Swing check valve transient dynamic analysis method and device, storage medium and electronic equipment

Abstract

The invention relates to a transient dynamic analysis method and device for a swing check valve, a storage medium and electronic equipment. The transient dynamic analysis method comprises the following steps that parameter information and design working conditions of the check valve are obtained; constructing a three-dimensional model of the check valve based on the parameter information and the design working condition; carrying out full-circulation transient fluid mechanics calculation based on the three-dimensional model to obtain a calculation result; performing internal flow field distribution characteristic analysis according to a calculation result to obtain internal flow field distribution characteristics of the check valve; and performing statistical analysis according to a calculation result to obtain a dynamic law of the check valve. According to the method, the high-precision transient dynamic characteristic analysis of the swing check valve is realized, the multi-working-condition adaptability is improved, the motion law of the valve can be quickly predicted, the safety is enhanced, the operation and maintenance cost is reduced, and the method is obviously superior to a traditional steady-state model.

Description

Technical Field

[0001] The present invention relates to the field of analysis of nuclear power plant pipeline components, and more specifically, to a transient dynamics analysis method, device, storage medium, and electronic device for a swing check valve. Background Art

[0002] As a key safety component of the nuclear power plant pipeline system, the transient dynamics characteristics of the swing check valve are directly related to the reliability and safety of the system operation. Existing research has made certain progress in the dynamic response of the valve and the flow field analysis. For example, research through dynamic mesh simulation indicates that when the swing check valve closes, the fluid countercurrent has hysteresis, the valve disc movement speed rises in a parabolic manner, the dynamic torque changes violently, and multiple collisions between the valve disc and the valve seat lead to stress concentration. Another example is that research uses Workbench to conduct thermal-fluid-solid coupling analysis for cryogenic LNG valves.

[0003] However, there are still deficiencies in the existing research on the transient dynamics coupling mechanism under complex working conditions. One is the lack of coupling research between the transient flow field and the dynamic response of the valve disc. Most are based on steady-state models and it is difficult to capture the transient characteristics of the internal flow field during the valve movement. The other is the lack of fluid-solid coupling and characteristics under multiple working conditions. It does not involve the high-temperature environment and different operating states of nuclear power plants, and the research on swing check valves has not been in-depth yet. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a transient dynamics analysis method, device, storage medium, and electronic device for a swing check valve in view of the problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problems is to construct a transient dynamics analysis method for a swing check valve, including the following steps:

[0006] Obtain the parameter information and design conditions of the check valve;

[0007] Construct a three-dimensional model of the check valve based on the parameter information and design conditions;

[0008] Perform full-flow transient fluid mechanics calculations based on the three-dimensional model to obtain calculation results;

[0009] Analyze the distribution characteristics of the internal flow field according to the calculation results to obtain the distribution characteristics of the internal flow field of the check valve;

[0010] Perform statistical analysis according to the calculation results to obtain the dynamic laws of the check valve.

[0011] In the transient dynamics analysis method for a swing check valve of the present invention, the obtaining of the parameter information of the check valve includes:

[0012] Determine the key components of the check valve according to the structural composition of the check valve;

[0013] Obtain the structural dimension information of the key components; the structural dimension information of the key components is the parameter information.

[0014] In the transient dynamics analysis method of the swing check valve of the present invention, the construction of the three-dimensional model of the check valve based on the parameter information and the design conditions includes:

[0015] Conduct model construction according to the structural dimension information of the key components and the design conditions to obtain an initial model;

[0016] Simplify the initial model to obtain a simplified model;

[0017] Import the simplified model for mesh generation to obtain the three-dimensional model.

[0018] In the transient dynamics analysis method of the swing check valve of the present invention, the full-flow transient fluid mechanics calculation based on the three-dimensional model to obtain the calculation results includes:

[0019] Set the calculation parameters; the setting of the calculation parameters includes: setting the fluid characteristic parameters; setting the structural characteristic parameters of the valve flap, and completing the setting of the calculation parameters;

[0020] Conduct full-flow transient fluid mechanics calculation based on the calculation parameters and the three-dimensional model to obtain the calculation results.

[0021] In the transient dynamics analysis method of the swing check valve of the present invention, the analysis of the internal flow field distribution characteristics according to the calculation results to obtain the internal flow field distribution characteristics of the check valve includes:

[0022] Determine the cross-section of the check valve on the YZ plane;

[0023] Generate the velocity vector diagram and pressure nephogram of the cross-section at different moments during the opening process of the check valve according to the calculation results;

[0024] Analyze the velocity vector diagram and the pressure nephogram to obtain the internal flow field distribution characteristics of the check valve.

[0025] In the transient dynamics analysis method of the swing check valve of the present invention, the statistical analysis according to the calculation results to obtain the dynamic law of the check valve includes:

[0026] Extract the centroid displacement of the valve flap and the angular velocity of the valve flap according to the calculation results;

[0027] Analyze by combining the design condition data of different inlet pressures from high pressure to low pressure to obtain the dynamic law of the check valve.

[0028] In the transient dynamics analysis method of the swing check valve according to the present invention, the method further includes:

[0029] Store the dynamic law of the check valve in a database.

[0030] The present invention also provides a transient dynamics analysis device for a swing check valve, including:

[0031] An information acquisition unit for acquiring parameter information and design conditions of the check valve;

[0032] A model construction unit for constructing a three-dimensional model of the check valve based on the parameter information and design conditions;

[0033] A hydrodynamic calculation unit for performing full-flow transient hydrodynamic calculations based on the three-dimensional model to obtain calculation results;

[0034] An internal flow field distribution characteristic analysis unit for analyzing the internal flow field distribution characteristics according to the calculation results to obtain the internal flow field distribution characteristics of the check valve;

[0035] A dynamics analysis unit for performing statistical analysis according to the calculation results to obtain the dynamic law of the check valve.

[0036] The present invention also provides a storage medium storing a computer program, which is suitable for being loaded by a processor to execute the steps of the transient dynamics analysis method of the swing check valve as described above.

[0037] The present invention also provides an electronic device including a memory and a processor, wherein the memory stores a computer program, and the processor executes the steps of the transient dynamics analysis method of the swing check valve as described above by calling the computer program stored in the memory.

[0038] Implementing the transient dynamics analysis method, device, storage medium and electronic device of the swing check valve of the present invention has the following beneficial effects: including the following steps: obtaining the parameter information and design conditions of the check valve; constructing a three-dimensional model of the check valve based on the parameter information and design conditions; performing full-flow transient fluid mechanics calculations based on the three-dimensional model to obtain calculation results; analyzing the internal flow field distribution characteristics according to the calculation results to obtain the internal flow field distribution characteristics of the check valve; and performing statistical analysis according to the calculation results to obtain the dynamic laws of the check valve. The present invention realizes high-precision transient dynamics characteristic analysis of the swing check valve and improves multi-condition adaptability, can quickly predict the valve movement law, and enhances safety and reduces operation and maintenance costs, which is significantly better than the traditional steady-state model. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0040] Figure 1 is a schematic flow chart of the transient dynamics analysis method of the swing check valve provided by the present invention;

[0041] Figure 2 is a logical block diagram of the transient dynamics analysis device of the swing check valve provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] Refer to Figure 1 , Figure 1 which is a schematic flow chart of the transient dynamics analysis method of the swing check valve provided by the present invention.

[0044] As Figure 1 shown, the transient dynamics analysis method of the swing check valve includes the following steps:

[0045] Step S101: Obtain the parameter information and design conditions of the check valve.

[0046] Optionally, in the embodiments of the present invention, obtaining the parameter information of the check valve includes: determining the key components of the check valve according to the structural composition of the check valve; obtaining the structural dimension information of the key components; the structural dimension information of the key components is the parameter information. Specifically, according to the structural composition of the existing swing check valve in the nuclear power plant, its key components are determined, and then the structural dimension information of the key components is extracted. Among them, the key components may include, but are not limited to, the valve body, valve cover, valve disc, valve seat, valve stem, etc. Among them, the structural dimension information of the key components includes: the diameter and thickness of the valve disc; the inner diameter and sealing surface inclination angle of the valve seat; the length of the valve stem; the inner diameter of the inlet and outlet pipelines. The check valve referred to in the present invention is a swing check valve.

[0047] Step S102: Construct a three-dimensional model of the check valve based on the parameter information and the design conditions.

[0048] Optionally, in the embodiments of the present invention, constructing a three-dimensional model of the check valve based on the parameter information and the design conditions includes: performing model construction according to the structural dimension information of the key components and the design conditions to obtain an initial model; simplifying the initial model to obtain a simplified model; importing the simplified model for mesh generation to obtain a three-dimensional model.

[0049] Specifically, first define the operating parameters of the check valve for different design conditions, mainly that the inlet pressure gradually decreases from the high-pressure condition of 13.2 MPa to the low-pressure condition of 4.5 MPa. Then start the construction of the three-dimensional model as follows:

[0050] (1) Based on the key structural dimensions, construct a parametric initial model; focus on processing complex geometric features such as the valve disc-valve seat contact surface and the flow channel transition area;

[0051] (2) Remove non-key structures (such as bolt holes) to simplify the model and make it representative, while retaining the continuity of the flow channel;

[0052] (3) Import the simplified model into a mesh generation tool (such as HyperMesh) to generate a high-precision mesh, locally refine the valve disc edge, valve seat sealing surface and flow channel boundary layer, with a total mesh quantity of about 500,000, to ensure the analytical ability of the complex flow field area and obtain the final three-dimensional model.

[0053] Step S103: Perform full-flow transient fluid mechanics calculations based on the three-dimensional model to obtain calculation results.

[0054] Optionally, in the embodiments of the present invention, performing full-flow transient fluid mechanics calculations based on the three-dimensional model to obtain calculation results includes: setting calculation parameters; performing full-flow transient fluid mechanics calculations based on the calculation parameters and the three-dimensional model to obtain calculation results. Among them, setting the calculation parameters includes: setting fluid characteristic parameters; setting valve disc structural characteristic parameters to complete the setting of the calculation parameters.

[0055] Specifically, first, set the gravitational acceleration with a magnitude of 9.81 m / s 2 ; set the k-epsilon model; set the relevant parameters of the standard wall function (SWF); among them, the boundary conditions are set according to the design conditions, that is, the inlet pressure is from 13.2 MPa to 4.5 MPa, decreasing in a gradient of 1 MPa, and the setting of fluid characteristic parameters is completed.

[0056] Then, set the structural characteristics of the valve flap. Include: the floating moment and gravitational moment of the valve flap, the opening angle, the water impact moment, the closing resistance moment of the valve flap, etc. Among them, when the swing check valve works, the valve flap is mainly affected by the fluid hydrodynamic force, buoyancy, its own gravity, and the supporting force and friction force between the valve flap and the valve seat. According to Newton's second law, the valve flap dynamics equation can be expressed as:

[0057]

[0058] Among them, I is the moment of inertia of the valve flap rotation, α is the opening angle, T G is the floating moment and gravitational moment of the valve flap, T P is the water impact moment, T F is the closing resistance moment of the valve flap, T f is the frictional moment.

[0059] Finally, after completing the above settings, use Fluent for calculation to obtain the calculation results. The calculation results are transient calculation results. Among them, the transient calculation results can include the valve flap opening, the valve flap angular velocity, and the valve flap stress.

[0060] Step S104: Analyze the internal flow field distribution characteristics according to the calculation results to obtain the internal flow field distribution characteristics of the check valve.

[0061] Optionally, in the embodiment of the present invention, analyzing the internal flow field distribution characteristics according to the calculation results to obtain the internal flow field distribution characteristics of the check valve includes: determining the cross-section plane of the check valve in the YZ plane; generating a velocity vector diagram and a pressure contour map of the cross-section plane at different moments during the opening process of the check valve according to the calculation results; analyzing the velocity vector diagram and the pressure contour map to obtain the internal flow field distribution characteristics of the check valve.

[0062] Specifically, select the cross-section plane of the check valve in the YZ plane, and then generate a velocity vector diagram and a pressure contour map of the cross-section plane at different moments during the opening process of the check valve according to the calculation results, and analyze the distribution characteristics of the fluid velocity and pressure in the diagram to obtain the internal flow field distribution characteristics during the opening process of the check valve.

[0063] Step S105: Conduct statistical analysis according to the calculation results to obtain the dynamic law of the check valve.

[0064] Optionally, in the embodiments of the present invention, statistical analysis is performed based on the calculation results to obtain the dynamic laws of the check valve, including: extracting the displacement of the valve disc centroid and the angular velocity of the valve disc according to the calculation results; analyzing in combination with the design condition data of different inlet pressures from high pressure to low pressure to obtain the dynamic laws of the check valve. Among them, the dynamic laws include: the valve disc opening - time relationship curve, the valve disc angular velocity - time relationship curve, and the valve disc stress - time relationship curve.

[0065] Specifically, the displacement of the valve disc centroid (s(t)) and the angular velocity (ω(t)) are extracted from the Fluent transient calculation results, exported in CSV format, and the design condition data of four types of different inlet pressures from high pressure to low pressure are integrated to obtain the curves of the valve disc opening, angular velocity, and stress changing with time, that is, the valve disc opening - time relationship curve, the valve disc angular velocity - time relationship curve, and the valve disc stress - time relationship curve.

[0066] Furthermore, in the embodiments of the present invention, after obtaining the dynamic laws of the check valve, the dynamic laws of the check valve (i.e., the valve disc opening - time relationship curve, the valve disc angular velocity - time relationship curve, and the valve disc stress - time relationship curve) can also be stored in the database, so as to realize the subsequent application of the dynamic laws of the check valve, such as directly calling the dynamic laws of the check valve from the database for related calculations, predictions, analysis and verification, etc.

[0067] Reference Figure 2 , Figure 2 is the logical block diagram of the swing check valve transient dynamics analysis device provided by the present invention.

[0068] As Figure 2 shown, the swing check valve transient dynamics analysis device includes:

[0069] An information acquisition unit 201, configured to acquire the parameter information and design conditions of the check valve.

[0070] A model construction unit 202, configured to construct a three - dimensional model of the check valve based on the parameter information and design conditions.

[0071] A fluid mechanics calculation unit 203, configured to perform full - flow transient fluid mechanics calculations based on the three - dimensional model to obtain calculation results.

[0072] An internal flow field distribution characteristic analysis unit 204, configured to analyze the internal flow field distribution characteristics according to the calculation results to obtain the internal flow field distribution characteristics of the check valve.

[0073] A dynamics analysis unit 205, configured to perform statistical analysis according to the calculation results to obtain the dynamic laws of the check valve.

[0074] Specifically, the specific cooperation operation process among the units in the swing check valve transient dynamics analysis device here can specifically refer to the above swing check valve transient dynamics analysis method, which will not be elaborated here.

[0075] Through the present invention, the transient dynamics analysis of the swing check valve is realized, the high-precision transient dynamics characteristics analysis of the swing check valve is realized, the multi-condition adaptability is improved, the valve motion law prediction can be quickly made, and the safety is enhanced and the operation and maintenance cost is reduced, which is significantly superior to the traditional steady-state model.

[0076] In addition, an electronic device of the present invention includes a memory and a processor; the memory is used to store a computer program; the processor is used to execute the computer program to implement the swing check valve transient dynamics analysis method as described in any one of the above. Specifically, according to the embodiments of the present invention, the process described with reference to the flowchart above can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes program codes for executing the method shown in the flowchart. In such an embodiment, when the computer program is downloaded and installed through the electronic device and executed, it executes the above functions defined in the method of the embodiments of the present invention. The electronic device in the present invention can be a terminal such as a notebook, a desktop computer, a tablet computer, a smart phone, etc., or a server.

[0077] In addition, a storage medium of the present invention stores a computer program, and when the computer program is executed by a processor, it implements the transient dynamics analysis method of the swing check valve described in any one of the above. Specifically, it should be noted that the above storage medium of the present invention may be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, the computer-readable storage medium may be any tangible medium that contains or stores a program, and this program can be used by or in combination with an instruction execution system, apparatus, or device. In the present invention, the computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries computer-readable program code. Such a propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium may also be any computer-readable medium other than the computer-readable storage medium, and this computer-readable signal medium can send, propagate, or transmit a program for use by or in combination with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted by any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0078] The above computer-readable medium may be included in the above electronic device; or it may exist separately and not be assembled into the electronic device.

[0079] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts among the various embodiments can be referred to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0080] Those skilled in the art may further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0081] The steps of the methods or algorithms described in combination with the embodiments disclosed herein can be directly implemented by hardware, software modules executed by a processor, or a combination of the two. The software modules can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well known in the technical field.

[0082] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A transient dynamic analysis method for a swing check valve, characterized in that: The following steps are involved: Obtain parameter information and design conditions of the check valve; Constructing a three-dimensional model of the check valve based on the parameter information and the design working conditions; Perform full-flow transient fluid mechanics calculation based on the three-dimensional model to obtain calculation results; Performing an internal flow field distribution characteristic analysis according to the calculation results to obtain the internal flow field distribution characteristics of the check valve; Statistical analysis is performed based on the calculation results to obtain the dynamic law of the check valve.

2. The transient dynamics analysis method of a swing check valve according to claim 1, characterized in that: The obtaining of parameter information of the check valve includes: Determine the key components of the check valve according to the structural composition of the check valve; The structural dimension information of the key component is obtained; the structural dimension information of the key component is the parameter information.

3. The transient dynamics analysis method of a swing check valve according to claim 2, characterized in that: The constructing of the three-dimensional model of the check valve based on the parameter information and the design working condition comprises: Building a model based on the structural dimension information and design conditions of the key components to obtain an initial model; Simplifying the initial model to obtain a simplified model; The simplified model is imported for meshing to obtain the three-dimensional model.

4. The transient dynamics analysis method of a swing check valve according to claim 1, characterized in that: The full-flow transient fluid mechanics calculation is performed based on the three-dimensional model to obtain the calculation results, including: Setting calculation parameters; the setting of calculation parameters includes: setting fluid characteristic parameters; setting valve disc structure characteristic parameters, and completing the setting of the calculation parameters; Full-flow transient fluid mechanics calculation is performed based on the calculation parameters and the three-dimensional model to obtain the calculation result.

5. The transient dynamics analysis method of a swing check valve according to claim 1, characterized in that: The analyzing the internal flow field distribution characteristics according to the calculation results to obtain the internal flow field distribution characteristics of the check valve includes: Determine a cross-sectional plane of the check valve on the YZ plane; Generate a velocity vector diagram and a pressure cloud diagram of the section surface at different times during the opening process of the check valve according to the calculation results; The velocity vector diagram and the pressure cloud diagram are analyzed to obtain the internal flow field distribution characteristics of the check valve.

6. The transient dynamics analysis method of a swing check valve according to claim 1, characterized in that: The statistical analysis based on the calculation results to obtain the dynamic law of the check valve includes: According to the calculation results, the valve disc centroid displacement and the valve disc angular velocity are extracted; The dynamic law of the check valve is obtained by analyzing the design operating condition data of different inlet pressures from high pressure to low pressure.

7. The method for transient dynamic analysis of a swing check valve according to any one of claims 1 to 6, characterized in that: The method further comprises: The dynamics law of the check valve is stored in a database.

8. A transient dynamics analysis device for a swing check valve, characterized in that: include: An information acquisition unit, used for acquiring parameter information and design working conditions of the check valve; A model building unit, used to build a three-dimensional model of the check valve based on the parameter information and the design working conditions; A fluid mechanics calculation unit, used for performing full-flow transient fluid mechanics calculation based on the three-dimensional model to obtain calculation results; An internal flow field distribution characteristic analysis unit, used to perform internal flow field distribution characteristic analysis according to the calculation result to obtain the internal flow field distribution characteristic of the check valve; The dynamics analysis unit is used to perform statistical analysis based on the calculation results to obtain the dynamics law of the check valve.

9. A storage medium, characterized in that: The storage medium stores a computer program, and the computer program is suitable for being loaded by a processor to execute the steps of the transient dynamics analysis method of a swing check valve as described in any one of claims 1 to 7.

10. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the steps of the transient dynamic analysis method of a swing check valve as claimed in any one of claims 1 to 7 by calling the computer program stored in the memory.

Images