Nuclear power plant operation and maintenance pipeline detection equipment
By designing ultrasonic detection equipment and combining the linkage structure of the pipe table and the detection pipe seat, the problem of high difficulty in plug weld detection in pipeline inspection in nuclear power plant is solved, and efficient multi-point detection and highly adaptable detection effects are achieved.
Patent Information
- Application Number
- CN202421812568.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In the pipeline inspection of nuclear power plants, the detection of the ray plug weld is difficult, which makes the inspection work time-consuming and labor-intensive and inefficient, especially in the detection dead corners of the ring distribution.
A nuclear power plant operation and maintenance pipeline detection equipment is designed, using ultrasonic detection method, combined with the pipe table and the detection tube seat, through the linkage of the wheel fittings and the wheel crank, multi-point non-destructive detection of the plug welds can be achieved. The detection position and angle can be adjusted in real time according to the plug position, and the ultrasonic probe can be used for continuous reflected sound wave imaging.
It improves the detection efficiency, simplifies the detection process, adapts to different pipeline structures, avoids the problem of high local inspection difficulty, and realizes efficient pipeline plug weld detection.
Smart Images
Figure CN223078248U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline detection, and particularly relates to a pipeline detection device for nuclear power plant operation and maintenance. Background Art
[0002] A large number of ray plugs are distributed on the pipelines of the primary and secondary loop systems of nuclear power plants. These plugs are used for regular in-service ray inspections of pipeline welds. Specifically, before ray detection, the sealing joint between the plug and the top of the pipe socket needs to be ground off, and then the plug is screwed out. After inserting a special tool for ray detection, the Ir-192 or Co-60 radiation source is transported to the designated position through a source guiding device to perform ray detection. After the detection is completed, the plug is screwed to the bottom, tightened 90° in the reverse direction, and then the top is sealed and welded back in place.
[0003] The ray plug is also the high-temperature and high-pressure nuclear pressure boundary of the primary and secondary loop systems. In recent years, many emergency incidents caused by the failure of ray plug welds have occurred in nuclear power plants at home and abroad, bringing huge risks to the stable operation of nuclear power units. Usually, during the later pipeline operation and maintenance detection, the inspectors usually use ultrasonic detection to detect the plug welds one by one. However, due to the annular distribution of the pipeline plugs, there are detection dead angles and the detection difficulty is high, making the entire detection work time-consuming, laborious and limited in efficiency. Summary of the Utility Model
[0004] In view of the above technical problems existing in the prior art, a pipeline detection device for nuclear power plant operation and maintenance is provided.
[0005] The purpose and efficacy of the utility model are achieved by the following specific technical means:
[0006] A pipeline detection device for nuclear power plant operation and maintenance includes a pipe platform and a detection pipe socket. The detection pipe socket is fixed on one side of the pipe platform. The pipe platform is a semi-curved platform plate. One end of the pipe platform is fixed with a wheel pipe head, and a wheel pipe chain extends freely from the wheel pipe head to the other end of the pipe platform, and the wheel pipe chain is buckled and matched with the pipe platform.
[0007] An axially combined socket and a probe end are inserted into the detection pipe socket. The probe end is an ultrasonic probe. A wheel pipe part is hinged and matched on the outside of the detection pipe socket, and a curved surface handle is embedded in the wheel pipe part. The curved surface handle is a curved surface probe with a single crystal surface, and the curved surface handle is electrically matched with the probe end.
[0008] A rotating wheel crank is rotatably arranged on the detection pipe socket, and the rotating wheel crank and the wheel pipe part are arranged on the same side. A rotating shaft bearing is arranged for linkage cooperation between the rotating wheel crank and the wheel pipe part.
[0009] Further, a detection box is fixed on the side of the detection pipe socket close to the pipe platform. The detection box is an ultrasonic flaw detector adapter box, and the probe end of the detection box is connected to the socket by plugging.
[0010] Further, the pipe bench is slidably and snap-fastened to the detection pipe socket through a snap-fastening seat provided thereon, and there are multiple snap-fastening height positions on the snap-fastening seat.
[0011] Further, the wheel pipe chain is telescopically engaged with the wheel pipe head, and the wheel pipe chain is composed of double-row nylon ropes.
[0012] Further, the wheel pipe part has an open pipe mouth handle structure, and the articulation amplitude of the wheel pipe part is matched with the rotation angle of the rotating shaft bearing.
[0013] Further, the rotation angle amplitude of the rotating shaft bearing is less than 60 degrees.
[0014] Further, a cylinder shaft is embedded in the rotating wheel crank, and a cam is axially connected between the cylinder shaft and the rotating shaft bearing.
[0015] Further, a gasket ring is fixedly attached to the inner surface of the pipe bench.
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0017] This nuclear power plant operation and maintenance pipeline detection device, based on the ultrasonic detection method and in cooperation with the distribution of the pipe bench and the detection pipe socket, facilitates the detection personnel to install the pipe loop along the pipeline during the detection work, conveniently adjusts the detection positions and angles of the pipe bench and the detection pipe socket in real time according to the plug position, and changes the detection surface of the curved surface handle and the plug weld by cooperating with the real-time adjustment of the wheel pipe part, so as to facilitate multiple multi-point detections, improve the efficiency of the overall detection work, simplify the subsequent detection process with the initial installation, and greatly facilitate the detection work. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;
[0019] Figure 2 is a schematic diagram of the internal planar structure of the detection pipe socket of the present utility model;
[0020] Figure 3 is a schematic diagram of the internal planar structure of the pipe bench of the present utility model.
[0021] Markings in the figure: 1 - pipe bench; 2 - detection pipe socket; 3 - rotating wheel crank; 4 - detection box; 5 - wheel pipe head; 6 - wheel pipe chain; 7 - wheel pipe part; 8 - curved surface handle; 9 - probe end; 10 - socket; 11 - rotating shaft bearing; 12 - cylinder shaft; 13 - gasket ring; 14 - snap-fastening seat. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Please refer to Figures 1-3 , for a further description of the embodiments of the present utility model;
[0023] A nuclear power plant operation and maintenance pipeline detection equipment, comprising a pipe platform 1 and a detection pipe seat 2, wherein the detection pipe seat 2 is fixed on one side of the pipe platform 1, the pipe platform 1 is a semi-curved platform plate, a wheel pipe head 5 is fixed at one end of the pipe platform 1, a wheel pipe chain 6 is freely extended from the wheel pipe head 5 to the other end of the pipe platform 1, and the wheel pipe chain 6 is buckled and matched with the pipe platform 1;
[0024] An axially combined socket 10 and a probe end 9 are inserted in the detection tube seat 2. The probe end 9 is an ultrasonic probe. A wheel pipe 7 is hingedly matched on the outer side of the detection tube seat 2, and a curved handle 8 is embedded in the wheel pipe 7. The curved handle 8 is a curved probe with a single crystal surface. The curved handle 8 is electrically matched with the probe end 9.
[0025] A wheel crank 3 is rotatably arranged on the detection tube seat 2 , and the wheel crank 3 and the wheel tube 7 are arranged on the same side, and a rotating shaft bearing 11 is interlockedly matched between the wheel crank 3 and the wheel tube 7 .
[0026] The device performs nondestructive flaw detection on the pipe plug weld based on the ultrasonic flaw detection detection method. The probe of the flaw detector is mainly connected to the probe end 9 through the socket 10, and the curved handle 8 is used as the band signal emission surface of the probe end 9. After the pipe platform 1 is installed, the wheel pipe 7 is used as the contact surface structure with the plug surface weld. During the detection, the hinge angle of the wheel pipe 7 can be adjusted manually by changing the angle of the rotating wheel crank 3, that is, adjusting the flaw detection angle;
[0027] At the same time, in order to take into account the particularity of the plug positions distributed along the pipeline, the device is installed in an embracing manner by adapting the pipeline structure to the pipeline structure through the set pipe platform 1 and the wheel pipe head 5 and the wheel pipe chain 6 arranged in a ring along the pipe platform 1. At the same time, the installation position of the pipe platform 1 and the pipeline can be adjusted in real time according to the actual plug distribution angle, which improves the applicability of the equipment. Combined with the detection pipe seat 2 on the pipe platform 1, non-destructive detection of plugs at various points is performed. Compared with traditional detection methods, the equipment can facilitate subsequent along-the-way detection of the entire pipe section through initial installation, and avoid the occurrence of high difficulty in local detection position detection through real-time rotation adjustment, thereby improving the applicability and practicality of the equipment and improving the detection efficiency to a certain extent.
[0028] Preferably, a test box 4 is fixed on one side of the test tube holder 2 close to the tube platform 1. The test box 4 is an ultrasonic flaw detector adapter box, and the probe end of the test box 4 is connected to the socket 10 by plugging. The device is connected to the socket 10 by adapter, which facilitates the adjustment of the ultrasonic band signal frequency according to the condition of the pin weld on the test surface during subsequent control.
[0029] Preferably, the pipe base 1 is slidably and snap-fitted to the detection pipe base 2 through the snap-fitting seats 14 provided thereon, and there are multiple snap-fitting height positions on the snap-fitting seats 14 to adapt to different plug welding surface conditions through the multiple snap-fitting height positions, so as to conveniently adjust the vertical distance between the entire detection pipe base 2 and the pipe contact surface according to the real-time detection requirements.
[0030] Preferably, the wheel pipe chain 6 is telescopically fitted with the wheel pipe head 5. The wheel pipe chain 6 is composed of double-row nylon ropes. The caliber when the wheel pipe chain 6 is snap-fitted to the pipe base 1 is adjusted by the telescopic fitting structure of the wheel pipe chain 6 and the wheel pipe head 5 to adapt to the detection of pipelines with different calibers.
[0031] Preferably, the wheel pipe part 7 is an open-ended pipe mouth handle structure, and the articulation amplitude of the wheel pipe part 7 is matched with the rotation angle of the rotating shaft bearing 11. The open structure ensures that the docking matching degree between the wheel pipe part 7 and the plug surface meets the injection angle requirements of the subsequent curved surface handle 8.
[0032] Preferably, the rotation angle amplitude of the rotating shaft bearing 11 is less than 60 degrees. By controlling the rotation angle amplitude range of the rotating shaft bearing 11 within 60 degrees, the detection surface of the entire wheel pipe part 7 can meet the detection point position requirements of the plug weld surface during single-sided detection.
[0033] Preferably, a cylinder shaft 12 is embedded in the rotating wheel crank 3, and a cam is axially connected between the cylinder shaft 12 and the rotating shaft bearing 11. The rotating shaft bearing 11 is indirectly compressed by the protruding end of the cam through the air pressure of the cylinder shaft 12. When the rotating shaft bearing 11 rotates within 60 degrees, the cam can be reset by the pressure of the cylinder shaft 12 to adjust the rotating shaft bearing 11 to the neutral position and reset the wheel pipe part 7, facilitating the subsequent adjustment of the wheel pipe part 7.
[0034] Preferably, a gasket 13 is fixedly attached to the inner surface of the pipe base 1 to improve the degree of fit between the inner surface of the pipe base 1 and the pipe structure and enhance the connection stability between the pipe base 1 and the pipe.
[0035] The implementation manner of this device is as follows:
[0036] During installation, this detection device specifically installs and fixes the pipe base 1 by surrounding the pipeline with the pipe base 1, telescopically adjusting the wheel pipe chain 6 according to the pipe diameter, and finally snap-fitting the wheel pipe chain 6 to the pipe base 1. During subsequent detection along the pipeline, the angular position of the pipe base 1 relative to the pipeline can be rotated and adjusted according to the distribution angle of the plugs.
[0037] During detection, the probe end is connected to the socket 10 through the detection box 4. The open surface of the wheel pipe part 7 is adjusted to match the plug weld surface. Ultrasonic waves are emitted through the probe end 9 and the curved surface handle 8. According to the principle of ultrasonic flaw detection, the continuous reflected sound waves when the ultrasonic waves contact the weld are used to form an image to reflect the porosity, slag inclusion, and crack imaging defects on the weld surface, so as to complete the detection of a single point of the plug weld. During the process, the operator can change the hinge angle of the wheel pipe part 7 relative to the detection pipe socket 2 by rotating the rotating wheel crank 3 along the detection pipe socket 2, that is, change the emission angle between the curved surface handle 8 and the plug weld surface, so as to adjust the detection position. During the process, the air pressure of the cylinder shaft 12 can provide damping pressure for the rotation of the rotating shaft bearing 11, so as to reset the wheel pipe part 7 by using the pressure after releasing the rotating wheel crank 3, so as to facilitate subsequent angle adjustment.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.
Claims
1. A pipeline detection device for operation and maintenance of a nuclear power plant, characterized in that: It includes a pipe base (1) and a detection socket (2). The detection socket (2) is fixed on one side of the pipe base (1). The pipe base (1) is a semi-curved platform plate. One end of the pipe base (1) is fixed with a wheel pipe head (5). The wheel pipe head (5) freely extends a wheel pipe chain (6) towards the other end of the pipe base (1), and the wheel pipe chain (6) is snap-fitted with the pipe base (1). An axially combined socket (10) and a probe end (9) are inserted into the detection socket (2). The probe end (9) is an ultrasonic probe. A wheel pipe part (7) is hinged and fitted on the outside of the detection socket (2), and a curved surface handle (8) is embedded in the wheel pipe part (7). The curved surface handle (8) is a single-crystal surface curved probe, and the curved surface handle (8) is electrically matched with the probe end (9). A rotating wheel crank (3) is rotatably arranged on the detection socket (2), and the rotating wheel crank (3) and the wheel pipe part (7) are arranged on the same side. A rotating shaft bearing (11) is linked and fitted between the rotating wheel crank (3) and the wheel pipe part (7).
2. The nuclear power plant operation and maintenance pipeline detection device according to claim 1, characterized in that: A detection box (4) is fixed on the side of the detection socket (2) close to the pipe base (1). The detection box (4) is an ultrasonic flaw detector adapter box, and the probe end of the detection box (4) is inserted into the socket (10) by plugging.
3. The pipeline detection device for nuclear power plant operation and maintenance according to claim 1, characterized in that: The pipe base (1) is slidably snap-fitted and fixed with the detection socket (2) through a snap-fitting seat (14) opened thereon, and there are multiple snap-fitting height positions on the snap-fitting seat (14).
4. The pipeline detection device for nuclear power plant operation and maintenance according to claim 1, wherein: The wheel pipe chain (6) is telescopically matched with the wheel pipe head (5), and the wheel pipe chain (6) is composed of double-row nylon ropes.
5. The inspection device for the operation and maintenance pipeline of a nuclear power plant according to claim 1, wherein: The wheel pipe part (7) is an open-ended pipe mouth handle structure, and the hinging amplitude of the wheel pipe part (7) is matched with the rotation angle of the rotating shaft bearing (11).
6. The inspection device for operation and maintenance pipelines of a nuclear power plant according to claim 5, characterized in that: The rotation angle amplitude of the rotating shaft bearing (11) is less than 60 degrees.
7. A nuclear power plant operation and maintenance pipeline detection device according to claim 1, characterized in that: A cylinder shaft (12) is embedded in the rotating wheel crank (3), and a cam is axially connected between the cylinder shaft (12) and the rotating shaft bearing (11).
8. The inspection device for operation and maintenance pipelines of a nuclear power plant according to claim 1, characterized in that: A gasket ring (13) is fixedly attached to the inner surface of the pipe base (1).