Ultrasonic manual combined detection device and method for transverse defect of weld joint of spiral pipe

Abstract

The invention provides a spiral pipe weld transverse defect ultrasonic manual combination detection device and method.The detection device comprises a framework, probe suspension rotation mechanisms and a walking mechanism, the probe suspension rotation mechanisms are symmetrically arranged on the two sides of the framework, and the front ends of the probe suspension rotation mechanisms are connected with ultrasonic probes through probe clamping bases; the probe suspension rotation mechanism can perform rotation adjustment on the ultrasonic probe in the X direction, the Y direction and the Z direction, the walking mechanism is connected with the framework, the walking mechanism comprises rolling wheels, the walking mechanism is connected with an X-direction rotation device and a Y-direction rotation device, and the X-direction rotation device and the Y-direction rotation device are used for enabling the rolling wheels to be tightly attached to the surface of a steel pipe. The angles of the ultrasonic probes are adjusted through the probe suspension rotating mechanisms symmetrically arranged on the two sides of the framework, so that the angle between the ultrasonic probes and the weld joint and the horizontal distance between the ultrasonic probes and the front edge are fixed, the two ultrasonic probes transmit and receive respectively, and the axes of acoustic beams intersect at a to-be-detected part, so that the cross section of the weld joint is fully covered by the acoustic beams; therefore, the transverse defect of the welding seam is accurately detected.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum steel pipe production, and in particular relates to an ultrasonic manual combined detection device and method for transverse defects of spiral pipe welds. Background Art

[0002] At present, domestic and foreign super-large diameter spiral welded pipes all adopt a one-step submerged arc welding process. Since the super-large steel pipe forming process has the process characteristics of super-large forming angle and super-large diameter-thickness ratio (D / t>140), the pipe diameter changes greatly during the tube billet coiling process, resulting in unstable quality during the forming and welding process. The stress in the welding molten pool and the stress outside the tube billet forming seam are concentrated in the inner weld to form thermal cracks. The crack characteristics are diverse, and transverse cracks are prone to occur in the butt weld.

[0003] In the non-destructive testing standards for steel pipe production, cracks are hazardous defects that are absolutely not allowed to exist, and non-destructive testing personnel must strictly control and accurately characterize the defects. If misjudgment or omission is made, it will leave huge hidden dangers to the safe operation of the pipeline and even cause catastrophic accidents.

[0004] The disadvantages of conventional ultrasonic testing methods are: when ultrasonically testing the transverse defects of spiral pipe welds, an ultrasonic manual self-transmitting and self-receiving or a one-transmitting and one-receiving testing process is used. When scanning horizontally along the weld, it is difficult to ensure the angle and distance between the probe and the defect. The operability is poor, the work efficiency is very low, and it is easy to misjudge and miss. Therefore, it is difficult to achieve positioning detection of transverse defects in welds by conventional manual ultrasonic operation.

[0005] The patent number CN 104777223 A announced by the State Intellectual Property Office on June 19, 2018, and the patent name is "A dual-channel elbow weld ultrasonic detection scanner". The detection scanner includes an integral sliding main support rod, a filter and a junction box, a handle, a digital encoder and a magnetic wheel set, two sets of corresponding TOFD probe systems, and two sets of corresponding creeping wave probe support systems; the wedge block is composed of a wedge block bottom with an inverted right-angled trapezoidal cross section and a wedge block upper part with a right-angled trapezoidal cross section. There is a fixing hole on the front and back surfaces of the wedge block, and a probe circular hole is set on the upper part of the wedge block. The scanner is based on the conventional scanning device, and the up and down movable stroke of the probe frame is increased, and the length of the wedge block is reduced to ensure that the probe can fit closely with the inner and outer curvatures of the elbow workpiece. In addition, 4 adjustable screws are added in the width direction of the wedge block to reduce the swing or flipping of the probe during the scanning process and avoid poor coupling. However, from the perspective of practical application, the scanner has the following problems: 1. Due to the influence of the structural shape on the scanning system, the sawtooth scanning interference is obvious; 2. Due to the limitation of the adjustable screw, the wedge block will not be able to fit tightly with the workpiece surface, resulting in poor coupling and inaccurate measurement. Summary of the invention

[0006] The purpose of the present invention is to provide an ultrasonic manual combined detection device for spiral pipe weld transverse defects, so as to realize ultrasonic manual flaw detection of spiral pipe weld transverse defects and achieve the purpose of effectively detecting weld transverse defects (shortcomings) that are difficult to inspect on the production line.

[0007] Another object of the present invention is to provide a method for detecting transverse defects in spiral pipe welds, wherein the angle between the probe and the weld and the horizontal distance between the front edges are determined, the axes of the sound beams of the two probes intersect at the position to be detected, and the sound beams are ensured to fully cover the cross section of the weld.

[0008] To this end, the technical solution provided by the present invention is as follows: A manual combined ultrasonic detection device for transverse defects of spiral pipe welds comprises a frame, a probe suspension rotating mechanism and a walking mechanism, wherein the probe suspension rotating mechanism is symmetrically arranged on both sides of the frame, the front end of the probe suspension rotating mechanism is connected to an ultrasonic probe through a probe clamping seat, the probe suspension rotating mechanism can perform rotation adjustment on the ultrasonic probe in the X direction, Y direction and Z direction, the walking mechanism is connected to the frame, the walking mechanism comprises rollers, the walking mechanism is connected to an X-direction rotating device and a Y-direction rotating device, and the X-direction rotating device and the Y-direction rotating device are used to make the rollers close to the surface of the steel pipe.

[0009] A spacing adjustment structure is provided between the probe suspension rotating mechanism and the frame.

[0010] The probe suspension rotating mechanism comprises an X-axis rotating shaft, a Y-axis rotating shaft and a Z-axis rotating shaft, wherein the X-axis rotating shaft is connected to the probe clamping seat, an X-axis rotating shaft is provided with an X-axis rotating shaft joint sleeve outside the X-axis rotating shaft, the Z-axis rotating shaft is connected to the X-axis rotating shaft joint sleeve and the two are perpendicular, a Z-axis rotating shaft is provided with a Z-axis rotating shaft joint sleeve outside the Z-axis rotating shaft, the Z-axis rotating shaft joint sleeve is vertically connected to the Y-axis rotating shaft, and a Y-axis rotating shaft joint limiting sleeve, a Y-axis rotating shaft joint sleeve and a probe suspension assembly positioning sleeve are sequentially provided outside the Y-axis rotating shaft; The Y-axis rotary shaft joint limiting sleeve is fixedly connected to the Y-axis rotary shaft, the Z-axis rotary shaft joint sleeve is fixed to the Z-axis rotary shaft via a Z-axis locking screw, and the probe suspension assembly positioning sleeve is fixed to the Y-axis rotary shaft via a positioning sleeve locking screw.

[0011] The walking mechanism includes a front positioning V-shaped roller, a rear positioning V-shaped roller, a roller frame 1 and a roller frame 2. The roller frame 1 and the roller frame 2 are both located in the frame and connected to the frame. The roller frame 1 is connected to the front positioning V-shaped roller, the roller frame 2 is connected to the rear positioning V-shaped roller, the roller frame 1 is connected to the X-axis rotating device, and the roller frame 2 is connected to the Y-axis rotating device.

[0012] The spacing adjustment structure includes a connecting plate, which is connected to the probe suspension rotating mechanism as a whole. A strip hole is opened on the connecting plate, and a through hole is provided on the hook. After the strip hole and the through hole are aligned up and down, the connecting frame and the spacing adjustment structure are fixed by adjusting the locking screw.

[0013] The X-direction rotation device comprises a front wheel flexible rotation tension spring, an X-direction rotation center positioning pin, a front wheel flexible rotation tension spring positioning pin 1 and a front wheel flexible rotation tension spring positioning pin 2; The roller frame 1 is L-shaped, and one end of the roller frame 1 is connected to the front positioning V-shaped roller through the front wheel axle, and the other end of the roller frame 1 is connected to the frame through the front wheel flexible rotary tension spring locating pin 1, and the inflection point of the roller frame 1 is connected to the frame through the X-axis rotation center locating pin, and the front wheel flexible rotary tension spring locating pin 2 is arranged in the frame and located above the front positioning V-shaped roller, one end of the front wheel flexible rotary tension spring is connected to the front wheel flexible rotary tension spring locating pin 1, and the other end of the front wheel flexible rotary tension spring is connected to the front wheel flexible rotary tension spring locating pin 2.

[0014] The Y-axis rotating device includes a rear wheel rotating shaft sleeve and a rear wheel rotating shaft, the rear positioning V-shaped roller is connected to one end of the roller frame 2 through the rear wheel shaft, the other end of the roller frame 2 is connected to the rear wheel rotating shaft, the rear wheel rotating shaft sleeve is sleeved on the rear wheel rotating shaft, and the rear wheel rotating shaft and the rear wheel rotating shaft sleeve are connected by a limit screw.

[0015] The probe clamping seat includes a C-shaped steel and connecting ears, the connecting ears are arranged at the two ends of the top of the C-shaped steel, the probe suspension rotating mechanism is connected to the probe clamping seat through the connecting ears, and the ultrasonic probe is fixed in the probe clamping seat through probe locking screws symmetrically arranged on both sides of the C-shaped steel.

[0016] A method for detecting transverse defects of spiral pipe welds, using a spiral pipe weld transverse defect ultrasonic manual combined detection device, comprises the following steps: Step 1) Use the probe suspension rotating mechanism to adjust the incident sound beams of the two ultrasonic probes to form a 45° horizontal angle with the spiral weld; Step 2) Hold the detection device and move it along the direction of the spiral weld, and ride the front positioning V-shaped roller and the rear positioning V-shaped roller on the weld of the spiral steel pipe; Step 3) One ultrasonic probe sends a signal and the other ultrasonic probe receives the signal. The axes of the sound beams of the two ultrasonic probes intersect at the location to be inspected, and planar defects perpendicular to the inspection surface are detected, thereby realizing the detection of lateral defects.

[0017] During the transverse defect detection process, the front positioning V-shaped roller and the rear positioning V-shaped roller respectively make the roller edges close to the surface of the steel pipe through the X-axis rotating device and the Y-axis rotating device, providing the ability for precise coupling between the probe and the steel pipe.

[0018] The beneficial effects of the present invention are: The ultrasonic manual combined detection device for transverse defects of spiral tube welds provided by the present invention adjusts the angle of the ultrasonic probe by means of the probe suspension rotating mechanisms symmetrically arranged on both sides of the frame, so that the angle and the front horizontal distance between the ultrasonic probe and the weld are fixed. The two ultrasonic probes transmit and receive one, and the axes of the sound beams intersect at the position to be detected, thereby ensuring that the sound beam fully covers the cross section of the weld, thereby accurately detecting transverse defects of the weld.

[0019] The detection device adjusts the distance between the two ultrasonic probes through the distance adjustment structure. The two ultrasonic probes are set to a contact surface consistent with the curvature of the steel pipe, further ensuring the accuracy of the flaw detection results. The probe suspension rotation mechanism can adjust the ultrasonic probe in the X, Y and Z directions, improve the adaptive ability and function of the ultrasonic probe, and ensure the maximum parallelism and coupling between the probe contact surface and the steel pipe surface.

[0020] The present invention rides on the spiral steel pipe weld by means of a front positioning V-shaped roller and a rear positioning V-shaped roller, relies on a flexible rotating tension spring of the front wheel to ensure that the front positioning V-shaped roller is in close contact with the surface of the steel pipe, and uses a Y-direction rotating device to ensure that the two wheel edges of the rear positioning V-shaped roller are always in close contact with the pipe bodies on both sides of the steel pipe weld through rotation adaptively and evenly vertically, so that the probe is securely attached to the pipe wall and the flaw detection walking trajectory conforms to the spiral shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of an implementation method of the present invention; Figure 2 It is a schematic diagram of the front positioning V-type roller; Figure 3 This is the schematic diagram of the ultrasonic probe angle setting; Figure 4 It is a schematic diagram of the components of the present invention; Figure 5 This is a schematic diagram of the connection structure between the front positioning V-shaped roller and the roller frame; Figure 6 1. It is a structural schematic diagram of a roller frame; Figure 7 It is a schematic diagram of the structure of the Y-axis rotating device.

[0022] In the figure: 1. Ultrasonic probe; 2. Probe clamping seat; 2-01. Probe locking screw; 2-1. X-axis rotary shaft joint sleeve; 2-11. X-axis rotary shaft; 2-2. Z-axis rotary shaft joint sleeve; 2-21. Z-axis locking screw; 2-22. Z-axis rotary shaft; 2-3. Y-axis rotary shaft joint limit sleeve; 2-31. Y-axis rotary shaft; 2-4. Y-axis rotary shaft joint sleeve; 2-5. Probe suspension assembly positioning sleeve; 2-51. Positioning sleeve locking screw; 3. Connecting plate; 3-1. Strip hole; 3-11. Adjustment Locking screw; 4-1, front positioning V-type roller; 4-11, front wheel axle; 4-12, roller edge; 4-13, X-axis rotation center positioning pin; 4-14, front wheel flexible rotation tension spring positioning pin one; 4-15, front wheel flexible rotation tension spring positioning pin two; 4-16, front wheel flexible rotation tension spring; 4-17, roller frame one; 4-2, rear positioning V-type roller; 4-21, roller frame two; 4-22, rear wheel rotation shaft; 4-23, limit screw; 4-24, rear wheel rotation shaft sleeve; 4-25, rear wheel axle; 5, frame. Implementation

[0023] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0024] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0025] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings. Example

[0026] The present invention provides an ultrasonic manual combined detection device for transverse defects of spiral pipe welds, comprising a skeleton 5, a probe suspension rotating mechanism and a walking mechanism, wherein the probe suspension rotating mechanism is symmetrically arranged on both sides of the skeleton 5, the front end of the probe suspension rotating mechanism is connected to an ultrasonic probe 1 through a probe clamping seat 2, the probe suspension rotating mechanism can perform rotation adjustment on the ultrasonic probe 1 in the X direction, the Y direction and the Z direction, the walking mechanism is connected to the skeleton 5, the walking mechanism comprises rollers, the walking mechanism is connected to an X-direction rotating device and a Y-direction rotating device, and the X-direction rotating device and the Y-direction rotating device are used to make the rollers close to the surface of the steel pipe.

[0027] The ultrasonic manual combined detection device for transverse defects of spiral tube welds provided by the present invention adjusts the angle of the ultrasonic probe 1 by means of the probe suspension rotating mechanisms symmetrically arranged on both sides of the skeleton 5, so that the angle and the front horizontal distance between the ultrasonic probe 1 and the weld are fixed. The two ultrasonic probes 1 transmit and receive one by one, and the axes of the sound beams intersect at the part to be detected, thereby ensuring that the sound beams fully cover the cross section of the weld, thereby accurately detecting transverse defects of the weld. Example

[0028] On the basis of Example 1, this embodiment provides an ultrasonic manual combined detection device for transverse defects of spiral pipe welds, and a spacing adjustment structure is provided between the probe suspension rotating mechanism and the skeleton 5.

[0029] The distance between the two ultrasonic probes 1 is preset and adjusted by the distance adjustment structure. The frame 5 is made of 304 stainless steel plate with a thickness of 2-3 mm and a sheet metal process. Example

[0030] Based on Example 1, this example provides a combined ultrasonic manual detection device for transverse defects of spiral pipe welds, such as Figure 4 As shown, the probe suspension rotating mechanism includes an X-axis rotating shaft 2-11, a Y-axis rotating shaft 2-31 and a Z-axis rotating shaft 2-22, the X-axis rotating shaft 2-11 is connected to the probe clamping seat 2, the X-axis rotating shaft 2-11 is provided with an X-axis rotating shaft joint sleeve 2-1, the Z-axis rotating shaft 2-22 is connected to the X-axis rotating shaft joint sleeve 2-1 and the two are perpendicular, the Z-axis rotating shaft 2-22 is provided with a Z-axis rotating shaft joint sleeve 2-2, the Z-axis rotating shaft joint sleeve 2-2 is vertically connected to the Y-axis rotating shaft 2-31, and the Y-axis rotating shaft 2-31 is provided with a Y-axis rotating shaft joint limiting sleeve 2-3, a Y-axis rotating shaft joint sleeve 2-4 and a probe suspension assembly positioning sleeve 2-5 in sequence; The Y-axis rotary axis joint limit sleeve 2-3 is fixedly connected to the Y-axis rotary axis 2-31, the Z-axis rotary axis joint sleeve 2-2 is fixed to the Z-axis rotary axis 2-22 by a Z-axis locking screw, and the probe suspension assembly positioning sleeve 2-5 is fixed to the Y-axis rotary axis 2-31 by a positioning sleeve locking screw 2-51.

[0031] Since the measured values ​​of K values ​​of the two ultrasonic probes are required to be the same to ensure that the incident sound beam can be received by the receiving probe to the maximum extent after being reflected by the defect, the angle between ultrasonic probe 1 and the horizontal is 45°. Figure 3 As shown, during the inspection, ensure that the sound beam axes of the two ultrasonic probes 1 intersect at the part to be inspected, the two ultrasonic probes 1 transmit and receive one, the 45° emission angle of the sound beam is consistent with the spacing AB and is centered, and accurate inspection is performed on typical defects such as the transverse crack X in the weld. The inspection device is carried out simultaneously on both sides of the weld and moves in the same direction parallel to the center line of the weld.

[0032] like Figure 1 As shown, the working principle of Z-axis position adjustment and debugging: Loosen the Z-axis locking screw, rotate the probe clamp 2 horizontally, and rotate the Z-axis rotation axis 2-22 to the preset angle. After adjustment, tighten the Z-axis locking screw.

[0033] X-axis position adjustment and debugging working principle: By rotating the X-axis rotating shaft 2-11, the ultrasonic probe 1 is further adaptively adjusted in cooperation with the Y-axis rotating shaft 2-31, and finally an effective fit with the curved surface of the steel pipe is achieved; the X-axis rotating shaft 2-11 does not need to be locked.

[0034] Working principle of Y-axis position adjustment and debugging: The Y-axis rotary shaft 2-31 is welded to the Z-axis rotary shaft joint sleeve 2-2 and the Y-axis rotary shaft joint limit sleeve 2-3 as a whole; the limitation of the Y-axis rotary shaft 2-31 is achieved by the probe suspension assembly positioning sleeve 2-5 and the positioning sleeve locking screw 2-51; the Y-axis rotary shaft 2-31 can rotate flexibly in the Y-axis rotary shaft joint sleeve 2-4, providing adaptive adjustment of the Y-axis direction for the ultrasonic probe 1 and the probe clamping seat 2, and combining with the X-axis to complete further adaptive adjustment of the probe, and finally achieving effective fitting with the arc surface of the steel pipe; the Y-axis rotary shaft 2-31 does not need to be locked. Example

[0035] On the basis of Example 1, this embodiment provides an ultrasonic manual combined detection device for transverse defects of spiral pipe welds, wherein the walking mechanism includes a front positioning V-shaped roller 4-1, a rear positioning V-shaped roller 4-2, a roller frame 1 4-17 and a roller frame 2 4-21, wherein the roller frame 1 4-17 and the roller frame 2 4-21 are both located in the skeleton 5 and are both connected to the skeleton 5, the roller frame 1 4-17 is connected to the front positioning V-shaped roller 4-1, the roller frame 2 4-21 is connected to the rear positioning V-shaped roller 4-2, the roller frame 1 4-17 is connected to an X-direction rotating device, and the roller frame 2 4-21 is connected to a Y-direction rotating device.

[0036] like Figure 2As shown, the front positioning V-shaped roller 4-1 and the rear positioning V-shaped roller 4-2 have deep grooves, which clamp the double wheel edges on both sides of the weld, so that the detection device always follows the spiral weld direction, ensuring that the distances between the double ultrasonic probes 1 and the weld are equal, and the preset 45° angles are the same. The X-axis rotation device and the Y-axis rotation device make the wheel edges always adapt to the spiral trajectory and fit the pipe body. Example

[0037] On the basis of Example 2, this embodiment provides an ultrasonic manual combined detection device for transverse defects of spiral pipe welds, wherein the spacing adjustment structure includes a connecting plate 3, wherein the connecting plate 3 and the probe suspension rotating mechanism are connected as a whole, wherein a strip hole 3-1 is provided on the connecting plate 3, and a through hole is provided on the hanging machine, wherein the strip hole 3-1 and the through hole are aligned up and down, and then the connecting skeleton 5 and the spacing adjustment structure are fixedly connected by adjusting the locking screw 3-11.

[0038] like Figure 1 and Figure 4 As shown, the Y-axis rotary shaft joint sleeve 2-4 and the connecting plate 3 of the spacing adjustment structure are connected as a whole, and the connecting plate 3 is connected to the frame 5 by adjusting the locking screw 3-11. When the spacing between the two ultrasonic probes 1 needs to be adjusted, the adjusting locking screw 3-11 is loosened, and the connecting plate 3 is pulled outward or pushed inward to move along the strip hole 3-1. After adjusting to a suitable position, the adjusting locking screw 3-11 is tightened. Example

[0039] Based on Example 4, this embodiment provides a combined ultrasonic manual detection device for transverse defects of spiral pipe welds, such as Figure 5 , Figure 6 As shown, the X-direction rotating device includes a front wheel flexible rotating tension spring 4-16, an X-direction rotating center positioning pin 4-13, a front wheel flexible rotating tension spring positioning pin 1 4-14 and a front wheel flexible rotating tension spring positioning pin 2 4-15; The roller frame 4-17 is L-shaped, one end of the roller frame 4-17 is connected to the front positioning V-shaped roller 4-1 through the front wheel axle 4-11, the other end of the roller frame 4-17 is connected to the skeleton 5 through the front wheel flexible rotary tension spring positioning pin 4-14, the inflection point of the roller frame 4-17 is connected to the skeleton 5 through the X-axis rotation center positioning pin 4-13, the front wheel flexible rotary tension spring positioning pin 2 4-15 is arranged in the skeleton 5 and is located above the front positioning V-shaped roller 4-1, one end of the front wheel flexible rotary tension spring 4-16 is connected to the front wheel flexible rotary tension spring positioning pin 1 4-14, and the other end of the front wheel flexible rotary tension spring 4-16 is connected to the front wheel flexible rotary tension spring positioning pin 2 4-15.

[0040] like Figure 5As shown, by utilizing the X-axis rotation center positioning pin 4-13 and the principle of mechanical lever, the front wheel flexible rotation tension spring 4-16 is used to rotate the front positioning V-shaped roller 4-1 as indicated by the arrow, thereby creating a downward elastic force and preload force for the front positioning V-shaped roller 4-1, ensuring that the front positioning V-shaped roller 4-1 is in close contact with the surface of the steel pipe, thereby providing the capability for precise coupling between the ultrasonic probe 1 and the pipe body. Example

[0041] On the basis of Example 4, this embodiment provides an ultrasonic manual combined detection device for transverse defects of spiral pipe welds, wherein the Y-axis rotating device includes a rear wheel rotating shaft sleeve 4-24 and a rear wheel rotating shaft 4-22, the rear positioning V-shaped roller 4-2 is connected to one end of the roller frame 4-21 through the rear wheel shaft 4-25, the other end of the roller frame 4-21 is connected to the rear wheel rotating shaft 4-22, the rear wheel rotating shaft sleeve 4-24 is sleeved on the rear wheel rotating shaft 4-22, and the rear wheel rotating shaft 4-22 and the rear wheel rotating shaft sleeve 4-24 are connected by a limit screw 4-23.

[0042] like Figure 7 As shown, the rear positioning V-shaped roller 4-2 is connected through the roller frame 4-21, rotated through the rear wheel rotating shaft 4-22, and the rear wheel rotating shaft is inserted into the rear wheel rotating shaft sleeve 4-24; the Y-axis rotating device ensures that the two wheel edges of the rear positioning V-shaped roller 4-2 are always adaptively rotated and evenly and vertically attached to the surface of the steel pipe.

[0043] The adaptive rotation of the rear positioning V-shaped roller 4-2 in the Y direction cooperates with the flexible shock-absorbing adaptability of the front positioning V-shaped roller 4-1 in the X direction, ensuring that the four wheel edges of the two rollers are always in close contact with the pipe body surface on both sides of the weld. Example

[0044] On the basis of Example 1, this embodiment provides an ultrasonic manual combined detection device for transverse defects of spiral pipe welds, wherein the probe clamping seat 2 includes a C-shaped steel and connecting ears, the connecting ears are arranged at the two ends of the top of the C-shaped steel, the probe suspension rotating mechanism is connected to the probe clamping seat 2 through the connecting ears, and the ultrasonic probe 1 is fixed in the probe clamping seat 2 through the probe locking screws 2-01 symmetrically arranged on both sides of the C-shaped steel. Example

[0045] This embodiment provides a method for detecting transverse defects of spiral pipe welds, using a spiral pipe weld transverse defect ultrasonic manual combined detection device, including the following steps: Step 1) Adjust the two ultrasonic probes 1 to a 45° horizontal angle for installation through the probe suspension rotation mechanism; Step 2) Hold the detection device and move it along the direction of the spiral weld, and ride the front positioning V-shaped roller 4-1 and the rear positioning V-shaped roller 4-2 on the spiral steel pipe weld; Step 3) One ultrasonic probe 1 sends a signal, and the other ultrasonic probe 1 receives the signal. The sound beam axes of the two ultrasonic probes 1 intersect at the part to be detected, and the surface defects perpendicular to the detection surface are found, thereby realizing the detection of lateral defects.

[0046] During the transverse defect detection process, the front positioning V-shaped roller 4-1 and the rear positioning V-shaped roller 4-2 respectively make the roller edge 4-12 close to the surface of the steel pipe through the X-axis rotating device and the Y-axis rotating device, providing the ability for precise coupling between the probe and the steel pipe.

[0047] The coupling agent uses water or chemical paste to ensure the accuracy of the flaw detection results of the probe device. The present invention uses the probe suspension rotation mechanism to firstly make the ultrasonic probe 1 have adaptive ability to ensure that the ultrasonic probe 1 is parallel and coupled to the steel pipe surface to the maximum extent; secondly, it ensures that the sound beam axes of the two ultrasonic probes 1 intersect at the part to be detected. This detection method can be used to find planar defects perpendicular to the detection surface, and to find transverse defects in weld detection. The X-axis rotation device and the Y-axis rotation device ensure that the two wheel edges of the front positioning V-shaped roller 4-1 and the rear positioning V-shaped roller 4-2 of the ultrasonic probe 1 continuously fit the pipe body on both sides of the weld, so that the ultrasonic probe 1 fits the pipe wall securely and the flaw detection walking trajectory conforms to the spiral shape.

[0048] In summary, the present invention solves the problem that the transverse defects of spiral pipe welds were previously qualitatively determined by the experience of inspectors, but the qualitative accuracy is low, and realizes the rapid positioning of transverse defects of spiral pipe welds, provides a reliable basis for weld defect repair, improves the transverse defect detection rate, and ensures product quality. The detection device fills the gap in the industry, has low production cost and low production difficulty.

[0049] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A spiral pipe weld transverse defect ultrasonic manual combined detection device, Features: It includes a skeleton, a probe suspension rotating mechanism and a walking mechanism. The probe suspension rotating mechanism is symmetrically arranged on both sides of the skeleton. The front end of the probe suspension rotating mechanism is connected to an ultrasonic probe through a probe clamping seat. The probe suspension rotating mechanism can perform rotation adjustment on the ultrasonic probe in the X, Y and Z directions. The walking mechanism is connected to the skeleton, and the walking mechanism includes rollers. The walking mechanism is connected to an X-direction rotating device and a Y-direction rotating device. The X-direction rotating device and the Y-direction rotating device are used to make the rollers close to the surface of the steel pipe.

2. According to claim 1, a spiral pipe weld transverse defect ultrasonic manual combined detection device, Features: A spacing adjustment structure is provided between the probe suspension rotating mechanism and the frame.

3. According to claim 1, a spiral pipe weld transverse defect ultrasonic manual combined detection device, Features: The probe suspension rotating mechanism comprises an X-axis rotating shaft, a Y-axis rotating shaft and a Z-axis rotating shaft, wherein the X-axis rotating shaft is connected to the probe clamping seat, an X-axis rotating shaft is provided with an X-axis rotating shaft joint sleeve outside the X-axis rotating shaft, the Z-axis rotating shaft is connected to the X-axis rotating shaft joint sleeve and the two are perpendicular, a Z-axis rotating shaft is provided with a Z-axis rotating shaft joint sleeve outside the Z-axis rotating shaft, the Z-axis rotating shaft joint sleeve is vertically connected to the Y-axis rotating shaft, and a Y-axis rotating shaft joint limiting sleeve, a Y-axis rotating shaft joint sleeve and a probe suspension assembly positioning sleeve are sequentially provided outside the Y-axis rotating shaft; The Y-axis rotary shaft joint limiting sleeve is fixedly connected to the Y-axis rotary shaft, the Z-axis rotary shaft joint sleeve is fixed to the Z-axis rotary shaft via a Z-axis locking screw, and the probe suspension assembly positioning sleeve is fixed to the Y-axis rotary shaft via a positioning sleeve locking screw.

4. According to claim 1, a spiral pipe weld transverse defect ultrasonic manual combined detection device, Features: The walking mechanism includes a front positioning V-shaped roller, a rear positioning V-shaped roller, a roller frame 1 and a roller frame 2. The roller frame 1 and the roller frame 2 are both located in the frame and connected to the frame. The roller frame 1 is connected to the front positioning V-shaped roller, the roller frame 2 is connected to the rear positioning V-shaped roller, the roller frame 1 is connected to the X-axis rotating device, and the roller frame 2 is connected to the Y-axis rotating device.

5. According to claim 2, a spiral pipe weld transverse defect ultrasonic manual combined detection device, Features: The spacing adjustment structure includes a connecting plate, which is connected to the probe suspension rotating mechanism as a whole. A strip hole is opened on the connecting plate, and a through hole is provided on the hook. After the strip hole and the through hole are aligned up and down, the connecting frame and the spacing adjustment structure are fixed by adjusting the locking screw.

6. According to claim 4, a spiral pipe weld transverse defect ultrasonic manual combined detection device, Features: The X-direction rotation device comprises a front wheel flexible rotation tension spring, an X-direction rotation center positioning pin, a front wheel flexible rotation tension spring positioning pin 1 and a front wheel flexible rotation tension spring positioning pin 2; The roller frame 1 is L-shaped, and one end of the roller frame 1 is connected to the front positioning V-shaped roller through the front wheel axle, and the other end of the roller frame 1 is connected to the frame through the front wheel flexible rotary tension spring locating pin 1, and the inflection point of the roller frame 1 is connected to the frame through the X-axis rotation center locating pin, and the front wheel flexible rotary tension spring locating pin 2 is arranged in the frame and located above the front positioning V-shaped roller, one end of the front wheel flexible rotary tension spring is connected to the front wheel flexible rotary tension spring locating pin 1, and the other end of the front wheel flexible rotary tension spring is connected to the front wheel flexible rotary tension spring locating pin 2.

7. According to claim 4, a spiral pipe weld transverse defect ultrasonic manual combined detection device, Features: The Y-axis rotating device includes a rear wheel rotating shaft sleeve and a rear wheel rotating shaft, the rear positioning V-shaped roller is connected to one end of the roller frame 2 through the rear wheel shaft, the other end of the roller frame 2 is connected to the rear wheel rotating shaft, the rear wheel rotating shaft sleeve is sleeved on the rear wheel rotating shaft, and the rear wheel rotating shaft and the rear wheel rotating shaft sleeve are connected by a limit screw.

8. A spiral pipe weld transverse defect ultrasonic manual combined detection device according to any one of claims 1 to 7, Features: The probe clamping seat includes a C-shaped steel and connecting ears, the connecting ears are arranged at the two ends of the top of the C-shaped steel, the probe suspension rotating mechanism is connected to the probe clamping seat through the connecting ears, and the ultrasonic probe is fixed in the probe clamping seat through probe locking screws symmetrically arranged on both sides of the C-shaped steel.

9. A method for detecting transverse defects in spiral pipe welds, using the ultrasonic manual combined detection device for transverse defects in spiral pipe welds according to claim 7, Features: The following steps are involved: Step 1) Use the probe suspension rotating mechanism to adjust the incident sound beams of the two ultrasonic probes to form a 45° horizontal angle with the spiral weld; Step 2) Hold the detection device and move it along the direction of the spiral weld, and ride the front positioning V-shaped roller and the rear positioning V-shaped roller on the weld of the spiral steel pipe; Step 3) One ultrasonic probe sends a signal and the other ultrasonic probe receives the signal. The axes of the sound beams of the two ultrasonic probes intersect at the location to be inspected, and planar defects perpendicular to the inspection surface are detected, thereby realizing the detection of lateral defects.

10. A spiral pipe weld transverse defect detection method according to claim 9, Features: During the transverse defect detection process, the front positioning V-shaped roller and the rear positioning V-shaped roller respectively make the roller edges close to the surface of the steel pipe through the X-axis rotating device and the Y-axis rotating device, providing the ability for precise coupling between the probe and the steel pipe.

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