Wire arrangement system and method for comprehensive flow-induced vibration test of reactor internals

Abstract

The invention provides a wire arrangement system and method for a comprehensive flow-induced vibration test of reactor internals, the arrangement system comprises a hanging basket barrel flange and an end plug, and the hanging basket barrel flange is provided with a cooling pipe; one end of the end plug is inserted into the cooling pipe, the other end of the end plug extends to the outer side of the cooling pipe, the top of the end plug is provided with a locking nut, the locking nut sleeves the outer side of the end plug and is in threaded fit with the end plug, and the bottom surface of the locking nut abuts against the top surface of the cooling pipe; wherein the end plug is at least partially cut off in the axial direction to form a mounting plane, the end plug is provided with a placement groove in the mounting plane in the axial direction, one side of the end plug is provided with at least one wire pressing sheet, and the wire pressing sheet is used for covering a sensor wire in the placement groove and connecting the sensor wire with the end plug. According to the arrangement system, the end plug is arranged in the cooling pipe, so that the sensor wire can be further fixed by using the wire pressing sheet in the cooling pipe by means of the end plug, the protection of the sensor wire in the cooling pipe is improved, and the damage of a complex flow field to the sensor wire is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of comprehensive flow-induced vibration test of in-core components, and particularly relates to a wire layout system and method for comprehensive flow-induced vibration test of in-core components. Background Art

[0002] Before the first reactor is put into formal operation, a comprehensive flow-induced vibration test of in-core components needs to be carried out to detect the vibration data of in-core components and verify the reliability of in-core components.

[0003] In the comprehensive flow-induced vibration sensor and wire layout scheme of in-core components, the wires from the lower in-core components need to pass upward along the outer wall of the hanging basket through the top cover cooling pipe (hereinafter referred to as "cooling pipe" for short) and enter the upper head of the pressure vessel, where they are aggregated with the sensor wires of the upper in-core components.

[0004] Since the flow velocity in the cooling pipe is relatively high, in order to ensure the safety of the wires, the wire pressing pieces are used to fix the wires on the outer wall of the hanging basket close to the cooling pipe. The space in the cooling pipe is limited, and it is impossible to directly fix and protect the wires with wire pressing pieces. If metal tie straps are directly used to restrain the wires, although the stiffness of the wire bundle can be increased, when the number of wires in the cooling pipe is small, the stiffness of the wire bundle cannot be effectively increased.

[0005] Based on this, the inventors of the present application propose a wire layout system and method for comprehensive flow-induced vibration test of in-core components, in order to solve one or more of the above technical problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defect of poor wire fixing and protection effect when the sensor wires are arranged upward through the cooling pipe in the prior art, and provide a wire layout system and method for comprehensive flow-induced vibration test of in-core components.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] The present invention provides a wire layout system for comprehensive flow-induced vibration test of in-core components, including:

[0009] A hanging basket cylinder flange, on which a cooling pipe is provided;

[0010] A plug, one end of which is inserted into the cooling pipe, and the other end extends to the outside of the cooling pipe. A locking nut is provided on the top of the plug. The locking nut is sleeved outside the plug and is in threaded cooperation with the plug. The bottom surface of the locking nut abuts against the top surface of the cooling pipe; wherein,

[0011] The end plug is axially at least partially cut to form a mounting plane. A placement groove is axially formed in the end plug on the mounting plane. At least one wire pressing piece is provided on one side of the end plug. The wire pressing piece is used to cover the sensor wire in the placement groove and connect it to the end plug.

[0012] According to an embodiment of the present invention, a locking portion is provided in the middle of the cooling pipe, and a fitting surface is formed at the bottom of the locking portion;

[0013] The end plug includes a fitting portion and an extending portion connected to the fitting portion. The circumferential dimension of the fitting portion is larger than that of the extending portion. The extending portion penetrates through the cooling pipe and extends to the outside of the cooling pipe. The locking nut cooperates with the extending portion with a preset pre-tightening force so that the top surface of the fitting portion is in contact with the bottom surface of the locking portion.

[0014] According to an embodiment of the present invention, mounting holes are formed in the flange of the hanging basket cylinder body. The fitting portion penetrates through the mounting holes and at least partially extends into the cooling pipe.

[0015] According to an embodiment of the present invention, an impact chamber is formed in the mounting hole between the bottom surface of the fitting portion and the bottom surface of the flange of the hanging basket cylinder body.

[0016] According to an embodiment of the present invention, a fitting hole is formed in the middle of the locking nut. One end of the end plug passes through the fitting hole and is in threaded cooperation with the locking nut.

[0017] According to an embodiment of the present invention, the top of the extending portion has a threaded section;

[0018] A protruding section is provided at the top of the end plug. The protruding section is arranged in an arc around the extending portion. The threaded section at least partially extends to the protruding section.

[0019] According to an embodiment of the present invention, when the locking nut is in the installed state with the end plug, the bottom of the locking nut is welded to the cooling pipe.

[0020] According to an embodiment of the present invention, when the locking nut is in the installed state with the end plug, the locking nut is welded to the end plug on the circumference around the fitting hole.

[0021] According to an embodiment of the present invention, the depth of the placement groove is less than the diameter of the sensor wire.

[0022] The present invention also provides a wire arrangement method for the comprehensive flow-induced vibration test of in-core components. Using the wire arrangement system for the comprehensive flow-induced vibration test of in-core components as described above, the arrangement method includes:

[0023] Determine the target cooling pipe on the flange of the hanging basket cylinder body;

[0024] Install the sensor wire to the end plug, and install the end plug to the target cooling pipe.

[0025] The positive and progressive effects of the present invention are as follows:

[0026] The wire layout system for the comprehensive flow-induced vibration test of in-core components of the present invention sets an end plug in the cooling pipe, so that the wire pressing piece can be further used to fix the sensor wire in the cooling pipe by means of the end plug, thereby improving the protection of the sensor wire in the cooling pipe and avoiding damage to the sensor wire caused by the complex flow field. Description of the Drawings

[0027] The above-mentioned and other features, properties and advantages of the present invention will become more obvious through the following description with reference to the drawings and embodiments, wherein:

[0028] Figure 1 is a schematic structural diagram of the wire layout system for the comprehensive flow-induced vibration test of in-core components of the present invention;

[0029] Figure 2 is a partial cross-sectional view of the wire layout system for the comprehensive flow-induced vibration test of in-core components of the present invention;

[0030] Figure 3 is Figure 1 a schematic structural diagram of the end plug in

[0031] Figure 4 is Figure 1 a schematic structural diagram of the wire pressing piece in

[0032] Figure 5 is Figure 1 a schematic structural diagram of the locking nut in

[0033] 1. Flange of the hanging basket cylinder body; 11. Cooling pipe; 12. Locking part; 13. Fitting surface; 14. Installation hole; 15. Impact chamber;

[0034] 2. End plug; 21. Installation plane; 22. Placing groove; 23. Wire pressing piece; 24. Fitting part; 25. Protruding part; 251. Threaded section; 26. Protruding section;

[0035] 3. Locking nut; 31. Fitting hole;

[0036] 4. Sensor wire. Detailed Embodiments

[0037] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. In the following description, more details are set forth to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0039] The present invention provides a wire arrangement system for comprehensive flow-induced vibration tests of in-core components. The arrangement system includes a basket cylinder flange 1 and an end plug 2. A cooling pipe 11 is provided on the basket cylinder flange 1; one end of the end plug 2 is inserted into the cooling pipe 11, and the other end extends to the outside of the cooling pipe 11. A locking nut 3 is provided on the top of the end plug 2. The locking nut 3 is sleeved on the outside of the end plug 2 and is in threaded cooperation with the end plug 2. The bottom surface of the locking nut 3 abuts against the top surface of the cooling pipe 11.

[0040] Wherein, at least part of the end plug 2 is axially cut to form a mounting plane 21. A placement groove 22 is axially formed on the mounting plane 21 of the end plug 2. At least one wire pressing piece 23 is provided on one side of the end plug 2. The wire pressing piece 23 is used to cover the sensor wire 4 in the placement groove 22 and connect it to the end plug 2.

[0041] It should be noted that the cooling pipe 11 is connected to the basket cylinder flange 1 by welding. It can be seen that the coolant entering from the inlet nozzle flows upward to the cooling pipe 11 provided on the basket cylinder flange 1, and the coolant is sprayed to the top of the reactor through the cooling pipe 11 for cooling the top of the reactor.

[0042] During the comprehensive flow-induced vibration test, the sensor wires 4 of the lower in-core components are aggregated upward with the sensor wires 4 of the upper in-core components through the cooling pipe 11.

[0043] Therefore, the flow rate of the coolant in the cooling pipe 11 is very high. If the sensor wire 4 directly passes through, the sensor wire 4 does not completely occupy the space of the cooling pipe 11. Then, the coolant flowing through the cooling pipe 11 will continuously impact the sensor wire 4, and there is a risk of damaging the sensor wire 4.

[0044] Moreover, the space in the cooling pipe 11 is limited, and it is impossible to directly fix the sensor wire 4 using the wire pressing piece 23. Even if it is fixed, it cannot withstand the impact of the coolant, but there is a risk of the pressing piece falling off, thus adding an additional risk of subsequent maintenance.

[0045] Based on this, in the present invention, a plug 2 is provided in the cooling pipe 11. The plug 2 is partially cut along its axial direction to form a mounting plane 21, and a placement groove 22 is opened on the mounting plane 21. Thus, the sensor wire 4 can be placed in the placement groove 22, and the wire pressing piece 23 is further used to fix the sensor wire 4. Therefore, the plug 2 cooperating with the wire pressing piece 23 can greatly improve the fixing strength of the sensor wire 4 in the cooling pipe 11.

[0046] Moreover, due to the setting of the plug 2, the coolant below the flange 1 of the hanging basket cylinder body does not directly impact the sensor wire 4, thereby further reducing the risk of damage to the sensor wire 4.

[0047] Please refer to Figure 1 and Figure 4 , the wire pressing piece 23 is integrally sheet-shaped and has a convex structure in the middle, thereby forming a chamber for accommodating the sensor wire 4. The two sides are flat plate structures and are provided with a plurality of positioning holes, and the wire pressing piece 23 can be connected to the plug 2 by welding at the positioning holes.

[0048] Please refer to Figures 1 to 3 , a locking portion 12 is provided in the middle of the cooling pipe 11, and a fitting surface 13 is formed at the bottom of the locking portion 12. The plug 2 includes a fitting portion 24 and an extending portion 25 connected to the fitting portion 24. The circumferential dimension of the fitting portion 24 is larger than that of the extending portion 25. The extending portion 25 passes through the cooling pipe 11 and extends to the outside of the cooling pipe 11. The locking nut 3 is fitted with the extending portion 25 with a preset pre-tightening force so that the top surface of the fitting portion 24 is in contact with the bottom surface of the locking portion 12.

[0049] By providing the locking portion 12 in the middle of the cooling pipe 11, on the one hand, the impact of the coolant on the locking nut 3 can be reduced, protecting the locking nut 3 from damage; on the other hand, it can ensure that the top surface of the fitting portion 24 is in close contact with the bottom surface of the locking portion 12.

[0050] Thus, the defect that a gap is generated between the top surface of the fitting portion 24 and the bottom surface of the locking portion 12, resulting in the plug 2 moving up and down under the action of the buoyancy of the water flow, causing the cooling pipe 11 to deform and affecting the safety of the in-core structure equipment and further affecting the cooling of the pressure vessel top cover is avoided.

[0051] Furthermore, a mounting hole 14 is opened on the flange 1 of the hanging basket cylinder body, and the fitting portion 24 passes through the mounting hole 14 and at least partially extends into the cooling pipe 11.

[0052] The mounting hole 14 penetrates through the thickness direction of the flange 1 of the hanging basket cylinder body, and a cooling pipe 11 is installed at the top. The end plug 2 is inserted upward from the bottom of the mounting hole 14 and is finally clamped on the bottom surface of the locking portion 12.

[0053] It can be seen that an impact chamber 15 is formed in the mounting hole 14 between the bottom surface of the mating portion 24 and the bottom surface of the flange 1 of the hanging basket cylinder body.

[0054] The coolant continuously impacts the end plug 2 in the impact chamber 15, thereby ensuring that the top surface of the mating portion 24 of the end plug 2 always remains in a state of tightly abutting against the bottom surface of the locking portion 12.

[0055] Please continue to refer to Figure 1 and Figure 5 , a mating hole 31 is provided in the middle of the locking nut 3, and one end of the end plug 2 passes through the mating hole 31 and is in threaded cooperation with the locking nut 3.

[0056] To simultaneously satisfy the avoidance and connection functions of the protruding portion 25 of the end plug 2, a threaded hole is provided in the middle of the locking nut 3 and is in threaded cooperation with the external thread provided on the top of the protruding portion 25. To improve the connection stability of the locking nut 3 to the end plug 2, the locking nut 3 is locked until its bottom surface abuts against the top surface of the cooling pipe 11.

[0057] That is, the top of the protruding portion 25 has a threaded section 251; a protruding section 26 is provided at the top of the end plug 2, and the protruding section 26 is arranged in an arc around the protruding portion 25, and the threaded section 251 at least partially extends to the protruding section 26.

[0058] The setting of the protruding section 26 is to improve the connection stability between the locking nut 3 and the protruding portion 25, and at the same time prevent the threaded section 251 of the end plug 2 from being deformed due to excessive torque during the cooperation between the locking nut 3 and the end plug 2, thereby damaging the sensor wire 4.

[0059] It can be seen that the protruding section 26 can be arranged in a ring shape around the circumferential circle of the protruding portion 25, or can be close to a ring shape, leaving an area for the placement groove 22. Both methods are acceptable and are not limited here.

[0060] Furthermore, when the locking nut 3 is installed with the end plug 2, the bottom of the locking nut 3 is welded to the cooling pipe 11.

[0061] Moreover, when the locking nut 3 is installed with the end plug 2, the locking nut 3 is welded to the end plug 2 on the circumferential side of the mating hole 31.

[0062] That is, there is not only one way of threaded connection between the end plug 2 and the locking nut 3, but also welding. Adopting threaded connection and welding simultaneously can greatly ensure the connection stability between the locking nut 3, the end plug 2 and the cooling pipe 11.

[0063] It can be known that the depth of the placement groove 22 is less than the diameter of the sensor wire 4.

[0064] Thus, the wire pressing piece 23 can be fully attached to the sensor wire 4, improving the fixing effect of the wire pressing piece 23 on the sensor wire 4.

[0065] It should be noted that the present invention provides an end plug 2 in the cooling pipe 11. Applying a preset pre-tightening force during installation can ensure that the end plug 2 is constrained at the locking part 12 of the cooling pipe 11, thereby avoiding the generation of a gap between the mating part 24 of the end plug 2 and the locking part 12, which may cause the end plug 2 to move up and down under the action of the water flow buoyancy force, generating vibration and further damaging the wire.

[0066] It should be noted that the pre-tightening force should not be too large, otherwise it will cause excessive axial force to deform the cooling pipe 11, affecting the equipment safety of the in-core components and further affecting the cooling of the pressure vessel head cover.

[0067] It can be known that the above-mentioned pre-tightening force can be corrected and verified by combining finite element analysis and full-scale tests. The specific method will not be elaborated here.

[0068] For the wire arrangement system for the comprehensive flow-induced vibration test of in-core components of the present invention, the exposed part of the sensor wire 4 is very small. The positioning and protection of the sensor wire 4 are realized through threading and welding methods, reducing the damage caused by the complex flow field to the sensor wire 4.

[0069] The present invention also provides a wire arrangement method for the comprehensive flow-induced vibration test of in-core components. Using the above-mentioned wire arrangement system for the comprehensive flow-induced vibration test of in-core components, the arrangement method includes:

[0070] Determine the target cooling pipe on the flange of the basket cylinder;

[0071] Install the sensor wire on the end plug and install the end plug on the target cooling pipe.

[0072] Using the above method, the present invention can realize the positioning and protection of the sensor wire in the cooling pipe, reducing the damage caused by the complex flow field to the sensor wire. Moreover, the above operations are independent of other equipment and can be completed only on the flange of the basket cylinder, with low installation difficulty.

[0073] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can also be a mechanical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0074] This application uses specific terms to describe the embodiments of this application. For example, "an embodiment", "one embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0075] Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A wire layout system for comprehensive flow-induced vibration tests of in-core components, characterized in that Comprising: A hanging basket cylinder flange, on which a cooling pipe is provided; An end plug, one end of which is inserted into the cooling pipe, and the other end extends to the outside of the cooling pipe. A locking nut is provided on the top of the end plug. The locking nut is sleeved on the outside of the end plug and is in threaded cooperation with the end plug. The bottom surface of the locking nut abuts against the top surface of the cooling pipe; wherein, At least part of the end plug is axially cut to form an installation plane. A placement groove is axially formed on the installation plane of the end plug. At least one wire pressing piece is provided on one side of the end plug. The wire pressing piece is used to cover the sensor wire in the placement groove and connect it to the end plug.

2. The wire layout system for the comprehensive flow-induced vibration test of in-core components according to claim 1, wherein A locking part is provided in the middle of the cooling pipe, and a fitting surface is formed at the bottom of the locking part; The end plug includes a fitting part and an extending part connected to the fitting part. The circumferential dimension of the fitting part is larger than that of the extending part. The extending part passes through the cooling pipe and extends to the outside of the cooling pipe. The locking nut cooperates with the extending part with a preset pre-tightening force so that the top surface of the fitting part fits against the bottom surface of the locking part.

3. The wire layout system for the comprehensive flow-induced vibration test of in-core components according to claim 2, wherein, An installation hole is formed in the hanging basket cylinder flange. The fitting part passes through the installation hole and at least partially extends into the cooling pipe.

4. The wire layout system for the comprehensive flow-induced vibration test of in-core components according to claim 3, wherein, An impact chamber is formed in the installation hole between the bottom surface of the fitting part and the bottom surface of the hanging basket cylinder flange.

5. The wire layout system for the comprehensive flow-induced vibration test of in-core components according to claim 3, wherein, A fitting hole is formed in the middle of the locking nut. One end of the end plug passes through the fitting hole and is in threaded cooperation with the locking nut.

6. The wire layout system for the comprehensive flow-induced vibration test of in-core components according to claim 5, characterized in that, The top of the extending part has a threaded section; A protruding section is provided on the top of the end plug. The protruding section is arranged in an arc around the extending part. The threaded section at least partially extends to the protruding section.

7. The wire layout system for the comprehensive flow-induced vibration test of in-core components according to claim 5, characterized in that, When the locking nut is in the installed state with the end plug, the bottom of the locking nut is welded to the cooling pipe.

8. The wire layout system for the comprehensive flow-induced vibration test of in-core components according to claim 5, characterized in that, When the locking nut is in the installed state with the end plug, the locking nut is welded to the end plug on the circumference around the fitting hole.

9. The wire layout system for the comprehensive flow-induced vibration test of in-core components according to claim 1, wherein, The depth of the placement groove is less than the diameter of the sensor wire.

10. A wire layout method for comprehensive flow-induced vibration tests of in-core components, characterized in that Adopting the wire arrangement system for the comprehensive flow-induced vibration test of in-core components as described in any one of claims 1-9, the arrangement method includes: Determining a target cooling pipe on the hanging basket cylinder flange; Installing the sensor wire on the end plug and installing the end plug on the target cooling pipe.

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