN2641777Y (en) * | 2003-09-12 | 2004-09-15 | 北京磁通设备制造有限公司 | Open/close type electromagnetic winding |
| JP3765188B2 (en) * | 1998-07-28 | 2006-04-12 | 住友化学株式会社 | Carburization measurement method |
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| US3938037A (en) * | 1974-10-29 | 1976-02-10 | The United States Of America As Represented By The United States National Aeronautics And Space Administration | Device for measuring the ferrite content in an austenitic stainless steel weld material |
| JP3765188B2 (en) * | 1998-07-28 | 2006-04-12 | 住友化学株式会社 | Carburization measurement method |
| CN2641777Y (en) * | 2003-09-12 | 2004-09-15 | 北京磁通设备制造有限公司 | Open/close type electromagnetic winding |
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| CN102901769A (en) | 2013-01-30 |
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