CN105300565A - Method for measuring lifting force of magnetic crack detector - Google Patents
Method for measuring lifting force of magnetic crack detector Download PDFInfo
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- CN105300565A CN105300565A CN201410262343.5A CN201410262343A CN105300565A CN 105300565 A CN105300565 A CN 105300565A CN 201410262343 A CN201410262343 A CN 201410262343A CN 105300565 A CN105300565 A CN 105300565A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 239000000725 suspension Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Abstract
本发明涉及磁力探伤技术领域，具体为一种测量磁力探伤仪提升力的测量方法。应用本发明所述方法，不用携带笨重的提升力试块，现场测试方便快捷；应用本发明所述方法，可消除因不同待检测工件的磁导率差异性对提升力测量产生的附加误差。
The invention relates to the technical field of magnetic flaw detection, in particular to a measuring method for measuring the lifting force of a magnetic flaw detector. By applying the method of the present invention, there is no need to carry a bulky lifting force test block, and the on-site test is convenient and quick; by applying the method of the present invention, the additional error caused by the difference in magnetic permeability of different workpieces to be tested on the lifting force measurement can be eliminated.
Description
技术领域technical field
本发明涉及磁力探伤技术领域，具体为一种测量磁力探伤仪提升力的测量方法。The invention relates to the technical field of magnetic flaw detection, in particular to a measuring method for measuring the lifting force of a magnetic flaw detector.
背景技术Background technique
磁力探伤仪的提升力必须大于某一值后，才能保证被检工件的有效磁感应强度，也就是保证检测灵敏度。JB/T4730.4-2005《承压设备无损检测磁粉检测》规定：当使用磁轭最大间距时，交流电磁轭至少应有45N的提升力；直流电磁轭至少应有177N的提升力；交叉磁轭至少应有118N的提升力。当前测量提升力采用的是一定重量的钢铁试块，通过磁轭通电后是否能靠磁力提起试块来验证。但是验证不同电流的磁轭需使用不同的试块，且试块较重，如重量177N的试块质量约18.06KG，通常仅是在实验室使用，如随时带到现场使用则不太方便。使用试块也不能验证磁力探伤仪在工件上工作时的提升力。The lifting force of the magnetic flaw detector must be greater than a certain value in order to ensure the effective magnetic induction of the inspected workpiece, that is, to ensure the detection sensitivity. JB/T4730.4-2005 "Magnetic Particle Testing for Nondestructive Testing of Pressure-bearing Equipment" stipulates that when using the maximum distance between yokes, the AC electromagnetic yoke should have a lifting force of at least 45N; the DC electromagnetic yoke should have a lifting force of at least 177N; The yoke should have a lifting force of at least 118N. At present, a steel test block with a certain weight is used to measure the lifting force, and it can be verified whether the test block can be lifted by magnetic force after the yoke is energized. However, different test blocks are required to verify the yokes of different currents, and the test blocks are heavy. For example, the mass of a test block with a weight of 177N is about 18.06KG. It is usually only used in the laboratory, and it is not convenient to use it on site at any time. The use of test blocks also cannot verify the lifting force of the magnetic flaw detector when working on the workpiece.
发明内容Contents of the invention
(一)要解决的技术问题(1) Technical problems to be solved
为了能随时随地快捷地对磁力探伤仪的提升力进行测量，本发明提供一种磁力探伤仪提升力测试装置，能够方便地测量磁力探伤仪在实际工件上的提升力。In order to quickly measure the lifting force of a magnetic flaw detector anytime and anywhere, the present invention provides a lifting force testing device for a magnetic flaw detector, which can conveniently measure the lifting force of a magnetic flaw detector on an actual workpiece.
(二)技术方案(2) Technical solution
为了解决上述技术问题，本发明提供了一种测量磁力探伤仪提升力的测量方法，所述方法分为如下步骤：In order to solve the above technical problems, the present invention provides a method for measuring the lifting force of a magnetic flaw detector, the method is divided into the following steps:
用连接绳连接磁力探伤仪；Connect the magnetic flaw detector with a connecting rope;
在测力仪下方挂接所述磁力探伤仪，将磁力探伤仪从重心处提起；Mount the magnetic flaw detector below the dynamometer, and lift the magnetic flaw detector from the center of gravity;
手持测力仪，将所述磁力探伤仪置于待测工件上方；Hold the dynamometer and place the magnetic flaw detector above the workpiece to be tested;
将测力仪向上缓慢匀速提起到测量高度，所述测量高度需大于测力仪吊钩向下拉伸最大行程5～10cm；Lift the dynamometer upward slowly and at a constant speed to the measurement height, the measurement height must be greater than the maximum stroke of the dynamometer hook stretching downward by 5-10cm;
记录测力仪读数a；Record the dynamometer reading a;
接通磁力探伤仪电源；Turn on the power of the magnetic flaw detector;
记录测力仪稳定后的读数b；Record the reading b after the dynamometer stabilizes;
读数b与读数a的差值为磁力探伤仪的提升力。The difference between the reading b and the reading a is the lifting force of the magnetic flaw detector.
优选地，所述测力计为机械式弹簧测力计或电子测力计，所述测力计上方均设置有吊环，下方均设置有吊钩。Preferably, the dynamometer is a mechanical spring dynamometer or an electronic dynamometer, and both of the dynamometers are provided with lifting rings above and hooks below.
(三)有益效果(3) Beneficial effects
1、不用携带笨重的提升力试块，现场测试方便快捷。1. There is no need to carry a bulky lifting force test block, and the on-site test is convenient and quick.
2、待检测工件材质不同，相应的磁导率也不相同，上述工件磁导率的差异性会对提升力会产生一定影响。只采用标准试块测试时，由于标准试块的材质是固定的，检测工件与标准试块材质方面的差异会对测量的数据结果增加测量误差。采用本发明所述方法进行测量时可以消除这一误差。2. The material of the workpiece to be tested is different, and the corresponding magnetic permeability is also different. The difference in the magnetic permeability of the above workpiece will have a certain impact on the lifting force. When only the standard test block is used for testing, since the material of the standard test block is fixed, the difference in the material of the detection workpiece and the standard test block will increase the measurement error of the measured data results. This error can be eliminated when measuring with the method of the present invention.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1是根据本发明一种测量磁力探伤仪提升力的测量方法一个实施例的测量过程示意图。Fig. 1 is a schematic diagram of the measurement process of an embodiment of a measurement method for measuring the lifting force of a magnetic flaw detector according to the present invention.
具体实施方式detailed description
下面结合说明书附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例仅用于说明本发明，但不能用来限制本发明的范围。The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are only used to illustrate the present invention, but can not be used to limit the scope of the present invention.
本发明提供一种测量磁力探伤仪提升力的测量方法，分为如下步骤：The invention provides a method for measuring the lifting force of a magnetic flaw detector, which is divided into the following steps:
用连接绳连接磁力探伤仪；Connect the magnetic flaw detector with a connecting rope;
在测力仪下方挂接所述磁力探伤仪，将磁力探伤仪从重心处提起；Mount the magnetic flaw detector below the dynamometer, and lift the magnetic flaw detector from the center of gravity;
手持测力仪，将所述磁力探伤仪置于待测工件上方；Hold the dynamometer and place the magnetic flaw detector above the workpiece to be tested;
将测力仪向上缓慢匀速提起到测量高度，所述测量高度需大于测力仪吊钩向下拉伸最大行程5～10cm；Lift the dynamometer upward slowly and at a constant speed to the measurement height, the measurement height must be greater than the maximum stroke of the dynamometer hook stretching downward by 5-10cm;
记录测力仪读数a；Record the dynamometer reading a;
接通磁力探伤仪电源；Turn on the power of the magnetic flaw detector;
记录测力仪稳定后的读数b；Record the reading b after the dynamometer stabilizes;
读数b与读数a的差值为磁力探伤仪的提升力。The difference between the reading b and the reading a is the lifting force of the magnetic flaw detector.
本发明采用的测量方法中所使用的测力计为机械式弹簧测力计或电子测力计。所述测力计上方均具有吊环，下方均设置有吊钩。The dynamometer used in the measurement method adopted by the present invention is a mechanical spring dynamometer or an electronic dynamometer. There are suspension rings above the dynamometer, and suspension hooks below.
图1所示为本发明采用机械式弹簧测力计4测量时的工作示意图。磁力探伤仪2位于工件1上方；连接线3与磁力探伤仪2形成稳固连接；机械式弹簧测力计4下方挂钩挂在连接线3上；机械式弹簧测力计4上方由测量人手持；将磁力探伤仪2匀速缓慢提升，待吊离工件1超过所述机械式弹簧测力计4下拉伸最大行程5～10cm后停止；待测力计度数稳定后记录度数并接通磁力探伤仪2的电源；待测力计度数进一步稳定后记录读数，完成测量。Fig. 1 shows the working diagram when the present invention adopts mechanical spring dynamometer 4 to measure. The magnetic flaw detector 2 is located above the workpiece 1; the connecting wire 3 forms a stable connection with the magnetic flaw detector 2; the hook below the mechanical spring dynamometer 4 is hung on the connecting wire 3; the upper part of the mechanical spring dynamometer 4 is held by the measuring person; Lift the magnetic flaw detector 2 slowly at a constant speed, and stop after the workpiece 1 is lifted away from the workpiece 1 and exceeds the maximum stroke of 5-10cm under the mechanical spring dynamometer 4; after the dynamometer reading is stable, record the reading and turn on the magnetic flaw detector 2 power supply; after the dynamometer to be measured is further stabilized, record the reading and complete the measurement.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变型，这些改进和变型也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.
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| CN201410262343.5A CN105300565B (en) | 2014-06-12 | 2014-06-12 | A kind of measurement method of magnetic crack detector lifting force |
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Cited By (3)
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| CN111551302A (en) * | 2020-06-12 | 2020-08-18 | 智慧计量检测(海南)有限公司 | Lifting force testing method for magnet yoke type flaw detector |
| CN111579137A (en) * | 2020-06-19 | 2020-08-25 | 河南省计量科学研究院 | A method and device for measuring the lifting force of a yoke-type magnetic particle flaw detector |
| CN116297818A (en) * | 2023-05-17 | 2023-06-23 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551302A (en) * | 2020-06-12 | 2020-08-18 | 智慧计量检测(海南)有限公司 | Lifting force testing method for magnet yoke type flaw detector |
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| CN116297818A (en) * | 2023-05-17 | 2023-06-23 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
| CN116297818B (en) * | 2023-05-17 | 2023-08-04 | 中国核工业二四建设有限公司 | Nondestructive testing method for steel lining wallboard |
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