Nuclear power station BOSS head phased array ultrasonic detection device and detection method

Abstract

The invention discloses a nuclear power station BOSS head phased array ultrasonic detection device and method, the detection device comprises a host module, a support arm module and a probe support module, the host module is of a cuboid trolley structure, and a servo stepping motor and an encoder are arranged in the host module; four metal magnetic wheels are arranged at the bottom and are connected with a built-in servo stepping motor and an encoder; the probe support module is arranged on the upper portion of the host module and is of a connecting rod type structure, a probe frame is arranged at one end of the probe support module, and the phased array probe is fixed through the probe frame. The supporting arm modules are arranged on the two sides of the host module, the whole supporting arm modules are of a two-section type adjustable joint structure, and the supporting arm modules are matched with the host module to achieve automatic detection of the surfaces of pipe base supporting pipes of different specifications. By changing the shape of the support arm module, the patent scanning device can be fixed on the outer walls of branch pipes with various pipe diameters, so that the scanning of the phased array probe on the branch pipe side or the mother pipe side is realized; modularized design is adopted, disassembly and assembly are convenient, and later maintenance and upgrading are facilitated.

Description

Technical Field

[0001] The invention relates to a nuclear power plant BOSS head phased array ultrasonic detection device and a detection method, belonging to the field of industrial detection equipment manufacturing. Background Art

[0002] BOSS head is a pipe installation structure that is welded to the main pipe through a machined pipe seat, so that the branch pipe can be connected to the main pipe. The main equipment system of nuclear power plants (RCP, RCV, RIS, RRA and other systems) usually uses a large number of small-sized branch pipe joints (BOSS heads). During their installation and operation stages, leakage accidents frequently occur. Leakage will reduce the power of nuclear power units, increase the fluctuation amplitude, and thus lead to a series of problems such as shutdown, reactor shutdown, and pressure plugging, which will inevitably affect the safe, economical and stable operation of nuclear power plants. Usually, welding defects are one of the reasons for leakage in the BOSS head weld. Common defects include slag inclusion, pores, lack of fusion, and lack of penetration. Therefore, non-destructive testing of BOSS heads is required during manufacturing, installation and maintenance. Timely discovery of defects and elimination of defects is of great significance to ensure the safe and stable operation of the unit. At present, the BOSS head inspection of nuclear power plants usually adopts conventional A-ultrasound or phased array inspection methods, both of which are carried out by inspectors using handheld ultrasonic probes. This detection method has low detection efficiency; the handheld probe cannot ensure uniform probe pressure and coupling, resulting in large changes in detection sensitivity during the scanning process and low detection accuracy; the detection results are greatly affected by human operation methods, and the repeatability of the detection results is poor. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the defects of the prior art and to provide a phased array ultrasonic scanning device and a detection method for a nuclear power plant BOSS head that can realize automatic phased array ultrasonic scanning and detection of special structure workpieces such as pipe socket corner joints, thereby solving the problems of difficulty in implementing manual detection and low detection efficiency and detection accuracy.

[0004] To solve this technical problem, the present invention provides a phased array ultrasonic detection device for a BOSS head of a nuclear power plant, comprising a mainframe module, an arm module and a probe holder module. The mainframe module is a rectangular trolley structure, in which a servo stepper motor and an encoder are arranged. Four metal magnetic wheels are arranged at the bottom, which are connected to the built-in servo stepper motor and the encoder, so as to realize automatic movement and position information collection. A probe holder module is arranged on the upper part of the mainframe module. The probe holder module is a connecting rod structure, one end of which is provided with a probe holder, and the phased array probe is fixed by the probe holder. The arm modules are arranged on both sides of the mainframe module, and the arm modules are a two-stage adjustable joint structure as a whole. The arm modules cooperate with the mainframe module to realize stable rotation of the surface of branch pipes of pipe sockets of different specifications, so as to realize automatic detection of the phased array probe.

[0005] The host module is provided with arm grooves on both sides. The arm modules are fixed in the arm grooves on both sides of the host module through positioning holes and pin shafts. At the same time, the fixation or movement of the arm module is controlled by screwing in or out of a knurled flat head screw, so that the arm module is rotated to a predetermined position along the center of the pin shaft and then fixed, so that different angles are formed between the arm and the host module to adapt to the phased array detection of BOSS heads and tube socket angle joints of different specifications.

[0006] The upper part of the host module is a rectangular parallelepiped with a built-in battery and a control circuit board. A switch button, a USB interface and a data line interface are set on one side. The switch button controls the start and stop of the host module. The USB interface is used for charging the host module and importing program codes. The data line interface is used for data transmission between the host module and the phased array detector.

[0007] The support arm module comprises a forearm and an upper arm, and a knurled flat head screw is arranged at the joint connection between the upper arm and the forearm, and the fixation or rotation of the joint is controlled by screwing in or out of the knurled flat head screw.

[0008] Two metal magnetic wheels are arranged at the front end of the big arm, and the metal magnetic wheels can be adsorbed on the surface of the pipe seat branch pipe to realize flexible rotation.

[0009] The probe bracket module also includes double uprights, a long support arm and a spring support arm. The double uprights and the long support arm are both hollow stainless steel tubes. The two parts are connected by a square fixing frame. The square fixing frame is provided with two knurled flat head screws in two directions for fixing the relative position of the long support arm and the fixing frame.

[0010] The spring support arm shell is a stainless steel tube, and a spring structure is arranged inside the spring support arm. The spring support arm is located at the front end of the long support arm. The spring support arm and the long support arm are connected by a knurled flat head screw to achieve relative rotation or fixation.

[0011] The probe frame is a "U"-shaped support arm, located at the front end of the spring support arm, and connected to the spring support arm through a pin shaft. The spring support arm can realize adjustable scanning pressure of the phased array probe; four knurled flat head screws are provided at the front end of the support arms on both sides of the probe frame, and the phased array probe can be clamped and detached by screwing the four knurled flat head screws in or out.

[0012] The detection device is controlled by a phased array detector or a mobile phone Bluetooth to achieve automatic detection and scanning, and real-time data transmission.

[0013] The present invention also provides a detection method using the above-mentioned nuclear power plant BOSS head phased array ultrasonic detection device, including detecting the outer diameter of the branch pipe of the BOSS head and the main pipe side of the BOSS head, and the detection method steps are as follows:

[0014] (I) Check the branch pipe of BOSS head:

[0015] 1) Measure the outer diameter of the branch pipe of the BOSS head to be inspected, unscrew the knurled flat head screws on both sides of the host module, unscrew the knurled flat head screws at the connection between the forearm and the upper arm, and place the host module on the branch pipe side of the BOSS head, so that the four metal magnetic wheels are in contact with the outer wall of the branch pipe of the BOSS head;

[0016] 2) Adjust the position of the forearm and the upper arm so that the two arms embrace the branch pipe of the BOSS head, and the metal magnetic wheel contacts the outer wall of the branch pipe of the BOSS head, so that the detection device is fixed on the outer wall of the branch pipe of the BOSS head to be tested;

[0017] 3) Place the phased array probe in the center of the "U"-shaped probe holder and secure it;

[0018] 4) Unscrew the two knurled flat head screws 2 and 3 on the probe bracket module, place the phased array probe at the predetermined position on the outer wall of the branch pipe of the BOSS head to be inspected, and screw in the two knurled flat head screws 2 and 3 in sequence to fix the components of the probe bracket module;

[0019] 5) Insert one side of the data cable into the data cable interface, and connect the other side to the data cable interface of the phased array detector. Connect the probe data cable to the probe data cable interface of the phased array detector, set various detection parameters of the phased array detector, press the switch button to start the detection device, the detection device rotates at a constant speed for one circle, and the phased array probe scans along the predetermined track for one circle, thus completing the full coverage detection of the BOSS head under inspection on the branch pipe;

[0020] (II) Test the mother tube of the BOSS head:

[0021] 1) Unscrew the two knurled flat head screws at the front end of the probe holder, turn the phased array probe 180°, and then screw in the two knurled flat head screws to fix the phased array probe;

[0022] 2) Unscrew the third knurled flat head screw and rotate the spring support arm so that the main axis of the spring support arm coincides with the extension direction of the main axis of the long support arm, that is, the spring support arm and the long support arm are adjusted to be in a straight line, and screw the third knurled flat head screw in to fix the spring support arm and the long support arm;

[0023] 3) The other steps are the same as those in working condition (I). The detection device rotates one circle along the branch pipe of the BOSS head under test, and the phased array probe rotates one circle along the predetermined trajectory on the main pipe side of the BOSS head under test, thus completing the full coverage detection of the BOSS head under test on the main pipe.

[0024] Beneficial effects: The present invention can fix the patented scanning device on the outer wall of branch pipes of various diameters by changing the shape of the arm module, thereby realizing circumferential scanning without blind spots; by changing the position and phase relationship of each component of the probe bracket module, the phased array probe can be scanned on the branch pipe side or the main pipe side, meeting various phased array detection processes, one machine for multiple uses, and full coverage of the detection workpiece; the modular design is adopted, and each module is easy to disassemble and assemble, which is convenient for later maintenance and upgrading, and the manufacturing cost and use cost are low. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the structural decomposition of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the host module of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the arm module of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the probe support module of the present invention;

[0030] Figure 6 This is a schematic diagram of the field application of the first working condition of the present invention;

[0031] Figure 7 This is a schematic diagram of the field application of the second working condition of the present invention.

[0032] In the figure: 1. host module; 2. support arm module; 3. probe bracket module; 4. phased array probe; 5. data cable; 6. phased array detector; 7. BOSS head; 11. vehicle body; 12. wheel; 13. support arm slot; 14. positioning hole; 15. switch button; 16. USB interface; 17. data cable interface; 21. small arm; 22. large arm; 23. metal magnetic wheel; 24. knurled flat head screw one; 25. pin; 31. long support arm; 32. fixing bracket; 33. knurled flat head screw two; 34. vertical pole; 35. knurled flat head screw three; 36. spring support arm; 37. probe holder; 38. knurled flat head screw four. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figure 1-Figure 7As shown, the present invention provides a nuclear power plant BOSS head phased array ultrasonic detection device, including a host module 1, an arm module 2 and a probe bracket module 3. The host module 1 is a rectangular trolley structure, a servo stepper motor and an encoder are arranged inside, and four metal magnetic wheels 12 are arranged at the bottom, which are connected to the built-in servo stepper motor and the encoder, and can realize automatic movement and position information collection. The servo stepper motor provides power for the wheel 12, and the encoder synchronously records the travel of the wheel 12, converts it into the position data of the phased array probe 4 and transmits it to the phased array detector for recording in real time; the probe bracket module 3 is arranged on the upper part of the host module 1 for arranging and supporting The phased array probe 4 can realize detection of the phased array probe 4 on the branch pipe side or the main pipe side, and the detection process is flexible and variable; the probe bracket module 3 is a connecting rod structure, one end of which is provided with a probe frame 37, and the phased array probe 4 is fixed by the probe frame 37; the support arm module 2 is arranged on both sides of the main module 1, and the left and right structures are symmetrical, which is used to support and fix the main module 1, so as to perform phased array detection of nuclear power BOSS heads and pipe socket angle joints of different specifications; the support arm module 2 is a two-stage adjustable joint structure as a whole, and the support arm module 2 cooperates with the main module 1 to realize stable rotation of the surface of pipe socket branches of different specifications, so as to realize automatic detection of the phased array probe 4.

[0035] The host module 1 is provided with arm grooves 13 on both sides, and the arm module 2 is fixed in the arm grooves 13 on both sides of the host module 1 through positioning holes 14 and pin shafts 25. At the same time, the fixation or movement of the arm module 2 is controlled by screwing in or out of a knurled flat head screw 24, so that the arm module 2 is rotated to a predetermined position along the center of the pin shaft 25 and then fixed, so that different angles are formed between the arm and the host module to adapt to the phased array detection of BOSS heads and tube socket angle joints of different specifications.

[0036] The upper part of the host module 1 is a rectangular parallelepiped with a built-in battery and a control circuit board. A switch button 15, a USB interface 16 and a data line interface 17 are arranged on one side. The switch button 15 controls the start and stop of the host module 1. The USB interface 16 is used for charging the host module 1 and importing program codes. The data line interface 17 is used for data transmission between the host module 1 and the phased array detector 6, which is convenient for field and installation site detection and can also realize automatic or manual detection.

[0037] The support arm module 2 includes a forearm 21 and an upper arm 22. A knurled flat head screw is provided at the joint connection between the upper arm 22 and the forearm 21. The fixation or rotation of the joint is controlled by screwing the knurled flat head screw in or out. The relative position of the forearm and the upper arm can be adjusted according to the outer diameter of the workpiece to be inspected, so that the main unit module can be encircled and fixed on the outer wall of the workpiece to be inspected.

[0038] Two metal magnetic wheels 23 are arranged at the front end of the large arm 22. The metal magnetic wheels 23 can be adsorbed on the surface of the pipe seat branch pipe to realize flexible rotation. When used in conjunction with the four metal magnetic wheels 12 of the host module 1, the scanning device can realize stable and accurate circumferential movement.

[0039] The probe support module 3 also includes a double upright pole 34, a long support arm 31 and a spring support arm 36. The double upright pole 34 and the long support arm 31 are both hollow stainless steel tubes, and the two parts are connected by a square fixing frame 32. The square fixing frame 32 is provided with two knurled flat head screws 33 in two directions for fixing the relative positions of the long support arm 31 and the fixing frame 32; the double upright pole 34 is connected to the long support arm 31 through the fixing frame 32, so that the long support arm 31 can move up and down along the double upright pole 34, and can also realize the long support arm 31 to move left and right.

[0040] The shell of the spring support arm 36 is a stainless steel tube with a spring structure arranged inside. The spring support arm 36 is located at the front end of the long support arm 31. The spring support arm 36 and the long support arm 31 are connected by a knurled flat head screw 35. The long support arm 31 can form an angular phase relationship with the spring support arm 36, so that relative rotation or fixation can be achieved.

[0041] The probe frame 37 is a "U"-shaped support arm, located at the front end of the spring support arm 36, and connected to the spring support arm 36 through a pin shaft. The spring support arm 36 can realize adjustable pressure of phased array probe scanning; knurled flat head screws 38 are provided at the front ends of the arms on both sides of the probe frame 37, and the phased array probe can be clamped and detached by screwing the knurled flat head screws 38 in or out.

[0042] The detection device is controlled by a phased array detector or a mobile phone Bluetooth to achieve automatic detection and scanning, and real-time data transmission.

[0043] The present invention also provides a detection method using the above-mentioned nuclear power plant BOSS head phased array ultrasonic detection device, including detecting the branch pipe of the BOSS head 7 and the main pipe of the BOSS head 7, and the detection method steps are as follows:

[0044] (I) Test the branch pipe of BOSS head 7:

[0045] 1) Measure the outer diameter of the branch pipe of the BOSS head 7 to be inspected, unscrew the knurled flat head screws 24 on both sides of the host module 1, unscrew the knurled flat head screws at the connection between the small arm 21 and the large arm 22, and place the host module 1 on the branch pipe side of the BOSS head 7, so that the four metal magnetic wheels 12 are in contact with the outer wall of the branch pipe of the BOSS head 7;

[0046] 2) Adjust the positions of the small arm 21 and the large arm 22 so that the two arms embrace the branch pipe of the BOSS head 7, and the metal magnetic wheel 23 contacts the outer wall of the branch pipe of the BOSS head 7, and then screw in the knurled flat head screws 24 of the arm modules 2 on both sides in turn, screw in the knurled flat head screws at the connection between the small arm 21 and the large arm 22 of the arm modules 2 on both sides, fix the joints of the arm modules 2 on both sides, and fix the detection device on the outer wall of the branch pipe of the BOSS head 7 to be detected;

[0047] 3) Place the phased array probe 4 in the center of the "U"-shaped probe holder 37, and screw in the knurled flat head screws 38 on both sides to fix the phased array probe 4;

[0048] 4) Unscrew the two knurled flat head screws 2 33 and the knurled flat head screw 3 35 on the probe bracket module 3, so that each component can rotate freely. According to the phased array detection process requirements, place the phased array probe 4 at the predetermined position on the outer wall of the branch pipe of the BOSS head 7 to be inspected, and screw in the two knurled flat head screws 2 33 and the knurled flat head screw 3 35 in turn to fix each component of the probe bracket module 3;

[0049] 5) Insert one side of the data line 5 into the data line interface 17, and connect the other side to the data line interface of the phased array detector 6, connect the probe data line 5 to the probe data line interface of the phased array detector 6, set various detection parameters of the phased array detector 6, press the switch button 15 to start the detection device, the detection device rotates at a constant speed for one circle, and the phased array probe 4 scans one circle along the predetermined track, thus completing the full coverage detection of the BOSS head 7 under inspection on the branch pipe;

[0050] (II) Test the mother tube of BOSS head 7:

[0051] 1) Unscrew the two knurled flat head screws 438 at the front end of the probe holder 37, turn the phased array probe 4 180°, and then screw in the two knurled flat head screws 438 to fix the phased array probe 4;

[0052] 2) Unscrew the knurled flat head screw 35, rotate the spring support arm 36, make the main axis of the spring support arm 36 coincide with the extension direction of the main axis of the long support arm 31, that is, adjust the spring support arm 36 and the long support arm 31 to be in a straight line, screw in the knurled flat head screw 35, fix the spring support arm 36 and the long support arm 31;

[0053] 3) The other steps are the same as those in working condition (I). The detection device rotates one circle along the branch pipe of the BOSS head 7 under test, and the phased array probe 4 rotates one circle along the predetermined trajectory on the main pipe side of the BOSS head 7 under test, thus completing the full coverage detection of the BOSS head 7 under test on the main pipe.

[0054] The present invention is specially designed for phased array detection of structural components of pipe socket corner joints. By changing the position and phase relationship between the components of the probe bracket module, the detection process and detection working condition changes can be quickly realized, and the phased array probe can be conveniently scanned on the branch pipe side or the main pipe side of the BOSS head, which can meet the full coverage scanning process of the BOSS head or pipe socket corner joints; each module device is small in size and battery-powered, easy to carry, and has a wide range of applications. It is suitable for phased array ultrasonic detection of various pipe socket corner joints, especially for phased array detection of BOSS heads in nuclear power plants, with a wide range of applications, easy operation and reliable performance; built-in control circuit board and chip, with wireless control function, detection personnel can remotely control it on a laptop or smart phone, the detection parameters are accurately controlled, the detection accuracy is high, and it matches the use of various phased array detection instruments on the market.

[0055] The present invention has a modular design, manual and automatic integration, and variable working conditions. It is suitable for various specifications of pipe socket angle joints, and is particularly suitable for phased array detection of BOSS heads of nuclear power plants of various specifications. By changing the shape of the support arm module, the patented scanning device can be fixed on the outer wall of branch pipes of various pipe diameters to achieve circumferential scanning without dead angles. It can conveniently and efficiently realize phased array ultrasonic detection of BOSS heads of nuclear power plants and various types of pipe socket angle joints. It has fast detection speed and high detection accuracy, is suitable for various specifications of pipe diameters, and is a set of intelligent scanning devices.

[0056] The invention has a compact structure, adopts a modular design, is easy to assemble and disassemble, is convenient for later maintenance and upgrading, and has low manufacturing cost and use cost.

[0057] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A nuclear power plant BOSS head phased array ultrasonic detection device, characterized in that: The invention comprises a host module (1), an arm module (2) and a probe support module (3); the host module (1) is a rectangular trolley structure, a servo stepper motor and an encoder are arranged inside, and four metal magnetic wheels (12) are arranged at the bottom, which are connected to the built-in servo stepper motor and the encoder, so as to realize automatic movement and position information collection; a probe support module (3) is arranged on the upper part of the host module (1); the probe support module (3) is a connecting rod structure, one end of which is provided with a probe frame (37), and the phased array probe (4) is fixed by the probe frame (37); the arm module (2) is arranged on both sides of the host module (1), and the arm module (2) is a two-stage adjustable joint structure as a whole. The arm module (2) cooperates with the host module (1) to realize stable rotation of the surface of the pipe socket branch of different specifications, so as to realize automatic detection of the phased array probe (4).

2. The nuclear power plant BOSS head phased array ultrasonic detection device according to claim 1, characterized in that: The host module (1) is provided with support arm grooves (13) on both sides, and the support arm module (2) is fixed in the support arm grooves (13) on both sides of the host module (1) through positioning holes (14) and pins (25). At the same time, the support arm module (2) is fixed or moved by screwing in or out a knurled flat head screw (24), so that the support arm module (2) is rotated to a predetermined position along the center of the pin (25) and then fixed, so that different angles are formed between the support arm and the host module (1), so as to adapt to phased array detection of BOSS heads and tube socket angle joints of different specifications.

3. The nuclear power plant BOSS head phased array ultrasonic detection device according to claim 2 is characterized in that: The upper part of the host module (1) is a rectangular parallelepiped, with a built-in battery and a control circuit board, and one side is provided with a switch button (15), a USB interface (16) and a data line interface (17), the switch button (15) controls the start and stop of the host module (1), the USB interface (16) is used for charging the host module (1) and importing program codes, and the data line interface (17) is used for data transmission between the host module (1) and the phased array detector (6).

4. The nuclear power plant BOSS head phased array ultrasonic detection device according to claim 1, characterized in that: The arm module (2) comprises a forearm (21) and an upper arm (22); a knurled flat head screw is provided at the joint connection between the upper arm (22) and the forearm (21); the fixing or rotation of the joint is controlled by screwing the knurled flat head screw in or out.

5. The nuclear power plant BOSS head phased array ultrasonic detection device according to claim 4, characterized in that: Two metal magnetic wheels (23) are arranged at the front end of the large arm (22); the metal magnetic wheels (23) can be adsorbed on the surface of the pipe seat branch pipe to realize flexible rotation.

6. The nuclear power plant BOSS head phased array ultrasonic detection device according to claim 1, characterized in that: The probe support module (3) further comprises a double upright pole (34), a long support arm (31) and a spring support arm (36); the double upright pole (34) and the long support arm (31) are both hollow stainless steel tubes, and the two parts are connected by a square fixing frame (32); the square fixing frame (32) is provided with two knurled flat head screws (33) in two directions for fixing the relative positions of the long support arm (31) and the fixing frame (32).

7. The nuclear power plant BOSS head phased array ultrasonic detection device according to claim 6, characterized in that: The outer shell of the spring support arm (36) is a stainless steel tube, and a spring structure is arranged inside the spring support arm (36). The spring support arm (36) is located at the front end of the long support arm (31). The spring support arm (36) and the long support arm (31) are connected by a knurled flat head screw (35) to achieve relative rotation or fixation.

8. The nuclear power plant BOSS head phased array ultrasonic detection device according to claim 6, characterized in that: The probe frame (37) is a "U"-shaped support arm, located at the front end of the spring support arm (36), and connected to the spring support arm (36) through a pin shaft (25). The spring support arm (36) can realize adjustable pressure of phased array probe scanning; four knurled flat head screws (38) are arranged at the front ends of the support arms on both sides of the probe frame (37), and the phased array probe (4) can be clamped or detached by screwing the four knurled flat head screws (38) in or out.

9. The nuclear power plant BOSS head phased array ultrasonic detection device according to any one of claims 1 to 8, characterized in that: The detection device is controlled by a phased array detector or a mobile phone Bluetooth to achieve automatic detection and scanning, and real-time data transmission.

10. A detection method using the phased array ultrasonic detection device for a nuclear power plant BOSS head according to any one of claims 1 to 9, comprising detecting the outer diameter of the branch pipe of the BOSS head (7) and the main pipe side of the BOSS head (7), characterized in that: The detection method steps are as follows: (I) Testing the branch pipes of the BOSS head (7): 1) Measure the outer diameter of the branch pipe of the BOSS head (7) to be inspected, unscrew one of the knurled flat head screws (24) on both sides of the host module (1), unscrew the knurled flat head screw at the connection between the small arm (21) and the large arm (22), and place the host module (1) on the branch pipe side of the BOSS head (7), so that the four metal magnetic wheels (12) are in contact with the outer wall of the branch pipe of the BOSS head (7); 2) adjusting the positions of the small arm (21) and the large arm (22) so that the two arms embrace the branch pipe of the BOSS head (7), the metal magnetic wheel (23) contacts the outer wall of the branch pipe of the BOSS head (7), and the detection device is fixed on the outer wall of the branch pipe of the BOSS head (7) to be detected; 3) placing the phased array probe (4) at the center of the "U"-shaped probe frame (37) and fixing it; 4) Unscrew the two knurled flat head screws 2 (33) and the knurled flat head screw 3 (35) on the probe support module (3), place the phased array probe (4) at a predetermined position on the outer wall of the branch pipe of the BOSS head (7) to be inspected, and screw in the two knurled flat head screws 2 (33) and the knurled flat head screw 3 (35) in sequence to fix the components of the probe support module (3); 5) Insert one side of the data line (5) into the data line interface (17), and connect the other side to the data line interface (17) of the phased array detector (6), connect the probe data line (5) to the probe data line interface (17) of the phased array detector (6), set various detection parameters of the phased array detector (6), press the switch button (15) to start the detection device, the detection device rotates at a constant speed for one circle, and the phased array probe (4) scans one circle along the predetermined track, thus completing the full coverage detection of the BOSS head (7) under inspection on the branch pipe; (ii) Testing the mother tube of the BOSS head (7): 1) Unscrew the two knurled flat head screws (38) at the front end of the probe holder (37), turn the phased array probe (4) 180 degrees, and then screw in the two knurled flat head screws (38) to fix the phased array probe (4); 2) Unscrew the knurled flat head screw three (35), rotate the spring support arm (36), make the main axis of the spring support arm (36) coincide with the extension direction of the main axis of the long support arm (31), that is, adjust the spring support arm (36) and the long support arm (31) to be in a straight line, screw in the knurled flat head screw three (35), and fix the spring support arm (36) and the long support arm (31); 3) The other steps are the same as those in working condition (I). The detection device rotates one circle along the BOSS head (7) under test on the branch pipe, and the phased array probe (4) rotates one circle along the predetermined trajectory on the main pipe side of the BOSS head (7) under test, thus completing the full coverage detection of the BOSS head (7) under test on the main pipe.

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