A simulation test device for repairing bolt holes in reactor pressure vessels

Abstract

This utility model discloses a simulation test device for repairing threaded holes in reactor pressure vessels, comprising: a panel with at least three through holes; a support assembly fixedly connected to the panel to support it; at least three threaded hole simulators, each of which is mounted on a through hole and detachably connected to the panel; each threaded hole simulator has an internal threaded hole, an opening at the top for a cutting tool to enter, and a viewing window in the middle and lower part for observing the internal condition. This utility model, by detachably connecting the threaded hole simulators to the panel, allows the at least three threaded hole simulators to be interchanged, improving the service life of the simulation test device and thus enhancing the efficiency and accuracy of simulation debugging. The viewing window in the threaded hole simulator allows for observation of the thread processing process, increasing the practicality and functionality of the simulation test device.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power equipment maintenance technology, and in particular to a simulation test device for repairing the threaded holes of reactor pressure vessels. Background Technology

[0002] Repairing defects in the main bolt holes is crucial during the installation and maintenance of nuclear power plant reactor pressure vessels. Traditional simulator designs typically machine the bolt holes onto a single metal component, which not only increases the simulator's weight but also renders the simulator unusable after multiple machining operations of the bolt holes. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a simulation test device for repairing the threaded holes of reactor pressure vessels.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a simulation test device for repairing the threaded holes of reactor pressure vessels, comprising:

[0005] The panel has at least three through holes;

[0006] A support component is fixedly connected to the panel to support the panel;

[0007] At least three screw hole emulators, each of which is mounted on the through hole and detachably connected to the panel;

[0008] The screw hole simulator has an internal threaded hole, an opening at the top for a cutting tool to enter, and a viewing window in the middle and lower part to observe the internal situation.

[0009] In some embodiments, the screw hole simulator includes a bolt hole sleeve and a fixed cylinder. The bolt hole sleeve is fixedly connected to the fixed cylinder. The diameter of the bolt hole sleeve is larger than the diameter of the through hole and is detachably connected to the panel. The diameter of the fixed cylinder is smaller than the diameter of the through hole so that it can pass through the through hole. The fixed cylinder has internal threads, an opening at the top, and a viewing window at the middle and lower parts.

[0010] In some embodiments, the bolt hole sleeve is detachably connected to the panel by a plurality of countersunk screws.

[0011] In some embodiments, the front view of the window is square.

[0012] In some embodiments, the length of the window is less than or equal to the diameter of the fixed cylinder.

[0013] In some embodiments, the height of the viewing window is 1 / 6 to 1 / 3 of the height of the fixed cylinder.

[0014] In some embodiments, the support assembly includes at least two support frames and at least two connecting flanges, with the two support frames respectively disposed on both sides of the three through holes and connected to the panel through the connecting flanges.

[0015] In some embodiments, the support frame includes a crossbeam, an upright, a diagonal brace, and at least two legs. The two ends of the upright are fixedly connected to the crossbeam and the connecting flange, respectively. The two ends of the diagonal brace are fixedly connected to the crossbeam and the upright, respectively. The two legs are installed at intervals at the bottom of the crossbeam.

[0016] In some embodiments, the internal threaded hole has a size of M170*6.

[0017] In some embodiments, the panel is a flange sealing surface, fan-shaped, with a radial thickness of 430mm-450mm.

[0018] By implementing this utility model, the following beneficial effects can be achieved:

[0019] This utility model discloses a simulation test device for repairing threaded holes in reactor pressure vessels, comprising: a panel with at least three through holes; a support assembly fixedly connected to the panel to support it; and at least three threaded hole simulators, each of which is mounted on a through hole and detachably connected to the panel. Each threaded hole simulator has an internal threaded hole, an opening at the top for a cutting tool to enter, and a viewing window in the lower middle section for observing the internal condition. The detachable connection between the threaded hole simulators and the panel allows for interchangeability of the at least three simulators, extending their service life and improving the efficiency and accuracy of simulation debugging. The viewing window within the threaded hole simulator allows for observation of the thread processing process, increasing the simulator's practicality and functionality. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0021] Figure 1 This is a front view schematic diagram of a simulation test device for repairing the bolt holes of a reactor pressure vessel, according to one embodiment of the present invention.

[0022] Figure 2 yes Figure 1 A rear view schematic diagram of a simulation test device for repairing the bolt holes of reactor pressure vessels;

[0023] Figure 3 yes Figure 1 A schematic diagram of the panel structure;

[0024] Figure 4 yes Figure 1A schematic diagram of the structure of the screw hole simulator;

[0025] Figure 5 yes Figure 1 A schematic diagram of the supporting components. Detailed Implementation

[0026] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] See Figures 1 to 5This utility model discloses a simulation test device for repairing the threaded holes of a reactor pressure vessel, comprising a panel 1, a support assembly 2, and at least three threaded hole simulators 3. The panel 1 has at least three through holes 11 arranged in a row along the circumference, each through hole 11 penetrating the panel 1. The panel 1 is used to simulate the flange sealing surface of a nuclear power plant reactor pressure vessel. The support assembly 2 is fixedly connected to the panel 1 to support the panel 1, and the panel 1 is suspended by the support assembly 2. The support assembly 2 is located on the outer side of the panel 1, with at least three threaded hole simulators 3 cleared from the middle. Each threaded hole simulator 3 is mounted on the through hole 11 and detachably connected to the panel 1, suspended on the panel 1. The threaded hole simulator 3 has an internal threaded hole 31, an opening 32 at the top for a tool to enter, and a viewing window 33 in the lower middle part for observing the internal condition. The threaded hole simulator 3 is used to simulate the main threaded hole of a nuclear power plant reactor pressure vessel. All components of the simulation test device can be manufactured using stainless steel and have undergone surface pickling and passivation. The window 33 can be a window on the screw hole simulator 3, or it can be made of a visible material.

[0031] This utility model discloses a simulation test device for repairing threaded holes in reactor pressure vessels, used for equipment commissioning and testing. The three threaded hole simulators 3 can be arbitrarily combined with at least three through holes 11, their positions interchangeable. This interchangeable design improves the service life of the simulation test device, reduces weight, and simplifies installation and handling, thereby improving the efficiency and accuracy of simulation commissioning. Multiple spare threaded hole simulators 3 can be provided according to actual usage needs, facilitating equipment commissioning and testing. Furthermore, the viewing window 33 can be used to observe the thread processing process, increasing the practicality and functionality of the simulation test device.

[0032] Generally, at least three screw hole simulators 3 are arranged in a simulation group, with the middle one and the two side ones forming a simulation group. The middle screw hole simulator 3 is used for tool repair testing, while the side screw hole simulators 3 are used for tool positioning. Understandably, when the middle screw hole simulator 3 fails, it can be swapped with either of the side simulators to form a new simulation group for repair testing, thus extending the lifespan of the simulation testing device. Compared to the integrated structure of existing technologies, the lifespan of the simulation testing device of this invention is three times or more that of the integrated structure simulator. Furthermore, the three screw hole simulators 3 can be interchanged in different positions, increasing the flexibility of use and facilitating tool debugging and testing, adapting to various testing needs.

[0033] like Figure 4As shown, in some embodiments, the screw hole simulator 3 includes a bolt hole sleeve 34 and a fixing cylinder 35. The bolt hole sleeve 34 is fixedly connected to the fixing cylinder 35. The diameter of the bolt hole sleeve 34 is larger than the diameter of the through hole 11 and is detachably connected to the panel 1. The diameter of the fixing cylinder 35 is smaller than the diameter of the through hole 11 to facilitate the passage of the through hole 11. The fixing cylinder 35 has internal threads, an opening 32 at the top, and a viewing window 33 in the lower middle part. The bottom of the fixing cylinder 35 is closed to prevent the collection of debris and avoid its spread during testing.

[0034] In some embodiments, the bolt hole sleeve 34 is detachably connected to the panel 1 by multiple countersunk screws, facilitating disassembly and interchange, allowing users to quickly replace parts or adjust configurations to adapt to different test scenarios. For example, each bolt hole sleeve 34 is fixedly connected to the panel 1 using three, four, or five countersunk screws.

[0035] In some embodiments, the front view of the window 33 is square to maximize the lateral field of view. The length of the window 33 is less than or equal to the diameter of the fixed cylinder 35 to maintain an effective field of view while preventing the window 33 from being too large and affecting the strength of the screw hole simulation body 3. The height of the window 33 is 1 / 6 to 1 / 3 of the height of the fixed cylinder 35, such as 1 / 6, 1 / 5, 1 / 4, 1 / 3, etc., which can be set according to actual needs.

[0036] like Figure 5 As shown, in some embodiments, the support assembly 2 includes at least two support frames 21 and at least two connecting flanges 22. The two support frames 21 are respectively disposed on both sides of the three through holes 11 and connected to the panel 1 through the connecting flanges 22. The connecting flanges 22 are detachably connected to the panel 1 using multiple countersunk screws. The overall structure is simple and meets the requirements for convenient disassembly and installation.

[0037] In some embodiments, the support frame 21 includes a crossbeam 211, an upright 212, diagonal braces 213, and at least two legs 214. The two ends of the upright 212 are fixedly connected to the crossbeam 211 and the connecting flange 22, respectively. The two ends of the diagonal braces 213 are fixedly connected to the crossbeam 211 and the upright 212, respectively. The two legs 214 are spaced apart and installed at the bottom of the crossbeam 211. The legs 214 can be adjustable; when the placement surface is uneven, fine-tuning can be performed to level the surface, preventing overall instability of the simulation test device and thus affecting the repair experiment results. The crossbeam 211, upright 212, and diagonal braces 213 are fixed together by welding. After welding, the weld seams must be ground smooth and flat to ensure the overall stability and aesthetics of the structure.

[0038] In some embodiments, the internal threaded hole 31 has a size of M170*6. The panel 1 is a flange sealing surface, fan-shaped, with a radial thickness of 430mm-450mm. For example, the radial thickness of panel 1 is 430mm, 440mm, or 450mm. The internal threaded hole 31 and panel 1 can accurately simulate the threaded hole size and flange sealing surface size of actual pressure vessels, thereby ensuring that the test conditions are highly consistent with the actual working environment, improving the accuracy and reliability of the test.

[0039] By implementing this utility model, the following beneficial effects can be achieved:

[0040] This invention relates to a simulation test device for repairing threaded holes in reactor pressure vessels. The device features a detachable connection between a threaded hole simulator 3 and a panel 1, allowing at least three simulators 3 to be interchanged, thus extending the lifespan of the simulator and improving the efficiency and accuracy of the simulation debugging. The thread processing process can be observed through the viewing window 33 of the threaded hole simulator 3, enhancing the simulator's practicality and functionality.

[0041] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A simulation test device for reactor vessel bolt thread repair, characterized by, include: The panel (1) has at least three through holes (11); A support component (2) is fixedly connected to the panel (1) to support the panel (1); At least three screw hole simulators (3), each of the screw hole simulators (3) is mounted on the through hole (11) and detachably connected to the panel (1); The screw hole simulator (3) has an internal threaded hole (31), an opening (32) at the top for a tool to enter, and a viewing window (33) at the middle and lower part to observe the internal situation.

2. The simulated test apparatus for reactor vessel bolt thread repair of claim 1, wherein, The screw hole simulation body (3) includes a bolt hole sleeve (34) and a fixed cylinder (35). The bolt hole sleeve (34) is fixedly connected to the fixed cylinder (35). The diameter of the bolt hole sleeve (34) is larger than the diameter of the through hole (11) and is detachably connected to the panel (1). The diameter of the fixed cylinder (35) is smaller than the diameter of the through hole (11) so that it can pass through the through hole (11). The fixed cylinder (35) has a thread inside, an opening (32) at the top, and a viewing window (33) at the middle and lower part.

3. The simulated test apparatus for reactor vessel bolt thread repair of claim 2, wherein, The bolt hole sleeve (34) is detachably connected to the panel (1) by a plurality of countersunk screws.

4. The simulated test apparatus for reactor vessel bolt thread repair of claim 2, wherein, The front view of the window (33) is square.

5. The simulated test apparatus for reactor vessel bolt thread repair of claim 4, wherein, The length of the viewing window (33) is less than or equal to the diameter of the fixed cylinder (35).

6. The simulated test apparatus for reactor vessel bolt thread repair of claim 4, wherein, The height of the viewing window (33) is 1 / 6 to 1 / 3 of the height of the fixed cylinder (35).

7. The simulated test apparatus for reactor vessel bolt thread repair of any of claims 1-6, wherein, The support assembly (2) includes at least two support frames (21) and at least two connecting flanges (22). The two support frames (21) are respectively located on both sides of the three through holes (11) and connected to the panel (1) through the connecting flanges (22).

8. The simulated test apparatus for reactor vessel bolt thread repair of claim 7, wherein, The support frame (21) includes a crossbeam (211), an upright (212), a diagonal brace (213), and at least two legs (214). The two ends of the upright (212) are fixedly connected to the crossbeam (211) and the connecting flange (22), respectively. The two ends of the diagonal brace (213) are fixedly connected to the crossbeam (211) and the upright (212), respectively. The two legs (214) are installed at intervals at the bottom of the crossbeam (211).

9. The simulation test apparatus for repairing threaded holes in reactor pressure vessels according to any one of claims 1-6, characterized in that, The internal threaded hole (31) has a size of M170*6.

10. The simulated test apparatus for reactor vessel bolt thread repair of any of claims 1-6, wherein, The panel (1) is a flange sealing surface, which is fan-shaped and has a radial thickness of 430mm-450mm.

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