A device for detecting a pipe weld

Abstract

The utility model discloses a kind of detection devices of pipeline weld, the detection device of the pipeline weld includes wrapped main structure, wrapped main structure is connected with gamma ray bin, gamma ray bin is placed with the wrapped main structure of the pipeline to be detected inside and emits gamma ray, to carry out detection to pipeline weld;Wrapped main structure is connected with hoisting automatic opening and closing structure and fixed ring, steel wire rope connected in hoisting automatic opening and closing structure passes through fixed ring, to be hung to wrapped main structure;Folded inner lining and annular weld centering device bin are equipped in wrapped main structure, to ensure that weld center line is accurately in position and there is no gap between the pipeline to be detected.The detection device of the pipeline weld provided by the utility model reduces the radiation value of construction personnel ionization by gamma ray irradiation, and avoids physical consumption due to other types of work in workshop stopping work and evacuating when gamma ray ionization radiation, improves work efficiency, improves workshop utilization, improves overall work efficiency of project.

Description

Technical Field

[0001] This utility model belongs to the field of marine oil engineering technology, and in particular relates to a detection device for pipeline welds. Background Technology

[0002] In the field of marine engineering, pipeline welds, especially butt welds between 4-inch and 12-inch pipes and fittings, are often difficult to irradiate with a single internal wall (focal length F ≥ pipe radius R) due to factors such as small pipe diameter, large curvature, or length. Therefore, double-wall single-image radiography is mostly used.

[0003] The double-wall single-image radiography method involves placing a gamma source in the heat-affected zone of the weld to inspect a certain area on the other side of the weld. This poses a significant challenge to the radiation protection work for workers and those in the surrounding workshop.

[0004] Therefore, there is an urgent need to design a detection device for pipe welds to solve the problems mentioned above. Utility Model Content

[0005] To address the technical problem mentioned in the background art, where workers are exposed to high doses of ionizing radiation, and other trades in the workshop need to be shut down and evacuated once radiation work is carried out, thus affecting the overall project schedule, a pipe weld inspection device is provided to solve the problem of pipe weld inspection.

[0006] To achieve the above objectives, the specific technical solution of the pipe weld inspection device of this utility model is as follows: A device for inspecting pipe welds includes an enclosed main structure with a gamma-ray chamber connected to it. The gamma-ray chamber emits gamma rays into the enclosed main structure, which contains the pipe to be inspected, to inspect the pipe welds. The enclosed main structure is connected to an automatic lifting and closing structure and a fixing ring. A steel wire rope connected to the automatic lifting and closing structure passes through the fixing ring to lift the enclosed main structure. The enclosed main structure has a pleated inner lining and a circumferential weld center alignment chamber to ensure that the weld centerline is accurately positioned and there is no gap between it and the pipe to be inspected.

[0007] Furthermore, the enclosed main structure includes a first semicircular tube and a second semicircular tube, with the ends of the first semicircular tube and the second semicircular tube abutting and connected.

[0008] Furthermore, a gamma-ray chamber is connected to the first semicircular tube, and an exposure point placement hole is provided between the gamma-ray chamber and the first semicircular tube so that gamma rays are emitted along the exposure point placement hole.

[0009] Furthermore, multiple circumferential weld center alignment chambers are provided at intervals along the inner arms of the first and second semicircular tubes to ensure accurate positioning of the weld.

[0010] Furthermore, the pleated lining is evenly laid on the inner walls of the first and second semicircular tubes to ensure that there are no gaps between the first and second semicircular tubes and the pipe to be tested.

[0011] Furthermore, a closing lock is connected at the hinge of the first and second semicircular tubes to keep the γ source in a closed state during exposure.

[0012] Furthermore, the outer walls of the first and second semicircular tubes are connected by a fist-shaped connection structure, so that the first and second semicircular tubes are hinged together.

[0013] Furthermore, the automatic opening and closing structure for hoisting includes multiple pulleys, which are spaced apart and connected to the outer walls of the first and second semicircular tubes. The steel wire ropes connected to the pulleys pass through the fixing rings to hoist the enclosed main structure.

[0014] Furthermore, a triangular base is connected to the enclosed main structure, which supports the enclosed main structure.

[0015] Furthermore, the triangular base is equipped with an assisted lifting system to lift the enclosed main structure vertically.

[0016] The pipe weld inspection device of this invention has the following advantages: By reducing the radiation levels of gamma-ray ionization to construction workers and avoiding the physical exertion of other trades having to stop work and evacuate due to gamma-ray ionization radiation, this application improves work efficiency, increases workshop utilization, and enhances overall project efficiency, thus ensuring timely product delivery. This application also allows construction workers to work longer hours annually, reduces the range of gamma-ray ionization radiation fields, and allows other trades to work simultaneously in areas outside the affected zone. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the pipe weld inspection device of this utility model; Figure 2 This is a right view of the pipe weld inspection device of this utility model; Figure 3 This is a front view of the enclosed main structure of the pipe weld inspection device of this utility model; Figure 4 This is a left view of the enclosed main structure of the pipe weld inspection device of this utility model; Figure 5 This is a right view of the enclosed main structure of the pipe weld inspection device of this utility model.

[0018] Explanation of markings in the diagram: 1. Wrapped main structure; 101. First semicircular tube; 102. Second semicircular tube; 2. Gamma-ray chamber; 3. Automatic hoisting opening and closing structure; 4. Fixing ring; 5. Pleated inner lining; 6. Circumferential weld center alignment chamber; 7. Exposure point placement hole; 8. Closing lock; 9. Fist-shaped connection structure; 10. Triangular base; 11. Assisted lifting system; 12. Inward conical connection port; 13. Weld excess height chamber; 14. Dark box chamber; 15. Steel wire rope. 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 5 This invention describes a device for inspecting pipe welds.

[0022] like Figure 1 As shown, the pipe weld inspection device of this utility model includes a wrap-around main structure 1, on which a gamma-ray chamber 2 is connected. The gamma-ray chamber 2 emits gamma rays into the wrap-around main structure 1, which contains the pipe to be inspected, to inspect the pipe weld. The wrap-around main structure 1 is connected to an automatic hoisting opening and closing structure 3 and a fixing ring 4. A steel wire rope 15 connected to the automatic hoisting opening and closing structure 3 passes through the fixing ring 4 to hoist the wrap-around main structure 1. The wrap-around main structure 1 is provided with a pleated inner liner 5 and a circumferential weld center alignment chamber 6 to ensure that the weld centerline is accurately positioned and there is no gap between it and the pipe to be inspected.

[0023] By reducing the radiation levels of gamma ionization to construction workers and avoiding the physical exertion of other trades having to stop work and evacuate due to gamma ionization radiation, work efficiency was improved, workshop utilization was increased, and the overall project efficiency was enhanced, thus ensuring timely product delivery.

[0024] Furthermore, such as Figure 1As shown, the enclosed main structure 1 includes a first semicircular tube 101 and a second semicircular tube 102, with the ends of the first semicircular tube 101 and the second semicircular tube 102 abutting each other; a gamma-ray chamber 2 is connected to the first semicircular tube 101, and an exposure point placement hole 7 is provided between the gamma-ray chamber 2 and the first semicircular tube 101 so that gamma rays are emitted along the exposure point placement hole 7; multiple circumferential weld center alignment chambers 6 are provided at intervals along the inner arms of the first semicircular tube 101 and the second semicircular tube 102 so that the weld is accurately positioned.

[0025] In this embodiment, preferably, the wrap-around main structure 1 is composed of a first semicircular tube 101 and a second semicircular tube 102. Both sides of the first semicircular tube 101 and the second semicircular tube 102 are provided with inclined surfaces of matching shape. The first semicircular tube 101 and the second semicircular tube 102 are combined by the inclined surfaces to form a cylindrical wrap-around main structure 1, so that the pipe to be tested can be inserted into the wrap-around main structure 1 for weld inspection.

[0026] The gamma-ray chamber 2 is equipped with a gamma-ray machine. Before the gamma-ray machine is placed into the gamma-ray chamber 2, the source conduit is connected. Then, the gamma-ray machine and the source conduit are positioned along the exposure point placement hole in the enclosed main structure. At this time, the source conduit is flush with the inner side of the enclosed main structure, that is, flush with the inner side of the first semi-circular tube 101.

[0027] The circumferential weld center alignment chamber 6 is located at the top axial center of the inner side of the enclosed main structure 1, that is, inside the center line of the first semicircular tube 101 and the second semicircular tube 102. A fine light generator (powered by a replaceable button battery) is placed inside the center line of the first semicircular tube 101 and the second semicircular tube 102. A fine light generator (powered by a replaceable button battery) is placed at a symmetrical position at the lower axial center of the inner side of the first semicircular tube 101 and the second semicircular tube 102, for a total of 3, to accurately locate the weld center line and ensure that the device is accurately positioned.

[0028] Furthermore, such as Figure 1 and Figure 2 As shown, the pleated inner liner 5 is evenly laid on the inner wall of the first semicircular tube 101 and the second semicircular tube 102 so that there is no gap between the first semicircular tube 101 and the second semicircular tube 102 and the pipe to be tested; a closing lock 8 is connected at the hinge of the first semicircular tube 101 and the second semicircular tube 102 so that the γ source is kept closed during exposure; a fist-shaped connection structure 9 is connected to the outer wall of the first semicircular tube 101 and the second semicircular tube 102 so that the first semicircular tube 101 and the second semicircular tube 102 are hinged together.

[0029] In this embodiment, preferably, the pleated inner liner 5 is made of soft lead material and is used at the contact surfaces of the first semicircular tube 101 and the second semicircular tube 102 with the tube to prevent poor contact due to substandard ellipticity of the tube, so as to ensure that there is no gap between the first semicircular tube 101 and the second semicircular tube 102 and the tube, and to ensure that there is no gap between the γ-ray chamber 2 and the first semicircular tube 101, preventing the leakage of unattenuated γ-rays.

[0030] The fist-shaped connection structure 9 connects the first semicircular tube 101 and the second semicircular tube 102 in a hinged manner. When closing, the long strip bolt is inserted into the bolt holes on both sides of the first semicircular tube 101 and the second semicircular tube 102 and then fixed with nuts to prevent the long strip bolt from falling off and causing a safety accident.

[0031] Furthermore, such as Figures 3 to 5 As shown, the automatic opening and closing structure 3 includes multiple pulleys, which are spaced apart and connected to the outer walls of the first semicircular tube 101 and the second semicircular tube 102. The steel wire rope 15 connected to the pulleys passes through the fixing ring 4 to hoist the wrap-around main structure 1. A triangular base 10 is connected to the wrap-around main structure 1 to support it. An auxiliary lifting system 11 is provided on the triangular base 10 to lift the wrap-around main structure 10 vertically.

[0032] In this embodiment, preferably, the hoisting automatic opening and closing structure 3 uses 2 steel wire ropes and 4 pulleys, with the radially coplanar structures forming one group, and a total of 2 groups used together; after the long strip bolt is inserted to fix the nut, one end of the steel wire rope 15 is passed through the pulleys one after another, and the same-side fixing ring is placed in the pulleys, and then both ends are placed into the crane hook belt. The same operation is performed on the opposite side. When the crane is lifting, the first semicircular tube 101 and the second semicircular tube 102 are opened by inserting the long bolt as the axis. After the first semicircular tube 101 and the second semicircular tube 102 are placed in place, the long bolt is inserted as the axis and rotated to close them. First, the two lower closing locks are locked with two pins, and then the two upper closing locks are locked with two pins. Then, wait for exposure.

[0033] Among them, the fixing ring 4 is a push-open closed-loop steel wire rope fixing ring, which is connected to the inner side of the connection of the fist-shaped connecting structure 9 at the top of the wrap-around main structure 1. When using the automatic opening and closing structure function of hoisting, the steel wire rope 15 can be conveniently and quickly put in after the fixing ring 4 is pressed and then released to fix the position of the steel wire rope 15 and ensure safety.

[0034] A closing lock 8 is installed at four positions on the upper and lower sides of the first semicircular tube 101 and the second semicircular tube 102. Pins are used simultaneously to fix the first semicircular tube 101 and the second semicircular tube 102 together and to keep them in the closed state during γ source exposure.

[0035] Preferably, the triangular base 10 is a separable and overlapping triangular base. According to the actual use, the base and the wrap-around main structure 1 are designed to be detachable. The wrap-around main structure 1 is placed on the thin plate of the triangular base 10 and connected to it with a support rod by thread. When separated, it can be used with the crane hook. Because the triangle shape has stability, the side of the support base is designed as a triangle. After the first semicircular tube 101 and the second semicircular tube 102 are closed, a double triangle support is formed. After separation, both sides are independent triangles.

[0036] A power-assisted lifting system 11 is mounted on the triangular base 10, which has a lifting function to match the height of the tube on the rotating tire; wheels are installed under the base for manual movement during use. Preferably, the power-assisted lifting system 11 is mounted on the triangular base 10 and mainly consists of a support plate, spring, gear, sleeve, and rotating handle; when raising, rotating the handle clockwise applies an upward elastic force to the support rod to assist in raising the height; the small gear drives the large gear to reduce manual output.

[0037] As a preferred embodiment, the connection between the gamma-ray chamber 2 and the first semi-circular tube 101 is designed to match the external shape of the gamma-ray machine's source outlet side, namely, an inward-facing conical connection port 12. A pleated soft lead sheet is arranged around the connection to ensure a seamless connection, thereby ensuring that the radiation intensity value of the gamma source after exiting the source container is ≤0.02 mSv / h at a distance of 100 cm from the surface of the source container, as specified in the "Industrial Flaw Detection Radiation Protection Standard" GBZ117-2022.

[0038] To ensure good contact between the enclosed main structure 1 and the pipe wall, the influence of weld excess height must be eliminated. This is achieved by setting a weld excess height chamber 13 on the inner surface of the enclosed main structure 1, i.e., digging outwards a groove that can cover the weld excess height.

[0039] Meanwhile, to ensure that the cassette does not fall off or get squeezed during filming, a cassette compartment 14 is provided on the enclosed main structure 1, which is a groove on the inner surface that can be cut outwards to accommodate the cassette.

[0040] Based on the detection device for pipeline welds, this utility model can enable construction workers to work longer hours each year, reduce the range of ionizing radiation field of gamma-ray operations, and allow other types of work in other areas to work simultaneously, further improving workshop utilization, improving overall project efficiency, and providing a guarantee for the smooth delivery of products. It can be widely promoted and used in projects.

[0041] 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 inspecting pipe welds, characterized in that, It includes a wrap-around main structure, on which a gamma-ray chamber is connected. The gamma-ray chamber emits gamma rays into the wrap-around main structure, into which the pipe to be inspected is placed, in order to inspect the pipe welds. The enclosed main structure is connected to an automatic hoisting opening and closing structure and a fixing ring. The steel wire rope connected to the automatic hoisting opening and closing structure passes through the fixing ring to hoist the enclosed main structure. The enclosed main structure is equipped with a pleated inner lining and a circumferential weld center alignment chamber to ensure that the weld centerline is accurately positioned and there is no gap between it and the pipeline to be inspected.

2. The pipe weld inspection device according to claim 1, characterized in that, The enclosed main structure includes a first semicircular tube and a second semicircular tube, with the ends of the first semicircular tube and the second semicircular tube abutting and connected.

3. The pipe weld inspection device according to claim 2, characterized in that, A gamma-ray chamber is connected to the first semicircular tube, and an exposure point placement hole is provided between the gamma-ray chamber and the first semicircular tube so that gamma rays are emitted along the exposure point placement hole.

4. The pipe weld inspection device according to claim 2, characterized in that, Multiple circumferential weld center alignment chambers are provided at intervals along the inner arms of the first and second semicircular tubes to ensure accurate positioning of the weld.

5. The pipe weld inspection device according to claim 2, characterized in that, The pleated lining is evenly laid on the inner walls of the first and second semicircular tubes to ensure that there are no gaps between the first and second semicircular tubes and the pipe to be tested.

6. The pipe weld inspection device according to claim 2, characterized in that, A closing lock is connected at the hinge of the first and second semicircular tubes to keep the γ source in a closed state during exposure.

7. The pipe weld inspection device according to claim 2, characterized in that, The outer walls of the first and second semicircular tubes are connected by a fist-shaped connection structure, so that the first and second semicircular tubes are hinged together.

8. The pipe weld inspection device according to claim 1, characterized in that, The automatic opening and closing hoisting structure includes multiple pulleys, which are spaced apart and connected to the outer walls of the first and second semicircular tubes. The steel wire ropes connected to the pulleys pass through the fixing rings to hoist the enclosed main structure.

9. The pipe weld inspection device according to claim 1, characterized in that, The main wrap-around structure is connected to a triangular base, which supports the main wrap-around structure.

10. The pipe weld inspection device according to claim 9, characterized in that, The triangular base is equipped with an assisted lifting system to lift the enclosed main structure vertically.

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