A device for detecting a hardfacing layer on an inner wall of a pipe

Abstract

The utility model discloses a kind of pipe inner wall surfacing layer detection devices, the pipe inner wall surfacing layer detection device includes cylindrical main structure, the port of cylindrical main structure is equipped with threaded connector, probe detection module main body is connected by threaded connector, along the port direction of cylindrical main structure insertion pipe to be detected, to make probe detection module main body detect the pipe inner wall surfacing layer to be detected;Probe detection module main body is equipped with probe installation bin and couplant transmission pipeline, couplant transmission pipeline is connected with couplant flow guide groove, couplant flow guide groove shunts couplant to probe wedge and pipe to be detected surface, to make ultrasonic wave into pipe to be detected for detection.The utility model provides pipe inner wall surfacing layer detection device solves the problem that handheld ultrasonic detection probe cannot enter valve cover interior due to its inner wall structure position and smaller inner diameter, leading to probe and internal cannot be well coupled and defect is difficult to accurately position, and design is simple.

Description

Technical Field

[0001] This utility model belongs to the field of marine oil engineering technology, and in particular relates to a device for detecting the weld overlay layer on the inner wall of pipe fittings. Background Technology

[0002] The components of the submersible wellhead, namely the valve cover, require ultrasonic testing after the rough machining of the weld overlay (material: Ni625) on its inner wall. The relevant technical documents require that the ultrasonic testing be performed in accordance with the ASME V, A Part, Chapter 4 T-473.1 Technical 1: inspection from the surface of the weld metal overlay.

[0003] However, after rough machining, the inner diameter of the valve cover is mostly between φ27.5mm and φ185mm. There are defects such as the small inner diameter, which prevents the handheld probe from entering the valve cover for detection, and in some positions, even if the handheld probe can enter, the internal curvature is too large, which causes the probe to not couple well with the inner surface. This makes it difficult to accurately locate and quantify.

[0004] Therefore, there is an urgent need to design a device for detecting the weld overlay on the inner wall of pipe fittings to solve the problems mentioned above. Utility Model Content

[0005] To address the technical problems mentioned in the background art, such as the inability of handheld probes to enter the valve cover for inspection and the inability of the probe to properly couple with the inner surface due to excessive internal curvature in some locations, a device for detecting weld overlay on the inner wall of pipe fittings is provided to solve the problem of detecting weld overlay on the inner wall of pipe fittings.

[0006] To achieve the above objectives, the specific technical solution of the pipe fitting inner wall weld overlay detection device of this utility model is as follows: A device for detecting the weld overlay on the inner wall of a pipe fitting includes a cylindrical main structure. A threaded connector is provided at the end of the cylindrical main structure, through which a probe detection module body is connected. The pipe fitting to be tested is inserted along the end of the cylindrical main structure, allowing the probe detection module body to detect the weld overlay on the inner wall of the pipe fitting. The probe detection module body is equipped with a probe mounting chamber and a couplant delivery pipe. The couplant delivery pipe is connected to a couplant guide channel, which distributes the couplant to the probe wedge and the surface of the pipe fitting to be tested, allowing ultrasonic waves to be transmitted to the pipe fitting for detection.

[0007] Furthermore, the outer wall of the cylindrical main structure is marked with the first axial positioning mark scale line.

[0008] Furthermore, multiple circumferential positioning mark scale lines are marked at intervals along the outer wall of the cylindrical main structure. The defects of the pipe fitting to be inspected are determined by the first axial positioning mark scale line and the circumferential positioning mark scale line.

[0009] Furthermore, threaded connectors are provided at both ends of the cylindrical main structure.

[0010] Furthermore, a conveying channel is provided inside the cylindrical main structure, and the conveying channel is located at the center of the cylindrical main structure along the length of the cylindrical main structure.

[0011] Furthermore, a detachable bracket is connected to the conveying channel to arrange the probe wires of the probe detection module body.

[0012] Furthermore, both the probe mounting chamber and the coupling agent transmission pipeline are located on one side of the probe detection module body.

[0013] Furthermore, the main port of the probe detection module is equipped with a quick connector, so that the main body of the probe detection module can be connected to the cylindrical main structure through the quick connector.

[0014] Furthermore, a second axial positioning mark scale line is marked along the outer wall of the probe detection module body. The probe detection module body is connected to the cylindrical main structure, and the second axial positioning mark scale line is on the same straight line as the first axial positioning mark scale line.

[0015] Furthermore, multiple couplant guide channels are connected circumferentially along the main cylindrical structure, and couplant transmission pipes are connected to the multiple couplant guide channels respectively, so that the couplant is diverted between the probe wedge and the surface of the pipe to be tested.

[0016] The pipe fitting inner wall weld overlay detection device of this utility model has the following advantages: This invention achieves good coupling between the probe and the inspected surface, reduces human error in handheld probe testing, improves the quantitative and positioning accuracy of ultrasonic testing, enhances ultrasonic testing sensitivity and efficiency, and ensures product quality. This application solves the problems caused by the small inner diameter and structural position of the inner wall, which prevent handheld ultrasonic probes from entering the valve cover or to certain areas. Even when the probe does enter, the excessive internal curvature leads to poor coupling between the probe and the interior, making precise defect location difficult. Furthermore, the design is simple and easy to operate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the cylindrical main structure of the pipe fitting inner wall weld overlay detection device of this utility model; Figure 2 This is a right view of the cylindrical main structure of the pipe fitting inner wall weld overlay detection device of this utility model; Figure 3 This is a cross-sectional view of the cylindrical main structure of the pipe fitting inner wall weld overlay detection device of this utility model; Figure 4 This is a left view of the cylindrical main structure of the pipe fitting inner wall weld overlay detection device of this utility model; Figure 5This is a schematic diagram of the conventional probe detection module structure of the probe detection module body of the pipe fitting inner wall weld overlay detection device of this utility model; Figure 6 This is a left view of the conventional probe detection module of the pipe fitting inner wall weld overlay detection device of this utility model; Figure 7 This is a schematic diagram of the phased array ultrasonic testing module of the pipe fitting inner wall weld overlay detection device of this utility model; Figure 8 This is a schematic diagram of the semi-arc-shaped full-size phased array wedge block of the pipe fitting inner wall weld overlay detection device of this utility model; Figure 9 This is a left view of the phased array encoder compartment of the pipe fitting inner wall weld overlay detection device of this utility model.

[0018] Explanation of markings in the diagram: 1. Cylindrical main structure; 2. Threaded connector; 3. Probe detection module body; 4. Probe mounting compartment; 5. Coupling agent transmission pipeline; 6. Coupling agent guide channel; 7. First axial positioning mark scale line; 8. Second axial positioning mark scale line; 9. Circumferential positioning mark scale line; 10. Conveying channel; 11. Detachable bracket; 12. Quick connector; 13. Phased array encoder compartment; 14. Semi-arc full-size phased array wedge block. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0021] The following is a reference to the appendix. Figure 1 To be continued Figure 9 This invention describes a device for detecting the weld overlay layer on the inner wall of pipe fittings.

[0022] like Figures 1 to 4As shown, the pipe fitting inner wall weld overlay detection device of this utility model includes a cylindrical main structure 1. The port of the cylindrical main structure 1 is provided with a threaded connector 2, which is connected to the probe detection module body 3. The pipe fitting to be tested is inserted along the port of the cylindrical main structure 1 so that the probe detection module body 3 can detect the weld overlay on the inner wall of the pipe fitting. The probe detection module body 3 is provided with a probe mounting chamber 4 and a coupling agent transmission pipe 5. The coupling agent transmission pipe 5 is connected to a coupling agent guide channel 6. The coupling agent guide channel 6 diverts the coupling agent to the probe wedge and the surface of the pipe fitting to be tested so that the ultrasonic wave is transmitted to the pipe fitting to be tested for detection.

[0023] This application achieves good coupling between the probe and the surface being inspected, reduces human factors in handheld probe inspection, improves the quantitative and positioning accuracy of ultrasound, enhances the sensitivity and efficiency of ultrasound inspection, and ensures product quality. It solves the problems that the handheld ultrasonic probe cannot enter the valve cover or only partially due to the influence of its internal wall structure and small inner diameter. Even if the handheld ultrasonic probe enters the interior, the large internal curvature makes it difficult to couple the probe well with the interior and to accurately locate defects. Moreover, the design is simple and easy to operate.

[0024] Furthermore, such as Figures 1 to 4 As shown, a first axial positioning mark scale line 7 is marked along the outer wall of the cylindrical main structure 1; multiple circumferential positioning mark scale lines 9 are marked along the outer wall of the cylindrical main structure 1 at intervals. The defects of the pipe fitting to be inspected are determined by the first axial positioning mark scale line 7 and the circumferential positioning mark scale lines 9; threaded connectors 2 are provided at both ends of the cylindrical main structure 1.

[0025] The probe detection module body 3 includes a conventional probe detection module and a phased array ultrasonic detection module. In this embodiment, preferably, the first axial positioning mark scale line 7 and the circumferential positioning mark scale line 9 are used together to determine the axial position of the center of the conventional probe and the phased array probe within the valve cover of the component and to measure the axial dimension of the detected defect, ensuring complete coverage of the detection area.

[0026] Since both ends of the cylindrical main structure 1 are provided with threaded connectors 2, the cylindrical main structure 1 can be extended by connecting the threaded connectors 2. The extendable cylindrical main structure 1 module has first axial positioning mark scale lines 7 distributed every 120 degrees around the interface position perpendicular to the axis of the cylinder. The axial center lines of the conventional probe detection module and the phased array ultrasonic detection module coincide with the first axial positioning mark scale lines 7 in the axial direction.

[0027] Furthermore, such as Figures 3 to 5As shown, the cylindrical main structure 1 has a conveying channel 10 inside, which is located at the center of the cylindrical main structure 1 along the length of the cylindrical main structure 1; a detachable bracket 11 is connected to the conveying channel 10 to arrange the probe wires of the probe detection module body 3; the probe installation chamber 4 and the coupling agent transmission pipe 5 are both located on one side of the conventional probe detection module.

[0028] In this embodiment, the conveying channel 10 is used to convey the probe wire, encoder wire, and coupling agent transmission tube, and plays a protective role during the detection process. Preferably, there are 6 detachable brackets 11 placed at each end of the conveying channel 10 every 120 mm in the circumferential direction. These brackets are used to support and fix the probe wire, encoder wire, and coupling agent transmission tube 5, so that the various wires are neatly arranged and protected. They also facilitate the troubleshooting of unexpected problems during the detection process. The detachable brackets 11 are of uniform specifications and, like the brackets in other positions, are made of materials with certain strength, plasticity, and elasticity.

[0029] The probe mounting chamber 4 is a push-in type probe mounting chamber. After connecting the probe and probe wire, it is placed into the push-in type probe mounting chamber 4, so that the constant force pressure module of the probe mounting chamber 4 is in a compressed state. Then, push the side pusher of the conventional probe detection module. When the probe enters the probe mounting chamber 4, release the constant force pressure module of the probe chamber. At this time, keep pushing the pusher until the probe is in place. The coupling agent transmission pipe 5 is used to transmit the coupling agent delivered by the coupling agent transmission pipe, so as to realize the coupling agent diversion between the probe wedge and the surface of the pipe to be tested.

[0030] Furthermore, such as Figures 5 to 9 As shown, the probe detection module body 3 has a quick connector 12 at its port, so that the probe detection module body 3 can be connected to the cylindrical main structure 1 through the quick connector 12; a second axial positioning mark scale line 8 is marked along the outer wall of the probe detection module body 3, and the probe detection module body 3 is connected to the cylindrical main structure 1, with the second axial positioning mark scale line 8 and the first axial positioning mark scale line 7 on the same straight line; multiple coupling agent guide channels 6 are connected circumferentially along the cylindrical main structure 1, and the coupling agent transmission pipe 5 is connected to the multiple coupling agent guide channels 6 respectively, so that the coupling agent is diverted between the probe wedge and the surface of the pipe to be tested.

[0031] In this embodiment, preferably, the quick connector 12 is used to connect the coupling agent transmission pipe 5 and the transmission pipe provided on the main body of the conventional probe detection module.

[0032] In a preferred embodiment, to ensure the sound insulation layer remains perpendicular to the probe's movement direction, the conventional probe testing module has three conventional probe compartments designed at intervals of 120 mm around the main body of the module, perpendicular to the cylinder axis: one for a dual-crystal straight probe (to ensure the testing direction is perpendicular to the sound insulation layer, simply rotate the probe 90 degrees inside the compartment and tighten it); one for a dual-crystal angled probe for testing along the cylinder axis; and another for a dual-crystal angled probe for testing along the cylinder's radial and circumferential directions. The parameters of the three probes can be adjusted before testing and loaded into the conventional probe testing module; only the ultrasonic instrument channel needs to be changed during testing. Because the conventional probe contains a wedge-shaped component, a custom probe is designed based on the curvature of the valve cover inner wall of the component being tested, the stepped shape of the conventional probe compartment's outer surface, and the required probe focusing depth.

[0033] The main body of the phased array probe detection module is designed with two phased array probe compartments at 120 degrees each, at the interface perpendicular to the cylinder axis, to ensure that the sound insulation layer and the probe movement direction remain perpendicular. These compartments house the straight probe compartment and the angled probe compartment (longitudinal wave) for axial and circumferential detection, respectively. The encoder compartment is designed at the third 120-degree position.

[0034] Preferably, the phased array probe is coupled to the inner surface of the valve cover of the component through a semi-arc full-size phased array wedge 14; the phased array probe is focused within the Ni625 layer welded to the inner wall of the valve cover of the component; the full-size wedge allows the phased array probe to be installed in the axial detection direction or in the circumferential detection direction, and enables the application of coupling agent.

[0035] Once the phased array probe chamber is fixed on the semi-arc full-size phased array wedge 14, and the coupling agent pipeline is connected to the corresponding position on the semi-arc full-size phased array wedge, the entire assembly is installed into the phased array probe chamber from the side of the phased array ultrasonic testing module with scale markings. The constant force pressure module inside the phased array probe chamber applies a constant force to the probe and wedge to ensure the coupling strength during the testing process.

[0036] Among them, the phased array encoder compartment 13 adopts a cross-shaped multi-compartment installation method, that is, it is installed in the axial and circumferential directions for data recording during axial and circumferential detection; the phased array encoder compartment 13 has a built-in shock absorption module on the center side of the phased array ultrasonic detection module, which makes contact with the welded surface of the valve cover inner wall with adaptive force and prevents coaxial rotation.

[0037] Meanwhile, a second axial positioning mark scale line 8 is marked along the outer wall of the probe detection module body 3. The probe detection module body 3 is connected to the cylindrical main structure 1. The second axial positioning mark scale line 8 and the first axial positioning mark scale line 7 are on the same straight line. When reading the position, the second axial positioning mark scale line 8 is used as the inspiration scale for position reading.

[0038] Based on the pipe fitting inner wall weld overlay detection device, this utility model achieves good coupling between the probe and the surface being inspected, reduces human factors in handheld probe detection, improves ultrasonic quantitative and positioning accuracy, enhances ultrasonic detection sensitivity and work efficiency, and ensures product quality.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A device for detecting the weld overlay on the inner wall of a pipe fitting, characterized in that, It includes a cylindrical main structure, with threaded connectors at the ends of the cylindrical main structure. The probe detection module body is connected through the threaded connectors. The pipe to be tested is inserted along the ends of the cylindrical main structure so that the probe detection module body can detect the weld overlay layer on the inner wall of the pipe to be tested. The main body of the probe detection module is equipped with a probe mounting chamber and a couplant transmission pipe. The couplant transmission pipe is connected to the couplant guide channel, which diverts the couplant to the probe wedge and the surface of the pipe to be tested, so that the ultrasonic waves can be transmitted to the pipe to be tested for detection.

2. The pipe fitting inner wall weld overlay detection device according to claim 1, characterized in that, The outer wall of the cylindrical main structure is marked with the first axial positioning mark scale line.

3. The pipe fitting inner wall weld overlay detection device according to claim 2, characterized in that, Multiple circumferential positioning mark scale lines are marked at intervals along the outer wall of the cylindrical main structure. The defects of the pipe fitting to be inspected are determined by the first axial positioning mark scale line and the circumferential positioning mark scale line.

4. The pipe fitting inner wall weld overlay detection device according to claim 1, characterized in that, Both ends of the cylindrical main structure are equipped with threaded connectors.

5. The pipe fitting inner wall weld overlay detection device according to claim 1, characterized in that, The cylindrical main structure has a conveying channel inside, which is located at the center of the cylindrical main structure along its length.

6. The pipe fitting inner wall weld overlay detection device according to claim 5, characterized in that, A detachable bracket is connected to the conveying channel to arrange the probe wires of the probe detection module body.

7. The pipe fitting inner wall weld overlay detection device according to claim 6, characterized in that, The probe mounting compartment and the coupling agent transmission pipeline are both located on one side of the probe detection module body.

8. The pipe fitting inner wall weld overlay detection device according to claim 7, characterized in that, The main port of the probe detection module is equipped with a quick connector, which allows the main body of the probe detection module to be connected to the cylindrical main structure via the quick connector.

9. The pipe fitting inner wall weld overlay detection device according to claim 1, characterized in that, The outer wall of the probe detection module body is marked with a second axial positioning mark scale line. The probe detection module body is connected to the cylindrical main structure. The second axial positioning mark scale line and the first axial positioning mark scale line are on the same straight line.

10. The pipe fitting inner wall weld overlay detection device according to claim 1, characterized in that, Multiple couplant guide channels are spaced apart along the circumference of the cylindrical main structure. The couplant transmission pipe is connected to the multiple couplant guide channels to divert the couplant between the probe wedge and the surface of the pipe to be tested.

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