A steam generator sealing baffle plate testing device and testing system

Abstract

This invention provides a testing device and system for a steam generator sealing plug plate. The testing device includes a test bench, an adjusting seat, a pressurizing chamber, an angle adjusting mechanism, and a pressurizing assembly. The adjusting seat is rotatably mounted on the test bench, and the pressurizing chamber is fixedly mounted on the adjusting seat. The pressurizing chamber includes a pressurizing cavity and an opening. The sealing plug plate is detachably connected to the pressurizing chamber and seals the opening. The angle adjusting mechanism is mounted on the test bench and connected to the adjusting seat to drive the adjusting seat to rotate relative to the test bench. The pressurizing assembly connects to the pressurizing cavity to inject a pressurizing medium into the pressurizing cavity. This testing device can realistically simulate the actual installation conditions of the sealing plug plate in different steam generator water chambers during testing, overcoming the problem of insufficient test coverage caused by the inability of existing testing devices to simulate different installation angles, thereby providing a more reliable guarantee for the safe operation and regular maintenance of nuclear power units.

Description

Technical Field

[0001] This invention relates to the field of sealing plate testing technology, and in particular to a steam generator sealing plate testing device and testing system. Background Technology

[0002] The safe operation of a nuclear power plant is highly dependent on the integrity and reliability of its primary loop pressure boundary. As a key piece of equipment connecting the primary and secondary loops, the safety of the steam generator is particularly crucial. During refueling overhauls of nuclear power plants, maintenance is typically required inside the primary side water chamber of the steam generator. To prevent foreign objects from falling into the primary loop main piping during maintenance, or to prevent high-pressure water from the primary loop from flooding the maintenance work area under reactor filling conditions, a dedicated sealing plate must be installed on the sealing ring seat at the inlet of the primary side water chamber. Under "high water level sealing conditions," this sealing plate directly constitutes part of the primary loop pressure boundary, and its sealing performance and structural strength are critical to maintaining the integrity of the primary loop. If the sealing plate fails to seal or its structural strength is insufficient, it may cause coolant leakage, leading to unplanned shutdowns, maintenance delays, and even nuclear safety-related risks. However, existing sealing plate testing devices cannot simulate different installation conditions of the sealing plate in the steam generator water chamber, resulting in insufficient simulation test coverage and thus posing potential risks to the safe operation and regular maintenance of nuclear power units. Summary of the Invention

[0003] This invention provides a steam generator sealing plate testing device and system to improve the technical problem that existing testing devices are unable to simulate the actual installation conditions of the sealing plate on the steam generator.

[0004] The first aspect of this invention provides a steam generator sealing plate testing device, the testing device comprising a frame, an adjusting seat, a pressurizing chamber, an angle adjusting mechanism, and a pressurizing assembly. The adjusting seat is rotatably mounted on the frame, and the pressurizing chamber is fixedly mounted on the adjusting seat. The pressurizing chamber includes a pressurizing chamber and an opening, and the sealing plate is detachably connected to the pressurizing chamber and seals the opening. The angle adjusting mechanism is mounted on the frame and connected to the adjusting seat to drive the adjusting seat to rotate relative to the frame. The pressurizing assembly communicates with the pressurizing chamber to inject a pressurizing medium into the pressurizing chamber.

[0005] In one embodiment of the present invention, the angle adjustment mechanism includes a first connecting seat, a second connecting seat, and an adjusting rod. The first connecting seat is hinged to the platform, the second connecting seat is hinged to the adjusting seat, the adjusting rod is rotatably connected to the first connecting seat, and the adjusting rod is threadedly connected to the second connecting seat.

[0006] In one embodiment of the present invention, the testing device further includes a vibration meter, which includes a first laser probe and a second laser probe. The first laser probe and the second laser probe are respectively disposed on the side of the sealing plate away from the opening, and the optical axes of the first laser probe and the second laser probe are respectively perpendicular to the cross-section of the opening.

[0007] In one embodiment of the present invention, the optical axis of the first laser probe is perpendicular to the central region of the cross-section of the opening, and the optical axis of the second laser probe is perpendicular to the outer peripheral region of the cross-section of the opening.

[0008] In one embodiment of the present invention, the pressurizing chamber includes a water inlet, a drain outlet, and an exhaust outlet respectively connected to the pressurizing chamber. The pressurizing component is connected to the water inlet, and shut-off valves are respectively provided at the water inlet, the drain outlet, and the exhaust outlet outside the pressurizing chamber.

[0009] In one embodiment of the present invention, the pressurizing component includes a pressurizing water pump and a hydraulic control valve. The pressurizing water pump is connected to the water inlet through a pipeline, and a hydraulic control valve is provided on the pipeline connecting the pressurizing water pump and the water inlet.

[0010] In one embodiment of the present invention, the shut-off valve includes a first shut-off valve, a second shut-off valve, and a third shut-off valve. The first shut-off valve is disposed on the connecting pipe between the pressurizing component and the water inlet; the second shut-off valve is disposed on the connecting pipe at the drain outlet; and the third shut-off valve is disposed on the connecting pipe at the vent outlet.

[0011] In one embodiment of the present invention, the testing device further includes a pressure sensor, which is installed in the pressurized cavity and connected to the pressurized cavity.

[0012] In one embodiment of the present invention, the testing device further includes a flange interface adapted to the sealing plate, the flange interface being detachably installed at the opening.

[0013] In one embodiment of the present invention, the flange interface includes a first flange interface and a second flange interface, wherein the first flange interface is detachably connected to the pressurized cavity, and the first flange interface is detachably connected to the second flange interface.

[0014] In one embodiment of the present invention, the testing device further includes a sealing ring disposed between the first flange interface and the second flange interface, and / or, the sealing ring is disposed between the first flange interface and the pressurized cavity.

[0015] In one embodiment of the present invention, the testing device further includes a plurality of rollers, which are respectively fixedly installed on the bottom of the platform to drive the platform to move.

[0016] A second aspect of the present invention also provides a steam generator sealing plate testing system, the testing system comprising a gas supply component and the testing device described in any of the above claims, wherein the gas supply component is connected to the inflatable sealing structure of the sealing plate and is used to inject pressurized gas into the sealing plate.

[0017] In one embodiment of the present invention, the gas supply component includes a gas source and a pressure regulating valve, the gas source pipeline is connected to the inflatable sealing structure, and the pressure regulating valve is disposed on the connecting pipeline between the gas source and the inflatable sealing structure.

[0018] This invention provides a testing device and system for a steam generator sealing plate. The testing device features an adjustable base rotatably mounted on a test bench. Driven by an angle adjustment mechanism, the rotation angle of the adjustable base relative to the test bench is adjusted, thereby changing the orientation angle of the pressurized chamber opening. This allows the installation angle of the sealing plate on the testing device to accurately simulate the angle of the sealing plate after installation on an actual steam generator, thus realistically simulating the actual installation conditions of the sealing plate in different steam generator water chambers during testing. This testing device overcomes the problem of insufficient test coverage caused by the inability of existing testing devices to simulate different installation angles. It effectively verifies the sealing performance and structural strength of the sealing plate at different tilt angles, reducing test result distortion caused by inconsistencies between test conditions and actual field conditions, thereby providing a more reliable guarantee for the safe operation and regular maintenance of nuclear power units. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] In the attached diagram: Figure 1 This is a schematic diagram of the testing device structure provided in an embodiment of the present invention; Figure 2 This is a front view of the test device structure provided in an embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of the AA-direction cross-section structure; Figure 4This is a side view of the structure of a testing device provided in an embodiment of the present invention; Figure 5 This is a top view of the test device structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the installation of the testing device and sealing plate provided in an embodiment of the present invention; Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of region A; Figure 8 This is a schematic diagram of a test system provided in an embodiment of the present invention.

[0021] The attached figures are labeled as follows: 10. Testing device; 20. Sealing plate; 21. Inflatable sealing structure; 22. Dry airbag; 23. Wet airbag; 24. Middle cavity; 25. Dry cavity; 26. Wet cavity; 100. Stand; 110. Roller; 120. Support leg; 200. Adjustment seat; 300. Pressurized chamber; 310. Pressurized chamber; 320. Opening; 330. Water inlet; 340. Drain outlet; 350. Exhaust outlet; 360. Shut-off valve; 361. First shut-off valve; 362. Second shut-off valve; 363. Third shut-off valve; 400. Angle adjustment mechanism; 410. 420. First connecting seat; 430. Adjusting rod; 440. Bearing seat; 450. Adjusting nut; 500. Pressurizing assembly; 510. Pressurizing water pump; 520. Hydraulic control valve; 600. Vibration meter; 610. First laser probe; 620. Second laser probe; 700. Pressure sensor; 800. Flange interface; 810. First flange interface; 820. Second flange interface; 830. Sealing ring; 900. Air supply assembly; 910. Air source; 920. Air pressure control valve; 930. Air pressure shut-off valve; 940. Air pressure sensor. Detailed Implementation

[0022] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0025] Please see Figures 1 to 7 This invention provides a testing device and system for testing steam generator sealing plates. The testing device can accurately simulate the angle of the sealing plate after installation on an actual steam generator, thereby improving the accuracy of testing the sealing performance and structural strength of the sealing plate at different tilt angles. Therefore, it can overcome the technical problem that existing testing devices are unable to simulate the installation conditions of sealing plates on steam generators.

[0026] Please see Figures 1 to 8 The first aspect of this invention provides a steam generator sealing plug plate testing device 10. This testing device 10 is used to simulate the actual installation conditions of the sealing plug plate 20 after it is installed on the steam generator, thereby improving the accuracy of sealing performance and structural strength testing of the sealing plug plate 20 at different tilt angles. The sealing plug plate 20 can be any of the following: a pneumatic pressure-bearing plug plate, a gasket sealing plug plate, or other blind hole plates that meet the usage requirements. In this embodiment, the sealing plug plate 20 is taken as a pneumatic pressure-bearing plug plate. It should be noted that the specific structure and sealing principle of the pneumatic pressure-bearing plug plate are well known in the industry and have wide applications in the nuclear power field, and can be obtained through general commercial means.

[0027] The testing device 10 includes a frame 100, an adjustment base 200, a pressurizing chamber 300, an angle adjustment mechanism 400, and a pressurizing assembly 500. The frame 100 serves as the supporting foundation for the entire device, providing an installation platform for other components. The frame 100 can be a welded frame structure or a box-type structure, but is not limited to these.

[0028] The adjusting seat 200 is rotatably mounted on the platform 100, and the pressurizing chamber 300 is fixedly mounted on the adjusting seat 200 and rotates synchronously with the adjusting seat 200. Specifically, the adjusting seat 200 is located on the upper part of the platform 100. The adjusting seat 200 can be connected to the platform 100 through rotating connecting parts such as a rotating shaft, hinge, or bearing, so that the adjusting seat 200 can rotate relative to the platform 100 about a horizontal axis. The fixed connection method between the adjusting seat 200 and the pressurizing chamber 300 is not limited. It can be any one or more of the following fixed connection methods: welded integral fixing, snap-fit ​​connection, clamp connection, bolt connection, etc., but is not limited to these, as long as a stable connection between the adjusting seat 200 and the pressurizing chamber 300 can be achieved.

[0029] The pressurized chamber 300 includes a pressurized chamber 310 and an opening 320. A sealing plate 20 is detachably connected to the pressurized chamber 300 and seals the opening 320. Specifically, the pressurized chamber 300 simulates the piping or chamber structure corresponding to the installation position of the sealing plate 20 in a steam generator. The opening 320 simulates the sealing port between the steam generator and the sealing plate 20. A pressurized medium is introduced into the pressurized chamber 300. It should be noted that the pressurized medium can be water or other liquid media suitable for the simulation experiment. The detachable connection method between the sealing plate 20 and the pressurized chamber 300 is not limited; it can be any suitable connection method such as bolt connection or clamp connection. For example, in one embodiment, the opening 320 of the pressurized chamber 300 is designed with an integrated flange interface adapted to the sealing connection of the sealing plate 20. In other embodiments, the sealing plate 20 can also be sealed to the sealing plate 20 at the opening 320 via a separate flange interface to seal and cover the opening 320 and the pressurized chamber 310. It should be noted that whether the flange interface is integrally formed with the pressurized chamber 300 or is a separate flange interface, its structural form simulates the interface structure of the sealing plate 20 under actual installation conditions in the steam generator, thereby further improving the accuracy of the simulation test results.

[0030] Please see Figure 3 An angle adjustment mechanism 400 is mounted on the stand 100 and connected to an adjustment seat 200 to drive the adjustment seat 200 to rotate relative to the stand 100, thereby adjusting the orientation angle of the opening 320 of the pressurized chamber 300. For example, the water chamber of the steam generator in different units may have different tilt angles such as 0°, 5°, and 10°. The specific structure of the angle adjustment mechanism 400 is not limited; it can be a manual adjustment mechanism, such as a ball screw mechanism, worm gear mechanism, or rack and pinion mechanism, driven by the operator via a handwheel or handle. The angle adjustment mechanism 400 can also be an electric adjustment mechanism, such as an electric push rod or servo motor, to achieve angle adjustment. The pressurization assembly 500 is connected to the pressurization chamber 310 to inject a pressurizing medium into the pressurization chamber 310. The pressurizing medium is usually water; by injecting water into the pressurization chamber 310, the high-pressure water environment of the primary loop of a nuclear power plant is simulated. The type of pressurization assembly 500 is not limited; it can be any suitable type of equipment or system that can be used to inject pressurization medium into pressurization chamber 310 and provide stable medium pressure.

[0031] The testing device of this invention features an adjustable seat 200 rotatably mounted on a test bench 100. Driven by an angle adjustment mechanism 400, the adjustment seat 200's rotation angle relative to the test bench 100 is adjusted, thereby changing the orientation angle of the opening 320 of the pressurized chamber 300. This allows the sealing plate 20, after installation and sealing of the opening 320, to accurately simulate the installation angle of the sealing plate 20 in an actual steam generator. This enables a realistic simulation of the actual installation conditions of the sealing plate 20 in different steam generator water chambers during testing. The testing device 10 effectively verifies the sealing performance and structural strength of the sealing plate 20 at different tilt angles, reducing test result distortion caused by inconsistencies between test conditions and actual field conditions. This provides a more reliable guarantee for the safe operation and regular maintenance of nuclear power units.

[0032] Please see Figure 3 In one embodiment of the present invention, the angle adjustment mechanism 400 adopts a lead screw and nut mechanism. The angle adjustment mechanism 400 includes a first connecting seat 410, a second connecting seat 420, and an adjusting rod 430. The first connecting seat 410 is hinged to the frame 100. Specifically, the first connecting seat 410 is rotatably mounted on the upper part of the frame 100 via two sets of bearing seats 440 and rotates relative to the frame 100 about a horizontal axis. The adjusting rod 430 is rotatably connected to the first connecting seat 410. Specifically, one end of the adjusting rod 430 is rotatably mounted to the first connecting seat 410 and rotates relative to the first connecting seat 410 about the axis of the adjusting rod 430. The second connecting seat 420 is hinged to the adjusting seat 200, and an adjusting nut 450 adapted to the adjusting rod 430 is fixed on the second connecting seat 420. The adjusting rod 430 is threadedly connected to the adjusting nut 450 on the second connecting seat 420. The operator can rotate the adjusting rod 430 to adjust the relative position of the second connecting seat 420 on the adjusting rod 430, thereby driving the adjusting seat 200 to pitch and rotate relative to the platform 100 and provide support.

[0033] Please see Figure 1 and Figure 3To accurately measure the deformation of the sealing plate 20 under water pressure, in one embodiment of the present invention, the testing device 10 further includes a vibration meter 600. The vibration meter 600 can be a laser Doppler vibration meter, employing a non-contact measurement method to avoid interference with the sealing plate structure and achieve high-precision measurement. It should be noted that laser Doppler vibration meters are commercially available. Specifically, the vibration meter 600 includes at least a first laser probe 610 and a second laser probe 620. The first laser probe 610 and the second laser probe 620 are respectively disposed on the side of the sealing plate 20 opposite to the opening 320. For example, the first laser probe 610 can be mounted on the outside of the sealing plate 20 using an adjustable-angle bracket (not shown in the figure), which is fixedly mounted on the platform 100. Similarly, the second laser probe 620 can also be mounted on the outside of the sealing plate 20 using an adjustable-angle bracket. Furthermore, the optical axes of the first laser probe 610 and the second laser probe 620 are perpendicular to the cross-section of the opening 320. In other embodiments, the first laser probe 610 and the second laser probe 620 can also be placed on the side of the stand 100 by separate support structures, as long as the optical axis of the laser probe is perpendicular to the surface of the sealing plate 20, high-precision non-contact deformation and vibration measurement can be achieved.

[0034] Furthermore, in one embodiment of the present invention, the optical axis of the first laser probe 610 is perpendicular to the central region of the cross-section of the opening 320, enabling the first laser probe 610 to detect the relative vibration and deformation of the central region of the sealing plate 20. The optical axis of the second laser probe 620 is perpendicular to the outer periphery of the cross-section of the opening 320, enabling the second laser probe 620 to detect the relative vibration and deformation of the edge region of the sealing plate 20, thus overcoming the limitations of single-point measurement. It should be noted that, taking the sealing plate 20 as a circle as an example, the central region perpendicular to the cross-section of the opening 320 refers to a circular region within the cross-section with its center as the center and a radius not exceeding 1 / 3 of the cross-sectional radius; the outer periphery refers to an annular region within the cross-section with a radius greater than 2 / 3 of the cross-sectional radius but not exceeding the cross-sectional radius. Please see Figure 3 , Figure 5 and Figure 8 In one embodiment of the present invention, the pressurization chamber 300 includes a water inlet 330, a drain outlet 340, and an exhaust outlet 350, which are respectively connected to the pressurization chamber 310. The pressurization assembly 500 is connected to the water inlet 330 and is used to inject a pressurizing medium, typically water, into the pressurization chamber 310 to simulate the high-pressure water environment of the primary loop of a nuclear power plant. Shut-off valves 360 are respectively installed at the water inlet 330, drain outlet 340, and exhaust outlet 350 located outside the pressurization chamber 300.

[0035] Specifically, in one embodiment of the present invention, the shut-off valve 360 ​​includes a first shut-off valve 361, a second shut-off valve 362, and a third shut-off valve 363. The first shut-off valve 361 is disposed on the connecting pipeline between the pressurizing assembly 500 and the water inlet 330, i.e., on the water inlet pipeline between the pressurizing chamber 310 and the pressurizing assembly 500, and is used to control the opening and closing of the water inlet pipeline. The drain outlet 340 can be disposed at the bottom or lowest point of the pressurizing chamber 300, and the second shut-off valve 362 is disposed on the drain pipeline at the drain outlet 340, and is used to control the opening and closing of the drain. After the test, opening the second shut-off valve 362 will drain the water from the pressurizing chamber 310. To ensure test accuracy, gas residue should be avoided in the pressurizing chamber 310. Therefore, an exhaust port 350 is provided on the top side or high point of the pressurizing chamber 300, and the third shut-off valve 363 is installed at the exhaust port 350. In the initial stage of injecting water into the pressurized chamber 310, the third shut-off valve 363 is opened. As water is injected, the air in the pressurized chamber 310 is squeezed upward and discharged from the exhaust port 350. The operator can observe the outflow from the exhaust port 350. When a continuous water flow is observed without air bubbles, it indicates that the air in the pressurized chamber 310 has been basically expelled. Then, the third shut-off valve 363 is closed, filling the pressurized chamber 310 with pure water, thereby making the pressure transmission to the sealing plate 20 more realistic and stable.

[0036] Please see Figure 8 In one embodiment of the present invention, the pressurizing assembly 500 includes at least a pressurizing water pump 510 and a hydraulic control valve 520. The inlet of the pressurizing water pump 510 is connected to a water source (such as a water tank) via a pipeline, and the outlet of the pressurizing water pump 510 is connected to a water inlet 330 via a pipeline. A hydraulic control valve 520 and a first shut-off valve 361 are sequentially installed on the connecting pipeline between the pressurizing water pump 510 and the water inlet 330. The hydraulic control valve 520 is a pressure regulating valve used to adjust the water pressure injected into the pressurizing chamber 310, ensuring that the water pressure in the pressurizing chamber 310 accurately reaches a predetermined test value and remains stable. The first shut-off valve 361 is located between the hydraulic control valve 520 and the pressurizing chamber 310. It is used to close after the pressure in the pressurizing chamber 310 reaches a predetermined value, cutting off the water injection pipeline to the pressurizing chamber 310, and cooperating with other shut-off valves 360 to allow the pressurizing chamber 310 to enter a pressure-holding state. During the pressure holding period, even if the pressurizing water pump 510 stops working or there is a slight leak in the pressure regulating valve, it will not affect the pressure in the pressurizing chamber 310, ensuring the accuracy of the pressure holding test.

[0037] Please see Figure 8In one embodiment of the present invention, the testing device 10 further includes a pressure sensor 700, which is installed in the pressurizing chamber 300 and connected to the pressurizing chamber 310. The pressure sensor 700 can directly monitor the pressure state inside the pressurizing chamber 310. By accurately measuring the actual pressure inside the pressurizing chamber 310, measurement errors caused by pipeline pressure loss, valve throttling, or medium flow are avoided, ensuring the accuracy and reliability of the pressure data inside the pressurizing chamber 310.

[0038] Please see Figure 3 and Figure 4 In one embodiment of the present invention, the testing device 10 further includes a flange interface 800 adapted to the sealing plug plate 20. The flange interface 800 is detachably installed at the opening 320. The flange interface 800 is used to simulate the actual flange interface on the primary side of a nuclear power plant steam generator. Its structure, size, and sealing surface form are consistent with the flange interface under actual no-load conditions. The flange interface 800 can be a flange interface located at the opening 320 of the pressurized cavity 300 and integrated with the pressurized cavity 300, or it can be an independent flange interface installed at the opening 320 in a detachable manner. That is, the flange interface 800 serves as an extension of the pressurized cavity 300 at the opening 320 and is detachably connected to the pressurized cavity 300. The sealing plug plate 20 is detachably connected to the flange interface 800, thereby achieving intermittent sealing of the opening 320.

[0039] Please see Figure 3 and Figure 4 In one embodiment of the present invention, the flange interface 800 includes a first flange interface 810 and a second flange interface 820. The first flange interface 810 is detachably connected to the pressurization chamber 300, and the second flange interface 820 is detachably connected to the first flange interface 810. Specifically, in this embodiment, to adapt to the sealing plate 20 of different reactor types, for example, when it is necessary to test the sealing plate of the Hualong One reactor type (3rd generation pressurized water reactor), the structure of the first flange interface 810 is adapted to the structure of the sealing plate 20 of the 3rd generation pressurized water reactor. The first flange interface 810 is fixedly connected to the opening 320 of the pressurization chamber 300 by bolts. In order to ensure the sealing performance, a sealing ring is provided between the first flange interface 810 and the pressurization chamber 300 to ensure the connection sealing performance. At the same time, the sealing plate 20 of the 3rd generation pressurized water reactor is installed on the side of the first flange interface 810 away from the opening 320 by bolts, thereby indirectly achieving the sealing of the opening 320.

[0040] Furthermore, for example, when testing the sealing plug 20 of the CPR1000 reactor type (2.5 generation pressurized water reactor), the fixed connection between the first flange interface 810 and the pressurization chamber 300 remains unchanged. A detachable connection between the first flange interface 810 and the second flange interface 820 is achieved by providing bolt holes on the first flange interface 810 that are adapted for connection with the second flange interface 820. Furthermore, the sealing plug 20 of the 2.5 generation pressurized water reactor is installed on the side of the second flange interface 820 facing away from the first flange interface 810 to ensure a tight seal. It should be noted that the actual structure of the first flange interface 810 is used to simulate the interface structure of the sealing plug 20 of the 3rd generation pressurized water reactor under actual operating conditions, while the structural design of the second flange interface 820 is used to simulate the interface structure of the sealing plug 20 of the 2.5 generation pressurized water reactor under actual installation conditions. The detachable connection between the first flange interface 810 and the second flange interface 820 enables the testing device to adapt to the testing of dual-stack type sealing plugs, reducing equipment cost and operational complexity.

[0041] Furthermore, in one embodiment of the present invention, to ensure sealing performance, the testing device further includes a sealing ring 830, and the number of sealing rings 830 can be multiple. The sealing ring 830 can be disposed at the mounting mating surface between the first flange interface 810 and the second flange interface 820, or it can be disposed at the mounting mating surface between the first flange interface 810 and the pressure chamber 300, thereby selectively installing it according to the actual sealing requirements.

[0042] In one embodiment of the present invention, for ease of movement and transport, a plurality of rollers 110 may be installed on the bottom of the test stand 100. The rollers 100 are respectively fixedly installed on the bottom of the test stand 100 to drive the test stand 100 to move, thereby driving the entire testing device to move. For example, in one embodiment, the rollers 110 may be casters with brake mechanisms to fix the position of the testing device 10 during testing. In other embodiments, the rollers 110 may be casters without brake functions. Adjustable support legs 120 are provided at the bottom of the test stand 100 to adjust its height, thereby fixing the position of the testing device 10.

[0043] Please see Figures 6 to 8A second aspect of the present invention also provides a steam generator sealing plate testing system. This testing system includes a gas supply assembly 900 and a testing device 10 as described in any of the above embodiments. The gas supply assembly 900 is connected to the inflatable sealing structure 21 of the sealing plate 20 and is used to inject pressurized gas into the sealing plate 20. The pressurized gas can be air or other gases that can meet actual inflation requirements. The sealing plate 20 is an airbag-type pressure-bearing plate. The inflatable sealing structure 21 of the sealing plate 20 typically includes a dry airbag 22, a wet airbag 23, and a central cavity 24, used to establish an active seal before testing.

[0044] Please see Figure 7 and Figure 8 In one embodiment of the present invention, the air supply assembly 900 includes at least an air source 910 and at least three independent air supply lines. The three independent air supply lines are respectively used to connect the dry airbag 22, the wet airbag 23, and the central cavity 24 of the sealing plate 20. Each air supply line is equipped with a pressure regulating valve 920, a pressure shut-off valve 930, and a pressure sensor 940. The air source 910 can be connected to the inflatable sealing structure 21 through multiple lines to inject pressurized gas (such as compressed air) into the sealing plate 20 to activate the inflatable sealing structure 21, that is, to activate one or more of the dry airbag 22, the wet airbag 23, and the central cavity 24. The pressure regulating valve 920 is used to precisely regulate the gas pressure output to each set of air supply lines to meet the different pressure requirements of the dry cavity 25, the wet cavity 26, and the central cavity 24 respectively. It should be noted that the dry chamber 25 refers to the annular sealed space formed between the dry airbag 22 after inflation and the inner wall of the flange interface 800. The wet chamber 26 refers to the annular sealed space formed between the wet airbag 23 after inflation and the inner wall of the flange interface 800, which directly bears the water pressure impact from the pressurized chamber 310. The intermediate chamber 24 refers to the annular sealed space between the dry airbag 22 and the wet airbag 23, which is jointly enclosed by the dry airbag 22, the wet airbag 23, and the inner wall of the flange interface 800. The pressure shut-off valve 930 is used to control the flow of gas in the pipeline, and the pressure sensor 940 is installed on the sealed pipeline after the pressure shut-off valve 930 to monitor the actual gas supply pressure in real time.

[0045] This invention proposes a testing device and system for a steam generator sealing plate. The testing device features an adjustable base rotatably mounted on a test bench. Driven by an angle adjustment mechanism, the rotation angle of the adjustable base relative to the test bench is adjusted, thereby changing the orientation angle of the pressurized chamber opening. This allows the installation angle of the sealing plate on the testing device to accurately simulate the installation angle of the sealing plate in an actual steam generator after the sealing plate is installed and seals the opening. This enables a realistic simulation of the actual installation conditions of the sealing plate in different steam generator water chambers during testing. This testing device overcomes the problem of insufficient test coverage caused by the inability of existing testing devices to simulate different installation angles. It effectively verifies the sealing performance and structural strength of the sealing plate at different tilt angles, reducing test result distortion caused by inconsistencies between test conditions and actual field conditions. This provides a more reliable guarantee for the safe operation and regular maintenance of nuclear power units, thus addressing the technical problem of existing testing devices' inability to simulate the actual installation conditions of sealing plates on steam generators.

[0046] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A testing device for a steam generator sealing plate, characterized in that, include: stand; An adjustable seat is rotatably mounted on the platform. A pressurizing chamber is fixedly installed on the adjusting seat, and the pressurizing chamber includes a pressurizing chamber and an opening; The sealing plate is detachably connected to the pressurized chamber and seals the opening. An angle adjustment mechanism is installed on the platform, and the angle adjustment mechanism is connected to the adjustment seat to drive the adjustment seat to rotate relative to the platform; A pressurization assembly is connected to the pressurization chamber to inject a pressurization medium into the pressurization chamber.

2. The testing apparatus according to claim 1, characterized in that, The angle adjustment mechanism includes a first connecting seat, a second connecting seat, and an adjusting rod. The first connecting seat is hinged to the frame, the second connecting seat is hinged to the adjusting seat, the adjusting rod is rotatably connected to the first connecting seat, and the adjusting rod is threadedly connected to the second connecting seat.

3. The testing apparatus according to claim 1, characterized in that, The testing device also includes a vibration meter, which includes a first laser probe and a second laser probe. The first laser probe and the second laser probe are respectively disposed on the side of the sealing plate away from the opening, and the optical axes of the first laser probe and the second laser probe are respectively perpendicular to the cross-section of the opening.

4. The testing apparatus according to claim 3, characterized in that, The optical axis of the first laser probe is perpendicular to the central region of the cross-section of the opening, and the optical axis of the second laser probe is perpendicular to the outer peripheral region of the cross-section of the opening.

5. The testing apparatus according to claim 1, characterized in that, The pressurizing chamber includes a water inlet, a drain outlet, and an exhaust outlet that are respectively connected to the pressurizing chamber. The pressurizing assembly is connected to the water inlet, and shut-off valves are respectively installed at the water inlet, the drain outlet, and the exhaust outlet outside the pressurizing chamber.

6. The testing apparatus according to claim 5, characterized in that, The pressurization assembly includes a pressurization water pump and a hydraulic control valve. The pressurization water pump is connected to the water inlet through a pipeline, and a hydraulic control valve is installed on the pipeline connecting the pressurization water pump and the water inlet.

7. The testing apparatus according to claim 5, characterized in that, The shut-off valve includes a first shut-off valve, a second shut-off valve, and a third shut-off valve. The first shut-off valve is located on the connecting pipe between the pressurizing component and the water inlet; the second shut-off valve is located on the connecting pipe at the drain outlet; and the third shut-off valve is located on the connecting pipe at the vent outlet.

8. The testing apparatus according to claim 1, characterized in that, The testing device also includes a pressure sensor, which is installed in the pressurized chamber and connected to the pressurized chamber.

9. The testing apparatus according to claim 1, characterized in that, The testing device also includes a flange interface adapted to the sealing plate, the flange interface being detachably installed at the opening.

10. The testing apparatus according to claim 9, characterized in that, The flange interface includes a first flange interface and a second flange interface. The first flange interface is detachably connected to the pressurized cavity, and the first flange interface is detachably connected to the second flange interface.

11. The testing apparatus according to claim 10, characterized in that, The testing device further includes a sealing ring disposed between the first flange interface and the second flange interface, and / or, the sealing ring disposed between the first flange interface and the pressurized chamber.

12. The testing apparatus according to claim 1, characterized in that, The testing device also includes multiple rollers, which are fixedly installed on the bottom of the platform to drive the platform to move.

13. A steam generator sealing plate testing system, characterized in that, The device includes a gas supply assembly and a testing apparatus according to any one of claims 1 to 12, wherein the gas supply assembly is connected to the inflatable sealing structure of the sealing plate for injecting pressurized gas into the sealing plate.

14. The testing system according to claim 13, characterized in that, The gas supply assembly includes a gas source and a pressure regulating valve. The gas source pipeline is connected to the inflatable sealing structure, and the pressure regulating valve is located on the connecting pipeline between the gas source and the inflatable sealing structure.

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