Steel structure weld defect detection device and method

Abstract

The invention discloses a steel structure weld defect detection device and method.The steel structure weld defect detection device comprises a U-shaped base, a transmission roller, an L-shaped frame, an ultrasonic probe, a liquid spraying mechanism and a display device, the transmission roller is arranged on the U-shaped base and used for supporting and rotating a steel pipe, and the L-shaped frame fixes the ultrasonic probe so that the ultrasonic probe can make contact with the surface of a steel pipe weld for real-time detection; a liquid spraying mechanism uniformly sprays water-based foam liquid on the surface of the welding seam, an air spraying device blows air into air holes in the welding seam, so that air enters the foam liquid through the air holes to form stable air bubbles, and a cleaning mechanism wipes the residual foam liquid on the surface of the welding seam to ensure that the surface is clean and tidy; according to the method, high-precision detection of the welding seam of the steel pipe is achieved, the automation degree of operation is high, manual intervention is reduced, the detection efficiency and accuracy are improved, and the continuity of detection and follow-up evaluation work can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure weld defect detection, and in particular to a steel structure weld defect detection device and method. Background Art

[0002] Steel structure is a major type of building structure made of steel. The structure is mainly composed of beams, steel columns, steel trusses, pipes and other components made of steel sections, steel plates and steel pipes, and connected by welding, bolts or rivets. Steel structure is particularly suitable for building large-span, super-high and super-heavy buildings due to its high strength, light weight, good overall rigidity and strong resistance to deformation. Generally speaking, the steel material of steel structure on the market contains a large amount of ferromagnetic elements such as iron, nickel and cobalt, and has strong magnetism. Steel structure weld detection equipment is an important tool for ensuring the quality of steel structure welding. It can help detect whether there are defects in the weld, such as cracks, pores, slag inclusions, etc., to ensure the stability and safety of the steel structure. Ultrasonic testing is a widely used non-destructive testing method. The ultrasonic detector consists of a receiver and a probe, and a long wire is connected between them. The probe is manually operated on the steel plate for detection. The probe is responsible for transmitting ultrasonic energy to the material being tested and converting the reflected sound wave signal into an electrical signal. The receiver receives the echo and analyzes it to evaluate whether there are defects inside the weld.

[0003] The existing Chinese patent with publication number CN118169244B includes a V-shaped base for supporting a tubular steel structure after welding, a mounting frame assembly is connected to one side of the V-shaped base, a rolling power assembly is provided on the mounting frame assembly for rolling the inner side of the tubular steel structure, a sliding seat assembly that can be raised and lowered is provided on the mounting frame assembly, two parallel movable cross tubes are connected to the slide seat assembly for transverse sliding, one of the movable cross tubes is connected to a jet assembly and an ultrasonic assembly and is used to extend into the interior of the tubular steel structure, and the other movable cross tube is connected to a water spray assembly and an ultrasonic detection assembly and is always located outside the tubular steel structure.

[0004] When the above device is in use, high-pressure gas is sprayed from the inner side of the tubular steel structure to the weld through the jet assembly. If there is a gap in the annular weld of the tubular steel structure, a certain amount of gas will flow out from the weld gap during this process, and water is sprayed on the weld outside the tubular steel structure through the water spray assembly. At this time, the continuously flowing gas will continuously generate bubbles on the liquid, and then the rotation of the tubular steel structure can be controlled to perform gap detection on the entire annular weld. However, in actual use, due to the high surface tension of ordinary water itself, it is not easy for gas to enter through the surface of the water and produce stable bubbles, which are easy to break and dissipate. Bubbles can only be produced at the jet assembly. It is difficult for personnel to intuitively find the location of the pores, which affects the efficiency of pore detection. Therefore, it is difficult to accurately and stably mark the location of the pores in the weld. Summary of the invention

[0005] The object of the present invention is to provide a steel structure weld defect detection device and method, which has the advantage of marking the position of pores in the weld and solves the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel structure weld defect detection device and method, comprising a U-shaped seat, wherein symmetrical positions on both sides of the U-shaped seat are penetrated and fixedly rotatably connected with transmission rollers for supporting a steel pipe, and a rectangular groove is opened at one end of the U-shaped seat, and the inner wall of the rectangular groove is penetrated and fixedly connected with a support wheel for limiting the inner wall of the steel pipe, an L-shaped frame is fixedly connected to the end of the U-shaped seat close to the rectangular groove, and an ultrasonic probe for detecting the steel pipe weld is fixedly connected to the bottom side of the top of the support wheel, and a display device for displaying the detection data of the ultrasonic probe is fixedly connected to one end of the U-shaped seat close to the L-shaped frame, a cable is fixedly connected to the ultrasonic probe, and the end of the cable away from the ultrasonic probe is electrically connected to the display device, and the transmission roller is provided with an auxiliary mechanism for driving the steel pipe for rotation adjustment and a spray mechanism for spraying aqueous foam liquid on the weld surface.

[0007] Preferably, the auxiliary mechanism includes two transmission rollers having a pulley coaxially fixedly connected to the same end, and a transmission belt that drives the two transmission rollers to rotate synchronously is sleeved on the outer contour of the pulleys on both sides, and one end of one of the transmission rollers away from the pulley is driven to rotate by a power mechanism.

[0008] Preferably, an air jet is penetrated and fixedly connected to the L-shaped frame, a rectangular rod is fixedly connected to the outer contour of the air jet away from the ultrasonic probe, movable grooves are provided at symmetrical positions at both ends of the rectangular rod, inner walls of the movable grooves at both ends are connected with movable blocks for lifting and movement, a liquid storage box for storing aqueous foam liquid is fixedly connected to the movable block near the end of the rectangular rod, and a cylindrical shell is fixedly connected to the end of the rectangular rod, a discharge pipe and a liquid inlet pipe are penetrated and fixedly connected at symmetrical positions on both sides of the cylindrical shell near the bottom, and the end of the liquid inlet pipe away from the cylindrical shell is penetrated to the inner wall of the liquid storage box and fixedly connected, and a support block for supporting the liquid spraying end of the discharge pipe is fixedly connected to the side of the end of the L-shaped frame near the ultrasonic probe.

[0009] Preferably, the cylindrical shell is provided with a pumping mechanism for extracting and discharging aqueous foam liquid inside the liquid storage tank, the pumping mechanism includes a piston rod axially connected to the inner wall of the cylindrical shell, and the bottom end of the piston rod passes through the cylindrical shell and the end of the rectangular rod and is fixedly connected to the movable block, the inner wall of the liquid inlet pipe near one end of the cylindrical shell is fixedly connected to a one-way liquid inlet valve for quantitatively extracting liquid from the liquid storage tank, and the inner wall of the liquid discharge pipe near one end of the cylindrical shell is fixedly connected to a one-way liquid discharge valve for quantitatively discharging liquid from the cylindrical shell.

[0010] Preferably, a circular plate is rotatably connected to the outer contour of the jet pipe near one end of the rectangular rod, and arc grooves are provided on both sides of the circular plate at positions corresponding to the movable blocks to drive the movable blocks at both ends to move toward or away from each other, and sliders are fixedly connected to the two movable blocks, and the two sliders are respectively penetrated to the inner wall of the arc groove at one adjacent end and are movably connected;

[0011] One end of the support wheel close to the circular plate is coaxially fixedly connected with a gear that drives the circular plate to reciprocate, and the outer contour of the circular plate is fixedly connected with a gear ring that meshes with the gear for transmission.

[0012] Preferably, the air jet tube is provided with a blowing mechanism for blowing air on the weld, and the blowing mechanism includes an end of the air jet tube close to the rectangular rod passing through and fixedly connected with a balloon, and opposite surfaces of the movable blocks at both ends are fixedly connected with pressure plates for squeezing the balloon.

[0013] Preferably, the inner wall of the rectangular groove is penetrated near the bottom side and movably connected with a moving rod for horizontal movement, and the end of the moving rod away from the rectangular rod is fixedly connected to a cleaning block for cleaning the weld, and a columnar block is fixedly connected to the support wheel of the inner wall of the rectangular groove. A cam groove is provided on the outer contour of the columnar block for driving the moving rod to move back and forth horizontally, and the inner wall of the cam groove is movably connected with a connecting block, and the bottom end of the connecting block is fixedly connected to the moving rod.

[0014] A method for detecting defects in welds of steel structures comprises the following steps:

[0015] S1. Rotate the steel pipe: Place the steel pipe to be tested between two transmission rollers, and use the motor to drive the transmission rollers to drive the steel pipe to rotate, ensuring that the steel pipe keeps rotating at a constant speed during the testing process;

[0016] S2. Inspection operation: During the rotation of the steel pipe, the weld surface is always in contact with the ultrasonic probe, so that the ultrasonic probe can conduct a comprehensive inspection of the weld surface of the steel pipe. Through the changes in the ultrasonic reflection wave, the defects on the weld surface, such as pores and cracks, are identified, and the inspection data is transmitted to the display device for real-time monitoring and recording;

[0017] S3, spraying operation: As the transmission roller drives the steel pipe to rotate for testing, the liquid discharge pipe can evenly spray the water-based foam liquid on the surface of the steel pipe weld through the liquid spraying mechanism;

[0018] S4. Blowing operation: Blow air through the air jet pipe to allow the gas to enter the water-based foam liquid through the pores of the weld, further promoting the formation of bubbles and enhancing the stability of the foam, ensuring that the bubbles remain in the pores for a longer time, making it easier for inspectors to observe and record defects;

[0019] S5. Cleaning operation: Wipe and clean the weld surface by moving the rod and the cleaning block fixed at its end to remove the residual aqueous foam liquid on the weld, ensuring that there is no residue on the weld surface and ensuring the cleanliness of the weld surface.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The transmission roller drives the steel pipe to rotate, so that the weld can be continuously inspected during uniform rotation, and the weld can be fully scanned to ensure that possible defects such as pores and cracks inside the weld are detected. The ultrasonic probe collects data in real time and transmits it to the display device for display, making the detection results more accurate and intuitive.

[0022] Second, by spraying water-based foam liquid and combining it with air blowing, the pores on the weld surface can quickly generate bubbles when the gas flows. This process makes the defect location visually easy to observe and record, and the inspectors can clearly identify the location, size and distribution of the pores, thereby greatly improving the intuitiveness and efficiency of defect detection.

[0023] 3. After the inspection operation is completed, the cleaning mechanism can quickly wipe off the residual aqueous foam liquid on the weld surface to ensure that the surface is clean and pollution-free, ensuring that the inspected weld can directly enter the subsequent evaluation and processing stage, reducing the cleaning process and improving the continuity of the work process and production efficiency.

[0024] The above structure solves the problem that in the actual use of the existing device, due to the high surface tension of ordinary water itself, it is not easy for gas to enter through the surface of water and generate stable bubbles, which are easy to break and dissipate. Bubbles can only be generated at the jet assembly, making it difficult for personnel to intuitively find the location of the pores, affecting the efficiency of pore detection, and therefore it is difficult to accurately and stably mark the location of the pores in the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a cross-sectional schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of the rectangular rod of the present invention;

[0028] Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the rectangular rod of the present invention;

[0029] Figure 5 It is a cross-sectional schematic diagram of the three-dimensional structure of the cylindrical housing of the present invention;

[0030] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at A in the middle;

[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of the connection block of the present invention;

[0032] Figure 8 It is a schematic diagram of the process of the steel structure weld defect detection method of the present invention.

[0033] In the figure: 1, U-shaped seat; 101, rectangular groove; 2, transmission roller; 3, support wheel; 4, L-shaped frame; 5, ultrasonic probe; 6, cable; 7, display device; 8, pulley; 9, transmission belt; 10, jet tube; 11, rectangular rod; 111, movable groove; 12, movable block; 13, liquid storage box; 14, cylindrical shell; 15, discharge pipe; 151, one-way discharge valve; 16, support block; 17, liquid inlet pipe; 171, one-way liquid inlet valve; 18, circular plate; 181, arc groove; 19, slider; 20, gear ring; 21, gear; 22, piston rod; 23, balloon; 24, pressure plate; 25, moving rod; 26, cleaning block; 27, cylindrical block; 271, cam groove; 28, connecting block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] See also Figures 1 to 8The present invention provides a technical solution: a steel structure weld defect detection device and method, comprising a U-shaped seat 1, wherein the U-shaped seat 1 is penetrated and fixedly rotatably connected with a driving roller 2 for supporting a steel pipe at symmetrical positions on both sides, and a rectangular groove 101 is opened at one end of the U-shaped seat 1, and the inner wall of the rectangular groove 101 is penetrated and fixedly connected with a supporting wheel 3 for limiting the inner wall of the steel pipe, an L-shaped frame 4 is fixedly connected to the end of the U-shaped seat 1 close to the rectangular groove 101, and an ultrasonic probe 5 for detecting the steel pipe weld is fixedly connected to the bottom side of the top of the supporting wheel 3, and a display device 7 for displaying the detection data of the ultrasonic probe 5 is fixedly connected to one end of the U-shaped seat 1 close to the L-shaped frame 4, a cable 6 is fixedly connected to the ultrasonic probe 5, and the end of the cable 6 away from the ultrasonic probe 5 is electrically connected to the display device 7, and the driving roller 2 is provided with an auxiliary mechanism for driving the steel pipe to rotate and adjust and a spray mechanism for spraying aqueous foam liquid on the weld surface.

[0037] The auxiliary mechanism includes two transmission rollers 2, both of which are coaxially fixed with a pulley 8 at the same end, and the outer contours of the pulleys 8 on both sides are sleeved with transmission belts 9 that drive the two transmission rollers 2 to rotate synchronously, and one end of one of the transmission rollers 2 away from the pulley 8 is driven to rotate by a power mechanism.

[0038] When in use, by setting the U-shaped seat 1, the U-shaped seat 1 is placed on a flat ground to improve the stability of the detection device. Through the transmission roller 2 set on the U-shaped seat 1, the transmission roller 2 is connected to the U-shaped seat 1 by fixed axis rotation. First, the steel pipe to be detected is placed between the two transmission rollers 2, so that the two transmission rollers 2 are in contact with the outer contour of the steel pipe. Through the rectangular groove 101 opened on the U-shaped seat 1 and the support wheel 3 set on the rectangular groove 101, the support wheel 3 can support the inner wall of the steel pipe, thereby ensuring the stability of the steel pipe. At the same time, the support wheel 3 is in the U-shaped A fixed-axis rotation connection is performed on the seat 1, and a pulley 8 is arranged on the transmission roller 2, and a transmission belt 9 is arranged on the pulley 8, and the transmission belt 9 is sleeved on the two pulleys 8 and a transmission connection is performed, and one of the transmission rollers 2 is driven to rotate by a motor, then the transmission belt 9 can drive the two transmission rollers 2 to rotate synchronously under the action of the pulley 8, accompanied by the support wheel 3 supporting the inner wall of the steel pipe, so that the transmission roller 2 can drive the steel pipe to rotate at a uniform speed, and at the same time, the support wheel 3 can synchronously perform fixed-axis rotation on the U-shaped seat 1 under the action of the steel pipe.

[0039] By means of an L-shaped frame 4 arranged on the U-shaped seat 1, the L-shaped frame 4 is fixedly supported on the U-shaped seat 1, and by means of an ultrasonic probe 5 arranged on the L-shaped frame 4, the ultrasonic probe 5 is in contact with the weld surface of the connecting end of the steel pipe, and the transmission roller 2 drives the steel pipe to rotate at a uniform speed, so that the ultrasonic probe 5 can detect the annular weld on the surface of the steel pipe, thereby improving the efficiency of weld detection, and by means of a display device 7 arranged on the L-shaped frame 4 and a cable 6 arranged on the ultrasonic probe 5, the cable 6 electrically connects the ultrasonic probe 5 with the display device 7, so that the ultrasonic probe 5 can transmit the monitoring data to the display device 7 for display, so that personnel can view the detection data on the display device 7.

[0040] By setting up a liquid spraying mechanism, the spraying mechanism can spray water-based foam liquid on the surface of the weld. The surface tension of the above-mentioned water-based foam liquid is low, and bubbles can be quickly formed when the gas passes through the pores of the weld, which makes it easier for the gas to enter the liquid and form stable bubbles, so that the bubbles can be maintained on the surface of the weld for a long time, so that the inspection personnel can observe and record more intuitively. The size, number and distribution of the bubbles can intuitively reflect the location and size of the weld defects.

[0041] Embodiment 2:

[0042] On the basis of the first embodiment, further:

[0043] The L-shaped frame 4 is penetrated and fixedly connected with an air jet tube 10, and a rectangular rod 11 is fixedly connected to the outer contour of the end of the air jet tube 10 away from the ultrasonic probe 5, and movable grooves 111 are opened at symmetrical positions at both ends of the rectangular rod 11, and the inner walls of the movable grooves 111 at both ends are connected with movable blocks 12 for lifting and movement, and the movable blocks 12 near the ends of the rectangular rods 11 are fixedly connected with a liquid storage box 13 for storing aqueous foam liquid, and the ends of the rectangular rods 11 are fixedly connected with a cylindrical shell 14, and the cylindrical shell 14 is penetrated and fixedly connected with a discharge pipe 15 and a liquid inlet pipe 17 at symmetrical positions on both sides near the bottom end, and the end of the liquid inlet pipe 17 away from the cylindrical shell 14 is penetrated to the inner wall of the liquid storage box 13 and fixedly connected, and the end of the L-shaped frame 4 near the ultrasonic probe 5 is fixedly connected with a support block 16 for supporting the liquid spraying end of the discharge pipe 15.

[0044] When in use, the jet pipe 10 is fixedly supported on the L-shaped frame 4 through the jet pipe 10 provided on the L-shaped frame 4, and the air outlet of the jet pipe 10 at one end away from the L-shaped frame 4 corresponds to the position of the weld of the inner wall of the steel pipe, so that the jet pipe 10 can blow air to the weld of the inner wall of the steel pipe later, and the rectangular rod 11 provided on the jet pipe 10 is fixedly supported on the jet pipe 10, and the movable groove 111 is provided on the rectangular rod 11, and the movable block 12 is provided on the movable groove 111, so that the movable groove 111 can limit the moving direction of the movable block 12, and the liquid storage box 13 provided on the movable block 12 , and the liquid storage box 13 is fixedly supported on the movable block 12, firstly, the aqueous foam liquid is stored in the inner wall of the liquid storage box 13, through the liquid storage box 13 set on the rectangular rod 11, and the discharge pipe 15 and the liquid inlet pipe 17 set on the cylindrical shell 14, so that the liquid inlet pipe 17 can connect the cylindrical shell 14 and the inner wall of the liquid storage box 13, and at the same time, the discharge pipe 15 is connected with the inner wall of the cylindrical shell 14, so as to facilitate the subsequent extraction and discharge of the aqueous foam liquid inside the liquid storage box 13, and through the support block 16 set on the L-shaped frame 4, the support block 16 can fix and support the liquid outlet end of the discharge pipe 15 at the corresponding position of the weld.

[0045] Embodiment three:

[0046] On the basis of the second embodiment, further:

[0047] The cylindrical shell 14 is provided with a pumping mechanism for extracting and discharging the aqueous foam liquid in the liquid storage box 13. The pumping mechanism includes a piston rod 22 axially connected to the inner wall of the cylindrical shell 14, and the bottom end of the piston rod 22 passes through the cylindrical shell 14 and the end of the rectangular rod 11 and is fixedly connected to the movable block 12. The inner wall of the liquid inlet pipe 17 near one end of the cylindrical shell 14 is fixedly connected to a one-way liquid inlet valve 171 for quantitatively extracting the liquid in the liquid storage box 13. The inner wall of the liquid discharge pipe 15 near one end of the cylindrical shell 14 is fixedly connected to a one-way liquid discharge valve 151 for quantitatively discharging the liquid in the cylindrical shell 14.

[0048] A circular plate 18 is rotatably connected to the outer contour of the jet pipe 10 near one end of the rectangular rod 11, and arc grooves 181 are provided on both sides of the circular plate 18 at positions corresponding to the movable blocks 12 to drive the movable blocks 12 at both ends to move toward or away from each other. Slide blocks 19 are fixedly connected to the two movable blocks 12, and the two slide blocks 19 are respectively penetrated to the inner wall of the arc groove 181 at one adjacent end and are movably connected;

[0049] The end of the support wheel 3 close to the circular plate 18 is coaxially fixedly connected with a gear 21 for driving the circular plate 18 to reciprocate, and the outer contour of the circular plate 18 is fixedly connected with a gear ring 20 for meshing transmission with the gear 21 .

[0050] When in use, the piston rod 22 is provided on the cylindrical shell 14, and the piston rod 22 is connected to the inner wall of the cylindrical shell 14 for lifting and movement, and the piston rod 22 is fixedly supported on the movable block 12, and the circular plate 18 is provided on the jet pipe 10, and the circular plate 18 is rotatably connected to the outer contour of the jet pipe 10, and the gear 21 is provided on the support wheel 3, and the gear 21 is coaxially fixedly connected with the support wheel 3, so that the support wheel 3 can drive the gear 21 to synchronously rotate on a fixed axis, and the gear ring 20 provided on the circular plate 18, accompanied by the mutual meshing of the teeth of the gear ring 20 and the gear 21, can make the gear ring 20 drive the circular plate 18 to rotate on a fixed axis under the action of the gear 21.

[0051] When the transmission roller 2 drives the steel pipe to rotate in the opposite direction to B for detection, the gear 21 drives the circular plate 18 to rotate in the direction of B. Through the arc groove 181 opened on the circular plate 18 and the slider 19 arranged on the movable block 12, the slider 19 can pull the movable blocks 12 at both ends to move in opposite directions under the action of the arc groove 181, and the piston rod 22 moves toward the bottom end near the cylindrical shell 14 under the pulling of the movable block 12. Then, the internal air pressure near the bottom end of the cylindrical shell 14 is positive pressure, and the one-way discharge valve 151 and the one-way inlet valve 171 are arranged on the discharge pipe 15 and the inlet pipe 17. At this time, the one-way discharge valve 151 is in an open state, and the one-way inlet valve 171 is in a closed state, so that the discharge pipe 15 can spray the aqueous foam liquid inside the cylindrical shell 14 on the weld of the steel pipe to facilitate the subsequent detection of pores at the weld.

[0052] When the steel pipe inspection is completed, the transmission roller 2 drives the steel pipe to rotate in the direction of B, and the gear 21 drives the circular plate 18 to reset and rotate in the direction opposite to B. At the same time, the above-mentioned structure synchronously resets and moves in the opposite direction, accompanied by the piston rod 22 resetting and moving toward the position close to the top of the cylindrical shell 14, so that the internal air pressure of the cylindrical shell 14 near the bottom is negative pressure. At this time, the one-way discharge valve 151 is in a closed state, and the one-way inlet valve 171 is in an open state, so that the inlet pipe 17 can quantitatively extract the aqueous foam liquid in the liquid storage box 13 into the interior of the cylindrical shell 14.

[0053] Embodiment 4:

[0054] On the basis of the third embodiment, further:

[0055] The air jet pipe 10 is provided with a blowing mechanism for blowing air on the weld, and the blowing mechanism includes an end of the air jet pipe 10 close to the rectangular rod 11 through which a balloon 23 is passed and fixedly connected, and pressure plates 24 for squeezing the balloon 23 are fixedly connected to the opposite surfaces of the movable blocks 12 at both ends.

[0056] When in use, the balloon 23 is connected to the jet tube 10 through the balloon 23 arranged on the jet tube 10, and the pressure plate 24 arranged on the movable block 12 moves toward each other along with the movable block 12, so that the pressure plate 24 can contact and squeeze the surface of the balloon 23, so that the internal gas of the balloon 23 is discharged through the jet tube 10, so that the balloon 23 can discharge the gas to the welding contact of the steel pipe. When there are pores in the weld, the gas discharged from the balloon 23 enters the external aqueous foam liquid through the pores, so that the aqueous foam liquid generates obvious bubbles on the surface of the weld, and then personnel can observe the position of the pores more intuitively and mark them, further improving the detection efficiency.

[0057] The balloon 23 is made of rubber and can quickly return to its original shape after being stretched or compressed. As the movable block 12 is reset and moved in the opposite direction, the pressure plate 24 slowly breaks away from contact with the balloon 23, so that the balloon 23 can automatically reset and replenish the internal gas.

[0058] Embodiment five:

[0059] On the basis of the fourth embodiment, further:

[0060] The inner wall of the rectangular groove 101 is penetrated near the bottom side and movably connected with a moving rod 25 for horizontal movement. The end of the moving rod 25 away from the rectangular rod 11 is fixedly connected with a cleaning block 26 for cleaning the weld. The support wheel 3 on the inner wall of the rectangular groove 101 is also fixedly connected with a columnar block 27. The outer contour of the columnar block 27 is provided with a cam groove 271 for driving the moving rod 25 to move horizontally back and forth, and the inner wall of the cam groove 271 is movably connected with a connecting block 28, and the bottom end of the connecting block 28 is fixedly connected to the moving rod 25.

[0061] When in use, through the moving rod 25 set on the rectangular groove 101, the moving rod 25 is horizontally moved and connected on the U-shaped seat 1, and through the cleaning block 26 set on the moving rod 25, the cleaning block 26 contacts the weld on the surface of the steel pipe, and through the columnar block 27 set on the support wheel 3, the columnar block 27 can be rotated synchronously with the support wheel 3, and through the cam groove 271 opened on the columnar block 27, and the connecting block 28 set on the cam groove 271, it rotates along with the columnar block 27, so that the connecting block 28 can drive the moving rod 25 to move horizontally under the action of the cam groove 271, so that the cleaning block 26 can wipe and clean the water-based foam liquid after detection at the weld under the action of the moving rod 25, thereby ensuring the cleanliness of the weld on the surface of the steel pipe.

[0062] A method for detecting defects in welds of steel structures comprises the following steps:

[0063] S1. Rotate the steel pipe: place the steel pipe to be tested between two transmission rollers 2, and drive the transmission rollers 2 to rotate the steel pipe through a motor to ensure that the steel pipe keeps rotating at a constant speed during the testing process;

[0064] S2. Detection operation: During the rotation of the steel pipe, the weld surface is always in contact with the ultrasonic probe 5, so that the ultrasonic probe 5 performs a comprehensive detection on the weld surface of the steel pipe, identifies defects on the weld surface such as pores and cracks through changes in ultrasonic reflection waves, and transmits the detection data to the display device 7 for real-time monitoring and recording;

[0065] S3, spraying operation: with the transmission roller 2 driving the steel pipe to rotate for detection, the liquid discharge pipe 15 can spray the water-based foam liquid evenly on the surface of the steel pipe weld through the liquid spraying mechanism;

[0066] S4, blowing operation: blowing air through the air jet pipe 10, so that the gas enters the aqueous foam liquid through the pores of the weld, further promoting the formation of bubbles and enhancing the stability of the foam, ensuring that the bubbles remain in the pores for a longer time, making it convenient for the inspectors to observe and record defects;

[0067] S5. Cleaning operation: Wipe and clean the weld surface by moving the rod 25 and the cleaning block 26 fixed at its end to remove the residual aqueous foam liquid on the weld, ensuring that there is no residue on the weld surface and the cleanliness of the weld surface is guaranteed.

[0068] It is further achieved that the existing device can accurately and stably mark the position of the pores in the weld during actual use, is easy to use, and is better than traditional products.

[0069] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel structure weld defect detection device, characterized in that: The invention comprises a U-shaped seat (1), wherein transmission rollers (2) for supporting a steel pipe are penetrated and fixedly connected at symmetrical positions on both sides of the U-shaped seat (1), and one end of the U-shaped seat (1) is provided with a rectangular groove (101), and the inner wall of the rectangular groove (101) is penetrated and fixedly connected with a support wheel (3) for limiting the inner wall of the steel pipe, and an L-shaped frame (4) is fixedly connected to one end of the U-shaped seat (1) close to the rectangular groove (101), and a support wheel (3) for limiting the inner wall of the steel pipe is fixedly connected at the bottom side of the top end of the support wheel (3). An ultrasonic probe (5) for detecting the weld is provided, and a display device (7) for displaying detection data of the ultrasonic probe (5) is fixedly connected to one end of the U-shaped seat (1) close to the L-shaped frame (4), a cable (6) is fixedly connected to the ultrasonic probe (5), and an end of the cable (6) away from the ultrasonic probe (5) is electrically connected to the display device (7), and an auxiliary mechanism for driving the steel pipe to rotate and adjust and a liquid spraying mechanism for spraying water-based foam liquid on the surface of the weld are provided on the driving roller (2).

2. A steel structure weld defect detection device according to claim 1, characterized in that: The auxiliary mechanism comprises two transmission rollers (2) having a pulley (8) coaxially fixedly connected to the same end thereof, and a transmission belt (9) for driving the two transmission rollers (2) to rotate synchronously is sleeved on the outer contour of the pulleys (8) on both sides, wherein one end of the transmission roller (2) away from the pulley (8) is driven to rotate by a power mechanism.

3. A steel structure weld defect detection device according to claim 2, characterized in that: An air jet tube (10) is passed through and fixedly connected to the L-shaped frame (4); a rectangular rod (11) is fixedly connected to the outer contour of the end of the air jet tube (10) away from the ultrasonic probe (5); movable grooves (111) are provided at symmetrical positions at both ends of the rectangular rod (11); movable blocks (12) are connected to the inner walls of the movable grooves (111) at both ends so as to be movable and lifting; a liquid storage box (13) for storing aqueous foam liquid is fixedly connected to the movable block (12) near the end of the rectangular rod (11). , and the end of the rectangular rod (11) is fixedly connected to a cylindrical shell (14), and the cylindrical shell (14) is penetrated and fixedly connected to a liquid discharge pipe (15) and a liquid inlet pipe (17) at symmetrical positions on both sides near the bottom end, and the end of the liquid inlet pipe (17) away from the cylindrical shell (14) is penetrated to the inner wall of the liquid storage box (13) and fixedly connected, and the end of the L-shaped frame (4) close to the ultrasonic probe (5) is fixedly connected to a support block (16) for supporting the liquid spraying end of the liquid discharge pipe (15).

4. A steel structure weld defect detection device according to claim 3, characterized in that: The cylindrical shell (14) is provided with a pumping mechanism for extracting and discharging aqueous foam liquid in the liquid storage box (13), the pumping mechanism comprising a piston rod (22) axially movably connected to the inner wall of the cylindrical shell (14), wherein the bottom end of the piston rod (22) penetrates the cylindrical shell (14) and the end of the rectangular rod (11) and is fixedly connected to the movable block (12); the inner wall of the liquid inlet pipe (17) close to one end of the cylindrical shell (14) is fixedly connected to a one-way liquid inlet valve (171) for quantitatively extracting liquid from the liquid storage box (13); and the inner wall of the liquid discharge pipe (15) close to one end of the cylindrical shell (14) is fixedly connected to a one-way liquid discharge valve (151) for quantitatively discharging liquid from the cylindrical shell (14).

5. A steel structure weld defect detection device according to claim 4, characterized in that: A circular plate (18) is rotatably connected to the outer contour of one end of the jet pipe (10) near the rectangular rod (11); arc grooves (181) are provided on both sides of the circular plate (18) at positions corresponding to the movable blocks (12) for driving the movable blocks (12) at both ends to move toward or away from each other; a slider (19) is fixedly connected to the two movable blocks (12); the two sliders (19) respectively penetrate the inner wall of the arc groove (181) at one adjacent end and are movably connected; One end of the support wheel (3) close to the circular plate (18) is coaxially fixedly connected to a gear (21) for driving the circular plate (18) to reciprocate, and a gear ring (20) is fixedly connected to the outer contour of the circular plate (18) for meshing transmission with the gear (21).

6. A steel structure weld defect detection device according to claim 5, characterized in that: The air jet pipe (10) is provided with a blower mechanism for blowing air at the weld, the blower mechanism comprising a balloon (23) passing through and fixedly connected to one end of the air jet pipe (10) close to the rectangular rod (11), and pressure plates (24) for pressing the balloon (23) are fixedly connected to the opposite surfaces of the movable blocks (12) at both ends.

7. A steel structure weld defect detection device according to claim 6, characterized in that: A moving rod (25) for horizontal movement is penetrated and movably connected to the inner wall of the rectangular groove (101) near the bottom side, and a cleaning block (26) for cleaning the weld is fixedly connected to one end of the moving rod (25) away from the rectangular rod (11). A columnar block (27) is fixedly connected to the support wheel (3) on the inner wall of the rectangular groove (101). A cam groove (271) for driving the moving rod (25) to move horizontally back and forth is formed on the outer contour of the columnar block (27), and a connecting block (28) is movably connected to the inner wall of the cam groove (271), and the bottom end of the connecting block (28) is fixedly connected to the moving rod (25).

8. A steel structure weld defect detection method, applied to a steel structure weld defect detection device according to any one of claims 1 to 7, comprising the following steps: S1. Rotating the steel pipe: placing the steel pipe to be tested between two transmission rollers (2), and driving the transmission rollers (2) by a motor to drive the steel pipe to rotate, so as to ensure that the steel pipe keeps rotating at a constant speed during the testing process; S2. Detection operation: During the rotation of the steel pipe, the weld surface is always in contact with the ultrasonic probe (5), so that the ultrasonic probe (5) performs a comprehensive detection on the weld surface of the steel pipe, identifies defects on the weld surface such as pores and cracks through changes in ultrasonic reflection waves, and transmits the detection data to the display device (7) for real-time monitoring and recording; S3, spraying operation: the transmission roller (2) drives the steel pipe to rotate for testing, and the liquid discharge pipe (15) is used to evenly spray the water-based foam liquid on the surface of the steel pipe weld through the liquid spraying mechanism; S4, air blowing operation: blowing air through the air jet pipe (10) so that the gas enters the aqueous foam liquid through the pores of the weld, further promoting the formation of bubbles and enhancing the stability of the foam, ensuring that the bubbles remain in the pores for a longer time, making it easier for inspectors to observe and record defects; S5, cleaning operation: the weld surface is wiped and cleaned by moving the rod (25) and the cleaning block (26) fixed at the end thereof to wipe off the residual aqueous foam liquid on the weld, ensuring that there is no residue on the weld surface and the cleanliness of the weld surface is guaranteed.

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