Steel structure welding residual stress detection device and method

Abstract

The invention discloses a steel structure welding residual stress detection device and method, the device comprises a detector controller and an ultrasonic probe, the detector controller is connected with a data line, one end of the data line is connected with the ultrasonic probe, and the detector controller is provided with a lifting handle frame and a sliding frame. The detection device is convenient to carry, when the data line and the foot of a worker are stumbled, pulling force borne by the end, close to the detector controller, of the data line can be transmitted to the two U-shaped winding frames and the sliding frame, the sliding frame is pulled and driven to compress springs on the two longitudinal positioning shafts to slide backwards, and then the data line is detected. And the dragging stress transmitted and acted on the tail end part of the data line is buffered, so that the tearing damage to the data line is reduced, and the tail end plug of the data line is also prevented from falling off due to pulling and pulling.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection devices, and in particular relates to a device and method for detecting residual stress in welding of steel structures. Background Art

[0002] There are many methods for detecting welding residual stress, mainly including: stress release method, non-destructive detection method and numerical simulation method. Among them, non-destructive detection method includes strain measurement method, ultrasonic method, magnetic powder method, eddy current method, etc. Its detection principle is to infer the existence of welding residual stress by measuring the strain or signal change on the surface or inside of the welding structure. Among the non-destructive detection methods, ultrasonic method is the most widely used, so the market for devices relying on ultrasonic detection is also the broadest.

[0003] The portable ultrasonic welding stress detection device is connected to the ultrasonic probe through a data cable. When in use, the ultrasonic probe needs to be moved to the weld of the steel structure, which will pull the data cable out and lay it on the ground. When the staff walks on site, they may be tripped by the data cable and tear it.

[0004] Most existing portable ultrasonic welding residual stress detection devices lack a mechanism that can buffer or suppress the tearing and pulling force on the data cable. As a result, when the data cable is stretched or nearly stretched, there is a high probability that the plug at the end of the data cable will be pulled out and fall off, causing the detection process to be interrupted and affecting the detection efficiency.

[0005] Patent document with announcement number CN117824896A discloses an ultrasonic detection device and method for residual stress of steel structure welds. The device detects by placing the steel structure on a workbench. The device is not convenient to move to any construction site, and the size of the detected steel structure is limited by the size of the workbench.

[0006] The patent document with announcement number CN209858117U discloses a steel structure welding residual stress detection device. The device is a box-type structure as a whole, but the wiring harness connecting the ultrasonic transducer probe is not equipped with a corresponding buffer structure. If a person trips over the wiring harness, the ultrasonic transducer probe will be directly pulled, thereby affecting the detection. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a device and method for detecting residual stress in steel structure welding.

[0008] The present invention is achieved through the following technical solutions.

[0009] The invention provides a steel structure welding residual stress detection device, comprising a detector controller and an ultrasonic probe, wherein the detector controller is connected to a data line, one end of the data line is connected to the ultrasonic probe, and a lifting handle frame and a sliding frame are arranged on the detector controller.

[0010] Preferably, a push frame is provided at one end of the sliding frame, the push frame is slidably connected to the detector controller via a connecting ring, and a winding frame is provided at the other end of the sliding frame.

[0011] Preferably, a wire threading groove is formed through the winding frame, and a pressing plate is slidably connected in the wire threading groove.

[0012] Preferably, one end of the pressing plate is connected to a threaded tightening shaft A, and the threaded tightening shaft A is threadedly connected to the winding frame through a threaded hole.

[0013] Preferably, a threaded tightening shaft B is provided on the lifting handle frame, and the lifting handle frame is connected to a slider via the threaded tightening shaft B, and the threaded tightening shaft B penetrates and screws with the slider.

[0014] Preferably, the detector controller is provided with a positioning shaft, on which a sliding frame is slidably installed by pushing an elastic member, and the positioning shaft penetrates the elastic member.

[0015] Preferably, a slide groove is provided on the side wall of the detector controller.

[0016] Preferably, a groove is provided on the side wall of the detector controller.

[0017] A method for using a steel structure welding residual stress detection device comprises the following steps:

[0018] When in use, the data lines are released from the two winding frames, and the ultrasonic probe is transferred to the weld position to be tested on the steel structure. By setting the frequency of the ultrasonic probe on the detector controller, the ultrasonic probe generates ultrasonic waves at the set frequency. The detector controller measures the received change signal through the ultrasonic probe, and can generate an undulating wave diagram of the signal in a two-dimensional quadrant, thereby inferring the stress distribution in the weld.

[0019] The beneficial effects of the present invention are:

[0020] The detection device of the present invention is easy to carry, and when the data cable is entangled with the feet of the staff, the pulling force on the end of the data cable close to the detector controller will be transmitted to the two U-shaped winding frames and the sliding frame, and the sliding frame will be pulled to compress the springs on the two longitudinal positioning shafts to slide backward, thereby buffering the pulling stress transmitted to the tail end of the data cable and reducing the tearing damage to the data cable.

[0021] In addition, the tail of the data cable is located between the rear side wall of the detector controller and the wire threading groove, which is bent and loosely set. This bent line segment can be pulled and expanded in the process of buffering the pulling force when the sliding frame slides back and forth, providing a movable margin for the forward and backward sliding movement of the sliding frame, avoiding the tail end of the data cable from being in a tensioned state, limiting the forward and backward sliding movement of the sliding frame, and the length of the bent part of the tail end of the data cable is much larger than the forward and backward sliding stroke of the sliding frame. When the sliding frame is pulled backward to the maximum stroke, the bent part of the tail end of the data cable remains loose and not stretched, which can intercept the pulling force generated by the tripping on the sliding frame, avoiding the pulling force generated by the tripping from being transmitted to the tail end plug of the data cable to pull the plug out, which helps to ensure the continuous use of the detection device and indirectly improve the use efficiency of the detection device.

[0022] The lifting handle frame has three usage forms. First, it can be used as a handle for lifting the detector controller in the normal state. Second, when it is flipped downward and abutted against the bottom wall of the detector controller and placed in a tilted state, it can be used to tilt the detector controller. Third, when the lifting handle frame is rotated to a horizontal state and blocks the screen on the front side of the detector controller, it can be used as an anti-collision protection structure for the screen. The lifting handle frame has a multi-purpose use effect, which can save the need to separately configure a handle and a screen anti-collision protection structure for the detector controller, helping to simplify the structure of the device and reduce the consumables and cost of the device. In addition, the lifting handle frame is set up for sliding installation through two cross sliders, which helps to ensure the normal implementation of the multi-purpose function of the lifting handle frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the front side of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the rear side of the present invention;

[0025] Figure 3 It is a schematic structural diagram of the bottom side of the present invention;

[0026] Figure 4 This is a diagram of the lifting handle frame of the present invention being swung downward and tilted to support the state;

[0027] Figure 5 This is a diagram of the lifting handle frame of the present invention in a disassembled state;

[0028] Figure 6 It is a structural schematic diagram of the winding frame of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the sliding frame of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of region A of the present invention;

[0031] In the figure: 1-detector controller, 101-positioning shaft, 102-fixed frame, 103-slide groove, 104-elastic member, 105-groove, 2-lifting handle frame, 201-threaded tightening shaft B, 202-slider, 3-sliding frame, 301-push frame, 302-winding frame, 303-threading groove, 304-pressing plate, 305-threaded tightening shaft A, 306-threaded hole, 307-connecting ring, 4-ultrasonic probe, 401-data cable. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0033] Example:

[0034] like Figures 1 to 8 As shown, a steel structure welding residual stress detection device includes a detector controller 1 and an ultrasonic probe 4. A pluggable connecting data cable 401 is provided on the rear side wall of the detector controller 1, and one end of the data cable 401 is connected to the ultrasonic probe 4. A lifting handle frame 2 and a sliding frame 3 are provided on the detector controller 1. A screen is embedded and installed on the front side wall of the detector controller 1, and the lifting handle frame 2 can rotate relative to the detector controller 1.

[0035] A push frame 301 is welded at one end of the sliding frame 3. The push frame 301 is in a U-shaped structure and is arranged vertically. The push frame 301 is slidably connected to the positioning shaft 101 of the detector controller 1 through a connecting ring 307. The positioning shaft 101 passes through the connecting ring 307, and the top cross-bracing part of the push frame 301 is directly opposite to the fixed frame 102 front and back. The push frame 301 is used to drive the sliding frame 3 and two U-shaped winding frames 302 to slide back and forth. Two U-shaped winding frames 302 that are arranged vertically and open upward are symmetrically welded on the other end rod of the sliding frame 3. The two U-shaped winding frames 302 are used to wind and store idle data cables 401.

[0036] A wire threading groove 303 is formed on the bottom side of the U-shaped winding frame 302, and the data line 401 first passes through the two wire threading grooves 303 in sequence and then winds around the two U-shaped winding frames 302. The two wire threading grooves 303 are slidably connected with a pressure plate 304, and the pressure plate 304 presses the data line 401 and the U-shaped winding frame 302 together to transfer the pulling force on the data line 401 to the sliding frame 3 for buffering.

[0037] One end of the pressing plate 304 is connected to the threaded tightening shaft A305, and the threaded tightening shaft A305 is threadedly connected to the U-shaped winding frame 302 through the threaded hole 306. The first end of the threaded tightening shaft A305 is provided with a cross tightening groove.

[0038] The section of the tail of the data cable 401 located between the rear side wall of the detector controller 1 and the wire slot 303 is circuitously bent and slackly arranged. This circuitously bent section can be stretched and retracted during the process of buffering the pulling force by the forward and backward sliding of the sliding frame 3, providing a margin for the forward and backward sliding movement of the sliding frame 3, avoiding the tail end part of the data cable 401 being in a taut state, restricting the forward and backward sliding movement of the sliding frame 3, and the length of the circuitously bent part at the tail end of the data cable 401 is much greater than the forward and backward sliding stroke of the sliding frame 3. When the sliding frame 3 is pulled and slides backward to the maximum stroke, the circuitously bent part at the tail end of the data cable 401 still remains slack and is not tightened. This can intercept the pulling force generated by the entanglement on the sliding frame 3, avoid the pulling force generated during entanglement being transmitted to the plug at the tail end of the data cable 401 and pulling out the plug, which helps to ensure the continuous use of the detection device and indirectly improve the use efficiency of the detection device.

[0039] At the tail ends of the left and right side rods of the lifting handle frame 2, two threaded tightening shafts B201 are symmetrically and rotatably arranged. The lifting handle frame 2 is connected with a cross-shaped slider 202 through the two threaded tightening shafts B201. The inner walls of the rotating shafts at the tail ends of the left and right side rods of the lifting handle frame 2 are smooth and are freely slidably connected with the threaded tightening shafts B201. The threaded tightening shafts B201 are in threaded screwing fit with the cross-shaped slider 202.

[0040] At positions near the bottom side on the left and right side walls of the detector controller 1, two positioning shafts 101 are symmetrically arranged. A sliding frame 3 with a U-shaped structure is slidably mounted on the positioning shafts 101 by being pushed by elastic members 105. The positioning shafts 101 penetrate through the elastic members 105. The two ends of the positioning shafts 101 are bent to form a U-shaped structure as a whole, and the two ends of the positioning shafts 101 are connected to the detector controller 1.

[0041] On the left and right side walls of the detector controller 1, two cross-shaped chutes 103 are symmetrically opened. The cross-shaped slider 202 is slidably matched with the two cross-shaped chutes 103 correspondingly, and the tail end of the threaded tightening shaft B201 passes through the two cross-shaped sliders 202 and abuts against the side surfaces parallel to the left and right side walls of the detector controller 1 in the two cross-shaped chutes 103.

[0042] On the left and right side walls of the detector controller 1, grooves 106 are symmetrically opened. A plurality of grooves 106 on each side of the detector controller 1 are arranged in parallel, which can be used to reduce the overall mass of the detector controller 1 and also increase the contact area between the detector controller 1 and the air, enhancing the heat dissipation effect of the detector controller 1.

[0043] A method for using a steel structure welding residual stress detection device includes the following steps:

[0044] When in use, the data line 401 is released from the two U-shaped winding frames 302, and the ultrasonic probe 4 is transferred to the position of the weld to be tested on the steel structure. By setting the frequency of the ultrasonic probe 4 on the detector controller 1, the ultrasonic probe 4 generates ultrasonic waves at the set frequency. When the ultrasonic wave propagates in the weld, it is affected by the stress, and the propagation speed and amplitude of the sound wave will change. This change signal is transmitted to the detector controller 1. The detector controller 1 measures the received change signal through the ultrasonic probe 4, and can generate an undulating wave diagram of the signal in a two-dimensional quadrant, and thereby infer the stress distribution in the weld.

[0045] The lifting handle frame 2 has three usage modes. First, in the normal state, the lifting handle frame 2 can be used as a handle for lifting the detector controller 1. Second, Figure 4 When the lifting handle frame 2 is flipped downward and abutted against the bottom wall of the detector controller 1 and placed in a tilted state, it can be used to support the detector controller 1 in an inclined state. Thirdly, when the lifting handle frame 2 is rotated and placed in a horizontal state and blocks the screen on the front side of the detector controller 1, it can be used as an anti-collision protection structure for the screen. Therefore, the lifting handle frame 2 has a multi-purpose use effect, and it is unnecessary to separately configure a handle and a screen anti-collision protection structure for the detector controller 1, which helps to simplify the structure of the device and reduce the consumables and cost of the device.

[0046] When the lifting handle frame 2 is used as a handle, there must be space between it and the detector controller 1 for inserting fingers. At this time, the two cross-shaped sliders 202 need to be slid forward. When the lifting handle frame 2 is flipped and tilted for support, it is necessary to ensure that the front end of the detector controller 1 has sufficient flipping movement space. At this time, the two cross-shaped sliders 202 also need to be slid forward. When the lifting handle frame 2 is used as an anti-collision protection structure for the screen, it is necessary to eliminate the gap between it and the detector controller 1 and contact the screen. At this time, the two cross-shaped sliders 202 need to be slid backward, and then the lifting handle frame 2 is slidably installed through the two cross-shaped sliders 202, which helps to ensure the normal implementation of the multi-purpose function of the lifting handle frame 2.

[0047] The sliding frame 3 is installed by being pushed by the elastic members 104 on the two longitudinal positioning shafts 101, and the tail end of the data cable 401 is fixed together with the two U-shaped winding frames 302 and the sliding frame 3. When the data cable 401 is entangled with the feet of the staff, the pulling force on the end of the data cable close to the detector controller 1 will be transmitted to the two U-shaped winding frames 302 and the sliding frame 3, and the sliding frame 3 will be pulled to compress the springs on the two longitudinal positioning shafts 101 to slide backward. In the process of compressing the two elastic members 104, the pulling stress transmitted to the tail end of the data cable 401 is buffered, and the corresponding tearing damage to the data cable 401 is also reduced.

[0048] When in an idle state, the two positioning plug shafts 104 can plug and seal the top openings of the two U-shaped winding frames 302 to prevent the data cables 401 in the wound storage state from escaping from the two U-shaped winding frames 302, causing scattering and entanglement. The push frame 301 is used to drive the sliding frame 3 and the two U-shaped winding frames 302 to slide back and forth and be separated from the two positioning plug shafts 104, and the top openings of the two U-shaped winding frames 302 are opened and closed. When the top openings of the two U-shaped winding frames 302 are opened, the data cables 401 wound on the two U-shaped winding frames 302 can be retracted and released.

Claims

1. A steel structure welding residual stress detection device, characterized in that: The detector controller (1) comprises a detector controller (1) and an ultrasonic probe (4), wherein the detector controller (1) is connected to a data line (401), one end of the data line (401) is connected to the ultrasonic probe (4), and a lifting handle frame (2) and a sliding frame (3) are arranged on the detector controller (1).

2. A steel structure welding residual stress detection device as claimed in claim 1, characterized in that: A push frame (301) is arranged at one end of the sliding frame (3), and the push frame (301) is slidingly connected to the detector controller (1) via a connecting ring (307). A winding frame (302) is arranged at the other end of the sliding frame (3).

3. A steel structure welding residual stress detection device as claimed in claim 2, characterized in that: A wire threading groove (303) is formed through the winding frame (302), and a pressing plate (304) is slidably connected in the wire threading groove (303).

4. A steel structure welding residual stress detection device as claimed in claim 3, characterized in that: One end of the pressing plate (304) is connected to a threaded tightening shaft A (305), and the threaded tightening shaft A (305) is threadedly connected to the winding frame (302) through a threaded hole (306).

5. A steel structure welding residual stress detection device as claimed in claim 1, characterized in that: A threaded tightening shaft B (201) is provided on the lifting handle frame (2), and the lifting handle frame (2) is connected to a sliding block (202) via the threaded tightening shaft B (201), and the threaded tightening shaft B (201) and the sliding block (202) are screwed through and matched.

6. A steel structure welding residual stress detection device as claimed in claim 1, characterized in that: The detector controller (1) is provided with a positioning shaft (101), and a sliding frame (3) is slidably installed on the positioning shaft (101) through an elastic member (104), and the positioning shaft (101) is arranged to penetrate the elastic member (104).

7. A steel structure welding residual stress detection device as claimed in claim 1, characterized in that: A sliding groove (103) is provided on the side wall of the detector controller (1).

8. A steel structure welding residual stress detection device as claimed in claim 1, characterized in that: A groove (105) is provided on the side wall of the detector controller (1).

9. A method for using a steel structure welding residual stress detection device as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: When in use, the data line (401) is released from the two winding frames (302), and the ultrasonic probe (4) is transferred to the weld position to be tested on the steel structure. By setting the frequency of the ultrasonic probe (4) on the detector controller (1), the ultrasonic probe (4) generates ultrasonic waves at the set frequency. The detector controller (1) measures the received change signal through the ultrasonic probe (4), and can generate an undulating wave diagram of the signal in a two-dimensional quadrant, thereby inferring the stress distribution in the weld.

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