Portable ultrasonic flaw detection device

By designing a portable ultrasonic flaw detector, the ultrasonic flaw detector is fixed by using a housing, lateral and longitudinal moving seats and rotating parts, which solves the problem of requiring both hands in the existing technology and realizes the convenience of two-handed operation.

CN224122547UActive Publication Date: 2026-04-14HUBEI HAOCHANGHUA ENG QUALITY INSPECTION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-06
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Existing ultrasonic flaw detectors require the user's hands to be occupied during testing, making it impossible to perform other operations.

Method used

A portable ultrasonic flaw detector was designed, including a housing, a horizontal and vertical movable base, a rotating component, and a gripper. The ultrasonic flaw detector is fixed by the cooperation of the horizontal and vertical movable base, the shoulder strap makes it easy to carry, and the gripper is adjusted to a comfortable position by the rotating component.

Benefits of technology

This invention achieves the fixation of the ultrasonic flaw detector, allowing users to operate it with both hands and conveniently perform other operations, thus solving the problem of requiring both hands in existing technologies.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a portable ultrasonic flaw detection device which comprises a box body and a transverse moving seat connected with the box body in a sliding manner, the transverse moving seat is connected with a longitudinal moving seat in a sliding manner, the longitudinal moving seat is connected with a rotating piece, the rotating piece is connected with a clamping jaw, and the clamping jaw is used for clamping an ultrasonic flaw detector; and straps are connected to the box body. The technical scheme has the beneficial technical effects that the clamping jaw is moved out of the box body in the direction parallel to the box body through the transverse moving seat. And then, the clamping jaw box body is moved towards the hand direction of the user by utilizing the longitudinal moving seat. And finally, adjusting the clamping jaw to a comfortable use position of the user by utilizing the rotating piece, and clamping the ultrasonic flaw detector. Therefore, the ultrasonic flaw detector is fixed, so that a user can control the flaw detection head with two hands, and the user can use the ultrasonic flaw detector more conveniently. The problems that in the prior art, hands of a user need to be occupied, and other operations of the user are inconvenient are solved.
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Description

Technical Field

[0001] This utility model relates to the field of ultrasonic flaw detection, specifically to a portable ultrasonic flaw detection device. Background Technology

[0002] Ultrasonic testing utilizes the reflection and refraction phenomena that occur when ultrasonic waves encounter defects during propagation within materials. By analyzing the characteristics of the reflected waves, the location, size, and nature of internal defects can be determined. Non-destructive testing (NDT) is a testing method that inspects the surface and internal quality of components without damaging the workpiece or raw materials. As a highly efficient and non-destructive testing method, it is widely used in many fields such as machinery manufacturing, aerospace, and construction engineering.

[0003] The method of using an ultrasonic flaw detector is as follows: Place the pre-set probe on the surface of the workpiece to be tested, ensuring close contact between the probe and the workpiece surface. Then, press the scan button on the instrument to begin ultrasonic testing. During the testing process, the position and orientation of the probe can be adjusted as needed to cover the entire test area. Finally, observe the ultrasonic waveform on the flaw detector's display screen.

[0004] In current technology, during actual testing, the ultrasonic flaw detector is usually placed on a workbench or held in the hand while the other hand holds the probe and places it on the object. However, this occupies both hands and makes it inconvenient for the user to perform other operations.

[0005] Therefore, it is very necessary to provide a portable ultrasonic flaw detection device to solve the above-mentioned technical problems. Utility Model Content

[0006] Based on the above description, this utility model provides a portable ultrasonic flaw detection device to solve the problem that the prior art requires the user's hands to be occupied, making it inconvenient for the user to perform other operations.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A portable ultrasonic flaw detector includes a housing and a transverse moving seat slidably connected to the housing. A longitudinal moving seat is slidably connected to the transverse moving seat. A rotating component is connected to the longitudinal moving seat. A gripper is connected to the rotating component. The gripper is used to hold the ultrasonic flaw detector. A shoulder strap is connected to the housing.

[0008] Furthermore, a box slide frame is connected to the box body, and a transverse sliding groove is provided on the transverse moving seat. The transverse moving seat is slidably connected to the box slide frame through the transverse sliding groove.

[0009] Furthermore, the housing is provided with a first cavity, and the top of the first cavity has a first through hole; the first cavity is provided with a lateral movement drive, the lateral movement drive includes a rotating screw rotatably connected to the first cavity and a lateral seat block connected to the bottom of the lateral movement seat, the lateral seat block passes through the first through hole and is disposed in the first cavity, the lateral seat block is threadedly connected to the rotating screw, the rotating screw is connected to a screw gear, the screw gear is connected to a transmission gear, the transmission gear is connected to a motor gear, and the motor gear is connected to a lateral drive motor.

[0010] Furthermore, a longitudinal slide rail is connected to the transverse moving seat, and a longitudinal sliding groove is provided on the longitudinal moving seat. The longitudinal moving seat is slidably connected to the transverse moving seat through the longitudinal sliding groove.

[0011] Furthermore, a first limiting block and a second limiting block are connected to both sides of the transverse moving seat, and a third limiting block is connected to the longitudinal moving seat. The first limiting block and the second limiting block are used to limit the third limiting block.

[0012] Furthermore, it also includes an adjusting screw with one end rotatably connected to the first limiting block and the other end rotatably connected to the second limiting block. The adjusting screw is threadedly connected to the third limiting block, and an adjusting rotating ring is connected to the adjusting screw. The adjusting rotating ring is used by the user to rotate the adjusting screw.

[0013] Furthermore, an adjusting fixing screw is threadedly connected to the adjusting rotating ring. The adjusting fixing screw is used to abut against the first limiting block when tightened to lock the adjusting screw.

[0014] Furthermore, the rotating component is provided with at least one, each of the rotating components including a damping shaft and a rotating link connected to the damping shaft, the first damping shaft being connected to the longitudinal moving seat, the damping shaft of the adjacent rotating component being connected to the rotating link of the previous rotating component, and the rotating link of the last rotating component being connected to the gripper.

[0015] Furthermore, a clamping screw is threaded onto the jaws, the clamping screw is threaded onto the jaws, and a clamping pad is connected to the clamping screw, the clamping pad being used to press against the ultrasonic flaw detector.

[0016] Furthermore, the box is provided with a flaw detector placement slot, and a handle is connected to the top of the box.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0018] The gripper is moved out of the housing parallel to the housing by a lateral moving seat. Then, the gripper housing is moved towards the user's hand using a longitudinal moving seat. Finally, the gripper is adjusted to a comfortable position for the user using a rotating component, and the ultrasonic flaw detector is clamped in place. This secures the ultrasonic flaw detector, allowing the user to control the probe with both hands, making it more convenient to use. It solves the problem of existing technologies requiring the user's hands to operate, which is inconvenient for other tasks. Attached Figure Description

[0019] Figure 1 One of the overall structural schematic diagrams of a portable ultrasonic flaw detection device provided in this utility model embodiment;

[0020] Figure 2 One of the partial cross-sectional structural schematic diagrams of a portable ultrasonic flaw detection device provided in this utility model embodiment;

[0021] Figure 3 A second schematic diagram of the overall structure of a portable ultrasonic flaw detection device provided for an embodiment of this utility model;

[0022] Figure 4 This is the second partial cross-sectional structural schematic diagram of a portable ultrasonic flaw detection device provided for an embodiment of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Box body; 11. Box body slide rail; 12. First cavity; 13. First through hole; 14. Flaw detector placement slot; 15. Handle;

[0025] 2. Lateral moving seat; 21. Lateral sliding groove; 22. Longitudinal slide rail; 23. First limiting block; 24. Second limiting block;

[0026] 3. Longitudinal moving seat; 31. Longitudinal sliding groove; 32. Third limit block; 33. Adjusting screw; 34. Adjusting rotating ring; 35. Adjusting fixing screw;

[0027] 4. Rotating component; 41. Damping shaft; 42. Rotating connecting rod;

[0028] 5. Clamping jaws; 51. Clamping screw; 52. Clamping pad;

[0029] 6. Shoulder straps;

[0030] 7. Lateral movement drive; 71. Rotating screw; 72. Lateral seat block; 73. Screw gear; 74. Transmission gear; 75. Motor gear; 76. Lateral drive motor. Detailed Implementation

[0031] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0033] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0034] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0035] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0036] like Figures 1 to 4As shown, a portable ultrasonic flaw detector includes a housing 1 and a transverse moving seat 2 slidably connected to the housing 1. A longitudinal moving seat 3 is slidably connected to the transverse moving seat 2. A rotating component 4 is connected to the longitudinal moving seat 3. A gripper 5 is connected to the rotating component 4. The gripper 5 is used to hold the ultrasonic flaw detector. A shoulder strap 6 is connected to the housing 1.

[0037] In this embodiment, the longitudinal moving base 3 and the transverse moving base 2 are slidably connected, the rotating component 4 is connected to the longitudinal moving base 3, and the gripper 5 is connected to the rotating component 4. When using the device, the user carries the housing 1 on their back using the shoulder strap 6. First, the gripper 5 is moved parallel to the housing 1 using the transverse moving base 2. Then, the longitudinal moving base 3 moves the gripper 5 and housing 1 towards the user's hand. Finally, the rotating component 4 is used to adjust the gripper 5 to a comfortable position for the user and clamp the ultrasonic flaw detector. It should be noted that the rotating component 4 uses a damped pivot, allowing the gripper 5 to rotate under the drive of the rotating component 4 and maintain a fixed position after reaching the appropriate position. The added damping adjustment function provides resistance during rotation, preventing excessive angle adjustment due to inertia, and also ensuring stability when rotation stops. Therefore, the user can use both hands to pick up the flaw detector head, facilitating operation and allowing inspectors to easily carry the device and ultrasonic flaw detector on their backs for convenient transport. It is important to know that there are some usage scenarios, such as narrow areas where it is not suitable for the user to carry the box 1 on their back. The user can put down the box 1 according to the actual usage situation and use the flaw detector and flaw detector head to inspect the object that needs to be inspected. These are relatively special cases, which will not be elaborated here.

[0038] In some embodiments, a box slide frame 11 is connected to the box body 1, and a transverse sliding groove 21 is provided on the transverse moving seat 2. The transverse moving seat 2 is slidably connected to the box slide frame 11 through the transverse sliding groove 21.

[0039] In this embodiment, the sliding connection between the box slide frame 11 and the transverse sliding groove 21 provides a motion basis for the transverse moving seat 2 to move horizontally on the box 1. Furthermore, corresponding limiting components are provided on the box slide frame 11 to prevent the transverse sliding groove 21 from falling off during movement. These limiting components are connected by snap-fit ​​or threaded connections for easy maintenance, which are well-known techniques and will not be elaborated upon here.

[0040] In some embodiments, the housing 1 is provided with a first cavity 12, and the top of the first cavity 12 is provided with a first through hole 13; the first cavity 12 is provided with a transverse movement drive 7, the transverse movement drive 7 includes a rotating screw 71 rotatably connected in the first cavity 12 and a transverse seat block 72 connected to the bottom of the transverse movement seat, the transverse seat block 72 passes through the first through hole 13 and is provided in the first cavity 12, the transverse seat block 72 is threadedly connected to the rotating screw 71, the rotating screw 71 is connected with a screw gear 73, the screw gear 73 is geared to a transmission gear 74, the transmission gear 74 is geared to a motor gear 75, and the motor gear 75 is connected to a transverse drive motor 76.

[0041] In this embodiment, by setting a lateral movement drive 7, the rotational motion of the lateral drive motor 76 is converted into the linear motion of the lateral movement seat 2 on the housing 1, thus eliminating the need for manual pushing of the lateral movement seat 2. Setting the lateral movement drive 7 within the first cavity 12 of the housing 1 not only protects the drive components from external impacts, dust, and moisture, but also makes the entire device more compact, aesthetically pleasing, and easy to carry and use.

[0042] Preferably, the threads between the rotating screw 71 and the transverse seat block 72 will wear during long-term use, leading to an increase in the thread fit clearance and affecting the accuracy and stability of the transmission. When the wear is severe, problems such as thread slippage and inaccurate positioning may occur, requiring periodic replacement or repair.

[0043] Furthermore, the installation of batteries, controllers, control buttons, etc. on the housing 1 to reasonably control the movement of the transverse drive motor 76 is a technical means well known to those skilled in the art, and will not be described in detail here.

[0044] In addition, a corresponding lubrication system is provided in the first cavity 12 to ensure the service life of the drive components. This is a technical means well known to those skilled in the art, and will not be described in detail here.

[0045] Secondly, install a dust cover or air filter at the first through-hole 13 to filter the air entering the cavity and reduce the entry of dust and impurities. Clean and replace the dust cover and filter regularly to ensure their filtration effectiveness.

[0046] Finally, rotating bearings are connected to the corresponding positions of the rotating screw 71, transmission gear 74, and motor gear 75 to rotatably connect the rotating screw 71, transmission gear 74, and motor gear 75, ensuring their stability during rotation. This should also fall within the scope of protection of this application.

[0047] In some embodiments, a longitudinal slide rail 22 is connected to the transverse moving seat 2, and a longitudinal sliding groove 31 is provided on the longitudinal moving seat 3. The longitudinal moving seat 3 is slidably connected to the transverse moving seat 2 through the longitudinal sliding groove 31.

[0048] In this embodiment, a protrusion is provided on the longitudinal slide rail 22 and a snap-fit ​​groove is provided on the longitudinal sliding groove 31, thereby preventing detachment during sliding, which should also fall within the protection scope of this application.

[0049] In some embodiments, the transverse moving seat 2 is connected to a first limiting block 23 and a second limiting block 24 on both sides, and the longitudinal moving seat 3 is connected to a third limiting block 32. The first limiting block 23 and the second limiting block 24 are used to limit the third limiting block 32.

[0050] In this embodiment, the third limiting block 32 moves relative to the first limiting block 23 and the second limiting block 24. When the third limiting block 32 approaches the first limiting block 23, the first limiting block 23 limits the third limiting block 32; when the third limiting block 32 approaches the second limiting block 24, the second limiting block 24 limits the third limiting block 32.

[0051] In some embodiments, an adjusting screw 33 is further included, one end of which is rotatably connected to the first limiting block 23 and the other end of which is rotatably connected to the second limiting block 24. The adjusting screw 33 is threadedly connected to the third limiting block 32. An adjusting rotating ring 34 is connected to the adjusting screw 33, and the adjusting rotating ring 34 is used by the user to rotate the adjusting screw 33.

[0052] In this embodiment, the adjusting screw 33 is threadedly connected to the third limiting block 32, and the user rotates the adjusting screw 33 using the adjusting rotating ring 34. This allows for adjustment of the position of the longitudinal moving seat 3.

[0053] In some embodiments, an adjusting fixing screw 35 is threadedly connected to the adjusting rotating ring 34. The adjusting fixing screw 35 is used to abut against the first limiting block 23 when tightened to lock the adjusting screw 33.

[0054] In this embodiment, by setting an adjusting fixing screw 35 on the adjusting rotating ring 34, which abuts against the first limiting block 23 when tightened, the adjusting screw 33 is locked to prevent the longitudinal moving seat 3 from shifting due to the rotation of the adjusting screw 33.

[0055] In some embodiments, the rotating member 4 is provided with at least one, and each rotating member 4 includes a damping shaft 41 and a rotating connecting rod 42 connected to the damping shaft 41. The first damping shaft 41 is connected to the longitudinal moving seat 3, the damping shaft 41 of the adjacent rotating member 4 is connected to the rotating connecting rod 42 of the previous rotating member 4, and the rotating connecting rod 42 of the last rotating member 4 is connected to the gripper 5.

[0056] In this embodiment, when there is one rotating member 4, the damping shaft 41 is connected to the longitudinal moving seat 3, and the gripper 5 is connected to the rotating connecting rod 42. When there are two rotating members 4, the first damping shaft 41 is connected to the longitudinal moving seat 3, the second damping shaft 41 is connected to the first rotating connecting rod 42, the gripper 5 is connected to the second rotating connecting rod 42, and so on. The damping shaft 41 ensures that the rotating connecting rod 42 can rotate, and after the rotating connecting rod 42 has rotated, it can remain stationary in the corresponding position.

[0057] In some embodiments, a clamping screw 51 is threadedly connected to the jaw 5, the clamping screw is threadedly connected to the jaw 5, and a clamping pad 52 is connected to the clamping screw 51. The clamping pad 52 is used to press against the ultrasonic flaw detector.

[0058] In this embodiment, the ultrasonic flaw detector is placed on the gripper 5. To further improve the stability of the gripping, the gripper screw 51 is rotated so that the gripper screw 51 abuts against the ultrasonic flaw detector, keeping the flaw detector in a fixed position and preventing the flaw detector from falling off.

[0059] In some embodiments, the housing 1 is provided with a flaw detector placement slot 14, and the top of the housing 1 is connected to a handle 15.

[0060] In this embodiment, the flaw detector placement slot 14 is used to place the flaw detector when it is not in use. The handle 15 is used to facilitate the user to take the box 1.

[0061] Example 1:

[0062] Start the transverse drive motor 76. The transverse drive motor 76 begins operation, driving the motor gear 75 to rotate. The motor gear 75 is connected to the transmission gear 74, thus driving the transmission gear 74 to rotate. The transmission gear 74 then drives the screw gear 73, which is connected to it, to rotate. The screw gear 73 is mounted on the rotating screw 71, causing the rotating screw 71 to rotate within the first cavity 12. Because the transverse seat block 72, connected to the bottom of the transverse moving seat 2, passes through the first through hole 13 and is located within the first cavity 12, and is threadedly connected to the rotating screw 71, the rotation of the rotating screw 71 drives the transverse seat block 72 to move axially along the rotating screw 71, thereby causing the transverse moving seat 2 to slide laterally on the housing slide rail 11, achieving precise transverse position adjustment. After adjustment, turn off the transverse drive motor 76. Holding the longitudinal moving seat 3, since the longitudinal sliding groove 31 on the longitudinal moving seat 3 is slidably connected to the longitudinal slide rail 22 on the transverse moving seat 2, force is applied to make the longitudinal moving seat 3 slide longitudinally along the direction of the longitudinal slide rail 22, adjusting it to the desired position. At this time, the first limiting block 23 and the second limiting block 24 on both sides of the transverse moving seat 2 play a limiting role, preventing the longitudinal moving seat 3 from sliding excessively and disengaging from the transverse moving seat 2. When more precise adjustment of the position of the longitudinal moving seat 3 is required, the adjusting rotating ring 34 is rotated. The adjusting rotating ring 34 drives the adjusting screw 33 to rotate. Since the adjusting screw 33 is threadedly connected to the third limiting block 32 on the longitudinal moving seat 3, the rotation of the adjusting screw 33 will cause the third limiting block 32 to move axially along the adjusting screw 33, thereby driving the longitudinal moving seat 3 to make a small position adjustment. After the position fine-tuning is completed, to prevent displacement of the longitudinal moving seat 3 during subsequent use, tighten the adjusting fixing screw 35. The adjusting fixing screw 35 is threadedly connected to the adjusting rotating ring 34. After tightening, the adjusting fixing screw 35 abuts tightly against the first limiting block 23, thereby restricting the rotation of the adjusting rotating ring 34 and the adjusting screw 33, and fixing the position of the longitudinal moving seat 3. Adjust the angle of the rotating component 4 according to the detection requirements. Since the rotating component 4 consists of a damping shaft 41 and a rotating connecting rod 42, the first damping shaft 41 is connected to the longitudinal moving seat 3, the damping shaft 41 of the adjacent rotating component 4 is connected to the rotating connecting rod 42 of the previous rotating component 4, and the rotating connecting rod 42 of the last rotating component 4 is connected to the gripper 5. By manually applying force to rotate the rotating connecting rod 42, the damping force provided by the damping shaft 41 can be used to adjust the gripper 5 and the flaw detector to any required angle and keep it stable to adapt to the requirements of different detection positions and angles.

[0063] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0064] The gripper is moved out of the housing parallel to the housing by a lateral moving seat. Then, the gripper housing is moved towards the user's hand using a longitudinal moving seat. Finally, the gripper is adjusted to a comfortable position for the user using a rotating component, and the ultrasonic flaw detector is clamped in place. This secures the ultrasonic flaw detector, allowing the user to control the probe with both hands, making it more convenient to use. It solves the problem of existing technologies requiring the user's hands to operate, which is inconvenient for other tasks.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable ultrasonic flaw detection device, characterized in that, It includes a housing (1) and a transverse moving seat (2) slidably connected to the housing (1). A longitudinal moving seat (3) is slidably connected to the transverse moving seat (2). A rotating component (4) is connected to the longitudinal moving seat (3). A gripper (5) is connected to the rotating component (4). The gripper (5) is used to hold the ultrasonic flaw detector. A shoulder strap (6) is connected to the housing (1).

2. The portable ultrasonic flaw detection device according to claim 1, characterized in that, The box body (1) is connected to a box body slide frame (11), and the transverse moving seat (2) is provided with a transverse sliding groove (21). The transverse moving seat (2) is slidably connected to the box body slide frame (11) through the transverse sliding groove (21).

3. The portable ultrasonic flaw detection device according to claim 1, characterized in that, The housing (1) is provided with a first cavity (12), and the top of the first cavity (12) is provided with a first through hole (13); the first cavity (12) is provided with a transverse movement drive (7), the transverse movement drive (7) includes a rotating screw (71) rotatably connected in the first cavity (12) and a transverse seat block (72) connected to the bottom of the transverse movement seat. The transverse seat block (72) passes through the first through hole (13) and is provided in the first cavity (12). The transverse seat block (72) is threadedly connected to the rotating screw (71). The rotating screw (71) is connected with a screw gear (73). The screw gear (73) is connected with a transmission gear (74). The transmission gear (74) is connected with a motor gear (75). The motor gear (75) is connected with a transverse drive motor (76).

4. A portable ultrasonic flaw detection device according to claim 1, characterized in that, The transverse moving seat (2) is connected to a longitudinal slide rail (22), and the longitudinal moving seat (3) is provided with a longitudinal sliding groove (31). The longitudinal moving seat (3) is slidably connected to the transverse moving seat (2) through the longitudinal sliding groove (31).

5. A portable ultrasonic flaw detection device according to claim 4, characterized in that, The transverse moving seat (2) is connected to a first limiting block (23) and a second limiting block (24) on both sides, and the longitudinal moving seat (3) is connected to a third limiting block (32). The first limiting block (23) and the second limiting block (24) are used to limit the third limiting block (32).

6. A portable ultrasonic flaw detection device according to claim 5, characterized in that, It also includes an adjusting screw (33) with one end rotatably connected to the first limiting block (23) and the other end rotatably connected to the second limiting block (24). The adjusting screw (33) is threadedly connected to the third limiting block (32). An adjusting rotating ring (34) is connected to the adjusting screw (33). The adjusting rotating ring (34) is used by the user to rotate the adjusting screw (33).

7. A portable ultrasonic flaw detection device according to claim 6, characterized in that, The adjusting rotating ring (34) is threaded with an adjusting fixing screw (35), which is used to abut against the first limiting block (23) when tightened to lock the adjusting screw (33).

8. A portable ultrasonic flaw detection device according to claim 1, characterized in that, The rotating component (4) is provided with at least one, and each rotating component (4) includes a damping shaft (41) and a rotating link (42) connected to the damping shaft (41). The first damping shaft (41) is connected to the longitudinal moving seat (3). The damping shaft (41) of the adjacent rotating component (4) is connected to the rotating link (42) of the previous rotating component (4). The rotating link (42) of the last rotating component (4) is connected to the gripper (5).

9. A portable ultrasonic flaw detection device according to claim 1, characterized in that, The jaw (5) is threaded with a clamping screw (51), which is threaded to the jaw (5). A clamping pad (52) is connected to the clamping screw (51), which is used to press against the ultrasonic flaw detector.

10. A portable ultrasonic flaw detection device according to claim 1, characterized in that, The box (1) is provided with a flaw detector placement slot (14), and the top of the box (1) is connected to a handle (15).