CN111965250A - In-service rail weld joint high-temperature detection method and detection device thereof - Google Patents
In-service rail weld joint high-temperature detection method and detection device thereof Download PDFInfo
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- CN111965250A CN111965250A CN202010892099.6A CN202010892099A CN111965250A CN 111965250 A CN111965250 A CN 111965250A CN 202010892099 A CN202010892099 A CN 202010892099A CN 111965250 A CN111965250 A CN 111965250A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9006—Details, e.g. in the structure or functioning of sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/228—Details, e.g. general constructional or apparatus details related to high temperature conditions
Abstract
The invention discloses a high-temperature detection method and a detection device for in-service rail weld joints, which are used for nondestructive detection of high-temperature weld joints (41) of in-service railway steel rails (4), are connected with an analysis display instrument (3) by leads (2), and the detection device (1) comprises a high-temperature-resistant shell (11) and a detection probe (12), and is characterized in that the detection device (1) also comprises a device for flowing gas or liquid refrigerant for cooling a detection sensor arranged on the detection probe (12). The invention adopts a method of internally circulating and cooling the detection probe, and the flowing refrigerant (gas or liquid) is designed between the probe and the cavity of the outer sleeve so as to reduce the temperature of the probe, realize that the detector can carry out effective quality detection on the welding seam of the steel rail when the welding seam of the steel rail is at a higher temperature, and solve the detection problem puzzling the railway industry under the condition of high temperature of the welding seam of the in-service track.
Description
Technical Field
The invention relates to the technical field of electromagnetic nondestructive testing, in particular to nondestructive testing of a railway track weld joint, and particularly relates to an in-service track weld joint high-temperature testing method and a testing device thereof.
Background
At present, the special rails for high-speed rails are seamless long rails, in daily maintenance, due to the fact that cold contraction and thermal expansion caused by cold in winter and hot in summer and other reasons, rapid cutting and welding treatment needs to be carried out on steel rails, due to the fact that most welding modes need a high-temperature hot melting method, construction is carried out at limited skylight points at night, time cannot be provided for enabling a vehicle to be started after steel rail welding seams are cooled to normal temperature and then subjected to nondestructive testing, the steel rail welding seams cannot be cooled rapidly by water and the like, and the steel rail welding seams generally need to be cooled naturally so as to avoid influencing the quality of the. Therefore, the quality of the steel rail welding seam can be detected only in the skylight time after every other day, and the potential safety hazard of train running exists.
The damage detection of the current flaw detector can be carried out only after the surface temperature is reduced to below 40 ℃. Flash welding and thermite welding are mainly used for welding railway rails, the temperature of a welding seam after beading and polishing is about 600 ℃ and 800 ℃, and the time for lowering to 40 ℃ suitable for flaw detection is about 2 hours. Therefore, there is an urgent need for quality inspection of the weld in a short time after completion of welding.
Aiming at the problems of the defects, the invention adopts the following technical scheme to improve.
Disclosure of Invention
The invention aims to provide a high-temperature detection method and a detection device for an in-service rail weld joint, and the technical scheme is as follows:
a high-temperature detection device for in-service rail welding seams is used for nondestructive detection of high-temperature welding seams (41) of in-service railway steel rails (4), and is connected with an analysis display instrument (3) through a lead (2), wherein the detection device (1) comprises a high-temperature-resistant shell (11) and a detection probe (12), and is characterized in that the detection device (1) further comprises a device for flowing gas or liquid refrigerant for cooling a detection sensor arranged on the detection probe (12);
the refrigerant flowing device comprises a refrigerant conduit (13) and a drainage pump (14) and is used for guiding gas or liquid refrigerant to flow in the cavity (112) of the shell (11).
In another embodiment, the housing (11) further comprises a refrigerant outlet (15) disposed near the detection end of the detection probe (12).
The detection device (1) is further provided with a switching device for switching the up-and-down movement of the detection sensor of the detection probe (12) in the cavity (112), the switching device comprises a rotating device (16) and a rolling shaft (17) which is rotatably connected to the rotating device (16), and the flexible annular belt (123) of the detection probe (12) can be connected to the rolling shaft (17) in an annular moving manner to drive the detection sensor on the flexible annular belt (123) to move up and down in a refrigerant in the cavity (112). Wherein the rotating device (16) is not limited to a small servo motor which is electrically driven, or various structures of mechanical press-and-pull transmission.
The detection sensors on the flexible annular belt (123) are one or more than one of eddy current sensors (121) or ultrasonic sensors (122) which are arranged in a random array mode, and one or more than one detection sensors can be selectively switched to serve as the sensors for detecting by the probe (12). A blank (124) without a detection sensor can be further arranged on the flexible annular belt (123), and when the detection device needs to stay on the detected steel rail for a long time, the blank (124) without the detection sensor is selected to be switched to so as to avoid damaging the detection sensor.
When the probe (12) selects to set a plurality of detection sensors for detection, the detection device (1) can be set to be a flat structure suitable for the width of the track welding seam (41), the plurality of detection sensors are arranged on the detection probe (12) in a strip shape, a plurality of eddy current sensors (121) or ultrasonic sensors (122) can be arranged in the width direction of the welding seam (41) in an array manner, the eddy current sensors and the ultrasonic sensors can be selectively moved along the surface of the welding seam for eddy current and ultrasonic detection, and eddy current scanning detection or ultrasonic scanning detection or eddy current and ultrasonic scanning detection can be selected for one time.
In order to perform ultrasonic detection simultaneously, the refrigerant flowing in the cavity (112) and flowing out of the refrigerant outlet (15) is selected to be silicon oil which is high temperature resistant, heat conductive and ultrasonic conductive, and the ultrasonic detection device has the functions of heat dissipation and ultrasonic conduction.
When necessary, the shell (11) of the detection device can be also provided with a vacuum heat insulation layer (111).
The invention also discloses a high-temperature detection method for the weld joint of the in-service railway, which is used for nondestructive detection of the high-temperature weld joint (41) of the in-service railway steel rail (4), and comprises the following specific steps:
a. starting a refrigerant flowing device: the high temperature resistant detection device is connected with the detection analyzer, and a refrigerant flowing device of the detection device is started to enable gas or liquid refrigerants to flow in a cavity of the high temperature detection device;
b. selecting a detection sensor: selecting a detection sensor on a corresponding probe required by the detection device;
c. and (3) high-temperature weld joint detection: detecting the required items by enabling the detection device arranged in the step to be close to the high-temperature steel rail welding seam;
d. data analysis and recording: and transmitting the detected data to a detection analyzer for data analysis.
The selective detection sensor in the step b is one or more of an eddy current detection sensor or an ultrasonic detection sensor selected by moving a flexible annular belt of the detection probe, and the selective detection sensor is selectively arrayed into a detection sensor array suitable for the width of the steel rail welding seam and is used for scanning and detecting along the welding seam direction at one time.
And c, when the data analyzed by the detection analyzer is abnormal in the step d, judging that the detection sensor is damaged by a high-temperature environment, and selecting a standby detection sensor by moving the flexible annular belt to start detecting from the step b again.
According to the technical scheme, the invention has the following beneficial effects:
the invention adopts a method of cooling a detection probe by internal circulation, namely, a stainless steel or ceramic high-temperature resistant outer sleeve or a vacuum heat insulation layer is added outside a welding seam eddy current detection probe base body, a flowing refrigerant (gas or liquid) is designed between the probe and a cavity of the outer sleeve to reduce the temperature of the probe, and the effective quality detection of a steel rail welding seam can be realized by a detector when the steel rail welding seam is at higher temperature (200 ℃ and 300 ℃). Particularly, during eddy current detection, the integrated detection device structure can enable the probe to be effectively lifted to be more than 15mm during eddy current detection of the weld joint of the high-temperature steel rail in service, namely enough space is left for the cooling device, effective nondestructive flaw detection can be carried out at the temperature below 800 ℃, the crystallization condition of the surface of the high-temperature weld joint is detected, the hot crack defect formed at the early stage of the weld joint of the steel rail and the cold crack defect formed in the cooling process are timely found, remedial measures are taken at the first time, potential safety hazards are avoided, the purpose of quick and efficient detection is achieved, and the detection problem of the railway industry at the high temperature of the weld joint of the rail in service is solved.
Secondly, the detection probe is also provided with a standby detection sensor, when the detection result is abnormal, the standby detection sensor is switched through the movement of the flexible annular belt, so that the problem that the detection sensor is damaged at high temperature is solved, the standby detection sensor of the detection probe can be switched, the re-detection is rapidly realized, and the in-service detection time is saved. And, when the detection sensor is switched through the up-and-down movement of the flexible annular belt, the detection sensor moves up and down in the cavity full of the refrigerant, so that the time for the detection sensor to approach the high-temperature steel rail welding seam is shortened, the heat-exchange radiating effect is further improved, and the detection sensor is effectively prevented from being damaged by a high-temperature environment.
The detection probe is provided with a plurality of sensor structures which are arrayed, and is simultaneously provided with the eddy current detection sensor and the ultrasonic detection sensor, through the moving switching selection of the flexible annular belt and the use of high-temperature-resistant silicon oil as a coupling agent, the detection probe can realize the one-time eddy current scanning detection or the one-time ultrasonic scanning detection on the high-temperature steel rail welding seam, or achieve the detection purpose of simultaneously carrying out the eddy current scanning detection and the ultrasonic scanning detection, reduce the contact of the detection sensor repeatedly contacting the high-temperature steel rail welding seam, realize the effect of rapid detection, and reduce the probability of the detection sensor being damaged by high temperature.
Drawings
FIG. 1 is a schematic view of an inspection apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a refrigerant outlet at the detection end of the detection device according to the preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a detecting sensor movement switching device in the detecting device according to the preferred embodiment of the present invention;
FIG. 4 is a schematic side view of a detecting sensor moving switching device in the detecting device according to the preferred embodiment of the present invention;
FIG. 5 is a schematic diagram of the layout of the test sensors on the flexible annular band of the test probe in accordance with the preferred embodiment of the present invention;
FIG. 6 is a schematic view of the detection apparatus according to the preferred embodiment of the present invention applied to the detection of the weld of the high temperature steel rail;
FIG. 7 is a schematic view of a flat inspection device with a probe of a strip array inspection sensor structure according to another embodiment of the present invention;
FIG. 8 is a schematic view of a flat width of a detecting device suitable for a welding seam according to another embodiment of the present invention;
FIG. 9 is a side view of another embodiment of the inspection device of the present invention in a use condition with a flat width suitable for a weld;
FIG. 10 is a flow chart of a detection method according to the preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description.
As shown in fig. 1, 2 and 6, the in-service rail weld joint high temperature detection device disclosed by the invention is used for nondestructive detection of a high temperature weld joint 41 of an in-service railway steel rail 4, is connected to an analysis display instrument 3 through a lead 2, and is characterized in that the detection device 1 further comprises a device for flowing gas or liquid refrigerant for cooling a detection sensor arranged on the detection probe 12, wherein the detection device 1 comprises a high temperature resistant shell 11 and a detection probe 12;
the refrigerant flowing device includes a refrigerant conduit 13 and a drainage pump 14, and is configured to guide a gas or liquid refrigerant to flow in the cavity 112 of the housing 11. As shown by the flow arrows of the refrigerant in fig. 1, the refrigerant conduit 13 is provided with an inlet and an outlet, and forms a switching flow of the refrigerant in the whole cavity 112.
In another embodiment, as shown in fig. 2, the refrigerant conduits 13 disposed above the housing 11 of the detection device 1 are all refrigerant inlets, and the refrigerant outlets 15 disposed below the housing 11 and near the detection end of the detection probe 12 flow out, as shown by the direction of the flow arrows of the refrigerant.
As shown in fig. 3, the detecting device 1 is further provided with a switching device for switching the up-and-down movement of the detecting sensor of the detecting probe 12 in the cavity 112, the switching device includes a rotating device 16 and a rolling shaft 17 rotatably connected to the rotating device 16, the flexible annular belt 123 of the detecting probe 12 is annularly movably connected to the rolling shaft 17, and the detecting sensor on the flexible annular belt 123 is driven to move up and down in the refrigerant in the cavity 112. The rotating device 16 is not limited to a small electric driven servo motor or various structures of mechanical pressing and pulling transmission, which is not the focus of the present invention and is a conventional means in the transmission mechanism, and will not be explained in detail.
As shown in fig. 5, the detecting sensor on the flexible annular belt 123 is one or more of the eddy current sensor 121 and the ultrasonic sensor 122 arranged in a random array, and one or more detecting sensors can be selectively switched to be used as the sensor for detecting by the probe 12. The flexible annular band 123 can also be provided with a blank 124 without a detection sensor, and when the detection device is required to stay on the detected steel rail for a long time, the blank 124 without the detection sensor is selected to be switched to, so that the contact time between the detection sensor and the welding seam of the high-temperature steel rail is reduced, and the probability of damaging the detection probe is reduced.
As shown in fig. 7, 8 and 9, according to another embodiment of the present invention, when the probe 12 selects to set a plurality of detection sensors for detection, the detection device 1 may be configured as a flat structure suitable for the width of the rail weld 41, the plurality of detection sensors are arranged on the detection probe 12 in a strip shape, a plurality of eddy current sensors 121 or ultrasonic sensors 122 may be simultaneously arranged in an array shape in the width direction of the weld 41, and move along the surface of the weld to selectively perform eddy current detection and ultrasonic detection, and select to perform eddy current scanning detection at a time, or perform ultrasonic scanning detection at a time, or select to perform eddy current scanning detection and ultrasonic scanning detection at a time.
As shown in fig. 7, the refrigerant is introduced from the refrigerant inlet 13 above the cavity of the housing 11 of the detection device 1, flows through the entire space of the flat inner cavity 112, and then flows out from the elongated refrigerant outlet 15 disposed below the housing 11 of the detection device 1, thereby achieving heat exchange and heat dissipation. The flexible annular belt 123 of the detection probe 12 is arranged in a cavity which is annularly and movably arranged along the width direction of the flat shell 11, a device for driving the flexible annular belt 123 can be designed to be composed of four rolling shafts 17, when flaw detection is carried out, the detection sensors are arranged in a long strip array mode and are close to a high-temperature steel rail welding seam, the array type eddy current detection sensors or the ultrasonic detection sensors can be movably selected and switched to carry out detection, or the array type eddy current detection sensors and the ultrasonic detection sensors can be selected to carry out nondestructive flaw detection on the high-temperature steel rail welding seam at the same time.
In order to perform ultrasonic detection simultaneously, the refrigerant introduced from the refrigerant inlet 13 above the cavity of the housing 11 into the cavity 112 and flowing out from the refrigerant outlet 15 is silicon oil or the like which is resistant to high temperature, heat conductive, and ultrasonic conductive, and has functions of heat dissipation and ultrasonic conduction.
The housing 11 of the detection apparatus 1 may also be provided with a vacuum insulation layer 111, if necessary.
As shown in the method flow of FIG. 10, the invention also discloses a high-temperature detection method for the weld joint of the in-service rail, which is used for the nondestructive detection of the high-temperature weld joint 41 of the in-service railway steel rail 4 and comprises the following specific steps:
a. starting a refrigerant flowing device: the high temperature resistant detection device is connected with the detection analyzer, and a refrigerant flowing device of the detection device is started to enable gas or liquid refrigerants to flow in a cavity of the high temperature detection device;
b. selecting a detection sensor: selecting a detection sensor on a corresponding probe required by the detection device;
c. and (3) high-temperature weld joint detection: detecting the required items by enabling the detection device arranged in the step to be close to the high-temperature steel rail welding seam;
d. data analysis and recording: and transmitting the detected data to a detection analyzer for data analysis.
The selective detection sensor in the step b is one or more of an eddy current detection sensor or an ultrasonic detection sensor selected by moving a flexible annular belt of the detection probe, and the selective detection sensor is selectively arrayed into a detection sensor array suitable for the width of the steel rail welding seam and is used for scanning and detecting along the welding seam direction at one time.
And c, when the data analyzed by the detection analyzer is abnormal in the step d, judging that the detection sensor is damaged by a high-temperature environment, and selecting a standby detection sensor by moving the flexible annular belt to start detecting from the step b again.
The above is one embodiment of the present invention. Furthermore, it is to be understood that all equivalent or simple changes in the structure, features and principles described in the present patent concepts are included in the scope of the present patent.
Claims (10)
1. A high-temperature detection device for in-service rail welding seams is used for nondestructive detection of high-temperature welding seams (41) of in-service railway steel rails (4), and is connected with an analysis display instrument (3) through a lead (2), wherein the detection device (1) comprises a high-temperature-resistant shell (11) and a detection probe (12), and is characterized in that the detection device (1) further comprises a device for flowing gas or liquid refrigerant for cooling a detection sensor arranged on the detection probe (12);
the refrigerant flowing device comprises a refrigerant conduit (13) and a drainage pump (14) and is used for guiding gas or liquid refrigerant to flow in the cavity (112) of the shell (11).
2. The in-service rail weld joint high-temperature detection device according to claim 1, wherein the shell (11) further comprises a refrigerant outlet (15) arranged near the detection end of the detection probe (12).
3. The in-service rail weld joint high-temperature detection device according to claim 1 or 2, characterized in that the detection device (1) is further provided with a switching device for switching the detection sensor of the detection probe (12) to move up and down in the cavity (112), the switching device comprises a rotating device (16) and a rolling shaft (17) rotatably connected to the rotating device (16), the flexible annular belt (123) of the detection probe (12) is annularly movably connected to the rolling shaft (17) to drive the detection sensor on the flexible annular belt (123) to move up and down in a refrigerant in the cavity (112).
4. The in-service track weld joint high-temperature detection device according to claim 3, wherein the detection sensors on the flexible annular belt (123) are one or more of eddy current sensors (121) or ultrasonic sensors (122) which are arranged in a random array.
5. The in-service rail weld joint high-temperature detection device according to claim 4, characterized in that the detection device (1) is configured into a flat structure suitable for the width of the rail weld joint (41), the eddy current sensors (121) or the ultrasonic sensors (122) on the detection probe (12) are arrayed in the width direction of the weld joint (41), and the eddy current and ultrasonic detection can be selectively performed by moving along the surface of the weld joint.
6. The in-service rail weld joint high-temperature detection device according to claim 4 or 5, wherein the coolant flowing out of the coolant outlet (15) after flowing in the cavity (112) is silicone oil which is high-temperature resistant, heat-conducting and ultrasonic-conducting.
7. The in-service rail weld joint high-temperature detection device according to claim 1, wherein the shell (11) further comprises a vacuum insulation layer (111).
8. A high-temperature detection method for a weld joint of an in-service rail is used for nondestructive detection of a high-temperature weld joint (41) of an in-service railway steel rail (4), and comprises the following specific steps:
a. starting a refrigerant flowing device: the high temperature resistant detection device is connected with the detection analyzer, and a refrigerant flowing device of the detection device is started to enable gas or liquid refrigerants to flow in a cavity of the high temperature detection device;
b. selecting a detection sensor: selecting a detection sensor on a corresponding probe required by the detection device;
c. and (3) high-temperature weld joint detection: detecting the required items by enabling the detection device arranged in the step to be close to the high-temperature steel rail welding seam;
d. data analysis and recording: and transmitting the detected data to a detection analyzer for data analysis.
9. The in-service rail weld joint high-temperature detection method according to claim 8, wherein the corresponding detection sensor selected in the step b is one or more of an eddy current detection sensor or an ultrasonic detection sensor selected by moving a flexible annular belt of a detection probe, and the detection sensor array is optionally arrayed in an array suitable for the width of the rail weld joint and is scanned and detected along the weld joint direction at one time.
10. The in-service rail weld joint high-temperature detection method according to claim 8 or 9, characterized in that when the data analyzed by the detection analyzer in the step d is abnormal, the detection sensor is judged to be damaged by the high-temperature environment, and the detection sensor which is selected to be spare by moving the flexible annular belt is used for detecting again from the step b.
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| CN202010892099.6A CN111965250B (en) | 2020-08-31 | 2020-08-31 | In-service rail weld joint high-temperature detection method and detection device thereof |
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| CN202010892099.6A CN111965250B (en) | 2020-08-31 | 2020-08-31 | In-service rail weld joint high-temperature detection method and detection device thereof |
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| CN111965250B CN111965250B (en) | 2022-06-21 |
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| CN103323458A (en) * | 2013-05-23 | 2013-09-25 | 华东理工大学 | Weld joint detection apparatus, weld joint detection system and weld joint detection method |
| CN105806953A (en) * | 2014-12-30 | 2016-07-27 | 中核武汉核电运行技术股份有限公司 | Water-immersion ultrasonic angle adjusting device and method capable of realizing underwater calibrating |
| 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 |
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2020
- 2020-08-31 CN CN202010892099.6A patent/CN111965250B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2000047987A1 (en) * | 1999-02-12 | 2000-08-17 | R/D Tech_Inc | Multi-element probe with multiplexed elements for non-destructive testing |
| EP2525218A1 (en) * | 2011-05-19 | 2012-11-21 | Hitachi-GE Nuclear Energy, Ltd. | Heat-resistant ultrasonic sensor and installation method thereof |
| CN102699033A (en) * | 2012-05-15 | 2012-10-03 | 北京首钢自动化信息技术有限公司 | Rolling mill SONY magneto-scale online redundancy method |
| CN103323458A (en) * | 2013-05-23 | 2013-09-25 | 华东理工大学 | Weld joint detection apparatus, weld joint detection system and weld joint detection method |
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| CN111965250B (en) | 2022-06-21 |
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