Convenient ultrasonic flaw detection equipment and use method thereof

Abstract

The invention discloses convenient ultrasonic flaw detection equipment and a use method thereof, and relates to the technical field of ultrasonic flaw detection, the convenient ultrasonic flaw detection equipment comprises a main body unit, a winding unit and a guide unit which are arranged in the main body unit, and a detection unit and a cleaning unit which are arranged at the side part of the main body unit; the winding unit comprises a rotating shaft movably installed in the main body unit, a winding roller installed on the side wall of the rotating shaft, a first driving motor installed at the input end of the winding roller and a wire installed on the side wall of the winding roller. According to the convenient ultrasonic flaw detection equipment and the use method thereof, through the arrangement of the cleaning unit, the procedure of cleaning the surface of a detected object in advance is omitted; and through the arrangement of the winding unit and the guiding unit, the wires are prevented from being wound and scattered, and convenient use of the next time is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic flaw detection, and in particular to a convenient ultrasonic flaw detection device and a use method thereof. Background Art

[0002] Ultrasonic flaw detection is a method of inspecting part defects by using the characteristic that ultrasound can penetrate deep into metal materials and reflect at the edge of the interface when entering from one section to another. When the ultrasonic beam passes from the surface of the part through the probe into the metal interior, reflected waves are generated when encountering defects and the bottom of the part, forming pulse waveforms on the fluorescent screen. The location and size of the defect are judged based on these pulse waveforms. Ultrasonic flaw detector is a type of ultrasonic flaw detection equipment.

[0003] The patent application of Jianjingsuo in its authorization publication number: CN108195936A discloses a portable ultrasonic flaw detection device with high detection accuracy, including a main unit, a data cable, a protective cover and a detection rod, one end of the detection rod is connected to the main unit through the data cable, the protective cover is sleeved on the detection rod, a control mechanism and an adding mechanism are arranged in the detection rod, the adding mechanism includes a fixing ring, a probe, a pressure sensor and two adding components, the adding component includes a driving component and an extrusion component, the driving component includes a connecting block, a light rod, a first spring, a limit block, a connecting rod and a lifting rod, the control mechanism includes a lifting component and two control components, the portable ultrasonic flaw detection device with high detection accuracy reduces the influence of air on the detection data through the control mechanism, not only that, but also realizes the function of adding coupling agent through the adding mechanism, reduces the use of coupling agent and saves cost.

[0004] Although the above scheme reduces the influence of air on the detection data through the control mechanism, the ultrasonic flaw detector does not have the function of storing the wires, and the wires are easily entangled and scattered, affecting the next use. In order to prevent impurities on the surface of the object to be measured from affecting the detection results, the surface of the object to be measured needs to be cleaned in advance. For this reason, we propose a convenient ultrasonic flaw detection device and its use method. Summary of the invention

[0005] The main purpose of the present invention is to provide a portable ultrasonic flaw detection device and a method of using the same, which can effectively solve the problem that a portable ultrasonic flaw detection device with high detection accuracy in the background technology does not have the function of storing the wires, and the wires are easily entangled and scattered, affecting the next use; and in order to prevent impurities on the surface of the object to be tested from affecting the detection results, the surface of the object to be tested needs to be cleaned in advance.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a convenient ultrasonic flaw detection device and a method of using the same, comprising a main unit, a winding unit and a guide unit arranged inside the main unit, and a detection unit and a cleaning unit arranged on the side of the main unit; The winding unit comprises a rotating shaft movably mounted inside the main unit, a winding roller mounted on the side wall of the rotating shaft, a first driving motor mounted on the input end of the winding roller, and a wire mounted on the side wall of the winding roller; The guide unit includes a screw rod movably installed inside the main unit and located below the rotating shaft, a guide member arranged on the screw rod, and a transmission member arranged between the rotating shaft and the screw rod; The cleaning unit includes a fixing seat installed on the side wall of the detection unit, a threaded shaft movably installed in the fixing seat, a second driving motor installed at the input end of the threaded shaft, a telescopic member arranged on the threaded shaft, and a cleaning soft brush installed at the telescopic end of the telescopic member.

[0007] Preferably, the main unit includes a main body and a display screen disposed on a surface of the main body.

[0008] Preferably, the main unit further comprises a programmable logic controller installed inside the main body.

[0009] Preferably, the guide member includes a moving member installed on the peripheral side of the screw rod, and a guide seat installed on the side wall of the moving member.

[0010] Preferably, the transmission member includes pulleys installed on the rotating shaft and the side wall of the screw rod, and a transmission belt movably installed between the two pulleys.

[0011] Preferably, the detection unit includes a protective cover installed at the end of the wire, a negative pressure pump installed on the side wall of the protective cover, a connecting pipe installed at the output end of the negative pressure pump, a suction cup installed at the opposite end of the connecting pipe and the negative pressure pump, and a detection member arranged inside the protective cover.

[0012] Preferably, the detection member comprises an electric telescopic rod installed on the inner bottom wall of the protective cover, a mounting plate installed on the telescopic end of the electric telescopic rod, and a probe installed on the mounting plate.

[0013] Preferably, the telescopic member includes a movable seat installed on the circumferential side of the threaded shaft, a fixed cylinder installed on the side wall of the movable seat, a connecting spring installed on the inner bottom wall of the fixed cylinder, and a connecting rod installed on the end of the connecting spring and fixedly connected to the cleaning soft brush.

[0014] Preferably, the cleaning unit comprises a limiting washer mounted on the inner side wall of the fixing seat, and the limiting washer is sleeved on the peripheral side surface of the threaded shaft.

[0015] A portable ultrasonic flaw detection device and a method for using the same according to any one of claims 1 to 5, comprising the following steps: S1: Release the wire to make the protective cover close to the workpiece to be tested. When the suction cup contacts the workpiece, the negative pressure pump works to make the suction cup adsorb on the surface of the workpiece. The second drive motor drives the threaded shaft to rotate, and the telescopic part drives the cleaning soft brush to move up and down along the threaded shaft to complete the grinding of the workpiece surface. S2: The telescopic end of the electric telescopic rod is extended, and the probe is close to the surface of the workpiece. At this time, the programmable logic controller controls the emission of ultrasonic waves for flaw detection; S3: After the flaw detection is completed, the telescopic end of the electric telescopic rod shrinks, and the negative pressure pump works to destroy the negative pressure between the suction cup and the workpiece; S4: The first driving motor drives the rotating shaft to rotate, and the winding roller winds the wire. At the same time, the transmission member drives the lead screw to rotate synchronously, and the guide member guides the winding process.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, through the detection unit, when it is necessary to perform flaw detection on the workpiece, the wire is released so that the protective cover is close to the workpiece to be detected. When the suction cup contacts the workpiece, the negative pressure pump works so that the suction cup is adsorbed on the surface of the workpiece, thereby completing the equipment fixation before flaw detection.

[0017] 2. In the present invention, by means of the cleaning unit, after the fixation before flaw detection is completed, the second drive motor drives the threaded shaft to rotate, and the telescopic part drives the cleaning soft brush to move up and down along the threaded shaft. During the movement of the cleaning soft brush, the surface of the workpiece can be polished, saving the process of cleaning the surface of the object to be tested in advance.

[0018] 3. In the present invention, by setting up a winding unit and a guiding unit, after the flaw detection monitoring is completed, the first drive motor drives the rotating shaft to rotate, and the winding roller winds the wire. At the same time, the transmission member drives the lead screw to rotate synchronously. At this time, the guide member moves along the lead screw to guide the winding process of the wire, thereby avoiding the entanglement and disorder of the wire and ensuring convenient use next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure I in the middle; Figure 3 It is a schematic diagram of the structure of the present invention viewed from above; Figure 4 It is a schematic diagram of the main structure of the present invention; Figure 5 For the present invention Figure 3Schematic diagram of the cross-sectional structure at AA in the middle; Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure of middle II; Figure 7 For the present invention Figure 5 Schematic diagram of the cross-sectional structure at BB in the middle.

[0020] In the figure: 1. Main unit; 101. Main body; 102. Display screen; 103. Programmable logic controller; 2. Winding unit; 201. Rotating shaft; 202. Winding roller; 203. First driving motor; 204. Conducting wire; 3. Guide unit; 301. Screw rod; 302. Guide member; 3021. Moving member; 3022. Guide seat; 303. Transmission member; 3031. Pulley; 3032. Transmission belt; 4. Detection unit; 401. Protective cover; 402. Negative pressure pump; 403. Connecting pipe; 404. Suction cup; 405. Detection piece; 4051. Electric telescopic rod; 4052. Mounting plate; 4053. Probe; 5. Cleaning unit; 501. Fixed seat; 502. Threaded shaft; 503. Second driving motor; 504. Telescopic member; 5041. Moving seat; 5042. Fixed cylinder; 5043. Connecting spring; 5044. Connecting rod; 505. Cleaning soft brush; 506. Limiting washer. Example

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, the present invention is a convenient ultrasonic flaw detection device and a method of using the same, comprising a main unit 1, a winding unit 2 and a guide unit 3 arranged inside the main unit 1, and a detection unit 4 and a cleaning unit 5 arranged on the side of the main unit 1; like Figure 5 As shown, the winding unit 2 includes a rotating shaft 201 movably installed inside the main unit 1, a winding roller 202 installed on the side wall of the rotating shaft 201, a first driving motor 203 installed at the input end of the winding roller 202, and a wire 204 installed on the side wall of the winding roller 202. When the first driving motor 203 drives the rotating shaft 201 to rotate, it can drive the winding roller 202 to rotate synchronously; like Figure 5As shown, the guide unit 3 includes a screw rod 301 movably installed inside the main unit 1 and located below the rotating shaft 201, a guide member 302 arranged on the screw rod 301, and a transmission member 303 arranged between the rotating shaft 201 and the screw rod 301. When the screw rod 301 rotates, the guide member 302 can move along the screw rod 301; like Figure 2 As shown, the cleaning unit 5 includes a fixed base 501 installed on the side wall of the detection unit 4, a threaded shaft 502 movably installed in the fixed base 501, a second driving motor 503 installed at the input end of the threaded shaft 502, a telescopic member 504 arranged on the threaded shaft 502, and a cleaning soft brush 505 installed at the telescopic end of the telescopic member 504. When the second driving motor 503 drives the threaded shaft 502 to rotate, the telescopic member 504 can move along the threaded shaft 502.

[0022] like Figure 1 As shown, the main unit 1 includes a main body 101 and a display screen 102 disposed on the surface of the main body 101. The arrangement of the display screen 102 facilitates timely analysis of flaw detection data.

[0023] like Figure 5 As shown, the main unit 1 further includes a programmable logic controller 103 installed inside the main body 101. The programmable logic controller 103 is configured to input and output flaw detection instructions.

[0024] like Figure 5 As shown, the guide member 302 includes a moving member 3021 installed on the side surface of the screw rod 301, and a guide seat 3022 installed on the side wall of the moving member 3021. When the screw rod 301 is driven, the moving member 3021 can drive the guide seat 3022 to move along the screw rod 301.

[0025] like Figure 5 As shown, the transmission member 303 includes a pulley 3031 installed on the side wall of the rotating shaft 201 and the screw rod 301, and a transmission belt 3032 movably installed between the two pulleys 3031. When the rotating shaft 201 rotates, the screw rod 301 can be driven to rotate synchronously through the pulley 3031 and the transmission belt 3032.

[0026] like Figure 4 As shown, the detection unit 4 includes a protective cover 401 installed at the end of the wire 204, a negative pressure pump 402 installed on the side wall of the protective cover 401, a connecting pipe 403 installed at the output end of the negative pressure pump 402, a suction cup 404 installed at the opposite end of the connecting pipe 403 and the negative pressure pump 402, and a detection member 405 arranged inside the protective cover 401. When the negative pressure pump 402 is working, a negative pressure chamber can be formed between the suction cup 404 and the workpiece.

[0027] like Figure 7As shown, the detection component 405 includes an electric telescopic rod 4051 installed on the inner bottom wall of the protective cover 401, a mounting plate 4052 installed on the telescopic end of the electric telescopic rod 4051, and a probe 4053 installed on the mounting plate 4052. When the telescopic end of the electric telescopic rod 4051 is extended or retracted, the probe 4053 can be driven to move synchronously through the mounting plate 4052.

[0028] like Figure 6 As shown, the telescopic member 504 includes a movable seat 5041 installed on the side surface of the threaded shaft 502, a fixed cylinder 5042 installed on the side wall of the movable seat 5041, a connecting spring 5043 installed on the inner bottom wall of the fixed cylinder 5042, and a connecting rod 5044 installed on the end of the connecting spring 5043 and fixedly connected to the cleaning soft brush 505. The setting of the connecting spring 5043 can make the cleaning soft brush 505 close to the surface of the workpiece.

[0029] like Figure 3 As shown, the cleaning unit 5 includes a limiting washer 506 installed on the inner wall of the fixed seat 501, and the limiting washer 506 is sleeved on the peripheral side of the threaded shaft 502. The setting of the limiting washer 506 prevents the moving seat 5041 from contacting and colliding with the inner wall of the fixed seat 501 during the process of moving along the threaded shaft 502.

[0030] A portable ultrasonic flaw detection device and a method for using the same according to any one of claims 1 to 9, comprising the following steps: S1: Release the wire to make the protective cover 401 close to the workpiece to be tested. When the suction cup 404 contacts the workpiece, the negative pressure pump 402 works to make the suction cup 404 adsorb on the surface of the workpiece. The second driving motor 503 drives the threaded shaft 502 to rotate, and the telescopic member 504 drives the cleaning soft brush 505 to move up and down along the threaded shaft 502 to complete the grinding of the workpiece surface. S2: The telescopic end of the electric telescopic rod 4051 is extended, and the probe 4053 is close to the surface of the workpiece. At this time, the programmable logic controller 103 controls the emission of ultrasonic waves for flaw detection; S3: After the flaw detection is completed, the telescopic end of the electric telescopic rod 4051 is retracted, and the negative pressure pump 402 works to destroy the negative pressure between the suction cup 404 and the workpiece; S4: The first driving motor 203 drives the rotating shaft 201 to rotate, and the winding roller 202 winds up the wire 204. At the same time, the transmission member 303 drives the lead screw 301 to rotate synchronously, and the guide member 302 guides the winding process.

[0031] When it is necessary to perform flaw detection on the workpiece, the wire 204 is released to allow the protective cover 401 to approach the workpiece to be detected. When the suction cup 404 contacts the workpiece, the negative pressure pump 402 works to allow the suction cup 404 to be adsorbed on the surface of the workpiece, thereby completing the equipment fixation before flaw detection. Subsequently, the second drive motor 503 drives the threaded shaft 502 to rotate, and the telescopic member 504 drives the cleaning soft brush 505 to move up and down along the threaded shaft 502. During the movement of the cleaning soft brush 505, the surface of the workpiece can be polished, which saves the process of cleaning the surface of the object to be detected in advance and avoids the influence of impurities on the surface of the object on the flaw detection results. Example

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, the present invention is a convenient ultrasonic flaw detection device and a method of using the same, comprising a main unit 1, a winding unit 2 and a guide unit 3 arranged inside the main unit 1, and a detection unit 4 and a cleaning unit 5 arranged on the side of the main unit 1; like Figure 5 As shown, the winding unit 2 includes a rotating shaft 201 movably installed inside the main unit 1, a winding roller 202 installed on the side wall of the rotating shaft 201, a first driving motor 203 installed at the input end of the winding roller 202, and a wire 204 installed on the side wall of the winding roller 202. When the first driving motor 203 drives the rotating shaft 201 to rotate, it can drive the winding roller 202 to rotate synchronously; like Figure 5 As shown, the guide unit 3 includes a screw rod 301 movably installed inside the main unit 1 and located below the rotating shaft 201, a guide member 302 arranged on the screw rod 301, and a transmission member 303 arranged between the rotating shaft 201 and the screw rod 301. When the screw rod 301 rotates, the guide member 302 can move along the screw rod 301; like Figure 2 As shown, the cleaning unit 5 includes a fixed base 501 installed on the side wall of the detection unit 4, a threaded shaft 502 movably installed in the fixed base 501, a second driving motor 503 installed at the input end of the threaded shaft 502, a telescopic member 504 arranged on the threaded shaft 502, and a cleaning soft brush 505 installed at the telescopic end of the telescopic member 504. When the second driving motor 503 drives the threaded shaft 502 to rotate, the telescopic member 504 can move along the threaded shaft 502.

[0033] like Figure 1As shown, the main unit 1 includes a main body 101 and a display screen 102 disposed on the surface of the main body 101. The arrangement of the display screen 102 facilitates timely analysis of flaw detection data.

[0034] like Figure 5 As shown, the main unit 1 further includes a programmable logic controller 103 installed inside the main body 101. The programmable logic controller 103 is configured to input and output flaw detection instructions.

[0035] like Figure 5 As shown, the guide member 302 includes a moving member 3021 installed on the side surface of the screw rod 301, and a guide seat 3022 installed on the side wall of the moving member 3021. When the screw rod 301 is driven, the moving member 3021 can drive the guide seat 3022 to move along the screw rod 301.

[0036] like Figure 5 As shown, the transmission member 303 includes a pulley 3031 installed on the side wall of the rotating shaft 201 and the screw rod 301, and a transmission belt 3032 movably installed between the two pulleys 3031. When the rotating shaft 201 rotates, the screw rod 301 can be driven to rotate synchronously through the pulley 3031 and the transmission belt 3032.

[0037] like Figure 4 As shown, the detection unit 4 includes a protective cover 401 installed at the end of the wire 204, a negative pressure pump 402 installed on the side wall of the protective cover 401, a connecting pipe 403 installed at the output end of the negative pressure pump 402, a suction cup 404 installed at the opposite end of the connecting pipe 403 and the negative pressure pump 402, and a detection member 405 arranged inside the protective cover 401. When the negative pressure pump 402 is working, a negative pressure chamber can be formed between the suction cup 404 and the workpiece.

[0038] like Figure 7 As shown, the detection component 405 includes an electric telescopic rod 4051 installed on the inner bottom wall of the protective cover 401, a mounting plate 4052 installed on the telescopic end of the electric telescopic rod 4051, and a probe 4053 installed on the mounting plate 4052. When the telescopic end of the electric telescopic rod 4051 is extended or retracted, the probe 4053 can be driven to move synchronously through the mounting plate 4052.

[0039] like Figure 6 As shown, the telescopic member 504 includes a movable seat 5041 installed on the side surface of the threaded shaft 502, a fixed cylinder 5042 installed on the side wall of the movable seat 5041, a connecting spring 5043 installed on the inner bottom wall of the fixed cylinder 5042, and a connecting rod 5044 installed on the end of the connecting spring 5043 and fixedly connected to the cleaning soft brush 505. The setting of the connecting spring 5043 can make the cleaning soft brush 505 close to the surface of the workpiece.

[0040] like Figure 3 As shown, the cleaning unit 5 includes a limiting washer 506 installed on the inner wall of the fixed seat 501, and the limiting washer 506 is sleeved on the peripheral side of the threaded shaft 502. The setting of the limiting washer 506 prevents the moving seat 5041 from contacting and colliding with the inner wall of the fixed seat 501 during the process of moving along the threaded shaft 502.

[0041] A portable ultrasonic flaw detection device and a method for using the same according to any one of claims 1 to 9, comprising the following steps: S1: Release the wire to make the protective cover 401 close to the workpiece to be tested. When the suction cup 404 contacts the workpiece, the negative pressure pump 402 works to make the suction cup 404 adsorb on the surface of the workpiece. The second driving motor 503 drives the threaded shaft 502 to rotate, and the telescopic member 504 drives the cleaning soft brush 505 to move up and down along the threaded shaft 502 to complete the grinding of the workpiece surface. S2: The telescopic end of the electric telescopic rod 4051 is extended, and the probe 4053 is close to the surface of the workpiece. At this time, the programmable logic controller 103 controls the emission of ultrasonic waves for flaw detection; S3: After the flaw detection is completed, the telescopic end of the electric telescopic rod 4051 is retracted, and the negative pressure pump 402 works to destroy the negative pressure between the suction cup 404 and the workpiece; S4: The first driving motor 203 drives the rotating shaft 201 to rotate, and the winding roller 202 winds up the wire 204. At the same time, the transmission member 303 drives the lead screw 301 to rotate synchronously, and the guide member 302 guides the winding process.

[0042] After the flaw detection monitoring is completed, the first drive motor 203 drives the rotating shaft 201 to rotate, and the winding roller 202 winds up the wire 204. At the same time, the transmission member 303 drives the screw rod 301 to rotate synchronously. At this time, the guide member 302 moves along the screw rod 301 to guide the winding process of the wire 204, thereby avoiding the wire 204 from being entangled and scattered, and ensuring convenient use next time.

[0043] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A portable ultrasonic flaw detection device and a method of using the same, comprising a main unit (1), characterized in that: It also comprises a winding unit (2) and a guiding unit (3) arranged inside the main unit (1), and a detection unit (4) and a cleaning unit (5) arranged on the side of the main unit (1); The winding unit (2) comprises a rotating shaft (201) movably mounted inside the main unit (1), a winding roller (202) mounted on a side wall of the rotating shaft (201), a first driving motor (203) mounted on an input end of the winding roller (202), and a conducting wire (204) mounted on a side wall of the winding roller (202); The guide unit (3) comprises a screw rod (301) movably mounted inside the main unit (1) and located below the rotating shaft (201), a guide member (302) arranged on the screw rod (301), and a transmission member (303) arranged between the rotating shaft (201) and the screw rod (301); The cleaning unit (5) comprises a fixing seat (501) mounted on the side wall of the detection unit (4), a threaded shaft (502) movably mounted in the fixing seat (501), a second driving motor (503) mounted at the input end of the threaded shaft (502), a telescopic member (504) disposed on the threaded shaft (502), and a cleaning soft brush (505) mounted at the telescopic end of the telescopic member (504).

2. A portable ultrasonic flaw detection device and a method of using the same according to claim 1, characterized in that: The main unit (1) comprises a main body (101) and a display screen (102) disposed on the surface of the main body (101).

3. A portable ultrasonic flaw detection device and a method of using the same according to claim 2, characterized in that: The main unit (1) further comprises a programmable logic controller (103) installed inside the main body (101).

4. The portable ultrasonic flaw detection device and the method of using the same according to claim 1, characterized in that: The guide member (302) comprises a moving member (3021) mounted on the side surface of the screw rod (301), and a guide seat (3022) mounted on the side wall of the moving member (3021).

5. The portable ultrasonic flaw detection device and the method of using the same according to claim 1, characterized in that: The transmission member (303) comprises a pulley (3031) mounted on the side wall of the rotating shaft (201) and the screw rod (301), and a transmission belt (3032) movably mounted between the two pulleys (3031).

6. The portable ultrasonic flaw detection device and the method of using the same according to claim 1, characterized in that: The detection unit (4) comprises a protective cover (401) installed at the end of the wire (204), a negative pressure pump (402) installed on the side wall of the protective cover (401), a connecting pipe (403) installed at the output end of the negative pressure pump (402), a suction cup (404) installed at the opposite end of the connecting pipe (403) and the negative pressure pump (402), and a detection member (405) arranged inside the protective cover (401).

7. A portable ultrasonic flaw detection device and a method of using the same according to claim 6, characterized in that: The detection member (405) comprises an electric telescopic rod (4051) mounted on the inner bottom wall of the protective cover (401), a mounting plate (4052) mounted on the telescopic end of the electric telescopic rod (4051), and a probe (4053) mounted on the mounting plate (4052).

8. The portable ultrasonic flaw detection device and the method of using the same according to claim 1, characterized in that: The telescopic member (504) comprises a movable seat (5041) mounted on the circumferential side of the threaded shaft (502), a fixed cylinder (5042) mounted on the side wall of the movable seat (5041), a connecting spring (5043) mounted on the inner bottom wall of the fixed cylinder (5042), and a connecting rod (5044) mounted on the end of the connecting spring (5043) and fixedly connected to the cleaning soft brush (505).

9. The portable ultrasonic flaw detection device and the method of using the same according to claim 1, characterized in that: The cleaning unit (5) comprises a limiting washer (506) mounted on the inner side wall of the fixing seat (501), and the limiting washer (506) is sleeved on the peripheral side surface of the threaded shaft (502).

10. A portable ultrasonic flaw detection device and a method of using the same according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: releasing the wire (204) so ​​that the protective cover (401) is close to the workpiece to be tested. When the suction cup (404) contacts the workpiece, the negative pressure pump (402) works so that the suction cup (404) is adsorbed on the surface of the workpiece. The second driving motor (503) drives the threaded shaft (502) to rotate, and the telescopic member (504) drives the cleaning soft brush (505) to move up and down along the threaded shaft (502), thereby completing the grinding of the workpiece surface. S2: The telescopic end of the electric telescopic rod (4051) is extended, and the probe (4053) is close to the surface of the workpiece. At this time, the programmable logic controller (103) controls the emission of ultrasonic waves for flaw detection; S3: After the flaw detection is completed, the telescopic end of the electric telescopic rod (4051) is retracted, and the negative pressure pump (402) works to destroy the negative pressure between the suction cup (404) and the workpiece; S4: The first driving motor (203) drives the rotating shaft (201) to rotate, and the winding roller (202) winds up the wire (204). At the same time, the transmission member (303) drives the lead screw (301) to rotate synchronously, and the guide member (302) guides the winding process.

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