Ultrasonic detection device for connecting pipe

Abstract

The invention belongs to the technical field of ultrasonic detection, and discloses a connecting pipe ultrasonic detection device, which comprises an ultrasonic detection probe, a probe frame, an opening and closing mechanism, a guide head and a moving mechanism, and is characterized in that the ultrasonic detection probe is arranged on the probe frame; the opening and closing mechanism comprises a driving piece, and the driving piece is in transmission connection with the probe frame and used for controlling the probe frame to be opened or closed; the driving piece is connected with the guide head; the probe frame is arranged on one side of the guide head; the moving mechanism is arranged on the side, away from the probe frame, of the guide head, and the moving mechanism and the guide head are coaxially arranged. Thus, the guide head can support the probe frame and drive the probe frame to move in the connecting pipe, and the driving piece can drive the probe frame to be folded so that the ultrasonic detection probe can move in the connecting pipe, and when ultrasonic detection is conducted on a target scanning area on the inner wall of the connecting pipe, the driving piece drives the probe frame to be unfolded and enables the ultrasonic detection probe to be tightly attached to the inner wall of the connecting pipe. The flexibility and the adaptability of the ultrasonic detection probe are improved, so that the coverage rate of a scanning area and the scanning efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic detection, and in particular to a pipe ultrasonic detection device. Background Art

[0002] Ultrasonic testing is a method of inspecting the surface and internal quality of the inspected parts, and is widely used in pipeline defect detection.

[0003] The reactor pressure vessel is the second barrier to prevent the escape of radioactive materials. Its structural integrity is crucial to the safe operation of the reactor pressure vessel. Therefore, it is necessary to regularly use the nozzle ultrasonic detection device to carry out preventive defect detection on the welds connecting the nozzle and the cylinder and the inner fillet area of ​​the nozzle transition.

[0004] The ultrasonic detection device for the connecting pipe includes a probe and a moving mechanism. Since the diameter of the connecting pipe opening is small, the moving mechanism that carries the ultrasonic probe into the interior of the connecting pipe is relatively simple. It is difficult to control the ultrasonic probe to move circumferentially and axially inside the connecting pipe while continuously abutting against the inner wall of the connecting pipe. There is a problem of poor flexibility and adaptability of the ultrasonic probe inside the connecting pipe, resulting in low coverage of the scanning area and scanning efficiency. Summary of the invention

[0005] The object of the present invention is to provide a connecting pipe ultrasonic detection device to solve the problem that the flexibility and adaptability of the ultrasonic probe inside the connecting pipe are poor.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A takeover ultrasonic detection device comprises: an ultrasonic detection probe; a probe frame, the ultrasonic detection probe is arranged on the probe frame; an opening and closing mechanism, the opening and closing mechanism comprises a driving member, the driving member is transmission-connected to the probe frame and is used to control the opening or closing of the probe frame; a guide head, the driving member is connected to the guide head, the probe frame is arranged on one side of the guide head; a moving mechanism, the moving mechanism is arranged on a side of the guide head away from the probe frame, and the moving mechanism is coaxially arranged with the guide head.

[0008] Preferably, the opening and closing mechanism also includes a center knot and a connecting rod assembly, the driving member is connected to the center knot, and is used to drive the center knot to move axially, the probe frame includes an outer frame and a wedge block, the outer frame is transmission-connected to the connecting rod assembly so that when the center knot moves axially, the outer frame moves in a direction close to or away from the axis of the center knot, the wedge block is arranged on the outer frame, and the ultrasonic detection probe is arranged on the wedge block.

[0009] Preferably, the connecting rod assembly comprises a support arm and a rotating arm, one end of the support arm is hinged to the guide head, and the rotating arm is hinged to an end of the support arm away from the guide head, the center knot, and the probe frame.

[0010] Preferably, one center knot is provided, the center knot is coaxially arranged with the guide head, and multiple probe racks are provided, and the multiple probe racks are circumferentially evenly spaced at the center knot; and / or at least two ultrasonic detection probes are provided on the probe rack.

[0011] Preferably, the probe frame further comprises a bracket, the bracket is connected with a rotating shaft, the rotating shaft is connected with the outer frame so that the bracket rotates around the rotating shaft, a torsion spring is arranged on the rotating shaft, and the wedge block is drivingly connected with the bracket.

[0012] Preferably, the probe frame further comprises a connecting arm, one end of which is rotatably connected to the bracket and the other end is hinged to the wedge block, and the axis of rotation of the connecting arm around the bracket is arranged at an angle to the axis of rotation of the wedge block around the connecting arm.

[0013] Preferably, a limit member is provided on the bracket, and the limit member can selectively abut against the connecting arm to limit an upper limit of a rotation angle of the connecting arm toward one end of the bracket.

[0014] Preferably, the connecting pipe ultrasonic detection device also includes an extension tube, one end of which is connected to the moving mechanism, and the other end is connected to the guide head, the driving member is connected to a mounting frame, and the mounting frame is connected to the guide head, and the extension tube and the mounting frame are both coaxially arranged with the guide head.

[0015] Preferably, the guide head is connected to a first fixing member, which is connected to both the guide head and the extension tube to limit the relative position of the guide head and the extension tube; and / or, the guide head is connected to a second fixing member, which is connected to both the guide head and the mounting frame to limit the relative position of the guide head and the mounting frame.

[0016] Preferably, the cross-sectional area of ​​the guide head gradually decreases along a direction approaching the probe frame.

[0017] Beneficial effects of the present invention:

[0018] A pipe ultrasonic detection device comprises an ultrasonic detection probe, a probe frame, an opening and closing mechanism, a guide head and a moving mechanism, wherein the ultrasonic detection probe is arranged on the probe frame; the opening and closing mechanism comprises a driving member, which is transmission-connected to the probe frame and is used to control the opening or closing of the probe frame; the driving member is connected to the guide head, and the probe frame is arranged on one side of the guide head; the moving mechanism is arranged on a side of the guide head away from the probe frame, and the moving mechanism and the guide head are coaxially arranged.

[0019] In this way, the guide head can support and carry the probe frame, and the opening and closing mechanism is driven by the driving member to open or close the probe frame as needed. The folded probe frame can be convenient for moving inside the connecting pipe, and the opened probe frame can make the ultrasonic detection probe abut against the inner wall of the connecting pipe, thereby avoiding separation of the ultrasonic detection probe from the inner wall of the connecting pipe due to changes in the internal shape of the connecting pipe, thereby improving the flexibility and adaptability of the ultrasonic detection probe inside the connecting pipe, thereby improving the coverage rate of the scanning area and the scanning efficiency, and improving the accuracy of the ultrasonic detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of a take-over ultrasonic detection device in one embodiment of the present invention;

[0021] Figure 2 is a first cross-sectional view of a pipe-connected ultrasonic detection device according to an embodiment of the present invention;

[0022] Figure 3 It is a partial front view of a pipe-connected ultrasonic detection device in one embodiment of the present invention;

[0023] Figure 4 is a partial cross-sectional view of an opening and closing mechanism in one embodiment of the present invention;

[0024] Figure 5 is a second cross-sectional view of a connecting pipe ultrasonic detection device according to an embodiment of the present invention;

[0025] Figure 6 is a schematic structural diagram of a probe frame in one embodiment of the present invention;

[0026] Figure 7 1 is a cross-sectional view of a probe holder in an embodiment of the present invention.

[0027] In the figure:

[0028] 1. Probe frame; 11. Outer frame; 12. Wedge block; 121. First connecting member; 122. Second connecting member; 13. Bracket; 131. Rotating shaft; 132. Limiting member; 14. Connecting arm; 141. First rotating pin; 142. Second rotating pin; 2. Opening and closing mechanism; 21. Driving member; 211. Mounting frame; 212. Mounting nut; 22. Center knot; 23. Connecting rod assembly; 231. Support arm; 232. Rotating arm; 2321. First part; 2322. Second part; 2323. Third part; 3. Guide head; 31. First fixing member; 32. Second fixing member; 4. Moving mechanism; 5. Extension tube. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] See also Figure 1 and Figure 2 The present invention provides a pipe ultrasonic detection device, comprising an ultrasonic detection probe (not shown in the figure), a probe holder 1, an opening and closing mechanism 2, a guide head 3 and a moving mechanism 4, wherein the ultrasonic detection probe is arranged on the probe holder 1; the opening and closing mechanism 2 comprises a driving member 21, which is transmission-connected with the probe holder 1 and used to control the probe holder 1 to open or close (that is, when the probe holder 1 is located inside the pipe, the driving member 21 can drive the probe holder 1 and the ultrasonic detection probe to move toward or away from the inner wall of the pipe); the driving member 21 is connected to the guide head 3, and the probe holder 1 is arranged on one side of the guide head 3; the moving mechanism 4 is arranged on the side of the guide head 3 away from the probe holder 1, and the moving mechanism 4 is coaxially arranged with the guide head 3. In this embodiment, the ultrasonic detection probe is detachably arranged on the probe holder 1, and the driving member 21 is arranged inside the guide head 3.

[0034] In this way, the guide head 3 can play the role of supporting and carrying the probe frame 1, and the opening and closing mechanism 2 can realize the transmission of motion, so that the probe frame 1 is easy to open or close; the ultrasonic detection probe is assembled to the probe frame 1, and the guide head 3 is extended into the inside of the connecting pipe, so that the driving member 21 can drive the probe frame 1 and the ultrasonic detection probe to open or close according to the situation. For example, when the ultrasonic detection probe needs to be moved inside the connecting pipe, the probe frame 1 can be closed to facilitate the probe frame 1 and the ultrasonic detection probe to move smoothly inside the connecting pipe. When it is necessary to perform ultrasonic detection on the target scanning area of ​​the inner wall of the connecting pipe, the driving member 21 can drive the probe frame 1 to open and make the ultrasonic detection probe abut against the inner wall of the connecting pipe to complete the detection work, thereby avoiding the situation that the ultrasonic detection probe is difficult to maintain abutment with the inner wall of the connecting pipe or collides with the inner wall of the connecting pipe during movement, thereby improving the flexibility and adaptability of the ultrasonic detection probe inside the connecting pipe, thereby improving the scanning area coverage and scanning efficiency.

[0035] It should be noted that the manner in which the moving mechanism 4 drives the guide head 3 and the probe frame 1 to move axially and circumferentially inside the pipe can be referred to in the prior art and will not be elaborated herein.

[0036] See also Figure 2 In some embodiments, the opening and closing mechanism 2 also includes a center knot 22 and a connecting rod assembly 23. The driving member 21 is connected to the center knot 22 for driving the center knot 22 to move axially. The probe frame 1 includes an outer frame 11 and a wedge 12. The outer frame 11 is transmission-connected to the connecting rod assembly 23 so that when the center knot 22 moves axially, the outer frame 11 moves in a direction close to or away from the axis of the center knot 22. The wedge 12 is arranged on the outer frame 11, and the ultrasonic detection probe is arranged on the wedge 12.

[0037] In this embodiment, the driving member 21 is a cylinder, which is coaxially arranged with the guide head 3. The fixed end of the cylinder is fixedly connected to the guide head 3. The center knot 22 is fixedly connected to the output end of the cylinder. The cross-sectional area of ​​the end of the center knot 22 facing the guide head 3 is smaller than the cross-sectional area of ​​the end away from the guide head 3. The connecting rod assembly 23 is connected to the end of the center knot 22 away from the guide head 3. The wedge block 12 is arranged one by one with the ultrasonic detection probe.

[0038] In this way, when the probe holder 1 is located inside the connecting pipe, by making the output end of the cylinder move axially and making the connecting rod assembly 23 drive the outer frame 11 to open or close, the ultrasonic detection probe can always abut against the inner wall of the connecting pipe when the outer frame 11 is opened, so as to facilitate the control of the movement of the ultrasonic detection probe inside the connecting pipe and improve the flexibility and adaptability of the ultrasonic detection probe.

[0039] It is understandable that the driving member 21 may also be other linear driving devices and is not limited to a cylinder, and no further examples are given here.

[0040] See also Figure 2 and Figure 3 In some embodiments, the ultrasonic detection device further includes an extension tube 5, one end of the extension tube 5 is connected to the moving mechanism 4, and the other end is connected to the guide head 3. The driving member 21 is connected to a mounting frame 211, and the mounting frame 211 is connected to the guide head 3. The extension tube 5 and the mounting frame 211 are both coaxially arranged with the guide head 3.

[0041] In this embodiment, the mounting frame 211 is detachably connected to the driving member 21 and the guide head 3. The mounting frame 211 is arranged at the end of the guide head 3 facing the probe frame 1 and is arranged inside the guide head 3. The fixed end of the driving member 21 is provided with a mounting nut 212. The mounting frame 211 is threadedly connected to the mounting nut 212 to limit the position of the driving member 21 in the guide head 3. The mounting frame 211 is provided with a hole (not shown in the figure) for the output end of the driving member 21 to extend out, so that the central axis of the driving member 21 is colinear with the central axis of the guide head 3, and the mounting frame 211 is hinged to the connecting rod assembly 23.

[0042] In this way, the extension tube 5 can connect the moving mechanism 4 with the guide head 3, thereby expanding the reach of the ultrasonic detection device for the pipe connection. The drive member 21 is arranged inside the guide head 3 through the mounting frame 211, which not only makes the overall structure of the ultrasonic detection device for the pipe connection more compact, but the guide head 3 and the extension tube 5 can also protect the drive member 21, thereby preventing the drive member 21 from colliding with the inner wall of the pipe connection when moving inside the pipe connection, thereby affecting the flatness of the inner wall of the pipe connection, and enabling the ultrasonic detection probe to move stably, thereby improving the coverage rate of the scanning area and the scanning efficiency.

[0043] It is understandable that the extension tube 5 is a retractable pipe, such as a bellows, and the specific structure of the extension tube 5 can be flexibly adjusted according to actual needs, which will not be listed in detail here.

[0044] See also Figure 2 In some embodiments, the guide head 3 is connected to a first fixing member 31 and a second fixing member 32. The first fixing member 31 is connected to both the guide head 3 and the extension tube 5 to limit the relative position of the guide head 3 and the extension tube 5. The second fixing member 32 is connected to both the guide head 3 and the mounting frame 211 to limit the relative position of the guide head 3 and the mounting frame 211.

[0045] In this embodiment, the first fixing member 31 and the second fixing member 32 are both hexagon socket screws, and the length directions of the first fixing member 31 and the second fixing member 32 are both perpendicular to the axis of the guide head 3 .

[0046] In this way, the guide head 3 can be detachably connected to the extension tube 5 and the mounting frame 211 respectively, so that the guide head 3, the probe frame 1 and the ultrasonic detection probe can be removed from the extension tube 5 for maintenance or replacement of guide heads 3 and probe frames 1 of different specifications according to different specifications of connecting pipes.

[0047] It is understandable that the first fixing member 31 and the second fixing member 32 can also be pins, hexagonal screws and other devices, and are not limited to hexagonal screws. They can limit the position of the extension tube 5 and the mounting frame 211 on the guide head 3, which will not be elaborated here.

[0048] See also Figure 2 In some embodiments, the connecting rod assembly 23 includes a support arm 231 and a rotating arm 232, one end of the support arm 231 is hinged to the guide head 3, and the rotating arm 232 is hinged to the end of the support arm 231 away from the guide head 3, the center knot 22, and the probe frame 1.

[0049] Among them, see Figure 2 and Figure 4 The rotating arm 232 includes a first part 2321, a second part 2322 and a third part 2323. The support arm 231 is a straight rod structure. One end of the support arm 231 is hinged to the mounting frame 211 through a rotating pin to achieve relative rotation with the guide head 3. The other end of the support arm 231 is hinged to the first part 2321 of the rotating arm 232 through a rotating pin. The second part 2322 of the rotating arm 232 is hinged to the center knot 22 through a rotating pin. Two third parts 2323 of the rotating arm 232 are provided. The two third parts 2323 are hinged to the two sides of the outer frame 11. The first part 2321 is provided between the second part 2322 and the third part 2323.

[0050] In this way, driven by the driving member 21, the center knot 22 moves axially and drives the support arm 231 and the rotating arm 232 to rotate, thereby driving the outer frame 11 to open or close, so as to facilitate the control of the ultrasonic detection probe in the narrow area inside the pipe, thereby improving the flexibility and adaptability of the ultrasonic detection probe.

[0051] It can be understood that the third part 2323 of the rotating arm 232 can also be fixedly connected to the outer frame 11 or detachably connected by bolts. In this embodiment, the third part 2323 of the rotating arm 232 is hinged to the outer frame 11 to facilitate the movement of the ultrasonic detection probe more flexible, so that it can maintain contact with the inner wall of the connecting pipe during detection.

[0052] See also Figure 2 and Figure 5 In some embodiments, a center knot 22 is provided, the center knot 22 is coaxially arranged with the guide head 3, a plurality of probe holders 1 are provided, and the plurality of probe holders 1 are circumferentially evenly spaced at the center knot 22; at least two ultrasonic detection probes are provided on the probe holder 1.

[0053] In this embodiment, one driving member 21 is provided, and the probe frame 1 and the connecting rod assembly 23 are arranged in one-to-one correspondence, and three probe frames 1 and three connecting rod assemblies 23 are provided. One end of the three support arms 231 on the same side is hinged to the mounting frame 211, and two ultrasonic detection probes are correspondingly arranged on one probe frame 1. The two ultrasonic detection probes are respectively arranged at both ends of the outer frame 11, and the two ultrasonic detection probes are symmetrically arranged, so as to improve the accuracy, stability and detection efficiency of the detection operation.

[0054] In this way, multiple ultrasonic detection probes can be set on a guide head 3. Under the action of the moving mechanism 4, multiple groups of ultrasonic detection probes can comprehensively scan the inner wall of the connecting pipe, and a driving member 21 can drive the three probe frames 1 to open and close synchronously, thereby improving the flexibility of the ultrasonic detection probe inside the connecting pipe, facilitating the ultrasonic detection probe to abut against the inner wall of the connecting pipe, and improving the scanning area coverage and scanning efficiency.

[0055] It is understandable that two, four or five probe racks 1 may be provided on a guide head 3, and only one ultrasonic detection probe may be provided on a probe rack 1. The number of probe racks 1 and the number of ultrasonic detection probes may be adjusted according to actual needs and are not listed here.

[0056] See also Figure 6 and Figure 7 In some embodiments, the probe frame 1 further includes a bracket 13, the bracket 13 is connected to a rotating shaft 131, the rotating shaft 131 is connected to the outer frame 11 so that the bracket 13 rotates around the rotating shaft 131, a torsion spring (not shown in the figure) is provided on the rotating shaft 131, and the wedge block 12 is transmission-connected to the bracket 13.

[0057] In this embodiment, one end of the bracket 13 is hinged to the outer frame 11, and the other end is connected to the wedge block 12. The bracket 13 and the ultrasonic detection probe are arranged in a one-to-one correspondence. The two brackets 13 are respectively arranged at the two ends of the outer frame 11, and the two ultrasonic detection probes are respectively arranged at the ends of the two brackets 13 close to each other. A torsion spring is correspondingly arranged on each rotating shaft 131, and the torsion spring is coaxially arranged with the rotating shaft 131. The two force arms of the torsion spring are in contact with the bracket 13 and the outer frame 11 respectively, and provide fitting pressure to the bracket 13, the wedge block 12 and the ultrasonic detection probe.

[0058] In this way, the wedge block 12 can be subjected to the force of the torsion spring, so that when the driving member 21 drives the outer frame 11 to open, the ultrasonic detection probe is always in contact with the inner wall of the connecting pipe, thereby improving the flexibility and adaptability of the ultrasonic detection probe inside the connecting pipe, thereby improving the scanning area coverage and scanning efficiency.

[0059] See also Figure 7 In some embodiments, the probe holder 1 further comprises a connecting arm 14, one end of the connecting arm 14 is rotatably connected to the bracket 13, and the other end is hinged to the wedge 12, and the axis of rotation of the connecting arm 14 around the bracket 13 is set at an angle to the axis of rotation of the wedge 12 around the connecting arm 14.

[0060] Among them, a first rotating pin 141 is provided at one end of the connecting arm 14, and the first rotating pin 141 is coaxially arranged with the connecting arm 14, so that the rotating arm 232 is rotatably connected with the bracket 13 through the first rotating pin 141, and a second rotating pin 142 perpendicular to the connecting arm 14 is provided at one end of the connecting arm 14 away from the bracket 13, so that the connecting arm 14 and the wedge block 12 are hinged through the second rotating pin 142, and the axes of the first rotating pin 141 and the second rotating pin 142 are arranged at an angle. Further, a gasket (not shown in the figure) is provided between the bracket 13 and the connecting arm 14 to reduce the friction between the bracket 13 and the rotating arm 232; each wedge block 12 is provided with a first connecting member 121 and a second connecting member 122, and the first connecting member 121 and the second connecting member 122 are arranged vertically, and the ultrasonic detection probe is connected with the wedge block 12 through the first connecting member 121 and the second connecting member 122. In this embodiment, the first connecting member 121 and the second connecting member 122 are all hexagon socket set screws.

[0061] In this way, by providing the first rotating pin 141 and the second rotating pin 142, the wedge block 12 can be rotated more flexibly, thereby improving its adaptability inside the connecting pipe, and when the probe holder 1 is opened, the ultrasonic detection probe can continuously abut against the inner wall of the connecting pipe under the action of the torsion spring, thereby improving the coverage of the scanning area and the scanning efficiency.

[0062] It can be understood that the connecting member can be a pin, a buckle, an external hexagonal set screw or other structures, which can fix the ultrasonic detection probe on the wedge block 12 and enable the wedge block 12 to rotate around the axis of the second rotating pin 142. The specific structure and setting position of the connecting member can be flexibly adjusted and will not be elaborated here.

[0063] See also Figure 7 In some embodiments, a limit member 132 is provided on the bracket 13 , and the limit member 132 can selectively abut against the connecting arm 14 to limit the upper limit of the rotation angle of the connecting arm 14 toward one end of the bracket 13 .

[0064] Among them, the limiter 132 is a hexagon socket screw, which is arranged above the connecting arm 14, so that when the connecting arm 14 rotates to a certain angle, it abuts against the limiter 132, thereby limiting the rotation angle of the connecting arm 14 and preventing the connecting arm 14 from rotating excessively and causing the ultrasonic detection probe to separate from the inner wall of the connecting pipe.

[0065] In this way, the limiter 132 can limit the upper limit of the rotation angle of the connecting arm 14, so that the wedge block 12 can adapt to the shape changes of the target scanning area without flipping, thereby improving the coupling between the ultrasonic detection probe and the inner wall of the pipe, thereby improving the effectiveness of the detection results and the coverage of the scanning area.

[0066] It is understandable that the limit member 132 can also be a protrusion set on the connecting arm 14, and the bracket 13 has a corresponding groove for the protrusion to slide to limit the rotation angle of the connecting arm 14. The specific structure of the limit member 132 is not limited to the hexagon socket screw and will not be elaborated here.

[0067] See also Figure 2 In some embodiments, the cross-sectional area of ​​the guide head 3 gradually decreases in the direction close to the probe holder 1. In this embodiment, the guide head 3 is a conical structure, the first fixing member 31 and the second fixing member 32 both pass through the side wall of the guide head 3 and are threadedly connected to the guide head 3, and the center knot 22 is arranged on the side of the guide head 3 facing the probe holder 1.

[0068] In this way, the cross-sectional area of ​​the side of the guide head 3 facing the probe frame 1 is smaller, which not only leaves more space for assembling the connecting rod assembly 23 and the probe frame 1, but also makes it easier to inject the closed probe frame 1 into the pipe, thereby improving the flexibility and scanning efficiency of the ultrasonic detection probe inside the pipe.

[0069] It is understandable that the shape of the guide head 3 can also be trapezoidal, rectangular, cylindrical, etc. In this embodiment, the guide head 3 is conical, which not only saves space but also has sufficient strength to support the probe frame 1. The shape of the guide head 3 can be flexibly adjusted, which will not be elaborated here.

[0070] The working principle of the ultrasonic testing device is as follows:

[0071] When the probe holder 1 needs to be folded, the output end of the driving member 21 is contracted, and the center knot 22 is translated inward along the center axis of the guide head 3, driving the rotating arm 232 to contract inward, thereby driving the support arm 231 and the probe holder 1 to rotate and fold toward the center axis of the guide head 3 synchronously with the rotating arm 232, thereby reducing the circumferential size of the probe holder 1 to facilitate the delivery of the ultrasonic detection probe into the interior of the pipe.

[0072] When the ultrasonic detection probe enters the weld and inner fillet area between the connecting pipe and the cylinder, the probe frame 1 is opened under the action of the driving member 21 by adaptively adjusting the opening angle of the opening and closing mechanism 2, so that the ultrasonic detection probe can continue to fit tightly with the target scanning area under the action of the torsion spring. The moving mechanism 4 drives the ultrasonic detection probe to rotate circumferentially and expand and contract axially, and couples with the target scanning area, thereby improving the accuracy of the ultrasonic detection results and the full coverage of the scanning area.

[0073] When there is no need to perform ultrasonic testing, the driving member 21 drives the opening and closing mechanism 2 to retract, so that the moving mechanism 4 drives the extension tube 5 and the guide head 3 to move, and the circumferential position and axial position of the ultrasonic testing probe can be adjusted in real time to ensure that the guide head 3, the probe holder 1 and the ultrasonic testing probe have good pipeline passability.

[0074] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pipe ultrasonic detection device, characterized in that: include: Ultrasonic testing probe; A probe frame (1), the ultrasonic detection probe being arranged on the probe frame (1); An opening and closing mechanism (2), the opening and closing mechanism (2) comprising a driving member (21), the driving member (21) being in driving connection with the probe frame (1) and used for controlling the opening or closing of the probe frame (1); A guide head (3), the driving member (21) is connected to the guide head (3), and the probe frame (1) is arranged on one side of the guide head (3); A moving mechanism (4), wherein the moving mechanism (4) is arranged on a side of the guide head (3) away from the probe frame (1), and the moving mechanism (4) is coaxially arranged with the guide head (3).

2. The ultrasonic detection device for connecting pipes according to claim 1, characterized in that: The opening and closing mechanism (2) further comprises a center knot (22) and a connecting rod assembly (23); the driving member (21) is connected to the center knot (22) and is used to drive the center knot (22) to move axially; the probe holder (1) comprises an outer frame (11) and a wedge block (12); the outer frame (11) is transmission-connected to the connecting rod assembly (23) so that when the center knot (22) moves axially, the outer frame (11) moves in a direction close to or away from the axis of the center knot (22); the wedge block (12) is arranged on the outer frame (11), and the ultrasonic detection probe is arranged on the wedge block (12).

3. The ultrasonic detection device for connecting pipes according to claim 2, characterized in that: The connecting rod assembly (23) comprises a supporting arm (231) and a rotating arm (232), one end of the supporting arm (231) is hinged to the guide head (3), and the rotating arm (232) is hinged to an end of the supporting arm (231) away from the guide head (3), the central knot (22), and the probe frame (1).

4. The ultrasonic detection device for connecting pipes according to claim 2, characterized in that: The center knot (22) is provided with one, the center knot (22) is coaxially arranged with the guide head (3), the probe frame (1) is provided with a plurality of probe frames (1), and the plurality of probe frames (1) are circumferentially evenly spaced and arranged on the center knot (22); and / or at least two ultrasonic detection probes are arranged on the probe frame (1).

5. The ultrasonic detection device for connecting pipes according to claim 2, characterized in that: The probe frame (1) further comprises a bracket (13), wherein the bracket (13) is connected to a rotating shaft (131), wherein the rotating shaft (131) is connected to the outer frame (11) so that the bracket (13) rotates around the rotating shaft (131), wherein a torsion spring is arranged on the rotating shaft (131), and the wedge block (12) is drivingly connected to the bracket (13).

6. The ultrasonic detection device for connecting pipes according to claim 5, characterized in that: The probe frame (1) further comprises a connecting arm (14), one end of which is rotatably connected to the bracket (13), and the other end of which is hinged to the wedge block (12), and the axis of rotation of the connecting arm (14) around the bracket (13) and the axis of rotation of the wedge block (12) around the connecting arm (14) are arranged at an angle.

7. The ultrasonic detection device for connecting pipes according to claim 6, characterized in that: A limit piece (132) is provided on the bracket (13), and the limit piece (132) can selectively abut against the connecting arm (14) to limit the upper limit of the rotation angle of the connecting arm (14) toward one end of the bracket (13).

8. The ultrasonic detection device for connecting pipes according to any one of claims 1 to 7, characterized in that: The connecting pipe ultrasonic detection device also includes an extension tube (5), one end of the extension tube (5) is connected to the moving mechanism (4), and the other end is connected to the guide head (3), the driving member (21) is connected to a mounting frame (211), and the mounting frame (211) is connected to the guide head (3), and the extension tube (5) and the mounting frame (211) are both coaxially arranged with the guide head (3).

9. The ultrasonic detection device for connecting pipes according to claim 8, characterized in that: The guide head (3) is connected to a first fixing member (31), the first fixing member (31) is connected to both the guide head (3) and the extension tube (5) to limit the relative position of the guide head (3) and the extension tube (5); and / or the guide head (3) is connected to a second fixing member (32), the second fixing member (32) is connected to both the guide head (3) and the mounting frame (211) to limit the relative position of the guide head (3) and the mounting frame (211).

10. The ultrasonic detection device for connecting pipes according to any one of claims 1 to 7, characterized in that: The cross-sectional area of ​​the guide head (3) gradually decreases in a direction approaching the probe frame (1).

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