CN212459525U - Manual scanning device without guide rail and phased array ultrasonic detection system - Google Patents

Abstract

The embodiment of the application provides a manual scanning device of no guide rail and phased array ultrasonic testing system, includes: the probe lifting assembly comprises a frame main body provided with a slide rail and at least three rollers and a probe lifting assembly fixed on the track of the slide rail; the bottom of the probe lifting assembly is provided with a probe wedge block, the probe wedge block is provided with a first through hole for limiting a probe of the phased array detector, the top of the probe lifting assembly is provided with an upper fixing plate, and the upper fixing plate is provided with at least one spring; one end of the spring is connected with the upper fixing plate, the other end of the spring abuts against the lower fixing plate, and a vertical downward pressure is applied to the lower fixing plate and the clamping legs when the spring is in a compressed state, so that a probe of the phased array detector is tightly attached to a detection surface of an object to be scanned; this application can realize avoiding the probe to rock and improving detection efficiency phased array detection device's effective fixed.

Description

Manual scanning device without guide rail and phased array ultrasonic detection system

Technical Field

The application relates to the field of detection equipment, in particular to a guide-rail-free manual scanning device and a phased array ultrasonic detection system.

Background

Gis (gas insulated substation) is an english abbreviation of gas insulated fully enclosed switchgear. The GIS is composed of a circuit breaker, a disconnecting switch, a grounding switch, mutual inductors (CT and PT), a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, all of the equipment or components are enclosed in a metal grounded shell, and SF6 insulating gas with certain pressure is filled in the metal grounded shell, so that the GIS is also called as an SF6 totally-enclosed combined electrical appliance.

The tank body material of the current stage of each manufacturer is mainly aluminum alloy 5A02-H112 or 5083, and part of the tank body material is stainless steel or low-carbon steel. The thickness of the tank body with the voltage class below 500kV is generally 8mm, and the thickness of the extra-high voltage tank body is from 16mm to 25 mm. The method is specifically proposed in a technical supervision scheme special for metal of a national power grid company: newly-built transformer engineering each manufacturer's GIS casing of each model carries out the selective examination according to longitudinal joint 10% (length). The inspection standard is according to NB/T47013.3-2015 No. 3 of nondestructive testing of pressure-bearing equipment: the related requirements in ultrasonic detection. When the wall thickness of the welding part is less than 8mm, the No. 3 part of the bearing equipment nondestructive testing is recommended to be referred to NB/T47013.3-2015: relevant provisions are made in appendix H of the ultrasonic examination for wall thicknesses of 8 mm. The classification standard of the welding joint executes the 10.1.6 requirements of JB/T4734 and 2002 aluminum welding container, the longitudinal welding joint of the cylindrical part of the GIS shell belongs to the A-class welding joint, and the ultrasonic detection is not lower than the II-class qualified welding joint, so that the market has strict requirements on the welding joint of the GIS shell.

The butt weld welding of the GIS shell generally adopts manual argon tungsten-arc welding, the automatic welding adopts MIG welding, the GIS weld joint is easy to have defects of air holes, incomplete penetration, incomplete fusion, cracks and the like, and the stable operation of the system is influenced because the working stress can crack during the operation, so that the GIS shell is subjected to nondestructive testing timely and regularly, and hidden dangers are eliminated timely.

In the prior art, the conventional A ultrasonic detection technology is generally adopted for detecting the butt weld of the GIS shell, and the aluminum weld attenuation is small, so that the high-frequency detection is preferably adopted, and 5.0MHz is generally adopted. Considering that the GIS shell is 8-25 mm thick and belongs to a thin plate, in order to effectively detect that the groove is not fused, the axis of a wave beam is perpendicular to the surface of the groove as much as possible, so that a 70-degree short-front-edge probe is generally selected as a probe. The wafer size is generally 8X 8 mm. However, the conventional ultrasonic detection has the following defects:

the welding seam defect direction of the GIS shell is uncertain, but the refraction angle of the conventional ultrasonic probe is fixed, so that the optimal detection angle of the defect can not be ensured all the time, and the defect signal is smaller than the actual defect signal or the defect can not be detected;

2. because the GIS shell is very thin and is mostly only 8mm thick, the A scanning signal identification difficulty is very high, and a defect signal is easily submerged in an initial pulse signal to cause missing detection;

3. because the probe needs to be moved back and forth during the conventional A ultrasonic detection, and the GIS shell has curvature, the coupling between the probe and the shell is not good in the back and forth moving process, and the defects and the omission factor can be caused.

Therefore, the inventor provides a guide-rail-free manual scanning device and a phased array ultrasonic detection system by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the application provides a manual scanning device of no guide rail and phased array ultrasonic testing system can realize effectively fixing phased array detecting instrument, avoids the probe to rock, guarantees the inseparable laminating between probe and the detection face in the detection, simplifies the manual operation flow, improves detection efficiency.

In order to solve the technical problem, the application provides the following technical scheme:

in a first aspect, the present application provides a scanning device comprising:

the probe lifting assembly comprises a frame main body provided with a slide rail and at least three rollers and a probe lifting assembly fixed on the track of the slide rail;

the bottom of the probe lifting assembly is provided with a probe wedge block, the probe wedge block is provided with a first through hole for limiting a probe of the phased array detector, the top of the probe lifting assembly is provided with an upper fixing plate, and the upper fixing plate is provided with at least one spring;

one end of the spring is connected with the upper fixing plate, the other end of the spring is connected with the lower fixing plate, the spring is in a loose state under normal conditions, when the fixing plate is installed on an I-shaped beam of the movable support through the sliding block, the spring is compressed due to the height limitation of the I-shaped beam and the detection surface, and a vertical downward pressure is applied to the lower fixing plate and the clamping legs, so that a probe of the phased array detector is tightly attached to the detection surface of an object to be scanned.

Furthermore, the probe lifting assembly further comprises a first sliding block fixing plate, and a first screw with one end extending into the sliding rail is arranged on the first sliding block fixing plate.

Further, the probe wedge has a bottom surface with a curvature.

Further, the probe lifting assembly further comprises a lower fixing plate arranged at the bottom and used for bearing the phased array detector, and a guide rail connected with the lower fixing plate and the upper fixing plate.

Furthermore, the probe lifting assembly further comprises a clamping frame supporting leg connected with the lower fixing plate and the probe wedge block, and one end of the clamping frame supporting leg is connected with the lower fixing plate through a second screw vertically arranged.

Furthermore, a second through hole used for limiting the second screw is formed in the lower fixing plate.

Furthermore, the other end of the supporting leg of the clamping frame is connected with the probe wedge block through a third screw arranged horizontally.

The water path tapping assembly comprises a universal joint for inputting coupling agent and at least one first water pipe joint for outputting the coupling agent, a second water pipe joint is arranged on the upper end face of the probe wedge block corresponding to the first water pipe joint, and a third through hole communicated with the second water pipe joint and the lower end face of the probe wedge block is further formed in the probe wedge block.

Further, still including fixing the encoder subassembly on the track of slide rail, the encoder subassembly include with the detection face in close contact with of waiting to scan the object the encoder gyro wheel and be used for with the encoder interface that the phased array detector is electric to be connected.

Furthermore, the encoder component further comprises a second sliding block fixing plate, and a fourth screw with one end extending into the sliding rail is arranged on the second sliding block fixing plate.

Further, the roller is connected with the frame body through a roller locking handle.

Further, at least one manual handle is further arranged on the frame main body.

Furthermore, the frame main body is formed by connecting 5I-shaped aluminum alloy sections in a shape like the Chinese character ri.

In a second aspect, the present application provides a phased array ultrasonic inspection system, comprising a phased array inspection apparatus, further comprising a scanning apparatus as described above for connecting to the phased array inspection apparatus;

the phased array detector is provided with at least two interfaces, wherein one interface is connected with the encoder interface through a transmission line, so that the phased array detector can acquire displacement signals in the detection process; the other interface is connected with the probe through a transmission line, so that the phased array detector can acquire ultrasonic signals inside the welding line in the detection process.

According to the technical scheme, the application provides a guide-rail-free manual scanning device and a phased array ultrasonic detection system, the scanning device can conveniently and flexibly move on a detection surface of an object to be scanned through a frame main body provided with at least three rollers, meanwhile, a slide rail is further arranged on the frame main body, so that a probe lifting component fixed on the slide rail can flexibly displace, a probe wedge block is arranged at the bottom of the probe lifting component, a first through hole is formed in the probe wedge block to limit a probe of a phased array detector extending into the probe wedge block, an upper fixing plate is further arranged at the top of the probe lifting component, at least one spring is arranged on the upper fixing plate, one end of the spring is connected with the upper fixing plate, and the other end of the spring abuts against the lower fixing plate, and when the spring is in a compressed state, a vertical downward pressure is applied to the lower fixing plate and the clamping legs, so that the probe of the phased array detector is tightly attached to the detection surface of the object to be scanned, the phased array detection device is effectively fixed, the probe is prevented from shaking, the tight attachment between the probe and the detection surface in the detection process is ensured, the manual operation process is simplified, and the detection efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of a scanning apparatus according to the present application;

FIG. 2 is a schematic structural view of the scanning device according to the present application when the scanning device is disposed on an object to be scanned;

FIG. 3 is a schematic structural view of a probe lift assembly according to the present application;

FIG. 4 is a schematic structural view of a waterway shunting assembly according to the present application;

FIG. 5 is a schematic diagram of an encoder assembly according to the present application.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, 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, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Various defects generated by the conventional A ultrasonic detection technology for detecting the butt weld of the GIS shell in the prior art are considered.

In order to realize effectively fixed phased array detecting instrument, avoid the probe to rock, guarantee in the detection probe and the face of detection between closely laminating, simplify manual operation flow, improve detection efficiency, the application provides an embodiment of scanning device, refer to fig. 1 and fig. 2, in this embodiment, scanning device specifically contains: the device comprises a frame body 1 provided with a slide rail 2 and at least three rollers 3 and a probe lifting assembly 4 fixed on a rail of the slide rail 2; a probe wedge block 5 is arranged at the bottom of the probe lifting assembly 4, a first through hole 6 for limiting a probe of the phased array detector is formed in the probe wedge block 5, an upper fixing plate 7 is arranged at the top of the probe lifting assembly 4, and at least one spring 8 is arranged on the upper fixing plate 7; one end of the spring 8 is connected with the upper fixing plate 7, the other end of the spring 8 abuts against the lower fixing plate 11, and a vertical downward pressure is applied to the lower fixing plate 11 and the clamping legs 13 when the spring 8 is in a compressed state, so that a probe of the phased array detector is tightly attached to a detection surface of an object to be scanned.

Optionally, the sliding rail 2 disposed on the frame body 1 may be a slidable rail formed by a recessed portion on an i-shaped profile, the probe lifting assembly 4 may be fixed on the sliding rail 2 in a conventional manner and slide along the rail of the sliding rail 2, and meanwhile, the magnitude of the resistance during the sliding may also be controlled by additionally providing a fastening screw.

Optionally, at least three rollers 3, preferably four rollers 3 are disposed on the frame body 1, so as to enhance the stability of the scanning device when disposed on the GIS cylinder.

Optionally, the probe wedge 5 is provided with a first through hole 6 for limiting a probe of the phased array detector extending into the probe wedge, and the shape of the hole of the first through hole 6 may be the same as the shape of the probe, or may be different from the shape of the probe.

Optionally, the top of the probe lifting assembly 4 is provided with an upper fixing plate 7, at least one spring 8 (for example, a spring hook) can be hung on the upper fixing plate 7, preferably, the two springs 8 are provided, after the upper end of the spring 8 is connected and fixed to the upper fixing plate 7, the lower end of the spring 8 can be used to abut against the lower fixing plate 11, and a vertical downward pressure is applied to the lower fixing plate 11 and the clamping legs 13 by thrust generated when the spring 8 is in a compressed state, so that the probe of the phased array detector is tightly attached to the detection surface of the object to be scanned, and further, the detection efficiency and the detection accuracy are improved.

It can be understood that the phased array ultrasonic technology is that a plurality of piezoelectric wafers are distributed and arranged according to a certain rule, then each wafer is excited successively according to a preset delay time, ultrasonic waves emitted by all the wafers form an integral wave front, the shape and the direction of an emitted ultrasonic beam (wave front) can be effectively controlled, and beam scanning, deflection and focusing of the ultrasonic waves can be realized. The electronic method is adopted to control the focusing, deflection and scanning of the acoustic beam, so that the rapid scanning in a large angle range can be realized under the condition of no movement or little movement of the probe, and the detection efficiency is improved; by optimizing and controlling the size of a focus, the depth of a focus area and the direction of a sound beam, the detection resolution, the signal-to-noise ratio, the sensitivity and other properties can be improved, and the tiny change of defects can be distinguished; the phased array technology can realize imaging of various views of the defects, the detection result is visual, and the defects can be conveniently identified and judged. Compared with the conventional ultrasonic detection technology, the phased array ultrasonic technology has higher detection sensitivity on the thin plate and more visual results, the phased array detection is easier to find the optimal angle for detecting the defects, the detection rate of the harmful defects is higher, and more defect characteristics such as the length of the defects and the size in the height direction can be accurately recorded. And the phased array ultrasonic probe does not need to move back and forth, the probe can be guaranteed to be effectively coupled with the GIS shell by customizing the wedge block with the curvature and the scanning device, and the quality of the butt welding seam of the GIS shell can be effectively detected.

As can be seen from the above description, according to the scanning device provided in the embodiment of the present application, the frame body 1 provided with at least three rollers 3 is used to enable the scanning device to move on the detection surface of the object to be scanned conveniently and flexibly, the frame body 1 is also provided with the slide rail 2 so as to enable the probe lifting assembly 4 fixed on the slide rail 2 to move flexibly, the bottom of the probe lifting assembly 4 is provided with the probe wedge 5, the probe wedge 5 is provided with the first through hole 6 so as to limit the probe of the phased array detector extending into the probe wedge 5, the top of the probe lifting assembly 4 is also provided with the upper fixing plate 7, the upper fixing plate 7 is provided with at least one spring 8, wherein one end of the spring 8 is connected with the upper fixing plate 7, and the other end of the spring 8 abuts against the lower fixing plate 11, and when the spring 8 is in a compressed state, a vertical downward pressure is applied to the lower fixing plate 11 and the clamping legs 13, so that a probe of the phased array detector is tightly attached to a detection surface of an object to be scanned, the probe is prevented from shaking, the tight attachment between the probe and the detection surface in the detection process is ensured, the manual operation process is simplified, and the detection efficiency is improved.

Referring to fig. 3, as a preferred embodiment, the probe lifting assembly 4 further includes a first slider fixing plate 9, and a first screw 10 with one end extending into the sliding rail 2 is disposed on the first slider fixing plate 9.

Optionally, the probe lifting assembly 4 can slide along the track of the slide rail 2 by the first screw 10, and meanwhile, the relative position of the probe lifting assembly 4 from the weld joint can also be adjusted by loosening the first screw 10 on the first slider fixing plate 9.

In a preferred embodiment, the probe wedge 5 has a bottom surface (not shown) with a curvature to ensure good probe-to-test surface fit.

Referring to fig. 3, as a preferred embodiment, the probe lifting assembly 4 further includes a lower fixing plate 11 disposed at the bottom for carrying the phased array detector and a guide rail 12 connecting the lower fixing plate 11 and the upper fixing plate 7.

Optionally, the upper fixing plate 7 can be moved up and down by the guide rail 12, so as to adjust the pressure applied by the spring 8 to the phased array probe.

Referring to fig. 3, as a preferred embodiment, the probe lifting assembly 4 further includes a holding frame leg 13 connecting the lower fixing plate 11 and the probe wedge 5, one end of the holding frame leg 13 is connected to the lower fixing plate 11 through a second screw 14 vertically disposed, and a second through hole 15 for limiting the second screw 14 is opened on the lower fixing plate 11.

Optionally, the second screw 14 (together with the clamping frame leg 13) can be horizontally moved through the second through hole 15, so as to drive the probe wedge 5 to horizontally move, and further perform fine position adjustment on the probe wedge 5 and the probe in the probe wedge 5, so that the detection is more accurate and convenient.

Referring to fig. 3, as a preferred embodiment, the other end of the holder leg 13 is connected to the probe wedge 5 by a horizontally disposed third screw 16.

Optionally, the third screw 16 arranged horizontally can realize the rotation motion of the probe wedge 5, so as to perform position fine adjustment on the probe wedge 5 and the probe in the probe wedge 5, so that the detection is more accurate and convenient.

Referring to fig. 4, as a preferred embodiment, the device further comprises a waterway shunting assembly 17 fixed on the frame body 1, wherein the waterway shunting assembly 17 comprises a universal joint 18 for inputting coupling agent and at least one first water pipe joint 19 for outputting coupling agent, the upper end surface of the probe wedge 5 is provided with a second water pipe joint 20 corresponding to the first water pipe joint 19, and the probe wedge 5 is further provided with a third through hole communicating the second water pipe joint 20 and the lower end surface of the probe wedge 5.

Optionally, during the movement of the probe and the probe wedge 5 against the detection surface, in order to protect the equipment from damage, couplant (e.g., water, oil) may be added to the interface, and thus, by providing waterway tap assembly 17, and is connected with an external water source through a universal joint 18 on the waterway shunting assembly 17, specifically, the universal joint 18 is communicated with the first water pipe joint 19, the first water pipe joint 19 can be arranged in one or more, couplant enters the waterway shunting assembly 17 from the universal joint 18, then flows from the one or more first water connections 19 to the second water connection 20 of the probe wedge 5 and further to the lower end face of the probe wedge 5, in particular, the first water connection 19 and the second water connection 20 may be connected by providing a hose.

Optionally, a third through hole (not shown) is further formed through the probe wedge 5, and the coupling agent can flow into a lower end surface (which can also be understood as a detection surface) of the probe wedge 5 through the third through hole, so as to protect the equipment from being damaged.

Referring to fig. 5, as a preferred embodiment, the device further includes an encoder assembly 21 fixed on the track of the slide rail 2, where the encoder assembly 21 includes an encoder roller 223 closely contacting the detection surface of the object to be scanned and an encoder interface 23 for electrically connecting with the phased array detector.

Optionally, when the scanning device operates, the encoder roller 223 rotates under driving, the rotation correspondingly generates a scanning device displacement signal, the scanning device displacement signal is used for representing the operating distance of the scanning device, and the encoder component 21 transmits the scanning device displacement signal to the phased array detector electrically connected with the encoder component through the encoder interface 23, so that the phased array detector can obtain a more accurate detection result according to the scanning device displacement signal (i.e. the operating distance of the scanning device).

Referring to fig. 5, as a preferred embodiment, the encoder assembly 21 further includes a second slider fixing plate 24, and a fourth screw 25 having one end extending into the slide rail 2 is disposed on the second slider fixing plate 24.

Optionally, the fourth screw 25 can be used to displace the encoder assembly 21, so that the scanning operation is more convenient and flexible.

Referring to fig. 1, as a preferred embodiment, the roller 3 is connected with the frame body 1 through a roller locking handle 26, and at least one manual handle 27 is further disposed on the frame body 1, so that the stability of the scanning device during movement is guaranteed, and the detection accuracy is improved.

Referring to fig. 2, as a preferred embodiment, the frame body 1 is formed by connecting 5 h-shaped aluminum alloy sections in a shape of a Chinese character ri.

In order to avoid the probe to rock, guarantee the inseparable laminating between probe and the detection face in the detection, simplify the manual operation flow, improve detection efficiency, this application still provides a phased array ultrasonic testing system's embodiment, in this embodiment, phased array ultrasonic testing system specifically contains: the phased array detector further comprises the scanning device which is used for being connected with the phased array detector and is described above;

the phased array detector is provided with at least two interfaces, wherein one interface is connected with the encoder interface through a transmission line, so that the phased array detector can acquire displacement signals in the detection process; the other interface is connected with the probe through a transmission line, so that the phased array detector can acquire ultrasonic signals inside the welding line in the detection process.

The scanning device moves on an object to be scanned, ultrasonic signals and displacement signals are respectively collected through the probe and the encoder, and the signals are transmitted to the phased array detector through the wiring, so that defect scanning data of the whole welding line length are collected.

Alternatively, the phased array detector may be an existing device capable of ultrasonic testing using a phased array.

As can be seen from the above description, according to the phased array ultrasonic testing system provided by the embodiment of the present application, the frame body 1 provided with at least three rollers 3 is used to enable the scanning device to move on the testing surface of the object to be scanned conveniently and flexibly, the frame body 1 is also provided with the slide rail 2 to enable the probe lifting assembly 4 fixed on the slide rail 2 to move flexibly, the bottom of the probe lifting assembly 4 is provided with the probe wedge 5, the probe wedge 5 is provided with the first through hole 6 to limit the probe of the phased array testing apparatus extending into the probe wedge 5, the top of the probe lifting assembly 4 is also provided with the upper fixing plate 7, the upper fixing plate 7 is provided with at least one spring 8, wherein one end of the spring 8 is connected with the upper fixing plate 7, and the other end of the spring 8 abuts against the lower fixing plate 11, and when the spring 8 is in a compressed state, a vertical downward pressure is applied to the lower fixing plate 11 and the clamping legs 13, so that a probe of the phased array detector is tightly attached to a detection surface of an object to be scanned, the probe is prevented from shaking, the tight attachment between the probe and the detection surface in the detection process is ensured, the manual operation process is simplified, and the detection efficiency is improved.

The above description is only illustrative of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the present application shall fall within the protection scope of the present application.

Claims (14)

1. A scanning device, comprising: the probe lifting assembly comprises a frame main body provided with a slide rail and at least three rollers and a probe lifting assembly fixed on the track of the slide rail;

the bottom of the probe lifting assembly is provided with a probe wedge block, the probe wedge block is provided with a first through hole for limiting a probe of the phased array detector, the top of the probe lifting assembly is provided with an upper fixing plate, and the upper fixing plate is provided with at least one spring;

one end of the spring is connected with the upper fixing plate, the other end of the spring abuts against the lower fixing plate, and a vertical downward pressure is applied to the lower fixing plate and the clamping legs when the spring is in a compressed state, so that a probe of the phased array detector is tightly attached to a detection surface of an object to be scanned.

2. The scanning device according to claim 1, wherein the probe lifting assembly further comprises a first slider fixing plate, and a first screw with one end extending into the sliding rail is arranged on the first slider fixing plate.

3. The scanning device of claim 1, wherein the probe wedge has a bottom surface with a curvature.

4. The scanning device according to claim 1, wherein the probe lifting assembly further comprises a lower fixing plate arranged at the bottom for carrying the phased array detector and a guide rail connecting the lower fixing plate and the upper fixing plate.

5. The scanning device according to claim 4, wherein the probe lifting assembly further comprises a holder leg connecting the lower fixing plate and the probe wedge, and one end of the holder leg is connected with the lower fixing plate through a second screw arranged vertically.

6. The scanning device according to claim 5, wherein the lower fixing plate is provided with a second through hole for limiting the second screw.

7. The scanning device according to claim 5, characterized in that the other end of the holder leg is connected with the probe wedge by a horizontally arranged third screw.

8. The scanning device according to claim 1, further comprising a waterway shunting assembly fixed on the frame body, wherein the waterway shunting assembly comprises a universal joint for inputting coupling agent and at least one first water pipe joint for outputting coupling agent, the upper end face of the probe wedge block is provided with a second water pipe joint corresponding to the first water pipe joint, and the probe wedge block is further provided with a third through hole for communicating the second water pipe joint with the lower end face of the probe wedge block.

9. The scanning device of claim 1, further comprising an encoder assembly fixed on the rail of the slide rail, the encoder assembly including an encoder roller in close contact with the inspection surface of the object to be scanned and an encoder interface for electrical connection with the phased array inspection apparatus.

10. The scanning device according to claim 9, wherein the encoder assembly further comprises a second slider fixing plate, and a fourth screw having one end extending into the slide rail is disposed on the second slider fixing plate.

11. The scanning device of claim 1, wherein the roller is connected to the frame body by a roller lock handle.

12. The scanning device according to claim 1, characterized in that at least one manual handle is also provided on said frame body.

13. The scanning device according to claim 1, wherein the frame body is formed by connecting 5I-shaped aluminum alloy sections in a shape like a Chinese character ri.

14. A phased array ultrasonic inspection system comprising a phased array inspection apparatus, characterised by further comprising scanning apparatus as claimed in any one of claims 1 to 13 for securing the phased array inspection apparatus;

the phased array detector is provided with at least two interfaces, wherein one interface is connected with the encoder interface through a transmission line, so that the phased array detector can acquire displacement signals in the detection process; the other interface is connected with the probe through a transmission line, so that the phased array detector can acquire ultrasonic signals inside the welding line in the detection process.

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