An online ultrasonic flaw detection device

Abstract

An online ultrasonic flaw detection device relates to the technical field of material surface quality detection, and includes: a supporting base; a lifting cavity, one end of which is connected to the supporting base, and the end of the lifting cavity away from the supporting base is provided with a cavity opening; a traction frame, one end of which is movably arranged in the lifting cavity through the cavity opening; a positioning member, which is arranged on the traction frame and is used to push one end of the traction frame into the lifting cavity when it contacts a protrusion on a panel to be detected; a probe, which is arranged on the traction frame and is located downstream of the positioning member; wherein a trigger part is provided at the end of the part of the traction frame that penetrates into the lifting cavity, and a sensing part is provided in the lifting cavity, and when the trigger part triggers the sensing part, the lifting cavity controls the traction frame to further penetrate into the lifting cavity; the present invention can effectively prevent the probe from being damaged.

Description

Technical Field

[0001] The invention relates to the technical field of material surface quality detection, and in particular to an online ultrasonic flaw detection device. Background Art

[0002] Nondestructive testing is a testing method that does not damage or affect the performance of the object being tested. It does not damage the internal structure of the object being tested. It is usually a test device that detects changes in heat, sound, light, point, magnetism, etc. caused by abnormalities or defects in the internal structure of the material of the object being tested in a chemical or physical way. Nondestructive testing mainly includes radiographic testing (RT), ultrasonic testing (UT), magnetic particle testing (MT) and liquid penetrant testing (PT). Among them, ultrasonic testing uses ultrasonic waves for flaw detection. The transmitting probe transmits ultrasonic waves to the surface of the component through a coupling agent. When the ultrasonic wave propagates inside the component, it will encounter different interfaces and will have different reflection signals. The time difference between the different reflection signals transmitted to the probe can be used to detect defects inside the component.

[0003] Instruments that use ultrasonic testing include devices that move the sensor relative to a fixed object and devices that move the object relative to a fixed sensor. Generally speaking, devices that move the object in a fixed sensor direction are more suitable for detecting the flatness of the surface of horizontally pushed metal sheets.

[0004] For example, the Chinese utility model patent with application number CN201621446998.9 discloses a steel plate ultrasonic automatic flaw detection device edge detection flaw detection mechanism, which includes a walking upright that can move in a direction perpendicular to the travel direction of the steel plate, a probe that can be raised and lowered in a direction perpendicular to the surface of the steel plate is provided on the walking upright, and a photoelectric sensor for sensing the position of the steel plate is provided at one end of the walking upright, the walking upright is moved by means of a pneumatic motor, the probe is raised and lowered by means of a cylinder, and the photoelectric sensor is used to control the pneumatic motor and the cylinder. The mechanism has a simple structure, and controls the pneumatic motor and the cylinder to perform corresponding actions by detecting whether the steel plate is in place through a photoelectric sensor, with high repetition accuracy, and the edge wheel rotates with the translation of the steel plate, with good stability and reliability, and there is enough space for maintenance and replacement of parts, which is easy to maintain and has a low failure rate.

[0005] The closer the ultrasonic probe is to the detection object, the higher its detection accuracy is. In the above technical solution, the distance between the probe and the steel plate can be adjusted by raising and lowering the probe to achieve a suitable detection position. In actual detection, some steel plates may have some more serious protrusions, such as the protrusions caused by welds. The existence of these protruding welds or other protruding defects makes it easy for the probe to hit the protrusions when the probe is set too low, especially when it is set close to the surface of the steel plate, causing damage to the probe. There are relatively many such defects on the steel plate, and manual avoidance by manual observation and adjustment alone cannot ensure that every defect can be observed. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides an online ultrasonic flaw detection device which can automatically avoid large defects on steel plates, thereby effectively preventing the probe from being damaged.

[0007] An online ultrasonic flaw detection device includes: a supporting base; a lifting cavity, one end of which is connected to the supporting base, and the end of the lifting cavity away from the supporting base is provided with a cavity opening; a traction frame, one end of which is movably arranged in the lifting cavity through the cavity opening; a positioning member, which is arranged on the traction frame and is used to push one end of the traction frame into the lifting cavity when it contacts a protrusion on a panel to be inspected; a probe, which is arranged on the traction frame and is located downstream of the positioning member; wherein a trigger part is provided at the end of the part of the traction frame that penetrates into the lifting cavity, and a sensing part is provided in the lifting cavity, and when the trigger part triggers the sensing part, the lifting cavity controls the traction frame to further penetrate into the lifting cavity.

[0008] As a preferred embodiment of the above technical solution, the traction structure includes a detection column and a telescopic column, one end of the telescopic column is arranged in the lifting cavity, the other end of the telescopic column is hinged to the detection column, the opposite end of the detection column and the connecting end of the telescopic column is hinged to the supporting base, the detection piece is arranged at the hinge between the telescopic column and the detection column, and the probe is arranged on the detection column.

[0009] As a preferred embodiment of the above technical solution, the sensing part is a magnetic sensing area formed by an outer magnetic sensing ring arranged outside the lifting cavity, the triggering part is an inner magnetic sensing ring arranged on the traction structure, and the outer magnetic sensing ring is coaxially arranged with the inner magnetic sensing ring.

[0010] As a preferred embodiment of the above technical solution, the outside of the probe is covered with a protective layer, and the protective layer is provided with a lifting angle toward the direction of the positioning member.

[0011] As a preferred embodiment of the above technical solution, the supporting base includes a positioning cylinder, a base column, a directional slide and a supporting member, the supporting member is fixedly arranged below the base column, the base column is slidably connected to the directional slide, and the positioning cylinder is arranged above the base column, and the positioning cylinder cooperates with the directional slide to control the movement of the base column in the vertical direction.

[0012] As a preferred embodiment of the above technical solution, both the abutting member and the position detecting member are wheel-shaped members that can rotate around their own central axes.

[0013] As a preferred embodiment of the above technical solution, the end of the traction structure inserted into the lifting cavity is a piston, the piston is located in the lifting cavity, and the piston divides the interior of the lifting cavity into a rod cavity and a rodless cavity, wherein the traction structure is partially located in the rod cavity, and the lifting cavity also includes a reversing air valve, which controls the air pressure in the rod cavity.

[0014] As a preferred embodiment of the above technical solution, a limiting portion is provided on the magnetic induction outer ring, and the magnetic induction outer ring is movably arranged on the lifting cavity, and the limiting portion is used to limit the position of the magnetic induction outer ring on the outer surface of the lifting cavity.

[0015] In summary, the present invention has the following advantages:

[0016] 1. The flaw detection equipment of the present application can detect large defects on the surface of the steel plate in advance, and raise the probe in advance to prevent the probe from touching the defect and causing damage;

[0017] 2. Furthermore, the entire structure is a stable triangular structure with a certain structural strength, but one side of the triangular structure is a telescopic rod with a contraction function, and the vertices of the three sides of the triangular structure are all hinged, so that when one side of the structure has a surface on the length, the internal angle of the triangular structure will be pulled to change, which has the effect of lifting the probe under the premise of a stable structure;

[0018] 3. Furthermore, under the premise of ensuring that the probe can avoid large defects on the surface of the steel plate, the structure is made as close to the surface of the steel plate as possible for detection to improve the detection accuracy.

[0019] Further or other detailed benefits will be discussed in the examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the relative positions of various structures when the embodiment of the present application is in an initial state;

[0021] Figure 2 It is a schematic diagram of the relative position when the structure encounters defects;

[0022] Figure 3This is a schematic diagram of the relative position of the structure after rapid lifting;

[0023] Figure 4 for Figure 1 Enlarged view of area A in the middle;

[0024] Figure 5 Schematic diagram of defective steel plate. DETAILED DESCRIPTION

[0025] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0026] The present invention will be further explained below in conjunction with embodiments:

[0027] The online ultrasonic flaw detection device mentioned in any embodiment of the present application is not moving as a whole, and can be used to detect the surface quality of steel plates transported on a conveyor roller (or other stable transport structure), please refer to Figure 5 In this embodiment, there is a raised weld S-1 on the steel plate S tested. The steel plate S moves relative to the online ultrasonic flaw detection equipment to achieve surface flatness detection. The steel plate surface near the weld S-1 does not need to be tested for flatness, but during the detection, it is necessary to ensure that the probe 5 does not touch the weld S-1.

[0028] Example:

[0029] An online ultrasonic flaw detection device, please refer to Figure 1-Figure 4, including a supporting base 1, a lifting cavity 2, a traction mechanism 3, a position detection member 4 and a probe 5. The supporting base 1 is fixed to the ground as a whole by a bracket, and can also be fixed to a wall. The lifting cavity 2 is a columnar member with a cavity inside. One end of the lifting cavity 2 is connected to the supporting base 1, and the end of the lifting cavity 2 away from the supporting base 1 is provided with a cavity opening; the traction mechanism 3 is composed of two straight rods, which are a telescopic column 32 and a detection column 31, wherein a part of one end of the telescopic column 32 is provided through the cavity opening of the lifting cavity 2. In the lifting cavity 2, the other end of the telescopic column 32 is fixedly connected to the detection column 31, and the detection component 4 is arranged at the junction of the telescopic column 32 and the detection column 31. The detection component 4 is a wheel-shaped structure that can rotate around its own central axis. The probe 5 is arranged on the detection column 31 and is located downstream of the detection component 4; a trigger part a-1 is arranged at the end of the part of the traction frame 3 that penetrates into the lifting cavity 2, and a sensing part a-2 is arranged in the lifting cavity 2. When the trigger part a-1 triggers the sensing part a-2, the lifting cavity 2 controls the traction frame 3 to further penetrate into the lifting cavity 2.

[0030] As a preferred embodiment, the lifting cavity 2 adopts a single-acting spring return cylinder, and the end of the traction mechanism 3 that penetrates into the lifting cavity 2 is a piston 33. The piston 33 divides the lifting cavity 2 into a rod cavity 21 and a rodless cavity 22, wherein the traction structure 3 is partially located in the rod cavity 21; a magnetic induction inner ring 61 is provided on the top of the piston 33, and the magnetic induction inner ring 61 serves as the triggering part a-1 of this embodiment, and an annular magnetic induction outer ring 62 is provided on the outside of the lifting cavity 2, and the inner circle of the magnetic induction outer ring 62 forms a magnetic induction area located inside the lifting cavity 2, and the above-mentioned magnetic induction area is the induction part a-2 of this embodiment, and the magnetic induction outer ring 62 is coaxially arranged with the magnetic induction inner ring 61, and in the initial state, the magnetic induction inner ring 61 is not in contact with the rod cavity 21. The magnetic induction area of ​​the outer magnetic ring 62 is touched, that is, there is a gap between the outer magnetic ring 62 and the inner magnetic ring 61. Only when the inner magnetic ring 61 is lifted can the magnetic induction area of ​​the outer magnetic ring 62 be touched to cause electromagnetic induction. The electromagnetic induction effect between the inner magnetic ring 61 and the outer magnetic ring 62 is mainly used to control the reversing air valve 7 which is also arranged on the lifting cavity 2. The reversing air valve 7 is an electromagnetic induction air valve. When electromagnetic induction occurs between the inner magnetic ring 61 and the outer magnetic ring 62, the electromagnetic reversing air valve is actuated, and compressed air is injected into the rod cavity 21. The air pressure difference formed between the rod cavity 21 and the rodless cavity 22 enables the piston 33 to drive the traction mechanism 3 further into the lifting cavity 2.

[0031] Based on the above arrangement, when the wheel-shaped position detector 4 passes through the weld S-1 on the steel plate S, Figure 2In the middle position relationship, the positioning member 4 drives the telescopic rod 32 to lift upward and penetrate into the lifting chamber 2, and the gap between the magnetic inner ring 61 and the magnetic outer ring 62 gradually decreases. If the weld S-1 is high enough (this height may damage the probe 5 located downstream of the positioning member 4 during the further movement of the steel plate S), the electromagnetic induction is triggered, the electromagnetic reversing air valve is actuated, and compressed air is injected into the rod cavity 21. The telescopic column 32 and the positioning member 4 are driven to further lift, and the detection column 31 and the probe 5 located on the detection column 31 are lifted upward to prevent the probe from touching the weld S-1 and causing damage. The position relationship is as follows: Figure 3 shown.

[0032] In addition, a limiting portion is provided on the magnetic induction outer ring 62, and the magnetic induction outer ring 62 is movably arranged on the lifting cavity 2. The limiting portion includes a threaded through hole opened on the magnetic induction outer ring 62 and a positioning bolt. The positioning bolt positions the magnetic induction outer ring 62 on the lifting cavity 2 through the threaded through hole of the magnetic induction outer ring 62. The above-mentioned setting method enables the magnetic induction outer ring 62 to have a certain position adjustment capability, so that the initial gap between the magnetic induction outer ring 62 and the magnetic induction inner ring 61 can be adjusted.

[0033] Specifically, one end of the telescopic column 32 is disposed inside the lifting cavity 2 , the other end of the telescopic column 32 is hinged to the detection column 31 , and the end opposite to the connection end of the detection column 31 and the telescopic column 32 is hinged to the support base 1 . Due to the mutual hinged relationship between the detection column 31, the support base 1, the telescopic column 32 and the lifting cavity 2, the above four can be regarded as a deformable triangular structure. When the telescopic column 32 shrinks into the lifting cavity 2, the length of the triangular structure located at the telescopic column 32 and the lifting cavity 2 gradually decreases, the length of one side of the triangular structure decreases, and the other two sides do not change. Since the three vertices of the triangular structure are all hinged structures, when one side is deformed, the entire triangular structure can maintain the balance of the triangular structure by changing its internal angle. In this embodiment, the support base 1 is a fixed structure, so when the telescopic column 32 shrinks, it will drive the detection column 31 to move upward. Since the other end of the detection column 31 is hinged and fixed, the detection column 31 is relatively fixed to the connecting end of the support base 1, and the hinged end of the detection column 31 and the telescopic column 32 moves upward, resulting in a unilateral tilting effect, so that the positioning member 4, the detection column 31 and the probe 5 arranged on the detection column 31 avoid the weld S-1.

[0034] To be more specific, the supporting base 1 includes a positioning cylinder 11, a base column 12, a directional slide 13 and a supporting member 14; the supporting member 14 is arranged below the base column 12, and is a wheel-shaped member that is the same as the positioning member 4; the directional slide 13 is a directional guide rail, and the base column 12 is movably arranged on the directional slide 13, and the top of the base column 12 is connected to the positioning cylinder 11, wherein the positioning cylinder 11 and the directional slide 13 are both fixed by a bracket, and under the action of the positioning cylinder 11, the base column 12 moves up and down under the guidance of the directional slide 13. The main function of the above-mentioned arrangement is that, for steel of different plate thicknesses, the online ultrasonic flaw detection equipment of this embodiment can adjust its own height as needed, and make itself as close as possible to the steel to be detected, so that the detection accuracy of the ultrasonic probe is more accurate.

[0035] Preferably, the outside of the probe 5 is covered with a protective cover made of polytetrafluoroethylene, and an angle 51 is provided at the junction of the end face of the probe 5 facing the positioning member 4 and the ground of the protective cover. The function of the angle 51 is: when the weld S-1 encountered by the positioning member 4 is too small, the weld S-1 cannot lift the magnetic induction inner ring 61 to the magnetic induction outer ring 62 when the positioning member 4 is lifted, and the electromagnetic reversing gas valve cannot be triggered. At this time, it may be that the weld is well processed and the weld is relatively flat, which does not affect the positioning member 4 triggering the electromagnetic reversing gas valve and will not touch the protective cover of the probe 5. However, it is also possible that the height of the weld does not affect the positioning member 4 triggering the electromagnetic reversing gas valve but will touch the protective cover of the probe 5. At this time, the bevel 51 of the protective cover provides a guiding function. Under the guidance of the bevel 51, the weld gradually lifts the probe 5. For the detection column 31, its lifting fulcrum is the hinge point with the supporting base 1. When the same weld protrusion passes through the positioning member 4 and the bevel 51, the lifting amount of the detection column 31 away from the lifting fulcrum is different. Since the probe 5 is closer to the lifting fulcrum than the positioning member 4, the lifting amount of the bevel 51 is higher. Therefore, when passing through the bevel 51, the amount of the telescopic column 32 penetrating into the lifting cavity 2 is greater than the amount when passing through the positioning member 4. The secondary lifting here can trigger the electromagnetic reversing gas valve, so that the telescopic column 32 drives the detection column 31 to further lift, thereby allowing the probe 5 to avoid the weld.

[0036] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0037] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An online ultrasonic flaw detection device, characterized in that: Included are: Support base (1); A lifting cavity (2), one end of which is connected to the supporting base (1), and an end of the lifting cavity (2) away from the supporting base (1) is provided with a cavity opening; A traction frame (3), one end of which is movably disposed in the lifting cavity (2) through the cavity opening; A position detection member (4) is arranged on the traction frame (3) and is used to push one end of the traction frame (3) deep into the lifting cavity (2) when the traction frame (4) contacts a protrusion on the panel to be detected; A probe (5) is arranged on the traction frame (3) and is located downstream of the position detection member (4); The end of the portion of the traction structure (3) that penetrates into the lifting cavity (2) is provided with a trigger portion (a-1), and the lifting cavity (2) is provided with a sensing portion (a-2); when the trigger portion (a-1) triggers the sensing portion (a-2), the lifting cavity (2) controls the traction structure (3) to further penetrate into the lifting cavity (2); The traction structure (3) comprises a detection column (31) and a telescopic column (32), one end of the telescopic column (32) is arranged in the lifting cavity (2), the other end of the telescopic column (32) is hinged to the detection column (31), the end opposite to the connection end of the detection column (31) and the telescopic column (32) is hinged to the support base (1), the position detection member (4) is arranged at the hinge between the telescopic column (32) and the detection column (31), and the probe (5) is arranged on the detection column (31); The induction part (a-2) is a magnetic induction area formed by an outer magnetic induction ring (62) arranged outside the lifting cavity (2), and the trigger part (a-1) is an inner magnetic induction ring (61) arranged on the traction structure (3), and the outer magnetic induction ring (62) and the inner magnetic induction ring (61) are coaxially arranged; A limiting portion is provided on the magnetic induction outer ring (62), and the magnetic induction outer ring (62) is movably arranged on the lifting cavity (2), and the limiting portion is used to limit the position of the magnetic induction outer ring (62) on the outer surface of the lifting cavity (2).

2. The online ultrasonic flaw detection equipment according to claim 1, characterized in that: The probe (5) is coated with a protective layer on the outside, and the protective layer is provided with a lifting angle (51) in a direction toward the position detection member (4).

3. The online ultrasonic flaw detection equipment according to claim 1, characterized in that: The supporting base (1) comprises a positioning cylinder (11), a base column (12), a directional slide (13) and a supporting member (14); the supporting member (14) is fixedly arranged below the base column (12); the base column (12) is slidably connected to the directional slide (13); and the positioning cylinder (11) is arranged above the base column (12); the positioning cylinder (11) cooperates with the directional slide (13) to control the movement of the base column (12) in the vertical direction.

4. The online ultrasonic flaw detection equipment according to claim 3 is characterized in that: The abutting member (14) and the position detecting member (4) are both wheel-shaped members that can rotate around their own central axes.

5. The online ultrasonic flaw detection equipment according to claim 1, characterized in that: The end of the traction structure (3) inserted into the lifting cavity (2) is a piston (33), and the piston (33) is located in the lifting cavity (2). In addition, the piston (33) divides the interior of the lifting cavity (2) into a rod cavity (21) and a rodless cavity (22), wherein the traction structure (3) is partially located in the rod cavity (21), and the lifting cavity (2) further includes a reversing air valve (7), and the reversing air valve (7) controls the air pressure in the rod cavity (21).

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