Flow equalizing plate wire fixing device and method for flow-induced vibration test

Abstract

The invention provides a flow equalizing plate wire fixing device and method for a flow-induced vibration test, the fixing device comprises a wire conduit, at least two fixing pieces and a support frame, the wire conduit is used for accommodating a sensor wire, and the wire conduit extends from the middle part of a flow equalizing plate to the end part of the peripheral side; the fixing piece covers the outer side of the wire conduit and is connected with the flow equalizing plate; the supporting frame is arranged close to the peripheral side end of the flow equalizing plate and comprises a bottom frame and a matching plate covering the bottom frame, the bottom frame and the matching plate are matched to form a wire passing hole channel, and a sensor wire penetrates through the wire passing hole channel and extends to the peripheral side end of the flow equalizing plate. According to the flow equalizing plate wire fixing device for the flow-induced vibration test, the sensor wire is stored and arranged behind the wire conduit, and the wire conduit is supported and fixed by using the fixing piece and the supporting frame, so that the influence of the wire conduit on flow distribution is reduced, and the influence of wire arrangement on a flow field test result is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of flow-induced vibration tests, and particularly relates to a flow equalizing plate wire fixing device and method for flow-induced vibration tests. Background Art

[0002] The in-core structure is very complex, specifically including components such as the upper in-core structure, the lower in-core structure, and the in-core measurement grid. The in-core structure is located inside the reactor pressure vessel and jointly completes various functions of the reactor with equipment such as the pressure vessel, control rod drive mechanism, and fuel assembly. As one of the most important main equipment in the reactor in-core system, the reliability and safety of its operation are of crucial importance.

[0003] Flow-induced vibration tests can obtain various test data such as pulsating pressure, displacement, strain, and acceleration, enabling researchers to understand the flow-induced vibration behavior of in-core components. All kinds of experimental data need to be measured by corresponding sensors. There are sensors with different functions installed at multiple positions in the reactor, and the sensors need to transmit data through wires.

[0004] In the traditional method, the wires are exposed outside the flow equalizing plate, which is easily damaged by the coolant flowing at high speed. Moreover, the wires in an unfixed state will cover the water holes on the flow equalizing plate, affecting the flow field and thus the measurement results of the flow-induced vibration test.

[0005] Based on this, the inventors of the present application propose a flow equalizing plate wire fixing device and method for flow-induced vibration tests, 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 that the measurement results of the flow-induced vibration test are affected due to the lack of fixation of the sensor wires in the prior art, and to provide a flow equalizing plate wire fixing device and method for flow-induced vibration tests.

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

[0008] The present invention provides a flow equalizing plate wire fixing device for flow-induced vibration tests, including:

[0009] A wire tube for accommodating the sensor wires, and the wire tube extends from the middle of the flow equalizing plate to the circumferential end;

[0010] At least two fixing members, which cover the outside of the wire tube and are connected to the flow equalizing plate;

[0011] A support frame is arranged near the peripheral side end of the current balancing plate, and the support frame includes a base frame and a matching plate covered on the base frame. The base frame and the matching plate cooperate to form a wire passageway, and the sensor wire is passed through the wire passageway and extends to the peripheral side end of the current balancing plate.

[0012] According to one embodiment of the present invention, the wire tube forms a corner section on a side close to the support frame;

[0013] At least one fixing member is provided on a side of the corner section facing away from the supporting frame.

[0014] According to an embodiment of the present invention, the fixing member is a pipe clamp, and the pipe clamp cover is arranged on the outside of the wire tube and one end of the pipe clamp is welded to the current equalizing plate.

[0015] According to one embodiment of the present invention, the base frame includes a first bracket, a second bracket and a connecting frame, and opposite ends of the connecting frame are respectively connected to the first bracket and the second bracket;

[0016] The matching plate includes a first plate body covered on the first bracket and a second plate body covered on the second bracket; wherein,

[0017] The first bracket cooperates with the first plate to form a first wire-passing hole, and the second bracket cooperates with the second plate to form a second wire-passing hole;

[0018] The height of the first wire passing hole increases gradually in the extending direction from the first wire passing hole to the second wire passing hole.

[0019] According to an embodiment of the present invention, the first bracket and the first plate are connected via at least one first connecting member;

[0020] The second bracket and the second plate are connected via at least one second connecting member.

[0021] According to an embodiment of the present invention, both the first connecting member and the second connecting member are threaded connecting members.

[0022] According to an embodiment of the present invention, the axial extension direction of the first wire-passing hole and the axial extension direction of the second wire-passing hole are respectively set at an angle with the upper surface of the flow equalizing plate;

[0023] The axial direction of the first wire passing hole is arranged in parallel with the axial direction of the second wire passing hole.

[0024] According to one embodiment of the present invention, the wire tube is arranged along the inter-hole area between the water flow holes on the surface of the flow equalizing plate.

[0025] According to an embodiment of the present invention, the included angle between the wire passing hole and the flow equalizing plate is at least not greater than 30 degrees.

[0026] The present invention also provides a method for fixing the wires of the flow equalizing plate for flow-induced vibration tests, which is realized by using the device for fixing the wires of the flow equalizing plate for flow-induced vibration tests as described above. The fixing method includes:

[0027] Determine the extension path of the wire tube on the flow equalizing plate; wherein, the extension path passes through the inter-hole area between the water flow holes on the surface of the flow equalizing plate;

[0028] Set up a support frame on the flow equalizing plate and arrange the wire tube along the extension path; wherein, at least two fixing parts are arranged along the arrangement path of the wire tube.

[0029] The positive and progressive effects of the present invention are as follows:

[0030] For the device for fixing the wires of the flow equalizing plate for flow-induced vibration tests of the present invention, after the sensor wires are collected and placed in the wire tube, the wire tube is supported and fixed by the fixing parts and the support frame, thereby reducing the influence of the wire tube on the flow distribution and reducing the influence of the wire arrangement on the results of the flow field test. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above-mentioned and other features, properties and advantages of the present invention will become more obvious through the following description in conjunction with the drawings and embodiments, wherein:

[0032] Figure 1 is the layout structure schematic diagram of the device for fixing the wires of the flow equalizing plate for flow-induced vibration tests of the present invention;

[0033] Figure 2 is Figure 1 the enlarged structure schematic diagram at A in

[0034] Figure 3 is Figure 1 the top view of a partial structure of

[0035] Figure 4 is Figure 1 the schematic diagram of the arrangement of the support frame in

[0036] Figure 5 is Figure 4 the structure schematic diagram of the chassis in

[0037] Figure 6 is Figure 4 the structure schematic diagram of the first plate body in

[0038] Figure 7 is Figure 4 the structure schematic diagram of the second plate body in

[0039] Figure 8 Structural schematic diagram of the fixing part of the present invention;

[0040] Figure 9 Flow field schematic diagram of the flow equalizing plate under the actual installation state of the present invention.

[0041] 1. Conduit; 11. Corner section;

[0042] 2. Flow equalizing plate;

[0043] 3. Fixing part;

[0044] 4. Support frame; 41. Bottom frame; 411. First support; 412. Second support; 413. Connecting frame; 42. Matching plate; 421. First plate body; 422. Second plate body; 43. Wire passing hole channel; 431. First wire passing hole channel; 432. Second wire passing hole channel; 44. First connecting piece; 45. Second connecting piece. Detailed implementation manners

[0045] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are elaborated in the following description for 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.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled 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 "including" and "having" and any variations thereof in the specification and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion.

[0047] Please refer to Figures 1 to 8 , the present invention provides a fixing device for the sensor wire of the flow equalizing plate for the flow-induced vibration test, including a conduit 1, at least two fixing parts 3 and a support frame 4. The conduit 1 is used for accommodating the sensor wire, and the conduit 1 extends from the middle part to the circumferential end of the flow equalizing plate 2; the fixing part 3 covers the outside of the conduit 1 and is connected to the flow equalizing plate 2; the support frame 4 is arranged near the circumferential end of the flow equalizing plate 2. The support frame 4 includes a bottom frame 41 and a matching plate 42 covering the bottom frame 41. The bottom frame 41 and the matching plate 42 cooperate to form a wire passing hole channel 43, and the sensor wire passes through the wire passing hole channel 43 and extends to the circumferential end of the flow equalizing plate 2.

[0048] Traditional sensor wires do not have dedicated fixing devices for fixing. Instead, they extend from the middle of the flow equalizing plate 2 towards the peripheral end, and a fixing structure is set at the peripheral end for fixing. Moreover, near the peripheral end, the sensor wires change from horizontal arrangement to vertical arrangement, and the sensor wires will bend at a large angle.

[0049] Based on the working principle of a pressurized water reactor, the coolant will converge at the bottom head of the pressure vessel. The coolant flows from bottom to top and from outside to inside at the flow equalizing plate 2. The flow field at the flow equalizing plate 2 is complex and the flow rate is large. Therefore, the traditional arrangement method of sensor wires cannot avoid the direct impact of the coolant with too high a flow rate on the sensor wires. On the one hand, the high-speed impact will damage the structure of the sensor wires. On the other hand, it will also cause the sensor wires to shift at the upper surface position of the flow equalizing plate 2. Furthermore, part of the sensor wires will cover the water flow holes on the flow equalizing plate 2, thus affecting the subsequent flow-induced vibration test data.

[0050] Based on this, the present invention uniformly regularizes the sensor wires and sets a wire pipe 1 to protect them, thereby avoiding the direct impact of the coolant with too high a flow rate on the sensor leads and playing a role in protecting the sensor leads.

[0051] Furthermore, at least two fixing members 3 are arranged along the extending path of the wire pipe 1. The fixing members 3 are used to fix the wire pipe 1, avoiding the wire pipe 1 deviating from its original extending path under the impact of the coolant and avoiding the wire pipe 1 excessively blocking the water flow holes on the flow equalizing plate 2 and affecting the flow-induced vibration test results.

[0052] It should be noted that to ensure the protection of the wire pipe 1 for the sensor wires, the material of the wire pipe 1 is a metal material. Therefore, the wire pipe 1 itself has a certain rigidity. So, a support frame 4 is arranged near the peripheral end of the flow equalizing plate 2. The support frame 4 is used to reduce the angle between the wire pipe 1 and the surface of the flow equalizing plate 2, thereby avoiding excessive bending of the wire pipe 1 and damaging its own structure.

[0053] Moreover, the support frame 4 also plays a role in guiding and fixing the wire pipe 1, enabling the wire pipe 1 to be smoothly led to the wall of the hanging basket cylinder.

[0054] Moreover, since the sensor wires are armored wires, they also cannot be bent excessively. Therefore, the present invention adopts the support frame 4, which can not only avoid excessive bending of the wire pipe 1 itself and being damaged, but also protect the internal sensor wires from being bent at too large an angle and being stretched and damaged, and also plays a good role in protecting the sensor wires.

[0055] Please refer to Figures 1 to 4 , a corner section 11 is formed on one side of the wire pipe 1 close to the support frame 4; at least one fixing member 3 is provided on the side of the corner section 11 facing away from the support frame 4.

[0056] When the conduit 1 extends from the middle to the peripheral side of the flow equalizing plate 2, before reaching the support frame 4, the conduit 1 is arranged in contact with the upper surface of the flow equalizing plate 2. After reaching the support frame 4, the conduit 1 passes upward through the wire passing hole 43 provided on the support frame 4, and thus the conduit 1 is separated from the flow equalizing plate 2 and extends upward. To prevent the conduit 1 from shaking near the front end of the support frame 4, a fixing member 3 is provided at the corner section 11 to fix it, thereby improving the fixing strength of the conduit 1.

[0057] Please refer to Figure 4 and Figure 8 As shown in, the fixing member 3 is a pipe clamp, and the pipe clamp is sleeved outside the conduit 1 and one end is welded to the flow equalizing plate 2.

[0058] The pipe clamp as a whole is a sheet-like structure, and the middle part is a circular arc bulge, thereby forming a chamber for clamping the conduit 1. The two sides of the pipe clamp can be connected to the top surface of the flow equalizing plate 2 by welding. The chamber in the middle clamps the conduit 1 to prevent the conduit 1 from deviating from its own position under the impact of the coolant flowing at high speed.

[0059] It can be seen that along the layout path of the conduit 1, a plurality of fixing members 3 can be provided as needed, and the specific number of the fixing members 3 is not limited herein.

[0060] Please refer to Figures 5 to 7 As shown in, the chassis 41 includes a first support 411, a second support 412 and a connecting frame 413. The opposite ends of the connecting frame 413 are respectively connected to the first support 411 and the second support 412; the mating plate 42 includes a first plate body 421 covering the first support 411 and a second plate body 422 covering the second support 412; wherein, the first support 411 and the first plate body 421 cooperate to form a first wire passing hole 431, and the second support 412 and the second plate body 422 cooperate to form a second wire passing hole 432; the height increases in the extending direction from the first wire passing hole 431 to the second wire passing hole 432.

[0061] Since the material of the conduit 1 is metal, to avoid damage caused by excessive bending, the support frame 4 is provided in the present invention. The chassis 41 in the support frame 4 is divided into a first support 411, a second support 412 and a connecting frame 413 between the first support 411 and the second support 412. The first wire passing hole 431 and the second wire passing hole 432 formed by the first support 411 and the second support 412 can support the conduit 1 in sequence. On the one hand, the bending length of the conduit 1 is enlarged, so that the stress area is larger and it is not easily damaged due to bending; on the other hand, the support length of the conduit 1 is increased, thereby improving the support stability for the conduit 1.

[0062] It should be noted that the connecting frame 413 contracts inward relative to the first support 411 and the second support 412 to form an avoidance space. On the one hand, this can improve the structural stability of the chassis 41. On the other hand, the avoidance space is used to avoid the water holes on the flow equalizing plate 2, thereby preventing interference between the chassis 41 and the water holes and affecting the test results.

[0063] Furthermore, the first support 411 and the first plate body 421 are connected by at least one first connecting member 44; the second support 412 and the second plate body 422 are connected by at least one second connecting member 45.

[0064] It can be seen that the first plate body 421 and the first support 411 are detachably connected by the first connecting member 44, while the second plate body 422 and the second support 412 are detachably connected by the second connecting member 45. Optionally, anti-loosening caps can also be provided on the first connecting member 44 and the second connecting member 45 for anti-loosening, thereby improving the connection stability between the first support 411 and the first plate body 421 and the connection stability of the second support 412 and the second connecting member 45.

[0065] The bottom of the first support 411 and the flow equalizing plate 2 can be connected by a threaded connector or welding, and the bottom of the second support 412 and the flow equalizing plate 2 support can also be connected by a threaded connector or welding. The specific connection method is not limited here.

[0066] Optionally, both the first connecting member 44 and the second connecting member 45 are threaded connectors, such as bolts, screws, etc., which are not limited here.

[0067] Furthermore, the axial extension directions of the first wire passing hole 431 and the second wire passing hole 432 are respectively set at an angle with the upper surface of the flow equalizing plate 2; the axial directions of the axes of the first wire passing hole 431 and the second wire passing hole 432 are arranged in parallel.

[0068] That is to say, the first wire passing hole 431 and the second wire passing hole 432 are coaxially arranged. Therefore, the wire conduit 1 only needs to be bent at one angle, avoiding multiple bends of the wire, and the two sections of the hole can greatly increase the support area for the wire conduit 1, thereby improving the support stability of the wire conduit 1, preventing the wire conduit 1 from shaking violently under the impact of the high-speed flowing coolant, and improving the service life of the wire conduit 1 and the internal sensor wires.

[0069] Optionally, the angle between the wire passing hole 43 and the flow equalizing plate 2 is at least not greater than 30 degrees.

[0070] That is, according to the structural characteristics of the conduit 1 itself, the present invention preferably sets the bending angle of the conduit 1 to be less than 30 degrees. This can protect the conduit 1 from being damaged due to excessive bending. At the same time, it can also protect the sensor wires inside the conduit 1 from being over-stretched and bent, and also reduces the difficulty of threading the sensor wires through the conduit 1.

[0071] In some other alternative embodiments, the angle between the wire passing hole 43 and the flow equalizing plate 2 can be adaptively adjusted according to the characteristics of the conduit 1 and the sensor wires. For example, the angle can exceed 30 degrees, and the specific angle data is not limited herein.

[0072] To avoid the arrangement of the conduit 1 affecting the accuracy of the flow-induced vibration test data, the present invention arranges the conduit 1 along the inter-hole area between the water flow holes on the surface of the flow equalizing plate 2.

[0073] That is, first determine the arrangement path on the flow equalizing plate 2, and then install the conduit 1. This not only protects the sensor wires through the conduit 1, but also does not affect the test data due to the structure of the conduit 1.

[0074] It should be noted that the water flow at the flow equalizing plate 2 flows from bottom to top and from outside to inside, and the flow field environment is relatively complex. Therefore, the present invention arranges the conduit 1 to avoid the water flow holes provided on the flow equalizing plate 2 to prevent the coolant from directly impacting the conduit 1, and also to avoid the conduit 1 blocking the water flow holes and affecting the flow channel.

[0075] In summary, based on the situation that the coolant flow rate is too high on the upper surface of the flow equalizing plate 2, to avoid damage to the sensor wires caused by the high-speed flowing coolant, the present invention first sets the conduit 1 to accommodate the sensor wires to protect the sensor wires. Moreover, by selecting the inter-hole area of the water flow holes on the surface of the flow equalizing plate 2 to arrange the conduit 1, it is possible to avoid the conduit 1 covering the water flow holes and affecting the data of the flow-induced vibration test. Then, fixings 3 and support frames 4 are arranged along the arrangement path of the conduit 1 to ensure that the conduit 1 on the upper surface of the flow equalizing plate 2 is not affected by the impact of the high-speed flowing coolant, and the support stability of the conduit 1 is improved.

[0076] The present invention also proposes a method for fixing the wires of the flow equalizing plate for flow-induced vibration tests, which is realized by using the above-mentioned device for fixing the wires of the flow equalizing plate for flow-induced vibration tests. The fixing method includes:

[0077] Determine the extension path of the conduit on the flow equalizing plate; wherein, the extension path penetrates through the inter-hole area between the water flow holes on the surface of the flow equalizing plate;

[0078] Set up a support frame on the flow equalizing plate and arrange the conduit along the extension path; wherein, at least two fixings are arranged along the arrangement path of the conduit.

[0079] In the present invention, after the sensor wires are concentrated, they are housed in a wire tube, and the wire tube is installed and supported by fixing members and a support frame, which improves the stability of the arrangement of the sensor wires and also reduces the influence of the wire tube on the flow distribution, thereby reducing its influence on the test results.

[0080] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; 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 circumstances.

[0081] The present application uses specific terms to describe the embodiments of the present application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of the present 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 the present application can be appropriately combined.

[0082] Although the present invention is disclosed above in 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 modification, equivalent change, and modification 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 fixing device for a flow-uniforming plate in a flow-induced vibration test, characterized in that, Including: A wire conduit for accommodating sensor wires, the wire conduit extending from the middle part to the circumferential end of the flow equalizing plate; At least two fixing members, the fixing members covering the outside of the wire conduit and connected to the flow equalizing plate; A support frame disposed near the circumferential end of the flow equalizing plate, the support frame including a bottom frame and a mating plate covering the bottom frame, the bottom frame and the mating plate cooperating to form a wire passing channel, and the sensor wires passing through the wire passing channel and extending to the circumferential end of the flow equalizing plate.

2. The flow equalizing plate wire fixing device for flow-induced vibration test according to claim 1, characterized in that, The wire conduit forms a corner section on the side close to the support frame; At least one of the fixing members is provided on the side of the corner section facing away from the support frame.

3. The wire fixing device for the flow-uniforming plate in the flow-induced vibration test according to claim 1, characterized in that, The fixing member is a pipe clamp, the pipe clamp covering the outside of the wire conduit and having one end welded to the flow equalizing plate.

4. The wire fixing device for the flow equalizing plate in the flow-induced vibration test according to claim 1, characterized in that, The bottom frame includes a first support, a second support, and a connecting frame, the opposite ends of the connecting frame being respectively connected to the first support and the second support; The mating plate includes a first plate body covering the first support and a second plate body covering the second support; wherein, The first support and the first plate body cooperate to form a first wire passing channel, and the second support and the second plate body cooperate to form a second wire passing channel; The height increases in the extending direction from the first wire passing channel to the second wire passing channel.

5. The flow-uniforming plate wire fixing device for flow-induced vibration test according to claim 4, characterized in that, The first support and the first plate body are connected by at least one first connecting member; The second support and the second plate body are connected by at least one second connecting member.

6. The flow-uniforming plate wire fixing device for flow-induced vibration test according to claim 5, characterized in that, Both the first connecting member and the second connecting member are threaded connecting members.

7. The flow - equalizing plate wire fixing device for flow - induced vibration test according to claim 5, characterized in that, The axial extending direction of the first wire passing channel and the axial extending direction of the second wire passing channel are respectively set at an angle with the upper surface of the flow equalizing plate; The axial direction of the first wire passing channel is arranged parallel to the axial direction of the second wire passing channel.

8. The wire fixing device for the flow-uniforming plate in the flow-induced vibration test according to claim 1, characterized in that, The wire conduit is arranged along the inter-hole area between the surface water holes of the flow equalizing plate.

9. The wire fixing device for the flow-uniforming plate in the flow-induced vibration test according to claim 1, characterized in that, The angle between the wire passing channel and the flow equalizing plate is at least not greater than 30 degrees.

10. A method for fixing the wire of the flow straightening plate for flow-induced vibration test, characterized in that, Implemented by using the flow-induced vibration test flow equalizing plate wire fixing device according to any one of claims 1-9, the fixing method includes: Determine the extending path of the wire conduit on the flow equalizing plate; wherein, the extending path passes through the inter-hole area between the surface water holes of the flow equalizing plate; Set a support frame on the flow equalizing plate and arrange the wire conduit along the extending path; wherein, at least two fixing members are arranged along the arrangement path of the wire conduit.

Images