An ultrasonic testing device and method for water ingress into a tension clamp used for large cross-section conductors.

Abstract

This invention discloses an ultrasonic detection device and method for water ingress into tension clamps used for large-section conductors. The detection device includes a slide rail device placed on the uncompressed surface of the tension clamp; a scanner slidably connected to the slide rail device; a phased array ultrasonic detector connected to the scanner; and an electronic angle measuring instrument mounted on the ultrasonic probe and connected to both the scanner and the phased array ultrasonic detector. It also includes an ultrasonic image imaging module, a data processing module, and a control and adjustment module. This invention utilizes the phased array ultrasonic detector, electronic angle measuring instrument, scanner, and slide rail device to quickly detect water ingress inside tension clamps used for large-section conductors, rapidly eliminating potential hazards, ensuring the normal use of tension clamps, and guaranteeing the normal operation of high-voltage transmission lines.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power system strain clamp, and particularly relates to a water inlet ultrasonic detection device and method for a large-section conductor strain clamp. BACKGROUND

[0002] The strain clamp is composed of an aluminum sleeve and a steel anchor, and the aluminum pipe-steel anchor and the aluminum pipe-conductor position are shaped by pressure, so that the conductor and the strain clamp are combined to form a whole, which can bear the entire tension of the conductor in the high-voltage transmission line, and also serves as a conductor to conduct current, and is an important fitting in the transmission line.

[0003] During the operation of the high-voltage transmission line, the strain clamp generally has the following problems: 1) when the pressure connection process of the aluminum pipe-steel anchor area is insufficient, the anti-skid groove is not compacted with the aluminum pipe, so that the steel anchor is broken due to stress problems in the subsequent operation process, and rainwater and other liquids enter the strain clamp through the gap of the broken part, thereby causing corrosion; 2) when the aluminum pipe-conductor area is pressure connected, the aluminum stock is scattered or broken; the aluminum pipe and the aluminum wire have a gap due to insufficient pressure or internal aluminum stock breakage due to overpressure during the pressure connection; and rainwater and other liquids enter the strain clamp to cause corrosion in the subsequent operation. If the water inlet condition in the strain clamp for the large-section conductor cannot be known, the normal use of the strain clamp will be affected, and the normal operation of the high-voltage transmission line will be affected. SUMMARY

[0004] In order to solve the above technical problems, the application provides a water inlet ultrasonic detection device and method for a large-section conductor strain clamp, which uses a phased array ultrasonic detector, an electronic angle measuring instrument, a scanner and a sliding rail device to quickly detect the water inlet condition in the strain clamp for the large-section conductor, quickly eliminate hidden dangers, ensure the normal use of the strain clamp, and ensure the normal operation of the high-voltage transmission line.

[0005] The technical scheme adopted by the application is:

[0006] An ultrasonic testing device for water ingress into a tension clamp for a large cross-section conductor includes: a slide rail device placed on the uncompressed surface of the tension clamp; a scanner slidably connected to the slide rail device, the scanner having a placement groove adapted to an ultrasonic probe, the ultrasonic probe being held in the placement groove, and both ends of the scanner being rotatably connected to a connection interface via a first rotating shaft, the connection interface being rotatably connected to a roller via a second rotating shaft; a phased array ultrasonic detector connected to the scanner, comprising an ultrasonic probe and an ultrasonic data processing terminal connected to each other; and an electronic angle measuring instrument mounted on the ultrasonic probe. The electronic angle measuring instrument is connected to both the scanner and the phased array ultrasonic detector, and is used to set the angle of synchronous movement of the ultrasonic probe and the scanner, and to accurately measure the angle values ​​of the ultrasonic probe and the scanner. It also includes: an ultrasonic image imaging module, which includes an ultrasonic signal processor connected to the ultrasonic probe, used to generate an electrical signal from the echo signal received by the ultrasonic probe through the ultrasonic piezoelectric effect, and then display the processed signal; a data processing module, used to receive the angle value data measured by the electronic angle measuring instrument and the image processed by the ultrasonic image imaging module, and to perform real-time image overlay processing and numbering and storage; and a control and adjustment module, used to control the scanning speed of the ultrasonic probe to obtain a stable image signal in one pass.

[0007] Preferably, the slide rail device includes a first opening and closing surface and a second opening and closing surface in a semi-circular shape. The first opening and closing surface and the second opening and closing surface are connected by bolts. The inner sidewalls of the first opening and closing surface and the second opening and closing surface are sequentially provided with a first sliding groove, a groove and a second sliding groove arranged in parallel with each other. The first sliding groove and the second sliding groove are adapted to the roller.

[0008] Preferably, the first surface of the electronic angle measuring instrument is provided with a digital display screen, an angle setting button, a setting reset button, and a power switch button; the second surface of the angle measuring instrument is provided with a plug; and a third signal input / output channel is connected to one side of the angle measuring instrument, wherein the first surface and the second surface are symmetrically arranged.

[0009] Preferably, the ultrasonic probe is connected to the scanner via a first signal input / output channel to the connection interface; the electronic angle measuring instrument is connected to the scanner via a second signal input / output channel.

[0010] Preferably, the electronic angle measuring instrument is connected to the ultrasonic probe through a third signal input / output channel.

[0011] Preferably, the electronic angle measuring instrument is connected with a fixing frame, the fixing frame comprises a spring and a chuck fixedly connected to both ends of the spring, a fixing block is fixedly connected to the middle of the spring, and an insertion slot matched with the plug is formed in the fixing block.

[0012] In addition, the application further provides an ultrasonic detection method for water ingress of a strain clamp for large-section conductors, comprising the following steps:

[0013] 1) Find the un-pressed area of the strain clamp for large-section conductors, place the slide rail device on the surface of the un-pressed area of the strain clamp for large-section conductors, place the rollers on the scan device in the first sliding groove and the second sliding groove of the slide rail device, fix the electronic angle measuring instrument on the ultrasonic probe, and place the ultrasonic probe in the placement slot of the scan device;

[0014] 2) Connect the electronic angle measuring instrument with the scan device, set the angle range of the scan device through the electronic angle measuring instrument, and control the sliding path of the scan device in the first sliding groove and the second sliding groove of the slide rail device;

[0015] 3) The scan device and the ultrasonic probe move synchronously, the ultrasonic probe emits an acoustic signal and receives a reflected acoustic signal every time it passes through a set scan angle, then the acoustic signal is converted into an electrical signal through an ultrasonic image imaging module, and further drawn into a waveform image and color marked and numbered;

[0016] 4) The drawn waveform image is transmitted to a data processing module for graphic superposition processing and saved;

[0017] 5) After the data processing module completes the operation, a signal is sent to a control adjustment module, then the control adjustment module sends a continue-to-move instruction to the scan device, and drives the ultrasonic probe to move to the next set scan angle to obtain new ultrasonic image imaging data;

[0018] 6) After completing the complete 90° movement, whether there is an abnormal waveform image in all several waveform images after complete image superposition is observed and compared to determine whether the un-pressed area inside the strain clamp is waterlogged: if there is an abnormal waveform image, the un-pressed area inside the strain clamp is waterlogged and the position to which the abnormal waveform image belongs is preliminarily determined as the water ingress area;

[0019] 7) Repeat steps 2) to 6), if the judgment results of two times are consistent, it can be determined that the strain clamp is waterlogged.

[0020] Preferably, the path to be slid is wiped and smeared with a viscous coupling agent before the scan is performed, so as to avoid air entering between the ultrasonic probe and the scan rail and interfering with the ultrasonic image imaging data, and thus affecting the drawn waveform image.

[0021] Preferably, the viscous coupling agent thickness is set to 2-3 cm.

[0022] Preferably, the starting position of the ultrasonic probe detection is the outer wall of the strain clamp corresponding to the lowest point of the arc surface inside the strain clamp when the electronic angle measuring instrument reading is 0°, and the ultrasonic probe is perpendicular to the lowest point of the arc surface inside the strain clamp.

[0023] The beneficial effects of the present application are: 1) the strain clamp internal water ingress is ultrasonically detected by the ultrasonic probe of the phased array ultrasonic detector; 2) the ultrasonic probe is quickly detected on the surface of the strain clamp by the slide rail device;

[0024] 3) the ultrasonic probe is freely slid on the slide rail device by the scanner; 4) the electronic angle measuring instrument can freely set and measure the angle of the ultrasonic probe detection, increase the detection range, and ensure the accuracy and stability of the later image imaging; 5) the ultrasonic image imaging module can quickly display and analyze and judge the strain clamp internal water ingress, facilitate maintenance and repair, and improve the service life of the strain clamp. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the flow chart of the strain clamp water detection method for large cross-section conductors in the present application;

[0026] Figure 2 is the slide rail device structure schematic diagram in the present application;

[0027] Figure 3 is the ultrasonic probe structure schematic diagram in the present application;

[0028] Figure 4 is the fixed frame structure schematic diagram in the present application;

[0029] Figure 5 is the scanner structure schematic diagram in the present application;

[0030] Figure 6 is the front view of the electronic angle measuring instrument in the present application;

[0031] Figure 7 is the rear view of the electronic angle measuring instrument in the present application.

[0032] In the figure: 1, slide rail device; 11, first opening and closing surface; 12, second opening and closing surface; 13, first sliding groove; 14, second sliding groove; 15, groove; 2, bolt; 31, ultrasonic probe; 32, first signal access channel; 4, electronic angle measuring instrument; 41, numerical display screen; 42, angle setting button; 43, setting reset button; 44, power switch; 45, plug; 46, second signal access channel; 5, fixing frame; 51, chuck; 52, spring; 53, slot; 6, scanner; 61, roller; 62, placement slot; 63, third signal access channel; 64, first rotating shaft; 65, second rotating shaft; 66, connecting interface. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0034] It should be noted that in the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application. The device or element indicated or implied must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. EMBODIMENT

[0035] As shown in Figures 2-7 An ultrasonic detection device for water ingress of a large cross-section conductor strain clamp, comprising a slide rail device 1, the slide rail device 1 is placed on the surface of the non-pressed area of the large cross-section conductor strain clamp, and is used for convenient and fast detection of the non-pressed area of the large cross-section conductor strain clamp. Specifically, as shown in Figure 2 The slide rail device 1 comprises a first opening and closing surface 11 and a second opening and closing surface 12 in a semi-ring type, the first opening and closing surface 11 and the second opening and closing surface 12 are connected by a bolt 2, and the inner side walls of the first opening and closing surface 11 and the second opening and closing surface 12 are sequentially provided with a first sliding groove 13, a groove 15 and a second sliding groove 14 arranged in parallel with each other, and the first sliding groove 13 and the second sliding groove 14 are matched with the roller 61.

[0036] A scanner 6 is provided with a placement slot 62 matched with the ultrasonic probe 31, the ultrasonic probe 31 is clamped in the placement slot 62, and the two ends of the scanner 6 are respectively rotatably connected with a connecting interface 66 through a first rotating shaft 64, and the connecting interface 66 is rotatably connected with a roller 61 through a second rotating shaft 65; the roller 61 of the scanner 6 is slidingly connected in the first sliding groove 13 and the second sliding groove 14 of the slide rail device 1.

[0037] A phased array ultrasonic testing instrument is used to perform ultrasonic testing on the uncompressed area of ​​a tension clamp for a large cross-section conductor. The phased array ultrasonic testing instrument is connected to the scanner 6 and includes an ultrasonic probe 31 and an ultrasonic data processing terminal that are connected to each other.

[0038] An electronic angle measuring instrument 4 is mounted on the ultrasonic probe 31. The electronic angle measuring instrument 4 is connected to both the scanner 6 and the phased array ultrasonic detector, and is used to set the angle at which the ultrasonic probe 31 and the scanner 6 move synchronously, and to accurately measure the angle values ​​of the ultrasonic probe 31 and the scanner 6. Specifically, as shown... Figures 6-7 As shown, the first surface of the electronic angle measuring instrument 4 is provided with a numerical display screen 41, an angle setting button 42, a setting reset button 43, and a power switch button 44. The second surface of the angle measuring instrument is provided with a plug 45. A third signal input / output channel 63 is connected to one side of the angle measuring instrument. The first surface and the second surface are symmetrically arranged.

[0039] It also includes an ultrasonic image imaging module, which includes an ultrasonic signal processor connected to the ultrasonic probe 31, used to generate an electrical signal from the echo signal received by the ultrasonic probe 31 through the ultrasonic piezoelectric effect and display it after processing by the ultrasonic signal processor; a data processing module, used to receive the angle value data measured by the electronic angle measuring instrument 4 and the image processed by the ultrasonic image imaging module, and to perform real-time image superposition processing and numbering and saving; and a control and adjustment module, used to control the scanning speed of the ultrasonic probe 31 so as to obtain a stable image signal in one go.

[0040] As a further embodiment, the ultrasonic probe 31 is connected to the scanner 6 via the first signal input / output channel 32 to the connection interface 66; the electronic angle measuring instrument 4 is connected to the scanner 6 via the second signal input / output channel 46; and the electronic angle measuring instrument 4 is connected to the ultrasonic probe 31 via the third signal input / output channel 63. The above connection method is to facilitate the synchronous setting and updating of data between the electronic angle measuring instrument 4, the scanner 6, and the ultrasonic probe 31.

[0041] As a further embodiment, the electronic angle measuring instrument 4 is connected to a fixing frame 5. The fixing frame 5 includes a spring 52 and clamps 51 fixedly connected to both ends of the spring 52. A fixing block is fixedly connected to the middle of the spring 52. The fixing block has a slot 53 that is compatible with the plug 45 in order to ensure the stability of the electronic angle measuring instrument 4 on the ultrasonic probe 31. Example

[0042] like Figure 1 As shown, an ultrasonic testing method for water ingress into a tension clamp used for large cross-section conductors includes the following specific steps:

[0043] 1) Find the non-pressed area of the strain clamp for large cross-section conductor, place the slide rail device 1 on the surface of the non-pressed area of the strain clamp for large cross-section conductor, place the roller 61 on the scanner 6 in the first sliding groove 13 and the second sliding groove 14 of the slide rail device 1, fix the electronic angle measuring instrument 4 on the ultrasonic probe 31, and place the ultrasonic probe 31 in the placement groove 62 of the scanner 6;

[0044] 2) Connect the electronic angle measuring instrument 4 with the scanner 6, set the angle range of the scanner 6 to be scanned by the electronic angle measuring instrument 4 to be 0°~90°, and control the sliding path of the scanner 6 in the first sliding groove 13 and the second sliding groove 14 of the slide rail device 1;

[0045] 3) The scanner 6 and the ultrasonic probe 31 move synchronously, the ultrasonic probe 31 emits an acoustic signal every 1° and receives the reflected acoustic signal, then converts the acoustic signal into an electrical signal through the ultrasonic image imaging module, further draws a waveform image and performs color marking and numbering;

[0046] 4) The drawn waveform image is transmitted to the data processing module for graphic overlay processing and saved;

[0047] 5) After the data processing module completes the operation, a signal is sent to the control adjustment module, and then the control adjustment module sends a continue forward instruction to the scanner 6, which drives the ultrasonic probe 31 to move to the next 1° to obtain new ultrasonic image imaging data;

[0048] 6) After completing the complete 90° movement, observe and compare whether there is an abnormal waveform image after the complete image overlay of several waveform images to determine whether the strain clamp is waterlogged: if there is an abnormal waveform image, the non-pressed area inside the strain clamp is waterlogged and the position of the abnormal waveform image is preliminarily determined as the waterlogging area;

[0049] 7) Repeat steps 2)~6), if the results of the two determinations are consistent, it can be determined that the strain clamp is waterlogged.

[0050] As a further embodiment of the present embodiment, the path to be slid needs to be wiped before scanning, and a viscous coupling agent is applied, the thickness of which can be set to 2~3cm to avoid air entering between the ultrasonic probe 31 and the scanner 6 slide rail and interfering with the ultrasonic image imaging data, thereby affecting the drawn waveform image.

[0051] As a further embodiment of the present embodiment, the starting position of the ultrasonic probe 31 is the outer wall of the strain clamp corresponding to the reading of 0° of the electronic angle measuring instrument 4, and the ultrasonic probe 31 is perpendicular to the lowest point arc surface inside the strain clamp.

[0052] The working principle of the present application: stop the scanner at the lowest position of the first and second sliding grooves of the sliding rail device, set the working range of the scanner to 0-90° with a scanning step of 1°, set the angle of the electronic angle measuring instrument to 0°, synchronize the angle data of the electronic angle measuring instrument with the working range of the scanner, convert and process the acquired echo signals of the ultrasonic probe through the ultrasonic image imaging module to draw waveform images, a total of 90 waveform images can be obtained and these waveform images are marked with different colors and numbered; after superimposition processing of the 90 waveform images drawn by the data processing module, observation and comparison are performed again: if the waveform of a waveform image does not completely coincide with the waveform of other waveform images, record the angle corresponding to the waveform of the waveform image at this time; re-detect, if the same result as the first time is obtained, it is proved that the inside of the strain clamp for large cross-section conductor has entered water; if the result obtained in the second time is different from the first time, only the place marked by the ultrasonic probe is checked in the third time, the obtained waveform image is compared with the waveform image of the strain clamp for large cross-section conductor without water, if they are different, it is proved that the inside of the strain clamp for large cross-section conductor has entered water, otherwise, it has not entered water.

[0053] The above-described embodiments are merely preferred embodiments of the present application, and are not intended to limit the scope of the present application. Without departing from the principles and the essence of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope of the present application as defined by the claims.

Claims

1. An apparatus for ultrasonic detection of water penetration into a strain clamp for a large cross-section conductor, characterized in that, The utility model relates to a kind of electronic angle measuring instrument and the method for using it, including: Slide rail device (1), the slide rail device (1) is placed in the surface of the unpressing area of large-section conductor strain clamp; Scanner (6), the scanner (6) is slidably connected to the slide rail device (1), the scanner (6) is provided with the placement slot (62) matched with ultrasonic probe (31), the ultrasonic probe (31) is clamped in the placement slot (62), the both ends of the scanner (6) are rotatably connected with connection interface (66) by first rotation shaft (64), the connection interface (66) is rotatably connected with gyro wheel (61) by second rotation shaft (65); Phased array ultrasonic detector, the phased array ultrasonic detector is connected with the scanner (6), and it includes ultrasonic probe (31) and ultrasonic data processing terminal connected with each other; Electronic angle measuring instrument (4), the electronic angle measuring instrument (4) is provided on the ultrasonic probe (31), and the electronic angle measuring instrument (4) is connected with scanner (6) and phased array ultrasonic detector respectively, and the angle value of ultrasonic probe (31) and scanner (6) is accurately measured; The slide rail device (1) includes first open-close surface (11) and second open-close surface (12) of half ring type, the first open-close surface (11) and second open-close surface (12) are connected by bolt (2), and the inner side wall of the first open-close surface (11) and second open-close surface (12) is sequentially provided with first sliding groove (13), recess (15) and second sliding groove (14) arranged in parallel with each other;The first sliding groove (13) and second sliding groove (14) are matched with the gyro wheel (61); Wherein, the electronic angle measuring instrument (4) is used for setting the angle range of scanner (6) scanning is 0 °~90 °, scanner (6) and ultrasonic probe (31) move synchronously;And control the sliding path of scanner (6) in the first sliding groove (13) and second sliding groove (14) of slide rail device (1); Further including: Ultrasonic image imaging module, which includes an ultrasonic signal processor connected to the ultrasonic probe (31), for displaying the echo signal received by the ultrasonic probe (31) through ultrasonic piezoelectric effect and ultrasonic signal processor processing; Data processing module, for receiving the angle value data measured by the electronic angle measuring instrument (4) and receiving the image processed by the ultrasonic image imaging module, and for real-time superposition processing and numbered saving of the image; Control adjustment module, for controlling the scanning speed of the ultrasonic probe (31) to obtain stable image signal at a time.

2. The water inlet ultrasonic testing device for the strain clamp of large cross-section conductor according to claim 1, characterized in that, The first surface of the electronic angle measuring instrument (4) is provided with a numerical display screen (41), an angle setting button (42), a setting reset button (43), a power switch (44) button, the second surface of the angle measuring instrument is provided with a plug (45), one side of the angle measuring instrument is connected with a third signal inlet and outlet channel (63), and the first surface and the second surface are symmetrically arranged.

3. The water ingress ultrasonic testing apparatus for a strain clamp for a large cross-section conductor according to claim 1, characterized by The ultrasonic probe (31) is connected to the connection interface (66) and the scanner (6) through a first signal access channel (32); and the electronic angle measuring instrument (4) is connected to the scanner (6) through a second signal access channel (46).

4. The water inlet ultrasonic testing device for the strain clamp of large cross-section conductor according to claim 2, characterized in that, The electronic angle measuring instrument (4) is connected to the ultrasonic probe (31) through a third signal access channel (63).

5. The water ingress ultrasonic testing apparatus for a strain clamp for a large cross-section conductor according to claim 2, characterized by The electronic angle measuring instrument (4) is connected with a fixing frame (5), which comprises a spring (52) and a chuck (51) fixedly connected to both ends of the spring (52), and a fixing block fixedly connected to the middle of the spring (52), and a slot (53) matching the plug (45) is formed in the fixing block.

6. A detection method of an ultrasonic water inlet detection device for a strain clamp for a large cross-section conductor according to any one of claims 1 to 5, characterized by, The detection method comprises the following steps: 1) finding the non-pressing area of the strain clamp for large-section conductor, placing the slide rail device (1) on the surface of the non-pressing area of the strain clamp for large-section conductor, placing the roller (61) on the scanner (6) in the first sliding groove (13) and the second sliding groove (14) of the slide rail device (1), fixing the electronic angle measuring instrument (4) on the ultrasonic probe (31), and placing the ultrasonic probe (31) in the placing groove (62) of the scanner (6); 2) connecting the electronic angle measuring instrument (4) and the scanner (6), setting the angle range of the scanner (6) to be scanned by the electronic angle measuring instrument (4) to be 0°~90°, and controlling the sliding path of the scanner (6) in the first sliding groove (13) and the second sliding groove (14) of the slide rail device (1); 3) synchronously moving the scanner (6) and the ultrasonic probe (31), the ultrasonic probe (31) emits an acoustic signal every time it passes through a set scanning angle and receives the reflected acoustic signal, then converts the acoustic signal into an electrical signal through an ultrasonic image imaging module, further draws a waveform image and performs color marking and numbering; 4) transmitting the drawn waveform image to the data processing module for graphic superposition processing and saving; 5) after the data processing module completes the operation, sending a signal to the control adjustment module, then the control adjustment module sends a continue-to-move forward instruction to the scanner (6), driving the ultrasonic probe (31) to move to the next set scanning angle to obtain new ultrasonic image imaging data; 6) after completing the complete 90° movement, observing and comparing a plurality of waveform images after complete image superposition to determine whether there is an abnormal waveform image to determine whether the non-pressing area inside the strain clamp is waterlogged: if there is an abnormal waveform image, the non-pressing area inside the strain clamp is waterlogged and the position of the abnormal waveform image is preliminarily determined as the waterlogging area; 7) repeating steps 2)~6), if the judgment results of two times are consistent, it can be determined that the strain clamp is waterlogged.

7. The method of claim 6, wherein the method is characterized by: Before scanning, the path to be slid needs to be wiped and a viscous coupling agent needs to be applied to avoid air entering between the ultrasonic probe (31) and the scanner (6) slide rail to interfere with the ultrasonic image imaging data and affect the drawn waveform image.

8. The method of claim 6, wherein the method is characterized by: The thickness of the viscous coupling agent is set to 2~3 cm.

9. The method of claim 6, wherein the method is characterized by: The starting position detected by the ultrasonic probe (31) is the outer wall of the strain clamp corresponding to the reading of 0° of the electronic angle measuring instrument (4), and the ultrasonic probe (31) is perpendicular to the lowest point arc surface inside the strain clamp.

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