CN104090027A - Device for automatically detecting fillet weld of heat exchanger tube plate through ultrasonic wave - Google Patents
Device for automatically detecting fillet weld of heat exchanger tube plate through ultrasonic wave Download PDFInfo
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- CN104090027A CN104090027A CN201410333067.7A CN201410333067A CN104090027A CN 104090027 A CN104090027 A CN 104090027A CN 201410333067 A CN201410333067 A CN 201410333067A CN 104090027 A CN104090027 A CN 104090027A
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Abstract
The invention relates to a device for automatically detecting a fillet weld of a heat exchanger tube plate through ultrasonic waves and aims at providing a device which is capable of achieving the longitudinal and circumferential automatic detection on the fillet weld of the heat exchanger tube plate; a detection method is simple and the detection result is reliable. According to the technical scheme, the device for automatically detecting the fillet weld of the heat exchanger tube plate through the ultrasonic waves comprises a mechanical scanning device, a probe arranged on the mechanical scanning device, a detector electrically connected with the probe, and a controller 8 for controlling the device. The device is characterized in that the mechanical scanning device comprises a tubular box body, a sensor bracket shaft rotatably located on the box body through a bearing, and a stepping motor for driving the sensor bracket shaft; the probe is a phased array probe; the detector is an ultrasonic phased array detector.
Description
Technical field
The present invention relates to a kind of heat exchanger tube sheet fillet weld ultrasound wave automatic detection device, specifically the pick-up unit of the circumferential machine automatization scanning of the longitudinal phased array electronic line scanning of heat exchanger tube sheet fillet weld.
Background technology
Between the heat exchanger tube of heat interchanger and tube sheet, adopt welding or expanded joint to add the form of welding, the quality of welding joint directly affects the product quality of heat interchanger, especially the quality of the fillet weld in large-scale petrochemical equipment high temperature, high voltage type heat interchanger used.Because this heat interchanger has thousands of heat exchanger tubes, the diameter of heat exchanger tube is often less and arrange compactness, and therefore very high for the welding requirements of welded corner joint, the quality of these fillet welds has determined the security performance of whole heat interchanger.But, the domestic detection for heat interchanger fillet weld is at present mainly to utilize water, gas etc. to carry out leak detection, the defect such as slag inclusion, pore that cannot butt welded seam inside detects, and the inherent vice of fillet weld can easily cause device to reveal in the situations such as high temperature, high pressure, deep-etching, have an accident.So, in the manufacture process of heat interchanger and while operation, need to test to fillet weld, be exactly one of most important checking procedure to the Non-Destructive Testing of fillet weld.
The Non-Destructive Testing of heat exchanger tube-tube sheetbrace angle weld seam mainly contains ray detection, Ultrasonic Detection, magnetic detects and infiltration detects.But magnetic detects and infiltration detection cannot detect weld seam inherent vice, and conventional ray detection sensitivity is lower.That ultrasonic inspection has is easy to operate, resolution is high, cost is low, adapt to the advantages such as wide, particularly strong to this type of special construction applicability of fillet weld, has the irreplaceable feature of other nondestructive detecting instrument.At present domestic part Study mechanism adopts twin crystal focusing probe, and (inside is made up of two single probes, one for transmitting, one for receiving signal) heat exchanger tube sheetbrace angle weld seam carries out Ultrasonic Detection, in conjunction with ultrasonic detecting technology, computer technology, mechanical transmissioning technology, make to detect robotization, Enhanced Capability of Graphic Display And Automatic Judgment, detection speed and precision are obviously improved, as the Xie Zhijiang of University Of Chongqing, Fang Zhenyun has developed pipe-pipe sheet fillet weld auto-ultrasonic detection system, this system adopts computer control scanning mechanical arm scanning pipe-tube sheetbrace angle weld seam and gathers corresponding ultrasound echo signal, after certain processing, show and printing curve result, system hardware mainly comprises mechanical scanner, interface circuit, multifunctional data acquisition card and notebook, in order to detect the defect of weld seam inside, use miniature twin crystal focusing probe to stretch into tube wall and transmit and receive ultrasound wave, judge weld seam internal soundness according to echo character.Heat exchanger tube-tube sheetbrace angle weld joint ultrasonic that Holland Si Tai meter Ka Bang company has developed detects complete sets of instrument automatically, its technical thought is to adopt miniature twin lamella focusing probe, stretch into and do 360 ° of circumferential scanning inspections in the mouth of pipe to fillet weld district, the organic glass delay block of detecting head surface is convex, to meet the testing requirement of different curvature heat exchanger tube.But the twin crystal focusing probe that above-mentioned several Ultrasonic Detection automatic detection device all adopts detects, and detection efficiency is obviously on the low side.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned background technology, a kind of heat exchanger tube sheet fillet weld ultrasound wave automatic detection device is proposed, this device should be realized heat exchanger tube sheet fillet weld and longitudinally and circumferentially automatically detect, and detection method is easy, testing result is reliable.
Technical scheme provided by the invention is: a kind of heat exchanger tube sheet fillet weld ultrasound wave automatic detection device, comprises mechanical scanning device, is arranged on the probe on mechanical scanning device, the detector being electrically connected with probe and the controller 8 that said apparatus is controlled; It is characterized in that described mechanical scanning device comprises the casing of tubulose, is rotatably positioned sensor stand axle on casing and the stepper motor of driving sensor support shaft by bearing; Described probe is phased array probe; Described detector is ultrasonic phase array detector.
After described sensor stand axle overhangs toward front from housing, its front end is rotatably positioned one for inserting axle in the pipe of tested pipeline by bearing again; The middle part of sensor stand axle is shaped with the mounting groove radially connecting, and described probe is fixed in aforementioned mounting groove and is exposed to casing outside; This probe also conducts by data line and outside ultrasonic phase array detector.
On described housing, also make an inlet opening for water flowing, this inlet opening communicates with aforementioned mounting groove by the inner chamber of housing.
Principle of work of the present invention is:
Longitudinally adopt electronic linear scan technology, circumferentially adopt mechanical scanning technology, until complete the detection of whole fillet weld.When scanning, make spacescan by the path of having planned, by signal controlling and disposal system control and processing positional information and ultrasound information, detect C scanning real time imagery thereby realize.
The invention has the beneficial effects as follows: owing to adopting ultrahigh frequency, microwafer ultrasonic phased array technology, in conjunction with computing machine and mechanical transmission mechanism, circumferentially adopt stepper motor to realize circumferential 360 degree scannings, axially adopt electronic linear scan (replacing conventional mechanical scanning mode); Replace conventional twin crystal focusing probe by phased array probe, accuracy of detection and detecting reliability are obviously improved, detection speed and detection efficiency significantly improve.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram that hot organ pipe plate fillet weld detects automatic scanning device.
Fig. 2 is the main TV structure schematic diagram of the mechanical scanning device in device described in Fig. 1.
Fig. 3 is the plan structure schematic diagram of the mechanical scanning device in device described in Fig. 1.
Fig. 4 is the working state schematic representation installing described in Fig. 1.
Fig. 5 is the A portion structure for amplifying schematic diagram in Fig. 4.
Embodiment
Further illustrate below in conjunction with embodiment shown in the drawings.
Between the heat exchanger tube 4 of heat interchanger and tube sheet 1, conventionally adopt Type of Welding to be connected, form fillet weld 2 (as Fig. 4).The key that heat exchanger tube sheetbrace angle weld seam carries out Ultrasonic Detection is that probe must stretch into detection in pipe; In view of heat exchanger tube diameter less, so adopt ultrahigh frequency (10-15MHz), microwafer phased array techniques, stretch into the inherent fillet weld of mouth of pipe district and do 360 ° of circumferential scanning inspections, control and regulate and detect focal length, make it effectively to detect the defect of different depth position.
Automatic scanning device provided by the invention is made up of ultrasonic phase array detector 5, controller 8, mechanical scanning device 12, phased array probe 3, AC/DC adapter switch 6 is communicated with power supply ultrasonic phase array detector is powered, ultrasonic phase array detector connects phased array probe and scrambler by data-interface 7, thereby controls hyperacoustic transmitting and receiving and the input of detection position.Longitudinally (axial) scanning adopts electric wire to sweep, and realizes by linear array phased array probe.Circumferentially scanning adopts physical construction, control the motion of special-purpose machinery scanning equipment 12 by controller 8, the control panel 11 of controller realize scanning equipment startup, stop, anxious stopping, the function such as revolution, power switch 9 is communicated with power supply mechanical scanning device is powered.Step motor control switch 10 is controlled circumferential stepper motor.Linear array phased array probe 3 is contained in mechanical scanning device.Ultrasonic phase array detector is processed electronic linear scan, the circumferentially positional information of mechanical scanning and the ultrasonic signal that phased array probe receives, on its display, form the scan images such as real-time B, C, 3D, and data storing in inner or outside storer.
Mechanical scanning device 12 structures as shown in Figure 3; Mainly comprise axle 15, stepper motor support 16, bearing (ball) cover 17, casing 18, stepper motor 19 etc. in sensor stand axle 13, data line 14, pipe.Principle of work is:
Phased array probe 3 is arranged in the mounting groove on sensor stand axle 13 and by sunk screw and is fixed, and data line 14 sees through stepper motor support side gap and lays out; Phased array probe center overlaps with spindle central, and wafer part is just exposed propagates ultrasound wave smoothly.
Sensor stand axle 13 is installed in casing 18 by large bearing 21, and on pipe inner support axle, 15 (for closed frame tubes, so that the water storage of scanning position) are installed to the front end of sensor stand axle by little bearing 20; On casing, also make an inlet opening 22 for water flowing, this inlet opening communicates with aforementioned mounting groove by the inner chamber of casing.
Stepper motor support 16 is fixed on the rear end (showing it is right-hand member in figure) of casing.Stepper motor 19 is connected on stepper motor support, and sensor stand axle is connected on stepper motor front axle by shaft coupling, and scrambler (omitting in figure) is connected on stepper motor rear axle by shaft coupling.
Principle of work is:
1) front end of sensor stand axle is inserted in heat exchanger tube (make pipe inner support axle shutoff is unlikely forwardly leak), casing front end is near pipe end face (also herein shutoff make it unlikely leak), then toward injected water in the water injection hole 22 on casing, make probe be full of water (conventional water logging coupling technique) around, convenience for ultrasonic ripple is propagated.
2) start power switch, forward-reverse switch, speed by-pass cock (low speed is 5m/r, is 20m/r at a high speed).Stepper motor drives probe and the sensor stand axle real time record ultrasonic signal that rotates in a circumferential direction, and is connected and records phase information simultaneously by shaft coupling with scrambler.Finally, the signal collecting is transferred to ultrasonic phase array detector, form C scan image and show.
3) after circumferentially scanning one circle finishes, the switch of cutting off the electricity supply, more counter turning around, prevent that probe data line card firmly.
4) by controller 8 (outsourcing piece), mechanical scanning device is powered and swept.Control step motor is realized circumferential scanning after driving, and records circumferential scanning positional information by the scrambler on stepper motor rear axle.When stirring the left side " switch " when opening, the uniform rotation of control step motor; The switch on the right, for adjusting rotary speed, can divide " at a high speed " and " low speed " two kinds.Centre is motor positive and inverse switch, and its effect is to remove by controlling motor positive and inverse operation the probe data line being wrapped on sensor stand axle.In the time that switch stops, stepper motor stops operating.Therefore, this system has detected a fillet weld only needs the time of approximately 30 seconds, and detection efficiency increases substantially.
Claims (3)
1. a heat exchanger tube sheet fillet weld ultrasound wave automatic detection device, comprises mechanical scanning device (12), is arranged on the probe (3) on mechanical scanning device, the detector (5) being electrically connected with probe and the controller (8) that said apparatus is controlled; It is characterized in that described mechanical scanning device comprises the casing of tubulose (18), is rotatably positioned sensor stand axle (13) on casing and the stepper motor (19) of driving sensor support shaft by bearing; Described probe is phased array probe; Described detector is ultrasonic phase array detector.
2. heat exchanger tube sheet fillet weld ultrasound wave automatic detection device according to claim 1, is characterized in that: after described sensor stand axle overhangs toward front from housing, its front end is rotatably positioned one for inserting axle (15) in the pipe of tested pipeline by bearing again; The middle part of sensor stand axle is shaped with the mounting groove radially connecting, and described probe is fixed in aforementioned mounting groove and is exposed to casing outside; This probe also conducts by data line (14) and outside ultrasonic phase array detector.
3. heat exchanger tube sheet fillet weld ultrasound wave automatic detection device according to claim 3, is characterized in that: on described housing, also make an inlet opening for water flowing (22), this inlet opening communicates with aforementioned mounting groove by the inner chamber of housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410333067.7A CN104090027A (en) | 2014-07-14 | 2014-07-14 | Device for automatically detecting fillet weld of heat exchanger tube plate through ultrasonic wave |
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| CN201410333067.7A CN104090027A (en) | 2014-07-14 | 2014-07-14 | Device for automatically detecting fillet weld of heat exchanger tube plate through ultrasonic wave |
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| CN104090027A true CN104090027A (en) | 2014-10-08 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764807A (en) * | 2015-03-23 | 2015-07-08 | 国家电网公司 | A weld-seam ultrasonic wave automatic detection system for in-service steel pipe towers of power transmission |
| CN106323996A (en) * | 2015-07-01 | 2017-01-11 | 中核武汉核电运行技术股份有限公司 | Automatic heat exchanger pipe end fillet weld inspection system |
| CN106970150A (en) * | 2017-04-14 | 2017-07-21 | 中国科学院声学研究所 | A kind of fixed absorption type scanner device and method of adjustment |
| CN108845027A (en) * | 2018-03-15 | 2018-11-20 | 宁波市特种设备检验研究院 | A kind of scanning equipment for the detection of plug-in type Nozzle weld |
| CN110044920A (en) * | 2019-04-26 | 2019-07-23 | 中国科学院自动化研究所 | Wire-shaped workpieces solder joint weld quality prediction system and method |
| CN111189861A (en) * | 2020-03-05 | 2020-05-22 | 中国特种设备检测研究院 | Automatic detection method and device for tube and tube plate radiographic digital imaging based on robot |
| CN113138227A (en) * | 2021-04-14 | 2021-07-20 | 西安热工研究院有限公司 | Welding joint combination detection method in high-temperature state |
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| CN204044113U (en) * | 2014-07-14 | 2014-12-24 | 浙江省特种设备检验研究院 | A kind of heat exchanger tube sheet fillet weld ultrasound wave automatic detection device |
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2014
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204044113U (en) * | 2014-07-14 | 2014-12-24 | 浙江省特种设备检验研究院 | A kind of heat exchanger tube sheet fillet weld ultrasound wave automatic detection device |
Non-Patent Citations (1)
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| 钱盛杰: "换热器管板角焊缝相控阵列超声检测技术研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764807A (en) * | 2015-03-23 | 2015-07-08 | 国家电网公司 | A weld-seam ultrasonic wave automatic detection system for in-service steel pipe towers of power transmission |
| CN104764807B (en) * | 2015-03-23 | 2017-03-29 | 国家电网公司 | In-service transmission of electricity steel pipe tower weld joint ultrasonic automated detection system |
| CN106323996A (en) * | 2015-07-01 | 2017-01-11 | 中核武汉核电运行技术股份有限公司 | Automatic heat exchanger pipe end fillet weld inspection system |
| CN106323996B (en) * | 2015-07-01 | 2023-10-20 | 中核武汉核电运行技术股份有限公司 | Full-automatic heat exchanger pipe end fillet weld inspection system |
| CN106970150A (en) * | 2017-04-14 | 2017-07-21 | 中国科学院声学研究所 | A kind of fixed absorption type scanner device and method of adjustment |
| CN106970150B (en) * | 2017-04-14 | 2023-05-02 | 中国科学院声学研究所 | Fixed adsorption type scanner device and adjusting method |
| CN108845027A (en) * | 2018-03-15 | 2018-11-20 | 宁波市特种设备检验研究院 | A kind of scanning equipment for the detection of plug-in type Nozzle weld |
| CN110044920A (en) * | 2019-04-26 | 2019-07-23 | 中国科学院自动化研究所 | Wire-shaped workpieces solder joint weld quality prediction system and method |
| CN111189861A (en) * | 2020-03-05 | 2020-05-22 | 中国特种设备检测研究院 | Automatic detection method and device for tube and tube plate radiographic digital imaging based on robot |
| CN113138227A (en) * | 2021-04-14 | 2021-07-20 | 西安热工研究院有限公司 | Welding joint combination detection method in high-temperature state |
| WO2022217813A1 (en) * | 2021-04-14 | 2022-10-20 | 西安热工研究院有限公司 | Method for combined inspection of welded joints under high temperatures |
| CN113138227B (en) * | 2021-04-14 | 2024-03-08 | 西安热工研究院有限公司 | Welding joint combination detection method in high-temperature state |
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Application publication date: 20141008 |