Steel structure nondestructive flaw detection device

Abstract

The invention relates to the technical field of nondestructive testing, and particularly discloses a steel structure nondestructive flaw detection device which is characterized in that a rotating shaft is rotatably arranged on a carrier plate of a supporting assembly, a base frame is mounted on the rotating shaft through a swing rod, two wheel sets are mounted at the bottom of the base frame, a sliding block used for mounting a detection head is slidably arranged in the base frame, and a smearing piece is arranged on one side of the detection head; a second driving part is rotationally arranged in the base frame, a pressing pump is arranged in the base frame, one end of the pressing pump is connected with the smearing part through a pipeline, and the other end of the pressing pump is connected with the storage tank through a pipeline. When the wheel set rotates, the base frame can do circular motion in the steel pipe around the rotating shaft, and the second driving piece can rotate and drive the sliding block to do reciprocating motion in the direction parallel to the axis of the steel pipe, so that the pressing pump can convey the coupling agent in the material storage tank to the smearing piece through a pipeline, and the coupling agent is smeared to one side of a weld joint. The detection head can abut against the part, coated with the coupling agent, of the inner wall of the steel pipe so as to detect the weld joint. The device is beneficial to efficient flaw detection of the weld joint of the steel pipe.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing, and in particular to a nondestructive flaw detection device for a steel structure. Background Art

[0002] Ultrasonic nondestructive testing is a major method for nondestructive testing of existing steel structures. It uses an oblique probe to test the surface of a steel structure coated with a coupling agent. In major project engineering, large-diameter pipelines are usually laid. The "Standards for Acceptance of Construction Quality of Steel Structure Engineering" stipulates that first-level welds need to be fully inspected and more than 20% of second-level welds need to be sampled. Due to the large diameter of the welded pipes, it is very inconvenient to perform manual nondestructive testing on the welds of the pipes.

[0003] A Chinese patent with publication number CN113092582A discloses a nondestructive testing device for steel structures, comprising an annular track, a fixing device for fixing the annular track on a steel pipe, a movable frame installed on the annular track, a detection device for detecting damage to the steel pipe, and a driving device for driving the movable frame to move. The annular track is slidably matched with a sliding member, the movable frame is hinged to the sliding member, the movable frame is slidably connected to the annular track, the detection device and the driving device are both installed on the movable frame, the detection device comprises a transmitter for transmitting a detection signal, a receiver for receiving the detection signal, and a processing terminal for processing the detection signal, and the detection signal is received by the receiver and transmitted to the processing terminal.

[0004] During the implementation of the above technical solution, the circular track needs to be installed on the steel pipe first. Since the structure of the circular track is relatively complex, it is inconvenient to disassemble and assemble, which is not conducive to efficient work. In addition, the equipment is suitable for testing when the steel pipe is in a suspended state. If the steel pipe is in contact with the ground, it is necessary to support the steel pipe to a suitable height before subsequent work can be carried out. Therefore, the equipment has great limitations and is inconvenient to operate. Summary of the invention

[0005] The present invention provides a nondestructive flaw detection device for a steel structure, aiming to solve the problem in the related art that it is difficult to perform efficient flaw detection on the weld of a steel pipe.

[0006] A non-destructive flaw detection device for steel structures comprises a support assembly arranged in a steel pipe, the support assembly comprises a carrier plate, two base plates slidably connected to the carrier plate, and a driving member rotatably connected to the carrier plate, the upper and lower ends of the carrier plate are respectively provided with support plates for abutting against the inner wall of the steel pipe, the support plate is connected to the two base plates through a telescopic frame, when the driving member 1 rotates, the two base plates can simultaneously approach or move away from the carrier plate, so that the two support plates move away from or approach each other; a rotating shaft is rotatably arranged on the carrier plate, when the two support plates respectively abut against the inner wall of the steel pipe, the rotating shaft is coaxial with the steel pipe, a base frame is installed on the rotating shaft through a rocker, and two wheels are installed at the bottom of the base frame A group, a slider for installing a detection head is slidably provided in the base frame, a smear piece is provided on one side of the detection head, a driving piece 2 is rotatably provided in the base frame, a pressing pump is provided in the base frame, one end of the pressing pump is connected to the smear piece through a pipeline, and the other end is connected to the storage tank through a pipeline; when the wheel group rotates, the base frame can make a circular motion around the rotating axis in the steel pipe, the driving piece 2 can rotate and drive the slider to reciprocate along the axial direction parallel to the steel pipe, so that the pressing pump can transport the coupling agent in the storage tank through the pipeline to the smear piece and be smeared to one side of the weld, and the detection head can stop at the part of the inner wall of the steel pipe where the coupling agent has been applied to detect the weld.

[0007] The support assembly in the present invention can be suitable for steel pipes of different sizes within a certain range, and the support assembly is easy and efficient to install. In addition, the support assembly can quickly position the base frame. During the movement of the base frame on the inner wall of the steel pipe, the coating member can automatically apply the coupling agent, and then the detection head can detect the part where the coupling agent has been applied, without the need for manual coating and detection, thereby improving the detection efficiency.

[0008] Preferably, the slider is slidably connected to the base frame through an elastic member, the pump head of the pressing pump is fixedly connected to the slider, and the pump body of the pressing pump is fixedly connected to the base frame, so that during the reciprocating movement of the slider, the pressing pump can transport the coupling agent in the storage tank through the pipeline to the application member and apply it to one side of the weld.

[0009] Preferably, the detection head is slidably connected to the slider via elastic member 2, so that the detection head can move toward or away from the inner wall of the steel pipe, so that the detection head can always stop against the inner wall of the steel pipe, facilitating smooth detection.

[0010] Preferably, along the rotation direction of the base frame, the coating member is located in front of the detection head, so as to realize detection while coating, avoiding the situation in which the coupling agent is first coated on the inner wall of the steel pipe and then the coupling agent is dried when the detection head is used for detection in traditional detection, thereby affecting the smooth progress of the detection.

[0011] Preferably, a plurality of guide parts one and guide parts two cooperating with the slider are alternately provided on the driving member 2 along its circumference, so that the slider can reciprocate when the driving member 2 rotates.

[0012] Preferably, the wheel set includes an axle rod slidably connected to the base frame and rollers respectively arranged at both ends of the axle rod, and the base frame has mounting plates at both ends along the axial direction of the steel pipe, and the two mounting plates are respectively provided with guide grooves for the sliding of the axle rod.

[0013] Preferably, the shafts in the two wheel sets are connected via three elastic members.

[0014] Preferably, a motor is installed in the base frame, and the output shaft of the motor is connected to the second driving member and one of the shaft rods respectively through chain transmission, and the guide groove is an arc-shaped structure with the output shaft of the motor as the axis.

[0015] Preferably, the telescopic frame is a scissor-type structure, the telescopic frame is rotatably connected to the two base plates, the support plate is rotatably connected to the end of the telescopic frame, the support plate is provided with an elastic anti-skid pad that cooperates with the inner wall of the steel pipe, one of the base plates is fixedly provided with a guide rod for sliding of the carrier plate and the other base plate, the driving member is a bidirectional screw rod, the two base plates are respectively cooperated with two parts of the bidirectional screw rod with different threads in rotation direction, the driving member is provided with a ring plate that rotatably cooperates with the carrier plate, a plurality of limit grooves are provided on the ring plate along its circumference, and a limit rod that cooperates with the limit groove is slidably provided on the carrier plate through the elastic member four.

[0016] Preferably, the swing rod comprises a plurality of connecting sections connected in sequence, one end of the swing rod is connected to the rotating shaft, and the other end of the swing rod is connected to the base frame.

[0017] By adopting the above technical scheme, the present invention sets a freely extendable support component, so that the detection device as a whole can be suitable for detecting steel pipes of different sizes within a certain range, and the disassembly and assembly are convenient; when the output shaft of the motor rotates, the roller and the second driving member can rotate, and the base frame can make a circular motion around the rotating axis in the steel pipe. During this process, the second driving member can drive the slider to reciprocate in the direction parallel to the axis of the steel pipe, so that the pressing pump can transport the coupling agent in the storage tank through the pipeline to the application member and be applied to one side of the weld of the inner wall of the steel pipe. Then, the detection head can stop at the part of the inner wall of the steel pipe where the coupling agent is applied to detect the weld. The entire detection can be realized during the rotation of the base frame around the rotating axis, which is convenient to operate and has high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the present invention along the axial direction of the steel pipe.

[0020] Figure 3 It is a cross-sectional view of the steel pipe of the present invention.

[0021] Figure 4 It is a schematic structural diagram of the support assembly of the present invention.

[0022] Figure 5 It is a schematic structural diagram of a driving member 1 of the present invention.

[0023] Figure 6 It is a cross-sectional view of the carrier plate of the present invention.

[0024] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0025] Figure 8 It is a structural schematic diagram of the bottom of the base frame of the present invention.

[0026] Fig. 9 It is a schematic diagram of the structure inside the base frame of the present invention.

[0027] Fig.10 It is a cross-sectional view of the base frame of the present invention.

[0028] 1. The invention relates to a pump body; a pump body; a pump housing ... DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] refer to Figure 1-Figure 7A nondestructive flaw detection device for steel structure, comprising a support assembly arranged in a steel pipe 10 and a base frame 30 installed on the support assembly, the support assembly comprising a carrier plate 20, two base plates 21 slidably connected to the carrier plate 20, and a driving member 22 rotatably connected to the carrier plate 20, wherein two guide rods 26 for sliding between the carrier plate 20 and the other base plate 21 are fixedly arranged on one base plate 21, the two guide rods 26 are arranged in parallel, the driving member 22 is a bidirectional screw rod, and the bidirectional screw rod is close to the guide rod 26 and the base plate One end of the base plate 21 is fixedly connected with the base plate 21, and the two base plates 21 are respectively matched with the two parts of the two-way screw with different threads. A ring plate 27 that is rotatably matched with the carrier plate 20 is coaxially fixed on the driving member 22, and a plurality of limit grooves 271 are provided on the ring plate 27 along its circumference. A limit rod 28 that is matched with the limit groove 271 is slidably provided on the carrier plate 20 through an elastic member 281. The elastic member 281 is a spring, and the limit rod 28 has an arc-shaped guide portion 280 at one end facing the limit groove 271.

[0031] Therefore, when the staff holds the carrier 20 with one hand and rotates the handle 221 in the positive direction with the other hand, the driving member 22 can drive the two substrates 21 to approach the carrier 20 at the same time. In this process, when the limiting rod 28 is inserted into one of the limiting grooves 271, as the driving member 22 rotates, the limiting rod 28 can be separated from the limiting groove 271 under the action of the arc-shaped guide part 280 and the elastic member 281, and then as the driving member 22 rotates, the limiting rod 28 can enter the next adjacent limiting groove 271 under the action of the elastic member 281. 71, so that the limiting rod 28 passes through the multiple limiting grooves 271 on the ring plate 27 in sequence, and when the handle 221 stops rotating, the limiting rod 28 will enter one of the limiting grooves 271 to prevent the driving member 22 from rotating on its own; it can be understood that when the staff holds the carrier 20 with one hand and rotates the handle 221 in the opposite direction with the other hand, the driving member 22 can drive the two substrates 21 away from the carrier 20 at the same time, and when the handle 221 stops rotating, the limiting rod 28 will enter one of the limiting grooves 271 to prevent the driving member 22 from rotating on its own.

[0032] A telescopic frame 24 is respectively provided on opposite sides of the base plate 21 along the axial direction of the steel pipe 10. The telescopic frame 24 is rotatably connected to the two base plates 21. The telescopic frame 24 adopts the existing scissor-type structure. The use of two telescopic frames 24 is more conducive to the stability of the supporting assembly. The upper and lower ends of the telescopic frame 24 are respectively rotatably provided with a support plate 23 for abutting against the inner wall of the steel pipe 10. The side of the support plate 23 facing the inner wall of the steel pipe 10 has an elastic anti-skid pad 231 that cooperates with the inner wall of the steel pipe 10. A rotating shaft 25 for installing the base frame 30 is rotatably provided on the carrier plate 20; therefore, when the staff holds the carrier plate 20 with one hand and rotates the handle 221 in the positive direction with the other hand, the two support plates 23 can The two support plates 23 can be moved away from each other, and the telescopic frame 24 can be extended. When the two support plates 23 are close to the inner wall of the steel pipe 10, another staff member manually corrects the position of the two support plates 23 so that the elastic anti-skid pads 231 on the two support plates 23 are tightly stopped against the inner wall of the steel pipe 10, and the elastic anti-skid pads 231 will be squeezed and deformed. At this time, the support assembly is fixed in the steel pipe 10, and the rotating shaft 25 is in a coaxial state with the steel pipe 10. It can be understood that when the staff member holds the carrier plate 20 with one hand and rotates the handle 221 in the opposite direction with the other hand, the two support plates 23 can be close to each other and the telescopic frame 24 can be retracted to store the support assembly.

[0033] refer to Figure 1-Figure 4 as well as Figure 8-Figure 10 A base frame 30 is installed on the rotating shaft 25 through a rocker arm. The rocker arm includes a plurality of connecting sections 29 which are fixedly connected in sequence by bolts. The end of the rotating shaft 25 away from the carrier plate 20 has a connecting plate 251. One end of the rocker arm is fixedly connected to the connecting plate 251 by bolts, and the other end of the rocker arm is fixedly connected to the base frame 30 by bolts. It can be understood that different numbers of connecting sections 29 can be used according to the different inner diameters of the steel pipe 10 so that the base frame 30 can be installed in a position close to the inner wall of the steel pipe 10.

[0034] Two wheel groups are installed at the bottom of the base frame 30, and the wheel groups include a shaft rod 40 slidably connected to the base frame 30 and rollers 41 respectively installed at both ends of the shaft rod 40. The base frame 30 has mounting plates 34 at both ends along the axis direction of the steel pipe 10, and the two mounting plates 34 are respectively provided with guide grooves 341 for the shaft rod 40 to slide. In this embodiment, guide rings 43 are coaxially fixed at both ends of the shaft rod 40, and the guide rings 43 are slidably arranged in the guide grooves 341, so that the axes of the two shaft rods 40 are always kept in a parallel state during the movement of the two shaft rods 40 in the corresponding guide grooves 341; the shaft rods 40 in the two wheel groups are connected by elastic members 42 The two ends of the elastic member 42 are respectively rotatably matched with the two shafts 40. A motor 35 is installed in the base frame 30. The output shaft of the motor 35 drives one of the shafts 40 to rotate through a chain drive. It should be noted that the guide groove 341 is an arc structure with the output shaft of the motor 35 as the axis. Therefore, when the motor 35 rotates to drive the base frame 30 to make a circular motion along the inner wall of the steel pipe 10, when the inner wall of the steel pipe 10 has a protrusion or a groove, the shaft 40 can move along the guide groove 341 to ensure that the roller 41 is in contact with the inner wall of the steel pipe 10 at all times, thereby providing stable support for the base frame 30.

[0035] A slider 33 for installing the detection head 50 is slidably provided in the base frame 30 through an elastic member 331, the elastic member 331 is a spring, and the detection head 50 is slidably connected to the slider 33 through an elastic member 501, so that the detection head 50 can move toward or away from the inner wall of the steel pipe 10, the elastic member 501 is a spring, and a smearing member 51 is provided on one side of the detection head 50, along the rotation direction of the base frame 30, the smearing member 51 is located at the front side of the detection head 50, and a driving member 31 is rotatably provided in the base frame 30, and the output shaft of the motor 35 drives the driving member 31 to rotate by chain transmission, and the driving member 31 is rotated along its circumferential direction. A plurality of guide parts 1 311 and guide parts 2 312 are alternately arranged in sequence, and the end of the slider 33 close to the driving part 2 31 has a push rod 332 that cooperates with the guide part 1 311 and the guide part 2 312; a pressing pump is arranged in the base frame 30, and the pressing pump adopts the existing technology. Its principle is consistent with the principle of the pressing pump installed on the shampoo bottle, which will not be repeated here. The pump head 321 of the pressing pump is fixedly connected to the slider 33, and the pump body 322 of the pressing pump is fixedly connected to the base frame 30. The pump head 321 end of the pressing pump is connected to the applicator 51 through a pipeline, and the pump body 322 end of the pressing pump is connected to the storage tank containing the coupling agent through a pipeline.

[0036] It should be noted that, during the rotation of the base frame 30 , the smear member 51 and the detection head 50 are always located on one side of the weld of the steel pipe 10 .

[0037] Therefore, when the output shaft of the motor 35 rotates, the roller 41 and the driving member 2 31 can rotate, and the base frame 30 can make a circular motion around the rotating shaft 25 in the steel pipe 10. During this process, the driving member 2 31 can drive the slider 33 to reciprocate along the axial direction parallel to the steel pipe 10, so that the pressing pump can transport the coupling agent in the storage tank through the pipeline to the application member 51 and be applied to one side of the weld on the inner wall of the steel pipe 10. Then, the detection head 50 can stop at the part of the inner wall of the steel pipe 10 where the coupling agent is applied to detect the weld.

[0038] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A non-destructive flaw detection device for a steel structure, comprising a support assembly arranged in a steel pipe, characterized in that: The support assembly includes a carrier plate, two base plates slidably connected to the carrier plate, and a driving member 1 rotatably connected to the carrier plate. The upper and lower ends of the carrier plate are respectively provided with support plates for abutting against the inner wall of the steel pipe. The support plate is connected to the two base plates through a telescopic frame. When the driving member 1 rotates, the two base plates can simultaneously approach or move away from the carrier plate, so that the two support plates move away from or approach each other. A rotating shaft is rotatably provided on the carrier plate. When the two support plates respectively stop against the inner wall of the steel pipe, the rotating shaft is coaxial with the steel pipe. A base frame is installed on the rotating shaft through a rocker rod. Two wheel groups are installed at the bottom of the base frame. A slider for installing a detection head is slidably provided in the base frame. A smearing piece is provided on one side of the detection head. A second driving piece is rotatably provided in the base frame. A pressing pump is provided in the base frame. One end of the pressing pump is connected to the smearing piece through a pipeline, and the other end is connected to the storage tank through a pipeline. When the wheel group rotates, the base frame can make a circular motion around the rotating shaft in the steel pipe, and the second driving piece can rotate and drive the slider to reciprocate in a direction parallel to the axis of the steel pipe, so that the pressing pump can transport the coupling agent in the storage tank through the pipeline to the smearing piece and be smeared on one side of the weld. The detection head can stop against the part of the inner wall of the steel pipe where the coupling agent has been applied to detect the weld.

2. A non-destructive flaw detection device for steel structures according to claim 1, characterized in that: The slide block is slidably connected to the base frame via an elastic member 1, the pump head of the pressing pump is fixedly connected to the slide block, and the pump body of the pressing pump is fixedly connected to the base frame.

3. A non-destructive flaw detection device for steel structures according to claim 1, characterized in that: The detection head is slidably connected to the slider via the second elastic member, so that the detection head can move toward or away from the inner wall of the steel pipe.

4. A non-destructive flaw detection device for steel structures according to claim 1, characterized in that: Along the rotation direction of the base frame, the smearing member is located at the front side of the detection head.

5. A non-destructive flaw detection device for steel structures according to claim 1, characterized in that: The driving member 2 is provided with a plurality of guide parts 1 and guide parts 2 which cooperate with the sliding block in alternating order along its circumferential direction.

6. A non-destructive flaw detection device for steel structures according to claim 1, characterized in that: The wheel set includes an axle rod slidably connected to a base frame and rollers respectively arranged at two ends of the axle rod. The base frame has mounting plates at two ends along the axis of the steel pipe, and guide grooves for the sliding of the axle rod are respectively opened on the two mounting plates.

7. A non-destructive flaw detection device for steel structures according to claim 6, characterized in that: The shafts in the two wheel sets are connected via three elastic members.

8. A non-destructive flaw detection device for steel structures according to claim 6, characterized in that: A motor is installed in the base frame, and the output shaft of the motor is connected to the second driving member and one of the shaft rods respectively through chain transmission. The guide groove is an arc-shaped structure with the output shaft of the motor as the axis.

9. A non-destructive flaw detection device for steel structures according to claim 1, characterized in that: The telescopic frame is a scissor-type structure, the telescopic frame is rotatably connected to the two base plates, the support plate is rotatably connected to the end of the telescopic frame, the support plate is provided with an elastic anti-skid pad that cooperates with the inner wall of the steel pipe, one of the base plates is fixedly provided with a guide rod for sliding the carrier plate and the other base plate, the driving member 1 is a bidirectional screw rod, the two base plates are respectively matched with two parts of the bidirectional screw rod with different threads in rotation direction, the driving member 1 is provided with a ring plate that cooperates with the carrier plate for rotation, a plurality of limit grooves are provided along the circumference of the ring plate, and a limit rod that cooperates with the limit groove is slidably provided on the carrier plate through the elastic member 4.

10. A non-destructive flaw detection device for steel structures according to claim 1, characterized in that: The swing rod comprises a plurality of connecting sections connected in sequence, one end of the swing rod is connected to the rotating shaft, and the other end of the swing rod is connected to the base frame.

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