Eddy current high/low-frequency compound detection equipment for seamless steel tubes
A composite detection and seamless steel pipe technology, which is applied in the direction of measuring devices, instruments, and material analysis through electromagnetic means, can solve the problems of difficult identification and detection sensitivity, reduce the risk of missed detection, improve the detection effect and The effect of work efficiency
Inactive Publication Date: 2015-06-03
沈玉琴
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] The main material for the production of bearings is seamless steel tubes. The current testing technology for the surface quality of seamless steel tubes is to use through-type eddy current flaw detection equipment. The eddy current magnetic field will be generated on the surface. When the steel pipe is found to be defective, the eddy current magnetic field will change, resulting in a change in the impedance or induced voltage of the detection coil (probe). Judgment, confirm whether there are defects and the size of the defects, but when the direction of the defects on the seamless steel pipe is parallel to the direction of the eddy current, the detection sensitivity is difficult to find the defects, and it is not sensitive to the discontinuous defects on the inner surface, especially when the wall thickness is It is more difficult to identify defects on the inner surface of steel pipes above 4.0mm
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] Combine below figure 2 with One Examples further illustrate the present invention:
[0027] A seamless steel pipe eddy current high and low frequency composite detection equipment, including an electric control system, front and rear roller tables, positioning and pressing wheel devices, three-roller centering devices, lifting devices, magnetization devices, flaw detection instruments, demagnetizers and blanking racks.
[0028] The electric control system is installed in a separate electrical cabinet, which controls the transmission of steel pipes of the flaw detection equipment, realizes the automatic loading and unloading of steel pipes, sorting, defect signal alarm, and enables the equipment to complete automatic flaw detection, and is equipped with manual and automatic control;
[0029] The main electrical components of the electronic control system include a frequency converter and a programmable controller, and a filter combination is used for anti-interference measure...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses eddy current high / low-frequency compound detection equipment for seamless steel tubes. The equipment comprises an electric control system, front and rear roller paths, a positioning pressure wheel device, a three-roller centering device, a lifting device, magnetizing devices, a flaw detection instrument, a demagnetizer, a stand and a blanking frame. The steel tubes to be detected stably enter into the pressure wheel device, the three-roller centering device and the two magnetizing devices through the transmission roller paths controlled by the electric control system for finishing full coverage detection of the steel tubes; the flaw detection instrument is used for displaying detection results; and the steel tubes enter into the demagnetizer and the stand for demagnetizing the steel tubes, finally enter into the blanking frame and are automatically separated and stored in qualified and unqualified product storage tanks. The equipment has the beneficial effects that each magnetizing device is equipped with a high-frequency probe and a low-frequency probe for on-line detection, so that the detection effect and the working efficiency are improved and the missing detection risk is lowered.
Description
Technical field [0001] The invention relates to a flaw detection equipment for seamless steel pipes, in particular to a flaw detection equipment using eddy current technology. Background technique [0002] The main material for the production of bearings is seamless steel pipes. The surface quality inspection technology of seamless steel pipes currently uses through-type eddy current flaw detection equipment. The principle is to pass the steel pipe through a coil (probe) with alternating current, and place it on the surface of the steel pipe. An eddy current magnetic field will be generated on the surface. When the steel pipe is found to be defective, the eddy current magnetic field will change, causing the impedance or induced voltage of the detection coil (probe) to change. This change is processed by the instrument to send out information, and then the equivalent comparison method is used. Determine whether there are defects and the size of the defects, but when the direction ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/90G01N27/9013
Inventor 沈玉琴
Owner 沈玉琴